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-define("dojo/dnd/Source", [
- "../_base/array", "../_base/connect", "../_base/declare", "../_base/kernel", "../_base/lang",
- "../dom-class", "../dom-geometry", "../mouse", "../ready", "../topic",
- "./common", "./Selector", "./Manager"
-], function(array, connect, declare, kernel, lang, domClass, domGeom, mouse, ready, topic,
- dnd, Selector, Manager){
-
-// module:
-// dojo/dnd/Source
-
-/*
- Container property:
- "Horizontal"- if this is the horizontal container
- Source states:
- "" - normal state
- "Moved" - this source is being moved
- "Copied" - this source is being copied
- Target states:
- "" - normal state
- "Disabled" - the target cannot accept an avatar
- Target anchor state:
- "" - item is not selected
- "Before" - insert point is before the anchor
- "After" - insert point is after the anchor
-*/
-
-/*=====
-var __SourceArgs = {
- // summary:
- // a dict of parameters for DnD Source configuration. Note that any
- // property on Source elements may be configured, but this is the
- // short-list
- // isSource: Boolean?
- // can be used as a DnD source. Defaults to true.
- // accept: Array?
- // list of accepted types (text strings) for a target; defaults to
- // ["text"]
- // autoSync: Boolean
- // if true refreshes the node list on every operation; false by default
- // copyOnly: Boolean?
- // copy items, if true, use a state of Ctrl key otherwise,
- // see selfCopy and selfAccept for more details
- // delay: Number
- // the move delay in pixels before detecting a drag; 0 by default
- // horizontal: Boolean?
- // a horizontal container, if true, vertical otherwise or when omitted
- // selfCopy: Boolean?
- // copy items by default when dropping on itself,
- // false by default, works only if copyOnly is true
- // selfAccept: Boolean?
- // accept its own items when copyOnly is true,
- // true by default, works only if copyOnly is true
- // withHandles: Boolean?
- // allows dragging only by handles, false by default
- // generateText: Boolean?
- // generate text node for drag and drop, true by default
-};
-=====*/
-
-// For back-compat, remove in 2.0.
-if(!kernel.isAsync){
- ready(0, function(){
- var requires = ["dojo/dnd/AutoSource", "dojo/dnd/Target"];
- require(requires); // use indirection so modules not rolled into a build
- });
-}
-
-var Source = declare("dojo.dnd.Source", Selector, {
- // summary:
- // a Source object, which can be used as a DnD source, or a DnD target
-
- // object attributes (for markup)
- isSource: true,
- horizontal: false,
- copyOnly: false,
- selfCopy: false,
- selfAccept: true,
- skipForm: false,
- withHandles: false,
- autoSync: false,
- delay: 0, // pixels
- accept: ["text"],
- generateText: true,
-
- constructor: function(/*DOMNode|String*/ node, /*__SourceArgs?*/ params){
- // summary:
- // a constructor of the Source
- // node:
- // node or node's id to build the source on
- // params:
- // any property of this class may be configured via the params
- // object which is mixed-in to the `dojo/dnd/Source` instance
- lang.mixin(this, lang.mixin({}, params));
- var type = this.accept;
- if(type.length){
- this.accept = {};
- for(var i = 0; i < type.length; ++i){
- this.accept[type[i]] = 1;
- }
- }
- // class-specific variables
- this.isDragging = false;
- this.mouseDown = false;
- this.targetAnchor = null;
- this.targetBox = null;
- this.before = true;
- this._lastX = 0;
- this._lastY = 0;
- // states
- this.sourceState = "";
- if(this.isSource){
- domClass.add(this.node, "dojoDndSource");
- }
- this.targetState = "";
- if(this.accept){
- domClass.add(this.node, "dojoDndTarget");
- }
- if(this.horizontal){
- domClass.add(this.node, "dojoDndHorizontal");
- }
- // set up events
- this.topics = [
- topic.subscribe("/dnd/source/over", lang.hitch(this, "onDndSourceOver")),
- topic.subscribe("/dnd/start", lang.hitch(this, "onDndStart")),
- topic.subscribe("/dnd/drop", lang.hitch(this, "onDndDrop")),
- topic.subscribe("/dnd/cancel", lang.hitch(this, "onDndCancel"))
- ];
- },
-
- // methods
- checkAcceptance: function(source, nodes){
- // summary:
- // checks if the target can accept nodes from this source
- // source: Object
- // the source which provides items
- // nodes: Array
- // the list of transferred items
- if(this == source){
- return !this.copyOnly || this.selfAccept;
- }
- for(var i = 0; i < nodes.length; ++i){
- var type = source.getItem(nodes[i].id).type;
- // type instanceof Array
- var flag = false;
- for(var j = 0; j < type.length; ++j){
- if(type[j] in this.accept){
- flag = true;
- break;
- }
- }
- if(!flag){
- return false; // Boolean
- }
- }
- return true; // Boolean
- },
- copyState: function(keyPressed, self){
- // summary:
- // Returns true if we need to copy items, false to move.
