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			764 lines
		
	
	
		
			33 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
			
		
		
	
	
			764 lines
		
	
	
		
			33 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
(function (global, factory) {
 | 
						|
    typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
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        typeof define === 'function' && define.amd ? define(factory) :
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            (global = global || self, global.morphdom = factory());
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						|
}(this, function () { 'use strict';
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						|
 | 
						|
    var DOCUMENT_FRAGMENT_NODE = 11;
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						|
 | 
						|
    function morphAttrs(fromNode, toNode) {
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						|
        var toNodeAttrs = toNode.attributes;
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						|
        var attr;
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        var attrName;
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						|
        var attrNamespaceURI;
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						|
        var attrValue;
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						|
        var fromValue;
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						|
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						|
        // document-fragments dont have attributes so lets not do anything
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        if (toNode.nodeType === DOCUMENT_FRAGMENT_NODE || fromNode.nodeType === DOCUMENT_FRAGMENT_NODE) {
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						|
            return;
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						|
        }
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						|
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						|
        // update attributes on original DOM element
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						|
        for (var i = toNodeAttrs.length - 1; i >= 0; i--) {
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            attr = toNodeAttrs[i];
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            attrName = attr.name;
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						|
            attrNamespaceURI = attr.namespaceURI;
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            attrValue = attr.value;
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						|
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						|
            if (attrNamespaceURI) {
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						|
                attrName = attr.localName || attrName;
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                fromValue = fromNode.getAttributeNS(attrNamespaceURI, attrName);
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						|
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						|
                if (fromValue !== attrValue) {
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                    if (attr.prefix === 'xmlns'){
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                        attrName = attr.name; // It's not allowed to set an attribute with the XMLNS namespace without specifying the `xmlns` prefix
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                    }
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                    fromNode.setAttributeNS(attrNamespaceURI, attrName, attrValue);
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                }
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            } else {
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                fromValue = fromNode.getAttribute(attrName);
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						|
 | 
						|
                if (fromValue !== attrValue) {
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                    fromNode.setAttribute(attrName, attrValue);
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                }
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            }
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						|
        }
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						|
 | 
						|
        // Remove any extra attributes found on the original DOM element that
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						|
        // weren't found on the target element.
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						|
        var fromNodeAttrs = fromNode.attributes;
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						|
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						|
        for (var d = fromNodeAttrs.length - 1; d >= 0; d--) {
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						|
            attr = fromNodeAttrs[d];
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						|
            attrName = attr.name;
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						|
            attrNamespaceURI = attr.namespaceURI;
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						|
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						|
            if (attrNamespaceURI) {
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						|
                attrName = attr.localName || attrName;
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						|
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						|
                if (!toNode.hasAttributeNS(attrNamespaceURI, attrName)) {
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                    fromNode.removeAttributeNS(attrNamespaceURI, attrName);
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						|
                }
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            } else {
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						|
                if (!toNode.hasAttribute(attrName)) {
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						|
                    fromNode.removeAttribute(attrName);
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						|
                }
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            }
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        }
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    }
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    var range; // Create a range object for efficently rendering strings to elements.
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    var NS_XHTML = 'http://www.w3.org/1999/xhtml';
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    var doc = typeof document === 'undefined' ? undefined : document;
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    var HAS_TEMPLATE_SUPPORT = !!doc && 'content' in doc.createElement('template');
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						|
    var HAS_RANGE_SUPPORT = !!doc && doc.createRange && 'createContextualFragment' in doc.createRange();
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						|
 | 
						|
    function createFragmentFromTemplate(str) {
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        var template = doc.createElement('template');
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        template.innerHTML = str;
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						|
        return template.content.childNodes[0];
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    }
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    function createFragmentFromRange(str) {
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						|
        if (!range) {
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            range = doc.createRange();
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						|
            range.selectNode(doc.body);
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        }
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						|
 | 
						|
        var fragment = range.createContextualFragment(str);
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						|
        return fragment.childNodes[0];
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						|
    }
 | 
						|
 | 
						|
    function createFragmentFromWrap(str) {
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						|
        var fragment = doc.createElement('body');
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						|
        fragment.innerHTML = str;
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						|
        return fragment.childNodes[0];
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						|
    }
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						|
 | 
						|
    /**
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						|
     * This is about the same
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						|
     * var html = new DOMParser().parseFromString(str, 'text/html');
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						|
     * return html.body.firstChild;
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						|
     *
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						|
     * @method toElement
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						|
     * @param {String} str
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						|
     */
 | 
						|
    function toElement(str) {
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						|
        str = str.trim();
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						|
        if (HAS_TEMPLATE_SUPPORT) {
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						|
            // avoid restrictions on content for things like `<tr><th>Hi</th></tr>` which
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						|
            // createContextualFragment doesn't support
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						|
            // <template> support not available in IE
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						|
            return createFragmentFromTemplate(str);
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						|
        } else if (HAS_RANGE_SUPPORT) {
 | 
						|
            return createFragmentFromRange(str);
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        }
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        return createFragmentFromWrap(str);
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    }
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 | 
						|
    /**
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     * Returns true if two node's names are the same.
