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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.
*/
#include "config.h"
#include "StyleSVGPaint.h"
#include "AnimationUtilities.h"
#include "CSSURLValue.h"
#include "RenderStyle.h"
#include "StyleBuilderChecking.h"
#include "StyleForVisitedLink.h"
namespace WebCore {
namespace Style {
bool containsCurrentColor(const Style::SVGPaint& paint)
{
if (auto color = paint.tryAnyColor())
return color->containsCurrentColor();
return false;
}
// MARK: - Conversion
auto CSSValueConversion<SVGPaint>::operator()(BuilderState& state, const CSSValue& value, ForVisitedLink forVisitedLink) -> SVGPaint
{
if (RefPtr list = dynamicDowncast<CSSValueList>(value)) {
RefPtr firstValue = list->item(0);
RefPtr urlValue = requiredDowncast<CSSURLValue>(state, *firstValue);
if (!urlValue)
return CSS::Keyword::None { };
auto url = toStyle(urlValue->url(), state);
if (list->size() == 1)
return url;
RefPtr secondItem = list->item(1);
if (RefPtr primitiveValue = dynamicDowncast<const CSSPrimitiveValue>(secondItem)) {
switch (primitiveValue->valueID()) {
case CSSValueNone:
return SVGPaint::URLNone { url, CSS::Keyword::None { } };
case CSSValueCurrentcolor:
state.style().setDisallowsFastPathInheritance();
return SVGPaint::URLColor { url, Color::currentColor() };
default:
break;
}
}
return SVGPaint::URLColor { url, toStyleFromCSSValue<Color>(state, *list->protectedItem(1), forVisitedLink) };
}
if (RefPtr urlValue = dynamicDowncast<CSSURLValue>(value))
return toStyle(urlValue->url(), state);
if (RefPtr primitiveValue = dynamicDowncast<CSSPrimitiveValue>(value)) {
switch (primitiveValue->valueID()) {
case CSSValueNone:
return CSS::Keyword::None { };
case CSSValueCurrentcolor:
state.style().setDisallowsFastPathInheritance();
return Color { Color::currentColor() };
default:
break;
}
}
return toStyleFromCSSValue<Color>(state, value, forVisitedLink);
}
// MARK: - Blending
auto Blending<SVGPaint>::equals(const SVGPaint& a, const SVGPaint& b, const RenderStyle& aStyle, const RenderStyle& bStyle) -> bool
{
if (!a.hasSameType(b))
return false;
// We only support animations between SVGPaints that are pure Color values.
// For everything else we must return true for this method, otherwise
// we will try to animate between values forever.
if (a.isColor())
return equalsForBlending(a.colorDisregardingType(), b.colorDisregardingType(), aStyle, bStyle);
return true;
}
auto Blending<SVGPaint>::canBlend(const SVGPaint& a, const SVGPaint& b) -> bool
{
if (!a.isColor() || !b.isColor())
return false;
return Style::canBlend(a.colorDisregardingType(), b.colorDisregardingType());
}
auto Blending<SVGPaint>::blend(const SVGPaint& a, const SVGPaint& b, const RenderStyle& aStyle, const RenderStyle& bStyle, const BlendingContext& context) -> SVGPaint
{
if (context.isDiscrete) {
ASSERT(!context.progress || context.progress == 1);
return context.progress ? b : a;
}
return Style::blend(a.colorDisregardingType(), b.colorDisregardingType(), aStyle, bStyle, context);
}
} // namespace Style
} // namespace WebCore
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