| /* |
| * 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, 2009, 2010 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 "GapRects.h" |
| #include "RenderBox.h" |
| #include "RenderLineBoxList.h" |
| #include "RootInlineBox.h" |
| #include <wtf/OwnPtr.h> |
| #include <wtf/ListHashSet.h> |
| |
| namespace WebCore { |
| |
| class BidiContext; |
| class ColumnInfo; |
| class InlineIterator; |
| class LayoutStateMaintainer; |
| class LazyLineBreakIterator; |
| class LineWidth; |
| class RenderInline; |
| |
| struct BidiRun; |
| struct PaintInfo; |
| |
| template <class Iterator, class Run> class BidiResolver; |
| template <class Run> class BidiRunList; |
| template <class Iterator> struct MidpointState; |
| typedef BidiResolver<InlineIterator, BidiRun> InlineBidiResolver; |
| typedef MidpointState<InlineIterator> LineMidpointState; |
| |
| enum CaretType { CursorCaret, DragCaret }; |
| |
| class RenderBlock : public RenderBox { |
| public: |
| RenderBlock(Node*); |
| virtual ~RenderBlock(); |
| |
| const RenderObjectChildList* children() const { return &m_children; } |
| RenderObjectChildList* children() { return &m_children; } |
| |
| virtual void destroy(); |
| bool beingDestroyed() const { return m_beingDestroyed; } |
| |
| // These two functions are overridden for inline-block. |
| virtual int lineHeight(bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const; |
| virtual int baselinePosition(FontBaseline, bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const; |
| |
| 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 addChild(RenderObject* newChild, RenderObject* beforeChild = 0); |
| virtual void removeChild(RenderObject*); |
| |
| virtual void layoutBlock(bool relayoutChildren, int pageLogicalHeight = 0); |
| |
| void insertPositionedObject(RenderBox*); |
| void removePositionedObject(RenderBox*); |
| void removePositionedObjects(RenderBlock*); |
| |
| typedef ListHashSet<RenderBox*, 4> PositionedObjectsListHashSet; |
| PositionedObjectsListHashSet* positionedObjects() const { return m_positionedObjects.get(); } |
| |
| void addPercentHeightDescendant(RenderBox*); |
| static void removePercentHeightDescendant(RenderBox*); |
| HashSet<RenderBox*>* percentHeightDescendants() const; |
| |
| RootInlineBox* createAndAppendRootInlineBox(); |
| |
| bool generatesLineBoxesForInlineChild(RenderObject*, bool isLineEmpty = true, bool previousLineBrokeCleanly = true); |
| |
| void markAllDescendantsWithFloatsForLayout(RenderBox* floatToRemove = 0, bool inLayout = true); |
| void markSiblingsWithFloatsForLayout(); |
| void markPositionedObjectsForLayout(); |
| virtual void markForPaginationRelayoutIfNeeded(); |
| |
| bool containsFloats() { return m_floatingObjects && !m_floatingObjects->set().isEmpty(); } |
| bool containsFloat(RenderBox*); |
| |
| int availableLogicalWidthForLine(int position, bool firstLine) const; |
| int logicalRightOffsetForLine(int position, bool firstLine) const { return logicalRightOffsetForLine(position, logicalRightOffsetForContent(), firstLine); } |
| int logicalLeftOffsetForLine(int position, bool firstLine) const { return logicalLeftOffsetForLine(position, logicalLeftOffsetForContent(), firstLine); } |
| int startOffsetForLine(int position, bool firstLine) const { return style()->isLeftToRightDirection() ? logicalLeftOffsetForLine(position, firstLine) : logicalRightOffsetForLine(position, firstLine); } |
| |
| 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 availableLogicalWidth() const; |
| |
| IntPoint flipForWritingModeIncludingColumns(const IntPoint&) const; |
| void flipForWritingModeIncludingColumns(IntRect&) const; |
| |
| RootInlineBox* firstRootBox() const { return static_cast<RootInlineBox*>(firstLineBox()); } |
| RootInlineBox* lastRootBox() const { return static_cast<RootInlineBox*>(lastLineBox()); } |
| |
| bool containsNonZeroBidiLevel() const; |
| |
| GapRects selectionGapRectsForRepaint(RenderBoxModelObject* repaintContainer); |
| IntRect logicalLeftSelectionGap(RenderBlock* rootBlock, const IntPoint& rootBlockPhysicalPosition, const IntSize& offsetFromRootBlock, |
| RenderObject* selObj, int logicalLeft, int logicalTop, int logicalHeight, const PaintInfo*); |
| IntRect logicalRightSelectionGap(RenderBlock* rootBlock, const IntPoint& rootBlockPhysicalPosition, const IntSize& offsetFromRootBlock, |
| RenderObject* selObj, int logicalRight, int logicalTop, int logicalHeight, const PaintInfo*); |
| void getSelectionGapInfo(SelectionState, bool& leftGap, bool& rightGap); |