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     *
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						|
     * NOTE: We don't bother checking `namespaceURI` because you will never find two HTML elements with the same
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						|
     *       nodeName and different namespace URIs.
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     *
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						|
     * @param {Element} a
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						|
     * @param {Element} b The target element
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						|
     * @return {boolean}
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     */
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    function compareNodeNames(fromEl, toEl) {
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						|
        var fromNodeName = fromEl.nodeName;
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						|
        var toNodeName = toEl.nodeName;
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						|
        var fromCodeStart, toCodeStart;
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						|
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						|
        if (fromNodeName === toNodeName) {
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            return true;
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						|
        }
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						|
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        fromCodeStart = fromNodeName.charCodeAt(0);
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        toCodeStart = toNodeName.charCodeAt(0);
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						|
        // If the target element is a virtual DOM node or SVG node then we may
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        // need to normalize the tag name before comparing. Normal HTML elements that are
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        // in the "http://www.w3.org/1999/xhtml"
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        // are converted to upper case
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						|
        if (fromCodeStart <= 90 && toCodeStart >= 97) { // from is upper and to is lower
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            return fromNodeName === toNodeName.toUpperCase();
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						|
        } else if (toCodeStart <= 90 && fromCodeStart >= 97) { // to is upper and from is lower
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						|
            return toNodeName === fromNodeName.toUpperCase();
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        } else {
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            return false;
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        }
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    }
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						|
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						|
    /**
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     * Create an element, optionally with a known namespace URI.
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     *
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						|
     * @param {string} name the element name, e.g. 'div' or 'svg'
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						|
     * @param {string} [namespaceURI] the element's namespace URI, i.e. the value of
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						|
     * its `xmlns` attribute or its inferred namespace.
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     *
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						|
     * @return {Element}
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     */
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    function createElementNS(name, namespaceURI) {
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        return !namespaceURI || namespaceURI === NS_XHTML ?
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            doc.createElement(name) :
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						|
            doc.createElementNS(namespaceURI, name);
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    }
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						|
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						|
    /**
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     * Copies the children of one DOM element to another DOM element
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     */
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    function moveChildren(fromEl, toEl) {
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						|
        var curChild = fromEl.firstChild;
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						|
        while (curChild) {
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						|
            var nextChild = curChild.nextSibling;
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						|
            toEl.appendChild(curChild);
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						|
            curChild = nextChild;
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        }
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        return toEl;
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    }
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    function syncBooleanAttrProp(fromEl, toEl, name) {
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						|
        if (fromEl[name] !== toEl[name]) {
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            fromEl[name] = toEl[name];
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						|
            if (fromEl[name]) {
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                fromEl.setAttribute(name, '');
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						|
            } else {
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                fromEl.removeAttribute(name);
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						|
            }
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        }
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    }
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    var specialElHandlers = {
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        OPTION: function(fromEl, toEl) {
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            var parentNode = fromEl.parentNode;
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						|
            if (parentNode) {
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						|
                var parentName = parentNode.nodeName.toUpperCase();
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						|
                if (parentName === 'OPTGROUP') {
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                    parentNode = parentNode.parentNode;
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						|
                    parentName = parentNode && parentNode.nodeName.toUpperCase();
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                }
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                if (parentName === 'SELECT' && !parentNode.hasAttribute('multiple')) {
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						|
                    if (fromEl.hasAttribute('selected') && !toEl.selected) {
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						|
                        // Workaround for MS Edge bug where the 'selected' attribute can only be
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						|
                        // removed if set to a non-empty value:
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						|
                        // https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/12087679/
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						|
                        fromEl.setAttribute('selected', 'selected');
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						|
                        fromEl.removeAttribute('selected');
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						|
                    }
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						|
                    // We have to reset select element's selectedIndex to -1, otherwise setting
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						|
                    // fromEl.selected using the syncBooleanAttrProp below has no effect.
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						|
                    // The correct selectedIndex will be set in the SELECT special handler below.
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						|
                    parentNode.selectedIndex = -1;
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						|
                }
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						|
            }
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						|
            syncBooleanAttrProp(fromEl, toEl, 'selected');
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						|
        },
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						|
        /**
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						|
         * The "value" attribute is special for the <input> element since it sets
 | 
						|
         * the initial value. Changing the "value" attribute without changing the
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						|
         * "value" property will have no effect since it is only used to the set the
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						|
         * initial value.  Similar for the "checked" attribute, and "disabled".
