c559d9bfe0
r=bryner,sr=blake,a=asa git-svn-id: svn://10.0.0.236/trunk@115406 18797224-902f-48f8-a5cc-f745e15eee43
264 lines
9.5 KiB
JavaScript
264 lines
9.5 KiB
JavaScript
/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: NPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* 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
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Ben Goodger <ben@netscape.com> (Original Author)
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the NPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the NPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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////////////////////////////////////////////////////////////////////////////
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// XXX - WARNING - DRAG AND DROP API CHANGE ALERT - XXX
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// This file has been extensively modified in a checkin planned for Mozilla
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// 0.8, and the API has been modified. DO NOT MODIFY THIS FILE without
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// approval from ben@netscape.com, otherwise your changes will be lost.
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/**
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* XXX - until load is supported in chrome, you also need to include
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* these files:
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* chrome://global/content/nsTransferable.js
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**/
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/**
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* nsDragAndDrop - a convenience wrapper for nsTransferable, nsITransferable
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* and nsIDragService/nsIDragSession.
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*
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* USAGE INFORMATION: see 'README-nsDragAndDrop.html' in the same source directory
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* as this file (typically xpfe/global/resources/content)
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*/
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var nsDragAndDrop = {
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_mDS: null,
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get mDragService()
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{
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if (!this._mDS)
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{
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const kDSContractID = "@mozilla.org/widget/dragservice;1";
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const kDSIID = Components.interfaces.nsIDragService;
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this._mDS = Components.classes[kDSContractID].getService(kDSIID);
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}
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return this._mDS;
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},
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/**
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* void startDrag (DOMEvent aEvent, Object aDragDropObserver) ;
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*
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* called when a drag on an element is started.
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*
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* @param DOMEvent aEvent
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* the DOM event fired by the drag init
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* @param Object aDragDropObserver
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* javascript object of format described above that specifies
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* the way in which the element responds to drag events.
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**/
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startDrag: function (aEvent, aDragDropObserver)
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{
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if (!("onDragStart" in aDragDropObserver))
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return;
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const kDSIID = Components.interfaces.nsIDragService;
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var dragAction = { action: kDSIID.DRAGDROP_ACTION_COPY + kDSIID.DRAGDROP_ACTION_MOVE + kDSIID.DRAGDROP_ACTION_LINK };
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var transferData = { data: null };
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try
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{
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aDragDropObserver.onDragStart(aEvent, transferData, dragAction);
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}
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catch (e)
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{
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return; // not a draggable item, bail!
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}
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if (!transferData.data) return;
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transferData = transferData.data;
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var transArray = Components.classes["@mozilla.org/supports-array;1"]
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.createInstance(Components.interfaces.nsISupportsArray);
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var region = null;
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if (aEvent.originalTarget.localName == "outlinerchildren") {
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// let's build the drag region
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var outliner = aEvent.originalTarget.parentNode;
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try {
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region = Components.classes["@mozilla.org/gfx/region;1"].createInstance(Components.interfaces.nsIScriptableRegion);
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region.init();
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var obo = outliner.outlinerBoxObject;
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var bo = obo.outlinerBody.boxObject;
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var obosel= obo.selection;
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var rowX = bo.x;
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var rowY = bo.y;
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var rowHeight = obo.rowHeight;
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var rowWidth = bo.width;
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//add a rectangle for each visible selected row
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for (var i = obo.getFirstVisibleRow(); i <= obo.getLastVisibleRow(); i ++)
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{
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if (obosel.isSelected(i))
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region.unionRect(rowX, rowY, rowWidth, rowHeight);
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rowY = rowY + rowHeight;
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}
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//and finally, clip the result to be sure we don't spill over...
