| /* |
| * 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) 2003-2013 Apple Inc. All rights reserved. |
| * Copyright (C) Research In Motion Limited 2010. All rights reserved. |
| * Copyright (C) 2013 Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef RenderBlockFlow_h |
| #define RenderBlockFlow_h |
| |
| #include "core/layout/FloatingObjects.h" |
| #include "core/layout/line/TrailingObjects.h" |
| #include "core/layout/style/LayoutStyleConstants.h" |
| #include "core/rendering/RenderBlock.h" |
| |
| namespace blink { |
| |
| class MarginInfo; |
| class LineBreaker; |
| class LineInfo; |
| class LineWidth; |
| class LayoutMultiColumnFlowThread; |
| class LayoutMultiColumnSpannerPlaceholder; |
| class LayoutRubyRun; |
| template <class Run> class BidiRunList; |
| |
| class RenderBlockFlow : public RenderBlock { |
| public: |
| explicit RenderBlockFlow(ContainerNode*); |
| virtual ~RenderBlockFlow(); |
| |
| static RenderBlockFlow* createAnonymous(Document*); |
| |
| virtual bool isRenderBlockFlow() const override final { return true; } |
| |
| virtual void layoutBlock(bool relayoutChildren) override; |
| |
| virtual void computeOverflow(LayoutUnit oldClientAfterEdge, bool recomputeFloats = false) override; |
| |
| virtual void deleteLineBoxTree() override final; |
| |
| LayoutUnit availableLogicalWidthForLine(LayoutUnit position, bool shouldIndentText, LayoutUnit logicalHeight = 0) const |
| { |
| return max<LayoutUnit>(0, logicalRightOffsetForLine(position, shouldIndentText, logicalHeight) - logicalLeftOffsetForLine(position, shouldIndentText, logicalHeight)); |
| } |
| LayoutUnit logicalRightOffsetForLine(LayoutUnit position, bool shouldIndentText, LayoutUnit logicalHeight = 0) const |
| { |
| return logicalRightOffsetForLine(position, logicalRightOffsetForContent(), shouldIndentText, logicalHeight); |
| } |
| LayoutUnit logicalLeftOffsetForLine(LayoutUnit position, bool shouldIndentText, LayoutUnit logicalHeight = 0) const |
| { |
| return logicalLeftOffsetForLine(position, logicalLeftOffsetForContent(), 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); |
| } |
| |
| // FIXME-BLOCKFLOW: Move this into RenderBlockFlow once there are no calls |
| // in RenderBlock. http://crbug.com/393945, http://crbug.com/302024 |
| using RenderBlock::lineBoxes; |
| using RenderBlock::firstLineBox; |
| using RenderBlock::lastLineBox; |
| using RenderBlock::firstRootBox; |
| using RenderBlock::lastRootBox; |
| |
| virtual LayoutUnit logicalLeftSelectionOffset(const RenderBlock* rootBlock, LayoutUnit position) const override; |
| virtual LayoutUnit logicalRightSelectionOffset(const RenderBlock* rootBlock, LayoutUnit position) const override; |
| |
| RootInlineBox* createAndAppendRootInlineBox(); |
| |
| void markAllDescendantsWithFloatsForLayout(RenderBox* floatToRemove = 0, bool inLayout = true); |
| void markSiblingsWithFloatsForLayout(RenderBox* floatToRemove = 0); |
| |
| bool containsFloats() const { return m_floatingObjects && !m_floatingObjects->set().isEmpty(); } |
| bool containsFloat(RenderBox*) const; |
| |
| void removeFloatingObjects(); |
| |
| virtual void addChild(LayoutObject* newChild, LayoutObject* beforeChild = 0) override; |
| |
| void moveAllChildrenIncludingFloatsTo(RenderBlock* toBlock, bool fullRemoveInsert); |
| |
| bool generatesLineBoxesForInlineChild(LayoutObject*); |
| |
| LayoutUnit logicalTopForFloat(const FloatingObject* floatingObject) const { return isHorizontalWritingMode() ? floatingObject->y() : floatingObject->x(); } |