| IntRect logicalRectToPhysicalRect(const IntPoint& physicalPosition, const IntRect& logicalRect); |
| |
| // Helper methods for computing line counts and heights for line counts. |
| RootInlineBox* lineAtIndex(int); |
| int lineCount(); |
| int heightForLineCount(int); |
| void clearTruncation(); |
| |
| void adjustRectForColumns(IntRect&) const; |
| virtual void adjustForColumns(IntSize&, const IntPoint&) const; |
| |
| void addContinuationWithOutline(RenderInline*); |
| bool paintsContinuationOutline(RenderInline*); |
| |
| virtual RenderBoxModelObject* virtualContinuation() const { return continuation(); } |
| bool isAnonymousBlockContinuation() const { return continuation() && isAnonymousBlock(); } |
| RenderInline* inlineElementContinuation() const; |
| RenderBlock* blockElementContinuation() const; |
| |
| using RenderBoxModelObject::continuation; |
| using RenderBoxModelObject::setContinuation; |
| |
| // This function is a convenience helper for creating an anonymous block that inherits its |
| // style from this RenderBlock. |
| RenderBlock* createAnonymousBlock(bool isFlexibleBox = false) const; |
| RenderBlock* createAnonymousColumnsBlock() const; |
| RenderBlock* createAnonymousColumnSpanBlock() const; |
| RenderBlock* createAnonymousBlockWithSameTypeAs(RenderBlock* otherAnonymousBlock) const; |
| |
| static void appendRunsForObject(BidiRunList<BidiRun>&, int start, int end, RenderObject*, InlineBidiResolver&); |
| static bool requiresLineBox(const InlineIterator&, bool isLineEmpty = true, bool previousLineBrokeCleanly = true); |
| |
| ColumnInfo* columnInfo() const; |
| int columnGap() const; |
| |
| // These two functions take the ColumnInfo* to avoid repeated lookups of the info in the global HashMap. |
| unsigned columnCount(ColumnInfo*) const; |
| IntRect columnRectAt(ColumnInfo*, unsigned) const; |
| |
| int paginationStrut() const { return m_rareData ? m_rareData->m_paginationStrut : 0; } |
| void setPaginationStrut(int); |
| |
| // The page logical offset is the object's offset from the top of the page in the page progression |
| // direction (so an x-offset in vertical text and a y-offset for horizontal text). |
| int pageLogicalOffset() const { return m_rareData ? m_rareData->m_pageLogicalOffset : 0; } |
| void setPageLogicalOffset(int); |
| |
| // Accessors for logical width/height and margins in the containing block's block-flow direction. |
| enum ApplyLayoutDeltaMode { ApplyLayoutDelta, DoNotApplyLayoutDelta }; |
| int logicalWidthForChild(RenderBox* child) { return isHorizontalWritingMode() ? child->width() : child->height(); } |
| int logicalHeightForChild(RenderBox* child) { return isHorizontalWritingMode() ? child->height() : child->width(); } |
| int logicalTopForChild(RenderBox* child) { return isHorizontalWritingMode() ? child->y() : child->x(); } |
| void setLogicalLeftForChild(RenderBox* child, int logicalLeft, ApplyLayoutDeltaMode = DoNotApplyLayoutDelta); |
| void setLogicalTopForChild(RenderBox* child, int logicalTop, ApplyLayoutDeltaMode = DoNotApplyLayoutDelta); |
| int marginBeforeForChild(RenderBoxModelObject* child) const; |
| int marginAfterForChild(RenderBoxModelObject* child) const; |
| int marginStartForChild(RenderBoxModelObject* child) const; |
| int marginEndForChild(RenderBoxModelObject* child) const; |
| void setMarginStartForChild(RenderBox* child, int); |
| void setMarginEndForChild(RenderBox* child, int); |
| void setMarginBeforeForChild(RenderBox* child, int); |
| void setMarginAfterForChild(RenderBox* child, int); |
| int collapsedMarginBeforeForChild(RenderBox* child) const; |
| int collapsedMarginAfterForChild(RenderBox* child) const; |
| |
| virtual void updateFirstLetter(); |
| |
| class MarginValues { |
| public: |
| MarginValues(int beforePos, int beforeNeg, int afterPos, int afterNeg) |
| : m_positiveMarginBefore(beforePos) |
| , m_negativeMarginBefore(beforeNeg) |
| , m_positiveMarginAfter(afterPos) |
| , m_negativeMarginAfter(afterNeg) |
| { } |
| |
| int positiveMarginBefore() const { return m_positiveMarginBefore; } |
| int negativeMarginBefore() const { return m_negativeMarginBefore; } |
| int positiveMarginAfter() const { return m_positiveMarginAfter; } |
| int negativeMarginAfter() const { return m_negativeMarginAfter; } |
| |
| void setPositiveMarginBefore(int pos) { m_positiveMarginBefore = pos; } |
| void setNegativeMarginBefore(int neg) { m_negativeMarginBefore = neg; } |
