src/chrome/browser/ui/webui/ntp/app_launcher_handler.cc

   1 // Copyright (c) 2012 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/ui/webui/ntp/app_launcher_handler.h"
   6
   7 #include <vector>
   8
   9 #include "apps/metrics_names.h"
  10 #include "base/auto_reset.h"
  11 #include "base/bind.h"
  12 #include "base/bind_helpers.h"
  13 #include "base/i18n/rtl.h"
  14 #include "base/metrics/field_trial.h"
  15 #include "base/metrics/histogram.h"
  16 #include "base/prefs/pref_service.h"
  17 #include "base/prefs/scoped_user_pref_update.h"
  18 #include "base/strings/utf_string_conversions.h"
  19 #include "base/values.h"
  20 #include "chrome/browser/browser_process.h"
  21 #include "chrome/browser/chrome_notification_types.h"
  22 #include "chrome/browser/extensions/crx_installer.h"
  23 #include "chrome/browser/extensions/extension_service.h"
  24 #include "chrome/browser/extensions/launch_util.h"
  25 #include "chrome/browser/favicon/favicon_service_factory.h"
  26 #include "chrome/browser/profiles/profile.h"
  27 #include "chrome/browser/ui/app_list/app_list_util.h"
  28 #include "chrome/browser/ui/browser_dialogs.h"
  29 #include "chrome/browser/ui/browser_finder.h"
  30 #include "chrome/browser/ui/browser_tabstrip.h"
  31 #include "chrome/browser/ui/browser_window.h"
  32 #include "chrome/browser/ui/extensions/application_launch.h"
  33 #include "chrome/browser/ui/extensions/extension_enable_flow.h"
  34 #include "chrome/browser/ui/tabs/tab_strip_model.h"
  35 #include "chrome/browser/ui/webui/extensions/extension_basic_info.h"
  36 #include "chrome/browser/ui/webui/extensions/extension_icon_source.h"
  37 #include "chrome/browser/ui/webui/ntp/core_app_launcher_handler.h"
  38 #include "chrome/browser/ui/webui/ntp/new_tab_ui.h"
  39 #include "chrome/common/extensions/extension_constants.h"
  40 #include "chrome/common/extensions/extension_icon_set.h"
  41 #include "chrome/common/extensions/manifest_handlers/app_launch_info.h"
  42 #include "chrome/common/favicon/favicon_types.h"
  43 #include "chrome/common/pref_names.h"
  44 #include "chrome/common/url_constants.h"
  45 #include "chrome/common/web_application_info.h"
  46 #include "content/public/browser/notification_service.h"
  47 #include "content/public/browser/web_ui.h"
  48 #include "content/public/common/favicon_url.h"
  49 #include "extensions/browser/app_sorting.h"
  50 #include "extensions/browser/extension_registry.h"
  51 #include "extensions/browser/extension_system.h"
  52 #include "extensions/browser/management_policy.h"
  53 #include "extensions/browser/pref_names.h"
  54 #include "extensions/common/constants.h"
  55 #include "extensions/common/extension.h"
  56 #include "extensions/common/extension_set.h"
  57 #include "grit/browser_resources.h"
  58 #include "grit/generated_resources.h"
  59 #include "ui/base/l10n/l10n_util.h"
  60 #include "ui/base/webui/web_ui_util.h"
  61 #include "ui/gfx/favicon_size.h"
  62 #include "url/gurl.h"
  63
  64 using content::WebContents;
  65 using extensions::AppSorting;
  66 using extensions::CrxInstaller;
  67 using extensions::Extension;
  68 using extensions::ExtensionPrefs;
  69 using extensions::ExtensionRegistry;
  70 using extensions::ExtensionSet;
  71 using extensions::UnloadedExtensionInfo;
  72
  73 namespace {
  74
  75 bool ShouldDisplayInNewTabPage(const Extension* app, PrefService* prefs) {
  76   bool blocked_by_policy =
  77     (app->id() == extension_misc::kWebStoreAppId ||
  78      app->id() == extension_misc::kEnterpriseWebStoreAppId) &&
  79     prefs->GetBoolean(prefs::kHideWebStoreIcon);
  80   return app->ShouldDisplayInNewTabPage() && !blocked_by_policy;
  81 }
  82
  83 void RecordAppLauncherPromoHistogram(
  84       apps::AppLauncherPromoHistogramValues value) {
  85   DCHECK_LT(value, apps::APP_LAUNCHER_PROMO_MAX);
  86   UMA_HISTOGRAM_ENUMERATION(
  87       "Apps.AppLauncherPromo", value, apps::APP_LAUNCHER_PROMO_MAX);
  88 }
  89
  90 // This is used to avoid a DCHECK due to an unhandled WebUI callback. The
  91 // JavaScript used to switch between pages sends "pageSelected" which is used
  92 // in the context of the NTP for recording metrics we don't need here.
