X-Git-Url: http://git.ithinksw.org/extjs.git/blobdiff_plain/ee06f37b0f6f6d94cd05a6ffae556660f7c4a2bc..c930e9176a5a85509c5b0230e2bff5c22a591432:/src/data/Tree.js
diff --git a/src/data/Tree.js b/src/data/Tree.js
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+/*!
+ * Ext JS Library 3.0.0
+ * Copyright(c) 2006-2009 Ext JS, LLC
+ * licensing@extjs.com
+ * http://www.extjs.com/license
+ */
+/**
+ * @class Ext.data.Tree
+ * @extends Ext.util.Observable
+ * Represents a tree data structure and bubbles all the events for its nodes. The nodes
+ * in the tree have most standard DOM functionality.
+ * @constructor
+ * @param {Node} root (optional) The root node
+ */
+Ext.data.Tree = function(root){
+ this.nodeHash = {};
+ /**
+ * The root node for this tree
+ * @type Node
+ */
+ this.root = null;
+ if(root){
+ this.setRootNode(root);
+ }
+ this.addEvents(
+ /**
+ * @event append
+ * Fires when a new child node is appended to a node in this tree.
+ * @param {Tree} tree The owner tree
+ * @param {Node} parent The parent node
+ * @param {Node} node The newly appended node
+ * @param {Number} index The index of the newly appended node
+ */
+ "append",
+ /**
+ * @event remove
+ * Fires when a child node is removed from a node in this tree.
+ * @param {Tree} tree The owner tree
+ * @param {Node} parent The parent node
+ * @param {Node} node The child node removed
+ */
+ "remove",
+ /**
+ * @event move
+ * Fires when a node is moved to a new location in the tree
+ * @param {Tree} tree The owner tree
+ * @param {Node} node The node moved
+ * @param {Node} oldParent The old parent of this node
+ * @param {Node} newParent The new parent of this node
+ * @param {Number} index The index it was moved to
+ */
+ "move",
+ /**
+ * @event insert
+ * Fires when a new child node is inserted in a node in this tree.
+ * @param {Tree} tree The owner tree
+ * @param {Node} parent The parent node
+ * @param {Node} node The child node inserted
+ * @param {Node} refNode The child node the node was inserted before
+ */
+ "insert",
+ /**
+ * @event beforeappend
+ * Fires before a new child is appended to a node in this tree, return false to cancel the append.
+ * @param {Tree} tree The owner tree
+ * @param {Node} parent The parent node
+ * @param {Node} node The child node to be appended
+ */
+ "beforeappend",
+ /**
+ * @event beforeremove
+ * Fires before a child is removed from a node in this tree, return false to cancel the remove.
+ * @param {Tree} tree The owner tree
+ * @param {Node} parent The parent node
+ * @param {Node} node The child node to be removed
+ */
+ "beforeremove",
+ /**
+ * @event beforemove
+ * Fires before a node is moved to a new location in the tree. Return false to cancel the move.
+ * @param {Tree} tree The owner tree
+ * @param {Node} node The node being moved
+ * @param {Node} oldParent The parent of the node
+ * @param {Node} newParent The new parent the node is moving to
+ * @param {Number} index The index it is being moved to
+ */
+ "beforemove",
+ /**
+ * @event beforeinsert
+ * Fires before a new child is inserted in a node in this tree, return false to cancel the insert.
+ * @param {Tree} tree The owner tree
+ * @param {Node} parent The parent node
+ * @param {Node} node The child node to be inserted
+ * @param {Node} refNode The child node the node is being inserted before
+ */
+ "beforeinsert"
+ );
+
+ Ext.data.Tree.superclass.constructor.call(this);
+};
+
+Ext.extend(Ext.data.Tree, Ext.util.Observable, {
+ /**
+ * @cfg {String} pathSeparator
+ * The token used to separate paths in node ids (defaults to '/').
+ */
+ pathSeparator: "/",
+
+ // private
+ proxyNodeEvent : function(){
+ return this.fireEvent.apply(this, arguments);
+ },
+
+ /**
+ * Returns the root node for this tree.
