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/*
* Copyright (C) 2001 Peter Kelly (pmk@post.com)
* Copyright (C) 2001 Tobias Anton (anton@stud.fbi.fh-darmstadt.de)
* Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
* Copyright (C) 2003, 2004, 2005, 2006, 2008 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef DataTransfer_h
#define DataTransfer_h
#include "bindings/core/v8/ScriptWrappable.h"
#include "core/clipboard/DataTransferAccessPolicy.h"
#include "core/fetch/ImageResource.h"
#include "core/fetch/ResourcePtr.h"
#include "core/page/DragActions.h"
#include "platform/geometry/IntPoint.h"
#include "platform/heap/Handle.h"
#include "wtf/Forward.h"
#include "wtf/RefCounted.h"
#include "wtf/RefPtr.h"
#include "wtf/Vector.h"
namespace blink {
class DataObject;
class DataTransferItemList;
class DragImage;
class Element;
class ExceptionState;
class FileList;
class LocalFrame;
class Node;
class Range;
// Used for drag and drop and copy/paste.
// Drag and Drop: http://www.whatwg.org/specs/web-apps/current-work/multipage/dnd.html
// Clipboard API (copy/paste): http://dev.w3.org/2006/webapi/clipops/clipops.html
class DataTransfer : public RefCountedWillBeGarbageCollectedFinalized<DataTransfer>, public ScriptWrappable {
DEFINE_WRAPPERTYPEINFO();
public:
// Whether this transfer is serving a drag-drop or copy-paste request.
enum DataTransferType {
CopyAndPaste,
DragAndDrop,
};
static PassRefPtrWillBeRawPtr<DataTransfer> create(DataTransferType, DataTransferAccessPolicy, PassRefPtrWillBeRawPtr<DataObject>);
~DataTransfer();
bool isForCopyAndPaste() const { return m_transferType == CopyAndPaste; }
bool isForDragAndDrop() const { return m_transferType == DragAndDrop; }
String dropEffect() const { return dropEffectIsUninitialized() ? "none" : m_dropEffect; }
void setDropEffect(const String&);
bool dropEffectIsUninitialized() const { return m_dropEffect == "uninitialized"; }
String effectAllowed() const { return m_effectAllowed; }
void setEffectAllowed(const String&);
void clearData(const String& type = String());
String getData(const String& type) const;
void setData(const String& type, const String& data);
// extensions beyond IE's API
Vector<String> types() const;
FileList* files() const;
IntPoint dragLocation() const { return m_dragLoc; }
void setDragImage(Element*, int x, int y, ExceptionState&);
void clearDragImage();
ImageResource* dragImageResource() const { return m_dragImage.get(); }
void setDragImageResource(ImageResource*, const IntPoint&);
Node* dragImageElement() const { return m_dragImageElement.get(); }
void setDragImageElement(Node*, const IntPoint&);
PassOwnPtr<DragImage> createDragImage(IntPoint& dragLocation, LocalFrame*) const;
void declareAndWriteDragImage(Element*, const KURL&, const String& title);
void writeURL(const KURL&, const String&);
void writeRange(Range*, LocalFrame*);
void writePlainText(const String&);
bool hasData();
void setAccessPolicy(DataTransferAccessPolicy);
bool canReadTypes() const;
bool canReadData() const;
bool canWriteData() const;
// Note that the spec doesn't actually allow drag image modification outside the dragstart
// event. This capability is maintained for backwards compatiblity for ports that have
// supported this in the past. On many ports, attempting to set a drag image outside the
// dragstart operation is a no-op anyway.
bool canSetDragImage() const;
DragOperation sourceOperation() const;
DragOperation destinationOperation() const;
void setSourceOperation(DragOperation);
void setDestinationOperation(DragOperation);
bool hasDropZoneType(const String&);
PassRefPtrWillBeRawPtr<DataTransferItemList> items();
PassRefPtrWillBeRawPtr<DataObject> dataObject() const;
void trace(Visitor*);
private:
DataTransfer(DataTransferType, DataTransferAccessPolicy, PassRefPtrWillBeRawPtr<DataObject>);
void setDragImage(ImageResource*, Node*, const IntPoint&);
bool hasFileOfType(const String&) const;
bool hasStringOfType(const String&) const;
// Instead of using this member directly, prefer to use the can*() methods above.
DataTransferAccessPolicy m_policy;
String m_dropEffect;
String m_effectAllowed;
DataTransferType m_transferType;
RefPtrWillBeMember<DataObject> m_dataObject;
IntPoint m_dragLoc;
ResourcePtr<ImageResource> m_dragImage;
RefPtrWillBeMember<Node> m_dragImageElement;
};
DragOperation convertDropZoneOperationToDragOperation(const String& dragOperation);
String convertDragOperationToDropZoneOperation(DragOperation);
} // namespace blink
#endif // DataTransfer_h
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