| /* |
| * Copyright (C) 2019 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 "CSSComputedStyleDeclaration.h" |
| #include "CSSPropertyParser.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); |
| } |
| |
| 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", AtomString::ConstructFromLiteral); |
| return value == inherit ? computeInheritedCSSPropertyValue(targetElement) : value; |
| } |
| |
| String computeCSSPropertyValue(SVGElement* targetElement, CSSPropertyID id) const |
| { |
| ASSERT(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 |
| { |
| ASSERT(targetElement); |
| auto parent = makeRefPtr(targetElement->parentElement()); |
| if (!parent || !parent->isSVGElement()) |
| return emptyString(); |
| |
| SVGElement& svgParent = downcast<SVGElement>(*parent); |
| return computeCSSPropertyValue(&svgParent, cssPropertyID(m_attributeName.localName())); |
| } |
| |
| AnimationFunction m_function; |
| }; |
| |
| } |