| void setPositiveMarginAfter(int pos) { m_positiveMarginAfter = pos; } |
| void setNegativeMarginAfter(int neg) { m_negativeMarginAfter = neg; } |
| |
| private: |
| int m_positiveMarginBefore; |
| int m_negativeMarginBefore; |
| int m_positiveMarginAfter; |
| int m_negativeMarginAfter; |
| }; |
| MarginValues marginValuesForChild(RenderBox* child); |
| |
| virtual void scrollbarsChanged(bool /*horizontalScrollbarChanged*/, bool /*verticalScrollbarChanged*/) { }; |
| |
| int logicalRightOffsetForContent() const { return isHorizontalWritingMode() ? borderLeft() + paddingLeft() + availableLogicalWidth() : borderTop() + paddingTop() + availableLogicalWidth(); } |
| int logicalLeftOffsetForContent() const { return isHorizontalWritingMode() ? borderLeft() + paddingLeft() : borderTop() + paddingTop(); } |
| |
| protected: |
| // These functions are only used internally to manipulate the render tree structure via remove/insert/appendChildNode. |
| // Since they are typically called only to move objects around within anonymous blocks (which only have layers in |
| // the case of column spans), the default for fullRemoveInsert is false rather than true. |
| void moveChildTo(RenderBlock* to, RenderObject* child, bool fullRemoveInsert = false) |
| { |
| return moveChildTo(to, child, 0, fullRemoveInsert); |
| } |
| void moveChildTo(RenderBlock* to, RenderObject* child, RenderObject* beforeChild, bool fullRemoveInsert = false); |
| void moveAllChildrenTo(RenderBlock* to, bool fullRemoveInsert = false) |
| { |
| return moveAllChildrenTo(to, 0, fullRemoveInsert); |
| } |
| void moveAllChildrenTo(RenderBlock* to, RenderObject* beforeChild, bool fullRemoveInsert = false) |
| { |
| return moveChildrenTo(to, firstChild(), 0, beforeChild, fullRemoveInsert); |
| } |
| // Move all of the kids from |startChild| up to but excluding |endChild|. 0 can be passed as the endChild to denote |
| // that all the kids from |startChild| onwards should be added. |
| void moveChildrenTo(RenderBlock* to, RenderObject* startChild, RenderObject* endChild, bool fullRemoveInsert = false) |
| { |
| return moveChildrenTo(to, startChild, endChild, 0, fullRemoveInsert); |
| } |
| void moveChildrenTo(RenderBlock* to, RenderObject* startChild, RenderObject* endChild, RenderObject* beforeChild, bool fullRemoveInsert = false); |
| |
| int maxPositiveMarginBefore() const { return m_rareData ? m_rareData->m_margins.positiveMarginBefore() : RenderBlockRareData::positiveMarginBeforeDefault(this); } |
| int maxNegativeMarginBefore() const { return m_rareData ? m_rareData->m_margins.negativeMarginBefore() : RenderBlockRareData::negativeMarginBeforeDefault(this); } |
| int maxPositiveMarginAfter() const { return m_rareData ? m_rareData->m_margins.positiveMarginAfter() : RenderBlockRareData::positiveMarginAfterDefault(this); } |
| int maxNegativeMarginAfter() const { return m_rareData ? m_rareData->m_margins.negativeMarginAfter() : RenderBlockRareData::negativeMarginAfterDefault(this); } |
| |
| void setMaxMarginBeforeValues(int pos, int neg); |
| void setMaxMarginAfterValues(int pos, int neg); |
| |
| void initMaxMarginValues() |
| { |
| if (m_rareData) { |
| m_rareData->m_margins = MarginValues(RenderBlockRareData::positiveMarginBeforeDefault(this) , RenderBlockRareData::negativeMarginBeforeDefault(this), |
| RenderBlockRareData::positiveMarginAfterDefault(this), RenderBlockRareData::negativeMarginAfterDefault(this)); |
| m_rareData->m_paginationStrut = 0; |
| } |
| } |
| |
| virtual void layout(); |
| |
| void layoutPositionedObjects(bool relayoutChildren); |
| |
| virtual void paint(PaintInfo&, int tx, int ty); |
| virtual void paintObject(PaintInfo&, int tx, int ty); |
| |
| int logicalRightOffsetForLine(int position, int fixedOffset, bool applyTextIndent = true, int* logicalHeightRemaining = 0) const; |
| int logicalLeftOffsetForLine(int position, int fixedOffset, bool applyTextIndent = true, int* logicalHeightRemaining = 0) const; |
| |
| virtual ETextAlign textAlignmentForLine(bool endsWithSoftBreak) const; |
| virtual void adjustInlineDirectionLineBounds(int /* expansionOpportunityCount */, float& /* logicalLeft */, float& /* logicalWidth */) const { } |
| |
| virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, int x, int y, int tx, int ty, HitTestAction); |
| |
| virtual void computePreferredLogicalWidths(); |
| |
| virtual int firstLineBoxBaseline() const; |
| virtual int lastLineBoxBaseline() const; |
| |
| virtual void updateHitTestResult(HitTestResult&, const IntPoint&); |
