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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.
*/
#ifndef RenderFlexibleBox_h
#define RenderFlexibleBox_h
#include "core/rendering/OrderIterator.h"
#include "core/rendering/RenderBlock.h"
namespace WebCore {
class RenderFlexibleBox : public RenderBlock {
public:
RenderFlexibleBox(Element*);
virtual ~RenderFlexibleBox();
static RenderFlexibleBox* createAnonymous(Document*);
virtual const char* renderName() const OVERRIDE;
virtual bool isFlexibleBox() const OVERRIDE FINAL { return true; }
virtual bool avoidsFloats() const OVERRIDE FINAL { return true; }
virtual bool canCollapseAnonymousBlockChild() const OVERRIDE FINAL { return false; }
virtual void layoutBlock(bool relayoutChildren, LayoutUnit pageLogicalHeight = 0) OVERRIDE FINAL;
virtual int baselinePosition(FontBaseline, bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const OVERRIDE;
virtual int firstLineBoxBaseline() const OVERRIDE;
virtual int inlineBlockBaseline(LineDirectionMode) const OVERRIDE;
virtual void paintChildren(PaintInfo&, const LayoutPoint&) OVERRIDE FINAL;
bool isHorizontalFlow() const;
protected:
virtual void computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const OVERRIDE;
virtual bool supportsPartialLayout() const OVERRIDE { return false; }
virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle);
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 hasOrthogonalFlow(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);
LayoutUnit computeMainAxisExtentForChild(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);
EAlignItems alignmentForChild(RenderBox* child) const;
LayoutUnit mainAxisBorderAndPaddingExtentForChild(RenderBox* child) const;
LayoutUnit mainAxisScrollbarExtentForChild(RenderBox* child) const;
LayoutUnit preferredMainAxisContentExtentForChild(RenderBox* child, bool hasInfiniteLineLength);
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(Length margin, RenderView*);
void prepareOrderIteratorAndMargins();
LayoutUnit adjustChildSizeForMinAndMax(RenderBox*, LayoutUnit childSize);
// The hypothetical main size of an item is the flex base size clamped according to its min and max main size properties
bool computeNextFlexLine(OrderedFlexItemList& orderedChildren, LayoutUnit& sumFlexBaseSize, double& totalFlexGrow, double& totalWeightedFlexShrink, LayoutUnit& sumHypotheticalMainSize, 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);
mutable OrderIterator m_orderIterator;
int m_numberOfInFlowChildrenOnFirstLine;
};
DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderFlexibleBox, isFlexibleBox());
} // namespace WebCore
#endif // RenderFlexibleBox_h
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