gfx_layout_fallback.h

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/*
 * This file is part of OpenTTD.
 * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
 * OpenTTD 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 General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <https://www.gnu.org/licenses/old-licenses/gpl-2.0>.
 */
 
#ifndef GFX_LAYOUT_FALLBACK_H
#define GFX_LAYOUT_FALLBACK_H
 
#include "gfx_layout.h"
 
class FallbackParagraphLayoutFactory {
public:
  typedef char32_t CharType;
  static const bool SUPPORTS_RTL = false;
 
  static std::unique_ptr<ParagraphLayouter> GetParagraphLayout(char32_t *buff, char32_t *buff_end, FontMap &font_mapping);
  static size_t AppendToBuffer(char32_t *buff, const char32_t *buffer_last, char32_t c);
};
 
inline char32_t SwapRtlPairedCharacters(char32_t c)
{
  /* There are many more paired brackets, but for fallback purposes we only handle ASCII brackets. */
  /* https://www.unicode.org/Public/UCD/latest/ucd/BidiBrackets.txt */
  switch (c) {
    case U'(': return U')';
    case U')': return U'(';
    case U'[': return U']';
    case U']': return U'[';
    case U'{': return U'}';
    case U'}': return U'{';
    default: return c;
  }
}
 
#endif /* GFX_LAYOUT_FALLBACK_H */