Actualización

plugin/mindmap/edit-mindmap/vendor/js/composition.js

@@ -0,0 +1,197 @@
+/*global kampfer*/
+kampfer.require('events.EventTarget');
+
+kampfer.provide('Composition');
+
+/**
+ * 实现一个composition模式的类，用于组织对象，协调对象的关系。
+ * 涉及parent的方法(get,set)只会影响到实例对象本身，而涉及child的方法不仅会影响对象自己，
+ * 还会影响child实例对象。所以请使用child相关方法维护对象间的组织关系。
+ */
+kampfer.Composition = kampfer.events.EventTarget.extend({
+	
+	//initializer : function() {},
+	
+	//Composition实例
+	_parent : null,
+	
+	//对象，每一项都应该是Composition实例
+	_children : null,
+	
+	_childrenCount : 0,
+	
+	_id : null,
+	
+	setId : function(id) {
+		var oldId = this._id;
+		
+		this._id = id;
+		
+		if(this._parent && this._parent._children) {
+			//this._parent._children[oldId] = null;
+			delete _parent._children[oldId];
+			this._parent.addChild(this);
+		}
+	},
+	
+	getId : function() {
+		return this._id || ( this._id = this.generateUniqueId() );
+	},
+	
+	/**
+	 * 设置父对象。不能将parent设置为composition自己。
+	 * 以下情况setParent将抛出异常：
+	 * 1. parent非null但不是一个composition实例
+	 * 2. 尝试将parent设置为composition自己
+	 * 3. parent非null且composition已经拥有了一个_parent且_parent!=parent
+	 * @param	{kampfer.mindMap.Composition}parent
+	 */
+	setParent : function(parent) {
+		if( parent && !(parent instanceof kampfer.Composition) ) {
+			throw('parent is not instanceof composition');
+		}
+		
+		if( parent === this ) {
+			throw('parent cant be composition itself');
+		}
+		
+		//如果parent已经存在
+		if( parent && this._parent && this._parent !== parent ) {
+			throw('parent already exist');
+		}
+		
+		this.setParentEventTarget(parent);
+		this._parent = parent;
+
+		if( parent && !parent.getChild(this._id) ) {
+			parent.addChild(this);
+		}
+	},
+	
+	getParent : function() {
+		return this._parent;
+	},
+	
+	/**
+	 * 添加子对象。
+	 * @param {kampfer.mindMap.Composition} child
+	 */
+	addChild : function(child) {
+		
+		if( !(child instanceof kampfer.Composition) ) {
+			throw('wrong type param');
+		}
+		
+		var id = child.getId();
+	
+		if(!this._children) {
+			this._children = {};
+		}
+		
+		if(!this._children[id]) {
+			this._children[id] = child;
+			this._childrenCount++;
+		}else{
+			throw('can not add child');
+		}
+		
+		if(child._parent !== this) {
+			child.setParent(this);
+		}
+	},
+	
+	/**
+	 * 删除子对象
+	 * @param {string|kampfer.mindMap.Composition} child
+	 */
+	removeChild : function(child) {
+		if(child) {
+			var id, type = kampfer.type(child);
+			
+			if(type === 'string') {
+				id = child;
+				child = this.getChild(id);
+			} else if(type === 'object') {
+				if( !(child instanceof kampfer.Composition) ) {
+					throw('wrong type param');
+				}
+				id = child.getId();
+			}
+			
+			if(id && (id in this._children)) {
+				//this._children[id] = null;
+				delete this._children[id];
+				this._childrenCount--;
+				child.setParent(null);
+			}
+			
+			if( this.hasNoChild() ) {
+				//this._children = null;
+				delete this._children;
+			}
+		}
+		
+		return child;
+	},
+	
+	getChild : function(id) {
+		var node;
+		
+		this.eachChild(function(child, cid) {
+			if(cid === id) {
+				node = child;
+				return false;
+			}else {
+				child.eachChild(arguments.callee);
+			}
+		});
+
+		return node;
+	},
+	
+	//fn(child, id)
+	eachChild : function(fn, context) {
+		if(this._children) {
+			for(var id in this._children) {
+				if( this._children[id] && fn.call( context, this._children[id], id ) === false ) {
+					return;
+				}
+			}
+		}
+	},
+	
+	getChildrenCount : function() {
+		return this._childrenCount;
+	},
+	
+	hasNoChild : function() {
+		if(this._childrenCount === 0) {
+			return true;
+		}
+		return false;
+	},
+	
+	/*
+	 * 生成唯一id
+	 * 直接使用时间戳不可行
+	 * 以下方法摘自http://www.cnblogs.com/NoRoad/archive/2010/03/12/1684759.html
+	 */
+	generateUniqueId : function() {
+		var guid = "";
+		for(var i = 1; i <= 32; i++) {
+			var n = Math.floor(Math.random() * 16.0).toString(16);
+			guid += n;
+			if((i == 8) || (i == 12) || (i == 16) || (i == 20)) {
+				guid += "-";
+			}
+		}
+		return guid;
+	},
+	
+	dispose : function() {
+		kampfer.Composition.superClass.dispose.apply(this);
+		this._parent = null;
+		this._children = null;
+	}
+	
+});