doevisualizations/doeVisualization/node_modules/jquerypp/dom/compare/compare.js

Data Visualization Library based on RequireJS and D3.js (v4+)

steal('jquery', function($) {

/**
 * @function jQuery.fn.compare
 * @parent jQuery.compare
 * @hide
 *
 * Compare two elements and return a bitmask as a number representing the following conditions:
 *
 * - `000000` -> __0__: Elements are identical
 * - `000001` -> __1__: The nodes are in different documents (or one is outside of a document)
 * - `000010` -> __2__: #bar precedes #foo
 * - `000100` -> __4__: #foo precedes #bar
 * - `001000` -> __8__: #bar contains #foo
 * - `010000` -> __16__: #foo contains #bar
 *
 * You can check for any of these conditions using a bitwise AND:
 *
 *     if( $('#foo').compare($('#bar')) & 2 ) {
 *       console.log("#bar precedes #foo")
 *     }
 *
 * @param {HTMLElement|jQuery} element an element or jQuery collection to compare against.
 * @return {Number} A number representing a bitmask deatiling how the elements are positioned from each other.
 */

// See http://ejohn.org/blog/comparing-document-position/
$.fn.compare = function(element){ //usually
	try{
		// Firefox 3 throws an error with XUL - we can't use compare then
		element = element.jquery ? element[0] : element;
	}catch(e){
		return null;
	}

	// make sure we aren't coming from XUL element
	if (window.HTMLElement) {
		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){
		// For browsers that support it, use compareDocumentPosition
		// https://developer.mozilla.org/en/DOM/Node.compareDocumentPosition
		return this[0].compareDocumentPosition(element);
	}

	// this[0] contains element
	if(this[0] == document && element != document) return 8;

	var number =
			// this[0] contains element
			(this[0] !== element && this[0].contains(element) && 16) +
			// element contains this[0]
			(this[0] != element && element.contains(this[0]) && 8),
		docEl = document.documentElement;

	// Use the sourceIndex
	if(this[0].sourceIndex){
		// this[0] precedes element
		number += (this[0].sourceIndex < element.sourceIndex && 4)
		// element precedes foo[0]
		number += (this[0].sourceIndex > element.sourceIndex && 2)
		// The nodes are in different documents
		number += (this[0].ownerDocument !== element.ownerDocument ||
			(this[0] != docEl && this[0].sourceIndex <= 0 ) ||
			(element != docEl && element.sourceIndex <= 0 )) && 1
	}

	return number;
}

return $;
});