ash/shell/app_list.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 <string>
   6 #include <vector>
   7
   8 #include "ash/session/session_state_delegate.h"
   9 #include "ash/shell.h"
  10 #include "ash/shell/example_factory.h"
  11 #include "ash/shell/toplevel_window.h"
  12 #include "ash/shell_delegate.h"
  13 #include "base/basictypes.h"
  14 #include "base/callback.h"
  15 #include "base/files/file_path.h"
  16 #include "base/i18n/case_conversion.h"
  17 #include "base/i18n/string_search.h"
  18 #include "base/strings/string_number_conversions.h"
  19 #include "base/strings/string_util.h"
  20 #include "base/strings/utf_string_conversions.h"
  21 #include "ui/app_list/app_list_item.h"
  22 #include "ui/app_list/app_list_item_list.h"
  23 #include "ui/app_list/app_list_model.h"
  24 #include "ui/app_list/app_list_view_delegate.h"
  25 #include "ui/app_list/search_box_model.h"
  26 #include "ui/app_list/search_result.h"
  27 #include "ui/app_list/speech_ui_model.h"
  28 #include "ui/gfx/canvas.h"
  29 #include "ui/gfx/font_list.h"
  30 #include "ui/gfx/geometry/rect.h"
  31 #include "ui/gfx/image/image_skia.h"
  32 #include "ui/views/examples/examples_window_with_content.h"
  33
  34 namespace ash {
  35 namespace shell {
  36
  37 namespace {
  38
  39 // WindowTypeShelfItem is an app item of app list. It carries a window
  40 // launch type and launches corresponding example window when activated.
  41 class WindowTypeShelfItem : public app_list::AppListItem {
  42  public:
  43   enum Type {
  44     TOPLEVEL_WINDOW = 0,
  45     NON_RESIZABLE_WINDOW,
  46     LOCK_SCREEN,
  47     WIDGETS_WINDOW,
  48     EXAMPLES_WINDOW,
  49     LAST_TYPE,
  50   };
  51
  52   WindowTypeShelfItem(const std::string& id, Type type);
  53   ~WindowTypeShelfItem() override;
  54
  55   static gfx::ImageSkia GetIcon(Type type) {
  56     static const SkColor kColors[] = {
  57         SK_ColorRED,
  58         SK_ColorGREEN,
  59         SK_ColorBLUE,
  60         SK_ColorYELLOW,
  61         SK_ColorCYAN,
  62     };
  63
  64     const int kIconSize = 128;
  65     SkBitmap icon;
  66     icon.allocN32Pixels(kIconSize, kIconSize);
  67     icon.eraseColor(kColors[static_cast<int>(type) % arraysize(kColors)]);
  68     return gfx::ImageSkia::CreateFrom1xBitmap(icon);
  69   }
  70
  71   // The text below is not localized as this is an example code.
  72   static std::string GetTitle(Type type) {
  73     switch (type) {
  74       case TOPLEVEL_WINDOW:
  75         return "Create Window";
  76       case NON_RESIZABLE_WINDOW:
  77         return "Create Non-Resizable Window";
  78       case LOCK_SCREEN:
  79         return "Lock Screen";
  80       case WIDGETS_WINDOW:
  81         return "Show Example Widgets";
  82       case EXAMPLES_WINDOW:
  83         return "Open Views Examples Window";
  84       default:
  85         return "Unknown window type.";
  86     }
  87   }
  88
  89   // The text below is not localized as this is an example code.
  90   static std::string GetDetails(Type type) {
  91     // Assigns details only to some types so that we see both one-line
  92     // and two-line results.
