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332 lines
9.0 KiB
JavaScript
332 lines
9.0 KiB
JavaScript
define("dojo/dnd/Selector", [
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"../_base/array", "../_base/declare", "../_base/event", "../_base/kernel", "../_base/lang",
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"../dom", "../dom-construct", "../mouse", "../_base/NodeList", "../on", "../touch", "./common", "./Container"
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], function(array, declare, event, kernel, lang, dom, domConstruct, mouse, NodeList, on, touch, dnd, Container){
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// module:
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// dojo/dnd/Selector
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/*
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Container item states:
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"" - an item is not selected
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"Selected" - an item is selected
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"Anchor" - an item is selected, and is an anchor for a "shift" selection
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*/
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/*=====
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var __SelectorArgs = declare([Container.__ContainerArgs], {
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// singular: Boolean
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// allows selection of only one element, if true
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singular: false,
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// autoSync: Boolean
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// autosynchronizes the source with its list of DnD nodes,
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autoSync: false
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});
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=====*/
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var Selector = declare("dojo.dnd.Selector", Container, {
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// summary:
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// a Selector object, which knows how to select its children
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/*=====
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// selection: Set<String>
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// The set of id's that are currently selected, such that this.selection[id] == 1
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// if the node w/that id is selected. Can iterate over selected node's id's like:
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// | for(var id in this.selection)
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selection: {},
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=====*/
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constructor: function(node, params){
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// summary:
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// constructor of the Selector
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// node: Node||String
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// node or node's id to build the selector on
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// params: __SelectorArgs?
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// a dictionary of parameters
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if(!params){ params = {}; }
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this.singular = params.singular;
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this.autoSync = params.autoSync;
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// class-specific variables
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this.selection = {};
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this.anchor = null;
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this.simpleSelection = false;
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// set up events
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this.events.push(
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on(this.node, touch.press, lang.hitch(this, "onMouseDown")),
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on(this.node, touch.release, lang.hitch(this, "onMouseUp"))
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);
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},
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// object attributes (for markup)
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singular: false, // is singular property
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// methods
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getSelectedNodes: function(){
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// summary:
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// returns a list (an array) of selected nodes
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var t = new NodeList();
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var e = dnd._empty;
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for(var i in this.selection){
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if(i in e){ continue; }
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t.push(dom.byId(i));
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}
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return t; // NodeList
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},
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selectNone: function(){
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// summary:
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// unselects all items
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return this._removeSelection()._removeAnchor(); // self
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},
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selectAll: function(){
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// summary:
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// selects all items
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this.forInItems(function(data, id){
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this._addItemClass(dom.byId(id), "Selected");
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this.selection[id] = 1;
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}, this);
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return this._removeAnchor(); // self
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},
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deleteSelectedNodes: function(){
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// summary:
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// deletes all selected items
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var e = dnd._empty;
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for(var i in this.selection){
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if(i in e){ continue; }
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var n = dom.byId(i);
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this.delItem(i);
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domConstruct.destroy(n);
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}
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this.anchor = null;
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this.selection = {};
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return this; // self
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},
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forInSelectedItems: function(/*Function*/ f, /*Object?*/ o){
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// summary:
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// iterates over selected items;
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// see `dojo/dnd/Container.forInItems()` for details
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o = o || kernel.global;
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var s = this.selection, e = dnd._empty;
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for(var i in s){
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if(i in e){ continue; }
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f.call(o, this.getItem(i), i, this);
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}
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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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Selector.superclass.sync.call(this);
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// fix the anchor
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if(this.anchor){
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if(!this.getItem(this.anchor.id)){
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this.anchor = null;
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}
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}
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// fix the selection
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var t = [], e = dnd._empty;
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for(var i in this.selection){
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if(i in e){ continue; }
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if(!this.getItem(i)){
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t.push(i);
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}
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}
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array.forEach(t, function(i){
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delete this.selection[i];
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}, this);
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return this; // self
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},
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insertNodes: function(addSelected, data, before, anchor){
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// summary:
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// inserts new data items (see `dojo/dnd/Container.insertNodes()` method for details)
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// addSelected: Boolean
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// all new nodes will be added to selected items, if true, no selection change otherwise
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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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var oldCreator = this._normalizedCreator;
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this._normalizedCreator = function(item, hint){
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var t = oldCreator.call(this, item, hint);
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if(addSelected){
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if(!this.anchor){
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this.anchor = t.node;
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this._removeItemClass(t.node, "Selected");
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this._addItemClass(this.anchor, "Anchor");
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}else if(this.anchor != t.node){
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this._removeItemClass(t.node, "Anchor");
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this._addItemClass(t.node, "Selected");
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}
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this.selection[t.node.id] = 1;
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}else{
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this._removeItemClass(t.node, "Selected");
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this._removeItemClass(t.node, "Anchor");
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}
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return t;
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};
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Selector.superclass.insertNodes.call(this, data, before, anchor);
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this._normalizedCreator = oldCreator;
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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 the object to be garbage-collected
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Selector.superclass.destroy.call(this);
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this.selection = this.anchor = null;
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},
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// mouse events
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onMouseDown: function(e){
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// summary:
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// event processor for onmousedown
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// e: Event
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// mouse event
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if(this.autoSync){ this.sync(); }
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if(!this.current){ return; }
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if(!this.singular && !dnd.getCopyKeyState(e) && !e.shiftKey && (this.current.id in this.selection)){
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this.simpleSelection = true;
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if(mouse.isLeft(e)){
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// Accept the left button and stop the event. Stopping the event prevents text selection while
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// dragging. However, don't stop the event on mobile because that prevents a click event,
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// and also prevents scroll (see #15838).
