Actualización

plugin/mindmap/edit-mindmap/vendor/js/kampfer/data.js

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+/*global kampfer*/
+
+/**
+ * 为对象管理数据
+ * @module data
+ * https://github.com/jquery/jquery/blob/master/src/data.js
+ */
+
+kampfer.require('browser.support');
+
+kampfer.provide('data');
+
+//kampfer的数据缓存
+kampfer.data.cache = {};
+
+//用于标记缓存的id
+kampfer.data.cacheId = 0;
+
+//不能设置自定义属性的HTML tag名单
+kampfer.data.noData = {
+	"embed": true,
+	//object标签的clsid为以下值时可以设置自定义属性,
+	//其他情况object也不能设置自定义属性
+	"object": "clsid:D27CDB6E-AE6D-11cf-96B8-444553540000",
+	"applet": true
+};
+
+/*
+ * 判断对象是否能够设置自定义属性。所有plain object都能设置自定义属性，
+ * 而html dom中：embed/applet无法设置，obeject只有当clsid为特定值时可以设置。
+ * @param {object||html dom}elem
+ * @return {boolean}
+ */
+kampfer.data.acceptData = function(elem) {
+	if(kampfer.type(elem) === 'object') {
+		if(elem.nodeName) {
+			var match = kampfer.data.noData[ elem.nodeName.toLowerCase() ];
+			if( match ) {
+				return !(match === true || elem.getAttribute('classid') !== match);
+			}
+		}
+		return true;
+	}
+};
+
+/*
+ * 判断数据对象是否为空。必须区分两种情况：
+ * 1。用户的数据对象 所有用户的数据都储存在数据对象的data属性中。
+ * 2。kampfer的数据对象 kampfer的数据会被直接储存在数据对象中。
+ * @param {plain object}obj 这个对象一般取自kampfer.data.cache[expando]
+ *	或者elem[expando]
+ * @return {boolean}
+ */
+kampfer.data.isEmptyDataObj = function(obj) {
+	for(var name in obj) {
+		//检查用户定义的data（即cache.data）
+		if( name === 'data' && kampfer.isEmptyObject(obj[name]) ) {
+			continue;
+		}
+		if( name !== 'toJSON' ) {
+			return false;
+		}
+	}
+	return true;
+};
+
+//判断对象是否储存了数据。此方法先取到elem的数据对象，
+//再调用kampfer.data.isEmptyDataObj判断对象是否为空
+kampfer.data.hasData = function(elem) {
+	elem = elem.nodeType ? 
+		kampfer.data.cache[ elem[kampfer.expando] ] :
+		elem[kampfer.expando];
+	return !!elem && !kampfer.data.isEmptyDataObj(elem);
+};
+
+/*
+ * 写缓存. 只接受key-value形式的参数.
+ * @param {object||html dom}elem
+ * @param {string}name
+ * @param {*}value
+ * @param {boolean}internal
+ * @return
+ */
+kampfer.data.setData = function(elem, name, value, internal) {
+	if( !kampfer.data.acceptData(elem)　) {
+		return;
+	}
+
+	var expando = kampfer.expando,
+		isNode = !!elem.nodeType,
+		cache = isNode ? kampfer.data.cache : elem,
+		cacheId = isNode ? elem[expando] : elem[expando] && expando,
+		thisCache;
+
+	// 设置cacheId
+	if(!cacheId) {
+		if(isNode) {
+			elem[expando] = cacheId = ++kampfer.data.cacheId;
+		} else {
+			cacheId = expando;
+		}
+	}
+
+	// 取得cache object
+	if(!cache[cacheId]) {
+		cache[cacheId] = {};
+	}
+	thisCache = cache[cacheId];
+	// 区分内部调用和客户调用时数据的储存位置
+	if(!internal) {
+		if(!thisCache.data) {
+			thisCache.data = {};
+		}
+		thisCache = thisCache.data;
+	}
+	
+	// 不做判断，直接覆盖旧值
+	if(kampfer.type(name) === 'object') {
+		thisCache = kampfer.extend(thisCache, name);
+	} else if(value !== undefined) {
+		thisCache[name] = value;
+	}
+
+	return thisCache;
+};
+
+/*
