Instant: Use only one hidden WebContents per profile.

chrome/browser/ui/browser_instant_controller.cc

 // Copyright 2012 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/browser_instant_controller.h"
 
-#include "base/prefs/pref_service.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_web_ui.h"
-#include "chrome/browser/instant/search.h"
+#include "chrome/browser/instant/instant_controller.h"
 #include "chrome/browser/profiles/profile.h"
-#include "chrome/browser/themes/theme_properties.h"
-#include "chrome/browser/themes/theme_service.h"
-#include "chrome/browser/themes/theme_service_factory.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/omnibox/location_bar.h"
 #include "chrome/browser/ui/omnibox/omnibox_view.h"
-#include "chrome/browser/ui/search/search_tab_helper.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/browser/ui/webui/ntp/app_launcher_handler.h"
 #include "chrome/common/chrome_notification_types.h"
-#include "chrome/common/pref_names.h"
 #include "chrome/common/url_constants.h"
-#include "components/user_prefs/pref_registry_syncable.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/user_metrics.h"
-#include "grit/theme_resources.h"
-#include "ui/gfx/color_utils.h"
-#include "ui/gfx/sys_color_change_listener.h"
+#include "content/public/browser/web_contents.h"
 
 using content::UserMetricsAction;
 
 namespace chrome {
 
-////////////////////////////////////////////////////////////////////////////////
-// BrowserInstantController, public:
-
 BrowserInstantController::BrowserInstantController(Browser* browser)
     : browser_(browser),
-      instant_(ALLOW_THIS_IN_INITIALIZER_LIST(this),
-               chrome::search::IsInstantExtendedAPIEnabled()),
-      instant_unload_handler_(browser),
-      initialized_theme_info_(false) {
-
-  // In one mode of the InstantExtended experiments, the kInstantExtendedEnabled
-  // preference's default value is set to the existing value of kInstantEnabled.
-  // Because this requires reading the value of the kInstantEnabled value, we
-  // reset the default for kInstantExtendedEnabled here.
-  chrome::search::SetInstantExtendedPrefDefault(profile());
-
-  profile_pref_registrar_.Init(profile()->GetPrefs());
-  profile_pref_registrar_.Add(
-      prefs::kInstantEnabled,
-      base::Bind(&BrowserInstantController::ResetInstant,
-                 base::Unretained(this)));
-  profile_pref_registrar_.Add(
-      prefs::kInstantExtendedEnabled,
-      base::Bind(&BrowserInstantController::ResetInstant,
-                 base::Unretained(this)));
-  profile_pref_registrar_.Add(
-      prefs::kSearchSuggestEnabled,
-      base::Bind(&BrowserInstantController::ResetInstant,
-                 base::Unretained(this)));
-  ResetInstant(std::string());
-  browser_->search_model()->AddObserver(this);
-
-#if defined(ENABLE_THEMES)
-  // Listen for theme installation.
-  registrar_.Add(this, chrome::NOTIFICATION_BROWSER_THEME_CHANGED,
-                 content::Source<ThemeService>(
-                     ThemeServiceFactory::GetForProfile(profile())));
-#endif  // defined(ENABLE_THEMES)
+      instant_(InstantController::Create(
+          ALLOW_THIS_IN_INITIALIZER_LIST(this), browser->profile())),
+      instant_unload_handler_(browser) {
 }
 
 BrowserInstantController::~BrowserInstantController() {
-  browser_->search_model()->RemoveObserver(this);
 }
 
 bool BrowserInstantController::MaybeSwapInInstantNTPContents(
     const GURL& url,
     content::WebContents* source_contents,
     content::WebContents** target_contents) {
   if (url != GURL(chrome::kChromeUINewTabURL))
     return false;
 
   GURL extension_url(url);
-  if (ExtensionWebUI::HandleChromeURLOverride(&extension_url, profile())) {
+  if (ExtensionWebUI::HandleChromeURLOverride(&extension_url,
+                                              browser_->profile())) {
     // If there is an extension overriding the NTP do not use the Instant NTP.
     return false;
   }
 
-  scoped_ptr<content::WebContents> instant_ntp = instant_.ReleaseNTPContents();
+  scoped_ptr<content::WebContents> instant_ntp = instant_->ReleaseNTPContents();
   if (!instant_ntp)
     return false;
 
