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* This file is part of the render object implementation for KHTML.
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* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
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* (C) 1999 Antti Koivisto (koivisto@kde.org)
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* Copyright (C) 2003, 2004, 2005, 2006 Apple Computer, Inc.
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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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* 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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* 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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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#include "DeprecatedPtrList.h"
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#include "RenderFlow.h"
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#include "RootInlineBox.h"
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template <class Iterator, class Run> class BidiResolver;
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typedef BidiResolver<BidiIterator, BidiRun> BidiState;
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enum CaretType { CursorCaret, DragCaret };
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class RenderBlock : public RenderFlow {
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virtual ~RenderBlock();
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virtual const char* renderName() const;
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// These two functions are overridden for inline-block.
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virtual short lineHeight(bool firstLine, bool isRootLineBox = false) const;
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virtual short baselinePosition(bool firstLine, bool isRootLineBox = false) const;
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virtual bool isRenderBlock() const { return true; }
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virtual bool isBlockFlow() const { return (!isInline() || isReplaced()) && !isTable(); }
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virtual bool isInlineFlow() const { return isInline() && !isReplaced(); }
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virtual bool isInlineBlockOrInlineTable() const { return isInline() && isReplaced(); }
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virtual bool childrenInline() const { return m_childrenInline; }
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virtual void setChildrenInline(bool b) { m_childrenInline = b; }
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void makeChildrenNonInline(RenderObject* insertionPoint = 0);
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void deleteLineBoxTree();
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// The height (and width) of a block when you include overflow spillage out of the bottom
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// of the block (e.g., a <div style="height:25px"> that has a 100px tall image inside
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// it would have an overflow height of borderTop() + paddingTop() + 100px.
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virtual int overflowHeight(bool includeInterior = true) const;
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virtual int overflowWidth(bool includeInterior = true) const;
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virtual int overflowLeft(bool includeInterior = true) const;
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virtual int overflowTop(bool includeInterior = true) const;
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virtual IntRect overflowRect(bool includeInterior = true) const;
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virtual void setOverflowHeight(int h) { m_overflowHeight = h; }
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virtual void setOverflowWidth(int w) { m_overflowWidth = w; }
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void addVisualOverflow(const IntRect&);
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virtual bool isSelfCollapsingBlock() const;
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virtual bool isTopMarginQuirk() const { return m_topMarginQuirk; }
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virtual bool isBottomMarginQuirk() const { return m_bottomMarginQuirk; }
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virtual int maxTopMargin(bool positive) const { return positive ? maxTopPosMargin() : maxTopNegMargin(); }
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virtual int maxBottomMargin(bool positive) const { return positive ? maxBottomPosMargin() : maxBottomNegMargin(); }
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int maxTopPosMargin() const { return m_maxMargin ? m_maxMargin->m_topPos : MaxMargin::topPosDefault(this); }
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int maxTopNegMargin() const { return m_maxMargin ? m_maxMargin->m_topNeg : MaxMargin::topNegDefault(this); }
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int maxBottomPosMargin() const { return m_maxMargin ? m_maxMargin->m_bottomPos : MaxMargin::bottomPosDefault(this); }
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int maxBottomNegMargin() const { return m_maxMargin ? m_maxMargin->m_bottomNeg : MaxMargin::bottomNegDefault(this); }
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void setMaxTopMargins(int pos, int neg);
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void setMaxBottomMargins(int pos, int neg);
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void initMaxMarginValues()
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m_maxMargin->m_topPos = MaxMargin::topPosDefault(this);
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m_maxMargin->m_topNeg = MaxMargin::topNegDefault(this);
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m_maxMargin->m_bottomPos = MaxMargin::bottomPosDefault(this);
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m_maxMargin->m_bottomNeg = MaxMargin::bottomNegDefault(this);
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virtual void addChildToFlow(RenderObject* newChild, RenderObject* beforeChild);
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virtual void removeChild(RenderObject*);
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virtual void repaintOverhangingFloats(bool paintAllDescendants);
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virtual void setStyle(RenderStyle*);
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virtual void layout();
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virtual void layoutBlock(bool relayoutChildren);
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void layoutBlockChildren(bool relayoutChildren);
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void layoutInlineChildren(bool relayoutChildren, int& repaintTop, int& repaintBottom);
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void layoutPositionedObjects(bool relayoutChildren);
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void insertPositionedObject(RenderObject*);
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void removePositionedObject(RenderObject*);
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virtual void removePositionedObjects(RenderBlock*);
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virtual void positionListMarker() { }
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virtual void borderFitAdjust(int& x, int& w) const; // Shrink the box in which the border paints if border-fit is set.
