
This allows users of PrefService to check if there is a pref service attached as there are environments where this can be the case. Change-Id: I30a3b80e5ab1e4c01a14b04bc51a5189108a693f Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4924031 Commit-Queue: Bryant Chandler <bryantchandler@chromium.org> Reviewed-by: Gabriel Charette <gab@chromium.org> Cr-Commit-Position: refs/heads/main@{#1208300}
48 lines
1.5 KiB
C++
48 lines
1.5 KiB
C++
// Copyright 2013 The Chromium Authors
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef COMPONENTS_USER_PREFS_USER_PREFS_H_
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#define COMPONENTS_USER_PREFS_USER_PREFS_H_
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#include "base/memory/raw_ptr.h"
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#include "base/supports_user_data.h"
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#include "components/user_prefs/user_prefs_export.h"
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class PrefService;
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namespace user_prefs {
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// Components may use preferences associated with a given user. These hang off
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// of base::SupportsUserData and can be retrieved using UserPrefs::Get().
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//
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// It is up to the embedder to create and own the PrefService and attach it to
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// base::SupportsUserData using the UserPrefs::Set() function.
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class USER_PREFS_EXPORT UserPrefs : public base::SupportsUserData::Data {
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public:
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UserPrefs(const UserPrefs&) = delete;
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UserPrefs& operator=(const UserPrefs&) = delete;
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~UserPrefs() override;
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// Returns true if there is a PrefService attached to the given context.
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static bool IsInitialized(base::SupportsUserData* context);
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// Retrieves the PrefService for a given context.
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static PrefService* Get(base::SupportsUserData* context);
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// Hangs the specified |prefs| off of |context|. Should be called
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// only once per context.
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static void Set(base::SupportsUserData* context, PrefService* prefs);
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private:
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explicit UserPrefs(PrefService* prefs);
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// Non-owning; owned by embedder.
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raw_ptr<PrefService, AcrossTasksDanglingUntriaged> prefs_;
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};
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} // namespace user_prefs
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#endif // COMPONENTS_USER_PREFS_USER_PREFS_H_
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