src/ui/app_list/views/search_result_list_view.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 "ui/app_list/views/search_result_list_view.h"
   6
   7 #include <algorithm>
   8
   9 #include "base/bind.h"
  10 #include "base/message_loop/message_loop.h"
  11 #include "base/time/time.h"
  12 #include "third_party/skia/include/core/SkColor.h"
  13 #include "ui/app_list/app_list_switches.h"
  14 #include "ui/app_list/app_list_view_delegate.h"
  15 #include "ui/app_list/search_result.h"
  16 #include "ui/app_list/views/search_result_list_view_delegate.h"
  17 #include "ui/app_list/views/search_result_view.h"
  18 #include "ui/events/event.h"
  19 #include "ui/gfx/animation/linear_animation.h"
  20 #include "ui/views/background.h"
  21 #include "ui/views/layout/box_layout.h"
  22
  23 namespace {
  24
  25 const int kMaxResults = 6;
  26 const int kExperimentAppListMaxResults = 3;
  27 const int kTimeoutIndicatorHeight = 2;
  28 const int kTimeoutFramerate = 60;
  29 const SkColor kTimeoutIndicatorColor = SkColorSetRGB(30, 144, 255);
  30
  31 }  // namespace
  32
  33 namespace app_list {
  34
  35 SearchResultListView::SearchResultListView(
  36     SearchResultListViewDelegate* delegate,
  37     AppListViewDelegate* view_delegate)
  38     : delegate_(delegate),
  39       view_delegate_(view_delegate),
  40       results_(NULL),
  41       results_container_(new views::View),
  42       auto_launch_indicator_(new views::View),
  43       last_visible_index_(0),
  44       selected_index_(-1),
  45       update_factory_(this) {
  46   results_container_->SetLayoutManager(
  47       new views::BoxLayout(views::BoxLayout::kVertical, 0, 0, 0));
  48
  49   int max_results = kMaxResults;
  50   if (app_list::switches::IsExperimentalAppListEnabled())
  51     max_results = kExperimentAppListMaxResults;
  52
  53   for (int i = 0; i < max_results; ++i)
  54     results_container_->AddChildView(new SearchResultView(this));
  55   AddChildView(results_container_);
  56
  57   auto_launch_indicator_->set_background(
  58       views::Background::CreateSolidBackground(kTimeoutIndicatorColor));
  59   auto_launch_indicator_->SetVisible(false);
  60
  61   AddChildView(auto_launch_indicator_);
  62 }
  63
  64 SearchResultListView::~SearchResultListView() {
  65   if (results_)
  66     results_->RemoveObserver(this);
  67 }
  68
  69 void SearchResultListView::SetResults(AppListModel::SearchResults* results) {
  70   if (results_)
  71     results_->RemoveObserver(this);
  72
  73   results_ = results;
  74   if (results_)
  75     results_->AddObserver(this);
  76
  77   Update();
  78 }
  79
  80 void SearchResultListView::SetSelectedIndex(int selected_index) {
  81   if (selected_index_ == selected_index)
  82     return;
  83
  84   if (selected_index_ >= 0) {
  85     SearchResultView* selected_view  = GetResultViewAt(selected_index_);
  86     selected_view->ClearSelectedAction();
  87     selected_view->SchedulePaint();
  88   }
  89
  90   selected_index_ = selected_index;
  91
  92   if (selected_index_ >= 0) {
  93     SearchResultView* selected_view  = GetResultViewAt(selected_index_);
  94     selected_view->ClearSelectedAction();
  95     selected_view->SchedulePaint();
  96     selected_view->NotifyAccessibilityEvent(ui::AX_EVENT_FOCUS,
  97                                             true);
  98   }
  99   if (auto_launch_animation_)
 100     CancelAutoLaunchTimeout();
 101 }
 102
