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Commit 278b670

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cpsievertcpsievert
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Add kaleido() for static image exporting (#1971)
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‎.github/workflows/R-CMD-check.yaml

Copy file name to clipboardExpand all lines: .github/workflows/R-CMD-check.yaml
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@@ -72,35 +72,33 @@ jobs:
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key: ${{ matrix.config.os }}-${{ steps.install-r.outputs.installed-r-version }}-1-${{ hashFiles('.github/r-depends.rds') }}
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restore-keys: ${{ matrix.config.os }}-${{ steps.install-r.outputs.installed-r-version }}-1-
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- name: Install system dependencies
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- name: Install Linux sysdeps
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if: runner.os == 'Linux'
7777
run: |
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pak::local_system_requirements(execute = TRUE)
7979
pak::pkg_system_requirements("rcmdcheck", execute = TRUE)
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shell: Rscript {0}
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- uses: actions/setup-node@v1
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with:
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node-version: ${{ matrix.config.node }}
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- name: Install orca
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if: matrix.config.visual_tests == true
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run: npm install -g electron@6.1.4 orca
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shell: bash
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- name: Install phantomjs
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if: matrix.config.shinytest == true
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run: |
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pak::pak("shinytest")
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shinytest::installDependencies()
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pak::pak()
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shell: Rscript {0}
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- name: Install dependencies
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run: |
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pak::local_install_dev_deps(upgrade = TRUE)
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if (Sys.info()[['sysname']] == 'Darwin') options(pkgType = 'mac.binary')
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pak::local_install_dev_deps(upgrade = FALSE)
10286
pak::pkg_install("rcmdcheck")
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shell: Rscript {0}
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- name: Set up Python 3.8
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uses: actions/setup-python@v2
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with:
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python-version: 3.8
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- name: Install kaleido
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if: matrix.config.visual_tests == true
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run: |
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sudo chown -R $UID $CONDA # https://github.com/nextstrain/conda/issues/5
98+
Rscript -e "reticulate::install_miniconda()"
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Rscript -e "reticulate::conda_install('r-reticulate', 'python-kaleido')"
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Rscript -e "reticulate::conda_install('r-reticulate', 'plotly', channel = 'plotly')"
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Rscript -e "reticulate::use_miniconda('r-reticulate')"
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- name: Session info
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run: |
@@ -109,10 +107,17 @@ jobs:
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sessioninfo::session_info(pkgs, include_base = TRUE)
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shell: Rscript {0}
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- name: Install shinytest deps
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if: matrix.config.shinytest == true
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run: |
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Rscript -e 'shinytest::installDependencies()'
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R CMD install .
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shell: bash
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# Run test() before R CMD check since, for some reason, rcmdcheck::rcmdcheck() skips vdiffr tests
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- name: Run Tests
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run: |
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options(crayon.enabled = TRUE)
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options(crayon.enabled = TRUE, testthat.progress.max_fails=1000)
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if (!require(devtools)) pak::pak("devtools")
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if (!require(reshape2)) pak::pak("reshape2")
118123
res <- devtools::test()

‎DESCRIPTION

Copy file name to clipboardExpand all lines: DESCRIPTION
+3-1
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@@ -67,13 +67,15 @@ Suggests:
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dendextend,
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maptools,
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rgeos,
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sf,
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png,
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IRdisplay,
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processx,
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plotlyGeoAssets,
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forcats,
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palmerpenguins,
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rversions
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rversions,
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reticulate
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LazyData: true
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RoxygenNote: 7.1.1
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Encoding: UTF-8

‎NAMESPACE

Copy file name to clipboardExpand all lines: NAMESPACE
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@@ -34,6 +34,7 @@ S3method(print,api)
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S3method(print,api_grid)
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S3method(print,api_grid_local)
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S3method(print,api_plot)
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S3method(print,kaleidoScope)
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S3method(print,plotly_data)
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S3method(to_basic,GeomAbline)
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S3method(to_basic,GeomAnnotationMap)
@@ -136,6 +137,7 @@ export(hide_guides)
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export(hide_legend)
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export(highlight)
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export(highlight_key)
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export(kaleido)
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export(knit_print.api_grid)
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export(knit_print.api_grid_local)
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export(knit_print.api_plot)
@@ -260,6 +262,7 @@ importFrom(tidyr,unnest)
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importFrom(tools,file_ext)
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importFrom(tools,file_path_sans_ext)
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importFrom(utils,browseURL)
265+
importFrom(utils,capture.output)
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importFrom(utils,data)
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importFrom(utils,file.edit)
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importFrom(utils,getFromNamespace)

‎NEWS.md

Copy file name to clipboardExpand all lines: NEWS.md
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@@ -8,6 +8,10 @@
88

99
* `ggplotly()` now uses the `layout.legend.title` (instead of `layout.annotations`) plotly.js API to convert guides for discrete scales. (#1961)
1010

11+
## New Features
12+
13+
* Added new `kaleido()` function for static image exporting via the [kaleido python package](https://github.com/plotly/Kaleido). See `help(kaleido, package = "plotly")` for installation info and example usage. (#1971)
14+
1115
## Improvements
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* `ggplotly()` now better positions axis titles for `facet_wrap()`/`facet_grid()`. (#1975)

