src/chrome/browser/ui/views/task_manager_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 "chrome/browser/task_manager/task_manager.h"
   6
   7 #include "base/compiler_specific.h"
   8 #include "base/metrics/stats_table.h"
   9 #include "base/prefs/pref_service.h"
  10 #include "base/prefs/scoped_user_pref_update.h"
  11 #include "base/strings/utf_string_conversions.h"
  12 #include "chrome/app/chrome_command_ids.h"
  13 #include "chrome/browser/browser_process.h"
  14 #include "chrome/browser/ui/browser.h"
  15 #include "chrome/browser/ui/browser_list.h"
  16 #include "chrome/browser/ui/browser_window.h"
  17 #include "chrome/browser/ui/host_desktop.h"
  18 #include "chrome/browser/ui/views/browser_dialogs.h"
  19 #include "chrome/common/pref_names.h"
  20 #include "grit/chromium_strings.h"
  21 #include "grit/generated_resources.h"
  22 #include "grit/theme_resources.h"
  23 #include "ui/base/accelerators/accelerator.h"
  24 #include "ui/base/l10n/l10n_util.h"
  25 #include "ui/base/models/simple_menu_model.h"
  26 #include "ui/base/models/table_model.h"
  27 #include "ui/base/models/table_model_observer.h"
  28 #include "ui/events/event_constants.h"
  29 #include "ui/events/keycodes/keyboard_codes.h"
  30 #include "ui/gfx/canvas.h"
  31 #include "ui/views/context_menu_controller.h"
  32 #include "ui/views/controls/button/label_button.h"
  33 #include "ui/views/controls/link.h"
  34 #include "ui/views/controls/link_listener.h"
  35 #include "ui/views/controls/menu/menu_runner.h"
  36 #include "ui/views/controls/table/table_grouper.h"
  37 #include "ui/views/controls/table/table_view.h"
  38 #include "ui/views/controls/table/table_view_observer.h"
  39 #include "ui/views/layout/layout_constants.h"
  40 #include "ui/views/widget/widget.h"
  41 #include "ui/views/window/dialog_delegate.h"
  42
  43 #if defined(USE_ASH)
  44 #include "ash/wm/window_util.h"
  45 #include "chrome/browser/ui/ash/launcher/launcher_item_util.h"
  46 #include "grit/ash_resources.h"
  47 #endif
  48
  49 #if defined(OS_WIN)
  50 #include "chrome/browser/shell_integration.h"
  51 #include "ui/base/win/shell.h"
  52 #include "ui/views/win/hwnd_util.h"
  53 #endif
  54
  55 namespace {
  56
  57 ////////////////////////////////////////////////////////////////////////////////
  58 // TaskManagerTableModel class
  59 ////////////////////////////////////////////////////////////////////////////////
  60
  61 class TaskManagerTableModel
  62     : public ui::TableModel,
  63       public views::TableGrouper,
  64       public TaskManagerModelObserver {
  65  public:
  66   explicit TaskManagerTableModel(TaskManagerModel* model)
  67       : model_(model),
  68         observer_(NULL) {
  69     model_->AddObserver(this);
  70   }
  71
  72   virtual ~TaskManagerTableModel() {
  73     model_->RemoveObserver(this);
  74   }
  75
  76   // TableModel overrides:
  77   virtual int RowCount() OVERRIDE;
  78   virtual base::string16 GetText(int row, int column) OVERRIDE;
  79   virtual gfx::ImageSkia GetIcon(int row) OVERRIDE;
  80   virtual void SetObserver(ui::TableModelObserver* observer) OVERRIDE;
  81   virtual int CompareValues(int row1, int row2, int column_id) OVERRIDE;
  82
  83   // TableGrouper overrides:
  84   virtual void GetGroupRange(int model_index,
  85                              views::GroupRange* range) OVERRIDE;
  86
  87   // TaskManagerModelObserver overrides:
  88   virtual void OnModelChanged() OVERRIDE;
  89   virtual void OnItemsChanged(int start, int length) OVERRIDE;
  90   virtual void OnItemsAdded(int start, int length) OVERRIDE;
  91   virtual void OnItemsRemoved(int start, int length) OVERRIDE;
  92
  93  private:
  94   TaskManagerModel* model_;
