Split out fullscreen logic from Browser into FullscreenController.

chrome/browser/ui/fullscreen_controller.cc

+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/ui/fullscreen_controller.h"
+
+#include "base/bind.h"
+#include "chrome/browser/content_settings/host_content_settings_map.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/ui/browser.h"
+#include "chrome/browser/ui/browser_window.h"
+#include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
+#include "chrome/common/chrome_notification_types.h"
+#include "content/browser/user_metrics.h"
+#include "content/public/browser/notification_service.h"
+
+FullscreenController::FullscreenController(BrowserWindow* window,
+                                           Profile* profile,
+                                           Browser* browser)
+  : window_(window),
+    profile_(profile),
+    browser_(browser),
+    fullscreened_tab_(NULL),
+    tab_caused_fullscreen_(false),
+    tab_fullscreen_accepted_(false),
+    mouse_lock_state_(MOUSELOCK_NOT_REQUESTED),
+    method_factory_(ALLOW_THIS_IN_INITIALIZER_LIST(this)) {
+}
+
+FullscreenController::~FullscreenController() {}
+
+bool FullscreenController::IsFullscreenForTab() const {
+  return fullscreened_tab_ != NULL;
+}
+
+bool FullscreenController::IsFullscreenForTab(const TabContents* tab) const {
+  const TabContentsWrapper* wrapper =
+      TabContentsWrapper::GetCurrentWrapperForContents(tab);
+  if (!wrapper || (wrapper != fullscreened_tab_))
+    return false;
+  DCHECK(tab == browser_->GetSelectedTabContents());
+  DCHECK(window_->IsFullscreen());
+  return true;
+}
+
+void FullscreenController::RequestToLockMouse(TabContents* tab) {
+  // Mouse Lock is only permitted when browser is in tab fullscreen.
+  if (!IsFullscreenForTab(tab)) {
+    tab->GotResponseToLockMouseRequest(false);
+    return;
+  }
+
+  if (mouse_lock_state_ == MOUSELOCK_ACCEPTED) {
+    tab->GotResponseToLockMouseRequest(true);
+    return;
+  }
+
+  switch (GetMouseLockSetting(tab->GetURL())) {
+    case CONTENT_SETTING_ALLOW:
+      mouse_lock_state_ = MOUSELOCK_ACCEPTED;
+      tab->GotResponseToLockMouseRequest(true);
+      break;
+    case CONTENT_SETTING_BLOCK:
+      mouse_lock_state_ = MOUSELOCK_NOT_REQUESTED;
+      tab->GotResponseToLockMouseRequest(false);
+      break;
+    case CONTENT_SETTING_ASK:
+      mouse_lock_state_ = MOUSELOCK_REQUESTED;
+      break;
+    default:
+      NOTREACHED();
+  }
+  UpdateFullscreenExitBubbleContent();
+}
+
+void FullscreenController::ToggleFullscreenModeForTab(TabContents* tab,
+                                                      bool enter_fullscreen) {
+  if (tab != browser_->GetSelectedTabContents())
+    return;
+
+  bool in_browser_or_tab_fullscreen_mode;
+#if defined(OS_MACOSX)
+  in_browser_or_tab_fullscreen_mode = window_->InPresentationMode();
+#else
+  in_browser_or_tab_fullscreen_mode = window_->IsFullscreen();
+#endif
+
+  if (enter_fullscreen) {
+    fullscreened_tab_ = TabContentsWrapper::GetCurrentWrapperForContents(tab);
+    if (!in_browser_or_tab_fullscreen_mode) {
+      tab_caused_fullscreen_ = true;
+#if defined(OS_MACOSX)
+      TogglePresentationMode(true);
+#else
+      ToggleFullscreenMode(true);
+#endif
+    } else {
+      // We need to update the fullscreen exit bubble, e.g., going from browser
+      // fullscreen to tab fullscreen will need to show different content.
+      const GURL& url = tab->GetURL();
+      if (!tab_fullscreen_accepted_) {
+        tab_fullscreen_accepted_ =
+            GetFullscreenSetting(url) == CONTENT_SETTING_ALLOW;
+      }
+      UpdateFullscreenExitBubbleContent();
+    }
+  } else {
+    if (in_browser_or_tab_fullscreen_mode) {
+      if (tab_caused_fullscreen_) {
+#if defined(OS_MACOSX)
+        TogglePresentationMode(true);
+#else
+        ToggleFullscreenMode(true);
+#endif
+      } else {
+        // If currently there is a tab in "tab fullscreen" mode and fullscreen
+        // was not caused by it (i.e., previously it was in "browser fullscreen"
+        // mode), we need to switch back to "browser fullscreen" mode. In this
+        // case, all we have to do is notifying the tab that it has exited "tab
+        // fullscreen" mode.
