src/chrome/browser/ui/views/tabs/browser_tab_strip_controller.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/views/tabs/browser_tab_strip_controller.h"
   6
   7 #include "base/auto_reset.h"
   8 #include "base/command_line.h"
   9 #include "base/prefs/pref_service.h"
  10 #include "base/task_runner_util.h"
  11 #include "base/threading/sequenced_worker_pool.h"
  12 #include "chrome/browser/autocomplete/autocomplete_classifier.h"
  13 #include "chrome/browser/autocomplete/autocomplete_classifier_factory.h"
  14 #include "chrome/browser/autocomplete/autocomplete_input.h"
  15 #include "chrome/browser/autocomplete/autocomplete_match.h"
  16 #include "chrome/browser/browser_process.h"
  17 #include "chrome/browser/chrome_notification_types.h"
  18 #include "chrome/browser/extensions/tab_helper.h"
  19 #include "chrome/browser/favicon/favicon_tab_helper.h"
  20 #include "chrome/browser/profiles/profile.h"
  21 #include "chrome/browser/search/search.h"
  22 #include "chrome/browser/ui/browser.h"
  23 #include "chrome/browser/ui/browser_tabstrip.h"
  24 #include "chrome/browser/ui/tabs/tab_menu_model.h"
  25 #include "chrome/browser/ui/tabs/tab_strip_model.h"
  26 #include "chrome/browser/ui/tabs/tab_strip_model_delegate.h"
  27 #include "chrome/browser/ui/tabs/tab_utils.h"
  28 #include "chrome/browser/ui/views/frame/browser_view.h"
  29 #include "chrome/browser/ui/views/tabs/tab.h"
  30 #include "chrome/browser/ui/views/tabs/tab_renderer_data.h"
  31 #include "chrome/browser/ui/views/tabs/tab_strip.h"
  32 #include "chrome/common/chrome_switches.h"
  33 #include "chrome/common/pref_names.h"
  34 #include "chrome/common/url_constants.h"
  35 #include "content/public/browser/browser_thread.h"
  36 #include "content/public/browser/notification_service.h"
  37 #include "content/public/browser/plugin_service.h"
  38 #include "content/public/browser/user_metrics.h"
  39 #include "content/public/browser/web_contents.h"
  40 #include "content/public/common/webplugininfo.h"
  41 #include "ipc/ipc_message.h"
  42 #include "net/base/net_util.h"
  43 #include "ui/base/layout.h"
  44 #include "ui/base/models/list_selection_model.h"
  45 #include "ui/gfx/image/image.h"
  46 #include "ui/views/controls/menu/menu_item_view.h"
  47 #include "ui/views/controls/menu/menu_runner.h"
  48 #include "ui/views/widget/widget.h"
  49
  50 using base::UserMetricsAction;
  51 using content::WebContents;
  52
  53 namespace {
  54
  55 TabRendererData::NetworkState TabContentsNetworkState(
  56     WebContents* contents) {
  57   if (!contents || !contents->IsLoading())
  58     return TabRendererData::NETWORK_STATE_NONE;
  59   if (contents->IsWaitingForResponse())
  60     return TabRendererData::NETWORK_STATE_WAITING;
  61   return TabRendererData::NETWORK_STATE_LOADING;
  62 }
  63
  64 TabStripLayoutType DetermineTabStripLayout(
  65     PrefService* prefs,
  66     chrome::HostDesktopType host_desktop_type,
  67     bool* adjust_layout) {
  68   *adjust_layout = false;
  69   if (CommandLine::ForCurrentProcess()->HasSwitch(
  70           switches::kEnableStackedTabStrip)) {
  71     return TAB_STRIP_LAYOUT_STACKED;
  72   }
  73   // For chromeos always allow entering stacked mode.
  74 #if defined(USE_AURA)
  75   if (host_desktop_type != chrome::HOST_DESKTOP_TYPE_ASH)
  76     return TAB_STRIP_LAYOUT_SHRINK;
  77 #else
  78   if (ui::GetDisplayLayout() != ui::LAYOUT_TOUCH)
  79     return TAB_STRIP_LAYOUT_SHRINK;
  80 #endif
  81   *adjust_layout = true;
  82   switch (prefs->GetInteger(prefs::kTabStripLayoutType)) {
  83     case TAB_STRIP_LAYOUT_STACKED:
  84       return TAB_STRIP_LAYOUT_STACKED;
  85     default:
  86       return TAB_STRIP_LAYOUT_SHRINK;
  87   }
  88 }
  89
  90 // Get the MIME type of the file pointed to by the url, based on the file's
  91 // extension. Must be called on a thread that allows IO.
