| /* |
| * Copyright (C) 2003, 2006, 2008, 2011 Apple Inc. All rights reserved. |
| * Copyright (C) 2008 Holger Hans Peter Freyther |
| * Copyright (C) 2014 Google Inc. All rights 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. |
| * |
| */ |
| |
| #ifndef SimpleShaper_h |
| #define SimpleShaper_h |
| |
| #include "platform/PlatformExport.h" |
| #include "platform/fonts/shaping/Shaper.h" |
| #include "platform/geometry/FloatPoint.h" |
| #include "platform/geometry/FloatRect.h" |
| #include "platform/text/TextRun.h" |
| #include "wtf/HashSet.h" |
| #include "wtf/text/Unicode.h" |
| |
| namespace blink { |
| |
| class Font; |
| class GlyphBuffer; |
| class SimpleFontData; |
| class TextRun; |
| struct GlyphData; |
| |
| struct PLATFORM_EXPORT SimpleShaper : public Shaper { |
| public: |
| SimpleShaper(const Font*, |
| const TextRun&, |
| const GlyphData* emphasisData = nullptr, |
| HashSet<const SimpleFontData*>* fallbackFonts = nullptr, |
| FloatRect* = nullptr); |
| |
| // TODO(sk.kumar): This function should be updated to take an unsigned value, |
| // and callers should be updated to not pass negative values. |
| // See: crbug.com/540047. |
| unsigned advance(int to, GlyphBuffer* = 0); |
| bool advanceOneCharacter(float& width); |
| |
| const TextRun& run() const { return m_textRun; } |
| float runWidthSoFar() const { return m_runWidthSoFar; } |
| unsigned currentOffset() { return m_currentCharacter; } |
| |
| private: |
| unsigned m_currentCharacter; |
| float m_runWidthSoFar; |
| |
| struct CharacterData { |
| STACK_ALLOCATED(); |
| UChar32 character; |
| unsigned clusterLength; |
| int characterOffset; |
| }; |
| |
| GlyphData glyphDataForCharacter(CharacterData&, bool normalizeSpace = false); |
| float characterWidth(UChar32, const GlyphData&) const; |
| float adjustSpacing(float, const CharacterData&); |
| |
| template <typename TextIterator> |
| unsigned advanceInternal(TextIterator&, GlyphBuffer*); |
| }; |
| |
| } // namespace blink |
| |
| #endif |