| /* |
| * 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 "PODIntervalTree.h" |
| #include "RenderBox.h" |
| #include "RenderLineBoxList.h" |
| #include "RootInlineBox.h" |
| #include "TextRun.h" |
| #include <wtf/OwnPtr.h> |
| #include <wtf/ListHashSet.h> |
| |
| namespace WebCore { |
| |
| class BidiContext; |
| class ColumnInfo; |
| class InlineIterator; |
| class LayoutStateMaintainer; |
| class LazyLineBreakIterator; |
| class LineLayoutState; |
| class LineWidth; |
| class RenderInline; |
| class RenderText; |
| |
| struct BidiRun; |
| struct PaintInfo; |
| class LineInfo; |
| class RenderRubyRun; |
| |
| 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 }; |
| |
| enum TextRunFlag { |
| DefaultTextRunFlags = 0, |
| RespectDirection = 1 << 0, |
| RespectDirectionOverride = 1 << 1 |
| }; |
| |
| typedef unsigned TextRunFlags; |
| |
| class RenderBlock : public RenderBox { |
| public: |
| friend class LineLayoutState; |
| #ifndef NDEBUG |
| // Used by the PODIntervalTree for debugging the FloatingObject. |
| template <class> friend struct ValueToString; |
| #endif |
| |
| RenderBlock(Node*); |
| virtual ~RenderBlock(); |
| |
| const RenderObjectChildList* children() const { return &m_children; } |
| RenderObjectChildList* children() { return &m_children; } |
| |
| bool beingDestroyed() const { return m_beingDestroyed; } |
| |
| // These two functions are overridden for inline-block. |
| virtual LayoutUnit lineHeight(bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const; |
| virtual LayoutUnit 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*); |
| |
| enum BlockLayoutPass { NormalLayoutPass, PositionedFloatLayoutPass }; |
| virtual void layoutBlock(bool relayoutChildren, LayoutUnit pageLogicalHeight = 0, BlockLayoutPass = NormalLayoutPass); |
| |
| 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; |
| #if !ASSERT_DISABLED |
| static bool hasPercentHeightDescendant(RenderBox*); |
| #endif |
| |
| RootInlineBox* createAndAppendRootInlineBox(); |
| |
| bool generatesLineBoxesForInlineChild(RenderObject*); |
| |
| 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*); |
| |
| // Versions that can compute line offsets with the region and page offset passed in. Used for speed to avoid having to |
| // compute the region all over again when you already know it. |
| LayoutUnit availableLogicalWidthForLine(LayoutUnit position, bool firstLine, RenderRegion* region, LayoutUnit offsetFromLogicalTopOfFirstPage) const |
| { |
| return max<LayoutUnit>(0, logicalRightOffsetForLine(position, firstLine, region, offsetFromLogicalTopOfFirstPage) |
| - logicalLeftOffsetForLine(position, firstLine, region, offsetFromLogicalTopOfFirstPage)); |
| } |
| LayoutUnit logicalRightOffsetForLine(LayoutUnit position, bool firstLine, RenderRegion* region, LayoutUnit offsetFromLogicalTopOfFirstPage) const |
| { |
| return logicalRightOffsetForLine(position, logicalRightOffsetForContent(region, offsetFromLogicalTopOfFirstPage), firstLine); |
| } |
| LayoutUnit logicalLeftOffsetForLine(LayoutUnit position, bool firstLine, RenderRegion* region, LayoutUnit offsetFromLogicalTopOfFirstPage) const |
| { |
| return logicalLeftOffsetForLine(position, logicalLeftOffsetForContent(region, offsetFromLogicalTopOfFirstPage), firstLine); |
| } |
| LayoutUnit startOffsetForLine(LayoutUnit position, bool firstLine, RenderRegion* region, LayoutUnit offsetFromLogicalTopOfFirstPage) const |
| { |
| return style()->isLeftToRightDirection() ? logicalLeftOffsetForLine(position, firstLine, region, offsetFromLogicalTopOfFirstPage) |
| : logicalWidth() - logicalRightOffsetForLine(position, firstLine, region, offsetFromLogicalTopOfFirstPage); |
| } |
| |
| LayoutUnit availableLogicalWidthForLine(LayoutUnit position, bool firstLine) const |
| { |
| return availableLogicalWidthForLine(position, firstLine, regionAtBlockOffset(position), offsetFromLogicalTopOfFirstPage()); |
| } |
| LayoutUnit logicalRightOffsetForLine(LayoutUnit position, bool firstLine) const |
| { |
| return logicalRightOffsetForLine(position, logicalRightOffsetForContent(position), firstLine, 0); |
| } |
| LayoutUnit logicalLeftOffsetForLine(LayoutUnit position, bool firstLine) const |
| { |
| return logicalLeftOffsetForLine(position, logicalLeftOffsetForContent(position), firstLine, 0); |
| } |
| LayoutUnit startOffsetForLine(LayoutUnit position, bool firstLine) const |
| { |
| return style()->isLeftToRightDirection() ? logicalLeftOffsetForLine(position, firstLine) |
| : logicalWidth() - logicalRightOffsetForLine(position, firstLine); |
| } |
| |
| LayoutUnit startAlignedOffsetForLine(RenderBox* child, LayoutUnit position, bool firstLine); |
| LayoutUnit textIndentOffset() const; |
| |
