chrome/browser/ui/fullscreen/fullscreen_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/fullscreen/fullscreen_controller.h"
   6
   7 #include "base/bind.h"
   8 #include "base/command_line.h"
   9 #include "base/message_loop/message_loop.h"
  10 #include "chrome/browser/app_mode/app_mode_utils.h"
  11 #include "chrome/browser/chrome_notification_types.h"
  12 #include "chrome/browser/content_settings/host_content_settings_map.h"
  13 #include "chrome/browser/download/download_shelf.h"
  14 #include "chrome/browser/fullscreen.h"
  15 #include "chrome/browser/profiles/profile.h"
  16 #include "chrome/browser/ui/browser.h"
  17 #include "chrome/browser/ui/browser_window.h"
  18 #include "chrome/browser/ui/status_bubble.h"
  19 #include "chrome/browser/ui/tabs/tab_strip_model.h"
  20 #include "chrome/common/chrome_switches.h"
  21 #include "content/public/browser/navigation_details.h"
  22 #include "content/public/browser/navigation_entry.h"
  23 #include "content/public/browser/notification_service.h"
  24 #include "content/public/browser/render_view_host.h"
  25 #include "content/public/browser/render_widget_host_view.h"
  26 #include "content/public/browser/user_metrics.h"
  27 #include "content/public/browser/web_contents.h"
  28 #include "content/public/browser/web_contents_view.h"
  29 #include "extensions/common/extension.h"
  30
  31 #if defined(OS_MACOSX)
  32 #include "base/mac/mac_util.h"
  33 #else
  34 #include "base/prefs/pref_service.h"
  35 #include "chrome/common/pref_names.h"
  36 #endif
  37
  38 using base::UserMetricsAction;
  39 using content::RenderViewHost;
  40 using content::WebContents;
  41
  42 FullscreenController::FullscreenController(Browser* browser)
  43     : browser_(browser),
  44       window_(browser->window()),
  45       profile_(browser->profile()),
  46       fullscreened_tab_(NULL),
  47       state_prior_to_tab_fullscreen_(STATE_INVALID),
  48       tab_fullscreen_accepted_(false),
  49       toggled_into_fullscreen_(false),
  50       mouse_lock_tab_(NULL),
  51       mouse_lock_state_(MOUSELOCK_NOT_REQUESTED),
  52       reentrant_window_state_change_call_check_(false),
  53       is_privileged_fullscreen_for_testing_(false),
  54       ptr_factory_(this) {
  55   DCHECK(window_);
  56   DCHECK(profile_);
  57 }
  58
  59 FullscreenController::~FullscreenController() {
  60 }
  61
  62 bool FullscreenController::IsFullscreenForBrowser() const {
  63   return window_->IsFullscreen() && !IsFullscreenCausedByTab();
  64 }
  65
  66 void FullscreenController::ToggleFullscreenMode() {
  67   extension_caused_fullscreen_ = GURL();
  68   ToggleFullscreenModeInternal(BROWSER);
  69 }
  70
  71 bool FullscreenController::IsFullscreenForTabOrPending() const {
  72   return fullscreened_tab_ != NULL;
  73 }
  74
  75 bool FullscreenController::IsFullscreenForTabOrPending(
  76     const WebContents* web_contents) const {
  77   if (web_contents == fullscreened_tab_) {
  78     DCHECK(web_contents == browser_->tab_strip_model()->GetActiveWebContents());
  79     DCHECK(!IsFullscreenWithinTabPossible() ||
  80            web_contents->GetCapturerCount() == 0);
  81     return true;
  82   }
  83   return IsFullscreenForCapturedTab(web_contents);
  84 }
  85
  86 bool FullscreenController::IsFullscreenCausedByTab() const {
  87   return state_prior_to_tab_fullscreen_ == STATE_NORMAL;
  88 }
  89
  90 void FullscreenController::ToggleFullscreenModeForTab(WebContents* web_contents,
  91                                                       bool enter_fullscreen) {
  92   if (MaybeToggleFullscreenForCapturedTab(web_contents, enter_fullscreen)) {
  93     // During tab capture of fullscreen-within-tab views, the browser window
  94     // fullscreen state is unchanged, so return now.
