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