diff --git a/.envrc b/.envrc deleted file mode 100644 index a63eb96..0000000 --- a/.envrc +++ /dev/null @@ -1 +0,0 @@ -use asdf diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml deleted file mode 100644 index 2306ae9..0000000 --- a/.github/workflows/main.yml +++ /dev/null @@ -1,18 +0,0 @@ -name: Build and Deploy -on: [push] -jobs: - build-and-deploy: - runs-on: ubuntu-latest - steps: - - name: Checkout 🛎️ - uses: actions/checkout@v2 - - - name: Install and Build - run: | - npm install - npm run build - - - name: Deploy 🚀 - uses: peaceiris/actions-gh-pages@v3 - with: - github_token: ${{ secrets.GITHUB_TOKEN }} diff --git a/.gitignore b/.gitignore deleted file mode 100644 index 0a03045..0000000 --- a/.gitignore +++ /dev/null @@ -1,2 +0,0 @@ -node_modules/ -public/ diff --git a/.nojekyll b/.nojekyll new file mode 100644 index 0000000..e69de29 diff --git a/.ruby-version b/.ruby-version deleted file mode 100644 index b502146..0000000 --- a/.ruby-version +++ /dev/null @@ -1 +0,0 @@ -3.0.2 diff --git a/.tool-versions b/.tool-versions deleted file mode 100644 index 6439752..0000000 --- a/.tool-versions +++ /dev/null @@ -1,2 +0,0 @@ -ruby 3.0.2 -nodejs 18.9.1 diff --git a/README.md b/README.md deleted file mode 100644 index 5925e4d..0000000 --- a/README.md +++ /dev/null @@ -1,10 +0,0 @@ -# Teoría de TTPS, opción ruby - -Material de las teorías empleado por la materia Tecnologías de Producción de Software, opción Ruby, correspondiente a la Facultad de Informática de la UNLP. - - -## Como editar el material - -* Clonar el repositorio -* Instalar las dependencias: `npm i` -* Correr en modo desarrollo: `npm start` diff --git a/_assets/node_modules/reveal.js-copycode/plugin/copycode/copycode.css b/_assets/node_modules/reveal.js-copycode/plugin/copycode/copycode.css new file mode 100644 index 0000000..72c6ae6 --- /dev/null +++ b/_assets/node_modules/reveal.js-copycode/plugin/copycode/copycode.css @@ -0,0 +1,61 @@ +.reveal pre, .codeblock { + width: 100%; +} + +.codeblock { + margin: 20px auto; + position: relative; +} + +.codeblock pre { + margin: 0; + width: 100%; + font-size: 1.5rem; +} + +.codeblock > button { + --copy-bg: orange; + --copied-bg: green; + --copy-color: black; + --copied-color: white; + opacity: 0.5; + z-index: 1; + display: block; + position: absolute; + right: 0; + top: 0; + background-color: var(--copy-bg); + color: var(--copy-color); + border: 0; + margin: 0; + padding: 0.2em 0.5em; + font-family: inherit; + font-size: 1.5rem; + -webkit-user-select: none; + -moz-user-select: none; + -ms-user-select: none; + user-select: none; + -webkit-transform: translate3d(0, 0, 0); + transform: translate3d(0, 0, 0); + -webkit-transition: background-color 0.25s ease-in-out, opacity 0.25s ease-in-out; + -o-transition: background-color 0.25s ease-in-out, opacity 0.25s ease-in-out; + transition: background-color 0.25s ease-in-out, opacity 0.25s ease-in-out; + -webkit-font-smoothing: antialiased; + -moz-osx-font-smoothing: grayscale; + cursor: pointer; +} + +.codeblock > button:hover, pre > button:hover { + opacity: 1; +} + +.codeblock > button[disabled] { + opacity: 1; + background-color: var(--copied-bg); + color: var(--copied-color); + cursor: default; +} + +.codeblock > button:focus { + outline: 0; +} \ No newline at end of file diff --git a/_assets/node_modules/reveal.js-copycode/plugin/copycode/copycode.js b/_assets/node_modules/reveal.js-copycode/plugin/copycode/copycode.js new file mode 100644 index 0000000..b4db2cd --- /dev/null +++ b/_assets/node_modules/reveal.js-copycode/plugin/copycode/copycode.js @@ -0,0 +1,198 @@ + +/***************************************************************** + * @author: Martijn De Jongh (Martino), martijn.de.jongh@gmail.com + * https://github.com/Martinomagnifico + * + * CopyCode.js for Reveal.js + * Version 1.0.4 + * + * @license + * MIT licensed + * + * Thanks to: + * - Hakim El Hattab, Reveal.js + ******************************************************************/ + + +(function (global, factory) { + typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() : + typeof define === 'function' && define.amd ? define(factory) : + (global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.CopyCode = factory()); +})(this, (function () { 'use strict'; + + var Plugin = function Plugin() { + function loadResource(url, type, callback) { + var head = document.querySelector('head'); + var resource; + + if (type === 'script') { + resource = document.createElement('script'); + resource.type = 'text/javascript'; + resource.src = url; + } else if (type === 'stylesheet') { + resource = document.createElement('link'); + resource.rel = 'stylesheet'; + resource.href = url; + } + + var finish = function finish() { + if (typeof callback === 'function') { + callback.call(); + callback = null; + } + }; + + resource.onload = finish; + + resource.onreadystatechange = function () { + if (this.readyState === 'loaded') { + finish(); + } + }; + + head.appendChild(resource); + } + + var getCodeBlocks = function getCodeBlocks(codeblocks, options) { + var styleButton = function styleButton(button, codeblock) { + var codeblockData = codeblock.dataset; + button.textContent = codeblockData.ccCopy ? codeblockData.ccCopy : options.copy; + button.setAttribute("data-cc-copied", codeblockData.ccCopied ? codeblockData.ccCopied : options.copied); + ["data-cc-copy", "data-cc-copied"].forEach(function (attribute) { + return codeblock.removeAttribute(attribute); + }); + button.style.setProperty('--copy-bg', options.copybg); + button.style.setProperty('--copy-color', options.copycolor); + button.style.setProperty('--copied-bg', options.copiedbg); + button.style.setProperty('--copied-color', options.copiedcolor); + }; + + var buildStructure = function buildStructure(codeblock) { + var wrapper = document.createElement("div"); + wrapper.classList.add("codeblock"); + codeblock.parentNode.insertBefore(wrapper, codeblock); + wrapper.appendChild(codeblock); + + if (codeblock.classList.contains("fragment")) { + wrapper.classList.add("fragment"); + codeblock.classList.remove("fragment"); + } + + var button = document.createElement("button"); + styleButton(button, codeblock); + wrapper.insertBefore(button, codeblock); + }; + + codeblocks.forEach(function (codeblock) { + if (codeblock.getAttribute("data-cc") && codeblock.getAttribute("data-cc") === "false") { + return; + } else { + if (!codeblock.parentNode.classList.contains("codeblock")) { + buildStructure(codeblock); + } + } + }); + var clipboard = new ClipboardJS(".codeblock > button", { + target: function target(trigger) { + return trigger.nextElementSibling.firstChild; + } + }); + + function plaintextClipboard(copied) { + var listener = function listener(ev) { + var text = copied.replace(/^\s*\n/gm, ""); + ev.preventDefault(); + + if (ev.clipboardData && ev.clipboardData.getData) { + ev.clipboardData.setData('text/plain', text); + } else if (window.clipboardData && window.clipboardData.getData) { + window.clipboardData.setData('text/plain', text); + } + }; + + document.addEventListener('copy', listener); + document.execCommand('copy'); + document.removeEventListener('copy', listener); + } + + clipboard.on("success", function (e) { + if (options.plaintextonly == true) { + plaintextClipboard(e.text); + } + + var button = e.trigger; + e.clearSelection(); + button.setAttribute("data-text-original", button.innerHTML); + button.innerHTML = button.getAttribute("data-cc-copied"); + button.setAttribute("disabled", true); + setTimeout(function () { + button.innerHTML = button.getAttribute("data-text-original"); + button.removeAttribute("disabled"); + }, options.timeout); + }); + }; + + var init = function init(deck) { + var es5Filename = "copycode.js"; + var defaultOptions = { + plaintextonly: true, + timeout: 1000, + copy: "Copy", + copied: "Copied!", + copybg: "orange", + copiedbg: "green", + copycolor: "black", + copiedcolor: "white", + csspath: "", + clipboardjspath: "" + }; + + var defaults = function defaults(options, defaultOptions) { + for (var i in defaultOptions) { + if (!options.hasOwnProperty(i)) { + options[i] = defaultOptions[i]; + } + } + }; + + var options = deck.getConfig().copycode || {}; + defaults(options, defaultOptions); + + function pluginPath() { + var path; + var pluginScript = document.querySelector("script[src$=\"".concat(es5Filename, "\"]")); + + if (pluginScript) { + path = pluginScript.getAttribute("src").slice(0, -1 * es5Filename.length); + } else { + path = (typeof document === 'undefined' && typeof location === 'undefined' ? new (require('u' + 'rl').URL)('file:' + __filename).href : typeof document === 'undefined' ? location.href : (document.currentScript && document.currentScript.src || new URL('copycode.js', document.baseURI).href)).slice(0, (typeof document === 'undefined' && typeof location === 'undefined' ? new (require('u' + 'rl').URL)('file:' + __filename).href : typeof document === 'undefined' ? location.href : (document.currentScript && document.currentScript.src || new URL('copycode.js', document.baseURI).href)).lastIndexOf('/') + 1); + } + + return path; + } + + var ClipboardJSPath = options.clipboardjspath != "" ? options.clipboardjspath : "https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/2.0.11/clipboard.min.js"; + var CopyCodeStylePath = options.csspath ? options.csspath : "".concat(pluginPath(), "copycode.css") || 'plugin/copycode/copycode.css'; + loadResource(CopyCodeStylePath, 'stylesheet', function () {}); + loadResource(ClipboardJSPath, 'script', function () { + if (typeof ClipboardJS === "function") { + var codeblocks = deck.getRevealElement().querySelectorAll("pre"); + + if (codeblocks.length > 0) { + getCodeBlocks(codeblocks, options); + } + } else { + console.log("Clipboard.js did not load"); + } + }); + }; + + return { + id: 'copycode', + init: init + }; + }; + + return Plugin; + +})); diff --git a/src/css/images/copy-paste.svg 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+{"version":3,"file":"reveal.esm.js","sources":["../js/utils/util.js","../js/utils/device.js","../node_modules/fitty/dist/fitty.module.js","../js/controllers/slidecontent.js","../js/controllers/slidenumber.js","../js/utils/color.js","../js/controllers/backgrounds.js","../js/utils/constants.js","../js/controllers/autoanimate.js","../js/controllers/fragments.js","../js/controllers/overview.js","../js/controllers/keyboard.js","../js/controllers/location.js","../js/controllers/controls.js","../js/controllers/progress.js","../js/controllers/pointer.js","../js/utils/loader.js","../js/controllers/plugins.js","../js/controllers/print.js","../js/controllers/touch.js","../js/controllers/focus.js","../js/controllers/notes.js","../js/components/playback.js","../js/config.js","../js/reveal.js","../js/index.js"],"sourcesContent":["/**\n * Extend object a with the properties of object b.\n * If there's a conflict, object b takes precedence.\n *\n * @param {object} a\n * @param {object} b\n */\nexport const extend = ( a, b ) => {\n\n\tfor( let i in b ) {\n\t\ta[ i ] = b[ i ];\n\t}\n\n\treturn a;\n\n}\n\n/**\n * querySelectorAll but returns an Array.\n */\nexport const queryAll = ( el, selector ) => {\n\n\treturn Array.from( el.querySelectorAll( selector ) );\n\n}\n\n/**\n * classList.toggle() with cross browser support\n */\nexport const toggleClass = ( el, className, value ) => {\n\tif( value ) {\n\t\tel.classList.add( className );\n\t}\n\telse {\n\t\tel.classList.remove( className );\n\t}\n}\n\n/**\n * Utility for deserializing a value.\n *\n * @param {*} value\n * @return {*}\n */\nexport const deserialize = ( value ) => {\n\n\tif( typeof value === 'string' ) {\n\t\tif( value === 'null' ) return null;\n\t\telse if( value === 'true' ) return true;\n\t\telse if( value === 'false' ) return false;\n\t\telse if( value.match( /^-?[\\d\\.]+$/ ) ) return parseFloat( value );\n\t}\n\n\treturn value;\n\n}\n\n/**\n * Measures the distance in pixels between point a\n * and point b.\n *\n * @param {object} a point with x/y properties\n * @param {object} b point with x/y properties\n *\n * @return {number}\n */\nexport const distanceBetween = ( a, b ) => {\n\n\tlet dx = a.x - b.x,\n\t\tdy = a.y - b.y;\n\n\treturn Math.sqrt( dx*dx + dy*dy );\n\n}\n\n/**\n * Applies a CSS transform to the target element.\n *\n * @param {HTMLElement} element\n * @param {string} transform\n */\nexport const transformElement = ( element, transform ) => {\n\n\telement.style.transform = transform;\n\n}\n\n/**\n * Element.matches with IE support.\n *\n * @param {HTMLElement} target The element to match\n * @param {String} selector The CSS selector to match\n * the element against\n *\n * @return {Boolean}\n */\nexport const matches = ( target, selector ) => {\n\n\tlet matchesMethod = target.matches || target.matchesSelector || target.msMatchesSelector;\n\n\treturn !!( matchesMethod && matchesMethod.call( target, selector ) );\n\n}\n\n/**\n * Find the closest parent that matches the given\n * selector.\n *\n * @param {HTMLElement} target The child element\n * @param {String} selector The CSS selector to match\n * the parents against\n *\n * @return {HTMLElement} The matched parent or null\n * if no matching parent was found\n */\nexport const closest = ( target, selector ) => {\n\n\t// Native Element.closest\n\tif( typeof target.closest === 'function' ) {\n\t\treturn target.closest( selector );\n\t}\n\n\t// Polyfill\n\twhile( target ) {\n\t\tif( matches( target, selector ) ) {\n\t\t\treturn target;\n\t\t}\n\n\t\t// Keep searching\n\t\ttarget = target.parentNode;\n\t}\n\n\treturn null;\n\n}\n\n/**\n * Handling the fullscreen functionality via the fullscreen API\n *\n * @see http://fullscreen.spec.whatwg.org/\n * @see https://developer.mozilla.org/en-US/docs/DOM/Using_fullscreen_mode\n */\nexport const enterFullscreen = element => {\n\n\telement = element || document.documentElement;\n\n\t// Check which implementation is available\n\tlet requestMethod = element.requestFullscreen ||\n\t\t\t\t\t\telement.webkitRequestFullscreen ||\n\t\t\t\t\t\telement.webkitRequestFullScreen ||\n\t\t\t\t\t\telement.mozRequestFullScreen ||\n\t\t\t\t\t\telement.msRequestFullscreen;\n\n\tif( requestMethod ) {\n\t\trequestMethod.apply( element );\n\t}\n\n}\n\n/**\n * Creates an HTML element and returns a reference to it.\n * If the element already exists the existing instance will\n * be returned.\n *\n * @param {HTMLElement} container\n * @param {string} tagname\n * @param {string} classname\n * @param {string} innerHTML\n *\n * @return {HTMLElement}\n */\nexport const createSingletonNode = ( container, tagname, classname, innerHTML='' ) => {\n\n\t// Find all nodes matching the description\n\tlet nodes = container.querySelectorAll( '.' + classname );\n\n\t// Check all matches to find one which is a direct child of\n\t// the specified container\n\tfor( let i = 0; i < nodes.length; i++ ) {\n\t\tlet testNode = nodes[i];\n\t\tif( testNode.parentNode === container ) {\n\t\t\treturn testNode;\n\t\t}\n\t}\n\n\t// If no node was found, create it now\n\tlet node = document.createElement( tagname );\n\tnode.className = classname;\n\tnode.innerHTML = innerHTML;\n\tcontainer.appendChild( node );\n\n\treturn node;\n\n}\n\n/**\n * Injects the given CSS styles into the DOM.\n *\n * @param {string} value\n */\nexport const createStyleSheet = ( value ) => {\n\n\tlet tag = document.createElement( 'style' );\n\ttag.type = 'text/css';\n\n\tif( value && value.length > 0 ) {\n\t\tif( tag.styleSheet ) {\n\t\t\ttag.styleSheet.cssText = value;\n\t\t}\n\t\telse {\n\t\t\ttag.appendChild( document.createTextNode( value ) );\n\t\t}\n\t}\n\n\tdocument.head.appendChild( tag );\n\n\treturn tag;\n\n}\n\n/**\n * Returns a key:value hash of all query params.\n */\nexport const getQueryHash = () => {\n\n\tlet query = {};\n\n\tlocation.search.replace( /[A-Z0-9]+?=([\\w\\.%-]*)/gi, a => {\n\t\tquery[ a.split( '=' ).shift() ] = a.split( '=' ).pop();\n\t} );\n\n\t// Basic deserialization\n\tfor( let i in query ) {\n\t\tlet value = query[ i ];\n\n\t\tquery[ i ] = deserialize( unescape( value ) );\n\t}\n\n\t// Do not accept new dependencies via query config to avoid\n\t// the potential of malicious script injection\n\tif( typeof query['dependencies'] !== 'undefined' ) delete query['dependencies'];\n\n\treturn query;\n\n}\n\n/**\n * Returns the remaining height within the parent of the\n * target element.\n *\n * remaining height = [ configured parent height ] - [ current parent height ]\n *\n * @param {HTMLElement} element\n * @param {number} [height]\n */\nexport const getRemainingHeight = ( element, height = 0 ) => {\n\n\tif( element ) {\n\t\tlet newHeight, oldHeight = element.style.height;\n\n\t\t// Change the .stretch element height to 0 in order find the height of all\n\t\t// the other elements\n\t\telement.style.height = '0px';\n\n\t\t// In Overview mode, the parent (.slide) height is set of 700px.\n\t\t// Restore it temporarily to its natural height.\n\t\telement.parentNode.style.height = 'auto';\n\n\t\tnewHeight = height - element.parentNode.offsetHeight;\n\n\t\t// Restore the old height, just in case\n\t\telement.style.height = oldHeight + 'px';\n\n\t\t// Clear the parent (.slide) height. .removeProperty works in IE9+\n\t\telement.parentNode.style.removeProperty('height');\n\n\t\treturn newHeight;\n\t}\n\n\treturn height;\n\n}\n\nconst fileExtensionToMimeMap = {\n\t'mp4': 'video/mp4',\n\t'm4a': 'video/mp4',\n\t'ogv': 'video/ogg',\n\t'mpeg': 'video/mpeg',\n\t'webm': 'video/webm'\n}\n\n/**\n * Guess the MIME type for common file formats.\n */\nexport const getMimeTypeFromFile = ( filename='' ) => {\n\treturn fileExtensionToMimeMap[filename.split('.').pop()]\n}","const UA = navigator.userAgent;\nconst testElement = document.createElement( 'div' );\n\nexport const isMobile = /(iphone|ipod|ipad|android)/gi.test( UA ) ||\n\t\t\t\t\t\t( navigator.platform === 'MacIntel' && navigator.maxTouchPoints > 1 ); // iPadOS\n\nexport const isChrome = /chrome/i.test( UA ) && !/edge/i.test( UA );\n\nexport const isAndroid = /android/gi.test( UA );\n\n// Flags if we should use zoom instead of transform to scale\n// up slides. Zoom produces crisper results but has a lot of\n// xbrowser quirks so we only use it in whitelisted browsers.\nexport const supportsZoom = 'zoom' in testElement.style && !isMobile &&\n\t\t\t\t( isChrome || /Version\\/[\\d\\.]+.*Safari/.test( UA ) );","/*\n * fitty v2.3.3 - Snugly resizes text to fit its parent container\n * Copyright (c) 2020 Rik Schennink (https://pqina.nl/)\n */\n'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n value: true\n});\n\nvar _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; };\n\nexports.default = function (w) {\n\n // no window, early exit\n if (!w) return;\n\n // node list to array helper method\n var toArray = function toArray(nl) {\n return [].slice.call(nl);\n };\n\n // states\n var DrawState = {\n IDLE: 0,\n DIRTY_CONTENT: 1,\n DIRTY_LAYOUT: 2,\n DIRTY: 3\n };\n\n // all active fitty elements\n var fitties = [];\n\n // group all redraw calls till next frame, we cancel each frame request when a new one comes in. If no support for request animation frame, this is an empty function and supports for fitty stops.\n var redrawFrame = null;\n var requestRedraw = 'requestAnimationFrame' in w ? function () {\n w.cancelAnimationFrame(redrawFrame);\n redrawFrame = w.requestAnimationFrame(function () {\n return redraw(fitties.filter(function (f) {\n return f.dirty && f.active;\n }));\n });\n } : function () {};\n\n // sets all fitties to dirty so they are redrawn on the next redraw loop, then calls redraw\n var redrawAll = function redrawAll(type) {\n return function () {\n fitties.forEach(function (f) {\n return f.dirty = type;\n });\n requestRedraw();\n };\n };\n\n // redraws fitties so they nicely fit their parent container\n var redraw = function redraw(fitties) {\n\n // getting info from the DOM at this point should not trigger a reflow, let's gather as much intel as possible before triggering a reflow\n\n // check if styles of all fitties have been computed\n fitties.filter(function (f) {\n return !f.styleComputed;\n }).forEach(function (f) {\n f.styleComputed = computeStyle(f);\n });\n\n // restyle elements that require pre-styling, this triggers a reflow, please try to prevent by adding CSS rules (see docs)\n fitties.filter(shouldPreStyle).forEach(applyStyle);\n\n // we now determine which fitties should be redrawn\n var fittiesToRedraw = fitties.filter(shouldRedraw);\n\n // we calculate final styles for these fitties\n fittiesToRedraw.forEach(calculateStyles);\n\n // now we apply the calculated styles from our previous loop\n fittiesToRedraw.forEach(function (f) {\n applyStyle(f);\n markAsClean(f);\n });\n\n // now we dispatch events for all restyled fitties\n fittiesToRedraw.forEach(dispatchFitEvent);\n };\n\n var markAsClean = function markAsClean(f) {\n return f.dirty = DrawState.IDLE;\n };\n\n var calculateStyles = function calculateStyles(f) {\n\n // get available width from parent node\n f.availableWidth = f.element.parentNode.clientWidth;\n\n // the space our target element uses\n f.currentWidth = f.element.scrollWidth;\n\n // remember current font size\n f.previousFontSize = f.currentFontSize;\n\n // let's calculate the new font size\n f.currentFontSize = Math.min(Math.max(f.minSize, f.availableWidth / f.currentWidth * f.previousFontSize), f.maxSize);\n\n // if allows wrapping, only wrap when at minimum font size (otherwise would break container)\n f.whiteSpace = f.multiLine && f.currentFontSize === f.minSize ? 'normal' : 'nowrap';\n };\n\n // should always redraw if is not dirty layout, if is dirty layout, only redraw if size has changed\n var shouldRedraw = function shouldRedraw(f) {\n return f.dirty !== DrawState.DIRTY_LAYOUT || f.dirty === DrawState.DIRTY_LAYOUT && f.element.parentNode.clientWidth !== f.availableWidth;\n };\n\n // every fitty element is tested for invalid styles\n var computeStyle = function computeStyle(f) {\n\n // get style properties\n var style = w.getComputedStyle(f.element, null);\n\n // get current font size in pixels (if we already calculated it, use the calculated version)\n f.currentFontSize = parseFloat(style.getPropertyValue('font-size'));\n\n // get display type and wrap mode\n f.display = style.getPropertyValue('display');\n f.whiteSpace = style.getPropertyValue('white-space');\n };\n\n // determines if this fitty requires initial styling, can be prevented by applying correct styles through CSS\n var shouldPreStyle = function shouldPreStyle(f) {\n\n var preStyle = false;\n\n // if we already tested for prestyling we don't have to do it again\n if (f.preStyleTestCompleted) return false;\n\n // should have an inline style, if not, apply\n if (!/inline-/.test(f.display)) {\n preStyle = true;\n f.display = 'inline-block';\n }\n\n // to correctly calculate dimensions the element should have whiteSpace set to nowrap\n if (f.whiteSpace !== 'nowrap') {\n preStyle = true;\n f.whiteSpace = 'nowrap';\n }\n\n // we don't have to do this twice\n f.preStyleTestCompleted = true;\n\n return preStyle;\n };\n\n // apply styles to single fitty\n var applyStyle = function applyStyle(f) {\n f.element.style.whiteSpace = f.whiteSpace;\n f.element.style.display = f.display;\n f.element.style.fontSize = f.currentFontSize + 'px';\n };\n\n // dispatch a fit event on a fitty\n var dispatchFitEvent = function dispatchFitEvent(f) {\n f.element.dispatchEvent(new CustomEvent('fit', {\n detail: {\n oldValue: f.previousFontSize,\n newValue: f.currentFontSize,\n scaleFactor: f.currentFontSize / f.previousFontSize\n }\n }));\n };\n\n // fit method, marks the fitty as dirty and requests a redraw (this will also redraw any other fitty marked as dirty)\n var fit = function fit(f, type) {\n return function () {\n f.dirty = type;\n if (!f.active) return;\n requestRedraw();\n };\n };\n\n var init = function init(f) {\n\n // save some of the original CSS properties before we change them\n f.originalStyle = {\n whiteSpace: f.element.style.whiteSpace,\n display: f.element.style.display,\n fontSize: f.element.style.fontSize\n };\n\n // should we observe DOM mutations\n observeMutations(f);\n\n // this is a new fitty so we need to validate if it's styles are in order\n f.newbie = true;\n\n // because it's a new fitty it should also be dirty, we want it to redraw on the first loop\n f.dirty = true;\n\n // we want to be able to update this fitty\n fitties.push(f);\n };\n\n var destroy = function destroy(f) {\n return function () {\n\n // remove from fitties array\n fitties = fitties.filter(function (_) {\n return _.element !== f.element;\n });\n\n // stop observing DOM\n if (f.observeMutations) f.observer.disconnect();\n\n // reset the CSS properties we changes\n f.element.style.whiteSpace = f.originalStyle.whiteSpace;\n f.element.style.display = f.originalStyle.display;\n f.element.style.fontSize = f.originalStyle.fontSize;\n };\n };\n\n // add a new fitty, does not redraw said fitty\n var subscribe = function subscribe(f) {\n return function () {\n if (f.active) return;\n f.active = true;\n requestRedraw();\n };\n };\n\n // remove an existing fitty\n var unsubscribe = function unsubscribe(f) {\n return function () {\n return f.active = false;\n };\n };\n\n var observeMutations = function observeMutations(f) {\n\n // no observing?\n if (!f.observeMutations) return;\n\n // start observing mutations\n f.observer = new MutationObserver(fit(f, DrawState.DIRTY_CONTENT));\n\n // start observing\n f.observer.observe(f.element, f.observeMutations);\n };\n\n // default mutation observer settings\n var mutationObserverDefaultSetting = {\n subtree: true,\n childList: true,\n characterData: true\n };\n\n // default fitty options\n var defaultOptions = {\n minSize: 16,\n maxSize: 512,\n multiLine: true,\n observeMutations: 'MutationObserver' in w ? mutationObserverDefaultSetting : false\n };\n\n // array of elements in, fitty instances out\n function fittyCreate(elements, options) {\n\n // set options object\n var fittyOptions = _extends({}, defaultOptions, options);\n\n // create fitties\n var publicFitties = elements.map(function (element) {\n\n // create fitty instance\n var f = _extends({}, fittyOptions, {\n\n // internal options for this fitty\n element: element,\n active: true\n });\n\n // initialise this fitty\n init(f);\n\n // expose API\n return {\n element: element,\n fit: fit(f, DrawState.DIRTY),\n unfreeze: subscribe(f),\n freeze: unsubscribe(f),\n unsubscribe: destroy(f)\n };\n });\n\n // call redraw on newly initiated fitties\n requestRedraw();\n\n // expose fitties\n return publicFitties;\n }\n\n // fitty creation function\n function fitty(target) {\n var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n\n\n // if target is a string\n return typeof target === 'string' ?\n\n // treat it as a querySelector\n fittyCreate(toArray(document.querySelectorAll(target)), options) :\n\n // create single fitty\n fittyCreate([target], options)[0];\n }\n\n // handles viewport changes, redraws all fitties, but only does so after a timeout\n var resizeDebounce = null;\n var onWindowResized = function onWindowResized() {\n w.clearTimeout(resizeDebounce);\n resizeDebounce = w.setTimeout(redrawAll(DrawState.DIRTY_LAYOUT), fitty.observeWindowDelay);\n };\n\n // define observe window property, so when we set it to true or false events are automatically added and removed\n var events = ['resize', 'orientationchange'];\n Object.defineProperty(fitty, 'observeWindow', {\n set: function set(enabled) {\n var method = (enabled ? 'add' : 'remove') + 'EventListener';\n events.forEach(function (e) {\n w[method](e, onWindowResized);\n });\n }\n });\n\n // fitty global properties (by setting observeWindow to true the events above get added)\n fitty.observeWindow = true;\n fitty.observeWindowDelay = 100;\n\n // public fit all method, will force redraw no matter what\n fitty.fitAll = redrawAll(DrawState.DIRTY);\n\n // export our fitty function, we don't want to keep it to our selves\n return fitty;\n}(typeof window === 'undefined' ? null : window);","import { extend, queryAll, closest, getMimeTypeFromFile } from '../utils/util.js'\nimport { isMobile } from '../utils/device.js'\n\nimport fitty from 'fitty';\n\n/**\n * Handles loading, unloading and playback of slide\n * content such as images, videos and iframes.\n */\nexport default class SlideContent {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t\tthis.startEmbeddedIframe = this.startEmbeddedIframe.bind( this );\n\n\t}\n\n\t/**\n\t * Should the given element be preloaded?\n\t * Decides based on local element attributes and global config.\n\t *\n\t * @param {HTMLElement} element\n\t */\n\tshouldPreload( element ) {\n\n\t\t// Prefer an explicit global preload setting\n\t\tlet preload = this.Reveal.getConfig().preloadIframes;\n\n\t\t// If no global setting is available, fall back on the element's\n\t\t// own preload setting\n\t\tif( typeof preload !== 'boolean' ) {\n\t\t\tpreload = element.hasAttribute( 'data-preload' );\n\t\t}\n\n\t\treturn preload;\n\t}\n\n\t/**\n\t * Called when the given slide is within the configured view\n\t * distance. Shows the slide element and loads any content\n\t * that is set to load lazily (data-src).\n\t *\n\t * @param {HTMLElement} slide Slide to show\n\t */\n\tload( slide, options = {} ) {\n\n\t\t// Show the slide element\n\t\tslide.style.display = this.Reveal.getConfig().display;\n\n\t\t// Media elements with data-src attributes\n\t\tqueryAll( slide, 'img[data-src], video[data-src], audio[data-src], iframe[data-src]' ).forEach( element => {\n\t\t\tif( element.tagName !== 'IFRAME' || this.shouldPreload( element ) ) {\n\t\t\t\telement.setAttribute( 'src', element.getAttribute( 'data-src' ) );\n\t\t\t\telement.setAttribute( 'data-lazy-loaded', '' );\n\t\t\t\telement.removeAttribute( 'data-src' );\n\t\t\t}\n\t\t} );\n\n\t\t// Media elements with children\n\t\tqueryAll( slide, 'video, audio' ).forEach( media => {\n\t\t\tlet sources = 0;\n\n\t\t\tqueryAll( media, 'source[data-src]' ).forEach( source => {\n\t\t\t\tsource.setAttribute( 'src', source.getAttribute( 'data-src' ) );\n\t\t\t\tsource.removeAttribute( 'data-src' );\n\t\t\t\tsource.setAttribute( 'data-lazy-loaded', '' );\n\t\t\t\tsources += 1;\n\t\t\t} );\n\n\t\t\t// Enable inline video playback in mobile Safari\n\t\t\tif( isMobile && media.tagName === 'VIDEO' ) {\n\t\t\t\tmedia.setAttribute( 'playsinline', '' );\n\t\t\t}\n\n\t\t\t// If we rewrote sources for this video/audio element, we need\n\t\t\t// to manually tell it to load from its new origin\n\t\t\tif( sources > 0 ) {\n\t\t\t\tmedia.load();\n\t\t\t}\n\t\t} );\n\n\n\t\t// Show the corresponding background element\n\t\tlet background = slide.slideBackgroundElement;\n\t\tif( background ) {\n\t\t\tbackground.style.display = 'block';\n\n\t\t\tlet backgroundContent = slide.slideBackgroundContentElement;\n\t\t\tlet backgroundIframe = slide.getAttribute( 'data-background-iframe' );\n\n\t\t\t// If the background contains media, load it\n\t\t\tif( background.hasAttribute( 'data-loaded' ) === false ) {\n\t\t\t\tbackground.setAttribute( 'data-loaded', 'true' );\n\n\t\t\t\tlet backgroundImage = slide.getAttribute( 'data-background-image' ),\n\t\t\t\t\tbackgroundVideo = slide.getAttribute( 'data-background-video' ),\n\t\t\t\t\tbackgroundVideoLoop = slide.hasAttribute( 'data-background-video-loop' ),\n\t\t\t\t\tbackgroundVideoMuted = slide.hasAttribute( 'data-background-video-muted' );\n\n\t\t\t\t// Images\n\t\t\t\tif( backgroundImage ) {\n\t\t\t\t\t// base64\n\t\t\t\t\tif( /^data:/.test( backgroundImage.trim() ) ) {\n\t\t\t\t\t\tbackgroundContent.style.backgroundImage = `url(${backgroundImage.trim()})`;\n\t\t\t\t\t}\n\t\t\t\t\t// URL(s)\n\t\t\t\t\telse {\n\t\t\t\t\t\tbackgroundContent.style.backgroundImage = backgroundImage.split( ',' ).map( background => {\n\t\t\t\t\t\t\treturn `url(${encodeURI(background.trim())})`;\n\t\t\t\t\t\t}).join( ',' );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\t// Videos\n\t\t\t\telse if ( backgroundVideo && !this.Reveal.isSpeakerNotes() ) {\n\t\t\t\t\tlet video = document.createElement( 'video' );\n\n\t\t\t\t\tif( backgroundVideoLoop ) {\n\t\t\t\t\t\tvideo.setAttribute( 'loop', '' );\n\t\t\t\t\t}\n\n\t\t\t\t\tif( backgroundVideoMuted ) {\n\t\t\t\t\t\tvideo.muted = true;\n\t\t\t\t\t}\n\n\t\t\t\t\t// Enable inline playback in mobile Safari\n\t\t\t\t\t//\n\t\t\t\t\t// Mute is required for video to play when using\n\t\t\t\t\t// swipe gestures to navigate since they don't\n\t\t\t\t\t// count as direct user actions :'(\n\t\t\t\t\tif( isMobile ) {\n\t\t\t\t\t\tvideo.muted = true;\n\t\t\t\t\t\tvideo.setAttribute( 'playsinline', '' );\n\t\t\t\t\t}\n\n\t\t\t\t\t// Support comma separated lists of video sources\n\t\t\t\t\tbackgroundVideo.split( ',' ).forEach( source => {\n\t\t\t\t\t\tlet type = getMimeTypeFromFile( source );\n\t\t\t\t\t\tif( type ) {\n\t\t\t\t\t\t\tvideo.innerHTML += ``;\n\t\t\t\t\t\t}\n\t\t\t\t\t\telse {\n\t\t\t\t\t\t\tvideo.innerHTML += ``;\n\t\t\t\t\t\t}\n\t\t\t\t\t} );\n\n\t\t\t\t\tbackgroundContent.appendChild( video );\n\t\t\t\t}\n\t\t\t\t// Iframes\n\t\t\t\telse if( backgroundIframe && options.excludeIframes !== true ) {\n\t\t\t\t\tlet iframe = document.createElement( 'iframe' );\n\t\t\t\t\tiframe.setAttribute( 'allowfullscreen', '' );\n\t\t\t\t\tiframe.setAttribute( 'mozallowfullscreen', '' );\n\t\t\t\t\tiframe.setAttribute( 'webkitallowfullscreen', '' );\n\t\t\t\t\tiframe.setAttribute( 'allow', 'autoplay' );\n\n\t\t\t\t\tiframe.setAttribute( 'data-src', backgroundIframe );\n\n\t\t\t\t\tiframe.style.width = '100%';\n\t\t\t\t\tiframe.style.height = '100%';\n\t\t\t\t\tiframe.style.maxHeight = '100%';\n\t\t\t\t\tiframe.style.maxWidth = '100%';\n\n\t\t\t\t\tbackgroundContent.appendChild( iframe );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Start loading preloadable iframes\n\t\t\tlet backgroundIframeElement = backgroundContent.querySelector( 'iframe[data-src]' );\n\t\t\tif( backgroundIframeElement ) {\n\n\t\t\t\t// Check if this iframe is eligible to be preloaded\n\t\t\t\tif( this.shouldPreload( background ) && !/autoplay=(1|true|yes)/gi.test( backgroundIframe ) ) {\n\t\t\t\t\tif( backgroundIframeElement.getAttribute( 'src' ) !== backgroundIframe ) {\n\t\t\t\t\t\tbackgroundIframeElement.setAttribute( 'src', backgroundIframe );\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\tthis.layout( slide );\n\n\t}\n\n\t/**\n\t * Applies JS-dependent layout helpers for the given slide,\n\t * if there are any.\n\t */\n\tlayout( slide ) {\n\n\t\t// Autosize text with the r-fit-text class based on the\n\t\t// size of its container. This needs to happen after the\n\t\t// slide is visible in order to measure the text.\n\t\tArray.from( slide.querySelectorAll( '.r-fit-text' ) ).forEach( element => {\n\t\t\tfitty( element, {\n\t\t\t\tminSize: 24,\n\t\t\t\tmaxSize: this.Reveal.getConfig().height * 0.8,\n\t\t\t\tobserveMutations: false,\n\t\t\t\tobserveWindow: false\n\t\t\t} );\n\t\t} );\n\n\t}\n\n\t/**\n\t * Unloads and hides the given slide. This is called when the\n\t * slide is moved outside of the configured view distance.\n\t *\n\t * @param {HTMLElement} slide\n\t */\n\tunload( slide ) {\n\n\t\t// Hide the slide element\n\t\tslide.style.display = 'none';\n\n\t\t// Hide the corresponding background element\n\t\tlet background = this.Reveal.getSlideBackground( slide );\n\t\tif( background ) {\n\t\t\tbackground.style.display = 'none';\n\n\t\t\t// Unload any background iframes\n\t\t\tqueryAll( background, 'iframe[src]' ).forEach( element => {\n\t\t\t\telement.removeAttribute( 'src' );\n\t\t\t} );\n\t\t}\n\n\t\t// Reset lazy-loaded media elements with src attributes\n\t\tqueryAll( slide, 'video[data-lazy-loaded][src], audio[data-lazy-loaded][src], iframe[data-lazy-loaded][src]' ).forEach( element => {\n\t\t\telement.setAttribute( 'data-src', element.getAttribute( 'src' ) );\n\t\t\telement.removeAttribute( 'src' );\n\t\t} );\n\n\t\t// Reset lazy-loaded media elements with children\n\t\tqueryAll( slide, 'video[data-lazy-loaded] source[src], audio source[src]' ).forEach( source => {\n\t\t\tsource.setAttribute( 'data-src', source.getAttribute( 'src' ) );\n\t\t\tsource.removeAttribute( 'src' );\n\t\t} );\n\n\t}\n\n\t/**\n\t * Enforces origin-specific format rules for embedded media.\n\t */\n\tformatEmbeddedContent() {\n\n\t\tlet _appendParamToIframeSource = ( sourceAttribute, sourceURL, param ) => {\n\t\t\tqueryAll( this.Reveal.getSlidesElement(), 'iframe['+ sourceAttribute +'*=\"'+ sourceURL +'\"]' ).forEach( el => {\n\t\t\t\tlet src = el.getAttribute( sourceAttribute );\n\t\t\t\tif( src && src.indexOf( param ) === -1 ) {\n\t\t\t\t\tel.setAttribute( sourceAttribute, src + ( !/\\?/.test( src ) ? '?' : '&' ) + param );\n\t\t\t\t}\n\t\t\t});\n\t\t};\n\n\t\t// YouTube frames must include \"?enablejsapi=1\"\n\t\t_appendParamToIframeSource( 'src', 'youtube.com/embed/', 'enablejsapi=1' );\n\t\t_appendParamToIframeSource( 'data-src', 'youtube.com/embed/', 'enablejsapi=1' );\n\n\t\t// Vimeo frames must include \"?api=1\"\n\t\t_appendParamToIframeSource( 'src', 'player.vimeo.com/', 'api=1' );\n\t\t_appendParamToIframeSource( 'data-src', 'player.vimeo.com/', 'api=1' );\n\n\t}\n\n\t/**\n\t * Start playback of any embedded content inside of\n\t * the given element.\n\t *\n\t * @param {HTMLElement} element\n\t */\n\tstartEmbeddedContent( element ) {\n\n\t\tif( element && !this.Reveal.isSpeakerNotes() ) {\n\n\t\t\t// Restart GIFs\n\t\t\tqueryAll( element, 'img[src$=\".gif\"]' ).forEach( el => {\n\t\t\t\t// Setting the same unchanged source like this was confirmed\n\t\t\t\t// to work in Chrome, FF & Safari\n\t\t\t\tel.setAttribute( 'src', el.getAttribute( 'src' ) );\n\t\t\t} );\n\n\t\t\t// HTML5 media elements\n\t\t\tqueryAll( element, 'video, audio' ).forEach( el => {\n\t\t\t\tif( closest( el, '.fragment' ) && !closest( el, '.fragment.visible' ) ) {\n\t\t\t\t\treturn;\n\t\t\t\t}\n\n\t\t\t\t// Prefer an explicit global autoplay setting\n\t\t\t\tlet autoplay = this.Reveal.getConfig().autoPlayMedia;\n\n\t\t\t\t// If no global setting is available, fall back on the element's\n\t\t\t\t// own autoplay setting\n\t\t\t\tif( typeof autoplay !== 'boolean' ) {\n\t\t\t\t\tautoplay = el.hasAttribute( 'data-autoplay' ) || !!closest( el, '.slide-background' );\n\t\t\t\t}\n\n\t\t\t\tif( autoplay && typeof el.play === 'function' ) {\n\n\t\t\t\t\t// If the media is ready, start playback\n\t\t\t\t\tif( el.readyState > 1 ) {\n\t\t\t\t\t\tthis.startEmbeddedMedia( { target: el } );\n\t\t\t\t\t}\n\t\t\t\t\t// Mobile devices never fire a loaded event so instead\n\t\t\t\t\t// of waiting, we initiate playback\n\t\t\t\t\telse if( isMobile ) {\n\t\t\t\t\t\tlet promise = el.play();\n\n\t\t\t\t\t\t// If autoplay does not work, ensure that the controls are visible so\n\t\t\t\t\t\t// that the viewer can start the media on their own\n\t\t\t\t\t\tif( promise && typeof promise.catch === 'function' && el.controls === false ) {\n\t\t\t\t\t\t\tpromise.catch( () => {\n\t\t\t\t\t\t\t\tel.controls = true;\n\n\t\t\t\t\t\t\t\t// Once the video does start playing, hide the controls again\n\t\t\t\t\t\t\t\tel.addEventListener( 'play', () => {\n\t\t\t\t\t\t\t\t\tel.controls = false;\n\t\t\t\t\t\t\t\t} );\n\t\t\t\t\t\t\t} );\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t\t// If the media isn't loaded, wait before playing\n\t\t\t\t\telse {\n\t\t\t\t\t\tel.removeEventListener( 'loadeddata', this.startEmbeddedMedia ); // remove first to avoid dupes\n\t\t\t\t\t\tel.addEventListener( 'loadeddata', this.startEmbeddedMedia );\n\t\t\t\t\t}\n\n\t\t\t\t}\n\t\t\t} );\n\n\t\t\t// Normal iframes\n\t\t\tqueryAll( element, 'iframe[src]' ).forEach( el => {\n\t\t\t\tif( closest( el, '.fragment' ) && !closest( el, '.fragment.visible' ) ) {\n\t\t\t\t\treturn;\n\t\t\t\t}\n\n\t\t\t\tthis.startEmbeddedIframe( { target: el } );\n\t\t\t} );\n\n\t\t\t// Lazy loading iframes\n\t\t\tqueryAll( element, 'iframe[data-src]' ).forEach( el => {\n\t\t\t\tif( closest( el, '.fragment' ) && !closest( el, '.fragment.visible' ) ) {\n\t\t\t\t\treturn;\n\t\t\t\t}\n\n\t\t\t\tif( el.getAttribute( 'src' ) !== el.getAttribute( 'data-src' ) ) {\n\t\t\t\t\tel.removeEventListener( 'load', this.startEmbeddedIframe ); // remove first to avoid dupes\n\t\t\t\t\tel.addEventListener( 'load', this.startEmbeddedIframe );\n\t\t\t\t\tel.setAttribute( 'src', el.getAttribute( 'data-src' ) );\n\t\t\t\t}\n\t\t\t} );\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Starts playing an embedded video/audio element after\n\t * it has finished loading.\n\t *\n\t * @param {object} event\n\t */\n\tstartEmbeddedMedia( event ) {\n\n\t\tlet isAttachedToDOM = !!closest( event.target, 'html' ),\n\t\t\tisVisible \t\t= !!closest( event.target, '.present' );\n\n\t\tif( isAttachedToDOM && isVisible ) {\n\t\t\tevent.target.currentTime = 0;\n\t\t\tevent.target.play();\n\t\t}\n\n\t\tevent.target.removeEventListener( 'loadeddata', this.startEmbeddedMedia );\n\n\t}\n\n\t/**\n\t * \"Starts\" the content of an embedded iframe using the\n\t * postMessage API.\n\t *\n\t * @param {object} event\n\t */\n\tstartEmbeddedIframe( event ) {\n\n\t\tlet iframe = event.target;\n\n\t\tif( iframe && iframe.contentWindow ) {\n\n\t\t\tlet isAttachedToDOM = !!closest( event.target, 'html' ),\n\t\t\t\tisVisible \t\t= !!closest( event.target, '.present' );\n\n\t\t\tif( isAttachedToDOM && isVisible ) {\n\n\t\t\t\t// Prefer an explicit global autoplay setting\n\t\t\t\tlet autoplay = this.Reveal.getConfig().autoPlayMedia;\n\n\t\t\t\t// If no global setting is available, fall back on the element's\n\t\t\t\t// own autoplay setting\n\t\t\t\tif( typeof autoplay !== 'boolean' ) {\n\t\t\t\t\tautoplay = iframe.hasAttribute( 'data-autoplay' ) || !!closest( iframe, '.slide-background' );\n\t\t\t\t}\n\n\t\t\t\t// YouTube postMessage API\n\t\t\t\tif( /youtube\\.com\\/embed\\//.test( iframe.getAttribute( 'src' ) ) && autoplay ) {\n\t\t\t\t\tiframe.contentWindow.postMessage( '{\"event\":\"command\",\"func\":\"playVideo\",\"args\":\"\"}', '*' );\n\t\t\t\t}\n\t\t\t\t// Vimeo postMessage API\n\t\t\t\telse if( /player\\.vimeo\\.com\\//.test( iframe.getAttribute( 'src' ) ) && autoplay ) {\n\t\t\t\t\tiframe.contentWindow.postMessage( '{\"method\":\"play\"}', '*' );\n\t\t\t\t}\n\t\t\t\t// Generic postMessage API\n\t\t\t\telse {\n\t\t\t\t\tiframe.contentWindow.postMessage( 'slide:start', '*' );\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Stop playback of any embedded content inside of\n\t * the targeted slide.