| /* |
| * This file is part of the render object implementation for KHTML. |
| * |
| * Copyright (C) 1999 Lars Knoll (knoll@kde.org) |
| * (C) 1999 Antti Koivisto (koivisto@kde.org) |
| * (C) 2007 David Smith (catfish.man@gmail.com) |
| * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved. |
| * |
| * 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 RenderBlock_h |
| #define RenderBlock_h |
| |
| #include "DeprecatedPtrList.h" |
| #include "GapRects.h" |
| #include "RenderBox.h" |
| #include "RenderLineBoxList.h" |
| #include "RootInlineBox.h" |
| #include <wtf/ListHashSet.h> |
| |
| namespace WebCore { |
| |
| class InlineIterator; |
| class Position; |
| class RenderInline; |
| class RootInlineBox; |
| |
| struct BidiRun; |
| |
| template <class Iterator, class Run> class BidiResolver; |
| template <class Iterator> class MidpointState; |
| typedef BidiResolver<InlineIterator, BidiRun> InlineBidiResolver; |
| typedef MidpointState<InlineIterator> LineMidpointState; |
| |
| enum CaretType { CursorCaret, DragCaret }; |
| |
| class RenderBlock : public RenderBox { |
| public: |
| RenderBlock(Node*); |
| virtual ~RenderBlock(); |
| |
| virtual RenderObjectChildList* virtualChildren() { return children(); } |
| virtual const RenderObjectChildList* virtualChildren() const { return children(); } |
| const RenderObjectChildList* children() const { return &m_children; } |
| RenderObjectChildList* children() { return &m_children; } |
| |
| virtual void destroy(); |
| |
| virtual const char* renderName() const; |
| |
| // These two functions are overridden for inline-block. |
| virtual int lineHeight(bool firstLine, bool isRootLineBox = false) const; |
| virtual int baselinePosition(bool firstLine, bool isRootLineBox = false) const; |
| |
| virtual bool isRenderBlock() const { return true; } |
| virtual bool isBlockFlow() const { return (!isInline() || isReplaced()) && !isTable(); } |
| virtual bool isInlineBlockOrInlineTable() const { return isInline() && isReplaced(); } |
| |
| void makeChildrenNonInline(RenderObject* insertionPoint = 0); |
| virtual void removeLeftoverAnonymousBlock(RenderBlock* child); |
| |
| RenderLineBoxList* lineBoxes() { return &m_lineBoxes; } |
| const RenderLineBoxList* lineBoxes() const { return &m_lineBoxes; } |
| |
| InlineFlowBox* firstLineBox() const { return m_lineBoxes.firstLineBox(); } |
| InlineFlowBox* lastLineBox() const { return m_lineBoxes.lastLineBox(); } |
| |
| void deleteLineBoxTree(); |
| virtual void dirtyLinesFromChangedChild(RenderObject* child) { m_lineBoxes.dirtyLinesFromChangedChild(this, child); } |
| |
| // The height (and width) of a block when you include overflow spillage out of the bottom |
| // of the block (e.g., a <div style="height:25px"> that has a 100px tall image inside |
| // it would have an overflow height of borderTop() + paddingTop() + 100px. |
| virtual int overflowHeight(bool includeInterior = true) const; |
| virtual int overflowWidth(bool includeInterior = true) const; |
| virtual int overflowLeft(bool includeInterior = true) const; |
| virtual int overflowTop(bool includeInterior = true) const; |
| virtual IntRect overflowRect(bool includeInterior = true) const; |
| virtual void setOverflowHeight(int h) { m_overflowHeight = h; } |
| virtual void setOverflowWidth(int w) { m_overflowWidth = w; } |
| |
| void addVisualOverflow(const IntRect&); |
| |
| virtual bool isSelfCollapsingBlock() const; |
| |
