773 lines
30 KiB
JavaScript
773 lines
30 KiB
JavaScript
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(function (global, factory) {
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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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// 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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// 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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if (attrNamespaceURI) {
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attrName = attr.localName || attrName;
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fromValue = fromNode.getAttributeNS(attrNamespaceURI, attrName);
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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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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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if (attrNamespaceURI) {
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attrName = attr.localName || attrName;
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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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}
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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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*/
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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) {
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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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if (fromNodeName === toNodeName) {
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return true;
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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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* 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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* 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
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* 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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TEXTAREA: function(fromEl, toEl) {
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var newValue = toEl.value;
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if (fromEl.value !== newValue) {
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fromEl.value = newValue;
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}
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var firstChild = fromEl.firstChild;
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if (firstChild) {
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// Needed for IE. Apparently IE sets the placeholder as the
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// node value and vise versa. This ignores an empty update.
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var oldValue = firstChild.nodeValue;
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if (oldValue == newValue || (!newValue && oldValue == fromEl.placeholder)) {
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return;
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}
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firstChild.nodeValue = newValue;
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}
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},
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SELECT: function(fromEl, toEl) {
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if (!toEl.hasAttribute('multiple')) {
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var selectedIndex = -1;
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var i = 0;
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// 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.
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// 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.
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var curChild = fromEl.firstChild;
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var optgroup;
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var nodeName;
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while(curChild) {
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nodeName = curChild.nodeName && curChild.nodeName.toUpperCase();
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if (nodeName === 'OPTGROUP') {
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optgroup = curChild;
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curChild = optgroup.firstChild;
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} else {
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if (nodeName === 'OPTION') {
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if (curChild.hasAttribute('selected')) {
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selectedIndex = i;
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break;
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}
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i++;
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}
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curChild = curChild.nextSibling;
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if (!curChild && optgroup) {
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curChild = optgroup.nextSibling;
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optgroup = null;
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}
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}
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}
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fromEl.selectedIndex = selectedIndex;
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}
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}
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};
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var ELEMENT_NODE = 1;
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var DOCUMENT_FRAGMENT_NODE$1 = 11;
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var TEXT_NODE = 3;
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var COMMENT_NODE = 8;
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function noop() {}
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function defaultGetNodeKey(node) {
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if (node) {
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return (node.getAttribute && node.getAttribute('id')) || node.id;
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}
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}
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function morphdomFactory(morphAttrs) {
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return function morphdom(fromNode, toNode, options) {
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if (!options) {
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options = {};
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}
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if (typeof toNode === 'string') {
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if (fromNode.nodeName === '#document' || fromNode.nodeName === 'HTML' || fromNode.nodeName === 'BODY') {
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var toNodeHtml = toNode;
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toNode = doc.createElement('html');
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toNode.innerHTML = toNodeHtml;
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} else {
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toNode = toElement(toNode);
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}
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} else if (toNode.nodeType === DOCUMENT_FRAGMENT_NODE$1) {
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toNode = toNode.firstElementChild;
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}
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var getNodeKey = options.getNodeKey || defaultGetNodeKey;
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var onBeforeNodeAdded = options.onBeforeNodeAdded || noop;
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var onNodeAdded = options.onNodeAdded || noop;
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var onBeforeElUpdated = options.onBeforeElUpdated || noop;
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var onElUpdated = options.onElUpdated || noop;
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var onBeforeNodeDiscarded = options.onBeforeNodeDiscarded || noop;
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var onNodeDiscarded = options.onNodeDiscarded || noop;
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var onBeforeElChildrenUpdated = options.onBeforeElChildrenUpdated || noop;
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var skipFromChildren = options.skipFromChildren || noop;
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var addChild = options.addChild || function(parent, child){ return parent.appendChild(child); };
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var childrenOnly = options.childrenOnly === true;
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// This object is used as a lookup to quickly find all keyed elements in the original DOM tree.
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var fromNodesLookup = Object.create(null);
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var keyedRemovalList = [];
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function addKeyedRemoval(key) {
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keyedRemovalList.push(key);
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}
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function walkDiscardedChildNodes(node, skipKeyedNodes) {
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if (node.nodeType === ELEMENT_NODE) {
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var curChild = node.firstChild;
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while (curChild) {
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var key = undefined;
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if (skipKeyedNodes && (key = getNodeKey(curChild))) {
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// If we are skipping keyed nodes then we add the key
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// to a list so that it can be handled at the very end.
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addKeyedRemoval(key);
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} else {
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// Only report the node as discarded if it is not keyed. We do this because
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// at the end we loop through all keyed elements that were unmatched
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// and then discard them in one final pass.
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onNodeDiscarded(curChild);
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if (curChild.firstChild) {
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walkDiscardedChildNodes(curChild, skipKeyedNodes);
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}
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}
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curChild = curChild.nextSibling;
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}
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}
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}
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/**
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* Removes a DOM node out of the original DOM
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*
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* @param {Node} node The node to remove
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* @param {Node} parentNode The nodes parent
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|
|
* @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
|
||
|
|
var beforeUpdateResult = onBeforeElUpdated(fromEl, toEl);
|
||
|
|
if (beforeUpdateResult === false) {
|
||
|
|
return;
|
||
|
|
} else if (beforeUpdateResult instanceof HTMLElement) {
|
||
|
|
fromEl = beforeUpdateResult;
|
||
|
|
}
|
||
|
|
|
||
|
|
// 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 skipFrom = skipFromChildren(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 (!skipFrom && 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;
|
||
|
|
curFromNodeKey = getNodeKey(curFromNodeChild);
|
||
|
|
}
|
||
|
|
} 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)) {
|
||
|
|
// MORPH
|
||
|
|
if(!skipFrom){ addChild(fromEl, matchingFromEl); }
|
||
|
|
morphEl(matchingFromEl, curToNodeChild);
|
||
|
|
} else {
|
||
|
|
var onBeforeNodeAddedResult = onBeforeNodeAdded(curToNodeChild);
|
||
|
|
if (onBeforeNodeAddedResult !== false) {
|
||
|
|
if (onBeforeNodeAddedResult) {
|
||
|
|
curToNodeChild = onBeforeNodeAddedResult;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (curToNodeChild.actualize) {
|
||
|
|
curToNodeChild = curToNodeChild.actualize(fromEl.ownerDocument || doc);
|
||
|
|
}
|
||
|
|
addChild(fromEl, 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;
|
||
|
|
|
||
|
|
}));
|