  93 void NoOpCallback(const base::ListValue* args) {}
  94
  95 }  // namespace
  96
  97 AppLauncherHandler::AppInstallInfo::AppInstallInfo() {}
  98
  99 AppLauncherHandler::AppInstallInfo::~AppInstallInfo() {}
 100
 101 AppLauncherHandler::AppLauncherHandler(ExtensionService* extension_service)
 102     : extension_service_(extension_service),
 103       ignore_changes_(false),
 104       attempted_bookmark_app_install_(false),
 105       has_loaded_apps_(false) {
 106   if (IsAppLauncherEnabled())
 107     RecordAppLauncherPromoHistogram(apps::APP_LAUNCHER_PROMO_ALREADY_INSTALLED);
 108   else if (ShouldShowAppLauncherPromo())
 109     RecordAppLauncherPromoHistogram(apps::APP_LAUNCHER_PROMO_SHOWN);
 110 }
 111
 112 AppLauncherHandler::~AppLauncherHandler() {}
 113
 114 void AppLauncherHandler::CreateAppInfo(
 115     const Extension* extension,
 116     ExtensionService* service,
 117     base::DictionaryValue* value) {
 118   value->Clear();
 119
 120   // The Extension class 'helpfully' wraps bidi control characters that
 121   // impede our ability to determine directionality.
 122   base::string16 short_name = base::UTF8ToUTF16(extension->short_name());
 123   base::i18n::UnadjustStringForLocaleDirection(&short_name);
 124   NewTabUI::SetUrlTitleAndDirection(
 125       value,
 126       short_name,
 127       extensions::AppLaunchInfo::GetFullLaunchURL(extension));
 128
 129   base::string16 name = base::UTF8ToUTF16(extension->name());
 130   base::i18n::UnadjustStringForLocaleDirection(&name);
 131   NewTabUI::SetFullNameAndDirection(name, value);
 132
 133   bool enabled = service->IsExtensionEnabled(extension->id()) &&
 134       !service->GetTerminatedExtension(extension->id());
 135   extensions::GetExtensionBasicInfo(extension, enabled, value);
 136
 137   value->SetBoolean("mayDisable", extensions::ExtensionSystem::Get(
 138       service->profile())->management_policy()->UserMayModifySettings(
 139       extension, NULL));
 140
 141   bool icon_big_exists = true;
 142   // Instead of setting grayscale here, we do it in apps_page.js.
 143   GURL icon_big = extensions::ExtensionIconSource::GetIconURL(
 144       extension,
 145       extension_misc::EXTENSION_ICON_LARGE,
 146       ExtensionIconSet::MATCH_BIGGER,
 147       false,
 148       &icon_big_exists);
 149   value->SetString("icon_big", icon_big.spec());
 150   value->SetBoolean("icon_big_exists", icon_big_exists);
 151   bool icon_small_exists = true;
 152   GURL icon_small = extensions::ExtensionIconSource::GetIconURL(
 153       extension,
 154       extension_misc::EXTENSION_ICON_BITTY,
 155       ExtensionIconSet::MATCH_BIGGER,
 156       false,
 157       &icon_small_exists);
 158   value->SetString("icon_small", icon_small.spec());
 159   value->SetBoolean("icon_small_exists", icon_small_exists);
 160   value->SetInteger("launch_container",
 161                     extensions::AppLaunchInfo::GetLaunchContainer(extension));
 162   ExtensionPrefs* prefs = service->extension_prefs();
 163   value->SetInteger("launch_type", extensions::GetLaunchType(prefs, extension));
 164   value->SetBoolean("is_component",
 165                     extension->location() == extensions::Manifest::COMPONENT);
 166   value->SetBoolean("is_webstore",
 167       extension->id() == extension_misc::kWebStoreAppId);
 168
 169   AppSorting* sorting = prefs->app_sorting();
 170   syncer::StringOrdinal page_ordinal = sorting->GetPageOrdinal(extension->id());
 171   if (!page_ordinal.IsValid()) {
 172     // Make sure every app has a page ordinal (some predate the page ordinal).
 173     // The webstore app should be on the first page.
 174     page_ordinal = extension->id() == extension_misc::kWebStoreAppId ?
 175         sorting->CreateFirstAppPageOrdinal() :
 176         sorting->GetNaturalAppPageOrdinal();
 177     sorting->SetPageOrdinal(extension->id(), page_ordinal);
 178   }
 179   value->SetInteger("page_index",
 180       sorting->PageStringOrdinalAsInteger(page_ordinal));
 181
 182   syncer::StringOrdinal app_launch_ordinal =
 183       sorting->GetAppLaunchOrdinal(extension->id());
 184   if (!app_launch_ordinal.IsValid()) {
 185     // Make sure every app has a launch ordinal (some predate the launch
 186     // ordinal). The webstore's app launch ordinal is always set to the first
 187     // position.
 188     app_launch_ordinal = extension->id() == extension_misc::kWebStoreAppId ?