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						|
         */
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						|
        INPUT: function(fromEl, toEl) {
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						|
            syncBooleanAttrProp(fromEl, toEl, 'checked');
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						|
            syncBooleanAttrProp(fromEl, toEl, 'disabled');
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						|
            if (fromEl.value !== toEl.value) {
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						|
                fromEl.value = toEl.value;
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						|
            }
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						|
 | 
						|
            if (!toEl.hasAttribute('value')) {
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						|
                fromEl.removeAttribute('value');
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						|
            }
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						|
        },
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						|
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        TEXTAREA: function(fromEl, toEl) {
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            var newValue = toEl.value;
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						|
            if (fromEl.value !== newValue) {
 | 
						|
                fromEl.value = newValue;
 | 
						|
            }
 | 
						|
 | 
						|
            var firstChild = fromEl.firstChild;
 | 
						|
            if (firstChild) {
 | 
						|
                // Needed for IE. Apparently IE sets the placeholder as the
 | 
						|
                // node value and vise versa. This ignores an empty update.
 | 
						|
                var oldValue = firstChild.nodeValue;
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						|
 | 
						|
                if (oldValue == newValue || (!newValue && oldValue == fromEl.placeholder)) {
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						|
                    return;
 | 
						|
                }
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						|
 | 
						|
                firstChild.nodeValue = newValue;
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						|
            }
 | 
						|
        },
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						|
        SELECT: function(fromEl, toEl) {
 | 
						|
            if (!toEl.hasAttribute('multiple')) {
 | 
						|
                var selectedIndex = -1;
 | 
						|
                var i = 0;
 | 
						|
                // We have to loop through children of fromEl, not toEl since nodes can be moved
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						|
                // from toEl to fromEl directly when morphing.
 | 
						|
                // At the time this special handler is invoked, all children have already been morphed
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						|
                // and appended to / removed from fromEl, so using fromEl here is safe and correct.
 | 
						|
                var curChild = fromEl.firstChild;
 | 
						|
                var optgroup;
 | 
						|
                var nodeName;
 | 
						|
                while(curChild) {
 | 
						|
                    nodeName = curChild.nodeName && curChild.nodeName.toUpperCase();
 | 
						|
                    if (nodeName === 'OPTGROUP') {
 | 
						|
                        optgroup = curChild;
 | 
						|
                        curChild = optgroup.firstChild;
 | 
						|
                    } else {
 | 
						|
                        if (nodeName === 'OPTION') {
 | 
						|
                            if (curChild.hasAttribute('selected')) {
 | 
						|
                                selectedIndex = i;
 | 
						|
                                break;
 | 
						|
                            }
 | 
						|
                            i++;
 | 
						|
                        }
 | 
						|
                        curChild = curChild.nextSibling;
 | 
						|
                        if (!curChild && optgroup) {
 | 
						|
                            curChild = optgroup.nextSibling;
 | 
						|
                            optgroup = null;
 | 
						|
                        }
 | 
						|
                    }
 | 
						|
                }
 | 
						|
 | 
						|
                fromEl.selectedIndex = selectedIndex;
 | 
						|
            }
 | 
						|
        }
 | 
						|
    };
 | 
						|
 | 
						|
    var ELEMENT_NODE = 1;
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						|
    var DOCUMENT_FRAGMENT_NODE$1 = 11;
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						|
    var TEXT_NODE = 3;
 | 
						|
    var COMMENT_NODE = 8;
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						|
 | 
						|
    function noop() {}
 | 
						|
 | 
						|
    function defaultGetNodeKey(node) {
 | 
						|
        if (node) {
 | 
						|
            return (node.getAttribute && node.getAttribute('id')) || node.id;
 | 
						|
        }
 | 
						|
    }
 | 
						|
 | 
						|
    function morphdomFactory(morphAttrs) {
 | 
						|
 | 
						|
        return function morphdom(fromNode, toNode, options) {
 | 
						|
            if (!options) {
 | 
						|
                options = {};
 | 
						|
            }
 | 
						|
 | 
						|
            if (typeof toNode === 'string') {
 | 
						|
                if (fromNode.nodeName === '#document' || fromNode.nodeName === 'HTML' || fromNode.nodeName === 'BODY') {
 | 
						|
                    var toNodeHtml = toNode;
 | 
						|
                    toNode = doc.createElement('html');
 | 
						|
                    toNode.innerHTML = toNodeHtml;
 | 
						|
                } else {
 | 
						|
                    toNode = toElement(toNode);
 | 
						|
                }
 | 
						|
            }
 | 
						|
 | 
						|
            var getNodeKey = options.getNodeKey || defaultGetNodeKey;
 | 
						|
            var onBeforeNodeAdded = options.onBeforeNodeAdded || noop;
 | 
						|
            var onNodeAdded = options.onNodeAdded || noop;
 | 
						|
            var onBeforeElUpdated = options.onBeforeElUpdated || noop;
 | 
						|
            var onElUpdated = options.onElUpdated || noop;
 | 
						|
            var onBeforeNodeDiscarded = options.onBeforeNodeDiscarded || noop;
 | 
						|
            var onNodeDiscarded = options.onNodeDiscarded || noop;
 | 
						|
            var onBeforeElChildrenUpdated = options.onBeforeElChildrenUpdated || noop;
 | 
						|
            var childrenOnly = options.childrenOnly === true;
 | 
						|
 | 
						|
            // This object is used as a lookup to quickly find all keyed elements in the original DOM tree.
