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