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