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      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 
      7 #include "ash/session/session_state_delegate.h"
      8 #include "ash/shell.h"
      9 #include "ash/shell/example_factory.h"
     10 #include "ash/shell/toplevel_window.h"
     11 #include "ash/shell_delegate.h"
     12 #include "base/basictypes.h"
     13 #include "base/callback.h"
     14 #include "base/files/file_path.h"
     15 #include "base/i18n/case_conversion.h"
     16 #include "base/i18n/string_search.h"
     17 #include "base/strings/string_util.h"
     18 #include "base/strings/stringprintf.h"
     19 #include "base/strings/utf_string_conversions.h"
     20 #include "ui/app_list/app_list_item.h"
     21 #include "ui/app_list/app_list_item_list.h"
     22 #include "ui/app_list/app_list_model.h"
     23 #include "ui/app_list/app_list_view_delegate.h"
     24 #include "ui/app_list/search_box_model.h"
     25 #include "ui/app_list/search_result.h"
     26 #include "ui/app_list/speech_ui_model.h"
     27 #include "ui/gfx/canvas.h"
     28 #include "ui/gfx/font_list.h"
     29 #include "ui/gfx/geometry/rect.h"
     30 #include "ui/gfx/image/image_skia.h"
     31 #include "ui/views/examples/examples_window_with_content.h"
     32 
     33 namespace ash {
     34 namespace shell {
     35 
     36 namespace {
     37 
     38 // WindowTypeShelfItem is an app item of app list. It carries a window
     39 // launch type and launches corresponding example window when activated.
     40 class WindowTypeShelfItem : public app_list::AppListItem {
     41  public:
     42   enum Type {
     43     TOPLEVEL_WINDOW = 0,
     44     NON_RESIZABLE_WINDOW,
     45     LOCK_SCREEN,
     46     WIDGETS_WINDOW,
     47     EXAMPLES_WINDOW,
     48     LAST_TYPE,
     49   };
     50 
     51   explicit WindowTypeShelfItem(const std::string& id, Type type)
     52       : app_list::AppListItem(id),
     53         type_(type) {
     54     std::string title(GetTitle(type));
     55     SetIcon(GetIcon(type), false);
     56     SetName(title);
     57   }
     58 
     59   static gfx::ImageSkia GetIcon(Type type) {
     60     static const SkColor kColors[] = {
     61         SK_ColorRED,
     62         SK_ColorGREEN,
     63         SK_ColorBLUE,
     64         SK_ColorYELLOW,
     65         SK_ColorCYAN,
     66     };
     67 
     68     const int kIconSize = 128;
     69     SkBitmap icon;
     70     icon.setConfig(SkBitmap::kARGB_8888_Config, kIconSize, kIconSize);
     71     icon.allocPixels();
     72     icon.eraseColor(kColors[static_cast<int>(type) % arraysize(kColors)]);
     73     return gfx::ImageSkia::CreateFrom1xBitmap(icon);
     74   }
     75 
     76   // The text below is not localized as this is an example code.
     77   static std::string GetTitle(Type type) {
     78     switch (type) {
     79       case TOPLEVEL_WINDOW:
     80         return "Create Window";
     81       case NON_RESIZABLE_WINDOW:
     82         return "Create Non-Resizable Window";
     83       case LOCK_SCREEN:
     84         return "Lock Screen";
     85       case WIDGETS_WINDOW:
     86         return "Show Example Widgets";
     87       case EXAMPLES_WINDOW:
     88         return "Open Views Examples Window";
     89       default:
     90         return "Unknown window type.";
     91     }
     92   }
     93 
     94   // The text below is not localized as this is an example code.
     95   static std::string GetDetails(Type type) {
     96     // Assigns details only to some types so that we see both one-line
     97     // and two-line results.
     98     switch (type) {
     99       case WIDGETS_WINDOW:
    100         return "Creates a window to show example widgets";
    101       case EXAMPLES_WINDOW:
    102         return "Creates a window to show views example.";
    103       default:
    104         return std::string();
    105     }
    106   }
    107 
    108   static void ActivateItem(Type type, int event_flags) {
    109      switch (type) {
    110       case TOPLEVEL_WINDOW: {
    111         ToplevelWindow::CreateParams params;
    112         params.can_resize = true;
    113         ToplevelWindow::CreateToplevelWindow(params);
    114         break;
    115       }
    116       case NON_RESIZABLE_WINDOW: {
    117         ToplevelWindow::CreateToplevelWindow(ToplevelWindow::CreateParams());
    118         break;
    119       }
    120       case LOCK_SCREEN: {
    121         Shell::GetInstance()->session_state_delegate()->LockScreen();
    122         break;
    123       }
    124       case WIDGETS_WINDOW: {
    125         CreateWidgetsWindow();
    126         break;
    127       }
    128       case EXAMPLES_WINDOW: {
    129         views::examples::ShowExamplesWindowWithContent(
    130             views::examples::DO_NOTHING_ON_CLOSE,
    131             Shell::GetInstance()->delegate()->GetActiveBrowserContext(),
    132             NULL);
    133         break;
    134       }
    135       default:
    136         break;
    137     }
    138   }
    139 
    140   // AppListItem
    141   virtual void Activate(int event_flags) OVERRIDE {
    142     ActivateItem(type_, event_flags);
    143   }
    144 
    145  private:
    146   Type type_;
    147 
    148   DISALLOW_COPY_AND_ASSIGN(WindowTypeShelfItem);
    149 };
    150 
    151 // ExampleSearchResult is an app list search result. It provides what icon to
    152 // show, what should title and details text look like. It also carries the
    153 // matching window launch type so that AppListViewDelegate knows how to open
    154 // it.
