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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
namespace WebCore {
// A span in a single direction (either rows or columns). Note that |startLine|
// and |endLine| are grid lines' indexes.
// Despite line numbers in the spec start in "1", the indexes here start in "0".
class GridSpan {
public:
static GridSpan untranslatedDefiniteGridSpan(int startLine, int endLine);
static GridSpan translatedDefiniteGridSpan(unsigned startLine, unsigned endLine);
static GridSpan indefiniteGridSpan();
static GridSpan masonryAxisTranslatedDefiniteGridSpan();
friend bool operator==(const GridSpan&, const GridSpan&) = default;
unsigned integerSpan() const;
int untranslatedStartLine() const;
int untranslatedEndLine() const;
unsigned startLine() const;
unsigned endLine() const;
struct GridSpanIterator {
GridSpanIterator(unsigned value)
: value(value)
{
}
operator unsigned&() { return value; }
unsigned operator*() const { return value; }
unsigned value;
};
GridSpanIterator begin() const;
GridSpanIterator end() const;
bool isTranslatedDefinite() const;
bool isIndefinite() const;
void translate(unsigned offset);
// 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 translateTo(const GridSpan& parent, bool reverse);
void clamp(int max);
bool clamp(int min, int max);
private:
enum GridSpanType { UntranslatedDefinite, TranslatedDefinite, Indefinite };
GridSpan(int startLine, int endLine, GridSpanType);
int m_startLine;
int m_endLine;
GridSpanType m_type;
};
}
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