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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 "LayoutBox.h"
#include "LayoutUnits.h"
#include <unicode/ubidi.h>
namespace WebCore {
namespace Layout {
class InlineItemsBuilder;
class InlineItem {
public:
enum class Type : uint8_t {
Text,
HardLineBreak,
SoftLineBreak,
WordBreakOpportunity,
Box,
InlineBoxStart,
InlineBoxEnd,
Float
};
InlineItem(const Box& layoutBox, Type, UBiDiLevel = UBIDI_DEFAULT_LTR);
Type type() const { return m_type; }
static constexpr UBiDiLevel opaqueBidiLevel = 0xff;
UBiDiLevel bidiLevel() const { return m_bidiLevel; }
const Box& layoutBox() const { return *m_layoutBox; }
const RenderStyle& style() const { return layoutBox().style(); }
const RenderStyle& firstLineStyle() const { return layoutBox().firstLineStyle(); }
bool isText() const { return type() == Type::Text; }
bool isBox() const { return type() == Type::Box; }
bool isFloat() const { return type() == Type::Float; }
bool isLineBreak() const { return isSoftLineBreak() || isHardLineBreak(); }
bool isWordBreakOpportunity() const { return type() == Type::WordBreakOpportunity; }
bool isSoftLineBreak() const { return type() == Type::SoftLineBreak; }
bool isHardLineBreak() const { return type() == Type::HardLineBreak; }
bool isInlineBoxStart() const { return type() == Type::InlineBoxStart; }
bool isInlineBoxEnd() const { return type() == Type::InlineBoxEnd; }
private:
friend class InlineItemsBuilder;
void setBidiLevel(UBiDiLevel bidiLevel) { m_bidiLevel = bidiLevel; }
void setWidth(InlineLayoutUnit);
const Box* m_layoutBox { nullptr };
protected:
InlineLayoutUnit m_width { };
unsigned m_length { 0 };
// For InlineTextItem and InlineSoftLineBreakItem
unsigned m_startOrPosition { 0 };
private:
UBiDiLevel m_bidiLevel { UBIDI_DEFAULT_LTR };
Type m_type : 3 { };
protected:
// For InlineTextItem
enum class TextItemType : uint8_t { Undefined, Whitespace, NonWhitespace };
TextItemType m_textItemType : 2 { TextItemType::Undefined };
bool m_hasWidth : 1 { false };
bool m_hasTrailingSoftHyphen : 1 { false };
bool m_isWordSeparator : 1 { false };
};
inline InlineItem::InlineItem(const Box& layoutBox, Type type, UBiDiLevel bidiLevel)
: m_layoutBox(&layoutBox)
, m_bidiLevel(bidiLevel)
, m_type(type)
{
}
inline void InlineItem::setWidth(InlineLayoutUnit width)
{
m_width = width;
m_hasWidth = true;
}
#define SPECIALIZE_TYPE_TRAITS_INLINE_ITEM(ToValueTypeName, predicate) \
SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::Layout::ToValueTypeName) \
static bool isType(const WebCore::Layout::InlineItem& inlineItem) { return inlineItem.predicate; } \
SPECIALIZE_TYPE_TRAITS_END()
}
}
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