зеркало из https://github.com/mozilla/gecko-dev.git
Address Book drag and drop file, not in build yet.
This commit is contained in:
chuang%netscape.com
Родитель
c4a408e35b
Коммит
b5ab8c0cc3
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/* -*- Mode: Java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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function debugDump(msg)
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{
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// uncomment for noise
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dump(msg+"\n");
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}
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function GetDragService()
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{
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var dragService = Components.classes["component://netscape/widget/dragservice"].getService();
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if (dragService)
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dragService = dragService.QueryInterface(Components.interfaces.nsIDragService);
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return dragService;
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}
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function GetRDFService()
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{
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var rdf = Components.classes["component://netscape/rdf/rdf-service"].getService();
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if (rdf)
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rdf = rdf.QueryInterface(Components.interfaces.nsIRDFService);
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return rdf;
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}
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function DragOverTree(event)
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{
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var validFlavor = false;
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var dragSession = null;
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var retVal = true;
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var dragService = GetDragService();
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if ( !dragService ) return(false);
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dragSession = dragService.getCurrentSession();
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if ( !dragSession ) return(false);
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if ( dragSession.isDataFlavorSupported("text/nsabcard") ) validFlavor = true;
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//XXX other flavors here...
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// touch the attribute on the rowgroup to trigger the repaint with the drop feedback.
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if ( validFlavor )
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{
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//XXX this is really slow and likes to refresh N times per second.
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var rowGroup = event.target.parentNode.parentNode;
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rowGroup.setAttribute ( "dd-triggerrepaint", 0 );
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dragSession.canDrop = true;
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// necessary??
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retVal = false; // do not propagate message
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}
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return(retVal);
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}
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function BeginDragResultTree(event)
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{
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debugDump("BeginDragResultTree\n");
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//XXX we rely on a capturer to already have determined which item the mouse was over
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//XXX and have set an attribute.
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// if the click is on the tree proper, ignore it. We only care about clicks on items.
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var tree = resultsTree;
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if ( event.target == tree )
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return(true); // continue propagating the event
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var childWithDatabase = tree;
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if ( ! childWithDatabase )
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return(false);
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var database = childWithDatabase.database;
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var rdf = GetRDFService();
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if ((!rdf) || (!database)) { debugDump("CAN'T GET DATABASE\n"); return(false); }
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var dragStarted = false;
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var dragService = GetDragService();
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if ( !dragService ) return(false);
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var transArray = Components.classes["component://netscape/supports-array"].createInstance(Components.interfaces.nsISupportsArray);
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if ( !transArray ) return(false);
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var selArray = tree.selectedItems;
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var count = selArray.length;
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debugDump("selArray.length = " + count + "\n");
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for ( var i = 0; i < count; ++i )
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{
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var trans = Components.classes["component://netscape/widget/transferable"].createInstance(Components.interfaces.nsITransferable);
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if ( !trans ) return(false);
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var genTextData = Components.classes["component://netscape/supports-wstring"].createInstance(Components.interfaces.nsISupportsWString);
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if (!genTextData) return(false);
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trans.addDataFlavor("text/nsabcard");
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// get id (url)
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var id = selArray[i].getAttribute("id");
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genTextData.data = id;
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debugDump(" ID #" + i + " = " + id + "\n");
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trans.setTransferData ( "text/nsabcard", genTextData, id.length * 2 ); // doublebyte byte data
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// put it into the transferable as an |nsISupports|
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var genTrans = trans.QueryInterface(Components.interfaces.nsISupports);
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transArray.AppendElement(genTrans);
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}
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var nsIDragService = Components.interfaces.nsIDragService;
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dragService.invokeDragSession ( transArray, null, nsIDragService.DRAGDROP_ACTION_COPY +
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nsIDragService.DRAGDROP_ACTION_MOVE );
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dragStarted = true;
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return(!dragStarted); // don't propagate the event if a drag has begun
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}
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function DropOnDirectoryTree(event)
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{
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debugDump("DropOnTree\n");
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var RDF = GetRDFService();
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if (!RDF) return(false);
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var treeRoot = dirTree;
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if (!treeRoot) return(false);
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var treeDatabase = treeRoot.database;
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if (!treeDatabase) return(false);
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// target is the <treecell>, and "id" is on the <treeitem> two levels above
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var treeItem = event.target.parentNode.parentNode;
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if (!treeItem) return(false);
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// drop action is always "on" not "before" or "after"
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// get drop hint attributes
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var dropBefore = treeItem.getAttribute("dd-droplocation");
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var dropOn = treeItem.getAttribute("dd-dropon");
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var dropAction;
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if (dropOn == "true")
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dropAction = "on";
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else
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return(false);
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var targetID = treeItem.getAttribute("id");
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if (!targetID) return(false);
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debugDump("***targetID = " + targetID + "\n");
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var dragService = GetDragService();
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if ( !dragService ) return(false);
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var dragSession = dragService.getCurrentSession();
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if ( !dragSession ) return(false);
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var trans = Components.classes["component://netscape/widget/transferable"].createInstance(Components.interfaces.nsITransferable);
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if ( !trans ) return(false);
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trans.addDataFlavor("text/nsabcard");
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for ( var i = 0; i < dragSession.numDropItems; ++i )
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{
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dragSession.getData ( trans, i );
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dataObj = new Object();
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bestFlavor = new Object();
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len = new Object();
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trans.getAnyTransferData ( bestFlavor, dataObj, len );
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if ( dataObj ) dataObj = dataObj.value.QueryInterface(Components.interfaces.nsISupportsWString);
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if ( !dataObj ) continue;
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// pull the URL out of the data object
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var sourceID = dataObj.data.substring(0, len.value);
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if (!sourceID) continue;
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debugDump(" Node #" + i + ": drop '" + sourceID + "' " + dropAction + " '" + targetID + "'");
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debugDump("\n");
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sourceNode = RDF.GetResource(sourceID, true);
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if (!sourceNode)
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continue;
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// Prevent dropping of a node before, after, or on itself
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if (sourceNode == targetNode) continue;
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}
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return(false);
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}
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function DropOnResultTree(event)
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{
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debugDump("DropOnResultTree\n");
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return false;
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}
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