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// Called to lay out the legend for a fieldset.
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virtual RenderObject* layoutLegend(bool relayoutChildren) { return 0; };
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// the implementation of the following functions is in bidi.cpp
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void bidiReorderLine(const BidiIterator& start, const BidiIterator& end, BidiState&);
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RootInlineBox* determineStartPosition(bool fullLayout, BidiIterator& start, BidiState&);
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RootInlineBox* determineEndPosition(RootInlineBox* startBox, BidiIterator& cleanLineStart,
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BidiStatus& cleanLineBidiStatus,
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bool matchedEndLine(const BidiIterator& start, const BidiStatus& status,
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const BidiIterator& endLineStart, const BidiStatus& endLineStatus,
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RootInlineBox*& endLine, int& endYPos, int& repaintBottom, int& repaintTop);
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bool generatesLineBoxesForInlineChild(RenderObject*);
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int skipWhitespace(BidiIterator&, BidiState&);
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BidiIterator findNextLineBreak(BidiIterator& start, BidiState& info);
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RootInlineBox* constructLine(const BidiIterator& start, const BidiIterator& end);
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InlineFlowBox* createLineBoxes(RenderObject*);
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void computeHorizontalPositionsForLine(RootInlineBox*, bool reachedEnd);
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void computeVerticalPositionsForLine(RootInlineBox*);
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void checkLinesForOverflow();
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void deleteEllipsisLineBoxes();
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void checkLinesForTextOverflow();
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// end bidi.cpp functions
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virtual void paint(PaintInfo&, int tx, int ty);
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virtual void paintObject(PaintInfo&, int tx, int ty);
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void paintFloats(PaintInfo&, int tx, int ty, bool paintSelection = false);
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void paintContents(PaintInfo&, int tx, int ty);
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void paintColumns(PaintInfo&, int tx, int ty, bool paintFloats = false);
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void paintChildren(PaintInfo&, int tx, int ty);
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void paintEllipsisBoxes(PaintInfo&, int tx, int ty);
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void paintSelection(PaintInfo&, int tx, int ty);
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void paintCaret(PaintInfo&, CaretType);
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void insertFloatingObject(RenderObject*);
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void removeFloatingObject(RenderObject*);
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// called from lineWidth, to position the floats added in the last line.
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void positionNewFloats();
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int getClearDelta(RenderObject* child);
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virtual void markAllDescendantsWithFloatsForLayout(RenderObject* floatToRemove = 0);
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void markPositionedObjectsForLayout();
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// FIXME: containsFloats() should not return true if the floating objects list
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// is empty. However, layoutInlineChildren() relies on the current behavior.
