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 "core/page/DragActions.h" 30 #include "platform/geometry/IntPoint.h" 31 #include "platform/weborigin/KURL.h" 32 #include "wtf/Forward.h" 33 34 namespace WebCore { 35 36 class Clipboard; 37 class Document; 38 class DragClient; 39 class DragData; 40 class DragImage; 41 struct DragSession; 42 struct DragState; 43 class Element; 44 class Frame; 45 class FrameSelection; 46 class HTMLInputElement; 47 class Image; 48 class IntRect; 49 class Node; 50 class Page; 51 class PlatformMouseEvent; 52 class Range; 53 54 class DragController { 55 WTF_MAKE_NONCOPYABLE(DragController); WTF_MAKE_FAST_ALLOCATED; 56 public: 57 ~DragController(); 58 59 static PassOwnPtr<DragController> create(Page*, DragClient*); 60 61 DragSession dragEntered(DragData*); 62 void dragExited(DragData*); 63 DragSession dragUpdated(DragData*); 64 bool performDrag(DragData*); 65 66 enum SelectionDragPolicy { 67 ImmediateSelectionDragResolution, 68 DelayedSelectionDragResolution, 69 }; 70 Node* draggableNode(const Frame*, Node*, const IntPoint&, SelectionDragPolicy, DragSourceAction&) const; 71 void dragEnded(); 72 73 bool populateDragClipboard(Frame* src, const DragState&, const IntPoint& dragOrigin); 74 bool startDrag(Frame* src, const DragState&, const PlatformMouseEvent& dragEvent, const IntPoint& dragOrigin); 75 76 static const int DragIconRightInset; 77 static const int DragIconBottomInset; 78 79 private: 80 DragController(Page*, DragClient*); 81 82 bool dispatchTextInputEventFor(Frame*, DragData*); 83 bool canProcessDrag(DragData*); 84 bool concludeEditDrag(DragData*); 85 DragSession dragEnteredOrUpdated(DragData*); 86 DragOperation operationForLoad(DragData*); 87 bool tryDocumentDrag(DragData*, DragDestinationAction, DragSession&); 88 bool tryDHTMLDrag(DragData*, DragOperation&); 89 DragOperation dragOperation(DragData*); 90 void cancelDrag(); 91 bool dragIsMove(FrameSelection&, DragData*); 92 bool isCopyKeyDown(DragData*); 93 94 void mouseMovedIntoDocument(Document*); 95 96 void doSystemDrag(DragImage*, const IntPoint& dragLocation, const IntPoint& dragOrigin, Clipboard*, Frame*, bool forLink); 97 void cleanupAfterSystemDrag(); 98 99 Page* m_page; 100 DragClient* m_client; 101 102 RefPtr<Document> m_documentUnderMouse; // The document the mouse was last dragged over. 103 RefPtr<Document> m_dragInitiator; // The Document (if any) that initiated the drag. 104 RefPtr<HTMLInputElement> m_fileInputElementUnderMouse; 105 bool m_documentIsHandlingDrag; 106 107 DragDestinationAction m_dragDestinationAction; 108 bool m_didInitiateDrag; 109 }; 110 111 } 112 113 #endif 114