chrome/browser/ui/search/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/search/instant_controller.h"
   6
   7 #include "base/prefs/pref_service.h"
   8 #include "base/strings/stringprintf.h"
   9 #include "chrome/browser/chrome_notification_types.h"
  10 #include "chrome/browser/platform_util.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/search_engines/template_url_service_factory.h"
  16 #include "chrome/browser/ui/browser_instant_controller.h"
  17 #include "chrome/browser/ui/search/instant_tab.h"
  18 #include "chrome/browser/ui/search/search_tab_helper.h"
  19 #include "chrome/common/chrome_switches.h"
  20 #include "chrome/common/search_urls.h"
  21 #include "chrome/common/url_constants.h"
  22 #include "components/search_engines/template_url_service.h"
  23 #include "components/sessions/serialized_navigation_entry.h"
  24 #include "content/public/browser/navigation_entry.h"
  25 #include "content/public/browser/notification_service.h"
  26 #include "content/public/browser/render_process_host.h"
  27 #include "content/public/browser/render_widget_host_view.h"
  28 #include "content/public/browser/web_contents.h"
  29 #include "net/base/escape.h"
  30 #include "net/base/network_change_notifier.h"
  31 #include "url/gurl.h"
  32
  33 namespace {
  34
  35 bool IsContentsFrom(const InstantPage* page,
  36                     const content::WebContents* contents) {
  37   return page && (page->web_contents() == contents);
  38 }
  39
  40 // Adds a transient NavigationEntry to the supplied |contents|'s
  41 // NavigationController if the page's URL has not already been updated with the
  42 // supplied |search_terms|. Sets the |search_terms| on the transient entry for
  43 // search terms extraction to work correctly.
  44 void EnsureSearchTermsAreSet(content::WebContents* contents,
  45                              const base::string16& search_terms) {
  46   content::NavigationController* controller = &contents->GetController();
  47
  48   // If search terms are already correct or there is already a transient entry
  49   // (there shouldn't be), bail out early.
  50   if (chrome::GetSearchTerms(contents) == search_terms ||
  51       controller->GetTransientEntry())
  52     return;
  53
  54   const content::NavigationEntry* entry = controller->GetLastCommittedEntry();
  55   scoped_ptr<content::NavigationEntry> transient =
  56       controller->CreateNavigationEntry(
  57           entry->GetURL(),
  58           entry->GetReferrer(),
  59           entry->GetTransitionType(),
  60           false,
  61           std::string(),
  62           contents->GetBrowserContext());
  63   transient->SetExtraData(sessions::kSearchTermsKey, search_terms);
  64   controller->SetTransientEntry(transient.Pass());
  65
  66   SearchTabHelper::FromWebContents(contents)->NavigationEntryUpdated();
  67 }
  68
  69 }  // namespace
  70
  71 InstantController::InstantController(BrowserInstantController* browser)
  72     : browser_(browser) {
  73 }
  74
  75 InstantController::~InstantController() {
  76 }
  77
  78 bool InstantController::SubmitQuery(const base::string16& search_terms,
  79                                     const EmbeddedSearchRequestParams& params) {
  80   if (instant_tab_ && instant_tab_->supports_instant() &&
  81       search_mode_.is_origin_search()) {
  82     // Use |instant_tab_| to run the query if we're already on a search results
  83     // page. (NOTE: in particular, we do not send the query to NTPs.)