 | 
						|
            var fromNodesLookup = Object.create(null);
 | 
						|
            var keyedRemovalList = [];
 | 
						|
 | 
						|
            function addKeyedRemoval(key) {
 | 
						|
                keyedRemovalList.push(key);
 | 
						|
            }
 | 
						|
 | 
						|
            function walkDiscardedChildNodes(node, skipKeyedNodes) {
 | 
						|
                if (node.nodeType === ELEMENT_NODE) {
 | 
						|
                    var curChild = node.firstChild;
 | 
						|
                    while (curChild) {
 | 
						|
 | 
						|
                        var key = undefined;
 | 
						|
 | 
						|
                        if (skipKeyedNodes && (key = getNodeKey(curChild))) {
 | 
						|
                            // If we are skipping keyed nodes then we add the key
 | 
						|
                            // to a list so that it can be handled at the very end.
 | 
						|
                            addKeyedRemoval(key);
 | 
						|
                        } else {
 | 
						|
                            // Only report the node as discarded if it is not keyed. We do this because
 | 
						|
                            // at the end we loop through all keyed elements that were unmatched
 | 
						|
                            // and then discard them in one final pass.
 | 
						|
                            onNodeDiscarded(curChild);
 | 
						|
                            if (curChild.firstChild) {
 | 
						|
                                walkDiscardedChildNodes(curChild, skipKeyedNodes);
 | 
						|
                            }
 | 
						|
                        }
 | 
						|
 | 
						|
                        curChild = curChild.nextSibling;
 | 
						|
                    }
 | 
						|
                }
 | 
						|
            }
 | 
						|
 | 
						|
            /**
 | 
						|
             * Removes a DOM node out of the original DOM
 | 
						|
             *
 | 
						|
             * @param  {Node} node The node to remove
 | 
						|
             * @param  {Node} parentNode The nodes parent
 | 
						|
             * @param  {Boolean} skipKeyedNodes If true then elements with keys will be skipped and not discarded.
 | 
						|
             * @return {undefined}
 | 
						|
             */
 | 
						|
            function removeNode(node, parentNode, skipKeyedNodes) {
 | 
						|
                if (onBeforeNodeDiscarded(node) === false) {
 | 
						|
                    return;
 | 
						|
                }
 | 
						|
 | 
						|
                if (parentNode) {
 | 
						|
                    parentNode.removeChild(node);
 | 
						|
                }
 | 
						|
 | 
						|
                onNodeDiscarded(node);
 | 
						|
                walkDiscardedChildNodes(node, skipKeyedNodes);
 | 
						|
            }
 | 
						|
 | 
						|
            // // TreeWalker implementation is no faster, but keeping this around in case this changes in the future
 | 
						|
            // function indexTree(root) {
 | 
						|
            //     var treeWalker = document.createTreeWalker(
 | 
						|
            //         root,
 | 
						|
            //         NodeFilter.SHOW_ELEMENT);
 | 
						|
            //
 | 
						|
            //     var el;
 | 
						|
            //     while((el = treeWalker.nextNode())) {
 | 
						|
            //         var key = getNodeKey(el);
 | 
						|
            //         if (key) {
 | 
						|
            //             fromNodesLookup[key] = el;
 | 
						|
            //         }
 | 
						|
            //     }
 | 
						|
            // }
 | 
						|
 | 
						|
            // // NodeIterator implementation is no faster, but keeping this around in case this changes in the future
 | 
						|
            //
 | 
						|
            // function indexTree(node) {
 | 
						|
            //     var nodeIterator = document.createNodeIterator(node, NodeFilter.SHOW_ELEMENT);
 | 
						|
            //     var el;
 | 
						|
            //     while((el = nodeIterator.nextNode())) {
 | 
						|
            //         var key = getNodeKey(el);
 | 
						|
            //         if (key) {
 | 
						|
            //             fromNodesLookup[key] = el;
 | 
						|
            //         }
 | 
						|
            //     }
 | 
						|
            // }
 | 
						|
 | 
						|
            function indexTree(node) {
 | 
						|
                if (node.nodeType === ELEMENT_NODE || node.nodeType === DOCUMENT_FRAGMENT_NODE$1) {
 | 
						|
                    var curChild = node.firstChild;
 | 
						|
                    while (curChild) {
 | 
						|
                        var key = getNodeKey(curChild);
 | 
						|
                        if (key) {
 | 
						|
                            fromNodesLookup[key] = curChild;
 | 
						|
                        }
 | 
						|
 | 
						|
                        // Walk recursively
 | 
						|
                        indexTree(curChild);
 | 
						|
 | 
						|
                        curChild = curChild.nextSibling;
 | 
						|
                    }
 | 
						|
                }
 | 
						|
            }
 | 
						|
 | 
						|
            indexTree(fromNode);
 | 
						|
 | 
						|
            function handleNodeAdded(el) {
 | 
						|
                onNodeAdded(el);
 | 
						|
 | 
						|
                var curChild = el.firstChild;
 | 
						|
                while (curChild) {
 | 
						|
                    var nextSibling = curChild.nextSibling;
 | 
						|
 | 
						|
