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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 "third_party/blink/renderer/core/animation/css_position_axis_list_interpolation_type.h"
#include "third_party/blink/renderer/core/animation/interpolable_length.h"
#include "third_party/blink/renderer/core/animation/list_interpolation_functions.h"
#include "third_party/blink/renderer/core/css/css_identifier_value.h"
#include "third_party/blink/renderer/core/css/css_value_list.h"
#include "third_party/blink/renderer/core/css/css_value_pair.h"
namespace blink {
InterpolationValue
CSSPositionAxisListInterpolationType::ConvertPositionAxisCSSValue(
const CSSValue& value) {
if (const auto* pair = DynamicTo<CSSValuePair>(value)) {
InterpolationValue result(
InterpolableLength::MaybeConvertCSSValue(pair->Second()));
CSSValueID side = To<CSSIdentifierValue>(pair->First()).GetValueID();
if (side == CSSValueID::kRight || side == CSSValueID::kBottom) {
To<InterpolableLength>(*result.interpolable_value)
.SubtractFromOneHundredPercent();
}
return result;
}
if (value.IsPrimitiveValue())
return InterpolationValue(InterpolableLength::MaybeConvertCSSValue(value));
const auto* ident = DynamicTo<CSSIdentifierValue>(value);
if (!ident)
return nullptr;
switch (ident->GetValueID()) {
case CSSValueID::kLeft:
case CSSValueID::kTop:
return InterpolationValue(InterpolableLength::CreatePercent(0));
case CSSValueID::kRight:
case CSSValueID::kBottom:
return InterpolationValue(InterpolableLength::CreatePercent(100));
case CSSValueID::kCenter:
return InterpolationValue(InterpolableLength::CreatePercent(50));
default:
NOTREACHED();
return nullptr;
}
}
InterpolationValue CSSPositionAxisListInterpolationType::MaybeConvertValue(
const CSSValue& value,
const StyleResolverState*,
ConversionCheckers&) const {
if (!value.IsBaseValueList()) {
return ListInterpolationFunctions::CreateList(
1, [&value](size_t) { return ConvertPositionAxisCSSValue(value); });
}
const auto& list = To<CSSValueList>(value);
return ListInterpolationFunctions::CreateList(
list.length(), [&list](wtf_size_t index) {
return ConvertPositionAxisCSSValue(list.Item(index));
});
}
} // namespace blink
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