ui/app_list/search_controller.cc

   1 // Copyright 2013 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 "ui/app_list/search_controller.h"
   6
   7 #include <algorithm>
   8 #include <vector>
   9
  10 #include "base/bind.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "base/metrics/histogram_macros.h"
  13 #include "base/metrics/user_metrics.h"
  14 #include "base/strings/string_util.h"
  15 #include "base/strings/utf_string_conversions.h"
  16 #include "ui/app_list/app_list_constants.h"
  17 #include "ui/app_list/search/history.h"
  18 #include "ui/app_list/search_box_model.h"
  19 #include "ui/app_list/search_provider.h"
  20 #include "ui/app_list/search_result.h"
  21
  22 namespace {
  23
  24 // Maximum time (in milliseconds) to wait to the search providers to finish.
  25 const int kStopTimeMS = 1500;
  26 }
  27
  28 namespace app_list {
  29
  30 SearchController::SearchController(SearchBoxModel* search_box,
  31                                    AppListModel::SearchResults* results,
  32                                    History* history)
  33     : search_box_(search_box),
  34       dispatching_query_(false),
  35       mixer_(new Mixer(results)),
  36       history_(history),
  37       is_voice_query_(false) {
  38   mixer_->Init();
  39 }
  40
  41 SearchController::~SearchController() {
  42 }
  43
  44 void SearchController::Start(bool is_voice_query) {
  45   Stop();
  46
  47   base::string16 query;
  48   base::TrimWhitespace(search_box_->text(), base::TRIM_ALL, &query);
  49
  50   dispatching_query_ = true;
  51   for (Providers::iterator it = providers_.begin();
  52        it != providers_.end();
  53        ++it) {
  54     (*it)->Start(is_voice_query, query);
  55   }
  56   dispatching_query_ = false;
  57
  58   is_voice_query_ = is_voice_query;
  59
  60   OnResultsChanged();
  61
  62   stop_timer_.Start(FROM_HERE,
  63                     base::TimeDelta::FromMilliseconds(kStopTimeMS),
  64                     base::Bind(&SearchController::Stop,
  65                                base::Unretained(this)));
  66 }
  67
  68 void SearchController::Stop() {
  69   stop_timer_.Stop();
  70
  71   for (Providers::iterator it = providers_.begin();
  72        it != providers_.end();
  73        ++it) {
  74     (*it)->Stop();
  75   }
  76 }
  77
  78 void SearchController::OpenResult(SearchResult* result, int event_flags) {
  79   // Count AppList.Search here because it is composed of search + action.
  80   base::RecordAction(base::UserMetricsAction("AppList_Search"));
  81
  82   UMA_HISTOGRAM_ENUMERATION(kSearchResultOpenDisplayTypeHistogram,
  83                             result->display_type(),
  84                             SearchResult::DISPLAY_TYPE_LAST);
  85
  86   result->Open(event_flags);
  87
  88   if (history_ && history_->IsReady()) {
  89     history_->AddLaunchEvent(base::UTF16ToUTF8(search_box_->text()),
  90                              result->id());
  91   }
  92 }
  93
  94 void SearchController::InvokeResultAction(SearchResult* result,
  95                                           int action_index,
  96                                           int event_flags) {
  97   // TODO(xiyuan): Hook up with user learning.
  98   result->InvokeAction(action_index, event_flags);
  99 }
 100
 101 void SearchController::AddProvider(Mixer::GroupId group,
 102                                    scoped_ptr<SearchProvider> provider) {
 103   provider->set_result_changed_callback(base::Bind(
 104       &SearchController::OnResultsChanged,
 105       base::Unretained(this)));
 106   mixer_->AddProviderToGroup(group, provider.get());
 107   providers_.push_back(provider.release());  // Takes ownership.
 108 }
 109
 110 void SearchController::OnResultsChanged() {
 111   if (dispatching_query_)
 112     return;
 113
 114   KnownResults known_results;
 115   if (history_ && history_->IsReady()) {
 116     history_->GetKnownResults(base::UTF16ToUTF8(search_box_->text()))
 117         ->swap(known_results);
 118   }
 119
 120   mixer_->MixAndPublish(is_voice_query_, known_results);
 121 }
 122
 123 }  // namespace app_list