  95     return;
  96   }
  97   if (fullscreened_tab_) {
  98     if (web_contents != fullscreened_tab_)
  99       return;
 100   } else if (
 101       web_contents != browser_->tab_strip_model()->GetActiveWebContents()) {
 102     return;
 103   }
 104   if (IsFullscreenForTabOrPending() == enter_fullscreen)
 105     return;
 106
 107 #if defined(OS_WIN)
 108   // For now, avoid breaking when initiating full screen tab mode while in
 109   // a metro snap.
 110   // TODO(robertshield): Find a way to reconcile tab-initiated fullscreen
 111   //                     modes with metro snap.
 112   if (IsInMetroSnapMode())
 113     return;
 114 #endif
 115
 116   bool in_browser_or_tab_fullscreen_mode = window_->IsFullscreen();
 117   bool window_is_fullscreen_with_chrome = false;
 118 #if defined(OS_MACOSX)
 119   window_is_fullscreen_with_chrome = window_->IsFullscreenWithChrome();
 120 #endif
 121
 122   if (enter_fullscreen) {
 123     SetFullscreenedTab(web_contents);
 124     if (!in_browser_or_tab_fullscreen_mode) {
 125       state_prior_to_tab_fullscreen_ = STATE_NORMAL;
 126       ToggleFullscreenModeInternal(TAB);
 127     } else if (window_is_fullscreen_with_chrome) {
 128 #if defined(OS_MACOSX)
 129       state_prior_to_tab_fullscreen_ = STATE_BROWSER_FULLSCREEN_WITH_CHROME;
 130       EnterFullscreenModeInternal(TAB);
 131 #else
 132       NOTREACHED();
 133 #endif
 134     } else {
 135       state_prior_to_tab_fullscreen_ = STATE_BROWSER_FULLSCREEN_NO_CHROME;
 136
 137       // We need to update the fullscreen exit bubble, e.g., going from browser
 138       // fullscreen to tab fullscreen will need to show different content.
 139       const GURL& url = web_contents->GetURL();
 140       if (!tab_fullscreen_accepted_) {
 141         tab_fullscreen_accepted_ =
 142             GetFullscreenSetting(url) == CONTENT_SETTING_ALLOW;
 143       }
 144       UpdateFullscreenExitBubbleContent();
 145
 146       // This is only a change between Browser and Tab fullscreen. We generate
 147       // a fullscreen notification now because there is no window change.
 148       PostFullscreenChangeNotification(true);
 149     }
 150   } else {
 151     if (in_browser_or_tab_fullscreen_mode) {
 152       if (IsFullscreenCausedByTab()) {
 153         ToggleFullscreenModeInternal(TAB);
 154       } else {
 155 #if defined(OS_MACOSX)
 156         if (state_prior_to_tab_fullscreen_ ==
 157             STATE_BROWSER_FULLSCREEN_WITH_CHROME) {
 158           EnterFullscreenModeInternal(BROWSER_WITH_CHROME);
 159         } else {
 160           // Clear the bubble URL, which forces the Mac UI to redraw.
 161           UpdateFullscreenExitBubbleContent();
 162         }
 163 #endif
 164         // If currently there is a tab in "tab fullscreen" mode and fullscreen
 165         // was not caused by it (i.e., previously it was in "browser fullscreen"
 166         // mode), we need to switch back to "browser fullscreen" mode. In this
 167         // case, all we have to do is notifying the tab that it has exited "tab
 168         // fullscreen" mode.
 169         NotifyTabOfExitIfNecessary();
 170
 171         // This is only a change between Browser and Tab fullscreen. We generate
 172         // a fullscreen notification now because there is no window change.
 173         PostFullscreenChangeNotification(true);
 174       }
 175     }
 176   }
 177 }
 178
 179 void FullscreenController::ToggleFullscreenModeWithExtension(
 180     const GURL& extension_url) {
 181   // |extension_caused_fullscreen_| will be reset if this causes fullscreen to
 182   // exit.
 183   extension_caused_fullscreen_ = extension_url;
 184   ToggleFullscreenModeInternal(BROWSER);
 185 }
 186
 187 bool FullscreenController::IsInMetroSnapMode() {
 188 #if defined(OS_WIN)
 189   return window_->IsInMetroSnapMode();
 190 #else
 191   return false;
 192 #endif
 193 }
 194
 195 #if defined(OS_WIN)
 196 void FullscreenController::SetMetroSnapMode(bool enable) {
 197   reentrant_window_state_change_call_check_ = false;
 198
 199   toggled_into_fullscreen_ = false;
 200   window_->SetMetroSnapMode(enable);
 201
 202   // FullscreenController unit tests for metro snap assume that on Windows calls
 203   // to WindowFullscreenStateChanged are reentrant. If that assumption is
 204   // invalidated, the tests must be updated to maintain coverage.
