| /* |
| * 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 "core/rendering/ColumnInfo.h" |
| #include "core/rendering/FloatingObjects.h" |
| #include "core/rendering/GapRects.h" |
| #include "core/rendering/RenderBox.h" |
| #include "core/rendering/RenderLineBoxList.h" |
| #include "core/rendering/RootInlineBox.h" |
| #include "core/rendering/shapes/ShapeInsideInfo.h" |
| #include "core/rendering/style/ShapeValue.h" |
| #include "platform/graphics/TextRun.h" |
| #include "platform/text/TextBreakIterator.h" |
| #include "wtf/ListHashSet.h" |
| #include "wtf/OwnPtr.h" |
| |
| namespace WebCore { |
| |
| class BasicShape; |
| class BidiContext; |
| class InlineIterator; |
| class LayoutStateMaintainer; |
| class LineLayoutState; |
| class RenderInline; |
| class RenderText; |
| |
| struct BidiRun; |
| struct PaintInfo; |
| class LineInfo; |
| class RenderRubyRun; |
| class TextLayout; |
| class WordMeasurement; |
| |
| 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; |
| typedef WTF::ListHashSet<RenderBox*, 16> TrackedRendererListHashSet; |
| typedef WTF::HashMap<const RenderBlock*, OwnPtr<TrackedRendererListHashSet> > TrackedDescendantsMap; |
| typedef WTF::HashMap<const RenderBox*, OwnPtr<HashSet<RenderBlock*> > > TrackedContainerMap; |
| typedef Vector<WordMeasurement, 64> WordMeasurements; |
| |
| enum CaretType { CursorCaret, DragCaret }; |
| enum ContainingBlockState { NewContainingBlock, SameContainingBlock }; |
| |
| enum TextRunFlag { |
| DefaultTextRunFlags = 0, |
| RespectDirection = 1 << 0, |
| RespectDirectionOverride = 1 << 1 |
| }; |
| |
| typedef unsigned TextRunFlags; |
| |
| class RenderBlock : public RenderBox { |
| public: |
| friend class LineLayoutState; |
| |
| protected: |
| explicit RenderBlock(ContainerNode*); |
| virtual ~RenderBlock(); |
| |
| public: |
| static RenderBlock* createAnonymous(Document*); |
| |
| RenderObject* firstChild() const { ASSERT(children() == virtualChildren()); return children()->firstChild(); } |
| RenderObject* lastChild() const { ASSERT(children() == virtualChildren()); return children()->lastChild(); } |
| |
| 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 OVERRIDE FINAL; |
| virtual int baselinePosition(FontBaseline, bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const; |
| |
| LayoutUnit minLineHeightForReplacedRenderer(bool isFirstLine, LayoutUnit replacedHeight) 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(); } |
| |
| // FIXME-BLOCKFLOW: Remove virtualizaion when all callers have moved to RenderBlockFlow |
| virtual void deleteLineBoxTree(); |
| |
| virtual void addChild(RenderObject* newChild, RenderObject* beforeChild = 0); |
| virtual void removeChild(RenderObject*); |
| |
| virtual void layoutBlock(bool relayoutChildren, LayoutUnit pageLogicalHeight = 0); |
| |
| void insertPositionedObject(RenderBox*); |
| static void removePositionedObject(RenderBox*); |
| void removePositionedObjects(RenderBlock*, ContainingBlockState = SameContainingBlock); |
| |
| TrackedRendererListHashSet* positionedObjects() const; |
| bool hasPositionedObjects() const |
| { |
| TrackedRendererListHashSet* objects = positionedObjects(); |
| return objects && !objects->isEmpty(); |
| } |
| |
| void addPercentHeightDescendant(RenderBox*); |
| static void removePercentHeightDescendant(RenderBox*); |
| TrackedRendererListHashSet* percentHeightDescendants() const; |
| static bool hasPercentHeightContainerMap(); |
| static bool hasPercentHeightDescendant(RenderBox*); |
| static void clearPercentHeightDescendantsFrom(RenderBox*); |
| static void removePercentHeightDescendantIfNeeded(RenderBox*); |
| |
| void setHasMarkupTruncation(bool b) { m_hasMarkupTruncation = b; } |
| bool hasMarkupTruncation() const { return m_hasMarkupTruncation; } |
| |
| void setHasMarginBeforeQuirk(bool b) { m_hasMarginBeforeQuirk = b; } |
| void setHasMarginAfterQuirk(bool b) { m_hasMarginAfterQuirk = b; } |
| |
| bool hasMarginBeforeQuirk() const { return m_hasMarginBeforeQuirk; } |
| bool hasMarginAfterQuirk() const { return m_hasMarginAfterQuirk; } |
| |
| bool hasMarginBeforeQuirk(const RenderBox* child) const; |
| bool hasMarginAfterQuirk(const RenderBox* child) const; |
| |
| RootInlineBox* createAndAppendRootInlineBox(); |
| |
| bool generatesLineBoxesForInlineChild(RenderObject*); |