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region.intersectRect(bo.x, bo.y, bo.width, bo.height);
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} catch(ex) {
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dump("Error while building selection region: " + ex + "\n");
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region = null;
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}
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}
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var count = 0;
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do
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{
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var trans = nsTransferable.set(transferData._XferID == "TransferData"
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? transferData
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: transferData.dataList[count++]);
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transArray.AppendElement(trans.QueryInterface(Components.interfaces.nsISupports));
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}
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while (transferData._XferID == "TransferDataSet" &&
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count < transferData.dataList.length);
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try {
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this.mDragService.invokeDragSession(aEvent.target, transArray, region, dragAction.action);
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}
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catch(ex) {
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// this could be because the user pressed escape to
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// cancel the drag. even if it's not, there's not much
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// we can do, so be silent.
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}
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aEvent.preventBubble();
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},
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/**
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* void dragOver (DOMEvent aEvent, Object aDragDropObserver) ;
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*
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* called when a drag passes over this element
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*
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* @param DOMEvent aEvent
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* the DOM event fired by the drag init
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* @param Object aDragDropObserver
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* javascript object of format described above that specifies
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* the way in which the element responds to drag events.
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**/
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dragOver: function (aEvent, aDragDropObserver)
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{
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if (!("onDragOver" in aDragDropObserver))
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return;
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if (!this.mDragSession)
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this.mDragSession = this.mDragService.getCurrentSession();
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if (this.mDragSession)
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{
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var flavourSet = aDragDropObserver.getSupportedFlavours();
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for (var flavour in flavourSet.flavourTable)
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{
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if (this.mDragSession.isDataFlavorSupported(flavour))
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{
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this.mDragSession.canDrop = (this.mDragSession.sourceNode != aEvent.target);
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aDragDropObserver.onDragOver(aEvent,
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flavourSet.flavourTable[flavour],
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this.mDragSession);
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aEvent.preventBubble();
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break;
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}
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}
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}
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},
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mDragSession: null,
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/**
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* void drop (DOMEvent aEvent, Object aDragDropObserver) ;
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*
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* called when the user drops on the element
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*
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* @param DOMEvent aEvent
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* the DOM event fired by the drag init
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* @param Object aDragDropObserver
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* javascript object of format described above that specifies
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* the way in which the element responds to drag events.
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**/
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drop: function (aEvent, aDragDropObserver)
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{
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if (!("onDrop" in aDragDropObserver))
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return;
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if (!this.mDragSession)
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this.mDragSession = this.mDragService.getCurrentSession();
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if (this.mDragSession)
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{
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var flavourSet = aDragDropObserver.getSupportedFlavours();
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var transferData = nsTransferable.get(flavourSet, this.getDragData, true);
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aEvent.preventBubble();
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// hand over to the client to respond to dropped data
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var multiple = "canHandleMultipleItems" in aDragDropObserver && aDragDropObserver.canHandleMultipleItems;
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var dropData = multiple ? transferData : transferData.first.first;
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aDragDropObserver.onDrop(aEvent, dropData, this.mDragSession);
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}
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},
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dragExit: function (aEvent, aDragDropObserver)
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{
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if ("onDragExit" in aDragDropObserver)
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aDragDropObserver.onDragExit(aEvent, this.mDragSession);
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},
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/**
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* nsISupportsArray getDragData (Object aFlavourList)
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*
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* Creates a nsISupportsArray of all droppable items for the given
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* set of supported flavours.
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*
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* @param FlavourSet aFlavourSet
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* formatted flavour list.
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**/
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getDragData: function (aFlavourSet)
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{
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var supportsArray = Components.classes["@mozilla.org/supports-array;1"]
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.createInstance(Components.interfaces.nsISupportsArray);
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for (var i = 0; i < nsDragAndDrop.mDragSession.numDropItems; ++i)
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{
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var trans = nsTransferable.createTransferable();
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for (var j = 0; j < aFlavourSet.flavours.length; ++j)
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trans.addDataFlavor(aFlavourSet.flavours[j].contentType);
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nsDragAndDrop.mDragSession.getData(trans, i);
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supportsArray.AppendElement(trans);
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}
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return supportsArray;
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}
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};
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