Create CoreTabHelper, move remaining core TCW functionality into it.

chrome/browser/ui/tab_contents/tab_contents_wrapper.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/tab_contents/tab_contents_wrapper.h"
 
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
 #include "chrome/browser/autocomplete_history_manager.h"
 #include "chrome/browser/autofill/autofill_external_delegate.h"
 #include "chrome/browser/autofill/autofill_manager.h"
 #include "chrome/browser/automation/automation_tab_helper.h"
-#include "chrome/browser/browser_process.h"
 #include "chrome/browser/content_settings/tab_specific_content_settings.h"
 #include "chrome/browser/download/download_request_limiter_observer.h"
 #include "chrome/browser/extensions/extension_tab_helper.h"
 #include "chrome/browser/extensions/extension_webnavigation_api.h"
 #include "chrome/browser/external_protocol/external_protocol_observer.h"
 #include "chrome/browser/favicon/favicon_tab_helper.h"
-#include "chrome/browser/google/google_util.h"
 #include "chrome/browser/history/history_tab_helper.h"
 #include "chrome/browser/infobars/infobar_tab_helper.h"
 #include "chrome/browser/omnibox_search_hint.h"
 #include "chrome/browser/password_manager/password_manager.h"
 #include "chrome/browser/password_manager_delegate_impl.h"
-#include "chrome/browser/pdf_unsupported_feature.h"
 #include "chrome/browser/plugin_observer.h"
-#include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/prerender/prerender_tab_helper.h"
 #include "chrome/browser/printing/print_preview_message_handler.h"
 #include "chrome/browser/printing/print_view_manager.h"
-#include "chrome/browser/profiles/profile.h"
-#include "chrome/browser/renderer_host/web_cache_manager.h"
+#include "chrome/browser/safe_browsing/safe_browsing_tab_observer.h"
 #include "chrome/browser/sessions/restore_tab_helper.h"
-#include "chrome/browser/safe_browsing/client_side_detection_host.h"
 #include "chrome/browser/tab_contents/tab_contents_ssl_helper.h"
 #include "chrome/browser/tab_contents/thumbnail_generator.h"
 #include "chrome/browser/translate/translate_tab_helper.h"
+#include "chrome/browser/ui/alternate_error_tab_observer.h"
 #include "chrome/browser/ui/blocked_content/blocked_content_tab_helper.h"
 #include "chrome/browser/ui/bookmarks/bookmark_tab_helper.h"
 #include "chrome/browser/ui/constrained_window_tab_helper.h"
 #include "chrome/browser/ui/find_bar/find_tab_helper.h"
 #include "chrome/browser/ui/intents/web_intent_picker_factory_impl.h"
 #include "chrome/browser/ui/intents/web_intent_picker_controller.h"
+#include "chrome/browser/ui/pdf/pdf_tab_observer.h"
 #include "chrome/browser/ui/prefs/prefs_tab_helper.h"
 #include "chrome/browser/ui/sad_tab_observer.h"
 #include "chrome/browser/ui/search_engines/search_engine_tab_helper.h"
+#include "chrome/browser/ui/snapshot_tab_helper.h"
 #include "chrome/browser/ui/sync/tab_contents_wrapper_synced_tab_delegate.h"
-#include "chrome/common/chrome_notification_types.h"
+#include "chrome/browser/ui/tab_contents/core_tab_helper.h"
 #include "chrome/common/chrome_switches.h"
-#include "chrome/common/pref_names.h"
-#include "chrome/common/render_messages.h"
-#include "content/browser/renderer_host/render_view_host.h"
-#include "content/public/browser/notification_details.h"
-#include "content/public/browser/notification_service.h"
-#include "grit/generated_resources.h"
-#include "grit/locale_settings.h"
-#include "grit/platform_locale_settings.h"
-#include "ui/base/l10n/l10n_util.h"
 
 namespace {
 
 static base::LazyInstance<base::PropertyAccessor<TabContentsWrapper*> >
     g_tab_contents_wrapper_property_accessor = LAZY_INSTANCE_INITIALIZER;
 