| virtual int maxTopMargin(bool positive) const { return positive ? maxTopPosMargin() : maxTopNegMargin(); } |
| virtual int maxBottomMargin(bool positive) const { return positive ? maxBottomPosMargin() : maxBottomNegMargin(); } |
| |
| int maxTopPosMargin() const { return m_maxMargin ? m_maxMargin->m_topPos : MaxMargin::topPosDefault(this); } |
| int maxTopNegMargin() const { return m_maxMargin ? m_maxMargin->m_topNeg : MaxMargin::topNegDefault(this); } |
| int maxBottomPosMargin() const { return m_maxMargin ? m_maxMargin->m_bottomPos : MaxMargin::bottomPosDefault(this); } |
| int maxBottomNegMargin() const { return m_maxMargin ? m_maxMargin->m_bottomNeg : MaxMargin::bottomNegDefault(this); } |
| void setMaxTopMargins(int pos, int neg); |
| void setMaxBottomMargins(int pos, int neg); |
| |
| void initMaxMarginValues() |
| { |
| if (m_maxMargin) { |
| m_maxMargin->m_topPos = MaxMargin::topPosDefault(this); |
| m_maxMargin->m_topNeg = MaxMargin::topNegDefault(this); |
| m_maxMargin->m_bottomPos = MaxMargin::bottomPosDefault(this); |
| m_maxMargin->m_bottomNeg = MaxMargin::bottomNegDefault(this); |
| } |
| } |
| |
| virtual void addChild(RenderObject* newChild, RenderObject* beforeChild = 0); |
| virtual void removeChild(RenderObject*); |
| |
| virtual void repaintOverhangingFloats(bool paintAllDescendants); |
| |
| virtual void layout(); |
| virtual void layoutBlock(bool relayoutChildren); |
| void layoutBlockChildren(bool relayoutChildren, int& maxFloatBottom); |
| void layoutInlineChildren(bool relayoutChildren, int& repaintTop, int& repaintBottom); |
| |
| void layoutPositionedObjects(bool relayoutChildren); |
| void insertPositionedObject(RenderBox*); |
| void removePositionedObject(RenderBox*); |
| void removePositionedObjects(RenderBlock*); |
| |
| void addPercentHeightDescendant(RenderBox*); |
| static void removePercentHeightDescendant(RenderBox*); |
| HashSet<RenderBox*>* percentHeightDescendants() const; |
| |
| virtual void positionListMarker() { } |
| |
| virtual void borderFitAdjust(int& x, int& w) const; // Shrink the box in which the border paints if border-fit is set. |
| |
| virtual void updateBeforeAfterContent(PseudoId); |
| |
| RootInlineBox* createAndAppendRootInlineBox(); |
| virtual RootInlineBox* createRootInlineBox(); // Subclassed by SVG and Ruby. |
| |
| // Called to lay out the legend for a fieldset. |
| virtual RenderObject* layoutLegend(bool /*relayoutChildren*/) { return 0; } |
| |
| // the implementation of the following functions is in bidi.cpp |
| struct FloatWithRect { |
| FloatWithRect(RenderBox* f) |
| : object(f) |
| , rect(IntRect(f->x() - f->marginLeft(), f->y() - f->marginTop(), f->width() + f->marginLeft() + f->marginRight(), f->height() + f->marginTop() + f->marginBottom())) |
| , everHadLayout(f->m_everHadLayout) |
| { |
| } |
| |
| RenderBox* object; |
| IntRect rect; |
| bool everHadLayout; |
| }; |
| |
| void bidiReorderLine(InlineBidiResolver&, const InlineIterator& end, bool previousLineBrokeCleanly); |
| RootInlineBox* determineStartPosition(bool& firstLine, bool& fullLayout, bool& previousLineBrokeCleanly, |
| InlineBidiResolver&, Vector<FloatWithRect>& floats, unsigned& numCleanFloats); |
| RootInlineBox* determineEndPosition(RootInlineBox* startBox, InlineIterator& cleanLineStart, |
| BidiStatus& cleanLineBidiStatus, |
| int& yPos); |
| bool matchedEndLine(const InlineBidiResolver&, const InlineIterator& endLineStart, const BidiStatus& endLineStatus, |
