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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 FlexibleBoxAlgorithm_h
#define FlexibleBoxAlgorithm_h
#include "core/CoreExport.h"
#include "core/layout/OrderIterator.h"
#include "core/style/ComputedStyle.h"
#include "platform/LayoutUnit.h"
#include "wtf/Noncopyable.h"
#include "wtf/Vector.h"
namespace blink {
class LayoutBox;
class FlexItem {
public:
FlexItem(LayoutBox*,
LayoutUnit flexBaseContentSize,
LayoutUnit hypotheticalMainContentSize,
LayoutUnit mainAxisBorderAndPadding,
LayoutUnit mainAxisMargin);
LayoutUnit hypotheticalMainAxisMarginBoxSize() const {
return hypotheticalMainContentSize + mainAxisBorderAndPadding +
mainAxisMargin;
}
LayoutUnit flexBaseMarginBoxSize() const {
return flexBaseContentSize + mainAxisBorderAndPadding + mainAxisMargin;
}
LayoutUnit flexedMarginBoxSize() const {
return flexedContentSize + mainAxisBorderAndPadding + mainAxisMargin;
}
LayoutBox* box;
const LayoutUnit flexBaseContentSize;
const LayoutUnit hypotheticalMainContentSize;
const LayoutUnit mainAxisBorderAndPadding;
const LayoutUnit mainAxisMargin;
LayoutUnit flexedContentSize;
bool frozen;
};
class FlexLayoutAlgorithm {
WTF_MAKE_NONCOPYABLE(FlexLayoutAlgorithm);
public:
FlexLayoutAlgorithm(const ComputedStyle*,
LayoutUnit lineBreakLength,
const Vector<FlexItem>& allItems);
// The hypothetical main size of an item is the flex base size clamped
// according to its min and max main size properties
bool ComputeNextFlexLine(size_t& nextIndex,
Vector<FlexItem>& lineItems,
LayoutUnit& sumFlexBaseSize,
double& totalFlexGrow,
double& totalFlexShrink,
double& totalWeightedFlexShrink,
LayoutUnit& sumHypotheticalMainSize);
private:
bool isMultiline() const { return m_style->flexWrap() != FlexNoWrap; }
const ComputedStyle* m_style;
LayoutUnit m_lineBreakLength;
const Vector<FlexItem>& m_allItems;
};
} // namespace blink
#endif // FlexibleBoxAlgorithm_h
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