| |
| void markShapeInsideDescendantsForLayout(); |
| void markPositionedObjectsForLayout(); |
| // FIXME: Do we really need this to be virtual? It's just so we can call this on |
| // RenderBoxes without needed to check whether they're RenderBlocks first. |
| virtual void markForPaginationRelayoutIfNeeded(SubtreeLayoutScope&) OVERRIDE FINAL; |
| |
| // FIXME-BLOCKFLOW: Remove virtualizaion when all of the line layout code has been moved out of RenderBlock |
| virtual bool containsFloats() const { return false; } |
| |
| // 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 shouldIndentText, RenderRegion* region, LayoutUnit logicalHeight = 0) const |
| { |
| return max<LayoutUnit>(0, logicalRightOffsetForLine(position, shouldIndentText, region, logicalHeight) |
| - logicalLeftOffsetForLine(position, shouldIndentText, region, logicalHeight)); |
| } |
| LayoutUnit logicalRightOffsetForLine(LayoutUnit position, bool shouldIndentText, RenderRegion* region, LayoutUnit logicalHeight = 0) const |
| { |
| return logicalRightOffsetForLine(position, logicalRightOffsetForContent(region), shouldIndentText, 0, logicalHeight); |
| } |
| LayoutUnit logicalLeftOffsetForLine(LayoutUnit position, bool shouldIndentText, RenderRegion* region, LayoutUnit logicalHeight = 0) const |
| { |
| return logicalLeftOffsetForLine(position, logicalLeftOffsetForContent(region), shouldIndentText, 0, logicalHeight); |
| } |
| LayoutUnit startOffsetForLine(LayoutUnit position, bool shouldIndentText, RenderRegion* region, LayoutUnit logicalHeight = 0) const |
| { |
| return style()->isLeftToRightDirection() ? logicalLeftOffsetForLine(position, shouldIndentText, region, logicalHeight) |
| : logicalWidth() - logicalRightOffsetForLine(position, shouldIndentText, region, logicalHeight); |
| } |
| LayoutUnit endOffsetForLine(LayoutUnit position, bool shouldIndentText, RenderRegion* region, LayoutUnit logicalHeight = 0) const |
| { |
| return !style()->isLeftToRightDirection() ? logicalLeftOffsetForLine(position, shouldIndentText, region, logicalHeight) |
| : logicalWidth() - logicalRightOffsetForLine(position, shouldIndentText, region, logicalHeight); |
| } |
| |
| LayoutUnit availableLogicalWidthForLine(LayoutUnit position, bool shouldIndentText, LayoutUnit logicalHeight = 0) const |
| { |
| return availableLogicalWidthForLine(position, shouldIndentText, regionAtBlockOffset(position), logicalHeight); |
| } |
| LayoutUnit logicalRightOffsetForLine(LayoutUnit position, bool shouldIndentText, LayoutUnit logicalHeight = 0) const |
| { |
| return logicalRightOffsetForLine(position, logicalRightOffsetForContent(position), shouldIndentText, 0, logicalHeight); |
| } |
| LayoutUnit logicalLeftOffsetForLine(LayoutUnit position, bool shouldIndentText, LayoutUnit logicalHeight = 0) const |
| { |
| return logicalLeftOffsetForLine(position, logicalLeftOffsetForContent(position), shouldIndentText, 0, logicalHeight); |
| } |
| LayoutUnit pixelSnappedLogicalLeftOffsetForLine(LayoutUnit position, bool shouldIndentText, LayoutUnit logicalHeight = 0) const |
| { |
| return roundToInt(logicalLeftOffsetForLine(position, shouldIndentText, logicalHeight)); |
| } |
| LayoutUnit pixelSnappedLogicalRightOffsetForLine(LayoutUnit position, bool shouldIndentText, LayoutUnit logicalHeight = 0) const |
| { |
| // FIXME: Multicolumn layouts break carrying over subpixel values to the logical right offset because the lines may be shifted |
| // by a subpixel value for all but the first column. This can lead to the actual pixel snapped width of the column being off |
| // by one pixel when rendered versus layed out, which can result in the line being clipped. For now, we have to floor. |
| // https://bugs.webkit.org/show_bug.cgi?id=105461 |
| return floorToInt(logicalRightOffsetForLine(position, shouldIndentText, logicalHeight)); |
| } |
| LayoutUnit startOffsetForLine(LayoutUnit position, bool shouldIndentText, LayoutUnit logicalHeight = 0) const |
| { |
| return style()->isLeftToRightDirection() ? logicalLeftOffsetForLine(position, shouldIndentText, logicalHeight) |
| : logicalWidth() - logicalRightOffsetForLine(position, shouldIndentText, logicalHeight); |
| } |
| LayoutUnit endOffsetForLine(LayoutUnit position, bool shouldIndentText, LayoutUnit logicalHeight = 0) const |