| RootInlineBox*& endLine, int& endYPos, int& repaintBottom, int& repaintTop); |
| bool generatesLineBoxesForInlineChild(RenderObject*, bool isLineEmpty = true, bool previousLineBrokeCleanly = true); |
| void skipTrailingWhitespace(InlineIterator&, bool isLineEmpty, bool previousLineBrokeCleanly); |
| int skipLeadingWhitespace(InlineBidiResolver&, bool firstLine, bool isLineEmpty, bool previousLineBrokeCleanly); |
| void fitBelowFloats(int widthToFit, bool firstLine, int& availableWidth); |
| InlineIterator findNextLineBreak(InlineBidiResolver&, bool firstLine, bool& isLineEmpty, bool& previousLineBrokeCleanly, EClear* clear = 0); |
| RootInlineBox* constructLine(unsigned runCount, BidiRun* firstRun, BidiRun* lastRun, bool firstLine, bool lastLine, RenderObject* endObject); |
| InlineFlowBox* createLineBoxes(RenderObject*, bool firstLine); |
| void computeHorizontalPositionsForLine(RootInlineBox*, bool firstLine, BidiRun* firstRun, BidiRun* trailingSpaceRun, bool reachedEnd); |
| void computeVerticalPositionsForLine(RootInlineBox*, BidiRun*); |
| void checkLinesForOverflow(); |
| void deleteEllipsisLineBoxes(); |
| void checkLinesForTextOverflow(); |
| // end bidi.cpp functions |
| |
| virtual void paint(PaintInfo&, int tx, int ty); |
| virtual void paintObject(PaintInfo&, int tx, int ty); |
| void paintFloats(PaintInfo&, int tx, int ty, bool preservePhase = false); |
| void paintContents(PaintInfo&, int tx, int ty); |
| void paintColumnContents(PaintInfo&, int tx, int ty, bool paintFloats = false); |
| void paintColumnRules(PaintInfo&, int tx, int ty); |
| void paintChildren(PaintInfo&, int tx, int ty); |
| void paintEllipsisBoxes(PaintInfo&, int tx, int ty); |
| void paintSelection(PaintInfo&, int tx, int ty); |
| void paintCaret(PaintInfo&, int tx, int ty, CaretType); |
| |
| void insertFloatingObject(RenderBox*); |
| void removeFloatingObject(RenderBox*); |
| |
| // Called from lineWidth, to position the floats added in the last line. |
| // Returns ture if and only if it has positioned any floats. |
| bool positionNewFloats(); |
| void clearFloats(); |
| int getClearDelta(RenderBox* child, int yPos); |
| void markAllDescendantsWithFloatsForLayout(RenderBox* floatToRemove = 0, bool inLayout = true); |
| void markPositionedObjectsForLayout(); |
| |
| bool containsFloats() { return m_floatingObjects && !m_floatingObjects->isEmpty(); } |
| bool containsFloat(RenderObject*); |
| |
| virtual bool avoidsFloats() const; |
| |
| bool hasOverhangingFloats() { return parent() && !hasColumns() && floatBottom() > height(); } |
| void addIntrudingFloats(RenderBlock* prev, int xoffset, int yoffset); |
| int addOverhangingFloats(RenderBlock* child, int xoffset, int yoffset, bool makeChildPaintOtherFloats); |
| |
| int nextFloatBottomBelow(int) const; |
| int floatBottom() const; |
| inline int leftBottom(); |
| inline int rightBottom(); |
| IntRect floatRect() const; |
| |
| int lineWidth(int y, bool firstLine) const; |
| virtual int lowestPosition(bool includeOverflowInterior = true, bool includeSelf = true) const; |
| virtual int rightmostPosition(bool includeOverflowInterior = true, bool includeSelf = true) const; |
| virtual int leftmostPosition(bool includeOverflowInterior = true, bool includeSelf = true) const; |
| |
| int rightOffset() const; |
| int rightRelOffset(int y, int fixedOffset, bool applyTextIndent = true, int* heightRemaining = 0) const; |