\n\t *\n\t * @param {HTMLElement} element\n\t */\n\tstopEmbeddedContent( element, options = {} ) {\n\n\t\toptions = extend( {\n\t\t\t// Defaults\n\t\t\tunloadIframes: true\n\t\t}, options );\n\n\t\tif( element && element.parentNode ) {\n\t\t\t// HTML5 media elements\n\t\t\tqueryAll( element, 'video, audio' ).forEach( el => {\n\t\t\t\tif( !el.hasAttribute( 'data-ignore' ) && typeof el.pause === 'function' ) {\n\t\t\t\t\tel.setAttribute('data-paused-by-reveal', '');\n\t\t\t\t\tel.pause();\n\t\t\t\t}\n\t\t\t} );\n\n\t\t\t// Generic postMessage API for non-lazy loaded iframes\n\t\t\tqueryAll( element, 'iframe' ).forEach( el => {\n\t\t\t\tif( el.contentWindow ) el.contentWindow.postMessage( 'slide:stop', '*' );\n\t\t\t\tel.removeEventListener( 'load', this.startEmbeddedIframe );\n\t\t\t});\n\n\t\t\t// YouTube postMessage API\n\t\t\tqueryAll( element, 'iframe[src*=\"youtube.com/embed/\"]' ).forEach( el => {\n\t\t\t\tif( !el.hasAttribute( 'data-ignore' ) && el.contentWindow && typeof el.contentWindow.postMessage === 'function' ) {\n\t\t\t\t\tel.contentWindow.postMessage( '{\"event\":\"command\",\"func\":\"pauseVideo\",\"args\":\"\"}', '*' );\n\t\t\t\t}\n\t\t\t});\n\n\t\t\t// Vimeo postMessage API\n\t\t\tqueryAll( element, 'iframe[src*=\"player.vimeo.com/\"]' ).forEach( el => {\n\t\t\t\tif( !el.hasAttribute( 'data-ignore' ) && el.contentWindow && typeof el.contentWindow.postMessage === 'function' ) {\n\t\t\t\t\tel.contentWindow.postMessage( '{\"method\":\"pause\"}', '*' );\n\t\t\t\t}\n\t\t\t});\n\n\t\t\tif( options.unloadIframes === true ) {\n\t\t\t\t// Unload lazy-loaded iframes\n\t\t\t\tqueryAll( element, 'iframe[data-src]' ).forEach( el => {\n\t\t\t\t\t// Only removing the src doesn't actually unload the frame\n\t\t\t\t\t// in all browsers (Firefox) so we set it to blank first\n\t\t\t\t\tel.setAttribute( 'src', 'about:blank' );\n\t\t\t\t\tel.removeAttribute( 'src' );\n\t\t\t\t} );\n\t\t\t}\n\t\t}\n\n\t}\n\n}\n","/**\n * Handles the display of reveal.js' optional slide number.\n */\nexport default class SlideNumber {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t}\n\n\trender() {\n\n\t\tthis.element = document.createElement( 'div' );\n\t\tthis.element.className = 'slide-number';\n\t\tthis.Reveal.getRevealElement().appendChild( this.element );\n\n\t}\n\n\t/**\n\t * Called when the reveal.js config is updated.\n\t */\n\tconfigure( config, oldConfig ) {\n\n\t\tlet slideNumberDisplay = 'none';\n\t\tif( config.slideNumber && !this.Reveal.isPrintingPDF() ) {\n\t\t\tif( config.showSlideNumber === 'all' ) {\n\t\t\t\tslideNumberDisplay = 'block';\n\t\t\t}\n\t\t\telse if( config.showSlideNumber === 'speaker' && this.Reveal.isSpeakerNotes() ) {\n\t\t\t\tslideNumberDisplay = 'block';\n\t\t\t}\n\t\t}\n\n\t\tthis.element.style.display = slideNumberDisplay;\n\n\t}\n\n\t/**\n\t * Updates the slide number to match the current slide.\n\t */\n\tupdate() {\n\n\t\t// Update slide number if enabled\n\t\tif( this.Reveal.getConfig().slideNumber && this.element ) {\n\t\t\tthis.element.innerHTML = this.getSlideNumber();\n\t\t}\n\n\t}\n\n\t/**\n\t * Returns the HTML string corresponding to the current slide\n\t * number, including formatting.\n\t */\n\tgetSlideNumber( slide = this.Reveal.getCurrentSlide() ) {\n\n\t\tlet config = this.Reveal.getConfig();\n\t\tlet value;\n\t\tlet format = 'h.v';\n\n\t\tif ( typeof config.slideNumber === 'function' ) {\n\t\t\tvalue = config.slideNumber( slide );\n\t\t} else {\n\t\t\t// Check if a custom number format is available\n\t\t\tif( typeof config.slideNumber === 'string' ) {\n\t\t\t\tformat = config.slideNumber;\n\t\t\t}\n\n\t\t\t// If there are ONLY vertical slides in this deck, always use\n\t\t\t// a flattened slide number\n\t\t\tif( !/c/.test( format ) && this.Reveal.getHorizontalSlides().length === 1 ) {\n\t\t\t\tformat = 'c';\n\t\t\t}\n\n\t\t\t// Offset the current slide number by 1 to make it 1-indexed\n\t\t\tlet horizontalOffset = slide && slide.dataset.visibility === 'uncounted' ? 0 : 1;\n\n\t\t\tvalue = [];\n\t\t\tswitch( format ) {\n\t\t\t\tcase 'c':\n\t\t\t\t\tvalue.push( this.Reveal.getSlidePastCount( slide ) + horizontalOffset );\n\t\t\t\t\tbreak;\n\t\t\t\tcase 'c/t':\n\t\t\t\t\tvalue.push( this.Reveal.getSlidePastCount( slide ) + horizontalOffset, '/', this.Reveal.getTotalSlides() );\n\t\t\t\t\tbreak;\n\t\t\t\tdefault:\n\t\t\t\t\tlet indices = this.Reveal.getIndices( slide );\n\t\t\t\t\tvalue.push( indices.h + horizontalOffset );\n\t\t\t\t\tlet sep = format === 'h/v' ? '/' : '.';\n\t\t\t\t\tif( this.Reveal.isVerticalSlide( slide ) ) value.push( sep, indices.v + 1 );\n\t\t\t}\n\t\t}\n\n\t\tlet url = '#' + this.Reveal.location.getHash( slide );\n\t\treturn this.formatNumber( value[0], value[1], value[2], url );\n\n\t}\n\n\t/**\n\t * Applies HTML formatting to a slide number before it's\n\t * written to the DOM.\n\t *\n\t * @param {number} a Current slide\n\t * @param {string} delimiter Character to separate slide numbers\n\t * @param {(number|*)} b Total slides\n\t * @param {HTMLElement} [url='#'+locationHash()] The url to link to\n\t * @return {string} HTML string fragment\n\t */\n\tformatNumber( a, delimiter, b, url = '#' + this.Reveal.location.getHash() ) {\n\n\t\tif( typeof b === 'number' && !isNaN( b ) ) {\n\t\t\treturn `\n\t\t\t\t\t${a}\n\t\t\t\t\t${delimiter}\n\t\t\t\t\t${b}\n\t\t\t\t\t`;\n\t\t}\n\t\telse {\n\t\t\treturn `\n\t\t\t\t\t${a}\n\t\t\t\t\t`;\n\t\t}\n\n\t}\n\n\tdestroy() {\n\n\t\tthis.element.remove();\n\n\t}\n\n}","/**\n * Converts various color input formats to an {r:0,g:0,b:0} object.\n *\n * @param {string} color The string representation of a color\n * @example\n * colorToRgb('#000');\n * @example\n * colorToRgb('#000000');\n * @example\n * colorToRgb('rgb(0,0,0)');\n * @example\n * colorToRgb('rgba(0,0,0)');\n *\n * @return {{r: number, g: number, b: number, [a]: number}|null}\n */\nexport const colorToRgb = ( color ) => {\n\n\tlet hex3 = color.match( /^#([0-9a-f]{3})$/i );\n\tif( hex3 && hex3[1] ) {\n\t\thex3 = hex3[1];\n\t\treturn {\n\t\t\tr: parseInt( hex3.charAt( 0 ), 16 ) * 0x11,\n\t\t\tg: parseInt( hex3.charAt( 1 ), 16 ) * 0x11,\n\t\t\tb: parseInt( hex3.charAt( 2 ), 16 ) * 0x11\n\t\t};\n\t}\n\n\tlet hex6 = color.match( /^#([0-9a-f]{6})$/i );\n\tif( hex6 && hex6[1] ) {\n\t\thex6 = hex6[1];\n\t\treturn {\n\t\t\tr: parseInt( hex6.slice( 0, 2 ), 16 ),\n\t\t\tg: parseInt( hex6.slice( 2, 4 ), 16 ),\n\t\t\tb: parseInt( hex6.slice( 4, 6 ), 16 )\n\t\t};\n\t}\n\n\tlet rgb = color.match( /^rgb\\s*\\(\\s*(\\d+)\\s*,\\s*(\\d+)\\s*,\\s*(\\d+)\\s*\\)$/i );\n\tif( rgb ) {\n\t\treturn {\n\t\t\tr: parseInt( rgb[1], 10 ),\n\t\t\tg: parseInt( rgb[2], 10 ),\n\t\t\tb: parseInt( rgb[3], 10 )\n\t\t};\n\t}\n\n\tlet rgba = color.match( /^rgba\\s*\\(\\s*(\\d+)\\s*,\\s*(\\d+)\\s*,\\s*(\\d+)\\s*\\,\\s*([\\d]+|[\\d]*.[\\d]+)\\s*\\)$/i );\n\tif( rgba ) {\n\t\treturn {\n\t\t\tr: parseInt( rgba[1], 10 ),\n\t\t\tg: parseInt( rgba[2], 10 ),\n\t\t\tb: parseInt( rgba[3], 10 ),\n\t\t\ta: parseFloat( rgba[4] )\n\t\t};\n\t}\n\n\treturn null;\n\n}\n\n/**\n * Calculates brightness on a scale of 0-255.\n *\n * @param {string} color See colorToRgb for supported formats.\n * @see {@link colorToRgb}\n */\nexport const colorBrightness = ( color ) => {\n\n\tif( typeof color === 'string' ) color = colorToRgb( color );\n\n\tif( color ) {\n\t\treturn ( color.r * 299 + color.g * 587 + color.b * 114 ) / 1000;\n\t}\n\n\treturn null;\n\n}","import { queryAll } from '../utils/util.js'\nimport { colorToRgb, colorBrightness } from '../utils/color.js'\n\n/**\n * Creates and updates slide backgrounds.\n */\nexport default class Backgrounds {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t}\n\n\trender() {\n\n\t\tthis.element = document.createElement( 'div' );\n\t\tthis.element.className = 'backgrounds';\n\t\tthis.Reveal.getRevealElement().appendChild( this.element );\n\n\t}\n\n\t/**\n\t * Creates the slide background elements and appends them\n\t * to the background container. One element is created per\n\t * slide no matter if the given slide has visible background.\n\t */\n\tcreate() {\n\n\t\t// Clear prior backgrounds\n\t\tthis.element.innerHTML = '';\n\t\tthis.element.classList.add( 'no-transition' );\n\n\t\t// Iterate over all horizontal slides\n\t\tthis.Reveal.getHorizontalSlides().forEach( slideh => {\n\n\t\t\tlet backgroundStack = this.createBackground( slideh, this.element );\n\n\t\t\t// Iterate over all vertical slides\n\t\t\tqueryAll( slideh, 'section' ).forEach( slidev => {\n\n\t\t\t\tthis.createBackground( slidev, backgroundStack );\n\n\t\t\t\tbackgroundStack.classList.add( 'stack' );\n\n\t\t\t} );\n\n\t\t} );\n\n\t\t// Add parallax background if specified\n\t\tif( this.Reveal.getConfig().parallaxBackgroundImage ) {\n\n\t\t\tthis.element.style.backgroundImage = 'url(\"' + this.Reveal.getConfig().parallaxBackgroundImage + '\")';\n\t\t\tthis.element.style.backgroundSize = this.Reveal.getConfig().parallaxBackgroundSize;\n\t\t\tthis.element.style.backgroundRepeat = this.Reveal.getConfig().parallaxBackgroundRepeat;\n\t\t\tthis.element.style.backgroundPosition = this.Reveal.getConfig().parallaxBackgroundPosition;\n\n\t\t\t// Make sure the below properties are set on the element - these properties are\n\t\t\t// needed for proper transitions to be set on the element via CSS. To remove\n\t\t\t// annoying background slide-in effect when the presentation starts, apply\n\t\t\t// these properties after short time delay\n\t\t\tsetTimeout( () => {\n\t\t\t\tthis.Reveal.getRevealElement().classList.add( 'has-parallax-background' );\n\t\t\t}, 1 );\n\n\t\t}\n\t\telse {\n\n\t\t\tthis.element.style.backgroundImage = '';\n\t\t\tthis.Reveal.getRevealElement().classList.remove( 'has-parallax-background' );\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Creates a background for the given slide.\n\t *\n\t * @param {HTMLElement} slide\n\t * @param {HTMLElement} container The element that the background\n\t * should be appended to\n\t * @return {HTMLElement} New background div\n\t */\n\tcreateBackground( slide, container ) {\n\n\t\t// Main slide background element\n\t\tlet element = document.createElement( 'div' );\n\t\telement.className = 'slide-background ' + slide.className.replace( /present|past|future/, '' );\n\n\t\t// Inner background element that wraps images/videos/iframes\n\t\tlet contentElement = document.createElement( 'div' );\n\t\tcontentElement.className = 'slide-background-content';\n\n\t\telement.appendChild( contentElement );\n\t\tcontainer.appendChild( element );\n\n\t\tslide.slideBackgroundElement = element;\n\t\tslide.slideBackgroundContentElement = contentElement;\n\n\t\t// Syncs the background to reflect all current background settings\n\t\tthis.sync( slide );\n\n\t\treturn element;\n\n\t}\n\n\t/**\n\t * Renders all of the visual properties of a slide background\n\t * based on the various background attributes.\n\t *\n\t * @param {HTMLElement} slide\n\t */\n\tsync( slide ) {\n\n\t\tconst element = slide.slideBackgroundElement,\n\t\t\tcontentElement = slide.slideBackgroundContentElement;\n\n\t\tconst data = {\n\t\t\tbackground: slide.getAttribute( 'data-background' ),\n\t\t\tbackgroundSize: slide.getAttribute( 'data-background-size' ),\n\t\t\tbackgroundImage: slide.getAttribute( 'data-background-image' ),\n\t\t\tbackgroundVideo: slide.getAttribute( 'data-background-video' ),\n\t\t\tbackgroundIframe: slide.getAttribute( 'data-background-iframe' ),\n\t\t\tbackgroundColor: slide.getAttribute( 'data-background-color' ),\n\t\t\tbackgroundRepeat: slide.getAttribute( 'data-background-repeat' ),\n\t\t\tbackgroundPosition: slide.getAttribute( 'data-background-position' ),\n\t\t\tbackgroundTransition: slide.getAttribute( 'data-background-transition' ),\n\t\t\tbackgroundOpacity: slide.getAttribute( 'data-background-opacity' ),\n\t\t};\n\n\t\tconst dataPreload = slide.hasAttribute( 'data-preload' );\n\n\t\t// Reset the prior background state in case this is not the\n\t\t// initial sync\n\t\tslide.classList.remove( 'has-dark-background' );\n\t\tslide.classList.remove( 'has-light-background' );\n\n\t\telement.removeAttribute( 'data-loaded' );\n\t\telement.removeAttribute( 'data-background-hash' );\n\t\telement.removeAttribute( 'data-background-size' );\n\t\telement.removeAttribute( 'data-background-transition' );\n\t\telement.style.backgroundColor = '';\n\n\t\tcontentElement.style.backgroundSize = '';\n\t\tcontentElement.style.backgroundRepeat = '';\n\t\tcontentElement.style.backgroundPosition = '';\n\t\tcontentElement.style.backgroundImage = '';\n\t\tcontentElement.style.opacity = '';\n\t\tcontentElement.innerHTML = '';\n\n\t\tif( data.background ) {\n\t\t\t// Auto-wrap image urls in url(...)\n\t\t\tif( /^(http|file|\\/\\/)/gi.test( data.background ) || /\\.(svg|png|jpg|jpeg|gif|bmp)([?#\\s]|$)/gi.test( data.background ) ) {\n\t\t\t\tslide.setAttribute( 'data-background-image', data.background );\n\t\t\t}\n\t\t\telse {\n\t\t\t\telement.style.background = data.background;\n\t\t\t}\n\t\t}\n\n\t\t// Create a hash for this combination of background settings.\n\t\t// This is used to determine when two slide backgrounds are\n\t\t// the same.\n\t\tif( data.background || data.backgroundColor || data.backgroundImage || data.backgroundVideo || data.backgroundIframe ) {\n\t\t\telement.setAttribute( 'data-background-hash', data.background +\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tdata.backgroundSize +\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tdata.backgroundImage +\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tdata.backgroundVideo +\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tdata.backgroundIframe +\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tdata.backgroundColor +\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tdata.backgroundRepeat +\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tdata.backgroundPosition +\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tdata.backgroundTransition +\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tdata.backgroundOpacity );\n\t\t}\n\n\t\t// Additional and optional background properties\n\t\tif( data.backgroundSize ) element.setAttribute( 'data-background-size', data.backgroundSize );\n\t\tif( data.backgroundColor ) element.style.backgroundColor = data.backgroundColor;\n\t\tif( data.backgroundTransition ) element.setAttribute( 'data-background-transition', data.backgroundTransition );\n\n\t\tif( dataPreload ) element.setAttribute( 'data-preload', '' );\n\n\t\t// Background image options are set on the content wrapper\n\t\tif( data.backgroundSize ) contentElement.style.backgroundSize = data.backgroundSize;\n\t\tif( data.backgroundRepeat ) contentElement.style.backgroundRepeat = data.backgroundRepeat;\n\t\tif( data.backgroundPosition ) contentElement.style.backgroundPosition = data.backgroundPosition;\n\t\tif( data.backgroundOpacity ) contentElement.style.opacity = data.backgroundOpacity;\n\n\t\t// If this slide has a background color, we add a class that\n\t\t// signals if it is light or dark. If the slide has no background\n\t\t// color, no class will be added\n\t\tlet contrastColor = data.backgroundColor;\n\n\t\t// If no bg color was found, or it cannot be converted by colorToRgb, check the computed background\n\t\tif( !contrastColor || !colorToRgb( contrastColor ) ) {\n\t\t\tlet computedBackgroundStyle = window.getComputedStyle( element );\n\t\t\tif( computedBackgroundStyle && computedBackgroundStyle.backgroundColor ) {\n\t\t\t\tcontrastColor = computedBackgroundStyle.backgroundColor;\n\t\t\t}\n\t\t}\n\n\t\tif( contrastColor ) {\n\t\t\tconst rgb = colorToRgb( contrastColor );\n\n\t\t\t// Ignore fully transparent backgrounds. Some browsers return\n\t\t\t// rgba(0,0,0,0) when reading the computed background color of\n\t\t\t// an element with no background\n\t\t\tif( rgb && rgb.a !== 0 ) {\n\t\t\t\tif( colorBrightness( contrastColor ) < 128 ) {\n\t\t\t\t\tslide.classList.add( 'has-dark-background' );\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tslide.classList.add( 'has-light-background' );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t}\n\n\t/**\n\t * Updates the background elements to reflect the current\n\t * slide.\n\t *\n\t * @param {boolean} includeAll If true, the backgrounds of\n\t * all vertical slides (not just the present) will be updated.\n\t */\n\tupdate( includeAll = false ) {\n\n\t\tlet currentSlide = this.Reveal.getCurrentSlide();\n\t\tlet indices = this.Reveal.getIndices();\n\n\t\tlet currentBackground = null;\n\n\t\t// Reverse past/future classes when in RTL mode\n\t\tlet horizontalPast = this.Reveal.getConfig().rtl ? 'future' : 'past',\n\t\t\thorizontalFuture = this.Reveal.getConfig().rtl ? 'past' : 'future';\n\n\t\t// Update the classes of all backgrounds to match the\n\t\t// states of their slides (past/present/future)\n\t\tArray.from( this.element.childNodes ).forEach( ( backgroundh, h ) => {\n\n\t\t\tbackgroundh.classList.remove( 'past', 'present', 'future' );\n\n\t\t\tif( h < indices.h ) {\n\t\t\t\tbackgroundh.classList.add( horizontalPast );\n\t\t\t}\n\t\t\telse if ( h > indices.h ) {\n\t\t\t\tbackgroundh.classList.add( horizontalFuture );\n\t\t\t}\n\t\t\telse {\n\t\t\t\tbackgroundh.classList.add( 'present' );\n\n\t\t\t\t// Store a reference to the current background element\n\t\t\t\tcurrentBackground = backgroundh;\n\t\t\t}\n\n\t\t\tif( includeAll || h === indices.h ) {\n\t\t\t\tqueryAll( backgroundh, '.slide-background' ).forEach( ( backgroundv, v ) => {\n\n\t\t\t\t\tbackgroundv.classList.remove( 'past', 'present', 'future' );\n\n\t\t\t\t\tif( v < indices.v ) {\n\t\t\t\t\t\tbackgroundv.classList.add( 'past' );\n\t\t\t\t\t}\n\t\t\t\t\telse if ( v > indices.v ) {\n\t\t\t\t\t\tbackgroundv.classList.add( 'future' );\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tbackgroundv.classList.add( 'present' );\n\n\t\t\t\t\t\t// Only if this is the present horizontal and vertical slide\n\t\t\t\t\t\tif( h === indices.h ) currentBackground = backgroundv;\n\t\t\t\t\t}\n\n\t\t\t\t} );\n\t\t\t}\n\n\t\t} );\n\n\t\t// Stop content inside of previous backgrounds\n\t\tif( this.previousBackground ) {\n\n\t\t\tthis.Reveal.slideContent.stopEmbeddedContent( this.previousBackground, { unloadIframes: !this.Reveal.slideContent.shouldPreload( this.previousBackground ) } );\n\n\t\t}\n\n\t\t// Start content in the current background\n\t\tif( currentBackground ) {\n\n\t\t\tthis.Reveal.slideContent.startEmbeddedContent( currentBackground );\n\n\t\t\tlet currentBackgroundContent = currentBackground.querySelector( '.slide-background-content' );\n\t\t\tif( currentBackgroundContent ) {\n\n\t\t\t\tlet backgroundImageURL = currentBackgroundContent.style.backgroundImage || '';\n\n\t\t\t\t// Restart GIFs (doesn't work in Firefox)\n\t\t\t\tif( /\\.gif/i.test( backgroundImageURL ) ) {\n\t\t\t\t\tcurrentBackgroundContent.style.backgroundImage = '';\n\t\t\t\t\twindow.getComputedStyle( currentBackgroundContent ).opacity;\n\t\t\t\t\tcurrentBackgroundContent.style.backgroundImage = backgroundImageURL;\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\t// Don't transition between identical backgrounds. This\n\t\t\t// prevents unwanted flicker.\n\t\t\tlet previousBackgroundHash = this.previousBackground ? this.previousBackground.getAttribute( 'data-background-hash' ) : null;\n\t\t\tlet currentBackgroundHash = currentBackground.getAttribute( 'data-background-hash' );\n\t\t\tif( currentBackgroundHash && currentBackgroundHash === previousBackgroundHash && currentBackground !== this.previousBackground ) {\n\t\t\t\tthis.element.classList.add( 'no-transition' );\n\t\t\t}\n\n\t\t\tthis.previousBackground = currentBackground;\n\n\t\t}\n\n\t\t// If there's a background brightness flag for this slide,\n\t\t// bubble it to the .reveal container\n\t\tif( currentSlide ) {\n\t\t\t[ 'has-light-background', 'has-dark-background' ].forEach( classToBubble => {\n\t\t\t\tif( currentSlide.classList.contains( classToBubble ) ) {\n\t\t\t\t\tthis.Reveal.getRevealElement().classList.add( classToBubble );\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tthis.Reveal.getRevealElement().classList.remove( classToBubble );\n\t\t\t\t}\n\t\t\t}, this );\n\t\t}\n\n\t\t// Allow the first background to apply without transition\n\t\tsetTimeout( () => {\n\t\t\tthis.element.classList.remove( 'no-transition' );\n\t\t}, 1 );\n\n\t}\n\n\t/**\n\t * Updates the position of the parallax background based\n\t * on the current slide index.\n\t */\n\tupdateParallax() {\n\n\t\tlet indices = this.Reveal.getIndices();\n\n\t\tif( this.Reveal.getConfig().parallaxBackgroundImage ) {\n\n\t\t\tlet horizontalSlides = this.Reveal.getHorizontalSlides(),\n\t\t\t\tverticalSlides = this.Reveal.getVerticalSlides();\n\n\t\t\tlet backgroundSize = this.element.style.backgroundSize.split( ' ' ),\n\t\t\t\tbackgroundWidth, backgroundHeight;\n\n\t\t\tif( backgroundSize.length === 1 ) {\n\t\t\t\tbackgroundWidth = backgroundHeight = parseInt( backgroundSize[0], 10 );\n\t\t\t}\n\t\t\telse {\n\t\t\t\tbackgroundWidth = parseInt( backgroundSize[0], 10 );\n\t\t\t\tbackgroundHeight = parseInt( backgroundSize[1], 10 );\n\t\t\t}\n\n\t\t\tlet slideWidth = this.element.offsetWidth,\n\t\t\t\thorizontalSlideCount = horizontalSlides.length,\n\t\t\t\thorizontalOffsetMultiplier,\n\t\t\t\thorizontalOffset;\n\n\t\t\tif( typeof this.Reveal.getConfig().parallaxBackgroundHorizontal === 'number' ) {\n\t\t\t\thorizontalOffsetMultiplier = this.Reveal.getConfig().parallaxBackgroundHorizontal;\n\t\t\t}\n\t\t\telse {\n\t\t\t\thorizontalOffsetMultiplier = horizontalSlideCount > 1 ? ( backgroundWidth - slideWidth ) / ( horizontalSlideCount-1 ) : 0;\n\t\t\t}\n\n\t\t\thorizontalOffset = horizontalOffsetMultiplier * indices.h * -1;\n\n\t\t\tlet slideHeight = this.element.offsetHeight,\n\t\t\t\tverticalSlideCount = verticalSlides.length,\n\t\t\t\tverticalOffsetMultiplier,\n\t\t\t\tverticalOffset;\n\n\t\t\tif( typeof this.Reveal.getConfig().parallaxBackgroundVertical === 'number' ) {\n\t\t\t\tverticalOffsetMultiplier = this.Reveal.getConfig().parallaxBackgroundVertical;\n\t\t\t}\n\t\t\telse {\n\t\t\t\tverticalOffsetMultiplier = ( backgroundHeight - slideHeight ) / ( verticalSlideCount-1 );\n\t\t\t}\n\n\t\t\tverticalOffset = verticalSlideCount > 0 ? verticalOffsetMultiplier * indices.v : 0;\n\n\t\t\tthis.element.style.backgroundPosition = horizontalOffset + 'px ' + -verticalOffset + 'px';\n\n\t\t}\n\n\t}\n\n\tdestroy() {\n\n\t\tthis.element.remove();\n\n\t}\n\n}\n","\nexport const SLIDES_SELECTOR = '.slides section';\nexport const HORIZONTAL_SLIDES_SELECTOR = '.slides>section';\nexport const VERTICAL_SLIDES_SELECTOR = '.slides>section.present>section';\n\n// Methods that may not be invoked via the postMessage API\nexport const POST_MESSAGE_METHOD_BLACKLIST = /registerPlugin|registerKeyboardShortcut|addKeyBinding|addEventListener/;\n\n// Regex for retrieving the fragment style from a class attribute\nexport const FRAGMENT_STYLE_REGEX = /fade-(down|up|right|left|out|in-then-out|in-then-semi-out)|semi-fade-out|current-visible|shrink|grow/;","import { queryAll, extend, createStyleSheet, matches, closest } from '../utils/util.js'\nimport { FRAGMENT_STYLE_REGEX } from '../utils/constants.js'\n\n// Counter used to generate unique IDs for auto-animated elements\nlet autoAnimateCounter = 0;\n\n/**\n * Automatically animates matching elements across\n * slides with the [data-auto-animate] attribute.\n */\nexport default class AutoAnimate {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t}\n\n\t/**\n\t * Runs an auto-animation between the given slides.\n\t *\n\t * @param {HTMLElement} fromSlide\n\t * @param {HTMLElement} toSlide\n\t */\n\trun( fromSlide, toSlide ) {\n\n\t\t// Clean up after prior animations\n\t\tthis.reset();\n\n\t\tlet allSlides = this.Reveal.getSlides();\n\t\tlet toSlideIndex = allSlides.indexOf( toSlide );\n\t\tlet fromSlideIndex = allSlides.indexOf( fromSlide );\n\n\t\t// Ensure that both slides are auto-animate targets with the same data-auto-animate-id value\n\t\t// (including null if absent on both) and that data-auto-animate-restart isn't set on the\n\t\t// physically latter slide (independent of slide direction)\n\t\tif( fromSlide.hasAttribute( 'data-auto-animate' ) && toSlide.hasAttribute( 'data-auto-animate' )\n\t\t\t\t&& fromSlide.getAttribute( 'data-auto-animate-id' ) === toSlide.getAttribute( 'data-auto-animate-id' ) \n\t\t\t\t&& !( toSlideIndex > fromSlideIndex ? toSlide : fromSlide ).hasAttribute( 'data-auto-animate-restart' ) ) {\n\n\t\t\t// Create a new auto-animate sheet\n\t\t\tthis.autoAnimateStyleSheet = this.autoAnimateStyleSheet || createStyleSheet();\n\n\t\t\tlet animationOptions = this.getAutoAnimateOptions( toSlide );\n\n\t\t\t// Set our starting state\n\t\t\tfromSlide.dataset.autoAnimate = 'pending';\n\t\t\ttoSlide.dataset.autoAnimate = 'pending';\n\n\t\t\t// Flag the navigation direction, needed for fragment buildup\n\t\t\tanimationOptions.slideDirection = toSlideIndex > fromSlideIndex ? 'forward' : 'backward';\n\n\t\t\t// Inject our auto-animate styles for this transition\n\t\t\tlet css = this.getAutoAnimatableElements( fromSlide, toSlide ).map( elements => {\n\t\t\t\treturn this.autoAnimateElements( elements.from, elements.to, elements.options || {}, animationOptions, autoAnimateCounter++ );\n\t\t\t} );\n\n\t\t\t// Animate unmatched elements, if enabled\n\t\t\tif( toSlide.dataset.autoAnimateUnmatched !== 'false' && this.Reveal.getConfig().autoAnimateUnmatched === true ) {\n\n\t\t\t\t// Our default timings for unmatched elements\n\t\t\t\tlet defaultUnmatchedDuration = animationOptions.duration * 0.8,\n\t\t\t\t\tdefaultUnmatchedDelay = animationOptions.duration * 0.2;\n\n\t\t\t\tthis.getUnmatchedAutoAnimateElements( toSlide ).forEach( unmatchedElement => {\n\n\t\t\t\t\tlet unmatchedOptions = this.getAutoAnimateOptions( unmatchedElement, animationOptions );\n\t\t\t\t\tlet id = 'unmatched';\n\n\t\t\t\t\t// If there is a duration or delay set specifically for this\n\t\t\t\t\t// element our unmatched elements should adhere to those\n\t\t\t\t\tif( unmatchedOptions.duration !== animationOptions.duration || unmatchedOptions.delay !== animationOptions.delay ) {\n\t\t\t\t\t\tid = 'unmatched-' + autoAnimateCounter++;\n\t\t\t\t\t\tcss.push( `[data-auto-animate=\"running\"] [data-auto-animate-target=\"${id}\"] { transition: opacity ${unmatchedOptions.duration}s ease ${unmatchedOptions.delay}s; }` );\n\t\t\t\t\t}\n\n\t\t\t\t\tunmatchedElement.dataset.autoAnimateTarget = id;\n\n\t\t\t\t}, this );\n\n\t\t\t\t// Our default transition for unmatched elements\n\t\t\t\tcss.push( `[data-auto-animate=\"running\"] [data-auto-animate-target=\"unmatched\"] { transition: opacity ${defaultUnmatchedDuration}s ease ${defaultUnmatchedDelay}s; }` );\n\n\t\t\t}\n\n\t\t\t// Setting the whole chunk of CSS at once is the most\n\t\t\t// efficient way to do this. Using sheet.insertRule\n\t\t\t// is multiple factors slower.\n\t\t\tthis.autoAnimateStyleSheet.innerHTML = css.join( '' );\n\n\t\t\t// Start the animation next cycle\n\t\t\trequestAnimationFrame( () => {\n\t\t\t\tif( this.autoAnimateStyleSheet ) {\n\t\t\t\t\t// This forces our newly injected styles to be applied in Firefox\n\t\t\t\t\tgetComputedStyle( this.autoAnimateStyleSheet ).fontWeight;\n\n\t\t\t\t\ttoSlide.dataset.autoAnimate = 'running';\n\t\t\t\t}\n\t\t\t} );\n\n\t\t\tthis.Reveal.dispatchEvent({\n\t\t\t\ttype: 'autoanimate',\n\t\t\t\tdata: {\n\t\t\t\t\tfromSlide,\n\t\t\t\t\ttoSlide,\n\t\t\t\t\tsheet: this.autoAnimateStyleSheet\n\t\t\t\t}\n\t\t\t});\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Rolls back all changes that we've made to the DOM so\n\t * that as part of animating.\n\t */\n\treset() {\n\n\t\t// Reset slides\n\t\tqueryAll( this.Reveal.getRevealElement(), '[data-auto-animate]:not([data-auto-animate=\"\"])' ).forEach( element => {\n\t\t\telement.dataset.autoAnimate = '';\n\t\t} );\n\n\t\t// Reset elements\n\t\tqueryAll( this.Reveal.getRevealElement(), '[data-auto-animate-target]' ).forEach( element => {\n\t\t\tdelete element.dataset.autoAnimateTarget;\n\t\t} );\n\n\t\t// Remove the animation sheet\n\t\tif( this.autoAnimateStyleSheet && this.autoAnimateStyleSheet.parentNode ) {\n\t\t\tthis.autoAnimateStyleSheet.parentNode.removeChild( this.autoAnimateStyleSheet );\n\t\t\tthis.autoAnimateStyleSheet = null;\n\t\t}\n\n\t}\n\n\t/**\n\t * Creates a FLIP animation where the `to` element starts out\n\t * in the `from` element position and animates to its original\n\t * state.\n\t *\n\t * @param {HTMLElement} from\n\t * @param {HTMLElement} to\n\t * @param {Object} elementOptions Options for this element pair\n\t * @param {Object} animationOptions Options set at the slide level\n\t * @param {String} id Unique ID that we can use to identify this\n\t * auto-animate element in the DOM\n\t */\n\tautoAnimateElements( from, to, elementOptions, animationOptions, id ) {\n\n\t\t// 'from' elements are given a data-auto-animate-target with no value,\n\t\t// 'to' elements are are given a data-auto-animate-target with an ID\n\t\tfrom.dataset.autoAnimateTarget = '';\n\t\tto.dataset.autoAnimateTarget = id;\n\n\t\t// Each element may override any of the auto-animate options\n\t\t// like transition easing, duration and delay via data-attributes\n\t\tlet options = this.getAutoAnimateOptions( to, animationOptions );\n\n\t\t// If we're using a custom element matcher the element options\n\t\t// may contain additional transition overrides\n\t\tif( typeof elementOptions.delay !== 'undefined' ) options.delay = elementOptions.delay;\n\t\tif( typeof elementOptions.duration !== 'undefined' ) options.duration = elementOptions.duration;\n\t\tif( typeof elementOptions.easing !== 'undefined' ) options.easing = elementOptions.easing;\n\n\t\tlet fromProps = this.getAutoAnimatableProperties( 'from', from, elementOptions ),\n\t\t\ttoProps = this.getAutoAnimatableProperties( 'to', to, elementOptions );\n\n\t\t// Maintain fragment visibility for matching elements when\n\t\t// we're navigating forwards, this way the viewer won't need\n\t\t// to step through the same fragments twice\n\t\tif( to.classList.contains( 'fragment' ) ) {\n\n\t\t\t// Don't auto-animate the opacity of fragments to avoid\n\t\t\t// conflicts with fragment animations\n\t\t\tdelete toProps.styles['opacity'];\n\n\t\t\tif( from.classList.contains( 'fragment' ) ) {\n\n\t\t\t\tlet fromFragmentStyle = ( from.className.match( FRAGMENT_STYLE_REGEX ) || [''] )[0];\n\t\t\t\tlet toFragmentStyle = ( to.className.match( FRAGMENT_STYLE_REGEX ) || [''] )[0];\n\n\t\t\t\t// Only skip the fragment if the fragment animation style\n\t\t\t\t// remains unchanged\n\t\t\t\tif( fromFragmentStyle === toFragmentStyle && animationOptions.slideDirection === 'forward' ) {\n\t\t\t\t\tto.classList.add( 'visible', 'disabled' );\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\t// If translation and/or scaling are enabled, css transform\n\t\t// the 'to' element so that it matches the position and size\n\t\t// of the 'from' element\n\t\tif( elementOptions.translate !== false || elementOptions.scale !== false ) {\n\n\t\t\tlet presentationScale = this.Reveal.getScale();\n\n\t\t\tlet delta = {\n\t\t\t\tx: ( fromProps.x - toProps.x ) / presentationScale,\n\t\t\t\ty: ( fromProps.y - toProps.y ) / presentationScale,\n\t\t\t\tscaleX: fromProps.width / toProps.width,\n\t\t\t\tscaleY: fromProps.height / toProps.height\n\t\t\t};\n\n\t\t\t// Limit decimal points to avoid 0.0001px blur and stutter\n\t\t\tdelta.x = Math.round( delta.x * 1000 ) / 1000;\n\t\t\tdelta.y = Math.round( delta.y * 1000 ) / 1000;\n\t\t\tdelta.scaleX = Math.round( delta.scaleX * 1000 ) / 1000;\n\t\t\tdelta.scaleX = Math.round( delta.scaleX * 1000 ) / 1000;\n\n\t\t\tlet translate = elementOptions.translate !== false && ( delta.x !== 0 || delta.y !== 0 ),\n\t\t\t\tscale = elementOptions.scale !== false && ( delta.scaleX !== 0 || delta.scaleY !== 0 );\n\n\t\t\t// No need to transform if nothing's changed\n\t\t\tif( translate || scale ) {\n\n\t\t\t\tlet transform = [];\n\n\t\t\t\tif( translate ) transform.push( `translate(${delta.x}px, ${delta.y}px)` );\n\t\t\t\tif( scale ) transform.push( `scale(${delta.scaleX}, ${delta.scaleY})` );\n\n\t\t\t\tfromProps.styles['transform'] = transform.join( ' ' );\n\t\t\t\tfromProps.styles['transform-origin'] = 'top left';\n\n\t\t\t\ttoProps.styles['transform'] = 'none';\n\n\t\t\t}\n\n\t\t}\n\n\t\t// Delete all unchanged 'to' styles\n\t\tfor( let propertyName in toProps.styles ) {\n\t\t\tconst toValue = toProps.styles[propertyName];\n\t\t\tconst fromValue = fromProps.styles[propertyName];\n\n\t\t\tif( toValue === fromValue ) {\n\t\t\t\tdelete toProps.styles[propertyName];\n\t\t\t}\n\t\t\telse {\n\t\t\t\t// If these property values were set via a custom matcher providing\n\t\t\t\t// an explicit 'from' and/or 'to' value, we always inject those values.\n\t\t\t\tif( toValue.explicitValue === true ) {\n\t\t\t\t\ttoProps.styles[propertyName] = toValue.value;\n\t\t\t\t}\n\n\t\t\t\tif( fromValue.explicitValue === true ) {\n\t\t\t\t\tfromProps.styles[propertyName] = fromValue.value;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tlet css = '';\n\n\t\tlet toStyleProperties = Object.keys( toProps.styles );\n\n\t\t// Only create animate this element IF at least one style\n\t\t// property has changed\n\t\tif( toStyleProperties.length > 0 ) {\n\n\t\t\t// Instantly move to the 'from' state\n\t\t\tfromProps.styles['transition'] = 'none';\n\n\t\t\t// Animate towards the 'to' state\n\t\t\ttoProps.styles['transition'] = `all ${options.duration}s ${options.easing} ${options.delay}s`;\n\t\t\ttoProps.styles['transition-property'] = toStyleProperties.join( ', ' );\n\t\t\ttoProps.styles['will-change'] = toStyleProperties.join( ', ' );\n\n\t\t\t// Build up our custom CSS. We need to override inline styles\n\t\t\t// so we need to make our styles vErY IMPORTANT!1!!\n\t\t\tlet fromCSS = Object.keys( fromProps.styles ).map( propertyName => {\n\t\t\t\treturn propertyName + ': ' + fromProps.styles[propertyName] + ' !important;';\n\t\t\t} ).join( '' );\n\n\t\t\tlet toCSS = Object.keys( toProps.styles ).map( propertyName => {\n\t\t\t\treturn propertyName + ': ' + toProps.styles[propertyName] + ' !important;';\n\t\t\t} ).join( '' );\n\n\t\t\tcss = \t'[data-auto-animate-target=\"'+ id +'\"] {'+ fromCSS +'}' +\n\t\t\t\t\t'[data-auto-animate=\"running\"] [data-auto-animate-target=\"'+ id +'\"] {'+ toCSS +'}';\n\n\t\t}\n\n\t\treturn css;\n\n\t}\n\n\t/**\n\t * Returns the auto-animate options for the given element.\n\t *\n\t * @param {HTMLElement} element Element to pick up options\n\t * from, either a slide or an animation target\n\t * @param {Object} [inheritedOptions] Optional set of existing\n\t * options\n\t */\n\tgetAutoAnimateOptions( element, inheritedOptions ) {\n\n\t\tlet options = {\n\t\t\teasing: this.Reveal.getConfig().autoAnimateEasing,\n\t\t\tduration: this.Reveal.getConfig().autoAnimateDuration,\n\t\t\tdelay: 0\n\t\t};\n\n\t\toptions = extend( options, inheritedOptions );\n\n\t\t// Inherit options from parent elements\n\t\tif( element.parentNode ) {\n\t\t\tlet autoAnimatedParent = closest( element.parentNode, '[data-auto-animate-target]' );\n\t\t\tif( autoAnimatedParent ) {\n\t\t\t\toptions = this.getAutoAnimateOptions( autoAnimatedParent, options );\n\t\t\t}\n\t\t}\n\n\t\tif( element.dataset.autoAnimateEasing ) {\n\t\t\toptions.easing = element.dataset.autoAnimateEasing;\n\t\t}\n\n\t\tif( element.dataset.autoAnimateDuration ) {\n\t\t\toptions.duration = parseFloat( element.dataset.autoAnimateDuration );\n\t\t}\n\n\t\tif( element.dataset.autoAnimateDelay ) {\n\t\t\toptions.delay = parseFloat( element.dataset.autoAnimateDelay );\n\t\t}\n\n\t\treturn options;\n\n\t}\n\n\t/**\n\t * Returns an object containing all of the properties\n\t * that can be auto-animated for the given element and\n\t * their current computed values.\n\t *\n\t * @param {String} direction 'from' or 'to'\n\t */\n\tgetAutoAnimatableProperties( direction, element, elementOptions ) {\n\n\t\tlet config = this.Reveal.getConfig();\n\n\t\tlet properties = { styles: [] };\n\n\t\t// Position and size\n\t\tif( elementOptions.translate !== false || elementOptions.scale !== false ) {\n\t\t\tlet bounds;\n\n\t\t\t// Custom auto-animate may optionally return a custom tailored\n\t\t\t// measurement function\n\t\t\tif( typeof elementOptions.measure === 'function' ) {\n\t\t\t\tbounds = elementOptions.measure( element );\n\t\t\t}\n\t\t\telse {\n\t\t\t\tif( config.center ) {\n\t\t\t\t\t// More precise, but breaks when used in combination\n\t\t\t\t\t// with zoom for scaling the deck ¯\\_(ツ)_/¯\n\t\t\t\t\tbounds = element.getBoundingClientRect();\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tlet scale = this.Reveal.getScale();\n\t\t\t\t\tbounds = {\n\t\t\t\t\t\tx: element.offsetLeft * scale,\n\t\t\t\t\t\ty: element.offsetTop * scale,\n\t\t\t\t\t\twidth: element.offsetWidth * scale,\n\t\t\t\t\t\theight: element.offsetHeight * scale\n\t\t\t\t\t};\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tproperties.x = bounds.x;\n\t\t\tproperties.y = bounds.y;\n\t\t\tproperties.width = bounds.width;\n\t\t\tproperties.height = bounds.height;\n\t\t}\n\n\t\tconst computedStyles = getComputedStyle( element );\n\n\t\t// CSS styles\n\t\t( elementOptions.styles || config.autoAnimateStyles ).forEach( style => {\n\t\t\tlet value;\n\n\t\t\t// `style` is either the property name directly, or an object\n\t\t\t// definition of a style property\n\t\t\tif( typeof style === 'string' ) style = { property: style };\n\n\t\t\tif( typeof style.from !== 'undefined' && direction === 'from' ) {\n\t\t\t\tvalue = { value: style.from, explicitValue: true };\n\t\t\t}\n\t\t\telse if( typeof style.to !== 'undefined' && direction === 'to' ) {\n\t\t\t\tvalue = { value: style.to, explicitValue: true };\n\t\t\t}\n\t\t\telse {\n\t\t\t\tvalue = computedStyles[style.property];\n\t\t\t}\n\n\t\t\tif( value !== '' ) {\n\t\t\t\tproperties.styles[style.property] = value;\n\t\t\t}\n\t\t} );\n\n\t\treturn properties;\n\n\t}\n\n\t/**\n\t * Get a list of all element pairs that we can animate\n\t * between the given slides.\n\t *\n\t * @param {HTMLElement} fromSlide\n\t * @param {HTMLElement} toSlide\n\t *\n\t * @return {Array} Each value is an array where [0] is\n\t * the element we're animating from and [1] is the\n\t * element we're animating to\n\t */\n\tgetAutoAnimatableElements( fromSlide, toSlide ) {\n\n\t\tlet matcher = typeof this.Reveal.getConfig().autoAnimateMatcher === 'function' ? this.Reveal.getConfig().autoAnimateMatcher : this.getAutoAnimatePairs;\n\n\t\tlet pairs = matcher.call( this, fromSlide, toSlide );\n\n\t\tlet reserved = [];\n\n\t\t// Remove duplicate pairs\n\t\treturn pairs.filter( ( pair, index ) => {\n\t\t\tif( reserved.indexOf( pair.to ) === -1 ) {\n\t\t\t\treserved.push( pair.to );\n\t\t\t\treturn true;\n\t\t\t}\n\t\t} );\n\n\t}\n\n\t/**\n\t * Identifies matching elements between slides.\n\t *\n\t * You can specify a custom matcher function by using\n\t * the `autoAnimateMatcher` config option.\n\t */\n\tgetAutoAnimatePairs( fromSlide, toSlide ) {\n\n\t\tlet pairs = [];\n\n\t\tconst codeNodes = 'pre';\n\t\tconst textNodes = 'h1, h2, h3, h4, h5, h6, p, li';\n\t\tconst mediaNodes = 'img, video, iframe';\n\n\t\t// Eplicit matches via data-id\n\t\tthis.findAutoAnimateMatches( pairs, fromSlide, toSlide, '[data-id]', node => {\n\t\t\treturn node.nodeName + ':::' + node.getAttribute( 'data-id' );\n\t\t} );\n\n\t\t// Text\n\t\tthis.findAutoAnimateMatches( pairs, fromSlide, toSlide, textNodes, node => {\n\t\t\treturn node.nodeName + ':::' + node.innerText;\n\t\t} );\n\n\t\t// Media\n\t\tthis.findAutoAnimateMatches( pairs, fromSlide, toSlide, mediaNodes, node => {\n\t\t\treturn node.nodeName + ':::' + ( node.getAttribute( 'src' ) || node.getAttribute( 'data-src' ) );\n\t\t} );\n\n\t\t// Code\n\t\tthis.findAutoAnimateMatches( pairs, fromSlide, toSlide, codeNodes, node => {\n\t\t\treturn node.nodeName + ':::' + node.innerText;\n\t\t} );\n\n\t\tpairs.forEach( pair => {\n\n\t\t\t// Disable scale transformations on text nodes, we transition\n\t\t\t// each individual text property instead\n\t\t\tif( matches( pair.from, textNodes ) ) {\n\t\t\t\tpair.options = { scale: false };\n\t\t\t}\n\t\t\t// Animate individual lines of code\n\t\t\telse if( matches( pair.from, codeNodes ) ) {\n\n\t\t\t\t// Transition the code block's width and height instead of scaling\n\t\t\t\t// to prevent its content from being squished\n\t\t\t\tpair.options = { scale: false, styles: [ 'width', 'height' ] };\n\n\t\t\t\t// Lines of code\n\t\t\t\tthis.findAutoAnimateMatches( pairs, pair.from, pair.to, '.hljs .hljs-ln-code', node => {\n\t\t\t\t\treturn node.textContent;\n\t\t\t\t}, {\n\t\t\t\t\tscale: false,\n\t\t\t\t\tstyles: [],\n\t\t\t\t\tmeasure: this.getLocalBoundingBox.bind( this )\n\t\t\t\t} );\n\n\t\t\t\t// Line numbers\n\t\t\t\tthis.findAutoAnimateMatches( pairs, pair.from, pair.to, '.hljs .hljs-ln-line[data-line-number]', node => {\n\t\t\t\t\treturn node.getAttribute( 'data-line-number' );\n\t\t\t\t}, {\n\t\t\t\t\tscale: false,\n\t\t\t\t\tstyles: [ 'width' ],\n\t\t\t\t\tmeasure: this.getLocalBoundingBox.bind( this )\n\t\t\t\t} );\n\n\t\t\t}\n\n\t\t}, this );\n\n\t\treturn pairs;\n\n\t}\n\n\t/**\n\t * Helper method which returns a bounding box based on\n\t * the given elements offset coordinates.\n\t *\n\t * @param {HTMLElement} element\n\t * @return {Object} x, y, width, height\n\t */\n\tgetLocalBoundingBox( element ) {\n\n\t\tconst presentationScale = this.Reveal.getScale();\n\n\t\treturn {\n\t\t\tx: Math.round( ( element.offsetLeft * presentationScale ) * 100 ) / 100,\n\t\t\ty: Math.round( ( element.offsetTop * presentationScale ) * 100 ) / 100,\n\t\t\twidth: Math.round( ( element.offsetWidth * presentationScale ) * 100 ) / 100,\n\t\t\theight: Math.round( ( element.offsetHeight * presentationScale ) * 100 ) / 100\n\t\t};\n\n\t}\n\n\t/**\n\t * Finds matching elements between two slides.