 189         sorting->CreateFirstAppLaunchOrdinal(page_ordinal) :
 190         sorting->CreateNextAppLaunchOrdinal(page_ordinal);
 191     sorting->SetAppLaunchOrdinal(extension->id(), app_launch_ordinal);
 192   }
 193   value->SetString("app_launch_ordinal", app_launch_ordinal.ToInternalValue());
 194 }
 195
 196 void AppLauncherHandler::RegisterMessages() {
 197   registrar_.Add(this, chrome::NOTIFICATION_APP_INSTALLED_TO_NTP,
 198       content::Source<WebContents>(web_ui()->GetWebContents()));
 199
 200   // Some tests don't have a local state.
 201 #if defined(ENABLE_APP_LIST)
 202   if (g_browser_process->local_state()) {
 203     local_state_pref_change_registrar_.Init(g_browser_process->local_state());
 204     local_state_pref_change_registrar_.Add(
 205         prefs::kShowAppLauncherPromo,
 206         base::Bind(&AppLauncherHandler::OnLocalStatePreferenceChanged,
 207                    base::Unretained(this)));
 208   }
 209 #endif
 210   web_ui()->RegisterMessageCallback("getApps",
 211       base::Bind(&AppLauncherHandler::HandleGetApps,
 212                  base::Unretained(this)));
 213   web_ui()->RegisterMessageCallback("launchApp",
 214       base::Bind(&AppLauncherHandler::HandleLaunchApp,
 215                  base::Unretained(this)));
 216   web_ui()->RegisterMessageCallback("setLaunchType",
 217       base::Bind(&AppLauncherHandler::HandleSetLaunchType,
 218                  base::Unretained(this)));
 219   web_ui()->RegisterMessageCallback("uninstallApp",
 220       base::Bind(&AppLauncherHandler::HandleUninstallApp,
 221                  base::Unretained(this)));
 222   web_ui()->RegisterMessageCallback("createAppShortcut",
 223       base::Bind(&AppLauncherHandler::HandleCreateAppShortcut,
 224                  base::Unretained(this)));
 225   web_ui()->RegisterMessageCallback("reorderApps",
 226       base::Bind(&AppLauncherHandler::HandleReorderApps,
 227                  base::Unretained(this)));
 228   web_ui()->RegisterMessageCallback("setPageIndex",
 229       base::Bind(&AppLauncherHandler::HandleSetPageIndex,
 230                  base::Unretained(this)));
 231   web_ui()->RegisterMessageCallback("saveAppPageName",
 232       base::Bind(&AppLauncherHandler::HandleSaveAppPageName,
 233                  base::Unretained(this)));
 234   web_ui()->RegisterMessageCallback("generateAppForLink",
 235       base::Bind(&AppLauncherHandler::HandleGenerateAppForLink,
 236                  base::Unretained(this)));
 237   web_ui()->RegisterMessageCallback("stopShowingAppLauncherPromo",
 238       base::Bind(&AppLauncherHandler::StopShowingAppLauncherPromo,
 239                  base::Unretained(this)));
 240   web_ui()->RegisterMessageCallback("onLearnMore",
 241       base::Bind(&AppLauncherHandler::OnLearnMore,
 242                  base::Unretained(this)));
 243   web_ui()->RegisterMessageCallback("pageSelected", base::Bind(&NoOpCallback));
 244 }
 245
 246 void AppLauncherHandler::Observe(int type,
 247                                  const content::NotificationSource& source,
 248                                  const content::NotificationDetails& details) {
 249   if (type == chrome::NOTIFICATION_APP_INSTALLED_TO_NTP) {
 250     highlight_app_id_ = *content::Details<const std::string>(details).ptr();
 251     if (has_loaded_apps_)
 252       SetAppToBeHighlighted();
 253     return;
 254   }
 255
 256   if (ignore_changes_ || !has_loaded_apps_)
 257     return;
 258
 259   switch (type) {
 260     case chrome::NOTIFICATION_EXTENSION_LOADED: {
 261       const Extension* extension =
 262           content::Details<const Extension>(details).ptr();
 263       if (!extension->is_app())
 264         return;
 265
 266       PrefService* prefs = Profile::FromWebUI(web_ui())->GetPrefs();
 267       if (!ShouldDisplayInNewTabPage(extension, prefs))
 268         return;
 269
 270       scoped_ptr<base::DictionaryValue> app_info(GetAppInfo(extension));
 271       if (app_info.get()) {
 272         visible_apps_.insert(extension->id());
 273
 274         ExtensionPrefs* prefs = extension_service_->extension_prefs();
 275         scoped_ptr<base::FundamentalValue> highlight(
 276             base::Value::CreateBooleanValue(
 277                 prefs->IsFromBookmark(extension->id()) &&
 278                 attempted_bookmark_app_install_));
 279         attempted_bookmark_app_install_ = false;
 280         web_ui()->CallJavascriptFunction(
 281             "ntp.appAdded", *app_info, *highlight);
 282       }
 283
 284       break;
 285     }
 286     case chrome::NOTIFICATION_EXTENSION_UNLOADED:
 287     case chrome::NOTIFICATION_EXTENSION_UNINSTALLED: {
 288       const Extension* extension = NULL;
 289       bool uninstalled = false;
 290       if (type == chrome::NOTIFICATION_EXTENSION_UNINSTALLED) {
 291         extension = content::Details<const Extension>(details).ptr();
 292         uninstalled = true;
 293       } else {  // NOTIFICATION_EXTENSION_UNLOADED
 294         if (content::Details<UnloadedExtensionInfo>(details)->reason ==
 295             UnloadedExtensionInfo::REASON_UNINSTALL) {
 296           // Uninstalls are tracked by NOTIFICATION_EXTENSION_UNINSTALLED.
