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      1 // Copyright 2013 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/apps/shortcut_manager.h"
      6 
      7 #include "apps/pref_names.h"
      8 #include "base/bind.h"
      9 #include "base/command_line.h"
     10 #include "base/compiler_specific.h"
     11 #include "base/prefs/pref_service.h"
     12 #include "base/strings/string16.h"
     13 #include "base/strings/utf_string_conversions.h"
     14 #include "chrome/browser/browser_process.h"
     15 #include "chrome/browser/chrome_notification_types.h"
     16 #include "chrome/browser/extensions/extension_service.h"
     17 #include "chrome/browser/extensions/extension_system.h"
     18 #include "chrome/browser/profiles/profile.h"
     19 #include "chrome/browser/profiles/profile_info_cache.h"
     20 #include "chrome/browser/profiles/profile_manager.h"
     21 #include "chrome/browser/shell_integration.h"
     22 #include "chrome/browser/ui/web_applications/web_app_ui.h"
     23 #include "chrome/browser/web_applications/web_app.h"
     24 #include "chrome/common/chrome_switches.h"
     25 #include "chrome/common/extensions/extension_set.h"
     26 #include "content/public/browser/browser_thread.h"
     27 #include "content/public/browser/notification_details.h"
     28 #include "content/public/browser/notification_source.h"
     29 
     30 #if defined(OS_MACOSX)
     31 #include "apps/app_shim/app_shim_mac.h"
     32 #endif
     33 
     34 using extensions::Extension;
     35 
     36 namespace {
     37 
     38 // Creates a shortcut for an application in the applications menu, if there is
     39 // not already one present.
     40 void CreateShortcutsInApplicationsMenu(
     41     const ShellIntegration::ShortcutInfo& shortcut_info) {
     42   ShellIntegration::ShortcutLocations creation_locations;
     43   creation_locations.in_applications_menu = true;
     44   // Create the shortcut in the Chrome Apps subdir.
     45   creation_locations.applications_menu_subdir =
     46       web_app::GetAppShortcutsSubdirName();
     47   web_app::CreateShortcuts(shortcut_info, creation_locations,
     48                            web_app::SHORTCUT_CREATION_AUTOMATED);
     49 }
     50 
     51 bool ShouldCreateShortcutFor(const extensions::Extension* extension) {
     52   return extension->is_platform_app() &&
     53       extension->location() != extensions::Manifest::COMPONENT &&
     54       extension->ShouldDisplayInAppLauncher();
     55 }
     56 
     57 }  // namespace
     58 
     59 AppShortcutManager::AppShortcutManager(Profile* profile)
     60     : profile_(profile),
     61       is_profile_info_cache_observer_(false),
     62       prefs_(profile->GetPrefs()),
     63       weak_factory_(this) {
     64   // Use of g_browser_process requires that we are either on the UI thread, or
     65   // there are no threads initialized (such as in unit tests).
     66   DCHECK(!content::BrowserThread::IsThreadInitialized(
     67              content::BrowserThread::UI) ||
     68          content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
     69 
     70   registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_INSTALLED,
     71                  content::Source<Profile>(profile_));
     72   registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_UNINSTALLED,
     73                  content::Source<Profile>(profile_));
     74   // Wait for extensions to be ready before running OnceOffCreateShortcuts.
     75   registrar_.Add(this, chrome::NOTIFICATION_EXTENSIONS_READY,
     76                  content::Source<Profile>(profile_));
     77 
     78   ProfileManager* profile_manager = g_browser_process->profile_manager();
     79   // profile_manager might be NULL in testing environments.
     80   if (profile_manager) {
     81     profile_manager->GetProfileInfoCache().AddObserver(this);
     82     is_profile_info_cache_observer_ = true;
     83   }
     84 }
     85 
     86 AppShortcutManager::~AppShortcutManager() {
     87   if (g_browser_process && is_profile_info_cache_observer_) {
     88     ProfileManager* profile_manager = g_browser_process->profile_manager();
     89     // profile_manager might be NULL in testing environments or during shutdown.