| LayoutUnit logicalBottomForFloat(const FloatingObject* floatingObject) const { return isHorizontalWritingMode() ? floatingObject->maxY() : floatingObject->maxX(); } |
| LayoutUnit logicalLeftForFloat(const FloatingObject* floatingObject) const { return isHorizontalWritingMode() ? floatingObject->x() : floatingObject->y(); } |
| LayoutUnit logicalRightForFloat(const FloatingObject* floatingObject) const { return isHorizontalWritingMode() ? floatingObject->maxX() : floatingObject->maxY(); } |
| LayoutUnit logicalWidthForFloat(const FloatingObject* floatingObject) const { return isHorizontalWritingMode() ? floatingObject->width() : floatingObject->height(); } |
| LayoutUnit logicalHeightForFloat(const FloatingObject* floatingObject) const { return isHorizontalWritingMode() ? floatingObject->height() : floatingObject->width(); } |
| LayoutSize logicalSizeForFloat(const FloatingObject* floatingObject) const { return isHorizontalWritingMode() ? LayoutSize(floatingObject->width(), floatingObject->height()) : LayoutSize(floatingObject->height(), floatingObject->width()); } |
| |
| int pixelSnappedLogicalTopForFloat(const FloatingObject* floatingObject) const { return isHorizontalWritingMode() ? floatingObject->frameRect().pixelSnappedY() : floatingObject->frameRect().pixelSnappedX(); } |
| int pixelSnappedLogicalBottomForFloat(const FloatingObject* floatingObject) const { return isHorizontalWritingMode() ? floatingObject->frameRect().pixelSnappedMaxY() : floatingObject->frameRect().pixelSnappedMaxX(); } |
| int pixelSnappedLogicalLeftForFloat(const FloatingObject* floatingObject) const { return isHorizontalWritingMode() ? floatingObject->frameRect().pixelSnappedX() : floatingObject->frameRect().pixelSnappedY(); } |
| int pixelSnappedLogicalRightForFloat(const FloatingObject* floatingObject) const { return isHorizontalWritingMode() ? floatingObject->frameRect().pixelSnappedMaxX() : floatingObject->frameRect().pixelSnappedMaxY(); } |
| |
| void setLogicalTopForFloat(FloatingObject* floatingObject, LayoutUnit logicalTop) |
| { |
| if (isHorizontalWritingMode()) |
| floatingObject->setY(logicalTop); |
| else |
| floatingObject->setX(logicalTop); |
| } |
| void setLogicalLeftForFloat(FloatingObject* floatingObject, LayoutUnit logicalLeft) |
| { |
| if (isHorizontalWritingMode()) |
| floatingObject->setX(logicalLeft); |
| else |
| floatingObject->setY(logicalLeft); |
| } |
| void setLogicalHeightForFloat(FloatingObject* floatingObject, LayoutUnit logicalHeight) |
| { |
| if (isHorizontalWritingMode()) |
| floatingObject->setHeight(logicalHeight); |
| else |
| floatingObject->setWidth(logicalHeight); |
| } |
| void setLogicalWidthForFloat(FloatingObject* floatingObject, LayoutUnit logicalWidth) |
| { |
| if (isHorizontalWritingMode()) |
| floatingObject->setWidth(logicalWidth); |
| else |
| floatingObject->setHeight(logicalWidth); |
| } |
| |
| LayoutUnit startAlignedOffsetForLine(LayoutUnit position, bool shouldIndentText); |
| |
| void setStaticInlinePositionForChild(RenderBox&, LayoutUnit inlinePosition); |
| void updateStaticInlinePositionForChild(RenderBox&, LayoutUnit logicalTop); |
| |
| static bool shouldSkipCreatingRunsForObject(LayoutObject* obj) |
| { |
| return obj->isFloating() || (obj->isOutOfFlowPositioned() && !obj->style()->isOriginalDisplayInlineType() && !obj->container()->isRenderInline()); |
| } |
| |
| LayoutMultiColumnFlowThread* multiColumnFlowThread() const { return m_rareData ? m_rareData->m_multiColumnFlowThread : 0; } |
| void resetMultiColumnFlowThread() |
| { |
| if (m_rareData) |
| m_rareData->m_multiColumnFlowThread = nullptr; |
| } |
| |