| { |
| return !style()->isLeftToRightDirection() ? logicalLeftOffsetForLine(position, shouldIndentText, logicalHeight) |
| : logicalWidth() - logicalRightOffsetForLine(position, shouldIndentText, logicalHeight); |
| } |
| |
| LayoutUnit startAlignedOffsetForLine(LayoutUnit position, bool shouldIndentText); |
| LayoutUnit textIndentOffset() const; |
| |
| virtual PositionWithAffinity positionForPoint(const LayoutPoint&) OVERRIDE; |
| |
| // Block flows subclass availableWidth to handle multi column layout (shrinking the width available to children when laying out.) |
| virtual LayoutUnit availableLogicalWidth() const OVERRIDE FINAL; |
| |
| 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()); } |
| |
| GapRects selectionGapRectsForRepaint(const RenderLayerModelObject* 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); |
| RenderBlock* blockBeforeWithinSelectionRoot(LayoutSize& offset) const; |
| |
| LayoutRect logicalRectToPhysicalRect(const LayoutPoint& physicalPosition, const LayoutRect& logicalRect); |
| |
| // Helper methods for computing line counts and heights for line counts. |
| RootInlineBox* lineAtIndex(int) const; |
| int lineCount(const RootInlineBox* = 0, bool* = 0) const; |
| int heightForLineCount(int); |
| void clearTruncation(); |
| |
| void adjustRectForColumns(LayoutRect&) const; |
| virtual void adjustForColumns(LayoutSize&, const LayoutPoint&) const OVERRIDE FINAL; |
| void adjustForColumnRect(LayoutSize& offset, const LayoutPoint& locationInContainer) const; |
| |
| void addContinuationWithOutline(RenderInline*); |
| bool paintsContinuationOutline(RenderInline*); |
| |
| virtual RenderBoxModelObject* virtualContinuation() const OVERRIDE FINAL { return continuation(); } |
| bool isAnonymousBlockContinuation() const { return continuation() && isAnonymousBlock(); } |
| RenderInline* inlineElementContinuation() const; |
| RenderBlock* blockElementContinuation() const; |
| |
| using RenderBoxModelObject::continuation; |
| using RenderBoxModelObject::setContinuation; |
| |
| static RenderBlock* createAnonymousWithParentRendererAndDisplay(const RenderObject*, EDisplay = BLOCK); |
| static RenderBlock* createAnonymousColumnsWithParentRenderer(const RenderObject*); |
| static RenderBlock* createAnonymousColumnSpanWithParentRenderer(const RenderObject*); |
| RenderBlock* createAnonymousBlock(EDisplay display = BLOCK) const { return createAnonymousWithParentRendererAndDisplay(this, display); } |
| RenderBlock* createAnonymousColumnsBlock() const { return createAnonymousColumnsWithParentRenderer(this); } |
| RenderBlock* createAnonymousColumnSpanBlock() const { return createAnonymousColumnSpanWithParentRenderer(this); } |
| |
| virtual RenderBox* createAnonymousBoxWithSameTypeAs(const RenderObject* parent) const OVERRIDE; |
| |
| ColumnInfo* columnInfo() const; |
| int columnGap() const; |
| |
| void updateColumnInfoFromStyle(RenderStyle*); |
| |
| // 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 : LayoutUnit(); } |
| void setPaginationStrut(LayoutUnit); |
| |
| bool shouldBreakAtLineToAvoidWidow() const { return m_rareData && m_rareData->m_lineBreakToAvoidWidow >= 0; } |
| void clearShouldBreakAtLineToAvoidWidow() const; |
| int lineBreakToAvoidWidow() const { return m_rareData ? m_rareData->m_lineBreakToAvoidWidow : -1; } |
| void setBreakAtLineToAvoidWidow(int); |
| void clearDidBreakAtLineToAvoidWidow(); |
| void setDidBreakAtLineToAvoidWidow(); |
| bool didBreakAtLineToAvoidWidow() const { return m_rareData && m_rareData->m_didBreakAtLineToAvoidWidow; } |
| |
| // 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). |
| LayoutUnit pageLogicalOffset() const { return m_rareData ? m_rareData->m_pageLogicalOffset : LayoutUnit(); } |
| void setPageLogicalOffset(LayoutUnit); |
| |
| RootInlineBox* lineGridBox() const { return m_rareData ? m_rareData->m_lineGridBox : 0; } |
| void setLineGridBox(RootInlineBox* box) |
| { |
| if (!m_rareData) |
| m_rareData = adoptPtr(new RenderBlockRareData()); |
| if (m_rareData->m_lineGridBox) |
| m_rareData->m_lineGridBox->destroy(); |
| m_rareData->m_lineGridBox = box; |
| } |
| void layoutLineGridBox(); |
| |
| // Accessors for logical width/height and margins in the containing block's block-flow direction. |