| virtual VisiblePosition positionForPoint(const LayoutPoint&); |
| |
| // Block flows subclass availableWidth to handle multi column layout (shrinking the width available to children when laying out.) |
| virtual LayoutUnit availableLogicalWidth() const; |
| |
| LayoutPoint flipForWritingModeIncludingColumns(const LayoutPoint&) const; |
| void adjustStartEdgeForWritingModeIncludingColumns(LayoutRect&) const; |
| |
| RootInlineBox* firstRootBox() const { return static_cast<RootInlineBox*>(firstLineBox()); } |
| RootInlineBox* lastRootBox() const { return static_cast<RootInlineBox*>(lastLineBox()); } |
| |
| bool containsNonZeroBidiLevel() const; |
| |
| GapRects selectionGapRectsForRepaint(RenderBoxModelObject* repaintContainer); |
| LayoutRect logicalLeftSelectionGap(RenderBlock* rootBlock, const LayoutPoint& rootBlockPhysicalPosition, const LayoutSize& offsetFromRootBlock, |
| RenderObject* selObj, LayoutUnit logicalLeft, LayoutUnit logicalTop, LayoutUnit logicalHeight, const PaintInfo*); |
| LayoutRect logicalRightSelectionGap(RenderBlock* rootBlock, const LayoutPoint& rootBlockPhysicalPosition, const LayoutSize& offsetFromRootBlock, |
| RenderObject* selObj, LayoutUnit logicalRight, LayoutUnit logicalTop, LayoutUnit logicalHeight, const PaintInfo*); |
| void getSelectionGapInfo(SelectionState, bool& leftGap, bool& rightGap); |
| LayoutRect logicalRectToPhysicalRect(const LayoutPoint& physicalPosition, const LayoutRect& logicalRect); |
| |
| // Helper methods for computing line counts and heights for line counts. |
| RootInlineBox* lineAtIndex(int); |
| int lineCount(); |
| int heightForLineCount(int); |
| void clearTruncation(); |
| |
| void adjustRectForColumns(LayoutRect&) const; |
| virtual void adjustForColumns(LayoutSize&, const LayoutPoint&) const; |
| void adjustForColumnRect(LayoutSize& offset, const LayoutPoint& pointInContainer) 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 TextRun constructTextRun(RenderObject* context, const Font&, const String&, RenderStyle*, |
| TextRun::ExpansionBehavior = TextRun::AllowTrailingExpansion | TextRun::ForbidLeadingExpansion, TextRunFlags = DefaultTextRunFlags); |
| |
| static TextRun constructTextRun(RenderObject* context, const Font&, const UChar*, int length, RenderStyle*, |
| TextRun::ExpansionBehavior = TextRun::AllowTrailingExpansion | TextRun::ForbidLeadingExpansion, TextRunFlags = DefaultTextRunFlags); |
| |
| 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; |
| LayoutRect columnRectAt(ColumnInfo*, unsigned) const; |
| |
| LayoutUnit paginationStrut() const { return m_rareData ? m_rareData->m_paginationStrut : 0; } |
| void setPaginationStrut(LayoutUnit); |
| |
| // 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 }; |
| LayoutUnit logicalWidthForChild(const RenderBox* child) { return isHorizontalWritingMode() ? child->width() : child->height(); } |
| LayoutUnit logicalHeightForChild(const RenderBox* child) { return isHorizontalWritingMode() ? child->height() : child->width(); } |
| LayoutUnit logicalTopForChild(const RenderBox* child) { return isHorizontalWritingMode() ? child->y() : child->x(); } |
| LayoutUnit logicalLeftForChild(const RenderBox* child) { return isHorizontalWritingMode() ? child->x() : child->y(); } |
| void setLogicalLeftForChild(RenderBox* child, LayoutUnit logicalLeft, ApplyLayoutDeltaMode = DoNotApplyLayoutDelta); |
| void setLogicalTopForChild(RenderBox* child, LayoutUnit logicalTop, ApplyLayoutDeltaMode = DoNotApplyLayoutDelta); |
| LayoutUnit marginBeforeForChild(const RenderBoxModelObject* child) const; |
| LayoutUnit marginAfterForChild(const RenderBoxModelObject* child) const; |
| LayoutUnit marginStartForChild(const RenderBoxModelObject* child) const; |
| LayoutUnit marginEndForChild(const RenderBoxModelObject* child) const; |
| LayoutUnit marginLogicalLeftForChild(const RenderBoxModelObject* child) const; |
| LayoutUnit marginLogicalRightForChild(const RenderBoxModelObject* child) const; |
| void setMarginStartForChild(RenderBox* child, LayoutUnit); |
| void setMarginEndForChild(RenderBox* child, LayoutUnit); |
| void setMarginBeforeForChild(RenderBox* child, LayoutUnit); |
| void setMarginAfterForChild(RenderBox* child, LayoutUnit); |
| LayoutUnit collapsedMarginBeforeForChild(const RenderBox* child) const; |
| LayoutUnit collapsedMarginAfterForChild(const RenderBox* child) const; |
| |
| void updateLogicalWidthForAlignment(const ETextAlign&, BidiRun* trailingSpaceRun, float& logicalLeft, float& totalLogicalWidth, float& availableLogicalWidth, int expansionOpportunityCount); |
| |
| virtual void updateFirstLetter(); |
| |
| class MarginValues { |
| public: |
| MarginValues(LayoutUnit beforePos, LayoutUnit beforeNeg, LayoutUnit afterPos, LayoutUnit afterNeg) |
