components/session_manager/core/session_manager.cc

   1 // Copyright 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 "components/session_manager/core/session_manager.h"
   6
   7 #include "base/logging.h"
   8
   9 #if defined(OS_CHROMEOS)
  10 #include "base/command_line.h"
  11 #include "base/sys_info.h"
  12 #include "chromeos/chromeos_switches.h"
  13 #endif
  14
  15 namespace session_manager {
  16
  17 // static
  18 SessionManager* SessionManager::instance = NULL;
  19
  20 SessionManager::SessionManager() : session_state_(SESSION_STATE_UNKNOWN) {
  21   DCHECK(!SessionManager::Get());
  22   SessionManager::SetInstance(this);
  23 }
  24
  25 SessionManager::~SessionManager() {
  26   DCHECK(instance == this);
  27   SessionManager::SetInstance(NULL);
  28 }
  29
  30 // static
  31 SessionManager* SessionManager::Get() {
  32   return SessionManager::instance;
  33 }
  34
  35 void SessionManager::SetSessionState(SessionState state) {
  36   VLOG(1) << "Changing session state to: " << state;
  37
  38   if (session_state_ != state) {
  39     // TODO(nkostylev): Notify observers about the state change.
  40     // TODO(nkostylev): Add code to process session state change and probably
  41     // replace delegate_ if needed.
  42     session_state_ = state;
  43   }
  44 }
  45
  46 void SessionManager::Initialize(SessionManagerDelegate* delegate) {
  47   DCHECK(delegate);
  48   delegate_.reset(delegate);
  49   delegate_->SetSessionManager(this);
  50 }
  51
  52 // static
  53 void SessionManager::SetInstance(SessionManager* session_manager) {
  54   SessionManager::instance = session_manager;
  55 }
  56
  57 void SessionManager::Start() {
  58   delegate_->Start();
  59 }
  60
  61 // static
  62 bool SessionManager::HasBrowserRestarted() {
  63 #if defined(OS_CHROMEOS)
  64   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
  65   return base::SysInfo::IsRunningOnChromeOS() &&
  66          command_line->HasSwitch(chromeos::switches::kLoginUser);
  67 #else
  68   return false;
  69 #endif
  70 }
  71
  72 SessionManagerDelegate::SessionManagerDelegate() : session_manager_(NULL) {
  73 }
  74
  75 SessionManagerDelegate::~SessionManagerDelegate() {
  76 }
  77
  78 void SessionManagerDelegate::SetSessionManager(
  79     session_manager::SessionManager* session_manager) {
  80   session_manager_ = session_manager;
  81 }
  82
  83 }  // namespace session_manager