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/*
* Copyright (C) 2011 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.
*/
#pragma once
#include "OrderIterator.h"
#include "RenderBlock.h"
namespace WebCore {
class RenderFlexibleBox : public RenderBlock {
public:
RenderFlexibleBox(Element&, RenderStyle&&);
RenderFlexibleBox(Document&, RenderStyle&&);
virtual ~RenderFlexibleBox();
const char* renderName() const override;
bool avoidsFloats() const final { return true; }
bool canDropAnonymousBlockChild() const final { return false; }
void layoutBlock(bool relayoutChildren, LayoutUnit pageLogicalHeight = 0) final;
int baselinePosition(FontBaseline, bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const override;
std::optional<int> firstLineBaseline() const override;
std::optional<int> inlineBlockBaseline(LineDirectionMode) const override;
void paintChildren(PaintInfo& forSelf, const LayoutPoint&, PaintInfo& forChild, bool usePrintRect) override;
bool isHorizontalFlow() const;
bool isTopLayoutOverflowAllowed() const override;
bool isLeftLayoutOverflowAllowed() const override;
protected:
void computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const override;
void computePreferredLogicalWidths() override;
void styleDidChange(StyleDifference, const RenderStyle* oldStyle) override;
private:
enum FlexSign {
PositiveFlexibility,
NegativeFlexibility,
};
enum PositionedLayoutMode {
FlipForRowReverse,
NoFlipForRowReverse,
};
typedef HashMap<const RenderBox*, LayoutUnit> InflexibleFlexItemSize;
typedef Vector<RenderBox*> OrderedFlexItemList;
struct LineContext;
struct Violation;
// Use an inline capacity of 8, since flexbox containers usually have less than 8 children.
typedef Vector<LayoutRect, 8> ChildFrameRects;
bool isFlexibleBox() const final { return true; }
bool hasOrthogonalFlow(const RenderBox& child) const;
bool isColumnFlow() const;
bool isLeftToRightFlow() const;
bool isMultiline() const;
Length flexBasisForChild(RenderBox& child) const;
void setCrossAxisExtent(LayoutUnit);
LayoutUnit crossAxisExtentForChild(RenderBox& child) const;
LayoutUnit mainAxisExtentForChild(RenderBox& child) const;
LayoutUnit crossAxisExtent() const;
LayoutUnit mainAxisExtent() const;
LayoutUnit crossAxisContentExtent() const;
LayoutUnit mainAxisContentExtent(LayoutUnit contentLogicalHeight);
std::optional<LayoutUnit> computeMainAxisExtentForChild(const RenderBox& child, SizeType, const Length& size);
WritingMode transformedWritingMode() const;
LayoutUnit flowAwareBorderStart() const;
LayoutUnit flowAwareBorderEnd() const;
LayoutUnit flowAwareBorderBefore() const;
LayoutUnit flowAwareBorderAfter() const;
LayoutUnit flowAwarePaddingStart() const;
LayoutUnit flowAwarePaddingEnd() const;
LayoutUnit flowAwarePaddingBefore() const;
LayoutUnit flowAwarePaddingAfter() const;
LayoutUnit flowAwareMarginStartForChild(RenderBox& child) const;
LayoutUnit flowAwareMarginEndForChild(RenderBox& child) const;
LayoutUnit flowAwareMarginBeforeForChild(RenderBox& child) const;
LayoutUnit flowAwareMarginAfterForChild(RenderBox& child) const;
LayoutUnit crossAxisMarginExtentForChild(RenderBox& child) const;
LayoutUnit crossAxisScrollbarExtent() const;
LayoutPoint flowAwareLocationForChild(RenderBox& child) const;
// FIXME: Supporting layout deltas.