  92 std::string FindURLMimeType(const GURL& url) {
  93   DCHECK(!content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
  94   base::FilePath full_path;
  95   net::FileURLToFilePath(url, &full_path);
  96
  97   // Get the MIME type based on the filename.
  98   std::string mime_type;
  99   net::GetMimeTypeFromFile(full_path, &mime_type);
 100
 101   return mime_type;
 102 }
 103
 104 }  // namespace
 105
 106 class BrowserTabStripController::TabContextMenuContents
 107     : public ui::SimpleMenuModel::Delegate {
 108  public:
 109   TabContextMenuContents(Tab* tab,
 110                          BrowserTabStripController* controller)
 111       : tab_(tab),
 112         controller_(controller),
 113         last_command_(TabStripModel::CommandFirst) {
 114     model_.reset(new TabMenuModel(
 115         this, controller->model_,
 116         controller->tabstrip_->GetModelIndexOfTab(tab)));
 117     menu_runner_.reset(new views::MenuRunner(model_.get()));
 118   }
 119
 120   virtual ~TabContextMenuContents() {
 121     if (controller_)
 122       controller_->tabstrip_->StopAllHighlighting();
 123   }
 124
 125   void Cancel() {
 126     controller_ = NULL;
 127   }
 128
 129   void RunMenuAt(const gfx::Point& point, ui::MenuSourceType source_type) {
 130     if (menu_runner_->RunMenuAt(
 131             tab_->GetWidget(), NULL, gfx::Rect(point, gfx::Size()),
 132             views::MenuItemView::TOPLEFT, source_type,
 133             views::MenuRunner::HAS_MNEMONICS |
 134             views::MenuRunner::CONTEXT_MENU) ==
 135         views::MenuRunner::MENU_DELETED)
 136       return;
 137   }
 138
 139   // Overridden from ui::SimpleMenuModel::Delegate:
 140   virtual bool IsCommandIdChecked(int command_id) const OVERRIDE {
 141     return false;
 142   }
 143   virtual bool IsCommandIdEnabled(int command_id) const OVERRIDE {
 144     return controller_->IsCommandEnabledForTab(
 145         static_cast<TabStripModel::ContextMenuCommand>(command_id),
 146         tab_);
 147   }
 148   virtual bool GetAcceleratorForCommandId(
 149       int command_id,
 150       ui::Accelerator* accelerator) OVERRIDE {
 151     int browser_cmd;
 152     return TabStripModel::ContextMenuCommandToBrowserCommand(command_id,
 153                                                              &browser_cmd) ?
 154         controller_->tabstrip_->GetWidget()->GetAccelerator(browser_cmd,
 155                                                             accelerator) :
 156         false;
 157   }
 158   virtual void CommandIdHighlighted(int command_id) OVERRIDE {
 159     controller_->StopHighlightTabsForCommand(last_command_, tab_);
 160     last_command_ = static_cast<TabStripModel::ContextMenuCommand>(command_id);
 161     controller_->StartHighlightTabsForCommand(last_command_, tab_);
 162   }
 163   virtual void ExecuteCommand(int command_id, int event_flags) OVERRIDE {
 164     // Executing the command destroys |this|, and can also end up destroying
 165     // |controller_|. So stop the highlights before executing the command.
 166     controller_->tabstrip_->StopAllHighlighting();
 167     controller_->ExecuteCommandForTab(
 168         static_cast<TabStripModel::ContextMenuCommand>(command_id),
 169         tab_);
 170   }
 171
 172   virtual void MenuClosed(ui::SimpleMenuModel* /*source*/) OVERRIDE {
 173     if (controller_)
 174       controller_->tabstrip_->StopAllHighlighting();
 175   }
 176
 177  private:
 178   scoped_ptr<TabMenuModel> model_;
 179   scoped_ptr<views::MenuRunner> menu_runner_;
 180
 181   // The tab we're showing a menu for.
 182   Tab* tab_;
 183
 184   // A pointer back to our hosting controller, for command state information.
 185   BrowserTabStripController* controller_;
 186
 187   // The last command that was selected, so that we can start/stop highlighting
 188   // appropriately as the user moves through the menu.