+ * @return {Node}
+ */
+ getRootNode : function(){
+ return this.root;
+ },
+
+ /**
+ * Sets the root node for this tree.
+ * @param {Node} node
+ * @return {Node}
+ */
+ setRootNode : function(node){
+ this.root = node;
+ node.ownerTree = this;
+ node.isRoot = true;
+ this.registerNode(node);
+ return node;
+ },
+
+ /**
+ * Gets a node in this tree by its id.
+ * @param {String} id
+ * @return {Node}
+ */
+ getNodeById : function(id){
+ return this.nodeHash[id];
+ },
+
+ // private
+ registerNode : function(node){
+ this.nodeHash[node.id] = node;
+ },
+
+ // private
+ unregisterNode : function(node){
+ delete this.nodeHash[node.id];
+ },
+
+ toString : function(){
+ return "[Tree"+(this.id?" "+this.id:"")+"]";
+ }
+});
+
+/**
+ * @class Ext.data.Node
+ * @extends Ext.util.Observable
+ * @cfg {Boolean} leaf true if this node is a leaf and does not have children
+ * @cfg {String} id The id for this node. If one is not specified, one is generated.
+ * @constructor
+ * @param {Object} attributes The attributes/config for the node
+ */
+Ext.data.Node = function(attributes){
+ /**
+ * The attributes supplied for the node. You can use this property to access any custom attributes you supplied.
+ * @type {Object}
+ */
+ this.attributes = attributes || {};
+ this.leaf = this.attributes.leaf;
+ /**
+ * The node id. @type String
+ */
+ this.id = this.attributes.id;
+ if(!this.id){
+ this.id = Ext.id(null, "xnode-");
+ this.attributes.id = this.id;
+ }
+ /**
+ * All child nodes of this node. @type Array
+ */
+ this.childNodes = [];
+ if(!this.childNodes.indexOf){ // indexOf is a must
+ this.childNodes.indexOf = function(o){
+ for(var i = 0, len = this.length; i < len; i++){
+ if(this[i] == o){
+ return i;
+ }
+ }
+ return -1;
+ };
+ }
+ /**
+ * The parent node for this node. @type Node
+ */
+ this.parentNode = null;
+ /**
+ * The first direct child node of this node, or null if this node has no child nodes. @type Node
+ */
+ this.firstChild = null;
+ /**
+ * The last direct child node of this node, or null if this node has no child nodes. @type Node
+ */
+ this.lastChild = null;
+ /**
+ * The node immediately preceding this node in the tree, or null if there is no sibling node. @type Node
+ */
+ this.previousSibling = null;
+ /**
+ * The node immediately following this node in the tree, or null if there is no sibling node. @type Node
+ */
+ this.nextSibling = null;
+
+ this.addEvents({
+ /**
+ * @event append
+ * Fires when a new child node is appended
+ * @param {Tree} tree The owner tree
+ * @param {Node} this This node
+ * @param {Node} node The newly appended node
+ * @param {Number} index The index of the newly appended node
+ */
+ "append" : true,
+ /**
+ * @event remove
+ * Fires when a child node is removed
+ * @param {Tree} tree The owner tree
+ * @param {Node} this This node
+ * @param {Node} node The removed node
+ */
+ "remove" : true,
+ /**
+ * @event move
+ * Fires when this node is moved to a new location in the tree
+ * @param {Tree} tree The owner tree
+ * @param {Node} this This node
+ * @param {Node} oldParent The old parent of this node
+ * @param {Node} newParent The new parent of this node
+ * @param {Number} index The index it was moved to
+ */
+ "move" : true,
+ /**
+ * @event insert
+ * Fires when a new child node is inserted.
+ * @param {Tree} tree The owner tree
+ * @param {Node} this This node
+ * @param {Node} node The child node inserted
+ * @param {Node} refNode The child node the node was inserted before
+ */
+ "insert" : true,
+ /**
+ * @event beforeappend
+ * Fires before a new child is appended, return false to cancel the append.
