457 lines
12 KiB
JavaScript
457 lines
12 KiB
JavaScript
define("dojo/dnd/Container", [
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"../_base/array",
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"../_base/declare",
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"../_base/event",
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"../_base/kernel",
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"../_base/lang",
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"../_base/window",
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"../dom",
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"../dom-class",
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"../dom-construct",
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"../Evented",
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"../has",
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"../on",
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"../query",
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"../ready",
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"../touch",
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"./common"
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], function(
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array, declare, event, kernel, lang, win,
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dom, domClass, domConstruct, Evented, has, on, query, ready, touch, dnd){
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// module:
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// dojo/dnd/Container
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/*
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Container states:
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"" - normal state
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"Over" - mouse over a container
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Container item states:
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"" - normal state
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"Over" - mouse over a container item
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*/
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var Container = declare("dojo.dnd.Container", Evented, {
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// summary:
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// a Container object, which knows when mouse hovers over it,
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// and over which element it hovers
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// object attributes (for markup)
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skipForm: false,
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// allowNested: Boolean
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// Indicates whether to allow dnd item nodes to be nested within other elements.
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// By default this is false, indicating that only direct children of the container can
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// be draggable dnd item nodes
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allowNested: false,
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/*=====
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// current: DomNode
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// The DOM node the mouse is currently hovered over
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current: null,
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// map: Hash<String, Container.Item>
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// Map from an item's id (which is also the DOMNode's id) to
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// the dojo/dnd/Container.Item itself.
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map: {},
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=====*/
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constructor: function(node, params){
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// summary:
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// a constructor of the Container
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// node: Node
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// node or node's id to build the container on
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// params: Container.__ContainerArgs
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// a dictionary of parameters
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this.node = dom.byId(node);
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if(!params){ params = {}; }
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this.creator = params.creator || null;
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this.skipForm = params.skipForm;
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this.parent = params.dropParent && dom.byId(params.dropParent);
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// class-specific variables
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this.map = {};
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this.current = null;
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// states
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this.containerState = "";
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domClass.add(this.node, "dojoDndContainer");
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// mark up children
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if(!(params && params._skipStartup)){
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this.startup();
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}
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// set up events
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this.events = [
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on(this.node, touch.over, lang.hitch(this, "onMouseOver")),
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on(this.node, touch.out, lang.hitch(this, "onMouseOut")),
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// cancel text selection and text dragging
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on(this.node, "dragstart", lang.hitch(this, "onSelectStart")),
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on(this.node, "selectstart", lang.hitch(this, "onSelectStart"))
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];
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},
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// object attributes (for markup)
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creator: function(){
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// summary:
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// creator function, dummy at the moment
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},
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// abstract access to the map
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getItem: function(/*String*/ key){
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// summary:
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// returns a data item by its key (id)
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return this.map[key]; // Container.Item
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},
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setItem: function(/*String*/ key, /*Container.Item*/ data){
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// summary:
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// associates a data item with its key (id)
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this.map[key] = data;
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},
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delItem: function(/*String*/ key){
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// summary:
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// removes a data item from the map by its key (id)
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delete this.map[key];
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},
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forInItems: function(/*Function*/ f, /*Object?*/ o){
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// summary:
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// iterates over a data map skipping members that
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// are present in the empty object (IE and/or 3rd-party libraries).
