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 { 51 WTF_MAKE_NONCOPYABLE(DragController); WTF_MAKE_FAST_ALLOCATED; 52 public: 53 DragController(Page*, DragClient*); 54 ~DragController(); client()55 DragClient* client() const { return m_client; } 56 57 DragOperation dragEntered(DragData*); 58 void dragExited(DragData*); 59 DragOperation dragUpdated(DragData*); 60 bool performDrag(DragData*); 61 62 // FIXME: It should be possible to remove a number of these accessors once all 63 // drag logic is in WebCore. setDidInitiateDrag(bool initiated)64 void setDidInitiateDrag(bool initiated) { m_didInitiateDrag = initiated; } didInitiateDrag()65 bool didInitiateDrag() const { return m_didInitiateDrag; } setIsHandlingDrag(bool handling)66 void setIsHandlingDrag(bool handling) { m_isHandlingDrag = handling; } isHandlingDrag()67 bool isHandlingDrag() const { return m_isHandlingDrag; } sourceDragOperation()68 DragOperation sourceDragOperation() const { return m_sourceDragOperation; } draggingImageURL()69 const KURL& draggingImageURL() const { return m_draggingImageURL; } setDragOffset(const IntPoint & offset)70 void setDragOffset(const IntPoint& offset) { m_dragOffset = offset; } dragOffset()71 const IntPoint& dragOffset() const { return m_dragOffset; } dragSourceAction()72 DragSourceAction dragSourceAction() const { return m_dragSourceAction; } 73 documentUnderMouse()74 Document* documentUnderMouse() const { return m_documentUnderMouse.get(); } dragDestinationAction()75 DragDestinationAction dragDestinationAction() const { return m_dragDestinationAction; } 76 DragSourceAction delegateDragSourceAction(const IntPoint& pagePoint); 77 78 bool mayStartDragAtEventLocation(const Frame*, const IntPoint& framePos, Node*); 79 void dragEnded(); 80 81 void placeDragCaret(const IntPoint&); 82 83 bool startDrag(Frame* src, Clipboard*, DragOperation srcOp, const PlatformMouseEvent& dragEvent, const IntPoint& dragOrigin, bool isDHTMLDrag); 84 static const IntSize& maxDragImageSize(); 85 86 static const int LinkDragBorderInset; 87 static const int MaxOriginalImageArea; 88 static const int DragIconRightInset; 89 static const int DragIconBottomInset; 90 static const float DragImageAlpha; 91 92 private: 93 bool dispatchTextInputEventFor(Frame*, DragData*); 94 bool canProcessDrag(DragData*); 95 bool concludeEditDrag(DragData*); 96 DragOperation dragEnteredOrUpdated(DragData*); 97 DragOperation operationForLoad(DragData*); 98 bool tryDocumentDrag(DragData*, DragDestinationAction, DragOperation&); 99 bool tryDHTMLDrag(DragData*, DragOperation&); 100 DragOperation dragOperation(DragData*); 101 void cancelDrag(); 102 bool dragIsMove(SelectionController*, DragData*); 103 bool isCopyKeyDown(DragData*); 104 105 void mouseMovedIntoDocument(Document*); 106 107 IntRect selectionDraggingRect(Frame*); 108 bool doDrag(Frame* src, Clipboard* clipboard, DragImageRef dragImage, const KURL& linkURL, const KURL& imageURL, Node* node, IntPoint& dragLoc, IntPoint& dragImageOffset); 109 void doImageDrag(Element*, const IntPoint&, const IntRect&, Clipboard*, Frame*, IntPoint&); 110 void doSystemDrag(DragImageRef, const IntPoint&, const IntPoint&, Clipboard*, Frame*, bool forLink); 111 void cleanupAfterSystemDrag(); 112 113 Page* m_page; 114 DragClient* m_client; 115 116 RefPtr<Document> m_documentUnderMouse; // The document the mouse was last dragged over. 117 RefPtr<Document> m_dragInitiator; // The Document (if any) that initiated the drag. 118 119 DragDestinationAction m_dragDestinationAction; 120 DragSourceAction m_dragSourceAction; 121 bool m_didInitiateDrag; 122 bool m_isHandlingDrag; 123 DragOperation m_sourceDragOperation; // Set in startDrag when a drag starts from a mouse down within WebKit 124 IntPoint m_dragOffset; 125 KURL m_draggingImageURL; 126 }; 127 128 } 129 130 #endif 131