| enum ApplyLayoutDeltaMode { ApplyLayoutDelta, DoNotApplyLayoutDelta }; |
| LayoutUnit logicalWidthForChild(const RenderBox* child) const { return isHorizontalWritingMode() ? child->width() : child->height(); } |
| LayoutUnit logicalHeightForChild(const RenderBox* child) const { return isHorizontalWritingMode() ? child->height() : child->width(); } |
| LayoutUnit logicalTopForChild(const RenderBox* child) const { return isHorizontalWritingMode() ? child->y() : child->x(); } |
| void setLogicalLeftForChild(RenderBox* child, LayoutUnit logicalLeft, ApplyLayoutDeltaMode = DoNotApplyLayoutDelta); |
| void setLogicalTopForChild(RenderBox* child, LayoutUnit logicalTop, ApplyLayoutDeltaMode = DoNotApplyLayoutDelta); |
| LayoutUnit marginBeforeForChild(const RenderBoxModelObject* child) const { return child->marginBefore(style()); } |
| LayoutUnit marginAfterForChild(const RenderBoxModelObject* child) const { return child->marginAfter(style()); } |
| LayoutUnit marginStartForChild(const RenderBoxModelObject* child) const { return child->marginStart(style()); } |
| LayoutUnit marginEndForChild(const RenderBoxModelObject* child) const { return child->marginEnd(style()); } |
| void setMarginStartForChild(RenderBox* child, LayoutUnit value) const { child->setMarginStart(value, style()); } |
| void setMarginEndForChild(RenderBox* child, LayoutUnit value) const { child->setMarginEnd(value, style()); } |
| void setMarginBeforeForChild(RenderBox* child, LayoutUnit value) const { child->setMarginBefore(value, style()); } |
| void setMarginAfterForChild(RenderBox* child, LayoutUnit value) const { child->setMarginAfter(value, style()); } |
| LayoutUnit collapsedMarginBeforeForChild(const RenderBox* child) const; |
| LayoutUnit collapsedMarginAfterForChild(const RenderBox* child) const; |
| |
| void updateLogicalWidthForAlignment(const ETextAlign&, const RootInlineBox*, BidiRun* trailingSpaceRun, float& logicalLeft, float& totalLogicalWidth, float& availableLogicalWidth, int expansionOpportunityCount); |
| |
| virtual void updateFirstLetter(); |
| |
| virtual void scrollbarsChanged(bool /*horizontalScrollbarChanged*/, bool /*verticalScrollbarChanged*/) { }; |
| |
| LayoutUnit logicalLeftOffsetForContent(RenderRegion*) const; |
| LayoutUnit logicalRightOffsetForContent(RenderRegion*) const; |
| LayoutUnit availableLogicalWidthForContent(RenderRegion* region) const |
| { |
| return max<LayoutUnit>(0, logicalRightOffsetForContent(region) - logicalLeftOffsetForContent(region)); } |
| LayoutUnit startOffsetForContent(RenderRegion* region) const |
| { |
| return style()->isLeftToRightDirection() ? logicalLeftOffsetForContent(region) : logicalWidth() - logicalRightOffsetForContent(region); |
| } |
| LayoutUnit endOffsetForContent(RenderRegion* region) const |
| { |
| return !style()->isLeftToRightDirection() ? logicalLeftOffsetForContent(region) : logicalWidth() - logicalRightOffsetForContent(region); |
| } |
| LayoutUnit logicalLeftOffsetForContent(LayoutUnit blockOffset) const |
| { |
| return logicalLeftOffsetForContent(regionAtBlockOffset(blockOffset)); |
| } |
| LayoutUnit logicalRightOffsetForContent(LayoutUnit blockOffset) const |
| { |
| return logicalRightOffsetForContent(regionAtBlockOffset(blockOffset)); |
| } |
| LayoutUnit availableLogicalWidthForContent(LayoutUnit blockOffset) const |
| { |
| return availableLogicalWidthForContent(regionAtBlockOffset(blockOffset)); |
| } |
| LayoutUnit startOffsetForContent(LayoutUnit blockOffset) const |
| { |
| return startOffsetForContent(regionAtBlockOffset(blockOffset)); |
| } |
| LayoutUnit endOffsetForContent(LayoutUnit blockOffset) const |
| { |
| return endOffsetForContent(regionAtBlockOffset(blockOffset)); |
| } |
| LayoutUnit logicalLeftOffsetForContent() const { return isHorizontalWritingMode() ? borderLeft() + paddingLeft() : borderTop() + paddingTop(); } |
| LayoutUnit logicalRightOffsetForContent() const { return logicalLeftOffsetForContent() + availableLogicalWidth(); } |
| LayoutUnit startOffsetForContent() const { return style()->isLeftToRightDirection() ? logicalLeftOffsetForContent() : logicalWidth() - logicalRightOffsetForContent(); } |
| LayoutUnit endOffsetForContent() const { return !style()->isLeftToRightDirection() ? logicalLeftOffsetForContent() : logicalWidth() - logicalRightOffsetForContent(); } |
