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      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/startup/default_browser_prompt.h"
      6 
      7 #include "base/prefs/pref_service.h"
      8 #include "chrome/browser/profiles/profile.h"
      9 #include "chrome/browser/shell_integration.h"
     10 #include "chrome/browser/ui/browser.h"
     11 #include "chrome/browser/ui/browser_finder.h"
     12 #include "chrome/browser/ui/webui/set_as_default_browser_ui.h"
     13 #include "chrome/common/pref_names.h"
     14 #include "components/startup_metric_utils/startup_metric_utils.h"
     15 #include "content/public/browser/browser_thread.h"
     16 #include "content/public/browser/notification_service.h"
     17 #include "content/public/browser/notification_types.h"
     18 
     19 using content::BrowserThread;
     20 
     21 namespace {
     22 
     23 // Show the page prompting the user to make Chrome the default browser on
     24 // Windows 8 (which means becoming "the browser" in Metro mode). The page
     25 // will be shown at the first appropriate opportunity. It can be placed in
     26 // a tab or in a dialog, depending on other settings.
     27 class SetMetroBrowserFlowLauncher : public content::NotificationObserver {
     28  public:
     29   static void LaunchSoon(Profile* profile) {
     30     // The instance will manage its own lifetime.
     31     new SetMetroBrowserFlowLauncher(profile);
     32   }
     33 
     34  private:
     35   explicit SetMetroBrowserFlowLauncher(Profile* profile)
     36       : profile_(profile) {
     37     registrar_.Add(this, content::NOTIFICATION_LOAD_COMPLETED_MAIN_FRAME,
     38                    content::NotificationService::AllSources());
     39   }
     40 
     41   // content::NotificationObserver override:
     42   virtual void Observe(int type,
     43                        const content::NotificationSource& source,
     44                        const content::NotificationDetails& details) OVERRIDE;
     45 
     46   content::NotificationRegistrar registrar_;
     47   Profile* profile_;
     48 
     49   DISALLOW_COPY_AND_ASSIGN(SetMetroBrowserFlowLauncher);
     50 };
     51 
     52 void SetMetroBrowserFlowLauncher::Observe(
     53     int type,
     54     const content::NotificationSource& source,
     55     const content::NotificationDetails& details) {
     56   DCHECK_EQ(type, content::NOTIFICATION_LOAD_COMPLETED_MAIN_FRAME);
     57   Browser* browser = chrome::FindBrowserWithWebContents(
     58       content::Source<content::WebContents>(source).ptr());
     59 
     60   if (!browser || !browser->is_type_tabbed())
     61     return;
     62 
     63   // Unregister and delete.
     64   registrar_.RemoveAll();
     65   SetAsDefaultBrowserUI::Show(profile_, browser);
     66   delete this;
     67 }
     68 
     69 }  // namespace
     70 
     71 namespace chrome {
     72 
     73 bool ShowFirstRunDefaultBrowserPrompt(Profile* profile) {
     74   // If the only available mode of setting the default browser requires
     75   // user interaction, it means this couldn't have been done yet. Therefore,
     76   // we launch the dialog and inform the caller of it.
     77   bool show_status =
     78       (ShellIntegration::CanSetAsDefaultBrowser() ==
     79        ShellIntegration::SET_DEFAULT_INTERACTIVE) &&
     80       (ShellIntegration::GetDefaultBrowser() == ShellIntegration::NOT_DEFAULT);
     81 
     82   if (show_status) {
     83     startup_metric_utils::SetNonBrowserUIDisplayed();
     84     SetMetroBrowserFlowLauncher::LaunchSoon(profile);
     85   }
     86 
     87   return show_status;
     88 }
     89 
     90 }  // namespace chrome
     91