| int rightOffset(int y, bool firstLine) const { return rightRelOffset(y, rightOffset(), firstLine); } |
| |
| int leftOffset() const; |
| int leftRelOffset(int y, int fixedOffset, bool applyTextIndent = true, int* heightRemaining = 0) const; |
| int leftOffset(int y, bool firstLine) const { return leftRelOffset(y, leftOffset(), firstLine); } |
| |
| virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, int x, int y, int tx, int ty, HitTestAction); |
| virtual bool hitTestColumns(const HitTestRequest&, HitTestResult&, int x, int y, int tx, int ty, HitTestAction); |
| virtual bool hitTestContents(const HitTestRequest&, HitTestResult&, int x, int y, int tx, int ty, HitTestAction); |
| |
| virtual bool isPointInOverflowControl(HitTestResult&, int x, int y, int tx, int ty); |
| |
| virtual VisiblePosition positionForPoint(const IntPoint&); |
| |
| // Block flows subclass availableWidth to handle multi column layout (shrinking the width available to children when laying out.) |
| virtual int availableWidth() const; |
| |
| virtual void calcPrefWidths(); |
| void calcInlinePrefWidths(); |
| void calcBlockPrefWidths(); |
| |
| virtual int firstLineBoxBaseline() const; |
| virtual int lastLineBoxBaseline() const; |
| |
| RootInlineBox* firstRootBox() const { return static_cast<RootInlineBox*>(firstLineBox()); } |
| RootInlineBox* lastRootBox() const { return static_cast<RootInlineBox*>(lastLineBox()); } |
| |
| bool containsNonZeroBidiLevel() const; |
| |
| // Obtains the nearest enclosing block (including this block) that contributes a first-line style to our inline |
| // children. |
| virtual RenderBlock* firstLineBlock() const; |
| virtual void updateFirstLetter(); |
| |
| bool inRootBlockContext() const; |
| |
| virtual IntRect rectWithOutlineForRepaint(RenderBoxModelObject* repaintContainer, int outlineWidth); |
| virtual RenderStyle* outlineStyleForRepaint() const; |
| |
| virtual RenderObject* hoverAncestor() const; |
| virtual void updateDragState(bool dragOn); |
| virtual void updateHitTestResult(HitTestResult&, const IntPoint&); |
| |
| virtual void childBecameNonInline(RenderObject* child); |
| |
| virtual void setSelectionState(SelectionState s); |
| |
| virtual IntRect selectionRectForRepaint(RenderBoxModelObject* repaintContainer, bool /*clipToVisibleContent*/) |
| { |
| return selectionGapRectsForRepaint(repaintContainer); |
| } |
| GapRects selectionGapRectsForRepaint(RenderBoxModelObject* repaintContainer); |
| virtual bool shouldPaintSelectionGaps() const; |
| bool isSelectionRoot() const; |
| GapRects fillSelectionGaps(RenderBlock* rootBlock, int blockX, int blockY, int tx, int ty, |
| int& lastTop, int& lastLeft, int& lastRight, const PaintInfo* = 0); |
| GapRects fillInlineSelectionGaps(RenderBlock* rootBlock, int blockX, int blockY, int tx, int ty, |
| int& lastTop, int& lastLeft, int& lastRight, const PaintInfo*); |
| GapRects fillBlockSelectionGaps(RenderBlock* rootBlock, int blockX, int blockY, int tx, int ty, |
| int& lastTop, int& lastLeft, int& lastRight, const PaintInfo*); |
| IntRect fillVerticalSelectionGap(int lastTop, int lastLeft, int lastRight, int bottomY, RenderBlock* rootBlock, |
| int blockX, int blockY, const PaintInfo*); |
| IntRect fillLeftSelectionGap(RenderObject* selObj, int xPos, int yPos, int height, RenderBlock* rootBlock, |
| int blockX, int blockY, int tx, int ty, const PaintInfo*); |
| IntRect fillRightSelectionGap(RenderObject* selObj, int xPos, int yPos, int height, RenderBlock* rootBlock, |