 297           return;
 298         }
 299         extension = content::Details<extensions::UnloadedExtensionInfo>(
 300             details)->extension;
 301         uninstalled = false;
 302       }
 303       if (!extension->is_app())
 304         return;
 305
 306       PrefService* prefs = Profile::FromWebUI(web_ui())->GetPrefs();
 307       if (!ShouldDisplayInNewTabPage(extension, prefs))
 308         return;
 309
 310       scoped_ptr<base::DictionaryValue> app_info(GetAppInfo(extension));
 311       if (app_info.get()) {
 312         if (uninstalled)
 313           visible_apps_.erase(extension->id());
 314
 315         scoped_ptr<base::FundamentalValue> uninstall_value(
 316             base::Value::CreateBooleanValue(uninstalled));
 317         scoped_ptr<base::FundamentalValue> from_page(
 318             base::Value::CreateBooleanValue(!extension_id_prompting_.empty()));
 319         web_ui()->CallJavascriptFunction(
 320             "ntp.appRemoved", *app_info, *uninstall_value, *from_page);
 321       }
 322       break;
 323     }
 324     case chrome::NOTIFICATION_EXTENSION_LAUNCHER_REORDERED: {
 325       const std::string* id =
 326           content::Details<const std::string>(details).ptr();
 327       if (id) {
 328         const Extension* extension =
 329             extension_service_->GetInstalledExtension(*id);
 330         if (!extension) {
 331           // Extension could still be downloading or installing.
 332           return;
 333         }
 334
 335         base::DictionaryValue app_info;
 336         CreateAppInfo(extension,
 337                       extension_service_,
 338                       &app_info);
 339         web_ui()->CallJavascriptFunction("ntp.appMoved", app_info);
 340       } else {
 341         HandleGetApps(NULL);
 342       }
 343       break;
 344     }
 345     case chrome::NOTIFICATION_EXTENSION_INSTALL_ERROR: {
 346       CrxInstaller* crx_installer = content::Source<CrxInstaller>(source).ptr();
 347       if (!Profile::FromWebUI(web_ui())->IsSameProfile(
 348               crx_installer->profile())) {
 349         return;
 350       }
 351       // Fall through.
 352     }
 353     case chrome::NOTIFICATION_EXTENSION_LOAD_ERROR: {
 354       attempted_bookmark_app_install_ = false;
 355       break;
 356     }
 357     default:
 358       NOTREACHED();
 359   }
 360 }
 361
 362 void AppLauncherHandler::FillAppDictionary(base::DictionaryValue* dictionary) {
 363   // CreateAppInfo and ClearOrdinals can change the extension prefs.
 364   base::AutoReset<bool> auto_reset(&ignore_changes_, true);
 365
 366   base::ListValue* list = new base::ListValue();
 367   PrefService* prefs = Profile::FromWebUI(web_ui())->GetPrefs();
 368
 369   for (std::set<std::string>::iterator it = visible_apps_.begin();
 370        it != visible_apps_.end(); ++it) {
 371     const Extension* extension = extension_service_->GetInstalledExtension(*it);
 372     if (extension && ShouldDisplayInNewTabPage(extension, prefs)) {
 373       base::DictionaryValue* app_info = GetAppInfo(extension);
 374       list->Append(app_info);
 375     }
 376   }
 377
 378   dictionary->Set("apps", list);
 379
 380   // TODO(estade): remove these settings when the old NTP is removed. The new
 381   // NTP does it in js.
 382 #if defined(OS_MACOSX)
 383   // App windows are not yet implemented on mac.
 384   dictionary->SetBoolean("disableAppWindowLaunch", true);
 385   dictionary->SetBoolean("disableCreateAppShortcut", true);
 386 #endif
 387
 388 #if defined(OS_CHROMEOS)
 389   // Making shortcut does not make sense on ChromeOS because it does not have
 390   // a desktop.
 391   dictionary->SetBoolean("disableCreateAppShortcut", true);
 392 #endif
 393
 394   const base::ListValue* app_page_names =
 395       prefs->GetList(prefs::kNtpAppPageNames);
 396   if (!app_page_names || !app_page_names->GetSize()) {
 397     ListPrefUpdate update(prefs, prefs::kNtpAppPageNames);
 398     base::ListValue* list = update.Get();
 399     list->Set(0, new base::StringValue(
 400         l10n_util::GetStringUTF16(IDS_APP_DEFAULT_PAGE_NAME)));
 401     dictionary->Set("appPageNames",
 402                     static_cast<base::ListValue*>(list->DeepCopy()));
 403   } else {
 404     dictionary->Set("appPageNames",
 405                     static_cast<base::ListValue*>(app_page_names->DeepCopy()));
 406   }
 407 }
 408
 409 base::DictionaryValue* AppLauncherHandler::GetAppInfo(
 410     const Extension* extension) {
 411   base::DictionaryValue* app_info = new base::DictionaryValue();
 412   // CreateAppInfo can change the extension prefs.
