distilled_page_prefs.cc revision 116680a4aac90f2aa7413d9095a592090648e557 
1// Copyright 2014 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "components/dom_distiller/core/distilled_page_prefs.h"
6
7#include "base/bind.h"
8#include "base/memory/weak_ptr.h"
9#include "base/message_loop/message_loop.h"
10#include "base/observer_list.h"
11#include "base/prefs/pref_service.h"
12#include "components/pref_registry/pref_registry_syncable.h"
13
14namespace {
15
16// Path to the integer corresponding to user's preference theme.
17const char kThemePref[] = "dom_distiller.theme";
18}
19
20namespace dom_distiller {
21
22DistilledPagePrefs::DistilledPagePrefs(PrefService* pref_service)
23    : pref_service_(pref_service), weak_ptr_factory_(this) {
24}
25
26DistilledPagePrefs::~DistilledPagePrefs() {
27}
28
29// static
30void DistilledPagePrefs::RegisterProfilePrefs(
31    user_prefs::PrefRegistrySyncable* registry) {
32  registry->RegisterIntegerPref(
33      kThemePref,
34      DistilledPagePrefs::LIGHT,
35      user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
36}
37
38void DistilledPagePrefs::SetTheme(DistilledPagePrefs::Theme new_theme) {
39  pref_service_->SetInteger(kThemePref, new_theme);
40  base::MessageLoop::current()->PostTask(
41      FROM_HERE,
42      base::Bind(&DistilledPagePrefs::NotifyOnChangeTheme,
43                 weak_ptr_factory_.GetWeakPtr(),
44                 new_theme));
45}
46
47DistilledPagePrefs::Theme DistilledPagePrefs::GetTheme() {
48  int theme = pref_service_->GetInteger(kThemePref);
49  if (theme < 0 || theme >= DistilledPagePrefs::THEME_COUNT) {
50    // Persisted data was incorrect, trying to clean it up by storing the
51    // default.
52    SetTheme(DistilledPagePrefs::LIGHT);
53    return DistilledPagePrefs::LIGHT;
54  }
55  return (Theme) theme;
56}
57
58void DistilledPagePrefs::AddObserver(Observer* obs) {
59  observers_.AddObserver(obs);
60}
61
62void DistilledPagePrefs::RemoveObserver(Observer* obs) {
63  observers_.RemoveObserver(obs);
64}
65
66void DistilledPagePrefs::NotifyOnChangeTheme(
67    DistilledPagePrefs::Theme new_theme) {
68  FOR_EACH_OBSERVER(Observer, observers_, OnChangeTheme(new_theme));
69}
70
71}  // namespace dom_distiller
72