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+/*
+ * This file is part of the HTML widget for KDE.
+ *
+ * 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 "Frame.h"
+#include "LayoutState.h"
+#include "RenderBlock.h"
+
+namespace WebCore {
+
+class RenderView : public RenderBlock {
+public:
+ RenderView(Node*, FrameView*);
+ virtual ~RenderView();
+
+ virtual const char* renderName() const { return "RenderView"; }
+
+ virtual bool isRenderView() const { return true; }
+
+ virtual void layout();
+ virtual void calcWidth();
+ virtual void calcHeight();
+ virtual void calcPrefWidths();
+ virtual FloatPoint localToAbsolute(FloatPoint localPoint = FloatPoint(), bool fixed = false, bool useTransforms = false) const;
+ virtual FloatPoint absoluteToLocal(FloatPoint containerPoint, bool fixed = false, bool useTransforms = false) const;
+ virtual FloatQuad localToAbsoluteQuad(const FloatQuad&, bool fixed = false) const;
+
+ int docHeight() const;
+ int docWidth() const;
+
+ // The same as the FrameView's layoutHeight/layoutWidth but with null check guards.
+ int viewHeight() const;
+ int viewWidth() const;
+
+ float zoomFactor() const { return m_frameView->frame() && m_frameView->frame()->shouldApplyPageZoom() ? m_frameView->frame()->zoomFactor() : 1.0f; }
+
+ FrameView* frameView() const { return m_frameView; }
+
+ virtual bool hasOverhangingFloats() { return false; }
+
+ virtual void computeAbsoluteRepaintRect(IntRect&, bool fixed = false);
+ virtual void repaintViewRectangle(const IntRect&, bool immediate = false);
+
+ virtual void paint(PaintInfo&, int tx, int ty);
+ virtual void paintBoxDecorations(PaintInfo&, int tx, int ty);
+
+ void setSelection(RenderObject* start, int startPos, RenderObject* end, int endPos);
+ 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_forcedPageBreak = false; }
+ void setBestTruncatedAt(int y, RenderObject *forRenderer, bool forcedBreak = false);
+ int bestTruncatedAt() const { return m_bestTruncatedAt; }
+
+ int truncatedAt() const { return m_truncatedAt; }
+
+ virtual void absoluteRects(Vector<IntRect>&, int tx, int ty, bool topLevel = true);
+ virtual void absoluteQuads(Vector<FloatQuad>&, bool topLevel = true);
+
+ IntRect selectionBounds(bool clipToVisibleContent = true) const;
+
+ void setMaximalOutlineSize(int o) { m_maximalOutlineSize = o; }
+ int maximalOutlineSize() const { return m_maximalOutlineSize; }
+
+ virtual IntRect viewRect() const;
+
+ virtual 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(RenderObject*);
+ void removeWidget(RenderObject*);
+
+ // layoutDelta is used transiently during layout to store how far an object has moved from its
+ // last layout location, in order to repaint correctly
+ const IntSize& layoutDelta() const { return m_layoutDelta; }
+ void addLayoutDelta(const IntSize& delta) { m_layoutDelta += delta; }
+
+ void pushLayoutState(RenderBox* renderer, const IntSize& offset)
+ {
+ if (m_layoutStateDisableCount || m_frameView->needsFullRepaint())
+ return;
+ m_layoutState = new (renderArena()) LayoutState(m_layoutState, renderer, offset);
+ }
+
+ void pushLayoutState(RenderObject*);
+
+ void popLayoutState()
+ {
+ if (m_layoutStateDisableCount || m_frameView->needsFullRepaint())
+ return;
+ LayoutState* state = m_layoutState;
+ m_layoutState = state->m_next;
+ state->destroy(renderArena());
+ }
+
+ LayoutState* layoutState() const { return m_layoutStateDisableCount ? 0 : 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).
+ void disableLayoutState() { m_layoutStateDisableCount++; }
+ void enableLayoutState() { ASSERT(m_layoutStateDisableCount > 0); m_layoutStateDisableCount--; }
+
+private:
+ // selectionRect should never be called on a RenderView
+ virtual IntRect selectionRect(bool);
+
+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<RenderObject*> RenderObjectSet;
+
+ RenderObjectSet m_widgets;
+
+private:
+ int m_bestTruncatedAt;
+ int m_truncatorWidth;
+ bool m_forcedPageBreak;
+ IntSize m_layoutDelta;
+ LayoutState* m_layoutState;
+ unsigned m_layoutStateDisableCount;
+};
+
+// Stack-based class to assist with LayoutState push/pop
+class LayoutStateMaintainer : Noncopyable {
+public:
+ // ctor to push now
+ LayoutStateMaintainer(RenderView* view, RenderBox* root, IntSize offset, bool shouldPush = true)
+ : m_view(view)
+ , m_shouldPushPop(shouldPush)
+ , m_didStart(false)
+ , m_didEnd(false)
+ {
+ push(root, offset);
+ }
+
+ // ctor to maybe push later
+ LayoutStateMaintainer(RenderView* view)
+ : m_view(view)
+ , m_shouldPushPop(true)
+ , 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 pop()
+ {
+ if (m_didStart) {
+ ASSERT(!m_didEnd);
+ if (m_shouldPushPop)
+ m_view->popLayoutState();
+ else
+ m_view->enableLayoutState();
+ m_didEnd = true;
+ }
+ }
+
+ void push(RenderBox* root, IntSize offset)
+ {
+ ASSERT(!m_didStart);
+ if (m_shouldPushPop)
+ m_view->pushLayoutState(root, offset);
+ else
+ m_view->disableLayoutState();
+ m_didStart = true;
+ }
+
+ bool didPush() const { return m_didStart; }
+
+private:
+ RenderView* m_view;
+ bool m_shouldPushPop : 1; // true if we should push/pop, rather than disable/enable
+ 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
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