 413   base::AutoReset<bool> auto_reset(&ignore_changes_, true);
 414   CreateAppInfo(extension,
 415                 extension_service_,
 416                 app_info);
 417   return app_info;
 418 }
 419
 420 void AppLauncherHandler::HandleGetApps(const base::ListValue* args) {
 421   base::DictionaryValue dictionary;
 422
 423   // Tell the client whether to show the promo for this view. We don't do this
 424   // in the case of PREF_CHANGED because:
 425   //
 426   // a) At that point in time, depending on the pref that changed, it can look
 427   //    like the set of apps installed has changed, and we will mark the promo
 428   //    expired.
 429   // b) Conceptually, it doesn't really make sense to count a
 430   //    prefchange-triggered refresh as a promo 'view'.
 431   Profile* profile = Profile::FromWebUI(web_ui());
 432
 433   // The first time we load the apps we must add all current app to the list
 434   // of apps visible on the NTP.
 435   if (!has_loaded_apps_) {
 436     ExtensionRegistry* registry = ExtensionRegistry::Get(profile);
 437     const ExtensionSet& enabled_set = registry->enabled_extensions();
 438     for (extensions::ExtensionSet::const_iterator it = enabled_set.begin();
 439          it != enabled_set.end(); ++it) {
 440       visible_apps_.insert((*it)->id());
 441     }
 442
 443     const ExtensionSet& disabled_set = registry->disabled_extensions();
 444     for (ExtensionSet::const_iterator it = disabled_set.begin();
 445          it != disabled_set.end(); ++it) {
 446       visible_apps_.insert((*it)->id());
 447     }
 448
 449     const ExtensionSet& terminated_set = registry->terminated_extensions();
 450     for (ExtensionSet::const_iterator it = terminated_set.begin();
 451          it != terminated_set.end(); ++it) {
 452       visible_apps_.insert((*it)->id());
 453     }
 454   }
 455
 456   SetAppToBeHighlighted();
 457   FillAppDictionary(&dictionary);
 458   web_ui()->CallJavascriptFunction("ntp.getAppsCallback", dictionary);
 459
 460   // First time we get here we set up the observer so that we can tell update
 461   // the apps as they change.
 462   if (!has_loaded_apps_) {
 463     base::Closure callback = base::Bind(
 464         &AppLauncherHandler::OnExtensionPreferenceChanged,
 465         base::Unretained(this));
 466     extension_pref_change_registrar_.Init(
 467         extension_service_->extension_prefs()->pref_service());
 468     extension_pref_change_registrar_.Add(
 469         extensions::pref_names::kExtensions, callback);
 470     extension_pref_change_registrar_.Add(prefs::kNtpAppPageNames, callback);
 471
 472     registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_LOADED,
 473         content::Source<Profile>(profile));
 474     registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_UNLOADED,
 475         content::Source<Profile>(profile));
 476     registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_UNINSTALLED,
 477         content::Source<Profile>(profile));
 478     registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_LAUNCHER_REORDERED,
 479         content::Source<AppSorting>(
 480             extension_service_->extension_prefs()->app_sorting()));
 481     registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_INSTALL_ERROR,
 482         content::Source<CrxInstaller>(NULL));
 483     registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_LOAD_ERROR,
 484         content::Source<Profile>(profile));
 485   }
 486
 487   has_loaded_apps_ = true;
 488 }
 489
 490 void AppLauncherHandler::HandleLaunchApp(const base::ListValue* args) {
 491   std::string extension_id;
 492   CHECK(args->GetString(0, &extension_id));
 493   double source = -1.0;
 494   CHECK(args->GetDouble(1, &source));
 495   std::string url;
 496   if (args->GetSize() > 2)
 497     CHECK(args->GetString(2, &url));
 498
 499   extension_misc::AppLaunchBucket launch_bucket =
 500       static_cast<extension_misc::AppLaunchBucket>(
 501           static_cast<int>(source));
 502   CHECK(launch_bucket >= 0 &&
 503         launch_bucket < extension_misc::APP_LAUNCH_BUCKET_BOUNDARY);
 504
 505   const Extension* extension =
 506       extension_service_->GetExtensionById(extension_id, false);
 507
 508   // Prompt the user to re-enable the application if disabled.