                    var key = getNodeKey(curChild);
 | 
						|
                    if (key) {
 | 
						|
                        var unmatchedFromEl = fromNodesLookup[key];
 | 
						|
                        // if we find a duplicate #id node in cache, replace `el` with cache value
 | 
						|
                        // and morph it to the child node.
 | 
						|
                        if (unmatchedFromEl && compareNodeNames(curChild, unmatchedFromEl)) {
 | 
						|
                            curChild.parentNode.replaceChild(unmatchedFromEl, curChild);
 | 
						|
                            morphEl(unmatchedFromEl, curChild);
 | 
						|
                        } else {
 | 
						|
                            handleNodeAdded(curChild);
 | 
						|
                        }
 | 
						|
                    } else {
 | 
						|
                        // recursively call for curChild and it's children to see if we find something in
 | 
						|
                        // fromNodesLookup
 | 
						|
                        handleNodeAdded(curChild);
 | 
						|
                    }
 | 
						|
 | 
						|
                    curChild = nextSibling;
 | 
						|
                }
 | 
						|
            }
 | 
						|
 | 
						|
            function cleanupFromEl(fromEl, curFromNodeChild, curFromNodeKey) {
 | 
						|
                // We have processed all of the "to nodes". If curFromNodeChild is
 | 
						|
                // non-null then we still have some from nodes left over that need
 | 
						|
                // to be removed
 | 
						|
                while (curFromNodeChild) {
 | 
						|
                    var fromNextSibling = curFromNodeChild.nextSibling;
 | 
						|
                    if ((curFromNodeKey = getNodeKey(curFromNodeChild))) {
 | 
						|
                        // Since the node is keyed it might be matched up later so we defer
 | 
						|
                        // the actual removal to later
 | 
						|
                        addKeyedRemoval(curFromNodeKey);
 | 
						|
                    } else {
 | 
						|
                        // NOTE: we skip nested keyed nodes from being removed since there is
 | 
						|
                        //       still a chance they will be matched up later
 | 
						|
                        removeNode(curFromNodeChild, fromEl, true /* skip keyed nodes */);
 | 
						|
                    }
 | 
						|
                    curFromNodeChild = fromNextSibling;
 | 
						|
                }
 | 
						|
            }
 | 
						|
 | 
						|
            function morphEl(fromEl, toEl, childrenOnly) {
 | 
						|
                var toElKey = getNodeKey(toEl);
 | 
						|
 | 
						|
                if (toElKey) {
 | 
						|
                    // If an element with an ID is being morphed then it will be in the final
 | 
						|
                    // DOM so clear it out of the saved elements collection
 | 
						|
                    delete fromNodesLookup[toElKey];
 | 
						|
                }
 | 
						|
 | 
						|
                if (!childrenOnly) {
 | 
						|
                    // optional
 | 
						|
                    if (onBeforeElUpdated(fromEl, toEl) === false) {
 | 
						|
                        return;
 | 
						|
                    }
 | 
						|
 | 
						|
                    // update attributes on original DOM element first
 | 
						|
                    morphAttrs(fromEl, toEl);
 | 
						|
                    // optional
 | 
						|
                    onElUpdated(fromEl);
 | 
						|
 | 
						|
                    if (onBeforeElChildrenUpdated(fromEl, toEl) === false) {
 | 
						|
                        return;
 | 
						|
                    }
 | 
						|
                }
 | 
						|
 | 
						|
                if (fromEl.nodeName !== 'TEXTAREA') {
 | 
						|
                    morphChildren(fromEl, toEl);
 | 
						|
                } else {
 | 
						|
                    specialElHandlers.TEXTAREA(fromEl, toEl);
 | 
						|
                }
 | 
						|
            }
 | 
						|
 | 
						|
            function morphChildren(fromEl, toEl) {
 | 
						|
                var curToNodeChild = toEl.firstChild;
 | 
						|
                var curFromNodeChild = fromEl.firstChild;
 | 
						|
                var curToNodeKey;
 | 
						|
                var curFromNodeKey;
 | 
						|
 | 
						|
                var fromNextSibling;
 | 
						|
                var toNextSibling;
 | 
						|
                var matchingFromEl;
 | 
						|
 | 
						|
                // walk the children
 | 
						|
                outer: while (curToNodeChild) {
 | 
						|
                    toNextSibling = curToNodeChild.nextSibling;
 | 
						|
                    curToNodeKey = getNodeKey(curToNodeChild);
 | 
						|
 | 
						|
                    // walk the fromNode children all the way through
 | 
						|
                    while (curFromNodeChild) {
 | 
						|
                        fromNextSibling = curFromNodeChild.nextSibling;
 | 
						|
 | 
						|
                        if (curToNodeChild.isSameNode && curToNodeChild.isSameNode(curFromNodeChild)) {
 | 
						|
                            curToNodeChild = toNextSibling;
 | 
						|
                            curFromNodeChild = fromNextSibling;
 | 
						|
                            continue outer;
 | 
						|
                        }
 | 
						|
 | 
						|
                        curFromNodeKey = getNodeKey(curFromNodeChild);
 | 
						|
 | 