+ * 读缓存。如果不提供name,直接返回整个cache。
+ * @param {object||html dom}elem
+ * @param {string}name option
+ * @param {boolean}internal option
+ * @return {*}
+ */
+kampfer.data.getData = function(elem, name, internal) {
+	if( !kampfer.data.acceptData(elem) ) {
+		return;
+	}
+
+	var expando = kampfer.expando,
+		isNode = !!elem.nodeType,
+		cache = isNode ? kampfer.data.cache : elem,
+		cacheId = isNode ? elem[expando] : elem[expando] && expando,
+		hasName = kampfer.type(name) !== 'boolean' && name !== undefined,
+		thisCache, ret;
+
+	if(!cacheId || !cache[cacheId]) {
+		return;
+	}
+
+	if(!hasName) {
+		internal = name;
+	}
+
+	thisCache = cache[cacheId];
+	if(!internal) {
+		thisCache = thisCache.data || {};
+	}
+
+	if(hasName) {
+		ret = thisCache[name];
+	} else {
+		ret = thisCache;
+	}
+
+	return ret;
+};
+
+/*
+ * 删除缓存。如果不提供name,不执行任何操作。
+ * @param {object||html dom}elem
+ * @param {string}name
+ * @param {boolean}internal option
+ * @return void
+ */
+kampfer.data.removeData = function(elem, name, internal) {
+	if( !kampfer.data.acceptData(elem) ) {
+		return;
+	}
+
+	var expando = kampfer.expando,
+		isNode = !!elem.nodeType,
+		cache = isNode ? kampfer.data.cache : elem,
+		cacheId = isNode ? elem[expando] : elem[expando] && expando,
+		hasName = kampfer.type(name) !== 'bool' && name !== undefined,
+		thisCache;
+
+	if(!cacheId || !cache[cacheId] ||!hasName) {
+		return;
+	}
+
+	thisCache = cache[cacheId];
+	if(!internal) {
+		thisCache = thisCache.data;
+	}
+
+	if(thisCache) {
+		if(kampfer.type(name) !== 'array') {
+			if(name in thisCache) {
+				name = [name];
+			}
+		}
+		for(var i = 0, n; n = name[i]; i++) {
+			delete thisCache[n];
+		}
+		if( !kampfer.data.isEmptyDataObj(thisCache) ) {
+			return;
+		}
+	}
+
+	if(!internal) {
+		delete cache[cacheId].data;
+		if( !kampfer.data.isEmptyDataObj( cache[cacheId] ) ) {
+			return;
+		}
+	}
+
+
+	// 清空数据cache
+	// as window.nodeType === undefined, so when elem === window isNode === false
+	if ( kampfer.browser.support.deleteExpando || !cache.setInterval ) {
+		delete cache[cacheId];
+	} else {
+		cache[cacheId] = null;
+	}
+
+	// 清除html dom的expando
+	if(isNode) {
+		// IE does not allow us to delete expando properties from nodes,
+		// nor does it have a removeAttribute function on Document nodes;
+		// we must handle all of these cases
+		if ( kampfer.browser.support.deleteExpando ) {
+			delete elem[ expando ];
+		} else if ( elem.removeAttribute ) {
+			elem.removeAttribute( expando );
+		} else {
+			elem[ expando ] = null;
+		}
+	}
+};
+
+
+//kampfer内部调用
+kampfer.data.setDataInternal = function(elem, name, value) {
+	kampfer.data.setData(elem, name, value, true);
+};
+
+//kampfer内部调用
+kampfer.data.getDataInternal = function(elem, name) {
+	return kampfer.data.getData(elem, name, true);
+};
+
+//kampfer内部调用
+kampfer.data.removeDataInternal = function(elem, name) {
+	kampfer.data.removeData(elem, name, true);
+};