 205   CHECK(reentrant_window_state_change_call_check_);
 206 }
 207 #endif  // defined(OS_WIN)
 208
 209 #if defined(OS_MACOSX)
 210 void FullscreenController::ToggleFullscreenWithChrome() {
 211   // This method cannot be called if simplified fullscreen is enabled.
 212   const CommandLine* command_line = CommandLine::ForCurrentProcess();
 213   DCHECK(!command_line->HasSwitch(switches::kEnableSimplifiedFullscreen));
 214   ToggleFullscreenModeInternal(BROWSER_WITH_CHROME);
 215 }
 216 #endif
 217
 218 bool FullscreenController::IsMouseLockRequested() const {
 219   return mouse_lock_state_ == MOUSELOCK_REQUESTED;
 220 }
 221
 222 bool FullscreenController::IsMouseLocked() const {
 223   return mouse_lock_state_ == MOUSELOCK_ACCEPTED ||
 224          mouse_lock_state_ == MOUSELOCK_ACCEPTED_SILENTLY;
 225 }
 226
 227 void FullscreenController::RequestToLockMouse(WebContents* web_contents,
 228                                               bool user_gesture,
 229                                               bool last_unlocked_by_target) {
 230   DCHECK(!IsMouseLocked());
 231   NotifyMouseLockChange();
 232
 233   // Must have a user gesture to prevent misbehaving sites from constantly
 234   // re-locking the mouse. Exceptions are when the page has unlocked
 235   // (i.e. not the user), or if we're in tab fullscreen (user gesture required
 236   // for that)
 237   if (!last_unlocked_by_target && !user_gesture &&
 238       !IsFullscreenForTabOrPending(web_contents)) {
 239     web_contents->GotResponseToLockMouseRequest(false);
 240     return;
 241   }
 242   SetMouseLockTab(web_contents);
 243   FullscreenExitBubbleType bubble_type = GetFullscreenExitBubbleType();
 244
 245   switch (GetMouseLockSetting(web_contents->GetURL())) {
 246     case CONTENT_SETTING_ALLOW:
 247       // If bubble already displaying buttons we must not lock the mouse yet,
 248       // or it would prevent pressing those buttons. Instead, merge the request.
 249       if (!IsPrivilegedFullscreenForTab() &&
 250           fullscreen_bubble::ShowButtonsForType(bubble_type)) {
 251         mouse_lock_state_ = MOUSELOCK_REQUESTED;
 252       } else {
 253         // Lock mouse.
 254         if (web_contents->GotResponseToLockMouseRequest(true)) {
 255           if (last_unlocked_by_target) {
 256             mouse_lock_state_ = MOUSELOCK_ACCEPTED_SILENTLY;
 257           } else {
 258             mouse_lock_state_ = MOUSELOCK_ACCEPTED;
 259           }
 260         } else {
 261           SetMouseLockTab(NULL);
 262           mouse_lock_state_ = MOUSELOCK_NOT_REQUESTED;
 263         }
 264       }
 265       break;
 266     case CONTENT_SETTING_BLOCK:
 267       web_contents->GotResponseToLockMouseRequest(false);
 268       SetMouseLockTab(NULL);
 269       mouse_lock_state_ = MOUSELOCK_NOT_REQUESTED;
 270       break;
 271     case CONTENT_SETTING_ASK:
 272       mouse_lock_state_ = MOUSELOCK_REQUESTED;
 273       break;
 274     default:
 275       NOTREACHED();
 276   }
 277   UpdateFullscreenExitBubbleContent();
 278 }
 279
 280 void FullscreenController::OnTabDeactivated(WebContents* web_contents) {
 281   if (web_contents == fullscreened_tab_ || web_contents == mouse_lock_tab_)
 282     ExitTabFullscreenOrMouseLockIfNecessary();
 283 }
 284
 285 void FullscreenController::OnTabDetachedFromView(WebContents* old_contents) {
 286   if (!IsFullscreenForCapturedTab(old_contents))
 287     return;
 288
 289   // A fullscreen-within-tab view undergoing screen capture has been detached
 290   // and is no longer visible to the user. Set it to exactly the WebContents'
 291   // preferred size. See 'FullscreenWithinTab Note'.