-// The list of prefs we want to observe.
-const char* kPrefsToObserve[] = {
-  prefs::kAlternateErrorPagesEnabled,
-  prefs::kDefaultZoomLevel,
-#if defined (ENABLE_SAFE_BROWSING)
-  prefs::kSafeBrowsingEnabled,
-#endif
-};
-
-const int kPrefsToObserveLength = arraysize(kPrefsToObserve);
-
 }  // namespace
 
 ////////////////////////////////////////////////////////////////////////////////
 // TabContentsWrapper, public:
 
 TabContentsWrapper::TabContentsWrapper(TabContents* contents)
     : TabContentsObserver(contents),
-      delegate_(NULL),
       in_destructor_(false),
       tab_contents_(contents) {
   DCHECK(contents);
   DCHECK(!GetCurrentWrapperForContents(contents));
+
   // Stash this in the property bag so it can be retrieved without having to
   // go to a Browser.
   property_accessor()->SetProperty(contents->property_bag(), this);
 
-  PrefService* prefs = profile()->GetPrefs();
-  pref_change_registrar_.Init(prefs);
-  if (prefs) {
-    for (int i = 0; i < kPrefsToObserveLength; ++i)
-      pref_change_registrar_.Add(kPrefsToObserve[i], this);
-  }
-
   // Create the tab helpers.
   autocomplete_history_manager_.reset(new AutocompleteHistoryManager(contents));
   autofill_manager_ = new AutofillManager(this);
   if (CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kExternalAutofillPopup)) {
     autofill_external_delegate_.reset(
         AutofillExternalDelegate::Create(this, autofill_manager_.get()));
     autofill_manager_->SetExternalDelegate(autofill_external_delegate_.get());
     autocomplete_history_manager_->SetExternalDelegate(
         autofill_external_delegate_.get());
   }
   automation_tab_helper_.reset(new AutomationTabHelper(contents));
   blocked_content_tab_helper_.reset(new BlockedContentTabHelper(this));
   bookmark_tab_helper_.reset(new BookmarkTabHelper(this));
   constrained_window_tab_helper_.reset(new ConstrainedWindowTabHelper(this));
+  core_tab_helper_.reset(new CoreTabHelper(this));
   extension_tab_helper_.reset(new ExtensionTabHelper(this));
   favicon_tab_helper_.reset(new FaviconTabHelper(contents));
   find_tab_helper_.reset(new FindTabHelper(contents));
   history_tab_helper_.reset(new HistoryTabHelper(contents));
   infobar_tab_helper_.reset(new InfoBarTabHelper(contents));
   password_manager_delegate_.reset(new PasswordManagerDelegateImpl(this));
   password_manager_.reset(
       new PasswordManager(contents, password_manager_delegate_.get()));
   prefs_tab_helper_.reset(new PrefsTabHelper(this));
   prerender_tab_helper_.reset(new prerender::PrerenderTabHelper(this));
   print_view_manager_.reset(new printing::PrintViewManager(this));
   restore_tab_helper_.reset(new RestoreTabHelper(this));
-#if defined(ENABLE_SAFE_BROWSING)
-  if (profile()->GetPrefs()->GetBoolean(prefs::kSafeBrowsingEnabled) &&
-      g_browser_process->safe_browsing_detection_service()) {
-    safebrowsing_detection_host_.reset(
-        safe_browsing::ClientSideDetectionHost::Create(contents));
-  }
-#endif
   search_engine_tab_helper_.reset(new SearchEngineTabHelper(contents));
+  snapshot_tab_helper_.reset(new SnapshotTabHelper(this));
   ssl_helper_.reset(new TabContentsSSLHelper(this));
   synced_tab_delegate_.reset(new TabContentsWrapperSyncedTabDelegate(this));
   content_settings_.reset(new TabSpecificContentSettings(contents));
   translate_tab_helper_.reset(new TranslateTabHelper(contents));
   web_intent_picker_controller_.reset(new WebIntentPickerController(
       this, new WebIntentPickerFactoryImpl()));
 