| int blockX, int blockY, int tx, int ty, const PaintInfo*); |
| IntRect fillHorizontalSelectionGap(RenderObject* selObj, int xPos, int yPos, int width, int height, const PaintInfo*); |
| |
| void getHorizontalSelectionGapInfo(SelectionState, bool& leftGap, bool& rightGap); |
| int leftSelectionOffset(RenderBlock* rootBlock, int y); |
| int rightSelectionOffset(RenderBlock* rootBlock, int y); |
| |
| virtual void absoluteRects(Vector<IntRect>&, int tx, int ty); |
| virtual void absoluteQuads(Vector<FloatQuad>&); |
| |
| // Helper methods for computing line counts and heights for line counts. |
| RootInlineBox* lineAtIndex(int); |
| int lineCount(); |
| int heightForLineCount(int); |
| void clearTruncation(); |
| |
| int desiredColumnWidth() const; |
| unsigned desiredColumnCount() const; |
| Vector<IntRect>* columnRects() const; |
| void setDesiredColumnCountAndWidth(int count, int width); |
| int columnGap() const; |
| |
| void adjustRectForColumns(IntRect&) const; |
| |
| void addContinuationWithOutline(RenderInline*); |
| void paintContinuationOutlines(PaintInfo&, int tx, int ty); |
| |
| RenderInline* inlineContinuation() const { return m_inlineContinuation; } |
| void setInlineContinuation(RenderInline* c) { m_inlineContinuation = c; } |
| |
| virtual IntRect localCaretRect(InlineBox*, int caretOffset, int* extraWidthToEndOfLine = 0); |
| |
| virtual void addFocusRingRects(GraphicsContext*, int tx, int ty); |
| |
| // This function is a convenience helper for creating an anonymous block that inherits its |
| // style from this RenderBlock. |
| RenderBlock* createAnonymousBlock() const; |
| |
| // Delay update scrollbar until finishDelayRepaint() will be |
| // called. This function is used when a flexbox is layouting its |
| // descendant. If multiple startDelayRepaint() is called, |
| // finishDelayRepaint() will do nothing until finishDelayRepaint() |
| // is called same times. |
| static void startDelayUpdateScrollInfo(); |
| static void finishDelayUpdateScrollInfo(); |
| |
| private: |
| void adjustPointToColumnContents(IntPoint&) const; |
| void adjustForBorderFit(int x, int& left, int& right) const; // Helper function for borderFitAdjust |
| |
| void markLinesDirtyInVerticalRange(int top, int bottom); |
| |
| protected: |
| virtual void styleWillChange(StyleDifference, const RenderStyle* newStyle); |
| virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle); |
| |
| void newLine(EClear); |
| virtual bool hasLineIfEmpty() const; |
| bool layoutOnlyPositionedObjects(); |
| |
| |
| private: |
| Position positionForBox(InlineBox*, bool start = true) const; |
| Position positionForRenderer(RenderObject*, bool start = true) const; |
| VisiblePosition positionForPointWithInlineChildren(const IntPoint&); |
| |
| // Adjust tx and ty from painting offsets to the local coords of this renderer |
| void offsetForContents(int& tx, int& ty) const; |
| |
| void calcColumnWidth(); |
| int layoutColumns(int endOfContent = -1); |
| |
| bool expandsToEncloseOverhangingFloats() const; |
| |
| void updateScrollInfoAfterLayout(); |
| |
| protected: |
| struct FloatingObject { |
| enum Type { |
| FloatLeft, |
| FloatRight |
| }; |
| |
| FloatingObject(Type type) |
| : m_renderer(0) |
| , m_top(0) |
| , m_bottom(0) |
| , m_left(0) |
| , m_width(0) |
| , m_type(type) |
| , m_shouldPaint(true) |
| , m_isDescendant(false) |
| { |
| } |
| |
| Type type() { return static_cast<Type>(m_type); } |
