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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.
*/
#include "config.h"
#include "GridSpan.h"
#include "StyleGridPosition.h"
namespace WebCore {
GridSpan GridSpan::untranslatedDefiniteGridSpan(int startLine, int endLine)
{
return GridSpan(startLine, endLine, UntranslatedDefinite);
}
GridSpan GridSpan::translatedDefiniteGridSpan(unsigned startLine, unsigned endLine)
{
return GridSpan(startLine, endLine, TranslatedDefinite);
}
GridSpan GridSpan::indefiniteGridSpan()
{
return GridSpan(0, 1, Indefinite);
}
GridSpan GridSpan::masonryAxisTranslatedDefiniteGridSpan()
{
return GridSpan(0, 1, TranslatedDefinite);
}
unsigned GridSpan::integerSpan() const
{
ASSERT(!isIndefinite());
return m_endLine - m_startLine;
}
int GridSpan::untranslatedStartLine() const
{
ASSERT(m_type == UntranslatedDefinite);
return m_startLine;
}
int GridSpan::untranslatedEndLine() const
{
ASSERT(m_type == UntranslatedDefinite);
return m_endLine;
}
unsigned GridSpan::startLine() const
{
ASSERT(isTranslatedDefinite());
ASSERT(m_endLine >= 0);
return m_startLine;
}
unsigned GridSpan::endLine() const
{
ASSERT(isTranslatedDefinite());
ASSERT(m_endLine > 0);
return m_endLine;
}
GridSpan::GridSpanIterator GridSpan::begin() const
{
ASSERT(isTranslatedDefinite());
return m_startLine;
}
GridSpan::GridSpanIterator GridSpan::end() const
{
ASSERT(isTranslatedDefinite());
return m_endLine;
}
bool GridSpan::isTranslatedDefinite() const
{
return m_type == TranslatedDefinite;
}
bool GridSpan::isIndefinite() const
{
return m_type == Indefinite;
}
void GridSpan::translate(unsigned offset)
{
ASSERT(m_type == UntranslatedDefinite);
m_type = TranslatedDefinite;
m_startLine += offset;
m_endLine += offset;
ASSERT(m_startLine >= 0);
ASSERT(m_endLine > 0);
}
// Moves this span to be in the same coordinate space as |parent|.
// If reverse is specified, then swaps the direction to handle RTL/LTR changes.
void GridSpan::translateTo(const GridSpan& parent, bool reverse)
{
ASSERT(m_type == TranslatedDefinite);
ASSERT(parent.m_type == TranslatedDefinite);
if (reverse) {
int start = m_startLine;
m_startLine = parent.endLine() - m_endLine;
m_endLine = parent.endLine() - start;
} else {
m_startLine += parent.m_startLine;
m_endLine += parent.m_startLine;
}
}
void GridSpan::clamp(int max)
{
ASSERT(m_type != Indefinite);
m_startLine = std::max(m_startLine, 0);
m_endLine = std::max(std::min(m_endLine, max), 1);
if (m_startLine >= m_endLine)
m_startLine = m_endLine - 1;
}
bool GridSpan::clamp(int min, int max)
{
ASSERT(min < max);
ASSERT(m_startLine < m_endLine);
ASSERT(m_type != Indefinite);
if (min >= m_endLine || max <= m_startLine)
return false;
m_startLine = std::max(m_startLine, min);
m_endLine = std::min(m_endLine, max);
ASSERT(m_startLine < m_endLine);
return true;
}
GridSpan::GridSpan(int startLine, int endLine, GridSpanType type)
: m_type(type)
{
#if ASSERT_ENABLED
ASSERT(startLine < endLine);
if (type == TranslatedDefinite) {
ASSERT(startLine >= 0);
ASSERT(endLine > 0);
}
#endif
m_startLine = std::max(Style::GridPosition::min(), std::min(startLine, Style::GridPosition::max() - 1));
m_endLine = std::max(Style::GridPosition::min() + 1, std::min(endLine, Style::GridPosition::max()));
}
}
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