 509   if (!extension) {
 510     PromptToEnableApp(extension_id);
 511     return;
 512   }
 513
 514   Profile* profile = extension_service_->profile();
 515
 516   WindowOpenDisposition disposition = args->GetSize() > 3 ?
 517         webui::GetDispositionFromClick(args, 3) : CURRENT_TAB;
 518   if (extension_id != extension_misc::kWebStoreAppId) {
 519     CHECK_NE(launch_bucket, extension_misc::APP_LAUNCH_BUCKET_INVALID);
 520     CoreAppLauncherHandler::RecordAppLaunchType(launch_bucket,
 521                                                 extension->GetType());
 522   } else {
 523     CoreAppLauncherHandler::RecordWebStoreLaunch();
 524   }
 525
 526   if (disposition == NEW_FOREGROUND_TAB || disposition == NEW_BACKGROUND_TAB ||
 527       disposition == NEW_WINDOW) {
 528     // TODO(jamescook): Proper support for background tabs.
 529     AppLaunchParams params(profile, extension,
 530                            disposition == NEW_WINDOW ?
 531                                extensions::LAUNCH_CONTAINER_WINDOW :
 532                                extensions::LAUNCH_CONTAINER_TAB,
 533                            disposition);
 534     params.override_url = GURL(url);
 535     OpenApplication(params);
 536   } else {
 537     // To give a more "launchy" experience when using the NTP launcher, we close
 538     // it automatically.
 539     Browser* browser = chrome::FindBrowserWithWebContents(
 540         web_ui()->GetWebContents());
 541     WebContents* old_contents = NULL;
 542     if (browser)
 543       old_contents = browser->tab_strip_model()->GetActiveWebContents();
 544
 545     AppLaunchParams params(profile, extension,
 546                            old_contents ? CURRENT_TAB : NEW_FOREGROUND_TAB);
 547     params.override_url = GURL(url);
 548     WebContents* new_contents = OpenApplication(params);
 549
 550     // This will also destroy the handler, so do not perform any actions after.
 551     if (new_contents != old_contents && browser &&
 552         browser->tab_strip_model()->count() > 1) {
 553       chrome::CloseWebContents(browser, old_contents, true);
 554     }
 555   }
 556 }
 557
 558 void AppLauncherHandler::HandleSetLaunchType(const base::ListValue* args) {
 559   std::string extension_id;
 560   double launch_type;
 561   CHECK(args->GetString(0, &extension_id));
 562   CHECK(args->GetDouble(1, &launch_type));
 563
 564   const Extension* extension =
 565       extension_service_->GetExtensionById(extension_id, true);
 566   if (!extension)
 567     return;
 568
 569   // Don't update the page; it already knows about the launch type change.
 570   base::AutoReset<bool> auto_reset(&ignore_changes_, true);
 571
 572   extensions::SetLaunchType(
 573       extension_service_,
 574       extension_id,
 575       static_cast<extensions::LaunchType>(static_cast<int>(launch_type)));
 576 }
 577
 578 void AppLauncherHandler::HandleUninstallApp(const base::ListValue* args) {
 579   std::string extension_id;
 580   CHECK(args->GetString(0, &extension_id));
 581
 582   const Extension* extension = extension_service_->GetInstalledExtension(
 583       extension_id);
 584   if (!extension)
 585     return;
 586
 587   if (!extensions::ExtensionSystem::Get(extension_service_->profile())->
 588           management_policy()->UserMayModifySettings(extension, NULL)) {
 589     LOG(ERROR) << "Attempt to uninstall an extension that is non-usermanagable "
 590                << "was made. Extension id : " << extension->id();
 591     return;
 592   }
 593   if (!extension_id_prompting_.empty())
 594     return;  // Only one prompt at a time.
 595
 596   extension_id_prompting_ = extension_id;
 597
 598   bool dont_confirm = false;
 599   if (args->GetBoolean(1, &dont_confirm) && dont_confirm) {
 600     base::AutoReset<bool> auto_reset(&ignore_changes_, true);
 601     ExtensionUninstallAccepted();
 602   } else {
 603     GetExtensionUninstallDialog()->ConfirmUninstall(extension);
 604   }
 605 }
 606
 607 void AppLauncherHandler::HandleCreateAppShortcut(const base::ListValue* args) {
 608   std::string extension_id;
 609   CHECK(args->GetString(0, &extension_id));
 610
 611   const Extension* extension =
 612       extension_service_->GetExtensionById(extension_id, true);
 613   if (!extension)
 614     return;
 615
 616   Browser* browser = chrome::FindBrowserWithWebContents(
 617         web_ui()->GetWebContents());
 618   chrome::ShowCreateChromeAppShortcutsDialog(
 619       browser->window()->GetNativeWindow(), browser->profile(), extension,
 620       base::Closure());
 621 }
 622
 623 void AppLauncherHandler::HandleReorderApps(const base::ListValue* args) {
 624   CHECK(args->GetSize() == 2);
 625
 626   std::string dragged_app_id;
 627   const base::ListValue* app_order;
 628   CHECK(args->GetString(0, &dragged_app_id));
 629   CHECK(args->GetList(1, &app_order));
 630
 631   std::string predecessor_to_moved_ext;
 632   std::string successor_to_moved_ext;
 633   for (size_t i = 0; i < app_order->GetSize(); ++i) {
 634     std::string value;
 635     if (app_order->GetString(i, &value) && value == dragged_app_id) {
 636       if (i > 0)
 637         CHECK(app_order->GetString(i - 1, &predecessor_to_moved_ext));
 638       if (i + 1 < app_order->GetSize())
 639         CHECK(app_order->GetString(i + 1, &successor_to_moved_ext));
 640       break;
 641     }
 642   }
 643
 644   // Don't update the page; it already knows the apps have been reordered.