| : m_positiveMarginBefore(beforePos) |
| , m_negativeMarginBefore(beforeNeg) |
| , m_positiveMarginAfter(afterPos) |
| , m_negativeMarginAfter(afterNeg) |
| { } |
| |
| LayoutUnit positiveMarginBefore() const { return m_positiveMarginBefore; } |
| LayoutUnit negativeMarginBefore() const { return m_negativeMarginBefore; } |
| LayoutUnit positiveMarginAfter() const { return m_positiveMarginAfter; } |
| LayoutUnit negativeMarginAfter() const { return m_negativeMarginAfter; } |
| |
| void setPositiveMarginBefore(LayoutUnit pos) { m_positiveMarginBefore = pos; } |
| void setNegativeMarginBefore(LayoutUnit neg) { m_negativeMarginBefore = neg; } |
| void setPositiveMarginAfter(LayoutUnit pos) { m_positiveMarginAfter = pos; } |
| void setNegativeMarginAfter(LayoutUnit neg) { m_negativeMarginAfter = neg; } |
| |
| private: |
| LayoutUnit m_positiveMarginBefore; |
| LayoutUnit m_negativeMarginBefore; |
| LayoutUnit m_positiveMarginAfter; |
| LayoutUnit m_negativeMarginAfter; |
| }; |
| MarginValues marginValuesForChild(RenderBox* child); |
| |
| virtual void scrollbarsChanged(bool /*horizontalScrollbarChanged*/, bool /*verticalScrollbarChanged*/) { }; |
| |
| LayoutUnit logicalLeftOffsetForContent(RenderRegion*, LayoutUnit offsetFromLogicalTopOfFirstPage) const; |
| LayoutUnit logicalRightOffsetForContent(RenderRegion*, LayoutUnit offsetFromLogicalTopOfFirstPage) const; |
| LayoutUnit availableLogicalWidthForContent(RenderRegion* region, LayoutUnit offsetFromLogicalTopOfFirstPage) const |
| { |
| return max<LayoutUnit>(0, logicalRightOffsetForContent(region, offsetFromLogicalTopOfFirstPage) - |
| logicalLeftOffsetForContent(region, offsetFromLogicalTopOfFirstPage)); } |
| LayoutUnit startOffsetForContent(RenderRegion* region, LayoutUnit offsetFromLogicalTopOfFirstPage) const |
| { |
| return style()->isLeftToRightDirection() ? logicalLeftOffsetForContent(region, offsetFromLogicalTopOfFirstPage) |
| : logicalWidth() - logicalRightOffsetForContent(region, offsetFromLogicalTopOfFirstPage); |
| } |
| LayoutUnit logicalLeftOffsetForContent(LayoutUnit blockOffset) const |
| { |
| return logicalLeftOffsetForContent(regionAtBlockOffset(blockOffset), offsetFromLogicalTopOfFirstPage()); |
| } |
| LayoutUnit logicalRightOffsetForContent(LayoutUnit blockOffset) const |
| { |
| return logicalRightOffsetForContent(regionAtBlockOffset(blockOffset), offsetFromLogicalTopOfFirstPage()); |
| } |
| LayoutUnit availableLogicalWidthForContent(LayoutUnit blockOffset) const |
| { |
| return availableLogicalWidthForContent(regionAtBlockOffset(blockOffset), offsetFromLogicalTopOfFirstPage()); |
| } |
| LayoutUnit startOffsetForContent(LayoutUnit blockOffset) const |
| { |
| return startOffsetForContent(regionAtBlockOffset(blockOffset), offsetFromLogicalTopOfFirstPage()); |
| } |
| LayoutUnit logicalLeftOffsetForContent() const { return isHorizontalWritingMode() ? borderLeft() + paddingLeft() : borderTop() + paddingTop(); } |
| LayoutUnit logicalRightOffsetForContent() const { return logicalLeftOffsetForContent() + availableLogicalWidth(); } |
| LayoutUnit startOffsetForContent() const { return style()->isLeftToRightDirection() ? logicalLeftOffsetForContent() : logicalWidth() - logicalRightOffsetForContent(); } |
| |
| void setStaticInlinePositionForChild(RenderBox*, LayoutUnit blockOffset, LayoutUnit inlinePosition); |
| |
| LayoutUnit computeStartPositionDeltaForChildAvoidingFloats(const RenderBox* child, LayoutUnit childMarginStart, |
| LayoutUnit childLogicalWidth, RenderRegion* = 0, LayoutUnit offsetFromLogicalTopOfFirstPage = 0); |
| |
| #ifndef NDEBUG |
| void showLineTreeAndMark(const InlineBox* = 0, const char* = 0, const InlineBox* = 0, const char* = 0, const RenderObject* = 0) const; |
| #endif |
| |
| protected: |
| virtual void willBeDestroyed(); |
| |
| // 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); |
| |
| LayoutUnit maxPositiveMarginBefore() const { return m_rareData ? m_rareData->m_margins.positiveMarginBefore() : RenderBlockRareData::positiveMarginBeforeDefault(this); } |
| LayoutUnit maxNegativeMarginBefore() const { return m_rareData ? m_rareData->m_margins.negativeMarginBefore() : RenderBlockRareData::negativeMarginBeforeDefault(this); } |
| LayoutUnit maxPositiveMarginAfter() const { return m_rareData ? m_rareData->m_margins.positiveMarginAfter() : RenderBlockRareData::positiveMarginAfterDefault(this); } |
| LayoutUnit maxNegativeMarginAfter() const { return m_rareData ? m_rareData->m_margins.negativeMarginAfter() : RenderBlockRareData::negativeMarginAfterDefault(this); } |
| |
| void setMaxMarginBeforeValues(LayoutUnit pos, LayoutUnit neg); |
| void setMaxMarginAfterValues(LayoutUnit pos, LayoutUnit 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(); |