						|
                        var curFromNodeType = curFromNodeChild.nodeType;
 | 
						|
 | 
						|
                        // this means if the curFromNodeChild doesnt have a match with the curToNodeChild
 | 
						|
                        var isCompatible = undefined;
 | 
						|
 | 
						|
                        if (curFromNodeType === curToNodeChild.nodeType) {
 | 
						|
                            if (curFromNodeType === ELEMENT_NODE) {
 | 
						|
                                // Both nodes being compared are Element nodes
 | 
						|
 | 
						|
                                if (curToNodeKey) {
 | 
						|
                                    // The target node has a key so we want to match it up with the correct element
 | 
						|
                                    // in the original DOM tree
 | 
						|
                                    if (curToNodeKey !== curFromNodeKey) {
 | 
						|
                                        // The current element in the original DOM tree does not have a matching key so
 | 
						|
                                        // let's check our lookup to see if there is a matching element in the original
 | 
						|
                                        // DOM tree
 | 
						|
                                        if ((matchingFromEl = fromNodesLookup[curToNodeKey])) {
 | 
						|
                                            if (fromNextSibling === matchingFromEl) {
 | 
						|
                                                // Special case for single element removals. To avoid removing the original
 | 
						|
                                                // DOM node out of the tree (since that can break CSS transitions, etc.),
 | 
						|
                                                // we will instead discard the current node and wait until the next
 | 
						|
                                                // iteration to properly match up the keyed target element with its matching
 | 
						|
                                                // element in the original tree
 | 
						|
                                                isCompatible = false;
 | 
						|
                                            } else {
 | 
						|
                                                // We found a matching keyed element somewhere in the original DOM tree.
 | 
						|
                                                // Let's move the original DOM node into the current position and morph
 | 
						|
                                                // it.
 | 
						|
 | 
						|
                                                // NOTE: We use insertBefore instead of replaceChild because we want to go through
 | 
						|
                                                // the `removeNode()` function for the node that is being discarded so that
 | 
						|
                                                // all lifecycle hooks are correctly invoked
 | 
						|
                                                fromEl.insertBefore(matchingFromEl, curFromNodeChild);
 | 
						|
 | 
						|
                                                // fromNextSibling = curFromNodeChild.nextSibling;
 | 
						|
 | 
						|
                                                if (curFromNodeKey) {
 | 
						|
                                                    // Since the node is keyed it might be matched up later so we defer
 | 
						|
                                                    // the actual removal to later
 | 
						|
                                                    addKeyedRemoval(curFromNodeKey);
 | 
						|
                                                } else {
 | 
						|
                                                    // NOTE: we skip nested keyed nodes from being removed since there is
 | 
						|
                                                    //       still a chance they will be matched up later
 | 
						|
                                                    removeNode(curFromNodeChild, fromEl, true /* skip keyed nodes */);
 | 
						|
                                                }
 | 
						|
 | 
						|
                                                curFromNodeChild = matchingFromEl;
 | 
						|
                                            }
 | 
						|
                                        } else {
 | 
						|
                                            // The nodes are not compatible since the "to" node has a key and there
 | 
						|
                                            // is no matching keyed node in the source tree
 | 
						|
                                            isCompatible = false;
 | 
						|
                                        }
 | 
						|
                                    }
 | 
						|
                                } else if (curFromNodeKey) {
 | 
						|
                                    // The original has a key
 | 
						|
                                    isCompatible = false;
 | 
						|
                                }
 | 
						|
 | 
						|
                                isCompatible = isCompatible !== false && compareNodeNames(curFromNodeChild, curToNodeChild);
 | 
						|
                                if (isCompatible) {
 | 
						|
                                    // We found compatible DOM elements so transform
 | 
						|
                                    // the current "from" node to match the current
 | 
						|
                                    // target DOM node.