\n\t *\n\t * @param {Array} pairs \tList of pairs to push matches to\n\t * @param {HTMLElement} fromScope Scope within the from element exists\n\t * @param {HTMLElement} toScope Scope within the to element exists\n\t * @param {String} selector CSS selector of the element to match\n\t * @param {Function} serializer A function that accepts an element and returns\n\t * a stringified ID based on its contents\n\t * @param {Object} animationOptions Optional config options for this pair\n\t */\n\tfindAutoAnimateMatches( pairs, fromScope, toScope, selector, serializer, animationOptions ) {\n\n\t\tlet fromMatches = {};\n\t\tlet toMatches = {};\n\n\t\t[].slice.call( fromScope.querySelectorAll( selector ) ).forEach( ( element, i ) => {\n\t\t\tconst key = serializer( element );\n\t\t\tif( typeof key === 'string' && key.length ) {\n\t\t\t\tfromMatches[key] = fromMatches[key] || [];\n\t\t\t\tfromMatches[key].push( element );\n\t\t\t}\n\t\t} );\n\n\t\t[].slice.call( toScope.querySelectorAll( selector ) ).forEach( ( element, i ) => {\n\t\t\tconst key = serializer( element );\n\t\t\ttoMatches[key] = toMatches[key] || [];\n\t\t\ttoMatches[key].push( element );\n\n\t\t\tlet fromElement;\n\n\t\t\t// Retrieve the 'from' element\n\t\t\tif( fromMatches[key] ) {\n\t\t\t\tconst pimaryIndex = toMatches[key].length - 1;\n\t\t\t\tconst secondaryIndex = fromMatches[key].length - 1;\n\n\t\t\t\t// If there are multiple identical from elements, retrieve\n\t\t\t\t// the one at the same index as our to-element.\n\t\t\t\tif( fromMatches[key][ pimaryIndex ] ) {\n\t\t\t\t\tfromElement = fromMatches[key][ pimaryIndex ];\n\t\t\t\t\tfromMatches[key][ pimaryIndex ] = null;\n\t\t\t\t}\n\t\t\t\t// If there are no matching from-elements at the same index,\n\t\t\t\t// use the last one.\n\t\t\t\telse if( fromMatches[key][ secondaryIndex ] ) {\n\t\t\t\t\tfromElement = fromMatches[key][ secondaryIndex ];\n\t\t\t\t\tfromMatches[key][ secondaryIndex ] = null;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// If we've got a matching pair, push it to the list of pairs\n\t\t\tif( fromElement ) {\n\t\t\t\tpairs.push({\n\t\t\t\t\tfrom: fromElement,\n\t\t\t\t\tto: element,\n\t\t\t\t\toptions: animationOptions\n\t\t\t\t});\n\t\t\t}\n\t\t} );\n\n\t}\n\n\t/**\n\t * Returns a all elements within the given scope that should\n\t * be considered unmatched in an auto-animate transition. If\n\t * fading of unmatched elements is turned on, these elements\n\t * will fade when going between auto-animate slides.\n\t *\n\t * Note that parents of auto-animate targets are NOT considerd\n\t * unmatched since fading them would break the auto-animation.\n\t *\n\t * @param {HTMLElement} rootElement\n\t * @return {Array}\n\t */\n\tgetUnmatchedAutoAnimateElements( rootElement ) {\n\n\t\treturn [].slice.call( rootElement.children ).reduce( ( result, element ) => {\n\n\t\t\tconst containsAnimatedElements = element.querySelector( '[data-auto-animate-target]' );\n\n\t\t\t// The element is unmatched if\n\t\t\t// - It is not an auto-animate target\n\t\t\t// - It does not contain any auto-animate targets\n\t\t\tif( !element.hasAttribute( 'data-auto-animate-target' ) && !containsAnimatedElements ) {\n\t\t\t\tresult.push( element );\n\t\t\t}\n\n\t\t\tif( element.querySelector( '[data-auto-animate-target]' ) ) {\n\t\t\t\tresult = result.concat( this.getUnmatchedAutoAnimateElements( element ) );\n\t\t\t}\n\n\t\t\treturn result;\n\n\t\t}, [] );\n\n\t}\n\n}\n","import { extend, queryAll } from '../utils/util.js'\n\n/**\n * Handles sorting and navigation of slide fragments.\n * Fragments are elements within a slide that are\n * revealed/animated incrementally.\n */\nexport default class Fragments {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t}\n\n\t/**\n\t * Called when the reveal.js config is updated.\n\t */\n\tconfigure( config, oldConfig ) {\n\n\t\tif( config.fragments === false ) {\n\t\t\tthis.disable();\n\t\t}\n\t\telse if( oldConfig.fragments === false ) {\n\t\t\tthis.enable();\n\t\t}\n\n\t}\n\n\t/**\n\t * If fragments are disabled in the deck, they should all be\n\t * visible rather than stepped through.\n\t */\n\tdisable() {\n\n\t\tqueryAll( this.Reveal.getSlidesElement(), '.fragment' ).forEach( element => {\n\t\t\telement.classList.add( 'visible' );\n\t\t\telement.classList.remove( 'current-fragment' );\n\t\t} );\n\n\t}\n\n\t/**\n\t * Reverse of #disable(). Only called if fragments have\n\t * previously been disabled.\n\t */\n\tenable() {\n\n\t\tqueryAll( this.Reveal.getSlidesElement(), '.fragment' ).forEach( element => {\n\t\t\telement.classList.remove( 'visible' );\n\t\t\telement.classList.remove( 'current-fragment' );\n\t\t} );\n\n\t}\n\n\t/**\n\t * Returns an object describing the available fragment\n\t * directions.\n\t *\n\t * @return {{prev: boolean, next: boolean}}\n\t */\n\tavailableRoutes() {\n\n\t\tlet currentSlide = this.Reveal.getCurrentSlide();\n\t\tif( currentSlide && this.Reveal.getConfig().fragments ) {\n\t\t\tlet fragments = currentSlide.querySelectorAll( '.fragment:not(.disabled)' );\n\t\t\tlet hiddenFragments = currentSlide.querySelectorAll( '.fragment:not(.disabled):not(.visible)' );\n\n\t\t\treturn {\n\t\t\t\tprev: fragments.length - hiddenFragments.length > 0,\n\t\t\t\tnext: !!hiddenFragments.length\n\t\t\t};\n\t\t}\n\t\telse {\n\t\t\treturn { prev: false, next: false };\n\t\t}\n\n\t}\n\n\t/**\n\t * Return a sorted fragments list, ordered by an increasing\n\t * \"data-fragment-index\" attribute.\n\t *\n\t * Fragments will be revealed in the order that they are returned by\n\t * this function, so you can use the index attributes to control the\n\t * order of fragment appearance.\n\t *\n\t * To maintain a sensible default fragment order, fragments are presumed\n\t * to be passed in document order. This function adds a \"fragment-index\"\n\t * attribute to each node if such an attribute is not already present,\n\t * and sets that attribute to an integer value which is the position of\n\t * the fragment within the fragments list.\n\t *\n\t * @param {object[]|*} fragments\n\t * @param {boolean} grouped If true the returned array will contain\n\t * nested arrays for all fragments with the same index\n\t * @return {object[]} sorted Sorted array of fragments\n\t */\n\tsort( fragments, grouped = false ) {\n\n\t\tfragments = Array.from( fragments );\n\n\t\tlet ordered = [],\n\t\t\tunordered = [],\n\t\t\tsorted = [];\n\n\t\t// Group ordered and unordered elements\n\t\tfragments.forEach( fragment => {\n\t\t\tif( fragment.hasAttribute( 'data-fragment-index' ) ) {\n\t\t\t\tlet index = parseInt( fragment.getAttribute( 'data-fragment-index' ), 10 );\n\n\t\t\t\tif( !ordered[index] ) {\n\t\t\t\t\tordered[index] = [];\n\t\t\t\t}\n\n\t\t\t\tordered[index].push( fragment );\n\t\t\t}\n\t\t\telse {\n\t\t\t\tunordered.push( [ fragment ] );\n\t\t\t}\n\t\t} );\n\n\t\t// Append fragments without explicit indices in their\n\t\t// DOM order\n\t\tordered = ordered.concat( unordered );\n\n\t\t// Manually count the index up per group to ensure there\n\t\t// are no gaps\n\t\tlet index = 0;\n\n\t\t// Push all fragments in their sorted order to an array,\n\t\t// this flattens the groups\n\t\tordered.forEach( group => {\n\t\t\tgroup.forEach( fragment => {\n\t\t\t\tsorted.push( fragment );\n\t\t\t\tfragment.setAttribute( 'data-fragment-index', index );\n\t\t\t} );\n\n\t\t\tindex ++;\n\t\t} );\n\n\t\treturn grouped === true ? ordered : sorted;\n\n\t}\n\n\t/**\n\t * Sorts and formats all of fragments in the\n\t * presentation.\n\t */\n\tsortAll() {\n\n\t\tthis.Reveal.getHorizontalSlides().forEach( horizontalSlide => {\n\n\t\t\tlet verticalSlides = queryAll( horizontalSlide, 'section' );\n\t\t\tverticalSlides.forEach( ( verticalSlide, y ) => {\n\n\t\t\t\tthis.sort( verticalSlide.querySelectorAll( '.fragment' ) );\n\n\t\t\t}, this );\n\n\t\t\tif( verticalSlides.length === 0 ) this.sort( horizontalSlide.querySelectorAll( '.fragment' ) );\n\n\t\t} );\n\n\t}\n\n\t/**\n\t * Refreshes the fragments on the current slide so that they\n\t * have the appropriate classes (.visible + .current-fragment).\n\t *\n\t * @param {number} [index] The index of the current fragment\n\t * @param {array} [fragments] Array containing all fragments\n\t * in the current slide\n\t *\n\t * @return {{shown: array, hidden: array}}\n\t */\n\tupdate( index, fragments ) {\n\n\t\tlet changedFragments = {\n\t\t\tshown: [],\n\t\t\thidden: []\n\t\t};\n\n\t\tlet currentSlide = this.Reveal.getCurrentSlide();\n\t\tif( currentSlide && this.Reveal.getConfig().fragments ) {\n\n\t\t\tfragments = fragments || this.sort( currentSlide.querySelectorAll( '.fragment' ) );\n\n\t\t\tif( fragments.length ) {\n\n\t\t\t\tlet maxIndex = 0;\n\n\t\t\t\tif( typeof index !== 'number' ) {\n\t\t\t\t\tlet currentFragment = this.sort( currentSlide.querySelectorAll( '.fragment.visible' ) ).pop();\n\t\t\t\t\tif( currentFragment ) {\n\t\t\t\t\t\tindex = parseInt( currentFragment.getAttribute( 'data-fragment-index' ) || 0, 10 );\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\tArray.from( fragments ).forEach( ( el, i ) => {\n\n\t\t\t\t\tif( el.hasAttribute( 'data-fragment-index' ) ) {\n\t\t\t\t\t\ti = parseInt( el.getAttribute( 'data-fragment-index' ), 10 );\n\t\t\t\t\t}\n\n\t\t\t\t\tmaxIndex = Math.max( maxIndex, i );\n\n\t\t\t\t\t// Visible fragments\n\t\t\t\t\tif( i <= index ) {\n\t\t\t\t\t\tlet wasVisible = el.classList.contains( 'visible' )\n\t\t\t\t\t\tel.classList.add( 'visible' );\n\t\t\t\t\t\tel.classList.remove( 'current-fragment' );\n\n\t\t\t\t\t\tif( i === index ) {\n\t\t\t\t\t\t\t// Announce the fragments one by one to the Screen Reader\n\t\t\t\t\t\t\tthis.Reveal.announceStatus( this.Reveal.getStatusText( el ) );\n\n\t\t\t\t\t\t\tel.classList.add( 'current-fragment' );\n\t\t\t\t\t\t\tthis.Reveal.slideContent.startEmbeddedContent( el );\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tif( !wasVisible ) {\n\t\t\t\t\t\t\tchangedFragments.shown.push( el )\n\t\t\t\t\t\t\tthis.Reveal.dispatchEvent({\n\t\t\t\t\t\t\t\ttarget: el,\n\t\t\t\t\t\t\t\ttype: 'visible',\n\t\t\t\t\t\t\t\tbubbles: false\n\t\t\t\t\t\t\t});\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t\t// Hidden fragments\n\t\t\t\t\telse {\n\t\t\t\t\t\tlet wasVisible = el.classList.contains( 'visible' )\n\t\t\t\t\t\tel.classList.remove( 'visible' );\n\t\t\t\t\t\tel.classList.remove( 'current-fragment' );\n\n\t\t\t\t\t\tif( wasVisible ) {\n\t\t\t\t\t\t\tthis.Reveal.slideContent.stopEmbeddedContent( el );\n\t\t\t\t\t\t\tchangedFragments.hidden.push( el );\n\t\t\t\t\t\t\tthis.Reveal.dispatchEvent({\n\t\t\t\t\t\t\t\ttarget: el,\n\t\t\t\t\t\t\t\ttype: 'hidden',\n\t\t\t\t\t\t\t\tbubbles: false\n\t\t\t\t\t\t\t});\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\n\t\t\t\t} );\n\n\t\t\t\t// Write the current fragment index to the slide
.\n\t\t\t\t// This can be used by end users to apply styles based on\n\t\t\t\t// the current fragment index.\n\t\t\t\tindex = typeof index === 'number' ? index : -1;\n\t\t\t\tindex = Math.max( Math.min( index, maxIndex ), -1 );\n\t\t\t\tcurrentSlide.setAttribute( 'data-fragment', index );\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn changedFragments;\n\n\t}\n\n\t/**\n\t * Formats the fragments on the given slide so that they have\n\t * valid indices. Call this if fragments are changed in the DOM\n\t * after reveal.js has already initialized.\n\t *\n\t * @param {HTMLElement} slide\n\t * @return {Array} a list of the HTML fragments that were synced\n\t */\n\tsync( slide = this.Reveal.getCurrentSlide() ) {\n\n\t\treturn this.sort( slide.querySelectorAll( '.fragment' ) );\n\n\t}\n\n\t/**\n\t * Navigate to the specified slide fragment.\n\t *\n\t * @param {?number} index The index of the fragment that\n\t * should be shown, -1 means all are invisible\n\t * @param {number} offset Integer offset to apply to the\n\t * fragment index\n\t *\n\t * @return {boolean} true if a change was made in any\n\t * fragments visibility as part of this call\n\t */\n\tgoto( index, offset = 0 ) {\n\n\t\tlet currentSlide = this.Reveal.getCurrentSlide();\n\t\tif( currentSlide && this.Reveal.getConfig().fragments ) {\n\n\t\t\tlet fragments = this.sort( currentSlide.querySelectorAll( '.fragment:not(.disabled)' ) );\n\t\t\tif( fragments.length ) {\n\n\t\t\t\t// If no index is specified, find the current\n\t\t\t\tif( typeof index !== 'number' ) {\n\t\t\t\t\tlet lastVisibleFragment = this.sort( currentSlide.querySelectorAll( '.fragment:not(.disabled).visible' ) ).pop();\n\n\t\t\t\t\tif( lastVisibleFragment ) {\n\t\t\t\t\t\tindex = parseInt( lastVisibleFragment.getAttribute( 'data-fragment-index' ) || 0, 10 );\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tindex = -1;\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\t// Apply the offset if there is one\n\t\t\t\tindex += offset;\n\n\t\t\t\tlet changedFragments = this.update( index, fragments );\n\n\t\t\t\tif( changedFragments.hidden.length ) {\n\t\t\t\t\tthis.Reveal.dispatchEvent({\n\t\t\t\t\t\ttype: 'fragmenthidden',\n\t\t\t\t\t\tdata: {\n\t\t\t\t\t\t\tfragment: changedFragments.hidden[0],\n\t\t\t\t\t\t\tfragments: changedFragments.hidden\n\t\t\t\t\t\t}\n\t\t\t\t\t});\n\t\t\t\t}\n\n\t\t\t\tif( changedFragments.shown.length ) {\n\t\t\t\t\tthis.Reveal.dispatchEvent({\n\t\t\t\t\t\ttype: 'fragmentshown',\n\t\t\t\t\t\tdata: {\n\t\t\t\t\t\t\tfragment: changedFragments.shown[0],\n\t\t\t\t\t\t\tfragments: changedFragments.shown\n\t\t\t\t\t\t}\n\t\t\t\t\t});\n\t\t\t\t}\n\n\t\t\t\tthis.Reveal.controls.update();\n\t\t\t\tthis.Reveal.progress.update();\n\n\t\t\t\tif( this.Reveal.getConfig().fragmentInURL ) {\n\t\t\t\t\tthis.Reveal.location.writeURL();\n\t\t\t\t}\n\n\t\t\t\treturn !!( changedFragments.shown.length || changedFragments.hidden.length );\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn false;\n\n\t}\n\n\t/**\n\t * Navigate to the next slide fragment.\n\t *\n\t * @return {boolean} true if there was a next fragment,\n\t * false otherwise\n\t */\n\tnext() {\n\n\t\treturn this.goto( null, 1 );\n\n\t}\n\n\t/**\n\t * Navigate to the previous slide fragment.\n\t *\n\t * @return {boolean} true if there was a previous fragment,\n\t * false otherwise\n\t */\n\tprev() {\n\n\t\treturn this.goto( null, -1 );\n\n\t}\n\n}","import { SLIDES_SELECTOR } from '../utils/constants.js'\nimport { extend, queryAll, transformElement } from '../utils/util.js'\n\n/**\n * Handles all logic related to the overview mode\n * (birds-eye view of all slides).\n */\nexport default class Overview {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t\tthis.active = false;\n\n\t\tthis.onSlideClicked = this.onSlideClicked.bind( this );\n\n\t}\n\n\t/**\n\t * Displays the overview of slides (quick nav) by scaling\n\t * down and arranging all slide elements.\n\t */\n\tactivate() {\n\n\t\t// Only proceed if enabled in config\n\t\tif( this.Reveal.getConfig().overview && !this.isActive() ) {\n\n\t\t\tthis.active = true;\n\n\t\t\tthis.Reveal.getRevealElement().classList.add( 'overview' );\n\n\t\t\t// Don't auto-slide while in overview mode\n\t\t\tthis.Reveal.cancelAutoSlide();\n\n\t\t\t// Move the backgrounds element into the slide container to\n\t\t\t// that the same scaling is applied\n\t\t\tthis.Reveal.getSlidesElement().appendChild( this.Reveal.getBackgroundsElement() );\n\n\t\t\t// Clicking on an overview slide navigates to it\n\t\t\tqueryAll( this.Reveal.getRevealElement(), SLIDES_SELECTOR ).forEach( slide => {\n\t\t\t\tif( !slide.classList.contains( 'stack' ) ) {\n\t\t\t\t\tslide.addEventListener( 'click', this.onSlideClicked, true );\n\t\t\t\t}\n\t\t\t} );\n\n\t\t\t// Calculate slide sizes\n\t\t\tconst margin = 70;\n\t\t\tconst slideSize = this.Reveal.getComputedSlideSize();\n\t\t\tthis.overviewSlideWidth = slideSize.width + margin;\n\t\t\tthis.overviewSlideHeight = slideSize.height + margin;\n\n\t\t\t// Reverse in RTL mode\n\t\t\tif( this.Reveal.getConfig().rtl ) {\n\t\t\t\tthis.overviewSlideWidth = -this.overviewSlideWidth;\n\t\t\t}\n\n\t\t\tthis.Reveal.updateSlidesVisibility();\n\n\t\t\tthis.layout();\n\t\t\tthis.update();\n\n\t\t\tthis.Reveal.layout();\n\n\t\t\tconst indices = this.Reveal.getIndices();\n\n\t\t\t// Notify observers of the overview showing\n\t\t\tthis.Reveal.dispatchEvent({\n\t\t\t\ttype: 'overviewshown',\n\t\t\t\tdata: {\n\t\t\t\t\t'indexh': indices.h,\n\t\t\t\t\t'indexv': indices.v,\n\t\t\t\t\t'currentSlide': this.Reveal.getCurrentSlide()\n\t\t\t\t}\n\t\t\t});\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Uses CSS transforms to position all slides in a grid for\n\t * display inside of the overview mode.\n\t */\n\tlayout() {\n\n\t\t// Layout slides\n\t\tthis.Reveal.getHorizontalSlides().forEach( ( hslide, h ) => {\n\t\t\thslide.setAttribute( 'data-index-h', h );\n\t\t\ttransformElement( hslide, 'translate3d(' + ( h * this.overviewSlideWidth ) + 'px, 0, 0)' );\n\n\t\t\tif( hslide.classList.contains( 'stack' ) ) {\n\n\t\t\t\tqueryAll( hslide, 'section' ).forEach( ( vslide, v ) => {\n\t\t\t\t\tvslide.setAttribute( 'data-index-h', h );\n\t\t\t\t\tvslide.setAttribute( 'data-index-v', v );\n\n\t\t\t\t\ttransformElement( vslide, 'translate3d(0, ' + ( v * this.overviewSlideHeight ) + 'px, 0)' );\n\t\t\t\t} );\n\n\t\t\t}\n\t\t} );\n\n\t\t// Layout slide backgrounds\n\t\tArray.from( this.Reveal.getBackgroundsElement().childNodes ).forEach( ( hbackground, h ) => {\n\t\t\ttransformElement( hbackground, 'translate3d(' + ( h * this.overviewSlideWidth ) + 'px, 0, 0)' );\n\n\t\t\tqueryAll( hbackground, '.slide-background' ).forEach( ( vbackground, v ) => {\n\t\t\t\ttransformElement( vbackground, 'translate3d(0, ' + ( v * this.overviewSlideHeight ) + 'px, 0)' );\n\t\t\t} );\n\t\t} );\n\n\t}\n\n\t/**\n\t * Moves the overview viewport to the current slides.\n\t * Called each time the current slide changes.\n\t */\n\tupdate() {\n\n\t\tconst vmin = Math.min( window.innerWidth, window.innerHeight );\n\t\tconst scale = Math.max( vmin / 5, 150 ) / vmin;\n\t\tconst indices = this.Reveal.getIndices();\n\n\t\tthis.Reveal.transformSlides( {\n\t\t\toverview: [\n\t\t\t\t'scale('+ scale +')',\n\t\t\t\t'translateX('+ ( -indices.h * this.overviewSlideWidth ) +'px)',\n\t\t\t\t'translateY('+ ( -indices.v * this.overviewSlideHeight ) +'px)'\n\t\t\t].join( ' ' )\n\t\t} );\n\n\t}\n\n\t/**\n\t * Exits the slide overview and enters the currently\n\t * active slide.\n\t */\n\tdeactivate() {\n\n\t\t// Only proceed if enabled in config\n\t\tif( this.Reveal.getConfig().overview ) {\n\n\t\t\tthis.active = false;\n\n\t\t\tthis.Reveal.getRevealElement().classList.remove( 'overview' );\n\n\t\t\t// Temporarily add a class so that transitions can do different things\n\t\t\t// depending on whether they are exiting/entering overview, or just\n\t\t\t// moving from slide to slide\n\t\t\tthis.Reveal.getRevealElement().classList.add( 'overview-deactivating' );\n\n\t\t\tsetTimeout( () => {\n\t\t\t\tthis.Reveal.getRevealElement().classList.remove( 'overview-deactivating' );\n\t\t\t}, 1 );\n\n\t\t\t// Move the background element back out\n\t\t\tthis.Reveal.getRevealElement().appendChild( this.Reveal.getBackgroundsElement() );\n\n\t\t\t// Clean up changes made to slides\n\t\t\tqueryAll( this.Reveal.getRevealElement(), SLIDES_SELECTOR ).forEach( slide => {\n\t\t\t\ttransformElement( slide, '' );\n\n\t\t\t\tslide.removeEventListener( 'click', this.onSlideClicked, true );\n\t\t\t} );\n\n\t\t\t// Clean up changes made to backgrounds\n\t\t\tqueryAll( this.Reveal.getBackgroundsElement(), '.slide-background' ).forEach( background => {\n\t\t\t\ttransformElement( background, '' );\n\t\t\t} );\n\n\t\t\tthis.Reveal.transformSlides( { overview: '' } );\n\n\t\t\tconst indices = this.Reveal.getIndices();\n\n\t\t\tthis.Reveal.slide( indices.h, indices.v );\n\t\t\tthis.Reveal.layout();\n\t\t\tthis.Reveal.cueAutoSlide();\n\n\t\t\t// Notify observers of the overview hiding\n\t\t\tthis.Reveal.dispatchEvent({\n\t\t\t\ttype: 'overviewhidden',\n\t\t\t\tdata: {\n\t\t\t\t\t'indexh': indices.h,\n\t\t\t\t\t'indexv': indices.v,\n\t\t\t\t\t'currentSlide': this.Reveal.getCurrentSlide()\n\t\t\t\t}\n\t\t\t});\n\n\t\t}\n\t}\n\n\t/**\n\t * Toggles the slide overview mode on and off.\n\t *\n\t * @param {Boolean} [override] Flag which overrides the\n\t * toggle logic and forcibly sets the desired state. True means\n\t * overview is open, false means it's closed.\n\t */\n\ttoggle( override ) {\n\n\t\tif( typeof override === 'boolean' ) {\n\t\t\toverride ? this.activate() : this.deactivate();\n\t\t}\n\t\telse {\n\t\t\tthis.isActive() ? this.deactivate() : this.activate();\n\t\t}\n\n\t}\n\n\t/**\n\t * Checks if the overview is currently active.\n\t *\n\t * @return {Boolean} true if the overview is active,\n\t * false otherwise\n\t */\n\tisActive() {\n\n\t\treturn this.active;\n\n\t}\n\n\t/**\n\t * Invoked when a slide is and we're in the overview.\n\t *\n\t * @param {object} event\n\t */\n\tonSlideClicked( event ) {\n\n\t\tif( this.isActive() ) {\n\t\t\tevent.preventDefault();\n\n\t\t\tlet element = event.target;\n\n\t\t\twhile( element && !element.nodeName.match( /section/gi ) ) {\n\t\t\t\telement = element.parentNode;\n\t\t\t}\n\n\t\t\tif( element && !element.classList.contains( 'disabled' ) ) {\n\n\t\t\t\tthis.deactivate();\n\n\t\t\t\tif( element.nodeName.match( /section/gi ) ) {\n\t\t\t\t\tlet h = parseInt( element.getAttribute( 'data-index-h' ), 10 ),\n\t\t\t\t\t\tv = parseInt( element.getAttribute( 'data-index-v' ), 10 );\n\n\t\t\t\t\tthis.Reveal.slide( h, v );\n\t\t\t\t}\n\n\t\t\t}\n\t\t}\n\n\t}\n\n}","import { enterFullscreen } from '../utils/util.js'\n\n/**\n * Handles all reveal.js keyboard interactions.\n */\nexport default class Keyboard {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t\t// A key:value map of keyboard keys and descriptions of\n\t\t// the actions they trigger\n\t\tthis.shortcuts = {};\n\n\t\t// Holds custom key code mappings\n\t\tthis.bindings = {};\n\n\t\tthis.onDocumentKeyDown = this.onDocumentKeyDown.bind( this );\n\t\tthis.onDocumentKeyPress = this.onDocumentKeyPress.bind( this );\n\n\t}\n\n\t/**\n\t * Called when the reveal.js config is updated.\n\t */\n\tconfigure( config, oldConfig ) {\n\n\t\tif( config.navigationMode === 'linear' ) {\n\t\t\tthis.shortcuts['→ , ↓ , SPACE , N , L , J'] = 'Next slide';\n\t\t\tthis.shortcuts['← , ↑ , P , H , K'] = 'Previous slide';\n\t\t}\n\t\telse {\n\t\t\tthis.shortcuts['N , SPACE'] = 'Next slide';\n\t\t\tthis.shortcuts['P , Shift SPACE'] = 'Previous slide';\n\t\t\tthis.shortcuts['← , H'] = 'Navigate left';\n\t\t\tthis.shortcuts['→ , L'] = 'Navigate right';\n\t\t\tthis.shortcuts['↑ , K'] = 'Navigate up';\n\t\t\tthis.shortcuts['↓ , J'] = 'Navigate down';\n\t\t}\n\n\t\tthis.shortcuts['Alt + ←/↑/→/↓'] = 'Navigate without fragments';\n\t\tthis.shortcuts['Shift + ←/↑/→/↓'] = 'Jump to first/last slide';\n\t\tthis.shortcuts['B , .'] = 'Pause';\n\t\tthis.shortcuts['F'] = 'Fullscreen';\n\t\tthis.shortcuts['ESC, O'] = 'Slide overview';\n\n\t}\n\n\t/**\n\t * Starts listening for keyboard events.\n\t */\n\tbind() {\n\n\t\tdocument.addEventListener( 'keydown', this.onDocumentKeyDown, false );\n\t\tdocument.addEventListener( 'keypress', this.onDocumentKeyPress, false );\n\n\t}\n\n\t/**\n\t * Stops listening for keyboard events.\n\t */\n\tunbind() {\n\n\t\tdocument.removeEventListener( 'keydown', this.onDocumentKeyDown, false );\n\t\tdocument.removeEventListener( 'keypress', this.onDocumentKeyPress, false );\n\n\t}\n\n\t/**\n\t * Add a custom key binding with optional description to\n\t * be added to the help screen.\n\t */\n\taddKeyBinding( binding, callback ) {\n\n\t\tif( typeof binding === 'object' && binding.keyCode ) {\n\t\t\tthis.bindings[binding.keyCode] = {\n\t\t\t\tcallback: callback,\n\t\t\t\tkey: binding.key,\n\t\t\t\tdescription: binding.description\n\t\t\t};\n\t\t}\n\t\telse {\n\t\t\tthis.bindings[binding] = {\n\t\t\t\tcallback: callback,\n\t\t\t\tkey: null,\n\t\t\t\tdescription: null\n\t\t\t};\n\t\t}\n\n\t}\n\n\t/**\n\t * Removes the specified custom key binding.\n\t */\n\tremoveKeyBinding( keyCode ) {\n\n\t\tdelete this.bindings[keyCode];\n\n\t}\n\n\t/**\n\t * Programmatically triggers a keyboard event\n\t *\n\t * @param {int} keyCode\n\t */\n\ttriggerKey( keyCode ) {\n\n\t\tthis.onDocumentKeyDown( { keyCode } );\n\n\t}\n\n\t/**\n\t * Registers a new shortcut to include in the help overlay\n\t *\n\t * @param {String} key\n\t * @param {String} value\n\t */\n\tregisterKeyboardShortcut( key, value ) {\n\n\t\tthis.shortcuts[key] = value;\n\n\t}\n\n\tgetShortcuts() {\n\n\t\treturn this.shortcuts;\n\n\t}\n\n\tgetBindings() {\n\n\t\treturn this.bindings;\n\n\t}\n\n\t/**\n\t * Handler for the document level 'keypress' event.\n\t *\n\t * @param {object} event\n\t */\n\tonDocumentKeyPress( event ) {\n\n\t\t// Check if the pressed key is question mark\n\t\tif( event.shiftKey && event.charCode === 63 ) {\n\t\t\tthis.Reveal.toggleHelp();\n\t\t}\n\n\t}\n\n\t/**\n\t * Handler for the document level 'keydown' event.\n\t *\n\t * @param {object} event\n\t */\n\tonDocumentKeyDown( event ) {\n\n\t\tlet config = this.Reveal.getConfig();\n\n\t\t// If there's a condition specified and it returns false,\n\t\t// ignore this event\n\t\tif( typeof config.keyboardCondition === 'function' && config.keyboardCondition(event) === false ) {\n\t\t\treturn true;\n\t\t}\n\n\t\t// If keyboardCondition is set, only capture keyboard events\n\t\t// for embedded decks when they are focused\n\t\tif( config.keyboardCondition === 'focused' && !this.Reveal.isFocused() ) {\n\t\t\treturn true;\n\t\t}\n\n\t\t// Shorthand\n\t\tlet keyCode = event.keyCode;\n\n\t\t// Remember if auto-sliding was paused so we can toggle it\n\t\tlet autoSlideWasPaused = !this.Reveal.isAutoSliding();\n\n\t\tthis.Reveal.onUserInput( event );\n\n\t\t// Is there a focused element that could be using the keyboard?\n\t\tlet activeElementIsCE = document.activeElement && document.activeElement.isContentEditable === true;\n\t\tlet activeElementIsInput = document.activeElement && document.activeElement.tagName && /input|textarea/i.test( document.activeElement.tagName );\n\t\tlet activeElementIsNotes = document.activeElement && document.activeElement.className && /speaker-notes/i.test( document.activeElement.className);\n\n\t\t// Whitelist certain modifiers for slide navigation shortcuts\n\t\tlet isNavigationKey = [32, 37, 38, 39, 40, 78, 80].indexOf( event.keyCode ) !== -1;\n\n\t\t// Prevent all other events when a modifier is pressed\n\t\tlet unusedModifier = \t!( isNavigationKey && event.shiftKey || event.altKey ) &&\n\t\t\t\t\t\t\t\t( event.shiftKey || event.altKey || event.ctrlKey || event.metaKey );\n\n\t\t// Disregard the event if there's a focused element or a\n\t\t// keyboard modifier key is present\n\t\tif( activeElementIsCE || activeElementIsInput || activeElementIsNotes || unusedModifier ) return;\n\n\t\t// While paused only allow resume keyboard events; 'b', 'v', '.'\n\t\tlet resumeKeyCodes = [66,86,190,191];\n\t\tlet key;\n\n\t\t// Custom key bindings for togglePause should be able to resume\n\t\tif( typeof config.keyboard === 'object' ) {\n\t\t\tfor( key in config.keyboard ) {\n\t\t\t\tif( config.keyboard[key] === 'togglePause' ) {\n\t\t\t\t\tresumeKeyCodes.push( parseInt( key, 10 ) );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tif( this.Reveal.isPaused() && resumeKeyCodes.indexOf( keyCode ) === -1 ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Use linear navigation if we're configured to OR if\n\t\t// the presentation is one-dimensional\n\t\tlet useLinearMode = config.navigationMode === 'linear' || !this.Reveal.hasHorizontalSlides() || !this.Reveal.hasVerticalSlides();\n\n\t\tlet triggered = false;\n\n\t\t// 1. User defined key bindings\n\t\tif( typeof config.keyboard === 'object' ) {\n\n\t\t\tfor( key in config.keyboard ) {\n\n\t\t\t\t// Check if this binding matches the pressed key\n\t\t\t\tif( parseInt( key, 10 ) === keyCode ) {\n\n\t\t\t\t\tlet value = config.keyboard[ key ];\n\n\t\t\t\t\t// Callback function\n\t\t\t\t\tif( typeof value === 'function' ) {\n\t\t\t\t\t\tvalue.apply( null, [ event ] );\n\t\t\t\t\t}\n\t\t\t\t\t// String shortcuts to reveal.js API\n\t\t\t\t\telse if( typeof value === 'string' && typeof this.Reveal[ value ] === 'function' ) {\n\t\t\t\t\t\tthis.Reveal[ value ].call();\n\t\t\t\t\t}\n\n\t\t\t\t\ttriggered = true;\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\t// 2. Registered custom key bindings\n\t\tif( triggered === false ) {\n\n\t\t\tfor( key in this.bindings ) {\n\n\t\t\t\t// Check if this binding matches the pressed key\n\t\t\t\tif( parseInt( key, 10 ) === keyCode ) {\n\n\t\t\t\t\tlet action = this.bindings[ key ].callback;\n\n\t\t\t\t\t// Callback function\n\t\t\t\t\tif( typeof action === 'function' ) {\n\t\t\t\t\t\taction.apply( null, [ event ] );\n\t\t\t\t\t}\n\t\t\t\t\t// String shortcuts to reveal.js API\n\t\t\t\t\telse if( typeof action === 'string' && typeof this.Reveal[ action ] === 'function' ) {\n\t\t\t\t\t\tthis.Reveal[ action ].call();\n\t\t\t\t\t}\n\n\t\t\t\t\ttriggered = true;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\t// 3. System defined key bindings\n\t\tif( triggered === false ) {\n\n\t\t\t// Assume true and try to prove false\n\t\t\ttriggered = true;\n\n\t\t\t// P, PAGE UP\n\t\t\tif( keyCode === 80 || keyCode === 33 ) {\n\t\t\t\tthis.Reveal.prev({skipFragments: event.altKey});\n\t\t\t}\n\t\t\t// N, PAGE DOWN\n\t\t\telse if( keyCode === 78 || keyCode === 34 ) {\n\t\t\t\tthis.Reveal.next({skipFragments: event.altKey});\n\t\t\t}\n\t\t\t// H, LEFT\n\t\t\telse if( keyCode === 72 || keyCode === 37 ) {\n\t\t\t\tif( event.shiftKey ) {\n\t\t\t\t\tthis.Reveal.slide( 0 );\n\t\t\t\t}\n\t\t\t\telse if( !this.Reveal.overview.isActive() && useLinearMode ) {\n\t\t\t\t\tthis.Reveal.prev({skipFragments: event.altKey});\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tthis.Reveal.left({skipFragments: event.altKey});\n\t\t\t\t}\n\t\t\t}\n\t\t\t// L, RIGHT\n\t\t\telse if( keyCode === 76 || keyCode === 39 ) {\n\t\t\t\tif( event.shiftKey ) {\n\t\t\t\t\tthis.Reveal.slide( this.Reveal.getHorizontalSlides().length - 1 );\n\t\t\t\t}\n\t\t\t\telse if( !this.Reveal.overview.isActive() && useLinearMode ) {\n\t\t\t\t\tthis.Reveal.next({skipFragments: event.altKey});\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tthis.Reveal.right({skipFragments: event.altKey});\n\t\t\t\t}\n\t\t\t}\n\t\t\t// K, UP\n\t\t\telse if( keyCode === 75 || keyCode === 38 ) {\n\t\t\t\tif( event.shiftKey ) {\n\t\t\t\t\tthis.Reveal.slide( undefined, 0 );\n\t\t\t\t}\n\t\t\t\telse if( !this.Reveal.overview.isActive() && useLinearMode ) {\n\t\t\t\t\tthis.Reveal.prev({skipFragments: event.altKey});\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tthis.Reveal.up({skipFragments: event.altKey});\n\t\t\t\t}\n\t\t\t}\n\t\t\t// J, DOWN\n\t\t\telse if( keyCode === 74 || keyCode === 40 ) {\n\t\t\t\tif( event.shiftKey ) {\n\t\t\t\t\tthis.Reveal.slide( undefined, Number.MAX_VALUE );\n\t\t\t\t}\n\t\t\t\telse if( !this.Reveal.overview.isActive() && useLinearMode ) {\n\t\t\t\t\tthis.Reveal.next({skipFragments: event.altKey});\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tthis.Reveal.down({skipFragments: event.altKey});\n\t\t\t\t}\n\t\t\t}\n\t\t\t// HOME\n\t\t\telse if( keyCode === 36 ) {\n\t\t\t\tthis.Reveal.slide( 0 );\n\t\t\t}\n\t\t\t// END\n\t\t\telse if( keyCode === 35 ) {\n\t\t\t\tthis.Reveal.slide( this.Reveal.getHorizontalSlides().length - 1 );\n\t\t\t}\n\t\t\t// SPACE\n\t\t\telse if( keyCode === 32 ) {\n\t\t\t\tif( this.Reveal.overview.isActive() ) {\n\t\t\t\t\tthis.Reveal.overview.deactivate();\n\t\t\t\t}\n\t\t\t\tif( event.shiftKey ) {\n\t\t\t\t\tthis.Reveal.prev({skipFragments: event.altKey});\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tthis.Reveal.next({skipFragments: event.altKey});\n\t\t\t\t}\n\t\t\t}\n\t\t\t// TWO-SPOT, SEMICOLON, B, V, PERIOD, LOGITECH PRESENTER TOOLS \"BLACK SCREEN\" BUTTON\n\t\t\telse if( keyCode === 58 || keyCode === 59 || keyCode === 66 || keyCode === 86 || keyCode === 190 || keyCode === 191 ) {\n\t\t\t\tthis.Reveal.togglePause();\n\t\t\t}\n\t\t\t// F\n\t\t\telse if( keyCode === 70 ) {\n\t\t\t\tenterFullscreen( config.embedded ? this.Reveal.getViewportElement() : document.documentElement );\n\t\t\t}\n\t\t\t// A\n\t\t\telse if( keyCode === 65 ) {\n\t\t\t\tif ( config.autoSlideStoppable ) {\n\t\t\t\t\tthis.Reveal.toggleAutoSlide( autoSlideWasPaused );\n\t\t\t\t}\n\t\t\t}\n\t\t\telse {\n\t\t\t\ttriggered = false;\n\t\t\t}\n\n\t\t}\n\n\t\t// If the input resulted in a triggered action we should prevent\n\t\t// the browsers default behavior\n\t\tif( triggered ) {\n\t\t\tevent.preventDefault && event.preventDefault();\n\t\t}\n\t\t// ESC or O key\n\t\telse if( keyCode === 27 || keyCode === 79 ) {\n\t\t\tif( this.Reveal.closeOverlay() === false ) {\n\t\t\t\tthis.Reveal.overview.toggle();\n\t\t\t}\n\n\t\t\tevent.preventDefault && event.preventDefault();\n\t\t}\n\n\t\t// If auto-sliding is enabled we need to cue up\n\t\t// another timeout\n\t\tthis.Reveal.cueAutoSlide();\n\n\t}\n\n}","/**\n * Reads and writes the URL based on reveal.js' current state.\n */\nexport default class Location {\n\n\t// The minimum number of milliseconds that must pass between\n\t// calls to history.replaceState\n\tMAX_REPLACE_STATE_FREQUENCY = 1000\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t\t// Delays updates to the URL due to a Chrome thumbnailer bug\n\t\tthis.writeURLTimeout = 0;\n\n\t\tthis.replaceStateTimestamp = 0;\n\n\t\tthis.onWindowHashChange = this.onWindowHashChange.bind( this );\n\n\t}\n\n\tbind() {\n\n\t\twindow.addEventListener( 'hashchange', this.onWindowHashChange, false );\n\n\t}\n\n\tunbind() {\n\n\t\twindow.removeEventListener( 'hashchange', this.onWindowHashChange, false );\n\n\t}\n\n\t/**\n\t * Returns the slide indices for the given hash link.\n\t *\n\t * @param {string} [hash] the hash string that we want to\n\t * find the indices for\n\t *\n\t * @returns slide indices or null\n\t */\n\tgetIndicesFromHash( hash=window.location.hash ) {\n\n\t\t// Attempt to parse the hash as either an index or name\n\t\tlet name = hash.replace( /^#\\/?/, '' );\n\t\tlet bits = name.split( '/' );\n\n\t\t// If the first bit is not fully numeric and there is a name we\n\t\t// can assume that this is a named link\n\t\tif( !/^[0-9]*$/.test( bits[0] ) && name.length ) {\n\t\t\tlet element;\n\n\t\t\tlet f;\n\n\t\t\t// Parse named links with fragments (#/named-link/2)\n\t\t\tif( /\\/[-\\d]+$/g.test( name ) ) {\n\t\t\t\tf = parseInt( name.split( '/' ).pop(), 10 );\n\t\t\t\tf = isNaN(f) ? undefined : f;\n\t\t\t\tname = name.split( '/' ).shift();\n\t\t\t}\n\n\t\t\t// Ensure the named link is a valid HTML ID attribute\n\t\t\ttry {\n\t\t\t\telement = document.getElementById( decodeURIComponent( name ) );\n\t\t\t}\n\t\t\tcatch ( error ) { }\n\n\t\t\tif( element ) {\n\t\t\t\treturn { ...this.Reveal.getIndices( element ), f };\n\t\t\t}\n\t\t}\n\t\telse {\n\t\t\tconst config = this.Reveal.getConfig();\n\t\t\tlet hashIndexBase = config.hashOneBasedIndex ? 1 : 0;\n\n\t\t\t// Read the index components of the hash\n\t\t\tlet h = ( parseInt( bits[0], 10 ) - hashIndexBase ) || 0,\n\t\t\t\tv = ( parseInt( bits[1], 10 ) - hashIndexBase ) || 0,\n\t\t\t\tf;\n\n\t\t\tif( config.fragmentInURL ) {\n\t\t\t\tf = parseInt( bits[2], 10 );\n\t\t\t\tif( isNaN( f ) ) {\n\t\t\t\t\tf = undefined;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\treturn { h, v, f };\n\t\t}\n\n\t\t// The hash couldn't be parsed or no matching named link was found\n\t\treturn null\n\n\t}\n\n\t/**\n\t * Reads the current URL (hash) and navigates accordingly.\n\t */\n\treadURL() {\n\n\t\tconst currentIndices = this.Reveal.getIndices();\n\t\tconst newIndices = this.getIndicesFromHash();\n\n\t\tif( newIndices ) {\n\t\t\tif( ( newIndices.h !== currentIndices.h || newIndices.v !== currentIndices.v || newIndices.f !== undefined ) ) {\n\t\t\t\t\tthis.Reveal.slide( newIndices.h, newIndices.v, newIndices.f );\n\t\t\t}\n\t\t}\n\t\t// If no new indices are available, we're trying to navigate to\n\t\t// a slide hash that does not exist\n\t\telse {\n\t\t\tthis.Reveal.slide( currentIndices.h || 0, currentIndices.v || 0 );\n\t\t}\n\n\t}\n\n\t/**\n\t * Updates the page URL (hash) to reflect the current\n\t * state.\n\t *\n\t * @param {number} delay The time in ms to wait before\n\t * writing the hash\n\t */\n\twriteURL( delay ) {\n\n\t\tlet config = this.Reveal.getConfig();\n\t\tlet currentSlide = this.Reveal.getCurrentSlide();\n\n\t\t// Make sure there's never more than one timeout running\n\t\tclearTimeout( this.writeURLTimeout );\n\n\t\t// If a delay is specified, timeout this call\n\t\tif( typeof delay === 'number' ) {\n\t\t\tthis.writeURLTimeout = setTimeout( this.writeURL, delay );\n\t\t}\n\t\telse if( currentSlide ) {\n\n\t\t\tlet hash = this.getHash();\n\n\t\t\t// If we're configured to push to history OR the history\n\t\t\t// API is not avaialble.\n\t\t\tif( config.history ) {\n\t\t\t\twindow.location.hash = hash;\n\t\t\t}\n\t\t\t// If we're configured to reflect the current slide in the\n\t\t\t// URL without pushing to history.\n\t\t\telse if( config.hash ) {\n\t\t\t\t// If the hash is empty, don't add it to the URL\n\t\t\t\tif( hash === '/' ) {\n\t\t\t\t\tthis.debouncedReplaceState( window.location.pathname + window.location.search );\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tthis.debouncedReplaceState( '#' + hash );\n\t\t\t\t}\n\t\t\t}\n\t\t\t// UPDATE: The below nuking of all hash changes breaks\n\t\t\t// anchors on pages where reveal.js is running. Removed\n\t\t\t// in 4.0. Why was it here in the first place? ¯\\_(ツ)_/¯\n\t\t\t//\n\t\t\t// If history and hash are both disabled, a hash may still\n\t\t\t// be added to the URL by clicking on a href with a hash\n\t\t\t// target. Counter this by always removing the hash.\n\t\t\t// else {\n\t\t\t// \twindow.history.replaceState( null, null, window.location.pathname + window.location.search );\n\t\t\t// }\n\n\t\t}\n\n\t}\n\n\treplaceState( url ) {\n\n\t\twindow.history.replaceState( null, null, url );\n\t\tthis.replaceStateTimestamp = Date.now();\n\n\t}\n\n\tdebouncedReplaceState( url ) {\n\n\t\tclearTimeout( this.replaceStateTimeout );\n\n\t\tif( Date.now() - this.replaceStateTimestamp > this.MAX_REPLACE_STATE_FREQUENCY ) {\n\t\t\tthis.replaceState( url );\n\t\t}\n\t\telse {\n\t\t\tthis.replaceStateTimeout = setTimeout( () => this.replaceState( url ), this.MAX_REPLACE_STATE_FREQUENCY );\n\t\t}\n\n\t}\n\n\t/**\n\t * Return a hash URL that will resolve to the given slide location.\n\t *\n\t * @param {HTMLElement} [slide=currentSlide] The slide to link to\n\t */\n\tgetHash( slide ) {\n\n\t\tlet url = '/';\n\n\t\t// Attempt to create a named link based on the slide's ID\n\t\tlet s = slide || this.Reveal.getCurrentSlide();\n\t\tlet id = s ? s.getAttribute( 'id' ) : null;\n\t\tif( id ) {\n\t\t\tid = encodeURIComponent( id );\n\t\t}\n\n\t\tlet index = this.Reveal.getIndices( slide );\n\t\tif( !this.Reveal.getConfig().fragmentInURL ) {\n\t\t\tindex.f = undefined;\n\t\t}\n\n\t\t// If the current slide has an ID, use that as a named link,\n\t\t// but we don't support named links with a fragment index\n\t\tif( typeof id === 'string' && id.length ) {\n\t\t\turl = '/' + id;\n\n\t\t\t// If there is also a fragment, append that at the end\n\t\t\t// of the named link, like: #/named-link/2\n\t\t\tif( index.f >= 0 ) url += '/' + index.f;\n\t\t}\n\t\t// Otherwise use the /h/v index\n\t\telse {\n\t\t\tlet hashIndexBase = this.Reveal.getConfig().hashOneBasedIndex ? 1 : 0;\n\t\t\tif( index.h > 0 || index.v > 0 || index.f >= 0 ) url += index.h + hashIndexBase;\n\t\t\tif( index.v > 0 || index.f >= 0 ) url += '/' + (index.v + hashIndexBase );\n\t\t\tif( index.f >= 0 ) url += '/' + index.f;\n\t\t}\n\n\t\treturn url;\n\n\t}\n\n\t/**\n\t * Handler for the window level 'hashchange' event.\n\t *\n\t * @param {object} [event]\n\t */\n\tonWindowHashChange( event ) {\n\n\t\tthis.readURL();\n\n\t}\n\n}","import { queryAll } from '../utils/util.js'\nimport { isAndroid } from '../utils/device.js'\n\n/**\n * Manages our presentation controls. This includes both\n * the built-in control arrows as well as event monitoring\n * of any elements within the presentation with either of the\n * following helper classes:\n * - .navigate-up\n * - .navigate-right\n * - .navigate-down\n * - .navigate-left\n * - .navigate-next\n * - .navigate-prev\n */\nexport default class Controls {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t\tthis.onNavigateLeftClicked = this.onNavigateLeftClicked.bind( this );\n\t\tthis.onNavigateRightClicked = this.onNavigateRightClicked.bind( this );\n\t\tthis.onNavigateUpClicked = this.onNavigateUpClicked.bind( this );\n\t\tthis.onNavigateDownClicked = this.onNavigateDownClicked.bind( this );\n\t\tthis.onNavigatePrevClicked = this.onNavigatePrevClicked.bind( this );\n\t\tthis.onNavigateNextClicked = this.onNavigateNextClicked.bind( this );\n\n\t}\n\n\trender() {\n\n\t\tconst rtl = this.Reveal.getConfig().rtl;\n\t\tconst revealElement = this.Reveal.getRevealElement();\n\n\t\tthis.element = document.createElement( 'aside' );\n\t\tthis.element.className = 'controls';\n\t\tthis.element.innerHTML =\n\t\t\t`\n\t\t\t\n\t\t\t\n\t\t\t`;\n\n\t\tthis.Reveal.getRevealElement().appendChild( this.element );\n\n\t\t// There can be multiple instances of controls throughout the page\n\t\tthis.controlsLeft = queryAll( revealElement, '.navigate-left' );\n\t\tthis.controlsRight = queryAll( revealElement, '.navigate-right' );\n\t\tthis.controlsUp = queryAll( revealElement, '.navigate-up' );\n\t\tthis.controlsDown = queryAll( revealElement, '.navigate-down' );\n\t\tthis.controlsPrev = queryAll( revealElement, '.navigate-prev' );\n\t\tthis.controlsNext = queryAll( revealElement, '.navigate-next' );\n\n\t\t// The left, right and down arrows in the standard reveal.js controls\n\t\tthis.controlsRightArrow = this.element.querySelector( '.navigate-right' );\n\t\tthis.controlsLeftArrow = this.element.querySelector( '.navigate-left' );\n\t\tthis.controlsDownArrow = this.element.querySelector( '.navigate-down' );\n\n\t}\n\n\t/**\n\t * Called when the reveal.js config is updated.\n\t */\n\tconfigure( config, oldConfig ) {\n\n\t\tthis.element.style.display = config.controls ? 