src/chrome/browser/autocomplete/extension_app_provider.cc

   1 // Copyright (c) 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/autocomplete/extension_app_provider.h"
   6
   7 #include <algorithm>
   8 #include <cmath>
   9
  10 #include "base/strings/string16.h"
  11 #include "base/strings/utf_string_conversions.h"
  12 #include "chrome/browser/chrome_notification_types.h"
  13 #include "chrome/browser/extensions/extension_service.h"
  14 #include "chrome/browser/extensions/extension_system_factory.h"
  15 #include "chrome/browser/extensions/extension_util.h"
  16 #include "chrome/browser/history/history_service.h"
  17 #include "chrome/browser/history/history_service_factory.h"
  18 #include "chrome/browser/history/url_database.h"
  19 #include "chrome/browser/profiles/profile.h"
  20 #include "chrome/browser/ui/extensions/application_launch.h"
  21 #include "chrome/browser/ui/webui/ntp/core_app_launcher_handler.h"
  22 #include "chrome/common/extensions/extension.h"
  23 #include "chrome/common/extensions/manifest_handlers/app_launch_info.h"
  24 #include "content/public/browser/notification_source.h"
  25 #include "ui/base/l10n/l10n_util.h"
  26
  27 ExtensionAppProvider::ExtensionAppProvider(
  28     AutocompleteProviderListener* listener,
  29     Profile* profile)
  30     : AutocompleteProvider(listener, profile,
  31           AutocompleteProvider::TYPE_EXTENSION_APP) {
  32   // Notifications of extensions loading and unloading always come from the
  33   // non-incognito profile, but we need to see them regardless, as the incognito
  34   // windows can be affected.
  35   registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_LOADED,
  36                  content::Source<Profile>(profile_->GetOriginalProfile()));
  37   registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_UNINSTALLED,
  38                  content::Source<Profile>(profile_->GetOriginalProfile()));
  39   RefreshAppList();
  40 }
  41
  42 // static.
  43 void ExtensionAppProvider::LaunchAppFromOmnibox(
  44     const AutocompleteMatch& match,
  45     Profile* profile,
  46     WindowOpenDisposition disposition) {
  47   ExtensionService* service =
  48       extensions::ExtensionSystemFactory::GetForProfile(profile)->
  49       extension_service();
  50   const extensions::Extension* extension =
  51       service->GetInstalledApp(match.destination_url);
  52   // While the Omnibox popup is open, the extension can be updated, changing
  53   // its URL and leaving us with no extension being found. In this case, we
  54   // ignore the request.
  55   if (!extension)
  56     return;
  57
  58   CoreAppLauncherHandler::RecordAppLaunchType(
  59       extension_misc::APP_LAUNCH_OMNIBOX_APP,
  60       extension->GetType());
  61
  62   OpenApplication(AppLaunchParams(profile, extension, disposition));
  63 }
  64
  65 void ExtensionAppProvider::AddExtensionAppForTesting(
  66     const ExtensionApp& extension_app) {
  67   extension_apps_.push_back(extension_app);
  68 }
  69
  70 AutocompleteMatch ExtensionAppProvider::CreateAutocompleteMatch(
  71     const AutocompleteInput& input,
  72     const ExtensionApp& app,
  73     size_t name_match_index,
  74     size_t url_match_index) {
  75   // TODO(finnur): Figure out what type to return here, might want to have
  76   // the extension icon/a generic icon show up in the Omnibox.
  77   AutocompleteMatch match(this, 0, false,
  78                           AutocompleteMatchType::EXTENSION_APP);
  79   match.fill_into_edit =
  80       app.should_match_against_launch_url ? app.launch_url : input.text();
  81   match.destination_url = GURL(app.launch_url);
  82   match.allowed_to_be_default_match = true;
  83   match.contents = AutocompleteMatch::SanitizeString(app.name);
  84   AutocompleteMatch::ClassifyLocationInString(name_match_index,
  85       input.text().length(), app.name.length(), ACMatchClassification::NONE,
  86       &match.contents_class);
  87   if (app.should_match_against_launch_url) {
  88     match.description = app.launch_url;
  89     AutocompleteMatch::ClassifyLocationInString(url_match_index,
  90         input.text().length(), app.launch_url.length(),
  91         ACMatchClassification::URL, &match.description_class);
  92   }
  93   match.relevance = CalculateRelevance(
  94       input.type(),
  95       input.text().length(),
  96       name_match_index != string16::npos ?
  97           app.name.length() : app.launch_url.length(),
  98       match.destination_url);
  99   return match;
 100 }
 101
 102 void ExtensionAppProvider::Start(const AutocompleteInput& input,
 103                                  bool minimal_changes) {
 104   matches_.clear();
 105
 106   if ((input.type() == AutocompleteInput::INVALID) ||
 107       (input.type() == AutocompleteInput::FORCED_QUERY))
 108     return;
 109
 110   if (input.text().empty())
 111     return;
 112
 113   for (ExtensionApps::const_iterator app = extension_apps_.begin();
 114        app != extension_apps_.end(); ++app) {
 115     // See if the input matches this extension application.