  95   ui::TableModelObserver* observer_;
  96
  97   DISALLOW_COPY_AND_ASSIGN(TaskManagerTableModel);
  98 };
  99
 100 int TaskManagerTableModel::RowCount() {
 101   return model_->ResourceCount();
 102 }
 103
 104 base::string16 TaskManagerTableModel::GetText(int row, int col_id) {
 105   return model_->GetResourceById(row, col_id);
 106 }
 107
 108 gfx::ImageSkia TaskManagerTableModel::GetIcon(int row) {
 109   return model_->GetResourceIcon(row);
 110 }
 111
 112 void TaskManagerTableModel::SetObserver(ui::TableModelObserver* observer) {
 113   observer_ = observer;
 114 }
 115
 116 int TaskManagerTableModel::CompareValues(int row1, int row2, int column_id) {
 117   return model_->CompareValues(row1, row2, column_id);
 118 }
 119
 120 void TaskManagerTableModel::GetGroupRange(int model_index,
 121                                           views::GroupRange* range) {
 122   TaskManagerModel::GroupRange range_pair =
 123       model_->GetGroupRangeForResource(model_index);
 124   range->start = range_pair.first;
 125   range->length = range_pair.second;
 126 }
 127
 128 void TaskManagerTableModel::OnModelChanged() {
 129   if (observer_)
 130     observer_->OnModelChanged();
 131 }
 132
 133 void TaskManagerTableModel::OnItemsChanged(int start, int length) {
 134   if (observer_)
 135     observer_->OnItemsChanged(start, length);
 136 }
 137
 138 void TaskManagerTableModel::OnItemsAdded(int start, int length) {
 139   if (observer_)
 140     observer_->OnItemsAdded(start, length);
 141 }
 142
 143 void TaskManagerTableModel::OnItemsRemoved(int start, int length) {
 144   if (observer_)
 145     observer_->OnItemsRemoved(start, length);
 146 }
 147
 148 // The Task manager UI container.
 149 class TaskManagerView : public views::ButtonListener,
 150                         public views::DialogDelegateView,
 151                         public views::TableViewObserver,
 152                         public views::LinkListener,
 153                         public views::ContextMenuController,
 154                         public ui::SimpleMenuModel::Delegate {
 155  public:
 156   explicit TaskManagerView(chrome::HostDesktopType desktop_type);
 157   virtual ~TaskManagerView();
 158
 159   // Shows the Task manager window, or re-activates an existing one.
 160   static void Show(Browser* browser);
 161
 162   // views::View:
 163   virtual void Layout() OVERRIDE;
 164   virtual gfx::Size GetPreferredSize() OVERRIDE;
 165   virtual bool AcceleratorPressed(const ui::Accelerator& accelerator) OVERRIDE;
 166   virtual void ViewHierarchyChanged(
 167       const ViewHierarchyChangedDetails& details) OVERRIDE;
 168
 169   // views::ButtonListener:
 170   virtual void ButtonPressed(views::Button* sender,
 171                              const ui::Event& event) OVERRIDE;
 172
 173   // views::DialogDelegateView:
 174   virtual bool CanResize() const OVERRIDE;
 175   virtual bool CanMaximize() const OVERRIDE;
 176   virtual bool ExecuteWindowsCommand(int command_id) OVERRIDE;
 177   virtual base::string16 GetWindowTitle() const OVERRIDE;
 178   virtual std::string GetWindowName() const OVERRIDE;
 179   virtual int GetDialogButtons() const OVERRIDE;
 180   virtual void WindowClosing() OVERRIDE;
 181   virtual bool UseNewStyleForThisDialog() const OVERRIDE;
 182
 183   // views::TableViewObserver:
 184   virtual void OnSelectionChanged() OVERRIDE;
 185   virtual void OnDoubleClick() OVERRIDE;
 186   virtual void OnKeyDown(ui::KeyboardCode keycode) OVERRIDE;
 187
 188   // views::LinkListener:
 189   virtual void LinkClicked(views::Link* source, int event_flags) OVERRIDE;
 190
 191   // Called by the column picker to pick up any new stat counters that
 192   // may have appeared since last time.
