author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Mon, 04 Oct 2010 01:32:07 +0300 | |
changeset 2 | 303757a437d3 |
parent 0 | 4f2f89ce4247 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (C) 1999 Lars Knoll (knoll@kde.org) |
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* Copyright (C) 2006 Apple Computer, Inc. |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Library General Public |
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* License as published by the Free Software Foundation; either |
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* version 2 of the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Library General Public License for more details. |
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* |
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* You should have received a copy of the GNU Library General Public License |
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* along with this library; see the file COPYING.LIB. If not, write to |
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
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* Boston, MA 02110-1301, USA. |
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* |
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*/ |
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#ifndef RenderView_h |
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#define RenderView_h |
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#include "FrameView.h" |
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#include "LayoutState.h" |
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#include "RenderBlock.h" |
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#include <wtf/OwnPtr.h> |
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namespace WebCore { |
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class RenderWidget; |
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#if USE(ACCELERATED_COMPOSITING) |
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class RenderLayerCompositor; |
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#endif |
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class RenderView : public RenderBlock { |
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public: |
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RenderView(Node*, FrameView*); |
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virtual ~RenderView(); |
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virtual const char* renderName() const { return "RenderView"; } |
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virtual bool isRenderView() const { return true; } |
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virtual bool requiresLayer() const { return true; } |
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virtual void layout(); |
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virtual void calcWidth(); |
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virtual void calcHeight(); |
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virtual void calcPrefWidths(); |
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// The same as the FrameView's layoutHeight/layoutWidth but with null check guards. |
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int viewHeight() const; |
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int viewWidth() const; |
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float zoomFactor() const; |
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FrameView* frameView() const { return m_frameView; } |
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virtual void computeRectForRepaint(RenderBoxModelObject* repaintContainer, IntRect&, bool fixed = false); |
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virtual void repaintViewRectangle(const IntRect&, bool immediate = false); |
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// Repaint the view, and all composited layers that intersect the given absolute rectangle. |
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// FIXME: ideally we'd never have to do this, if all repaints are container-relative. |
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virtual void repaintRectangleInViewAndCompositedLayers(const IntRect&, bool immediate = false); |
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virtual void paint(PaintInfo&, int tx, int ty); |
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virtual void paintBoxDecorations(PaintInfo&, int tx, int ty); |
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enum SelectionRepaintMode { RepaintNewXOROld, RepaintNewMinusOld }; |
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void setSelection(RenderObject* start, int startPos, RenderObject* end, int endPos, SelectionRepaintMode = RepaintNewXOROld); |
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void clearSelection(); |
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virtual RenderObject* selectionStart() const { return m_selectionStart; } |
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virtual RenderObject* selectionEnd() const { return m_selectionEnd; } |
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bool printing() const; |
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void setPrintImages(bool enable) { m_printImages = enable; } |
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bool printImages() const { return m_printImages; } |
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void setTruncatedAt(int y) { m_truncatedAt = y; m_bestTruncatedAt = m_truncatorWidth = 0; m_minimumColumnHeight = 0; m_forcedPageBreak = false; } |
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void setBestTruncatedAt(int y, RenderBoxModelObject* forRenderer, bool forcedBreak = false); |
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void setMinimumColumnHeight(int height) { m_minimumColumnHeight = height; } |
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int bestTruncatedAt() const { return m_bestTruncatedAt; } |
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int minimumColumnHeight() const { return m_minimumColumnHeight; } |
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int truncatedAt() const { return m_truncatedAt; } |
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virtual void absoluteRects(Vector<IntRect>&, int tx, int ty); |
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virtual void absoluteQuads(Vector<FloatQuad>&); |
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IntRect selectionBounds(bool clipToVisibleContent = true) const; |
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#if USE(ACCELERATED_COMPOSITING) |
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void setMaximalOutlineSize(int o); |
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#else |
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void setMaximalOutlineSize(int o) { m_maximalOutlineSize = o; } |
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#endif |
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int maximalOutlineSize() const { return m_maximalOutlineSize; } |
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virtual IntRect viewRect() const; |
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void selectionStartEnd(int& startPos, int& endPos) const; |
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IntRect printRect() const { return m_printRect; } |
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void setPrintRect(const IntRect& r) { m_printRect = r; } |
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void updateWidgetPositions(); |
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void addWidget(RenderWidget*); |
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void removeWidget(RenderWidget*); |
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// layoutDelta is used transiently during layout to store how far an object has moved from its |
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// last layout location, in order to repaint correctly. |
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// If we're doing a full repaint m_layoutState will be 0, but in that case layoutDelta doesn't matter. |
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IntSize layoutDelta() const |
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{ |
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return m_layoutState ? m_layoutState->m_layoutDelta : IntSize(); |
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} |
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void addLayoutDelta(const IntSize& delta) |
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{ |
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if (m_layoutState) |
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m_layoutState->m_layoutDelta += delta; |
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} |
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bool doingFullRepaint() const { return m_frameView->needsFullRepaint(); } |
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void pushLayoutState(RenderBox* renderer, const IntSize& offset) |
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{ |
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if (doingFullRepaint()) |
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return; |
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// We push LayoutState even if layoutState is disabled because it stores layoutDelta too. |
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m_layoutState = new (renderArena()) LayoutState(m_layoutState, renderer, offset); |
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} |
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void pushLayoutState(RenderObject*); |
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void popLayoutState() |
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{ |
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if (doingFullRepaint()) |
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return; |
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LayoutState* state = m_layoutState; |
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m_layoutState = state->m_next; |
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state->destroy(renderArena()); |
