blob: 78e65cc737869aabc0805fd55388459c9962f7b4 [file] [log] [blame]
/*
* Copyright (C) 2012 Google Inc. All rights reserved.
* Copyright (C) 2013, 2014 Igalia S.L.
*
* 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 "GridLength.h"
namespace WebCore {
enum GridTrackSizeType {
LengthTrackSizing,
MinMaxTrackSizing,
FitContentTrackSizing
};
// This class represents a <track-size> from the spec. Althought there are 3 different types of
// <track-size> there is always an equivalent minmax() representation that could represent any of
// them. The only special case is fit-content(argument) which is similar to minmax(auto,
// max-content) except that the track size is clamped at argument if it is greater than the auto
// minimum. At the GridTrackSize level we don't need to worry about clamping so we treat that case
// exactly as auto.
//
// We're using a separate attribute to store fit-content argument even though we could directly use
// m_maxTrackBreadth. The reason why we don't do it is because the maxTrackBreadh() call is a hot
// spot, so adding a conditional statement there (to distinguish between fit-content and any other
// case) was causing a severe performance drop.
class GridTrackSize {
public:
GridTrackSize(const GridLength& length, GridTrackSizeType trackSizeType = LengthTrackSizing)
: m_type(trackSizeType)
, m_minTrackBreadth(trackSizeType == FitContentTrackSizing ? Length(LengthType::Auto) : length)
, m_maxTrackBreadth(trackSizeType == FitContentTrackSizing ? Length(LengthType::Auto) : length)
, m_fitContentTrackBreadth(trackSizeType == FitContentTrackSizing ? length : GridLength(Length(LengthType::Fixed)))
{
ASSERT(trackSizeType == LengthTrackSizing || trackSizeType == FitContentTrackSizing);
ASSERT(trackSizeType != FitContentTrackSizing || length.isLength());
cacheMinMaxTrackBreadthTypes();
}
GridTrackSize(const GridLength& minTrackBreadth, const GridLength& maxTrackBreadth)
: m_type(MinMaxTrackSizing)
, m_minTrackBreadth(minTrackBreadth)
, m_maxTrackBreadth(maxTrackBreadth)
, m_fitContentTrackBreadth(GridLength(Length(LengthType::Fixed)))
{
cacheMinMaxTrackBreadthTypes();
}
const GridLength& fitContentTrackBreadth() const
{
ASSERT(m_type == FitContentTrackSizing);
return m_fitContentTrackBreadth;
}
const GridLength& minTrackBreadth() const { return m_minTrackBreadth; }
const GridLength& maxTrackBreadth() const { return m_maxTrackBreadth; }
GridTrackSizeType type() const { return m_type; }
bool isContentSized() const { return m_minTrackBreadth.isContentSized() || m_maxTrackBreadth.isContentSized(); }
bool isFitContent() const { return m_type == FitContentTrackSizing; }
bool operator==(const GridTrackSize& other) const
{
return m_type == other.m_type && m_minTrackBreadth == other.m_minTrackBreadth && m_maxTrackBreadth == other.m_maxTrackBreadth
&& m_fitContentTrackBreadth == other.m_fitContentTrackBreadth;
}
void cacheMinMaxTrackBreadthTypes()
{
m_minTrackBreadthIsAuto = minTrackBreadth().isLength() && minTrackBreadth().length().isAuto();
m_minTrackBreadthIsMinContent = minTrackBreadth().isLength() && minTrackBreadth().length().isMinContent();
m_minTrackBreadthIsMaxContent = minTrackBreadth().isLength() && minTrackBreadth().length().isMaxContent();
m_maxTrackBreadthIsMaxContent = maxTrackBreadth().isLength() && maxTrackBreadth().length().isMaxContent();
m_maxTrackBreadthIsMinContent = maxTrackBreadth().isLength() && maxTrackBreadth().length().isMinContent();
m_maxTrackBreadthIsAuto = maxTrackBreadth().isLength() && maxTrackBreadth().length().isAuto();
m_maxTrackBreadthIsFixed = maxTrackBreadth().isLength() && maxTrackBreadth().length().isSpecified();
// These values depend on the above ones so keep them here.
m_minTrackBreadthIsIntrinsic = m_minTrackBreadthIsMaxContent || m_minTrackBreadthIsMinContent
|| m_minTrackBreadthIsAuto || isFitContent();
m_maxTrackBreadthIsIntrinsic = m_maxTrackBreadthIsMaxContent || m_maxTrackBreadthIsMinContent
|| m_maxTrackBreadthIsAuto || isFitContent();
}
bool hasIntrinsicMinTrackBreadth() const { return m_minTrackBreadthIsIntrinsic; }
bool hasIntrinsicMaxTrackBreadth() const { return m_maxTrackBreadthIsIntrinsic; }
bool hasMinOrMaxContentMinTrackBreadth() const { return m_minTrackBreadthIsMaxContent || m_minTrackBreadthIsMinContent; }
bool hasAutoMinTrackBreadth() const { return m_minTrackBreadthIsAuto; }
bool hasAutoMaxTrackBreadth() const { return m_maxTrackBreadthIsAuto; }
bool hasMaxContentMaxTrackBreadth() const { return m_maxTrackBreadthIsMaxContent; }
bool hasMaxContentOrAutoMaxTrackBreadth() const { return m_maxTrackBreadthIsMaxContent || m_maxTrackBreadthIsAuto; }
bool hasMinContentMaxTrackBreadth() const { return m_maxTrackBreadthIsMinContent; }
bool hasMinOrMaxContentMaxTrackBreadth() const { return m_maxTrackBreadthIsMaxContent || m_maxTrackBreadthIsMinContent; }
bool hasMaxContentMinTrackBreadth() const { return m_minTrackBreadthIsMaxContent; }
bool hasMinContentMinTrackBreadth() const { return m_minTrackBreadthIsMinContent; }
bool hasMaxContentMinTrackBreadthAndMaxContentMaxTrackBreadth() const { return m_minTrackBreadthIsMaxContent && m_maxTrackBreadthIsMaxContent; }
bool hasAutoOrMinContentMinTrackBreadthAndIntrinsicMaxTrackBreadth() const { return (m_minTrackBreadthIsMinContent || m_minTrackBreadthIsAuto) && m_maxTrackBreadthIsIntrinsic; }
bool hasFixedMaxTrackBreadth() const { return m_maxTrackBreadthIsFixed; }
private:
GridTrackSizeType m_type;
GridLength m_minTrackBreadth;
GridLength m_maxTrackBreadth;
GridLength m_fitContentTrackBreadth;
bool m_minTrackBreadthIsAuto : 1;
bool m_maxTrackBreadthIsAuto : 1;
bool m_minTrackBreadthIsMaxContent : 1;
bool m_minTrackBreadthIsMinContent : 1;
bool m_maxTrackBreadthIsMaxContent : 1;
bool m_maxTrackBreadthIsMinContent : 1;
bool m_minTrackBreadthIsIntrinsic : 1;
bool m_maxTrackBreadthIsIntrinsic : 1;
bool m_maxTrackBreadthIsFixed : 1;
};
WTF::TextStream& operator<<(WTF::TextStream&, const GridTrackSize&);
} // namespace WebCore