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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 "core/css/cssom/CSSSkew.h"
#include "core/css/CSSFunctionValue.h"
#include "core/css/CSSPrimitiveValue.h"
#include "core/css/cssom/CSSAngleValue.h"
namespace blink {
CSSSkew* CSSSkew::fromCSSValue(const CSSFunctionValue& value) {
const CSSPrimitiveValue& xValue = toCSSPrimitiveValue(value.item(0));
if (xValue.isCalculated()) {
// TODO(meade): Decide what we want to do with calc angles.
return nullptr;
}
DCHECK(xValue.isAngle());
switch (value.functionType()) {
case CSSValueSkew:
if (value.length() == 2U) {
const CSSPrimitiveValue& yValue = toCSSPrimitiveValue(value.item(1));
if (yValue.isCalculated()) {
// TODO(meade): Decide what we want to do with calc angles.
return nullptr;
}
DCHECK(yValue.isAngle());
return CSSSkew::create(CSSAngleValue::fromCSSValue(xValue),
CSSAngleValue::fromCSSValue(yValue));
}
// Else fall through; skew(ax) == skewX(ax).
case CSSValueSkewX:
DCHECK_EQ(value.length(), 1U);
return CSSSkew::create(
CSSAngleValue::fromCSSValue(xValue),
CSSAngleValue::create(0, CSSPrimitiveValue::UnitType::Degrees));
case CSSValueSkewY:
DCHECK_EQ(value.length(), 1U);
return CSSSkew::create(
CSSAngleValue::create(0, CSSPrimitiveValue::UnitType::Degrees),
CSSAngleValue::fromCSSValue(xValue));
default:
NOTREACHED();
return nullptr;
}
}
CSSFunctionValue* CSSSkew::toCSSValue() const {
CSSFunctionValue* result = CSSFunctionValue::create(CSSValueSkew);
result->append(*CSSPrimitiveValue::create(m_ax->value(), m_ax->unit()));
result->append(*CSSPrimitiveValue::create(m_ay->value(), m_ay->unit()));
return result;
}
} // namespace blink
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