'block' : 'none';\n\n\t\tthis.element.setAttribute( 'data-controls-layout', config.controlsLayout );\n\t\tthis.element.setAttribute( 'data-controls-back-arrows', config.controlsBackArrows );\n\n\t}\n\n\tbind() {\n\n\t\t// Listen to both touch and click events, in case the device\n\t\t// supports both\n\t\tlet pointerEvents = [ 'touchstart', 'click' ];\n\n\t\t// Only support touch for Android, fixes double navigations in\n\t\t// stock browser\n\t\tif( isAndroid ) {\n\t\t\tpointerEvents = [ 'touchstart' ];\n\t\t}\n\n\t\tpointerEvents.forEach( eventName => {\n\t\t\tthis.controlsLeft.forEach( el => el.addEventListener( eventName, this.onNavigateLeftClicked, false ) );\n\t\t\tthis.controlsRight.forEach( el => el.addEventListener( eventName, this.onNavigateRightClicked, false ) );\n\t\t\tthis.controlsUp.forEach( el => el.addEventListener( eventName, this.onNavigateUpClicked, false ) );\n\t\t\tthis.controlsDown.forEach( el => el.addEventListener( eventName, this.onNavigateDownClicked, false ) );\n\t\t\tthis.controlsPrev.forEach( el => el.addEventListener( eventName, this.onNavigatePrevClicked, false ) );\n\t\t\tthis.controlsNext.forEach( el => el.addEventListener( eventName, this.onNavigateNextClicked, false ) );\n\t\t} );\n\n\t}\n\n\tunbind() {\n\n\t\t[ 'touchstart', 'click' ].forEach( eventName => {\n\t\t\tthis.controlsLeft.forEach( el => el.removeEventListener( eventName, this.onNavigateLeftClicked, false ) );\n\t\t\tthis.controlsRight.forEach( el => el.removeEventListener( eventName, this.onNavigateRightClicked, false ) );\n\t\t\tthis.controlsUp.forEach( el => el.removeEventListener( eventName, this.onNavigateUpClicked, false ) );\n\t\t\tthis.controlsDown.forEach( el => el.removeEventListener( eventName, this.onNavigateDownClicked, false ) );\n\t\t\tthis.controlsPrev.forEach( el => el.removeEventListener( eventName, this.onNavigatePrevClicked, false ) );\n\t\t\tthis.controlsNext.forEach( el => el.removeEventListener( eventName, this.onNavigateNextClicked, false ) );\n\t\t} );\n\n\t}\n\n\t/**\n\t * Updates the state of all control/navigation arrows.\n\t */\n\tupdate() {\n\n\t\tlet routes = this.Reveal.availableRoutes();\n\n\t\t// Remove the 'enabled' class from all directions\n\t\t[...this.controlsLeft, ...this.controlsRight, ...this.controlsUp, ...this.controlsDown, ...this.controlsPrev, ...this.controlsNext].forEach( node => {\n\t\t\tnode.classList.remove( 'enabled', 'fragmented' );\n\n\t\t\t// Set 'disabled' attribute on all directions\n\t\t\tnode.setAttribute( 'disabled', 'disabled' );\n\t\t} );\n\n\t\t// Add the 'enabled' class to the available routes; remove 'disabled' attribute to enable buttons\n\t\tif( routes.left ) this.controlsLeft.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );\n\t\tif( routes.right ) this.controlsRight.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );\n\t\tif( routes.up ) this.controlsUp.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );\n\t\tif( routes.down ) this.controlsDown.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );\n\n\t\t// Prev/next buttons\n\t\tif( routes.left || routes.up ) this.controlsPrev.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );\n\t\tif( routes.right || routes.down ) this.controlsNext.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );\n\n\t\t// Highlight fragment directions\n\t\tlet currentSlide = this.Reveal.getCurrentSlide();\n\t\tif( currentSlide ) {\n\n\t\t\tlet fragmentsRoutes = this.Reveal.fragments.availableRoutes();\n\n\t\t\t// Always apply fragment decorator to prev/next buttons\n\t\t\tif( fragmentsRoutes.prev ) this.controlsPrev.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );\n\t\t\tif( fragmentsRoutes.next ) this.controlsNext.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );\n\n\t\t\t// Apply fragment decorators to directional buttons based on\n\t\t\t// what slide axis they are in\n\t\t\tif( this.Reveal.isVerticalSlide( currentSlide ) ) {\n\t\t\t\tif( fragmentsRoutes.prev ) this.controlsUp.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );\n\t\t\t\tif( fragmentsRoutes.next ) this.controlsDown.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );\n\t\t\t}\n\t\t\telse {\n\t\t\t\tif( fragmentsRoutes.prev ) this.controlsLeft.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );\n\t\t\t\tif( fragmentsRoutes.next ) this.controlsRight.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );\n\t\t\t}\n\n\t\t}\n\n\t\tif( this.Reveal.getConfig().controlsTutorial ) {\n\n\t\t\tlet indices = this.Reveal.getIndices();\n\n\t\t\t// Highlight control arrows with an animation to ensure\n\t\t\t// that the viewer knows how to navigate\n\t\t\tif( !this.Reveal.hasNavigatedVertically() && routes.down ) {\n\t\t\t\tthis.controlsDownArrow.classList.add( 'highlight' );\n\t\t\t}\n\t\t\telse {\n\t\t\t\tthis.controlsDownArrow.classList.remove( 'highlight' );\n\n\t\t\t\tif( this.Reveal.getConfig().rtl ) {\n\n\t\t\t\t\tif( !this.Reveal.hasNavigatedHorizontally() && routes.left && indices.v === 0 ) {\n\t\t\t\t\t\tthis.controlsLeftArrow.classList.add( 'highlight' );\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tthis.controlsLeftArrow.classList.remove( 'highlight' );\n\t\t\t\t\t}\n\n\t\t\t\t} else {\n\n\t\t\t\t\tif( !this.Reveal.hasNavigatedHorizontally() && routes.right && indices.v === 0 ) {\n\t\t\t\t\t\tthis.controlsRightArrow.classList.add( 'highlight' );\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tthis.controlsRightArrow.classList.remove( 'highlight' );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\tdestroy() {\n\n\t\tthis.unbind();\n\t\tthis.element.remove();\n\n\t}\n\n\t/**\n\t * Event handlers for navigation control buttons.\n\t */\n\tonNavigateLeftClicked( event ) {\n\n\t\tevent.preventDefault();\n\t\tthis.Reveal.onUserInput();\n\n\t\tif( this.Reveal.getConfig().navigationMode === 'linear' ) {\n\t\t\tthis.Reveal.prev();\n\t\t}\n\t\telse {\n\t\t\tthis.Reveal.left();\n\t\t}\n\n\t}\n\n\tonNavigateRightClicked( event ) {\n\n\t\tevent.preventDefault();\n\t\tthis.Reveal.onUserInput();\n\n\t\tif( this.Reveal.getConfig().navigationMode === 'linear' ) {\n\t\t\tthis.Reveal.next();\n\t\t}\n\t\telse {\n\t\t\tthis.Reveal.right();\n\t\t}\n\n\t}\n\n\tonNavigateUpClicked( event ) {\n\n\t\tevent.preventDefault();\n\t\tthis.Reveal.onUserInput();\n\n\t\tthis.Reveal.up();\n\n\t}\n\n\tonNavigateDownClicked( event ) {\n\n\t\tevent.preventDefault();\n\t\tthis.Reveal.onUserInput();\n\n\t\tthis.Reveal.down();\n\n\t}\n\n\tonNavigatePrevClicked( event ) {\n\n\t\tevent.preventDefault();\n\t\tthis.Reveal.onUserInput();\n\n\t\tthis.Reveal.prev();\n\n\t}\n\n\tonNavigateNextClicked( event ) {\n\n\t\tevent.preventDefault();\n\t\tthis.Reveal.onUserInput();\n\n\t\tthis.Reveal.next();\n\n\t}\n\n\n}","/**\n * Creates a visual progress bar for the presentation.\n */\nexport default class Progress {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t\tthis.onProgressClicked = this.onProgressClicked.bind( this );\n\n\t}\n\n\trender() {\n\n\t\tthis.element = document.createElement( 'div' );\n\t\tthis.element.className = 'progress';\n\t\tthis.Reveal.getRevealElement().appendChild( this.element );\n\n\t\tthis.bar = document.createElement( 'span' );\n\t\tthis.element.appendChild( this.bar );\n\n\t}\n\n\t/**\n\t * Called when the reveal.js config is updated.\n\t */\n\tconfigure( config, oldConfig ) {\n\n\t\tthis.element.style.display = config.progress ? 'block' : 'none';\n\n\t}\n\n\tbind() {\n\n\t\tif( this.Reveal.getConfig().progress && this.element ) {\n\t\t\tthis.element.addEventListener( 'click', this.onProgressClicked, false );\n\t\t}\n\n\t}\n\n\tunbind() {\n\n\t\tif ( this.Reveal.getConfig().progress && this.element ) {\n\t\t\tthis.element.removeEventListener( 'click', this.onProgressClicked, false );\n\t\t}\n\n\t}\n\n\t/**\n\t * Updates the progress bar to reflect the current slide.\n\t */\n\tupdate() {\n\n\t\t// Update progress if enabled\n\t\tif( this.Reveal.getConfig().progress && this.bar ) {\n\n\t\t\tlet scale = this.Reveal.getProgress();\n\n\t\t\t// Don't fill the progress bar if there's only one slide\n\t\t\tif( this.Reveal.getTotalSlides() < 2 ) {\n\t\t\t\tscale = 0;\n\t\t\t}\n\n\t\t\tthis.bar.style.transform = 'scaleX('+ scale +')';\n\n\t\t}\n\n\t}\n\n\tgetMaxWidth() {\n\n\t\treturn this.Reveal.getRevealElement().offsetWidth;\n\n\t}\n\n\t/**\n\t * Clicking on the progress bar results in a navigation to the\n\t * closest approximate horizontal slide using this equation:\n\t *\n\t * ( clickX / presentationWidth ) * numberOfSlides\n\t *\n\t * @param {object} event\n\t */\n\tonProgressClicked( event ) {\n\n\t\tthis.Reveal.onUserInput( event );\n\n\t\tevent.preventDefault();\n\n\t\tlet slides = this.Reveal.getSlides();\n\t\tlet slidesTotal = slides.length;\n\t\tlet slideIndex = Math.floor( ( event.clientX / this.getMaxWidth() ) * slidesTotal );\n\n\t\tif( this.Reveal.getConfig().rtl ) {\n\t\t\tslideIndex = slidesTotal - slideIndex;\n\t\t}\n\n\t\tlet targetIndices = this.Reveal.getIndices(slides[slideIndex]);\n\t\tthis.Reveal.slide( targetIndices.h, targetIndices.v );\n\n\t}\n\n\tdestroy() {\n\n\t\tthis.element.remove();\n\n\t}\n\n}","/**\n * Handles hiding of the pointer/cursor when inactive.\n */\nexport default class Pointer {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t\t// Throttles mouse wheel navigation\n\t\tthis.lastMouseWheelStep = 0;\n\n\t\t// Is the mouse pointer currently hidden from view\n\t\tthis.cursorHidden = false;\n\n\t\t// Timeout used to determine when the cursor is inactive\n\t\tthis.cursorInactiveTimeout = 0;\n\n\t\tthis.onDocumentCursorActive = this.onDocumentCursorActive.bind( this );\n\t\tthis.onDocumentMouseScroll = this.onDocumentMouseScroll.bind( this );\n\n\t}\n\n\t/**\n\t * Called when the reveal.js config is updated.\n\t */\n\tconfigure( config, oldConfig ) {\n\n\t\tif( config.mouseWheel ) {\n\t\t\tdocument.addEventListener( 'DOMMouseScroll', this.onDocumentMouseScroll, false ); // FF\n\t\t\tdocument.addEventListener( 'mousewheel', this.onDocumentMouseScroll, false );\n\t\t}\n\t\telse {\n\t\t\tdocument.removeEventListener( 'DOMMouseScroll', this.onDocumentMouseScroll, false ); // FF\n\t\t\tdocument.removeEventListener( 'mousewheel', this.onDocumentMouseScroll, false );\n\t\t}\n\n\t\t// Auto-hide the mouse pointer when its inactive\n\t\tif( config.hideInactiveCursor ) {\n\t\t\tdocument.addEventListener( 'mousemove', this.onDocumentCursorActive, false );\n\t\t\tdocument.addEventListener( 'mousedown', this.onDocumentCursorActive, false );\n\t\t}\n\t\telse {\n\t\t\tthis.showCursor();\n\n\t\t\tdocument.removeEventListener( 'mousemove', this.onDocumentCursorActive, false );\n\t\t\tdocument.removeEventListener( 'mousedown', this.onDocumentCursorActive, false );\n\t\t}\n\n\t}\n\n\t/**\n\t * Shows the mouse pointer after it has been hidden with\n\t * #hideCursor.\n\t */\n\tshowCursor() {\n\n\t\tif( this.cursorHidden ) {\n\t\t\tthis.cursorHidden = false;\n\t\t\tthis.Reveal.getRevealElement().style.cursor = '';\n\t\t}\n\n\t}\n\n\t/**\n\t * Hides the mouse pointer when it's on top of the .reveal\n\t * container.\n\t */\n\thideCursor() {\n\n\t\tif( this.cursorHidden === false ) {\n\t\t\tthis.cursorHidden = true;\n\t\t\tthis.Reveal.getRevealElement().style.cursor = 'none';\n\t\t}\n\n\t}\n\n\tdestroy() {\n\n\t\tthis.showCursor();\n\n\t\tdocument.removeEventListener( 'DOMMouseScroll', this.onDocumentMouseScroll, false );\n\t\tdocument.removeEventListener( 'mousewheel', this.onDocumentMouseScroll, false );\n\t\tdocument.removeEventListener( 'mousemove', this.onDocumentCursorActive, false );\n\t\tdocument.removeEventListener( 'mousedown', this.onDocumentCursorActive, false );\n\n\t}\n\n\t/**\n\t * Called whenever there is mouse input at the document level\n\t * to determine if the cursor is active or not.\n\t *\n\t * @param {object} event\n\t */\n\tonDocumentCursorActive( event ) {\n\n\t\tthis.showCursor();\n\n\t\tclearTimeout( this.cursorInactiveTimeout );\n\n\t\tthis.cursorInactiveTimeout = setTimeout( this.hideCursor.bind( this ), this.Reveal.getConfig().hideCursorTime );\n\n\t}\n\n\t/**\n\t * Handles mouse wheel scrolling, throttled to avoid skipping\n\t * multiple slides.\n\t *\n\t * @param {object} event\n\t */\n\tonDocumentMouseScroll( event ) {\n\n\t\tif( Date.now() - this.lastMouseWheelStep > 1000 ) {\n\n\t\t\tthis.lastMouseWheelStep = Date.now();\n\n\t\t\tlet delta = event.detail || -event.wheelDelta;\n\t\t\tif( delta > 0 ) {\n\t\t\t\tthis.Reveal.next();\n\t\t\t}\n\t\t\telse if( delta < 0 ) {\n\t\t\t\tthis.Reveal.prev();\n\t\t\t}\n\n\t\t}\n\n\t}\n\n}","/**\n * Loads a JavaScript file from the given URL and executes it.\n *\n * @param {string} url Address of the .js file to load\n * @param {function} callback Method to invoke when the script\n * has loaded and executed\n */\nexport const loadScript = ( url, callback ) => {\n\n\tconst script = document.createElement( 'script' );\n\tscript.type = 'text/javascript';\n\tscript.async = false;\n\tscript.defer = false;\n\tscript.src = url;\n\n\tif( typeof callback === 'function' ) {\n\n\t\t// Success callback\n\t\tscript.onload = script.onreadystatechange = event => {\n\t\t\tif( event.type === 'load' || /loaded|complete/.test( script.readyState ) ) {\n\n\t\t\t\t// Kill event listeners\n\t\t\t\tscript.onload = script.onreadystatechange = script.onerror = null;\n\n\t\t\t\tcallback();\n\n\t\t\t}\n\t\t};\n\n\t\t// Error callback\n\t\tscript.onerror = err => {\n\n\t\t\t// Kill event listeners\n\t\t\tscript.onload = script.onreadystatechange = script.onerror = null;\n\n\t\t\tcallback( new Error( 'Failed loading script: ' + script.src + '\\n' + err ) );\n\n\t\t};\n\n\t}\n\n\t// Append the script at the end of \n\tconst head = document.querySelector( 'head' );\n\thead.insertBefore( script, head.lastChild );\n\n}","import { loadScript } from '../utils/loader.js'\n\n/**\n * Manages loading and registering of reveal.js plugins.\n */\nexport default class Plugins {\n\n\tconstructor( reveal ) {\n\n\t\tthis.Reveal = reveal;\n\n\t\t// Flags our current state (idle -> loading -> loaded)\n\t\tthis.state = 'idle';\n\n\t\t// An id:instance map of currently registed plugins\n\t\tthis.registeredPlugins = {};\n\n\t\tthis.asyncDependencies = [];\n\n\t}\n\n\t/**\n\t * Loads reveal.js dependencies, registers and\n\t * initializes plugins.\n\t *\n\t * Plugins are direct references to a reveal.js plugin\n\t * object that we register and initialize after any\n\t * synchronous dependencies have loaded.\n\t *\n\t * Dependencies are defined via the 'dependencies' config\n\t * option and will be loaded prior to starting reveal.js.\n\t * Some dependencies may have an 'async' flag, if so they\n\t * will load after reveal.js has been started up.\n\t */\n\tload( plugins, dependencies ) {\n\n\t\tthis.state = 'loading';\n\n\t\tplugins.forEach( this.registerPlugin.bind( this ) );\n\n\t\treturn new Promise( resolve => {\n\n\t\t\tlet scripts = [],\n\t\t\t\tscriptsToLoad = 0;\n\n\t\t\tdependencies.forEach( s => {\n\t\t\t\t// Load if there's no condition or the condition is truthy\n\t\t\t\tif( !s.condition || s.condition() ) {\n\t\t\t\t\tif( s.async ) {\n\t\t\t\t\t\tthis.asyncDependencies.push( s );\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tscripts.push( s );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t} );\n\n\t\t\tif( scripts.length ) {\n\t\t\t\tscriptsToLoad = scripts.length;\n\n\t\t\t\tconst scriptLoadedCallback = (s) => {\n\t\t\t\t\tif( s && typeof s.callback === 'function' ) s.callback();\n\n\t\t\t\t\tif( --scriptsToLoad === 0 ) {\n\t\t\t\t\t\tthis.initPlugins().then( resolve );\n\t\t\t\t\t}\n\t\t\t\t};\n\n\t\t\t\t// Load synchronous scripts\n\t\t\t\tscripts.forEach( s => {\n\t\t\t\t\tif( typeof s.id === 'string' ) {\n\t\t\t\t\t\tthis.registerPlugin( s );\n\t\t\t\t\t\tscriptLoadedCallback( s );\n\t\t\t\t\t}\n\t\t\t\t\telse if( typeof s.src === 'string' ) {\n\t\t\t\t\t\tloadScript( s.src, () => scriptLoadedCallback(s) );\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tconsole.warn( 'Unrecognized plugin format', s );\n\t\t\t\t\t\tscriptLoadedCallback();\n\t\t\t\t\t}\n\t\t\t\t} );\n\t\t\t}\n\t\t\telse {\n\t\t\t\tthis.initPlugins().then( resolve );\n\t\t\t}\n\n\t\t} );\n\n\t}\n\n\t/**\n\t * Initializes our plugins and waits for them to be ready\n\t * before proceeding.\n\t */\n\tinitPlugins() {\n\n\t\treturn new Promise( resolve => {\n\n\t\t\tlet pluginValues = Object.values( this.registeredPlugins );\n\t\t\tlet pluginsToInitialize = pluginValues.length;\n\n\t\t\t// If there are no plugins, skip this step\n\t\t\tif( pluginsToInitialize === 0 ) {\n\t\t\t\tthis.loadAsync().then( resolve );\n\t\t\t}\n\t\t\t// ... otherwise initialize plugins\n\t\t\telse {\n\n\t\t\t\tlet initNextPlugin;\n\n\t\t\t\tlet afterPlugInitialized = () => {\n\t\t\t\t\tif( --pluginsToInitialize === 0 ) {\n\t\t\t\t\t\tthis.loadAsync().then( resolve );\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tinitNextPlugin();\n\t\t\t\t\t}\n\t\t\t\t};\n\n\t\t\t\tlet i = 0;\n\n\t\t\t\t// Initialize plugins serially\n\t\t\t\tinitNextPlugin = () => {\n\n\t\t\t\t\tlet plugin = pluginValues[i++];\n\n\t\t\t\t\t// If the plugin has an 'init' method, invoke it\n\t\t\t\t\tif( typeof plugin.init === 'function' ) {\n\t\t\t\t\t\tlet promise = plugin.init( this.Reveal );\n\n\t\t\t\t\t\t// If the plugin returned a Promise, wait for it\n\t\t\t\t\t\tif( promise && typeof promise.then === 'function' ) {\n\t\t\t\t\t\t\tpromise.then( afterPlugInitialized );\n\t\t\t\t\t\t}\n\t\t\t\t\t\telse {\n\t\t\t\t\t\t\tafterPlugInitialized();\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tafterPlugInitialized();\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t\tinitNextPlugin();\n\n\t\t\t}\n\n\t\t} )\n\n\t}\n\n\t/**\n\t * Loads all async reveal.js dependencies.\n\t */\n\tloadAsync() {\n\n\t\tthis.state = 'loaded';\n\n\t\tif( this.asyncDependencies.length ) {\n\t\t\tthis.asyncDependencies.forEach( s => {\n\t\t\t\tloadScript( s.src, s.callback );\n\t\t\t} );\n\t\t}\n\n\t\treturn Promise.resolve();\n\n\t}\n\n\t/**\n\t * Registers a new plugin with this reveal.js instance.\n\t *\n\t * reveal.js waits for all regisered plugins to initialize\n\t * before considering itself ready, as long as the plugin\n\t * is registered before calling `Reveal.initialize()`.\n\t */\n\tregisterPlugin( plugin ) {\n\n\t\t// Backwards compatibility to make reveal.js ~3.9.0\n\t\t// plugins work with reveal.js 4.0.0\n\t\tif( arguments.length === 2 && typeof arguments[0] === 'string' ) {\n\t\t\tplugin = arguments[1];\n\t\t\tplugin.id = arguments[0];\n\t\t}\n\t\t// Plugin can optionally be a function which we call\n\t\t// to create an instance of the plugin\n\t\telse if( typeof plugin === 'function' ) {\n\t\t\tplugin = plugin();\n\t\t}\n\n\t\tlet id = plugin.id;\n\n\t\tif( typeof id !== 'string' ) {\n\t\t\tconsole.warn( 'Unrecognized plugin format; can\\'t find plugin.id', plugin );\n\t\t}\n\t\telse if( this.registeredPlugins[id] === undefined ) {\n\t\t\tthis.registeredPlugins[id] = plugin;\n\n\t\t\t// If a plugin is registered after reveal.js is loaded,\n\t\t\t// initialize it right away\n\t\t\tif( this.state === 'loaded' && typeof plugin.init === 'function' ) {\n\t\t\t\tplugin.init( this.Reveal );\n\t\t\t}\n\t\t}\n\t\telse {\n\t\t\tconsole.warn( 'reveal.js: \"'+ id +'\" plugin has already been registered' );\n\t\t}\n\n\t}\n\n\t/**\n\t * Checks if a specific plugin has been registered.\n\t *\n\t * @param {String} id Unique plugin identifier\n\t */\n\thasPlugin( id ) {\n\n\t\treturn !!this.registeredPlugins[id];\n\n\t}\n\n\t/**\n\t * Returns the specific plugin instance, if a plugin\n\t * with the given ID has been registered.\n\t *\n\t * @param {String} id Unique plugin identifier\n\t */\n\tgetPlugin( id ) {\n\n\t\treturn this.registeredPlugins[id];\n\n\t}\n\n\tgetRegisteredPlugins() {\n\n\t\treturn this.registeredPlugins;\n\n\t}\n\n\tdestroy() {\n\n\t\tObject.values( this.registeredPlugins ).forEach( plugin => {\n\t\t\tif( typeof plugin.destroy === 'function' ) {\n\t\t\t\tplugin.destroy();\n\t\t\t}\n\t\t} );\n\n\t\tthis.registeredPlugins = {};\n\t\tthis.asyncDependencies = [];\n\n\t}\n\n}\n","import { SLIDES_SELECTOR } from '../utils/constants.js'\nimport { queryAll, createStyleSheet } from '../utils/util.js'\n\n/**\n * Setups up our presentation for printing/exporting to PDF.\n */\nexport default class Print {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t}\n\n\t/**\n\t * Configures the presentation for printing to a static\n\t * PDF.\n\t */\n\tasync setupPDF() {\n\n\t\tconst config = this.Reveal.getConfig();\n\t\tconst slides = queryAll( this.Reveal.getRevealElement(), SLIDES_SELECTOR )\n\n\t\t// Compute slide numbers now, before we start duplicating slides\n\t\tconst doingSlideNumbers = config.slideNumber && /all|print/i.test( config.showSlideNumber );\n\n\t\tconst slideSize = this.Reveal.getComputedSlideSize( window.innerWidth, window.innerHeight );\n\n\t\t// Dimensions of the PDF pages\n\t\tconst pageWidth = Math.floor( slideSize.width * ( 1 + config.margin ) ),\n\t\t\tpageHeight = Math.floor( slideSize.height * ( 1 + config.margin ) );\n\n\t\t// Dimensions of slides within the pages\n\t\tconst slideWidth = slideSize.width,\n\t\t\tslideHeight = slideSize.height;\n\n\t\tawait new Promise( requestAnimationFrame );\n\n\t\t// Let the browser know what page size we want to print\n\t\tcreateStyleSheet( '@page{size:'+ pageWidth +'px '+ pageHeight +'px; margin: 0px;}' );\n\n\t\t// Limit the size of certain elements to the dimensions of the slide\n\t\tcreateStyleSheet( '.reveal section>img, .reveal section>video, .reveal section>iframe{max-width: '+ slideWidth +'px; max-height:'+ slideHeight +'px}' );\n\n\t\tdocument.documentElement.classList.add( 'print-pdf' );\n\t\tdocument.body.style.width = pageWidth + 'px';\n\t\tdocument.body.style.height = pageHeight + 'px';\n\n\t\tconst viewportElement = document.querySelector( '.reveal-viewport' );\n\t\tlet presentationBackground;\n\t\tif( viewportElement ) {\n\t\t\tconst viewportStyles = window.getComputedStyle( viewportElement );\n\t\t\tif( viewportStyles && viewportStyles.background ) {\n\t\t\t\tpresentationBackground = viewportStyles.background;\n\t\t\t}\n\t\t}\n\n\t\t// Make sure stretch elements fit on slide\n\t\tawait new Promise( requestAnimationFrame );\n\t\tthis.Reveal.layoutSlideContents( slideWidth, slideHeight );\n\n\t\t// Batch scrollHeight access to prevent layout thrashing\n\t\tawait new Promise( requestAnimationFrame );\n\n\t\tconst slideScrollHeights = slides.map( slide => slide.scrollHeight );\n\n\t\tconst pages = [];\n\t\tconst pageContainer = slides[0].parentNode;\n\n\t\t// Slide and slide background layout\n\t\tslides.forEach( function( slide, index ) {\n\n\t\t\t// Vertical stacks are not centred since their section\n\t\t\t// children will be\n\t\t\tif( slide.classList.contains( 'stack' ) === false ) {\n\t\t\t\t// Center the slide inside of the page, giving the slide some margin\n\t\t\t\tlet left = ( pageWidth - slideWidth ) / 2;\n\t\t\t\tlet top = ( pageHeight - slideHeight ) / 2;\n\n\t\t\t\tconst contentHeight = slideScrollHeights[ index ];\n\t\t\t\tlet numberOfPages = Math.max( Math.ceil( contentHeight / pageHeight ), 1 );\n\n\t\t\t\t// Adhere to configured pages per slide limit\n\t\t\t\tnumberOfPages = Math.min( numberOfPages, config.pdfMaxPagesPerSlide );\n\n\t\t\t\t// Center slides vertically\n\t\t\t\tif( numberOfPages === 1 && config.center || slide.classList.contains( 'center' ) ) {\n\t\t\t\t\ttop = Math.max( ( pageHeight - contentHeight ) / 2, 0 );\n\t\t\t\t}\n\n\t\t\t\t// Wrap the slide in a page element and hide its overflow\n\t\t\t\t// so that no page ever flows onto another\n\t\t\t\tconst page = document.createElement( 'div' );\n\t\t\t\tpages.push( page );\n\n\t\t\t\tpage.className = 'pdf-page';\n\t\t\t\tpage.style.height = ( ( pageHeight + config.pdfPageHeightOffset ) * numberOfPages ) + 'px';\n\n\t\t\t\t// Copy the presentation-wide background to each individual\n\t\t\t\t// page when printing\n\t\t\t\tif( presentationBackground ) {\n\t\t\t\t\tpage.style.background = presentationBackground;\n\t\t\t\t}\n\n\t\t\t\tpage.appendChild( slide );\n\n\t\t\t\t// Position the slide inside of the page\n\t\t\t\tslide.style.left = left + 'px';\n\t\t\t\tslide.style.top = top + 'px';\n\t\t\t\tslide.style.width = slideWidth + 'px';\n\n\t\t\t\t// Re-run the slide layout so that r-fit-text is applied based on\n\t\t\t\t// the printed slide size\n\t\t\t\tthis.Reveal.slideContent.layout( slide )\n\n\t\t\t\tif( slide.slideBackgroundElement ) {\n\t\t\t\t\tpage.insertBefore( slide.slideBackgroundElement, slide );\n\t\t\t\t}\n\n\t\t\t\t// Inject notes if `showNotes` is enabled\n\t\t\t\tif( config.showNotes ) {\n\n\t\t\t\t\t// Are there notes for this slide?\n\t\t\t\t\tconst notes = this.Reveal.getSlideNotes( slide );\n\t\t\t\t\tif( notes ) {\n\n\t\t\t\t\t\tconst notesSpacing = 8;\n\t\t\t\t\t\tconst notesLayout = typeof config.showNotes === 'string' ? config.showNotes : 'inline';\n\t\t\t\t\t\tconst notesElement = document.createElement( 'div' );\n\t\t\t\t\t\tnotesElement.classList.add( 'speaker-notes' );\n\t\t\t\t\t\tnotesElement.classList.add( 'speaker-notes-pdf' );\n\t\t\t\t\t\tnotesElement.setAttribute( 'data-layout', notesLayout );\n\t\t\t\t\t\tnotesElement.innerHTML = notes;\n\n\t\t\t\t\t\tif( notesLayout === 'separate-page' ) {\n\t\t\t\t\t\t\tpages.push( notesElement );\n\t\t\t\t\t\t}\n\t\t\t\t\t\telse {\n\t\t\t\t\t\t\tnotesElement.style.left = notesSpacing + 'px';\n\t\t\t\t\t\t\tnotesElement.style.bottom = notesSpacing + 'px';\n\t\t\t\t\t\t\tnotesElement.style.width = ( pageWidth - notesSpacing*2 ) + 'px';\n\t\t\t\t\t\t\tpage.appendChild( notesElement );\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t\t// Inject slide numbers if `slideNumbers` are enabled\n\t\t\t\tif( doingSlideNumbers ) {\n\t\t\t\t\tconst slideNumber = index + 1;\n\t\t\t\t\tconst numberElement = document.createElement( 'div' );\n\t\t\t\t\tnumberElement.classList.add( 'slide-number' );\n\t\t\t\t\tnumberElement.classList.add( 'slide-number-pdf' );\n\t\t\t\t\tnumberElement.innerHTML = slideNumber;\n\t\t\t\t\tpage.appendChild( numberElement );\n\t\t\t\t}\n\n\t\t\t\t// Copy page and show fragments one after another\n\t\t\t\tif( config.pdfSeparateFragments ) {\n\n\t\t\t\t\t// Each fragment 'group' is an array containing one or more\n\t\t\t\t\t// fragments. Multiple fragments that appear at the same time\n\t\t\t\t\t// are part of the same group.\n\t\t\t\t\tconst fragmentGroups = this.Reveal.fragments.sort( page.querySelectorAll( '.fragment' ), true );\n\n\t\t\t\t\tlet previousFragmentStep;\n\n\t\t\t\t\tfragmentGroups.forEach( function( fragments ) {\n\n\t\t\t\t\t\t// Remove 'current-fragment' from the previous group\n\t\t\t\t\t\tif( previousFragmentStep ) {\n\t\t\t\t\t\t\tpreviousFragmentStep.forEach( function( fragment ) {\n\t\t\t\t\t\t\t\tfragment.classList.remove( 'current-fragment' );\n\t\t\t\t\t\t\t} );\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\t// Show the fragments for the current index\n\t\t\t\t\t\tfragments.forEach( function( fragment ) {\n\t\t\t\t\t\t\tfragment.classList.add( 'visible', 'current-fragment' );\n\t\t\t\t\t\t}, this );\n\n\t\t\t\t\t\t// Create a separate page for the current fragment state\n\t\t\t\t\t\tconst clonedPage = page.cloneNode( true );\n\t\t\t\t\t\tpages.push( clonedPage );\n\n\t\t\t\t\t\tpreviousFragmentStep = fragments;\n\n\t\t\t\t\t}, this );\n\n\t\t\t\t\t// Reset the first/original page so that all fragments are hidden\n\t\t\t\t\tfragmentGroups.forEach( function( fragments ) {\n\t\t\t\t\t\tfragments.forEach( function( fragment ) {\n\t\t\t\t\t\t\tfragment.classList.remove( 'visible', 'current-fragment' );\n\t\t\t\t\t\t} );\n\t\t\t\t\t} );\n\n\t\t\t\t}\n\t\t\t\t// Show all fragments\n\t\t\t\telse {\n\t\t\t\t\tqueryAll( page, '.fragment:not(.fade-out)' ).forEach( function( fragment ) {\n\t\t\t\t\t\tfragment.classList.add( 'visible' );\n\t\t\t\t\t} );\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}, this );\n\n\t\tawait new Promise( requestAnimationFrame );\n\n\t\tpages.forEach( page => pageContainer.appendChild( page ) );\n\n\t\t// Notify subscribers that the PDF layout is good to go\n\t\tthis.Reveal.dispatchEvent({ type: 'pdf-ready' });\n\n\t}\n\n\t/**\n\t * Checks if this instance is being used to print a PDF.\n\t */\n\tisPrintingPDF() {\n\n\t\treturn ( /print-pdf/gi ).test( window.location.search );\n\n\t}\n\n}\n","import { isAndroid } from '../utils/device.js'\nimport { matches } from '../utils/util.js'\n\nconst SWIPE_THRESHOLD = 40;\n\n/**\n * Controls all touch interactions and navigations for\n * a presentation.\n */\nexport default class Touch {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t\t// Holds information about the currently ongoing touch interaction\n\t\tthis.touchStartX = 0;\n\t\tthis.touchStartY = 0;\n\t\tthis.touchStartCount = 0;\n\t\tthis.touchCaptured = false;\n\n\t\tthis.onPointerDown = this.onPointerDown.bind( this );\n\t\tthis.onPointerMove = this.onPointerMove.bind( this );\n\t\tthis.onPointerUp = this.onPointerUp.bind( this );\n\t\tthis.onTouchStart = this.onTouchStart.bind( this );\n\t\tthis.onTouchMove = this.onTouchMove.bind( this );\n\t\tthis.onTouchEnd = this.onTouchEnd.bind( this );\n\n\t}\n\n\t/**\n\t *\n\t */\n\tbind() {\n\n\t\tlet revealElement = this.Reveal.getRevealElement();\n\n\t\tif( 'onpointerdown' in window ) {\n\t\t\t// Use W3C pointer events\n\t\t\trevealElement.addEventListener( 'pointerdown', this.onPointerDown, false );\n\t\t\trevealElement.addEventListener( 'pointermove', this.onPointerMove, false );\n\t\t\trevealElement.addEventListener( 'pointerup', this.onPointerUp, false );\n\t\t}\n\t\telse if( window.navigator.msPointerEnabled ) {\n\t\t\t// IE 10 uses prefixed version of pointer events\n\t\t\trevealElement.addEventListener( 'MSPointerDown', this.onPointerDown, false );\n\t\t\trevealElement.addEventListener( 'MSPointerMove', this.onPointerMove, false );\n\t\t\trevealElement.addEventListener( 'MSPointerUp', this.onPointerUp, false );\n\t\t}\n\t\telse {\n\t\t\t// Fall back to touch events\n\t\t\trevealElement.addEventListener( 'touchstart', this.onTouchStart, false );\n\t\t\trevealElement.addEventListener( 'touchmove', this.onTouchMove, false );\n\t\t\trevealElement.addEventListener( 'touchend', this.onTouchEnd, false );\n\t\t}\n\n\t}\n\n\t/**\n\t *\n\t */\n\tunbind() {\n\n\t\tlet revealElement = this.Reveal.getRevealElement();\n\n\t\trevealElement.removeEventListener( 'pointerdown', this.onPointerDown, false );\n\t\trevealElement.removeEventListener( 'pointermove', this.onPointerMove, false );\n\t\trevealElement.removeEventListener( 'pointerup', this.onPointerUp, false );\n\n\t\trevealElement.removeEventListener( 'MSPointerDown', this.onPointerDown, false );\n\t\trevealElement.removeEventListener( 'MSPointerMove', this.onPointerMove, false );\n\t\trevealElement.removeEventListener( 'MSPointerUp', this.onPointerUp, false );\n\n\t\trevealElement.removeEventListener( 'touchstart', this.onTouchStart, false );\n\t\trevealElement.removeEventListener( 'touchmove', this.onTouchMove, false );\n\t\trevealElement.removeEventListener( 'touchend', this.onTouchEnd, false );\n\n\t}\n\n\t/**\n\t * Checks if the target element prevents the triggering of\n\t * swipe navigation.\n\t */\n\tisSwipePrevented( target ) {\n\n\t\t// Prevent accidental swipes when scrubbing timelines\n\t\tif( matches( target, 'video, audio' ) ) return true;\n\n\t\twhile( target && typeof target.hasAttribute === 'function' ) {\n\t\t\tif( target.hasAttribute( 'data-prevent-swipe' ) ) return true;\n\t\t\ttarget = target.parentNode;\n\t\t}\n\n\t\treturn false;\n\n\t}\n\n\t/**\n\t * Handler for the 'touchstart' event, enables support for\n\t * swipe and pinch gestures.\n\t *\n\t * @param {object} event\n\t */\n\tonTouchStart( event ) {\n\n\t\tif( this.isSwipePrevented( event.target ) ) return true;\n\n\t\tthis.touchStartX = event.touches[0].clientX;\n\t\tthis.touchStartY = event.touches[0].clientY;\n\t\tthis.touchStartCount = event.touches.length;\n\n\t}\n\n\t/**\n\t * Handler for the 'touchmove' event.\n\t *\n\t * @param {object} event\n\t */\n\tonTouchMove( event ) {\n\n\t\tif( this.isSwipePrevented( event.target ) ) return true;\n\n\t\tlet config = this.Reveal.getConfig();\n\n\t\t// Each touch should only trigger one action\n\t\tif( !this.touchCaptured ) {\n\t\t\tthis.Reveal.onUserInput( event );\n\n\t\t\tlet currentX = event.touches[0].clientX;\n\t\t\tlet currentY = event.touches[0].clientY;\n\n\t\t\t// There was only one touch point, look for a swipe\n\t\t\tif( event.touches.length === 1 && this.touchStartCount !== 2 ) {\n\n\t\t\t\tlet availableRoutes = this.Reveal.availableRoutes({ includeFragments: true });\n\n\t\t\t\tlet deltaX = currentX - this.touchStartX,\n\t\t\t\t\tdeltaY = currentY - this.touchStartY;\n\n\t\t\t\tif( deltaX > SWIPE_THRESHOLD && Math.abs( deltaX ) > Math.abs( deltaY ) ) {\n\t\t\t\t\tthis.touchCaptured = true;\n\t\t\t\t\tif( config.navigationMode === 'linear' ) {\n\t\t\t\t\t\tif( config.rtl ) {\n\t\t\t\t\t\t\tthis.Reveal.next();\n\t\t\t\t\t\t}\n\t\t\t\t\t\telse {\n\t\t\t\t\t\t\tthis.Reveal.prev();\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tthis.Reveal.left();\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\telse if( deltaX < -SWIPE_THRESHOLD && Math.abs( deltaX ) > Math.abs( deltaY ) ) {\n\t\t\t\t\tthis.touchCaptured = true;\n\t\t\t\t\tif( config.navigationMode === 'linear' ) {\n\t\t\t\t\t\tif( config.rtl ) {\n\t\t\t\t\t\t\tthis.Reveal.prev();\n\t\t\t\t\t\t}\n\t\t\t\t\t\telse {\n\t\t\t\t\t\t\tthis.Reveal.next();\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tthis.Reveal.right();\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\telse if( deltaY > SWIPE_THRESHOLD && availableRoutes.up ) {\n\t\t\t\t\tthis.touchCaptured = true;\n\t\t\t\t\tif( config.navigationMode === 'linear' ) {\n\t\t\t\t\t\tthis.Reveal.prev();\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tthis.Reveal.up();\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\telse if( deltaY < -SWIPE_THRESHOLD && availableRoutes.down ) {\n\t\t\t\t\tthis.touchCaptured = true;\n\t\t\t\t\tif( config.navigationMode === 'linear' ) {\n\t\t\t\t\t\tthis.Reveal.next();\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tthis.Reveal.down();\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\t// If we're embedded, only block touch events if they have\n\t\t\t\t// triggered an action\n\t\t\t\tif( config.embedded ) {\n\t\t\t\t\tif( this.touchCaptured || this.Reveal.isVerticalSlide() ) {\n\t\t\t\t\t\tevent.preventDefault();\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\t// Not embedded? Block them all to avoid needless tossing\n\t\t\t\t// around of the viewport in iOS\n\t\t\t\telse {\n\t\t\t\t\tevent.preventDefault();\n\t\t\t\t}\n\n\t\t\t}\n\t\t}\n\t\t// There's a bug with swiping on some Android devices unless\n\t\t// the default action is always prevented\n\t\telse if( isAndroid ) {\n\t\t\tevent.preventDefault();\n\t\t}\n\n\t}\n\n\t/**\n\t * Handler for the 'touchend' event.\n\t *\n\t * @param {object} event\n\t */\n\tonTouchEnd( event ) {\n\n\t\tthis.touchCaptured = false;\n\n\t}\n\n\t/**\n\t * Convert pointer down to touch start.\n\t *\n\t * @param {object} event\n\t */\n\tonPointerDown( event ) {\n\n\t\tif( event.pointerType === event.MSPOINTER_TYPE_TOUCH || event.pointerType === \"touch\" ) {\n\t\t\tevent.touches = [{ clientX: event.clientX, clientY: event.clientY }];\n\t\t\tthis.onTouchStart( event );\n\t\t}\n\n\t}\n\n\t/**\n\t * Convert pointer move to touch move.\n\t *\n\t * @param {object} event\n\t */\n\tonPointerMove( event ) {\n\n\t\tif( event.pointerType === event.MSPOINTER_TYPE_TOUCH || event.pointerType === \"touch\" ) {\n\t\t\tevent.touches = [{ clientX: event.clientX, clientY: event.clientY }];\n\t\t\tthis.onTouchMove( event );\n\t\t}\n\n\t}\n\n\t/**\n\t * Convert pointer up to touch end.\n\t *\n\t * @param {object} event\n\t */\n\tonPointerUp( event ) {\n\n\t\tif( event.pointerType === event.MSPOINTER_TYPE_TOUCH || event.pointerType === \"touch\" ) {\n\t\t\tevent.touches = [{ clientX: event.clientX, clientY: event.clientY }];\n\t\t\tthis.onTouchEnd( event );\n\t\t}\n\n\t}\n\n}","import { closest } from '../utils/util.js'\n\n/**\n * Manages focus when a presentation is embedded. This\n * helps us only capture keyboard from the presentation\n * a user is currently interacting with in a page where\n * multiple presentations are embedded.\n */\n\nconst STATE_FOCUS = 'focus';\nconst STATE_BLUR = 'blur';\n\nexport default class Focus {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t\tthis.onRevealPointerDown = this.onRevealPointerDown.bind( this );\n\t\tthis.onDocumentPointerDown = this.onDocumentPointerDown.bind( this );\n\n\t}\n\n\t/**\n\t * Called when the reveal.js config is updated.\n\t */\n\tconfigure( config, oldConfig ) {\n\n\t\tif( config.embedded ) {\n\t\t\tthis.blur();\n\t\t}\n\t\telse {\n\t\t\tthis.focus();\n\t\t\tthis.unbind();\n\t\t}\n\n\t}\n\n\tbind() {\n\n\t\tif( this.Reveal.getConfig().embedded ) {\n\t\t\tthis.Reveal.getRevealElement().addEventListener( 'pointerdown', this.onRevealPointerDown, false );\n\t\t}\n\n\t}\n\n\tunbind() {\n\n\t\tthis.Reveal.getRevealElement().removeEventListener( 'pointerdown', this.onRevealPointerDown, false );\n\t\tdocument.removeEventListener( 'pointerdown', this.onDocumentPointerDown, false );\n\n\t}\n\n\tfocus() {\n\n\t\tif( this.state !== STATE_FOCUS ) {\n\t\t\tthis.Reveal.getRevealElement().classList.add( 'focused' );\n\t\t\tdocument.addEventListener( 'pointerdown', this.onDocumentPointerDown, false );\n\t\t}\n\n\t\tthis.state = STATE_FOCUS;\n\n\t}\n\n\tblur() {\n\n\t\tif( this.state !== STATE_BLUR ) {\n\t\t\tthis.Reveal.getRevealElement().classList.remove( 'focused' );\n\t\t\tdocument.removeEventListener( 'pointerdown', this.onDocumentPointerDown, false );\n\t\t}\n\n\t\tthis.state = STATE_BLUR;\n\n\t}\n\n\tisFocused() {\n\n\t\treturn this.state === STATE_FOCUS;\n\n\t}\n\n\tdestroy() {\n\n\t\tthis.Reveal.getRevealElement().classList.remove( 'focused' );\n\n\t}\n\n\tonRevealPointerDown( event ) {\n\n\t\tthis.focus();\n\n\t}\n\n\tonDocumentPointerDown( event ) {\n\n\t\tlet revealElement = closest( event.target, '.reveal' );\n\t\tif( !revealElement || revealElement !== this.Reveal.getRevealElement() ) {\n\t\t\tthis.blur();\n\t\t}\n\n\t}\n\n}","/**\n * Handles the showing and \n */\nexport default class Notes {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t}\n\n\trender() {\n\n\t\tthis.element = document.createElement( 'div' );\n\t\tthis.element.className = 'speaker-notes';\n\t\tthis.element.setAttribute( 'data-prevent-swipe', '' );\n\t\tthis.element.setAttribute( 'tabindex', '0' );\n\t\tthis.Reveal.getRevealElement().appendChild( this.element );\n\n\t}\n\n\t/**\n\t * Called when the reveal.js config is updated.\n\t */\n\tconfigure( config, oldConfig ) {\n\n\t\tif( config.showNotes ) {\n\t\t\tthis.element.setAttribute( 'data-layout', typeof config.showNotes === 'string' ? config.showNotes : 'inline' );\n\t\t}\n\n\t}\n\n\t/**\n\t * Pick up notes from the current slide and display them\n\t * to the viewer.\n\t *\n\t * @see {@link config.showNotes}\n\t */\n\tupdate() {\n\n\t\tif( this.Reveal.getConfig().showNotes && this.element && this.Reveal.getCurrentSlide() && !this.Reveal.print.isPrintingPDF() ) {\n\n\t\t\tthis.element.innerHTML = this.getSlideNotes() || 'No notes on this slide.';\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Updates the visibility of the speaker notes sidebar that\n\t * is used to share annotated slides. The notes sidebar is\n\t * only visible if showNotes is true and there are notes on\n\t * one or more slides in the deck.\n\t */\n\tupdateVisibility() {\n\n\t\tif( this.Reveal.getConfig().showNotes && this.hasNotes() && !this.Reveal.print.isPrintingPDF() ) {\n\t\t\tthis.Reveal.getRevealElement().classList.add( 'show-notes' );\n\t\t}\n\t\telse {\n\t\t\tthis.Reveal.getRevealElement().classList.remove( 'show-notes' );\n\t\t}\n\n\t}\n\n\t/**\n\t * Checks if there are speaker notes for ANY slide in the\n\t * presentation.\n\t */\n\thasNotes() {\n\n\t\treturn this.Reveal.getSlidesElement().querySelectorAll( '[data-notes], aside.notes' ).length > 0;\n\n\t}\n\n\t/**\n\t * Checks if this presentation is running inside of the\n\t * speaker notes window.\n\t *\n\t * @return {boolean}\n\t */\n\tisSpeakerNotesWindow() {\n\n\t\treturn !!window.location.search.match( /receiver/gi );\n\n\t}\n\n\t/**\n\t * Retrieves the speaker notes from a slide. Notes can be\n\t * defined in two ways:\n\t * 1. As a data-notes attribute on the slide
\n\t * 2. As an
+
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'|' + options.verticalSeparator : '' ), 'mg' ), + horizontalSeparatorRegex = new RegExp( options.separator ); + + var matches, + lastIndex = 0, + isHorizontal, + wasHorizontal = true, + content, + sectionStack = []; + + // iterate until all blocks between separators are stacked up + while( matches = separatorRegex.exec( markdown ) ) { + var notes = null; + + // determine direction (horizontal by default) + isHorizontal = horizontalSeparatorRegex.test( matches[0] ); + + if( !isHorizontal && wasHorizontal ) { + // create vertical stack + sectionStack.push( [] ); + } + + // pluck slide content from markdown input + content = markdown.substring( lastIndex, matches.index ); + + if( isHorizontal && wasHorizontal ) { + // add to horizontal stack + sectionStack.push( content ); + } + else { + // add to vertical stack + sectionStack[sectionStack.length-1].push( content ); + } + + lastIndex = separatorRegex.lastIndex; + wasHorizontal = isHorizontal; + } + + // add the remaining slide + ( wasHorizontal ? sectionStack : sectionStack[sectionStack.length-1] ).push( markdown.substring( lastIndex ) ); + + var markdownSections = ''; + + // flatten the hierarchical stack, and insert
tags + for( var i = 0, len = sectionStack.length; i < len; i++ ) { + // vertical + if( sectionStack[i] instanceof Array ) { + markdownSections += '
'; + + sectionStack[i].forEach( function( child ) { + markdownSections += '
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'; + } ); + + markdownSections += '
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'; + } + } + + return markdownSections; + + } + + /** + * Parses any current data-markdown slides, splits + * multi-slide markdown into separate sections and + * handles loading of external markdown. + */ + function processSlides( scope ) { + + return new Promise( function( resolve ) { + + var externalPromises = []; + + [].slice.call( scope.querySelectorAll( 'section[data-markdown]:not([data-markdown-parsed])') ).forEach( function( section, i ) { + + if( section.getAttribute( 'data-markdown' ).length ) { + + externalPromises.push( loadExternalMarkdown( section ).then( + + // Finished loading external file + function( xhr, url ) { + section.outerHTML = slidify( xhr.responseText, { + separator: section.getAttribute( 'data-separator' ), + verticalSeparator: section.getAttribute( 'data-separator-vertical' ), + notesSeparator: section.getAttribute( 'data-separator-notes' ), + attributes: getForwardedAttributes( section ) + }); + }, + + // Failed to load markdown + function( xhr, url ) { + section.outerHTML = '
' + + 'ERROR: The attempt to fetch ' + url + ' failed with HTTP status ' + xhr.status + '.' + + 'Check your browser\'s JavaScript console for more details.' + + '