+ * @param {Tree} tree The owner tree
+ * @param {Node} this This node
+ * @param {Node} node The child node to be appended
+ */
+ "beforeappend" : true,
+ /**
+ * @event beforeremove
+ * Fires before a child is removed, return false to cancel the remove.
+ * @param {Tree} tree The owner tree
+ * @param {Node} this This node
+ * @param {Node} node The child node to be removed
+ */
+ "beforeremove" : true,
+ /**
+ * @event beforemove
+ * Fires before this node is moved to a new location in the tree. Return false to cancel the move.
+ * @param {Tree} tree The owner tree
+ * @param {Node} this This node
+ * @param {Node} oldParent The parent of this node
+ * @param {Node} newParent The new parent this node is moving to
+ * @param {Number} index The index it is being moved to
+ */
+ "beforemove" : true,
+ /**
+ * @event beforeinsert
+ * Fires before a new child is inserted, return false to cancel the insert.
+ * @param {Tree} tree The owner tree
+ * @param {Node} this This node
+ * @param {Node} node The child node to be inserted
+ * @param {Node} refNode The child node the node is being inserted before
+ */
+ "beforeinsert" : true
+ });
+ this.listeners = this.attributes.listeners;
+ Ext.data.Node.superclass.constructor.call(this);
+};
+
+Ext.extend(Ext.data.Node, Ext.util.Observable, {
+ // private
+ fireEvent : function(evtName){
+ // first do standard event for this node
+ if(Ext.data.Node.superclass.fireEvent.apply(this, arguments) === false){
+ return false;
+ }
+ // then bubble it up to the tree if the event wasn't cancelled
+ var ot = this.getOwnerTree();
+ if(ot){
+ if(ot.proxyNodeEvent.apply(ot, arguments) === false){
+ return false;
+ }
+ }
+ return true;
+ },
+
+ /**
+ * Returns true if this node is a leaf
+ * @return {Boolean}
+ */
+ isLeaf : function(){
+ return this.leaf === true;
+ },
+
+ // private
+ setFirstChild : function(node){
+ this.firstChild = node;
+ },
+
+ //private
+ setLastChild : function(node){
+ this.lastChild = node;
+ },
+
+
+ /**
+ * Returns true if this node is the last child of its parent
+ * @return {Boolean}
+ */
+ isLast : function(){
+ return (!this.parentNode ? true : this.parentNode.lastChild == this);
+ },
+
+ /**
+ * Returns true if this node is the first child of its parent
+ * @return {Boolean}
+ */
+ isFirst : function(){
+ return (!this.parentNode ? true : this.parentNode.firstChild == this);
+ },
+
+ /**
+ * Returns true if this node has one or more child nodes, else false.
+ * @return {Boolean}
+ */
+ hasChildNodes : function(){
+ return !this.isLeaf() && this.childNodes.length > 0;
+ },
+
+ /**
+ * Returns true if this node has one or more child nodes, or if the expandable
+ * node attribute is explicitly specified as true (see {@link #attributes}), otherwise returns false.
+ * @return {Boolean}
+ */
+ isExpandable : function(){
+ return this.attributes.expandable || this.hasChildNodes();
+ },
+
+ /**
+ * Insert node(s) as the last child node of this node.