    155 class ExampleSearchResult : public app_list::SearchResult {
    156  public:
    157   ExampleSearchResult(WindowTypeShelfItem::Type type,
    158                       const base::string16& query)
    159       : type_(type) {
    160     SetIcon(WindowTypeShelfItem::GetIcon(type_));
    161 
    162     base::string16 title =
    163         base::UTF8ToUTF16(WindowTypeShelfItem::GetTitle(type_));
    164     set_title(title);
    165 
    166     Tags title_tags;
    167     const size_t match_len = query.length();
    168 
    169     // Highlight matching parts in title with bold.
    170     // Note the following is not a proper way to handle i18n string.
    171     title = base::i18n::ToLower(title);
    172     size_t match_start = title.find(query);
    173     while (match_start != base::string16::npos) {
    174       title_tags.push_back(Tag(Tag::MATCH,
    175                                match_start,
    176                                match_start + match_len));
    177       match_start = title.find(query, match_start + match_len);
    178     }
    179     set_title_tags(title_tags);
    180 
    181     base::string16 details =
    182         base::UTF8ToUTF16(WindowTypeShelfItem::GetDetails(type_));
    183     set_details(details);
    184     Tags details_tags;
    185     details_tags.push_back(Tag(Tag::DIM, 0, details.length()));
    186     set_details_tags(details_tags);
    187   }
    188 
    189   WindowTypeShelfItem::Type type() const { return type_; }
    190 
    191  private:
    192   WindowTypeShelfItem::Type type_;
    193 
    194   DISALLOW_COPY_AND_ASSIGN(ExampleSearchResult);
    195 };
    196 
    197 class ExampleAppListViewDelegate : public app_list::AppListViewDelegate {
    198  public:
    199   ExampleAppListViewDelegate()
    200       : model_(new app_list::AppListModel),
    201         speech_ui_(app_list::SPEECH_RECOGNITION_OFF) {
    202     PopulateApps();
    203     DecorateSearchBox(model_->search_box());
    204   }
    205 
    206  private:
    207   void PopulateApps() {
    208     for (int i = 0; i < static_cast<int>(WindowTypeShelfItem::LAST_TYPE); ++i) {
    209       WindowTypeShelfItem::Type type =
    210           static_cast<WindowTypeShelfItem::Type>(i);
    211       std::string id = base::StringPrintf("%d", i);
    212       scoped_ptr<WindowTypeShelfItem> shelf_item(
    213           new WindowTypeShelfItem(id, type));
    214       model_->AddItem(shelf_item.PassAs<app_list::AppListItem>());
    215     }
    216   }
    217 
    218   gfx::ImageSkia CreateSearchBoxIcon() {
    219     const base::string16 icon_text = base::ASCIIToUTF16("ash");
    220     const gfx::Size icon_size(32, 32);
    221 
    222     gfx::Canvas canvas(icon_size, 1.0f, false /* is_opaque */);
    223     canvas.DrawStringRectWithFlags(
    224         icon_text,
    225         gfx::FontList(),
    226         SK_ColorBLACK,
    227         gfx::Rect(icon_size),
    228         gfx::Canvas::TEXT_ALIGN_CENTER | gfx::Canvas::NO_SUBPIXEL_RENDERING);
    229 
    230     return gfx::ImageSkia(canvas.ExtractImageRep());
    231   }
    232 
    233   void DecorateSearchBox(app_list::SearchBoxModel* search_box_model) {
    234     search_box_model->SetIcon(CreateSearchBoxIcon());
    235     search_box_model->SetHintText(base::ASCIIToUTF16("Type to search..."));
    236   }
    237 
    238   // Overridden from app_list::AppListViewDelegate:
    239   virtual bool ForceNativeDesktop() const OVERRIDE {
    240     return false;
    241   }
    242 
    243   virtual void SetProfileByPath(const base::FilePath& profile_path) OVERRIDE {
    244     // Nothing needs to be done.
