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114 lines
4.2 KiB
C++
114 lines
4.2 KiB
C++
/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 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 Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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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 Communicator.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications.
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* Portions created by the Initial Developer are Copyright (C) 2002
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Mike Pinkerton <pinkerton@netscape.com>
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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 MPL, 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 MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef nsContentAreaDragDrop_h__
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#define nsContentAreaDragDrop_h__
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#include "nsCOMPtr.h"
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#include "nsIDOMEventTarget.h"
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#include "nsIDOMEventListener.h"
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#include "nsITransferable.h"
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class nsIDOMNode;
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class nsIDOMWindow;
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class nsIDOMDocument;
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class nsIDOMDragEvent;
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class nsISelection;
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class nsITransferable;
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class nsIContent;
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class nsIURI;
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class nsIFile;
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class nsISimpleEnumerator;
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class nsDOMDataTransfer;
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//
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// class nsContentAreaDragDrop, used to generate the dragdata
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//
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class nsContentAreaDragDrop
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{
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public:
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/**
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* Determine what data in the content area, if any, is being dragged.
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*
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* aWindow - the window containing the target node
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* aTarget - the mousedown event target that started the drag
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* aSelectionTargetNode - the node where the drag event should be fired
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* aIsAltKeyPressed - true if the Alt key is pressed. In some cases, this
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* will prevent the drag from occuring. For example,
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* holding down Alt over a link should select the text,
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* not drag the link.
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* aDataTransfer - the dataTransfer for the drag event.
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* aCanDrag - [out] set to true if the drag may proceed, false to stop the
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* drag entirely
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* aDragSelection - [out] set to true to indicate that a selection is being
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* dragged, rather than a specific node
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* aDragNode - [out] the link, image or area being dragged, or null if the
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* drag occurred on another element.
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*/
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static nsresult GetDragData(nsIDOMWindow* aWindow,
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nsIContent* aTarget,
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nsIContent* aSelectionTargetNode,
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PRBool aIsAltKeyPressed,
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nsDOMDataTransfer* aDataTransfer,
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PRBool* aCanDrag,
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PRBool* aDragSelection,
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nsIContent** aDragNode);
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};
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// this is used to save images to disk lazily when the image data is asked for
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// during the drop instead of when it is added to the drag data transfer. This
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// ensures that the image data is only created when an image drop is allowed.
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class nsContentAreaDragDropDataProvider : public nsIFlavorDataProvider
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{
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSIFLAVORDATAPROVIDER
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virtual ~nsContentAreaDragDropDataProvider() {}
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nsresult SaveURIToFile(nsAString& inSourceURIString,
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nsIFile* inDestFile);
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};
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#endif /* nsContentAreaDragDrop_h__ */
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