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Side by Side Diff: services/preferences/public/cpp/pref_store_client.cc

Issue 2635153002: Pref service: expose all read-only PrefStores through Mojo (Closed)
Patch Set: Create and register service Created 3 years, 10 months ago
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1 // Copyright 2017 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 "services/preferences/public/cpp/pref_store_client.h"
6 #include "mojo/public/cpp/bindings/strong_binding.h"
7 #include "services/preferences/public/cpp/pref_store_impl.h"
8
9 namespace prefs {
10
11 PrefStoreClient::PrefStoreClient(mojom::PrefStoreConnectionPtr connection)
12 : initialized_(connection->is_initialized),
13 observer_binding_(this, std::move(connection->observer)) {
14 if (initialized_)
15 OnInitializationCompleted(true);
16 OnPreferencesChanged(std::move(connection->initial_prefs));
17 }
18
19 PrefStoreClient::~PrefStoreClient() = default;
20
21 void PrefStoreClient::AddObserver(PrefStore::Observer* observer) {
22 observers_.AddObserver(observer);
23 }
24
25 void PrefStoreClient::RemoveObserver(PrefStore::Observer* observer) {
26 observers_.RemoveObserver(observer);
27 }
28
29 bool PrefStoreClient::HasObservers() const {
30 return observers_.might_have_observers();
31 }
32
33 bool PrefStoreClient::IsInitializationComplete() const {
34 return initialized_;
35 }
36
37 bool PrefStoreClient::GetValue(const std::string& key,
38 const base::Value** result) const {
39 DCHECK(initialized_);
40 return prefs_.GetValue(key, result);
41 }
42
43 std::unique_ptr<base::DictionaryValue> PrefStoreClient::GetValues() const {
44 return prefs_.AsDictionaryValue();
45 }
46
47 void PrefStoreClient::OnPreferencesChanged(
48 std::unique_ptr<base::DictionaryValue> preferences) {
49 for (base::DictionaryValue::Iterator it(*preferences); !it.IsAtEnd();
50 it.Advance()) {
51 bool changed = false;
52 if (it.value().IsType(base::Value::Type::NONE)) { // Delete
53 if (prefs_.RemoveValue(it.key()))
54 changed = true;
55 } else {
56 if (prefs_.SetValue(it.key(), it.value().CreateDeepCopy()))
57 changed = true;
58 }
59 if (changed) {
60 for (Observer& observer : observers_)
61 observer.OnPrefValueChanged(it.key());
62 }
63 }
64 }
65
66 void PrefStoreClient::OnInitializationCompleted(bool succeeded) {
67 if (!initialized_) {
68 initialized_ = true;
69 for (Observer& observer : observers_)
70 observer.OnInitializationCompleted(true);
71 }
72 }
73
74 } // namespace prefs
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