+        NotifyTabOfFullscreenExitIfNecessary();
+      }
+    }
+  }
+}
+
+#if defined(OS_MACOSX)
+void FullscreenController::TogglePresentationMode(bool for_tab) {
+  bool entering_fullscreen = !window_->InPresentationMode();
+  GURL url;
+  bool ask_permission = false;
+  if (for_tab) {
+    url = browser_->GetSelectedTabContents()->GetURL();
+    ask_permission = GetFullscreenSetting(url) != CONTENT_SETTING_ALLOW;
+  }
+  if (entering_fullscreen) {
+    FullscreenExitBubbleType type =
+        FEB_TYPE_BROWSER_FULLSCREEN_EXIT_INSTRUCTION;
+    if (for_tab) {
+      type = ask_permission ? FEB_TYPE_FULLSCREEN_BUTTONS :
+                              FEB_TYPE_FULLSCREEN_EXIT_INSTRUCTION;
+    }
+    window_->EnterPresentationMode(url, type);
+  } else {
+    window_->ExitPresentationMode();
+  }
+  WindowFullscreenStateChanged();
+}
+#endif
+
+// TODO(koz): Change |for_tab| to an enum.
+void FullscreenController::ToggleFullscreenMode(bool for_tab) {
+  bool entering_fullscreen = !window_->IsFullscreen();
+
+#if !defined(OS_MACOSX)
+  // In kiosk mode, we always want to be fullscreen. When the browser first
+  // starts we're not yet fullscreen, so let the initial toggle go through.
+  if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kKioskMode) &&
+      window_->IsFullscreen())
+    return;
+#endif
+
+  GURL url;
+  if (for_tab) {
+    url = browser_->GetSelectedTabContents()->GetURL();
+    tab_fullscreen_accepted_ = entering_fullscreen &&
+        GetFullscreenSetting(url) == CONTENT_SETTING_ALLOW;
+  } else {
+    UserMetrics::RecordAction(UserMetricsAction("ToggleFullscreen"));
+  }
+  if (entering_fullscreen)
+    window_->EnterFullscreen(url, GetFullscreenExitBubbleType());
+  else
+    window_->ExitFullscreen();
+
+  // Once the window has become fullscreen it'll call back to
+  // WindowFullscreenStateChanged(). We don't do this immediately as
+  // BrowserWindow::EnterFullscreen() asks for bookmark_bar_state_, so we let
+  // the BrowserWindow invoke WindowFullscreenStateChanged when appropriate.
+
+  // TODO: convert mac to invoke WindowFullscreenStateChanged once it updates
+  // the necessary state of the frame.
+#if defined(OS_MACOSX)
+  WindowFullscreenStateChanged();
+#endif
+}
+
+void FullscreenController::LostMouseLock() {
+  mouse_lock_state_ = MOUSELOCK_NOT_REQUESTED;
+  UpdateFullscreenExitBubbleContent();
+}
+
+void FullscreenController::OnTabClosing(TabContents* tab_contents) {
+  if (IsFullscreenForTab(tab_contents)) {
+    ExitTabbedFullscreenModeIfNecessary();
+    // The call to exit fullscreen may result in asynchronous notification of
+    // fullscreen state change (e.g., on Linux). We don't want to rely on it
+    // to call NotifyTabOfFullscreenExitIfNecessary(), because at that point
+    // |fullscreen_tab_| may not be valid. Instead, we call it here to clean up
+    // tab fullscreen related state.
+    NotifyTabOfFullscreenExitIfNecessary();
+  }
+}
+
+void FullscreenController::OnTabDeactivated(TabContentsWrapper* contents) {
+  if (contents == fullscreened_tab_)
+    ExitTabbedFullscreenModeIfNecessary();
+}
+
+void FullscreenController::OnAcceptFullscreenPermission(
+    const GURL& url,
+    FullscreenExitBubbleType bubble_type) {
+  bool mouse_lock = false;
+  bool fullscreen = false;
+  fullscreen_bubble::PermissionRequestedByType(bubble_type, &fullscreen,
+                                               &mouse_lock);
+  DCHECK(fullscreened_tab_);
+  DCHECK_NE(tab_fullscreen_accepted_, fullscreen);
+
+  HostContentSettingsMap* settings_map = profile_->GetHostContentSettingsMap();
+  if (mouse_lock) {
+    DCHECK_EQ(mouse_lock_state_, MOUSELOCK_REQUESTED);
+    settings_map->SetContentSetting(ContentSettingsPattern::FromURL(url),
+        ContentSettingsPattern::Wildcard(), CONTENT_SETTINGS_TYPE_MOUSELOCK,
+        std::string(), CONTENT_SETTING_ALLOW);
+    mouse_lock_state_ =
+        fullscreened_tab_->tab_contents()->GotResponseToLockMouseRequest(true) ?