| |
| bool layoutPositionedObjects(bool relayoutChildren); |
| |
| virtual void paint(PaintInfo&, const LayoutPoint&); |
| virtual void paintObject(PaintInfo&, const LayoutPoint&); |
| |
| LayoutUnit logicalRightOffsetForLine(LayoutUnit position, LayoutUnit fixedOffset, bool applyTextIndent, LayoutUnit* logicalHeightRemaining = 0) const; |
| LayoutUnit logicalLeftOffsetForLine(LayoutUnit position, LayoutUnit fixedOffset, bool applyTextIndent, LayoutUnit* 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&, const LayoutPoint& pointInContainer, const LayoutPoint& accumulatedOffset, HitTestAction); |
| |
| virtual void computePreferredLogicalWidths(); |
| |
| virtual LayoutUnit firstLineBoxBaseline() const; |
| virtual LayoutUnit lastLineBoxBaseline() const; |
| |
| virtual void updateHitTestResult(HitTestResult&, const LayoutPoint&); |
| |
| // 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 setDesiredColumnCountAndWidth(int, LayoutUnit); |
| |
| void computeOverflow(LayoutUnit oldClientAfterEdge, bool recomputeFloats = false); |
| virtual void addOverflowFromChildren(); |
| void addOverflowFromFloats(); |
| void addOverflowFromPositionedObjects(); |
| void addOverflowFromBlockChildren(); |
| void addOverflowFromInlineChildren(); |
| |
| virtual void addFocusRingRects(Vector<LayoutRect>&, const LayoutPoint&); |
| |
| #if ENABLE(SVG) |
| // Only used by RenderSVGText, which explicitely overrides RenderBlock::layoutBlock(), do NOT use for anything else. |
| void forceLayoutInlineChildren() |
| { |
| LayoutUnit repaintLogicalTop = 0; |
| LayoutUnit 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 LayoutUnit collapsedMarginBefore() const { return maxPositiveMarginBefore() - maxNegativeMarginBefore(); } |
| virtual LayoutUnit collapsedMarginAfter() const { return maxPositiveMarginAfter() - maxNegativeMarginAfter(); } |
| |
| virtual void repaintOverhangingFloats(bool paintAllDescendants); |
| |
| void layoutBlockChildren(bool relayoutChildren, LayoutUnit& maxFloatLogicalBottom); |
| void layoutInlineChildren(bool relayoutChildren, LayoutUnit& repaintLogicalTop, LayoutUnit& repaintLogicalBottom); |
| BidiRun* handleTrailingSpaces(BidiRunList<BidiRun>&, BidiContext*); |
| |
| virtual void borderFitAdjust(LayoutRect&) 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(LayoutRect(f->x() - f->marginLeft(), f->y() - f->marginTop(), f->width() + f->marginLeft() + f->marginRight(), f->height() + f->marginTop() + f->marginBottom())) |
| , everHadLayout(f->everHadLayout()) |
| { |
| } |
| |
| RenderBox* object; |
| LayoutRect rect; |
| bool everHadLayout; |
| }; |
| |
| struct FloatingObject { |
| WTF_MAKE_NONCOPYABLE(FloatingObject); WTF_MAKE_FAST_ALLOCATED; |
| public: |
| // FloatLeftRight is a mask to query for both left and right but not positioned. |
| // FloatAll is a mask to query for all types of floats. |
| enum Type { FloatLeft = 1, FloatRight = 2, FloatLeftRight = 3, FloatPositioned = 4, FloatAll = 7 }; |
| |
| FloatingObject(EFloat type) |
| : m_renderer(0) |
| , m_originatingLine(0) |
| , m_paginationStrut(0) |
| , m_shouldPaint(false) |
| , m_isDescendant(false) |
| , m_isPlaced(false) |
| #ifndef NDEBUG |
| , m_isInPlacedTree(false) |
| #endif |
| { |
| ASSERT(type != NoFloat); |
| if (type == LeftFloat) |
| m_type = FloatLeft; |
| else if (type == RightFloat) |
| m_type = FloatRight; |
| else if (type == PositionedFloat) |
| m_type = FloatPositioned; |
| } |
| |
| FloatingObject(Type type, const LayoutRect& frameRect) |
| : m_renderer(0) |
| , m_originatingLine(0) |
| , m_frameRect(frameRect) |
| , m_paginationStrut(0) |
| , m_type(type) |
| , m_shouldPaint(type != FloatPositioned) |
| , m_isDescendant(false) |
| , m_isPlaced(true) |
| #ifndef NDEBUG |
| , m_isInPlacedTree(false) |
| #endif |
| { |
| } |
| |
| 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; } |
| |
| LayoutUnit x() const { ASSERT(isPlaced()); return m_frameRect.x(); } |
| LayoutUnit maxX() const { ASSERT(isPlaced()); return m_frameRect.maxX(); } |
| LayoutUnit y() const { ASSERT(isPlaced()); return m_frameRect.y(); } |
| LayoutUnit maxY() const { ASSERT(isPlaced()); return m_frameRect.maxY(); } |
| LayoutUnit width() const { return m_frameRect.width(); } |
| LayoutUnit height() const { return m_frameRect.height(); } |
| |
| void setX(LayoutUnit x) { ASSERT(!isInPlacedTree()); m_frameRect.setX(x); } |
| void setY(LayoutUnit y) { ASSERT(!isInPlacedTree()); m_frameRect.setY(y); } |
| void setWidth(LayoutUnit width) { ASSERT(!isInPlacedTree()); m_frameRect.setWidth(width); } |
| void setHeight(LayoutUnit height) { ASSERT(!isInPlacedTree()); m_frameRect.setHeight(height); } |
| |
| const LayoutRect& frameRect() const { ASSERT(isPlaced()); return m_frameRect; } |