 | 
						|
                                    // MORPH
 | 
						|
                                    morphEl(curFromNodeChild, curToNodeChild);
 | 
						|
                                }
 | 
						|
 | 
						|
                            } else if (curFromNodeType === TEXT_NODE || curFromNodeType == COMMENT_NODE) {
 | 
						|
                                // Both nodes being compared are Text or Comment nodes
 | 
						|
                                isCompatible = true;
 | 
						|
                                // Simply update nodeValue on the original node to
 | 
						|
                                // change the text value
 | 
						|
                                if (curFromNodeChild.nodeValue !== curToNodeChild.nodeValue) {
 | 
						|
                                    curFromNodeChild.nodeValue = curToNodeChild.nodeValue;
 | 
						|
                                }
 | 
						|
 | 
						|
                            }
 | 
						|
                        }
 | 
						|
 | 
						|
                        if (isCompatible) {
 | 
						|
                            // Advance both the "to" child and the "from" child since we found a match
 | 
						|
                            // Nothing else to do as we already recursively called morphChildren above
 | 
						|
                            curToNodeChild = toNextSibling;
 | 
						|
                            curFromNodeChild = fromNextSibling;
 | 
						|
                            continue outer;
 | 
						|
                        }
 | 
						|
 | 
						|
                        // No compatible match so remove the old node from the DOM and continue trying to find a
 | 
						|
                        // match in the original DOM. However, we only do this if the from node is not keyed
 | 
						|
                        // since it is possible that a keyed node might match up with a node somewhere else in the
 | 
						|
                        // target tree and we don't want to discard it just yet since it still might find a
 | 
						|
                        // home in the final DOM tree. After everything is done we will remove any keyed nodes
 | 
						|
                        // that didn't find a home
 | 
						|
                        if (curFromNodeKey) {
 | 
						|
                            // Since the node is keyed it might be matched up later so we defer
 | 
						|
                            // the actual removal to later
 | 
						|
                            addKeyedRemoval(curFromNodeKey);
 | 
						|
                        } else {
 | 
						|
                            // NOTE: we skip nested keyed nodes from being removed since there is
 | 
						|
                            //       still a chance they will be matched up later
 | 
						|
                            removeNode(curFromNodeChild, fromEl, true /* skip keyed nodes */);
 | 
						|
                        }
 | 
						|
 | 
						|
                        curFromNodeChild = fromNextSibling;
 | 
						|
                    } // END: while(curFromNodeChild) {}
 | 
						|
 | 
						|
                    // If we got this far then we did not find a candidate match for
 | 
						|
                    // our "to node" and we exhausted all of the children "from"
 | 
						|
                    // nodes. Therefore, we will just append the current "to" node
 | 
						|
                    // to the end
 | 
						|
                    if (curToNodeKey && (matchingFromEl = fromNodesLookup[curToNodeKey]) && compareNodeNames(matchingFromEl, curToNodeChild)) {
 | 
						|
                        fromEl.appendChild(matchingFromEl);
 | 
						|
                        // MORPH
 | 
						|
                        morphEl(matchingFromEl, curToNodeChild);
 | 
						|
                    } else {
 | 
						|
                        var onBeforeNodeAddedResult = onBeforeNodeAdded(curToNodeChild);
 | 
						|
                        if (onBeforeNodeAddedResult !== false) {
 | 
						|
                            if (onBeforeNodeAddedResult) {
 | 
						|
                                curToNodeChild = onBeforeNodeAddedResult;
 | 
						|
                            }
 | 
						|
 | 
						|
                            if (curToNodeChild.actualize) {
 | 
						|
                                curToNodeChild = curToNodeChild.actualize(fromEl.ownerDocument || doc);
 | 
						|
                            }
 | 
						|
                            fromEl.appendChild(curToNodeChild);
 | 
						|
                            handleNodeAdded(curToNodeChild);
 | 
						|
                        }
 | 
						|
                    }
 | 
						|
 | 
						|
                    curToNodeChild = toNextSibling;
 | 
						|
                    curFromNodeChild = fromNextSibling;
 | 
						|
                }
 | 
						|
 | 
						|
                cleanupFromEl(fromEl, curFromNodeChild, curFromNodeKey);
 | 
						|
 | 
						|
                var specialElHandler = specialElHandlers[fromEl.nodeName];
 | 
						|
                if (specialElHandler) {
 | 
						|
                    specialElHandler(fromEl, toEl);
 | 
						|
                }
 | 
						|
            } // END: morphChildren(...)
