Index: chrome/browser/ui/zoom/chrome_zoom_level_prefs.cc |
diff --git a/chrome/browser/ui/zoom/chrome_zoom_level_prefs.cc b/chrome/browser/ui/zoom/chrome_zoom_level_prefs.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..5d740b012dfc77954035988e62b15dc81fbce3a2 |
--- /dev/null |
+++ b/chrome/browser/ui/zoom/chrome_zoom_level_prefs.cc |
@@ -0,0 +1,176 @@ |
+// Copyright (c) 2014 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+#include "chrome/browser/ui/zoom/chrome_zoom_level_prefs.h" |
+ |
+#include <sstream> |
+ |
+#include "base/bind.h" |
+#include "base/prefs/json_pref_store.h" |
+#include "base/prefs/pref_filter.h" |
+#include "base/prefs/pref_registry_simple.h" |
+#include "base/prefs/pref_service_factory.h" |
+#include "base/prefs/scoped_user_pref_update.h" |
+#include "base/values.h" |
+#include "chrome/common/chrome_constants.h" |
+#include "chrome/common/pref_names.h" |
+#include "content/public/browser/browser_thread.h" |
+#include "content/public/browser/host_zoom_map.h" |
+#include "content/public/common/page_zoom.h" |
+ |
+namespace chrome { |
+ |
+ChromeZoomLevelPrefs::ChromeZoomLevelPrefs(PrefService* pref_service, |
+ const base::FilePath& profile_path) |
+ : pref_service_(pref_service), |
+ profile_path_(profile_path), |
+ host_zoom_map_(NULL) { |
+ DCHECK(pref_service_); |
+} |
+ |
+ChromeZoomLevelPrefs::~ChromeZoomLevelPrefs() { |
+ zoom_subscription_.reset(); |
+ pref_change_registrar_.RemoveAll(); |
+} |
+ |
+void ChromeZoomLevelPrefs::InitPrefsAndCopyToHostZoomMap( |
+ const base::FilePath& partition_path, |
+ content::HostZoomMap* host_zoom_map) { |
+ DCHECK(!partition_path.empty()); |
+ DCHECK((partition_path == profile_path_) || |
+ profile_path_.IsParent(partition_path)); |
+ DCHECK(host_zoom_map); |
+ host_zoom_map_ = host_zoom_map; |
+ |
+ pref_change_registrar_.Init(pref_service_); |
+ |
+ // Create a partition_key string with no '.'s in it. For the default |
+ // StoragePartition, this string will always be "0". |
+ base::FilePath partition_relative_path; |
+ profile_path_.AppendRelativePath(partition_path, &partition_relative_path); |
+ size_t int_key = |
+ BASE_HASH_NAMESPACE::hash<base::FilePath>()(partition_relative_path); |
+ std::stringstream key_stream; |
+ key_stream << int_key; |
Bernhard Bauer
2014/10/01 15:09:14
I don't think we use streams.
Could you use base:
wjmaclean
2014/10/01 20:33:00
Done.
|
+ partition_key_ = key_stream.str(); |
+ default_zoom_level_path_ = prefs::kDefaultZoomLevel; |
+ default_zoom_level_path_ += "." + partition_key_; |
+ |
+ // Initialize the default zoom level. |
+ double default_zoom_level = 0.0; |
+ const base::DictionaryValue* default_zoom_level_dictionary = |
+ pref_service_->GetDictionary(prefs::kDefaultZoomLevel); |
+ if (!default_zoom_level_dictionary || |
+ !default_zoom_level_dictionary->GetDouble(partition_key_, |
+ &default_zoom_level)) { |
+ // We will only get here if the default zoom level for this partition |
+ // has never been set before. |
+ SetDefaultZoomLevel(default_zoom_level); |
+ } |
+ host_zoom_map_->SetDefaultZoomLevel(default_zoom_level); |
+ |
+ // Only sign up for notifications if the default zoom level for this |
+ // partition has been registered. |
+ if (pref_service_->FindPreference(default_zoom_level_path_.c_str())) { |
+ pref_change_registrar_.Add( |
+ default_zoom_level_path_.c_str(), |
+ base::Bind(&ChromeZoomLevelPrefs::OnDefaultZoomLevelChanged, |
+ base::Unretained(this))); |
+ } |
+ |
+ // Initialize the HostZoomMap with per-host zoom levels from the persisted |
+ // zoom-level preference values. |
+ const base::DictionaryValue* host_zoom_dictionaries = |
