--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/rendering/RenderView.h Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,286 @@
+/*
+ * 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 void layout();
+ virtual void calcWidth();
+ virtual void calcHeight();
+ virtual void calcPrefWidths();
+
+ // The same as the FrameView's layoutHeight/layoutWidth but with null check guards.
+ int viewHeight() const;
+ int viewWidth() const;
+
+ 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();
+ virtual RenderObject* selectionStart() const { return m_selectionStart; }
+ virtual RenderObject* selectionEnd() const { return m_selectionEnd; }
+
+ bool printing() const;
+ void setPrintImages(bool enable) { m_printImages = enable; }
+ bool printImages() const { return m_printImages; }
+ void setTruncatedAt(int y) { m_truncatedAt = y; m_bestTruncatedAt = m_truncatorWidth = 0; m_minimumColumnHeight = 0; m_forcedPageBreak = false; }
+ void setBestTruncatedAt(int y, RenderBoxModelObject* forRenderer, bool forcedBreak = false);
+ void setMinimumColumnHeight(int height) { m_minimumColumnHeight = height; }
+ int bestTruncatedAt() const { return m_bestTruncatedAt; }
+ int minimumColumnHeight() const { return m_minimumColumnHeight; }
+
+ int truncatedAt() const { return m_truncatedAt; }
+
+ virtual void absoluteRects(Vector<IntRect>&, int tx, int ty);
+ virtual void absoluteQuads(Vector<FloatQuad>&);
+
+ IntRect selectionBounds(bool clipToVisibleContent = true) const;
+
+#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 selectionStartEnd(int& startPos, int& endPos) const;
+
+ IntRect printRect() const { return m_printRect; }
+ void setPrintRect(const IntRect& r) { m_printRect = r; }
+
+ void updateWidgetPositions();
+ void addWidget(RenderWidget*);
+ void removeWidget(RenderWidget*);
+
+ // 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(); }
+
+ void pushLayoutState(RenderBox* renderer, const IntSize& offset)
+ {
+ if (doingFullRepaint())
+ return;
+ // We push LayoutState even if layoutState is disabled because it stores layoutDelta too.
+ m_layoutState = new (renderArena()) LayoutState(m_layoutState, renderer, offset);
+ }
+
+ void pushLayoutState(RenderObject*);
+
+ void popLayoutState()
+ {
+ if (doingFullRepaint())
+ return;
+ LayoutState* state = m_layoutState;
+ m_layoutState = state->m_next;
+ state->destroy(renderArena());
+ }
+
+ 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&);
+
+ // 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
+
+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;
+
+ int docHeight() const;
+ int docWidth() const;
+
+protected:
+ FrameView* m_frameView;
+
+ RenderObject* m_selectionStart;
+ RenderObject* m_selectionEnd;
+ int m_selectionStartPos;
+ int m_selectionEndPos;
+
+ // used to ignore viewport width when printing to the printer
+ bool m_printImages;
+ int m_truncatedAt;
+
+ int m_maximalOutlineSize; // Used to apply a fudge factor to dirty-rect checks on blocks/tables.
+ IntRect m_printRect; // Used when printing.
+
+ typedef HashSet<RenderWidget*> RenderWidgetSet;
+
+ RenderWidgetSet m_widgets;
+
+private:
+ int m_bestTruncatedAt;
+ int m_truncatorWidth;
+ int m_minimumColumnHeight;
+ bool m_forcedPageBreak;
+ 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 : public Noncopyable {
+public:
+ // ctor to push now
+ LayoutStateMaintainer(RenderView* view, RenderBox* root, IntSize offset, bool disableState = false)
+ : m_view(view)
+ , m_disabled(disableState)
+ , m_didStart(false)
+ , m_didEnd(false)
+ {
+ push(root, offset);
+ }
+
+ // ctor to maybe push later
+ LayoutStateMaintainer(RenderView* view)
+ : m_view(view)
+ , m_disabled(false)
+ , m_didStart(false)
+ , m_didEnd(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)
+ {
+ ASSERT(!m_didStart);
+ // We push state even if disabled, because we still need to store layoutDelta
+ m_view->pushLayoutState(root, offset);
+ if (m_disabled)
+ m_view->disableLayoutState();
+ m_didStart = true;
+ }
+
+ void pop()
+ {
+ if (m_didStart) {
+ ASSERT(!m_didEnd);
+ 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
+};
+
+} // namespace WebCore
+
+#endif // RenderView_h