- // It is separated to be overwritten dynamically, if needed.
- // keyPressed: Boolean
- // the "copy" key was pressed
- // self: Boolean?
- // optional flag that means that we are about to drop on itself
-
- if(keyPressed){ return true; }
- if(arguments.length < 2){
- self = this == Manager.manager().target;
- }
- if(self){
- if(this.copyOnly){
- return this.selfCopy;
- }
- }else{
- return this.copyOnly;
- }
- return false; // Boolean
- },
- destroy: function(){
- // summary:
- // prepares the object to be garbage-collected
- Source.superclass.destroy.call(this);
- array.forEach(this.topics, function(t){t.remove();});
- this.targetAnchor = null;
- },
-
- // mouse event processors
- onMouseMove: function(e){
- // summary:
- // event processor for onmousemove
- // e: Event
- // mouse event
- if(this.isDragging && this.targetState == "Disabled"){ return; }
- Source.superclass.onMouseMove.call(this, e);
- var m = Manager.manager();
- if(!this.isDragging){
- if(this.mouseDown && this.isSource &&
- (Math.abs(e.pageX - this._lastX) > this.delay || Math.abs(e.pageY - this._lastY) > this.delay)){
- var nodes = this.getSelectedNodes();
- if(nodes.length){
- m.startDrag(this, nodes, this.copyState(dnd.getCopyKeyState(e), true));
- }
- }
- }
- if(this.isDragging){
- // calculate before/after
- var before = false;
- if(this.current){
- if(!this.targetBox || this.targetAnchor != this.current){
- this.targetBox = domGeom.position(this.current, true);
- }
- if(this.horizontal){
- // In LTR mode, the left part of the object means "before", but in RTL mode it means "after".
