chromium/third_party/blink/renderer/platform/fonts/font_fallback_map.h

// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_FONTS_FONT_FALLBACK_MAP_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_FONTS_FONT_FALLBACK_MAP_H_

#include "third_party/blink/renderer/platform/fonts/font_cache_client.h"
#include "third_party/blink/renderer/platform/fonts/font_description.h"
#include "third_party/blink/renderer/platform/fonts/font_fallback_list.h"
#include "third_party/blink/renderer/platform/fonts/font_selector_client.h"
#include "third_party/blink/renderer/platform/heap/collection_support/heap_hash_map.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"
#include "third_party/blink/renderer/platform/platform_export.h"
#include "third_party/blink/renderer/platform/wtf/vector.h"

namespace blink {

class FontSelector;

// This class acts as a cache ensuring that equivalent `FontDescription`s will
// have the same `FontFallbackList`.
//
// This class doesn't retain the `FontFallbackList`s however, only having a weak
// reference to them.
class PLATFORM_EXPORT FontFallbackMap : public FontCacheClient,
                                        public FontSelectorClient { … };

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_PLATFORM_FONTS_FONT_FALLBACK_MAP_H_