chrome/browser/ui/webui/app_launcher_page_ui.cc

   1 // Copyright (c) 2013 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/webui/app_launcher_page_ui.h"
   6
   7 #include "base/memory/ref_counted_memory.h"
   8 #include "base/metrics/histogram.h"
   9 #include "chrome/browser/profiles/profile.h"
  10 #include "chrome/browser/ui/webui/metrics_handler.h"
  11 #include "chrome/browser/ui/webui/ntp/app_launcher_handler.h"
  12 #include "chrome/browser/ui/webui/ntp/app_resource_cache_factory.h"
  13 #include "chrome/browser/ui/webui/ntp/core_app_launcher_handler.h"
  14 #include "chrome/browser/ui/webui/ntp/favicon_webui_handler.h"
  15 #include "chrome/browser/ui/webui/ntp/ntp_login_handler.h"
  16 #include "chrome/browser/ui/webui/ntp/ntp_resource_cache.h"
  17 #include "chrome/common/url_constants.h"
  18 #include "chrome/grit/generated_resources.h"
  19 #include "content/public/browser/browser_thread.h"
  20 #include "content/public/browser/render_process_host.h"
  21 #include "content/public/browser/web_ui.h"
  22 #include "extensions/browser/extension_system.h"
  23 #include "grit/theme_resources.h"
  24 #include "ui/base/l10n/l10n_util.h"
  25 #include "ui/base/resource/resource_bundle.h"
  26
  27 #if defined(ENABLE_THEMES)
  28 #include "chrome/browser/ui/webui/theme_handler.h"
  29 #endif
  30
  31 class ExtensionService;
  32
  33 using content::BrowserThread;
  34
  35 ///////////////////////////////////////////////////////////////////////////////
  36 // AppLauncherPageUI
  37
  38 AppLauncherPageUI::AppLauncherPageUI(content::WebUI* web_ui)
  39     : content::WebUIController(web_ui) {
  40   web_ui->OverrideTitle(l10n_util::GetStringUTF16(IDS_APP_LAUNCHER_TAB_TITLE));
  41
  42   if (NTPLoginHandler::ShouldShow(GetProfile()))
  43     web_ui->AddMessageHandler(new NTPLoginHandler());
  44
  45   if (!GetProfile()->IsOffTheRecord()) {
  46     ExtensionService* service =
  47         extensions::ExtensionSystem::Get(GetProfile())->extension_service();
  48     // We should not be launched without an ExtensionService.
  49     DCHECK(service);
  50     web_ui->AddMessageHandler(new AppLauncherHandler(service));
  51     web_ui->AddMessageHandler(new CoreAppLauncherHandler());
  52     web_ui->AddMessageHandler(new FaviconWebUIHandler());
  53     web_ui->AddMessageHandler(new MetricsHandler());
  54   }
  55
  56 #if defined(ENABLE_THEMES)
  57   // The theme handler can require some CPU, so do it after hooking up the most
  58   // visited handler. This allows the DB query for the new tab thumbs to happen
  59   // earlier.
  60   web_ui->AddMessageHandler(new ThemeHandler());
  61 #endif
  62
  63   scoped_ptr<HTMLSource> html_source(
  64       new HTMLSource(GetProfile()->GetOriginalProfile()));
  65   content::URLDataSource::Add(GetProfile(), html_source.release());
  66 }
  67
  68 AppLauncherPageUI::~AppLauncherPageUI() {
  69 }
  70
  71 // static
  72 base::RefCountedMemory* AppLauncherPageUI::GetFaviconResourceBytes(
  73     ui::ScaleFactor scale_factor) {
  74   return ui::ResourceBundle::GetSharedInstance().
  75       LoadDataResourceBytesForScale(IDR_BOOKMARK_BAR_APPS_SHORTCUT,
  76                                     scale_factor);
  77 }
  78
  79 Profile* AppLauncherPageUI::GetProfile() const {
  80   return Profile::FromWebUI(web_ui());
  81 }
  82
  83 ///////////////////////////////////////////////////////////////////////////////
  84 // HTMLSource
  85
  86 AppLauncherPageUI::HTMLSource::HTMLSource(Profile* profile)
  87     : profile_(profile) {
  88 }
  89
  90 std::string AppLauncherPageUI::HTMLSource::GetSource() const {
  91   return chrome::kChromeUIAppLauncherPageHost;
  92 }
  93
  94 void AppLauncherPageUI::HTMLSource::StartDataRequest(
  95     const std::string& path,
  96     int render_process_id,
  97     int render_frame_id,
  98     const content::URLDataSource::GotDataCallback& callback) {
  99   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 100
 101   NTPResourceCache* resource = AppResourceCacheFactory::GetForProfile(profile_);
 102   resource->set_should_show_most_visited_page(false);
 103   resource->set_should_show_other_devices_menu(false);
 104   resource->set_should_show_recently_closed_menu(false);
 105
 106   content::RenderProcessHost* render_host =
 107       content::RenderProcessHost::FromID(render_process_id);
 108   NTPResourceCache::WindowType win_type = NTPResourceCache::GetWindowType(
 109       profile_, render_host);
 110   scoped_refptr<base::RefCountedMemory> html_bytes(
 111       resource->GetNewTabHTML(win_type));
 112
 113   callback.Run(html_bytes.get());
 114 }
 115
 116 std::string AppLauncherPageUI::HTMLSource::GetMimeType(
 117     const std::string& resource) const {
 118   return "text/html";
 119 }
 120
 121 bool AppLauncherPageUI::HTMLSource::ShouldReplaceExistingSource() const {
 122   return false;
 123 }
 124
 125 bool AppLauncherPageUI::HTMLSource::ShouldAddContentSecurityPolicy() const {
 126   return false;
 127 }
 128
 129 AppLauncherPageUI::HTMLSource::~HTMLSource() {}