| |
| RenderBox* m_renderer; |
| int m_top; |
| int m_bottom; |
| int m_left; |
| int m_width; |
| unsigned m_type : 1; // Type (left or right aligned) |
| bool m_shouldPaint : 1; |
| bool m_isDescendant : 1; |
| }; |
| |
| class MarginInfo { |
| // Collapsing flags for whether we can collapse our margins with our children's margins. |
| bool m_canCollapseWithChildren : 1; |
| bool m_canCollapseTopWithChildren : 1; |
| bool m_canCollapseBottomWithChildren : 1; |
| |
| // Whether or not we are a quirky container, i.e., do we collapse away top and bottom |
| // margins in our container. Table cells and the body are the common examples. We |
| // also have a custom style property for Safari RSS to deal with TypePad blog articles. |
| bool m_quirkContainer : 1; |
| |
| // This flag tracks whether we are still looking at child margins that can all collapse together at the beginning of a block. |
| // They may or may not collapse with the top margin of the block (|m_canCollapseTopWithChildren| tells us that), but they will |
| // always be collapsing with one another. This variable can remain set to true through multiple iterations |
| // as long as we keep encountering self-collapsing blocks. |
| bool m_atTopOfBlock : 1; |
| |
| // This flag is set when we know we're examining bottom margins and we know we're at the bottom of the block. |
| bool m_atBottomOfBlock : 1; |
| |
| // If our last normal flow child was a self-collapsing block that cleared a float, |
| // we track it in this variable. |
| bool m_selfCollapsingBlockClearedFloat : 1; |
| |
| // These variables are used to detect quirky margins that we need to collapse away (in table cells |
| // and in the body element). |
| bool m_topQuirk : 1; |
| bool m_bottomQuirk : 1; |
| bool m_determinedTopQuirk : 1; |
| |
| // These flags track the previous maximal positive and negative margins. |
| int m_posMargin; |
| int m_negMargin; |
| |
| public: |
| MarginInfo(RenderBlock* b, int top, int bottom); |
| |
| void setAtTopOfBlock(bool b) { m_atTopOfBlock = b; } |
| void setAtBottomOfBlock(bool b) { m_atBottomOfBlock = b; } |
| void clearMargin() { m_posMargin = m_negMargin = 0; } |
| void setSelfCollapsingBlockClearedFloat(bool b) { m_selfCollapsingBlockClearedFloat = b; } |
| void setTopQuirk(bool b) { m_topQuirk = b; } |
| void setBottomQuirk(bool b) { m_bottomQuirk = b; } |
| void setDeterminedTopQuirk(bool b) { m_determinedTopQuirk = b; } |
| void setPosMargin(int p) { m_posMargin = p; } |
| void setNegMargin(int n) { m_negMargin = n; } |
| void setPosMarginIfLarger(int p) { if (p > m_posMargin) m_posMargin = p; } |
| void setNegMarginIfLarger(int n) { if (n > m_negMargin) m_negMargin = n; } |
| |
| void setMargin(int p, int n) { m_posMargin = p; m_negMargin = n; } |
| |
| bool atTopOfBlock() const { return m_atTopOfBlock; } |
| bool canCollapseWithTop() const { return m_atTopOfBlock && m_canCollapseTopWithChildren; } |
| bool canCollapseWithBottom() const { return m_atBottomOfBlock && m_canCollapseBottomWithChildren; } |
| bool canCollapseTopWithChildren() const { return m_canCollapseTopWithChildren; } |
| bool canCollapseBottomWithChildren() const { return m_canCollapseBottomWithChildren; } |
| bool selfCollapsingBlockClearedFloat() const { return m_selfCollapsingBlockClearedFloat; } |
| bool quirkContainer() const { return m_quirkContainer; } |
| bool determinedTopQuirk() const { return m_determinedTopQuirk; } |