Remember that you need to serve the presentation HTML from a HTTP server.

' + + '
'; + } + + ) ); + + } + else { + + section.outerHTML = slidify( getMarkdownFromSlide( section ), { + separator: section.getAttribute( 'data-separator' ), + verticalSeparator: section.getAttribute( 'data-separator-vertical' ), + notesSeparator: section.getAttribute( 'data-separator-notes' ), + attributes: getForwardedAttributes( section ) + }); + + } + + }); + + Promise.all( externalPromises ).then( resolve ); + + } ); + + } + + function loadExternalMarkdown( section ) { + + return new Promise( function( resolve, reject ) { + + var xhr = new XMLHttpRequest(), + url = section.getAttribute( 'data-markdown' ); + + var datacharset = section.getAttribute( 'data-charset' ); + + // see https://developer.mozilla.org/en-US/docs/Web/API/element.getAttribute#Notes + if( datacharset != null && datacharset != '' ) { + xhr.overrideMimeType( 'text/html; charset=' + datacharset ); + } + + xhr.onreadystatechange = function( section, xhr ) { + if( xhr.readyState === 4 ) { + // file protocol yields status code 0 (useful for local debug, mobile applications etc.) + if ( ( xhr.status >= 200 && xhr.status < 300 ) || xhr.status === 0 ) { + + resolve( xhr, url ); + + } + else { + + reject( xhr, url ); + + } + } + }.bind( this, section, xhr ); + + xhr.open( 'GET', url, true ); + + try { + xhr.send(); + } + catch ( e ) { + console.warn( 'Failed to get the Markdown file ' + url + '. Make sure that the presentation and the file are served by a HTTP server and the file can be found there. ' + e ); + resolve( xhr, url ); + } + + } ); + + } + + /** + * Check if a node value has the attributes pattern. + * If yes, extract it and add that value as one or several attributes + * to the target element. + * + * You need Cache Killer on Chrome to see the effect on any FOM transformation + * directly on refresh (F5) + * http://stackoverflow.com/questions/5690269/disabling-chrome-cache-for-website-development/7000899#answer-11786277 + */ + function addAttributeInElement( node, elementTarget, separator ) { + + var mardownClassesInElementsRegex = new RegExp( separator, 'mg' ); + var mardownClassRegex = new RegExp( "([^\"= ]+?)=\"([^\"]+?)\"|(data-[^\"= ]+?)(?=[\" ])", 'mg' ); + var nodeValue = node.nodeValue; + var matches, + matchesClass; + if( matches = mardownClassesInElementsRegex.exec( nodeValue ) ) { + + var classes = matches[1]; + nodeValue = nodeValue.substring( 0, matches.index ) + nodeValue.substring( mardownClassesInElementsRegex.lastIndex ); + node.nodeValue = nodeValue; + while( matchesClass = mardownClassRegex.exec( classes ) ) { + if( matchesClass[2] ) { + elementTarget.setAttribute( matchesClass[1], matchesClass[2] ); + } else { + elementTarget.setAttribute( matchesClass[3], "" ); + } + } + return true; + } + return false; + } + + /** + * Add attributes to the parent element of a text node, + * or the element of an attribute node. + */ + function addAttributes( section, element, previousElement, separatorElementAttributes, separatorSectionAttributes ) { + + if ( element != null && element.childNodes != undefined && element.childNodes.length > 0 ) { + var previousParentElement = element; + for( var i = 0; i < element.childNodes.length; i++ ) { + var childElement = element.childNodes[i]; + if ( i > 0 ) { + var j = i - 1; + while ( j >= 0 ) { + var aPreviousChildElement = element.childNodes[j]; + if ( typeof aPreviousChildElement.setAttribute == 'function' && aPreviousChildElement.tagName != "BR" ) { + previousParentElement = aPreviousChildElement; + break; + } + j = j - 1; + } + } + var parentSection = section; + if( childElement.nodeName == "section" ) { + parentSection = childElement ; + previousParentElement = childElement ; + } + if ( typeof childElement.setAttribute == 'function' || childElement.nodeType == Node.COMMENT_NODE ) { + addAttributes( parentSection, childElement, previousParentElement, separatorElementAttributes, separatorSectionAttributes ); + } + } + } + + if ( element.nodeType == Node.COMMENT_NODE ) { + if ( addAttributeInElement( element, previousElement, separatorElementAttributes ) == false ) { + addAttributeInElement( element, section, separatorSectionAttributes ); + } + } + } + + /** + * Converts any current data-markdown slides in the + * DOM to HTML. + */ + function convertSlides() { + + var sections = deck.getRevealElement().querySelectorAll( '[data-markdown]:not([data-markdown-parsed])'); + + [].slice.call( sections ).forEach( function( section ) { + + section.setAttribute( 'data-markdown-parsed', true ) + + var notes = section.querySelector( 'aside.notes' ); + var markdown = getMarkdownFromSlide( section ); + + section.innerHTML = marked( markdown ); + addAttributes( section, section, null, section.getAttribute( 'data-element-attributes' ) || + section.parentNode.getAttribute( 'data-element-attributes' ) || + DEFAULT_ELEMENT_ATTRIBUTES_SEPARATOR, + section.getAttribute( 'data-attributes' ) || + section.parentNode.getAttribute( 'data-attributes' ) || + DEFAULT_SLIDE_ATTRIBUTES_SEPARATOR); + + // If there were notes, we need to re-add them after + // having overwritten the section's HTML + if( notes ) { + section.appendChild( notes ); + } + + } ); + + return Promise.resolve(); + + } + + function escapeForHTML( input ) { + + return input.replace( /([&<>'"])/g, char => HTML_ESCAPE_MAP[char] ); + + } + + return { + id: 'markdown', + + /** + * Starts processing and converting Markdown within the + * current reveal.js deck. + */ + init: function( reveal ) { + + deck = reveal; + + let { renderer, animateLists, ...markedOptions } = deck.getConfig().markdown || {}; + + if( !renderer ) { + renderer = new marked.Renderer(); + + renderer.code = ( code, language ) => { + + // Off by default + let lineNumbers = ''; + + // Users can opt in to show line numbers and highlight + // specific lines. + // ```javascript [] show line numbers + // ```javascript [1,4-8] highlights lines 1 and 4-8 + if( CODE_LINE_NUMBER_REGEX.test( language ) ) { + lineNumbers = language.match( CODE_LINE_NUMBER_REGEX )[1].trim(); + lineNumbers = `data-line-numbers="${lineNumbers}"`; + language = language.replace( CODE_LINE_NUMBER_REGEX, '' ).trim(); + } + + // Escape before this gets injected into the DOM to + // avoid having the HTML parser alter our code before + // highlight.js is able to read it + code = escapeForHTML( code ); + + return `
${code}
`; + }; + } + + if( animateLists === true ) { + renderer.listitem = text => `
  • ${text}
    • `; + } + + marked.setOptions( { + renderer, + ...markedOptions + } ); + + return processSlides( deck.getRevealElement() ).then( convertSlides ); + + }, + + // TODO: Do these belong in the API? + processSlides: processSlides, + convertSlides: convertSlides, + slidify: slidify, + marked: marked + } + +}; + +export default Plugin; diff --git a/plugin/math/katex.js b/plugin/math/katex.js new file mode 100755 index 0000000..a8b47c4 --- /dev/null +++ b/plugin/math/katex.js @@ -0,0 +1,96 @@ +/** + * A plugin which enables rendering of math equations inside + * of reveal.js slides. Essentially a thin wrapper for KaTeX. + * + * @author Hakim El Hattab + * @author Gerhard Burger + */ +export const KaTeX = () => { + let deck; + + let defaultOptions = { + version: 'latest', + delimiters: [ + {left: '$$', right: '$$', display: true}, // Note: $$ has to come before $ + {left: '$', right: '$', display: false}, + {left: '\\(', right: '\\)', display: false}, + {left: '\\[', right: '\\]', display: true} + ], + ignoredTags: ['script', 'noscript', 'style', 'textarea', 'pre'] + } + + const loadCss = src => { + let link = document.createElement('link'); + link.rel = 'stylesheet'; + link.href = src; + document.head.appendChild(link); + }; + + /** + * Loads a JavaScript file and returns a Promise for when it is loaded + * Credits: https://aaronsmith.online/easily-load-an-external-script-using-javascript/ + */ + const loadScript = src => { + return new Promise((resolve, reject) => { + const script = document.createElement('script') + script.type = 'text/javascript' + script.onload = resolve + script.onerror = reject + script.src = src + document.head.append(script) + }) + }; + + async function loadScripts(urls) { + for(const url of urls) { + await loadScript(url); + } + } + + return { + id: 'katex', + + init: function (reveal) { + + deck = reveal; + + let revealOptions = deck.getConfig().katex || {}; + + let options = {...defaultOptions, ...revealOptions}; + const {local, version, extensions, ...katexOptions} = options; + + let baseUrl = options.local || 'https://cdn.jsdelivr.net/npm/katex'; + let versionString = options.local ? '' : '@' + options.version; + + let cssUrl = baseUrl + versionString + '/dist/katex.min.css'; + let katexUrl = baseUrl + versionString + '/dist/katex.min.js'; + let mhchemUrl = baseUrl + versionString + '/dist/contrib/mhchem.min.js' + let karUrl = baseUrl + versionString + '/dist/contrib/auto-render.min.js'; + + let katexScripts = [katexUrl]; + if(options.extensions && options.extensions.includes("mhchem")) { + katexScripts.push(mhchemUrl); + } + katexScripts.push(karUrl); + + const renderMath = () => { + renderMathInElement(reveal.getSlidesElement(), katexOptions); + deck.layout(); + } + + loadCss(cssUrl); + + // For some reason dynamically loading with defer attribute doesn't result in the expected behavior, the below code does + loadScripts(katexScripts).then(() => { + if( deck.isReady() ) { + renderMath(); + } + else { + deck.on( 'ready', renderMath.bind( this ) ); + } + }); + + } + } + +}; diff --git a/plugin/math/math.esm.js b/plugin/math/math.esm.js new file mode 100644 index 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currentMatchedIndex; + let searchboxDirty; + let hilitor; + + function render() { + + searchElement = document.createElement( 'div' ); + searchElement.classList.add( 'searchbox' ); + searchElement.style.position = 'absolute'; + searchElement.style.top = '10px'; + searchElement.style.right = '10px'; + searchElement.style.zIndex = 10; + + //embedded base64 search icon Designed by Sketchdock - http://www.sketchdock.com/: + searchElement.innerHTML = ` + `; + + searchInput = searchElement.querySelector( '.searchinput' ); + searchInput.style.width = '240px'; + searchInput.style.fontSize = '14px'; + searchInput.style.padding = '4px 6px'; + searchInput.style.color = '#000'; + searchInput.style.background = '#fff'; + searchInput.style.borderRadius = '2px'; + searchInput.style.border = '0'; + searchInput.style.outline = '0'; + searchInput.style.boxShadow = '0 2px 18px rgba(0, 0, 0, 0.2)'; + searchInput.style['-webkit-appearance'] = 'none'; + + deck.getRevealElement().appendChild( searchElement ); + + // searchButton.addEventListener( 'click', function(event) { + // doSearch(); + // }, false ); + + searchInput.addEventListener( 'keyup', function( event ) { + switch (event.keyCode) { + case 13: + event.preventDefault(); + doSearch(); + searchboxDirty = false; + break; + default: + searchboxDirty = true; + } + }, false ); + + closeSearch(); + + } + + function openSearch() { + if( !searchElement ) render(); + + searchElement.style.display = 'inline'; + searchInput.focus(); + searchInput.select(); + } + + function closeSearch() { + if( !searchElement ) render(); + + searchElement.style.display = 'none'; + if(hilitor) hilitor.remove(); + } + + function toggleSearch() { + if( !searchElement ) render(); + + if (searchElement.style.display !== 'inline') { + openSearch(); + } + else { + closeSearch(); + } + } + + function doSearch() { + //if there's been a change in the search term, perform a new search: + if (searchboxDirty) { + var searchstring = searchInput.value; + + if (searchstring === '') { + if(hilitor) hilitor.remove(); + matchedSlides = null; + } + else { + //find the keyword amongst the slides + hilitor = new Hilitor("slidecontent"); + matchedSlides = hilitor.apply(searchstring); + currentMatchedIndex = 0; + } + } + + if (matchedSlides) { + //navigate to the next slide that has the keyword, wrapping to the first if necessary + if (matchedSlides.length && (matchedSlides.length <= currentMatchedIndex)) { + currentMatchedIndex = 0; + } + if (matchedSlides.length > currentMatchedIndex) { + deck.slide(matchedSlides[currentMatchedIndex].h, matchedSlides[currentMatchedIndex].v); + currentMatchedIndex++; + } + } + } + + // Original JavaScript code by Chirp Internet: www.chirp.com.au + // Please acknowledge use of this code by including this header. + // 2/2013 jon: modified regex to display any match, not restricted to word boundaries. + function Hilitor(id, tag) { + + var targetNode = document.getElementById(id) || document.body; + var hiliteTag = tag || "EM"; + var skipTags = new RegExp("^(?:" + hiliteTag + "|SCRIPT|FORM)$"); + var colors = ["#ff6", "#a0ffff", "#9f9", "#f99", "#f6f"]; + var wordColor = []; + var colorIdx = 0; + var matchRegex = ""; + var matchingSlides = []; + + this.setRegex = function(input) + { + input = input.replace(/^[^\w]+|[^\w]+$/g, "").replace(/[^\w'-]+/g, "|"); + matchRegex = new RegExp("(" + input + ")","i"); + } + + this.getRegex = function() + { + return matchRegex.toString().replace(/^\/\\b\(|\)\\b\/i$/g, "").replace(/\|/g, " "); + } + + // recursively apply word highlighting + this.hiliteWords = function(node) + { + if(node == undefined || !node) return; + if(!matchRegex) return; + if(skipTags.test(node.nodeName)) return; + + if(node.hasChildNodes()) { + for(var i=0; i < node.childNodes.length; i++) + this.hiliteWords(node.childNodes[i]); + } + if(node.nodeType == 3) { // NODE_TEXT + var nv, regs; + if((nv = node.nodeValue) && (regs = matchRegex.exec(nv))) { + //find the slide's section element and save it in our list of matching slides + var secnode = node; + while (secnode != null && secnode.nodeName != 'SECTION') { + secnode = secnode.parentNode; + } + + var slideIndex = deck.getIndices(secnode); + var slidelen = matchingSlides.length; + var alreadyAdded = false; + for (var i=0; i < slidelen; i++) { + if ( (matchingSlides[i].h === slideIndex.h) && (matchingSlides[i].v === slideIndex.v) ) { + alreadyAdded = true; + } + } + if (! alreadyAdded) { + matchingSlides.push(slideIndex); + } + + if(!wordColor[regs[0].toLowerCase()]) { + wordColor[regs[0].toLowerCase()] = colors[colorIdx++ % colors.length]; + } + + var match = document.createElement(hiliteTag); + match.appendChild(document.createTextNode(regs[0])); + match.style.backgroundColor = wordColor[regs[0].toLowerCase()]; + match.style.fontStyle = "inherit"; + match.style.color = "#000"; + + var after = node.splitText(regs.index); + after.nodeValue = after.nodeValue.substring(regs[0].length); + node.parentNode.insertBefore(match, after); + } + } + }; + + // remove highlighting + this.remove = function() + { + var arr = document.getElementsByTagName(hiliteTag); + var el; + while(arr.length && (el = arr[0])) { + el.parentNode.replaceChild(el.firstChild, el); + } + }; + + // start highlighting at target node + this.apply = function(input) + { + if(input == undefined || !input) return; + this.remove(); + this.setRegex(input); + this.hiliteWords(targetNode); + return matchingSlides; + }; + + } + + return { + + id: 'search', + + init: reveal => { + + deck = reveal; + deck.registerKeyboardShortcut( 'CTRL + Shift + F', 'Search' ); + + document.addEventListener( 'keydown', function( event ) { + if( event.key == "F" && (event.ctrlKey || event.metaKey) ) { //Control+Shift+f + event.preventDefault(); + toggleSearch(); + } + }, false ); + + }, + + open: openSearch + + } +}; + +export default Plugin; \ No newline at end of file diff --git a/plugin/search/search.esm.js b/plugin/search/search.esm.js new file mode 100644 index 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support so that we can fallback otherwise + var supportsTransforms = 'transform' in document.body.style; + + if( supportsTransforms ) { + // The easing that will be applied when we zoom in/out + document.body.style.transition = 'transform 0.8s ease'; + } + + // Zoom out if the user hits escape + document.addEventListener( 'keyup', function( event ) { + if( level !== 1 && event.keyCode === 27 ) { + zoom.out(); + } + } ); + + // Monitor mouse movement for panning + document.addEventListener( 'mousemove', function( event ) { + if( level !== 1 ) { + mouseX = event.clientX; + mouseY = event.clientY; + } + } ); + + /** + * Applies the CSS required to zoom in, prefers the use of CSS3 + * transforms but falls back on zoom for IE. + * + * @param {Object} rect + * @param {Number} scale + */ + function magnify( rect, scale ) { + + var scrollOffset = getScrollOffset(); + + // Ensure a width/height is set + rect.width = rect.width || 1; + rect.height = rect.height || 1; + + // Center the rect within the zoomed viewport + rect.x -= ( window.innerWidth - ( rect.width * scale ) ) / 2; + rect.y -= ( window.innerHeight - ( rect.height * scale ) ) / 2; + + if( supportsTransforms ) { + // Reset + if( scale === 1 ) { + document.body.style.transform = ''; + } + // Scale + else { + var origin = scrollOffset.x +'px '+ scrollOffset.y +'px', + transform = 'translate('+ -rect.x +'px,'+ -rect.y +'px) scale('+ scale +')'; + + document.body.style.transformOrigin = origin; + document.body.style.transform = transform; + } + } + else { + // Reset + if( scale === 1 ) { + document.body.style.position = ''; + document.body.style.left = ''; + document.body.style.top = ''; + document.body.style.width = ''; + document.body.style.height = ''; + document.body.style.zoom = ''; + } + // Scale + else { + document.body.style.position = 'relative'; + document.body.style.left = ( - ( scrollOffset.x + rect.x ) / scale ) + 'px'; + document.body.style.top = ( - ( scrollOffset.y + rect.y ) / scale ) + 'px'; + document.body.style.width = ( scale * 100 ) + '%'; + document.body.style.height = ( scale * 100 ) + '%'; + document.body.style.zoom = scale; + } + } + + level = scale; + + if( document.documentElement.classList ) { + if( level !== 1 ) { + document.documentElement.classList.add( 'zoomed' ); + } + else { + document.documentElement.classList.remove( 'zoomed' ); + } + } + } + + /** + * Pan the document when the mosue cursor approaches the edges + * of the window. + */ + function pan() { + var range = 0.12, + rangeX = window.innerWidth * range, + rangeY = window.innerHeight * range, + scrollOffset = getScrollOffset(); + + // Up + if( mouseY < rangeY ) { + window.scroll( scrollOffset.x, scrollOffset.y - ( 1 - ( mouseY / rangeY ) ) * ( 14 / level ) ); + } + // Down + else if( mouseY > window.innerHeight - rangeY ) { + window.scroll( scrollOffset.x, scrollOffset.y + ( 1 - ( window.innerHeight - mouseY ) / rangeY ) * ( 14 / level ) ); + } + + // Left + if( mouseX < rangeX ) { + window.scroll( scrollOffset.x - ( 1 - ( mouseX / rangeX ) ) * ( 14 / level ), scrollOffset.y ); + } + // Right + else if( mouseX > window.innerWidth - rangeX ) { + window.scroll( scrollOffset.x + ( 1 - ( window.innerWidth - mouseX ) / rangeX ) * ( 14 / level ), scrollOffset.y ); + } + } + + function getScrollOffset() { + return { + x: window.scrollX !== undefined ? window.scrollX : window.pageXOffset, + y: window.scrollY !== undefined ? window.scrollY : window.pageYOffset + } + } + + return { + /** + * Zooms in on either a rectangle or HTML element. + * + * @param {Object} options + * - element: HTML element to zoom in on + * OR + * - x/y: coordinates in non-transformed space to zoom in on + * - width/height: the portion of the screen to zoom in on + * - scale: can be used instead of width/height to explicitly set scale + */ + to: function( options ) { + + // Due to an implementation limitation we can't zoom in + // to another element without zooming out first + if( level !== 1 ) { + zoom.out(); + } + else { + options.x = options.x || 0; + options.y = options.y || 0; + + // If an element is set, that takes precedence + if( !!options.element ) { + // Space around the zoomed in element to leave on screen + var padding = 20; + var bounds = options.element.getBoundingClientRect(); + + options.x = bounds.left - padding; + options.y = bounds.top - padding; + options.width = bounds.width + ( padding * 2 ); + options.height = bounds.height + ( padding * 2 ); + } + + // If width/height values are set, calculate scale from those values + if( options.width !== undefined && options.height !== undefined ) { + options.scale = Math.max( Math.min( window.innerWidth / options.width, window.innerHeight / options.height ), 1 ); + } + + if( options.scale > 1 ) { + options.x *= options.scale; + options.y *= options.scale; + + magnify( options, options.scale ); + + if( options.pan !== false ) { + + // Wait with engaging panning as it may conflict with the + // zoom transition + panEngageTimeout = setTimeout( function() { + panUpdateInterval = setInterval( pan, 1000 / 60 ); + }, 800 ); + + } + } + } + }, + + /** + * Resets the document zoom state to its default. + */ + out: function() { + clearTimeout( panEngageTimeout ); + clearInterval( panUpdateInterval ); + + magnify( { x: 0, y: 0 }, 1 ); + + level = 1; + }, + + // Alias + magnify: function( options ) { this.to( options ) }, + reset: function() { this.out() }, + + zoomLevel: function() { + return level; + } + } + +})(); diff --git a/plugin/zoom/zoom.esm.js b/plugin/zoom/zoom.esm.js new file mode 100644 index 0000000..c0e8d7b --- /dev/null +++ b/plugin/zoom/zoom.esm.js @@ -0,0 +1,4 @@ +/*! + * reveal.js Zoom plugin + */ +var e={id:"zoom",init:function(e){e.getRevealElement().addEventListener("mousedown",(function(n){var 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b/portada-videos/generate-video-front-panel.sh deleted file mode 100755 index 6246bcf..0000000 --- a/portada-videos/generate-video-front-panel.sh +++ /dev/null @@ -1,11 +0,0 @@ -#!/bin/bash -set -eo pipefail - -OUT=/tmp/out.mp4 -NUM=${1:?Debe indicar la clase como numero} -FILE=/tmp/video-cover-processed.svg -PNGFILE=/tmp/video-cover-processed.png -sed "s/Categoría del contenido/Teoría/;s/Título del video/Clase $NUM/" video-cover.svg > $FILE -inkscape -z -w 1920 -h 1080 $FILE -o $PNGFILE -echo Generated $FILE and $PNGFILE - diff --git a/portada-videos/video-cover.svg b/portada-videos/video-cover.svg deleted file mode 100644 index add1d4f..0000000 --- a/portada-videos/video-cover.svg +++ /dev/null @@ -1,202 +0,0 @@ - - - - - - - - - - - - - - - - - image/svg+xml - - - - - - - - - - - Taller de Tecnologías de Producción de Software - Opción Ruby - Facultad de Informática - Universidad Nacional de La Plata - - - Categoría del contenido - Título del video - - diff --git a/preproc.js b/preproc.js deleted file mode 100644 index 65d5be3..0000000 --- a/preproc.js +++ /dev/null @@ -1,54 +0,0 @@ -const { readFileSync } = require('fs') -const path = require('path') - -const LINE_SEPARATOR = '\n' -const FILE_REF_REGEX = /^FILE: (.+)$/ -const CODE_FILE_REF_REGEX = /^CODE: (\S+) (\S+)\s*(\d\S+|editable)?\s*(class=(.*))?$/ - -const escapeHtml = unsafe => - unsafe - .replace(/&/g, "&") - .replace(//g, ">") - .replace(/"/g, """) - .replace(/'/g, "'") - -const codeTemplate = (code, lang = 'javascript', { editable, dataLineNumbers, cssClass }) => ( -`
    -  ${escapeHtml(code)}
-
    `) - -const isFileReference = line => FILE_REF_REGEX.test(line) -const isCodeFileReference = line => CODE_FILE_REF_REGEX.test(line) -const loadFileContent = (line, basePath) => { - const filePath = line.match(FILE_REF_REGEX)[1] - - return preprocess(readFileSync(path.join(basePath, filePath), 'utf8')) -} - -const loadCodeFileContent = (line, basePath) => { - const filePath = line.match(CODE_FILE_REF_REGEX)[1] - const lang = line.match(CODE_FILE_REF_REGEX)[2] - const prop = line.match(CODE_FILE_REF_REGEX)[3] - const cssClass = line.match(CODE_FILE_REF_REGEX)[4] - const props = { - editable: prop === 'editable', - dataLineNumbers: prop !== 'editable' ? prop : undefined, - cssClass: cssClass ? line.match(CODE_FILE_REF_REGEX)[5]:'' - } - const code = readFileSync(path.join(basePath, filePath), 'utf8') - - return codeTemplate(code, lang, props) -} - -const preprocess = (markdown) => - markdown - .split(LINE_SEPARATOR) - .map(line => { - if (isFileReference(line)) return loadFileContent(line, 'src/sections') - else if (isCodeFileReference(line)) return loadCodeFileContent(line, 'src/examples') - return line - }) - .join(LINE_SEPARATOR) - -module.exports = preprocess diff --git a/src/sections/12-factors.md b/src/sections/12-factors.md deleted file mode 100644 index ad50099..0000000 --- a/src/sections/12-factors.md +++ /dev/null @@ -1,222 +0,0 @@ - -# The Twelve-Factor App - - ----- - -## The Twelve-Factor App - -
    -
    - -* ¿Qué es? -* I - Código fuente -* II - Dependencias -* III - Configuración -* IV - Servicios -* V - Construir, distribuir, ejecutar - -
    - -
      - -* VI - Procesos -* VII - Asignación de puertos -* VIII - Concurrencia -* IX - Desechabilidad -* X - Aproximación entre desarrollo y producción -* XI - Logs -* XII - Procesos de administración - -
    -
    - ----- - -## ¿Qué es? - -Esta metodología se enuncia en https://12factor.net y describe un conjunto de -prácticas para construir aplicaciones web o SaaS. - ----- - -## I - Código fuente - -* La aplicación debe usar un SCM _-Source Control Management-_ como por ejemplo git. -* Si hay múltiples repositorios de fuentes, es porque se trata de un sistema distribuido y no una aplicación. En tal caso, cada aplicación puede aplicar 12 factor. -* Pueden existir mútiples despliegues. - * _Depende de los ambientes_. - * Los fuentes son los mismos en todos los despliegues, salvo por diferencias de versiones. - ----- - -## II - Dependencias - -* Declarar y aislar dependencias de forma explícita. - * _Usando Gemfile, Pipfile, package.json (Yarn, npm), composer.json, Gopkg.toml, pom.xml_. -* Las librerías descargadas por el manejador de dependencias deben poder instalarse en el sistema o bajo un directorio del proyecto (vendor). -* A veces estas dependencias pueden requerir la instalación de librerías o comandos en el sistema base. - ----- - -### III - Configuración - -* La configuración de una aplicación es lo único que puede variar entre despliegues de una misma versión en diferentes ambientes: - * Bases de datos, cachés u otros servicios. - * Credenciales para servicios externos tales como Amazon S3, APIs, etc. - * Valores propios del despliegue. -* Guardar constantes de configuración en el código **viola 12 factor**. - * _La configuración varía entre despliegues, no el código_. -* Se propone utilizar **variables de entorno**. - ----- - -## IV - Servicios - -* Tratar los servicios como recursos conectables: - * Bases de datos (no)SQL. - * SMTP. - * Colas como ZeroMQ, RabbitMQ, ActiveMQ. -* Deben poder configurarse mediante URLs o variables de entorno. -* Ser fácilmente reemplazables. - ----- - -### V - Construir, distribuir, ejecutar - -
    - -* Separar siempre la etapa de construcción de ejecución. -* Los fuentes se transforman en un despliegue al completarse las etapas de: - * **Construcción:** compilación del código en binarios ejecutables o intermedios. - * _No aplica a lenguajes interpretados. **Sí para docker**_. - * **Distribución:** preparado de un paquete listo para ser desplegado. - * **Ejecución:** etapa que se instancia luego del despliegue en un ambiente. - -> Hay relación entre entrega continua (construcción y distribución) y despliegue -> continuo (ejecución). - -
    - ----- - -### V - Construir, distribuir, ejecutar -* Las herramientas de despliegue como por ejemplo [caspitrano](https://capistranorb.com/), realizan la distribución en directorios diferentes que son referenciados con links simbólicos. -* La fase de ejecución controla los procesos de la aplicación que permiten su - funcionamiento. - * Generalmente se delega en algún manejador de procesos como systemd, upstart, init-scripts, supervisord, etc. - ----- - -## VI - Procesos - -* Ejecutar la aplicación como uno o más procesos sin estado. -* Los procesos que componen una aplicación 12 factor **no tienen estado y no - comparten nada**. - * Cualquier información que deba persistirse debe utilizar algún servicio que - permite almacenar el estado (por ejemplo bases de datos, NFS, S3). - ----- - -## VI - Procesos - -* Los compresores de assets, se recomiendan que se apliquen en la **fase de - construcción** en vez del momento de ejecución. - * Esto responde algunas cuestiones acerca de cómo armar un `Dockerfile`. -* El uso de sticky sessions asumen que alguna aplicación guarda datos que no - son sin estado, por ejemplo en memoria. **Esto viola 12 factor app**. - * Tratar de usar caches como Memcached o Redis. - * O usar cookies firmadas como session store. _Ver explicación en la - [documentación de Ruby on Rails](https://api.rubyonrails.org/v6.0.3.3/classes/ActionDispatch/Session/CookieStore.html)_. - ----- - -## VII - Asignación de puertos - -* Publicar servicios usando puertos diferentes. -* Las aplicaciones 12 factor son autocontenidas, esto es, no dependen de un web - server o application server en ejecución para crear un servicio web público. - * Analogía con docker. - ----- - -## VIII - Concurrencia - -* Escalar mediante el modelo de procesos. -* Según el lenguaje, el modelo de procesos varía: - * PHP, Ruby y ¿Python? utiliza preforks (no threads). Los últimos por GIL. - * Go y Java explotan el uso de threads. - ----- - -## VIII - Concurrencia - -* Los modelos de procesos muestran su potencial a la hora de escalar. -* Al ser cualquier 12 factor app una aplicación que no comparte nada, sin - estado, el escalamiento horizontal es simple y confiable. -* Los procesos nunca deberían ser daemons. Deben correr en foreground. - * Ver este post acerca de no usar daemons llamado: _[Don't daemonize your - daemons!](https://www.mikeperham.com/2014/09/22/dont-daemonize-your-daemons/)_. - ----- - -## VIII - Concurrencia - -Cuando una aplicación debe atender procesos lentos, es aconsejable utilizar -threads. Cuando esto no es posible, se aconseja utilizar procesos fuera de -banda como es el caso de: - -* [EventMachine](https://github.com/eventmachine/eventmachine) / [Sidekiq](https://sidekiq.org/) -* [Twisted](https://twistedmatrix.com/trac/) / - [Celery](https://docs.celeryproject.org) -* [NodeJS](https://nodejs.org/en/) -* [Vertx](https://vertx.io/) - ----- - -## IX - Desechabilidad - -* Si los sistemas inician rápido y su muerte (kill) es segura, el sistema se vuelve robusto. -* Los procesos de una aplicación 12 factor debe ser desechables. - ----- - -### X - Aproximación entre dev y ops - -* Mantener todos los ambientes lo más similares que sea posible entre ambientes. -* Evitar las diferencias de ambientes considerando: - * **Diferencias de tiempo:** evitar que el desarrollo de un feature no se suba al repositorio de fuentes en períodos largos de tiempo. - * **Diferencias de personal:** el despliegue lo hacen operadores y lo desarrollan programadores. Unificar roles. - * **Diferencias de herramientas:** producción usa Postgres y desarrollo SQLite. - ----- - -### X - Aproximación entre dev y ops - -Las aplicaciones 12 factor deben estar preparadas para realizar despliegues -continuo. - -Hoy es muy común utilizar diferentes servicios como parte de un desarrollo. El -armado del ambiente para desarrollo se simplifica utilizando herramientas como -**docker**, **docker-compose** o **vagrant**. - ----- - -## XI - Logs - -Una aplicación 12 factor nunca se preocupa del direccionamiento, almacenamiento -o rotación de logs. - -En general debe escribir los logs en **stdout** y **stderr**. - ----- - -### XII - Procesos de administración - -* Hace mención a tareas de gestión de la aplicación: - * Correr migraciones de la base de datos _-schema migrations-_. - * Aplicar algún parche. - * Iniciar una consola REPL. -* Estas tareas deben ejecutarse en un entorno similar al que ejecuta la - aplicación habitualmente. - diff --git a/src/sections/active-record.md b/src/sections/active-record.md deleted file mode 100644 index 819e5b3..0000000 --- a/src/sections/active-record.md +++ /dev/null @@ -1,33 +0,0 @@ -# Active Record - -
    - -* introducción -* crud -* migraciones -* validaciones -* asociaciones -
    ---- - -FILE: active-record/introduccion.md - ---- - -FILE: active-record/crud.md - ---- - -FILE: active-record/migraciones.md - ---- - -FILE: active-record/validaciones.md - ---- - -FILE: active-record/asociaciones.md - ---- - -FILE: active-record/referencias.md diff --git a/src/sections/active-record/asociaciones.md b/src/sections/active-record/asociaciones.md deleted file mode 100644 index 1b2a31e..0000000 --- a/src/sections/active-record/asociaciones.md +++ /dev/null @@ -1,489 +0,0 @@ -# asociaciones - -
    - -* active record - -
    - ----- - -## Introducción - -Las asociaciones simplifican la interacción entre modelos relacionados - -```ruby -class Customer < ActiveRecord::Base -end - -class Order < ActiveRecord::Base -end -``` - -> ¿Cómo podemos representar la relación entre clientes que tienen varias ordenes? - ----- - -## Introducción - -
    - -Si los clientes pueden tener varias órdenes la forma de relacionarlos sin -utilizar asociaciones sería: - -```ruby -@order = Order.create order_date: Time.now, - customer_id: @customer.id - -# Para eliminar un cliente con sus ordenes: -@orders = Order.where customer_id: @customer.id - -@orders.each do |order| - order.destroy -end - -@customer.destroy -``` -
    ----- -## La solución - -```ruby -class Customer < ActiveRecord::Base - has_many :orders, dependent: :destroy -end - -class Order < ActiveRecord::Base - belongs_to :customer -end - -# Crear una orden: -@order = @customer.orders.create order_date: Time.now - -# Eliminar un cliente: -@customer.destroy -``` ----- -## Tipos de asociaciones - -* Las asociaciones podrán ser alguna de: - * **`belongs_to`** - * **`has_one`** - * **`has_many`** - * **`has_many :through`** - * **`has_one :through`** - * **`has_and_belongs_to_many`** - ----- - - -## belongs_to - -
    - -* Arma una relación **uno a uno** con otro modelo. -* En general se usa combinado con una asociación **`has_many`** o **`has_one`** desde - el otro modelo. - -
    - - - - -> Clientes con múltiples órdenes, donde cada orden es de un cliente. - ----- - -## belongs_to - -Es importante destacar que estas asociaciones deben usar términos -en singular. - -En el ejemplo anterior si se hubiese utilizado **`cutomers`** en la asociación, -entonces surgiría un error indicando que `Order::Customers` es desconocido. - -> Esto se debe a que rails infiere el nombre de la clase a partir del nombre -> de la asociación. - ----- - -## belongs_to - -```ruby -class CreateOrders < ActiveRecord::Migration - def change - create_table :customers do |t| - t.string :name - t.timestamps null: false - end - - create_table :orders do |t| - t.belongs_to :customer, index: true - t.datetime :order_date - t.timestamps null: false - end - end -end -``` ----- -## has_one - -
    - -* Arma una relación **uno a uno** con otro modelo pero con una semántica - diferente a la de `belongs_to`. -* Esta asociación se utiliza para denotar relaciones uno a uno únicamente. -
    - - - -> Proveedores con una cuenta. - ----- -## has_one - -```ruby -class CreateSuppliers < ActiveRecord::Migration - def change - create_table :suppliers do |t| - t.string :name - t.timestamps null: false - end - - create_table :accounts do |t| - t.belongs_to :supplier, index: :unique - t.string :account_number - t.timestamps null: false - end - end -end -``` - -> `has_one` se coloca en la clase opuesta donde existe la clave foránea. Es -> similar a la asociación `has_many` pero en relaciones uno a uno en vez de uno -> a muchos. - ----- -## has_many - -
    - -* Arma una relación **uno a muchos** con otro modelo: este modelo puede tener - cero o más instancias del modelo mencionado. -* Generalmente se encontrará en *el otro lado* de una asociación `belongs_to`. -
    - - - ----- -## has_many - -```ruby -class CreateOrders < ActiveRecord::Migration - def change - create_table :customers do |t| - t.string :name - t.timestamps null: false - end - - create_table :orders do |t| - t.belongs_to :customer, index: true - t.datetime :order_date - t.timestamps null: false - end - end -end -``` - -> Es similar a la migración del ejemplo del `belongs_to` - ----- - -## has_many :through - -* Generalmente usada en relaciones **muchos a muchos** con otro modelo. -* Esta asociación indica que el modelo que la declara puede disponer de cero o - más instancias del otro modelo, a través de un tercer modelo. - ----- - -## has_many :through - - - - -> Turnos solicitados por pacientes para ser atendidos por médicos - ----- - -## has_many :through - -
    - -
    - -Clases del modelo - -```ruby -class Physician < ActiveRecord::Base - has_many :appointments - has_many :patients, through: :appointments -end - -class Appointment < ActiveRecord::Base - belongs_to :physician - belongs_to :patient -end - -class Patient < ActiveRecord::Base - has_many :appointments - has_many :physicians, through: :appointments -end -``` - -
    -
    - -Migraciones - -```ruby -class CreateAppointments < ActiveRecord::Migration - def change - create_table :physicians do |t| - t.string :name - t.timestamps null: false - end - - create_table :patients do |t| - t.string :name - t.timestamps null: false - end - - create_table :appointments do |t| - t.belongs_to :physician, index: true - t.belongs_to :patient, index: true - t.datetime :appointment_date - t.timestamps null: false - end - end -end -``` -
    - ----- -## has_one :through -* Generalmente usada en relaciones **uno a uno** con otro modelo. -* Esta asociación indica que el modelo que la declara puede disponer de una - instancia de otro modelo accesible a través de un tercer modelo. - ----- - -## has_one :through - - - -> Un proveedor tiene una cuenta y cada cuenta tiene asociado un histórico de -> cuenta - ----- - -## has_one :through - -
    - - -
    - -Clases del modelo - -```ruby -class Supplier < ActiveRecord::Base - has_one :account - has_one :account_history, through: :account -end - -class Account < ActiveRecord::Base - belongs_to :supplier - has_one :account_history -end - -class AccountHistory < ActiveRecord::Base - belongs_to :account -end -``` - -
    -
    - -Migraciones - -```ruby -class CreateAccountHistories < ActiveRecord::Migration - def change - create_table :suppliers do |t| - t.string :name - t.timestamps null: false - end - - create_table :accounts do |t:| - t.belongs_to :supplier, index: :unique - t.string :account_number - t.timestamps null: false - end - - create_table :account_histories do |t| - t.belongs_to :account, index: :unique - t.integer :credit_rating - t.timestamps null: false - end - end -end -``` - -
    -
    - - ----- -## has_and_belongs_to_many - -Crea una relación directa **muchos a muchos** con otro modelo sin un modelo -interviniente. - ----- - -## has_and_belongs_to_many - - - -> Montaje de muchas piezas que puedan aparecer en muchos montajes - ----- - -## has_and_belongs_to_many - -
    - -```ruby -class CreateAssembliesAndParts < ActiveRecord::Migration - def change - create_table :assemblies do |t| - t.string :name - t.timestamps null: false - end - - create_table :parts do |t| - t.string :part_number - t.timestamps null: false - end - - create_table :assemblies_parts, id: false do |t| - t.belongs_to :assembly, index: true - t.belongs_to :part, index: true - end - end -end -``` -
    - ----- -## Asociaciones polimórficas - -Un modelo puede pertenecer a uno o más modelos en una misma asociación - - -```ruby -class Picture < ActiveRecord::Base - belongs_to :imageable, polymorphic: true -end - -class Employee < ActiveRecord::Base - has_many :pictures, as: :imageable -end - -class Product < ActiveRecord::Base - has_many :pictures, as: :imageable -end -``` -> Una imagen puede pertenecer a un empleado o un producto** - ----- - -## Asociaciones polimórficas - -* Desde una instancia de empleado es posible obtener las imágenes usando - **`@employee.pictures`**. -* De igual forma es posible **`@product.pictures`**. -* También es posible **`@picture.imageable`**. En este caso retornará instancias - de **`Product`** o **`Employee`**. - ----- - -## Asociaciones polimórficas - -
    -
    - -```ruby - - -class CreatePictures < ActiveRecord::Migration - def change - create_table :pictures do |t| - t.string :name - t.integer :imageable_id - t.string :imageable_type - t.timestamps null: false - end - - add_index :pictures, :imageable_id - end -end -``` -
    -
    - -```ruby - - -class CreatePictures < ActiveRecord::Migration - def change - create_table :pictures do |t| - t.string :name - t.references :imageable, polymorphic: true, - index: true - t.timestamps null: false - end - end -end -``` -> Migración conveniente -
    -
    - ----- - -## Asociaciones conmigo mismo - -```ruby -class Employee < ActiveRecord::Base - has_many :subordinates, class_name: "Employee", - foreign_key: "manager_id" - - belongs_to :manager, class_name: "Employee" -end -``` ----- -## Asociaciones conmigo mismo - -```ruby -class CreateEmployees < ActiveRecord::Migration - def change - create_table :employees do |t| - t.references :manager, index: true - t.timestamps null: false - end - end -end -``` - diff --git a/src/sections/active-record/crud.md b/src/sections/active-record/crud.md deleted file mode 100644 index b04f131..0000000 --- a/src/sections/active-record/crud.md +++ /dev/null @@ -1,163 +0,0 @@ -# crud - -
    - -* active record - -
    ----- -## ¿Qué es CRUD? -CRUD significa **C**reate, **R**ead, **U**pdate, **D**elete. - -
    - -> En criollo solemos decirle ABM, aunque nos falta una letra para que sea -completa la comparación. -
    ----- - -## Creación -* Los objetos Active Record pueden crearse desde: - * Un Hash - * Un bloque - * Setear manualmente los atributos luego de la creación -* El método `new` retornará un objeto **nuevo** mientras que `create` retornará - un objeto y lo **guardará** en la base de datos ----- - -## Creación - -Creamos usando un hash: -```ruby -user = User.create(name: "David", - occupation: "Code Artist") -``` - -
    - -Es lo mismo que hacerlo con atributos: -```ruby -user = User.new -user.name = "David" -user.occupation = "Code Artist" -user.save -``` -
    ----- - -## Creación - -Creación con bloques - -```ruby -user = User.new do |u| - u.name = "David" - u.occupation = "Code Artist" -end -``` - -> funciona tanto con **`new`** como **`create`**. - ----- -## Lectura - -```ruby -# return a collection with all users -users = User.all - -# return the first user -user = User.first - -# find all users named David who are Code Artists and -# sort by created_at inreverse chronological order -users = User.where(name: 'David', - occupation: 'Code Artist'). - order('created_at DESC') -``` - ----- -## Actualización - -Una vez que un dato es recuperado, sus atributos pueden modificarse y luego -almacenarse en la base de datos nuevamente - -```ruby -user = User.find_by(name: 'David') -user.name = 'Dave' -user.save - -# Lo mismo pero más corto -user = User.find_by(name: 'David') -user.update(name: 'Dave') - -# Para cambios masivos -User.update_all "max_attempts = 3, must_change_pwd = 'true'" -``` - ----- -## Eliminación - -De igual forma, una vez recuperado un objeto Active Record, podrá destruirse -y a su vez eliminarse de la base de datos - -```ruby -user = User.find_by(name: 'David') -user.destroy -``` - ----- - -## Validaciones - -* Active Record permite validar el estado de un modelo antes de que sea escrito - a la base de datos. -* Existen varios mecanismos para validar y chequear que ciertos atributos no - sean blanco, no vacío, únicos, tener un formato específico, etc. -* Las validaciones deben ser consideradas a la hora de persistir datos en la - base de datos. ----- - -## Validaciones -* Los métodos como `create`, `save` y `update` usan validaciones. -* Retornan `false` cuando la validación falla y no actualizan el dato en la - base de datos. -* Todos estos métodos tiene sus correspondientes con `bang!` (**`create!`**, - **`save!`** y **`update!`**) que son estrictos en cuanto a lanzar una - excepción **`ActiveRecord::RecordInvalid`** cuando la validación falla. - ----- - -## Validaciones - -
    -
    - -```ruby -class User < ActiveRecord::Base - validates :name, presence: true -end -``` -
    -
    - -```ruby -User.create -# => User not persisted -User.create! -# => ActiveRecord::RecordInvalid: -# Validation failed: -# Name can't be blank -``` -
    -
    - ----- -## Callbacks - -* Active Record callbacks permiten adjuntar código a ciertos eventos en el ciclo - de vida de los modelos. -* Permiten agregar comportamiento a los modelos que es ejecutado de forma transparente - cuando estos eventos suceden. -* Pueden agregarse eventos cuando se crea un nuevo registro, al modificarse, al - eliminarse, etc. - diff --git a/src/sections/active-record/introduccion.md b/src/sections/active-record/introduccion.md deleted file mode 100644 index c910d0a..0000000 --- a/src/sections/active-record/introduccion.md +++ /dev/null @@ -1,184 +0,0 @@ -# introducción - -
    - -* active record - -
    ----- - -## Introducción - -* Conecta clases a tablas de una base de datos estableciendo una capa de - persistencia. -* La librería provee una clase base que al heredarse, mapea la nueva clase - con una tabla existente de una base de datos. -* En el contexto de una aplicación a estas clases se las llama **modelos**. -* Los modelos pueden conectarse con otros modelos usando **asociaciones**. ----- - -## Introducción - -* Se basa en convenciones de nombres de forma tal que utiliza el - nombre de una clase o asociación para establecer mapeos con tablas - de la base de datos y claves foráneas. -* A pesar de poder definir estos mapeos en forma explícita, es muy - recomendable seguir las convenciones de nombres, especialmente durante el - aprendizaje de la librería. ----- -## ORM - -* Object Relational Mapping (ORM) es una técnica que conecta objetos de una - aplicación a tablas de un RDBMS. -* Utilizando ORM, las propiedades y relaciones de los objetos en una aplicación - pueden ser fácilmente almacenados y recuperados de una base de datos **sin** - escribir SQL directamente, minimizando el código de base de datos. - ----- -## AR como Framework de ORM - -* Representa modelos y sus datos. -* Representa asociaciones entre los modelos. -* Representa herencia entre modelos. -* Validaciones de modelos antes de ser persistidos. -* Operaciones de bases de datos de forma orientada a objetos. - ----- -## CoC - -_Conventioin over Configuration_ - -* Si se siguen las convenciones adoptadas por Rails, será - necesario escribir muy pocas configuraciones (en algunos casos ninguna - configuración) para crear modelos. -* La configuración explícita será necesaria sólo cuando no pueda seguirse la - convención estándar. - ----- -## Ejemplo - -Active Record mapea automáticamente entre tablas y clases, atributos y -columnas: - -
    - -
    - -```ruby -class Product < ActiveRecord::Base -end -``` - -La clase **`Product`** se mapea automáticamente a la tabla llamada **`products`** - - -
    -
    - -```sql -CREATE TABLE products ( - id int(11) NOT NULL auto_increment, - name varchar(255), - PRIMARY KEY (id) -); -``` -
    -
    -
    - -Además se definen accessors para cada campo. En el ejemplo serían **`name`** y -**`name=`**. - -[Acceso a un ejemplo -completo](https://github.com/ttps-ruby/ttps-ruby.github.io/tree/master/ejemplos/ar/00-introduccion) -
    ----- -## Convenciones de nombres - -Los nombres de las clases se pluralizan para encontrar las tablas -* **`Book`** se mapea a **`books`** -* El mecanismo de pluralización puede tanto pluralizar como singularizar - palabras regulares como irregulares. -* Cuando un modelo utiliza más de una palabra las clases utilizan **CamelCase** - y las tablas **snake_case**. Por ejemplo: la clase **`BookClub`** se mapeará con - la tabla **`book_clubs`**. - ----- -## Ejemplo de mapeos - -
    - -Las definiciones de estos mapeos son mediante otra gema llamda -**`ActiveSupport`**. - -| Modelo / Clase | Tabla / Schema| -|----------------|---------------| -| Post | posts | -| LineItem | line_items | -| Deer | deers | -| Mouse | mice | -| Person | people | - -
    - -Ver [ActiveSupport::Inflector](http://api.rubyonrails.org/classes/ActiveSupport/Inflector.html) - -``` -irb -r active_support/all -ActiveSupport::Inflector.pluralize 'person' -``` - -
    -
    ----- - -## Convenciones - -Active Record utiliza convenciones para las columnas de las tablas, -dependiendo del propósito de estas columnas. ----- - -## Convenciones - -* **Claves foráneas:** deben llamarse de la siguiente forma: - **`nombre_en_singular_id`** (por ejemplo: `item_id`, `order_id`). Estos serán - los campos por los que AR buscará cuando se creen asociaciones entre - modelos. -* **Claves primarias:** por defecto, AR utilizará una columna de - tipo entero llamada **`id`** como clave primaria. Cuando se usan *Migraciones de - AR* para crear las tablas, esta columna se creará automáticamente. - ----- - -## Convenciones - -* **`created_at`:** esta columna automáticamente setea la fecha y hora cuando el - registro es creado. -* **`updated_at`:** esta columna automáticamente setea la fecha y hora cuando el - registro es actualizado. -* **`lock_version`:** agrega [optimistic - locking](http://api.rubyonrails.org/classes/ActiveRecord/Locking/Optimistic.html) al modelo -* **`type`:** especifica que el modelo utiliza [Single Table - Inheritance](http://api.rubyonrails.org/classes/ActiveRecord/Base.html#label-Single+table+inheritance). ----- - -## Convenciones - -* **`(association_name)_type`:** especifica el tipo de [asociaciones - polimórifcas](http://edgeguides.rubyonrails.org/association_basics.html#polymorphic-associations). -* **`(table_name_plural)_count`:** usado para cachear el número de registros que pertenecen - a una asociación. Por ejemplo, una columna `comments_count` en la clase `Post` que tiene muchas instancias de `Comment`, cacheará el número de comentarios existentes para cada post. - ----- -## Ejemplo más completo - -* Usaremos herencia (STI). Para ello la superclase **debe tener(** un campo **`type`**. -* Activamos logs de AR con **`ActiveRecord::Base.logger`** -* Mostraremos además el uso de cache de una asociación. Para ello se habilita - creando un campo **`asociacion_en_plural_count`** y agregando un modificador - a la asociación: **`belongs_to` llamado `counter_cache: true`** - -
    - -[Ver ejemplo](https://github.com/TTPS-ruby/ttps-ruby.github.io/tree/master/ejemplos/ar/01-sti-logs-cache) -
    diff --git a/src/sections/active-record/migraciones.md b/src/sections/active-record/migraciones.md deleted file mode 100644 index d9f1fee..0000000 --- a/src/sections/active-record/migraciones.md +++ /dev/null @@ -1,69 +0,0 @@ -# migraciones - -
    - -* active record - -
    ----- -## ¿Qué son las migraciones? - -* Son una implementación de [schema migrations](https://en.wikipedia.org/wiki/Schema_migration). -* Las migraciones son una DSL para el manejo de esquemas de bases de datos - llamados migraciones -* Las migraciones se almacenan en archivos que son ejecutados contra una base de - datos soportada por Active Record usando `rake` - ----- - -## Migraciones - -Ejemplo de una migración que crea una tabla - -
    - -```ruby -class CreatePublications < ActiveRecord::Migration - def change - create_table :publications do |t| - t.string :title - t.text :description - t.references :publication_type - t.integer :publisher_id - t.string :publisher_type - t.boolean :single_issue - - t.timestamps - end - add_index :publications, :publication_type_id - end -end -``` -
    - ----- - -## Migraciones - -* Las migraciones permiten tener un registro en la misma base de datos que - indica qué cambios se han aplicado -* Los cambios entonces pueden versionarse y comitirse o deshacerse en la base de - datos -* Para aplicar las migraciones pendientes: `rake db:migrate` -* Para deshacer un cambio hecho: `rake db:rollback` -* La DSL es agnóstico a la base de datos: funciona en MySQL, SQLite, Oracle, - Postgres, etc - ----- - -## Ejemplo de migraciones - -[Ver ejemplo](https://github.com/ttps-ruby/ttps-ruby.github.io/tree/master/ejemplos/ar/02-migrations) - ----- -### Alternativas a las Migraciones - -Otros productos que ofrecen alternativas son: - - * https://flywaydb.org/ - * http://www.liquibase.org/ diff --git a/src/sections/active-record/referencias.md b/src/sections/active-record/referencias.md deleted file mode 100644 index 2d9e074..0000000 --- a/src/sections/active-record/referencias.md +++ /dev/null @@ -1,17 +0,0 @@ -# referencias - -
    - -* active record - -
    ----- -## Referencias - -* [API](http://api.rubyonrails.org/classes/ActiveRecord/Base.html) -* [Active Record base](http://edgeguides.rubyonrails.org/active_record_basics.html) -* [Active Record Associations](http://guides.rubyonrails.org/association_basics.html) -* [Active Record Querying](http://edgeguides.rubyonrails.org/active_record_querying.html) -* [Active Record Validations](http://edgeguides.rubyonrails.org/active_record_validations.html) -* [Active Record Callbacks](http://edgeguides.rubyonrails.org/active_record_callbacks.html) -* [Active Record Migrations](http://edgeguides.rubyonrails.org/migrations.html) diff --git a/src/sections/active-record/validaciones.md b/src/sections/active-record/validaciones.md deleted file mode 100644 index 5dc89d1..0000000 --- a/src/sections/active-record/validaciones.md +++ /dev/null @@ -1,371 +0,0 @@ -# validaciones - -
    - -* active record - -
    - ----- -## Introducción - -Garantizan que se guarden **datos válidos** en la base de datos. - ----- - - -## Alternativas - -Utilizar validaciones en la **propia base o usar store procedures** dificultan -la portabilidad de la aplicación a otros motores. Además no es simple -realizar los tests de la aplicación. Sin embargo, no es una mala práctica -aplicar restricciones en la base de datos como complemento. - ----- - -## Alternativas - -Validar del **lado del cliente** usando por ejemplo javascript. Esta funcionalidad no -garantiza consistencia dado que podrían enviarse datos no validados de forma -intencional. - ----- - -## Alternativas - -Validaciones **en el controlador** podría ser otra alternativa. Sin embargo el -testeo de los controladores se complejizaría. Por otra parte es una buena -idea mantener los controladores bien delgados - ----- -### ¿Cuándo ocurren las validaciones? - -* Hay dos tipos de objetos en AR: - * Los que corresponden a una fila de la base de datos - * Los que aún no están en la DB. Por ejemplo los objetos creados con `.new` - hasta que no se les diga `save` ----- - -### ¿Cuándo ocurren las validaciones? - - -Exite el método **`.new_record?`** que indica la situación de un objeto - -```ruby -Person = Class.new(ActiveRecord::Base) -p = Person.new(name: "John Doe") -p.new_record? -p.save -p.new_record? -``` - ----- - -### ¿Cuándo ocurren las validaciones? - -* Crear y guardar un objeto mapea a un **`INSERT`**. -* Actualizar un objeto mapea a un **`UPDATE`**: - -> Antes de estas acciones, se realizan las validaciones. Si alguna de las -> validaciones **falla** entonces el objeto será marcado como **inválido** y -> ActiveRecord no realizará la acción. - -
    - -_Hay muchas formas de cambiar el estado de un objeto en la DB. Algunos métodos -**realizarán validaciones, pero otros no**, significando que podrían guardarse -datos **inválidos** en la DB._ -
    - ----- - -### ¿Cuándo ocurren las validaciones? - -
    - -
    - -Métodos que realizan validaciones - -```ruby -create -create! -save # Puede recibir validate: false -save! -update -update! -``` -
    -
    - -Métodos que NO realizan validaciones - -```ruby -decrement! -decrement_counter -increment! -increment_counter -toggle! -touch -update_all -update_attribute -update_column -update_columns -update_counters -``` -
    -
    - ----- -## #valid? e #invalid? - -Independientemente de los métodos antes mencionados que lanzan -validaciones, puede utilizarse **`valid?`** e **`invalid?`** para lanzar -validaciones: - -```ruby -class Person < ActiveRecord::Base - validates :name, presence: true -end - -Person.create(name: "John Doe").valid? # => true -Person.create(name: nil).valid? # => false -``` - ----- -## Los errores - -* Una vez que se realizaron las validaciones, AR almacenará los errores en - **`errors.messages`**, una colección de errores indexada por el campo con errores. -* Por definición un objeto será valido si la colección de errores es vacía luego - de correr las validaciones. -* Notar que un objeto creado con `new` que técnicamente es erróneo, no muestra -errores porque aún no se han corrido las validaciones. - ----- -### Helper: acceptance - -* Se utiliza específicamente en aplicaciones WEB donde se espera que un checkbox - sea tildado por el usuario. -* No es necesario que la base de datos tenga un atributo, sino que el helper - creará un campo virtual para este propósito. - -```ruby -class Person < ActiveRecord::Base - validates :terms_of_service, acceptance: true -end -``` - ----- -### Helper: validates_associated - -* Valida las asociaciones relacionadas al objeto. -* No debe utilizarse en ambas partes de una asociación porque puede terminar en - **loop infinito**. - -```ruby -class Library < ActiveRecord::Base - has_many :books - validates_associated :books -end -``` - ----- - -### Helper: confirmation - -* Se utiliza cuando dos campos de texto deben contener el mismo dato: por - ejemplo que las direcciones de mail y su confirmación sean similares. -* El campo de confirmación no debe existir, sino que crea un campo virtual - llamado `_confirmation`. -* El chequeo es realizado sólo si el campo `_confirmation` no es nil, por lo que - debe asegurarse su existencia. - ----- - -### Helper: confirmation - -```ruby -class Library < ActiveRecord::Base - validates :email, confirmation: true - validates :email_confirmation, presence: true -end -``` - ----- -### Helper: exclusion/inclusion - -Se utilizan para validar la (ex/in)clusión de valores admisibles: - -```ruby -class Library < ActiveRecord::Base - validates :subdomain, - exclusion: { in: %w(www us ca jp) -end - -class Coffee < ActiveRecord::Base - validates :size, - inclusion: { in: %w(small medium large), - message: "%{value} is not a valid size" } -end -``` - ----- -### Helper: format - -Validan el formato con una expresión regular que se especifica usando la -opción `with:` - -```ruby -class Product < ActiveRecord::Base - validates :legacy_code, format: { - with: /\A[a-zA-Z]+\z/, - message: "only allows letters" } -end -``` - ----- -### Helper: length - -Valida la longitud de un campo de diversas formas: - -```ruby -class Person < ActiveRecord::Base - validates :name, length: { minimum: 2 } - validates :bio, length: { maximum: 500 } - validates :password, length: { in: 6..20 } - validates :registration_number, length: { is: 6 } -end -``` - ----- - -### Helper: numericality - -* Valida que el campo contenga sólo valores numéricos. -* Por defecto aceptará un signo opcional seguido de un entero o punto flotante. -* Para validar sólo enteros, puede usarse la opción `only_integer`. -* Además se admiten muchas otras opciones: `:greater_than`, - `:greater_than_or_equal_to`, `:equal_to`, `:less_than`, - `:less_than_or_equal_to`, `:odd`, `:even` - ----- - -### Helper: numericality - -```ruby -class Player < ActiveRecord::Base - validates :points, numericality: true - validates :games_played, - numericality: { only_integer: true } -end -``` ----- - -### Helper: presence/absence - -Valida que el atributo esté o no presente (esté vacío) usando `blank?` para -verificar si un valor es `nil` o un string blanco (esto es vacío o consiste de -espacios). Incluso permite validar que una asociación esté presente. - ----- - -### Helper: presence/absence -```ruby -class Person < ActiveRecord::Base - validates :name, :login, :email, presence: true -end - -# Es importante para usar el siguiente ejemplo que la -# asociación use inverse_of -class LineItem < ActiveRecord::Base - belongs_to :order - validates :order, presence: true -end - -class Order < ActiveRecord::Base - has_many :line_items, inverse_of: :order -end -``` ----- - -### Helper: presence/absence - -* Dado que **`false.blank?`** es **`true`**, hay que tener especial cuidado con campos - booleanos. -* En el siguiente ejemplo se muestra de qué forma es posible eliminar la - posibilidad que el campo sea **`nil`**. - ----- - -### Helper: presence/absence - -```ruby -validates :boolean_field_name, inclusion: { in: [true, false] } -validates :boolean_field_name, exclusion: { in: [nil] } -``` - -> Para el caso de `absence` es necesario algo como: `validates :field_name, -> exclusion: { in: [true, false]` considerando que `false.present?` devuelve -> `false` ----- -### Helper: uniqueness - -* Valida la unicidad de un campo antes que sea guardado. -* No considera unicidad en la base de datos - * Por lo que dos conexiones diferentes podrían crear el mismo dato que - esperamos sea único. - * Para evitar esto, es aconsejable agregar una restricción a nivel motor de la - DB. ----- - -### Helper: uniqueness - - -```ruby -class Account < ActiveRecord::Base - validates :email, uniqueness: true -end -``` ----- - -### Helper: uniqueness - -```ruby -class Holiday < ActiveRecord::Base - validates :name, uniqueness: { - scope: :year, - message: "should happen once per year" } -end - -class Person < ActiveRecord::Base - validates :name, - uniqueness: { case_sensitive: false } -end -``` - -> Existe la posibilidad de explicitar un alcance de la unicidad de forma de -> combinar con otros campos. -> Es posible especificar otra opción `case_sesitive` para verificar la unicidad -> considerando este factor o no. ----- -### Validaciones condicionales - -* Algunas situaciones ameritan validar si un predicado es verdadero. -* Esto es posible con las opciones `:if` y `:unless` que reciben: - `Proc`, un string o arreglo. ----- -### Validaciones condicionales - -* **Un símbolo:** invocará un método del modelo -* **Un string:** se interpreta como código ruby como por ejemplo `validates - :surname, presence: true, if: "name.nil?"` -* **Un Proc:** permite escribir código inline en vez de delegarlo a un método -* **Un arreglo**: combina multiples condiciones. Por ejemplo: `if: - ["market.retail?", :desktop?]` - ----- -## Ejemplo de validaciones - -[Ver -ejemplo](https://github.com/ttps-ruby/ttps-ruby.github.io/tree/master/ejemplos/ar/03-validaciones) diff --git a/src/sections/gemas.md b/src/sections/gemas.md deleted file mode 100644 index 2407bd4..0000000 --- a/src/sections/gemas.md +++ /dev/null @@ -1,222 +0,0 @@ -# Gemas - -
    - -* gem cli -* bundler -
    ----- -# gem cli - -
    - -* gemas - -
    ----- -## Introducción - -* Una gema es un formato simple para publicar y compartir código Ruby. -* Cada gema tiene un nombre, versión y plataforma. - ----- -## CLI - -* **Instalar una gema:** `gem install rake` -* **Buscar una gema:** `gem search sinatra` -* **Listar gemas instaladas:** `gem list` ----- -# bundler - -
    - -* gemas - -
    ----- -## Introducción - -* Mantiene un entorno consistente para las aplicaciones ruby -* Asegura que la aplicación que lo use tenga las dependencias necesarias - para que se ejecute sin errores. -* Bundler es una gema: `gem install bundler` - -
    - -Bundler es análogo a [composer para PHP](https://getcomposer.org/), -[Pipenv para Python](https://pipenv.pypa.io/en/stable/), [maven para java](https://maven.apache.org/), -[npm](https://www.npmjs.com/) o [yarn](https://yarnpkg.com/) para Javascript. -**El manejo de dependencias debe realizarse según el [segundo factor de 12-factor -apps](https://12factor.net/dependencies)**. -
    ----- -## Ejemplo de uso - -Definimos las dependencias en el archivo `Gemfile` - -```ruby -source 'https://rubygems.org' - -gem 'sinatra' -``` - -
    - -Luego instalamos las dependencias con **`bundle install`** o simplemente **`bundle`**. -
    - ----- -## Comandos - -```bash -# Instalar dependencias: -bundle install - -# Actualizar dependencias a sus últimas versiones: -bundle update - -# Ejecutar un script en el contexto del bundle actual: -bundle exec - -# Ver las gemas instaladas en el bundle actual: -bundle list - -# Ver donde está ubicada una gema: -bundle show NOMBRE_GEMA -``` - ----- -## Gemfile - -* Se escribe con una DSL propia de bundler. -* Puede incluir cualquier código ruby. -* La sentencia **`gem`** indica una dependencia y acepta los siguientes -parámetros: - * **versión:** `'>= 1.1.0'`, `'~> 3.1.2'` - * **github:** `github: 'sinatra/sinatra'` - * **path:** para una gema local - ----- -## Ejemplo - -```ruby -source 'https://rubygems.org' -gem 'sinatra', github: 'sinatra/sinatra' -gem 'activerecord', '~> 3.1.0' -``` - ----- -## Uso de gemas - -Con declarar las dependencias en el `Gemfile` no basta, hay que invocar a -bundler desde el código. - -
    - -
    - -```ruby -require 'bundler' -Bundler.require - - -``` -
    -Bundler requiere todas las dependencias. -
    -
    - -
    - -```ruby -require 'bundler' -Bundler.setup -require 'sinatra' -``` -
    -Bundler configura pero los require deben ser explícitos. -
    -
    -
    ----- - -## Gemfile - -Es posible definir la fuente de donde obtener las gemas: - -```ruby -source 'https://rubygems.org' -``` - -
    - -Incluso es posible hacerlo por gema o grupo de gemas -
    - ----- - -## Gemfile - -Es posible también indicar cómo sea **require una gema**: - -```ruby -gem "redis", :require => ["redis/connection/hiredis", "redis"] -gem "webmock", :require => false -``` - ----- - -## Gemfile - -Y por supuesto es posible definir la Versión de una gema: - -```ruby -gem 'rails', '5.0.0' -gem 'rack', '>=1.0' -gem 'thin', '~>1.1' -``` - ----- - -## Gemfile - -* También es posible establecer tag, branch o ref de un repo git. -* Grupos de gemas con el fin de poder requerir o instalarlas en forma modular. -* Plataforma para la cual aplican determinadas gemas. - ----- -## Ejemplo - -```ruby -source 'https://rubygems.org' - -gem 'thin', '~>1.1' - -gem 'rspec', :require => 'spec' - -gem 'my_gem', '1.0', :source => 'https://gems.example.com' - -gem 'mysql2', platform: :ruby -gem 'jdbc-mysql', platform: :jruby -gem 'activerecord-jdbc-adapter', platform: :jruby - -source 'https://gems.example.com' do - gem 'another_gem', '1.2.1' -end - -gem 'nokogiri', - :git => 'https://github.com/tenderlove/nokogiri.git', - :branch => '1.4' - -gem 'extracted_library', :path => './vendor/extracted_library' - -gem 'wirble', :group => :development -gem 'debugger', :group => [:development, :test] -group :test do - gem 'rspec' -end -``` -
    - -[Ver ejemplo de Redmine](https://github.com/redmine/redmine/blob/master/Gemfile) -
    diff --git a/src/sections/introduccion.md b/src/sections/introduccion.md deleted file mode 100644 index 51fa3bd..0000000 --- a/src/sections/introduccion.md +++ /dev/null @@ -1,21 +0,0 @@ -# Introducción - -
    - -* historia -* el lenguaje -* interpretes -
    - ---- - -FILE: introduccion/historia.md - ---- - -FILE: introduccion/lenguaje.md - ---- - -FILE: introduccion/interpretes.md - diff --git a/src/sections/introduccion/historia.md b/src/sections/introduccion/historia.md deleted file mode 100644 index 8a161db..0000000 --- a/src/sections/introduccion/historia.md +++ /dev/null @@ -1,75 +0,0 @@ -# Historia - -
    - -* introducción -
    ----- -## [Yukihiro Matsumoto](https://en.wikipedia.org/wiki/Yukihiro_Matsumoto) - - -
    -
    - - ![Yukihiro Matsumoto](static/yukihiro-matsumoto.jpg) - -
    -
    - - ![Ruby](static/logo.svg) - * En japonés: 松本行弘 (まつもとゆきひろ) - * Matz más simple - * Empezó el desarrollo de Ruby en 1993 - * En 1995 lanzó la primera versión - * Aún lidera el desarrollo de Ruby -
    -
    - - - -## Su célebre frase - - Ruby is designed to make programmers **HAPPY** - - - ----- - -## ¿Cómo surge Ruby? - -* Fusión de lenguajes - * Smalltalk - * Perl - * LISP -* Hasta el 2001 conocido sólo en Japón - * El libro [Programming Ruby](https://pragprog.com/titles/ruby5/programming-ruby-3-3-5th-edition/) - fue el impulsor del lenguaje fuera de Japón - * También conocido como PickAxe - * La primera versión puede [leerse en línea](https://ruby-doc.org/docs/ProgrammingRuby/) - ----- - -## ¿Cómo surge Ruby? - -![pickaxe](static/pickaxe.jpg) - ----- -## [David Heinemeier Hansson](https://en.wikipedia.org/wiki/David_Heinemeier_Hansson) - -
    -
    - -![DHH](static/dhh.jpg) - -
    -
    - -![Rails](static/rails.svg) - - * Creador de [Rails](https://rubyonrails.org/): _framework open source para desarrollo de aplicaciones web_ - * Su primer versión liberada (1.0) fue en 2005 - -
    -
    - - diff --git a/src/sections/introduccion/interpretes.md b/src/sections/introduccion/interpretes.md deleted file mode 100644 index 48ea482..0000000 --- a/src/sections/introduccion/interpretes.md +++ /dev/null @@ -1,73 +0,0 @@ -# Intérpretes - -
    - -* introducción -
    - ----- - -Ruby como lenguaje, tiene varias implementaciones. La implementación de -referencia es conocida como **MRI: _Matz’s Ruby Interpreter_** o **CRuby** -(porque está desarrollada en C), pero existen otras implementaciones. - ----- - -## MRI - -* **Homepage:** https://www.ruby-lang.org/ -* Matz' Ruby Implementation -* También llamada CRuby -* Es la implementación de referencia del lenguaje -* Versiones - * **1.8.x** - * **1.9.x** - * **2.x** - * **3.x** _Ruby 3 will be 3 times faster_ - ----- -## JRuby - - -* **Homepage:** https://www.jruby.org/ -* Ruby en la **JVM de Java** -* Es la alternativa más madura a MRI en términos de compatibilidad con MRI -* Ventajas: - * Concurrencia real - * Interoperabilidad con librerías Java - - - ----- -## Rubinius - -* **Homepage:** https://github.com/rubinius/rubinius -* Comenzó como un experimento que comenzó como una implementación de Ruby, pero - en realidad apunta a extender las limitaciones de Ruby. -* Su diseño se enfoca en la concurrencia. -* La VM fue escrita en C++ - ----- -## TruffleRuby - -* **Homepage:** https://github.com/oracle/truffleruby -* Es una implementación de alta performance de Ruby creada por Oracle. -* Permite correr código en paralelo y el startup de aplicaciones ruby es mucho - menor. -* Basado en [GraalVM](http://graalvm.org/). - - ----- -## ¿Cómo trabajar con ruby? - -* Mayormente la gestión del ambiente de trabajo con ruby se realiza con alguna - de las siguientes herramientas: - * [**RVM:** Ruby Version Manager](https://rvm.io/) - * [**rbenv:** Ruby environment](https://github.com/rbenv/rbenv) - * [**asdf**](https://asdf-vm.com/) con el plugin [**asdf - ruby**](https://github.com/asdf-vm/asdf-ruby) - * _Ruby instalado como paquete del propio sistema no es recomendado._ - -> El uso, instalación y manejo de los entornos serán abordados en el espacio de -> las prácticas - diff --git a/src/sections/introduccion/lenguaje.md b/src/sections/introduccion/lenguaje.md deleted file mode 100644 index 547b48f..0000000 --- a/src/sections/introduccion/lenguaje.md +++ /dev/null @@ -1,326 +0,0 @@ -# El lenguaje - -
    - -* introducción -
    - ----- -# El lenguaje - -* Dinámico -* Sintaxis concisa y expresiva -* Orientado a objetos -* Capacidades de metaprogramación -* Características funcionales - ----- -## Sintaxis y convenciones - -Nombres válidos y convenciones: - -```ruby - NombreDeClaseOModulo - CONSTANTE - @nombre_de_atributo - @@atributo_de_clase - $variable_global - nombre_de_metodo - metodo_peligroso! - metodo_que_pregunta? -``` - ----- -## Objetos - -Todos los valores son **objetos** - -```ruby -"Aprendiendo ruby".length -"Aprendiendo ruby".each_char.sort.join -1 + 2 -1.send :+, 2 -``` -## Arreglos - -```ruby -["Go", "Ruby", "Java", "Python", "PHP", "Javascript"].sort -([1,2,3] + [4,5,6]).last -``` - ----- - - -## Números - -```ruby --100.abs -1_123_456 * 1_000_000 -1.5 * 3 -0b1000_1000 # Binario => 136 -010 # Octal => 8 -0x10 # Hexadecimal => 16 -``` - -
    -
    - -### nil - -```ruby -a = Array.new -a[10].nil? -nil.nil? -``` - -
    -
    - -### object id - -```ruby -1.object_id -nil.object_id -``` -
    -
    ----- - -## Strings - -
    -
    - -### Literales - -```ruby -'sin interpolar' -"Interpolando: #{'Ja'*3}!" - -# Notación alternativa -%q/Hola/ -%q!Chau! -%Q{Interpolando: #{3+3}} -``` -
    -
    - -### Here document - -```ruby -un_string = <<-EOS - Este es un texto - de mas de una linea - que termina aqui. - Se puede observar que - espacios antes de cada - linea. -EOS - -un_string.upcase -``` -
    -
    - ----- -## Símbolos - -* Son como variables prefijados con **:** (dos puntos) - * Ejemplos: `:action`, `:line_items`, `:+` -* No es necesario declararlos -* Se garantiza que son únicos - * No es necesario asignarles ningún valor - -```ruby - -:uno.object_id # siempre devolverá lo mismo -"uno".object_id # siempre devolverá diferente - -``` ----- -## Colecciones - -
    -
    - -### Arreglos - -```ruby - -['Hola', 'Chau'] - -# sin interpolar -%w(Hola Chau #{2+2}) - -# interpolando -%W(Hola Chau #{2+2}) - -[1,2,3,4] -``` - -
    -
    - - -### Hashes - -```ruby -# Versión 1.8 -{ - :nombre => 'Christian', - :apellido => 'Rodriguez' -} -# Versión > 1.8 -{ - nombre: 'Christian', - apellido: 'Rodriguez' -} -``` - -
    -
    - ----- -## Expresiones regulares - -```ruby -/^[a-zA-Z]+$/ -"Do you like cats?" =~ /like/ -"192.168.0.10" =~ /^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/ -``` - - -> Explicación en [Pickaxe](https://ruby-doc.com/docs/ProgrammingRuby/html/intro.html#S5). -> Con [Rubular](https://rubular.com/) es posible probarlas. ----- -
    -
    - -## Rangos - -```ruby - -0..1 -0..10 -"a".."z" -"a"..."z" - -# Pueden convertirse en arreglos -("a"..."z").to_a - -# Rangos como intervalos -(1..10) === 5 # => true -(1..10) === 15 # => false -(1..10) === 3.1 # => true - -``` - -
    -
    - -## Expresiones - -``` -a = 3.14 # => 3.14 - -# Veamos el case -estado = nil -face = case estado - when "Feliz" then ":)" - when "Triste" then ":(" - else ":|" -end - -``` - - -> En Ruby toda expresión retorna un valor - -
    -
    - ----- - -
    -
    - -## Lambdas - -```ruby -uno = lambda { |n| n * 2 } -dos = ->(n, m){ n * 2 + m } -tres = ->(n, m=0){ n * 2 + m} - -# Entonces - -uno.call 2 # => 4 -dos.call 2,3 # => 7 -tres.call 2 # => 4 -``` -
    -
    - -## Bloques - - -```ruby -3.times do |i| - puts i -end - -3.times { |i| puts i } -``` - -> Rara vez usaremos un for / while - -
    -
    ----- - -## Ejemplos de bloques y colecciones - - -
    