 189   TabStripModel::ContextMenuCommand last_command_;
 190
 191   DISALLOW_COPY_AND_ASSIGN(TabContextMenuContents);
 192 };
 193
 194 ////////////////////////////////////////////////////////////////////////////////
 195 // BrowserTabStripController, public:
 196
 197 BrowserTabStripController::BrowserTabStripController(Browser* browser,
 198                                                      TabStripModel* model)
 199     : model_(model),
 200       tabstrip_(NULL),
 201       browser_(browser),
 202       hover_tab_selector_(model),
 203       weak_ptr_factory_(this) {
 204   model_->AddObserver(this);
 205
 206   local_pref_registrar_.Init(g_browser_process->local_state());
 207   local_pref_registrar_.Add(
 208       prefs::kTabStripLayoutType,
 209       base::Bind(&BrowserTabStripController::UpdateLayoutType,
 210                  base::Unretained(this)));
 211 }
 212
 213 BrowserTabStripController::~BrowserTabStripController() {
 214   // When we get here the TabStrip is being deleted. We need to explicitly
 215   // cancel the menu, otherwise it may try to invoke something on the tabstrip
 216   // from its destructor.
 217   if (context_menu_contents_.get())
 218     context_menu_contents_->Cancel();
 219
 220   model_->RemoveObserver(this);
 221 }
 222
 223 void BrowserTabStripController::InitFromModel(TabStrip* tabstrip) {
 224   tabstrip_ = tabstrip;
 225
 226   UpdateLayoutType();
 227
 228   // Walk the model, calling our insertion observer method for each item within
 229   // it.
 230   for (int i = 0; i < model_->count(); ++i)
 231     AddTab(model_->GetWebContentsAt(i), i, model_->active_index() == i);
 232 }
 233
 234 bool BrowserTabStripController::IsCommandEnabledForTab(
 235     TabStripModel::ContextMenuCommand command_id,
 236     Tab* tab) const {
 237   int model_index = tabstrip_->GetModelIndexOfTab(tab);
 238   return model_->ContainsIndex(model_index) ?
 239       model_->IsContextMenuCommandEnabled(model_index, command_id) : false;
 240 }
 241
 242 void BrowserTabStripController::ExecuteCommandForTab(
 243     TabStripModel::ContextMenuCommand command_id,
 244     Tab* tab) {
 245   int model_index = tabstrip_->GetModelIndexOfTab(tab);
 246   if (model_->ContainsIndex(model_index))
 247     model_->ExecuteContextMenuCommand(model_index, command_id);
 248 }
 249
 250 bool BrowserTabStripController::IsTabPinned(Tab* tab) const {
 251   return IsTabPinned(tabstrip_->GetModelIndexOfTab(tab));
 252 }
 253
 254 const ui::ListSelectionModel& BrowserTabStripController::GetSelectionModel() {
 255   return model_->selection_model();
 256 }
 257
 258 int BrowserTabStripController::GetCount() const {
 259   return model_->count();
 260 }
 261
 262 bool BrowserTabStripController::IsValidIndex(int index) const {
 263   return model_->ContainsIndex(index);
 264 }
 265
 266 bool BrowserTabStripController::IsActiveTab(int model_index) const {
 267   return model_->active_index() == model_index;
 268 }
 269
 270 int BrowserTabStripController::GetActiveIndex() const {
 271   return model_->active_index();
 272 }
 273
 274 bool BrowserTabStripController::IsTabSelected(int model_index) const {
 275   return model_->IsTabSelected(model_index);
 276 }
 277
 278 bool BrowserTabStripController::IsTabPinned(int model_index) const {
 279   return model_->ContainsIndex(model_index) && model_->IsTabPinned(model_index);
 280 }
 281
 282 bool BrowserTabStripController::IsNewTabPage(int model_index) const {
 283   if (!model_->ContainsIndex(model_index))
 284     return false;
 285
 286   const WebContents* contents = model_->GetWebContentsAt(model_index);
 287   return contents && (contents->GetURL() == GURL(chrome::kChromeUINewTabURL) ||
 288       chrome::IsInstantNTP(contents));
 289 }
 290
 291 void BrowserTabStripController::SelectTab(int model_index) {
 292   model_->ActivateTabAt(model_index, true);
 293 }
 294
 295 void BrowserTabStripController::ExtendSelectionTo(int model_index) {
 296   model_->ExtendSelectionTo(model_index);
 297 }
 298
 299 void BrowserTabStripController::ToggleSelected(int model_index) {
 300   model_->ToggleSelectionAt(model_index);
 301 }
 302
 303 void BrowserTabStripController::AddSelectionFromAnchorTo(int model_index) {
 304   model_->AddSelectionFromAnchorTo(model_index);
 305 }
 306
 307 void BrowserTabStripController::CloseTab(int model_index,
 308                                          CloseTabSource source) {
 309   // Cancel any pending tab transition.
