chrome/browser/apps/ephemeral_app_launcher.cc

   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/ephemeral_app_launcher.h"
   6
   7 #include "chrome/browser/extensions/extension_install_prompt.h"
   8 #include "chrome/browser/extensions/extension_service.h"
   9 #include "chrome/browser/extensions/extension_util.h"
  10 #include "chrome/browser/profiles/profile.h"
  11 #include "chrome/browser/ui/extensions/application_launch.h"
  12 #include "chrome/browser/ui/extensions/extension_enable_flow.h"
  13 #include "content/public/browser/web_contents.h"
  14 #include "extensions/browser/extension_registry.h"
  15 #include "extensions/browser/extension_system.h"
  16 #include "extensions/common/permissions/permissions_data.h"
  17
  18 using content::WebContents;
  19 using extensions::Extension;
  20 using extensions::ExtensionSystem;
  21 using extensions::WebstoreInstaller;
  22
  23 namespace {
  24
  25 const char kInvalidManifestError[] = "Invalid manifest";
  26 const char kExtensionTypeError[] = "Ephemeral extensions are not permitted";
  27 const char kLaunchAbortedError[] = "Launch aborted";
  28
  29 Profile* ProfileForWebContents(content::WebContents* contents) {
  30   if (!contents)
  31     return NULL;
  32
  33   return Profile::FromBrowserContext(contents->GetBrowserContext());
  34 }
  35
  36 gfx::NativeWindow NativeWindowForWebContents(content::WebContents* contents) {
  37   if (!contents)
  38     return NULL;
  39
  40   return contents->GetTopLevelNativeWindow();
  41 }
  42
  43 }  // namespace
  44
  45 // static
  46 scoped_refptr<EphemeralAppLauncher>
  47 EphemeralAppLauncher::CreateForLauncher(
  48     const std::string& webstore_item_id,
  49     Profile* profile,
  50     gfx::NativeWindow parent_window,
  51     const Callback& callback) {
  52   scoped_refptr<EphemeralAppLauncher> installer =
  53       new EphemeralAppLauncher(webstore_item_id,
  54                                profile,
  55                                parent_window,
  56                                callback);
  57   installer->set_install_source(WebstoreInstaller::INSTALL_SOURCE_APP_LAUNCHER);
  58   return installer;
  59 }
  60
  61 // static
  62 scoped_refptr<EphemeralAppLauncher>
  63 EphemeralAppLauncher::CreateForLink(
  64     const std::string& webstore_item_id,
  65     content::WebContents* web_contents) {
  66   scoped_refptr<EphemeralAppLauncher> installer =
  67       new EphemeralAppLauncher(webstore_item_id,
  68                                web_contents,
  69                                Callback());
  70   installer->set_install_source(WebstoreInstaller::INSTALL_SOURCE_OTHER);
  71   return installer;
  72 }
  73
  74 void EphemeralAppLauncher::Start() {
  75   ExtensionService* extension_service =
  76       extensions::ExtensionSystem::Get(profile())->extension_service();
  77   DCHECK(extension_service);
  78
  79   const Extension* extension = extension_service->GetInstalledExtension(id());
  80   if (extension) {
  81     if (extensions::util::IsAppLaunchableWithoutEnabling(extension->id(),
  82                                                          profile())) {
  83       LaunchApp(extension);
  84       InvokeCallback(std::string());
  85       return;
  86     }
  87
  88     // The ephemeral app may have been updated and disabled as it requests
  89     // more permissions. In this case we should always prompt before
  90     // launching.
  91     extension_enable_flow_.reset(
  92         new ExtensionEnableFlow(profile(), extension->id(), this));
  93     if (web_contents())
  94       extension_enable_flow_->StartForWebContents(web_contents());
  95     else
  96       extension_enable_flow_->StartForNativeWindow(parent_window_);
  97
  98     // Keep this object alive until the enable flow is complete.
  99     AddRef();  // Balanced in WebstoreStandaloneInstaller::CompleteInstall.
 100     return;
 101   }
 102
 103   // Fetch the app from the webstore.
 104   StartObserving();
 105   BeginInstall();
 106 }
 107
 108 EphemeralAppLauncher::EphemeralAppLauncher(const std::string& webstore_item_id,
 109                                            Profile* profile,
 110                                            gfx::NativeWindow parent_window,
 111                                            const Callback& callback)
 112     : WebstoreStandaloneInstaller(webstore_item_id, profile, callback),
 113       extension_registry_observer_(this),
 114       parent_window_(parent_window),
 115       dummy_web_contents_(
 116           WebContents::Create(WebContents::CreateParams(profile))) {
 117 }
 118
 119 EphemeralAppLauncher::EphemeralAppLauncher(const std::string& webstore_item_id,
 120                                            content::WebContents* web_contents,
 121                                            const Callback& callback)
 122     : WebstoreStandaloneInstaller(webstore_item_id,
 123                                   ProfileForWebContents(web_contents),
 124                                   callback),
 125       content::WebContentsObserver(web_contents),
 126       extension_registry_observer_(this),
 127       parent_window_(NativeWindowForWebContents(web_contents)) {
 128 }
 129
 130 EphemeralAppLauncher::~EphemeralAppLauncher() {}
 131
 132 void EphemeralAppLauncher::StartObserving() {
 133   extension_registry_observer_.Add(
 134       extensions::ExtensionRegistry::Get(profile()));
 135 }
 136
 137 void EphemeralAppLauncher::LaunchApp(const Extension* extension) const {
 138   DCHECK(extension);
 139   if (!extension->is_app()) {
 140     LOG(ERROR) << "Unable to launch extension " << extension->id()
 141                << ". It is not an app.";
 142     return;
 143   }
 144
 145   AppLaunchParams params(profile(), extension, NEW_FOREGROUND_TAB);
 146   params.desktop_type =
 147       chrome::GetHostDesktopTypeForNativeWindow(parent_window_);
 148   OpenApplication(params);
 149 }
 150
 151 bool EphemeralAppLauncher::CheckRequestorAlive() const {
 152   return dummy_web_contents_.get() != NULL || web_contents() != NULL;
 153 }
 154
 155 const GURL& EphemeralAppLauncher::GetRequestorURL() const {
 156   return GURL::EmptyGURL();
 157 }
 158
 159 bool EphemeralAppLauncher::ShouldShowPostInstallUI() const {
 160   return false;
 161 }
 162
 163 bool EphemeralAppLauncher::ShouldShowAppInstalledBubble() const {
 164   return false;
 165 }
 166
 167 WebContents* EphemeralAppLauncher::GetWebContents() const {
 168   return web_contents() ? web_contents() : dummy_web_contents_.get();
 169 }
 170
 171 scoped_ptr<ExtensionInstallPrompt::Prompt>
 172 EphemeralAppLauncher::CreateInstallPrompt() const {
 173   DCHECK(extension_.get() != NULL);
 174
 175   // Skip the prompt by returning null if the app does not need to display
 176   // permission warnings.