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o = o || kernel.global;
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var m = this.map, e = dnd._empty;
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for(var i in m){
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if(i in e){ continue; }
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f.call(o, m[i], i, this);
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}
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return o; // Object
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},
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clearItems: function(){
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// summary:
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// removes all data items from the map
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this.map = {};
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},
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// methods
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getAllNodes: function(){
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// summary:
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// returns a list (an array) of all valid child nodes
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return query((this.allowNested ? "" : "> ") + ".dojoDndItem", this.parent); // NodeList
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},
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sync: function(){
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// summary:
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// sync up the node list with the data map
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var map = {};
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this.getAllNodes().forEach(function(node){
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if(node.id){
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var item = this.getItem(node.id);
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if(item){
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map[node.id] = item;
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return;
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}
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}else{
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node.id = dnd.getUniqueId();
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}
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var type = node.getAttribute("dndType"),
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data = node.getAttribute("dndData");
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map[node.id] = {
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data: data || node.innerHTML,
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type: type ? type.split(/\s*,\s*/) : ["text"]
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};
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}, this);
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this.map = map;
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return this; // self
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},
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insertNodes: function(data, before, anchor){
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// summary:
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// inserts an array of new nodes before/after an anchor node
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// data: Array
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// a list of data items, which should be processed by the creator function
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// before: Boolean
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// insert before the anchor, if true, and after the anchor otherwise
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// anchor: Node
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// the anchor node to be used as a point of insertion
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if(!this.parent.firstChild){
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anchor = null;
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}else if(before){
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if(!anchor){
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anchor = this.parent.firstChild;
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}
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}else{
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if(anchor){
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anchor = anchor.nextSibling;
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}
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}
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var i, t;
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if(anchor){
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for(i = 0; i < data.length; ++i){
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t = this._normalizedCreator(data[i]);
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this.setItem(t.node.id, {data: t.data, type: t.type});
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anchor.parentNode.insertBefore(t.node, anchor);
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}
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}else{
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for(i = 0; i < data.length; ++i){
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t = this._normalizedCreator(data[i]);
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this.setItem(t.node.id, {data: t.data, type: t.type});
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this.parent.appendChild(t.node);
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}
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}
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return this; // self
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},
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destroy: function(){
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// summary:
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// prepares this object to be garbage-collected
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array.forEach(this.events, function(handle){ handle.remove(); });
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this.clearItems();
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this.node = this.parent = this.current = null;
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},
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// markup methods
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markupFactory: function(params, node, Ctor){
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params._skipStartup = true;
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return new Ctor(node, params);
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},
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startup: function(){
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// summary:
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// collects valid child items and populate the map
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// set up the real parent node
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if(!this.parent){
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// use the standard algorithm, if not assigned
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this.parent = this.node;
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if(this.parent.tagName.toLowerCase() == "table"){
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var c = this.parent.getElementsByTagName("tbody");
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if(c && c.length){ this.parent = c[0]; }
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}
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}
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this.defaultCreator = dnd._defaultCreator(this.parent);
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// process specially marked children
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this.sync();
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},
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// mouse events
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onMouseOver: function(e){
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// summary:
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// event processor for onmouseover or touch, to mark that element as the current element
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// e: Event
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// mouse event
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var n = e.relatedTarget;
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while(n){
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if(n == this.node){ break; }
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try{
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n = n.parentNode;
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}catch(x){
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n = null;
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}
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}
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if(!n){
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this._changeState("Container", "Over");
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this.onOverEvent();
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}
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n = this._getChildByEvent(e);
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if(this.current == n){ return; }
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if(this.current){ this._removeItemClass(this.current, "Over"); }
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if(n){ this._addItemClass(n, "Over"); }
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this.current = n;
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},
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onMouseOut: function(e){
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// summary:
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// event processor for onmouseout
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// e: Event
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// mouse event
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for(var n = e.relatedTarget; n;){
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if(n == this.node){ return; }
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try{
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n = n.parentNode;
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}catch(x){
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n = null;
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}
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}
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if(this.current){
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this._removeItemClass(this.current, "Over");
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this.current = null;
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}
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this._changeState("Container", "");
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this.onOutEvent();
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},
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onSelectStart: function(e){
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// summary:
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// event processor for onselectevent and ondragevent
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// e: Event
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// mouse event
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if(!this.skipForm || !dnd.isFormElement(e)){
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event.stop(e);
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}
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},
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// utilities
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onOverEvent: function(){
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// summary:
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// this function is called once, when mouse is over our container
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},
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onOutEvent: function(){
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// summary:
