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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 LengthUnitsChecker_h
#define LengthUnitsChecker_h
#include "core/animation/InterpolationType.h"
#include "core/css/CSSPrimitiveValue.h"
#include "core/css/resolver/StyleResolverState.h"
#include "wtf/PtrUtil.h"
#include <memory>
namespace blink {
class LengthUnitsChecker : public InterpolationType::ConversionChecker {
public:
static std::unique_ptr<LengthUnitsChecker> maybeCreate(
CSSLengthArray&& lengthArray,
const StyleResolverState& state) {
bool create = false;
size_t lastIndex = 0;
for (size_t i = 0; i < lengthArray.values.size(); i++) {
if (i == CSSPrimitiveValue::UnitTypePercentage ||
!lengthArray.typeFlags.get(i))
continue;
lengthArray.values[i] = lengthUnit(i, state.cssToLengthConversionData());
create = true;
lastIndex = i;
}
if (!create)
return nullptr;
return WTF::wrapUnique(
new LengthUnitsChecker(std::move(lengthArray), lastIndex));
}
bool isValid(const InterpolationEnvironment& environment,
const InterpolationValue& underlying) const final {
for (size_t i = 0; i <= m_lastIndex; i++) {
if (i == CSSPrimitiveValue::UnitTypePercentage ||
!m_lengthArray.typeFlags.get(i))
continue;
if (m_lengthArray.values[i] !=
lengthUnit(i, environment.state().cssToLengthConversionData()))
return false;
}
return true;
}
static double lengthUnit(size_t lengthUnitType,
const CSSToLengthConversionData& conversionData) {
return conversionData.zoomedComputedPixels(
1, CSSPrimitiveValue::lengthUnitTypeToUnitType(
static_cast<CSSPrimitiveValue::LengthUnitType>(lengthUnitType)));
}
private:
LengthUnitsChecker(CSSPrimitiveValue::CSSLengthArray&& lengthArray,
size_t lastIndex)
: m_lengthArray(std::move(lengthArray)), m_lastIndex(lastIndex) {}
const CSSLengthArray m_lengthArray;
const size_t m_lastIndex;
};
} // namespace blink
#endif // LengthUnitsChecker_h
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