 177   extensions::PermissionMessages permissions =
 178       extensions::PermissionsData::GetPermissionMessages(extension_.get());
 179   if (permissions.empty())
 180     return scoped_ptr<ExtensionInstallPrompt::Prompt>();
 181
 182   return make_scoped_ptr(new ExtensionInstallPrompt::Prompt(
 183       ExtensionInstallPrompt::LAUNCH_PROMPT));
 184 }
 185
 186 bool EphemeralAppLauncher::CheckInlineInstallPermitted(
 187     const base::DictionaryValue& webstore_data,
 188     std::string* error) const {
 189   *error = "";
 190   return true;
 191 }
 192
 193 bool EphemeralAppLauncher::CheckRequestorPermitted(
 194     const base::DictionaryValue& webstore_data,
 195     std::string* error) const {
 196   *error = "";
 197   return true;
 198 }
 199
 200 bool EphemeralAppLauncher::CheckInstallValid(
 201     const base::DictionaryValue& manifest,
 202     std::string* error) {
 203   extension_ = Extension::Create(
 204       base::FilePath(),
 205       extensions::Manifest::INTERNAL,
 206       manifest,
 207       Extension::REQUIRE_KEY |
 208           Extension::FROM_WEBSTORE |
 209           Extension::IS_EPHEMERAL,
 210       id(),
 211       error);
 212   if (!extension_.get()) {
 213     *error = kInvalidManifestError;
 214     return false;
 215   }
 216
 217   if (!extension_->is_app()) {
 218     *error = kExtensionTypeError;
 219     return false;
 220   }
 221
 222   return true;
 223 }
 224
 225 scoped_ptr<ExtensionInstallPrompt>
 226 EphemeralAppLauncher::CreateInstallUI() {
 227   if (web_contents())
 228     return make_scoped_ptr(new ExtensionInstallPrompt(web_contents()));
 229
 230   return make_scoped_ptr(
 231       new ExtensionInstallPrompt(profile(), parent_window_, NULL));
 232 }
 233
 234 scoped_ptr<WebstoreInstaller::Approval>
 235 EphemeralAppLauncher::CreateApproval() const {
 236   scoped_ptr<WebstoreInstaller::Approval> approval =
 237       WebstoreStandaloneInstaller::CreateApproval();
 238   approval->is_ephemeral = true;
 239   return approval.Pass();
 240 }
 241
 242 void EphemeralAppLauncher::CompleteInstall(const std::string& error) {
 243   if (!error.empty())
 244     WebstoreStandaloneInstaller::CompleteInstall(error);
 245
 246   // If the installation succeeds, we reach this point as a result of
 247   // chrome::NOTIFICATION_EXTENSION_INSTALLED, but this is broadcasted before
 248   // ExtensionService has added the extension to its list of installed
 249   // extensions and is too early to launch the app. Instead, we will launch at
 250   // EphemeralAppLauncher::OnExtensionLoaded().
 251   // TODO(tmdiep): Refactor extensions/WebstoreInstaller or
 252   // WebstoreStandaloneInstaller to support this cleanly.
 253 }
 254
 255 void EphemeralAppLauncher::WebContentsDestroyed() {
 256   AbortInstall();
 257 }
 258
 259 void EphemeralAppLauncher::OnExtensionLoaded(
 260     content::BrowserContext* browser_context,
 261     const Extension* extension) {
 262   if (extension->id() == id()) {
 263     LaunchApp(extension);
 264     WebstoreStandaloneInstaller::CompleteInstall(std::string());
 265   }
 266 }
 267
 268 void EphemeralAppLauncher::ExtensionEnableFlowFinished() {
 269   ExtensionService* extension_service =
 270       extensions::ExtensionSystem::Get(profile())->extension_service();
 271   DCHECK(extension_service);
 272
 273   const Extension* extension = extension_service->GetExtensionById(id(), false);
 274   if (extension) {
 275     LaunchApp(extension);
 276     WebstoreStandaloneInstaller::CompleteInstall(std::string());
 277   } else {
 278     WebstoreStandaloneInstaller::CompleteInstall(kLaunchAbortedError);
 279   }
 280 }
 281
 282 void EphemeralAppLauncher::ExtensionEnableFlowAborted(bool user_initiated) {
 283   WebstoreStandaloneInstaller::CompleteInstall(kLaunchAbortedError);
 284 }