 193   void UpdateStatsCounters();
 194
 195   // views::ContextMenuController:
 196   virtual void ShowContextMenuForView(views::View* source,
 197                                       const gfx::Point& point,
 198                                       ui::MenuSourceType source_type) OVERRIDE;
 199
 200   // ui::SimpleMenuModel::Delegate:
 201   virtual bool IsCommandIdChecked(int id) const OVERRIDE;
 202   virtual bool IsCommandIdEnabled(int id) const OVERRIDE;
 203   virtual bool GetAcceleratorForCommandId(
 204       int command_id,
 205       ui::Accelerator* accelerator) OVERRIDE;
 206   virtual void ExecuteCommand(int id, int event_flags) OVERRIDE;
 207
 208  private:
 209   // Creates the child controls.
 210   void Init();
 211
 212   // Initializes the state of the always-on-top setting as the window is shown.
 213   void InitAlwaysOnTopState();
 214
 215   // Activates the tab associated with the focused row.
 216   void ActivateFocusedTab();
 217
 218   // Restores saved always on top state from a previous session.
 219   bool GetSavedAlwaysOnTopState(bool* always_on_top) const;
 220
 221   views::LabelButton* kill_button_;
 222   views::Link* about_memory_link_;
 223   views::TableView* tab_table_;
 224   views::View* tab_table_parent_;
 225
 226   TaskManager* task_manager_;
 227
 228   TaskManagerModel* model_;
 229
 230   // all possible columns, not necessarily visible
 231   std::vector<ui::TableColumn> columns_;
 232
 233   scoped_ptr<TaskManagerTableModel> table_model_;
 234
 235   // True when the Task Manager window should be shown on top of other windows.
 236   bool is_always_on_top_;
 237
 238   // The host desktop type this task manager belongs to.
 239   const chrome::HostDesktopType desktop_type_;
 240
 241   // We need to own the text of the menu, the Windows API does not copy it.
 242   base::string16 always_on_top_menu_text_;
 243
 244   // An open Task manager window. There can only be one open at a time. This
 245   // is reset to NULL when the window is closed.
 246   static TaskManagerView* instance_;
 247
 248   scoped_ptr<views::MenuRunner> menu_runner_;
 249
 250   DISALLOW_COPY_AND_ASSIGN(TaskManagerView);
 251 };
 252
 253 // static
 254 TaskManagerView* TaskManagerView::instance_ = NULL;
 255
 256
 257 TaskManagerView::TaskManagerView(chrome::HostDesktopType desktop_type)
 258     : kill_button_(NULL),
 259       about_memory_link_(NULL),
 260       tab_table_(NULL),
 261       tab_table_parent_(NULL),
 262       task_manager_(TaskManager::GetInstance()),
 263       model_(TaskManager::GetInstance()->model()),
 264       is_always_on_top_(false),
 265       desktop_type_(desktop_type) {
 266   Init();
 267 }
 268
 269 TaskManagerView::~TaskManagerView() {
 270   // Delete child views now, while our table model still exists.
 271   RemoveAllChildViews(true);
 272 }
 273
 274 void TaskManagerView::Init() {
 275   table_model_.reset(new TaskManagerTableModel(model_));
 276
 277   // Page column has no header label.