   // Create the per-tab observers.
+  alternate_error_page_tab_observer_.reset(
+      new AlternateErrorPageTabObserver(this));
   download_request_limiter_observer_.reset(
       new DownloadRequestLimiterObserver(contents));
   webnavigation_observer_.reset(
       new ExtensionWebNavigationTabObserver(contents));
   external_protocol_observer_.reset(new ExternalProtocolObserver(contents));
+  if (OmniboxSearchHint::IsEnabled(profile()))
+    omnibox_search_hint_.reset(new OmniboxSearchHint(this));
+  pdf_tab_observer_.reset(new PDFTabObserver(this));
   plugin_observer_.reset(new PluginObserver(this));
   print_preview_.reset(new printing::PrintPreviewMessageHandler(contents));
   sad_tab_observer_.reset(new SadTabObserver(contents));
+  safe_browsing_tab_observer_.reset(
+      new safe_browsing::SafeBrowsingTabObserver(this));
+
   // Start the in-browser thumbnailing if the feature is enabled.
   if (switches::IsInBrowserThumbnailingEnabled()) {
     thumbnail_generation_observer_.reset(new ThumbnailGenerator);
     thumbnail_generation_observer_->StartThumbnailing(tab_contents_.get());
   }
-
-  // Set-up the showing of the omnibox search infobar if applicable.
-  if (OmniboxSearchHint::IsEnabled(profile()))
-    omnibox_search_hint_.reset(new OmniboxSearchHint(this));
-
-  registrar_.Add(this, chrome::NOTIFICATION_GOOGLE_URL_UPDATED,
-                 content::NotificationService::AllSources());
 }
 
 TabContentsWrapper::~TabContentsWrapper() {
   in_destructor_ = true;
 
   // Need to tear down infobars before the TabContents goes away.
+  // TODO(avi): Can we get this handled by the tab helper itself?
   infobar_tab_helper_.reset();
 }
 
 base::PropertyAccessor<TabContentsWrapper*>*
     TabContentsWrapper::property_accessor() {
   return g_tab_contents_wrapper_property_accessor.Pointer();
 }
 
-void TabContentsWrapper::RegisterUserPrefs(PrefService* prefs) {
-  prefs->RegisterBooleanPref(prefs::kAlternateErrorPagesEnabled,
-                             true,
-                             PrefService::SYNCABLE_PREF);
-}
-
-string16 TabContentsWrapper::GetDefaultTitle() {
-  return l10n_util::GetStringUTF16(IDS_DEFAULT_TAB_TITLE);
-}
-
-string16 TabContentsWrapper::GetStatusText() const {
-  if (!tab_contents()->IsLoading() ||
-      tab_contents()->load_state().state == net::LOAD_STATE_IDLE) {
-    return string16();
-  }
-
-  switch (tab_contents()->load_state().state) {
-    case net::LOAD_STATE_WAITING_FOR_DELEGATE:
-      return l10n_util::GetStringFUTF16(IDS_LOAD_STATE_WAITING_FOR_DELEGATE,
-                                        tab_contents()->load_state().param);
-    case net::LOAD_STATE_WAITING_FOR_CACHE:
-      return l10n_util::GetStringUTF16(IDS_LOAD_STATE_WAITING_FOR_CACHE);
-    case net::LOAD_STATE_WAITING_FOR_APPCACHE:
-      return l10n_util::GetStringUTF16(IDS_LOAD_STATE_WAITING_FOR_APPCACHE);
-    case net::LOAD_STATE_ESTABLISHING_PROXY_TUNNEL:
-      return
-          l10n_util::GetStringUTF16(IDS_LOAD_STATE_ESTABLISHING_PROXY_TUNNEL);
-    case net::LOAD_STATE_RESOLVING_PROXY_FOR_URL:
-      return l10n_util::GetStringUTF16(IDS_LOAD_STATE_RESOLVING_PROXY_FOR_URL);
-    case net::LOAD_STATE_RESOLVING_HOST_IN_PROXY_SCRIPT:
-      return l10n_util::GetStringUTF16(
-          IDS_LOAD_STATE_RESOLVING_HOST_IN_PROXY_SCRIPT);
-    case net::LOAD_STATE_RESOLVING_HOST:
-      return l10n_util::GetStringUTF16(IDS_LOAD_STATE_RESOLVING_HOST);
-    case net::LOAD_STATE_CONNECTING:
-      return l10n_util::GetStringUTF16(IDS_LOAD_STATE_CONNECTING);
-    case net::LOAD_STATE_SSL_HANDSHAKE:
-      return l10n_util::GetStringUTF16(IDS_LOAD_STATE_SSL_HANDSHAKE);
-    case net::LOAD_STATE_SENDING_REQUEST:
-      if (tab_contents()->upload_size())
-        return l10n_util::GetStringFUTF16Int(
-                    IDS_LOAD_STATE_SENDING_REQUEST_WITH_PROGRESS,
-                    static_cast<int>((100 * tab_contents()->upload_position()) /
-                        tab_contents()->upload_size()));
-      else
-        return l10n_util::GetStringUTF16(IDS_LOAD_STATE_SENDING_REQUEST);
-    case net::LOAD_STATE_WAITING_FOR_RESPONSE:
-      return l10n_util::GetStringFUTF16(IDS_LOAD_STATE_WAITING_FOR_RESPONSE,
-                                        tab_contents()->load_state_host());
-    // Ignore net::LOAD_STATE_READING_RESPONSE and net::LOAD_STATE_IDLE
-    case net::LOAD_STATE_IDLE:
-    case net::LOAD_STATE_READING_RESPONSE:
-      break;
-  }
-
-  return string16();
-}
-
 TabContentsWrapper* TabContentsWrapper::Clone() {
   TabContents* new_contents = tab_contents()->Clone();
   TabContentsWrapper* new_wrapper = new TabContentsWrapper(new_contents);
 
