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      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   CommandLine* command_line = 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
     84