 278   columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_TASK_COLUMN,
 279                                      ui::TableColumn::LEFT, -1, 1));
 280   columns_.back().sortable = true;
 281   columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_PROFILE_NAME_COLUMN,
 282                                      ui::TableColumn::LEFT, -1, 0));
 283   columns_.back().sortable = true;
 284   columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_PHYSICAL_MEM_COLUMN,
 285                                      ui::TableColumn::RIGHT, -1, 0));
 286   columns_.back().sortable = true;
 287   columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_SHARED_MEM_COLUMN,
 288                                      ui::TableColumn::RIGHT, -1, 0));
 289   columns_.back().sortable = true;
 290   columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_PRIVATE_MEM_COLUMN,
 291                                      ui::TableColumn::RIGHT, -1, 0));
 292   columns_.back().sortable = true;
 293   columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_CPU_COLUMN,
 294                                      ui::TableColumn::RIGHT, -1, 0));
 295   columns_.back().sortable = true;
 296   columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_NET_COLUMN,
 297                                      ui::TableColumn::RIGHT, -1, 0));
 298   columns_.back().sortable = true;
 299   columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_PROCESS_ID_COLUMN,
 300                                      ui::TableColumn::RIGHT, -1, 0));
 301   columns_.back().sortable = true;
 302 #if defined(OS_WIN)
 303   columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_GDI_HANDLES_COLUMN,
 304                                      ui::TableColumn::RIGHT, -1, 0));
 305   columns_.back().sortable = true;
 306   columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_USER_HANDLES_COLUMN,
 307                                      ui::TableColumn::RIGHT, -1, 0));
 308   columns_.back().sortable = true;
 309 #endif
 310   columns_.push_back(ui::TableColumn(
 311       IDS_TASK_MANAGER_WEBCORE_IMAGE_CACHE_COLUMN,
 312       ui::TableColumn::RIGHT, -1, 0));
 313   columns_.back().sortable = true;
 314   columns_.push_back(ui::TableColumn(
 315       IDS_TASK_MANAGER_WEBCORE_SCRIPTS_CACHE_COLUMN,
 316       ui::TableColumn::RIGHT, -1, 0));
 317   columns_.back().sortable = true;
 318   columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_WEBCORE_CSS_CACHE_COLUMN,
 319                                      ui::TableColumn::RIGHT, -1, 0));
 320   columns_.back().sortable = true;
 321   columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_FPS_COLUMN,
 322                                      ui::TableColumn::RIGHT, -1, 0));
 323   columns_.back().sortable = true;
 324   columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_VIDEO_MEMORY_COLUMN,
 325                                      ui::TableColumn::RIGHT, -1, 0));
 326   columns_.back().sortable = true;
 327   columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_SQLITE_MEMORY_USED_COLUMN,
 328                                      ui::TableColumn::RIGHT, -1, 0));
 329   columns_.back().sortable = true;
 330   columns_.push_back(ui::TableColumn(
 331         IDS_TASK_MANAGER_NACL_DEBUG_STUB_PORT_COLUMN,
 332         ui::TableColumn::RIGHT, -1, 0));
 333   columns_.back().sortable = true;
 334   columns_.push_back(
 335       ui::TableColumn(IDS_TASK_MANAGER_JAVASCRIPT_MEMORY_ALLOCATED_COLUMN,
 336                       ui::TableColumn::RIGHT, -1, 0));
 337   columns_.back().sortable = true;
 338
 339   tab_table_ = new views::TableView(
 340       table_model_.get(), columns_, views::ICON_AND_TEXT, false);