-# Selección de números pares
-(1..10).select { |n| n.even? }
-
-# Procesar cada elemento de una colección
-(1..10).map { |n| n*2 }
-
-# Calcular con los elementos de la colección:
-(1..100).reduce { |sum,n| sum + n }
-
    - - - ----- - -## Ejemplos de bloques y colecciones - -
    
-# Selección de números pares
-(1..10).select { |n| n.even? }
-# o lo que es igual:
-(1..10).select(& :even?)
-
-# Procesar cada elemento de una colección
-(1..10).map { |n| n*2 }
-# o lo que es igual:
-(1..10).collect { |n| n*2 }
-
-# Calcular con los elementos de la colección:
-(1..100).reduce { |sum,n| sum + n }
-# o lo que es igual:
-(1..100).reduce(:+)
-
    - ----- -## Bloques y archivos - -```ruby - -File.open('/etc/passwd').each do |line| - puts line if line =~ /root/ -end -``` - diff --git a/src/sections/lenguaje.md b/src/sections/lenguaje.md deleted file mode 100644 index 86dbb55..0000000 --- a/src/sections/lenguaje.md +++ /dev/null @@ -1,42 +0,0 @@ -# Ruby - -
    - -* objetos y atributos -* clases y variables -* colecciones -* bloques e iteradores -* módulos -* excepciones -* conceptos avanzados -
    - ---- - -FILE: lenguaje/objetos.md - ---- - -FILE: lenguaje/clases-variables.md - ---- - -FILE: lenguaje/colecciones.md - ---- - -FILE: lenguaje/bloques-iteradores.md - ---- - -FILE: lenguaje/modulos.md - ---- - -FILE: lenguaje/excepciones.md - ---- - -FILE: lenguaje/conceptos-avanzados.md - - diff --git a/src/sections/lenguaje/bloques-iteradores.md b/src/sections/lenguaje/bloques-iteradores.md deleted file mode 100644 index 1802b47..0000000 --- a/src/sections/lenguaje/bloques-iteradores.md +++ /dev/null @@ -1,860 +0,0 @@ -# Bloques e iteradores - -
    - -* ruby - -
    - ----- - -## Bloques -* Un bloque es código encerrado entre llaves o las palabras claves `do` y `end`. -* Ambas formas son idénticas, salvo por la precedencia. - * Cuando el código del bloque entra en una línea usar {}. - * Cuando tiene más de una línea usar `do` / `end`. -* Los bloques pueden verse como métodos anónimos. - ----- - -## Bloques -* Pueden recibir parámetros, que se explicitan entre barras verticales `|`. -* El código de un bloque no se ejecuta cuando se define, sino que se almacenará - para ser ejecutado más adelante. -* En ruby, los bloques sólo podrán usarse después de la *invocación* de algún - método: - * Si el método recibe parámetros, entonces aparecerá luego de ellos. - * Podría verse incluso como un parámetro extra que es pasado al método. - ----- - -## Ejemplo - -Suma de los cuadrados de los números en un arreglo - -
    -
    - -```ruby -sum = 0 -[1, 2, 3, 4].each do |value| - square = value * value - sum += square -end -puts sum -``` - -
    -
    - -* El bloque se invoca para cada elemento en el arreglo -* El elemento del arreglo es pasado al bloque en la variable `value` -* La variable `sum` declarada fuera del bloque es actualizada dentro del bloque -
    -
    - ----- -## Bloques - -* **Regla importante:** *si existe una variable en el bloque con el mismo - nombre que una variable dentro del alcance pero creada fuera del bloque, ambas serán la - misma variable. En el ejemplo hay sólo una variable `sum`* -* Veremos que el comportamiento mencionado podremos cambiarlo -* Si una variable aparece sólo en el bloque, entonces será local al mismo (como -`square`) - ----- -## Un caso inesperado - -```ruby -# assume Shape defined elsewhere -square = Shape.new(sides: 4) -# -# .. lots of code -# -sum = 0 -[1, 2, 3, 4].each do |value| - square = value * value - sum += square -end - -puts sum -square.draw # BOOM! -``` - ----- -## Mas casos - -No sucede lo mismo con los argumentos al bloque - -```ruby -value = "some shape" -[ 1, 2 ].each {|value| puts value } -puts value -``` - -Podemos solucionar el problema de `square` - -```ruby -square = "some shape" -sum = 0 -[1, 2, 3, 4].each do |value; square| - square = value * value # different variable - sum += square -end -puts sum -puts square -``` - ----- -## La magia de los bloques - -
    - -* Mencionamos que los bloques se utilizan de forma adyacente a la llamada a un - método y que no se ejecutan en el momento en que aparecen en el código. -* Para lograr este comportamiento, dentro de un método cualquiera, podremos - invocar un bloque: - * Los bloques se invocarán como si fueran métodos. - * Para invocar un bloque se utiliza la sentencia `yield`. - * Al invocar `yield` ruby invocará al código del bloque . - * Cuando el bloque finaliza, ruby devuelve el código inmediatamente al - finalizar el llamado a `yield`. -
    ----- -## Ejemplo de un bloque - -```ruby - -def three_times - yield - yield - yield -end - -three_times { puts "Hola" } -``` - ----- - -## Parámetros a un bloque - -* Cuando utilizamos `yield` podemos enviarle un parámetro - * El parámetro enviado se mapea con el definido en el bloque entre las barras - verticales. -* Un bloque puede retornar un valor y ser usado en el método. - ----- -## Ejemplo de envío de parámetros - -```ruby - -def fib_up_to(max) - i1, i2 = 1, 1 - while i1 <= max - yield i1 - i1, i2 = i2, i1+i2 - end -end - -fib_up_to(1000) {|f| print f, " " } - -``` - ----- -## Uso del valor retornado - -```ruby - -class Array - def my_find - for i in 0...size - value = self[i] - return value if yield(value) - end - return nil - end -end - -(1..200).to_a.my_find {|x| x%5 == 0} - -(1..200).to_a.my_find {|x| x == 0} - -``` - ----- -## Los iteradores -* Las clases que implementan colecciones, como `Array` *hacen lo que hacen - mejor:* - * Acceder a los elementos que contienen. -* El comportamiento de qué hacer con cada elemento lo delegan a la aplicación: - * Permitiendo que nos concentremos sólo en un requerimiento particular. - * En los casos anteriores (`find`), sería encontrar un elemento para el cual - el criterio sea verdadero. - ----- -## each y collect - -* El iterador `each` es el más simple. - * Solo invoca `yield` para cada elemento. -* El iterador `collect` también conocido como `map`. - * Invoca `yield` para cada elemento. El resultado lo guarda en un nuevo - arreglo que es **retornado**. - -```ruby -[ 1, 3, 5, 7, 9 ].each {|i| puts i } - -['k','h','m','t','w'].collect {|x| x.succ } -``` - ----- -## Otros usos de iteradores - -* Los iteradores no sólo se usan con array y hash. -* Su lógica es muy utilizada en clases de entrada / salida para retornar - líneas sucesivas o bytes. - -```ruby -f = File.open("testfile") -f.each { |line| puts "The line is: #{line}"} -f.close -``` - - -```ruby -f = File.open("testfile") -f.each_with_index do |line, index| - puts "Line #{index} is: #{line}" -end -f.close -``` - ----- -## inject -* Este iterador tiene un nombre *raro*. -* Permite acumular un valor a lo largo de los miembros de una colección. -* Recibe un parámetro que es el valor inicial para comenzar a acumular. - * Si no se especifica **toma el primer elemento de la colección**. - -```ruby -[1,3,5,7].inject(0) {|sum, element| sum+element} -[1,3,5,7].inject {|sum, element| sum+element} -[1,3,5,7].inject(1) {|prod, element| prod*element} -[1,3,5,7].inject {|prod, element| prod*element} -``` - ----- -## inject - -Un uso más críptico de `inject`: - -```ruby -[1,3,5,7].inject(:+) -[1,3,5,7].inject 100, :+ -[1,3,5,7].inject(:*) -``` - ----- -## Problema de iteradores -* Los iteradores son muy cómodos pero: - * Son parte de la colección y no una clase a parte. - * En otros lenguajes (como Java), las colecciones no implementan sus - iteradores, sino que son clases separadas (como por ejemplo la interfaz - Iterator de Java). - * Es complicado iterar dos colecciones simultáneamente. - ----- -## Enumerators - -* La solución: clase `Enumerator`. -* Se obtiene de una colección con el método `to_enum` o `enum_for`. - -```ruby -a = [ 1, 3, "cat" ] -h = { dog: "canine", fox: "lupine" } -# Create Enumerators -enum_a = a.to_enum -enum_h = h.to_enum -enum_a.next # => 1 -enum_h.next # => [ :dog, "canine" ] -enum_a.next # => 3 -enum_h.next # => [ :fox, "lupine" ] -``` ----- -## Enumerators e iteradores - -Si un iterador se utiliza sin bloque, entonces retorna un Enumerator - -```ruby -a = [1,2,3].each -a.next -``` - ----- -## El método loop -
    - -* Ejecuta el código que se encuentra dentro del bloque. -* Se puede salir con break cuando se cumple una condición. -* Si hay iteradores, `loop` terminará cuando el Enumerator se quede sin valores. - -
    - -
    -
    - -```ruby - - -loop { puts "Hola" } - - - -``` -
    -
    - -```ruby -i=0 -loop do - puts i += 1 - break if i >= 10 -end -``` -
    -
    - -```ruby -short_enum = [1, 2, 3].to_enum -long_enum = ('a'..'z').to_enum -loop { puts "#{short_enum.next} - #{long_enum.next}" } -``` - ----- -## Enumerator como objeto - -Sabemos que es posible usar `each_with_index` en `Array` - -```ruby -result = [] -[ 'a', 'b', 'c' ].each_with_index do |item, index| - result << [item, index] -end -``` - -
    - -¿Y si queremos hacer lo mismo con un `String`? -
    - -
    - -* No existe `each_with_index` en `String`. -* Pero sí existe `each_char` que es como `each` de `Array` pero sobre cada - caracter del string. - * Si no enviamos un bloque, retornará un `Enumerator`. -* La interfaz `Enumerable` define el método `each_with_index`. -
    - ----- -## El código con String -```ruby -result = [] -"cat".each_char.each_with_index do |item, index| - result << [item, index] -end -# Aun más simple: -result = [] -"cat".each_char.with_index do |item, index| - result << [item, index] -end -``` - ----- -## Enumerator como generadores -
    - -* Podemos crear objetos enumerator explícitamente en vez de hacerlo a partir de - una colección. -* Para ello es necesario utilizar un bloque en la creación: - * El código del bloque se usará por el objeto Enumerator cada vez que el - programa principal le solicite un nuevo valor. - * Este bloque no se ejecutará como otros bloques dado que su ejecución - se disparará cada vez que se solicita el siguiente valor. - * La ejecución del bloque se pausa y vuelve al programa principal cuando se - encuentra `yield`. - * Cuando se solicita el siguiente valor, el código del bloque continúa a - partir de la línea siguiente al `yield`. -
    - ----- -## Enumerator como generadores -Generamos **secuencias infinitas**: - - -```ruby -fibonacci = Enumerator.new do |caller| - i1, i2 = 1, 1 - loop do - caller.yield i1 - i1, i2 = i2, i1+i2 - end -end - -6.times { puts fibonacci.next } -``` - -
    - -Como `Enumerator` es `Enumerable` sería posible: -
    - -```ruby -fibonacci.first(1000).last -``` - ----- -## ¡Hay que tener cuidado! - -
    - -* Cuidado con los enumerators que generan listas infinitas. -* Los metodos comunes de los enumeradores como `count` y `select` tratarán de - leer todos los elementos antes de retornar un valor. - * Podemos escribir la versión de `select` adecuada a nuestra lista - infinita. - -
    - -```ruby -def infinite_select(enum, &block) - Enumerator.new do |caller| - enum.each do |value| - caller.yield(value) if block.call(value) - end - end -end - -p infinite_select(fibonacci) {|val| val % 2 == 0}.first(5) -``` - ----- -## Solución conveniente -Podemos escribir filtros como `infinite_select` directamente en la clase -`Enumerator` - -``` ruby -class Enumerator - def infinite_select(&block) - Enumerator.new do |caller| - self.each do |value| - caller.yield(value) if block.call(value) - end - end - end -end - -p fibonacci. - infinite_select {|val| val % 2 == 0}. - infinite_select {|val| val.to_s =~ /13\d$/ }. - first(2) -``` - ----- -## Bloques como transacciones - -
    - -* Podemos usar bloques para definir código que debe ejecutarse bajo ciertas - condiciones transaccionales. -* Por ejemplo: - * Abrir un archivo - * Procesarlo - * Cerrarlo -* Si bien esto podemos hacerlo secuencialmente, utilizando bloques simplificamos - mucho. -
    - -```ruby -class File - def self.open_and_process(*args) - f = File.open(*args) - yield f - f.close() - end -end -``` - ----- -## Analizamos un poco... - -
    - -* El método de clase implementado fue desarrollado para que entienda los mismos - parámetros que `File.open`. -* Para ello, lo que hicimos es pasar los parámetros tal cual se enviaron a - `File.open`. - * Esto se logra definiendo como argumento al método `*args` que significa: - *tomar todos los argumentos enviados al método actual y colocarlos en un - arreglo llamado args*. - * Luego llamamos a `File.open(*args)`. Utilizar *args vuelve a expandir los - elementos del arreglo a parámetros individuales. -
    - ----- -## Versión completa de my_open -```ruby -class File - def self.my_open(*args) - result = file = File.new(*args) - if block_given? - result = yield file - file.close - end - return result - end -end -``` - - -> Esta técnica es tan útil, que `File.open` ya lo implementa. Además de usar `File.open` -> para abrir un archivo, podemos usarlo para directamente procesarlo como lo hacíamos -> con `open_and_process`. - ----- -## Bloques como objetos -* Anteriormente mencionamos que los bloques son como un parámetro - adicional pasado a un método. -* Podremos forzar bloques como parámetros explícitos: - * Utilizando & en el último parámetro, Ruby buscará el codigo - de un bloque cuando el método es invocado. - * Este parámetro podrá utilizarse como cualquier otro. - ----- -## Bloques como objetos - -```ruby -class ProcExample - def pass_in_block(&action) - @stored_proc = action - end - def use_proc(parameter) - @stored_proc.call(parameter) - end -end - -eg = ProcExample.new -eg.pass_in_block { |param| puts "The parameter is #{param}" } -eg.use_proc(99) -``` - -> Notar que pasando `&action` podemos almacenar el bloque en una variable. Si no -> se usara `&` no sería posible. ----- - -## Avanzando un poco más... -* Vemos que `call` invoca la ejecución del bloque. -* Muchos programas utilizan esta idea para implementar **callbacks**. -* ¿Qué pasaría si retornamos el bloque? - -```ruby -def create_block_object(&block) - block -end - -bo = create_block_object do |param| - puts "You called me with #{param}" -end -bo.call 99 -bo.call "cat" -``` - ----- -## Proc y lambda -* Devolver un bloque es tan útil que en Ruby hay dos formas de hacerlo: - * `lamda` y `Proc.new` toman un bloque y retornan un objeto. - * El objeto retornado es de la clase `Proc`. - -> Ya hemos mencionado que `lambda` controla los parámetros que requiere el -> bloque mientras que `Proc` no lo hace. - ----- -## Bloques como Closures -Los bloques pueden utilizar variables que están dentro del alcance del bloque. - -```ruby -def n_times(thing) - lambda {|n| thing * n } -end -p1 = n_times(10) -p1.call(3) -p1.call(4) -p2 = n_times("Hola ") -p2.call(3) -``` -> ¿Qué hace el ejemplo anterior? - ----- -## ¿Qué es un Closure? -* El método `n_times` referencia un parámetro `thing` que es usado dentro el bloque. -* Aunque en las llamadas a `call` el parámetro `thing` está fuera del alcance, - el parámetro se mantiene accesible dentro del bloque. - -_**Closure:** variables en el alcance cercano que son referenciadas por el bloque -se mantienen accesibles por la vida del bloque y la vida del objeto Proc creado -para este bloque._ - ----- -## Otro ejemplo de Closure - -```ruby -def what_do_i_do? - value = 1 - lambda { value += value } -end - -let_me_see = what_do_i_do? -let_me_see.call -let_me_see.call -``` - ----- -## Un closure en js - -```js -let multiplicar = ( x => (y) => x*y ) -multiplicar(2)(3) -``` - ----- -### Lambda: notación alternativa - -```ruby -lambda { |params| ... } -# es equivalente a -->params { ... } - -# Y con parámetros -proc1 = -> arg {puts "proc1:#{arg}" } -proc2 = -> arg1, arg2 {puts "proc2:#{arg1} y #{arg2}" } -proc3 = ->(arg1, arg2) {puts "proc3:#{arg1} y #{arg2}" } - -proc1.call "ant" -proc2.call "bee", "cat" -proc3.call "dog", "elk" -``` - ----- -## Custom while -Reimplementamos un while usando bloques - -
    - -
    - -### Proc -```ruby -def my_while(cond, &body) - while cond.call - body.call - end -end - -a = 0 -my_while(Proc.new { a < 3 }) do - puts a - a += 1 -end -``` -
    -
    - -### Lamda -```ruby -def my_while(cond, &body) - while cond.call - body.call - end -end - -a = 0 -my_while -> { a < 3 } do - puts a - a += 1 -end -``` -
    -
    - ----- -### Lista de parámetros a un bloque -* Los argumentos a un bloque podrán ser: - * Argumentos splat. - * Inicializados con un valor por defecto. - * Bloques como parámetro (usando `&`). ----- -### Lista de parámetros a un bloque -```ruby -proc1 = lambda do |a, *b, &block| - puts "a = #{a.inspect}" - puts "b = #{b.inspect}" - block.call -end -proc1.call(1, 2, 3, 4) { puts "in block1" } - -proc2 = -> a, *b, &block do - puts "a = #{a.inspect}" - puts "b = #{b.inspect}" - block.call -end -proc2.call(1, 2, 3, 4) { puts "in block2" } -``` -> Más adelante veremos en detalle cómo funciona el splat. - ----- -### El símbolo usado como bloque - -Para entender por qué funciona: - -```ruby -[1,2,3].inject &:+ -``` - -
    - -Analizando qué es lo que sucede en el siguiente ejemplo -
    - -```ruby -o = Object.new -[1,2,3].inject &o -# TypeError: wrong argument type Object (expected Proc) -``` - ----- -### El símbolo usado como bloque - -Una solución es implementar `to_proc`: - -
    - -
    - -```ruby -class Object - def to_proc - Proc.new {} - end -end -o = Object.new -[1,2,3].inject &o -``` - -
    -
    - -* No falla, pero no hace lo esperado. -* Sólo convertimos a un bloque vacío. -* Un bloque sin acciones no es útil. -* Menos en el contexto de `inject`. -
    -
    ----- -### El símbolo usado como bloque - -
    - -Analizando entonces lo que sucedió inferimos que la clase `Symbol` implementa -`#to_proc` de la siguiente forma: -
    - -
    -
    - -```ruby -class Symbol - def to_proc - lambda { |obj| obj.send(self) } - end -end -``` -
    -
    - -```ruby - -[1,2,3].map &:to_s - -[1,2,3].inject &:+ - - -``` -
    -
    - -**¡¡Probemos!!** -
    - -Funciona **`map`** pero no **`inject`**. _Observemos bien el error._ -
    ----- -### El símbolo usado como bloque - - -
    -Tratamos de solucionar la implementación anterior: -
    - -
    -
    - -```ruby -class Symbol - def to_proc - lambda do |obj, args| - obj.send(self, *args) - end - end -end -``` -
    -
    - -```ruby - -[1,2,3].map &:to_s - - -[1,2,3].inject &:+ - - - -``` -
    -
    - -**¡¡Probemos!!** -
    - -Funciona **`inject`** pero no **`map`**. _Observemos bien el error._ -
    -
    - -> Claro ejemplo de solucionar algo y romper otra cosa. Caso que se controla -> utilizando tests de unidad. -
    ----- -### El símbolo usado como bloque - -La solución a ambos problemas: - -```ruby -class Symbol - def to_proc - lambda { |obj, args=nil| obj.send(self, *args) } - end -end - -[1,2,3].map &:to_s -[1,2,3].inject &:+ -``` diff --git a/src/sections/lenguaje/clases-variables.md b/src/sections/lenguaje/clases-variables.md deleted file mode 100644 index 6689bb1..0000000 --- a/src/sections/lenguaje/clases-variables.md +++ /dev/null @@ -1,122 +0,0 @@ -# Clases y variables - -
    - -* ruby - -
    - ----- - -# Clases - ----- -## Control de acceso - -* Permitir demasiado acceso en las clases incrementará el **acoplamiento** de - la aplicación: _los usuarios de una clase que se expone demasiado podrían confiar en - detalles de implementación en vez de su interfaz lógica._ -* Ruby provee control de acceso a los métodos -* Una regla importante es: **_Nunca exponer métodos que puedan dejar un objeto - en estado inválido_**. - ----- - -## Niveles de protección -* **Públicos:** los métodos públicos pueden invocarse por cualquiera. Los - métodos son públicos por defecto excepto `initialize` que es privado. -* **Protegidos:** pueden invocarse por objetos de la clase que lo define y - subclases. -* **Privados:** no pueden ser invocados con un receptor explícito: - _el receptor es siempre el objeto actual, `self`_. Esto - significa que tampoco puede invocar el método privado de otra instancia de la - misma clase. - ----- -## Aplicando accesos - -```ruby -class MyClass - def method # default is public - end - - protected # subsequent methods will be 'protected' - def method2 - end - - private # subsequent methods will be 'private' - def method3 - end - - public # subsequent methods will be 'public' - def method4 - end -end -``` ----- -## Alternativamente - -```ruby -class MyClass - def method1; end - def method2; end - def method3; end - def method4; end - - public :method1, :method4 - protected :method2 - private :method3 -end -``` - ----- - -# Variables - ----- -## Variables -* Hemos usado variables en varias oportunidades. -* Se usan para no perder valores y poder referenciarlos nuevamente. -* Cada variable es una **referencia** a un objeto. - -> *Is a variable an object?* ***In Ruby, the answer is no.*** *A variable is simply a -> reference to an object. Objects float around in a big pool somewhere (the heap, most of the -> time) and are pointed to by variables.* - ----- - -## Son referencias - -Analicemos el siguiente ejemplo - -```ruby -person1 = "Tim" -person2 = person1 -person1[0] = 'J' -puts "person1 is #{person1}" -puts "person2 is #{person2}" -``` - -### Para evitarlo: `dup` - -```ruby -person1 = "Tim" -person2 = person1.dup -person1[0] = 'J' -puts "person1 is #{person1}" -puts "person2 is #{person2}" -``` ----- - -## Freezando un objeto - -Es posible freezar objetos - -```ruby -person1 = "Tim" -person2 = person1 -person1.freeze -person2[0] = 'J' -``` - - diff --git a/src/sections/lenguaje/colecciones.md b/src/sections/lenguaje/colecciones.md deleted file mode 100644 index 7c72151..0000000 --- a/src/sections/lenguaje/colecciones.md +++ /dev/null @@ -1,284 +0,0 @@ -# Colecciones - -
    - -* ruby - -
    - ----- - -## Introducción -* Las colecciones representan elementos fundamentales de cualquier programa. -* Ruby provee dos clases que representan colecciones: - * `array` - * `hash` _o arreglo asociativo_ -* El correcto uso de estas colecciones es fundamental en la programación Ruby. -* Los bloques, combinados con colecciones se convierten en construcciones muy - poderosas para la iteración. - ----- - -## Array - -
    -
    - -* La clase `Array` mantiene una colección de referencias a objetos. -* Cada referencia a objeto ocupa una posición en el arreglo, identificada por un - índice entero no negativo. - -
    -
    - -```ruby -a = [ 3.14159, "pie", 99 ] -a.class -a.length -a[0] -a[1] -a[2] -a[3] - -b = Array.new -b.class -b.length -b[0] = "second" -b[1] = "array" -``` -
    -
    - ----- - -## Arrays y `[]` - -* Los elementos de un arreglo se acceden con el operador `[]`. -* Pero `[]` es un método (de instancia en la clase `Array`) y por tanto puede - implementarse por cualquier subclase. -* El primer índice de un arreglo es el cero. -* Un arreglo accedido en un índice positivo retorna el objeto referenciado en - esa posición. - * Si no hay objeto, retorna `nil`. -* Un arreglo accedido en un índice negativo, retorna el objeto contando desde el - final. - ----- -## Uso de índices - -
    -
    - -### Negativos - -```ruby -a = [ 1, 7, 9] -a[-1] -a[-2] -a[-99] - - -``` - -
    -
    - -### Pares -```ruby -a = [ 1, 3, 5, 7, 9 ] -a[1, 3] -a[3, 1] -a[-3, 2] - - -``` - -> El significado es `[desde,cantidad]` - -
    -
    - -### Rangos - -```ruby -a = [ 1, 3, 5, 7, 9] -a[1..3] -a[1...3] -a[3..3] -a[-3..-1] -``` -> Significa **desde** y **hasta**. -> Si se utiliza `..` se incluye el fin de rango, con -> `...` se **excluye** el extremo final. -
    -
    - ----- -## El método `[]=` - - -Setea elementos de un array. - -```ruby -a = [ 1, 3, 5, 7, 9 ] -a[1] = 'bat' -a[-3] = 'cat' -a[3] = [ 9, 8 ] -a[6] = 99 -``` - -> Si se utiliza un único índice, reemplaza su valor por lo que esté -> a la derecha de la asignación: _cualquier gap que haya quedado luego de `[]=` -> se completa con nil._ - ----- -## El método `[]=` -* Utilizando dos valores o un rango, el comportamiento depende de lo que - esté a la derecha de la asignación: - * Si la cantidad a reemplazar es cero, entonces **inserta el valor** - en la posición inicial: **_no se eliminan elementos_**. - * Si el valor a la **derecha es un arreglo**, sus elementos se utilizan en el - reemplazo: _el tamaño del arreglo es actualizado si la cantidad de - elementos a la derecha difiere de la cantidad a reemplazar._ - ----- -## Mejor un ejemplo - - -```ruby -a = [ 1, 3, 5, 7, 9 ] -a[2, 2] = 'cat' -a[2, 0] = 'dog' -a[1, 1] = [ 9, 8, 7 ] -a[0..3] = [] -a[5..6] = 99, 98 -``` - ----- -## push y pop - - -```ruby -stack = [] -stack.push "red" -stack.push "green" -stack.push "blue" - -puts stack.pop -puts stack.pop -puts stack.pop -``` - ----- -## shift y unshift - -```ruby -stack = [] -(stack.unshift 1).unshift 2 -stack.unshift 3 - -puts stack.shift -puts stack.shift -puts stack.shift -``` - ----- -## first y last - -```ruby -array = [ 1, 2, 3, 4, 5, 6, 7 ] -p array.first(4) -p array.last(4) -``` - ----- -## Hashes - -* Los arreglos se indexan con enteros, los hashes con objetos: _Símbolos, strings, expresiones regulares, etc_. -* Cuando se almacena un valor en un hash, utilizamos: - * El índice, generalmente llamado *key* - * El dato a almacenar en dicho índice, generalmente llamado *valor* -* El acceso a los valores referenciados por un hash se realiza por medio de los - *keys*. - ----- - -### Ejemplo - -```ruby -h = { 'dog' => 'canine', 'cat' => 'feline' } -h.length # => 2 -h['dog'] # => "canine" -h['cow'] = 'bovine' -h[12] = 'dodecine' -h['cat'] = 99 -``` - ----- -### Cambio de notación - -```ruby -# En ruby >= 1.9 -h = { dog: 'canine', cat: 'feline' } - -# En ruby < 1.9 -h = { :dog => 'canine', :cat => 'feline' } -``` ----- - -### Un programa usando colecciones - - -Calcular el número de veces que aparece una palabra en un texto - -> El problema se divide en dos partes: -> * Separar el texto en palabras: *suena como un array* -> * Luego contar cada palabra diferente: *suena como hash* - ----- - -### El método que obtiene las palabras - -Usando expresiones regulares y el método `scan` todo parece muy simple: - -```ruby -def words_from_string(string) - string.downcase.scan(/[\w']+/) -end -``` - -> Analizar otros ejeplos de scan. Por ejemplo probar: -> -> `"0123456789".scan /.{2}/` ----- -### El método que cuenta las palabras - -Con un hash indexaremos para cada palabra, la cantidad de ocurrencias. - -```ruby -if counts.has_key?(next_word) - counts[next_word] += 1 -else - counts[next_word] = 1 -end -``` - ----- - -## Refactorizamos - -```ruby -def count_frequency(word_list) - counts = Hash.new(0) - for word in word_list - counts[word] += 1 - end - counts -end -``` - -> `Hash.new` puede recibir como parámetro el valor usado para incializar cada -> valor del Hash. [Ver ejemplo](https://github.com/ttps-ruby/ttps-ruby.github.io/tree/master/ejemplos/words-frequency). -> Es importante destacar que el ejemplo incluye tests para analizar cómo -> desarrollar utilzando TDD. - diff --git a/src/sections/lenguaje/conceptos-avanzados.md b/src/sections/lenguaje/conceptos-avanzados.md deleted file mode 100644 index 601ff72..0000000 --- a/src/sections/lenguaje/conceptos-avanzados.md +++ /dev/null @@ -1,730 +0,0 @@ -# Conceptos avanzados - -
    - -* ruby - -
    - ----- -# Tipos estándar - -
    - -* ruby - * conceptos avanzados - -
    ----- -## Números - -* Pueden ser enteros, punto flotante, racionales, complejos. -* **Antes de ruby 2.4**, los enteros se manejaban internamente como: - * Se representan con `Fixnum` en el rango de `(-2^30..2^30-1 o -2^62..2^62-1)`. - * Fuera del rango anterior, Ruby utiliza Bignum en forma transparente. -* **A partir de ruby 2.4** se usa `Integer`. -* Los strings no se convierten automáticamente a enteros: `'1' + '2' => '12'`. - ----- -## ¿Cómo interactúan? - -```ruby -1 + 2 # => 3 -1 + 2.0 # => 3.0 -1.0 + 2 # => 3.0 -1.0 + Complex(1,2) # => (2.0,2i) -1 + Rational(2,3) # => (5/3) -1.0 + Rational(2,3) # => 1.66666666666665 - -# Y cuando se divide: - -1.0/2 # => 0.5 -1/2.0 # => 0.5 -1/2 # => 0 -``` - -
    - -**Probar la división requiriendo `mathn`**. A partir de ruby 2.5 debe instalrse -como gema: `gem install cmath mathn` - -
    - ----- - -## Strings y el encoding -* A partir de ruby 1.9, cada string tiene asociada una codificación. -* Por defecto, la codificación asociada a un literal string dependerá de la - codificación del archivo fuente donde se especificó: - * Si no se especifica la codificación se asume: `US-ASCII` en - 1.9 y `UTF-8` a partir de ruby 2. - ----- - -## Strings y el encoding - -Cambiamos la codificación de un fuente agregando en la primer línea un - comentario **`#encoding: xxxx`**. - -```ruby -#encoding: iso-8859-1 -txt = "dog" -puts "Encoding of #{txt.inspect} is #{txt.encoding}" -``` - ----- -# Rangos - -
    - -* ruby - * conceptos avanzados - -
    ----- -## Rangos como condiciones -Otro uso rangos en condiciones permite al objeto rango mantener el estado de -las comparaciones que macheen desde un valor (el inicial del rango) hasta el -final (del rango). - -```ruby -100.times {|x| p x if x==50 .. x==55 } - -while line = gets - puts line if line =~ /start/ .. line =~ /end/ -end -``` - ----- - -## Rangos como intervalos -```ruby -car_age = gets.to_f # let's assume it's 5.2 -case car_age - when 0...1 - puts "Mmm.. new car smell" - when 1...3 - puts "Nice and new" - when 3...6 - puts "Reliable but slightly dinged" - when 6...10 - puts "Can be a struggle" - when 10...30 - puts "Clunker" - else - puts "Vintage gem" -end -``` - ----- - -## Buscando el problema... - -```ruby -car_age = gets.to_f # let's assume it's 5.2 -case car_age - when 0..0 - puts "Mmm.. new car smell" - when 1..2 - puts "Nice and new" - when 3..5 - puts "Reliable but slightly dinged" - when 6..9 - puts "Can be a struggle" - when 10..29 - puts "Clunker" - else - puts "Vintage gem" -end - -``` ----- -# Métodos - -
    - -* ruby - * conceptos avanzados - -
    - ----- -## Definiendo un método -* Los nombres de los métodos deben empezar con minúscula o underescore -* *No es error que el nombre comience con mayúsucla, pero debería recibir - argumentos. Por convención, los métodos que comienzan con mayúscula se - utilizan para conversiones de tipos*: - * `def String; 'string'; end;` - * `String() vs String` ----- -## Los métodos - -* Cuando retornamos un boolean, es prolijo que el método termine con `?` -* Aquellos métodos *peligrosos* deben terminar con `!` -* Los métodos que aparecen a la izquierda de una asignación terminan con `=` - ----- - -## Argumentos - -* Los parámtros a un método se escriben como una lista de variables entre - paréntesis: - * Los paréntesis pueden omitirse. - * Por convención se usarán paréntesis cuando el método tenga argumentos, y - omitirlos cuando no. ----- - -## Argumentos -* Es posible definir valores por defecto para los argumentos. -* Incluso usando como valor un parámetro anterior. - -
    - -```ruby -def concat(a="a", b="b") - "#{a},#{b}" -end - -def surround(word, pad_width=word.length/2) -"[" * pad_width + word + "]" * pad_width -end -``` -
    - ----- -## Argumentos variables -* Usando **`*`** antes del nombre del argumento y luego de los parámetros normales. - * A partir de Ruby 1.9, es posible definir el argumento variable en cualquier - posición. Lo importante es no tener más de uno -* A esta técnica se la suele llamar: *splatting an argument* - -```ruby -def varargs(arg1, *rest) - "arg1=#{arg1}. rest=#{rest.inspect}" -end -``` - ----- -## Usos de splat -* Se utiliza splat en una subclase para pasar parámetros a la - superclase usando `super`. -* **`super`** sin argumentos invoca el método del padre con todos los argumentos recibidos. - -
    - -
    - -```ruby -class Child < Parent - def do_something(*not_used) - # our processing - super - end -end -``` -
    -
    - -```ruby -class Child < Parent - def do_something(*) - # our processing - super - end -end -``` -
    -
    - ----- -## Retornando valores -* Los métodos siempre retornan un valor aunque el mismo no sea utilizado. -* Podemos usar `return` para forzar la salida. -* Si se envían varios parámetros a `return` se retorna un arreglo. -* El caso anterior se puede usar en asignaciones en paralelo. - ----- -## Arreglo como argumentos -Es la idea inversa a la explicación de splat previa - - -```ruby -def five(a, b, c, d, e) - "I was passed #{a} #{b} #{c} #{d} #{e}" -end - -five(1, 2, 3, 4, 5 ) -five(1, 2, 3, *['a', 'b']) -five(*['a', 'b'], 1, 2, 3) -five(*(10..14)) -five(*[1,2], 3, *(4..5)) -``` - ----- -## Bloques más dinámicos -Al igual que en el caso anterior de splat, podemos necesitar especificar que -uno de los parámetros a un método es un bloque - -```ruby -## En vez de -(1..10).collect { |x| x*2}.join(',') - -## Podemos usar -b = -> x { x*2} -(1..10).collect(&b).join ',' -``` - ----- - -## Argumentos como Hash -* Hasta Ruby 1.9 no existía la posibilidad de usar *keyword arguments*. -* En vez de especificar los parámetros en el orden en que se definieron, es posible - especificar qué valor tomará cada parámetro indicando el hecho con el nombre - del argumento y su valor. -* Hasta que Ruby 1.9 se utilizaba Hash en su reemplazo para obtener el mismo - resultado. - ----- - -## Argumentos como Hash - -```ruby -class SongList - def search(name, params) - # ... - end -end -list.search(:titles, - { :genre => "jazz", - :duration_less_than => 270 - }) -``` - -
    - -El primer parámetro indica qué atributo retornar mientras que el segundo es -un hash con el criterio de búsqueda. -
    - ----- - -## Argumentos como Hash -* Lo incómodo del ejemplo es la necesidad de usar `{}`, además de la posible - confusión con la posibilidad de que se esté indicando un bloque -* **Una solución:** usar **`clave => valor`** en la lista de - argumentos siempre que: - * Sea luego de los argumentos *normales*. - * Antes de un splat y bloque. - * Ya no es necesario usar llaves. - ----- - -## Argumentos como Hash -```ruby -# Ruby <= 1.9 -list.search(:titles, - :genre => 'jazz', - :duration_less_than => 270) - -# Ruby >= 1.9 -list.search(:titles, genre: 'jazz', duration_less_than: 270) -``` - ----- -## Keyword arguments - -_Solo en Ruby 2.0 o superior_. - -Asumimos un supuesto método **`log`** - -
    - -
    - -Keyword arguments - -```ruby -def log(msg, level: "ERROR", time: Time.now) - puts "#{ time.ctime } [#{ level }] #{ msg }" -end - - - -``` - -
    -
    - -Usando hash - -```ruby -def log(msg, opt = {}) - level = opt[:level] || "ERROR" - time = opt[:time] || Time.now - puts "#{ time.ctime } [#{ level }] #{ msg }" -end -``` - -
    -
    - -```ruby -log("Hello!", level: "INFO") -``` - ----- - -## Keyword arguments -* Las cosas parecen simples de reproducir con hashes, pero todo se complica un poco si sucede que: - * Queremos usar keyword arguments con splat. - * Lanzar excepciones cuando un argumento no es conocido. - ----- - -## Keyword arguments - -Simular keyword arguments con hash: - -```ruby -def log(*msgs) - opt = msgs.last.is_a?(Hash) ? msgs.pop : {} - level = opt.key?(:level) ? opt.delete(:level) : "ERROR" - time = opt.key?(:time ) ? opt.delete(:time ) : Time.now - raise "unknown keyword: #{ opt.keys.first }" if !opt.empty? - msgs.each {|msg| puts "#{ time.ctime } [#{ level }] #{ msg }" } -end -``` - -
    - -*Pero nos gustó preservar la primer versión del ejemplo* -
    - ----- - -## Keyword arguments - -Probamos los argumentos - -```ruby -log("Hello") -log("Hello!", level: "ERROR", time: Time.now) -``` -
    - -Y si cambiamos el orden - -```ruby -log("Hello!", time: Time.now, level: "ERROR") -``` -
    -
    - -Cuando enviamos un argumento no conocido - -```ruby -log("Hello!", date: Time.new) -``` -
    - ----- - -## Keyword arguments - -Si queremos evitar las excepciones podemos usar `**` para explícitamente -agrupar el resto de los keyword arguments en un hash (como splat). - -
    - -```ruby -def log(msg, level: "ERROR", time: Time.now, **kwrest) - puts "#{ time.ctime } [#{ level }] #{ msg }" -end - -log("Hello!", date: Time.now) -``` -
    ----- - -## Keyword arguments - -Una función que considera todos los casos: - -```ruby -def f(a, b, c, m = 1, n = 1, *rest, x, y, z, k: 1, **kwrest, &blk) - puts "a: %p" % a - puts "b: %p" % b - puts "c: %p" % c - puts "m: %p" % m - puts "n: %p" % n - puts "rest: [%p]" % rest.join(',') - puts "x: %p" % x - puts "y: %p" % y - puts "z: %p" % z - puts "k: %p" % k - puts "kwrest: %p" % kwrest - puts "blk: %p" % blk -end - -f("a", "b", "c", 2, 3, "foo", "bar", "baz", "x", - "y", "z", k: 42, u: "unknown") { } -``` ----- -# Operadores - -
    - -* ruby - * conceptos avanzados - -
    ----- -## Operadores -* Ya hemos usado los operadores **`+`**, **`-`**, **`*`**, **`/`**, etc -* Estos operadores se implementan como llamadas a métodos - -```ruby -a, b, c = 1, 2, 3 -a * b + c -# O en forma similar -(a.*(b)).+(c) -``` - ----- -## Redefinir operadores - -```ruby -class Integer - alias old_plus + - def +(other) - old_plus(other).succ - end -end -``` - ----- -## El operador `<<` - -
    - -
    - -```ruby -class ScoreKeeper - def initialize - @total_score = 0 - @count = 0 - end - - def <<(score) - @total_score += score - @count += 1 - self - end - - def average - fail "No scores" if @count == 0 - Float(@total_score) / @count - end -end -``` -
    -
    - -```ruby -scores = ScoreKeeper.new -scores << 10 << 20 << 40 -puts "Average = #{scores.average}" -``` -
    -
    - ----- -## El operador `[]` - -```ruby -class SomeClass - def []=(*params) - value = params.pop - puts "Indexed with #{params.join(', ')}" - puts "value = #{value.inspect}" - end -end - -s = SomeClass.new -s[1] = 2 -s['cat', 'dog'] = 'enemies' -``` - ----- -# Expresiones - -
    - -* ruby - * conceptos avanzados - -
    - ----- -## Ejecutar comandos - -Podemos usar comillas: **\`** ó **`%x`** para indicar la ejecución de un comando -en el sistema operativo subyacente: - -```ruby -`date` -`ls /bin`.split[34] -%x{echo "Hello there"} -`ip address ls`. - split("\n"). - select {|x| x =~ / inet / }. - map do |x| - x.scan(/((\d{1,3}\.?){4}\/(\d){1,2})/).flatten.shift - end -``` ----- -## Asignaciones - -Jugando con splat y asignación en paralelo - -```ruby -a, b, c, d, e = *(1..2), 3, *[4, 5] # a=1, b=2, c=3, d=4, e=5 - -a1, *b1 = 1, 2, 3 # a1=1, b1=[2, 3] - -a2, *b2 = 1 # a2=1, b2=[] - -*a3, b3 = 1, 2, 3, 4 # a3=[1, 2, 3], b3=4 - -c, *d, e = 1, 2, 3, 4 # c=1, d=[2,3], e=4 - -f, *g, h, i, j = 1, 2, 3, 4 # f=1, g=[], h=2, i=3, j=4 -``` - ----- -## and - -El operador **`&&`** y el método **`and`** funcionan similar: _retornan el -primer valor si es falso, sino el segundo_. - - -```ruby -nil && 99 # => nil -false && 99 # => false -"cat" && 99 # => 99 -a = (true and false) -a = true and false # Check a, Why?? -``` - -
    - -Ambos son iguales salvo por la precedencia: _**`and` es de menor precedencia -que `&&`**_. -
    ----- -## or -El operador **`||`** y el método **`or`** funcionan similar: _retornan el -primer valor si es verdadero, sino el segundo_. - -```ruby -nil || 99 # => 99 -false || 99 # => 99 -"cat" || 99 # => "cat" -b = (false or true) -b = false or true # Check b, Why?? -``` - -
    - -_**`or` es de menor precedencia -que `||`**_. -
    -
    - -Es muy común utilizar la expresión: `||=` para setear un valor si no fue -seteado: - -```ruby -var ||= "default value" -``` -
    - ----- -## Break, Redo y Next - -* Podemos alterar el flujo de ejecución de loops - * **`break`:** termina en forma inmediata al loop que se encuentra más próximo. El - control se devuelve a la sentencia siguiente al final del bloque - * **`redo`:** repite la iteración actual sin evaluar la condición ni trayendo el - siguiente elemento si fuese un iterador - * **`next`:** avanza hasta el final del bloque continuando con la siguiente - iteración - ----- -## break - -```ruby -a = 0 -while a < 20 do - a +=1 - break if a == 10 - p a -end -``` - ----- -## redo - -
    -
    - -```ruby -a = 0 -while a < 20 do - a +=1 - redo if a == 10 - p a -end -``` -
    -
    - -```ruby -a = 0 -while a < 20 do - a +=1 - redo if a == 20 - p a -end -``` -
    -
    - ----- -## next - -
    -
    - -```ruby -a = 0 -while a < 20 do - a +=1 - next if a == 10 - p a -end -``` -
    -
    - -```ruby -a = 0 -while a < 20 do - a +=1 - next if a == 20 - p a -end -``` -
    -
    diff --git a/src/sections/lenguaje/excepciones.md b/src/sections/lenguaje/excepciones.md deleted file mode 100644 index 3fc05e7..0000000 --- a/src/sections/lenguaje/excepciones.md +++ /dev/null @@ -1,322 +0,0 @@ -# Excepciones - -
    - -* ruby - -
    - ----- -## Introducción - -* Las excepciones permiten empaquetar en un objeto información sobre un error. -* El objeto `Exception` se propagará hacia arriba en la pila de ejecución hasta - que el sistema detecte código que sepa manejar dicha excepción. - ----- -## La clase Exception - -* Ruby define una jerarquía de excepciones que son subclase de `Exception`. -* Al lanzar una excepción, es posible hacerlo con cualquiera de las subclases de -`Exception` o con una clase propia. -* Toda excepción tiene asociado un mensaje y una traza de ejecución. - * Si definimos excepciones propias, podemos agregar información específica - ----- -## Manejo de excepciones - -Analizamos el siguiente código - -```ruby -require 'open-uri' - -web_page = URI.open("https://www.ruby-lang.org/en/documentation/") -output = File.open("ruby.html", "w") -while line = web_page.gets - output.puts line -end -output.close -``` - -* ¿Qué sucede si ocurre un error en la mitad de la transferencia? -* No queremos guardar una página por la mitad en el archivo de salida - ----- -## Manejo de excepciones - -Agregamos el manejador de excepción - -```ruby -require 'open-uri' - -page = "unlp" -file_name = "#{page}.html" -output = File.open(file_name, "w") -begin - web_page = URI.open("https://www.ruby-lang.org/en/#{page}") - while line = web_page.gets - output.puts line - end - output.close -rescue Exception - STDERR.puts "Failed to download #{page}: #{$!}" - output.close - File.delete(file_name) - raise -end -``` - ----- -## Manejo de excepciones - -* Cuando sucede una excepción se ubica una referencia al objeto con la excepción - asociada en la variable global **`$!`**. -* Luego de cerrar y eliminar el archivo, se invoca a `raise` sin parámetros, que - relanza la excepción en **`$!`**. - - ----- - -## Jerarquía de Exception - -
    - -
    - -```ruby -Exception - StandardError - ArgumentError - FiberError (1.9) - IndexError - KeyError (1.9) - StopIteration (1.9) - IOError - EOFError - LocalJumpError - NameError - NoMethodError -``` -
    -
    - -```ruby -Exception - StandardError - RangeError - FloatDomainError - RegexpError - RuntimeError - SystemCallError - (Errno::xxx) - ThreadError - TypeError - ZeroDivisionError - fatal -``` - -
    -
    - -```ruby -Exception - NoMemoryError - ScriptError - LoadError - NotImplementedError - SyntaxError - SecurityError - SignalException - Interrupt - SystemExit - SystemStackError - - -``` -
    -
    - ----- -## Múltiples rescue - -
    - -* Es posible utilizar varios `rescue` para un bloque. -* Cada `rescue` puede indicar varias excepciones a catchear. -* Al final de cada `rescue`, podemos indicar el nombre de la variable que - usaremos para mapear la exepción (en vez de usar `$!`) - - -```ruby -def my_eval(string) - begin - eval string - rescue SyntaxError, NameError => boom - print "String doesn't compile: " + boom.message - rescue StandardError => bang - print "Error running script: " + bang.message - end -end -my_eval 'Float 2,2' -my_eval 'undefined_method' -``` -
    ----- -## Cómo funciona rescue -* La decisión de qué `rescue` utilizar, es similar al caso de un `case`. -* Cada `rescue` compara la excepción lanzada con cada uno de los parámetros - nombrados: - * La comparación es: `parámetro == $!` - * Esto significaría que si el tipo de la excepción lanzada coincide con el del - parámetro. ----- -## Cómo funciona rescue -* Si se omiten parámetros, se compara con `StandardError`. -* Si no machea con ningún parámetro, sale del bloque `begin/end` buscando en el - método que invocó un manejador para la misma, y así siguiendo hacia arriba en - la pila. -* Casi siempre usaremos nombre de clases como parámetros a `rescue`, pero - podemos usar expresiones que retornen una subclase de `Exception`. - ----- -## Asegurando la ejecución -* Varias veces necesitamos ejecutar determinado código al finalizar un método de - forma segura, es decir independientemente de si se produce un error en la - mitad: - * Por ejemplo, tenemos un archivo abierto, que necesitamos cerrar antes - de finalizar el bloque. -* El código bajo `ensure` se ejecutará siempre, haya sido una ejecución exitosa - o con algún problema. - ----- -## Un ejemplo ensure - -```ruby -f = File.open("testfile") -begin - # .. process -rescue - # .. handle error -ensure - f.close -end -``` - ----- -## El else de rescue - -* El `else` aplica cuando ninguno de los `rescue` manejan la excepción. -* Tener cuidado porque `ensure` ejecutará siempre, incluso cuando no se produce - un error. - -```ruby -f = File.open("testfile") -begin - # .. process -rescue - # .. handle error -else - puts "Congratulations-- no errors!" -ensure - f.close -end -``` - ----- -## Volver a empezar... - -* A veces podemos corregir una causa de excepción. -* Para estos casos, podemos usar `retry` para volver a ejecutar el bloque - `begin/end`. -* Es muy factible caer en loops infinitos. - ----- -## Ejemplo retry - -```ruby -@esmtp = true -begin -# First try an extended login. If it fails -# because the server doesn't support it, -# fall back to a normal login -if @esmtp then - @command.ehlo(helodom) -else - @command.helo(helodom) -end -rescue ProtocolError - if @esmtp then - @esmtp = false - retry - else - raise - end -end -``` - ----- -## Lanzando excepciones - -Podemos lanzar excepciones usando el método `Kernel.raise` - -```ruby -raise -raise "bad mp3 encoding" -raise InterfaceException, "Keyboard failure", caller -``` - -
    - -* La primer forma **relanza una excepción** si la hubiere, o **`RuntimeError`** si no. - Usualemnte dentro de `rescue` para el primer caso. -* El segundo ejemplo, lanza **`RuntimeError`** con el mensaje indicado. -* El tercer ejemplo, utiliza el primer parámetro para crear un excepción con el - segundo parámetro usado como mensaje y la pila de ejecución en el tercer - parámetro. **`Kernel.caller`** genera la traza de ejecución. - -
    ----- -## Ejemplo de raise - -```ruby -raise -raise "Missing name" if name.nil? -if i >= names.size - raise IndexError, "#{i} >= size (#{names.size})" -end -raise ArgumentError, "Name too big", caller -``` - -*Generalmente no se incluye la traza en librerías* - ----- -## catch y throw - -* Veremos un ejemplo que aclarará el concepto - * El siguiente código leerá palabras que irá agregando en un arreglo que al - finalizar imprimirá en orden inverso. Sin embargo, si alguna línea es - incorrecta deberá salir sin hacer nada. - * El secreto es `throw(symbol, variable)`. - -> En el siguiente ejemplo es importante que el último **puts** retorna `nil` - ----- -## Ejemplo de catch y throw - -```ruby -def only_words(filename) - word_list = File.open(filename) - word_in_error = catch(:done) do - result = [] - while line = word_list.gets - word = line.chomp - throw(:done, word) unless word =~ /^\w+$/ - result << word - end - puts result.reverse - end - if word_in_error - puts "Failed: '#{word_in_error}' found. Not a word" - end -end -``` diff --git a/src/sections/lenguaje/modulos.md b/src/sections/lenguaje/modulos.md deleted file mode 100644 index a240e58..0000000 --- a/src/sections/lenguaje/modulos.md +++ /dev/null @@ -1,700 +0,0 @@ -# Módulos - -
    - -* ruby - -
    ----- -## Introducción - -* Uno de los principios aceptados sobre buen diseño es la eliminación de - duplicados innecesarios. -* Trataremos de lograr que cada concepto en nuestra aplicación sea expresado sólo - una vez en el código. - ----- -## Herencia -* Permite crear clases que son un refinamiento o especialización de otra clase. -* A esta clase se la llama *subclase* de la original. -* A la clase original se la llama *superclase* de la subclase. -* También se utilizan los términos: clase padre y clase hija. -* El mecanismo de herencia es simple: - * Se heredan las capacidades del padre. - * Los métodos de instancia y clase del padre estarán disponibles en los - hijos. - ----- - -## Ejemplo de herencia - -
    -
    - -```ruby -class Parent - def say_hello - puts "Hello from #{self}" - end -end -``` -
    -
    - -```ruby - - -p = Parent.new -p.say_hello - - -``` -
    -
    -
    -
    - -```ruby -class Child < Parent -end -``` -
    -
    - -```ruby -c = Child.new -c.say_hello -``` -
    -
    - ----- -## Conociendo la herencia - -El método `superclass` devuelve la clase padre - -```ruby -puts "The superclass of Child is #{Child.superclass}" -puts "The superclass of Parent is #{Parent.superclass}" -puts "The superclass of Object is #{Object.superclass}" -``` - ->* Si no se define superclase, Ruby asume `Object` -> * `to_s` está definido aquí ->* `BasicObject` es utilizado en metaprogramación. -> * Su padre es `nil` -> * Es la raíz: todas las clases lo tendran como ancestro - ----- -## Ejemplo - -
    - -* `GServer` es un servidor TCP/IP genérico. -* Agregaremos funcionalidad básica a nuestro servicio subclaseando GServer. - * El servicio mostrará las últimas lineas del archivo de logs del sistema: - `/var/log/syslog` -* GServer manipula todo lo relacionado a sockets TCP. - * Sólo indicaremos el puerto en la inicialización. - * Cuando un cliente se conecte, el objeto GServer invocará al método `serve`. - * GServer no hace nada en el método que implementa `serve`. -
    - ----- -## LogServer - -```ruby -require 'gserver' -class LogServer < GServer - - def initialize - super(12345) - end - - def serve(client) - log "Connected from #{remote_ip[2]}:#{remote_ip[1]}" - client.puts get_end_of_log_file - end - - private - def get_end_of_log_file - File.open("/var/log/syslog") do |log| - # back up 1000 characters from end - log.seek(-1000, IO::SEEK_END) - # ignore partial line - log.gets - # and return rest - log.read - end - end -end - -server = LogServer.new -server.start.join -``` - -> GServer debe instalarse como una librería externa. [Ver -> ejemplo](https://github.com/ttps-ruby/ttps-ruby.github.io/tree/master/ejemplos/gserver) ----- -## ¿Cómo hemos usado la herencia? - -* `LogServer` hereda de `GServer`. -* Esto indica que: - * LogServer es un GServer, compartiendo toda su funcionalidad. - * LogServer es una especialización. ----- -## ¿Cómo usamos la herencia? - -
    -
    - -### `initialize` - -* Se fuerza el puerto a 12345. -* El puerto es un parámetro del constructor de GServer. -* Para invocar el método constructor del padre, utilizamos `super`. -
    -
    - -### `serve` -* El padre asume que será subclaseado invocando un método que será - implementado por sus hijos. -* Esto permite a la clase padre implementar lo más pesado del procesamiento y - delegar a los hijos mediante callbacks funcionalidad extra. -
    -
    - -> * Veremos más adelante que esta práctica ***muy común en OO*** no la convierte en ***un buen diseño*** -> * En su lugar veremos ***mixins*** -> * Pero para explicar mixins, antes tenemos que explicar ***módulos*** - ----- -## Modulos -* Los módulos son una forma de agrupar métodos, clases y constantes. -* Proveen dos beneficios: - * Proveen **namespaces** y previenen el solapamiento de nombres. - * Son la clave de los **mixins**. - ----- -## Namespaces -* A medida que los programas crecen, surge código reusable. -* Es así como aparecen las librerías. -* Deseamos agrupar en archivos diferentes estas rutinas de forma tal - de poder reusarlas en programas distintos. -* Generalmente estas rutinas pertenecerán a una clase, o grupos de clases - interrelacionadas, que podríamos disponer en un único archivo. - * Sin embargo, a veces queremos agrupar cosas que no necesariamente forman una - clase. - ----- -## Namespaces -* Como una primer idea, podríamos pensar en disponer todos los archivos que - componen nuestra librería y luego cargar el archivo en nuestro programa cuando - lo necesite. -* Esta idea tiene un problema si definimos funciones con nombres que son iguales - a los de otra librería. - ----- - -## Ejemplo - -
    -
    - -```ruby -module Trig - PI = 3.141592654 - - - def self.sin(x) - # .. - end - - def self.cos(x) - # .. - end -end -``` -
    -
    - -```ruby -module Moral - VERY_BAD = 0 - BAD = 1 - - def self.sin(badness) - # ... - end - -end - - - - -``` -
    -
    - ----- -## ¿Como se usa? - -```ruby -y = Trig.sin(Trig::PI/4) -wrongdoing = Moral.sin(Moral::VERY_BAD) -``` - -> * Así como en los métodos de clase, se invocan los métodos de un módulo -> precediéndolos con el nombre del módulo y un punto. -> * Las constantes se referencian con el nombre del módulo y doble dos puntos (::). - ----- -## Mixins -* En el ejemplo reciente, definimos métodos del módulo que prefijábamos con el - nombre del módulo: `self.cos`. -* La primer asociación es que los métodos de un módulo son como métodos de - clase. -* La siguiente pregunta sería: *Si los métodos del módulo son como métodos de - clase, qué serían los métodos de instancia de un módulo?*. ----- -## Mixins -* Un módulo **no puede tener instancias** porque no es una clase. -* Podremos **incluir** un módulo a una definición de clase. -* Cuando esto sucede, los métodos de instancia definidos en el módulo son - incluidos como métodos de instancia de la clase. Se **mezclan** (mixed in). -* En efecto, los módulos mixins se comportan como superclases. - ----- -## Ejemplo -```ruby - -module Debug - def who_am_i? - "#{self.class.name}(\##{self.object_id}):#{self.to_s}" - end -end - -class Phonograph - include Debug - def initialize(n); @n=n; end - def to_s; @n; end -end - -class EightTrack - include Debug - def initialize(n); @n=n; end - def to_s; @n; end -end - -ph = Phonograph.new("West End Blues") -et = EightTrack.new("Surrealistic Pillow") -ph.who_am_i? -et.who_am_i? -``` - ----- -## El uso de include -* El `include` en Ruby agrega una referencia al módulo que agregará nuevos - métodos a nuestra clase. -* Si varias clases incluyen el mismo módulo, todas tendran referencias al mismo. -* Si modificamos el módulo durante la ejecución del programa, todas las clases - que incluían el módulo tomarán los cambios automáticamente. - ----- -## El potencial -* El potencial real de los mixins se obtiene cuando el código de un mixin - interactúa con código de una clase que lo utiliza. -* Analizamos el caso de un mixin que es parte de la librería estándar de Ruby, - `Comparable`: - * Agrega los operadores de comparación: `<`, `<=`, `==`, `>=`, `>`. - * Agrega el método `between?`. - * Asume que la clase que utilice este mixin, implementará el método `<=>`. - ----- -## Probamos con `Person` - -
    -
    - -```ruby -class Person - include Comparable - attr_reader :name - def initialize(name) - @name = name - end - def to_s - "#{@name}" - end - def <=>(other) - self.name <=> other.name - end -end -``` -
    -
    - -```ruby -p1 = Person.new("Matz") -p2 = Person.new("Guido") -p3 = Person.new("Larry") -[p1, p2, p3].sort -``` -
    -
    - ----- -## Iteradores y `Enumerable` -* Si queremos que nuestra clase entienda los iteradores `each`, `include?`, - `find_all?`, `map`, `inject`, `count`, etc. - * Incluimos el módulo `Enumerable`. - * Implementamos el iterador `each`. -* Si además los elementos de nuestra colección implementan `<=>` entonces - dispondremos de: - * `min` - * `max` - * `sort` ----- -## Composición de módulos - -Creamos nuestra clase Enumerable - -
    -
    - -```ruby -class VowelFinder - include Enumerable - def initialize(string) - @string = string - end - def each - @string.scan(/[aeiou]/i) do |vowel| - yield vowel - end - end -end -vf = VowelFinder.new "El murcielago tiene todas" -vf.inject(:+) -``` -
    -
    - -> Ahora nuestra clase funciona igual que otras colecciones: - -```ruby -[ 1, 2, 3, 4, 5 ].inject(:+) -( 'a'..'m').inject(:+) -``` -
    -
    - ----- -## Creamos el módulo Summable - -```ruby -module Summable - def sum - inject(:+) - end -end -``` - -Lo aplicamos a las clases del ejemplo - -```ruby -class Array; include Summable; end -class Range; include Summable; end -class VowelFinder; include Summable; end - -[ 1, 2, 3, 4, 5 ].sum -('a'..'m').sum -vf.sum -``` - ----- -## Variables en mixins - -
    -
    - -```ruby -module Observable - - def observers - @observer_list ||= [] - end - - def add_observer(obj) - observers << obj - end - - def notify_observers - observers.each {|o| o.update } - end -end -``` -
    -
    - -> * En ruby las variables de instancia se crean cuando se nombran por -> primera vez. -> * Esto significa que un Mixin podrá crear variables de instancia si las nombra -> por primera vez en la clase. - -
    -
    - ----- -## Variables en mixins -* Sin embargo, este uso es **riesgoso**. -* Los nombres de las variables pueden colisionar con otro nombre de la clase u - otros módulos. -* Un programa que caiga en este escenario dará resultados erróneos y - difíciles de rastrear. - ----- -### Solución -* La mayoría de las veces, los modulos Mixins no usan variables de instancia, - sino accessors. -* En caso de necesitarlo, utilizar nombres que se prefijen con el nombre del - módulo por ejemplo. - ----- -## Resolución de nombres - -*¿Cómo se resuelve el nombre de un método que es el mismo en la clase, que -es implementado en la superclase y además definido en uno o varios módulos -incluidos?* - ----- -## Resolución de nombres - -* Primero se busca si la clase del objeto lo implementa. -* Luego en los mixins incluidos por la clase. *Si tiene varios módulos, el - último será el considerado*. -* Luego en la superclase. - ----- -
    -
    - -### Caso 1 - -```ruby -module MyModule - def test - "Module" - end -end - -class Parent - def test - "Parent" - end -end - -class Child < Parent - include MyModule - def test - "Child" - end -end - -t = Child.new -p t.test -``` - -#### Child -
    -
    - -### Caso 2 - -```ruby -module MyModule - def test - "Module" - end -end - -class Parent - def test - "Parent" - end -end - -class Child < Parent - include MyModule -end - -t = Child.new -p t.test -``` - -#### Module -
    -
    - -### Caso 3 - -```ruby -module MyModule - def test1 - "Module" - end -end - -class Parent - def test - "Parent" - end -end - -class Child < Parent - include MyModule -end - -t = Child.new -p t.test -``` - -#### Parent -
    -
    - ----- -## Invocación de métodos - -Si analizamos la salida de `#ancestors` veremos la cadena Clases por la -que se buscará por un método apropiado. Veamos el siguiente ejemplo: - -
    -
    - -```ruby -module Logging - def log(level, message) - puts "#{level}: #{message}" - end -end - -class Service - include Logging -end - -Service.ancestors -``` - -
    -
    - -> La salida es: -> -> `[Service, Logging, Object, Kernel, BasicObject]` -> -> Notar que Logging se interpone entre Object y Service - -
    -
    - ----- -## Ancestros y módulos - -Si agregamos otro Modulo a la clase anterior: - -```ruby -Service.include Comparable -``` - -Podemos verificar que el último módulo incluido aparece detrás de la clase -`Service`, explicando así las precedencias explicadas como casos anteriormente. - -```ruby -[Service, Comparable, Logging, Object, Kernel, BasicObject] -``` - ----- -## extend - -Utilizar `#extend` en una clase importará los métodos del módulo como métodos de -clase. - -En vez de actualizar la lista de ancestros, `#extend` modificará el singleton de -la clase extendida, agregando métodos de clase. - -En general, se utilizará `#include` en una clase para extender el comportamiento -con métodos de instancia, pero a su vez podría necesitarse usar `#extend` para -extender los métodos de clase. Entonces se necesitarían **dos modulos diferentes -para cada caso.** - ----- -## extend - -La siguiente estrategia permite crear dos módulos para extender clases y objetos -en un mismo código: - -```ruby -module Logging - module ClassMethods - def logging_enabled? - true - end - end - - def self.included(base) - base.extend(ClassMethods) - end - - def log(level, message) - puts "#{level}: #{message}" - end -end -``` ----- -## extend vía include - -Usando el ejemplo anterior, al realizar: - -```ruby - -String.include Logging - -String.logging_enabled? - -'Test'.log 'ERROR', 'test message' - -``` ----- - -## Herencia, Mixins y Diseño -Herencia y Mixins ambos permiten escribir código en un único lugar. - -**¿Cuándo usar cada uno?** ----- -## Herencia, Mixins y Diseño - -* El uso de herencia debe aplicarse cuando se cumple la propiedade **es un**. -* La herencia puede asociarse con la creación de clases, que sería como -agregar nuevos tipos al lenguaje. -* Al usar herencia **deberíamos en todo momento poder reemplazar un objeto de - la superclase por un objeto de la subclase**. *Los hijos deben - hacer honor a los contratos asumidos por el padre*. - ----- -## Herencia, Mixins y Diseño - -* Muchas veces se utiliza **mal** en situaciones que representan - una relación de *posee un* o *utiliza un*. -* El mundo se crea a partir de **composiciones** más que de restricciones de - herencia estrictas. - -> Una persona no es un DatabaseWrapper. Una Persona **usa** un DatabaseWrapper -> para persistirla. ----- -## Herencia, Mixins y Diseño - -* La herencia representa un gran acomplamiento entre dos componentes. - * Cambiar la herencia sería algo complejo en cualquier programa mediano. -* **Debemos utilizar composición cada vez que encontramos una relación:** A - *usa* B o A *tiene un* B diff --git a/src/sections/lenguaje/objetos.md b/src/sections/lenguaje/objetos.md deleted file mode 100644 index b4f6030..0000000 --- a/src/sections/lenguaje/objetos.md +++ /dev/null @@ -1,359 +0,0 @@ -# Objetos y atributos - -
    - -* ruby - -
    - ----- -## Aprendemos con un ejemplo - -* Sistema que realiza control de stock de libros. -* Utilizando un lector de código de barra se lee de cada libro información que - luego se descargará como CSV -* Ejemplo del CSV: - -```csv -"Date","ISBN","Amount" -"2008-04-12","978-1-9343561-0-4",39.45 -"2008-04-13","978-1-9343561-6-6",45.67 -"2008-04-14","978-1-9343560-7-4",36.95 -``` - ----- -## ¿Qué debe hacer el sistema? - -* Leer varios archivos CSV y determinar cuántos ejemplares de cada - título disponemos -* Determinar además el monto total en libros que tenemos - ----- -## Creamos la clase BookInStock - - -```ruby -class BookInStock -end -``` -> Recordamos que los nombres de las clases deben comenzar con mayúsculas, los -métodos con minúscula - -
    - -### Lo probamos - -```ruby -a_book = BookInStock.new -another_book = BookInStock.new -``` -
    - ----- -## Observaciones - -* Se crean dos objetos diferentes de la clase `BookInStock`. -* Podríamos decir en esta primer instancia que son el mismo libro, o iguales porque **nada los -distingue**. -* Lo solucionamos obligando que la inicialización indique aquellos datos que distinga al -libro. - ----- - -## Variables de instancia - -```ruby -class BookInStock - def initialize(isbn, price) - @isbn = isbn - @price = Float(price) - end -end -``` - -* El método `initialize` es especial en Ruby -* Cuando se invoca el método `new`, Ruby aloca memoria para alojar un objeto no - inicializado y luego invoca al método `initialize` **pasándole cada parámetro - que fue enviado a `new`**. -* Entonces `initialize` nos permite configurar el estado inicial de nuestros objetos. - ----- -## En el método initialize - -* Se utilizan variables de instancia: comienzan con **@**. -* Las variables `@isbn` e `isbn` son diferentes. -* Se realiza una pequeña validación implícita: - * El método [`Float`](http://www.ruby-doc.org/core-2.0.0/Kernel.html#method-i-Float) - toma un argumento y lo convierte a `float`, terminando el programa si falla - la conversión ----- - -## Usamos los nuevos objetos - -```ruby -b1 = BookInStock.new("isbn1", 3) -p b1 -b2 = BookInStock.new("isbn2", 3.14) -p b2 -b3 = BookInStock.new("isbn3", "5.67") -p b3 -``` - -> Usamos el método `p` porque imprime el estado interno de los objetos. -> Si se utilizara `puts` entonces se invocaría `to_s` e imprimiría: -> `#` - ----- - -## Implementamos to_s - -```ruby -class BookInStock - def to_s - "ISBN: #{@isbn}, price: #{@price}" - end -end -``` - -> Probar nuevamente `puts b3` ----- -## Objetos y sus atributos - -* Un objeto como el mostrado anteriormente no permite que nadie acceda a sus - variables. -* Si bien es algo positivo encapsular, si no permitimos acceder a los datos que - mantienen el estado del objeto, el mismo se vuelve inútil. -* A las *ventanas* de acceso a los objetos las denominaremos **atributos**. -* Modificaremos nuestra clase de `BookInStock` con el fin de agregar atributos - para `isbn` y `price` así podemos contabilizarlos. - ----- -## Getters - -```ruby -class BookInStock - def isbn - @isbn - end - - def price - @price - end -end -``` - ----- -## Atributos de lectura - -A los atributos anteriores se los denomina **accesor** porque mapean -directamente con las variables de instancia. Ruby provee un shortcut: **`attr_reader`**. - -```ruby -class BookInStock - attr_reader :isbn, :price - def initialize(isbn, price) - @isbn = isbn - @price = Float(price) - end -end -``` - -> * Notar que se utilizan **símbolos**. -> * `attr_reader` **no define variables de instancia**, sólo los métodos de acceso. - ----- -## Atributos de escritura - -No sólo leemos atributos: a veces necesitamos modificar un valor. Ésto es -posible definiendo un método terminado con **el signo igual**. - -```ruby -class BookInStock - attr_reader :isbn, :price - - def initialize(isbn, price) - @isbn = isbn - @price = Float(price) - end - - def price=(new_price) - @price = new_price - end -end -``` - ----- -## Atributos de escritura - -```ruby -book = BookInStock.new("isbn1", 33.80) -book.price = book.price * 0.75 # discount price -puts "New price = #{book.price}" -``` - -
    - -
    - -Podemos usar entonces: -* **`attr_writer`:** acceso W. -* **`attr_accessor`:** acceso RW. - -
    -
    - - -```ruby -class BookInStock - - attr_reader :isbn - attr_accessor :price - - def initialize(isbn, price) - @isbn = isbn - @price = Float(price) - end -end -``` - -
    -
    ----- -## Atributos virtuales - -Agregamos el precio en centavos - -
    