| |
| void setStaticInlinePositionForChild(RenderBox*, LayoutUnit blockOffset, LayoutUnit inlinePosition); |
| void updateStaticInlinePositionForChild(RenderBox*, LayoutUnit logicalTop); |
| |
| LayoutUnit computeStartPositionDeltaForChildAvoidingFloats(const RenderBox* child, LayoutUnit childMarginStart, RenderRegion* = 0); |
| |
| #ifndef NDEBUG |
| void checkPositionedObjectsNeedLayout(); |
| void showLineTreeAndMark(const InlineBox* = 0, const char* = 0, const InlineBox* = 0, const char* = 0, const RenderObject* = 0) const; |
| #endif |
| |
| ShapeInsideInfo* ensureShapeInsideInfo() |
| { |
| if (!m_rareData || !m_rareData->m_shapeInsideInfo) |
| setShapeInsideInfo(ShapeInsideInfo::createInfo(this)); |
| return m_rareData->m_shapeInsideInfo.get(); |
| } |
| ShapeInsideInfo* shapeInsideInfo() const |
| { |
| return m_rareData && m_rareData->m_shapeInsideInfo && ShapeInsideInfo::isEnabledFor(this) ? m_rareData->m_shapeInsideInfo.get() : 0; |
| } |
| void setShapeInsideInfo(PassOwnPtr<ShapeInsideInfo> value) |
| { |
| if (!m_rareData) |
| m_rareData = adoptPtr(new RenderBlockRareData()); |
| m_rareData->m_shapeInsideInfo = value; |
| } |
| ShapeInsideInfo* layoutShapeInsideInfo() const; |
| bool allowsShapeInsideInfoSharing() const { return !isInline() && !isFloating(); } |
| LayoutSize logicalOffsetFromShapeAncestorContainer(const RenderBlock* container) const; |
| virtual void imageChanged(WrappedImagePtr, const IntRect* = 0) OVERRIDE; |
| |
| // inline-block elements paint all phases atomically. This function ensures that. Certain other elements |
| // (grid items, flex items) require this behavior as well, and this function exists as a helper for them. |
| // It is expected that the caller will call this function independent of the value of paintInfo.phase. |
| static void paintAsInlineBlock(RenderObject*, PaintInfo&, const LayoutPoint&); |
| protected: |
| virtual void willBeDestroyed(); |
| |
| void dirtyForLayoutFromPercentageHeightDescendants(SubtreeLayoutScope&); |
| |
| virtual void layout(); |
| |
| void layoutPositionedObjects(bool relayoutChildren, bool fixedPositionObjectsOnly = false); |
| void markFixedPositionObjectForLayoutIfNeeded(RenderObject* child, SubtreeLayoutScope&); |
| |
| LayoutUnit marginIntrinsicLogicalWidthForChild(RenderBox* child) const; |
| |
| virtual bool supportsPartialLayout() const OVERRIDE { return true; }; |
| |
| virtual void paint(PaintInfo&, const LayoutPoint&); |
| virtual void paintObject(PaintInfo&, const LayoutPoint&); |
| virtual void paintChildren(PaintInfo&, const LayoutPoint&); |
| void paintChild(RenderBox*, PaintInfo&, const LayoutPoint&); |
| void paintChildAsInlineBlock(RenderBox*, PaintInfo&, const LayoutPoint&); |
| |
| LayoutUnit logicalRightOffsetForLine(LayoutUnit logicalTop, LayoutUnit fixedOffset, bool applyTextIndent, LayoutUnit* heightRemaining = 0, LayoutUnit logicalHeight = 0) const |
| { |
| return adjustLogicalRightOffsetForLine(logicalRightFloatOffsetForLine(logicalTop, fixedOffset, heightRemaining, logicalHeight, ShapeOutsideFloatShapeOffset), applyTextIndent); |
| } |
| LayoutUnit logicalLeftOffsetForLine(LayoutUnit logicalTop, LayoutUnit fixedOffset, bool applyTextIndent, LayoutUnit* heightRemaining = 0, LayoutUnit logicalHeight = 0) const |
| { |
| return adjustLogicalLeftOffsetForLine(logicalLeftFloatOffsetForLine(logicalTop, fixedOffset, heightRemaining, logicalHeight, ShapeOutsideFloatShapeOffset), applyTextIndent); |
| } |
| LayoutUnit logicalRightOffsetForLineIgnoringShapeOutside(LayoutUnit logicalTop, LayoutUnit fixedOffset, bool applyTextIndent, LayoutUnit* heightRemaining = 0, LayoutUnit logicalHeight = 0) const |
| { |
| return adjustLogicalRightOffsetForLine(logicalRightFloatOffsetForLine(logicalTop, fixedOffset, heightRemaining, logicalHeight, ShapeOutsideFloatMarginBoxOffset), applyTextIndent); |
| } |
| LayoutUnit logicalLeftOffsetForLineIgnoringShapeOutside(LayoutUnit logicalTop, LayoutUnit fixedOffset, bool applyTextIndent, LayoutUnit* heightRemaining = 0, LayoutUnit logicalHeight = 0) const |
| { |
| return adjustLogicalLeftOffsetForLine(logicalLeftFloatOffsetForLine(logicalTop, fixedOffset, heightRemaining, logicalHeight, ShapeOutsideFloatMarginBoxOffset), applyTextIndent); |
| } |