| void addOverflowFromInlineChildren(); |
| |
| // FIXME: This should be const to avoid a const_cast, but can modify child dirty bits and RenderCombineText |
| void computeInlinePreferredLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth); |
| |
| virtual bool shouldPaintSelectionGaps() const override final; |
| LayoutRect logicalLeftSelectionGap(const RenderBlock* rootBlock, const LayoutPoint& rootBlockPhysicalPosition, const LayoutSize& offsetFromRootBlock, |
| const LayoutObject* selObj, LayoutUnit logicalLeft, LayoutUnit logicalTop, LayoutUnit logicalHeight, const PaintInfo*) const; |
| LayoutRect logicalRightSelectionGap(const RenderBlock* rootBlock, const LayoutPoint& rootBlockPhysicalPosition, const LayoutSize& offsetFromRootBlock, |
| const LayoutObject* selObj, LayoutUnit logicalRight, LayoutUnit logicalTop, LayoutUnit logicalHeight, const PaintInfo*) const; |
| void getSelectionGapInfo(SelectionState, bool& leftGap, bool& rightGap) const; |
| |
| virtual LayoutRect selectionRectForPaintInvalidation(const LayoutBoxModelObject* paintInvalidationContainer) const override final; |
| GapRects selectionGapRectsForPaintInvalidation(const LayoutBoxModelObject* paintInvalidationContainer) const; |
| GapRects selectionGaps(const RenderBlock* rootBlock, const LayoutPoint& rootBlockPhysicalPosition, const LayoutSize& offsetFromRootBlock, |
| LayoutUnit& lastLogicalTop, LayoutUnit& lastLogicalLeft, LayoutUnit& lastLogicalRight, const PaintInfo* = 0) const; |
| GapRects inlineSelectionGaps(const RenderBlock* rootBlock, const LayoutPoint& rootBlockPhysicalPosition, const LayoutSize& offsetFromRootBlock, |
| LayoutUnit& lastLogicalTop, LayoutUnit& lastLogicalLeft, LayoutUnit& lastLogicalRight, const PaintInfo*) const; |
| GapRects blockSelectionGaps(const RenderBlock* rootBlock, const LayoutPoint& rootBlockPhysicalPosition, const LayoutSize& offsetFromRootBlock, |
| LayoutUnit& lastLogicalTop, LayoutUnit& lastLogicalLeft, LayoutUnit& lastLogicalRight, const PaintInfo*) const; |
| LayoutRect blockSelectionGap(const RenderBlock* rootBlock, const LayoutPoint& rootBlockPhysicalPosition, const LayoutSize& offsetFromRootBlock, |
| LayoutUnit lastLogicalTop, LayoutUnit lastLogicalLeft, LayoutUnit lastLogicalRight, LayoutUnit logicalBottom, const PaintInfo*) const; |
| |
| LayoutUnit paginationStrut() const { return m_rareData ? m_rareData->m_paginationStrut : LayoutUnit(); } |
| void setPaginationStrut(LayoutUnit); |
| |
| void positionSpannerDescendant(LayoutMultiColumnSpannerPlaceholder& child); |
| |
| virtual bool avoidsFloats() const override; |
| |
| using LayoutBoxModelObject::moveChildrenTo; |
| virtual void moveChildrenTo(LayoutBoxModelObject* toBoxModelObject, LayoutObject* startChild, LayoutObject* endChild, LayoutObject* beforeChild, bool fullRemoveInsert = false) override; |
| |
| LayoutUnit xPositionForFloatIncludingMargin(const FloatingObject* child) const |
| { |
| if (isHorizontalWritingMode()) |
| return child->x() + child->renderer()->marginLeft(); |
| |
| return child->x() + marginBeforeForChild(*(child->renderer())); |
| } |
| |
| LayoutUnit yPositionForFloatIncludingMargin(const FloatingObject* child) const |
| { |
| if (isHorizontalWritingMode()) |
| return child->y() + marginBeforeForChild(*(child->renderer())); |
| |
| return child->y() + child->renderer()->marginTop(); |
| } |
| |
| LayoutSize positionForFloatIncludingMargin(const FloatingObject* child) const |
| { |
| if (isHorizontalWritingMode()) { |
| return LayoutSize(child->x() + child->renderer()->marginLeft(), |
| child->y() + marginBeforeForChild(*(child->renderer()))); |
