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 #include <vector>
   9
  10 #include "base/bind.h"
  11 #include "base/message_loop/message_loop.h"
  12 #include "base/time/time.h"
  13 #include "third_party/skia/include/core/SkColor.h"
  14 #include "ui/app_list/app_list_switches.h"
  15 #include "ui/app_list/app_list_view_delegate.h"
  16 #include "ui/app_list/search_result.h"
  17 #include "ui/app_list/views/search_result_list_view_delegate.h"
  18 #include "ui/app_list/views/search_result_view.h"
  19 #include "ui/events/event.h"
  20 #include "ui/gfx/animation/linear_animation.h"
  21 #include "ui/views/background.h"
  22 #include "ui/views/layout/box_layout.h"
  23
  24 namespace {
  25
  26 const int kMaxResults = 6;
  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_container_(new views::View),
  41       auto_launch_indicator_(new views::View) {
  42   results_container_->SetLayoutManager(
  43       new views::BoxLayout(views::BoxLayout::kVertical, 0, 0, 0));
  44
  45   for (int i = 0; i < kMaxResults; ++i)
  46     results_container_->AddChildView(new SearchResultView(this));
  47   AddChildView(results_container_);
  48
  49   auto_launch_indicator_->set_background(
  50       views::Background::CreateSolidBackground(kTimeoutIndicatorColor));
  51   auto_launch_indicator_->SetVisible(false);
  52
  53   AddChildView(auto_launch_indicator_);
  54 }
  55
  56 SearchResultListView::~SearchResultListView() {
  57 }
  58
  59 bool SearchResultListView::IsResultViewSelected(
  60     const SearchResultView* result_view) const {
  61   if (selected_index() < 0)
  62     return false;
  63
  64   return static_cast<const SearchResultView*>(
  65              results_container_->child_at(selected_index())) == result_view;
  66 }
  67
  68 void SearchResultListView::UpdateAutoLaunchState() {
  69   SetAutoLaunchTimeout(view_delegate_->GetAutoLaunchTimeout());
  70 }
  71
  72 bool SearchResultListView::OnKeyPressed(const ui::KeyEvent& event) {
  73   if (selected_index() >= 0 &&
  74       results_container_->child_at(selected_index())->OnKeyPressed(event)) {
  75     return true;
  76   }
  77
  78   int selection_index = -1;
  79   switch (event.key_code()) {
  80     case ui::VKEY_TAB:
  81       if (event.IsShiftDown())
  82         selection_index = selected_index() - 1;
  83       else
  84         selection_index = selected_index() + 1;
  85       break;
  86     case ui::VKEY_UP:
  87       selection_index = selected_index() - 1;
  88       break;
  89     case ui::VKEY_DOWN:
  90       selection_index = selected_index() + 1;
  91       break;
  92     default:
  93       break;
  94   }
  95
  96   if (IsValidSelectionIndex(selection_index)) {
  97     SetSelectedIndex(selection_index);
  98     if (auto_launch_animation_)
  99       CancelAutoLaunchTimeout();
 100     return true;
 101   }
 102
 103   return false;
 104 }
 105
 106 void SearchResultListView::SetAutoLaunchTimeout(
 107     const base::TimeDelta& timeout) {
 108   if (timeout > base::TimeDelta()) {
 109     auto_launch_indicator_->SetVisible(true);
 110     auto_launch_indicator_->SetBounds(0, 0, 0, kTimeoutIndicatorHeight);
 111     auto_launch_animation_.reset(new gfx::LinearAnimation(
 112         timeout.InMilliseconds(), kTimeoutFramerate, this));
 113     auto_launch_animation_->Start();
 114   } else {
 115     auto_launch_indicator_->SetVisible(false);
 116     auto_launch_animation_.reset();
 117   }
 118 }
 119
 120 void SearchResultListView::CancelAutoLaunchTimeout() {
 121   SetAutoLaunchTimeout(base::TimeDelta());
 122   view_delegate_->AutoLaunchCanceled();
 123 }
 124
 125 SearchResultView* SearchResultListView::GetResultViewAt(int index) {
 126   DCHECK(index >= 0 && index < results_container_->child_count());
 127   return static_cast<SearchResultView*>(results_container_->child_at(index));
 128 }
 129
 130 void SearchResultListView::ListItemsRemoved(size_t start, size_t count) {
 131   size_t last = std::min(
 132       start + count, static_cast<size_t>(results_container_->child_count()));
 133   for (size_t i = start; i < last; ++i)
 134     GetResultViewAt(i)->ClearResultNoRepaint();
 135
 136   SearchResultContainerView::ListItemsRemoved(start, count);
 137 }
 138
 139 void SearchResultListView::OnContainerSelected(bool from_bottom,
 140                                                bool /*directional_movement*/) {
 141   if (num_results() == 0)
 142     return;
 143
