src/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/content_settings/content_settings_provider.h"
  11 #include "chrome/browser/content_settings/host_content_settings_map.h"
  12 #include "chrome/browser/platform_util.h"
  13 #include "chrome/browser/profiles/profile.h"
  14 #include "chrome/browser/search/instant_service.h"
  15 #include "chrome/browser/search/instant_service_factory.h"
  16 #include "chrome/browser/search/search.h"
  17 #include "chrome/browser/search_engines/search_terms_data.h"
  18 #include "chrome/browser/search_engines/template_url_service.h"
  19 #include "chrome/browser/search_engines/template_url_service_factory.h"
  20 #include "chrome/browser/ui/browser_instant_controller.h"
  21 #include "chrome/browser/ui/search/instant_search_prerenderer.h"
  22 #include "chrome/browser/ui/search/instant_tab.h"
  23 #include "chrome/browser/ui/search/search_tab_helper.h"
  24 #include "chrome/common/chrome_switches.h"
  25 #include "chrome/common/content_settings_types.h"
  26 #include "chrome/common/pref_names.h"
  27 #include "chrome/common/search_urls.h"
  28 #include "chrome/common/url_constants.h"
  29 #include "components/sessions/serialized_navigation_entry.h"
  30 #include "content/public/browser/navigation_entry.h"
  31 #include "content/public/browser/notification_service.h"
  32 #include "content/public/browser/render_process_host.h"
  33 #include "content/public/browser/render_widget_host_view.h"
  34 #include "content/public/browser/web_contents.h"
  35 #include "content/public/browser/web_contents_view.h"
  36 #include "net/base/escape.h"
  37 #include "net/base/network_change_notifier.h"
  38 #include "url/gurl.h"
  39
  40 #if defined(TOOLKIT_VIEWS)
  41 #include "ui/views/widget/widget.h"
  42 #endif
  43
  44 namespace {
  45
  46 bool IsContentsFrom(const InstantPage* page,
  47                     const content::WebContents* contents) {
  48   return page && (page->contents() == contents);
  49 }
  50
  51 // Adds a transient NavigationEntry to the supplied |contents|'s
  52 // NavigationController if the page's URL has not already been updated with the
  53 // supplied |search_terms|. Sets the |search_terms| on the transient entry for
  54 // search terms extraction to work correctly.
  55 void EnsureSearchTermsAreSet(content::WebContents* contents,
  56                              const base::string16& search_terms) {
  57   content::NavigationController* controller = &contents->GetController();
  58
  59   // If search terms are already correct or there is already a transient entry
  60   // (there shouldn't be), bail out early.
  61   if (chrome::GetSearchTerms(contents) == search_terms ||
  62       controller->GetTransientEntry())
  63     return;
  64
  65   const content::NavigationEntry* entry = controller->GetLastCommittedEntry();
  66   content::NavigationEntry* transient = controller->CreateNavigationEntry(
  67       entry->GetURL(),
  68       entry->GetReferrer(),
  69       entry->GetTransitionType(),
  70       false,
  71       std::string(),
  72       contents->GetBrowserContext());
  73   transient->SetExtraData(sessions::kSearchTermsKey, search_terms);
  74   controller->SetTransientEntry(transient);
  75
  76   SearchTabHelper::FromWebContents(contents)->NavigationEntryUpdated();
  77 }
  78
  79 }  // namespace
  80
  81 InstantController::InstantController(BrowserInstantController* browser)
  82     : browser_(browser),
  83       omnibox_focus_state_(OMNIBOX_FOCUS_NONE),
  84       omnibox_focus_change_reason_(OMNIBOX_FOCUS_CHANGE_EXPLICIT) {
  85 }
  86
  87 InstantController::~InstantController() {
  88 }
  89
  90 void InstantController::SetSuggestionToPrefetch(
  91     const InstantSuggestion& suggestion) {
  92   if (instant_tab_ &&
  93       SearchTabHelper::FromWebContents(instant_tab_->contents())->
  94           IsSearchResultsPage()) {
  95     if (chrome::ShouldPrefetchSearchResultsOnSRP() ||
  96         chrome::ShouldPrefetchSearchResults()) {
  97       SearchTabHelper::FromWebContents(instant_tab_->contents())->
  98           SetSuggestionToPrefetch(suggestion);
  99     }
 100   } else {
 101     if (chrome::ShouldPrefetchSearchResults()) {
 102       InstantSearchPrerenderer* prerenderer =
 103           InstantSearchPrerenderer::GetForProfile(profile());
 104       if (prerenderer)
 105         prerenderer->Prerender(suggestion);
 106     }
 107   }
 108 }
 109
 110 bool InstantController::SubmitQuery(const base::string16& search_terms) {
 111   if (instant_tab_ && instant_tab_->supports_instant() &&
 112       search_mode_.is_origin_search()) {
 113     // Use |instant_tab_| to run the query if we're already on a search results
 114     // page. (NOTE: in particular, we do not send the query to NTPs.)