 103 bool SearchResultListView::IsResultViewSelected(
 104     const SearchResultView* result_view) const {
 105   if (selected_index_ < 0)
 106     return false;
 107
 108   return static_cast<const SearchResultView*>(
 109       results_container_->child_at(selected_index_)) == result_view;
 110 }
 111
 112 void SearchResultListView::UpdateAutoLaunchState() {
 113   SetAutoLaunchTimeout(view_delegate_->GetAutoLaunchTimeout());
 114 }
 115
 116 bool SearchResultListView::OnKeyPressed(const ui::KeyEvent& event) {
 117   if (selected_index_ >= 0 &&
 118       results_container_->child_at(selected_index_)->OnKeyPressed(event)) {
 119     return true;
 120   }
 121
 122   switch (event.key_code()) {
 123     case ui::VKEY_TAB:
 124       if (event.IsShiftDown())
 125         SetSelectedIndex(std::max(selected_index_ - 1, 0));
 126       else
 127         SetSelectedIndex(std::min(selected_index_ + 1, last_visible_index_));
 128       return true;
 129     case ui::VKEY_UP:
 130       SetSelectedIndex(std::max(selected_index_ - 1, 0));
 131       return true;
 132     case ui::VKEY_DOWN:
 133       SetSelectedIndex(std::min(selected_index_ + 1, last_visible_index_));
 134       return true;
 135     default:
 136       break;
 137   }
 138
 139   return false;
 140 }
 141
 142 void SearchResultListView::SetAutoLaunchTimeout(
 143     const base::TimeDelta& timeout) {
 144   if (timeout > base::TimeDelta()) {
 145     auto_launch_indicator_->SetVisible(true);
 146     auto_launch_indicator_->SetBounds(0, 0, 0, kTimeoutIndicatorHeight);
 147     auto_launch_animation_.reset(new gfx::LinearAnimation(
 148         timeout.InMilliseconds(), kTimeoutFramerate, this));
 149     auto_launch_animation_->Start();
 150   } else {
 151     auto_launch_indicator_->SetVisible(false);
 152     auto_launch_animation_.reset();
 153   }
 154 }
 155
 156 void SearchResultListView::CancelAutoLaunchTimeout() {
 157   SetAutoLaunchTimeout(base::TimeDelta());
 158   view_delegate_->AutoLaunchCanceled();
 159 }
 160
 161 SearchResultView* SearchResultListView::GetResultViewAt(int index) {
 162   DCHECK(index >= 0 && index < results_container_->child_count());
 163   return static_cast<SearchResultView*>(results_container_->child_at(index));
 164 }
 165
 166 void SearchResultListView::Update() {
 167   std::vector<SearchResult*> display_results =
 168       AppListModel::FilterSearchResultsByDisplayType(
 169           results_,
 170           SearchResult::DISPLAY_LIST,
 171           results_container_->child_count());
 172   last_visible_index_ = display_results.size() - 1;
 173
 174   for (size_t i = 0; i < static_cast<size_t>(results_container_->child_count());
 175        ++i) {
 176     SearchResultView* result_view = GetResultViewAt(i);
 177     if (i < display_results.size()) {
 178       result_view->SetResult(display_results[i]);
 179       result_view->SetVisible(true);
 180     } else {
 181       result_view->SetResult(NULL);
 182       result_view->SetVisible(false);
 183     }
 184   }
 185   if (selected_index_ > last_visible_index_)
 186     SetSelectedIndex(last_visible_index_);
 187
 188   Layout();
 189   update_factory_.InvalidateWeakPtrs();
 190   UpdateAutoLaunchState();
 191 }
 192
 193 void SearchResultListView::ScheduleUpdate() {
 194   // When search results are added one by one, each addition generates an update
 195   // request. Consolidates those update requests into one Update call.
