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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,
* 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 "StyleLineWidth.h"
#include "CSSPrimitiveValue.h"
#include "RenderStyleInlines.h"
#include "StyleBuilderChecking.h"
#include "StylePrimitiveNumericTypes+CSSValueConversion.h"
#include "StylePrimitiveNumericTypes+Evaluation.h"
#include "StylePrimitiveNumericTypes+Serialization.h"
namespace WebCore {
namespace Style {
// MARK: - Conversion
static auto handleKeywordValue(BuilderState& state, CSSValueID valueID) -> LineWidth
{
float keywordValue;
switch (valueID) {
case CSSValueThin:
keywordValue = 1.0f;
break;
case CSSValueMedium:
keywordValue = 3.0f;
break;
case CSSValueThick:
keywordValue = 5.0f;
break;
default:
state.setCurrentPropertyInvalidAtComputedValueTime();
keywordValue = 3.0f; // Medium
break;
}
return LineWidth::Length { floorToDevicePixel(keywordValue * state.style().usedZoom(), state.document().deviceScaleFactor()) };
}
auto CSSValueConversion<LineWidth>::operator()(BuilderState& state, const CSSValue& value) -> LineWidth
{
RefPtr primitiveValue = requiredDowncast<CSSPrimitiveValue>(state, value);
if (!primitiveValue)
return LineWidth::Length { 3.0f };
if (primitiveValue->isValueID())
return handleKeywordValue(state, primitiveValue->valueID());
// Any original result that was >= 1 should not be allowed to fall below 1. This keeps border lines from vanishing.
auto result = primitiveValue->resolveAsLength<float>(state.cssToLengthConversionData());
if (state.style().usedZoom() < 1.0f && result < 1.0f) {
auto originalLength = primitiveValue->resolveAsLength<float>(state.cssToLengthConversionData().copyWithAdjustedZoom(1.0));
if (originalLength >= 1.0f)
return LineWidth::Length { 1.0f };
}
if (auto minimumLineWidth = 1.0f / state.document().deviceScaleFactor(); result > 0.0f && result < minimumLineWidth)
return LineWidth::Length { minimumLineWidth };
return LineWidth::Length { floorToDevicePixel(result, state.document().deviceScaleFactor()) };
}
// MARK: - Evaluate
auto Evaluation<LineWidthBox, FloatBoxExtent>::operator()(const LineWidthBox& value, ZoomNeeded zoom) -> FloatBoxExtent
{
return {
evaluate<float>(value.top(), zoom),
evaluate<float>(value.right(), zoom),
evaluate<float>(value.bottom(), zoom),
evaluate<float>(value.left(), zoom),
};
}
auto Evaluation<LineWidthBox, LayoutBoxExtent>::operator()(const LineWidthBox& value, ZoomNeeded zoom) -> LayoutBoxExtent
{
return {
evaluate<LayoutUnit>(value.top(), zoom),
evaluate<LayoutUnit>(value.right(), zoom),
evaluate<LayoutUnit>(value.bottom(), zoom),
evaluate<LayoutUnit>(value.left(), zoom),
};
}
} // namespace Style
} // namespace WebCore
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