1 /* 2 * Copyright (C) 2007, 2009 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef DragController_h 27 #define DragController_h 28 29 #include "DragActions.h" 30 #include "DragImage.h" 31 #include "IntPoint.h" 32 #include "KURL.h" 33 34 namespace WebCore { 35 36 class Clipboard; 37 class Document; 38 class DragClient; 39 class DragData; 40 class Element; 41 class Frame; 42 class Image; 43 class IntRect; 44 class Node; 45 class Page; 46 class PlatformMouseEvent; 47 class Range; 48 class SelectionController; 49 50 class DragController : public Noncopyable { 51 public: 52 DragController(Page*, DragClient*); 53 ~DragController(); client()54 DragClient* client() const { return m_client; } 55 56 DragOperation dragEntered(DragData*); 57 void dragExited(DragData*); 58 DragOperation dragUpdated(DragData*); 59 bool performDrag(DragData*); 60 61 // FIXME: It should be possible to remove a number of these accessors once all 62 // drag logic is in WebCore. setDidInitiateDrag(bool initiated)63 void setDidInitiateDrag(bool initiated) { m_didInitiateDrag = initiated; } didInitiateDrag()64 bool didInitiateDrag() const { return m_didInitiateDrag; } setIsHandlingDrag(bool handling)65 void setIsHandlingDrag(bool handling) { m_isHandlingDrag = handling; } isHandlingDrag()66 bool isHandlingDrag() const { return m_isHandlingDrag; } sourceDragOperation()67 DragOperation sourceDragOperation() const { return m_sourceDragOperation; } setDraggingImageURL(const KURL & url)68 void setDraggingImageURL(const KURL& url) { m_draggingImageURL = url; } draggingImageURL()69 const KURL& draggingImageURL() const { return m_draggingImageURL; } setDragInitiator(Document * initiator)70 void setDragInitiator(Document* initiator) { m_dragInitiator = initiator; m_didInitiateDrag = true; } dragInitiator()71 Document* dragInitiator() const { return m_dragInitiator; } setDragOffset(const IntPoint & offset)72 void setDragOffset(const IntPoint& offset) { m_dragOffset = offset; } dragOffset()73 const IntPoint& dragOffset() const { return m_dragOffset; } dragSourceAction()74 DragSourceAction dragSourceAction() const { return m_dragSourceAction; } 75 documentUnderMouse()76 Document* documentUnderMouse() const { return m_documentUnderMouse; } dragDestinationAction()77 DragDestinationAction dragDestinationAction() const { return m_dragDestinationAction; } 78 DragSourceAction delegateDragSourceAction(const IntPoint& pagePoint); 79 80 bool mayStartDragAtEventLocation(const Frame*, const IntPoint& framePos); 81 void dragEnded(); 82 83 void placeDragCaret(const IntPoint&); 84 85 bool startDrag(Frame* src, Clipboard*, DragOperation srcOp, const PlatformMouseEvent& dragEvent, const IntPoint& dragOrigin, bool isDHTMLDrag); 86 static const IntSize& maxDragImageSize(); 87 88 static const int LinkDragBorderInset; 89 static const int MaxOriginalImageArea; 90 static const int DragIconRightInset; 91 static const int DragIconBottomInset; 92 static const float DragImageAlpha; 93 94 private: 95 bool canProcessDrag(DragData*); 96 bool concludeEditDrag(DragData*); 97 DragOperation dragEnteredOrUpdated(DragData*); 98 DragOperation operationForLoad(DragData*); 99 bool tryDocumentDrag(DragData*, DragDestinationAction, DragOperation&); 100 bool tryDHTMLDrag(DragData*, DragOperation&); 101 DragOperation dragOperation(DragData*); 102 void cancelDrag(); 103 bool dragIsMove(SelectionController*); 104 bool isCopyKeyDown(); 105 106 void mouseMovedIntoDocument(Document*); 107 108 IntRect selectionDraggingRect(Frame*); 109 bool doDrag(Frame* src, Clipboard* clipboard, DragImageRef dragImage, const KURL& linkURL, const KURL& imageURL, Node* node, IntPoint& dragLoc, IntPoint& dragImageOffset); 110 void doImageDrag(Element*, const IntPoint&, const IntRect&, Clipboard*, Frame*, IntPoint&); 111 void doSystemDrag(DragImageRef, const IntPoint&, const IntPoint&, Clipboard*, Frame*, bool forLink); 112 void cleanupAfterSystemDrag(); 113 114 Page* m_page; 115 DragClient* m_client; 116 117 Document* m_documentUnderMouse; // The document the mouse was last dragged over. 118 Document* m_dragInitiator; // The Document (if any) that initiated the drag. 119 120 DragDestinationAction m_dragDestinationAction; 121 DragSourceAction m_dragSourceAction; 122 bool m_didInitiateDrag; 123 bool m_isHandlingDrag; 124 DragOperation m_sourceDragOperation; // Set in startDrag when a drag starts from a mouse down within WebKit 125 IntPoint m_dragOffset; 126 KURL m_draggingImageURL; 127 }; 128 129 } 130 131 #endif 132