+ * @param {Node/Array} node The node or Array of nodes to append
+ * @return {Node} The appended node if single append, or null if an array was passed
+ */
+ appendChild : function(node){
+ var multi = false;
+ if(Ext.isArray(node)){
+ multi = node;
+ }else if(arguments.length > 1){
+ multi = arguments;
+ }
+ // if passed an array or multiple args do them one by one
+ if(multi){
+ for(var i = 0, len = multi.length; i < len; i++) {
+ this.appendChild(multi[i]);
+ }
+ }else{
+ if(this.fireEvent("beforeappend", this.ownerTree, this, node) === false){
+ return false;
+ }
+ var index = this.childNodes.length;
+ var oldParent = node.parentNode;
+ // it's a move, make sure we move it cleanly
+ if(oldParent){
+ if(node.fireEvent("beforemove", node.getOwnerTree(), node, oldParent, this, index) === false){
+ return false;
+ }
+ oldParent.removeChild(node);
+ }
+ index = this.childNodes.length;
+ if(index === 0){
+ this.setFirstChild(node);
+ }
+ this.childNodes.push(node);
+ node.parentNode = this;
+ var ps = this.childNodes[index-1];
+ if(ps){
+ node.previousSibling = ps;
+ ps.nextSibling = node;
+ }else{
+ node.previousSibling = null;
+ }
+ node.nextSibling = null;
+ this.setLastChild(node);
+ node.setOwnerTree(this.getOwnerTree());
+ this.fireEvent("append", this.ownerTree, this, node, index);
+ if(oldParent){
+ node.fireEvent("move", this.ownerTree, node, oldParent, this, index);
+ }
+ return node;
+ }
+ },
+
+ /**
+ * Removes a child node from this node.
+ * @param {Node} node The node to remove
+ * @return {Node} The removed node
+ */
+ removeChild : function(node){
+ var index = this.childNodes.indexOf(node);
+ if(index == -1){
+ return false;
+ }
+ if(this.fireEvent("beforeremove", this.ownerTree, this, node) === false){
+ return false;
+ }
+
+ // remove it from childNodes collection
+ this.childNodes.splice(index, 1);
+
+ // update siblings
+ if(node.previousSibling){
+ node.previousSibling.nextSibling = node.nextSibling;
+ }
+ if(node.nextSibling){
+ node.nextSibling.previousSibling = node.previousSibling;
+ }
+
+ // update child refs
+ if(this.firstChild == node){
+ this.setFirstChild(node.nextSibling);
+ }
+ if(this.lastChild == node){
+ this.setLastChild(node.previousSibling);
+ }
+
+ node.setOwnerTree(null);
+ // clear any references from the node
+ node.parentNode = null;
+ node.previousSibling = null;
+ node.nextSibling = null;
+ this.fireEvent("remove", this.ownerTree, this, node);
+ return node;
+ },
+
+ /**
+ * Inserts the first node before the second node in this nodes childNodes collection.
+ * @param {Node} node The node to insert
+ * @param {Node} refNode The node to insert before (if null the node is appended)
+ * @return {Node} The inserted node
+ */
+ insertBefore : function(node, refNode){
+ if(!refNode){ // like standard Dom, refNode can be null for append
+ return this.appendChild(node);
+ }
+ // nothing to do
+ if(node == refNode){
+ return false;
+ }
+
+ if(this.fireEvent("beforeinsert", this.ownerTree, this, node, refNode) === false){
+ return false;
+ }
+ var index = this.childNodes.indexOf(refNode);
+ var oldParent = node.parentNode;
+ var refIndex = index;
+
+ // when moving internally, indexes will change after remove
+ if(oldParent == this && this.childNodes.indexOf(node) < index){
+ refIndex--;
+ }
+
+ // it's a move, make sure we move it cleanly
+ if(oldParent){
+ if(node.fireEvent("beforemove", node.getOwnerTree(), node, oldParent, this, index, refNode) === false){
+ return false;
+ }
+ oldParent.removeChild(node);
+ }
+ if(refIndex === 0){
+ this.setFirstChild(node);
+ }
+ this.childNodes.splice(refIndex, 0, node);
+ node.parentNode = this;
+ var ps = this.childNodes[refIndex-1];
+ if(ps){
+ node.previousSibling = ps;
+ ps.nextSibling = node;
+ }else{
+ node.previousSibling = null;
+ }
+ node.nextSibling = refNode;
+ refNode.previousSibling = node;
+ node.setOwnerTree(this.getOwnerTree());
+ this.fireEvent("insert", this.ownerTree, this, node, refNode);
+ if(oldParent){
+ node.fireEvent("move", this.ownerTree, node, oldParent, this, refIndex, refNode);
+ }
+ return node;
+ },
+
+ /**
+ * Removes this node from its parent
+ * @return {Node} this
+ */
+ remove : function(){
+ this.parentNode.removeChild(this);
+ return this;
+ },
+
+ /**
+ * Returns the child node at the specified index.
