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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_ASH_LANGUAGE_PACKS_LANGUAGE_PACK_FONT_SERVICE_H_
#define CHROME_BROWSER_ASH_LANGUAGE_PACKS_LANGUAGE_PACK_FONT_SERVICE_H_
#include <string>
#include "base/containers/flat_set.h"
#include "base/functional/callback.h"
#include "base/memory/raw_ref.h"
#include "base/memory/weak_ptr.h"
#include "components/keyed_service/core/keyed_service.h"
#include "components/prefs/pref_member.h"
class PrefService;
namespace base {
class FilePath;
}
namespace ash::language_packs {
struct PackResult;
// Executes preference-based DLC-font tasks:
// - On initialisation of this keyed service (which is created with the browser
// context), gets the user's web language prefs and adds the fonts available
// from DLC to fontconfig.
// - When user's web language prefs changes, installs the appropriate font DLC.
class LanguagePackFontService : public KeyedService {
public:
using AddFontDir = base::RepeatingCallback<bool(const base::FilePath&)>;
explicit LanguagePackFontService(PrefService* prefs);
// Used for injecting `gfx::AddAppFontDir` for tests. `add_font_dir` should
// return whether the font was added. A warning will be printed to the log if
// it was not added, which should never happen.
explicit LanguagePackFontService(PrefService* prefs, AddFontDir add_font_dir);
~LanguagePackFontService() override;
private:
base::flat_set<std::string> GetLanguagePacksForAcceptLanguage();
void OnAcceptLanguageChanged();
void GetPackStateOnInitCallback(const PackResult& result);
void InstallPackOnInitCallback(const PackResult& result);
void AddFontDirFromPackResult(const PackResult& result);
// Not owned by this class
const raw_ref<PrefService> prefs_;
StringPrefMember pref_accept_language_;
// Used for dependency injection for tests.
AddFontDir add_font_dir_;
base::WeakPtrFactory<LanguagePackFontService> weak_factory_{this};
};
} // namespace ash::language_packs
#endif // CHROME_BROWSER_ASH_LANGUAGE_PACKS_LANGUAGE_PACK_FONT_SERVICE_H_
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