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/*
* Copyright (C) 2007, 2009 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef DragController_h
#define DragController_h
#include "core/CoreExport.h"
#include "core/events/EventTarget.h"
#include "core/page/DragActions.h"
#include "platform/geometry/IntPoint.h"
#include "platform/heap/Handle.h"
#include "platform/weborigin/KURL.h"
#include "wtf/Forward.h"
namespace blink {
class DataTransfer;
class Document;
class DragData;
class DragImage;
struct DragSession;
class DragState;
class LocalFrame;
class FrameSelection;
class HTMLInputElement;
class Node;
class Page;
class PlatformMouseEvent;
class CORE_EXPORT DragController final
: public GarbageCollected<DragController> {
WTF_MAKE_NONCOPYABLE(DragController);
public:
static DragController* create(Page*);
DragSession dragEnteredOrUpdated(DragData*, LocalFrame& localRoot);
void dragExited(DragData*, LocalFrame& localRoot);
bool performDrag(DragData*, LocalFrame& localRoot);
enum SelectionDragPolicy {
ImmediateSelectionDragResolution,
DelayedSelectionDragResolution,
};
Node* draggableNode(const LocalFrame*,
Node*,
const IntPoint&,
SelectionDragPolicy,
DragSourceAction&) const;
void dragEnded();
bool populateDragDataTransfer(LocalFrame* src,
const DragState&,
const IntPoint& dragOrigin);
bool startDrag(LocalFrame* src,
const DragState&,
const PlatformMouseEvent& dragEvent,
const IntPoint& dragOrigin);
DECLARE_TRACE();
private:
DragController(Page*);
DispatchEventResult dispatchTextInputEventFor(LocalFrame*, DragData*);
bool canProcessDrag(DragData*, LocalFrame& localRoot);
bool concludeEditDrag(DragData*);
DragOperation operationForLoad(DragData*, LocalFrame& localRoot);
bool tryDocumentDrag(DragData*,
DragDestinationAction,
DragSession&,
LocalFrame& localRoot);
bool tryDHTMLDrag(DragData*, DragOperation&, LocalFrame& localRoot);
DragOperation dragOperation(DragData*);
void cancelDrag();
bool dragIsMove(FrameSelection&, DragData*);
bool isCopyKeyDown(DragData*);
void mouseMovedIntoDocument(Document*);
void doSystemDrag(DragImage*,
const IntPoint& dragLocation,
const IntPoint& dragOrigin,
DataTransfer*,
LocalFrame*,
bool forLink);
Member<Page> m_page;
// The document the mouse was last dragged over.
Member<Document> m_documentUnderMouse;
// The Document (if any) that initiated the drag.
Member<Document> m_dragInitiator;
Member<HTMLInputElement> m_fileInputElementUnderMouse;
bool m_documentIsHandlingDrag;
DragDestinationAction m_dragDestinationAction;
bool m_didInitiateDrag;
};
} // namespace blink
#endif // DragController_h
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