+ * @param {Number} index
+ * @return {Node}
+ */
+ item : function(index){
+ return this.childNodes[index];
+ },
+
+ /**
+ * Replaces one child node in this node with another.
+ * @param {Node} newChild The replacement node
+ * @param {Node} oldChild The node to replace
+ * @return {Node} The replaced node
+ */
+ replaceChild : function(newChild, oldChild){
+ var s = oldChild ? oldChild.nextSibling : null;
+ this.removeChild(oldChild);
+ this.insertBefore(newChild, s);
+ return oldChild;
+ },
+
+ /**
+ * Returns the index of a child node
+ * @param {Node} node
+ * @return {Number} The index of the node or -1 if it was not found
+ */
+ indexOf : function(child){
+ return this.childNodes.indexOf(child);
+ },
+
+ /**
+ * Returns the tree this node is in.
+ * @return {Tree}
+ */
+ getOwnerTree : function(){
+ // if it doesn't have one, look for one
+ if(!this.ownerTree){
+ var p = this;
+ while(p){
+ if(p.ownerTree){
+ this.ownerTree = p.ownerTree;
+ break;
+ }
+ p = p.parentNode;
+ }
+ }
+ return this.ownerTree;
+ },
+
+ /**
+ * Returns depth of this node (the root node has a depth of 0)
+ * @return {Number}
+ */
+ getDepth : function(){
+ var depth = 0;
+ var p = this;
+ while(p.parentNode){
+ ++depth;
+ p = p.parentNode;
+ }
+ return depth;
+ },
+
+ // private
+ setOwnerTree : function(tree){
+ // if it is a move, we need to update everyone
+ if(tree != this.ownerTree){
+ if(this.ownerTree){
+ this.ownerTree.unregisterNode(this);
+ }
+ this.ownerTree = tree;
+ var cs = this.childNodes;
+ for(var i = 0, len = cs.length; i < len; i++) {
+ cs[i].setOwnerTree(tree);
+ }
+ if(tree){
+ tree.registerNode(this);
+ }
+ }
+ },
+
+ /**
+ * Changes the id of this node.
+ * @param {String} id The new id for the node.
+ */
+ setId: function(id){
+ if(id !== this.id){
+ var t = this.ownerTree;
+ if(t){
+ t.unregisterNode(this);
+ }
+ this.id = id;
+ if(t){
+ t.registerNode(this);
+ }
+ this.onIdChange(id);
+ }
+ },
+
+ // private
+ onIdChange: Ext.emptyFn,
+
+ /**
+ * Returns the path for this node. The path can be used to expand or select this node programmatically.
+ * @param {String} attr (optional) The attr to use for the path (defaults to the node's id)
+ * @return {String} The path
+ */
+ getPath : function(attr){
+ attr = attr || "id";
+ var p = this.parentNode;
+ var b = [this.attributes[attr]];
+ while(p){
+ b.unshift(p.attributes[attr]);
+ p = p.parentNode;
+ }
+ var sep = this.getOwnerTree().pathSeparator;
+ return sep + b.join(sep);
+ },
+
+ /**
+ * Bubbles up the tree from this node, calling the specified function with each node. The scope (this) of
+ * function call will be the scope provided or the current node. The arguments to the function
+ * will be the args provided or the current node. If the function returns false at any point,
+ * the bubble is stopped.
+ * @param {Function} fn The function to call
+ * @param {Object} scope (optional) The scope of the function (defaults to current node)
+ * @param {Array} args (optional) The args to call the function with (default to passing the current node)
+ */
+ bubble : function(fn, scope, args){
+ var p = this;
+ while(p){
+ if(fn.apply(scope || p, args || [p]) === false){
+ break;
+ }
+ p = p.parentNode;
+ }
+ },
+
+ /**
+ * Cascades down the tree from this node, calling the specified function with each node. The scope (this) of
+ * function call will be the scope provided or the current node. The arguments to the function
+ * will be the args provided or the current node. If the function returns false at any point,
+ * the cascade is stopped on that branch.