 292   //
 293   // When the user later selects the tab to show |old_contents| again, UI code
 294   // elsewhere (e.g., views::WebView) will resize the view to fit within the
 295   // browser window once again.
 296   if (old_contents->GetCapturerCount() == 0 ||
 297       old_contents->GetPreferredSize().IsEmpty()) {
 298     // Do nothing if tab capture ended after toggling fullscreen, or a preferred
 299     // size was never specified by the capturer.
 300     return;
 301   }
 302   content::RenderWidgetHostView* const current_fs_view =
 303       old_contents->GetFullscreenRenderWidgetHostView();
 304   if (current_fs_view)
 305     current_fs_view->SetSize(old_contents->GetPreferredSize());
 306   old_contents->GetView()->SizeContents(old_contents->GetPreferredSize());
 307 }
 308
 309 void FullscreenController::OnTabClosing(WebContents* web_contents) {
 310   if (IsFullscreenForCapturedTab(web_contents)) {
 311     RenderViewHost* const rvh = web_contents->GetRenderViewHost();
 312     if (rvh)
 313       rvh->ExitFullscreen();
 314   } else if (web_contents == fullscreened_tab_ ||
 315              web_contents == mouse_lock_tab_) {
 316     ExitTabFullscreenOrMouseLockIfNecessary();
 317     // The call to exit fullscreen may result in asynchronous notification of
 318     // fullscreen state change (e.g., on Linux). We don't want to rely on it
 319     // to call NotifyTabOfExitIfNecessary(), because at that point
 320     // |fullscreened_tab_| may not be valid. Instead, we call it here to clean
 321     // up tab fullscreen related state.
 322     NotifyTabOfExitIfNecessary();
 323   }
 324 }
 325
 326 void FullscreenController::WindowFullscreenStateChanged() {
 327   reentrant_window_state_change_call_check_ = true;
 328
 329   bool exiting_fullscreen = !window_->IsFullscreen();
 330
 331   PostFullscreenChangeNotification(!exiting_fullscreen);
 332   if (exiting_fullscreen) {
 333     toggled_into_fullscreen_ = false;
 334     extension_caused_fullscreen_ = GURL();
 335     NotifyTabOfExitIfNecessary();
 336   }
 337   if (exiting_fullscreen) {
 338     window_->GetDownloadShelf()->Unhide();
 339   } else {
 340     window_->GetDownloadShelf()->Hide();
 341     if (window_->GetStatusBubble())
 342       window_->GetStatusBubble()->Hide();
 343   }
 344 }
 345
 346 bool FullscreenController::HandleUserPressedEscape() {
 347   WebContents* const active_web_contents =
 348       browser_->tab_strip_model()->GetActiveWebContents();
 349   if (IsFullscreenForCapturedTab(active_web_contents)) {
 350     RenderViewHost* const rvh = active_web_contents->GetRenderViewHost();
 351     if (rvh)
 352       rvh->ExitFullscreen();
 353     return true;
 354   } else if (IsFullscreenForTabOrPending() ||
 355              IsMouseLocked() || IsMouseLockRequested()) {
 356     ExitTabFullscreenOrMouseLockIfNecessary();
 357     return true;
 358   }
 359
 360   return false;
 361 }
 362
 363 void FullscreenController::ExitTabOrBrowserFullscreenToPreviousState() {
 364   if (IsFullscreenForTabOrPending())
 365     ExitTabFullscreenOrMouseLockIfNecessary();
 366   else if (IsFullscreenForBrowser())
 367     ExitFullscreenModeInternal();
 368 }
 369
 370 void FullscreenController::OnAcceptFullscreenPermission() {
 371   FullscreenExitBubbleType bubble_type = GetFullscreenExitBubbleType();
 372   bool mouse_lock = false;
 373   bool fullscreen = false;
 374   fullscreen_bubble::PermissionRequestedByType(bubble_type, &fullscreen,
 375                                                &mouse_lock);
 376   DCHECK(!(fullscreen && tab_fullscreen_accepted_));
 377   DCHECK(!(mouse_lock && IsMouseLocked()));
 378
 379   HostContentSettingsMap* settings_map = profile_->GetHostContentSettingsMap();
 380
 381   GURL url = GetFullscreenExitBubbleURL();
 382   ContentSettingsPattern pattern = ContentSettingsPattern::FromURL(url);
 383
 384   if (mouse_lock && !IsMouseLocked()) {
 385     DCHECK(IsMouseLockRequested());
 386     // TODO(markusheintz): We should allow patterns for all possible URLs here.