- before = (e.pageX - this.targetBox.x < this.targetBox.w / 2) == domGeom.isBodyLtr(this.current.ownerDocument);
- }else{
- before = (e.pageY - this.targetBox.y) < (this.targetBox.h / 2);
- }
- }
- if(this.current != this.targetAnchor || before != this.before){
- this._markTargetAnchor(before);
- m.canDrop(!this.current || m.source != this || !(this.current.id in this.selection));
- }
- }
- },
- onMouseDown: function(e){
- // summary:
- // event processor for onmousedown
- // e: Event
- // mouse event
- if(!this.mouseDown && this._legalMouseDown(e) && (!this.skipForm || !dnd.isFormElement(e))){
- this.mouseDown = true;
- this._lastX = e.pageX;
- this._lastY = e.pageY;
- Source.superclass.onMouseDown.call(this, e);
- }
- },
- onMouseUp: function(e){
- // summary:
- // event processor for onmouseup
- // e: Event
- // mouse event
- if(this.mouseDown){
- this.mouseDown = false;
- Source.superclass.onMouseUp.call(this, e);
- }
- },
-
- // topic event processors
- onDndSourceOver: function(source){
- // summary:
- // topic event processor for /dnd/source/over, called when detected a current source
- // source: Object
- // the source which has the mouse over it
- if(this !== source){
- this.mouseDown = false;
- if(this.targetAnchor){
- this._unmarkTargetAnchor();
- }
- }else if(this.isDragging){
- var m = Manager.manager();
- m.canDrop(this.targetState != "Disabled" && (!this.current || m.source != this || !(this.current.id in this.selection)));
- }
- },
- onDndStart: function(source, nodes, copy){
- // summary:
- // topic event processor for /dnd/start, called to initiate the DnD operation
- // source: Object
- // the source which provides items
- // nodes: Array
- // the list of transferred items
- // copy: Boolean
- // copy items, if true, move items otherwise
- if(this.autoSync){ this.sync(); }
- if(this.isSource){
- this._changeState("Source", this == source ? (copy ? "Copied" : "Moved") : "");
- }
- var accepted = this.accept && this.checkAcceptance(source, nodes);
- this._changeState("Target", accepted ? "" : "Disabled");
- if(this == source){
- Manager.manager().overSource(this);
- }
- this.isDragging = true;
- },
- onDndDrop: function(source, nodes, copy, target){
- // summary:
- // topic event processor for /dnd/drop, called to finish the DnD operation
- // source: Object
- // the source which provides items
- // nodes: Array
- // the list of transferred items
- // copy: Boolean
- // copy items, if true, move items otherwise
- // target: Object
- // the target which accepts items
- if(this == target){
- // this one is for us => move nodes!
- this.onDrop(source, nodes, copy);
- }
- this.onDndCancel();
- },
- onDndCancel: function(){
- // summary:
- // topic event processor for /dnd/cancel, called to cancel the DnD operation
- if(this.targetAnchor){
- this._unmarkTargetAnchor();
- this.targetAnchor = null;
- }
- this.before = true;
- this.isDragging = false;
- this.mouseDown = false;
- this._changeState("Source", "");
- this._changeState("Target", "");
- },
-
- // local events
- onDrop: function(source, nodes, copy){
- // summary:
- // called only on the current target, when drop is performed
- // source: Object
- // the source which provides items
- // nodes: Array
- // the list of transferred items
- // copy: Boolean
- // copy items, if true, move items otherwise
-
- if(this != source){
- this.onDropExternal(source, nodes, copy);
- }else{
- this.onDropInternal(nodes, copy);
- }
- },
- onDropExternal: function(source, nodes, copy){
- // summary:
- // called only on the current target, when drop is performed
- // from an external source
- // source: Object
- // the source which provides items
- // nodes: Array
- // the list of transferred items
- // copy: Boolean
- // copy items, if true, move items otherwise
-
- var oldCreator = this._normalizedCreator;
- // transferring nodes from the source to the target
- if(this.creator){
- // use defined creator
- this._normalizedCreator = function(node, hint){
- return oldCreator.call(this, source.getItem(node.id).data, hint);
- };
- }else{
- // we have no creator defined => move/clone nodes
- if(copy){
- // clone nodes
- this._normalizedCreator = function(node /*=====, hint =====*/){
- var t = source.getItem(node.id);
- var n = node.cloneNode(true);
- n.id = dnd.getUniqueId();
- return {node: n, data: t.data, type: t.type};
- };
- }else{