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// http://bugs.webkit.org/show_bug.cgi?id=7395#c3
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virtual bool containsFloats() { return m_floatingObjects; }
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virtual bool containsFloat(RenderObject*);
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virtual bool avoidsFloats() const;
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virtual bool hasOverhangingFloats() { return !hasColumns() && floatBottom() > m_height; }
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void addIntrudingFloats(RenderBlock* prev, int xoffset, int yoffset);
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void addOverhangingFloats(RenderBlock* child, int xoffset, int yoffset);
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int nearestFloatBottom(int height) const;
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int floatBottom() const;
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inline int leftBottom();
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inline int rightBottom();
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IntRect floatRect() const;
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virtual int lineWidth(int y) const;
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virtual int lowestPosition(bool includeOverflowInterior = true, bool includeSelf = true) const;
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virtual int rightmostPosition(bool includeOverflowInterior = true, bool includeSelf = true) const;
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virtual int leftmostPosition(bool includeOverflowInterior = true, bool includeSelf = true) const;
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int rightOffset() const;
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int rightRelOffset(int y, int fixedOffset, bool applyTextIndent = true, int* heightRemaining = 0) const;
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int rightOffset(int y) const { return rightRelOffset(y, rightOffset(), true); }
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int leftOffset() const;
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int leftRelOffset(int y, int fixedOffset, bool applyTextIndent = true, int* heightRemaining = 0) const;
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int leftOffset(int y) const { return leftRelOffset(y, leftOffset(), true); }
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virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, int x, int y, int tx, int ty, HitTestAction);
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virtual bool hitTestColumns(const HitTestRequest&, HitTestResult&, int x, int y, int tx, int ty, HitTestAction);
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virtual bool hitTestContents(const HitTestRequest&, HitTestResult&, int x, int y, int tx, int ty, HitTestAction);
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virtual bool isPointInOverflowControl(HitTestResult&, int x, int y, int tx, int ty);
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virtual VisiblePosition positionForCoordinates(int x, int y);
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// Block flows subclass availableWidth to handle multi column layout (shrinking the width available to children when laying out.)
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virtual int availableWidth() const;
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virtual void calcPrefWidths();
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void calcInlinePrefWidths();
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void calcBlockPrefWidths();
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virtual int getBaselineOfFirstLineBox() const;
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virtual int getBaselineOfLastLineBox() const;
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RootInlineBox* firstRootBox() const { return static_cast<RootInlineBox*>(firstLineBox()); }
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RootInlineBox* lastRootBox() const { return static_cast<RootInlineBox*>(lastLineBox()); }
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// Obtains the nearest enclosing block (including this block) that contributes a first-line style to our inline
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virtual RenderBlock* firstLineBlock() const;
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virtual void updateFirstLetter();
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bool inRootBlockContext() const;
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void setHasMarkupTruncation(bool b = true) { m_hasMarkupTruncation = b; }
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bool hasMarkupTruncation() const { return m_hasMarkupTruncation; }
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virtual bool hasSelectedChildren() const { return m_selectionState != SelectionNone; }
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virtual SelectionState selectionState() const { return static_cast<SelectionState>(m_selectionState); }
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virtual void setSelectionState(SelectionState s);
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struct BlockSelectionInfo {
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RenderBlock* m_block;
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SelectionState m_state;
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, m_state(SelectionNone)
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BlockSelectionInfo(RenderBlock* b)
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, m_rects(b->needsLayout() ? GapRects() : b->selectionGapRects())
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, m_state(b->selectionState())
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RenderBlock* block() const { return m_block; }
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GapRects rects() const { return m_rects; }
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SelectionState state() const { return m_state; }
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virtual IntRect selectionRect(bool) { return selectionGapRects(); }
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GapRects selectionGapRects();
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virtual bool shouldPaintSelectionGaps() const;
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bool isSelectionRoot() const;
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GapRects fillSelectionGaps(RenderBlock* rootBlock, int blockX, int blockY, int tx, int ty,
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int& lastTop, int& lastLeft, int& lastRight, const PaintInfo* = 0);
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GapRects fillInlineSelectionGaps(RenderBlock* rootBlock, int blockX, int blockY, int tx, int ty,
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int& lastTop, int& lastLeft, int& lastRight, const PaintInfo*);
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GapRects fillBlockSelectionGaps(RenderBlock* rootBlock, int blockX, int blockY, int tx, int ty,
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int& lastTop, int& lastLeft, int& lastRight, const PaintInfo*);
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IntRect fillVerticalSelectionGap(int lastTop, int lastLeft, int lastRight, int bottomY, RenderBlock* rootBlock,
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int blockX, int blockY, const PaintInfo*);
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IntRect fillLeftSelectionGap(RenderObject* selObj, int xPos, int yPos, int height, RenderBlock* rootBlock,
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int blockX, int blockY, int tx, int ty, const PaintInfo*);
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IntRect fillRightSelectionGap(RenderObject* selObj, int xPos, int yPos, int height, RenderBlock* rootBlock,
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int blockX, int blockY, int tx, int ty, const PaintInfo*);
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IntRect fillHorizontalSelectionGap(RenderObject* selObj, int xPos, int yPos, int width, int height, const PaintInfo*);
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void getHorizontalSelectionGapInfo(SelectionState, bool& leftGap, bool& rightGap);
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int leftSelectionOffset(RenderBlock* rootBlock, int y);
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int rightSelectionOffset(RenderBlock* rootBlock, int y);
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virtual void dump(TextStream*, DeprecatedString ind = "") const;
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// Helper methods for computing line counts and heights for line counts.