| } |
| |
| return LayoutSize(child->x() + marginBeforeForChild(*(child->renderer())), |
| child->y() + child->renderer()->marginTop()); |
| } |
| |
| LayoutPoint flipFloatForWritingModeForChild(const FloatingObject*, const LayoutPoint&) const; |
| |
| protected: |
| void rebuildFloatsFromIntruding(); |
| void layoutInlineChildren(bool relayoutChildren, LayoutUnit& paintInvalidationLogicalTop, LayoutUnit& paintInvalidationLogicalBottom, LayoutUnit afterEdge); |
| |
| void createFloatingObjects(); |
| |
| virtual void styleWillChange(StyleDifference, const LayoutStyle& newStyle) override; |
| virtual void styleDidChange(StyleDifference, const LayoutStyle* oldStyle) override; |
| |
| void updateBlockChildDirtyBitsBeforeLayout(bool relayoutChildren, RenderBox&); |
| |
| void addOverflowFromFloats(); |
| |
| LayoutUnit logicalRightOffsetForLine(LayoutUnit logicalTop, LayoutUnit fixedOffset, bool applyTextIndent, LayoutUnit logicalHeight = 0) const |
| { |
| return adjustLogicalRightOffsetForLine(logicalRightFloatOffsetForLine(logicalTop, fixedOffset, logicalHeight), applyTextIndent); |
| } |
| LayoutUnit logicalLeftOffsetForLine(LayoutUnit logicalTop, LayoutUnit fixedOffset, bool applyTextIndent, LayoutUnit logicalHeight = 0) const |
| { |
| return adjustLogicalLeftOffsetForLine(logicalLeftFloatOffsetForLine(logicalTop, fixedOffset, logicalHeight), applyTextIndent); |
| } |
| |
| virtual LayoutObject* layoutSpecialExcludedChild(bool /*relayoutChildren*/, SubtreeLayoutScope&); |
| virtual bool updateLogicalWidthAndColumnWidth() override; |
| |
| void setLogicalLeftForChild(RenderBox& child, LayoutUnit logicalLeft); |
| void setLogicalTopForChild(RenderBox& child, LayoutUnit logicalTop); |
| void determineLogicalLeftPositionForChild(RenderBox& child); |
| |
| private: |
| bool layoutBlockFlow(bool relayoutChildren, LayoutUnit& pageLogicalHeight, SubtreeLayoutScope&); |
| void layoutBlockChildren(bool relayoutChildren, SubtreeLayoutScope&, LayoutUnit beforeEdge, LayoutUnit afterEdge); |
| |
| void layoutBlockChild(RenderBox& child, MarginInfo&, LayoutUnit& previousFloatLogicalBottom); |
| void adjustPositionedBlock(RenderBox& child, const MarginInfo&); |
| void adjustFloatingBlock(const MarginInfo&); |
| |
| LayoutPoint computeLogicalLocationForFloat(const FloatingObject*, LayoutUnit logicalTopOffset) const; |
| |
| 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(LineWidth* = 0); |
| |
| LayoutUnit getClearDelta(RenderBox* child, LayoutUnit yPos); |
| |
| bool hasOverhangingFloats() { return parent() && !hasColumns() && containsFloats() && lowestFloatLogicalBottom() > logicalHeight(); } |
| bool hasOverhangingFloat(RenderBox*); |
| void addIntrudingFloats(RenderBlockFlow* prev, LayoutUnit xoffset, LayoutUnit yoffset); |
| void addOverhangingFloats(RenderBlockFlow* child, bool makeChildPaintOtherFloats); |
| |
| LayoutUnit lowestFloatLogicalBottom(FloatingObject::Type = FloatingObject::FloatLeftRight) const; |
| LayoutUnit nextFloatLogicalBottomBelow(LayoutUnit, ShapeOutsideFloatOffsetMode = ShapeOutsideFloatMarginBoxOffset) const; |
| |
| virtual bool hitTestFloats(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset) override final; |
| |
| virtual void invalidatePaintForOverhangingFloats(bool paintAllDescendants) override final; |
| virtual void invalidatePaintForOverflow() override final; |
| virtual void paintFloats(const PaintInfo&, const LayoutPoint&, bool preservePhase = false) override final; |
| virtual void paintSelection(const PaintInfo&, const LayoutPoint&) override final; |
