Options2: Pull the trigger.

chrome/browser/ui/webui/options2/chromeos/system_settings_provider.h

+// Copyright (c) 2011 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.
+
+#ifndef CHROME_BROWSER_UI_WEBUI_OPTIONS2_CHROMEOS_SYSTEM_SETTINGS_PROVIDER_H_
+#define CHROME_BROWSER_UI_WEBUI_OPTIONS2_CHROMEOS_SYSTEM_SETTINGS_PROVIDER_H_
+
+#include <vector>
+
+#include "base/callback.h"
+#include "base/string16.h"
+#include "chrome/browser/chromeos/cros_settings_provider.h"
+#include "chrome/browser/chromeos/system/timezone_settings.h"
+#include "third_party/icu/public/i18n/unicode/timezone.h"
+
+namespace base {
+class Value;
+class ListValue;
+class StringValue;
+}
+
+namespace chromeos {
+
+class SystemSettingsProvider : public CrosSettingsProvider,
+                               public system::TimezoneSettings::Observer {
+ public:
+  explicit SystemSettingsProvider(const NotifyObserversCallback& notify_cb);
+  virtual ~SystemSettingsProvider();
+
+  // CrosSettingsProvider overrides.
+  virtual const base::Value* Get(const std::string& path) const OVERRIDE;
+  virtual bool GetTrusted(const std::string& path,
+                          const base::Closure& callback) OVERRIDE;
+  virtual bool HandlesSetting(const std::string& path) const OVERRIDE;
+  virtual void Reload() OVERRIDE;
+
+  // Overridden from TimezoneSettings::Observer:
+  virtual void TimezoneChanged(const icu::TimeZone& timezone) OVERRIDE;
+
+  // Creates the map of timezones used by the options page.
+  base::ListValue* GetTimezoneList();
+
+ private:
+  // CrosSettingsProvider overrides.
+  virtual void DoSet(const std::string& path,
+                     const base::Value& in_value) OVERRIDE;
+
+  // Gets timezone name.
+  static string16 GetTimezoneName(const icu::TimeZone& timezone);
+
+  // Gets timezone ID which is also used as timezone pref value.
+  static string16 GetTimezoneID(const icu::TimeZone& timezone);
+
+  // Gets timezone object from its id.
+  const icu::TimeZone* GetTimezone(const string16& timezone_id);
+
+  // Gets a timezone id from a timezone in |timezones_| that has the same
+  // rule of given |timezone|.
+  // One timezone could have multiple timezones,
+  // e.g.
+  //   US/Pacific == America/Los_Angeles
+  // We should always use the known timezone id when passing back as
+  // pref values.
+  string16 GetKnownTimezoneID(const icu::TimeZone& timezone) const;
+
+  // Timezones.
+  std::vector<icu::TimeZone*> timezones_;
+
+  scoped_ptr<base::Value> timezone_value_;
+
+  DISALLOW_COPY_AND_ASSIGN(SystemSettingsProvider);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_UI_WEBUI_OPTIONS2_CHROMEOS_SYSTEM_SETTINGS_PROVIDER_H_