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1 // Copyright (c) 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 "chrome/browser/ui/zoom/chrome_zoom_level_prefs.h" | |
6 | |
7 #include <sstream> | |
8 | |
9 #include "base/bind.h" | |
10 #include "base/prefs/json_pref_store.h" | |
11 #include "base/prefs/pref_filter.h" | |
12 #include "base/prefs/pref_registry_simple.h" | |
13 #include "base/prefs/pref_service_factory.h" | |
14 #include "base/prefs/scoped_user_pref_update.h" | |
15 #include "base/strings/string_number_conversions.h" | |
16 #include "base/values.h" | |
17 #include "chrome/common/chrome_constants.h" | |
18 #include "chrome/common/pref_names.h" | |
19 #include "content/public/browser/browser_thread.h" | |
20 #include "content/public/browser/host_zoom_map.h" | |
21 #include "content/public/common/page_zoom.h" | |
22 | |
23 namespace chrome { | |
24 | |
25 std::string ChromeZoomLevelPrefs::GetHash(const base::FilePath& relative_path) { | |
26 size_t int_key = | |
27 #if defined(COMPILER_MSVC) | |
28 BASE_HASH_NAMESPACE::hash_value(relative_path); | |
29 #else | |
30 BASE_HASH_NAMESPACE::hash<base::FilePath>()(relative_path); | |
31 #endif // COMPILER | |
32 return base::SizeTToString(int_key); | |
33 } | |
34 | |
35 ChromeZoomLevelPrefs::ChromeZoomLevelPrefs(PrefService* pref_service, | |
36 const base::FilePath& profile_path) | |
37 : pref_service_(pref_service), | |
38 profile_path_(profile_path), | |
39 host_zoom_map_(NULL) { | |
40 DCHECK(pref_service_); | |
41 } | |
42 | |
43 ChromeZoomLevelPrefs::~ChromeZoomLevelPrefs() { | |
44 } | |
45 | |
46 void ChromeZoomLevelPrefs::InitPrefsAndCopyToHostZoomMap( | |
47 const base::FilePath& partition_path, | |
48 content::HostZoomMap* host_zoom_map) { | |
49 DCHECK(!partition_path.empty()); | |
50 DCHECK((partition_path == profile_path_) || | |
51 profile_path_.IsParent(partition_path)); | |
52 // This init function must be called only once. | |
53 DCHECK(!host_zoom_map_); | |
54 DCHECK(host_zoom_map); | |
55 host_zoom_map_ = host_zoom_map; | |
56 | |
57 // Create a partition_key string with no '.'s in it. For the default | |
58 // StoragePartition, this string will always be "0". | |
59 base::FilePath partition_relative_path; | |
60 profile_path_.AppendRelativePath(partition_path, &partition_relative_path); | |
61 partition_key_ = GetHash(partition_relative_path); | |
62 | |
63 // Initialize the default zoom level. | |
64 host_zoom_map_->SetDefaultZoomLevel(GetDefaultZoomLevelPref()); | |
65 | |
66 // Initialize the HostZoomMap with per-host zoom levels from the persisted | |
67 // zoom-level preference values. | |
68 const base::DictionaryValue* host_zoom_dictionaries = | |
69 pref_service_->GetDictionary(prefs::kPartitionPerHostZoomLevels); | |
70 const base::DictionaryValue* host_zoom_dictionary = NULL; | |
71 if (host_zoom_dictionaries->GetDictionary(partition_key_, | |
72 &host_zoom_dictionary)) { | |
73 std::vector<std::string> keys_to_remove; | |
74 for (base::DictionaryValue::Iterator i(*host_zoom_dictionary); !i.IsAtEnd(); | |
75 i.Advance()) { | |
76 const std::string& host(i.key()); | |
77 double zoom_level = 0; | |
78 | |
79 bool has_valid_zoom_level = i.value().GetAsDouble(&zoom_level); | |
80 | |
81 if (host.empty() || !has_valid_zoom_level || | |
82 content::ZoomValuesEqual(zoom_level, | |
83 host_zoom_map_->GetDefaultZoomLevel())) { | |
84 keys_to_remove.push_back(host); | |
85 continue; | |
86 } | |
87 | |
88 host_zoom_map_->SetZoomLevelForHost(host, zoom_level); | |
89 } | |
90 | |
91 // Sanitize prefs to remove entries that match the default zoom level and/or | |
92 // have an empty host. | |
93 { | |
94 DictionaryPrefUpdate update(pref_service_, | |
95 prefs::kPartitionPerHostZoomLevels); | |
96 base::DictionaryValue* host_zoom_dictionaries = update.Get(); | |
97 base::DictionaryValue* host_zoom_dictionary = NULL; | |
98 host_zoom_dictionaries->GetDictionary(partition_key_, | |
99 &host_zoom_dictionary); | |
100 for (std::string s : keys_to_remove) | |
battre
2014/10/08 11:27:10
for (const std::string& s : keys_to_remove)
wjmaclean
2014/10/10 14:40:29
Done.
