Index: third_party/WebKit/Source/core/animation/TransitionInterpolation.cpp |
diff --git a/third_party/WebKit/Source/core/animation/TransitionInterpolation.cpp b/third_party/WebKit/Source/core/animation/TransitionInterpolation.cpp |
new file mode 100644 |
index 0000000000000000000000000000000000000000..7bb4384b6b19be7b61f0aff0c2a53170ea778794 |
--- /dev/null |
+++ b/third_party/WebKit/Source/core/animation/TransitionInterpolation.cpp |
@@ -0,0 +1,67 @@ |
+// Copyright 2017 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/TransitionInterpolation.h" |
+ |
+#include "core/animation/CSSInterpolationTypesMap.h" |
+#include "core/animation/InterpolationEnvironment.h" |
+#include "core/animation/InterpolationType.h" |
+#include "core/css/resolver/StyleResolverState.h" |
+ |
+namespace blink { |
+ |
+void TransitionInterpolation::interpolate(int iteration, double fraction) { |
+ if (m_cachedFraction != fraction || m_cachedIteration != iteration) { |
+ if (fraction != 0 && fraction != 1) { |
+ m_merge.startInterpolableValue->interpolate( |
+ *m_merge.endInterpolableValue, fraction, *m_cachedInterpolableValue); |
+ } |
+ m_cachedIteration = iteration; |
+ m_cachedFraction = fraction; |
+ } |
+} |
+ |
+const InterpolableValue& TransitionInterpolation::currentInterpolableValue() |
+ const { |
+ if (m_cachedFraction == 0) { |
+ return *m_start.interpolableValue; |
+ } |
+ if (m_cachedFraction == 1) { |
+ return *m_end.interpolableValue; |
+ } |
+ return *m_cachedInterpolableValue; |
+} |
+ |
+NonInterpolableValue* TransitionInterpolation::currentNonInterpolableValue() |
+ const { |
+ if (m_cachedFraction == 0) { |
+ return m_start.nonInterpolableValue.get(); |
+ } |
+ if (m_cachedFraction == 1) { |
+ return m_end.nonInterpolableValue.get(); |
+ } |
+ return m_merge.nonInterpolableValue.get(); |
+} |
+ |
+void TransitionInterpolation::apply(StyleResolverState& state) const { |
+ CSSInterpolationTypesMap map(state.document().propertyRegistry()); |
+ InterpolationEnvironment environment(map, state); |
+ m_type.apply(currentInterpolableValue(), currentNonInterpolableValue(), |
+ environment); |
+} |
+ |
+std::unique_ptr<TypedInterpolationValue> |
+TransitionInterpolation::getInterpolatedValue() const { |
+ return TypedInterpolationValue::create(m_type, |
+ currentInterpolableValue().clone(), |
+ currentNonInterpolableValue()); |
+} |
+ |
+RefPtr<AnimatableValue> |
+TransitionInterpolation::getInterpolatedCompositorValue() const { |
+ return AnimatableValue::interpolate(m_compositorStart.get(), |
+ m_compositorEnd.get(), m_cachedFraction); |
+} |
+ |
+} // namespace blink |