-class BookInStock
-  attr_reader :isbn
-  attr_accessor :price
-  def initialize(isbn, price)
-    @isbn = isbn
-    @price = Float(price)
-  end
-
-  def price_in_cents
-    Integer(price*100 + 0.5)
-  end
-
-  def price_in_cents=(cents)
-    @price = cents / 100.0
-  end
-end
-
    - ----- -## El lector de CSV -Ya tenemos el objeto que representa un libro. Resta implementar: -* Leer varios archivos CSV -* Totalizar ejemplares iguales -* Totalizar el precio de los libros en stock - ----- -## CsvReader - -Pensamos la estructura de `CsvReader` -```ruby -class CsvReader - def initialize - end - - def read_in_csv_data(csv_file_name) - end - - def total_value_in_stock - end - - def number_of_each_isbn - end -end -``` ----- -## Uso de CsvReader - -```ruby -reader = CsvReader.new -reader.read_in_csv_data("file1.csv") -reader.read_in_csv_data("file2.csv") -# Otros csv -puts "Total value in stock = #{reader.total_value_in_stock}" -``` - -* Notamos que `CsvReader` debe ir acumulando lo que va leyendo de cada csv. -* Para ello mantendremos un arreglo de valores como variable de instancia. -* Para leer un CSV, Ruby provee de una librería que simplificará el trabajo. - ----- - -## CsvReader - -```ruby -require 'csv' - -class CsvReader - - def initialize - @books_in_stock = [] - end - - def read_in_csv_data(csv_file_name) - CSV.foreach(csv_file_name, headers: true) do |row| - @books_in_stock << - BookInStock.new(row["ISBN"], row["Amount"]) - end - end -end -``` -> Utilizamos la librería `csv` que nos permite acceder a los campos de cada -> columna por su nombre. - ----- -## Cálculo del precio total - -```ruby -class CsvReader - - def total_value_in_stock - sum = 0.0 - @books_in_stock.each do |book| - sum += book.price - end - sum - end - -end -``` - -> Ya veremos una implementación **más rubista** que la utilizada en esta -> instancia. - ----- - -## Organizando el código - -* Dividimos el código en tres archivos - * **`lib/book_in_stock.rb`:** la clase `BookInStock` - * **`lib/csv_reader.rb`:** el código de `CsvReader` - * **`stock_stats.rb`:** el programa principal -* Aparecerán dependencias entre ellos - * Para cargar dependencias externas se utiliza: **`require`** y **`require_relative`** - ----- - -### stock_stats.rb - -```ruby -require_relative 'csv_reader' - -reader = CsvReader.new -ARGV.each do |csv_file_name| - STDERR.puts "Processing #{csv_file_name}" - reader.read_in_csv_data(csv_file_name) -end - -puts "Total value = #{reader.total_value_in_stock}" -``` - -[Descargar el -ejemplo](https://github.com/ttps-ruby/ttps-ruby.github.io/tree/master/ejemplos/stock-stats) - diff --git a/src/sections/presentacion.md b/src/sections/presentacion.md deleted file mode 100644 index a5ce576..0000000 --- a/src/sections/presentacion.md +++ /dev/null @@ -1,157 +0,0 @@ -# Presentación ----- -## La cátedra - -| Profesor | Contacto | -| ---- | --- | -| Lic. Christian A. Rodríguez | [![car@info.unlp.edu.ar](static/mail.svg)](mailto:car@info.unlp.edu.ar "car@info.unlp.edu.ar") [![twitter](static/twitter.svg)](https://twitter.com/car_unlp "twitter") [![github](static/github.svg)](https://github.com/chrodriguez "github") | - -| Jefe de Trabajos Prácticos | Contacto | -| ---- | --- | -| Lic. Nahuel Cuesta Luengo | [![ncuesta@cespi.unlp.edu.ar](static/mail.svg)](mailto:ncuesta@cespi.unlp.edu.ar "ncuesta@cespi.unlp.edu.ar") [![twitter](static/twitter.svg)](https://twitter.com/ncuestal "twitter") [![github](static/github.svg)](https://github.com/ncuesta "github") | - -| Ayudantes | Contacto | -| ---- | --- | -| Emilia Corrons | [![maemco4@gmail.com](static/mail.svg)](mailto:maemco4@gmail.com "maemco4@gmail.com") | -| Damián Candia | [![dcandia@cespi.unlp.edu.ar](static/mail.svg)](mailto:dcandia@cespi.unlp.edu.ar "dcandia@cespi.unlp.edu.ar") | - ----- -## Horarios de cursada - -| Día | Hora | Aula | -| --- | --- | --- | -| Lunes (teoría) | 18 a 20 | 14 | -| Jueves (práctica) | 10 a 12 | 1 | - ----- - -## Programa - -Dividimos el programa en secciones: - -* **Introducción** -* **El lenguaje** -* **Gemas** -* **Active Record** -* **Rails** -* **12 Factor Apps** ----- - -## Programa - -* **Introducción** - * Se realiza un recorrido rápido acerca de la historia del - lenguaje. - * Con ejemplos, mostramos el potencial del lenguaje. - * Presentamos las diferentes implementaciones de ruby y su instalación. -* **El lenguaje** -* **Gemas** -* **Active Record** -* **Rails** -* **12 Factor Apps** ----- - -## Programa - -* **Introducción** -* **El lenguaje**: profundizamos sobre el lenguaje: - * Objetos y atributos - * Clases y variables - * Colecciones - * Bloques e iteradores - * Módulos - * Excepciones - * Conceptos avanzados -* **Gemas** -* **Active Record** -* **Rails** -* **12 Factor Apps** ----- - -## Programa - -* **Introducción** -* **El lenguaje** -* **Gemas:** a las librerias que extienden Ruby se las llaman Gemas. En esta sección -abordaremos: - * Manejo de dependencias - * Bundler -* **Active Record** -* **Rails** -* **12 Factor Apps** - ----- - -## Programa - -* **Introducción** -* **El lenguaje** -* **Gemas** -* **Active Record:** aprendemos a conectar con bases de datos: - * Introducción - * CRUD - * Migraciones - * Validaciones - * Asociaciones -* **Rails** -* **12 Factor Apps** ----- - -## Programa - -* **Introducción** -* **El lenguaje** -* **Gemas** -* **Active Record** -* **Rails:** el framework más utilizado por los desarrolladores Ruby. En esta sección -aprenderemos a trabajar con este framework: - * Conceptos básicos - * Ruteo - * ActiveRecord - * Unit Testing - * MVC -* **12 Factor Apps** ----- -## Modalidad de cursada - -* **Aprobación de la cursada:** - * Una **evaluación o entrega** (estamos definiendo el mejor criterio - de evaluación) para cada tema. En caso de no - aprobar algún tema, se podrá reiterar la evaluación de aquellos temas no - aprobados. - * **Trabajo práctico final integrador** -* La nota final de la materia será un **seis aprobando la cursada**. Será - posible mejorar la nota con una extensión del trabajo práctico integrador o - propuesta de trabajo conjunta con el profesor. ----- -## Videos años anteriores - -Durante la pandemia, generamos material correspondiente a este curso. Las clases -pueden verse en los siguientes playlists de youtube: - -* [Teorías 2020](https://www.youtube.com/playlist?list=PLbzlLgd17gcHfBQWOvT5V10VAPONlv6Mf) -* [Teorías 2021](https://youtube.com/playlist?list=PLbzlLgd17gcGwfnl2CZunboh1s7wzeNGq) - ----- -## Bibliografía / Recursos -A medida que se presenten los temas se indicarán las fuentes apropiadas - -Los fuentes de éste material pueden encontrarse en -https://github.com/ttps-ruby/ttps-ruby.github.io - - - - -Todo el material se encuentra bajo licencia **Creative Commons** - -TTPS - Opcion Ruby por -Christian A. Rodriguez se encuentra bajo -una Licencia Creative Commons Atribución-NoComercial-CompartirIgual 3.0 Unported. -
    - -Licencia Creative Commons - -
    Icons made by Pixel perfect from www.flaticon.com
    - -     - diff --git a/src/sections/rails.md b/src/sections/rails.md deleted file mode 100644 index 3c51d10..0000000 --- a/src/sections/rails.md +++ /dev/null @@ -1,42 +0,0 @@ - - -
    - -* introducción -* un proyecto rails -* gemas -* configuraciones -* ruteo -* mvc -* ejemplo -* scaffolding -* resolviendo problemas -
    ---- -FILE: rails/introduccion.md ---- -FILE: rails/proyecto.md ---- -FILE: rails/gemas.md ---- -FILE: rails/configuraciones.md ---- -FILE: rails/ruteo.md ---- -FILE: rails/mvc.md ---- -FILE: rails/ejemplo.md ---- -FILE: rails/scaffolding.md ---- -FILE: rails/problemas.md ---- - -## Referencias - -* [Learn Ruby on Rails](http://learn-rails.com/learn-ruby-on-rails.html) -* [Rails Guides](http://guides.rubyonrails.org/) -* [Rails Documentation](http://api.rubyonrails.org/) -* [Rails Beginner Cheat Sheet](http://pragtob.github.io/rails-beginner-cheatsheet/index.html) -* [Railscasts](http://railscasts.com/) -* [Uso de concerns: como poner a dieta los modelos regordetes](http://37signals.com/svn/posts/3372-put-chubby-models-on-a-diet-with-concerns) diff --git a/src/sections/rails/configuraciones.md b/src/sections/rails/configuraciones.md deleted file mode 100644 index 3e6bc80..0000000 --- a/src/sections/rails/configuraciones.md +++ /dev/null @@ -1,144 +0,0 @@ -# configuraciones - -
    - -* rails - -
    ----- - -## Configuraciones - -* Rails es conocido por su lema: **convention over configuration** - * Al aplicarlo, se reducen muchas configuraciones. - * No todas las configuraciones pueden eliminarse. - * Las aplicaciones requieren credenciales o API keys para poder funcionar. -* El versionado con **git** debe evitar el guardado de estas credenciales. ----- - -## Configuraciones -
    - -* Una buena práctica es usar variables de entorno dado que: - * La soportan todos los SO, PaaS como Heroku y otras - plataformas de deployment como Swarm y Kubernetes. - * Obviamente que las variables de ambiente pueden accederse desde ruby. - * Mantienen la privacidad del proyecto de forma independiente. - * La gema **[figaro](https://github.com/laserlemon/figaro)** permite setear - variables desde el shell o desde un archivo de configuración - * La gema **[dotenv-rails](https://github.com/bkeepers/dotenv)** permite setear - variables desde un archivo `.env` en `ENV` -* A partir de rails 5.2 aparecen [Rails - credentials](https://edgeguides.rubyonrails.org/security.html#custom-credentials) -
    ----- -## Cómo usar env vars - -* Las variables de entorno se usan mediante la constante **ENV**. -* Supongamos que se necesita configurar en alguna parte de nuestra aplicación, - un servidor de mail: - -
    - -```ruby -config.action_mailer.smtp_settings = { - address: "smtp.gmail.com", - port: 587, - domain: ENV["DOMAIN_NAME"], - authentication: "plain", - enable_starttls_auto: true, - user_name: ENV["GMAIL_USERNAME"], - password: ENV["GMAIL_PASSWORD"] -} -``` - -
    - -_¿De qué forma seteamos los valores **`DOMAIN_NAME`**, **`GMAIL_USERNAME`** y - **`GMAIL_PASSWORD`**?_ -
    -
    - ----- - -## Cómo usar figaro - -Agregamos al `Gemfile` - -```ruby -gem "figaro", git: "https://github.com/laserlemon/figaro" -``` - -Instalamos la gema con bundler - -```bash -bundle install -``` - -> No han actualizado la gema en rubygems - ----- - -## Cómo usar figaro - -* Esta gema setea las variables de entorno antes de hacer cualquier otra cosa. -* Los valores se leen desde un archivo: **`config/application.yml`**. -* Al instalar figaro, se crea el archivo **`config/application.yml`** y - modificará **`.gitignore`** para ignorar esta configuración. -* La gema entra en acción cuando se ejecute: **`bundle exec figaro install`**. - ----- - -## Cómo usar figaro - -Completamos la instalación con: - -```bash -bundle exec figaro install -``` - -Editamos `config/application.yml` - -```yaml -GMAIL_USERNAME: mygmailusername -GMAIL_PASSWORD: mygmailpassword -development: - GMAIL_USERNAME: otherusername - GMAIL_PASSWORD: otherpassword -``` - -> Probar con `rails console [-e production]`, imprimiendo -> `ENV['GMAIL_USERNAME']` - ----- - -## Rails credentials - -* A partir de rails 5.2, al crear una aplicación rails se crea **`config/credentials.yml.enc`**. -* Las credenciales en este archivo se editan usando **`rails - credentials:edit`**: - * Este comando generará si no existe una _**clave maestra**_. - * Con este comando podremos editar `credentials.yml.enc` y versionarlo de - forma segura. - * Nunca debemos versionar la clave maestra. ----- - -## Ejemplo credentials - -
    - -* Si usamos **`rails credentials:edit`** manejamos una configuración con todos - los parámetros de cada ambiente en forma jerárquica. -* Si usamos **`rails credentials:edit --environment development`** tendremos un - par de archivos por ambiente: - * **`config/credentials/development.yml.enc`** - * **`config/credentials/development.key`** - -**Usamos desde rails las credenciales de la siguiente forma:** - -```ruby -Rails.application.credentials[:some_key] # Only specific value -Rails.application.credentials.config # all configured values -``` - -
    diff --git a/src/sections/rails/ejemplo.md b/src/sections/rails/ejemplo.md deleted file mode 100644 index dcf33a4..0000000 --- a/src/sections/rails/ejemplo.md +++ /dev/null @@ -1,292 +0,0 @@ -# ejemplo - -
    - -* rails - -
    ----- -## Home dinámica - -_Planificamos nuestro trabajo definiendo un User story que llamaremos **Birthday countdown**_ - -* As a visitor to the website - * I want to see the owner's name - * I want to see the owner's birthdate - * I want to see how many days until the - * owner's next birthday - * In order to send birthday greetings - ----- -## La elección de nombres - -
    - -* Mucho en el arte de la programación radica en elegir nombres correctos para - nuestras creaciones. -* Necesitamos un modelo que represente el site owner. - * Elegiremos el nombre más obvio: **`Owner`** y creamos el archivo **`app/models/owner.rb`**. -* Para el controlador consideramos el **User Story** y por ello tomamos el - nombre **`VisitorsController`** considerando que **visitor** es el actor. - * Creamos entonces **`app/controllers/visitors_controller.rb`**. -
    ----- - - -## Convenciones de nombres - - -* En rails es **importante** el nombre de los archivos y clases definidas en - ellos. -* Esto se debe al principio **CoC** evitando configuraciones innecesarias. ----- - - -## Convenciones de nombres - -**Modelos en singular usando camelcase:** - -```ruby -class Visitor < ActiveRecord::Base -``` - -**Controladores en plurar y camelcase:** - -```ruby -class VisitorsController < ApplicationController -``` -> Terminan en **`Controller`** ----- - - -## Convenciones de nombres - -* Los archivos de modelo coinciden con el nombre del modelo pero en - minúscula: **`app/models/visitor.rb`**. -* Los archivos de controlador coinciden con la clase: **`app/controllers/visitors_controller.rb`**. -* La **_carpeta de las vistas_** coinciden con el nombre del controlador - pero sin el sufijo controller: **`app/views/visitors`**. - -> Siempre se utiliza snake case ----- -## Ruteo - -Crearemos primero el ruteo antes de implementar el modelo y controlador. Editamos -entonces **`config/routes.rb`** - -```ruby -Rails.application.routes.draw do - root to: 'visitors#new' -end -``` - -> La sintaxis de este archivo puede verse a partir del documento: [Routing from outside in](http://guides.rubyonrails.org/routing.html). -> -> Modificando **`config/routes.rb`** no requiere reiniciar. - ----- -## Primer prueba - -Acceder a [http://localhost](http://localhost:3000) - -
    - -Esperamos obtener un error indicando: - -**uninitialized constant VisitorsController** - -Lo cual es lógico considerando que no hemos implementado dicha clase. - -
    ----- -## El modelo - -* La mayoría de los modelos rails obtienen datos desde una base de datos. -* Cuando se utiliza una base de datos, es posible usar el comando: **`rails - generate model`** para crear un modelo que hereda de **`ActiveRecord`**. -* Para este ejemplo no necesitamos una base de datos: _nuestra clase simplemente - definirá los métodos necesarios_. - ----- - -## El Modelo - -
    - -```ruby -class Owner - def name - 'Foobar Kadigan' - end - - def birthdate - Date.new(1990, 12, 22) - end - - def countdown - today = Date.today - birthday = Date.new(today.year, - birthdate.month, - birthdate.day) - if birthday > today - countdown = (birthday - today).to_i - else - countdown = (birthday.next_year - today).to_i - end - end - -end -``` - -
    - ----- -## La Vista - -* Como ya mencionamos en las convenciones de nombres, las vistas se guardan en - **`app/views/`**. -* En una aplicación convencional, un controlador puede renderizar múltiples - vistas, por lo tanto se crea un directorio para cada controlador. - -**Creamos el directorio** - -```bash -mkdir app/views/visitors -``` - ----- - -## La Vista - -**Creamos `app/views/visitors/new.html.erb`** - -```html -