+        MOUSELOCK_ACCEPTED : MOUSELOCK_NOT_REQUESTED;
+  }
+  if (!tab_fullscreen_accepted_) {
+    settings_map->SetContentSetting(ContentSettingsPattern::FromURL(url),
+        ContentSettingsPattern::Wildcard(), CONTENT_SETTINGS_TYPE_FULLSCREEN,
+        std::string(), CONTENT_SETTING_ALLOW);
+    tab_fullscreen_accepted_ = true;
+  }
+  UpdateFullscreenExitBubbleContent();
+}
+
+void FullscreenController::OnDenyFullscreenPermission(
+    FullscreenExitBubbleType bubble_type) {
+  bool mouse_lock = false;
+  bool fullscreen = false;
+  fullscreen_bubble::PermissionRequestedByType(bubble_type, &fullscreen,
+                                               &mouse_lock);
+  DCHECK(fullscreened_tab_);
+  DCHECK_NE(tab_fullscreen_accepted_, fullscreen);
+
+  if (mouse_lock) {
+    DCHECK_EQ(mouse_lock_state_, MOUSELOCK_REQUESTED);
+    mouse_lock_state_ = MOUSELOCK_NOT_REQUESTED;
+    fullscreened_tab_->tab_contents()->GotResponseToLockMouseRequest(false);
+    if (!fullscreen)
+      UpdateFullscreenExitBubbleContent();
+  }
+
+  if (fullscreen)
+    ExitTabbedFullscreenModeIfNecessary();
+}
+
+void FullscreenController::WindowFullscreenStateChanged() {
+  MessageLoop::current()->PostTask(FROM_HERE,
+      base::Bind(&FullscreenController::NotifyFullscreenChange, this));
+  bool notify_tab_of_exit;
+#if defined(OS_MACOSX)
+  notify_tab_of_exit = !window_->InPresentationMode();
+#else
+  notify_tab_of_exit = !window_->IsFullscreen();
+#endif
+  if (notify_tab_of_exit)
+    NotifyTabOfFullscreenExitIfNecessary();
+}
+
+bool FullscreenController::HandleUserPressedEscape() {
+  if (!IsFullscreenForTab())
+    return false;
+  ExitTabbedFullscreenModeIfNecessary();
+  return true;
+}
+
+void FullscreenController::NotifyTabOfFullscreenExitIfNecessary() {
+  if (fullscreened_tab_)
+    fullscreened_tab_->ExitFullscreenMode();
+  else
+    DCHECK_EQ(mouse_lock_state_, MOUSELOCK_NOT_REQUESTED);
+
+  fullscreened_tab_ = NULL;
+  tab_caused_fullscreen_ = false;
+  tab_fullscreen_accepted_ = false;
+  mouse_lock_state_ = MOUSELOCK_NOT_REQUESTED;
+
+  UpdateFullscreenExitBubbleContent();
+}
+
+void FullscreenController::ExitTabbedFullscreenModeIfNecessary() {
+  if (tab_caused_fullscreen_)
+    ToggleFullscreenMode(false);
+  else
+    NotifyTabOfFullscreenExitIfNecessary();
+}
+
+void FullscreenController::UpdateFullscreenExitBubbleContent() {
+  GURL url;
+  if (fullscreened_tab_)
+    url = fullscreened_tab_->tab_contents()->GetURL();
+
+  window_->UpdateFullscreenExitBubbleContent(url,
+                                             GetFullscreenExitBubbleType());
+}
+
+void FullscreenController::NotifyFullscreenChange() {
+  content::NotificationService::current()->Notify(
+      chrome::NOTIFICATION_FULLSCREEN_CHANGED,
+      content::Source<FullscreenController>(this),
+      content::NotificationService::NoDetails());
+}
+
+FullscreenExitBubbleType
+    FullscreenController::GetFullscreenExitBubbleType() const {
+  if (!fullscreened_tab_) {
+    DCHECK_EQ(MOUSELOCK_NOT_REQUESTED, mouse_lock_state_);
+    return FEB_TYPE_BROWSER_FULLSCREEN_EXIT_INSTRUCTION;
+  }
+  if (fullscreened_tab_ && !tab_fullscreen_accepted_) {
+    DCHECK_NE(MOUSELOCK_NOT_REQUESTED, mouse_lock_state_);
+    return mouse_lock_state_ == MOUSELOCK_REQUESTED ?
+        FEB_TYPE_FULLSCREEN_MOUSELOCK_BUTTONS : FEB_TYPE_FULLSCREEN_BUTTONS;
+  }
+  if (mouse_lock_state_ == MOUSELOCK_REQUESTED)
+    return FEB_TYPE_MOUSELOCK_BUTTONS;
+  return mouse_lock_state_ == MOUSELOCK_ACCEPTED ?
+      FEB_TYPE_FULLSCREEN_MOUSELOCK_EXIT_INSTRUCTION :
+      FEB_TYPE_FULLSCREEN_EXIT_INSTRUCTION;
+}
+
+ContentSetting
+    FullscreenController::GetFullscreenSetting(const GURL& url) const {
+  if (url.SchemeIsFile())
+    return CONTENT_SETTING_ALLOW;
+
+  return profile_->GetHostContentSettingsMap()->GetContentSetting(url, url,
+      CONTENT_SETTINGS_TYPE_FULLSCREEN, std::string());
+
+}
+
+ContentSetting
+    FullscreenController::GetMouseLockSetting(const GURL& url) const {
+  if (url.SchemeIsFile())
+    return CONTENT_SETTING_ALLOW;
+
+  HostContentSettingsMap* settings_map = profile_->GetHostContentSettingsMap();
+  return settings_map->GetContentSetting(url, url,
+      CONTENT_SETTINGS_TYPE_MOUSELOCK, std::string());
+}