   *target_contents = instant_ntp.get();
+
   if (source_contents) {
     instant_ntp->GetController().CopyStateFromAndPrune(
         &source_contents->GetController());
     ReplaceWebContentsAt(
         browser_->tab_strip_model()->GetIndexOfWebContents(source_contents),
         instant_ntp.Pass());
   } else {
     instant_ntp->GetController().PruneAllButActive();
     // If |source_contents| is NULL, then the caller is responsible for
     // inserting instant_ntp into the tabstrip and will take ownership.
     ignore_result(instant_ntp.release());
   }
   content::RecordAction(UserMetricsAction("InstantExtended.ShowNTP"));
+
+  content::NotificationService::current()->Notify(
+      chrome::NOTIFICATION_INSTANT_COMMITTED,
+      content::Source<content::WebContents>(*target_contents),
+      content::NotificationService::NoDetails());
   return true;
 }
 
 bool BrowserInstantController::OpenInstant(WindowOpenDisposition disposition) {
   // Unsupported dispositions.
   if (disposition == NEW_BACKGROUND_TAB || disposition == NEW_WINDOW)
     return false;
 
   // The omnibox currently doesn't use other dispositions, so we don't attempt
   // to handle them. If you hit this DCHECK file a bug and I'll (sky) add
   // support for the new disposition.
   DCHECK(disposition == CURRENT_TAB ||
          disposition == NEW_FOREGROUND_TAB) << disposition;
 
-  return instant_.CommitIfPossible(disposition == CURRENT_TAB ?
+  return instant_->CommitIfPossible(disposition == CURRENT_TAB ?
       INSTANT_COMMIT_PRESSED_ENTER : INSTANT_COMMIT_PRESSED_ALT_ENTER);
 }
 
-Profile* BrowserInstantController::profile() const {
-  return browser_->profile();
-}
-
 void BrowserInstantController::CommitInstant(
     scoped_ptr<content::WebContents> overlay,
+    content::PageTransition transition,
     bool in_new_tab) {
-  if (profile()->GetExtensionService()->IsInstalledApp(overlay->GetURL())) {
+  if (browser_->profile()->GetExtensionService()->IsInstalledApp(
+          overlay->GetURL())) {
     AppLauncherHandler::RecordAppLaunchType(
         extension_misc::APP_LAUNCH_OMNIBOX_INSTANT);
   }
+
+  content::WebContents* overlay_contents = overlay.get();
+
   if (in_new_tab) {
-    // TabStripModel takes ownership of |overlay|.
     browser_->tab_strip_model()->AddWebContents(overlay.release(), -1,
-        instant_.last_transition_type(), TabStripModel::ADD_ACTIVE);
+        transition, TabStripModel::ADD_ACTIVE);
   } else {
-    ReplaceWebContentsAt(
-        browser_->tab_strip_model()->active_index(),
-        overlay.Pass());
+    ReplaceWebContentsAt(browser_->tab_strip_model()->active_index(),
+                         overlay.Pass());
   }
-}
 
-void BrowserInstantController::ReplaceWebContentsAt(
-    int index,
-    scoped_ptr<content::WebContents> new_contents) {
-  DCHECK_NE(TabStripModel::kNoTab, index);
-  scoped_ptr<content::WebContents> old_contents(browser_->tab_strip_model()->
-      ReplaceWebContentsAt(index, new_contents.release()));
-  instant_unload_handler_.RunUnloadListenersOrDestroy(old_contents.Pass(),
-                                                      index);
+  content::NotificationService::current()->Notify(
+      chrome::NOTIFICATION_INSTANT_COMMITTED,
+      content::Source<content::WebContents>(overlay_contents),
+      content::NotificationService::NoDetails());
 }
 
 void BrowserInstantController::SetInstantSuggestion(
     const InstantSuggestion& suggestion) {
-  browser_->window()->GetLocationBar()->SetInstantSuggestion(suggestion);
+  browser_->window()->GetLocationBar()->GetLocationEntry()->model()->
+      SetInstantSuggestion(suggestion);
 }
 
 void BrowserInstantController::CommitSuggestedText(
     bool skip_inline_autocomplete) {
   browser_->window()->GetLocationBar()->GetLocationEntry()->model()->
       CommitSuggestedText(skip_inline_autocomplete);
 }
 
