172 lines
7.4 KiB
C++
172 lines
7.4 KiB
C++
/*
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* Copyright (C) 2007-2020 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "DragActions.h"
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#include "DragImage.h"
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#include "IntPoint.h"
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#include "IntRect.h"
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#include "SimpleRange.h"
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#include <wtf/CompletionHandler.h>
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#include <wtf/URL.h>
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namespace WebCore {
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class DataTransfer;
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class Document;
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class DragClient;
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class DragData;
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class Element;
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class Frame;
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class FrameSelection;
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class HTMLImageElement;
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class HTMLInputElement;
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class HitTestResult;
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class IntRect;
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class Page;
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class PlatformMouseEvent;
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struct DragItem;
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struct DragState;
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struct PromisedAttachmentInfo;
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class DragController {
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WTF_MAKE_NONCOPYABLE(DragController); WTF_MAKE_FAST_ALLOCATED;
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public:
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DragController(Page&, std::unique_ptr<DragClient>&&);
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~DragController();
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static DragOperation platformGenericDragOperation();
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WEBCORE_EXPORT std::optional<DragOperation> dragEntered(const DragData&);
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WEBCORE_EXPORT void dragExited(const DragData&);
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WEBCORE_EXPORT std::optional<DragOperation> dragUpdated(const DragData&);
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WEBCORE_EXPORT bool performDragOperation(const DragData&);
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WEBCORE_EXPORT void dragCancelled();
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bool mouseIsOverFileInput() const { return m_fileInputElementUnderMouse; }
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unsigned numberOfItemsToBeAccepted() const { return m_numberOfItemsToBeAccepted; }
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// FIXME: It should be possible to remove a number of these accessors once all
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// drag logic is in WebCore.
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void setDidInitiateDrag(bool initiated) { m_didInitiateDrag = initiated; }
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bool didInitiateDrag() const { return m_didInitiateDrag; }
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OptionSet<DragOperation> sourceDragOperationMask() const { return m_sourceDragOperationMask; }
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const URL& draggingImageURL() const { return m_draggingImageURL; }
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void setDragOffset(const IntPoint& offset) { m_dragOffset = offset; }
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const IntPoint& dragOffset() const { return m_dragOffset; }
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OptionSet<DragSourceAction> dragSourceAction() const { return m_dragSourceAction; }
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DragHandlingMethod dragHandlingMethod() const { return m_dragHandlingMethod; }
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Document* documentUnderMouse() const { return m_documentUnderMouse.get(); }
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OptionSet<DragDestinationAction> dragDestinationActionMask() const { return m_dragDestinationActionMask; }
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OptionSet<DragSourceAction> delegateDragSourceAction(const IntPoint& rootViewPoint);
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Element* draggableElement(const Frame*, Element* start, const IntPoint&, DragState&) const;
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WEBCORE_EXPORT void dragEnded();
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WEBCORE_EXPORT void placeDragCaret(const IntPoint&);
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const Vector<Ref<HTMLImageElement>>& droppedImagePlaceholders() const { return m_droppedImagePlaceholders; }
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const std::optional<SimpleRange>& droppedImagePlaceholderRange() const { return m_droppedImagePlaceholderRange; }
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WEBCORE_EXPORT void finalizeDroppedImagePlaceholder(HTMLImageElement&, CompletionHandler<void()>&&);
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WEBCORE_EXPORT void insertDroppedImagePlaceholdersAtCaret(const Vector<IntSize>& imageSizes);
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void prepareForDragStart(Frame& sourceFrame, OptionSet<DragSourceAction>, Element& sourceElement, DataTransfer&, const IntPoint& dragOrigin) const;
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bool startDrag(Frame& src, const DragState&, OptionSet<DragOperation>, const PlatformMouseEvent& dragEvent, const IntPoint& dragOrigin, HasNonDefaultPasteboardData);
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static const IntSize& maxDragImageSize();
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static const int MaxOriginalImageArea;
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static const int DragIconRightInset;
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static const int DragIconBottomInset;
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static const float DragImageAlpha;
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private:
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void updateSupportedTypeIdentifiersForDragHandlingMethod(DragHandlingMethod, const DragData&) const;
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bool dispatchTextInputEventFor(Frame*, const DragData&);
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bool canProcessDrag(const DragData&);
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bool concludeEditDrag(const DragData&);
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std::optional<DragOperation> dragEnteredOrUpdated(const DragData&);
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std::optional<DragOperation> operationForLoad(const DragData&);
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DragHandlingMethod tryDocumentDrag(const DragData&, OptionSet<DragDestinationAction>, std::optional<DragOperation>&);
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bool tryDHTMLDrag(const DragData&, std::optional<DragOperation>&);
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std::optional<DragOperation> dragOperation(const DragData&);
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void clearDragCaret();
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bool dragIsMove(FrameSelection&, const DragData&);
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bool isCopyKeyDown(const DragData&);
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void mouseMovedIntoDocument(Document*);
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bool shouldUseCachedImageForDragImage(const Image&) const;
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std::optional<HitTestResult> hitTestResultForDragStart(Frame&, Element&, const IntPoint&) const;
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void doImageDrag(Element&, const IntPoint&, const IntRect&, Frame&, IntPoint&, const DragState&, PromisedAttachmentInfo&&);
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void doSystemDrag(DragImage, const IntPoint&, const IntPoint&, Frame&, const DragState&, PromisedAttachmentInfo&&);
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void beginDrag(DragItem, Frame&, const IntPoint& mouseDownPoint, const IntPoint& mouseDraggedPoint, DataTransfer&, DragSourceAction);
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bool canLoadDataFromDraggingPasteboard() const
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{
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#if PLATFORM(IOS_FAMILY)
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return m_isPerformingDrop;
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#else
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return true;
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#endif
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}
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DragClient& client() const { return *m_client; }
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bool tryToUpdateDroppedImagePlaceholders(const DragData&);
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void removeAllDroppedImagePlaceholders();
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void cleanupAfterSystemDrag();
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void declareAndWriteDragImage(DataTransfer&, Element&, const URL&, const String& label);
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Page& m_page;
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std::unique_ptr<DragClient> m_client;
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RefPtr<Document> m_documentUnderMouse; // The document the mouse was last dragged over.
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RefPtr<Document> m_dragInitiator; // The Document (if any) that initiated the drag.
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RefPtr<HTMLInputElement> m_fileInputElementUnderMouse;
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unsigned m_numberOfItemsToBeAccepted { 0 };
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DragHandlingMethod m_dragHandlingMethod { DragHandlingMethod::None };
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OptionSet<DragDestinationAction> m_dragDestinationActionMask;
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OptionSet<DragSourceAction> m_dragSourceAction;
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bool m_didInitiateDrag { false };
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OptionSet<DragOperation> m_sourceDragOperationMask; // Set in startDrag when a drag starts from a mouse down within WebKit.
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IntPoint m_dragOffset;
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URL m_draggingImageURL;
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bool m_isPerformingDrop { false };
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Vector<Ref<HTMLImageElement>> m_droppedImagePlaceholders;
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std::optional<SimpleRange> m_droppedImagePlaceholderRange;
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};
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WEBCORE_EXPORT bool isDraggableLink(const Element&);
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} // namespace WebCore
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