- // move nodes
- this._normalizedCreator = function(node /*=====, hint =====*/){
- var t = source.getItem(node.id);
- source.delItem(node.id);
- return {node: node, data: t.data, type: t.type};
- };
- }
- }
- this.selectNone();
- if(!copy && !this.creator){
- source.selectNone();
- }
- this.insertNodes(true, nodes, this.before, this.current);
- if(!copy && this.creator){
- source.deleteSelectedNodes();
- }
- this._normalizedCreator = oldCreator;
- },
- onDropInternal: function(nodes, copy){
- // summary:
- // called only on the current target, when drop is performed
- // from the same target/source
- // nodes: Array
- // the list of transferred items
- // copy: Boolean
- // copy items, if true, move items otherwise
-
- var oldCreator = this._normalizedCreator;
- // transferring nodes within the single source
- if(this.current && this.current.id in this.selection){
- // do nothing
- return;
- }
- if(copy){
- if(this.creator){
- // create new copies of data items
- this._normalizedCreator = function(node, hint){
- return oldCreator.call(this, this.getItem(node.id).data, hint);
- };
- }else{
- // clone nodes
- this._normalizedCreator = function(node/*=====, hint =====*/){
- var t = this.getItem(node.id);
- var n = node.cloneNode(true);
- n.id = dnd.getUniqueId();
- return {node: n, data: t.data, type: t.type};
- };
- }
- }else{
- // move nodes
- if(!this.current){
- // do nothing
- return;
- }
- this._normalizedCreator = function(node /*=====, hint =====*/){
- var t = this.getItem(node.id);
- return {node: node, data: t.data, type: t.type};
- };
- }
- this._removeSelection();
- this.insertNodes(true, nodes, this.before, this.current);
- this._normalizedCreator = oldCreator;
- },
- onDraggingOver: function(){
- // summary:
- // called during the active DnD operation, when items
- // are dragged over this target, and it is not disabled
- },
- onDraggingOut: function(){
- // summary:
- // called during the active DnD operation, when items
- // are dragged away from this target, and it is not disabled
- },
-
- // utilities
- onOverEvent: function(){
- // summary:
- // this function is called once, when mouse is over our container
- Source.superclass.onOverEvent.call(this);
- Manager.manager().overSource(this);
- if(this.isDragging && this.targetState != "Disabled"){
- this.onDraggingOver();
- }
- },
- onOutEvent: function(){
- // summary:
- // this function is called once, when mouse is out of our container
- Source.superclass.onOutEvent.call(this);
- Manager.manager().outSource(this);
- if(this.isDragging && this.targetState != "Disabled"){
- this.onDraggingOut();
- }
- },
- _markTargetAnchor: function(before){
- // summary:
- // assigns a class to the current target anchor based on "before" status
- // before: Boolean
- // insert before, if true, after otherwise
- if(this.current == this.targetAnchor && this.before == before){ return; }
- if(this.targetAnchor){
- this._removeItemClass(this.targetAnchor, this.before ? "Before" : "After");
- }
- this.targetAnchor = this.current;
- this.targetBox = null;
- this.before = before;
- if(this.targetAnchor){
- this._addItemClass(this.targetAnchor, this.before ? "Before" : "After");
- }
- },
- _unmarkTargetAnchor: function(){
- // summary:
- // removes a class of the current target anchor based on "before" status
- if(!this.targetAnchor){ return; }
- this._removeItemClass(this.targetAnchor, this.before ? "Before" : "After");
- this.targetAnchor = null;
- this.targetBox = null;
- this.before = true;
- },
- _markDndStatus: function(copy){
- // summary:
- // changes source's state based on "copy" status
- this._changeState("Source", copy ? "Copied" : "Moved");
- },
- _legalMouseDown: function(e){
- // summary:
- // checks if user clicked on "approved" items
- // e: Event
- // mouse event
-
- // accept only the left mouse button, or the left finger
- if(e.type != "touchstart" && !mouse.isLeft(e)){ return false; }
-
- if(!this.withHandles){ return true; }
-
- // check for handles
- for(var node = e.target; node && node !== this.node; node = node.parentNode){
- if(domClass.contains(node, "dojoDndHandle")){ return true; }
- if(domClass.contains(node, "dojoDndItem") || domClass.contains(node, "dojoDndIgnore")){ break; }
- }
- return false; // Boolean
- }
-});
-
-return Source;
-
-});
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-30 09:25:10 +0000