| |
| // Delay update scrollbar until finishDelayRepaint() will be |
| // called. This function is used when a flexbox is laying out its |
| // descendant. If multiple calls are made to startDelayRepaint(), |
| // finishDelayRepaint() will do nothing until finishDelayRepaint() |
| // is called the same number of times. |
| static void startDelayUpdateScrollInfo(); |
| static void finishDelayUpdateScrollInfo(); |
| |
| virtual void styleWillChange(StyleDifference, const RenderStyle* newStyle); |
| virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle); |
| |
| virtual bool hasLineIfEmpty() const; |
| |
| bool simplifiedLayout(); |
| void simplifiedNormalFlowLayout(); |
| |
| void computeOverflow(int oldClientAfterEdge, bool recomputeFloats = false); |
| virtual void addOverflowFromChildren(); |
| void addOverflowFromFloats(); |
| void addOverflowFromPositionedObjects(); |
| void addOverflowFromBlockChildren(); |
| void addOverflowFromInlineChildren(); |
| |
| virtual void addFocusRingRects(Vector<IntRect>&, int tx, int ty); |
| |
| #if ENABLE(SVG) |
| // Only used by RenderSVGText, which explicitely overrides RenderBlock::layoutBlock(), do NOT use for anything else. |
| void forceLayoutInlineChildren() |
| { |
| int repaintLogicalTop = 0; |
| int repaintLogicalBottom = 0; |
| layoutInlineChildren(true, repaintLogicalTop, repaintLogicalBottom); |
| } |
| #endif |
| |
| private: |
| virtual RenderObjectChildList* virtualChildren() { return children(); } |
| virtual const RenderObjectChildList* virtualChildren() const { return children(); } |
| |
| virtual const char* renderName() 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); |
| |
| virtual void dirtyLinesFromChangedChild(RenderObject* child) { m_lineBoxes.dirtyLinesFromChangedChild(this, child); } |
| |
| void addChildToContinuation(RenderObject* newChild, RenderObject* beforeChild); |
| void addChildIgnoringContinuation(RenderObject* newChild, RenderObject* beforeChild); |
| void addChildToAnonymousColumnBlocks(RenderObject* newChild, RenderObject* beforeChild); |
| virtual void addChildIgnoringAnonymousColumnBlocks(RenderObject* newChild, RenderObject* beforeChild = 0); |
| |
| virtual bool isSelfCollapsingBlock() const; |
| |
| virtual int collapsedMarginBefore() const { return maxPositiveMarginBefore() - maxNegativeMarginBefore(); } |
| virtual int collapsedMarginAfter() const { return maxPositiveMarginAfter() - maxNegativeMarginAfter(); } |
| |
| virtual void repaintOverhangingFloats(bool paintAllDescendants); |
| |
| void layoutBlockChildren(bool relayoutChildren, int& maxFloatLogicalBottom); |
| void layoutInlineChildren(bool relayoutChildren, int& repaintLogicalTop, int& repaintLogicalBottom); |
| BidiRun* handleTrailingSpaces(BidiRunList<BidiRun>&, BidiContext*); |
| |
| 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); |
| |
| virtual RootInlineBox* createRootInlineBox(); // Subclassed by SVG and Ruby. |
| |
| // Called to lay out the legend for a fieldset or the ruby text of a ruby run. |
| virtual RenderObject* layoutSpecialExcludedChild(bool /*relayoutChildren*/) { return 0; } |
| |
| 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; |
| }; |
| |
| struct FloatingObject { |
| WTF_MAKE_NONCOPYABLE(FloatingObject); WTF_MAKE_FAST_ALLOCATED; |
| public: |
| // Note that Type uses bits so you can use FloatBoth as a mask to query for both left and right. |
| enum Type { FloatLeft = 1, FloatRight = 2, FloatBoth = 3 }; |
| |
| FloatingObject(Type type) |
| : m_renderer(0) |
| , m_originatingLine(0) |
| , m_paginationStrut(0) |
| , m_type(type) |
| , m_shouldPaint(true) |
| , m_isDescendant(false) |
| , m_isPlaced(false) |
| { |
| } |
| |
| FloatingObject(Type type, const IntRect& frameRect) |
| : m_renderer(0) |
| , m_originatingLine(0) |
| , m_frameRect(frameRect) |
| , m_paginationStrut(0) |
| , m_type(type) |
| , m_shouldPaint(true) |
| , m_isDescendant(false) |
| , m_isPlaced(true) |
| { |
| } |
| |
| Type type() const { return static_cast<Type>(m_type); } |
| RenderBox* renderer() const { return m_renderer; } |
| |
| bool isPlaced() const { return m_isPlaced; } |
| void setIsPlaced(bool placed = true) { m_isPlaced = placed; } |
| |
| int x() const { ASSERT(isPlaced()); return m_frameRect.x(); } |
| int maxX() const { ASSERT(isPlaced()); return m_frameRect.maxX(); } |
| int y() const { ASSERT(isPlaced()); return m_frameRect.y(); } |
| int maxY() const { ASSERT(isPlaced()); return m_frameRect.maxY(); } |
