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 29namespace WebCore { 30 31class WidgetHierarchyUpdatesSuspensionScope { 32public: 33 WidgetHierarchyUpdatesSuspensionScope() 34 { 35 s_widgetHierarchyUpdateSuspendCount++; 36 } 37 ~WidgetHierarchyUpdatesSuspensionScope() 38 { 39 ASSERT(s_widgetHierarchyUpdateSuspendCount); 40 if (s_widgetHierarchyUpdateSuspendCount == 1) 41 moveWidgets(); 42 s_widgetHierarchyUpdateSuspendCount--; 43 } 44 45 static bool isSuspended() { return s_widgetHierarchyUpdateSuspendCount; } 46 static void scheduleWidgetToMove(Widget* widget, FrameView* frame) { widgetNewParentMap().set(widget, frame); } 47 48private: 49 typedef HashMap<RefPtr<Widget>, FrameView*> WidgetToParentMap; 50 static WidgetToParentMap& widgetNewParentMap(); 51 52 void moveWidgets(); 53 54 static unsigned s_widgetHierarchyUpdateSuspendCount; 55}; 56 57class RenderWidget : public RenderReplaced, private OverlapTestRequestClient { 58public: 59 virtual ~RenderWidget(); 60 61 Widget* widget() const { return m_widget.get(); } 62 virtual void setWidget(PassRefPtr<Widget>); 63 64 static RenderWidget* find(const Widget*); 65 66 void updateWidgetPosition(); 67 void widgetPositionsUpdated(); 68 IntRect windowClipRect() const; 69 70 void notifyWidget(WidgetNotification); 71 72 RenderArena* ref() { ++m_refCount; return renderArena(); } 73 void deref(RenderArena*); 74 75protected: 76 RenderWidget(Element*); 77 78 FrameView* frameView() const { return m_frameView; } 79 80 void clearWidget(); 81 82 virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle); 83 virtual void layout(); 84 virtual void paint(PaintInfo&, const LayoutPoint&); 85 virtual CursorDirective getCursor(const LayoutPoint&, Cursor&) const; 86 virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction) OVERRIDE; 87 88 virtual void paintContents(PaintInfo&, const LayoutPoint&); 89 90private: 91 virtual bool isWidget() const { return true; } 92 93 virtual void willBeDestroyed(); 94 virtual void destroy(); 95 virtual void setSelectionState(SelectionState); 96 virtual void setOverlapTestResult(bool); 97 98 bool setWidgetGeometry(const LayoutRect&); 99 bool updateWidgetGeometry(); 100 101 RefPtr<Widget> m_widget; 102 FrameView* m_frameView; 103 IntRect m_clipRect; // The rectangle needs to remain correct after scrolling, so it is stored in content view coordinates, and not clipped to window. 104 int m_refCount; 105}; 106 107inline RenderWidget* toRenderWidget(RenderObject* object) 108{ 109 ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isWidget()); 110 return static_cast<RenderWidget*>(object); 111} 112 113inline const RenderWidget* toRenderWidget(const RenderObject* object) 114{ 115 ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isWidget()); 116 return static_cast<const RenderWidget*>(object); 117} 118 119// This will catch anyone doing an unnecessary cast. 120void toRenderWidget(const RenderWidget*); 121 122} // namespace WebCore 123 124#endif // RenderWidget_h 125