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RootInlineBox* lineAtIndex(int);
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int heightForLineCount(int);
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void clearTruncation();
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int desiredColumnWidth() const;
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unsigned desiredColumnCount() const;
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Vector<IntRect>* columnRects() const;
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void setDesiredColumnCountAndWidth(int count, int width);
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void adjustRectForColumns(IntRect&) const;
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void addContinuationWithOutline(RenderFlow*);
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void paintContinuationOutlines(PaintInfo&, int tx, int ty);
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void adjustPointToColumnContents(IntPoint&) const;
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void adjustForBorderFit(int x, int& left, int& right) const; // Helper function for borderFitAdjust
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virtual bool hasLineIfEmpty() const;
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bool layoutOnlyPositionedObjects();
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Position positionForBox(InlineBox*, bool start = true) const;
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Position positionForRenderer(RenderObject*, bool start = true) const;
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int columnGap() const;
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void calcColumnWidth();
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int layoutColumns(int endOfContent = -1);
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struct FloatingObject {
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FloatingObject(Type type)
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Type type() { return static_cast<Type>(m_type); }
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unsigned m_type : 1; // Type (left or right aligned)
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// The following helper functions and structs are used by layoutBlockChildren.
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// A compact child that needs to be collapsed into the margin of the following block.
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RenderObject* m_compact;
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// The block with the open margin that the compact child is going to place itself within.
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RenderObject* m_block;
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RenderObject* compact() const { return m_compact; }
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RenderObject* block() const { return m_block; }
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bool matches(RenderObject* child) const { return m_compact && m_block == child; }
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void clear() { set(0, 0); }
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void set(RenderObject* c, RenderObject* b) { m_compact = c; m_block = b; }
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CompactInfo() { clear(); }
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// Collapsing flags for whether we can collapse our margins with our children's margins.
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bool m_canCollapseWithChildren : 1;
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bool m_canCollapseTopWithChildren : 1;
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bool m_canCollapseBottomWithChildren : 1;
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// Whether or not we are a quirky container, i.e., do we collapse away top and bottom
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// margins in our container. Table cells and the body are the common examples. We
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// also have a custom style property for Safari RSS to deal with TypePad blog articles.
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bool m_quirkContainer : 1;
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// This flag tracks whether we are still looking at child margins that can all collapse together at the beginning of a block.
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// They may or may not collapse with the top margin of the block (|m_canCollapseTopWithChildren| tells us that), but they will
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// always be collapsing with one another. This variable can remain set to true through multiple iterations
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// as long as we keep encountering self-collapsing blocks.
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bool m_atTopOfBlock : 1;
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// This flag is set when we know we're examining bottom margins and we know we're at the bottom of the block.
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bool m_atBottomOfBlock : 1;
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// If our last normal flow child was a self-collapsing block that cleared a float,
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// we track it in this variable.
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bool m_selfCollapsingBlockClearedFloat : 1;
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// These variables are used to detect quirky margins that we need to collapse away (in table cells
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// and in the body element).
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bool m_bottomQuirk : 1;
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bool m_determinedTopQuirk : 1;
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// These flags track the previous maximal positive and negative margins.