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// this function is called once, when mouse is out of our container
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},
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_changeState: function(type, newState){
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// summary:
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// changes a named state to new state value
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// type: String
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// a name of the state to change
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// newState: String
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// new state
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var prefix = "dojoDnd" + type;
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var state = type.toLowerCase() + "State";
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//domClass.replace(this.node, prefix + newState, prefix + this[state]);
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domClass.replace(this.node, prefix + newState, prefix + this[state]);
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this[state] = newState;
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},
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_addItemClass: function(node, type){
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// summary:
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// adds a class with prefix "dojoDndItem"
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// node: Node
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// a node
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// type: String
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// a variable suffix for a class name
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domClass.add(node, "dojoDndItem" + type);
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},
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_removeItemClass: function(node, type){
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// summary:
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// removes a class with prefix "dojoDndItem"
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// node: Node
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// a node
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// type: String
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// a variable suffix for a class name
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domClass.remove(node, "dojoDndItem" + type);
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},
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_getChildByEvent: function(e){
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// summary:
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// gets a child, which is under the mouse at the moment, or null
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// e: Event
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// a mouse event
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var node = e.target;
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if(node){
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for(var parent = node.parentNode; parent; node = parent, parent = node.parentNode){
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if((parent == this.parent || this.allowNested) && domClass.contains(node, "dojoDndItem")){ return node; }
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}
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}
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return null;
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},
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_normalizedCreator: function(/*Container.Item*/ item, /*String*/ hint){
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// summary:
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// adds all necessary data to the output of the user-supplied creator function
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var t = (this.creator || this.defaultCreator).call(this, item, hint);
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if(!lang.isArray(t.type)){ t.type = ["text"]; }
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if(!t.node.id){ t.node.id = dnd.getUniqueId(); }
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domClass.add(t.node, "dojoDndItem");
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return t;
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}
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});
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dnd._createNode = function(tag){
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// summary:
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// returns a function, which creates an element of given tag
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// (SPAN by default) and sets its innerHTML to given text
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// tag: String
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// a tag name or empty for SPAN
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if(!tag){ return dnd._createSpan; }
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return function(text){ // Function
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return domConstruct.create(tag, {innerHTML: text}); // Node
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};
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};
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dnd._createTrTd = function(text){
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// summary:
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// creates a TR/TD structure with given text as an innerHTML of TD
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// text: String
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// a text for TD
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var tr = domConstruct.create("tr");
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domConstruct.create("td", {innerHTML: text}, tr);
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return tr; // Node
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};
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dnd._createSpan = function(text){
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// summary:
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// creates a SPAN element with given text as its innerHTML
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// text: String
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// a text for SPAN
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return domConstruct.create("span", {innerHTML: text}); // Node
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};
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// dnd._defaultCreatorNodes: Object
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// a dictionary that maps container tag names to child tag names
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dnd._defaultCreatorNodes = {ul: "li", ol: "li", div: "div", p: "div"};
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dnd._defaultCreator = function(node){
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// summary:
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// takes a parent node, and returns an appropriate creator function
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// node: Node
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// a container node
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var tag = node.tagName.toLowerCase();
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var c = tag == "tbody" || tag == "thead" ? dnd._createTrTd :
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dnd._createNode(dnd._defaultCreatorNodes[tag]);
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return function(item, hint){ // Function
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var isObj = item && lang.isObject(item), data, type, n;
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if(isObj && item.tagName && item.nodeType && item.getAttribute){
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// process a DOM node
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data = item.getAttribute("dndData") || item.innerHTML;
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type = item.getAttribute("dndType");
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type = type ? type.split(/\s*,\s*/) : ["text"];
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n = item; // this node is going to be moved rather than copied
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}else{
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// process a DnD item object or a string
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data = (isObj && item.data) ? item.data : item;
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type = (isObj && item.type) ? item.type : ["text"];
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n = (hint == "avatar" ? dnd._createSpan : c)(String(data));
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}
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if(!n.id){
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n.id = dnd.getUniqueId();
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}
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return {node: n, data: data, type: type};
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};
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};
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/*=====
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Container.__ContainerArgs = declare([], {
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creator: function(){
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// summary:
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// a creator function, which takes a data item, and returns an object like that:
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// {node: newNode, data: usedData, type: arrayOfStrings}
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},
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// skipForm: Boolean
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// don't start the drag operation, if clicked on form elements
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skipForm: false,
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// dropParent: Node||String
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// node or node's id to use as the parent node for dropped items
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// (must be underneath the 'node' parameter in the DOM)
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dropParent: null,
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// _skipStartup: Boolean
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// skip startup(), which collects children, for deferred initialization
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// (this is used in the markup mode)
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_skipStartup: false
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});
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Container.Item = function(){
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// summary:
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// Represents (one of) the source node(s) being dragged.
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// Contains (at least) the "type" and "data" attributes.
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// type: String[]
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// Type(s) of this item, by default this is ["text"]
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// data: Object
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// Logical representation of the object being dragged.
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// If the drag object's type is "text" then data is a String,
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// if it's another type then data could be a different Object,
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// perhaps a name/value hash.
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this.type = type;
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this.data = data;
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};
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=====*/
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return Container;
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});
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