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// Copyright 2021 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/interpolable_aspect_ratio.h"
#include "third_party/blink/renderer/core/animation/interpolable_value.h"
#include "third_party/blink/renderer/core/css/resolver/style_resolver_state.h"
#include "third_party/blink/renderer/core/style/style_aspect_ratio.h"
#include "third_party/blink/renderer/platform/runtime_enabled_features.h"
namespace blink {
// static
std::unique_ptr<InterpolableAspectRatio> InterpolableAspectRatio::MaybeCreate(
const StyleAspectRatio& aspect_ratio) {
if (!RuntimeEnabledFeatures::CSSAspectRatioInterpolationEnabled())
return nullptr;
// Auto aspect ratio cannot be interpolated to / from.
if (aspect_ratio.IsAuto())
return nullptr;
return std::make_unique<InterpolableAspectRatio>(aspect_ratio.GetRatio());
}
InterpolableAspectRatio::InterpolableAspectRatio(
const FloatSize& aspect_ratio) {
// The StyleAspectRatio::IsAuto check in MaybeCreate should return true if we
// have a degenerate aspect ratio.
DCHECK(aspect_ratio.Height() > 0 && aspect_ratio.Width() > 0);
value_ = std::make_unique<InterpolableNumber>(
log(aspect_ratio.Width() / aspect_ratio.Height()));
}
FloatSize InterpolableAspectRatio::GetRatio() const {
return FloatSize(exp(To<InterpolableNumber>(*value_).Value()), 1);
}
void InterpolableAspectRatio::Scale(double scale) {
value_->Scale(scale);
}
void InterpolableAspectRatio::Add(const InterpolableValue& other) {
value_->Add(*To<InterpolableAspectRatio>(other).value_);
}
void InterpolableAspectRatio::AssertCanInterpolateWith(
const InterpolableValue& other) const {
const InterpolableAspectRatio& other_aspect_ratio =
To<InterpolableAspectRatio>(other);
value_->AssertCanInterpolateWith(*other_aspect_ratio.value_);
}
void InterpolableAspectRatio::Interpolate(const InterpolableValue& to,
const double progress,
InterpolableValue& result) const {
const InterpolableAspectRatio& aspect_ratio_to =
To<InterpolableAspectRatio>(to);
InterpolableAspectRatio& aspect_ratio_result =
To<InterpolableAspectRatio>(result);
value_->Interpolate(*aspect_ratio_to.value_, progress,
*aspect_ratio_result.value_);
}
} // namespace blink
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