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 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 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 | #pragma once |
27 | |
28 | #include "DragActions.h" |
29 | #include "DragImage.h" |
30 | #include "IntPoint.h" |
31 | #include "IntRect.h" |
32 | #include <wtf/URL.h> |
33 | |
34 | namespace WebCore { |
35 | |
36 | class DataTransfer; |
37 | class Document; |
38 | class DragClient; |
39 | class DragData; |
40 | class Element; |
41 | class Frame; |
42 | class FrameSelection; |
43 | class HTMLInputElement; |
44 | class IntRect; |
45 | class Page; |
46 | class PlatformMouseEvent; |
47 | |
48 | struct DragItem; |
49 | struct DragState; |
50 | struct PromisedAttachmentInfo; |
51 | |
52 | class DragController { |
53 | WTF_MAKE_NONCOPYABLE(DragController); WTF_MAKE_FAST_ALLOCATED; |
54 | public: |
55 | DragController(Page&, DragClient&); |
56 | ~DragController(); |
57 | |
58 | static std::unique_ptr<DragController> create(Page&, DragClient&); |
59 | static DragOperation platformGenericDragOperation(); |
60 | |
61 | DragClient& client() const { return m_client; } |
62 | |
63 | WEBCORE_EXPORT DragOperation dragEntered(const DragData&); |
64 | WEBCORE_EXPORT void dragExited(const DragData&); |
65 | WEBCORE_EXPORT DragOperation dragUpdated(const DragData&); |
66 | WEBCORE_EXPORT bool performDragOperation(const DragData&); |
67 | WEBCORE_EXPORT void dragCancelled(); |
68 | |
69 | bool mouseIsOverFileInput() const { return m_fileInputElementUnderMouse; } |
70 | unsigned numberOfItemsToBeAccepted() const { return m_numberOfItemsToBeAccepted; } |
71 | |
72 | // FIXME: It should be possible to remove a number of these accessors once all |
73 | // drag logic is in WebCore. |
74 | void setDidInitiateDrag(bool initiated) { m_didInitiateDrag = initiated; } |
75 | bool didInitiateDrag() const { return m_didInitiateDrag; } |
76 | DragOperation sourceDragOperation() const { return m_sourceDragOperation; } |
77 | const URL& draggingImageURL() const { return m_draggingImageURL; } |
78 | void setDragOffset(const IntPoint& offset) { m_dragOffset = offset; } |
79 | const IntPoint& dragOffset() const { return m_dragOffset; } |
80 | DragSourceAction dragSourceAction() const { return m_dragSourceAction; } |
81 | DragHandlingMethod dragHandlingMethod() const { return m_dragHandlingMethod; } |
82 | |
83 | Document* documentUnderMouse() const { return m_documentUnderMouse.get(); } |
84 | DragDestinationAction dragDestinationAction() const { return m_dragDestinationAction; } |
85 | DragSourceAction delegateDragSourceAction(const IntPoint& rootViewPoint); |
86 | |
87 | Element* draggableElement(const Frame*, Element* start, const IntPoint&, DragState&) const; |
88 | WEBCORE_EXPORT void dragEnded(); |
89 | |
90 | WEBCORE_EXPORT void placeDragCaret(const IntPoint&); |
91 | |
92 | bool startDrag(Frame& src, const DragState&, DragOperation srcOp, const PlatformMouseEvent& dragEvent, const IntPoint& dragOrigin, HasNonDefaultPasteboardData); |
93 | static const IntSize& maxDragImageSize(); |
94 | |
95 | static const int MaxOriginalImageArea; |
96 | static const int DragIconRightInset; |
97 | static const int DragIconBottomInset; |
98 | static const float DragImageAlpha; |
99 | |
100 | private: |
101 | void updateSupportedTypeIdentifiersForDragHandlingMethod(DragHandlingMethod, const DragData&) const; |
102 | bool dispatchTextInputEventFor(Frame*, const DragData&); |
103 | bool canProcessDrag(const DragData&); |
104 | bool concludeEditDrag(const DragData&); |
105 | DragOperation dragEnteredOrUpdated(const DragData&); |
106 | DragOperation operationForLoad(const DragData&); |
107 | DragHandlingMethod tryDocumentDrag(const DragData&, DragDestinationAction, DragOperation&); |
108 | bool tryDHTMLDrag(const DragData&, DragOperation&); |
109 | DragOperation dragOperation(const DragData&); |
110 | void clearDragCaret(); |
111 | bool dragIsMove(FrameSelection&, const DragData&); |
112 | bool isCopyKeyDown(const DragData&); |
113 | |
114 | void mouseMovedIntoDocument(Document*); |
115 | bool shouldUseCachedImageForDragImage(const Image&) const; |
116 | |
117 | void doImageDrag(Element&, const IntPoint&, const IntRect&, Frame&, IntPoint&, const DragState&, PromisedAttachmentInfo&&); |
118 | void doSystemDrag(DragImage, const IntPoint&, const IntPoint&, Frame&, const DragState&, PromisedAttachmentInfo&&); |
119 | |
120 | void beginDrag(DragItem, Frame&, const IntPoint& mouseDownPoint, const IntPoint& mouseDraggedPoint, DataTransfer&, DragSourceAction); |
121 | |
122 | bool canLoadDataFromDraggingPasteboard() const |
123 | { |
124 | #if ENABLE(DATA_INTERACTION) |
125 | return m_isPerformingDrop; |
126 | #else |
127 | return true; |
128 | #endif |
129 | } |
130 | |
131 | String platformContentTypeForBlobType(const String& type) const; |
132 | |
133 | void cleanupAfterSystemDrag(); |
134 | void declareAndWriteDragImage(DataTransfer&, Element&, const URL&, const String& label); |
135 | |
136 | #if ENABLE(ATTACHMENT_ELEMENT) |
137 | PromisedAttachmentInfo promisedAttachmentInfo(Frame&, Element&); |
138 | #endif |
139 | Page& m_page; |
140 | DragClient& m_client; |
141 | |
142 | RefPtr<Document> m_documentUnderMouse; // The document the mouse was last dragged over. |
143 | RefPtr<Document> m_dragInitiator; // The Document (if any) that initiated the drag. |
144 | RefPtr<HTMLInputElement> m_fileInputElementUnderMouse; |
145 | unsigned m_numberOfItemsToBeAccepted; |
146 | DragHandlingMethod m_dragHandlingMethod { DragHandlingMethod::None }; |
147 | |
148 | DragDestinationAction m_dragDestinationAction; |
149 | DragSourceAction m_dragSourceAction; |
150 | bool m_didInitiateDrag; |
151 | DragOperation m_sourceDragOperation; // Set in startDrag when a drag starts from a mouse down within WebKit |
152 | IntPoint m_dragOffset; |
153 | URL m_draggingImageURL; |
154 | bool m_isPerformingDrop { false }; |
155 | }; |
156 | |
157 | WEBCORE_EXPORT bool isDraggableLink(const Element&); |
158 | |
159 | } // namespace WebCore |
160 | |