-gfx::Rect BrowserInstantController::GetInstantBounds() {
+gfx::Rect BrowserInstantController::GetInstantBounds() const {
   return browser_->window()->GetInstantBounds();
 }
 
 void BrowserInstantController::InstantOverlayFocused() {
   // NOTE: This is only invoked on aura.
-  browser_->window()->WebContentsFocused(instant_.GetOverlayContents());
+  browser_->window()->WebContentsFocused(instant_->GetOverlayContents());
 }
 
 void BrowserInstantController::FocusOmnibox(bool caret_visibility) {
-  OmniboxView* omnibox_view = browser_->window()->GetLocationBar()->
-      GetLocationEntry();
+  OmniboxView* omnibox_view =
+      browser_->window()->GetLocationBar()->GetLocationEntry();
   omnibox_view->SetFocus();
   omnibox_view->model()->SetCaretVisibility(caret_visibility);
 }
 
 content::WebContents* BrowserInstantController::GetActiveWebContents() const {
   return browser_->tab_strip_model()->GetActiveWebContents();
 }
 
-void BrowserInstantController::ActiveTabChanged() {
-  instant_.ActiveTabChanged();
+void BrowserInstantController::OpenURL(const GURL& url,
+                                       content::PageTransition transition,
+                                       WindowOpenDisposition disposition) {
+  browser_->OpenURL(content::OpenURLParams(
+      url, content::Referrer(), disposition, transition, false));
 }
 