 310   hover_tab_selector_.CancelTabTransition();
 311
 312   tabstrip_->PrepareForCloseAt(model_index, source);
 313   model_->CloseWebContentsAt(model_index,
 314                              TabStripModel::CLOSE_USER_GESTURE |
 315                              TabStripModel::CLOSE_CREATE_HISTORICAL_TAB);
 316 }
 317
 318 void BrowserTabStripController::ShowContextMenuForTab(
 319     Tab* tab,
 320     const gfx::Point& p,
 321     ui::MenuSourceType source_type) {
 322   context_menu_contents_.reset(new TabContextMenuContents(tab, this));
 323   context_menu_contents_->RunMenuAt(p, source_type);
 324 }
 325
 326 void BrowserTabStripController::UpdateLoadingAnimations() {
 327   // Don't use the model count here as it's possible for this to be invoked
 328   // before we've applied an update from the model (Browser::TabInsertedAt may
 329   // be processed before us and invokes this).
 330   for (int i = 0, tab_count = tabstrip_->tab_count(); i < tab_count; ++i) {
 331     if (model_->ContainsIndex(i)) {
 332       Tab* tab = tabstrip_->tab_at(i);
 333       WebContents* contents = model_->GetWebContentsAt(i);
 334       tab->UpdateLoadingAnimation(TabContentsNetworkState(contents));
 335     }
 336   }
 337 }
 338
 339 int BrowserTabStripController::HasAvailableDragActions() const {
 340   return model_->delegate()->GetDragActions();
 341 }
 342
 343 void BrowserTabStripController::OnDropIndexUpdate(int index,
 344                                                   bool drop_before) {
 345   // Perform a delayed tab transition if hovering directly over a tab.
 346   // Otherwise, cancel the pending one.
 347   if (index != -1 && !drop_before) {
 348     hover_tab_selector_.StartTabTransition(index);
 349   } else {
 350     hover_tab_selector_.CancelTabTransition();
 351   }
 352 }
 353
 354 void BrowserTabStripController::PerformDrop(bool drop_before,
 355                                             int index,
 356                                             const GURL& url) {
 357   chrome::NavigateParams params(browser_, url, content::PAGE_TRANSITION_LINK);
 358   params.tabstrip_index = index;
 359
 360   if (drop_before) {
 361     content::RecordAction(UserMetricsAction("Tab_DropURLBetweenTabs"));
 362     params.disposition = NEW_FOREGROUND_TAB;
 363   } else {
 364     content::RecordAction(UserMetricsAction("Tab_DropURLOnTab"));
 365     params.disposition = CURRENT_TAB;
 366     params.source_contents = model_->GetWebContentsAt(index);
 367   }
 368   params.window_action = chrome::NavigateParams::SHOW_WINDOW;
 369   chrome::Navigate(&params);
 370 }
 371
 372 bool BrowserTabStripController::IsCompatibleWith(TabStrip* other) const {
 373   Profile* other_profile =
 374       static_cast<BrowserTabStripController*>(other->controller())->profile();
 375   return other_profile == profile();
 376 }
 377
 378 void BrowserTabStripController::CreateNewTab() {
 379   model_->delegate()->AddTabAt(GURL(), -1, true);
 380 }
 381
 382 void BrowserTabStripController::CreateNewTabWithLocation(
 383     const base::string16& location) {
 384   // Use autocomplete to clean up the text, going so far as to turn it into
 385   // a search query if necessary.