| void setFrameRect(const LayoutRect& frameRect) { ASSERT(!isInPlacedTree()); m_frameRect = frameRect; } |
| |
| #ifndef NDEBUG |
| bool isInPlacedTree() const { return m_isInPlacedTree; } |
| void setIsInPlacedTree(bool value) { m_isInPlacedTree = value; } |
| #endif |
| |
| RenderBox* m_renderer; |
| RootInlineBox* m_originatingLine; |
| LayoutRect m_frameRect; |
| int m_paginationStrut; |
| unsigned m_type : 3; // Type (left/right aligned or positioned) |
| bool m_shouldPaint : 1; |
| bool m_isDescendant : 1; |
| bool m_isPlaced : 1; |
| #ifndef NDEBUG |
| bool m_isInPlacedTree : 1; |
| #endif |
| }; |
| |
| LayoutPoint flipFloatForWritingModeForChild(const FloatingObject*, const LayoutPoint&) const; |
| |
| LayoutUnit logicalTopForFloat(const FloatingObject* child) const { return isHorizontalWritingMode() ? child->y() : child->x(); } |
| LayoutUnit logicalBottomForFloat(const FloatingObject* child) const { return isHorizontalWritingMode() ? child->maxY() : child->maxX(); } |
| LayoutUnit logicalLeftForFloat(const FloatingObject* child) const { return isHorizontalWritingMode() ? child->x() : child->y(); } |
| LayoutUnit logicalRightForFloat(const FloatingObject* child) const { return isHorizontalWritingMode() ? child->maxX() : child->maxY(); } |
| LayoutUnit logicalWidthForFloat(const FloatingObject* child) const { return isHorizontalWritingMode() ? child->width() : child->height(); } |
| |
| void setLogicalTopForFloat(FloatingObject* child, LayoutUnit logicalTop) |
| { |
| if (isHorizontalWritingMode()) |
| child->setY(logicalTop); |
| else |
| child->setX(logicalTop); |
| } |
| void setLogicalLeftForFloat(FloatingObject* child, LayoutUnit logicalLeft) |
| { |
| if (isHorizontalWritingMode()) |
| child->setX(logicalLeft); |
| else |
| child->setY(logicalLeft); |
| } |
| void setLogicalHeightForFloat(FloatingObject* child, LayoutUnit logicalHeight) |
| { |
| if (isHorizontalWritingMode()) |
| child->setHeight(logicalHeight); |
| else |
| child->setWidth(logicalHeight); |
| } |
| void setLogicalWidthForFloat(FloatingObject* child, LayoutUnit logicalWidth) |
| { |
| if (isHorizontalWritingMode()) |
| child->setWidth(logicalWidth); |
| else |
| child->setHeight(logicalWidth); |
| } |
| |
| LayoutUnit xPositionForFloatIncludingMargin(const FloatingObject* child) const |
| { |
| if (isHorizontalWritingMode()) |
| return child->x() + child->renderer()->marginLeft(); |
| else |
| return child->x() + marginBeforeForChild(child->renderer()); |
| } |
| |
| LayoutUnit yPositionForFloatIncludingMargin(const FloatingObject* child) const |
| { |
| if (isHorizontalWritingMode()) |
| return child->y() + marginBeforeForChild(child->renderer()); |
| else |
| return child->y() + child->renderer()->marginTop(); |
| } |
| |
| LayoutPoint computeLogicalLocationForFloat(const FloatingObject*, LayoutUnit logicalTopOffset) const; |
| |
| // The following functions' implementations are in RenderBlockLineLayout.cpp. |
| typedef std::pair<RenderText*, LazyLineBreakIterator> LineBreakIteratorInfo; |
| class LineBreaker { |
| public: |
| LineBreaker(RenderBlock* block) |
| : m_block(block) |
| { |
| reset(); |
| } |
| |
| InlineIterator nextLineBreak(InlineBidiResolver&, LineInfo&, LineBreakIteratorInfo&, FloatingObject* lastFloatFromPreviousLine, unsigned consecutiveHyphenatedLines); |
| |
| bool lineWasHyphenated() { return m_hyphenated; } |
| const Vector<RenderBox*>& positionedObjects() { return m_positionedObjects; } |
| EClear clear() { return m_clear; } |
| private: |
| void reset(); |
| |
| void skipTrailingWhitespace(InlineIterator&, const LineInfo&); |
| void skipLeadingWhitespace(InlineBidiResolver&, LineInfo&, FloatingObject* lastFloatFromPreviousLine, LineWidth&); |
| |
| RenderBlock* m_block; |
| bool m_hyphenated; |
| EClear m_clear; |
| Vector<RenderBox*> m_positionedObjects; |
| }; |
| |
| void checkFloatsInCleanLine(RootInlineBox*, Vector<FloatWithRect>&, size_t& floatIndex, bool& encounteredNewFloat, bool& dirtiedByFloat); |
| RootInlineBox* determineStartPosition(LineLayoutState&, InlineBidiResolver&); |
| void determineEndPosition(LineLayoutState&, RootInlineBox* startBox, InlineIterator& cleanLineStart, BidiStatus& cleanLineBidiStatus); |
| bool matchedEndLine(LineLayoutState&, const InlineBidiResolver&, const InlineIterator& endLineStart, const BidiStatus& endLineStatus); |
| bool checkPaginationAndFloatsAtEndLine(LineLayoutState&); |
| |
| RootInlineBox* constructLine(BidiRunList<BidiRun>&, const LineInfo&); |
| InlineFlowBox* createLineBoxes(RenderObject*, const LineInfo&, InlineBox* childBox); |
| |
| void setMarginsForRubyRun(BidiRun*, RenderRubyRun*, RenderObject*, const LineInfo&); |
| |
