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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/download/download_service.h"
      6 
      7 #include "base/callback.h"
      8 #include "chrome/browser/browser_process.h"
      9 #include "chrome/browser/download/chrome_download_manager_delegate.h"
     10 #include "chrome/browser/download/download_history.h"
     11 #include "chrome/browser/download/download_service_factory.h"
     12 #include "chrome/browser/download/download_status_updater.h"
     13 #include "chrome/browser/download/download_ui_controller.h"
     14 #include "chrome/browser/extensions/api/downloads/downloads_api.h"
     15 #include "chrome/browser/history/history_service.h"
     16 #include "chrome/browser/history/history_service_factory.h"
     17 #include "chrome/browser/net/chrome_net_log.h"
     18 #include "chrome/browser/profiles/profile.h"
     19 #include "chrome/browser/profiles/profile_manager.h"
     20 #include "content/public/browser/download_manager.h"
     21 
     22 using content::BrowserContext;
     23 using content::DownloadManager;
     24 using content::DownloadManagerDelegate;
     25 
     26 DownloadService::DownloadService(Profile* profile)
     27     : download_manager_created_(false),
     28       profile_(profile) {
     29 }
     30 
     31 DownloadService::~DownloadService() {}
     32 
     33 ChromeDownloadManagerDelegate* DownloadService::GetDownloadManagerDelegate() {
     34   DownloadManager* manager = BrowserContext::GetDownloadManager(profile_);
     35   // If we've already created the delegate, just return it.
     36   if (download_manager_created_) {
     37     DCHECK(static_cast<DownloadManagerDelegate*>(manager_delegate_.get()) ==
     38            manager->GetDelegate());
     39     return manager_delegate_.get();
     40   }
     41   download_manager_created_ = true;
     42 
     43   // In case the delegate has already been set by
     44   // SetDownloadManagerDelegateForTesting.
     45   if (!manager_delegate_.get())
     46     manager_delegate_ = new ChromeDownloadManagerDelegate(profile_);
     47 
     48   manager_delegate_->SetDownloadManager(manager);
     49 
     50 #if !defined(OS_ANDROID)
     51   extension_event_router_.reset(new ExtensionDownloadsEventRouter(
     52       profile_, manager));
     53 #endif
     54 
     55   if (!profile_->IsOffTheRecord()) {
     56     HistoryService* history = HistoryServiceFactory::GetForProfile(
     57         profile_, Profile::EXPLICIT_ACCESS);
     58     history->GetNextDownloadId(base::Bind(
     59         &ChromeDownloadManagerDelegate::SetNextId, manager_delegate_));
     60     download_history_.reset(new DownloadHistory(
     61         manager,
     62         scoped_ptr<DownloadHistory::HistoryAdapter>(
     63             new DownloadHistory::HistoryAdapter(history))));
     64   }
     65 
     66   // Pass an empty delegate when constructing the DownloadUIController. The
     67   // default delegate does all the notifications we need.
     68   scoped_ptr<DownloadUIController::Delegate> empty_ui_delegate;
     69   download_ui_.reset(new DownloadUIController(manager,
     70                                               empty_ui_delegate.Pass()));
     71 
     72   // Include this download manager in the set monitored by the
     73   // global status updater.
     74   g_browser_process->download_status_updater()->AddManager(manager);
     75 
     76   return manager_delegate_.get();
     77 }
     78 
     79 DownloadHistory* DownloadService::GetDownloadHistory() {
     80   if (!download_manager_created_) {
     81     GetDownloadManagerDelegate();
     82   }
     83   DCHECK(download_manager_created_);
     84   return download_history_.get();
     85 }
     86 
     87 bool DownloadService::HasCreatedDownloadManager() {
     88   return download_manager_created_;
     89 }
     90 
     91 int DownloadService::DownloadCount() const {
     92   if (!download_manager_created_)
     93     return 0;
     94   return BrowserContext::GetDownloadManager(profile_)->InProgressCount();
     95 }
     96 
     97 // static
     98 int DownloadService::DownloadCountAllProfiles() {
     99   std::vector<Profile*> profiles(
    100       g_browser_process->profile_manager()->GetLoadedProfiles());
    101 
    102   int count = 0;
    103   for (std::vector<Profile*>::iterator it = profiles.begin();
    104        it < profiles.end(); ++it) {
    105     count += DownloadServiceFactory::GetForBrowserContext(*it)->DownloadCount();
    106     if ((*it)->HasOffTheRecordProfile())
    107       count += DownloadServiceFactory::GetForBrowserContext(
    108           (*it)->GetOffTheRecordProfile())->DownloadCount();
    109   }
    110 
    111   return count;
    112 }
    113 
    114 void DownloadService::SetDownloadManagerDelegateForTesting(
    115     ChromeDownloadManagerDelegate* new_delegate) {
    116   // Set the new delegate first so that if BrowserContext::GetDownloadManager()
    117   // causes a new download manager to be created, we won't create a redundant
    118   // ChromeDownloadManagerDelegate().
    119   manager_delegate_ = new_delegate;
    120   // Guarantee everything is properly initialized.
    121   DownloadManager* dm = BrowserContext::GetDownloadManager(profile_);
    122   if (dm->GetDelegate() != new_delegate) {
    123     dm->SetDelegate(new_delegate);
    124     new_delegate->SetDownloadManager(dm);
    125   }
    126 }
    127 
    128 bool DownloadService::IsShelfEnabled() {
    129 #if defined(OS_ANDROID)
    130   return true;
    131 #else
    132   return !extension_event_router_ ||
    133          extension_event_router_->IsShelfEnabled();
    134 #endif
    135 }
    136 
    137 void DownloadService::Shutdown() {
    138   if (download_manager_created_) {
    139     // Normally the DownloadManager would be shutdown later, after the Profile
    140     // goes away and BrowserContext's destructor runs. But that would be too
    141     // late for us since we need to use the profile (indirectly through history
    142     // code) when the DownloadManager is shutting down. So we shut it down
    143     // manually earlier. See http://crbug.com/131692
    144     BrowserContext::GetDownloadManager(profile_)->Shutdown();
    145   }
    146 #if !defined(OS_ANDROID)
    147   extension_event_router_.reset();
    148 #endif
    149   manager_delegate_ = NULL;
    150   download_history_.reset();
    151 }
    152