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// For IE we don't stop event when multiple buttons are pressed.
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event.stop(e);
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}
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return;
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}
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if(!this.singular && e.shiftKey){
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if(!dnd.getCopyKeyState(e)){
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this._removeSelection();
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}
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var c = this.getAllNodes();
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if(c.length){
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if(!this.anchor){
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this.anchor = c[0];
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this._addItemClass(this.anchor, "Anchor");
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}
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this.selection[this.anchor.id] = 1;
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if(this.anchor != this.current){
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var i = 0, node;
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for(; i < c.length; ++i){
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node = c[i];
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if(node == this.anchor || node == this.current){ break; }
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}
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for(++i; i < c.length; ++i){
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node = c[i];
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if(node == this.anchor || node == this.current){ break; }
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this._addItemClass(node, "Selected");
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this.selection[node.id] = 1;
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}
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this._addItemClass(this.current, "Selected");
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this.selection[this.current.id] = 1;
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}
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}
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}else{
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if(this.singular){
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if(this.anchor == this.current){
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if(dnd.getCopyKeyState(e)){
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this.selectNone();
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}
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}else{
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this.selectNone();
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this.anchor = this.current;
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this._addItemClass(this.anchor, "Anchor");
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this.selection[this.current.id] = 1;
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}
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}else{
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if(dnd.getCopyKeyState(e)){
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if(this.anchor == this.current){
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delete this.selection[this.anchor.id];
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this._removeAnchor();
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}else{
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if(this.current.id in this.selection){
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this._removeItemClass(this.current, "Selected");
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delete this.selection[this.current.id];
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}else{
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if(this.anchor){
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this._removeItemClass(this.anchor, "Anchor");
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this._addItemClass(this.anchor, "Selected");
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}
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this.anchor = this.current;
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this._addItemClass(this.current, "Anchor");
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this.selection[this.current.id] = 1;
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}
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}
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}else{
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if(!(this.current.id in this.selection)){
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this.selectNone();
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this.anchor = this.current;
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this._addItemClass(this.current, "Anchor");
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this.selection[this.current.id] = 1;
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}
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}
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}
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}
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event.stop(e);
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},
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onMouseUp: function(/*===== e =====*/){
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// summary:
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// event processor for onmouseup
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// e: Event
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// mouse event
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if(!this.simpleSelection){ return; }
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this.simpleSelection = false;
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this.selectNone();
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if(this.current){
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this.anchor = this.current;
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this._addItemClass(this.anchor, "Anchor");
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this.selection[this.current.id] = 1;
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}
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},
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onMouseMove: function(/*===== e =====*/){
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// summary:
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// event processor for onmousemove
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// e: Event
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// mouse event
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this.simpleSelection = false;
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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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this.onmousemoveEvent = on(this.node, touch.move, lang.hitch(this, "onMouseMove"));
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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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if(this.onmousemoveEvent){
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this.onmousemoveEvent.remove();
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delete this.onmousemoveEvent;
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}
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},
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_removeSelection: function(){
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// summary:
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// unselects all items
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var e = dnd._empty;
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for(var i in this.selection){
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if(i in e){ continue; }
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var node = dom.byId(i);
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if(node){ this._removeItemClass(node, "Selected"); }
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}
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this.selection = {};
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return this; // self
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},
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_removeAnchor: function(){
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if(this.anchor){
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this._removeItemClass(this.anchor, "Anchor");
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this.anchor = null;
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}
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return this; // self
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}
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});
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return Selector;
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});
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