 116     const string16& name = app->name;
 117     string16::const_iterator name_iter = std::search(name.begin(), name.end(),
 118         input.text().begin(), input.text().end(),
 119         base::CaseInsensitiveCompare<char16>());
 120     bool matches_name = name_iter != name.end();
 121     size_t name_match_index = matches_name ?
 122         static_cast<size_t>(name_iter - name.begin()) : string16::npos;
 123
 124     bool matches_url = false;
 125     size_t url_match_index = string16::npos;
 126     if (app->should_match_against_launch_url) {
 127       const string16& url = app->launch_url;
 128       string16::const_iterator url_iter = std::search(url.begin(), url.end(),
 129           input.text().begin(), input.text().end(),
 130           base::CaseInsensitiveCompare<char16>());
 131       matches_url = url_iter != url.end() &&
 132           input.type() != AutocompleteInput::FORCED_QUERY;
 133       url_match_index = matches_url ?
 134           static_cast<size_t>(url_iter - url.begin()) : string16::npos;
 135     }
 136
 137     if (matches_name || matches_url) {
 138       // We have a match, might be a partial match.
 139       matches_.push_back(CreateAutocompleteMatch(
 140           input, *app, name_match_index, url_match_index));
 141     }
 142   }
 143 }
 144
 145 ExtensionAppProvider::~ExtensionAppProvider() {
 146 }
 147
 148 void ExtensionAppProvider::RefreshAppList() {
 149   ExtensionService* extension_service =
 150       extensions::ExtensionSystemFactory::GetForProfile(profile_)->
 151       extension_service();
 152   if (!extension_service)
 153     return;  // During testing, there is no extension service.
 154   const ExtensionSet* extensions = extension_service->extensions();
 155   extension_apps_.clear();
 156   for (ExtensionSet::const_iterator iter = extensions->begin();
 157        iter != extensions->end(); ++iter) {
 158     const extensions::Extension* app = iter->get();
 159     if (!app->ShouldDisplayInAppLauncher())
 160       continue;
 161     // Note: Apps that appear in the NTP only are not added here since this
 162     // provider is currently only used in the app launcher.
 163
 164     if (profile_->IsOffTheRecord() &&
 165         !extension_util::CanLoadInIncognito(app, extension_service))
 166       continue;
 167
 168     GURL launch_url = app->is_platform_app() ?
 169         app->url() : extensions::AppLaunchInfo::GetFullLaunchURL(app);
 170     DCHECK(launch_url.is_valid());
 171
 172     ExtensionApp extension_app = {
 173         UTF8ToUTF16(app->name()),
 174         UTF8ToUTF16(launch_url.spec()),
 175         // Only hosted apps have recognizable URLs that users might type in,
 176         // packaged apps and hosted apps use chrome-extension:// URLs that are
 177         // normally not shown to users.
 178         app->is_hosted_app()
 179     };
 180     extension_apps_.push_back(extension_app);
 181   }
 182 }
 183
 184 void ExtensionAppProvider::Observe(int type,
 185                                    const content::NotificationSource& source,
 186                                    const content::NotificationDetails& details) {
 187   RefreshAppList();
 188 }
 189
 190 int ExtensionAppProvider::CalculateRelevance(AutocompleteInput::Type type,
 191                                              int input_length,
 192                                              int target_length,
 193                                              const GURL& url) {
 194   // If you update the algorithm here, please remember to update the tables in
 195   // autocomplete.h also.
 196   const int kMaxRelevance = 1425;
 197
 198   if (input_length == target_length)
 199     return kMaxRelevance;
 200
 201   // We give a boost proportionally based on how much of the input matches the
 202   // app name, up to a maximum close to 200 (we can be close to, but we'll never
 203   // reach 200 because the 100% match is taken care of above).
 204   double fraction_boost = static_cast<double>(200) *
 205                           input_length / target_length;
 206
 207   // We also give a boost relative to how often the user has previously typed
 208   // the Extension App URL/selected the Extension App suggestion from this
 209   // provider (boost is between 200-400).
 210   double type_count_boost = 0;
 211   HistoryService* const history_service =
 212       HistoryServiceFactory::GetForProfile(profile_, Profile::EXPLICIT_ACCESS);
 213   history::URLDatabase* url_db = history_service ?
 214       history_service->InMemoryDatabase() : NULL;
 215   if (url_db) {
 216     history::URLRow info;
 217     url_db->GetRowForURL(url, &info);
 218     type_count_boost =
 219         400 * (1.0 - (std::pow(static_cast<double>(2), -info.typed_count())));
 220   }
 221   int relevance = 575 + static_cast<int>(type_count_boost) +
 222                         static_cast<int>(fraction_boost);
 223   DCHECK_LE(relevance, kMaxRelevance);
 224   return relevance;
 225 }