| int width() const { return m_frameRect.width(); } |
| int height() const { return m_frameRect.height(); } |
| |
| void setX(int x) { m_frameRect.setX(x); } |
| void setY(int y) { m_frameRect.setY(y); } |
| void setWidth(int width) { m_frameRect.setWidth(width); } |
| void setHeight(int height) { m_frameRect.setHeight(height); } |
| |
| const IntRect& frameRect() const { ASSERT(isPlaced()); return m_frameRect; } |
| void setFrameRect(const IntRect& frameRect) { m_frameRect = frameRect; } |
| |
| RenderBox* m_renderer; |
| RootInlineBox* m_originatingLine; |
| IntRect m_frameRect; |
| int m_paginationStrut; |
| unsigned m_type : 2; // Type (left or right aligned) |
| bool m_shouldPaint : 1; |
| bool m_isDescendant : 1; |
| bool m_isPlaced : 1; |
| }; |
| |
| IntPoint flipFloatForWritingMode(const FloatingObject*, const IntPoint&) const; |
| |
| int logicalTopForFloat(const FloatingObject* child) const { return isHorizontalWritingMode() ? child->y() : child->x(); } |
| int logicalBottomForFloat(const FloatingObject* child) const { return isHorizontalWritingMode() ? child->maxY() : child->maxX(); } |
| int logicalLeftForFloat(const FloatingObject* child) const { return isHorizontalWritingMode() ? child->x() : child->y(); } |
| int logicalRightForFloat(const FloatingObject* child) const { return isHorizontalWritingMode() ? child->maxX() : child->maxY(); } |
| int logicalWidthForFloat(const FloatingObject* child) const { return isHorizontalWritingMode() ? child->width() : child->height(); } |
| void setLogicalTopForFloat(FloatingObject* child, int logicalTop) |
| { |
| if (isHorizontalWritingMode()) |
| child->setY(logicalTop); |
| else |
| child->setX(logicalTop); |
| } |
| void setLogicalLeftForFloat(FloatingObject* child, int logicalLeft) |
| { |
| if (isHorizontalWritingMode()) |
| child->setX(logicalLeft); |
| else |
| child->setY(logicalLeft); |
| } |
| void setLogicalHeightForFloat(FloatingObject* child, int logicalHeight) |
| { |
| if (isHorizontalWritingMode()) |
| child->setHeight(logicalHeight); |
| else |
| child->setWidth(logicalHeight); |
| } |
| void setLogicalWidthForFloat(FloatingObject* child, int logicalWidth) |
| { |
| if (isHorizontalWritingMode()) |
| child->setWidth(logicalWidth); |
| else |
| child->setHeight(logicalWidth); |
| } |
| |
| int xPositionForFloatIncludingMargin(const FloatingObject* child) const |
| { |
| if (isHorizontalWritingMode()) |
| return child->x() + child->renderer()->marginLeft(); |
| else |
| return child->x() + marginBeforeForChild(child->renderer()); |
| } |
| |
| int yPositionForFloatIncludingMargin(const FloatingObject* child) const |
| { |
| if (isHorizontalWritingMode()) |
| return child->y() + marginBeforeForChild(child->renderer()); |
| else |
| return child->y() + child->renderer()->marginTop(); |
| } |
| |
| // The following functions' implementations are in RenderBlockLineLayout.cpp. |
| void checkFloatsInCleanLine(RootInlineBox*, Vector<FloatWithRect>&, size_t& floatIndex, bool& encounteredNewFloat, bool& dirtiedByFloat); |
| RootInlineBox* determineStartPosition(bool& firstLine, bool& fullLayout, bool& previousLineBrokeCleanly, |
| InlineBidiResolver&, Vector<FloatWithRect>& floats, unsigned& numCleanFloats, |
| bool& useRepaintBounds, int& repaintTop, int& repaintBottom); |
| RootInlineBox* determineEndPosition(RootInlineBox* startBox, Vector<FloatWithRect>& floats, size_t floatIndex, InlineIterator& cleanLineStart, |
| BidiStatus& cleanLineBidiStatus, int& yPos); |
| bool matchedEndLine(const InlineBidiResolver&, const InlineIterator& endLineStart, const BidiStatus& endLineStatus, |
| RootInlineBox*& endLine, int& endYPos, int& repaintBottom, int& repaintTop); |
| |
| void skipTrailingWhitespace(InlineIterator&, bool isLineEmpty, bool previousLineBrokeCleanly); |
| void skipLeadingWhitespace(InlineBidiResolver&, bool isLineEmpty, bool previousLineBrokeCleanly, FloatingObject* lastFloatFromPreviousLine, LineWidth&); |
| typedef std::pair<RenderText*, LazyLineBreakIterator> LineBreakIteratorInfo; |
| InlineIterator findNextLineBreak(InlineBidiResolver&, bool firstLine, bool& isLineEmpty, LineBreakIteratorInfo&, bool& previousLineBrokeCleanly, bool& hyphenated, |
| EClear*, FloatingObject* lastFloatFromPreviousLine, Vector<RenderBox*>& positionedObjects); |
| RootInlineBox* constructLine(BidiRunList<BidiRun>&, bool firstLine, bool lastLine); |
| InlineFlowBox* createLineBoxes(RenderObject*, bool firstLine, InlineBox* childBox); |
| |