  93     switch (type) {
  94       case WIDGETS_WINDOW:
  95         return "Creates a window to show example widgets";
  96       case EXAMPLES_WINDOW:
  97         return "Creates a window to show views example.";
  98       default:
  99         return std::string();
 100     }
 101   }
 102
 103   static void ActivateItem(Type type, int event_flags) {
 104      switch (type) {
 105       case TOPLEVEL_WINDOW: {
 106         ToplevelWindow::CreateParams params;
 107         params.can_resize = true;
 108         ToplevelWindow::CreateToplevelWindow(params);
 109         break;
 110       }
 111       case NON_RESIZABLE_WINDOW: {
 112         ToplevelWindow::CreateToplevelWindow(ToplevelWindow::CreateParams());
 113         break;
 114       }
 115       case LOCK_SCREEN: {
 116         Shell::GetInstance()->session_state_delegate()->LockScreen();
 117         break;
 118       }
 119       case WIDGETS_WINDOW: {
 120         CreateWidgetsWindow();
 121         break;
 122       }
 123       case EXAMPLES_WINDOW: {
 124         views::examples::ShowExamplesWindowWithContent(
 125             views::examples::DO_NOTHING_ON_CLOSE,
 126             Shell::GetInstance()->delegate()->GetActiveBrowserContext(),
 127             NULL);
 128         break;
 129       }
 130       default:
 131         break;
 132     }
 133   }
 134
 135   // AppListItem
 136   void Activate(int event_flags) override { ActivateItem(type_, event_flags); }
 137
 138  private:
 139   Type type_;
 140
 141   DISALLOW_COPY_AND_ASSIGN(WindowTypeShelfItem);
 142 };
 143
 144 WindowTypeShelfItem::WindowTypeShelfItem(const std::string& id, Type type)
 145     : app_list::AppListItem(id), type_(type) {
 146   std::string title(GetTitle(type));
 147   SetIcon(GetIcon(type));
 148   SetName(title);
 149 }
 150
 151 WindowTypeShelfItem::~WindowTypeShelfItem() {
 152 }
 153
 154 // ExampleSearchResult is an app list search result. It provides what icon to
 155 // show, what should title and details text look like. It also carries the
 156 // matching window launch type so that AppListViewDelegate knows how to open
 157 // it.
 158 class ExampleSearchResult : public app_list::SearchResult {
 159  public:
 160   ExampleSearchResult(WindowTypeShelfItem::Type type,
 161                       const base::string16& query)
 162       : type_(type) {
 163     SetIcon(WindowTypeShelfItem::GetIcon(type_));
 164
 165     base::string16 title =
 166         base::UTF8ToUTF16(WindowTypeShelfItem::GetTitle(type_));
 167     set_title(title);
 168
 169     Tags title_tags;
 170     const size_t match_len = query.length();
 171
 172     // Highlight matching parts in title with bold.
 173     // Note the following is not a proper way to handle i18n string.
 174     title = base::i18n::ToLower(title);
 175     size_t match_start = title.find(query);
 176     while (match_start != base::string16::npos) {
 177       title_tags.push_back(Tag(Tag::MATCH,
 178                                match_start,
 179                                match_start + match_len));
 180       match_start = title.find(query, match_start + match_len);
 181     }
 182     set_title_tags(title_tags);
 183
 184     base::string16 details =
 185         base::UTF8ToUTF16(WindowTypeShelfItem::GetDetails(type_));
 186     set_details(details);
 187     Tags details_tags;
 188     details_tags.push_back(Tag(Tag::DIM, 0, details.length()));
 189     set_details_tags(details_tags);
 190   }
 191
 192   WindowTypeShelfItem::Type type() const { return type_; }
 193
 194   // app_list::SearchResult:
 195   scoped_ptr<SearchResult> Duplicate() const override {
 196     return scoped_ptr<SearchResult>();
 197   }
 198
 199  private:
 200   WindowTypeShelfItem::Type type_;
 201
 202   DISALLOW_COPY_AND_ASSIGN(ExampleSearchResult);
 203 };
 204
 205 class ExampleAppListViewDelegate : public app_list::AppListViewDelegate {
 206  public:
 207   ExampleAppListViewDelegate()
 208       : model_(new app_list::AppListModel) {
 209     PopulateApps();
 210     DecorateSearchBox(model_->search_box());
 211   }
 212
 213  private:
 214   void PopulateApps() {
 215     for (int i = 0; i < static_cast<int>(WindowTypeShelfItem::LAST_TYPE); ++i) {
 216       WindowTypeShelfItem::Type type =
 217           static_cast<WindowTypeShelfItem::Type>(i);
 218       std::string id = base::IntToString(i);
 219       scoped_ptr<WindowTypeShelfItem> shelf_item(
 220           new WindowTypeShelfItem(id, type));
 221       model_->AddItem(shelf_item.Pass());
 222     }
 223   }
 224
 225   gfx::ImageSkia CreateSearchBoxIcon() {
 226     const base::string16 icon_text = base::ASCIIToUTF16("ash");
 227     const gfx::Size icon_size(32, 32);
 228
 229     gfx::Canvas canvas(icon_size, 1.0f, false /* is_opaque */);
 230     canvas.DrawStringRectWithFlags(
 231         icon_text,
 232         gfx::FontList(),
 233         SK_ColorBLACK,
 234         gfx::Rect(icon_size),
 235         gfx::Canvas::TEXT_ALIGN_CENTER | gfx::Canvas::NO_SUBPIXEL_RENDERING);
 236
 237     return gfx::ImageSkia(canvas.ExtractImageRep());
 238   }
 239
 240   void DecorateSearchBox(app_list::SearchBoxModel* search_box_model) {
 241     search_box_model->SetIcon(CreateSearchBoxIcon());
 242     search_box_model->SetHintText(base::ASCIIToUTF16("Type to search..."));
 243   }
 244
 245   // Overridden from app_list::AppListViewDelegate:
 246   bool ForceNativeDesktop() const override { return false; }
 247
 248   void SetProfileByPath(const base::FilePath& profile_path) override {
 249     // Nothing needs to be done.
