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/*
* Copyright (C) 2007-2020 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.
*/
#pragma once
#include "DragActions.h"
#include "DragImage.h"
#include "IntPoint.h"
#include "IntRect.h"
#include "SimpleRange.h"
#include <wtf/CompletionHandler.h>
#include <wtf/URL.h>
namespace WebCore {
class DataTransfer;
class Document;
class DragClient;
class DragData;
class Element;
class FrameSelection;
class HTMLImageElement;
class HTMLInputElement;
class HitTestResult;
class IntRect;
class LocalFrame;
class Page;
class PlatformMouseEvent;
struct DragItem;
struct DragState;
struct PromisedAttachmentInfo;
class DragController {
WTF_MAKE_NONCOPYABLE(DragController); WTF_MAKE_FAST_ALLOCATED;
public:
DragController(Page&, std::unique_ptr<DragClient>&&);
~DragController();
static DragOperation platformGenericDragOperation();
WEBCORE_EXPORT std::optional<DragOperation> dragEntered(DragData&&);
WEBCORE_EXPORT void dragExited(DragData&&);
WEBCORE_EXPORT std::optional<DragOperation> dragUpdated(DragData&&);
WEBCORE_EXPORT bool performDragOperation(DragData&&);
WEBCORE_EXPORT void dragCancelled();
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; }
OptionSet<DragOperation> sourceDragOperationMask() const { return m_sourceDragOperationMask; }
const URL& draggingImageURL() const { return m_draggingImageURL; }
void setDragOffset(const IntPoint& offset) { m_dragOffset = offset; }
const IntPoint& dragOffset() const { return m_dragOffset; }
OptionSet<DragSourceAction> dragSourceAction() const { return m_dragSourceAction; }
DragHandlingMethod dragHandlingMethod() const { return m_dragHandlingMethod; }
Document* documentUnderMouse() const { return m_documentUnderMouse.get(); }
OptionSet<DragDestinationAction> dragDestinationActionMask() const { return m_dragDestinationActionMask; }
OptionSet<DragSourceAction> delegateDragSourceAction(const IntPoint& rootViewPoint);
Element* draggableElement(const LocalFrame*, Element* start, const IntPoint&, DragState&) const;
WEBCORE_EXPORT void dragEnded();
WEBCORE_EXPORT void placeDragCaret(const IntPoint&);
const Vector<Ref<HTMLImageElement>>& droppedImagePlaceholders() const { return m_droppedImagePlaceholders; }
const std::optional<SimpleRange>& droppedImagePlaceholderRange() const { return m_droppedImagePlaceholderRange; }
WEBCORE_EXPORT void finalizeDroppedImagePlaceholder(HTMLImageElement&, CompletionHandler<void()>&&);
WEBCORE_EXPORT void insertDroppedImagePlaceholdersAtCaret(const Vector<IntSize>& imageSizes);
void prepareForDragStart(LocalFrame& sourceFrame, OptionSet<DragSourceAction>, Element& sourceElement, DataTransfer&, const IntPoint& dragOrigin) const;
bool startDrag(LocalFrame& src, const DragState&, OptionSet<DragOperation>, const PlatformMouseEvent& dragEvent, const IntPoint& dragOrigin, HasNonDefaultPasteboardData);
static const IntSize& maxDragImageSize();
static const int MaxOriginalImageArea;
static const int DragIconRightInset;
static const int DragIconBottomInset;
static const float DragImageAlpha;
private:
void updateSupportedTypeIdentifiersForDragHandlingMethod(DragHandlingMethod, const DragData&) const;
bool dispatchTextInputEventFor(LocalFrame*, const DragData&);
bool canProcessDrag(const DragData&);
bool concludeEditDrag(const DragData&);
std::optional<DragOperation> dragEnteredOrUpdated(DragData&&);
std::optional<DragOperation> operationForLoad(const DragData&);
DragHandlingMethod tryDocumentDrag(const DragData&, OptionSet<DragDestinationAction>, std::optional<DragOperation>&);
bool tryDHTMLDrag(const DragData&, std::optional<DragOperation>&);
std::optional<DragOperation> dragOperation(const DragData&);
void clearDragCaret();
bool dragIsMove(FrameSelection&, const DragData&);
bool isCopyKeyDown(const DragData&);
void mouseMovedIntoDocument(Document*);
bool shouldUseCachedImageForDragImage(const Image&) const;
void disallowFileAccessIfNeeded(DragData&);
std::optional<HitTestResult> hitTestResultForDragStart(LocalFrame&, Element&, const IntPoint&) const;
void doImageDrag(Element&, const IntPoint&, const IntRect&, LocalFrame&, IntPoint&, const DragState&, PromisedAttachmentInfo&&);
void doSystemDrag(DragImage, const IntPoint&, const IntPoint&, LocalFrame&, const DragState&, PromisedAttachmentInfo&&);
void beginDrag(DragItem, LocalFrame&, const IntPoint& mouseDownPoint, const IntPoint& mouseDraggedPoint, DataTransfer&, DragSourceAction);
bool canLoadDataFromDraggingPasteboard() const
{
#if PLATFORM(IOS_FAMILY)
return m_isPerformingDrop;
#else
return true;
#endif
}
DragClient& client() const { return *m_client; }
bool tryToUpdateDroppedImagePlaceholders(const DragData&);
void removeAllDroppedImagePlaceholders();
void cleanupAfterSystemDrag();
void declareAndWriteDragImage(DataTransfer&, Element&, const URL&, const String& label);
Page& m_page;
std::unique_ptr<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 { 0 };
DragHandlingMethod m_dragHandlingMethod { DragHandlingMethod::None };
OptionSet<DragDestinationAction> m_dragDestinationActionMask;
OptionSet<DragSourceAction> m_dragSourceAction;
bool m_didInitiateDrag { false };
OptionSet<DragOperation> m_sourceDragOperationMask; // Set in startDrag when a drag starts from a mouse down within WebKit.
IntPoint m_dragOffset;
URL m_draggingImageURL;
bool m_isPerformingDrop { false };
Vector<Ref<HTMLImageElement>> m_droppedImagePlaceholders;
std::optional<SimpleRange> m_droppedImagePlaceholderRange;
};
WEBCORE_EXPORT bool isDraggableLink(const Element&);
} // namespace WebCore
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