| |
| virtual ETextAlign textAlignmentForLine(bool endsWithSoftBreak) const; |
| virtual void adjustInlineDirectionLineBounds(int /* expansionOpportunityCount */, float& /* logicalLeft */, float& /* logicalWidth */) const { } |
| |
| virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction) OVERRIDE; |
| |
| virtual void computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const OVERRIDE; |
| virtual void computePreferredLogicalWidths() OVERRIDE; |
| void adjustIntrinsicLogicalWidthsForColumns(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const; |
| |
| virtual int firstLineBoxBaseline() const; |
| virtual int inlineBlockBaseline(LineDirectionMode) const OVERRIDE; |
| int lastLineBoxBaseline(LineDirectionMode) 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(); |
| |
| void updateScrollInfoAfterLayout(); |
| |
| virtual void styleWillChange(StyleDifference, const RenderStyle* newStyle); |
| virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle); |
| |
| virtual bool hasLineIfEmpty() const; |
| |
| bool simplifiedLayout(); |
| virtual void simplifiedNormalFlowLayout(); |
| |
| void setDesiredColumnCountAndWidth(int, LayoutUnit); |
| |
| public: |
| virtual void computeOverflow(LayoutUnit oldClientAfterEdge, bool = false); |
| protected: |
| virtual void addOverflowFromChildren(); |
| void addOverflowFromPositionedObjects(); |
| void addOverflowFromBlockChildren(); |
| void addOverflowFromInlineChildren(); |
| void addVisualOverflowFromTheme(); |
| |
| virtual void addFocusRingRects(Vector<IntRect>&, const LayoutPoint& additionalOffset, const RenderLayerModelObject* paintContainer = 0) OVERRIDE; |
| |
| virtual void computeSelfHitTestRects(Vector<LayoutRect>&, const LayoutPoint& layerOffset) const OVERRIDE; |
| |
| bool updateRegionsAndShapesLogicalSize(RenderFlowThread*); |
| void computeRegionRangeForBlock(RenderFlowThread*); |
| |
| void updateBlockChildDirtyBitsBeforeLayout(bool relayoutChildren, RenderBox*); |
| |
| virtual void checkForPaginationLogicalHeightChange(LayoutUnit& pageLogicalHeight, bool& pageLogicalHeightChanged, bool& hasSpecifiedPageLogicalHeight); |
| |
| virtual bool isInlineBlockOrInlineTable() const OVERRIDE FINAL { return isInline() && isReplaced(); } |
| |
| private: |
| // FIXME-BLOCKFLOW: Remove virtualizaion when all callers have moved to RenderBlockFlow |
| virtual LayoutUnit logicalRightFloatOffsetForLine(LayoutUnit, LayoutUnit fixedOffset, LayoutUnit*, LayoutUnit, ShapeOutsideFloatOffsetMode) const { return fixedOffset; } |
| // FIXME-BLOCKFLOW: Remove virtualizaion when all callers have moved to RenderBlockFlow |
| virtual LayoutUnit logicalLeftFloatOffsetForLine(LayoutUnit, LayoutUnit fixedOffset, LayoutUnit*, LayoutUnit, ShapeOutsideFloatOffsetMode) const { return fixedOffset; } |
| LayoutUnit adjustLogicalRightOffsetForLine(LayoutUnit offsetFromFloats, bool applyTextIndent) const; |
| LayoutUnit adjustLogicalLeftOffsetForLine(LayoutUnit offsetFromFloats, bool applyTextIndent) const; |
| |
| void computeShapeSize(); |
| void updateRegionsAndShapesAfterChildLayout(RenderFlowThread*, bool); |
| void updateShapeInsideInfoAfterStyleChange(const ShapeValue*, const ShapeValue* oldShape); |
| void relayoutShapeDescendantIfMoved(RenderBlock* child, LayoutSize offset); |
| |
| virtual RenderObjectChildList* virtualChildren() OVERRIDE FINAL { return children(); } |
| virtual const RenderObjectChildList* virtualChildren() const OVERRIDE FINAL { return children(); } |
| |
| virtual const char* renderName() const; |
| |
| virtual bool isRenderBlock() const OVERRIDE FINAL { return true; } |
| |
| void makeChildrenNonInline(RenderObject* insertionPoint = 0); |
| virtual void removeLeftoverAnonymousBlock(RenderBlock* child); |
| |
| static void collapseAnonymousBlockChild(RenderBlock* parent, RenderBlock* child); |
| // FIXME-BLOCKFLOW: Remove virtualizaion when all callers have moved to RenderBlockFlow |
| virtual void moveAllChildrenIncludingFloatsTo(RenderBlock* toBlock, bool fullRemoveInsert) { moveAllChildrenTo(toBlock, fullRemoveInsert); } |
| |
| virtual void dirtyLinesFromChangedChild(RenderObject* child) OVERRIDE FINAL { m_lineBoxes.dirtyLinesFromChangedChild(this, child); } |
| |
| void addChildToContinuation(RenderObject* newChild, RenderObject* beforeChild); |