     90     if (profile_manager)
     91       profile_manager->GetProfileInfoCache().RemoveObserver(this);
     92   }
     93 }
     94 
     95 void AppShortcutManager::Observe(int type,
     96                                  const content::NotificationSource& source,
     97                                  const content::NotificationDetails& details) {
     98   switch (type) {
     99     case chrome::NOTIFICATION_EXTENSIONS_READY: {
    100       OnceOffCreateShortcuts();
    101       break;
    102     }
    103     case chrome::NOTIFICATION_EXTENSION_INSTALLED: {
    104 #if defined(OS_MACOSX)
    105       if (!apps::IsAppShimsEnabled())
    106         break;
    107 #endif  // defined(OS_MACOSX)
    108 
    109       const extensions::InstalledExtensionInfo* installed_info =
    110           content::Details<const extensions::InstalledExtensionInfo>(details)
    111               .ptr();
    112       const Extension* extension = installed_info->extension;
    113       if (ShouldCreateShortcutFor(extension)) {
    114         // If the app is being updated, update any existing shortcuts but do not
    115         // create new ones. If it is being installed, automatically create a
    116         // shortcut in the applications menu (e.g., Start Menu).
    117         base::Callback<void(const ShellIntegration::ShortcutInfo&)>
    118             create_or_update;
    119         if (installed_info->is_update) {
    120           string16 old_title = UTF8ToUTF16(installed_info->old_name);
    121           create_or_update = base::Bind(&web_app::UpdateAllShortcuts,
    122                                         old_title);
    123         } else {
    124           create_or_update = base::Bind(&CreateShortcutsInApplicationsMenu);
    125         }
    126 
    127         web_app::UpdateShortcutInfoAndIconForApp(*extension, profile_,
    128                                                  create_or_update);
    129       }
    130       break;
    131     }
    132     case chrome::NOTIFICATION_EXTENSION_UNINSTALLED: {
    133       const Extension* extension = content::Details<const Extension>(
    134           details).ptr();
    135       DeleteApplicationShortcuts(extension);
    136       break;
    137     }
    138     default:
    139       NOTREACHED();
    140   }
    141 }
    142 
    143 void AppShortcutManager::OnProfileWillBeRemoved(
    144     const base::FilePath& profile_path) {
    145   if (profile_path != profile_->GetPath())
    146     return;
    147   content::BrowserThread::PostTask(
    148       content::BrowserThread::FILE, FROM_HERE,
    149       base::Bind(&web_app::internals::DeleteAllShortcutsForProfile,
    150                  profile_path));
    151 }
    152 
    153 void AppShortcutManager::OnceOffCreateShortcuts() {
    154   bool was_enabled = prefs_->GetBoolean(apps::prefs::kShortcutsHaveBeenCreated);
    155 
    156   // Creation of shortcuts on Mac currently sits behind --enable-app-shims.
    157   // Until it is enabled permanently, we need to check the flag, and set the
    158   // pref accordingly.
    159 #if defined(OS_MACOSX)
    160   bool is_now_enabled = apps::IsAppShimsEnabled();
    161 #else
    162   bool is_now_enabled = true;
    163 #endif  // defined(OS_MACOSX)
    164 
    165   if (was_enabled != is_now_enabled)
    166     prefs_->SetBoolean(apps::prefs::kShortcutsHaveBeenCreated, is_now_enabled);
    167 
    168   if (was_enabled || !is_now_enabled)
    169     return;
    170 
    171   // Check if extension system/service are available. They might not be in
    172   // tests.
    173   extensions::ExtensionSystem* extension_system;
    174   ExtensionServiceInterface* extension_service;
    175   if (!(extension_system = extensions::ExtensionSystem::Get(profile_)) ||
    176       !(extension_service = extension_system->extension_service()))
    177     return;
    178 
    179   // Create an applications menu shortcut for each app in this profile.
    180   const ExtensionSet* apps = extension_service->extensions();
    181   for (ExtensionSet::const_iterator it = apps->begin();
    182        it != apps->end(); ++it) {
    183     if (ShouldCreateShortcutFor(it->get()))
    184       web_app::UpdateShortcutInfoAndIconForApp(
    185           *it->get(), profile_, base::Bind(&CreateShortcutsInApplicationsMenu));
    186   }
    187 }
    188 
    189 void AppShortcutManager::DeleteApplicationShortcuts(
    190     const Extension* extension) {
    191   ShellIntegration::ShortcutInfo delete_info =
    192       web_app::ShortcutInfoForExtensionAndProfile(extension, profile_);
    193   web_app::DeleteAllShortcuts(delete_info);
    194 }
    195