 387     if (pattern.IsValid()) {
 388       settings_map->SetContentSetting(
 389           pattern, ContentSettingsPattern::Wildcard(),
 390           CONTENT_SETTINGS_TYPE_MOUSELOCK, std::string(),
 391           CONTENT_SETTING_ALLOW);
 392     }
 393
 394     if (mouse_lock_tab_ &&
 395         mouse_lock_tab_->GotResponseToLockMouseRequest(true)) {
 396       mouse_lock_state_ = MOUSELOCK_ACCEPTED;
 397     } else {
 398       mouse_lock_state_ = MOUSELOCK_NOT_REQUESTED;
 399       SetMouseLockTab(NULL);
 400     }
 401     NotifyMouseLockChange();
 402   }
 403
 404   if (fullscreen && !tab_fullscreen_accepted_) {
 405     DCHECK(fullscreened_tab_);
 406     if (pattern.IsValid()) {
 407       settings_map->SetContentSetting(
 408           pattern, ContentSettingsPattern::Wildcard(),
 409           CONTENT_SETTINGS_TYPE_FULLSCREEN, std::string(),
 410           CONTENT_SETTING_ALLOW);
 411     }
 412     tab_fullscreen_accepted_ = true;
 413   }
 414   UpdateFullscreenExitBubbleContent();
 415 }
 416
 417 void FullscreenController::OnDenyFullscreenPermission() {
 418   if (!fullscreened_tab_ && !mouse_lock_tab_)
 419     return;
 420
 421   if (IsMouseLockRequested()) {
 422     mouse_lock_state_ = MOUSELOCK_NOT_REQUESTED;
 423     if (mouse_lock_tab_)
 424       mouse_lock_tab_->GotResponseToLockMouseRequest(false);
 425     SetMouseLockTab(NULL);
 426     NotifyMouseLockChange();
 427
 428     // UpdateFullscreenExitBubbleContent() must be called, but to avoid
 429     // duplicate calls we do so only if not adjusting the fullscreen state
 430     // below, which also calls UpdateFullscreenExitBubbleContent().
 431     if (!IsFullscreenForTabOrPending())
 432       UpdateFullscreenExitBubbleContent();
 433   }
 434
 435   if (IsFullscreenForTabOrPending())
 436     ExitTabFullscreenOrMouseLockIfNecessary();
 437 }
 438
 439 void FullscreenController::LostMouseLock() {
 440   mouse_lock_state_ = MOUSELOCK_NOT_REQUESTED;
 441   SetMouseLockTab(NULL);
 442   NotifyMouseLockChange();
 443   UpdateFullscreenExitBubbleContent();
 444 }
 445
 446 void FullscreenController::Observe(int type,
 447     const content::NotificationSource& source,
 448     const content::NotificationDetails& details) {
 449   switch (type) {
 450     case content::NOTIFICATION_NAV_ENTRY_COMMITTED:
 451       if (content::Details<content::LoadCommittedDetails>(details)->
 452               is_navigation_to_different_page()) {
 453         ExitTabFullscreenOrMouseLockIfNecessary();
 454       }
 455       break;
 456
 457     default:
 458       NOTREACHED() << "Got a notification we didn't register for.";
 459   }
 460 }
 461
 462 GURL FullscreenController::GetFullscreenExitBubbleURL() const {
 463   if (fullscreened_tab_)
 464     return fullscreened_tab_->GetURL();
 465   else if (mouse_lock_tab_)
 466     return mouse_lock_tab_->GetURL();
 467   else if (!extension_caused_fullscreen_.is_empty())
 468     return extension_caused_fullscreen_;
 469   else
 470     return GURL();
 471 }
 472
 473 FullscreenExitBubbleType FullscreenController::GetFullscreenExitBubbleType()
 474     const {
 475   // In kiosk and exclusive app mode we always want to be fullscreen and do not
 476   // want to show exit instructions for browser mode fullscreen.
 477   bool app_mode = false;
 478 #if !defined(OS_MACOSX)  // App mode (kiosk) is not available on Mac yet.
