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/*
* Copyright (C) 2025 Apple 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:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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 "LayoutUnit.h"
#include <wtf/text/TextStream.h>
namespace WebCore {
// This is basically a 1-dimentional LayoutRect.
class LayoutRange {
public:
LayoutRange() = default;
LayoutRange(LayoutUnit location, LayoutUnit size)
: m_location(location)
, m_size(size)
{ }
LayoutUnit min() const { return m_location; }
LayoutUnit max() const { return m_location + m_size; }
LayoutUnit size() const { return m_size; }
inline void set(LayoutUnit location, LayoutUnit size);
inline void reset(LayoutUnit size = 0_lu)
{
m_location = 0_lu;
m_size = size;
}
void moveBy(LayoutUnit shift) { m_location += shift; }
void moveTo(LayoutUnit target) { m_location = target; }
inline void shiftMinEdgeBy(LayoutUnit shift);
inline void shiftMaxEdgeBy(LayoutUnit shift);
inline void shiftMinEdgeTo(LayoutUnit target);
inline void shiftMaxEdgeTo(LayoutUnit target);
inline void sizeFromMinEdge(LayoutUnit size = 0_lu);
inline void sizeFromMaxEdge(LayoutUnit size = 0_lu);
inline void floorMinEdgeTo(LayoutUnit target);
inline void floorMaxEdgeTo(LayoutUnit target);
inline void capMinEdgeTo(LayoutUnit target);
inline void capMaxEdgeTo(LayoutUnit target);
inline void floorSizeFromMinEdge(LayoutUnit size = 0_lu);
inline void floorSizeFromMaxEdge(LayoutUnit size = 0_lu);
private:
LayoutUnit m_location;
LayoutUnit m_size;
};
// MARK: - Implementation
inline void LayoutRange::set(LayoutUnit location, LayoutUnit size)
{
m_location = location;
m_size = size;
}
inline void LayoutRange::shiftMinEdgeBy(LayoutUnit shift)
{
m_location += shift;
m_size -= shift;
}
inline void LayoutRange::shiftMaxEdgeBy(LayoutUnit shift)
{
m_size += shift;
}
inline void LayoutRange::shiftMinEdgeTo(LayoutUnit target) { shiftMinEdgeBy(target - min()); }
inline void LayoutRange::shiftMaxEdgeTo(LayoutUnit target) { shiftMaxEdgeBy(target - max()); }
inline void LayoutRange::floorMinEdgeTo(LayoutUnit target)
{
if (target > max())
shiftMaxEdgeTo(target);
}
inline void LayoutRange::floorMaxEdgeTo(LayoutUnit target)
{
if (target > max())
shiftMaxEdgeTo(target);
}
inline void LayoutRange::capMinEdgeTo(LayoutUnit target)
{
if (target < min())
shiftMinEdgeTo(target);
}
inline void LayoutRange::capMaxEdgeTo(LayoutUnit target)
{
if (target < max())
shiftMaxEdgeTo(target);
}
inline void LayoutRange::sizeFromMinEdge(LayoutUnit size)
{
m_size = size;
}
inline void LayoutRange::sizeFromMaxEdge(LayoutUnit size)
{
m_location -= size - m_size;
m_size = size;
}
inline void LayoutRange::floorSizeFromMinEdge(LayoutUnit size)
{
m_size = std::max(m_size, size);
}
inline void LayoutRange::floorSizeFromMaxEdge(LayoutUnit size)
{
if (size > m_size)
sizeFromMaxEdge(size);
}
inline TextStream& operator<<(TextStream& stream, const LayoutRange& range)
{
if (stream.hasFormattingFlag(TextStream::Formatting::LayoutUnitsAsIntegers))
return stream << '[' << range.min().toInt() << ',' << range.max().toInt() << ']';
return stream << '[' << range.min().toFloat() << ',' << range.max().toFloat() << ']';
}
} // namespace WebCore
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