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/*
* Copyright (C) 2018 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "Length.h"
#include <wtf/text/TextStream.h>
namespace WebCore {
class TextUnderlineOffset {
public:
static TextUnderlineOffset createWithAuto()
{
return TextUnderlineOffset();
}
static TextUnderlineOffset createWithLength(Length&& length)
{
return TextUnderlineOffset(WTFMove(length));
}
bool isAuto() const
{
return m_length.type() == LengthType::Auto;
}
bool isLength() const
{
return !isAuto();
}
const Length& length() const
{
ASSERT(isLength());
return m_length;
}
float resolve(float fontSize, float defaultValue = 0.f) const
{
if (isAuto())
return defaultValue;
ASSERT(isLength());
if (m_length.isPercent())
return fontSize * (m_length.percent() / 100.0f);
if (m_length.isCalculated())
return m_length.nonNanCalculatedValue(fontSize);
return m_length.value();
}
bool operator==(const TextUnderlineOffset& other) const = default;
private:
Length m_length;
TextUnderlineOffset()
: m_length(Length(LengthType::Auto))
{
}
TextUnderlineOffset(Length&& lengthValue)
: m_length(WTFMove(lengthValue))
{
}
};
inline TextStream& operator<<(TextStream& ts, const TextUnderlineOffset& offset)
{
if (offset.isAuto())
ts << "auto";
else
ts << offset.length();
return ts;
}
} // namespace WebCore
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