File: pref_observer.h

package info (click to toggle)
chromium 141.0.7390.122-1
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 6,246,384 kB
  • sloc: cpp: 35,265,044; ansic: 7,169,920; javascript: 4,250,185; python: 1,460,635; asm: 950,788; xml: 751,771; pascal: 187,972; sh: 89,459; perl: 88,691; objc: 79,953; sql: 53,924; cs: 44,622; fortran: 24,137; makefile: 22,313; tcl: 15,277; php: 14,018; yacc: 8,995; ruby: 7,553; awk: 3,720; lisp: 3,096; lex: 1,330; ada: 727; jsp: 228; sed: 36
file content (29 lines) | stat: -rw-r--r-- 1,018 bytes parent folder | download | duplicates (3) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
 
// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef COMPONENTS_PREFS_PREF_OBSERVER_H_
#define COMPONENTS_PREFS_PREF_OBSERVER_H_

#include <string_view>

#include "base/observer_list_types.h"

class PrefService;

// Used internally to the Prefs subsystem to pass preference change
// notifications between PrefService, PrefNotifierImpl, PrefMemberBase
// and PrefChangeRegistrar.
class PrefObserver : public base::CheckedObserver {
 public:
  // Invoked before the destruction of the PrefService. The PrefObserver
  // must unsubscribe from the PrefService (and must no longer reference
  // the PrefService).
  virtual void OnServiceDestroyed(PrefService* service) = 0;

  // Invoked when the value of the preference named `pref_name` changes.
  virtual void OnPreferenceChanged(PrefService* service,
                                   std::string_view pref_name) = 0;
};

#endif  // COMPONENTS_PREFS_PREF_OBSERVER_H_