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// Copyright 2015 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/CSSLengthValue.h"
#include "bindings/core/v8/ExceptionState.h"
#include "core/css/CSSPrimitiveValue.h"
#include "core/css/cssom/CSSCalcDictionary.h"
#include "core/css/cssom/CSSCalcLength.h"
#include "core/css/cssom/CSSSimpleLength.h"
#include "wtf/HashMap.h"
namespace blink {
CSSPrimitiveValue::UnitType CSSLengthValue::unitFromName(const String& name) {
if (equalIgnoringASCIICase(name, "percent") || name == "%")
return CSSPrimitiveValue::UnitType::Percentage;
return CSSPrimitiveValue::stringToUnitType(name);
}
CSSLengthValue* CSSLengthValue::fromCSSValue(const CSSPrimitiveValue& value) {
if (value.isCalculated()) {
// TODO(meade): Implement CSSCalcLength::fromCSSValue.
return nullptr;
}
return CSSSimpleLength::fromCSSValue(value);
}
CSSLengthValue* CSSLengthValue::from(const String& cssText,
ExceptionState& exceptionState) {
// TODO: Implement
return nullptr;
}
CSSLengthValue* CSSLengthValue::from(double value,
const String& type,
ExceptionState&) {
return CSSSimpleLength::create(value, unitFromName(type));
}
CSSLengthValue* CSSLengthValue::from(const CSSCalcDictionary& dictionary,
ExceptionState& exceptionState) {
return CSSCalcLength::create(dictionary, exceptionState);
}
CSSLengthValue* CSSLengthValue::add(const CSSLengthValue* other) {
if (type() == CalcLengthType)
return addInternal(other);
DCHECK_EQ(type(), SimpleLengthType);
if (other->type() == SimpleLengthType &&
toCSSSimpleLength(this)->unit() == toCSSSimpleLength(other)->unit()) {
return addInternal(other);
}
// TODO(meade): This CalcLength is immediately thrown away. We might want
// to optimize this at some point.
CSSCalcLength* result = CSSCalcLength::create(this);
return result->add(other);
}
CSSLengthValue* CSSLengthValue::subtract(const CSSLengthValue* other) {
if (type() == CalcLengthType)
return subtractInternal(other);
DCHECK_EQ(type(), SimpleLengthType);
if (other->type() == SimpleLengthType &&
toCSSSimpleLength(this)->unit() == toCSSSimpleLength(other)->unit()) {
return subtractInternal(other);
}
CSSCalcLength* result = CSSCalcLength::create(this);
return result->subtract(other);
}
CSSLengthValue* CSSLengthValue::multiply(double x) {
return multiplyInternal(x);
}
CSSLengthValue* CSSLengthValue::divide(double x,
ExceptionState& exceptionState) {
if (x == 0) {
exceptionState.throwRangeError("Cannot divide by zero");
return nullptr;
}
return divideInternal(x);
}
CSSLengthValue* CSSLengthValue::addInternal(const CSSLengthValue*) {
NOTREACHED();
return nullptr;
}
CSSLengthValue* CSSLengthValue::subtractInternal(const CSSLengthValue*) {
NOTREACHED();
return nullptr;
}
CSSLengthValue* CSSLengthValue::multiplyInternal(double) {
NOTREACHED();
return nullptr;
}
CSSLengthValue* CSSLengthValue::divideInternal(double) {
NOTREACHED();
return nullptr;
}
} // namespace blink
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