 341   tab_table_->SetGrouper(table_model_.get());
 342
 343   // Hide some columns by default
 344   tab_table_->SetColumnVisibility(IDS_TASK_MANAGER_PROFILE_NAME_COLUMN, false);
 345   tab_table_->SetColumnVisibility(IDS_TASK_MANAGER_SHARED_MEM_COLUMN, false);
 346   tab_table_->SetColumnVisibility(IDS_TASK_MANAGER_PRIVATE_MEM_COLUMN, false);
 347   tab_table_->SetColumnVisibility(IDS_TASK_MANAGER_WEBCORE_IMAGE_CACHE_COLUMN,
 348                                   false);
 349   tab_table_->SetColumnVisibility(IDS_TASK_MANAGER_WEBCORE_SCRIPTS_CACHE_COLUMN,
 350                                   false);
 351   tab_table_->SetColumnVisibility(IDS_TASK_MANAGER_WEBCORE_CSS_CACHE_COLUMN,
 352                                   false);
 353   tab_table_->SetColumnVisibility(IDS_TASK_MANAGER_VIDEO_MEMORY_COLUMN,
 354                                   false);
 355   tab_table_->SetColumnVisibility(IDS_TASK_MANAGER_SQLITE_MEMORY_USED_COLUMN,
 356                                   false);
 357   tab_table_->SetColumnVisibility(
 358       IDS_TASK_MANAGER_JAVASCRIPT_MEMORY_ALLOCATED_COLUMN, false);
 359   tab_table_->SetColumnVisibility(IDS_TASK_MANAGER_GOATS_TELEPORTED_COLUMN,
 360                                   false);
 361   tab_table_->SetColumnVisibility(IDS_TASK_MANAGER_GDI_HANDLES_COLUMN, false);
 362   tab_table_->SetColumnVisibility(IDS_TASK_MANAGER_USER_HANDLES_COLUMN, false);
 363
 364   UpdateStatsCounters();
 365   tab_table_->SetObserver(this);
 366   tab_table_->set_context_menu_controller(this);
 367   set_context_menu_controller(this);
 368   kill_button_ = new views::LabelButton(this,
 369       l10n_util::GetStringUTF16(IDS_TASK_MANAGER_KILL));
 370   kill_button_->SetStyle(views::Button::STYLE_BUTTON);
 371   about_memory_link_ = new views::Link(
 372       l10n_util::GetStringUTF16(IDS_TASK_MANAGER_ABOUT_MEMORY_LINK));
 373   about_memory_link_->set_listener(this);
 374
 375   // Makes sure our state is consistent.
 376   OnSelectionChanged();
 377
 378   ui::Accelerator ctrl_w(ui::VKEY_W, ui::EF_CONTROL_DOWN);
 379   AddAccelerator(ctrl_w);
 380 }
 381
 382 void TaskManagerView::UpdateStatsCounters() {
 383   base::StatsTable* stats = base::StatsTable::current();
 384   if (stats != NULL) {
 385     int max = stats->GetMaxCounters();
 386     // skip the first row (it's header data)
 387     for (int i = 1; i < max; i++) {
 388       const char* row = stats->GetRowName(i);
 389       if (row != NULL && row[0] != '\0' && !tab_table_->HasColumn(i)) {
 390         // TODO(erikkay): Use l10n to get display names for stats.  Right
 391         // now we're just displaying the internal counter name.  Perhaps
 392         // stat names not in the string table would be filtered out.
 393         ui::TableColumn col;
 394         col.id = i;
 395         col.title = base::ASCIIToUTF16(row);
 396         col.alignment = ui::TableColumn::RIGHT;
 397         // TODO(erikkay): Width is hard-coded right now, so many column
 398         // names are clipped.
 399         col.width = 90;
 400         col.sortable = true;
 401         columns_.push_back(col);
 402         tab_table_->AddColumn(col);
 403       }
 404     }
 405   }
 406 }
 407
 408 void TaskManagerView::ViewHierarchyChanged(
 409     const ViewHierarchyChangedDetails& details) {
 410   // Since we want the Kill button and the Memory Details link to show up in
 411   // the same visual row as the close button, which is provided by the
 412   // framework, we must add the buttons to the non-client view, which is the
 413   // parent of this view. Similarly, when we're removed from the view
 414   // hierarchy, we must take care to clean up those items as well.
