chrome/browser/extensions/chrome_process_manager_delegate.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 "chrome/browser/extensions/chrome_process_manager_delegate.h"
   6
   7 #include "base/command_line.h"
   8 #include "base/logging.h"
   9 #include "chrome/browser/browser_process.h"
  10 #include "chrome/browser/chrome_notification_types.h"
  11 #include "chrome/browser/profiles/profile.h"
  12 #include "chrome/browser/profiles/profile_manager.h"
  13 #include "chrome/browser/ui/browser.h"
  14 #include "chrome/browser/ui/browser_finder.h"
  15 #include "chrome/common/chrome_switches.h"
  16 #include "content/public/browser/notification_service.h"
  17 #include "extensions/browser/extension_system.h"
  18 #include "extensions/browser/process_manager.h"
  19 #include "extensions/common/one_shot_event.h"
  20
  21 namespace extensions {
  22
  23 ChromeProcessManagerDelegate::ChromeProcessManagerDelegate() {
  24   registrar_.Add(this,
  25                  chrome::NOTIFICATION_BROWSER_WINDOW_READY,
  26                  content::NotificationService::AllSources());
  27   registrar_.Add(this,
  28                  chrome::NOTIFICATION_PROFILE_CREATED,
  29                  content::NotificationService::AllSources());
  30   registrar_.Add(this,
  31                  chrome::NOTIFICATION_PROFILE_DESTROYED,
  32                  content::NotificationService::AllSources());
  33 }
  34
  35 ChromeProcessManagerDelegate::~ChromeProcessManagerDelegate() {
  36 }
  37
  38 bool ChromeProcessManagerDelegate::IsBackgroundPageAllowed(
  39     content::BrowserContext* context) const {
  40   Profile* profile = static_cast<Profile*>(context);
  41
  42   // Disallow if the current session is a Guest mode session but the current
  43   // browser context is *not* off-the-record. Such context is artificial and
  44   // background page shouldn't be created in it.
  45   // http://crbug.com/329498
  46   return !(profile->IsGuestSession() && !profile->IsOffTheRecord());
  47 }
  48
  49 bool ChromeProcessManagerDelegate::DeferCreatingStartupBackgroundHosts(
  50     content::BrowserContext* context) const {
  51   Profile* profile = static_cast<Profile*>(context);
  52
  53   // The profile may not be valid yet if it is still being initialized.
  54   // In that case, defer loading, since it depends on an initialized profile.
  55   // Background hosts will be loaded later via NOTIFICATION_PROFILE_CREATED.
  56   // http://crbug.com/222473
  57   if (!g_browser_process->profile_manager()->IsValidProfile(profile))
  58     return true;
  59
  60   // There are no browser windows open and the browser process was
  61   // started to show the app launcher. Background hosts will be loaded later
  62   // via NOTIFICATION_BROWSER_WINDOW_READY. http://crbug.com/178260
  63   return chrome::GetTotalBrowserCountForProfile(profile) == 0 &&
  64          CommandLine::ForCurrentProcess()->HasSwitch(switches::kShowAppList);
  65 }
  66
  67 void ChromeProcessManagerDelegate::Observe(
  68     int type,
  69     const content::NotificationSource& source,
  70     const content::NotificationDetails& details) {
  71   switch (type) {
  72     case chrome::NOTIFICATION_BROWSER_WINDOW_READY: {
  73       Browser* browser = content::Source<Browser>(source).ptr();
  74       OnBrowserWindowReady(browser);
  75       break;
  76     }
  77     case chrome::NOTIFICATION_PROFILE_CREATED: {
  78       Profile* profile = content::Source<Profile>(source).ptr();
  79       OnProfileCreated(profile);
  80       break;
  81     }
  82     case chrome::NOTIFICATION_PROFILE_DESTROYED: {
  83       Profile* profile = content::Source<Profile>(source).ptr();
  84       OnProfileDestroyed(profile);
  85       break;
  86     }
  87     default:
  88       NOTREACHED();
  89   }
  90 }
  91
  92 void ChromeProcessManagerDelegate::OnBrowserWindowReady(Browser* browser) {
  93   Profile* profile = browser->profile();
  94   DCHECK(profile);
  95
  96   // If the extension system isn't ready yet the background hosts will be
  97   // created automatically when it is.
  98   ExtensionSystem* system = ExtensionSystem::Get(profile);
  99   if (!system->ready().is_signaled())
 100     return;
 101
 102   // Inform the process manager for this profile that the window is ready.
 103   // We continue to observe the notification in case browser windows open for
 104   // a related incognito profile or other regular profiles.
 105   ProcessManager* manager = system->process_manager();
 106   if (!manager)  // Tests may not have a process manager.
 107     return;
 108   DCHECK_EQ(profile, manager->GetBrowserContext());
 109   manager->MaybeCreateStartupBackgroundHosts();
 110
 111   // For incognito profiles also inform the original profile's process manager
 112   // that the window is ready. This will usually be a no-op because the
 113   // original profile's process manager should have been informed when the
 114   // non-incognito window opened.
 115   if (profile->IsOffTheRecord()) {
 116     Profile* original_profile = profile->GetOriginalProfile();
 117     ProcessManager* original_manager =
 118         ExtensionSystem::Get(original_profile)->process_manager();
 119     DCHECK(original_manager);
 120     DCHECK_EQ(original_profile, original_manager->GetBrowserContext());
 121     original_manager->MaybeCreateStartupBackgroundHosts();
 122   }
 123 }
 124
 125 void ChromeProcessManagerDelegate::OnProfileCreated(Profile* profile) {
 126   // Incognito profiles are handled by their original profile.
 127   if (profile->IsOffTheRecord())
 128     return;
 129
 130   // The profile can be created before the extension system is ready.
 131   ProcessManager* manager = ExtensionSystem::Get(profile)->process_manager();
 132   if (!manager)
 133     return;
 134
 135   // The profile might have been initialized asynchronously (in parallel with
 136   // extension system startup). Now that initialization is complete the
 137   // ProcessManager can load deferred background pages.
 138   manager->MaybeCreateStartupBackgroundHosts();
 139 }
 140
 141 void ChromeProcessManagerDelegate::OnProfileDestroyed(Profile* profile) {
 142   // Close background hosts when the last profile is closed so that they
 143   // have time to shutdown various objects on different threads. The
 144   // ProfileManager destructor is called too late in the shutdown sequence.
 145   // http://crbug.com/15708
 146   ProcessManager* manager = ExtensionSystem::Get(profile)->process_manager();
 147   if (manager)
 148     manager->CloseBackgroundHosts();
 149
 150   // If this profile owns an incognito profile, but it is destroyed before the
 151   // incognito profile is destroyed, then close the incognito background hosts
 152   // as well. This happens in a few tests. http://crbug.com/138843
 153   if (!profile->IsOffTheRecord() && profile->HasOffTheRecordProfile()) {
 154     ProcessManager* incognito_manager =
 155         ExtensionSystem::Get(profile->GetOffTheRecordProfile())
 156             ->process_manager();
 157     if (incognito_manager)
 158       incognito_manager->CloseBackgroundHosts();
 159   }
 160 }
 161
 162 }  // namespace extensions