RetroZilla/extensions/inspector/resources/content/jsutil/xul/DNDUtils.js

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2015-10-21 05:03:22 +02:00
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 2001
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Joe Hewitt <hewitt@netscape.com> (original author)
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/***************************************************************
* DNDUtils -------------------------------------------------
* Utility functions for common drag and drop tasks.
* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
* REQUIRED IMPORTS:
****************************************************************/
//////////// global variables /////////////////////
var app;
//////////// global constants ////////////////////
////////////////////////////////////////////////////////////////////////////
//// class DNDUtils
var DNDUtils =
{
invokeSession: function(aTarget, aTypes, aValues)
{
var transData, trans, supports;
var transArray = XPCU.createInstance("@mozilla.org/supports-array;1", "nsISupportsArray");
for (var i = 0; i < aTypes.length; ++i) {
transData = this.createTransferableData(aValues[i]);
trans = XPCU.createInstance("@mozilla.org/widget/transferable;1", "nsITransferable");
trans.addDataFlavor(aTypes[i]);
trans.setTransferData (aTypes[i], transData.data, transData.size);
supports = trans.QueryInterface(Components.interfaces.nsISupports);
transArray.AppendElement(supports);
}
var nsIDragService = Components.interfaces.nsIDragService;
var dragService = XPCU.getService("@mozilla.org/widget/dragservice;1", "nsIDragService");
dragService.invokeDragSession(aTarget, transArray, null, nsIDragService.DRAGDROP_ACTION_MOVE);
},
createTransferableData: function(aValue)
{
var obj = {};
if (typeof(aValue) == "string") {
obj.data = XPCU.createInstance("@mozilla.org/supports-string;1", "nsISupportsString");
obj.data.data = aValue;
obj.size = aValue.length*2;
} else if (false) {
// TODO: create data for other primitive types
}
return obj;
},
checkCanDrop: function(aType)
{
var dragService = XPCU.getService("@mozilla.org/widget/dragservice;1", "nsIDragService");
var dragSession = dragService.getCurrentSession();
var gotFlavor = false;
for (var i = 0; i < arguments.length; ++i)
gotFlavor |= dragSession.isDataFlavorSupported(arguments[i]);
dragSession.canDrop = gotFlavor;
return gotFlavor;
},
getData: function(aType, aIndex)
{
var dragService = XPCU.getService("@mozilla.org/widget/dragservice;1", "nsIDragService");
var dragSession = dragService.getCurrentSession();
var trans = XPCU.createInstance("@mozilla.org/widget/transferable;1", "nsITransferable");
trans.addDataFlavor(aType);
dragSession.getData(trans, aIndex);
var data = new Object();
trans.getAnyTransferData ({}, data, {});
return data.value;
}
};