 250   }
 251
 252   const Users& GetUsers() const override { return users_; }
 253
 254   bool ShouldCenterWindow() const override { return false; }
 255
 256   app_list::AppListModel* GetModel() override { return model_.get(); }
 257
 258   app_list::SpeechUIModel* GetSpeechUI() override { return &speech_ui_; }
 259
 260   void GetShortcutPathForApp(
 261       const std::string& app_id,
 262       const base::Callback<void(const base::FilePath&)>& callback) override {
 263     callback.Run(base::FilePath());
 264   }
 265
 266   void OpenSearchResult(app_list::SearchResult* result,
 267                         bool auto_launch,
 268                         int event_flags) override {
 269     const ExampleSearchResult* example_result =
 270         static_cast<const ExampleSearchResult*>(result);
 271     WindowTypeShelfItem::ActivateItem(example_result->type(), event_flags);
 272   }
 273
 274   void InvokeSearchResultAction(app_list::SearchResult* result,
 275                                 int action_index,
 276                                 int event_flags) override {
 277     NOTIMPLEMENTED();
 278   }
 279
 280   base::TimeDelta GetAutoLaunchTimeout() override { return base::TimeDelta(); }
 281
 282   void AutoLaunchCanceled() override {}
 283
 284   void StartSearch() override {
 285     base::string16 query;
 286     base::TrimWhitespace(model_->search_box()->text(), base::TRIM_ALL, &query);
 287     query = base::i18n::ToLower(query);
 288
 289     model_->results()->DeleteAll();
 290     if (query.empty())
 291       return;
 292
 293     for (int i = 0; i < static_cast<int>(WindowTypeShelfItem::LAST_TYPE); ++i) {
 294       WindowTypeShelfItem::Type type =
 295           static_cast<WindowTypeShelfItem::Type>(i);
 296
 297       base::string16 title =
 298           base::UTF8ToUTF16(WindowTypeShelfItem::GetTitle(type));
 299       if (base::i18n::StringSearchIgnoringCaseAndAccents(
 300               query, title, NULL, NULL)) {
 301         model_->results()->Add(new ExampleSearchResult(type, query));
 302       }
 303     }
 304   }
 305
 306   void StopSearch() override {
 307     // Nothing needs to be done.
 308   }
 309
 310   void ViewInitialized() override {
 311     // Nothing needs to be done.
 312   }
 313
 314   void Dismiss() override {
 315     DCHECK(ash::Shell::HasInstance());
 316     Shell::GetInstance()->DismissAppList();
 317   }
 318
 319   void ViewClosing() override {
 320     // Nothing needs to be done.
 321   }
 322
 323   gfx::ImageSkia GetWindowIcon() override { return gfx::ImageSkia(); }
 324
 325   void OpenSettings() override {
 326     // Nothing needs to be done.
 327   }
 328
 329   void OpenHelp() override {
 330     // Nothing needs to be done.
 331   }
 332
 333   void OpenFeedback() override {
 334     // Nothing needs to be done.
 335   }
 336
 337   void ToggleSpeechRecognition() override { NOTIMPLEMENTED(); }
 338
 339   void ShowForProfileByPath(const base::FilePath& profile_path) override {
 340     // Nothing needs to be done.
 341   }
 342
 343   views::View* CreateStartPageWebView(const gfx::Size& size) override {
 344     return NULL;
 345   }
 346
 347   std::vector<views::View*> CreateCustomPageWebViews(
 348       const gfx::Size& size) override {
 349     return std::vector<views::View*>();
 350   }
 351
 352   void CustomLauncherPageAnimationChanged(double progress) override {}
 353
 354   void CustomLauncherPagePopSubpage() override {}
 355
 356   bool IsSpeechRecognitionEnabled() override { return false; }
 357
 358   scoped_ptr<app_list::AppListModel> model_;
 359   app_list::SpeechUIModel speech_ui_;
 360   Users users_;
 361
 362   DISALLOW_COPY_AND_ASSIGN(ExampleAppListViewDelegate);
 363 };
 364
 365 }  // namespace
 366
 367 app_list::AppListViewDelegate* CreateAppListViewDelegate() {
 368   return new ExampleAppListViewDelegate;
 369 }
 370
 371 }  // namespace shell
 372 }  // namespace ash