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Diffstat (limited to 'Source/WebCore/rendering/RenderView.h')
| -rw-r--r-- | Source/WebCore/rendering/RenderView.h | 335 |
1 files changed, 335 insertions, 0 deletions
diff --git a/Source/WebCore/rendering/RenderView.h b/Source/WebCore/rendering/RenderView.h new file mode 100644 index 0000000..14b94ec --- /dev/null +++ b/Source/WebCore/rendering/RenderView.h @@ -0,0 +1,335 @@ +/* + * Copyright (C) 1999 Lars Knoll (knoll@kde.org) + * Copyright (C) 2006 Apple Computer, Inc. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library General Public License + * along with this library; see the file COPYING.LIB. If not, write to + * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, + * Boston, MA 02110-1301, USA. + * + */ + +#ifndef RenderView_h +#define RenderView_h + +#include "FrameView.h" +#include "LayoutState.h" +#include "RenderBlock.h" +#include <wtf/OwnPtr.h> + +namespace WebCore { + +class RenderWidget; + +#if USE(ACCELERATED_COMPOSITING) +class RenderLayerCompositor; +#endif + +class RenderView : public RenderBlock { +public: + RenderView(Node*, FrameView*); + virtual ~RenderView(); + + virtual const char* renderName() const { return "RenderView"; } + + virtual bool isRenderView() const { return true; } + + virtual bool requiresLayer() const { return true; } + + virtual bool isChildAllowed(RenderObject*, RenderStyle*) const; + + virtual void layout(); + virtual void computeLogicalWidth(); + virtual void computeLogicalHeight(); + virtual void computePreferredLogicalWidths(); + + // The same as the FrameView's layoutHeight/layoutWidth but with null check guards. + int viewHeight() const; + int viewWidth() const; + int viewLogicalWidth() const { return style()->isHorizontalWritingMode() ? viewWidth() : viewHeight(); } + int viewLogicalHeight() const { return style()->isHorizontalWritingMode() ? viewHeight() : viewWidth(); } + + float zoomFactor() const; + + FrameView* frameView() const { return m_frameView; } + + virtual void computeRectForRepaint(RenderBoxModelObject* repaintContainer, IntRect&, bool fixed = false); + virtual void repaintViewRectangle(const IntRect&, bool immediate = false); + // Repaint the view, and all composited layers that intersect the given absolute rectangle. + // FIXME: ideally we'd never have to do this, if all repaints are container-relative. + virtual void repaintRectangleInViewAndCompositedLayers(const IntRect&, bool immediate = false); + + virtual void paint(PaintInfo&, int tx, int ty); + virtual void paintBoxDecorations(PaintInfo&, int tx, int ty); + + enum SelectionRepaintMode { RepaintNewXOROld, RepaintNewMinusOld }; + void setSelection(RenderObject* start, int startPos, RenderObject* end, int endPos, SelectionRepaintMode = RepaintNewXOROld); + void clearSelection(); + RenderObject* selectionStart() const { return m_selectionStart; } + RenderObject* selectionEnd() const { return m_selectionEnd; } + IntRect selectionBounds(bool clipToVisibleContent = true) const; + void selectionStartEnd(int& startPos, int& endPos) const; + + bool printing() const; + + virtual void absoluteRects(Vector<IntRect>&, int tx, int ty); + virtual void absoluteQuads(Vector<FloatQuad>&); + +#if USE(ACCELERATED_COMPOSITING) + void setMaximalOutlineSize(int o); +#else + void setMaximalOutlineSize(int o) { m_maximalOutlineSize = o; } +#endif + int maximalOutlineSize() const { return m_maximalOutlineSize; } + + virtual IntRect viewRect() const; + + void updateWidgetPositions(); + void addWidget(RenderWidget*); + void removeWidget(RenderWidget*); + + void notifyWidgets(WidgetNotification); +#ifdef ANDROID_PLUGINS + const HashSet<RenderWidget*>& widgets() const { return m_widgets; } +#endif + + // layoutDelta is used transiently during layout to store how far an object has moved from its + // last layout location, in order to repaint correctly. + // If we're doing a full repaint m_layoutState will be 0, but in that case layoutDelta doesn't matter. + IntSize layoutDelta() const + { + return m_layoutState ? m_layoutState->m_layoutDelta : IntSize(); + } + void addLayoutDelta(const IntSize& delta) + { + if (m_layoutState) + m_layoutState->m_layoutDelta += delta; + } + + bool doingFullRepaint() const { return m_frameView->needsFullRepaint(); } + + // Subtree push/pop + void pushLayoutState(RenderObject*); + void popLayoutState(RenderObject*) { return popLayoutState(); } // Just doing this to keep popLayoutState() private and to make the subtree calls symmetrical. + + bool shouldDisableLayoutStateForSubtree(RenderObject*) const; + + // Returns true if layoutState should be used for its cached offset and clip. + bool layoutStateEnabled() const { return m_layoutStateDisableCount == 0 && m_layoutState; } + LayoutState* layoutState() const { return m_layoutState; } + + // Suspends the LayoutState optimization. Used under transforms that cannot be represented by + // LayoutState (common in SVG) and when manipulating the render tree during layout in ways + // that can trigger repaint of a non-child (e.g. when a list item moves its list marker around). + // Note that even when disabled, LayoutState is still used to store layoutDelta. + void disableLayoutState() { m_layoutStateDisableCount++; } + void enableLayoutState() { ASSERT(m_layoutStateDisableCount > 0); m_layoutStateDisableCount--; } + + virtual void updateHitTestResult(HitTestResult&, const IntPoint&); + + unsigned pageLogicalHeight() const { return m_pageLogicalHeight; } + void setPageLogicalHeight(unsigned height) + { + if (m_pageLogicalHeight != height) { + m_pageLogicalHeight = height; + m_pageLogicalHeightChanged = true; + } + } + + // FIXME: These functions are deprecated. No code should be added that uses these. + int bestTruncatedAt() const { return m_legacyPrinting.m_bestTruncatedAt; } + void setBestTruncatedAt(int y, RenderBoxModelObject* forRenderer, bool forcedBreak = false); + int truncatedAt() const { return m_legacyPrinting.m_truncatedAt; } + void setTruncatedAt(int y) + { + m_legacyPrinting.m_truncatedAt = y; + m_legacyPrinting.m_bestTruncatedAt = 0; + m_legacyPrinting.m_truncatorWidth = 0; + m_legacyPrinting.m_forcedPageBreak = false; + } + const IntRect& printRect() const { return m_legacyPrinting.m_printRect; } + void setPrintRect(const IntRect& r) { m_legacyPrinting.m_printRect = r; } + // End deprecated functions. + + // Notifications that this view became visible in a window, or will be + // removed from the window. + void didMoveOnscreen(); + void willMoveOffscreen(); + +#if USE(ACCELERATED_COMPOSITING) + RenderLayerCompositor* compositor(); + bool usesCompositing() const; +#endif + + int docTop() const; + int docBottom() const; + int docHeight() const { return docBottom() - docTop(); } + int docLeft() const; + int docRight() const; + int docWidth() const { return docRight() - docLeft(); } + IntRect documentRect() const { return IntRect(docLeft(), docTop(), docWidth(), docHeight()); } + +protected: + virtual void mapLocalToContainer(RenderBoxModelObject* repaintContainer, bool useTransforms, bool fixed, TransformState&) const; + virtual void mapAbsoluteToLocalPoint(bool fixed, bool useTransforms, TransformState&) const; + +private: + bool shouldRepaint(const IntRect& r) const; + + // These functions may only be accessed by LayoutStateMaintainer. + bool pushLayoutState(RenderBox* renderer, const IntSize& offset, int pageHeight = 0, bool pageHeightChanged = false, ColumnInfo* colInfo = 0) + { + // We push LayoutState even if layoutState is disabled because it stores layoutDelta too. + if (!doingFullRepaint() || renderer->hasColumns() || m_layoutState->isPaginated()) { + m_layoutState = new (renderArena()) LayoutState(m_layoutState, renderer, offset, pageHeight, pageHeightChanged, colInfo); + return true; + } + return false; + } + + void popLayoutState() + { + LayoutState* state = m_layoutState; + m_layoutState = state->m_next; + state->destroy(renderArena()); + } + + size_t getRetainedWidgets(Vector<RenderWidget*>&); + void releaseWidgets(Vector<RenderWidget*>&); + + friend class LayoutStateMaintainer; + +protected: + FrameView* m_frameView; + + RenderObject* m_selectionStart; + RenderObject* m_selectionEnd; + int m_selectionStartPos; + int m_selectionEndPos; + + // FIXME: Only used by embedded WebViews inside AppKit NSViews. Find a way to remove. + struct LegacyPrinting { + LegacyPrinting() + : m_bestTruncatedAt(0) + , m_truncatedAt(0) + , m_truncatorWidth(0) + , m_forcedPageBreak(false) + { } + + int m_bestTruncatedAt; + int m_truncatedAt; + int m_truncatorWidth; + IntRect m_printRect; + bool m_forcedPageBreak; + }; + LegacyPrinting m_legacyPrinting; + // End deprecated members. + + int m_maximalOutlineSize; // Used to apply a fudge factor to dirty-rect checks on blocks/tables. + + typedef HashSet<RenderWidget*> RenderWidgetSet; + RenderWidgetSet m_widgets; + +private: + unsigned m_pageLogicalHeight; + bool m_pageLogicalHeightChanged; + LayoutState* m_layoutState; + unsigned m_layoutStateDisableCount; +#if USE(ACCELERATED_COMPOSITING) + OwnPtr<RenderLayerCompositor> m_compositor; +#endif +}; + +inline RenderView* toRenderView(RenderObject* object) +{ + ASSERT(!object || object->isRenderView()); + return static_cast<RenderView*>(object); +} + +inline const RenderView* toRenderView(const RenderObject* object) +{ + ASSERT(!object || object->isRenderView()); + return static_cast<const RenderView*>(object); +} + +// This will catch anyone doing an unnecessary cast. +void toRenderView(const RenderView*); + + +// Stack-based class to assist with LayoutState push/pop +class LayoutStateMaintainer { + WTF_MAKE_NONCOPYABLE(LayoutStateMaintainer); +public: + // ctor to push now + LayoutStateMaintainer(RenderView* view, RenderBox* root, IntSize offset, bool disableState = false, int pageHeight = 0, bool pageHeightChanged = false, ColumnInfo* colInfo = 0) + : m_view(view) + , m_disabled(disableState) + , m_didStart(false) + , m_didEnd(false) + , m_didCreateLayoutState(false) + { + push(root, offset, pageHeight, pageHeightChanged, colInfo); + } + + // ctor to maybe push later + LayoutStateMaintainer(RenderView* view) + : m_view(view) + , m_disabled(false) + , m_didStart(false) + , m_didEnd(false) + , m_didCreateLayoutState(false) + { + } + + ~LayoutStateMaintainer() + { + ASSERT(m_didStart == m_didEnd); // if this fires, it means that someone did a push(), but forgot to pop(). + } + + void push(RenderBox* root, IntSize offset, int pageHeight = 0, bool pageHeightChanged = false, ColumnInfo* colInfo = 0) + { + ASSERT(!m_didStart); + // We push state even if disabled, because we still need to store layoutDelta + m_didCreateLayoutState = m_view->pushLayoutState(root, offset, pageHeight, pageHeightChanged, colInfo); + if (m_disabled && m_didCreateLayoutState) + m_view->disableLayoutState(); + m_didStart = true; + } + + void pop() + { + if (m_didStart) { + ASSERT(!m_didEnd); + if (m_didCreateLayoutState) { + m_view->popLayoutState(); + if (m_disabled) + m_view->enableLayoutState(); + } + + m_didEnd = true; + } + } + + bool didPush() const { return m_didStart; } + +private: + RenderView* m_view; + bool m_disabled : 1; // true if the offset and clip part of layoutState is disabled + bool m_didStart : 1; // true if we did a push or disable + bool m_didEnd : 1; // true if we popped or re-enabled + bool m_didCreateLayoutState : 1; // true if we actually made a layout state. +}; + +} // namespace WebCore + +#endif // RenderView_h |