+ pref_service_->GetDictionary(prefs::kPerHostZoomLevels); |
+ const base::DictionaryValue* host_zoom_dictionary; |
+ if (host_zoom_dictionaries && |
+ host_zoom_dictionaries->GetDictionary(partition_key_, |
+ &host_zoom_dictionary)) { |
+ std::vector<std::string> keys_to_remove; |
+ for (base::DictionaryValue::Iterator i(*host_zoom_dictionary); !i.IsAtEnd(); |
+ i.Advance()) { |
+ const std::string& host(i.key()); |
+ double zoom_level = 0; |
+ |
+ bool success = i.value().GetAsDouble(&zoom_level); |
+ DCHECK(success); |
+ |
+ if (host.empty() || |
+ content::ZoomValuesEqual(zoom_level, |
+ host_zoom_map_->GetDefaultZoomLevel())) { |
+ keys_to_remove.push_back(host); |
+ continue; |
+ } |
+ |
+ host_zoom_map_->SetZoomLevelForHost(host, zoom_level); |
+ } |
+ |
+ // Sanitize prefs to remove entries that match the default zoom level and/or |
+ // have an empty host. |
+ { |
+ DictionaryPrefUpdate update(pref_service_, prefs::kPerHostZoomLevels); |
+ base::DictionaryValue* host_zoom_dictionaries = update.Get(); |
+ base::DictionaryValue* host_zoom_dictionary; |
+ if (!host_zoom_dictionaries->GetDictionary(partition_key_, |
+ &host_zoom_dictionary)) { |
+ host_zoom_dictionary = new base::DictionaryValue(); |
+ host_zoom_dictionaries->Set(partition_key_, host_zoom_dictionary); |
+ } |
+ |
+ for (std::vector<std::string>::const_iterator it = keys_to_remove.begin(); |
+ it != keys_to_remove.end(); |
+ ++it) { |
+ host_zoom_dictionary->RemoveWithoutPathExpansion(*it, NULL); |
+ } |
+ } |
+ } |
+ zoom_subscription_ = host_zoom_map_->AddZoomLevelChangedCallback(base::Bind( |
+ &ChromeZoomLevelPrefs::OnZoomLevelChanged, base::Unretained(this))); |
+} |
+ |
+void ChromeZoomLevelPrefs::OnDefaultZoomLevelChanged(const std::string& key) { |
+ // Push changes to the default zoom level to the HostZoomMap; all |
+ // other consumers will get it from there. |
+ if (key == default_zoom_level_path_) { |
+ host_zoom_map_->SetDefaultZoomLevel( |
+ pref_service_->GetDouble(default_zoom_level_path_.c_str())); |
+ } |
+} |
+ |
+void ChromeZoomLevelPrefs::SetDefaultZoomLevel(double level) { |
+ if (pref_service_->FindPreference(default_zoom_level_path_.c_str())) { |
+ pref_service_->SetDouble(default_zoom_level_path_.c_str(), level); |
+ } else { |
+ DictionaryPrefUpdate update(pref_service_, prefs::kDefaultZoomLevel); |
+ update->SetDouble(partition_key_, level); |
+ // For unregistered paths, OnDefaultZoomLevelChanged won't be called, so |
+ // set this manually. |
+ host_zoom_map_->SetDefaultZoomLevel(level); |
+ } |
+} |
+ |
+void ChromeZoomLevelPrefs::OnZoomLevelChanged( |
+ const content::HostZoomMap::ZoomLevelChange& change) { |
+ if (change.mode != content::HostZoomMap::ZOOM_CHANGED_FOR_HOST) |
+ return; |
+ double level = change.zoom_level; |
+ // Note: the following will create the dictionary if it doesn't already exist. |
+ DictionaryPrefUpdate update(pref_service_, prefs::kPerHostZoomLevels); |
+ base::DictionaryValue* host_zoom_dictionaries = update.Get(); |
+ DCHECK(host_zoom_dictionaries); |
+ |
+ base::DictionaryValue* host_zoom_dictionary; |
+ if (!host_zoom_dictionaries->GetDictionary(partition_key_, |
+ &host_zoom_dictionary)) { |
+ host_zoom_dictionary = new base::DictionaryValue(); |
+ host_zoom_dictionaries->Set(partition_key_, host_zoom_dictionary); |
+ } |
+ |
+ if (content::ZoomValuesEqual(level, host_zoom_map_->GetDefaultZoomLevel())) |
+ host_zoom_dictionary->RemoveWithoutPathExpansion(change.host, NULL); |
+ else |
+ host_zoom_dictionary->SetDoubleWithoutPathExpansion(change.host, level); |
+} |
+ |
+} // namespace chrome |