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/*
* 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 THIRD_PARTY_BLINK_RENDERER_CORE_STYLE_GRID_LENGTH_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_STYLE_GRID_LENGTH_H_
#include "third_party/blink/renderer/platform/geometry/length.h"
#include "third_party/blink/renderer/platform/wtf/allocator.h"
namespace blink {
// This class wraps the <track-breadth> which can be either a <percentage>,
// <length>, min-content, max-content or <flex>. This class avoids spreading the
// knowledge of <flex> throughout the layout directory by adding an new unit to
// Length.h.
class GridLength {
DISALLOW_NEW();
public:
GridLength(const Length& length)
: length_(length), flex_(0), type_(kLengthType) {}
explicit GridLength(double flex) : flex_(flex), type_(kFlexType) {}
bool IsLength() const { return type_ == kLengthType; }
bool IsFlex() const { return type_ == kFlexType; }
const Length& length() const {
DCHECK(IsLength());
return length_;
}
double Flex() const {
DCHECK(IsFlex());
return flex_;
}
bool HasPercentage() const {
return type_ == kLengthType && length_.IsPercentOrCalc();
}
bool operator==(const GridLength& o) const {
return length_ == o.length_ && flex_ == o.flex_ && type_ == o.type_;
}
bool IsContentSized() const {
return type_ == kLengthType &&
(length_.IsAuto() || length_.IsMinContent() ||
length_.IsMaxContent());
}
bool IsAuto() const { return type_ == kLengthType && length_.IsAuto(); }
private:
// Ideally we would put the 2 following fields in a union, but Length has a
// constructor, a destructor and a copy assignment which isn't allowed.
Length length_;
double flex_;
enum GridLengthType { kLengthType, kFlexType };
GridLengthType type_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_STYLE_GRID_LENGTH_H_
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