-void BrowserInstantController::TabDeactivated(content::WebContents* contents) {
-  instant_.TabDeactivated(contents);
-}
-
-void BrowserInstantController::UpdateThemeInfo() {
-  // Update theme background info.
-  // Initialize |theme_info| if necessary.
-  if (!initialized_theme_info_)
-    OnThemeChanged(ThemeServiceFactory::GetForProfile(profile()));
-  else
-    OnThemeChanged(NULL);
-}
-
-void BrowserInstantController::OpenURL(
-    const GURL& url,
-    content::PageTransition transition,
-    WindowOpenDisposition disposition) {
-  browser_->OpenURL(content::OpenURLParams(url,
-                                           content::Referrer(),
-                                           disposition,
-                                           transition,
-                                           false));
-}
-
-void BrowserInstantController::SetOmniboxBounds(const gfx::Rect& bounds) {
-  instant_.SetOmniboxBounds(bounds);
-}
-
-void BrowserInstantController::ResetInstant(const std::string& pref_name) {
-  // Update the default value of the kInstantExtendedEnabled pref to match the
-  // value of the kInstantEnabled pref, if necessary.
-  if (pref_name == prefs::kInstantEnabled)
-    chrome::search::SetInstantExtendedPrefDefault(profile());
-
-  bool instant_pref_enabled = chrome::search::IsInstantPrefEnabled(profile());
-  bool use_local_overlay_only = profile()->IsOffTheRecord() ||
-      (!instant_pref_enabled &&
-       !profile()->GetPrefs()->GetBoolean(prefs::kSearchSuggestEnabled));
-  instant_.SetInstantEnabled(instant_pref_enabled, use_local_overlay_only);
-}
-
-////////////////////////////////////////////////////////////////////////////////
-// BrowserInstantController, search::SearchModelObserver implementation:
-
-void BrowserInstantController::ModeChanged(const search::Mode& old_mode,
-                                           const search::Mode& new_mode) {
-  // If mode is now |NTP|, send theme-related information to Instant.
-  if (new_mode.is_ntp())
-    UpdateThemeInfo();
-
-  instant_.SearchModeChanged(old_mode, new_mode);
-}
-
-////////////////////////////////////////////////////////////////////////////////
-// BrowserInstantController, content::NotificationObserver implementation:
-
-void BrowserInstantController::Observe(
-    int type,
-    const content::NotificationSource& source,
-    const content::NotificationDetails& details) {
-#if defined(ENABLE_THEMES)
-  DCHECK_EQ(chrome::NOTIFICATION_BROWSER_THEME_CHANGED, type);
-  OnThemeChanged(content::Source<ThemeService>(source).ptr());
-#endif  // defined(ENABLE_THEMES)
-}
-
-void BrowserInstantController::OnThemeChanged(ThemeService* theme_service) {
-  if (theme_service) {  // Get theme information from theme service.
-    theme_info_ = ThemeBackgroundInfo();
-
-    // Set theme background color.
-    SkColor background_color =
-        theme_service->GetColor(ThemeProperties::COLOR_NTP_BACKGROUND);
-    if (gfx::IsInvertedColorScheme())
-      background_color = color_utils::InvertColor(background_color);
-    theme_info_.color_r = SkColorGetR(background_color);
-    theme_info_.color_g = SkColorGetG(background_color);
-    theme_info_.color_b = SkColorGetB(background_color);
-    theme_info_.color_a = SkColorGetA(background_color);
-
-    if (theme_service->HasCustomImage(IDR_THEME_NTP_BACKGROUND)) {
-      // Set theme id for theme background image url.
-      theme_info_.theme_id = theme_service->GetThemeID();
-
-      // Set theme background image horizontal alignment.
-      int alignment = 0;
-      theme_service->GetDisplayProperty(
-          ThemeProperties::NTP_BACKGROUND_ALIGNMENT, &alignment);
-      if (alignment & ThemeProperties::ALIGN_LEFT) {
-        theme_info_.image_horizontal_alignment = THEME_BKGRND_IMAGE_ALIGN_LEFT;
-      } else if (alignment & ThemeProperties::ALIGN_RIGHT) {
-        theme_info_.image_horizontal_alignment = THEME_BKGRND_IMAGE_ALIGN_RIGHT;
-      } else {  // ALIGN_CENTER
-        theme_info_.image_horizontal_alignment =
-            THEME_BKGRND_IMAGE_ALIGN_CENTER;
-      }
-
-      // Set theme background image vertical alignment.
-      if (alignment & ThemeProperties::ALIGN_TOP)
-        theme_info_.image_vertical_alignment = THEME_BKGRND_IMAGE_ALIGN_TOP;
-      else if (alignment & ThemeProperties::ALIGN_BOTTOM)
-        theme_info_.image_vertical_alignment = THEME_BKGRND_IMAGE_ALIGN_BOTTOM;
-      else  // ALIGN_CENTER
-        theme_info_.image_vertical_alignment = THEME_BKGRND_IMAGE_ALIGN_CENTER;
-
-      // Set theme background image tiling.
-      int tiling = 0;
-      theme_service->GetDisplayProperty(ThemeProperties::NTP_BACKGROUND_TILING,
-                                        &tiling);
-      switch (tiling) {
-        case ThemeProperties::NO_REPEAT:
-            theme_info_.image_tiling = THEME_BKGRND_IMAGE_NO_REPEAT;
-            break;
-        case ThemeProperties::REPEAT_X:
-            theme_info_.image_tiling = THEME_BKGRND_IMAGE_REPEAT_X;
-            break;
-        case ThemeProperties::REPEAT_Y:
-            theme_info_.image_tiling = THEME_BKGRND_IMAGE_REPEAT_Y;
-            break;
-        case ThemeProperties::REPEAT:
-            theme_info_.image_tiling = THEME_BKGRND_IMAGE_REPEAT;
-            break;
-      }
-
-      // Set theme background image height.
-      gfx::ImageSkia* image = theme_service->GetImageSkiaNamed(
-          IDR_THEME_NTP_BACKGROUND);
-      DCHECK(image);
-      theme_info_.image_height = image->height();
-    }
-
-    initialized_theme_info_ = true;
-  }
-
-  DCHECK(initialized_theme_info_);
-
-  if (browser_->search_model()->mode().is_ntp())
-    instant_.ThemeChanged(theme_info_);
+void BrowserInstantController::ReplaceWebContentsAt(
+    int index,
+    scoped_ptr<content::WebContents> new_contents) {
+  DCHECK_NE(TabStripModel::kNoTab, index);
+  scoped_ptr<content::WebContents> old_contents(browser_->tab_strip_model()->
+      ReplaceWebContentsAt(index, new_contents.release()));
+  instant_unload_handler_.RunUnloadListenersOrDestroy(old_contents.Pass(),
+                                                      index);
 }
 
 }  // namespace chrome