    Home

    -

    Welcome to the home of <%= @owner.name %>.

    -

    I was born on <%= @owner.birthdate %>.

    -

    Only <%= @owner.countdown %> days until my birthday!

    -``` - - ----- - -## La Vista -* Tenemos únicamente la vista **new** para el controlador **visitors**. -* La extensión es **`erb`** porque usamos el motor ERB para armar nuestros - templates. -* En la vista, podemos ver que el markup de ERB utiliza los tags **`<%=`** y - **`%>`** - ----- - -## La Vista - -Por defecto en rails se utiliza ERB, pero es posible utilizar gemas que -proveen alternativas como por ejemplo [Slim](http://slim-lang.com/). -Si usáramos **slim** la vista sería **`new.html.slim`**. - -``` -h3 Home in slim - -p Welcome to the home of #{@owner.name} - -p I was born on #{@owner.birthdate}. - -p Only #{@owner.countdown} days until my birthday! -``` - -> Debe incluirse la gema `slim-rails` y éste ser el único template dador que por -> defecto tiene prioridad erb. - - ----- - - -## La Vista -El acceso a los datos del modelo **Owner** se hace a través de **`@owner`** - -**Podríamos preguntarnos por qué usar:** - -
    - -```erb -<%= @owner.countdown %> -``` -
    - -en vez de - -
    - -```erb -<%= (Date.new(today.year, @owner.birthdate.month, @owner.birthdate.day) - Date.today).to_i %> -``` -
    - -> Podríamos hacerlo, pero violaríamos SoC - ----- - -## El controlador - -* Será el *pegamento* entre el modelo Owner y la vista **`VisitorsController#new`**. -* Cuando hagamos referencia a una acción en un controlador, usaremos la - notación **VisitorsController#new** uniendo el nombre de la clase del - controlador con el de la acción (que es un método). En este contexto, el - caracter **#** es una convención usada en la documentación. -* El nombre de la clase será **`VisitorsController`** pero el nombre del archivo - **`visitors_controller.rb`** - - ----- - -## El controlador - - -**Creamos `app/controllers/visitors_controller.rb`** - - -```ruby -class VisitorsController < ApplicationController - def new - @owner = Owner.new - end -end -``` - ----- - - -## El controlador - -**¿Qué hace?** - -* Al ser subclase de **`ApplicationController`** hereda todo el comportamiento - definido por la API de rails. -* Solo implementa el método **`new`** -* Creamos una variable de instancia **`@owner`** dado que en la vista - correspondiente estará disponible. - ----- -## El controlador y la vista - -
    - -* Ya creamos una vista llamada **`app/views/visitors/new.html.erb`**. -* El controlador es muy simple dado que el comportamiento oculto que invoca la - vista **`new`** es heredado de la API de rails. - * Podemos hacer explícita esta relación - -**Indicando qué vista usar en el controlador** - -
    - -```ruby -class VisitorsController < ApplicationController - def new - @owner = Owner.new - render 'visitors/new' - end -end -``` - diff --git a/src/sections/rails/gemas.md b/src/sections/rails/gemas.md deleted file mode 100644 index b899eb5..0000000 --- a/src/sections/rails/gemas.md +++ /dev/null @@ -1,125 +0,0 @@ -# gemas - -
    - -* rails - -
    ----- - - -## Las Gemas de Rails -* Rails en sí es una gema que requiere un conjunto de otras gemas: - * Esto puede verse en [Rubygems](https://rubygems.org/gems/rails) -* Las gemas que depende rails son varias. A continuación las analizamos. ----- - -## Las Gemas de Rails -
    - -* **[actioncable](https://github.com/rails/rails/tree/master/actioncable):** - integra websockets con rails. -* **[actionmailbox](https://github.com/rails/rails/tree/master/actionmailbox):** - ruteo de mail entrante del estilo de controlador para su procesamiento en - rails. -* **[actionmailer](https://github.com/rails/rails/tree/master/actionmailer):** - delivery de mails y testing. -* **[actionpack](https://github.com/rails/rails/tree/master/actionpack):** - responsable del manejo de requerimientos y respuestas HTTP. Se encarga del - ruteo mapeando URLs en acciones mediante controladores. Las respuestas se - generan a partir de vistas. _Corresponde al V y C del paradigma MVC_. -* **[actiontext](https://github.com/rails/rails/tree/master/actiontext):** - manejo de texto enriquecido y su edición en rails. -* **[actionview](https://github.com/rails/rails/tree/master/actionview):** - responsable del templating de vistas y su renderización.Integra helpers que - asisten en la construcción de respuetas. -* **[activejob](https://github.com/rails/rails/tree/master/activejob):** - manejo de tareas asíncronas agnóstico del backend de manejo de colas. -* **[activemodel](https://github.com/rails/rails/tree/master/activemodel):** - provee módulos con funcionalidades similares a las presentes en AR. De esta - forma, actionpack puede utilizar ActiveModels como objetos AR de forma - indiferente dando independencia del ORM que podría se personalizado. -
    ----- - -## Las Gemas de Rails -
    - -* **[activerecord](https://github.com/rails/rails/tree/master/activerecord):** - framework para la abstracción de la bases de datos. _Un ORM que representa la - M de MVC_. -* **[activestorage](https://github.com/rails/rails/tree/master/activestorage):** - simplifica el upload y gestión de archivos en proveedores de cloud mediante - referencias. Se integra fácilmente con [AWS S3](https://aws.amazon.com/s3/), - [Google Cloud Storage](https://cloud.google.com/storage/docs/), [Microsoft Azure - Storage](https://azure.microsoft.com/en-us/services/storage/), almacenando las - referencias correspondientes en AR. Soporta además un servicio principal y - otros como espejos para ofrecer redundancia. Puede usarse localmente para - deployment locales o desarrollo, pero su foco principal está en storage en la - nube. -* **[activesupport](https://github.com/rails/rails/tree/master/activesupport):** - extensiones a Ruby y clases que proveen mayor funcionalidad. -* **[bundler](http://gembundler.com/):** gestión de dependencias. -* **[railties](https://github.com/rails/rails/tree/master/railties):** se encarga del - [bootstrap de aplicaciones rails](https://guides.rubyonrails.org/initialization.html) - (cuando usamos `rails server`), comandos de consola y generadores. -* **[sprockets-rails](https://github.com/rails/sprockets-rails):** implementa el - assets pipeline basado en [Sprockets](https://github.com/rails/sprockets). - -
    ----- - -## Las Gemas de Rails - -_Estas gemas a su vez tienen dependencias, dando un total de aproximadamente 100 -gemas_. - ----- -## Otras gemas - -
    - -Además de la gema de rails, el comando **`rails new`** agrega otras gemas: - -
    - -
    - -* sqlite3 -* puma -* stimulus-rails -* turbo-rails -* jbuilder -* tzinfo-data - -
    -
    - -* development: - * brakeman - * web-console - * debug -* test: - * capybara - * selenium-webdriver - -
    -
    -
    - ----- -## Gemas externas - -Gemas que podemos utilizar para implementar ciertas funcionalidades de forma más -cómoda: - -* **[simple_form](https://github.com/heartcombo/simple_form):** simplifica el - uso de forms. -* **[ransack](https://github.com/activerecord-hackery/ransack):** busquedas - simples. -* **[kaminari](https://github.com/kaminari/kaminari):** pager de modelos. -* **[lograge](https://github.com/roidrage/lograge):** normaliza los logs. -* **[devise](https://github.com/heartcombo/devise):** solución de autenticación - flexible. -* **[cancancan](https://github.com/CanCanCommunity/cancancan):** librería de - autorización diff --git a/src/sections/rails/introduccion.md b/src/sections/rails/introduccion.md deleted file mode 100644 index 5ff67b8..0000000 --- a/src/sections/rails/introduccion.md +++ /dev/null @@ -1,130 +0,0 @@ -# introducción - -
    - -* rails - -
    ----- -## Cómo funciona la web - -* Contenidos: _HTML, imágenes, CSS, JS_. -* Contenidos estáticos. -* Contenidos dinámicos: - * Porque se conecta a una DB o servicio. - * Para simplificar el armado de la respuesta usando _partials_. ----- -## Qué es rails -* Conjunto de estructuras y convenciones. -* Es una librería o conjunto de gemas. -* Al usar rails, estaremos usando prácticas estándar que simplificarán la - colaboración y el mantenimiento del código. -* Promueve [Separation of Concerns (SoC)](http://en.wikipedia.org/wiki/Separation_of_concerns), - lo cual permite obtener programas modulares y mantenibles. -* El principal patrón de diseño que implementa es MVC. - -
    - -Al igual que con otros frameworks. -
    - ----- -## Stack tecnológico - -
    - -Conjunto de tecnologías o librerías utilizadas para desarrollar una aplicación. - -* Un stack productivo podría ser: - * Linux - * WEB Server: - * Apache / NGINX - * PHP/Python/Ruby - * MariaDB/Postgres -* Para el desarrollo con rails generalmente es: - * Mac/Linux/Windows - * Puma/Unicorn - * SQLite/MariaDB/Postgres - * Ruby -
    ----- -## El stack de rails - -* Un clásico stack de rails será: - * ERB for view templates - * MySQL for databases - * MiniTest for testing -* Una alternativa: - * Haml for view templates - * PostgreSQL for databases - * Rspec for testing - -
    - -Las componentes podrán intercambiarse fácilmente, habiendo múltiples -alternativas. Seguir las tendencias o componentes populares es una buena -elección -
    - ----- -## Ayuda - - -* Google: pero considerar resultados actuales -* [Stack Overflow](http://stackoverflow.com/questions/tagged/ruby-on-rails) -* [Rails Guides](http://guides.rubyonrails.org/) -* [Rails Documentation](http://api.rubyonrails.org/) -* [Rails Begginer Chat Sheet](http://pragtob.github.io/rails-beginner-cheatsheet/index.html) - alguno podría ser útil_. ----- -## Mantenerse actualizado - -* [Ruby on rails weblog](https://weblog.rubyonrails.org/) -* [Ruby Weekly](http://rubyweekly.com/) -* [Ruby Flow](http://www.rubyflow.com/) -* [Changelog Rails](https://changelog.com/topic/rails) -* [Go Rails](https://gorails.com/episodes) - ----- -## Instalando rails - - -
    - -
    - -```bash -gem install rails -``` -
    -
    - -```bash -rails -v -``` - -
    -
    -
    - -* Es importante saber que disponemos de mensajes de ayuda para cada comando - rails usando **`--help`**. -* Rails provee el comando `rails new` para crear una aplicación Rails básica -
    - -
    - -```bash -rails new --help -``` -
    - -
    - -> * La ayuda puede parecer extensa pero es importante leer las alternativas -> propuestas. -> * No usaremos ninguna opción en esta primer instancia. -> * Como resultado de la ejecución, se creará un directorio con carpetas y -> archivos en ella. - -
    diff --git a/src/sections/rails/mvc.md b/src/sections/rails/mvc.md deleted file mode 100644 index 3665cf3..0000000 --- a/src/sections/rails/mvc.md +++ /dev/null @@ -1,92 +0,0 @@ -# mvc - -
    - -* rails - -
    ----- -## MVC en la web - -El siguiente gráfico muestra qué sucede en el servidor durante el ciclo -request-response - -![ciclo request response](static/rails-ciclo-completo.png) - -> Hay quienes opinan que la arquitectura de la web no se ajusta al original -> diseño de MVC creado para aplicaciones visuales de escritorio - - ----- - - -## MVC en rails - -![MVC en rails](static/rails-mvc.png) - ----- - -## MVC en rails - -
    - -* **En la base del stack está el navegador:** el requerimiento fluye subiendo por - las capas hasta llegar al **router** que despachará al controlador apropiado. -* Existe un único **`config/routes.rb`** y múltiples controladores, modelos y vistas. -* El **controlador**, al recibir el flujo, obtendrá datos de algún **modelo**. -* Con los datos listos, el controlador renderizará la respuesta _combinando_ los - datos del modelo con una componente de **vista** que provea **_layout_** y - **_markup_**. -* _Los archivos del model, controller y view serán código ruby_. -* Cada archivo tendrá una **estructura** y **sintaxis** específica basada en cómo se ha - definido por el mismo framework. -* Cada model, view y controller que creemos **heradará** comportamiento de - superclases que son parte del farmework, minimizando lo que debemos codificar. -
    ----- -## Modelos en Rails - -* Generalmente son objetos de AR. -* En la mayor parte de las aplicaciones rails, un modelo obtiene datos de una - base de datos. -* Sin embargo, en otros casos se obtienen de conexiones a otros servicios. -* Ejemplos: - * El model **User** podría obtener el nombre y email desde una base de datos - local. - * El mismo modelo, podría además obtener los tweets recientes de Twitter para - este mismo usuario, o la ciudad en la que vive desde Facebook. ----- -## Controladores en Rails - -
    - -* Un controlador podría obtener datos de más de un modelo si fuera necesario. -* Generalmente un controlador posee más de una **acción**. - * Por ejemplo, un controlador para **`User`** podría tener acciones para - listar los usuarios, agregar o eliminar un usuario de la lista. -* El archivo **`config/routes.rb`** macheará el requerimiento web a una acción - del controlador. -* En Rails se trata de limitar las acciones en un controlador a las siete - acciones siguientes: **`index`, `show`, `new`, `create`, `edit`, `update` y - `destroy`**. - * Un controlador que implementa estas acciones se dice que es **RESTful**. -
    ----- -## Vistas en Rails - -
    - -* Una vista combina código ruby con markup HTML. -* Generalmente tendremos una vista asociada a cada acción de un controlador: - * Una vista para **index** debería mostrar una lista de usuarios. - * La vista **show** proveerá detalles del perfil de un usuario. -* Las vistas tendrán una sintaxis muy similar a HTML convencional, pero con - algunos datos que se extraen de variables ruby o estructuras de control como - loops que permitirán crear tablas. - * Siguiendo el principio de Separation of Concerns, es considerada una buena - práctica limitar el uso de código ruby en las vistas a sólo utilizarlo para - imprimir valores de variables. - * Cualquier otra cosa será responsabilidad del modelo. -* No todas las acciones tendrán una vista: por ejemplo la acción **destroy** - usualmente redirige al **index**, y **create** redirige o al **show** o al **new**. -
    diff --git a/src/sections/rails/problemas.md b/src/sections/rails/problemas.md deleted file mode 100644 index af18f34..0000000 --- a/src/sections/rails/problemas.md +++ /dev/null @@ -1,104 +0,0 @@ -# resolviendo problemas - -
    - -* rails - -
    ----- -## Introducción - -Veremos algunas técnicas que ayudan a resolver problemas -* Rails console -* Rails logger -* Causando errores - ----- -## Rails console - -* IRB solamente evalúa expresiones que son definidas por la API de ruby -* IRB no conoce las clases de rails -* Rails console carga toda la aplicación rails en una consola IRB - -```bash -bundle exec rails console -``` - -> Notamos que se cargó el ambiente de development - ----- - -## Rails logger -* Las aplicaciones rails envían información de diagnóstico a un **archivo de log**. -* Dependiendo del ambiente en el que corre la aplicación, el log será: - * **`log/development.log`** - * **`log/production.log`** -* En el ambiente de desarrollo, todo log escrito en el archivo es además enviado - a la consola de donde se corre el comando `rails server`. -* Además de los logs por defecto de rails es posible usar el objeto **logger**. - ----- - -## Rails logger - -Para usar este objeto mostramos un ejemplo: - -```ruby -class VisitorsController < ApplicationController - def new - Rails.logger.debug 'DEBUG: entering new method' - @owner = Owner.new - Rails.logger.debug "DEBUG: Owner name is #{@owner.name}" - end -end -``` ----- - -## Rails logger - -
    - -* Podemos usar **`Rails.logger`** en modelos. -* En los controladores, es posible usar el método **`logger`** directamente -* Es posible usar: - * `logger.debug` - * `logger.info` - * `logger.warn` - * `logger.error` - * `logger.fatal` -* Generalmente en el ambiente de **desarrollo _todos los logs se mostrarán_**, - mientras que en **producción _no se visualizarán los logs enviados a - `logger.debug`_**. -
    - ----- - - -## Causando errores - -* Si bien **logger** es muy útil, hay casos en donde el programa abortará ante - una excepción en la que se mostrará el **stack trace**. -* Es común provocar un error para evaluar el contexto de un controlador. - -
    - -**Generamos un error** - -
    
-class VisitorsController < ApplicationController
-  def new
-    @owner = Owner.new
-    DISASTER
-  end
-end
-
    - -> Notar que el manejador en modo desarrollo deja una consola - -
    - ----- - -## Más recursos... - -[RailsGuide: Debugging Rails Applications](http://guides.rubyonrails.org/debugging_rails_applications.html) diff --git a/src/sections/rails/proyecto.md b/src/sections/rails/proyecto.md deleted file mode 100644 index 5f1d035..0000000 --- a/src/sections/rails/proyecto.md +++ /dev/null @@ -1,128 +0,0 @@ -# un proyecto rails - -
    - -* rails - -
    ----- -## Creamos una aplicación - -Asumimos ya instalada la gema de rails, corremos: - -```bash -rails new ttps-ruby -``` - -> El parámetro **ttps-ruby** indica el nombre del proyecto. Puede usarse -> cualquier nombre. - -
    - -El instalador sin opciones ha instalado varias gemas más que vienen con una -aplicación rails por defecto: - -
    - -```bash -cd ttps-ruby && bundle list -``` - -> La instalación por defecto requiere node y yarn para poder integrar [webpacker](https://github.com/rails/webpacker/). - ----- -## Iniciamos el servidor web - -Con los pasos anteriores hemos creado una aplicación simple con valores por -defecto que ya puede usarse: - -```bash -$ bundle exec rails server -``` - -> Es posible que la aplicación no inicie si no se dispone de node/ yarn -> instalados. - -
    - -_Recordar la opción **`--help`** para ver más opciones para el subcomando -server_. -
    - ----- -## Analizamos la aplicación - -* Accedemos a la aplicación usando la URL [http://localhost:3000](http://localhost:3000). -* Observar que al usar el navegador, la consola donde se inició el web server - se actualiza con información. - * Estos mismos mensajes se almacenan en **`log/development.log`**. ----- -## Paramos el servicio - -* El web server puede pararse con **Control+C**. -* No es necesario reiniciar el servidor en caso de modificar el proyecto. - * Así sucede en el ambiente **development**. - * Los casos que requiere reiniciar son: - * Cuando se cambia el **`Gemfile`**. - * Al cambiar archivos de configuración - ----- -## Estructura del proyecto - - -
    - -| Archivo | Descripción | -| ---- | --- | -| **`Gemfile[.loc]`** | Gemas del proyecto y lock | -| **`README.md`** | Documentación en markdown | -| **`app/`** | Carpetas y archivos de la aplicación | -| **`config/`** | Carpetas y archivos de configuración | -| **`db/`** | Carpetas y archivos de la DB | -| **`public/`** | Archivos sin código ruby para ser servidos por un web server | -| **`Rakefile`** | Directivas para rake. Tareas de gestión del proyecto | -| **`bin/`** | Ejecutables del proyecto | -| **`config.ru`** | Configuración para Rack | -| **`lib/`** | Directorio para código ruby variado | -| **`log/`** | Logfiles del proyecto | -| **`tmp/`** | Archivos temporales del proyecto | -| **`vendor/`** | Librerías externas por fuera del Gemfile | - ----- - -## El directorio app/ - -
    - -Si listamos el contenido del directorio, nos encontramos con varias carpetas que -estarán presentes en todo proyecto rails: -
    - -* `assets/` -* `channels/` -* **`controllers/`** -* `helpers/` -* `javascripts/` -* `jobs/` -* `mailers/` -* **`models/`** -* **`views/`** - ----- - -## El directorio app/ - -
    - -* Aquí se hace evidente el patrón **model view controller**. -* La carpeta **`mailers/`** contempla código para el envío de mails. -* La carpeta **`helpers/`** contiene **view helpers**, que son pequeñas porciones de - código reusable que generan HTML. Podríamos definirnos como macros que - expanden un pequeño comando en strings más extensos de tags HTML y contenido. -* La carpeta **`assets/`** contiene estilos CSS y Javascripts que son procesados - por *assets pipeline*, mientras que **`javascripts/`** es utilizada por - **webpacker**. -* La carpeta **`channels/`** contiene código de websockets. -* La carpeta **`jobs/`** contiene tareas asíncronas. - -
    diff --git a/src/sections/rails/ruteo.md b/src/sections/rails/ruteo.md deleted file mode 100644 index 691c6a8..0000000 --- a/src/sections/rails/ruteo.md +++ /dev/null @@ -1,160 +0,0 @@ -# ruteo - -
    - -* rails - -
    ----- -## Páginas estáticas y ruteo -* Una aplicación rails puede servir páginas estáticas como cualquier web server. -* Estas páginas no contienen código ruby: _esto hace que se sirvan de forma más - rápida y usando menos recursos_. -* Empezar por crear páginas estáticas nos ayudará a entender el ruteo en rails. - -
    - -Es importante diferenciar un **application server** de un **web server**. -
    - ----- -## Agregamos la home page - -* Nos aseguramos tener iniciado el server rails: **`bundle exec rails s`** -* Ingresamos a [http://localhost:3000/](http://localhost:3000/) -* Veremos la página de información por defecto de rails. - -Creamos el archivo **`public/index.html`** - -```html -

    Hello World

    -``` - -> Actualizamos la página y...rails observará los cambios de la carpeta -> `public/`. Si no se especifica ningún archivo en la URL, se asume **index.html** - ----- -## Error de ruteo - -¿Qué sucede si accedemos a [/about.html](http://localhost:3000/about.html)? - -![routing error](static/rails-routing-error.png) - - ----- - -## Solucionamos el error - -Agregamos **`public/about.html`**: - -```html - -

    About

    - -``` - -> Si volvemos a probar, ahora todo debería funcionar bien. - - ----- -## Ruteo dinámico - -* El principio de *CoC* gobierna el ruteo en rails. -* Si un navegador solicita **index.html** entonces Rails servirá la página desde - el directorio **`public/`**. - * No se necesita configuración para ello - -
    - -* ¿Si queremos cambiar este comportamiento? - * Haremos que la home page sea ahora el about - * Debemos **_eliminar_** **`public/index.html`** -
    - ----- -## Editamos config/routes.rb - -```ruby -Rails.application.routes.draw do - root to: redirect('/about.html') -end -``` - -> Indicamos que al acceder a la raíz del proyecto redirija a `about.html`. El -> concepto de redirect utiliza mensajes [HTTP 301](https://httpstatuses.com/) - - ----- -## Una reflexión - -* No es obvio el por qué las páginas se sirven de **`public/`**. -* Si se desconoce esta convención, podemos rompernos la cabeza buscando donde se - mapea que http://localhost:3000 sirva **`public/index.html`** -* La razón es que el application server de rails generalmente se utiliza detrás - de un web server por cuestiones de eficiencia. ----- -## Request & response - - -* Debemos considerar que la WEB no es más que navegadores que solicitan páginas - a un servidor. -* Los navegadores realizan **requerimientos** (request). -* Los servidores **responden** (response) a estos requerimientos, enviando, por ejemplo, un - HTML. -* La simplicidad de HTTP hace que no haya más que los requerimientos de un - navegador y las respuestas de un servidor. - ----- -## El ciclo request / response - -![request repsonse](static/rails-request-response.png) - ----- - -## El ciclo desde el navegador - -
    - -* Es aconsejable usar el navegador para observar las peticiones HTTP. -* Antes de investigar algo, es conveniente utilizar el **modo incógnito**: que - se accede usando **Shift+Ctrl+N** (**Shift+Ctrl+P** en Firefox). - * Alternativamente puede limpiarse la caché del navegador para así limpiar - cualquier solicitud previamente cacheada por el navegador. -* Abrimos la vista *Developer Tools* usando **Shift+Ctrl+I**: - * Seleccionamos el tab **Network**. - * Realizamos el requerimiento [http://localhost:3000/about.html](http://localhost:3000/about.html). - * Visualizaremos los archivos recibidos desde el servidor: sólo uno - **about.html**. - -> Notar cuando no es "fresco" el requerimiento - -
    ----- - -## El ciclo desde el navegador - -* Verificar las cabeceras de un requerimiento HTTP 304. -* Específicamente observar el detalle del campo **`If-Modified-Since`**. -* Contrastar con la salida del comando **`TZ=UTC stat public/about.html`**. -* Ejecutar **`touch public/about.html`**. -* Cargar de nuevo la página y verificar el código de retorno. - ----- - -## El ciclo desde el navegador - -* Hasta ahora vimos las herramientas que disponemos desde el navegador -* Pero no podemos visualizar qué es lo que sucede en el servidor - -**Analizamos la consola del servidor:** - -```bash - -Started GET "/" for 127.0.0.1 at ... - -``` - -> Es importante destacar que no hay logs para los archivos servidos desde la -> carpeta **`public/`**. - - diff --git a/src/sections/rails/scaffolding.md b/src/sections/rails/scaffolding.md deleted file mode 100644 index 5ccbcf8..0000000 --- a/src/sections/rails/scaffolding.md +++ /dev/null @@ -1,190 +0,0 @@ -# scaffolding - -
    - -* rails - -
    ----- -## Scaffolding - -El concepto de scaffold lo utilizan varios frameworks para simplificar la -generación de código a partir de templates parametrizables que -aceleran la generación inicial de CRUD para modelos. Luego se podrá construir a -partir de estos templates personalizando con código. - -Rails, tiene un potente mecanismo de scaffolding que nos permitirá ir armando un -proyecto rails de forma simple y automática. - ----- - -## ¿Qué automatiza rails? - -La generación de: - -* Modelos a partir de migraciones y el código ruby asociado. -* Controladores y rutas que implementan CRUD. -* Vistas que materiaizan las funciones requeridas en cualquier CRUD. - ----- - - -## Ejemplo - -```bash -rails generate scaffold books -``` - -El comando generará: - -* `BooksController` -* El modelo para `Book` -* Una entrada en `config/routes.rb` para [`resources :book`](https://guides.rubyonrails.org/routing.html#resources-on-the-web) -* Tests asociados -* Vistas para cada acción del controlador bajo la carpeta `app/views/books` - ----- - -## Ejemplo - -Lo probamos accediendo a: - -[http://localhost:3000/books](http://localhost:3000/books) - -y veremos que.... - -
    - -Primero debemos correr las migraciones - -```bash -rails db:migrate -``` -
    -
    - - -**¡¡los libros no tienen campos!!** -
    - ----- - -## Scaffold con campos - -Para mejorar nuestro ejemplo, desharemos lo que hicimos y luego volveremos a -correr el comando pero especificando algunos campos. - -**Eliminar lo generado por el scaffold** - -```bash -rails db:rollback -rails destroy scaffold books -``` - -**Crear un nuevo scaffold con campos** - -```bash -rails generate scaffold books \ - title:string author:string publication_year:integer -``` ----- -## Otros generators - -Rails provee generators para las diferentes componentes: - -```bash -rails generate model Fruit name:string color:string -rails generate controller Fruit -rails generate resource post title:string body:text \ - published:boolean -``` - ----- - -## Las rutas - -Es importante entender cómo los controladores funcionan en relación con las -rutas de rails. Podemos analizar entonces, luego de haber creado diferentes -rutas usando los generators, vemos que tenemos en `config/routes.rb` - -```ruby -Rails.application.routes.draw do - resources :posts - resources :books - - root to: 'visitors#new' -end -``` - ----- - - -## Las rutas - -Con el comando `rails routes` podemos ver cómo se expanden esas rutas: - -``` -rails routes --help -rails routes -c posts -rails routes -E -c posts -``` - ----- -## Analizando las rutas - -
    - -En el ejemplo anterior, vemos que aparece `resources :xxxx`. Esto define siete -acciones para implementar CRUD usando veebos HTTP. Si el recurso es `photos` -entonces tendremos: - - - | Verbo HTTP | Path | Controller#Action | ¿Qué hace? | - | --------- | ---- | ----------------- | -------- | - | GET | `/photos` | `photos#index` | Listado de fotos | - | GET | `/photos/new` | `photos#new` | Formulario para crear una nueva foto | - | POST | `/photos` | `photos#create` | Crea la foto | - | GET | `/photos/:id` | `photos#show` | Muestra una foto determinada | - | GET | `/photos/:id/edit` | `photos#edit` | Formulario para editar una foto | - | PATCH/PUT | `/photos/:id` | `photos#update` | Actualiza la foto | - | DELETE | `/photos/:id` | `photos#destroy` | Elimina una foto | - -
    ----- - -## Posibilidades con las rutas - -* Especificar múltiples recursos al mismo tiempo: `resources :photos, :books, - :videos` -* Rutas singulares: - * **`get 'profile', to: 'users#show'`** - * **`resoruces :photo`** genera seis acciones (no incluye el list) -* Pueden anidarse para por ejemplo CRUD de un modelo que esté relacionado. Por - ejemplo como sucedería por ejemplo en un modelo `Person` que tiene asociado - `Pet`. Es posible tener rutas como **`/people/:id/pets/new`** - - ----- -### ¿Y cómo sé la url de una ruta? - -
    - -Al crear una ruta usando resource, se generan además una serie de helpers que -pueden usarse en el controller y vistas, como por ejemplo para `:photos` -tenderemos entonces: - - -* **`photos_path`:** retornará /photos -* **`new_photo_path`:** retornará /photos/new -* **`edit_photo_path(:id)`:** retornará /photos/:id/edit (entonces, `edit_photo_path(10)` retornará /photos/10/edit) -* **`photo_path(:id)`:** retornará /photos/:id (entonces, `photo_path(10)` retornará /photos/10) - -> Los mismos helpers con sufijo `_url` en vez de `_path` proveen URLs absolutas - -
    - ----- -### Ruteo en rails - -La mejor forma de aprender todas las capacidades del ruteo en rails, es -recomendable leer [Rails Routing from the Outside In](https://guides.rubyonrails.org/routing.html). diff --git a/src/start.md b/src/start.md deleted file mode 100644 index 0dcfd46..0000000 --- a/src/start.md +++ /dev/null @@ -1,53 +0,0 @@ ---- -title: Tecnologías de Producción de Software -theme: white -highlightTheme: vs2015 -preprocessor: preproc.js -revealOptions: - transition: 'slide' - ---- -### Tecnologías de Producción de Software - - - -# Ruby - -
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    ---- - -FILE: presentacion.md - ---- - -FILE: introduccion.md - ---- - -FILE: lenguaje.md - ---- - -FILE: gemas.md - ---- - -FILE: active-record.md - ---- - -FILE: rails.md ---- - -FILE: 12-factors.md diff --git a/start.html b/start.html new file mode 100644 index 0000000..c7bf153 --- /dev/null +++ b/start.html @@ -0,0 +1,6449 @@ + + + + + + + Tecnologías de Producción de Software + + + + + + + + + + + +
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