  84     SearchTabHelper::FromWebContents(instant_tab_->web_contents())->Submit(
  85         search_terms, params);
  86     instant_tab_->web_contents()->Focus();
  87     EnsureSearchTermsAreSet(instant_tab_->web_contents(), search_terms);
  88     return true;
  89   }
  90   return false;
  91 }
  92
  93 void InstantController::SearchModeChanged(const SearchMode& old_mode,
  94                                           const SearchMode& new_mode) {
  95   LOG_INSTANT_DEBUG_EVENT(this, base::StringPrintf(
  96       "SearchModeChanged: [origin:mode] %d:%d to %d:%d", old_mode.origin,
  97       old_mode.mode, new_mode.origin, new_mode.mode));
  98
  99   search_mode_ = new_mode;
 100   ResetInstantTab();
 101 }
 102
 103 void InstantController::ActiveTabChanged() {
 104   LOG_INSTANT_DEBUG_EVENT(this, "ActiveTabChanged");
 105   ResetInstantTab();
 106 }
 107
 108 void InstantController::TabDeactivated(content::WebContents* contents) {
 109   // If user is deactivating an NTP tab, log the number of mouseovers for this
 110   // NTP session.
 111   if (chrome::IsInstantNTP(contents))
 112     InstantTab::EmitNtpStatistics(contents);
 113 }
 114
 115 void InstantController::LogDebugEvent(const std::string& info) const {
 116   DVLOG(1) << info;
 117
 118   debug_events_.push_front(std::make_pair(
 119       base::Time::Now().ToInternalValue(), info));
 120   static const size_t kMaxDebugEventSize = 2000;
 121   if (debug_events_.size() > kMaxDebugEventSize)
 122     debug_events_.pop_back();
 123 }
 124
 125 void InstantController::ClearDebugEvents() {
 126   debug_events_.clear();
 127 }
 128
 129 Profile* InstantController::profile() const {
 130   return browser_->profile();
 131 }
 132
 133 InstantTab* InstantController::instant_tab() const {
 134   return instant_tab_.get();
 135 }
 136
 137 void InstantController::InstantSupportChanged(
 138     InstantSupportState instant_support) {
 139   // Handle INSTANT_SUPPORT_YES here because InstantPage is not hooked up to the
 140   // active tab. Search model changed listener in InstantPage will handle other
 141   // cases.
 142   if (instant_support != INSTANT_SUPPORT_YES)
 143     return;
 144
 145   ResetInstantTab();
 146 }
 147
 148 void InstantController::InstantSupportDetermined(
 149     const content::WebContents* contents,
 150     bool supports_instant) {
 151   DCHECK(IsContentsFrom(instant_tab(), contents));
 152
 153   if (!supports_instant)
 154     base::MessageLoop::current()->DeleteSoon(FROM_HERE, instant_tab_.release());
 155
 156   content::NotificationService::current()->Notify(
 157       chrome::NOTIFICATION_INSTANT_TAB_SUPPORT_DETERMINED,
 158       content::Source<InstantController>(this),
 159       content::NotificationService::NoDetails());
 160 }
 161
 162 void InstantController::InstantPageAboutToNavigateMainFrame(
 163     const content::WebContents* contents,
 164     const GURL& url) {
 165   DCHECK(IsContentsFrom(instant_tab(), contents));
 166
 167   // The Instant tab navigated.  Send it the data it needs to display
 168   // properly.
 169   UpdateInfoForInstantTab();
 170 }
 171
 172 void InstantController::ResetInstantTab() {
 173   if (!search_mode_.is_origin_default()) {
 174     content::WebContents* active_tab = browser_->GetActiveWebContents();
 175     if (!instant_tab_ || active_tab != instant_tab_->web_contents()) {
 176       instant_tab_.reset(new InstantTab(this, browser_->profile()));
 177       instant_tab_->Init(active_tab);
 178       UpdateInfoForInstantTab();
 179     }
 180   } else {
 181     instant_tab_.reset();
 182   }
 183 }
 184
 185 void InstantController::UpdateInfoForInstantTab() {
 186   if (instant_tab_) {
 187     // Update theme details.
 188     InstantService* instant_service = GetInstantService();
 189     if (instant_service) {
 190       instant_service->UpdateThemeInfo();
 191       instant_service->UpdateMostVisitedItemsInfo();
 192     }
 193   }
 194 }
 195
 196 InstantService* InstantController::GetInstantService() const {
 197   return InstantServiceFactory::GetForProfile(profile());
 198 }