src/chrome/browser/ui/browser_instant_controller.cc

   1 // Copyright 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/browser_instant_controller.h"
   6
   7 #include "base/bind.h"
   8 #include "chrome/browser/extensions/extension_service.h"
   9 #include "chrome/browser/extensions/extension_web_ui.h"
  10 #include "chrome/browser/infobars/infobar_service.h"
  11 #include "chrome/browser/profiles/profile.h"
  12 #include "chrome/browser/search/instant_service.h"
  13 #include "chrome/browser/search/instant_service_factory.h"
  14 #include "chrome/browser/search/search.h"
  15 #include "chrome/browser/ui/browser.h"
  16 #include "chrome/browser/ui/browser_window.h"
  17 #include "chrome/browser/ui/location_bar/location_bar.h"
  18 #include "chrome/browser/ui/omnibox/omnibox_popup_model.h"
  19 #include "chrome/browser/ui/omnibox/omnibox_view.h"
  20 #include "chrome/browser/ui/search/instant_search_prerenderer.h"
  21 #include "chrome/browser/ui/search/search_model.h"
  22 #include "chrome/browser/ui/search/search_tab_helper.h"
  23 #include "chrome/browser/ui/tabs/tab_strip_model.h"
  24 #include "chrome/browser/ui/webui/ntp/app_launcher_handler.h"
  25 #include "chrome/common/url_constants.h"
  26 #include "content/public/browser/render_process_host.h"
  27 #include "content/public/browser/user_metrics.h"
  28 #include "content/public/browser/web_contents.h"
  29
  30
  31 // Helpers --------------------------------------------------------------------
  32
  33 namespace {
  34
  35 InstantSearchPrerenderer* GetInstantSearchPrerenderer(Profile* profile) {
  36   DCHECK(profile);
  37   InstantService* instant_service =
  38       InstantServiceFactory::GetForProfile(profile);
  39   return instant_service ? instant_service->instant_search_prerenderer() : NULL;
  40 }
  41
  42 }  // namespace
  43
  44
  45 // BrowserInstantController ---------------------------------------------------
  46
  47 BrowserInstantController::BrowserInstantController(Browser* browser)
  48     : browser_(browser),
  49       instant_(this) {
  50   browser_->search_model()->AddObserver(this);
  51
  52   InstantService* instant_service =
  53       InstantServiceFactory::GetForProfile(profile());
  54   instant_service->AddObserver(this);
  55 }
  56
  57 BrowserInstantController::~BrowserInstantController() {
  58   browser_->search_model()->RemoveObserver(this);
  59
  60   InstantService* instant_service =
  61       InstantServiceFactory::GetForProfile(profile());
  62   instant_service->RemoveObserver(this);
  63 }
  64
  65 bool BrowserInstantController::OpenInstant(WindowOpenDisposition disposition,
  66                                            const GURL& url) {
  67   // Unsupported dispositions.
  68   if (disposition == NEW_BACKGROUND_TAB || disposition == NEW_WINDOW ||
  69       disposition == NEW_FOREGROUND_TAB)
  70     return false;
  71
  72   // The omnibox currently doesn't use other dispositions, so we don't attempt
  73   // to handle them. If you hit this DCHECK file a bug and I'll (sky) add
  74   // support for the new disposition.
  75   DCHECK(disposition == CURRENT_TAB) << disposition;
  76
  77   const base::string16& search_terms =
  78       chrome::ExtractSearchTermsFromURL(profile(), url);
  79   if (search_terms.empty())
  80     return false;
  81
  82   InstantSearchPrerenderer* prerenderer =
  83       GetInstantSearchPrerenderer(profile());
  84   if (prerenderer) {
  85     if (prerenderer->CanCommitQuery(GetActiveWebContents(), search_terms)) {
  86       // Submit query to render the prefetched results. Browser will swap the
  87       // prerendered contents with the active tab contents.
  88       prerenderer->Commit(search_terms);
  89       return false;
  90     } else {
  91       prerenderer->Cancel();
  92     }
  93   }
  94
  95   // If we will not be replacing search terms from this URL, don't send to
  96   // InstantController.
  97   if (!chrome::IsQueryExtractionAllowedForURL(profile(), url))
  98     return false;
  99
 100   return instant_.SubmitQuery(search_terms);
 101 }
 102
 103 Profile* BrowserInstantController::profile() const {
 104   return browser_->profile();
 105 }
 106
 107 content::WebContents* BrowserInstantController::GetActiveWebContents() const {
 108   return browser_->tab_strip_model()->GetActiveWebContents();
 109 }
 110
 111 void BrowserInstantController::ActiveTabChanged() {
 112   instant_.ActiveTabChanged();
 113 }
 114
 115 void BrowserInstantController::TabDeactivated(content::WebContents* contents) {
 116   instant_.TabDeactivated(contents);
 117
 118   InstantSearchPrerenderer* prerenderer =
 119       GetInstantSearchPrerenderer(profile());
 120   if (prerenderer)
 121     prerenderer->Cancel();
 122 }
 123
 124 void BrowserInstantController::ModelChanged(
 125     const SearchModel::State& old_state,
 126     const SearchModel::State& new_state) {
 127   if (old_state.mode != new_state.mode) {
 128     const SearchMode& new_mode = new_state.mode;
 129
 130     // Record some actions corresponding to the mode change. Note that to get
 131     // the full story, it's necessary to look at other UMA actions as well,
 132     // such as tab switches.
 133     if (new_mode.is_search_results())
 134       content::RecordAction(base::UserMetricsAction("InstantExtended.ShowSRP"));
 135     else if (new_mode.is_ntp())
 136       content::RecordAction(base::UserMetricsAction("InstantExtended.ShowNTP"));
 137
 138     instant_.SearchModeChanged(old_state.mode, new_mode);
 139   }
 140
 141   if (old_state.instant_support != new_state.instant_support)
 142     instant_.InstantSupportChanged(new_state.instant_support);
 143 }
 144
 145 void BrowserInstantController::DefaultSearchProviderChanged() {
 146   InstantService* instant_service =
 147       InstantServiceFactory::GetForProfile(profile());
 148   if (!instant_service)
 149     return;
 150
 151   TabStripModel* tab_model = browser_->tab_strip_model();
 152   int count = tab_model->count();
 153   for (int index = 0; index < count; ++index) {
 154     content::WebContents* contents = tab_model->GetWebContentsAt(index);
 155     if (!contents)
 156       continue;
 157
 158     // Send new search URLs to the renderer.
 159     content::RenderProcessHost* rph = contents->GetRenderProcessHost();
 160     instant_service->SendSearchURLsToRenderer(rph);
 161
 162     // Reload the contents to ensure that it gets assigned to a non-priviledged
 163     // renderer.
 164     if (!instant_service->IsInstantProcess(rph->GetID()))
 165       continue;
 166
 167     contents->GetController().Reload(false);
 168
 169     // As the reload was not triggered by the user we don't want to close any
 170     // infobars. We have to tell the InfoBarService after the reload, otherwise
 171     // it would ignore this call when
 172     // WebContentsObserver::DidStartNavigationToPendingEntry is invoked.
 173     InfoBarService::FromWebContents(contents)->set_ignore_next_reload();
 174   }
 175 }