| virtual void clipOutFloatingObjects(const RenderBlock*, const PaintInfo*, const LayoutPoint&, const LayoutSize&) const override; |
| void clearFloats(EClear); |
| |
| LayoutUnit logicalRightFloatOffsetForLine(LayoutUnit logicalTop, LayoutUnit fixedOffset, LayoutUnit logicalHeight) const; |
| LayoutUnit logicalLeftFloatOffsetForLine(LayoutUnit logicalTop, LayoutUnit fixedOffset, LayoutUnit logicalHeight) const; |
| |
| LayoutUnit logicalRightOffsetForPositioningFloat(LayoutUnit logicalTop, LayoutUnit fixedOffset, bool applyTextIndent, LayoutUnit* heightRemaining) const; |
| LayoutUnit logicalLeftOffsetForPositioningFloat(LayoutUnit logicalTop, LayoutUnit fixedOffset, bool applyTextIndent, LayoutUnit* heightRemaining) const; |
| |
| LayoutUnit adjustLogicalRightOffsetForLine(LayoutUnit offsetFromFloats, bool applyTextIndent) const; |
| LayoutUnit adjustLogicalLeftOffsetForLine(LayoutUnit offsetFromFloats, bool applyTextIndent) const; |
| |
| virtual RootInlineBox* createRootInlineBox(); // Subclassed by SVG |
| |
| bool isPagedOverflow(const LayoutStyle&); |
| |
| enum FlowThreadType { |
| NoFlowThread, |
| MultiColumnFlowThread, |
| PagedFlowThread |
| }; |
| |
| FlowThreadType flowThreadType(const LayoutStyle&); |
| |
| LayoutMultiColumnFlowThread* createMultiColumnFlowThread(FlowThreadType); |
| void createOrDestroyMultiColumnFlowThreadIfNeeded(const LayoutStyle* oldStyle); |
| |
| void updateLogicalWidthForAlignment(const ETextAlign&, const RootInlineBox*, BidiRun* trailingSpaceRun, float& logicalLeft, float& totalLogicalWidth, float& availableLogicalWidth, unsigned expansionOpportunityCount); |
| void checkForPaginationLogicalHeightChange(LayoutUnit& pageLogicalHeight, bool& pageLogicalHeightChanged, bool& hasSpecifiedPageLogicalHeight); |
| bool shouldRelayoutForPagination(LayoutUnit& pageLogicalHeight, LayoutUnit layoutOverflowLogicalBottom) const; |
| void setColumnCountAndHeight(unsigned count, LayoutUnit pageLogicalHeight); |
| |
| 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; } |
| |
| public: |
| struct FloatWithRect { |
| FloatWithRect(RenderBox* f) |
| : object(f) |
| , rect(f->frameRect()) |
| , everHadLayout(f->everHadLayout()) |
| { |
| rect.expand(f->marginBoxOutsets()); |
| } |
| |
| RenderBox* object; |
| LayoutRect rect; |
| bool everHadLayout; |
| }; |
| |
| 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) const; |
| |
| // Allocated only when some of these fields have non-default values |
| struct RenderBlockFlowRareData { |
| WTF_MAKE_NONCOPYABLE(RenderBlockFlowRareData); WTF_MAKE_FAST_ALLOCATED; |
| public: |
| RenderBlockFlowRareData(const RenderBlockFlow* block) |
| : m_margins(positiveMarginBeforeDefault(block), negativeMarginBeforeDefault(block), positiveMarginAfterDefault(block), negativeMarginAfterDefault(block)) |
| , m_paginationStrut(0) |
| , m_multiColumnFlowThread(nullptr) |
| , m_lineBreakToAvoidWidow(-1) |
| , m_didBreakAtLineToAvoidWidow(false) |
| , m_discardMarginBefore(false) |
| , m_discardMarginAfter(false) |
| { |
| } |
| |
| static LayoutUnit positiveMarginBeforeDefault(const RenderBlockFlow* block) |
| { |
| return std::max<LayoutUnit>(block->marginBefore(), 0); |
| } |
| static LayoutUnit negativeMarginBeforeDefault(const RenderBlockFlow* block) |
| { |
| return std::max<LayoutUnit>(-block->marginBefore(), 0); |
| } |
| static LayoutUnit positiveMarginAfterDefault(const RenderBlockFlow* block) |
| { |
| return std::max<LayoutUnit>(block->marginAfter(), 0); |
| } |
| static LayoutUnit negativeMarginAfterDefault(const RenderBlockFlow* block) |
| { |