 645   base::AutoReset<bool> auto_reset(&ignore_changes_, true);
 646   extension_service_->extension_prefs()->SetAppDraggedByUser(dragged_app_id);
 647   extension_service_->OnExtensionMoved(dragged_app_id,
 648                                        predecessor_to_moved_ext,
 649                                        successor_to_moved_ext);
 650 }
 651
 652 void AppLauncherHandler::HandleSetPageIndex(const base::ListValue* args) {
 653   AppSorting* app_sorting =
 654       extension_service_->extension_prefs()->app_sorting();
 655
 656   std::string extension_id;
 657   double page_index;
 658   CHECK(args->GetString(0, &extension_id));
 659   CHECK(args->GetDouble(1, &page_index));
 660   const syncer::StringOrdinal& page_ordinal =
 661       app_sorting->PageIntegerAsStringOrdinal(static_cast<size_t>(page_index));
 662
 663   // Don't update the page; it already knows the apps have been reordered.
 664   base::AutoReset<bool> auto_reset(&ignore_changes_, true);
 665   app_sorting->SetPageOrdinal(extension_id, page_ordinal);
 666 }
 667
 668 void AppLauncherHandler::HandleSaveAppPageName(const base::ListValue* args) {
 669   base::string16 name;
 670   CHECK(args->GetString(0, &name));
 671
 672   double page_index;
 673   CHECK(args->GetDouble(1, &page_index));
 674
 675   base::AutoReset<bool> auto_reset(&ignore_changes_, true);
 676   PrefService* prefs = Profile::FromWebUI(web_ui())->GetPrefs();
 677   ListPrefUpdate update(prefs, prefs::kNtpAppPageNames);
 678   base::ListValue* list = update.Get();
 679   list->Set(static_cast<size_t>(page_index), new base::StringValue(name));
 680 }
 681
 682 void AppLauncherHandler::HandleGenerateAppForLink(const base::ListValue* args) {
 683   std::string url;
 684   CHECK(args->GetString(0, &url));
 685   GURL launch_url(url);
 686
 687   base::string16 title;
 688   CHECK(args->GetString(1, &title));
 689
 690   double page_index;
 691   CHECK(args->GetDouble(2, &page_index));
 692   AppSorting* app_sorting =
 693       extension_service_->extension_prefs()->app_sorting();
 694   const syncer::StringOrdinal& page_ordinal =
 695       app_sorting->PageIntegerAsStringOrdinal(static_cast<size_t>(page_index));
 696
 697   Profile* profile = Profile::FromWebUI(web_ui());
 698   FaviconService* favicon_service =
 699       FaviconServiceFactory::GetForProfile(profile, Profile::EXPLICIT_ACCESS);
 700   if (!favicon_service) {
 701     LOG(ERROR) << "No favicon service";
 702     return;
 703   }
 704
 705   scoped_ptr<AppInstallInfo> install_info(new AppInstallInfo());
 706   install_info->title = title;
 707   install_info->app_url = launch_url;
 708   install_info->page_ordinal = page_ordinal;
 709
 710   favicon_service->GetFaviconImageForURL(
 711       FaviconService::FaviconForURLParams(launch_url,
 712                                           chrome::FAVICON,
 713                                           gfx::kFaviconSize),
 714       base::Bind(&AppLauncherHandler::OnFaviconForApp,
 715                  base::Unretained(this),
 716                  base::Passed(&install_info)),
 717       &cancelable_task_tracker_);
 718 }
 719
 720 void AppLauncherHandler::StopShowingAppLauncherPromo(
 721     const base::ListValue* args) {
 722 #if defined(ENABLE_APP_LIST)
 723   g_browser_process->local_state()->SetBoolean(
 724       prefs::kShowAppLauncherPromo, false);
 725   RecordAppLauncherPromoHistogram(apps::APP_LAUNCHER_PROMO_DISMISSED);
 726 #endif
 727 }
 728
 729 void AppLauncherHandler::OnLearnMore(const base::ListValue* args) {
 730   RecordAppLauncherPromoHistogram(apps::APP_LAUNCHER_PROMO_LEARN_MORE);
 731 }
 732
 733 void AppLauncherHandler::OnFaviconForApp(
 734     scoped_ptr<AppInstallInfo> install_info,
 735     const chrome::FaviconImageResult& image_result) {
 736   scoped_ptr<WebApplicationInfo> web_app(new WebApplicationInfo());
 737   web_app->title = install_info->title;
 738   web_app->app_url = install_info->app_url;
 739
 740   if (!image_result.image.IsEmpty()) {
 741     WebApplicationInfo::IconInfo icon;
 742     icon.data = image_result.image.AsBitmap();
 743     icon.width = icon.data.width();
 744     icon.height = icon.data.height();
 745     web_app->icons.push_back(icon);
 746   }
 747
 748   scoped_refptr<CrxInstaller> installer(
 749       CrxInstaller::CreateSilent(extension_service_));