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MarginInfo(RenderBlock* b, int top, int bottom);
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void setAtTopOfBlock(bool b) { m_atTopOfBlock = b; }
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void setAtBottomOfBlock(bool b) { m_atBottomOfBlock = b; }
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void clearMargin() { m_posMargin = m_negMargin = 0; }
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void setSelfCollapsingBlockClearedFloat(bool b) { m_selfCollapsingBlockClearedFloat = b; }
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void setTopQuirk(bool b) { m_topQuirk = b; }
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void setBottomQuirk(bool b) { m_bottomQuirk = b; }
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void setDeterminedTopQuirk(bool b) { m_determinedTopQuirk = b; }
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void setPosMargin(int p) { m_posMargin = p; }
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void setNegMargin(int n) { m_negMargin = n; }
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void setPosMarginIfLarger(int p) { if (p > m_posMargin) m_posMargin = p; }
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void setNegMarginIfLarger(int n) { if (n > m_negMargin) m_negMargin = n; }
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void setMargin(int p, int n) { m_posMargin = p; m_negMargin = n; }
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bool atTopOfBlock() const { return m_atTopOfBlock; }
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bool canCollapseWithTop() const { return m_atTopOfBlock && m_canCollapseTopWithChildren; }
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bool canCollapseWithBottom() const { return m_atBottomOfBlock && m_canCollapseBottomWithChildren; }
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bool canCollapseTopWithChildren() const { return m_canCollapseTopWithChildren; }
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bool canCollapseBottomWithChildren() const { return m_canCollapseBottomWithChildren; }
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bool selfCollapsingBlockClearedFloat() const { return m_selfCollapsingBlockClearedFloat; }
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bool quirkContainer() const { return m_quirkContainer; }
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bool determinedTopQuirk() const { return m_determinedTopQuirk; }
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bool topQuirk() const { return m_topQuirk; }
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bool bottomQuirk() const { return m_bottomQuirk; }
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int posMargin() const { return m_posMargin; }
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int negMargin() const { return m_negMargin; }
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int margin() const { return m_posMargin - m_negMargin; }
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void adjustPositionedBlock(RenderObject* child, const MarginInfo&);
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void adjustFloatingBlock(const MarginInfo&);
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RenderObject* handleSpecialChild(RenderObject* child, const MarginInfo&, CompactInfo&, bool& handled);
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RenderObject* handleFloatingChild(RenderObject* child, const MarginInfo&, bool& handled);
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RenderObject* handlePositionedChild(RenderObject* child, const MarginInfo&, bool& handled);
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RenderObject* handleCompactChild(RenderObject* child, CompactInfo&, bool& handled);
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RenderObject* handleRunInChild(RenderObject* child, bool& handled);
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void collapseMargins(RenderObject* child, MarginInfo&, int yPosEstimate);
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void clearFloatsIfNeeded(RenderObject* child, MarginInfo&, int oldTopPosMargin, int oldTopNegMargin);
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void insertCompactIfNeeded(RenderObject* child, CompactInfo&);
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int estimateVerticalPosition(RenderObject* child, const MarginInfo&);
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void determineHorizontalPosition(RenderObject* child);
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void handleBottomOfBlock(int top, int bottom, MarginInfo&);
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void setCollapsedBottomMargin(const MarginInfo&);
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// End helper functions and structs used by layoutBlockChildren.
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DeprecatedPtrList<FloatingObject>* m_floatingObjects;
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DeprecatedPtrList<RenderObject>* m_positionedObjects;
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// Allocated only when some of these fields have non-default values
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MaxMargin(const RenderBlock* o)
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: m_topPos(topPosDefault(o))
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, m_topNeg(topNegDefault(o))
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, m_bottomPos(bottomPosDefault(o))
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, m_bottomNeg(bottomNegDefault(o))
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static int topPosDefault(const RenderBlock* o) { return o->marginTop() > 0 ? o->marginTop() : 0; }
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static int topNegDefault(const RenderBlock* o) { return o->marginTop() < 0 ? -o->marginTop() : 0; }
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static int bottomPosDefault(const RenderBlock* o) { return o->marginBottom() > 0 ? o->marginBottom() : 0; }
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static int bottomNegDefault(const RenderBlock* o) { return o->marginBottom() < 0 ? -o->marginBottom() : 0; }
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MaxMargin* m_maxMargin;
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// How much content overflows out of our block vertically or horizontally.
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int m_overflowHeight;
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} // namespace WebCore
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#endif // RenderBlock_h
added
removed
WebCore/rendering/RenderBlock.h