 386   AutocompleteMatch match;
 387   AutocompleteClassifierFactory::GetForProfile(profile())->Classify(
 388       location, false, false, AutocompleteInput::BLANK, &match, NULL);
 389   if (match.destination_url.is_valid())
 390     model_->delegate()->AddTabAt(match.destination_url, -1, true);
 391 }
 392
 393 bool BrowserTabStripController::IsIncognito() {
 394   return browser_->profile()->IsOffTheRecord();
 395 }
 396
 397 void BrowserTabStripController::LayoutTypeMaybeChanged() {
 398   bool adjust_layout = false;
 399   TabStripLayoutType layout_type =
 400       DetermineTabStripLayout(g_browser_process->local_state(),
 401                               browser_->host_desktop_type(), &adjust_layout);
 402   if (!adjust_layout || layout_type == tabstrip_->layout_type())
 403     return;
 404
 405   g_browser_process->local_state()->SetInteger(
 406       prefs::kTabStripLayoutType,
 407       static_cast<int>(tabstrip_->layout_type()));
 408 }
 409
 410 void BrowserTabStripController::OnStartedDraggingTabs() {
 411   BrowserView* browser_view = BrowserView::GetBrowserViewForBrowser(browser_);
 412   if (browser_view && !immersive_reveal_lock_.get()) {
 413     // The top-of-window views should be revealed while the user is dragging
 414     // tabs in immersive fullscreen. The top-of-window views may not be already
 415     // revealed if the user is attempting to attach a tab to a tabstrip
 416     // belonging to an immersive fullscreen window.
 417     immersive_reveal_lock_.reset(
 418         browser_view->immersive_mode_controller()->GetRevealedLock(
 419             ImmersiveModeController::ANIMATE_REVEAL_NO));
 420   }
 421 }
 422
 423 void BrowserTabStripController::OnStoppedDraggingTabs() {
 424   immersive_reveal_lock_.reset();
 425 }
 426
 427 void BrowserTabStripController::CheckFileSupported(const GURL& url) {
 428   base::PostTaskAndReplyWithResult(
 429       content::BrowserThread::GetBlockingPool(),
 430       FROM_HERE,
 431       base::Bind(&FindURLMimeType, url),
 432       base::Bind(&BrowserTabStripController::OnFindURLMimeTypeCompleted,
 433                  weak_ptr_factory_.GetWeakPtr(),
 434                  url));
 435 }
 436
 437 ////////////////////////////////////////////////////////////////////////////////
 438 // BrowserTabStripController, TabStripModelObserver implementation:
 439
 440 void BrowserTabStripController::TabInsertedAt(WebContents* contents,
 441                                               int model_index,
 442                                               bool is_active) {
 443   DCHECK(contents);
 444   DCHECK(model_->ContainsIndex(model_index));
 445   AddTab(contents, model_index, is_active);
 446 }
 447
 448 void BrowserTabStripController::TabDetachedAt(WebContents* contents,
 449                                               int model_index) {
 450   // Cancel any pending tab transition.
 451   hover_tab_selector_.CancelTabTransition();
 452
 453   tabstrip_->RemoveTabAt(model_index);
 454 }
 455
 456 void BrowserTabStripController::TabSelectionChanged(
 457     TabStripModel* tab_strip_model,
 458     const ui::ListSelectionModel& old_model) {
 459   tabstrip_->SetSelection(old_model, model_->selection_model());
 460 }
 461
 462 void BrowserTabStripController::TabMoved(WebContents* contents,
 463                                          int from_model_index,
 464                                          int to_model_index) {
 465   // Cancel any pending tab transition.
 466   hover_tab_selector_.CancelTabTransition();
 467
 468   // Pass in the TabRendererData as the pinned state may have changed.
 469   TabRendererData data;
 470   SetTabRendererDataFromModel(contents, to_model_index, &data, EXISTING_TAB);
 471   tabstrip_->MoveTab(from_model_index, to_model_index, data);
 472 }
 473
 474 void BrowserTabStripController::TabChangedAt(WebContents* contents,
 475                                              int model_index,
 476                                              TabChangeType change_type) {
 477   if (change_type == TITLE_NOT_LOADING) {
 478     tabstrip_->TabTitleChangedNotLoading(model_index);
 479     // We'll receive another notification of the change asynchronously.
 480     return;
 481   }
 482
 483   SetTabDataAt(contents, model_index);
 484 }
 485
 486 void BrowserTabStripController::TabReplacedAt(TabStripModel* tab_strip_model,
 487                                               WebContents* old_contents,
 488                                               WebContents* new_contents,
 489                                               int model_index) {
 490   SetTabDataAt(new_contents, model_index);
 491 }
 492
 493 void BrowserTabStripController::TabPinnedStateChanged(WebContents* contents,
 494                                                       int model_index) {
 495   // Currently none of the renderers render pinned state differently.