‎R/kaleido.R

Copy file name to clipboard
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1+
#' Static image exporting via kaleido
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#'
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#' Static image exporting via [the kaleido python
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#' package](https://github.com/plotly/Kaleido/). `kaleido()` imports
5+
#' kaleido into a \pkg{reticulate}d Python session and returns a `$transform()`
6+
#' method for converting R plots into static images (see examples below).
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#'
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#' @section Installation:
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#'
10+
#' `kaleido()` requires [the kaleido python
11+
#' package](https://github.com/plotly/Kaleido/) to be usable via the \pkg{reticulate} package. Here is a recommended way to do the installation:
12+
#'
13+
#' ```
14+
#' install.packages('reticulate')
15+
#' reticulate::install_miniconda()
16+
#' reticulate::conda_install('r-reticulate', 'python-kaleido')
17+
#' reticulate::conda_install('r-reticulate', 'plotly', channel = 'plotly')
18+
#' reticulate::use_miniconda('r-reticulate')
19+
#' ```
20+
#'
21+
#' @param ... not currently used.
22+
#' @export
23+
#' @return an environment which contains:
24+
#' * `transform()`: a function to convert plots objects into static images,
25+
#' with the following arguments:
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#' * `p`: a plot object.
27+
#' * `file`: a file path with a suitable file extension (png, jpg, jpeg,
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#' webp, svg, or pdf).
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#' * `width`, `height`: The width/height of the exported image in layout
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#' pixels. If `scale` is 1, this will also be the width/height of the
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#' exported image in physical pixels.
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#' * `scale`: The scale factor to use when exporting the figure. A scale
33+
#' factor larger than 1.0 will increase the image resolution with
34+
#' respect to the figure's layout pixel dimensions. Whereas as
35+
#' scale factor of less than 1.0 will decrease the image resolution.
36+
#' * `shutdown()`: a function for shutting down any currently running subprocesses
37+
#' that were launched via `transform()`
38+
#' * `scope`: a reference to the underlying `kaleido.scopes.plotly.PlotlyScope`
39+
#' python object. Modify this object to customize the underlying Chromium
40+
#' subprocess and/or configure other details such as URL to plotly.js, MathJax, etc.
41+
#' @examples
42+
#'
43+
#' \dontrun{
44+
#' scope <- kaleido()
45+
#' tmp <- tempfile(fileext = ".png")
46+
#' scope$transform(plot_ly(x = 1:10), tmp)
47+
#' file.show(tmp)
48+
#' # Remove and garbage collect to remove
49+
#' # R/Python objects and shutdown subprocesses
50+
#' rm(scope); gc()
51+
#' }
52+
#'
53+
kaleido <- function(...) {
54+
if (!rlang::is_installed("reticulate")) {
55+
stop("`kaleido()` requires the reticulate package.")
56+
}
57+
if (!reticulate::py_available(initialize = TRUE)) {
58+
stop("`kaleido()` requires `reticulate::py_available()` to be `TRUE`. Do you need to install python?")
59+
}
60+
61+
py <- reticulate::py
62+
scope_name <- paste0("scope_", new_id())
63+
py[[scope_name]] <- reticulate::import("kaleido")$scopes$plotly$PlotlyScope(
64+
plotlyjs = plotlyMainBundlePath()
65+
)
66+
67+
scope <- py[[scope_name]]
68+
69+
mapbox <- Sys.getenv("MAPBOX_TOKEN", NA)
70+
if (!is.na(mapbox)) {
71+
scope$mapbox_access_token <- mapbox
72+
}
73+
74+
res <- list2env(list(
75+
scope = scope,
76+
# https://github.com/plotly/Kaleido/blob/6a46ecae/repos/kaleido/py/kaleido/scopes/plotly.py#L78-L106
77+
transform = function(p, file = "figure.png", width = NULL, height = NULL, scale = NULL) {
78+
# Perform JSON conversion exactly how the R package would do it
79+
# (this is essentially plotly_json(), without the additional unneeded info)
80+
# and attach as an attribute on the python scope object
81+
scope[["_last_plot"]] <- to_JSON(
82+
plotly_build(p)$x[c("data", "layout", "config")]
83+
)
84+
# On the python side, _last_plot is a string, so use json.loads() to
85+
# convert to dict(). This should be fine since json is a dependency of the
86+
# BaseScope() https://github.com/plotly/Kaleido/blob/586be5/repos/kaleido/py/kaleido/scopes/base.py#L2
87+
transform_cmd <- sprintf(
88+
"%s.transform(sys.modules['json'].loads(%s._last_plot), format='%s', width=%s, height=%s, scale=%s)",
89+
scope_name, scope_name, tools::file_ext(file),
90+
reticulate::r_to_py(width), reticulate::r_to_py(height),
91+
reticulate::r_to_py(scale)
92+
)
93+
# Write the base64 encoded string that transform() returns to disk
94+
# https://github.com/plotly/Kaleido/blame/master/README.md#L52
95+
reticulate::py_run_string(
96+
sprintf("open('%s', 'wb').write(%s)", file, transform_cmd)
97+
)
98+
},
99+
# Shutdown the kaleido subprocesses
100+
# https://github.com/plotly/Kaleido/blob/586be5c/repos/kaleido/py/kaleido/scopes/base.py#L71-L72
101+
shutdown = function() {
102+
reticulate::py_run_string(paste0(scope_name, ".__del__()"))
103+
}
104+
))
105+
106+
# Shutdown subprocesses and delete python scope when
107+
# this object is garbage collected by R
108+
reg.finalizer(res, onexit = TRUE, function(x) {
109+
x$shutdown()
110+
reticulate::py_run_string(paste("del", scope_name))
111+
})
112+
113+
class(res) <- "kaleidoScope"
114+
res
115+
}
116+
117+
118+
#' Print method for kaleido
119+
#'
120+
#' S3 method for [kaleido()].
121+
#'
122+
#' @param x a [kaleido()] object.
123+
#' @param ... currently unused.
124+
#' @export
125+
#' @importFrom utils capture.output
126+
#' @keywords internal
127+
print.kaleidoScope <- function(x, ...) {
128+
args <- formals(x$transform)
129+
cat("$transform: function(", paste(names(args), collapse = ", "), ")\n", sep = "")
130+
cat("$shutdown: function()\n")
131+
cat("$scope: ", utils::capture.output(x$scope))
132+
}