| void computeInlineDirectionPositionsForLine(RootInlineBox*, bool firstLine, BidiRun* firstRun, BidiRun* trailingSpaceRun, bool reachedEnd, GlyphOverflowAndFallbackFontsMap&, VerticalPositionCache&); |
| void computeBlockDirectionPositionsForLine(RootInlineBox*, BidiRun*, GlyphOverflowAndFallbackFontsMap&, VerticalPositionCache&); |
| void deleteEllipsisLineBoxes(); |
| void checkLinesForTextOverflow(); |
| |
| // Positions new floats and also adjust all floats encountered on the line if any of them |
| // have to move to the next page/column. |
| bool positionNewFloatOnLine(FloatingObject* newFloat, FloatingObject* lastFloatFromPreviousLine, LineWidth&); |
| void appendFloatingObjectToLastLine(FloatingObject*); |
| |
| // End of functions defined in RenderBlockLineLayout.cpp. |
| |
| 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); |
| |
| FloatingObject* insertFloatingObject(RenderBox*); |
| void removeFloatingObject(RenderBox*); |
| void removeFloatingObjectsBelow(FloatingObject*, int logicalOffset); |
| |
| // Called from lineWidth, to position the floats added in the last line. |
| // Returns true if and only if it has positioned any floats. |
| bool positionNewFloats(); |
| |
| void clearFloats(); |
| int getClearDelta(RenderBox* child, int yPos); |
| |
| virtual bool avoidsFloats() const; |
| |
| bool hasOverhangingFloats() { return parent() && !hasColumns() && containsFloats() && lowestFloatLogicalBottom() > logicalHeight(); } |
| bool hasOverhangingFloat(RenderBox*); |
| void addIntrudingFloats(RenderBlock* prev, int xoffset, int yoffset); |
| int addOverhangingFloats(RenderBlock* child, int xoffset, int yoffset, bool makeChildPaintOtherFloats); |
| |
| int lowestFloatLogicalBottom(FloatingObject::Type = FloatingObject::FloatBoth) const; |
| int nextFloatLogicalBottomBelow(int) const; |
| |
| 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); |
| bool hitTestFloats(const HitTestRequest&, HitTestResult&, int x, int y, int tx, int ty); |
| |
| virtual bool isPointInOverflowControl(HitTestResult&, int x, int y, int tx, int ty); |
| |
| void computeInlinePreferredLogicalWidths(); |
| void computeBlockPreferredLogicalWidths(); |
| |
| // Obtains the nearest enclosing block (including this block) that contributes a first-line style to our inline |
| // children. |
| virtual RenderBlock* firstLineBlock() const; |
| |
| virtual IntRect rectWithOutlineForRepaint(RenderBoxModelObject* repaintContainer, int outlineWidth); |
| virtual RenderStyle* outlineStyleForRepaint() const; |
| |
| virtual RenderObject* hoverAncestor() const; |
| virtual void updateDragState(bool dragOn); |
| virtual void childBecameNonInline(RenderObject* child); |
| |
| virtual IntRect selectionRectForRepaint(RenderBoxModelObject* repaintContainer, bool /*clipToVisibleContent*/) |
| { |
| return selectionGapRectsForRepaint(repaintContainer); |
| } |
| virtual bool shouldPaintSelectionGaps() const; |
| bool isSelectionRoot() const; |
| GapRects selectionGaps(RenderBlock* rootBlock, const IntPoint& rootBlockPhysicalPosition, const IntSize& offsetFromRootBlock, |
| int& lastLogicalTop, int& lastLogicalLeft, int& lastLogicalRight, const PaintInfo* = 0); |
| GapRects inlineSelectionGaps(RenderBlock* rootBlock, const IntPoint& rootBlockPhysicalPosition, const IntSize& offsetFromRootBlock, |
| int& lastLogicalTop, int& lastLogicalLeft, int& lastLogicalRight, const PaintInfo*); |
| GapRects blockSelectionGaps(RenderBlock* rootBlock, const IntPoint& rootBlockPhysicalPosition, const IntSize& offsetFromRootBlock, |
| int& lastLogicalTop, int& lastLogicalLeft, int& lastLogicalRight, const PaintInfo*); |
| IntRect blockSelectionGap(RenderBlock* rootBlock, const IntPoint& rootBlockPhysicalPosition, const IntSize& offsetFromRootBlock, |
| int lastLogicalTop, int lastLogicalLeft, int lastLogicalRight, int logicalBottom, const PaintInfo*); |
| int logicalLeftSelectionOffset(RenderBlock* rootBlock, int position); |
| int logicalRightSelectionOffset(RenderBlock* rootBlock, int position); |
| |
| virtual void absoluteRects(Vector<IntRect>&, int tx, int ty); |
| virtual void absoluteQuads(Vector<FloatQuad>&); |
| |
| int desiredColumnWidth() const; |
| unsigned desiredColumnCount() const; |
| void setDesiredColumnCountAndWidth(int count, int width); |
| |
| void paintContinuationOutlines(PaintInfo&, int tx, int ty); |
| |
| virtual IntRect localCaretRect(InlineBox*, int caretOffset, int* extraWidthToEndOfLine = 0); |
| |
| void adjustPointToColumnContents(IntPoint&) const; |
