1 /* 2 * Copyright (C) 1999 Lars Knoll (knoll (at) 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 "core/platform/Widget.h" 26 #include "core/rendering/RenderReplaced.h" 27 28 namespace WebCore { 29 30 class WidgetHierarchyUpdatesSuspensionScope { 31 public: 32 WidgetHierarchyUpdatesSuspensionScope() 33 { 34 s_widgetHierarchyUpdateSuspendCount++; 35 } 36 ~WidgetHierarchyUpdatesSuspensionScope() 37 { 38 ASSERT(s_widgetHierarchyUpdateSuspendCount); 39 if (s_widgetHierarchyUpdateSuspendCount == 1) 40 moveWidgets(); 41 s_widgetHierarchyUpdateSuspendCount--; 42 } 43 44 static bool isSuspended() { return s_widgetHierarchyUpdateSuspendCount; } 45 static void scheduleWidgetToMove(Widget* widget, FrameView* frame) { widgetNewParentMap().set(widget, frame); } 46 47 private: 48 typedef HashMap<RefPtr<Widget>, FrameView*> WidgetToParentMap; 49 static WidgetToParentMap& widgetNewParentMap(); 50 51 void moveWidgets(); 52 53 static unsigned s_widgetHierarchyUpdateSuspendCount; 54 }; 55 56 class RenderWidget : public RenderReplaced { 57 public: 58 virtual ~RenderWidget(); 59 60 Widget* widget() const { return m_widget.get(); } 61 virtual void setWidget(PassRefPtr<Widget>); 62 63 static RenderWidget* find(const Widget*); 64 65 void updateWidgetPosition(); 66 void widgetPositionsUpdated(); 67 IntRect windowClipRect() const; 68 69 void setIsOverlapped(bool); 70 71 void ref() { ++m_refCount; } 72 void deref(); 73 74 protected: 75 RenderWidget(Element*); 76 77 FrameView* frameView() const { return m_frameView; } 78 79 void clearWidget(); 80 81 virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle) OVERRIDE FINAL; 82 virtual void layout(); 83 virtual void paint(PaintInfo&, const LayoutPoint&); 84 virtual CursorDirective getCursor(const LayoutPoint&, Cursor&) const; 85 virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction) OVERRIDE; 86 87 virtual void paintContents(PaintInfo&, const LayoutPoint&); 88 89 private: 90 virtual bool isWidget() const OVERRIDE FINAL { return true; } 91 92 virtual void willBeDestroyed() OVERRIDE FINAL; 93 virtual void destroy() OVERRIDE FINAL; 94 95 bool setWidgetGeometry(const LayoutRect&); 96 bool updateWidgetGeometry(); 97 98 RefPtr<Widget> m_widget; 99 FrameView* m_frameView; 100 IntRect m_clipRect; // The rectangle needs to remain correct after scrolling, so it is stored in content view coordinates, and not clipped to window. 101 int m_refCount; 102 }; 103 104 inline RenderWidget* toRenderWidget(RenderObject* object) 105 { 106 ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isWidget()); 107 return static_cast<RenderWidget*>(object); 108 } 109 110 inline const RenderWidget* toRenderWidget(const RenderObject* object) 111 { 112 ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isWidget()); 113 return static_cast<const RenderWidget*>(object); 114 } 115 116 // This will catch anyone doing an unnecessary cast. 117 void toRenderWidget(const RenderWidget*); 118 119 } // namespace WebCore 120 121 #endif // RenderWidget_h 122