chromium/src/third_party/blink/renderer/platform/fonts/font_data_for_range_set.h

/*
 * Copyright (C) 2008, 2009 Apple Inc. All rights reserved.
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 * 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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 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_FONTS_FONT_DATA_FOR_RANGE_SET_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_FONTS_FONT_DATA_FOR_RANGE_SET_H_

#include "third_party/blink/renderer/platform/fonts/font_data.h"
#include "third_party/blink/renderer/platform/fonts/simple_font_data.h"
#include "third_party/blink/renderer/platform/fonts/unicode_range_set.h"
#include "third_party/blink/renderer/platform/wtf/allocator/allocator.h"
#include "third_party/blink/renderer/platform/wtf/text/character_names.h"

namespace blink {

class SimpleFontData;

class PLATFORM_EXPORT FontDataForRangeSet
    : public RefCounted<FontDataForRangeSet> {
 public:
  explicit FontDataForRangeSet(
      scoped_refptr<SimpleFontData> font_data = nullptr,
      scoped_refptr<UnicodeRangeSet> range_set = nullptr)
      : font_data_(std::move(font_data)), range_set_(std::move(range_set)) {}

  FontDataForRangeSet(const FontDataForRangeSet& other);

  virtual ~FontDataForRangeSet() = default;

  bool Contains(UChar32 test_char) const {
    return !range_set_ || range_set_->Contains(test_char);
  }
  bool IsEntireRange() const {
    return !range_set_ || range_set_->IsEntireRange();
  }
  UnicodeRangeSet* Ranges() const { return range_set_.get(); }
  bool HasFontData() const { return font_data_.get(); }
  const SimpleFontData* FontData() const { return font_data_.get(); }

  // TODO(xiaochengh): |FontData::IsLoadingFallback()| returns true if the
  // FontData is a pending custom font. We should rename it for better clarity.
  bool IsPendingCustomFont() const {
    return font_data_ && font_data_->IsLoadingFallback();
  }

 protected:
  scoped_refptr<SimpleFontData> font_data_;
  scoped_refptr<UnicodeRangeSet> range_set_;
};

class PLATFORM_EXPORT FontDataForRangeSetFromCache
    : public FontDataForRangeSet {
 public:
  explicit FontDataForRangeSetFromCache(
      scoped_refptr<SimpleFontData> font_data,
      scoped_refptr<UnicodeRangeSet> range_set = nullptr)
      : FontDataForRangeSet(std::move(font_data), std::move(range_set)) {}
  ~FontDataForRangeSetFromCache() override;
};

}  // namespace blink

#endif