| void adjustForBorderFit(int x, int& left, int& right) const; // Helper function for borderFitAdjust |
| |
| void markLinesDirtyInBlockRange(int logicalTop, int logicalBottom, RootInlineBox* highest = 0); |
| |
| void newLine(EClear); |
| |
| Position positionForBox(InlineBox*, 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(); |
| bool layoutColumns(bool hasSpecifiedPageLogicalHeight, int pageLogicalHeight, LayoutStateMaintainer&); |
| void makeChildrenAnonymousColumnBlocks(RenderObject* beforeChild, RenderBlock* newBlockBox, RenderObject* newChild); |
| |
| bool expandsToEncloseOverhangingFloats() const; |
| |
| void updateScrollInfoAfterLayout(); |
| |
| RenderObject* splitAnonymousBlocksAroundChild(RenderObject* beforeChild); |
| void splitBlocks(RenderBlock* fromBlock, RenderBlock* toBlock, RenderBlock* middleBlock, |
| RenderObject* beforeChild, RenderBoxModelObject* oldCont); |
| void splitFlow(RenderObject* beforeChild, RenderBlock* newBlockBox, |
| RenderObject* newChild, RenderBoxModelObject* oldCont); |
| RenderBlock* clone() const; |
| RenderBlock* continuationBefore(RenderObject* beforeChild); |
| RenderBlock* containingColumnsBlock(bool allowAnonymousColumnBlock = true); |
| RenderBlock* columnsBlockForSpanningElement(RenderObject* newChild); |
| |
| class MarginInfo { |
| // Collapsing flags for whether we can collapse our margins with our children's margins. |
| bool m_canCollapseWithChildren : 1; |
| bool m_canCollapseMarginBeforeWithChildren : 1; |
| bool m_canCollapseMarginAfterWithChildren : 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_atBeforeSideOfBlock : 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_atAfterSideOfBlock : 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_marginBeforeQuirk : 1; |
| bool m_marginAfterQuirk : 1; |
| bool m_determinedMarginBeforeQuirk : 1; |
| |
| // These flags track the previous maximal positive and negative margins. |
| int m_positiveMargin; |
| int m_negativeMargin; |
| |
| public: |
| MarginInfo(RenderBlock* b, int beforeBorderPadding, int afterBorderPadding); |
| |
| void setAtBeforeSideOfBlock(bool b) { m_atBeforeSideOfBlock = b; } |
| void setAtAfterSideOfBlock(bool b) { m_atAfterSideOfBlock = b; } |
| void clearMargin() { m_positiveMargin = m_negativeMargin = 0; } |
| void setMarginBeforeQuirk(bool b) { m_marginBeforeQuirk = b; } |
| void setMarginAfterQuirk(bool b) { m_marginAfterQuirk = b; } |
| void setDeterminedMarginBeforeQuirk(bool b) { m_determinedMarginBeforeQuirk = b; } |
| void setPositiveMargin(int p) { m_positiveMargin = p; } |
| void setNegativeMargin(int n) { m_negativeMargin = n; } |
| void setPositiveMarginIfLarger(int p) { if (p > m_positiveMargin) m_positiveMargin = p; } |
| void setNegativeMarginIfLarger(int n) { if (n > m_negativeMargin) m_negativeMargin = n; } |
| |
| void setMargin(int p, int n) { m_positiveMargin = p; m_negativeMargin = n; } |
| |
| bool atBeforeSideOfBlock() const { return m_atBeforeSideOfBlock; } |
| bool canCollapseWithMarginBefore() const { return m_atBeforeSideOfBlock && m_canCollapseMarginBeforeWithChildren; } |
| bool canCollapseWithMarginAfter() const { return m_atAfterSideOfBlock && m_canCollapseMarginAfterWithChildren; } |
| bool canCollapseMarginBeforeWithChildren() const { return m_canCollapseMarginBeforeWithChildren; } |
| bool canCollapseMarginAfterWithChildren() const { return m_canCollapseMarginAfterWithChildren; } |
| bool quirkContainer() const { return m_quirkContainer; } |
| bool determinedMarginBeforeQuirk() const { return m_determinedMarginBeforeQuirk; } |
| bool marginBeforeQuirk() const { return m_marginBeforeQuirk; } |
| bool marginAfterQuirk() const { return m_marginAfterQuirk; } |
| int positiveMargin() const { return m_positiveMargin; } |
| int negativeMargin() const { return m_negativeMargin; } |
| int margin() const { return m_positiveMargin - m_negativeMargin; } |
| }; |
| |
| void layoutBlockChild(RenderBox* child, MarginInfo&, int& previousFloatLogicalBottom, int& maxFloatLogicalBottom); |
| 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 estimateLogicalTopPosition(RenderBox* child, const MarginInfo&); |
| void determineLogicalLeftPositionForChild(RenderBox* child); |
| void handleAfterSideOfBlock(int top, int bottom, MarginInfo&); |
| void setCollapsedBottomMargin(const MarginInfo&); |
| // End helper functions and structs used by layoutBlockChildren. |
| |
| // Pagination routines. |