| void addChildIgnoringContinuation(RenderObject* newChild, RenderObject* beforeChild); |
| void addChildToAnonymousColumnBlocks(RenderObject* newChild, RenderObject* beforeChild); |
| |
| void addChildIgnoringAnonymousColumnBlocks(RenderObject* newChild, RenderObject* beforeChild = 0); |
| |
| virtual bool isSelfCollapsingBlock() const OVERRIDE FINAL; |
| |
| void insertIntoTrackedRendererMaps(RenderBox* descendant, TrackedDescendantsMap*&, TrackedContainerMap*&); |
| static void removeFromTrackedRendererMaps(RenderBox* descendant, TrackedDescendantsMap*&, TrackedContainerMap*&); |
| |
| 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*/, SubtreeLayoutScope&) { return 0; } |
| |
| void createFirstLetterRenderer(RenderObject* firstLetterBlock, RenderObject* currentChild, unsigned length); |
| void updateFirstLetterStyle(RenderObject* firstLetterBlock, RenderObject* firstLetterContainer); |
| |
| Node* nodeForHitTest() const; |
| |
| // FIXME-BLOCKFLOW: Remove virtualizaion when all callers have moved to RenderBlockFlow |
| virtual void paintFloats(PaintInfo&, const LayoutPoint&, bool) { } |
| void paintContents(PaintInfo&, const LayoutPoint&); |
| void paintColumnContents(PaintInfo&, const LayoutPoint&, bool paintFloats = false); |
| void paintColumnRules(PaintInfo&, const LayoutPoint&); |
| void paintSelection(PaintInfo&, const LayoutPoint&); |
| void paintCaret(PaintInfo&, const LayoutPoint&, CaretType); |
| |
| bool hasCaret() const { return hasCaret(CursorCaret) || hasCaret(DragCaret); } |
| bool hasCaret(CaretType) const; |
| |
| virtual bool avoidsFloats() const; |
| |
| bool hitTestColumns(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction); |
| bool hitTestContents(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction); |
| // FIXME-BLOCKFLOW: Remove virtualizaion when all callers have moved to RenderBlockFlow |
| virtual bool hitTestFloats(const HitTestRequest&, HitTestResult&, const HitTestLocation&, const LayoutPoint&) { return false; } |
| |
| virtual bool isPointInOverflowControl(HitTestResult&, const LayoutPoint& locationInContainer, const LayoutPoint& accumulatedOffset); |
| |
| // FIXME: Make this method const so we can remove the const_cast in computeIntrinsicLogicalWidths. |
| void computeInlinePreferredLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth); |
| void computeBlockPreferredLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const; |
| |
| // 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(const RenderLayerModelObject* repaintContainer, LayoutUnit outlineWidth) const OVERRIDE FINAL; |
| virtual RenderStyle* outlineStyleForRepaint() const OVERRIDE FINAL; |
| |
| virtual RenderObject* hoverAncestor() const OVERRIDE FINAL; |
| virtual void updateDragState(bool dragOn) OVERRIDE FINAL; |
| virtual void childBecameNonInline(RenderObject* child) OVERRIDE FINAL; |
| |
| virtual LayoutRect selectionRectForRepaint(const RenderLayerModelObject* repaintContainer, bool /*clipToVisibleContent*/) OVERRIDE FINAL |
| { |
| return selectionGapRectsForRepaint(repaintContainer); |
| } |
| virtual bool shouldPaintSelectionGaps() const OVERRIDE FINAL; |
| 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); |
| |
| // FIXME-BLOCKFLOW: Remove virtualizaion when all callers have moved to RenderBlockFlow |
| virtual void clipOutFloatingObjects(RenderBlock*, const PaintInfo*, const LayoutPoint&, const LayoutSize&) { }; |
| |
| virtual void absoluteRects(Vector<IntRect>&, 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) OVERRIDE FINAL; |
| |
| void adjustPointToColumnContents(LayoutPoint&) const; |
| |
| void fitBorderToLinesIfNeeded(); // Shrink the box in which the border paints if border-fit is set. |
| virtual void adjustForBorderFit(LayoutUnit x, LayoutUnit& left, LayoutUnit& right) const; // Helper function for borderFitAdjust |
| |
| void markLinesDirtyInBlockRange(LayoutUnit logicalTop, LayoutUnit logicalBottom, RootInlineBox* highest = 0); |
| |
| Position positionForBox(InlineBox*, bool start = true) const; |
| PositionWithAffinity positionForPointWithInlineChildren(const LayoutPoint&); |
| |
| virtual void calcColumnWidth(); |
| void makeChildrenAnonymousColumnBlocks(RenderObject* beforeChild, RenderBlock* newBlockBox, RenderObject* newChild); |