 479   app_mode = chrome::IsRunningInAppMode();
 480 #endif
 481
 482   if (mouse_lock_state_ == MOUSELOCK_ACCEPTED_SILENTLY) {
 483     return FEB_TYPE_NONE;
 484   }
 485
 486   if (fullscreened_tab_) {
 487     if (tab_fullscreen_accepted_) {
 488       if (IsPrivilegedFullscreenForTab()) {
 489         return FEB_TYPE_NONE;
 490       } else if (IsMouseLocked()) {
 491         return FEB_TYPE_FULLSCREEN_MOUSELOCK_EXIT_INSTRUCTION;
 492       } else if (IsMouseLockRequested()) {
 493         return FEB_TYPE_MOUSELOCK_BUTTONS;
 494       } else {
 495         return FEB_TYPE_FULLSCREEN_EXIT_INSTRUCTION;
 496       }
 497     } else {  // Full screen not yet accepted.
 498       if (IsMouseLockRequested()) {
 499         return FEB_TYPE_FULLSCREEN_MOUSELOCK_BUTTONS;
 500       } else {
 501         return FEB_TYPE_FULLSCREEN_BUTTONS;
 502       }
 503     }
 504   } else {  // Not tab full screen.
 505     if (IsMouseLocked()) {
 506       return FEB_TYPE_MOUSELOCK_EXIT_INSTRUCTION;
 507     } else if (IsMouseLockRequested()) {
 508       return FEB_TYPE_MOUSELOCK_BUTTONS;
 509     } else {
 510       if (!extension_caused_fullscreen_.is_empty()) {
 511         return FEB_TYPE_BROWSER_EXTENSION_FULLSCREEN_EXIT_INSTRUCTION;
 512       } else if (toggled_into_fullscreen_ && !app_mode) {
 513         return FEB_TYPE_BROWSER_FULLSCREEN_EXIT_INSTRUCTION;
 514       } else {
 515         return FEB_TYPE_NONE;
 516       }
 517     }
 518   }
 519   NOTREACHED();
 520   return FEB_TYPE_NONE;
 521 }
 522
 523 void FullscreenController::UpdateNotificationRegistrations() {
 524   if (fullscreened_tab_ && mouse_lock_tab_)
 525     DCHECK(fullscreened_tab_ == mouse_lock_tab_);
 526
 527   WebContents* tab = fullscreened_tab_ ? fullscreened_tab_ : mouse_lock_tab_;
 528
 529   if (tab && registrar_.IsEmpty()) {
 530     registrar_.Add(this, content::NOTIFICATION_NAV_ENTRY_COMMITTED,
 531         content::Source<content::NavigationController>(&tab->GetController()));
 532   } else if (!tab && !registrar_.IsEmpty()) {
 533     registrar_.RemoveAll();
 534   }
 535 }
 536
 537 void FullscreenController::PostFullscreenChangeNotification(
 538     bool is_fullscreen) {
 539   base::MessageLoop::current()->PostTask(
 540       FROM_HERE,
 541       base::Bind(&FullscreenController::NotifyFullscreenChange,
 542                  ptr_factory_.GetWeakPtr(),
 543                  is_fullscreen));
 544 }
 545
 546 void FullscreenController::NotifyFullscreenChange(bool is_fullscreen) {
 547   content::NotificationService::current()->Notify(
 548       chrome::NOTIFICATION_FULLSCREEN_CHANGED,
 549       content::Source<FullscreenController>(this),
 550       content::Details<bool>(&is_fullscreen));
 551 }
 552
 553 void FullscreenController::NotifyTabOfExitIfNecessary() {
 554   if (fullscreened_tab_) {
 555     RenderViewHost* rvh = fullscreened_tab_->GetRenderViewHost();
 556     SetFullscreenedTab(NULL);
 557     state_prior_to_tab_fullscreen_ = STATE_INVALID;
 558     tab_fullscreen_accepted_ = false;
 559     if (rvh)
 560       rvh->ExitFullscreen();
 561   }
 562
 563   if (mouse_lock_tab_) {
 564     if (IsMouseLockRequested()) {
 565       mouse_lock_tab_->GotResponseToLockMouseRequest(false);
 566       NotifyMouseLockChange();
 567     } else {
 568       UnlockMouse();
 569     }
 570     SetMouseLockTab(NULL);
 571     mouse_lock_state_ = MOUSELOCK_NOT_REQUESTED;
 572   }
 573
 574   UpdateFullscreenExitBubbleContent();
 575 }
 576
 577 void FullscreenController::NotifyMouseLockChange() {
 578   content::NotificationService::current()->Notify(
 579       chrome::NOTIFICATION_MOUSE_LOCK_CHANGED,
 580       content::Source<FullscreenController>(this),
 581       content::NotificationService::NoDetails());
 582 }
 583
 584 void FullscreenController::ToggleFullscreenModeInternal(
 585     FullscreenInternalOption option) {
 586 #if defined(OS_WIN)
 587   // When in Metro snap mode, toggling in and out of fullscreen is prevented.
