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Support inverted display of suggestions #68

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Support inverted display of suggestions #68

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2048241
Add optional params parentElementId and invertScroll to support inver…
danwild Mar 7, 2018
88b9e2e
Update min.js version
danwild Mar 7, 2018
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21 changes: 15 additions & 6 deletions 21 auto-complete.js
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Original file line number Diff line number Diff line change
Expand Up @@ -37,6 +37,8 @@ var autoComplete = (function(){
offsetTop: 1,
cache: 1,
menuClass: '',
invertScroll: false,
parentElementId: 'body',
renderItem: function (item, search){
// escape special characters
search = search.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&');
Expand All @@ -52,9 +54,10 @@ var autoComplete = (function(){
for (var i=0; i<elems.length; i++) {
var that = elems[i];

// create suggestions container "sc"
that.sc = document.createElement('div');
that.sc.className = 'autocomplete-suggestions '+o.menuClass;
// create container and suggestions div "sc"
var container = document.getElementById(o.parentElementId);
that.sc = document.createElement('div');
that.sc.className = 'autocomplete-suggestions '+o.menuClass;

that.autocompleteAttr = that.getAttribute('autocomplete');
that.setAttribute('autocomplete', 'off');
Expand All @@ -71,7 +74,12 @@ var autoComplete = (function(){
if (!that.sc.maxHeight) { that.sc.maxHeight = parseInt((window.getComputedStyle ? getComputedStyle(that.sc, null) : that.sc.currentStyle).maxHeight); }
if (!that.sc.suggestionHeight) that.sc.suggestionHeight = that.sc.querySelector('.autocomplete-suggestion').offsetHeight;
if (that.sc.suggestionHeight)
if (!next) that.sc.scrollTop = 0;
if (!next && !o.invertScroll) that.sc.scrollTop = 0;
else if(o.invertScroll){
if(that.sc.scrollHeight > that.sc.maxHeight){
that.sc.scrollTop = that.sc.scrollHeight;
}
}
else {
var scrTop = that.sc.scrollTop, selTop = next.getBoundingClientRect().top - that.sc.getBoundingClientRect().top;
if (selTop + that.sc.suggestionHeight - that.sc.maxHeight > 0)
Expand All @@ -80,9 +88,10 @@ var autoComplete = (function(){
that.sc.scrollTop = selTop + scrTop;
}
}
}
};

addEvent(window, 'resize', that.updateSC);
document.body.appendChild(that.sc);
container.appendChild(that.sc);

live('autocomplete-suggestion', 'mouseleave', function(e){
var sel = that.sc.querySelector('.autocomplete-suggestion.selected');
Expand Down
2 changes: 1 addition & 1 deletion 2 auto-complete.min.js
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16 changes: 15 additions & 1 deletion 16 demo.html
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Original file line number Diff line number Diff line change
Expand Up @@ -111,7 +111,21 @@ <h3>Settings</h3>
<tr><td>offsetLeft</td><td><i>0</i></td><td>Optional left offset of the suggestions container.</td></tr>
<tr><td>offsetTop</td><td><i>1</i></td><td>Optional top offset of the suggestions container.</td></tr>
<tr><td>cache</td><td><i>true</i></td><td>Determines if performed searches should be cached.</td></tr>
<tr>
<tr>
<td>invertScroll</td><td><i>false</i></td>
<td>If true, ensures suggestions at the bottom of the list are scrolled into view first.
<br/>Why? If your input element is in the footer, you may need to display suggestions <em>above</em> the
input - with best suggestions at the bottom of the list instead of the top.<br/>
Note that the default css does not support inverted autocomplete (you need to define this yourself).
</td>
</tr>
<tr>
<td>parentElementId</td><td><i>'body'</i></td>
<td>Custom container div to append autocomplete suggestions.
<br>Example: <span class="inline-code">{ parentElementId: 'my-container' }</span>
</td>
</tr>
<tr>
<td>menuClass</td><td><i>''</i></td>
<td>Custom class/es that get/s added to the dropdown menu container.
<br>Example: <span class="inline-code">{ menuClass: 'class1 class2' }</span></td>
Expand Down
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