| /* |
| * 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" |
| |
| #if ENABLE(LAYOUT_FORMATTING_CONTEXT) |
| |
| #include "FontCascade.h" |
| #include "InlineSoftLineBreakItem.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, UBiDiLevel bidiLevel) |
| : InlineItem(inlineTextBox, Type::Text, bidiLevel) |
| { |
| } |
| |
| 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::isCollapsibleNonBreakingSpace() const |
| { |
| if (style().nbspMode() != NBSPMode::Space) |
| return false; |
| // Note that this text item may be longer than just one character. |
| return m_length && inlineTextBox().content()[start()] == noBreakSpace; |
| } |
| |
| bool InlineTextItem::shouldPreserveSpacesAndTabs(const InlineTextItem& inlineTextItem) |
| { |
| ASSERT(inlineTextItem.isWhitespace()); |
| return TextUtil::shouldPreserveSpacesAndTabs(inlineTextItem.layoutBox()); |
| } |
| |
| } |
| } |
| #endif |