 588   if (IsInMetroSnapMode())
 589     return;
 590 #endif
 591
 592   bool enter_fullscreen = !window_->IsFullscreen();
 593 #if defined(OS_MACOSX)
 594   // When a Mac user requests a toggle they may be toggling between
 595   // FullscreenWithoutChrome and FullscreenWithChrome.
 596   if (!IsFullscreenForTabOrPending()) {
 597     if (option == BROWSER_WITH_CHROME)
 598       enter_fullscreen |= window_->IsFullscreenWithoutChrome();
 599     else
 600       enter_fullscreen |= window_->IsFullscreenWithChrome();
 601   }
 602 #endif
 603
 604   // In kiosk mode, we always want to be fullscreen. When the browser first
 605   // starts we're not yet fullscreen, so let the initial toggle go through.
 606   if (chrome::IsRunningInAppMode() && window_->IsFullscreen())
 607     return;
 608
 609 #if !defined(OS_MACOSX)
 610   // Do not enter fullscreen mode if disallowed by pref. This prevents the user
 611   // from manually entering fullscreen mode and also disables kiosk mode on
 612   // desktop platforms.
 613   if (enter_fullscreen &&
 614       !profile_->GetPrefs()->GetBoolean(prefs::kFullscreenAllowed)) {
 615     return;
 616   }
 617 #endif
 618
 619   if (enter_fullscreen)
 620     EnterFullscreenModeInternal(option);
 621   else
 622     ExitFullscreenModeInternal();
 623 }
 624
 625 void FullscreenController::EnterFullscreenModeInternal(
 626     FullscreenInternalOption option) {
 627   toggled_into_fullscreen_ = true;
 628   GURL url;
 629   if (option == TAB) {
 630     url = browser_->tab_strip_model()->GetActiveWebContents()->GetURL();
 631     tab_fullscreen_accepted_ =
 632         GetFullscreenSetting(url) == CONTENT_SETTING_ALLOW;
 633   } else {
 634     if (!extension_caused_fullscreen_.is_empty())
 635       url = extension_caused_fullscreen_;
 636   }
 637
 638   if (option == BROWSER)
 639     content::RecordAction(UserMetricsAction("ToggleFullscreen"));
 640   // TODO(scheib): Record metrics for WITH_CHROME, without counting transitions
 641   // from tab fullscreen out to browser with chrome.
 642
 643 #if defined(OS_MACOSX)
 644   if (option == BROWSER_WITH_CHROME) {
 645     CHECK(chrome::mac::SupportsSystemFullscreen());
 646     window_->EnterFullscreenWithChrome();
 647   } else {
 648 #else
 649   {
 650 #endif
 651     window_->EnterFullscreen(url, GetFullscreenExitBubbleType());
 652   }
 653
 654   UpdateFullscreenExitBubbleContent();
 655
 656   // Once the window has become fullscreen it'll call back to
 657   // WindowFullscreenStateChanged(). We don't do this immediately as
 658   // BrowserWindow::EnterFullscreen() asks for bookmark_bar_state_, so we let
 659   // the BrowserWindow invoke WindowFullscreenStateChanged when appropriate.
 660 }
 661
 662 void FullscreenController::ExitFullscreenModeInternal() {
 663   toggled_into_fullscreen_ = false;
 664 #if defined(OS_MACOSX)
 665   // Mac windows report a state change instantly, and so we must also clear
 666   // state_prior_to_tab_fullscreen_ to match them else other logic using
 667   // state_prior_to_tab_fullscreen_ will be incorrect.
 668   NotifyTabOfExitIfNecessary();
 669 #endif
 670   window_->ExitFullscreen();
 671   extension_caused_fullscreen_ = GURL();
 672
 673   UpdateFullscreenExitBubbleContent();
 674 }
 675
 676 void FullscreenController::SetFullscreenedTab(WebContents* tab) {
 677   fullscreened_tab_ = tab;
 678   UpdateNotificationRegistrations();
 679 }
 680
 681 void FullscreenController::SetMouseLockTab(WebContents* tab) {
 682   mouse_lock_tab_ = tab;
 683   UpdateNotificationRegistrations();
 684 }
 685
 686 void FullscreenController::ExitTabFullscreenOrMouseLockIfNecessary() {
 687   if (IsFullscreenForTabOrPending())
 688     ToggleFullscreenModeForTab(fullscreened_tab_, false);
 689   else
 690     NotifyTabOfExitIfNecessary();
 691 }
 692
 693 void FullscreenController::UpdateFullscreenExitBubbleContent() {
 694   GURL url = GetFullscreenExitBubbleURL();
 695   FullscreenExitBubbleType bubble_type = GetFullscreenExitBubbleType();
 696
 697   // If bubble displays buttons, unlock mouse to allow pressing them.
