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/**
* @add jQuery.fn
*/
steal('jquery/dom').then(function($){
/**
* @function compare
* @parent dom
* @download http://jmvcsite.heroku.com/pluginify?plugins[]=jquery/dom/compare/compare.js
*
* Compares the position of two nodes and returns a bitmask detailing how they are positioned
* relative to each other.
*
* $('#foo').compare($('#bar')) //-> Number
*
* You can expect it to return the same results as
* [http://www.w3.org/TR/DOM-Level-3-Core/core.html#Node3-compareDocumentPosition | compareDocumentPosition].
* Parts of this documentation and source come from [http://ejohn.org/blog/comparing-document-position | John Resig].
*
* ## Demo
* @demo jquery/dom/compare/compare.html
* @test jquery/dom/compare/qunit.html
* @plugin dom/compare
*
*
* @param {HTMLElement|jQuery} element an element or jQuery collection to compare against.
* @return {Number} A bitmap number representing how the elements are positioned from each other.
*
* If the code looks like:
*
* $('#foo').compare($('#bar')) //-> Number
*
* Number is a bitmap with with the following values:
* <table class='options'>
* <tr><th>Bits</th><th>Number</th><th>Meaning</th></tr>
* <tr><td>000000</td><td>0</td><td>Elements are identical.</td></tr>
* <tr><td>000001</td><td>1</td><td>The nodes are in different
* documents (or one is outside of a document).</td></tr>
* <tr><td>000010</td><td>2</td><td>#bar precedes #foo.</td></tr>
* <tr><td>000100</td><td>4</td><td>#foo precedes #bar.</td></tr>
* <tr><td>001000</td><td>8</td><td>#bar contains #foo.</td></tr>
* <tr><td>010000</td><td>16</td><td>#foo contains #bar.</td></tr>
* </table>
*/
jQuery.fn.compare = function(element){ //usually
//element is usually a relatedTarget, but element/c it is we have to avoid a few FF errors
try{ //FF3 freaks out with XUL
element = element.jquery ? element[0] : element;
}catch(e){
return null;
}
if (window.HTMLElement) { //make sure we aren't coming from XUL element
var s = HTMLElement.prototype.toString.call(element)
if (s == '[xpconnect wrapped native prototype]' || s == '[object XULElement]' || s === '[object Window]') {
return null;
}
}
if(this[0].compareDocumentPosition){
return this[0].compareDocumentPosition(element);
}
if(this[0] == document && element != document) return 8;
var number = (this[0] !== element && this[0].contains(element) && 16) + (this[0] != element && element.contains(this[0]) && 8),
docEl = document.documentElement;
if(this[0].sourceIndex){
number += (this[0].sourceIndex < element.sourceIndex && 4)
number += (this[0].sourceIndex > element.sourceIndex && 2)
number += (this[0].ownerDocument !== element.ownerDocument ||
(this[0] != docEl && this[0].sourceIndex <= 0 ) ||
(element != docEl && element.sourceIndex <= 0 )) && 1
}else{
var range = document.createRange(),
sourceRange = document.createRange(),
compare;
range.selectNode(this[0]);
sourceRange.selectNode(element);
compare = range.compareBoundaryPoints(Range.START_TO_START, sourceRange);
}
return number;
}
});