| |
101 host_zoom_dictionary->RemoveWithoutPathExpansion(s, NULL); | |
102 } | |
103 } | |
104 zoom_subscription_ = host_zoom_map_->AddZoomLevelChangedCallback(base::Bind( | |
105 &ChromeZoomLevelPrefs::OnZoomLevelChanged, base::Unretained(this))); | |
106 } | |
107 | |
108 void ChromeZoomLevelPrefs::SetDefaultZoomLevelPref(double level) { | |
109 if (content::ZoomValuesEqual(level, host_zoom_map_->GetDefaultZoomLevel())) | |
110 return; | |
111 | |
112 DictionaryPrefUpdate update(pref_service_, prefs::kPartitionDefaultZoomLevel); | |
113 update->SetDouble(partition_key_, level); | |
114 // For unregistered paths, OnDefaultZoomLevelChanged won't be called, so | |
115 // set this manually. | |
116 host_zoom_map_->SetDefaultZoomLevel(level); | |
117 default_zoom_changed_callbacks_.Notify(); | |
118 } | |
119 | |
120 double ChromeZoomLevelPrefs::GetDefaultZoomLevelPref() const { | |
121 double default_zoom_level = 0.0; | |
122 | |
123 const base::DictionaryValue* default_zoom_level_dictionary = | |
124 pref_service_->GetDictionary(prefs::kPartitionDefaultZoomLevel); | |
125 // If no default has been previously set, the default returned is the | |
126 // value used to initialize default_zoom_level in this function. | |
127 default_zoom_level_dictionary->GetDouble(partition_key_, &default_zoom_level); | |
128 return default_zoom_level; | |
129 } | |
130 | |
131 scoped_ptr<ChromeZoomLevelPrefs::DefaultZoomLevelSubscription> | |
132 ChromeZoomLevelPrefs::RegisterDefaultZoomLevelCallback( | |
133 const base::Closure& callback) { | |
134 return default_zoom_changed_callbacks_.Add(callback); | |
135 } | |
136 | |
137 void ChromeZoomLevelPrefs::OnZoomLevelChanged( | |
138 const content::HostZoomMap::ZoomLevelChange& change) { | |
139 if (change.mode != content::HostZoomMap::ZOOM_CHANGED_FOR_HOST) | |
140 return; | |
141 double level = change.zoom_level; | |
142 DictionaryPrefUpdate update(pref_service_, | |
143 prefs::kPartitionPerHostZoomLevels); | |
144 base::DictionaryValue* host_zoom_dictionaries = update.Get(); | |
145 DCHECK(host_zoom_dictionaries); | |
146 | |
147 bool modification_is_removal = | |
wjmaclean
2014/10/06 19:24:07
I'd like to use this value as a key to when to exp
| |
148 content::ZoomValuesEqual(level, host_zoom_map_->GetDefaultZoomLevel()); | |
149 | |
150 base::DictionaryValue* host_zoom_dictionary = NULL; | |
151 if (!host_zoom_dictionaries->GetDictionary(partition_key_, | |
152 &host_zoom_dictionary)) { | |
153 host_zoom_dictionary = new base::DictionaryValue(); | |
154 host_zoom_dictionaries->Set(partition_key_, host_zoom_dictionary); | |
155 } | |
156 | |
157 if (modification_is_removal) | |
158 host_zoom_dictionary->RemoveWithoutPathExpansion(change.host, NULL); | |
159 else | |
160 host_zoom_dictionary->SetDoubleWithoutPathExpansion(change.host, level); | |
161 } | |
162 | |
163 } // namespace chrome | |
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