+  // TODO(avi): Can we generalize this so that knowledge of the functionings of
+  // the tab helpers isn't required here?
   new_wrapper->extension_tab_helper()->CopyStateFrom(
       *extension_tab_helper_.get());
   return new_wrapper;
 }
 
-void TabContentsWrapper::CaptureSnapshot() {
-  Send(new ChromeViewMsg_CaptureSnapshot(routing_id()));
-}
-
 // static
 TabContentsWrapper* TabContentsWrapper::GetCurrentWrapperForContents(
     TabContents* contents) {
   TabContentsWrapper** wrapper =
       property_accessor()->GetProperty(contents->property_bag());
 
   return wrapper ? *wrapper : NULL;
 }
 
 // static
 const TabContentsWrapper* TabContentsWrapper::GetCurrentWrapperForContents(
     const TabContents* contents) {
   TabContentsWrapper* const* wrapper =
       property_accessor()->GetProperty(contents->property_bag());
 
   return wrapper ? *wrapper : NULL;
 }
 
 Profile* TabContentsWrapper::profile() const {
   return Profile::FromBrowserContext(tab_contents()->browser_context());
 }
 
 ////////////////////////////////////////////////////////////////////////////////
-// TabContentsWrapper implementation:
-
-void TabContentsWrapper::RenderViewCreated(RenderViewHost* render_view_host) {
-  UpdateAlternateErrorPageURL(render_view_host);
-}
-
-void TabContentsWrapper::DidBecomeSelected() {
-  WebCacheManager::GetInstance()->ObserveActivity(
-      tab_contents()->GetRenderProcessHost()->GetID());
-}
-
-bool TabContentsWrapper::OnMessageReceived(const IPC::Message& message) {
-  bool handled = true;
-  IPC_BEGIN_MESSAGE_MAP(TabContentsWrapper, message)
-    IPC_MESSAGE_HANDLER(ChromeViewHostMsg_Snapshot, OnSnapshot)
-    IPC_MESSAGE_HANDLER(ChromeViewHostMsg_PDFHasUnsupportedFeature,
-                        OnPDFHasUnsupportedFeature)
-    IPC_MESSAGE_UNHANDLED(handled = false)
-  IPC_END_MESSAGE_MAP()
-  return handled;
-}
+// TabContentsObserver overrides
 
