104 lines
4.1 KiB
C++
104 lines
4.1 KiB
C++
/*
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* Copyright (C) 2019-2021 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "CSSComputedStyleDeclaration.h"
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#include "CSSPropertyParser.h"
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#include "SVGAttributeAnimator.h"
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#include "SVGElement.h"
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namespace WebCore {
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template<typename AnimationFunction>
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class SVGPropertyAnimator : public SVGAttributeAnimator {
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public:
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bool isDiscrete() const override { return m_function.isDiscrete(); }
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void setFromAndToValues(SVGElement& targetElement, const String& from, const String& to) override
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{
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m_function.setFromAndToValues(targetElement, adjustForInheritance(targetElement, from), adjustForInheritance(targetElement, to));
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}
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void setFromAndByValues(SVGElement& targetElement, const String& from, const String& by) override
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{
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m_function.setFromAndByValues(targetElement, from, by);
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}
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void setToAtEndOfDurationValue(const String& toAtEndOfDuration) override
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{
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m_function.setToAtEndOfDurationValue(toAtEndOfDuration);
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}
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protected:
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template<typename... Arguments>
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SVGPropertyAnimator(const QualifiedName& attributeName, Arguments&&... arguments)
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: SVGAttributeAnimator(attributeName)
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, m_function(std::forward<Arguments>(arguments)...)
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{
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}
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void stop(SVGElement& targetElement) override
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{
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removeAnimatedStyleProperty(targetElement);
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}
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std::optional<float> calculateDistance(SVGElement& targetElement, const String& from, const String& to) const override
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{
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return m_function.calculateDistance(targetElement, from, to);
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}
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String adjustForInheritance(SVGElement& targetElement, const String& value) const
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{
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static MainThreadNeverDestroyed<const AtomString> inherit("inherit", AtomString::ConstructFromLiteral);
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return value == inherit ? computeInheritedCSSPropertyValue(targetElement) : value;
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}
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String computeCSSPropertyValue(SVGElement& targetElement, CSSPropertyID id) const
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{
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auto protector = makeRefPtr(targetElement);
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// Don't include any properties resulting from CSS Transitions/Animations or SMIL animations, as we want to retrieve the "base value".
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targetElement.setUseOverrideComputedStyle(true);
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RefPtr<CSSValue> value = ComputedStyleExtractor(&targetElement).propertyValue(id);
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targetElement.setUseOverrideComputedStyle(false);
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return value ? value->cssText() : String();
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}
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String computeInheritedCSSPropertyValue(SVGElement& targetElement) const
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{
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auto parent = makeRefPtr(targetElement.parentElement());
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if (!parent || !parent->isSVGElement())
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return emptyString();
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SVGElement& svgParent = downcast<SVGElement>(*parent);
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return computeCSSPropertyValue(svgParent, cssPropertyID(m_attributeName.localName()));
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}
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AnimationFunction m_function;
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};
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} // namespace WebCore
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