| int nextPageLogicalTop(int logicalOffset) const; // Returns the top of the next page following logicalOffset. |
| int applyBeforeBreak(RenderBox* child, int logicalOffset); // If the child has a before break, then return a new yPos that shifts to the top of the next page/column. |
| int applyAfterBreak(RenderBox* child, int logicalOffset, MarginInfo& marginInfo); // If the child has an after break, then return a new offset that shifts to the top of the next page/column. |
| int adjustForUnsplittableChild(RenderBox* child, int logicalOffset, bool includeMargins = false); // If the child is unsplittable and can't fit on the current page, return the top of the next page/column. |
| void adjustLinePositionForPagination(RootInlineBox*, int& deltaOffset); // Computes a deltaOffset value that put a line at the top of the next page if it doesn't fit on the current page. |
| |
| struct FloatingObjectHashFunctions { |
| static unsigned hash(FloatingObject* key) { return DefaultHash<RenderBox*>::Hash::hash(key->m_renderer); } |
| static bool equal(FloatingObject* a, FloatingObject* b) { return a->m_renderer == b->m_renderer; } |
| static const bool safeToCompareToEmptyOrDeleted = true; |
| }; |
| struct FloatingObjectHashTranslator { |
| static unsigned hash(RenderBox* key) { return DefaultHash<RenderBox*>::Hash::hash(key); } |
| static bool equal(FloatingObject* a, RenderBox* b) { return a->m_renderer == b; } |
| }; |
| typedef ListHashSet<FloatingObject*, 4, FloatingObjectHashFunctions> FloatingObjectSet; |
| typedef FloatingObjectSet::const_iterator FloatingObjectSetIterator; |
| class FloatingObjects { |
| public: |
| FloatingObjects() |
| : m_leftObjectsCount(0) |
| , m_rightObjectsCount(0) |
| { |
| } |
| |
| void clear(); |
| void increaseObjectsCount(FloatingObject::Type); |
| void decreaseObjectsCount(FloatingObject::Type); |
| bool hasLeftObjects() const { return m_leftObjectsCount > 0; } |
| bool hasRightObjects() const { return m_rightObjectsCount > 0; } |
| FloatingObjectSet& set() { return m_set; } |
| |
| private: |
| FloatingObjectSet m_set; |
| unsigned m_leftObjectsCount; |
| unsigned m_rightObjectsCount; |
| }; |
| OwnPtr<FloatingObjects> m_floatingObjects; |
| |
| typedef PositionedObjectsListHashSet::const_iterator Iterator; |
| OwnPtr<PositionedObjectsListHashSet> m_positionedObjects; |
| |
| // Allocated only when some of these fields have non-default values |
| struct RenderBlockRareData { |
| WTF_MAKE_NONCOPYABLE(RenderBlockRareData); WTF_MAKE_FAST_ALLOCATED; |
| public: |
| RenderBlockRareData(const RenderBlock* block) |
| : m_margins(positiveMarginBeforeDefault(block), negativeMarginBeforeDefault(block), positiveMarginAfterDefault(block), negativeMarginAfterDefault(block)) |
| , m_paginationStrut(0) |
| , m_pageLogicalOffset(0) |
| { |
| } |
| |
| static int positiveMarginBeforeDefault(const RenderBlock* block) |
| { |
| return std::max(block->marginBefore(), 0); |
| } |
| |
| static int negativeMarginBeforeDefault(const RenderBlock* block) |
| { |
| return std::max(-block->marginBefore(), 0); |
| } |
| static int positiveMarginAfterDefault(const RenderBlock* block) |
| { |
| return std::max(block->marginAfter(), 0); |
| } |
| static int negativeMarginAfterDefault(const RenderBlock* block) |
| { |
| return std::max(-block->marginAfter(), 0); |
| } |
| |
| MarginValues m_margins; |
| int m_paginationStrut; |
| int m_pageLogicalOffset; |
| }; |
| |
| OwnPtr<RenderBlockRareData> m_rareData; |
| |
| 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>. |
| |
| mutable int m_lineHeight : 31; |
| bool m_beingDestroyed : 1; |
| |
| // RenderRubyBase objects need to be able to split and merge, moving their children around |
| // (calling moveChildTo, moveAllChildrenTo, and makeChildrenNonInline). |
| friend class RenderRubyBase; |
| friend class LineWidth; // Needs to know FloatingObject |
| |
| private: |
| // Used to store state between styleWillChange and styleDidChange |
| static bool s_canPropagateFloatIntoSibling; |
| }; |
| |
| inline RenderBlock* toRenderBlock(RenderObject* object) |
| { |
| ASSERT(!object || object->isRenderBlock()); |
| return static_cast<RenderBlock*>(object); |
| } |
| |
| inline const RenderBlock* toRenderBlock(const RenderObject* object) |
| { |
| ASSERT(!object || object->isRenderBlock()); |
| return static_cast<const RenderBlock*>(object); |
| } |
| |
| // This will catch anyone doing an unnecessary cast. |
| void toRenderBlock(const RenderBlock*); |
| |
| } // namespace WebCore |
| |
| #endif // RenderBlock_h |