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} |
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bool shouldDisableLayoutStateForSubtree(RenderObject*) const; |
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// Returns true if layoutState should be used for its cached offset and clip. |
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bool layoutStateEnabled() const { return m_layoutStateDisableCount == 0 && m_layoutState; } |
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LayoutState* layoutState() const { return m_layoutState; } |
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// Suspends the LayoutState optimization. Used under transforms that cannot be represented by |
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// LayoutState (common in SVG) and when manipulating the render tree during layout in ways |
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// that can trigger repaint of a non-child (e.g. when a list item moves its list marker around). |
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// Note that even when disabled, LayoutState is still used to store layoutDelta. |
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void disableLayoutState() { m_layoutStateDisableCount++; } |
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void enableLayoutState() { ASSERT(m_layoutStateDisableCount > 0); m_layoutStateDisableCount--; } |
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virtual void updateHitTestResult(HitTestResult&, const IntPoint&); |
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// Notifications that this view became visible in a window, or will be |
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// removed from the window. |
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void didMoveOnscreen(); |
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void willMoveOffscreen(); |
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#if USE(ACCELERATED_COMPOSITING) |
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RenderLayerCompositor* compositor(); |
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bool usesCompositing() const; |
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#endif |
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protected: |
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virtual void mapLocalToContainer(RenderBoxModelObject* repaintContainer, bool useTransforms, bool fixed, TransformState&) const; |
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virtual void mapAbsoluteToLocalPoint(bool fixed, bool useTransforms, TransformState&) const; |
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private: |
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bool shouldRepaint(const IntRect& r) const; |
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int docHeight() const; |
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int docWidth() const; |
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protected: |
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FrameView* m_frameView; |
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RenderObject* m_selectionStart; |
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RenderObject* m_selectionEnd; |
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int m_selectionStartPos; |
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int m_selectionEndPos; |
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// used to ignore viewport width when printing to the printer |
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bool m_printImages; |
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int m_truncatedAt; |
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int m_maximalOutlineSize; // Used to apply a fudge factor to dirty-rect checks on blocks/tables. |
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IntRect m_printRect; // Used when printing. |
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typedef HashSet<RenderWidget*> RenderWidgetSet; |
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RenderWidgetSet m_widgets; |
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private: |
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int m_bestTruncatedAt; |
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int m_truncatorWidth; |
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int m_minimumColumnHeight; |
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bool m_forcedPageBreak; |
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LayoutState* m_layoutState; |
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unsigned m_layoutStateDisableCount; |
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#if USE(ACCELERATED_COMPOSITING) |
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OwnPtr<RenderLayerCompositor> m_compositor; |
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#endif |
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}; |
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inline RenderView* toRenderView(RenderObject* object) |
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{ |
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ASSERT(!object || object->isRenderView()); |
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return static_cast<RenderView*>(object); |
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} |
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inline const RenderView* toRenderView(const RenderObject* object) |
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{ |
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ASSERT(!object || object->isRenderView()); |
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return static_cast<const RenderView*>(object); |
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} |
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// This will catch anyone doing an unnecessary cast. |
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void toRenderView(const RenderView*); |
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|
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// Stack-based class to assist with LayoutState push/pop |
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class LayoutStateMaintainer : public Noncopyable { |
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public: |
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// ctor to push now |
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LayoutStateMaintainer(RenderView* view, RenderBox* root, IntSize offset, bool disableState = false) |
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: m_view(view) |
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, m_disabled(disableState) |
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, m_didStart(false) |
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, m_didEnd(false) |
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{ |
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push(root, offset); |
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} |
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|
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// ctor to maybe push later |
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LayoutStateMaintainer(RenderView* view) |
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: m_view(view) |
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, m_disabled(false) |
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, m_didStart(false) |
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, m_didEnd(false) |
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{ |
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} |
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~LayoutStateMaintainer() |
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{ |
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ASSERT(m_didStart == m_didEnd); // if this fires, it means that someone did a push(), but forgot to pop(). |
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} |
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void push(RenderBox* root, IntSize offset) |
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{ |
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ASSERT(!m_didStart); |
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// We push state even if disabled, because we still need to store layoutDelta |
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m_view->pushLayoutState(root, offset); |
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if (m_disabled) |
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m_view->disableLayoutState(); |
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m_didStart = true; |
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} |
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void pop() |
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{ |
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if (m_didStart) { |
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ASSERT(!m_didEnd); |
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m_view->popLayoutState(); |
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if (m_disabled) |
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m_view->enableLayoutState(); |
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m_didEnd = true; |
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} |
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} |
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bool didPush() const { return m_didStart; } |
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private: |
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RenderView* m_view; |
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bool m_disabled : 1; // true if the offset and clip part of layoutState is disabled |
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bool m_didStart : 1; // true if we did a push or disable |
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bool m_didEnd : 1; // true if we popped or re-enabled |
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}; |
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} // namespace WebCore |
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#endif // RenderView_h |