 115     SearchTabHelper::FromWebContents(instant_tab_->contents())->Submit(
 116         search_terms);
 117     instant_tab_->contents()->GetView()->Focus();
 118     EnsureSearchTermsAreSet(instant_tab_->contents(), search_terms);
 119     return true;
 120   }
 121   return false;
 122 }
 123
 124 void InstantController::OmniboxFocusChanged(
 125     OmniboxFocusState state,
 126     OmniboxFocusChangeReason reason,
 127     gfx::NativeView view_gaining_focus) {
 128   LOG_INSTANT_DEBUG_EVENT(this, base::StringPrintf(
 129       "OmniboxFocusChanged: %d to %d for reason %d", omnibox_focus_state_,
 130       state, reason));
 131
 132   omnibox_focus_state_ = state;
 133   if (!instant_tab_)
 134     return;
 135
 136   content::NotificationService::current()->Notify(
 137       chrome::NOTIFICATION_OMNIBOX_FOCUS_CHANGED,
 138       content::Source<InstantController>(this),
 139       content::NotificationService::NoDetails());
 140
 141   instant_tab_->sender()->FocusChanged(omnibox_focus_state_, reason);
 142   // Don't send oninputstart/oninputend updates in response to focus changes
 143   // if there's a navigation in progress. This prevents Chrome from sending
 144   // a spurious oninputend when the user accepts a match in the omnibox.
 145   if (instant_tab_->contents()->GetController().GetPendingEntry() == NULL)
 146     instant_tab_->sender()->SetInputInProgress(IsInputInProgress());
 147 }
 148
 149 void InstantController::SearchModeChanged(const SearchMode& old_mode,
 150                                           const SearchMode& new_mode) {
 151   LOG_INSTANT_DEBUG_EVENT(this, base::StringPrintf(
 152       "SearchModeChanged: [origin:mode] %d:%d to %d:%d", old_mode.origin,
 153       old_mode.mode, new_mode.origin, new_mode.mode));
 154
 155   search_mode_ = new_mode;
 156   ResetInstantTab();
 157
 158   if (instant_tab_ && old_mode.is_ntp() != new_mode.is_ntp())
 159     instant_tab_->sender()->SetInputInProgress(IsInputInProgress());
 160 }
 161
 162 void InstantController::ActiveTabChanged() {
 163   LOG_INSTANT_DEBUG_EVENT(this, "ActiveTabChanged");
 164   ResetInstantTab();
 165 }
 166
 167 void InstantController::TabDeactivated(content::WebContents* contents) {
 168   // If user is deactivating an NTP tab, log the number of mouseovers for this
 169   // NTP session.
 170   if (chrome::IsInstantNTP(contents))
 171     InstantTab::EmitNtpStatistics(contents);
 172 }
 173
 174 void InstantController::LogDebugEvent(const std::string& info) const {
 175   DVLOG(1) << info;
 176
 177   debug_events_.push_front(std::make_pair(
 178       base::Time::Now().ToInternalValue(), info));
 179   static const size_t kMaxDebugEventSize = 2000;
 180   if (debug_events_.size() > kMaxDebugEventSize)
 181     debug_events_.pop_back();
 182 }
 183
 184 void InstantController::ClearDebugEvents() {
 185   debug_events_.clear();
 186 }
 187
 188 Profile* InstantController::profile() const {
 189   return browser_->profile();
 190 }
 191
 192 InstantTab* InstantController::instant_tab() const {
 193   return instant_tab_.get();
 194 }
 195
 196 void InstantController::InstantSupportChanged(
 197     InstantSupportState instant_support) {
 198   // Handle INSTANT_SUPPORT_YES here because InstantPage is not hooked up to the
 199   // active tab. Search model changed listener in InstantPage will handle other
 200   // cases.
 201   if (instant_support != INSTANT_SUPPORT_YES)
 202     return;
 203
 204   ResetInstantTab();
 205 }
 206
 207 void InstantController::InstantSupportDetermined(
 208     const content::WebContents* contents,
 209     bool supports_instant) {
 210   DCHECK(IsContentsFrom(instant_tab(), contents));
 211
 212   if (!supports_instant)
 213     base::MessageLoop::current()->DeleteSoon(FROM_HERE, instant_tab_.release());
 214
 215   content::NotificationService::current()->Notify(
 216       chrome::NOTIFICATION_INSTANT_TAB_SUPPORT_DETERMINED,
 217       content::Source<InstantController>(this),
 218       content::NotificationService::NoDetails());
 219 }
 220
 221 void InstantController::InstantPageAboutToNavigateMainFrame(
 222     const content::WebContents* contents,
 223     const GURL& url) {
 224   DCHECK(IsContentsFrom(instant_tab(), contents));
 225
 226   // The Instant tab navigated.  Send it the data it needs to display
 227   // properly.
 228   UpdateInfoForInstantTab();
 229 }
 230
 231 void InstantController::ResetInstantTab() {
 232   if (!search_mode_.is_origin_default()) {
 233     content::WebContents* active_tab = browser_->GetActiveWebContents();
 234     if (!instant_tab_ || active_tab != instant_tab_->contents()) {
 235       instant_tab_.reset(new InstantTab(this, browser_->profile()));
 236       instant_tab_->Init(active_tab);
 237       UpdateInfoForInstantTab();
 238     }
 239   } else {
 240     instant_tab_.reset();
 241   }
 242 }
 243
 244 void InstantController::UpdateInfoForInstantTab() {
 245   if (instant_tab_) {
 246     // Update theme details.
 247     InstantService* instant_service = GetInstantService();
 248     if (instant_service) {
 249       instant_service->UpdateThemeInfo();
 250       instant_service->UpdateMostVisitedItemsInfo();
 251     }
 252
 253     instant_tab_->sender()->FocusChanged(omnibox_focus_state_,
 254                                          omnibox_focus_change_reason_);
 255     instant_tab_->sender()->SetInputInProgress(IsInputInProgress());
 256   }
 257 }
 258
 259 bool InstantController::IsInputInProgress() const {
 260   return !search_mode_.is_ntp() &&
 261       omnibox_focus_state_ == OMNIBOX_FOCUS_VISIBLE;
 262 }
 263
 264 InstantService* InstantController::GetInstantService() const {
 265   return InstantServiceFactory::GetForProfile(profile());
 266 }