| bool topQuirk() const { return m_topQuirk; } |
| bool bottomQuirk() const { return m_bottomQuirk; } |
| int posMargin() const { return m_posMargin; } |
| int negMargin() const { return m_negMargin; } |
| int margin() const { return m_posMargin - m_negMargin; } |
| }; |
| |
| void adjustPositionedBlock(RenderBox* child, const MarginInfo&); |
| void adjustFloatingBlock(const MarginInfo&); |
| bool handleSpecialChild(RenderBox* child, const MarginInfo&); |
| bool handleFloatingChild(RenderBox* child, const MarginInfo&); |
| bool handlePositionedChild(RenderBox* child, const MarginInfo&); |
| bool handleRunInChild(RenderBox* child); |
| int collapseMargins(RenderBox* child, MarginInfo&); |
| int clearFloatsIfNeeded(RenderBox* child, MarginInfo&, int oldTopPosMargin, int oldTopNegMargin, int yPos); |
| int estimateVerticalPosition(RenderBox* child, const MarginInfo&); |
| void determineHorizontalPosition(RenderBox* child); |
| void handleBottomOfBlock(int top, int bottom, MarginInfo&); |
| void setCollapsedBottomMargin(const MarginInfo&); |
| // End helper functions and structs used by layoutBlockChildren. |
| |
| private: |
| typedef ListHashSet<RenderBox*>::const_iterator Iterator; |
| DeprecatedPtrList<FloatingObject>* m_floatingObjects; |
| ListHashSet<RenderBox*>* m_positionedObjects; |
| |
| // An inline can be split with blocks occurring in between the inline content. |
| // When this occurs we need a pointer to our next object. We can basically be |
| // split into a sequence of inlines and blocks. The continuation will either be |
| // an anonymous block (that houses other blocks) or it will be an inline flow. |
| RenderInline* m_inlineContinuation; |
| |
| // Allocated only when some of these fields have non-default values |
| struct MaxMargin { |
| MaxMargin(const RenderBlock* o) |
| : m_topPos(topPosDefault(o)) |
| , m_topNeg(topNegDefault(o)) |
| , m_bottomPos(bottomPosDefault(o)) |
| , m_bottomNeg(bottomNegDefault(o)) |
| { |
| } |
| |
| static int topPosDefault(const RenderBlock* o) { return o->marginTop() > 0 ? o->marginTop() : 0; } |
| static int topNegDefault(const RenderBlock* o) { return o->marginTop() < 0 ? -o->marginTop() : 0; } |
| static int bottomPosDefault(const RenderBlock* o) { return o->marginBottom() > 0 ? o->marginBottom() : 0; } |
| static int bottomNegDefault(const RenderBlock* o) { return o->marginBottom() < 0 ? -o->marginBottom() : 0; } |
| |
| int m_topPos; |
| int m_topNeg; |
| int m_bottomPos; |
| int m_bottomNeg; |
| }; |
| |
| MaxMargin* m_maxMargin; |
| |
| protected: |
| RenderObjectChildList m_children; |
| RenderLineBoxList m_lineBoxes; // All of the root line boxes created for this block flow. For example, <div>Hello<br>world.</div> will have two total lines for the <div>. |
| |
| // How much content overflows out of our block vertically or horizontally. |
| int m_overflowHeight; |
| int m_overflowWidth; |
| int m_overflowLeft; |
| int m_overflowTop; |
| |
| mutable int m_lineHeight; |
| }; |
| |
| inline RenderBlock* toRenderBlock(RenderObject* o) |
| { |
| ASSERT(!o || o->isRenderBlock()); |
| return static_cast<RenderBlock*>(o); |
| } |
| |
| inline const RenderBlock* toRenderBlock(const RenderObject* o) |
| { |
| ASSERT(!o || o->isRenderBlock()); |
| return static_cast<const RenderBlock*>(o); |
| } |
| |
| // This will catch anyone doing an unnecessary cast. |
| void toRenderBlock(const RenderBlock* o); |
| |
| } // namespace WebCore |
| |
| #endif // RenderBlock_h |