 750   installer->set_error_on_unsupported_requirements(true);
 751   installer->set_page_ordinal(install_info->page_ordinal);
 752   installer->InstallWebApp(*web_app);
 753   attempted_bookmark_app_install_ = true;
 754 }
 755
 756 void AppLauncherHandler::SetAppToBeHighlighted() {
 757   if (highlight_app_id_.empty())
 758     return;
 759
 760   base::StringValue app_id(highlight_app_id_);
 761   web_ui()->CallJavascriptFunction("ntp.setAppToBeHighlighted", app_id);
 762   highlight_app_id_.clear();
 763 }
 764
 765 void AppLauncherHandler::OnExtensionPreferenceChanged() {
 766   base::DictionaryValue dictionary;
 767   FillAppDictionary(&dictionary);
 768   web_ui()->CallJavascriptFunction("ntp.appsPrefChangeCallback", dictionary);
 769 }
 770
 771 void AppLauncherHandler::OnLocalStatePreferenceChanged() {
 772 #if defined(ENABLE_APP_LIST)
 773   web_ui()->CallJavascriptFunction(
 774       "ntp.appLauncherPromoPrefChangeCallback",
 775       base::FundamentalValue(g_browser_process->local_state()->GetBoolean(
 776           prefs::kShowAppLauncherPromo)));
 777 #endif
 778 }
 779
 780 void AppLauncherHandler::CleanupAfterUninstall() {
 781   extension_id_prompting_.clear();
 782 }
 783
 784 void AppLauncherHandler::PromptToEnableApp(const std::string& extension_id) {
 785   if (!extension_id_prompting_.empty())
 786     return;  // Only one prompt at a time.
 787
 788   extension_id_prompting_ = extension_id;
 789   extension_enable_flow_.reset(new ExtensionEnableFlow(
 790       Profile::FromWebUI(web_ui()), extension_id, this));
 791   extension_enable_flow_->StartForWebContents(web_ui()->GetWebContents());
 792 }
 793
 794 void AppLauncherHandler::ExtensionUninstallAccepted() {
 795   // Do the uninstall work here.
 796   DCHECK(!extension_id_prompting_.empty());
 797
 798   // The extension can be uninstalled in another window while the UI was
 799   // showing. Do nothing in that case.
 800   const Extension* extension =
 801       extension_service_->GetInstalledExtension(extension_id_prompting_);
 802   if (!extension)
 803     return;
 804
 805   extension_service_->UninstallExtension(extension_id_prompting_,
 806                                          false /* external_uninstall */, NULL);
 807   CleanupAfterUninstall();
 808 }
 809
 810 void AppLauncherHandler::ExtensionUninstallCanceled() {
 811   CleanupAfterUninstall();
 812 }
 813
 814 void AppLauncherHandler::ExtensionEnableFlowFinished() {
 815   DCHECK_EQ(extension_id_prompting_, extension_enable_flow_->extension_id());
 816
 817   // We bounce this off the NTP so the browser can update the apps icon.
 818   // If we don't launch the app asynchronously, then the app's disabled
 819   // icon disappears but isn't replaced by the enabled icon, making a poor
 820   // visual experience.
 821   base::StringValue app_id(extension_id_prompting_);
 822   web_ui()->CallJavascriptFunction("ntp.launchAppAfterEnable", app_id);
 823
 824   extension_enable_flow_.reset();
 825   extension_id_prompting_ = "";
 826 }
 827
 828 void AppLauncherHandler::ExtensionEnableFlowAborted(bool user_initiated) {
 829   DCHECK_EQ(extension_id_prompting_, extension_enable_flow_->extension_id());
 830
 831   // We record the histograms here because ExtensionUninstallCanceled is also
 832   // called when the extension uninstall dialog is canceled.
 833   const Extension* extension =
 834       extension_service_->GetExtensionById(extension_id_prompting_, true);
 835   std::string histogram_name = user_initiated ?
 836       "Extensions.Permissions_ReEnableCancel" :
 837       "Extensions.Permissions_ReEnableAbort";
 838   ExtensionService::RecordPermissionMessagesHistogram(
 839       extension, histogram_name.c_str());
 840
 841   extension_enable_flow_.reset();
 842   CleanupAfterUninstall();
 843 }
 844
 845 ExtensionUninstallDialog* AppLauncherHandler::GetExtensionUninstallDialog() {
 846   if (!extension_uninstall_dialog_.get()) {
 847     Browser* browser = chrome::FindBrowserWithWebContents(
 848         web_ui()->GetWebContents());
 849     extension_uninstall_dialog_.reset(
 850         ExtensionUninstallDialog::Create(extension_service_->profile(),
 851                                          browser, this));
 852   }
 853   return extension_uninstall_dialog_.get();
 854 }