| void computeInlineDirectionPositionsForLine(RootInlineBox*, const LineInfo&, 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, LineInfo&, LineWidth&); |
| void appendFloatingObjectToLastLine(FloatingObject*); |
| |
| // End of functions defined in RenderBlockLineLayout.cpp. |
| |
| void paintFloats(PaintInfo&, const LayoutPoint&, bool preservePhase = false); |
| void paintContents(PaintInfo&, const LayoutPoint&); |
| void paintColumnContents(PaintInfo&, const LayoutPoint&, bool paintFloats = false); |
| void paintColumnRules(PaintInfo&, const LayoutPoint&); |
| void paintChildren(PaintInfo&, const LayoutPoint&); |
| void paintEllipsisBoxes(PaintInfo&, const LayoutPoint&); |
| void paintSelection(PaintInfo&, const LayoutPoint&); |
| void paintCaret(PaintInfo&, const LayoutPoint&, 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(); |
| |
| bool hasPositionedFloats() const { return m_hasPositionedFloats; } |
| void addPositionedFloats(); |
| bool positionedFloatsNeedRelayout(); |
| |
| void clearFloats(BlockLayoutPass); |
| LayoutUnit getClearDelta(RenderBox* child, LayoutUnit yPos); |
| |
| virtual bool avoidsFloats() const; |
| |
| bool hasOverhangingFloats() { return parent() && !hasColumns() && containsFloats() && lowestFloatLogicalBottomIncludingPositionedFloats() > logicalHeight(); } |
| bool hasOverhangingFloat(RenderBox*); |
| void addIntrudingFloats(RenderBlock* prev, LayoutUnit xoffset, LayoutUnit yoffset); |
| LayoutUnit addOverhangingFloats(RenderBlock* child, bool makeChildPaintOtherFloats); |
| |
| LayoutUnit lowestFloatLogicalBottom() const { return lowestFloatLogicalBottom(FloatingObject::FloatLeftRight); } |
| LayoutUnit lowestFloatLogicalBottomIncludingPositionedFloats() const { return lowestFloatLogicalBottom(FloatingObject::FloatAll); } |
| LayoutUnit lowestFloatLogicalBottom(FloatingObject::Type) const; |
| LayoutUnit nextFloatLogicalBottomBelow(LayoutUnit) const; |
| |
| virtual bool hitTestColumns(const HitTestRequest&, HitTestResult&, const LayoutPoint& pointInContainer, const LayoutPoint& accumulatedOffset, HitTestAction); |
| virtual bool hitTestContents(const HitTestRequest&, HitTestResult&, const LayoutPoint& pointInContainer, const LayoutPoint& accumulatedOffset, HitTestAction); |
| bool hitTestFloats(const HitTestRequest&, HitTestResult&, const LayoutPoint& pointInContainer, const LayoutPoint& accumulatedOffset); |
| |
| virtual bool isPointInOverflowControl(HitTestResult&, const LayoutPoint& pointInContainer, const LayoutPoint& accumulatedOffset); |
| |
| 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 LayoutRect rectWithOutlineForRepaint(RenderBoxModelObject* repaintContainer, LayoutUnit outlineWidth) const; |
| virtual RenderStyle* outlineStyleForRepaint() const; |
| |
| virtual RenderObject* hoverAncestor() const; |
| virtual void updateDragState(bool dragOn); |
| virtual void childBecameNonInline(RenderObject* child); |
| |
| virtual LayoutRect selectionRectForRepaint(RenderBoxModelObject* repaintContainer, bool /*clipToVisibleContent*/) |
| { |
| return selectionGapRectsForRepaint(repaintContainer); |
| } |
| virtual bool shouldPaintSelectionGaps() const; |
| bool isSelectionRoot() const; |
| GapRects selectionGaps(RenderBlock* rootBlock, const LayoutPoint& rootBlockPhysicalPosition, const LayoutSize& offsetFromRootBlock, |
| LayoutUnit& lastLogicalTop, LayoutUnit& lastLogicalLeft, LayoutUnit& lastLogicalRight, const PaintInfo* = 0); |
| GapRects inlineSelectionGaps(RenderBlock* rootBlock, const LayoutPoint& rootBlockPhysicalPosition, const LayoutSize& offsetFromRootBlock, |
| LayoutUnit& lastLogicalTop, LayoutUnit& lastLogicalLeft, LayoutUnit& lastLogicalRight, const PaintInfo*); |
| GapRects blockSelectionGaps(RenderBlock* rootBlock, const LayoutPoint& rootBlockPhysicalPosition, const LayoutSize& offsetFromRootBlock, |
| LayoutUnit& lastLogicalTop, LayoutUnit& lastLogicalLeft, LayoutUnit& lastLogicalRight, const PaintInfo*); |
| LayoutRect blockSelectionGap(RenderBlock* rootBlock, const LayoutPoint& rootBlockPhysicalPosition, const LayoutSize& offsetFromRootBlock, |
| LayoutUnit lastLogicalTop, LayoutUnit lastLogicalLeft, LayoutUnit lastLogicalRight, LayoutUnit logicalBottom, const PaintInfo*); |
| LayoutUnit logicalLeftSelectionOffset(RenderBlock* rootBlock, LayoutUnit position); |
| LayoutUnit logicalRightSelectionOffset(RenderBlock* rootBlock, LayoutUnit position); |
| |
| virtual void absoluteRects(Vector<LayoutRect>&, const LayoutPoint& accumulatedOffset) const; |
| virtual void absoluteQuads(Vector<FloatQuad>&, bool* wasFixed) const; |
| |
| LayoutUnit desiredColumnWidth() const; |
| unsigned desiredColumnCount() const; |
| |
| void paintContinuationOutlines(PaintInfo&, const LayoutPoint&); |
| |
