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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.
*/
#include "config.h"
#include "InlineTextItem.h"
#include "FontCascade.h"
#include "InlineSoftLineBreakItem.h"
#include "RenderStyleInlines.h"
#include "TextUtil.h"
#include <wtf/unicode/CharacterNames.h>
namespace WebCore {
namespace Layout {
static_assert(sizeof(InlineItem) == sizeof(InlineTextItem));
InlineTextItem::InlineTextItem(const InlineTextBox& inlineTextBox, unsigned start, unsigned length, UBiDiLevel bidiLevel, bool hasTrailingSoftHyphen, bool isWordSeparator, std::optional<InlineLayoutUnit> width, TextItemType textItemType)
: InlineItem(inlineTextBox, Type::Text, bidiLevel)
{
m_startOrPosition = start;
m_length = length;
m_hasWidth = !!width;
m_hasTrailingSoftHyphen = hasTrailingSoftHyphen;
m_isWordSeparator = isWordSeparator;
m_width = width.value_or(0);
m_textItemType = textItemType;
}
InlineTextItem::InlineTextItem(const InlineTextBox& inlineTextBox)
: InlineItem(inlineTextBox, Type::Text, UBIDI_DEFAULT_LTR)
{
}
InlineTextItem InlineTextItem::left(unsigned length) const
{
RELEASE_ASSERT(length <= this->length());
ASSERT(m_textItemType != TextItemType::Undefined);
ASSERT(length);
return { inlineTextBox(), start(), length, bidiLevel(), false, isWordSeparator(), std::nullopt, m_textItemType };
}
InlineTextItem InlineTextItem::right(unsigned length, std::optional<InlineLayoutUnit> width) const
{
RELEASE_ASSERT(length <= this->length());
ASSERT(m_textItemType != TextItemType::Undefined);
ASSERT(length);
return { inlineTextBox(), end() - length, length, bidiLevel(), hasTrailingSoftHyphen(), isWordSeparator(), width, m_textItemType };
}
InlineTextItem InlineTextItem::split(size_t leftSideLength)
{
RELEASE_ASSERT(length() > 1);
RELEASE_ASSERT(leftSideLength && leftSideLength < length());
auto rightSide = right(length() - leftSideLength, { });
m_length = length() - rightSide.length();
m_hasWidth = false;
m_width = { };
return rightSide;
}
bool InlineTextItem::isZeroWidthSpaceSeparator() const
{
// FIXME: We should check for more zero width content and not just U+200B.
return !m_length || (m_length == 1 && inlineTextBox().content()[start()] == zeroWidthSpace);
}
bool InlineTextItem::isQuirkNonBreakingSpace() const
{
if (style().nbspMode() != NBSPMode::Space || style().textWrapMode() == TextWrapMode::NoWrap || style().whiteSpaceCollapse() == WhiteSpaceCollapse::BreakSpaces)
return false;
return m_length && inlineTextBox().content()[start()] == noBreakSpace;
}
bool InlineTextItem::isFullyTrimmable() const
{
return isWhitespace() && !TextUtil::shouldPreserveSpacesAndTabs(layoutBox());
}
bool InlineTextItem::shouldPreserveSpacesAndTabs(const InlineTextItem& inlineTextItem)
{
ASSERT(inlineTextItem.isWhitespace());
return TextUtil::shouldPreserveSpacesAndTabs(inlineTextItem.layoutBox());
}
}
}
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