‎R/orca.R

Copy file name to clipboardExpand all lines: R/orca.R
+8-21
Original file line numberDiff line numberDiff line change
@@ -1,13 +1,6 @@
1-
#' Static image exporting
1+
#' Static image exporting via orca
22
#'
3-
#' Export plotly objects to static images (e.g., pdf, png, jpeg, svg, etc) via the
4-
#' [orca command-line utility](https://github.com/plotly/orca#installation).
5-
#'
6-
#' The `orca()` function is designed for exporting one plotly graph whereas `orca_serve()`
7-
#' is meant for exporting many graphs at once. The former starts and stops an external (nodejs)
8-
#' process everytime it is called whereas the latter starts up a process when called, then
9-
#' returns an `export()` method for exporting graphs as well as a `close()` method for stopping
10-
#' the external (background) process.
3+
#' Superseded by [kaleido()].
114
#'
125
#' @param p a plotly object.
136
#' @param file output filename.
@@ -67,17 +60,14 @@ orca <- function(p, file = "plot.png", format = tools::file_ext(file),
6760
parallel_limit = NULL, verbose = FALSE, debug = FALSE,
6861
safe = FALSE, more_args = NULL, ...) {
6962

63+
.Deprecated("kaleido")
64+
7065
orca_available()
7166

7267
b <- plotly_build(p)
7368

7469
# find the relevant plotly.js bundle
75-
plotlyjs <- plotlyjsBundle(b)
76-
plotlyjs_path <- file.path(plotlyjs$src$file, plotlyjs$script)
77-
# package field means src file path should be relative to pkg dir
78-
if (!is.null(plotlyjs$package)) {
79-
plotlyjs_path <- system.file(plotlyjs_path, package = plotlyjs$package)
80-
}
70+
plotlyjs_path <- plotlyMainBundlePath()
8171

8272
tmp <- tempfile(fileext = ".json")
8373
cat(to_JSON(b$x[c("data", "layout")]), file = tmp)
@@ -141,17 +131,14 @@ orca_serve <- function(port = 5151, mathjax = FALSE, safe = FALSE, request_limit
141131
keep_alive = TRUE, window_max_number = NULL, quiet = FALSE,
142132
debug = FALSE, more_args = NULL, ...) {
143133

134+
.Deprecated("kaleido")
135+
144136
# make sure we have the required infrastructure
145137
orca_available()
146138
try_library("processx", "orca_serve")
147139

148140
# use main bundle since any plot can be thrown at the server
149-
plotlyjs <- plotlyMainBundle()
150-
plotlyjs_path <- file.path(plotlyjs$src$file, plotlyjs$script)
151-
# package field means src file path should be relative to pkg dir
152-
if (!is.null(plotlyjs$package)) {
153-
plotlyjs_path <- system.file(plotlyjs_path, package = plotlyjs$package)
154-
}
141+
plotlyjs_path <- plotlyMainBundlePath()
155142

156143
args <- c(
157144
"serve",

‎R/plotly.R

Copy file name to clipboardExpand all lines: R/plotly.R
+9
Original file line numberDiff line numberDiff line change
@@ -487,6 +487,15 @@ plotlyMainBundle <- function() {
487487
)
488488
}
489489

490+
plotlyMainBundlePath <- function() {
491+
dep <- plotlyMainBundle()
492+
path <- file.path(dep$src$file, dep$script)
493+
if (!is.null(dep$package)) {
494+
path <- system.file(path, package = dep$package)
495+
}
496+
path
497+
}
498+
490499
plotlyHtmlwidgetsCSS <- function() {
491500
htmltools::htmlDependency(
492501
name = "plotly-htmlwidgets-css",

‎man/kaleido.Rd

Copy file name to clipboardExpand all lines: man/kaleido.Rd
+64
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