| virtual LayoutRect localCaretRect(InlineBox*, int caretOffset, LayoutUnit* extraWidthToEndOfLine = 0); |
| |
| void adjustPointToColumnContents(LayoutPoint&) const; |
| void adjustForBorderFit(LayoutUnit x, LayoutUnit& left, LayoutUnit& right) const; // Helper function for borderFitAdjust |
| |
| void markLinesDirtyInBlockRange(LayoutUnit logicalTop, LayoutUnit logicalBottom, RootInlineBox* highest = 0); |
| |
| void newLine(EClear); |
| |
| Position positionForBox(InlineBox*, bool start = true) const; |
| VisiblePosition positionForPointWithInlineChildren(const LayoutPoint&); |
| |
| // Adjust from painting offsets to the local coords of this renderer |
| void offsetForContents(LayoutPoint&) const; |
| |
| virtual void calcColumnWidth(); |
| bool layoutColumns(bool hasSpecifiedPageLogicalHeight, LayoutUnit 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. |
| LayoutUnit m_positiveMargin; |
| LayoutUnit m_negativeMargin; |
| |
| public: |
| MarginInfo(RenderBlock*, LayoutUnit beforeBorderPadding, LayoutUnit 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(LayoutUnit p) { m_positiveMargin = p; } |
| void setNegativeMargin(LayoutUnit n) { m_negativeMargin = n; } |
| void setPositiveMarginIfLarger(LayoutUnit p) |
| { |
| if (p > m_positiveMargin) |
| m_positiveMargin = p; |
| } |
| void setNegativeMarginIfLarger(LayoutUnit n) |
| { |
| if (n > m_negativeMargin) |
| m_negativeMargin = n; |
| } |
| |
| void setMargin(LayoutUnit p, LayoutUnit 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; } |
| LayoutUnit positiveMargin() const { return m_positiveMargin; } |
| LayoutUnit negativeMargin() const { return m_negativeMargin; } |
| LayoutUnit margin() const { return m_positiveMargin - m_negativeMargin; } |
| }; |
| |
| void layoutBlockChild(RenderBox* child, MarginInfo&, LayoutUnit& previousFloatLogicalBottom, LayoutUnit& 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); |
| LayoutUnit collapseMargins(RenderBox* child, MarginInfo&); |
| LayoutUnit clearFloatsIfNeeded(RenderBox* child, MarginInfo&, LayoutUnit oldTopPosMargin, LayoutUnit oldTopNegMargin, LayoutUnit yPos); |
| LayoutUnit estimateLogicalTopPosition(RenderBox* child, const MarginInfo&, LayoutUnit& estimateWithoutPagination); |
| void determineLogicalLeftPositionForChild(RenderBox* child); |
| void handleAfterSideOfBlock(LayoutUnit top, LayoutUnit bottom, MarginInfo&); |
| void setCollapsedBottomMargin(const MarginInfo&); |
| // End helper functions and structs used by layoutBlockChildren. |
| |
| // Helper function for layoutInlineChildren() |
| RootInlineBox* createLineBoxesFromBidiRuns(BidiRunList<BidiRun>&, const InlineIterator& end, LineInfo&, VerticalPositionCache&, BidiRun* trailingSpaceRun); |
| void layoutRunsAndFloats(LineLayoutState&, bool hasInlineChild); |
| void layoutRunsAndFloatsInRange(LineLayoutState&, InlineBidiResolver&, const InlineIterator& cleanLineStart, const BidiStatus& cleanLineBidiStatus, unsigned consecutiveHyphenatedLines); |
| void linkToEndLineIfNeeded(LineLayoutState&); |
| static void repaintDirtyFloats(Vector<FloatWithRect>& floats); |
| |
| protected: |
| // Pagination routines. |
| |
| // Returns the logicalOffset at the top of the next page. If the offset passed in is already at the top of the current page, |
| // then nextPageLogicalTop with ExcludePageBoundary will still move to the top of the next page. nextPageLogicalTop with |
| // IncludePageBoundary set will not. |
| // |
| // For a page height of 800px, the first rule will return 800 if the value passed in is 0. The second rule will simply return 0. |
| enum PageBoundaryRule { ExcludePageBoundary, IncludePageBoundary }; |
| LayoutUnit nextPageLogicalTop(LayoutUnit logicalOffset, PageBoundaryRule = ExcludePageBoundary) const; |
| bool hasNextPage(LayoutUnit logicalOffset, PageBoundaryRule = ExcludePageBoundary) const; |
| |
| LayoutUnit applyBeforeBreak(RenderBox* child, LayoutUnit logicalOffset); // If the child has a before break, then return a new yPos that shifts to the top of the next page/column. |
| LayoutUnit applyAfterBreak(RenderBox* child, LayoutUnit logicalOffset, MarginInfo&); // If the child has an after break, then return a new offset that shifts to the top of the next page/column. |
| |
| LayoutUnit pageLogicalHeightForOffset(LayoutUnit offset) const; |
| LayoutUnit pageRemainingLogicalHeightForOffset(LayoutUnit offset, PageBoundaryRule = IncludePageBoundary) const; |
| bool pushToNextPageWithMinimumLogicalHeight(LayoutUnit& adjustment, LayoutUnit logicalOffset, LayoutUnit minimumLogicalHeight) const; |
| |
| LayoutUnit adjustForUnsplittableChild(RenderBox* child, LayoutUnit 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*, LayoutUnit& 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. |