+ * @param {Function} fn The function to call
+ * @param {Object} scope (optional) The scope of the function (defaults to current node)
+ * @param {Array} args (optional) The args to call the function with (default to passing the current node)
+ */
+ cascade : function(fn, scope, args){
+ if(fn.apply(scope || this, args || [this]) !== false){
+ var cs = this.childNodes;
+ for(var i = 0, len = cs.length; i < len; i++) {
+ cs[i].cascade(fn, scope, args);
+ }
+ }
+ },
+
+ /**
+ * Interates the child nodes of this node, calling the specified function with each node. The scope (this) of
+ * function call will be the scope provided or the current node. The arguments to the function
+ * will be the args provided or the current node. If the function returns false at any point,
+ * the iteration stops.
+ * @param {Function} fn The function to call
+ * @param {Object} scope (optional) The scope of the function (defaults to current node)
+ * @param {Array} args (optional) The args to call the function with (default to passing the current node)
+ */
+ eachChild : function(fn, scope, args){
+ var cs = this.childNodes;
+ for(var i = 0, len = cs.length; i < len; i++) {
+ if(fn.apply(scope || this, args || [cs[i]]) === false){
+ break;
+ }
+ }
+ },
+
+ /**
+ * Finds the first child that has the attribute with the specified value.
+ * @param {String} attribute The attribute name
+ * @param {Mixed} value The value to search for
+ * @return {Node} The found child or null if none was found
+ */
+ findChild : function(attribute, value){
+ var cs = this.childNodes;
+ for(var i = 0, len = cs.length; i < len; i++) {
+ if(cs[i].attributes[attribute] == value){
+ return cs[i];
+ }
+ }
+ return null;
+ },
+
+ /**
+ * Finds the first child by a custom function. The child matches if the function passed
+ * returns true.
+ * @param {Function} fn
+ * @param {Object} scope (optional)
+ * @return {Node} The found child or null if none was found
+ */
+ findChildBy : function(fn, scope){
+ var cs = this.childNodes;
+ for(var i = 0, len = cs.length; i < len; i++) {
+ if(fn.call(scope||cs[i], cs[i]) === true){
+ return cs[i];
+ }
+ }
+ return null;
+ },
+
+ /**
+ * Sorts this nodes children using the supplied sort function
+ * @param {Function} fn
+ * @param {Object} scope (optional)
+ */
+ sort : function(fn, scope){
+ var cs = this.childNodes;
+ var len = cs.length;
+ if(len > 0){
+ var sortFn = scope ? function(){fn.apply(scope, arguments);} : fn;
+ cs.sort(sortFn);
+ for(var i = 0; i < len; i++){
+ var n = cs[i];
+ n.previousSibling = cs[i-1];
+ n.nextSibling = cs[i+1];
+ if(i === 0){
+ this.setFirstChild(n);
+ }
+ if(i == len-1){
+ this.setLastChild(n);
+ }
+ }
+ }
+ },
+
+ /**
+ * Returns true if this node is an ancestor (at any point) of the passed node.
+ * @param {Node} node
+ * @return {Boolean}
+ */
+ contains : function(node){
+ return node.isAncestor(this);
+ },
+
+ /**
+ * Returns true if the passed node is an ancestor (at any point) of this node.
+ * @param {Node} node
+ * @return {Boolean}
+ */
+ isAncestor : function(node){
+ var p = this.parentNode;
+ while(p){
+ if(p == node){
+ return true;
+ }
+ p = p.parentNode;
+ }
+ return false;
+ },
+
+ toString : function(){
+ return "[Node"+(this.id?" "+this.id:"")+"]";
+ }
+});
\ No newline at end of file