1 /*
2 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
3 * Copyright (C) 2004, 2005, 2006, 2009, 2010 Apple Inc. All rights reserved.
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
14 *
15 * You should have received a copy of the GNU Library General Public License
16 * along with this library; see the file COPYING.LIB. If not, write to
17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
19 *
20 */
21
22 #ifndef RenderWidget_h
23 #define RenderWidget_h
24
25 #include "OverlapTestRequestClient.h"
26 #include "RenderReplaced.h"
27 #include "Widget.h"
28
29 namespace WebCore {
30
31 class RenderWidget : public RenderReplaced, private OverlapTestRequestClient {
32 public:
33 virtual ~RenderWidget();
34
widget()35 Widget* widget() const { return m_widget.get(); }
36 virtual void setWidget(PassRefPtr<Widget>);
37
38 static RenderWidget* find(const Widget*);
39
40 void updateWidgetPosition();
41 void widgetPositionsUpdated();
42 IntRect windowClipRect() const;
43
44 void showSubstituteImage(PassRefPtr<Image>);
45
46 void notifyWidget(WidgetNotification);
47
48 static void suspendWidgetHierarchyUpdates();
49 static void resumeWidgetHierarchyUpdates();
50
ref()51 RenderArena* ref() { ++m_refCount; return renderArena(); }
52 void deref(RenderArena*);
53
54 protected:
55 RenderWidget(Node*);
56
frameView()57 FrameView* frameView() const { return m_frameView; }
58
59 void clearWidget();
60
61 virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle);
62 virtual void layout();
63 virtual void paint(PaintInfo&, int x, int y);
64
65 private:
isWidget()66 virtual bool isWidget() const { return true; }
67
68 virtual void destroy();
69 virtual void setSelectionState(SelectionState);
70 virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, int x, int y, int tx, int ty, HitTestAction);
71 virtual void setOverlapTestResult(bool);
72
73 bool setWidgetGeometry(const IntRect&, const IntSize&);
74
75 RefPtr<Widget> m_widget;
76 RefPtr<Image> m_substituteImage;
77 FrameView* m_frameView;
78 IntRect m_clipRect; // The rectangle needs to remain correct after scrolling, so it is stored in content view coordinates, and not clipped to window.
79 int m_refCount;
80 };
81
toRenderWidget(RenderObject * object)82 inline RenderWidget* toRenderWidget(RenderObject* object)
83 {
84 ASSERT(!object || object->isWidget());
85 return static_cast<RenderWidget*>(object);
86 }
87
toRenderWidget(const RenderObject * object)88 inline const RenderWidget* toRenderWidget(const RenderObject* object)
89 {
90 ASSERT(!object || object->isWidget());
91 return static_cast<const RenderWidget*>(object);
92 }
93
94 // This will catch anyone doing an unnecessary cast.
95 void toRenderWidget(const RenderWidget*);
96
97 } // namespace WebCore
98
99 #endif // RenderWidget_h
100