 496 }
 497
 498 void BrowserTabStripController::TabMiniStateChanged(WebContents* contents,
 499                                                     int model_index) {
 500   SetTabDataAt(contents, model_index);
 501 }
 502
 503 void BrowserTabStripController::TabBlockedStateChanged(WebContents* contents,
 504                                                        int model_index) {
 505   SetTabDataAt(contents, model_index);
 506 }
 507
 508 void BrowserTabStripController::SetTabRendererDataFromModel(
 509     WebContents* contents,
 510     int model_index,
 511     TabRendererData* data,
 512     TabStatus tab_status) {
 513   FaviconTabHelper* favicon_tab_helper =
 514       FaviconTabHelper::FromWebContents(contents);
 515
 516   data->favicon = favicon_tab_helper->GetFavicon().AsImageSkia();
 517   data->network_state = TabContentsNetworkState(contents);
 518   data->title = contents->GetTitle();
 519   data->url = contents->GetURL();
 520   data->loading = contents->IsLoading();
 521   data->crashed_status = contents->GetCrashedStatus();
 522   data->incognito = contents->GetBrowserContext()->IsOffTheRecord();
 523   data->show_icon = favicon_tab_helper->ShouldDisplayFavicon();
 524   data->mini = model_->IsMiniTab(model_index);
 525   data->blocked = model_->IsTabBlocked(model_index);
 526   data->app = extensions::TabHelper::FromWebContents(contents)->is_app();
 527   data->media_state = chrome::GetTabMediaStateForContents(contents);
 528 }
 529
 530 void BrowserTabStripController::SetTabDataAt(content::WebContents* web_contents,
 531                                              int model_index) {
 532   TabRendererData data;
 533   SetTabRendererDataFromModel(web_contents, model_index, &data, EXISTING_TAB);
 534   tabstrip_->SetTabData(model_index, data);
 535 }
 536
 537 void BrowserTabStripController::StartHighlightTabsForCommand(
 538     TabStripModel::ContextMenuCommand command_id,
 539     Tab* tab) {
 540   if (command_id == TabStripModel::CommandCloseOtherTabs ||
 541       command_id == TabStripModel::CommandCloseTabsToRight) {
 542     int model_index = tabstrip_->GetModelIndexOfTab(tab);
 543     if (IsValidIndex(model_index)) {
 544       std::vector<int> indices =
 545           model_->GetIndicesClosedByCommand(model_index, command_id);
 546       for (std::vector<int>::const_iterator i(indices.begin());
 547            i != indices.end(); ++i) {
 548         tabstrip_->StartHighlight(*i);
 549       }
 550     }
 551   }
 552 }
 553
 554 void BrowserTabStripController::StopHighlightTabsForCommand(
 555     TabStripModel::ContextMenuCommand command_id,
 556     Tab* tab) {
 557   if (command_id == TabStripModel::CommandCloseTabsToRight ||
 558       command_id == TabStripModel::CommandCloseOtherTabs) {
 559     // Just tell all Tabs to stop pulsing - it's safe.
 560     tabstrip_->StopAllHighlighting();
 561   }
 562 }
 563
 564 void BrowserTabStripController::AddTab(WebContents* contents,
 565                                        int index,
 566                                        bool is_active) {
 567   // Cancel any pending tab transition.
 568   hover_tab_selector_.CancelTabTransition();
 569
 570   TabRendererData data;
 571   SetTabRendererDataFromModel(contents, index, &data, NEW_TAB);
 572   tabstrip_->AddTabAt(index, data, is_active);
 573 }
 574
 575 void BrowserTabStripController::UpdateLayoutType() {
 576   bool adjust_layout = false;
 577   TabStripLayoutType layout_type =
 578       DetermineTabStripLayout(g_browser_process->local_state(),
 579                               browser_->host_desktop_type(), &adjust_layout);
 580   tabstrip_->SetLayoutType(layout_type, adjust_layout);
 581 }
 582
 583 void BrowserTabStripController::OnFindURLMimeTypeCompleted(
 584     const GURL& url,
 585     const std::string& mime_type) {
 586   // Check whether the mime type, if given, is known to be supported or whether
 587   // there is a plugin that supports the mime type (e.g. PDF).
 588   // TODO(bauerb): This possibly uses stale information, but it's guaranteed not
 589   // to do disk access.
 590   content::WebPluginInfo plugin;
 591   tabstrip_->FileSupported(
 592       url,
 593       mime_type.empty() ||
 594       net::IsSupportedMimeType(mime_type) ||
 595       content::PluginService::GetInstance()->GetPluginInfo(
 596           -1,                // process ID
 597           MSG_ROUTING_NONE,  // routing ID
 598           model_->profile()->GetResourceContext(),
 599           url, GURL(), mime_type, false,
 600           NULL, &plugin, NULL));
 601 }