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// 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 "third_party/blink/renderer/core/animation/transition_interpolation.h"
#include "third_party/blink/renderer/core/animation/css_interpolation_types_map.h"
#include "third_party/blink/renderer/core/animation/interpolation_environment.h"
#include "third_party/blink/renderer/core/animation/interpolation_type.h"
#include "third_party/blink/renderer/core/css/resolver/style_resolver_state.h"
#include "third_party/blink/renderer/platform/runtime_enabled_features.h"
namespace blink {
void TransitionInterpolation::Interpolate(int iteration, double fraction) {
if (cached_fraction_ != fraction || cached_iteration_ != iteration) {
if (fraction != 0 && fraction != 1) {
merge_.start_interpolable_value->Interpolate(
*merge_.end_interpolable_value, fraction,
*cached_interpolable_value_);
}
cached_iteration_ = iteration;
cached_fraction_ = fraction;
}
}
const InterpolableValue& TransitionInterpolation::CurrentInterpolableValue()
const {
if (cached_fraction_ == 0) {
return *start_.interpolable_value;
}
if (cached_fraction_ == 1) {
return *end_.interpolable_value;
}
return *cached_interpolable_value_;
}
const NonInterpolableValue*
TransitionInterpolation::CurrentNonInterpolableValue() const {
if (cached_fraction_ == 0) {
return start_.non_interpolable_value.get();
}
if (cached_fraction_ == 1) {
return end_.non_interpolable_value.get();
}
return merge_.non_interpolable_value.get();
}
void TransitionInterpolation::Apply(StyleResolverState& state) const {
CSSInterpolationTypesMap map(state.GetDocument().GetPropertyRegistry(),
state.GetDocument());
CSSInterpolationEnvironment environment(map, state, nullptr, nullptr);
type_.Apply(CurrentInterpolableValue(), CurrentNonInterpolableValue(),
environment);
}
std::unique_ptr<TypedInterpolationValue>
TransitionInterpolation::GetInterpolatedValue() const {
return std::make_unique<TypedInterpolationValue>(
type_, CurrentInterpolableValue().Clone(), CurrentNonInterpolableValue());
}
} // namespace blink
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