chromium/src/third_party/blink/renderer/platform/fonts/shaping/caching_word_shaper.h

/*
 * Copyright (C) 2015 Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *
 * THIS SOFTWARE IS PROVIDED BY GOOGLE INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
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#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_FONTS_SHAPING_CACHING_WORD_SHAPER_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_FONTS_SHAPING_CACHING_WORD_SHAPER_H_

#include "base/memory/scoped_refptr.h"
#include "third_party/blink/renderer/platform/fonts/shaping/shape_result_buffer.h"
#include "third_party/blink/renderer/platform/geometry/float_rect.h"
#include "third_party/blink/renderer/platform/text/text_run.h"
#include "third_party/blink/renderer/platform/wtf/allocator/allocator.h"
#include "third_party/blink/renderer/platform/wtf/vector.h"

namespace blink {

struct CharacterRange;
class Font;
class ShapeCache;
class SimpleFontData;
struct GlyphData;
struct TextRunPaintInfo;

class PLATFORM_EXPORT CachingWordShaper final {
  STACK_ALLOCATED();

 public:
  explicit CachingWordShaper(const Font& font) : font_(font) {}
  ~CachingWordShaper() = default;

  float Width(const TextRun&,
              HashSet<const SimpleFontData*>* fallback_fonts,
              FloatRect* glyph_bounds);
  int OffsetForPosition(const TextRun&,
                        float target_x,
                        IncludePartialGlyphsOption,
                        BreakGlyphsOption);

  void FillResultBuffer(const TextRunPaintInfo&, ShapeResultBuffer*);
  CharacterRange GetCharacterRange(const TextRun&, unsigned from, unsigned to);
  Vector<CharacterRange> IndividualCharacterRanges(const TextRun&);
  Vector<double> IndividualCharacterAdvances(const TextRun&);

  Vector<ShapeResult::RunFontData> GetRunFontData(const TextRun&) const;

  GlyphData EmphasisMarkGlyphData(const TextRun&) const;

 private:
  ShapeCache* GetShapeCache() const;

  const Font& font_;

  DISALLOW_COPY_AND_ASSIGN(CachingWordShaper);
};

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_PLATFORM_FONTS_SHAPING_CACHING_WORD_SHAPER_H_