 698   if (fullscreen_bubble::ShowButtonsForType(bubble_type) && IsMouseLocked())
 699     UnlockMouse();
 700
 701   window_->UpdateFullscreenExitBubbleContent(url, bubble_type);
 702 }
 703
 704 ContentSetting
 705 FullscreenController::GetFullscreenSetting(const GURL& url) const {
 706   if (IsPrivilegedFullscreenForTab() || url.SchemeIsFile())
 707     return CONTENT_SETTING_ALLOW;
 708
 709   return profile_->GetHostContentSettingsMap()->GetContentSetting(url, url,
 710       CONTENT_SETTINGS_TYPE_FULLSCREEN, std::string());
 711 }
 712
 713 ContentSetting
 714 FullscreenController::GetMouseLockSetting(const GURL& url) const {
 715   if (IsPrivilegedFullscreenForTab() || url.SchemeIsFile())
 716     return CONTENT_SETTING_ALLOW;
 717
 718   HostContentSettingsMap* settings_map = profile_->GetHostContentSettingsMap();
 719   return settings_map->GetContentSetting(url, url,
 720       CONTENT_SETTINGS_TYPE_MOUSELOCK, std::string());
 721 }
 722
 723 bool FullscreenController::IsPrivilegedFullscreenForTab() const {
 724   const bool embedded_widget_present =
 725       fullscreened_tab_ &&
 726       fullscreened_tab_->GetFullscreenRenderWidgetHostView() &&
 727       IsFullscreenWithinTabPossible();
 728   return embedded_widget_present || is_privileged_fullscreen_for_testing_;
 729 }
 730
 731 void FullscreenController::SetPrivilegedFullscreenForTesting(
 732     bool is_privileged) {
 733   is_privileged_fullscreen_for_testing_ = is_privileged;
 734 }
 735
 736 bool FullscreenController::IsFullscreenWithinTabPossible() const {
 737   return implicit_cast<const content::WebContentsDelegate*>(browser_)->
 738       EmbedsFullscreenWidget();
 739 }
 740
 741 bool FullscreenController::MaybeToggleFullscreenForCapturedTab(
 742     WebContents* web_contents, bool enter_fullscreen) {
 743   if (!IsFullscreenWithinTabPossible())
 744     return false;
 745
 746   if (enter_fullscreen) {
 747     if (web_contents->GetCapturerCount() > 0) {
 748       captured_tabs_.insert(web_contents);
 749       return true;
 750     }
 751   } else {
 752     const std::set<const WebContents*>::iterator it =
 753         captured_tabs_.find(web_contents);
 754     if (it != captured_tabs_.end()) {
 755       captured_tabs_.erase(it);
 756       return true;
 757     }
 758   }
 759
 760   return false;
 761 }
 762
 763 bool FullscreenController::IsFullscreenForCapturedTab(
 764     const WebContents* web_contents) const {
 765   if (captured_tabs_.find(web_contents) != captured_tabs_.end()) {
 766     DCHECK(IsFullscreenWithinTabPossible());
 767     DCHECK_NE(fullscreened_tab_, web_contents);
 768     return true;
 769   }
 770   return false;
 771 }
 772
 773 void FullscreenController::UnlockMouse() {
 774   if (!mouse_lock_tab_)
 775     return;
 776   content::RenderWidgetHostView* mouse_lock_view =
 777       (fullscreened_tab_ == mouse_lock_tab_ && IsPrivilegedFullscreenForTab()) ?
 778       mouse_lock_tab_->GetFullscreenRenderWidgetHostView() : NULL;
 779   if (!mouse_lock_view) {
 780     RenderViewHost* const rvh = mouse_lock_tab_->GetRenderViewHost();
 781     if (rvh)
 782       mouse_lock_view = rvh->GetView();
 783   }
 784   if (mouse_lock_view)
 785     mouse_lock_view->UnlockMouse();
 786 }