    245   }
    246 
    247   virtual const Users& GetUsers() const OVERRIDE {
    248     return users_;
    249   }
    250 
    251   virtual bool ShouldCenterWindow() const OVERRIDE {
    252     return false;
    253   }
    254 
    255   virtual app_list::AppListModel* GetModel() OVERRIDE { return model_.get(); }
    256 
    257   virtual app_list::SpeechUIModel* GetSpeechUI() OVERRIDE {
    258     return &speech_ui_;
    259   }
    260 
    261   virtual void GetShortcutPathForApp(
    262       const std::string& app_id,
    263       const base::Callback<void(const base::FilePath&)>& callback) OVERRIDE {
    264     callback.Run(base::FilePath());
    265   }
    266 
    267   virtual void OpenSearchResult(app_list::SearchResult* result,
    268                                 bool auto_launch,
    269                                 int event_flags) OVERRIDE {
    270     const ExampleSearchResult* example_result =
    271         static_cast<const ExampleSearchResult*>(result);
    272     WindowTypeShelfItem::ActivateItem(example_result->type(), event_flags);
    273   }
    274 
    275   virtual void InvokeSearchResultAction(app_list::SearchResult* result,
    276                                         int action_index,
    277                                         int event_flags) OVERRIDE {
    278     NOTIMPLEMENTED();
    279   }
    280 
    281   virtual base::TimeDelta GetAutoLaunchTimeout() OVERRIDE {
    282     return base::TimeDelta();
    283   }
    284 
    285   virtual void AutoLaunchCanceled() OVERRIDE {
    286   }
    287 
    288   virtual void StartSearch() OVERRIDE {
    289     base::string16 query;
    290     base::TrimWhitespace(model_->search_box()->text(), base::TRIM_ALL, &query);
    291     query = base::i18n::ToLower(query);
    292 
    293     model_->results()->DeleteAll();
    294     if (query.empty())
    295       return;
    296 
    297     for (int i = 0; i < static_cast<int>(WindowTypeShelfItem::LAST_TYPE); ++i) {
    298       WindowTypeShelfItem::Type type =
    299           static_cast<WindowTypeShelfItem::Type>(i);
    300 
    301       base::string16 title =
    302           base::UTF8ToUTF16(WindowTypeShelfItem::GetTitle(type));
    303       if (base::i18n::StringSearchIgnoringCaseAndAccents(
    304               query, title, NULL, NULL)) {
    305         model_->results()->Add(new ExampleSearchResult(type, query));
    306       }
    307     }
    308   }
    309 
    310   virtual void StopSearch() OVERRIDE {
    311     // Nothing needs to be done.
    312   }
    313 
    314   virtual void ViewInitialized() OVERRIDE {
    315     // Nothing needs to be done.
    316   }
    317 
    318   virtual void Dismiss() OVERRIDE {
    319     DCHECK(ash::Shell::HasInstance());
    320     if (Shell::GetInstance()->GetAppListTargetVisibility())
    321       Shell::GetInstance()->ToggleAppList(NULL);
    322   }
    323 
    324   virtual void ViewClosing() OVERRIDE {
    325     // Nothing needs to be done.
    326   }
    327 
    328   virtual gfx::ImageSkia GetWindowIcon() OVERRIDE {
    329     return gfx::ImageSkia();
    330   }
    331 
    332   virtual void OpenSettings() OVERRIDE {
    333     // Nothing needs to be done.
    334   }
    335 
    336   virtual void OpenHelp() OVERRIDE {
    337     // Nothing needs to be done.
    338   }
    339 
    340   virtual void OpenFeedback() OVERRIDE {
    341     // Nothing needs to be done.
    342   }
    343 
    344   virtual void ToggleSpeechRecognition() OVERRIDE {
    345     NOTIMPLEMENTED();
    346   }
    347 
    348   virtual void ShowForProfileByPath(
    349       const base::FilePath& profile_path) OVERRIDE {
    350     // Nothing needs to be done.
    351   }
    352 
    353   virtual views::View* CreateStartPageWebView(const gfx::Size& size) OVERRIDE {
    354     return NULL;
    355   }
    356 
    357   virtual bool IsSpeechRecognitionEnabled() OVERRIDE {
    358     return false;
    359   }
    360 
    361   scoped_ptr<app_list::AppListModel> model_;
    362   app_list::SpeechUIModel speech_ui_;
    363   Users users_;
    364 
    365   DISALLOW_COPY_AND_ASSIGN(ExampleAppListViewDelegate);
    366 };
    367 
    368 }  // namespace
    369 
    370 app_list::AppListViewDelegate* CreateAppListViewDelegate() {
    371   return new ExampleAppListViewDelegate;
    372 }
    373 
    374 }  // namespace shell
    375 }  // namespace ash
    376