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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.
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_ANIMATION_LENGTH_UNITS_CHECKER_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_ANIMATION_LENGTH_UNITS_CHECKER_H_
#include <memory>
#include <utility>
#include "base/memory/ptr_util.h"
#include "third_party/blink/renderer/core/animation/css_interpolation_type.h"
#include "third_party/blink/renderer/core/css/css_primitive_value.h"
#include "third_party/blink/renderer/core/css/resolver/style_resolver_state.h"
namespace blink {
class LengthUnitsChecker : public CSSInterpolationType::CSSConversionChecker {
public:
static std::unique_ptr<LengthUnitsChecker> MaybeCreate(
const CSSPrimitiveValue::LengthTypeFlags& length_types,
const StyleResolverState& state) {
bool create = false;
wtf_size_t last_index = 0;
CSSLengthArray length_array;
for (wtf_size_t i = 0; i < length_types.size(); ++i) {
if (i == CSSPrimitiveValue::kUnitTypePercentage || !length_types[i])
continue;
length_array.values[i] = LengthUnit(i, state.CssToLengthConversionData());
length_array.type_flags.set(i);
create = true;
last_index = i;
}
if (!create)
return nullptr;
return base::WrapUnique(
new LengthUnitsChecker(std::move(length_array), last_index));
}
bool IsValid(const StyleResolverState& state,
const InterpolationValue& underlying) const final {
for (wtf_size_t i = 0; i <= last_index_; i++) {
if (i == CSSPrimitiveValue::kUnitTypePercentage ||
!length_array_.type_flags[i])
continue;
if (length_array_.values[i] !=
LengthUnit(i, state.CssToLengthConversionData()))
return false;
}
return true;
}
static double LengthUnit(wtf_size_t length_unit_type,
const CSSToLengthConversionData& conversion_data) {
return conversion_data.ZoomedComputedPixels(
1,
CSSPrimitiveValue::LengthUnitTypeToUnitType(
static_cast<CSSPrimitiveValue::LengthUnitType>(length_unit_type)));
}
private:
LengthUnitsChecker(CSSPrimitiveValue::CSSLengthArray&& length_array,
wtf_size_t last_index)
: length_array_(std::move(length_array)), last_index_(last_index) {}
const CSSLengthArray length_array_;
const wtf_size_t last_index_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_ANIMATION_LENGTH_UNITS_CHECKER_H_
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