 void TabContentsWrapper::TabContentsDestroyed(TabContents* tab) {
   // Destruction of the TabContents should only be done by us from our
   // destructor. Otherwise it's very likely we (or one of the helpers we own)
   // will attempt to access the TabContents and we'll crash.
   DCHECK(in_destructor_);
 }
-
-void TabContentsWrapper::Observe(int type,
-                                 const content::NotificationSource& source,
-                                 const content::NotificationDetails& details) {
-  switch (type) {
-    case chrome::NOTIFICATION_GOOGLE_URL_UPDATED:
-      UpdateAlternateErrorPageURL(render_view_host());
-      break;
-    case chrome::NOTIFICATION_PREF_CHANGED: {
-      std::string* pref_name_in = content::Details<std::string>(details).ptr();
-      DCHECK(content::Source<PrefService>(source).ptr() ==
-             profile()->GetPrefs());
-      if (*pref_name_in == prefs::kAlternateErrorPagesEnabled) {
-        UpdateAlternateErrorPageURL(render_view_host());
-      } else if (*pref_name_in == prefs::kDefaultZoomLevel) {
-        tab_contents()->render_view_host()->SetZoomLevel(
-            tab_contents()->GetZoomLevel());
-      } else if (*pref_name_in == prefs::kSafeBrowsingEnabled) {
-        UpdateSafebrowsingDetectionHost();
-      } else {
-        NOTREACHED() << "unexpected pref change notification" << *pref_name_in;
-      }
-      break;
-    }
-    default:
-      NOTREACHED();
-  }
-}
-
-////////////////////////////////////////////////////////////////////////////////
-// Internal helpers
-
-void TabContentsWrapper::OnSnapshot(const SkBitmap& bitmap) {
-  content::NotificationService::current()->Notify(
-      chrome::NOTIFICATION_TAB_SNAPSHOT_TAKEN,
-      content::Source<TabContentsWrapper>(this),
-      content::Details<const SkBitmap>(&bitmap));
-}
-
-void TabContentsWrapper::OnPDFHasUnsupportedFeature() {
-  PDFHasUnsupportedFeature(this);
-}
-
-GURL TabContentsWrapper::GetAlternateErrorPageURL() const {
-  GURL url;
-  // Disable alternate error pages when in Incognito mode.
-  if (profile()->IsOffTheRecord())
-    return url;
-
-  PrefService* prefs = profile()->GetPrefs();
-  if (prefs->GetBoolean(prefs::kAlternateErrorPagesEnabled)) {
-    url = google_util::AppendGoogleLocaleParam(
-        GURL(google_util::kLinkDoctorBaseURL));
-    url = google_util::AppendGoogleTLDParam(url);
-  }
-  return url;
-}
-
-void TabContentsWrapper::UpdateAlternateErrorPageURL(RenderViewHost* rvh) {
-  rvh->SetAltErrorPageURL(GetAlternateErrorPageURL());
-}
-
-void TabContentsWrapper::UpdateSafebrowsingDetectionHost() {
-#if defined(ENABLE_SAFE_BROWSING)
-  PrefService* prefs = profile()->GetPrefs();
-  bool safe_browsing = prefs->GetBoolean(prefs::kSafeBrowsingEnabled);
-  if (safe_browsing &&
-      g_browser_process->safe_browsing_detection_service()) {
-    if (!safebrowsing_detection_host_.get()) {
-      safebrowsing_detection_host_.reset(
-          safe_browsing::ClientSideDetectionHost::Create(tab_contents()));
-    }
-  } else {
-    safebrowsing_detection_host_.reset();
-  }
-  render_view_host()->Send(
-      new ChromeViewMsg_SetClientSidePhishingDetection(routing_id(),
-                                                       safe_browsing));
-#endif
-}
-
-void TabContentsWrapper::ExitFullscreenMode() {
-  if (tab_contents() && render_view_host())
-    tab_contents()->render_view_host()->ExitFullscreen();
-}