void setFlowAwareLocationForChild(RenderBox& child, const LayoutPoint&);
void adjustAlignmentForChild(RenderBox& child, LayoutUnit);
ItemPosition alignmentForChild(RenderBox& child) const;
LayoutUnit mainAxisBorderAndPaddingExtentForChild(RenderBox& child) const;
LayoutUnit mainAxisScrollbarExtentForChild(RenderBox& child) const;
LayoutUnit preferredMainAxisContentExtentForChild(RenderBox& child, bool hasInfiniteLineLength);
EOverflow mainAxisOverflowForChild(const RenderBox&) const;
void layoutFlexItems(bool relayoutChildren, Vector<LineContext>&);
LayoutUnit autoMarginOffsetInMainAxis(const OrderedFlexItemList&, LayoutUnit& availableFreeSpace);
void updateAutoMarginsInMainAxis(RenderBox& child, LayoutUnit autoMarginOffset);
bool hasAutoMarginsInCrossAxis(RenderBox& child) const;
bool updateAutoMarginsInCrossAxis(RenderBox& child, LayoutUnit availableAlignmentSpace);
void repositionLogicalHeightDependentFlexItems(Vector<LineContext>&);
LayoutUnit clientLogicalBottomAfterRepositioning();
void appendChildFrameRects(ChildFrameRects&);
void repaintChildrenDuringLayoutIfMoved(const ChildFrameRects&);
LayoutUnit availableAlignmentSpaceForChild(LayoutUnit lineCrossAxisExtent, RenderBox&);
LayoutUnit marginBoxAscentForChild(RenderBox&);
LayoutUnit computeChildMarginValue(const Length& margin);
void prepareOrderIteratorAndMargins();
LayoutUnit adjustChildSizeForMinAndMax(const RenderBox&, LayoutUnit childSize);
LayoutUnit adjustChildSizeForAspectRatioCrossAxisMinAndMax(const RenderBox&, LayoutUnit childSize);
bool computeNextFlexLine(OrderedFlexItemList& orderedChildren, LayoutUnit& preferredMainAxisExtent, double& totalFlexGrow, double& totalWeightedFlexShrink, LayoutUnit& minMaxAppliedMainAxisExtent, bool& hasInfiniteLineLength);
bool resolveFlexibleLengths(FlexSign, const OrderedFlexItemList&, LayoutUnit& availableFreeSpace, double& totalFlexGrow, double& totalWeightedFlexShrink, InflexibleFlexItemSize&, Vector<LayoutUnit>& childSizes, bool hasInfiniteLineLength);
void freezeViolations(const Vector<Violation>&, LayoutUnit& availableFreeSpace, double& totalFlexGrow, double& totalWeightedFlexShrink, InflexibleFlexItemSize&, bool hasInfiniteLineLength);
void resetAutoMarginsAndLogicalTopInCrossAxis(RenderBox&);
bool needToStretchChild(RenderBox&);
void setLogicalOverrideSize(RenderBox& child, LayoutUnit childPreferredSize);
void prepareChildForPositionedLayout(RenderBox& child, LayoutUnit mainAxisOffset, LayoutUnit crossAxisOffset, PositionedLayoutMode);
size_t numberOfInFlowPositionedChildren(const OrderedFlexItemList&) const;
void layoutAndPlaceChildren(LayoutUnit& crossAxisOffset, const OrderedFlexItemList&, const Vector<LayoutUnit>& childSizes, LayoutUnit availableFreeSpace, bool relayoutChildren, Vector<LineContext>&);
void layoutColumnReverse(const OrderedFlexItemList&, LayoutUnit crossAxisOffset, LayoutUnit availableFreeSpace);
void alignFlexLines(Vector<LineContext>&);
void alignChildren(const Vector<LineContext>&);
void applyStretchAlignmentToChild(RenderBox&, LayoutUnit lineCrossAxisExtent);
void flipForRightToLeftColumn();
void flipForWrapReverse(const Vector<LineContext>&, LayoutUnit crossAxisStartEdge);
bool mainAxisLengthIsDefinite(const RenderBox&, const Length&) const;
bool crossAxisLengthIsDefinite(const RenderBox&, const Length&) const;
bool useChildAspectRatio(const RenderBox&) const;
std::optional<LayoutUnit> computeMainSizeFromAspectRatioUsing(const RenderBox& child, Length crossSizeLength) const;
virtual bool isFlexibleBoxImpl() const { return false; };
mutable OrderIterator m_orderIterator;
int m_numberOfInFlowChildrenOnFirstLine;
};
} // namespace WebCore
SPECIALIZE_TYPE_TRAITS_RENDER_OBJECT(RenderFlexibleBox, isFlexibleBox())
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