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/*
* Copyright (C) 2019-2021 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. ``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.
*/
#pragma once
#include "CSSPropertyParser.h"
#include "ComputedStyleExtractor.h"
#include "SVGAttributeAnimator.h"
#include "SVGElement.h"
namespace WebCore {
template<typename AnimationFunction>
class SVGPropertyAnimator : public SVGAttributeAnimator {
public:
bool isDiscrete() const override { return m_function.isDiscrete(); }
void setFromAndToValues(SVGElement& targetElement, const String& from, const String& to) override
{
m_function.setFromAndToValues(targetElement, adjustForInheritance(targetElement, from), adjustForInheritance(targetElement, to));
}
void setFromAndByValues(SVGElement& targetElement, const String& from, const String& by) override
{
m_function.setFromAndByValues(targetElement, from, by);
}
void setToAtEndOfDurationValue(const String& toAtEndOfDuration) override
{
m_function.setToAtEndOfDurationValue(toAtEndOfDuration);
}
protected:
template<typename... Arguments>
SVGPropertyAnimator(const QualifiedName& attributeName, Arguments&&... arguments)
: SVGAttributeAnimator(attributeName)
, m_function(std::forward<Arguments>(arguments)...)
{
}
void stop(SVGElement& targetElement) override
{
removeAnimatedStyleProperty(targetElement);
}
std::optional<float> calculateDistance(SVGElement& targetElement, const String& from, const String& to) const override
{
return m_function.calculateDistance(targetElement, from, to);
}
String adjustForInheritance(SVGElement& targetElement, const String& value) const
{
static MainThreadNeverDestroyed<const AtomString> inherit("inherit"_s);
return value == inherit ? computeInheritedCSSPropertyValue(targetElement) : value;
}
String computeCSSPropertyValue(SVGElement& targetElement, CSSPropertyID id) const
{
Ref protector = targetElement;
// Don't include any properties resulting from CSS Transitions/Animations or SMIL animations, as we want to retrieve the "base value".
targetElement.setUseOverrideComputedStyle(true);
RefPtr<CSSValue> value = ComputedStyleExtractor(&targetElement).propertyValue(id);
targetElement.setUseOverrideComputedStyle(false);
return value ? value->cssText() : String();
}
String computeInheritedCSSPropertyValue(SVGElement& targetElement) const
{
RefPtr<Element> parent = targetElement.parentElement();
if (!parent || !parent->isSVGElement())
return emptyString();
SVGElement& svgParent = downcast<SVGElement>(*parent);
return computeCSSPropertyValue(svgParent, cssPropertyID(m_attributeName.localName()));
}
AnimationFunction m_function;
};
} // namespace WebCore
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