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/*
* Copyright (C) 2025 Samuel Weinig <sam@webkit.org>
*
* 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. ``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
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* 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 {
class CSSToLengthConversionData;
class FontCascade;
class RenderStyle;
class RenderView;
enum CSSPropertyID : uint16_t;
namespace CSS {
enum class LengthUnit : uint8_t;
}
namespace Style {
// FIXME: These functions have odd names and invariants and could use improvements.
// NOTE: `computeUnzoomedNonCalcLengthDouble` has the following restrictions:
//
// It can never be called with the following LengthUnits:
// Lh, Rlh, Cqw, Cqh, Cqi, Cqb, Cqmin, Cqmax (line height, and container-percentage units)
//
// If `fontCascadeForUnit` is nullptr, it additionally cannot be called with the following LengthUnits:
// Em, QuirkyEm, Ex, Cap, Ch, Ic, Rca, Rc, Re, Re, Ri (font and root font dependent units)
//
// If `RenderView` is nullptr, the following LengthUnits will all cause a return value of zero:
// Vw, Vh, Vmin, Vmax, Vb, Vi, Svw, Svh, Svmin, Svmax, Svb, Svi, Lvw, Lvh, Lvmin, Lvmax, Lvb, Lvi, Dvw, Dvh, Dvmin, Dvmax, Dvb, Dvi (viewport-percentage units)
double computeUnzoomedNonCalcLengthDouble(double value, CSS::LengthUnit, CSSPropertyID, const FontCascade* fontCascadeForUnit = nullptr, const RenderView* = nullptr);
double computeNonCalcLengthDouble(double value, CSS::LengthUnit, const CSSToLengthConversionData&);
// True if `computeNonCalcLengthDouble` would produce identical results when resolved against both these styles.
bool equalForLengthResolution(const RenderStyle&, const RenderStyle&);
} // namespace Style
} // namespace WebCore
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