chrome/browser/ui/exclusive_access/exclusive_access_controller_base.cc

   1 // Copyright (c) 2015 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/exclusive_access/exclusive_access_controller_base.h"
   6
   7 #include "chrome/browser/chrome_notification_types.h"
   8 #include "chrome/browser/profiles/profile.h"
   9 #include "chrome/browser/ui/exclusive_access/exclusive_access_manager.h"
  10 #include "content/public/browser/navigation_details.h"
  11 #include "content/public/browser/navigation_entry.h"
  12 #include "content/public/browser/notification_service.h"
  13 #include "content/public/browser/web_contents.h"
  14
  15 using content::WebContents;
  16
  17 ExclusiveAccessControllerBase::ExclusiveAccessControllerBase(
  18     ExclusiveAccessManager* manager)
  19     : manager_(manager), tab_with_exclusive_access_(nullptr) {
  20 }
  21
  22 ExclusiveAccessControllerBase::~ExclusiveAccessControllerBase() {
  23 }
  24
  25 GURL ExclusiveAccessControllerBase::GetExclusiveAccessBubbleURL() const {
  26   return manager_->GetExclusiveAccessBubbleURL();
  27 }
  28
  29 GURL ExclusiveAccessControllerBase::GetURLForExclusiveAccessBubble() const {
  30   if (tab_with_exclusive_access_)
  31     return tab_with_exclusive_access_->GetURL();
  32   return GURL();
  33 }
  34
  35 void ExclusiveAccessControllerBase::OnTabDeactivated(
  36     WebContents* web_contents) {
  37   if (web_contents == tab_with_exclusive_access_)
  38     ExitExclusiveAccessIfNecessary();
  39 }
  40
  41 void ExclusiveAccessControllerBase::OnTabDetachedFromView(
  42     WebContents* old_contents) {
  43   // Derived class will have to implement if necessary.
  44 }
  45
  46 void ExclusiveAccessControllerBase::OnTabClosing(WebContents* web_contents) {
  47   if (web_contents == tab_with_exclusive_access_) {
  48     ExitExclusiveAccessIfNecessary();
  49
  50     // The call to exit exclusive access may result in asynchronous notification
  51     // of state change (e.g. fullscreen change on Linux). We don't want to rely
  52     // on it to call NotifyTabExclusiveAccessLost(), because at that point
  53     // |tab_with_exclusive_access_| may not be valid. Instead, we call it here
  54     // to clean up exclusive access tab related state.
  55     NotifyTabExclusiveAccessLost();
  56   }
  57 }
  58
  59 void ExclusiveAccessControllerBase::Observe(
  60     int type,
  61     const content::NotificationSource& source,
  62     const content::NotificationDetails& details) {
  63   DCHECK_EQ(content::NOTIFICATION_NAV_ENTRY_COMMITTED, type);
  64   if (content::Details<content::LoadCommittedDetails>(details)
  65           ->is_navigation_to_different_page())
  66     ExitExclusiveAccessIfNecessary();
  67 }
  68
  69 void ExclusiveAccessControllerBase::SetTabWithExclusiveAccess(
  70     WebContents* tab) {
  71   // Tab should never be replaced with another tab, or
  72   // UpdateNotificationRegistrations would need updating.
  73   DCHECK(tab_with_exclusive_access_ == tab ||
  74          tab_with_exclusive_access_ == nullptr || tab == nullptr);
  75   tab_with_exclusive_access_ = tab;
  76   UpdateNotificationRegistrations();
  77 }
  78
  79 void ExclusiveAccessControllerBase::UpdateNotificationRegistrations() {
  80   if (tab_with_exclusive_access_ && registrar_.IsEmpty()) {
  81     registrar_.Add(this, content::NOTIFICATION_NAV_ENTRY_COMMITTED,
  82                    content::Source<content::NavigationController>(
  83                        &tab_with_exclusive_access_->GetController()));
  84   } else if (!tab_with_exclusive_access_ && !registrar_.IsEmpty()) {
  85     registrar_.RemoveAll();
  86   }
  87 }