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