 | 
						|
 | 
						|
            var morphedNode = fromNode;
 | 
						|
            var morphedNodeType = morphedNode.nodeType;
 | 
						|
            var toNodeType = toNode.nodeType;
 | 
						|
 | 
						|
            if (!childrenOnly) {
 | 
						|
                // Handle the case where we are given two DOM nodes that are not
 | 
						|
                // compatible (e.g. <div> --> <span> or <div> --> TEXT)
 | 
						|
                if (morphedNodeType === ELEMENT_NODE) {
 | 
						|
                    if (toNodeType === ELEMENT_NODE) {
 | 
						|
                        if (!compareNodeNames(fromNode, toNode)) {
 | 
						|
                            onNodeDiscarded(fromNode);
 | 
						|
                            morphedNode = moveChildren(fromNode, createElementNS(toNode.nodeName, toNode.namespaceURI));
 | 
						|
                        }
 | 
						|
                    } else {
 | 
						|
                        // Going from an element node to a text node
 | 
						|
                        morphedNode = toNode;
 | 
						|
                    }
 | 
						|
                } else if (morphedNodeType === TEXT_NODE || morphedNodeType === COMMENT_NODE) { // Text or comment node
 | 
						|
                    if (toNodeType === morphedNodeType) {
 | 
						|
                        if (morphedNode.nodeValue !== toNode.nodeValue) {
 | 
						|
                            morphedNode.nodeValue = toNode.nodeValue;
 | 
						|
                        }
 | 
						|
 | 
						|
                        return morphedNode;
 | 
						|
                    } else {
 | 
						|
                        // Text node to something else
 | 
						|
                        morphedNode = toNode;
 | 
						|
                    }
 | 
						|
                }
 | 
						|
            }
 | 
						|
 | 
						|
            if (morphedNode === toNode) {
 | 
						|
                // The "to node" was not compatible with the "from node" so we had to
 | 
						|
                // toss out the "from node" and use the "to node"
 | 
						|
                onNodeDiscarded(fromNode);
 | 
						|
            } else {
 | 
						|
                if (toNode.isSameNode && toNode.isSameNode(morphedNode)) {
 | 
						|
                    return;
 | 
						|
                }
 | 
						|
 | 
						|
                morphEl(morphedNode, toNode, childrenOnly);
 | 
						|
 | 
						|
                // We now need to loop over any keyed nodes that might need to be
 | 
						|
                // removed. We only do the removal if we know that the keyed node
 | 
						|
                // never found a match. When a keyed node is matched up we remove
 | 
						|
                // it out of fromNodesLookup and we use fromNodesLookup to determine
 | 
						|
                // if a keyed node has been matched up or not
 | 
						|
                if (keyedRemovalList) {
 | 
						|
                    for (var i=0, len=keyedRemovalList.length; i<len; i++) {
 | 
						|
                        var elToRemove = fromNodesLookup[keyedRemovalList[i]];
 | 
						|
                        if (elToRemove) {
 | 
						|
                            removeNode(elToRemove, elToRemove.parentNode, false);
 | 
						|
                        }
 | 
						|
                    }
 | 
						|
                }
 | 
						|
            }
 | 
						|
 | 
						|
            if (!childrenOnly && morphedNode !== fromNode && fromNode.parentNode) {
 | 
						|
                if (morphedNode.actualize) {
 | 
						|
                    morphedNode = morphedNode.actualize(fromNode.ownerDocument || doc);
 | 
						|
                }
 | 
						|
                // If we had to swap out the from node with a new node because the old
 | 
						|
                // node was not compatible with the target node then we need to
 | 
						|
                // replace the old DOM node in the original DOM tree. This is only
 | 
						|
                // possible if the original DOM node was part of a DOM tree which
 | 
						|
                // we know is the case if it has a parent node.
 | 
						|
                fromNode.parentNode.replaceChild(morphedNode, fromNode);
 | 
						|
            }
 | 
						|
 | 
						|
            return morphedNode;
 | 
						|
        };
 | 
						|
    }
 | 
						|
 | 
						|
    var morphdom = morphdomFactory(morphAttrs);
 | 
						|
 | 
						|
    return morphdom;
 | 
						|
 | 
						|
}));
 |