| /* |
| * Copyright (C) 2000 Lars Knoll (knoll@kde.org) |
| * Copyright (C) 2003-2021 Apple Inc. All right reserved. |
| * Copyright (C) 2010 Google Inc. All rights reserved. |
| * Copyright (C) 2013 ChangSeok Oh <shivamidow@gmail.com> |
| * Copyright (C) 2013 Adobe Systems Inc. All right reserved. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| * |
| */ |
| |
| #pragma once |
| |
| #include "FontCascade.h" |
| #include "RenderBlock.h" |
| #include "RenderStyle.h" |
| #include <optional> |
| #include <wtf/HashSet.h> |
| |
| namespace WebCore { |
| |
| struct WordTrailingSpace { |
| WordTrailingSpace(const RenderStyle& style, bool measuringWithTrailingWhitespaceEnabled = true) |
| : m_style(style) |
| { |
| if (!measuringWithTrailingWhitespaceEnabled || !m_style.fontCascade().enableKerning()) |
| m_state = WordTrailingSpaceState::Initialized; |
| } |
| |
| std::optional<float> width(HashSet<const Font*>& fallbackFonts) |
| { |
| if (m_state == WordTrailingSpaceState::Initialized) |
| return m_width; |
| |
| auto& font = m_style.fontCascade(); |
| m_width = font.width(RenderBlock::constructTextRun(&space, 1, m_style), &fallbackFonts) + font.wordSpacing(); |
| m_state = WordTrailingSpaceState::Initialized; |
| return m_width; |
| } |
| |
| private: |
| enum class WordTrailingSpaceState { Uninitialized, Initialized }; |
| const RenderStyle& m_style; |
| WordTrailingSpaceState m_state { WordTrailingSpaceState::Uninitialized }; |
| std::optional<float> m_width; |
| }; |
| |
| } // namespace WebCore |