 196   if (!update_factory_.HasWeakPtrs()) {
 197     base::MessageLoop::current()->PostTask(
 198         FROM_HERE,
 199         base::Bind(&SearchResultListView::Update,
 200                    update_factory_.GetWeakPtr()));
 201   }
 202 }
 203
 204 void SearchResultListView::ForceAutoLaunchForTest() {
 205   if (auto_launch_animation_)
 206     AnimationEnded(auto_launch_animation_.get());
 207 }
 208
 209 void SearchResultListView::Layout() {
 210   results_container_->SetBoundsRect(GetLocalBounds());
 211 }
 212
 213 gfx::Size SearchResultListView::GetPreferredSize() const {
 214   return results_container_->GetPreferredSize();
 215 }
 216
 217 int SearchResultListView::GetHeightForWidth(int w) const {
 218   return results_container_->GetHeightForWidth(w);
 219 }
 220
 221 void SearchResultListView::VisibilityChanged(views::View* starting_from,
 222                                              bool is_visible) {
 223   if (is_visible)
 224     UpdateAutoLaunchState();
 225   else
 226     CancelAutoLaunchTimeout();
 227 }
 228
 229 void SearchResultListView::AnimationEnded(const gfx::Animation* animation) {
 230   DCHECK_EQ(auto_launch_animation_.get(), animation);
 231   view_delegate_->OpenSearchResult(results_->GetItemAt(0), true, ui::EF_NONE);
 232
 233   // The auto-launch has to be canceled explicitly. Think that one of searcher
 234   // is extremely slow. Sometimes the events would happen in the following
 235   // order:
 236   //  1. The search results arrive, auto-launch is dispatched
 237   //  2. Timed out and auto-launch the first search result
 238   //  3. Then another searcher adds search results more
 239   // At the step 3, we shouldn't dispatch the auto-launch again.
 240   CancelAutoLaunchTimeout();
 241 }
 242
 243 void SearchResultListView::AnimationProgressed(
 244     const gfx::Animation* animation) {
 245   DCHECK_EQ(auto_launch_animation_.get(), animation);
 246   int indicator_width = auto_launch_animation_->CurrentValueBetween(0, width());
 247   auto_launch_indicator_->SetBounds(
 248       0, 0, indicator_width, kTimeoutIndicatorHeight);
 249 }
 250
 251 void SearchResultListView::ListItemsAdded(size_t start, size_t count) {
 252   ScheduleUpdate();
 253 }
 254
 255 void SearchResultListView::ListItemsRemoved(size_t start, size_t count) {
 256   size_t last = std::min(
 257       start + count,
 258       static_cast<size_t>(results_container_->child_count()));
 259   for (size_t i = start; i < last; ++i)
 260     GetResultViewAt(i)->ClearResultNoRepaint();
 261
 262   ScheduleUpdate();
 263 }
 264
 265 void SearchResultListView::ListItemMoved(size_t index, size_t target_index) {
 266   NOTREACHED();
 267 }
 268
 269 void SearchResultListView::ListItemsChanged(size_t start, size_t count) {
 270   NOTREACHED();
 271 }
 272
 273 void SearchResultListView::SearchResultActivated(SearchResultView* view,
 274                                                  int event_flags) {
 275   if (view_delegate_ && view->result())
 276     view_delegate_->OpenSearchResult(view->result(), false, event_flags);
 277 }
 278
 279 void SearchResultListView::SearchResultActionActivated(SearchResultView* view,
 280                                                        size_t action_index,
 281                                                        int event_flags) {
 282   if (view_delegate_ && view->result()) {
 283     view_delegate_->InvokeSearchResultAction(
 284         view->result(), action_index, event_flags);
 285   }
 286 }
 287
 288 void SearchResultListView::OnSearchResultInstalled(SearchResultView* view) {
 289   if (delegate_ && view->result())
 290     delegate_->OnResultInstalled(view->result());
 291 }
 292
 293 void SearchResultListView::OnSearchResultUninstalled(SearchResultView* view) {
 294   if (delegate_ && view->result())
 295     delegate_->OnResultUninstalled(view->result());
 296 }
 297
 298 }  // namespace app_list