| return std::max<LayoutUnit>(-block->marginAfter(), 0); |
| } |
| |
| MarginValues m_margins; |
| LayoutUnit m_paginationStrut; |
| |
| LayoutMultiColumnFlowThread* m_multiColumnFlowThread; |
| |
| int m_lineBreakToAvoidWidow; |
| bool m_didBreakAtLineToAvoidWidow : 1; |
| bool m_discardMarginBefore : 1; |
| bool m_discardMarginAfter : 1; |
| }; |
| LayoutUnit marginOffsetForSelfCollapsingBlock(); |
| |
| FloatingObjects* floatingObjects() { return m_floatingObjects.get(); } |
| |
| |
| protected: |
| LayoutUnit maxPositiveMarginBefore() const { return m_rareData ? m_rareData->m_margins.positiveMarginBefore() : RenderBlockFlowRareData::positiveMarginBeforeDefault(this); } |
| LayoutUnit maxNegativeMarginBefore() const { return m_rareData ? m_rareData->m_margins.negativeMarginBefore() : RenderBlockFlowRareData::negativeMarginBeforeDefault(this); } |
| LayoutUnit maxPositiveMarginAfter() const { return m_rareData ? m_rareData->m_margins.positiveMarginAfter() : RenderBlockFlowRareData::positiveMarginAfterDefault(this); } |
| LayoutUnit maxNegativeMarginAfter() const { return m_rareData ? m_rareData->m_margins.negativeMarginAfter() : RenderBlockFlowRareData::negativeMarginAfterDefault(this); } |
| |
| void setMaxMarginBeforeValues(LayoutUnit pos, LayoutUnit neg); |
| void setMaxMarginAfterValues(LayoutUnit pos, LayoutUnit neg); |
| |
| void setMustDiscardMarginBefore(bool = true); |
| void setMustDiscardMarginAfter(bool = true); |
| |
| bool mustDiscardMarginBefore() const; |
| bool mustDiscardMarginAfter() const; |
| |
| bool mustDiscardMarginBeforeForChild(const RenderBox&) const; |
| bool mustDiscardMarginAfterForChild(const RenderBox&) const; |
| |
| bool mustSeparateMarginBeforeForChild(const RenderBox&) const; |
| bool mustSeparateMarginAfterForChild(const RenderBox&) const; |
| |
| void initMaxMarginValues() |
| { |
| if (m_rareData) { |
| m_rareData->m_margins = MarginValues(RenderBlockFlowRareData::positiveMarginBeforeDefault(this) , RenderBlockFlowRareData::negativeMarginBeforeDefault(this), |
| RenderBlockFlowRareData::positiveMarginAfterDefault(this), RenderBlockFlowRareData::negativeMarginAfterDefault(this)); |
| |
| m_rareData->m_discardMarginBefore = false; |
| m_rareData->m_discardMarginAfter = false; |
| } |
| } |
| |
| virtual ETextAlign textAlignmentForLine(bool endsWithSoftBreak) const; |
| private: |
| virtual LayoutUnit collapsedMarginBefore() const override final { return maxPositiveMarginBefore() - maxNegativeMarginBefore(); } |
| virtual LayoutUnit collapsedMarginAfter() const override final { return maxPositiveMarginAfter() - maxNegativeMarginAfter(); } |
| |
| LayoutUnit collapseMargins(RenderBox& child, MarginInfo&, bool childIsSelfCollapsing); |
| LayoutUnit clearFloatsIfNeeded(RenderBox& child, MarginInfo&, LayoutUnit oldTopPosMargin, LayoutUnit oldTopNegMargin, LayoutUnit yPos, bool childIsSelfCollapsing); |
| LayoutUnit estimateLogicalTopPosition(RenderBox& child, const MarginInfo&, LayoutUnit& estimateWithoutPagination); |
| void marginBeforeEstimateForChild(RenderBox&, LayoutUnit&, LayoutUnit&, bool&) const; |
| void handleAfterSideOfBlock(RenderBox* lastChild, LayoutUnit top, LayoutUnit bottom, MarginInfo&); |
| void setCollapsedBottomMargin(const MarginInfo&); |
| |
| 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 adjustBlockChildForPagination(LayoutUnit logicalTopAfterClear, LayoutUnit estimateWithoutPagination, RenderBox& child, bool atBeforeSideOfBlock); |
| // 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 adjustLinePositionForPagination(RootInlineBox&, LayoutUnit& deltaOffset, LayoutFlowThread*); |
