Web Animations: Animate d presentation attribute using InterpolableValue

third_party/WebKit/Source/core/animation/CSSPathInterpolationType.cpp

Index: third_party/WebKit/Source/core/animation/CSSPathInterpolationType.cpp
diff --git a/third_party/WebKit/Source/core/animation/CSSPathInterpolationType.cpp b/third_party/WebKit/Source/core/animation/CSSPathInterpolationType.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..02997229ce474c8d47b47e28ba014aabf45ba1d6
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+++ b/third_party/WebKit/Source/core/animation/CSSPathInterpolationType.cpp
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+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "core/animation/CSSPathInterpolationType.h"
+
+#include "core/animation/PathInterpolationFunctions.h"
+#include "core/css/CSSPathValue.h"
+#include "core/css/resolver/StyleResolverState.h"
+
+namespace blink {
+
+void CSSPathInterpolationType::apply(const InterpolableValue& interpolableValue, const NonInterpolableValue* nonInterpolableValue, InterpolationEnvironment& environment) const
+{
+    ASSERT(cssProperty() == CSSPropertyD);
+    environment.state().style()->setD(StylePath::create(PathInterpolationFunctions::appliedValue(interpolableValue, nonInterpolableValue)));
+}
+
+void CSSPathInterpolationType::composite(UnderlyingValue& underlyingValue, double underlyingFraction, const InterpolationValue& value) const
+{
+    PathInterpolationFunctions::composite(underlyingValue, underlyingFraction, value);
+}
+
+PassOwnPtr<InterpolationValue> CSSPathInterpolationType::maybeConvertNeutral(const UnderlyingValue& underlyingValue, ConversionCheckers& conversionCheckers) const
+{
+    return PathInterpolationFunctions::maybeConvertNeutral(*this, underlyingValue, conversionCheckers);
+}
+
+PassOwnPtr<InterpolationValue> CSSPathInterpolationType::maybeConvertInitial() const
+{
+    return PathInterpolationFunctions::convertValue(*this, CSSPathValue::emptyPathValue()->byteStream());
+}
+
+class ParentPathChecker : public InterpolationType::ConversionChecker {
+public:
+    static PassOwnPtr<ParentPathChecker> create(const InterpolationType& type, PassRefPtr<StylePath> stylePath)
+    {
+        return adoptPtr(new ParentPathChecker(type, stylePath));
+    }
+
+private:
+    ParentPathChecker(const InterpolationType& type, PassRefPtr<StylePath> stylePath)
+        : ConversionChecker(type)
+        , m_stylePath(stylePath)
+    { }
+
+    bool isValid(const InterpolationEnvironment& environment, const UnderlyingValue&) const final
+    {
+        return environment.state().parentStyle()->svgStyle().d() == m_stylePath.get();
+    }
+
+    const RefPtr<StylePath> m_stylePath;
+};
+
+PassOwnPtr<InterpolationValue> CSSPathInterpolationType::maybeConvertInherit(const StyleResolverState& state, ConversionCheckers& conversionCheckers) const
+{
+    ASSERT(cssProperty() == CSSPropertyD);
+    if (!state.parentStyle())
+        return nullptr;
+
+    conversionCheckers.append(ParentPathChecker::create(*this, state.parentStyle()->svgStyle().d()));
+    return PathInterpolationFunctions::convertValue(*this, state.parentStyle()->svgStyle().d()->byteStream());
+}
+
+PassOwnPtr<InterpolationValue> CSSPathInterpolationType::maybeConvertValue(const CSSValue& value, const StyleResolverState& state, ConversionCheckers& conversionCheckers) const
+{
+    return PathInterpolationFunctions::convertValue(*this, toCSSPathValue(value).byteStream());
+}
+
+PassOwnPtr<InterpolationValue> CSSPathInterpolationType::maybeConvertUnderlyingValue(const InterpolationEnvironment& environment) const
+{
+    ASSERT(cssProperty() == CSSPropertyD);
+    return PathInterpolationFunctions::convertValue(*this, environment.state().style()->svgStyle().d()->byteStream());
+}
+
+PassOwnPtr<PairwisePrimitiveInterpolation> CSSPathInterpolationType::mergeSingleConversions(InterpolationValue& startValue, InterpolationValue& endValue) const
+{
+    return PathInterpolationFunctions::mergeSingleConversions(*this, startValue, endValue);
+}
+
+} // namespace blink