| |
| bool expandsToEncloseOverhangingFloats() const; |
| |
| 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); |
| |
| // End helper functions and structs used by layoutBlockChildren. |
| |
| protected: |
| void determineLogicalLeftPositionForChild(RenderBox* child, ApplyLayoutDeltaMode = DoNotApplyLayoutDelta); |
| |
| // Pagination routines. |
| virtual bool relayoutForPagination(bool hasSpecifiedPageLogicalHeight, LayoutUnit pageLogicalHeight, LayoutStateMaintainer&); |
| bool relayoutToAvoidWidows(LayoutStateMaintainer&); |
| |
| // 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; |
| |
| virtual ColumnInfo::PaginationUnit paginationUnit() const; |
| |
| public: |
| LayoutUnit pageLogicalTopForOffset(LayoutUnit offset) const; |
| LayoutUnit pageLogicalHeightForOffset(LayoutUnit offset) const; |
| LayoutUnit pageRemainingLogicalHeightForOffset(LayoutUnit offset, PageBoundaryRule = IncludePageBoundary) const; |
| |
| protected: |
| bool pushToNextPageWithMinimumLogicalHeight(LayoutUnit& adjustment, LayoutUnit logicalOffset, LayoutUnit minimumLogicalHeight) const; |
| |
| // A page break is required at some offset due to space shortage in the current fragmentainer. |
| void setPageBreak(LayoutUnit offset, LayoutUnit spaceShortage); |
| |
| // Update minimum page height required to avoid fragmentation where it shouldn't occur (inside |
| // unbreakable content, between orphans and widows, etc.). This will be used as a hint to the |
| // column balancer to help set a good minimum column height. |
| void updateMinimumPageHeight(LayoutUnit offset, LayoutUnit minHeight); |
| |
| 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, RenderFlowThread*); // Computes a deltaOffset value that put a line at the top of the next page if it doesn't fit on the current page. |
| void updateRegionForLine(RootInlineBox*) const; |
| |
| // Adjust from painting offsets to the local coords of this renderer |
| void offsetForContents(LayoutPoint&) const; |
| |
| // 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, RenderFlowThread*) const; |
| |
| bool logicalWidthChangedInRegions(RenderFlowThread*) const; |
| |
| virtual bool requiresColumns(int desiredColumnCount) const; |
| |
| virtual bool updateLogicalWidthAndColumnWidth(); |
| |
| virtual bool canCollapseAnonymousBlockChild() const { return true; } |
| |
| public: |
| virtual LayoutUnit offsetFromLogicalTopOfFirstPage() const OVERRIDE FINAL; |
| RenderRegion* regionAtBlockOffset(LayoutUnit) const; |
| RenderRegion* clampToStartAndEndRegions(RenderRegion*) const; |
| |
| public: |
| |
| // Allocated only when some of these fields have non-default values |
| struct RenderBlockRareData { |
| WTF_MAKE_NONCOPYABLE(RenderBlockRareData); WTF_MAKE_FAST_ALLOCATED; |
| public: |
| RenderBlockRareData() |
| : m_paginationStrut(0) |
| , m_pageLogicalOffset(0) |
| , m_lineGridBox(0) |
| , m_lineBreakToAvoidWidow(-1) |
| , m_didBreakAtLineToAvoidWidow(false) |
| { |
| } |
| |
| LayoutUnit m_paginationStrut; |
| LayoutUnit m_pageLogicalOffset; |
| |
| RootInlineBox* m_lineGridBox; |
| |
| int m_lineBreakToAvoidWidow; |
| OwnPtr<ShapeInsideInfo> m_shapeInsideInfo; |
| bool m_didBreakAtLineToAvoidWidow : 1; |
| }; |
| |
| protected: |
| 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 : 27; |
| unsigned m_hasMarginBeforeQuirk : 1; // Note these quirk values can't be put in RenderBlockRareData since they are set too frequently. |
| unsigned m_hasMarginAfterQuirk : 1; |
| unsigned m_beingDestroyed : 1; |
| unsigned m_hasMarkupTruncation : 1; |
| unsigned m_hasBorderOrPaddingLogicalWidthChanged : 1; |
| |
| // RenderRubyBase objects need to be able to split and merge, moving their children around |
| // (calling moveChildTo, moveAllChildrenTo, and makeChildrenNonInline). |
| friend class RenderRubyBase; |
| // FIXME-BLOCKFLOW: Remove this when the line layout stuff has all moved out of RenderBlock |
| friend class LineBreaker; |
| |
| // FIXME: This is temporary as we move code that accesses block flow |
| // member variables out of RenderBlock and into RenderBlockFlow. |
| friend class RenderBlockFlow; |
| }; |
| |
| DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderBlock, isRenderBlock()); |
| |
| } // namespace WebCore |
| |
| #endif // RenderBlock_h |