Store profile avatar to preferences

chrome/browser/profiles/profile_info_cache.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_PROFILES_PROFILE_INFO_CACHE_H_
+#define CHROME_BROWSER_PROFILES_PROFILE_INFO_CACHE_H_
+#pragma once
+
+#include <string>
+#include <vector>
+
+#include "base/basictypes.h"
+#include "base/file_path.h"
+#include "base/string16.h"
+
+namespace gfx {
+class Image;
+}
+
+class DictionaryValue;
+class PrefService;
+
+
+// This class saves various information about profiles to local preferences.
+// This cache can be used to display a list of profiles without having to
+// actually load the profiles from disk.
+class ProfileInfoCache {
+ public:
+  explicit ProfileInfoCache(const FilePath& user_data_dir);
+
+  void AddProfileToCache(const FilePath& profile_path,
+                         const string16& name,
+                         size_t icon_index);
+  void DeleteProfileFromCache(const FilePath& profile_path);
+
+  size_t GetNumberOfProfiles() const;
+  string16 GetNameOfProfileAtIndex(size_t index) const;
+  FilePath GetPathOfProfileAtIndex(size_t index) const;
+  const gfx::Image& GetAvatarIconOfProfileAtIndex(size_t index) const;
+
+  void SetNameOfProfileAtIndex(size_t index, const string16& name);
+  void SetAvatarIconOfProfileAtIndex(size_t index, size_t icon_index);
+
+  // Gets the number of default avatar icons that exist.
+  static size_t GetDefaultAvatarIconCount();
+  // Gets the resource ID of the default avatar icon at |index|.
+  static int GetDefaultAvatarIconResourceIDAtIndex(size_t index);
+
+  // Register cache related preferences in Local State.
+  static void RegisterPrefs(PrefService* prefs);
+
+ private:
+  const DictionaryValue* GetInfoForProfileAtIndex(size_t index) const;
+  // Saves the profile info to a cache and takes ownership of |info|.
+  // Currently the only information that is cached is the profiles name and
+  // avatar icon.
+  void SetInfoForProfileAtIndex(size_t index, DictionaryValue* info);
+  std::string CacheKeyFromProfilePath(const FilePath& profile_path) const;
+  std::vector<std::string>::iterator FindPositionForProfile(
+      std::string search_key,
+      const string16& search_name);
+
+  std::vector<std::string> sorted_keys_;
+  FilePath user_data_dir_;
+
+  DISALLOW_COPY_AND_ASSIGN(ProfileInfoCache);
+};
+
+#endif  // CHROME_BROWSER_PROFILES_PROFILE_INFO_CACHE_H_