| LayoutUnit adjustBlockChildForPagination(LayoutUnit logicalTopAfterClear, LayoutUnit estimateWithoutPagination, RenderBox* child, bool atBeforeSideOfBlock); |
| |
| // This function is called to test a line box that has moved in the block direction to see if it has ended up in a new |
| // region/page/column that has a different available line width than the old one. Used to know when you have to dirty a |
| // line, i.e., that it can't be re-used. |
| bool lineWidthForPaginatedLineChanged(RootInlineBox*, LayoutUnit lineDelta = 0) const; |
| |
| bool logicalWidthChangedInRegions() const; |
| |
| virtual bool requiresColumns(int desiredColumnCount) const; |
| |
| public: |
| LayoutUnit offsetFromLogicalTopOfFirstPage() const; |
| RenderRegion* regionAtBlockOffset(LayoutUnit) const; |
| RenderRegion* clampToStartAndEndRegions(RenderRegion*) const; |
| |
| protected: |
| 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; |
| typedef PODInterval<int, FloatingObject*> FloatingObjectInterval; |
| typedef PODIntervalTree<int, FloatingObject*> FloatingObjectTree; |
| typedef PODFreeListArena<PODRedBlackTree<FloatingObjectInterval>::Node> IntervalArena; |
| |
| template <FloatingObject::Type FloatTypeValue> |
| class FloatIntervalSearchAdapter { |
| public: |
| typedef FloatingObjectInterval IntervalType; |
| |
| FloatIntervalSearchAdapter(const RenderBlock* renderer, int value, LayoutUnit& offset, LayoutUnit* heightRemaining) |
| : m_renderer(renderer) |
| , m_value(value) |
| , m_offset(offset) |
| , m_heightRemaining(heightRemaining) |
| { |
| } |
| |
| inline int lowValue() const { return m_value; } |
| inline int highValue() const { return m_value; } |
| void collectIfNeeded(const IntervalType&) const; |
| |
| private: |
| const RenderBlock* m_renderer; |
| int m_value; |
| LayoutUnit& m_offset; |
| LayoutUnit* m_heightRemaining; |
| }; |
| |
| class FloatingObjects { |
| public: |
| FloatingObjects(const RenderBlock* renderer, bool horizontalWritingMode) |
| : m_placedFloatsTree(UninitializedTree) |
| , m_leftObjectsCount(0) |
| , m_rightObjectsCount(0) |
| , m_positionedObjectsCount(0) |
| , m_horizontalWritingMode(horizontalWritingMode) |
| , m_renderer(renderer) |
| { |
| } |
| |
| void clear(); |
| void add(FloatingObject*); |
| void remove(FloatingObject*); |
| void addPlacedObject(FloatingObject*); |
| void removePlacedObject(FloatingObject*); |
| void setHorizontalWritingMode(bool b = true) { m_horizontalWritingMode = b; } |
| |
| bool hasLeftObjects() const { return m_leftObjectsCount > 0; } |
| bool hasRightObjects() const { return m_rightObjectsCount > 0; } |
| bool hasPositionedObjects() const { return m_positionedObjectsCount > 0; } |
| const FloatingObjectSet& set() const { return m_set; } |
| const FloatingObjectTree& placedFloatsTree() |
| { |
| computePlacedFloatsTreeIfNeeded(); |
| return m_placedFloatsTree; |
| } |
| private: |
| void computePlacedFloatsTree(); |
| inline void computePlacedFloatsTreeIfNeeded() |
| { |
| if (!m_placedFloatsTree.isInitialized()) |
| computePlacedFloatsTree(); |
| } |
| void increaseObjectsCount(FloatingObject::Type); |
| void decreaseObjectsCount(FloatingObject::Type); |
| FloatingObjectInterval intervalForFloatingObject(FloatingObject*); |
| |
| FloatingObjectSet m_set; |
| FloatingObjectTree m_placedFloatsTree; |
| unsigned m_leftObjectsCount; |
| unsigned m_rightObjectsCount; |
| unsigned m_positionedObjectsCount; |
| bool m_horizontalWritingMode; |
| const RenderBlock* m_renderer; |
| }; |
| 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 LayoutUnit positiveMarginBeforeDefault(const RenderBlock* block) |
| { |
| return std::max<LayoutUnit>(block->marginBefore(), 0); |
| } |
| |
| static LayoutUnit negativeMarginBeforeDefault(const RenderBlock* block) |
| { |
| return std::max<LayoutUnit>(-block->marginBefore(), 0); |
| } |
| static LayoutUnit positiveMarginAfterDefault(const RenderBlock* block) |
| { |
| return std::max<LayoutUnit>(block->marginAfter(), 0); |
| } |
| static LayoutUnit negativeMarginAfterDefault(const RenderBlock* block) |
| { |
| return std::max<LayoutUnit>(-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 signed m_lineHeight : 30; |
| bool m_beingDestroyed : 1; |
| bool m_hasPositionedFloats : 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*); |
| |
| #ifndef NDEBUG |
| // These structures are used by PODIntervalTree for debugging purposes. |
| template <> struct ValueToString<int> { |
| static String string(const int value); |
| }; |
| template<> struct ValueToString<RenderBlock::FloatingObject*> { |
| static String string(const RenderBlock::FloatingObject*); |
| }; |
| #endif |
| |
| } // namespace WebCore |
| |
| #endif // RenderBlock_h |