| // If the child is unsplittable and can't fit on the current page, return the top of the next page/column. |
| LayoutUnit adjustForUnsplittableChild(RenderBox&, LayoutUnit logicalOffset, bool includeMargins = false); |
| |
| // Used to store state between styleWillChange and styleDidChange |
| static bool s_canPropagateFloatIntoSibling; |
| |
| RenderBlockFlowRareData& ensureRareData(); |
| |
| LayoutUnit m_paintInvalidationLogicalTop; |
| LayoutUnit m_paintInvalidationLogicalBottom; |
| |
| virtual bool isSelfCollapsingBlock() const override; |
| |
| protected: |
| OwnPtr<RenderBlockFlowRareData> m_rareData; |
| OwnPtr<FloatingObjects> m_floatingObjects; |
| |
| friend class BreakingContext; // FIXME: It uses insertFloatingObject and positionNewFloatOnLine, if we move those out from the private scope/add a helper to LineBreaker, we can remove this friend |
| friend class MarginInfo; |
| friend class LineBreaker; |
| friend class LineWidth; // needs to know FloatingObject |
| |
| // FIXME-BLOCKFLOW: These methods have implementations in |
| // RenderBlockLineLayout. They should be moved to the proper header once the |
| // line layout code is separated from RenderBlock and RenderBlockFlow. |
| // START METHODS DEFINED IN RenderBlockLineLayout |
| private: |
| InlineFlowBox* createLineBoxes(LayoutObject*, const LineInfo&, InlineBox* childBox); |
| RootInlineBox* constructLine(BidiRunList<BidiRun>&, const LineInfo&); |
| void setMarginsForRubyRun(BidiRun*, LayoutRubyRun*, LayoutObject*, const LineInfo&); |
| void computeInlineDirectionPositionsForLine(RootInlineBox*, const LineInfo&, BidiRun* firstRun, BidiRun* trailingSpaceRun, bool reachedEnd, GlyphOverflowAndFallbackFontsMap&, VerticalPositionCache&, WordMeasurements&); |
| BidiRun* computeInlineDirectionPositionsForSegment(RootInlineBox*, const LineInfo&, ETextAlign, float& logicalLeft, |
| float& availableLogicalWidth, BidiRun* firstRun, BidiRun* trailingSpaceRun, GlyphOverflowAndFallbackFontsMap& textBoxDataMap, VerticalPositionCache&, WordMeasurements&); |
| void computeBlockDirectionPositionsForLine(RootInlineBox*, BidiRun*, GlyphOverflowAndFallbackFontsMap&, VerticalPositionCache&); |
| void appendFloatingObjectToLastLine(FloatingObject*); |
| // Helper function for layoutInlineChildren() |
| RootInlineBox* createLineBoxesFromBidiRuns(unsigned bidiLevel, BidiRunList<BidiRun>&, const InlineIterator& end, LineInfo&, VerticalPositionCache&, BidiRun* trailingSpaceRun, WordMeasurements&); |
| void layoutRunsAndFloats(LineLayoutState&); |
| const InlineIterator& restartLayoutRunsAndFloatsInRange(LayoutUnit oldLogicalHeight, LayoutUnit newLogicalHeight, FloatingObject* lastFloatFromPreviousLine, InlineBidiResolver&, const InlineIterator&); |
| void layoutRunsAndFloatsInRange(LineLayoutState&, InlineBidiResolver&, |
| const InlineIterator& cleanLineStart, const BidiStatus& cleanLineBidiStatus); |
| void linkToEndLineIfNeeded(LineLayoutState&); |
| static void markDirtyFloatsForPaintInvalidation(Vector<FloatWithRect>& floats); |
| 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 checkPaginationAndFloatsAtEndLine(LineLayoutState&); |
| bool matchedEndLine(LineLayoutState&, const InlineBidiResolver&, const InlineIterator& endLineStart, const BidiStatus& endLineStatus); |
| 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 positionDialog(); |
| |
| // END METHODS DEFINED IN RenderBlockLineLayout |
| |
| }; |
| |
| DEFINE_LAYOUT_OBJECT_TYPE_CASTS(RenderBlockFlow, isRenderBlockFlow()); |
| |
| } // namespace blink |
| |
| #endif // RenderBlockFlow_h |