 144   SetSelectedIndex(from_bottom ? num_results() - 1 : 0);
 145 }
 146
 147 int SearchResultListView::Update() {
 148   std::vector<SearchResult*> display_results =
 149       AppListModel::FilterSearchResultsByDisplayType(
 150           results(),
 151           SearchResult::DISPLAY_LIST,
 152           results_container_->child_count());
 153
 154   for (size_t i = 0; i < static_cast<size_t>(results_container_->child_count());
 155        ++i) {
 156     SearchResultView* result_view = GetResultViewAt(i);
 157     result_view->set_is_last_result(i == display_results.size() - 1);
 158     if (i < display_results.size()) {
 159       result_view->SetResult(display_results[i]);
 160       result_view->SetVisible(true);
 161     } else {
 162       result_view->SetResult(NULL);
 163       result_view->SetVisible(false);
 164     }
 165   }
 166   UpdateAutoLaunchState();
 167
 168   set_container_score(
 169       display_results.empty() ? 0 : display_results.front()->relevance());
 170
 171   return display_results.size();
 172 }
 173
 174 void SearchResultListView::UpdateSelectedIndex(int old_selected,
 175                                                int new_selected) {
 176   if (old_selected >= 0) {
 177     SearchResultView* selected_view = GetResultViewAt(old_selected);
 178     selected_view->ClearSelectedAction();
 179     selected_view->SchedulePaint();
 180   }
 181
 182   if (new_selected >= 0) {
 183     SearchResultView* selected_view = GetResultViewAt(new_selected);
 184     selected_view->ClearSelectedAction();
 185     selected_view->SchedulePaint();
 186     selected_view->NotifyAccessibilityEvent(ui::AX_EVENT_FOCUS, true);
 187   }
 188 }
 189
 190 void SearchResultListView::ForceAutoLaunchForTest() {
 191   if (auto_launch_animation_)
 192     AnimationEnded(auto_launch_animation_.get());
 193 }
 194
 195 void SearchResultListView::Layout() {
 196   results_container_->SetBoundsRect(GetLocalBounds());
 197 }
 198
 199 gfx::Size SearchResultListView::GetPreferredSize() const {
 200   return results_container_->GetPreferredSize();
 201 }
 202
 203 int SearchResultListView::GetHeightForWidth(int w) const {
 204   return results_container_->GetHeightForWidth(w);
 205 }
 206
 207 void SearchResultListView::VisibilityChanged(views::View* starting_from,
 208                                              bool is_visible) {
 209   if (is_visible)
 210     UpdateAutoLaunchState();
 211   else
 212     CancelAutoLaunchTimeout();
 213 }
 214
 215 void SearchResultListView::AnimationEnded(const gfx::Animation* animation) {
 216   DCHECK_EQ(auto_launch_animation_.get(), animation);
 217   view_delegate_->OpenSearchResult(results()->GetItemAt(0), true, ui::EF_NONE);
 218
 219   // The auto-launch has to be canceled explicitly. Think that one of searcher
 220   // is extremely slow. Sometimes the events would happen in the following
 221   // order:
 222   //  1. The search results arrive, auto-launch is dispatched
 223   //  2. Timed out and auto-launch the first search result
 224   //  3. Then another searcher adds search results more
 225   // At the step 3, we shouldn't dispatch the auto-launch again.
 226   CancelAutoLaunchTimeout();
 227 }
 228
 229 void SearchResultListView::AnimationProgressed(
 230     const gfx::Animation* animation) {
 231   DCHECK_EQ(auto_launch_animation_.get(), animation);
 232   int indicator_width = auto_launch_animation_->CurrentValueBetween(0, width());
 233   auto_launch_indicator_->SetBounds(
 234       0, 0, indicator_width, kTimeoutIndicatorHeight);
 235 }
 236
 237 void SearchResultListView::SearchResultActivated(SearchResultView* view,
 238                                                  int event_flags) {
 239   if (view_delegate_ && view->result())
 240     view_delegate_->OpenSearchResult(view->result(), false, event_flags);
 241 }
 242
 243 void SearchResultListView::SearchResultActionActivated(SearchResultView* view,
 244                                                        size_t action_index,
 245                                                        int event_flags) {
 246   if (view_delegate_ && view->result()) {
 247     view_delegate_->InvokeSearchResultAction(
 248         view->result(), action_index, event_flags);
 249   }
 250 }
 251
 252 void SearchResultListView::OnSearchResultInstalled(SearchResultView* view) {
 253   if (delegate_ && view->result())
 254     delegate_->OnResultInstalled(view->result());
 255 }
 256
 257 }  // namespace app_list