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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 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 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 "DragActions.h"
#include "DragImage.h"
#include "IntPoint.h"
#include "URL.h"
namespace WebCore {
class DataTransfer;
class Document;
class DragClient;
class DragData;
class Element;
class Frame;
class FrameSelection;
class HTMLInputElement;
class IntRect;
class Page;
class PlatformMouseEvent;
struct DragState;
class DragController {
WTF_MAKE_NONCOPYABLE(DragController); WTF_MAKE_FAST_ALLOCATED;
public:
DragController(Page&, DragClient&);
~DragController();
static std::unique_ptr<DragController> create(Page&, DragClient&);
DragClient& client() const { return m_client; }
WEBCORE_EXPORT DragOperation dragEntered(DragData&);
WEBCORE_EXPORT void dragExited(DragData&);
WEBCORE_EXPORT DragOperation dragUpdated(DragData&);
WEBCORE_EXPORT bool performDragOperation(DragData&);
bool mouseIsOverFileInput() const { return m_fileInputElementUnderMouse; }
unsigned numberOfItemsToBeAccepted() const { return m_numberOfItemsToBeAccepted; }
// FIXME: It should be possible to remove a number of these accessors once all
// drag logic is in WebCore.
void setDidInitiateDrag(bool initiated) { m_didInitiateDrag = initiated; }
bool didInitiateDrag() const { return m_didInitiateDrag; }
DragOperation sourceDragOperation() const { return m_sourceDragOperation; }
const URL& draggingImageURL() const { return m_draggingImageURL; }
#if ENABLE(ATTACHMENT_ELEMENT)
const URL& draggingAttachmentURL() const { return m_draggingAttachmentURL; }
#endif
void setDragOffset(const IntPoint& offset) { m_dragOffset = offset; }
const IntPoint& dragOffset() const { return m_dragOffset; }
DragSourceAction dragSourceAction() const { return m_dragSourceAction; }
Document* documentUnderMouse() const { return m_documentUnderMouse.get(); }
DragDestinationAction dragDestinationAction() const { return m_dragDestinationAction; }
DragSourceAction delegateDragSourceAction(const IntPoint& rootViewPoint);
Element* draggableElement(const Frame*, Element* start, const IntPoint&, DragState&) const;
WEBCORE_EXPORT void dragEnded();
WEBCORE_EXPORT void placeDragCaret(const IntPoint&);
bool startDrag(Frame& src, const DragState&, DragOperation srcOp, const PlatformMouseEvent& dragEvent, const IntPoint& dragOrigin);
static const IntSize& maxDragImageSize();
static const int LinkDragBorderInset;
static const int MaxOriginalImageArea;
static const int DragIconRightInset;
static const int DragIconBottomInset;
static const float DragImageAlpha;
private:
bool dispatchTextInputEventFor(Frame*, DragData&);
bool canProcessDrag(DragData&);
bool concludeEditDrag(DragData&);
DragOperation dragEnteredOrUpdated(DragData&);
DragOperation operationForLoad(DragData&);
bool tryDocumentDrag(DragData&, DragDestinationAction, DragOperation&);
bool tryDHTMLDrag(DragData&, DragOperation&);
DragOperation dragOperation(DragData&);
void clearDragCaret();
bool dragIsMove(FrameSelection&, DragData&);
bool isCopyKeyDown(DragData&);
void mouseMovedIntoDocument(Document*);
void doImageDrag(Element&, const IntPoint&, const IntRect&, DataTransfer&, Frame&, IntPoint&);
void doSystemDrag(DragImageRef, const IntPoint&, const IntPoint&, DataTransfer&, Frame&, bool forLink);
void cleanupAfterSystemDrag();
void declareAndWriteDragImage(DataTransfer&, Element&, const URL&, const String& label);
#if ENABLE(ATTACHMENT_ELEMENT)
void declareAndWriteAttachment(DataTransfer&, Element&, const URL&);
#endif
Page& m_page;
DragClient& m_client;
RefPtr<Document> m_documentUnderMouse; // The document the mouse was last dragged over.
RefPtr<Document> m_dragInitiator; // The Document (if any) that initiated the drag.
RefPtr<HTMLInputElement> m_fileInputElementUnderMouse;
unsigned m_numberOfItemsToBeAccepted;
bool m_documentIsHandlingDrag;
DragDestinationAction m_dragDestinationAction;
DragSourceAction m_dragSourceAction;
bool m_didInitiateDrag;
DragOperation m_sourceDragOperation; // Set in startDrag when a drag starts from a mouse down within WebKit
IntPoint m_dragOffset;
URL m_draggingImageURL;
#if ENABLE(ATTACHMENT_ELEMENT)
URL m_draggingAttachmentURL;
#endif
};
WEBCORE_EXPORT bool isDraggableLink(const Element&);
}
#endif
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