 415   if (details.child == this) {
 416     if (details.is_add) {
 417       details.parent->AddChildView(about_memory_link_);
 418       details.parent->AddChildView(kill_button_);
 419       tab_table_parent_ = tab_table_->CreateParentIfNecessary();
 420       AddChildView(tab_table_parent_);
 421     } else {
 422       details.parent->RemoveChildView(kill_button_);
 423       details.parent->RemoveChildView(about_memory_link_);
 424     }
 425   }
 426 }
 427
 428 void TaskManagerView::Layout() {
 429   gfx::Size size = kill_button_->GetPreferredSize();
 430   gfx::Rect parent_bounds = parent()->GetContentsBounds();
 431   const int horizontal_margin = views::kPanelHorizMargin;
 432   const int vertical_margin = views::kButtonVEdgeMargin;
 433   int x = width() - size.width() - horizontal_margin;
 434   int y_buttons = parent_bounds.bottom() - size.height() - vertical_margin;
 435   kill_button_->SetBounds(x, y_buttons, size.width(), size.height());
 436
 437   size = about_memory_link_->GetPreferredSize();
 438   about_memory_link_->SetBounds(
 439       horizontal_margin,
 440       y_buttons + (kill_button_->height() - size.height()) / 2,
 441       size.width(), size.height());
 442
 443   gfx::Rect rect = GetLocalBounds();
 444   rect.Inset(horizontal_margin, views::kPanelVertMargin);
 445   rect.Inset(0, 0, 0,
 446              kill_button_->height() + views::kUnrelatedControlVerticalSpacing);
 447   tab_table_parent_->SetBoundsRect(rect);
 448 }
 449
 450 gfx::Size TaskManagerView::GetPreferredSize() {
 451   return gfx::Size(460, 270);
 452 }
 453
 454 bool TaskManagerView::AcceleratorPressed(const ui::Accelerator& accelerator) {
 455   DCHECK_EQ(ui::VKEY_W, accelerator.key_code());
 456   DCHECK_EQ(ui::EF_CONTROL_DOWN, accelerator.modifiers());
 457   GetWidget()->Close();
 458   return true;
 459 }
 460
 461 // static
 462 void TaskManagerView::Show(Browser* browser) {
 463   // In ash we can come here through the ChromeShellDelegate. If there is no
 464   // browser window at that time of the call, browser could be passed as NULL.
 465   const chrome::HostDesktopType desktop_type =
 466       browser ? browser->host_desktop_type() : chrome::HOST_DESKTOP_TYPE_ASH;
 467
 468   if (instance_) {
 469     // If there's a Task manager window open already, just activate it.
 470     instance_->GetWidget()->Activate();
 471     return;
 472   }
 473   instance_ = new TaskManagerView(desktop_type);
 474   gfx::NativeWindow window =
 475       browser ? browser->window()->GetNativeWindow() : NULL;
 476 #if defined(USE_ASH)
 477   if (!window)
 478     window = ash::wm::GetActiveWindow();
 479 #endif
 480   DialogDelegate::CreateDialogWidget(instance_, window, NULL);
 481   instance_->InitAlwaysOnTopState();
 482   instance_->model_->StartUpdating();
 483 #if defined(OS_WIN)
 484   // Set the app id for the task manager to the app id of its parent browser. If
 485   // no parent is specified, the app id will default to that of the initial
 486   // process.
 487   if (browser) {
 488     ui::win::SetAppIdForWindow(
 489         ShellIntegration::GetChromiumModelIdForProfile(
 490             browser->profile()->GetPath()),
 491         views::HWNDForWidget(instance_->GetWidget()));
 492   }
 493 #endif
 494   instance_->GetWidget()->Show();
 495
 496   // Set the initial focus to the list of tasks.
 497   views::FocusManager* focus_manager = instance_->GetFocusManager();
 498   if (focus_manager)
 499     focus_manager->SetFocusedView(instance_->tab_table_);
 500
 501 #if defined(USE_ASH)
 502   CreateShelfItemForDialog(IDR_ASH_SHELF_ICON_TASK_MANAGER,
 503                            instance_->GetWidget()->GetNativeWindow());
 504 #endif
 505 }
 506
 507 // ButtonListener implementation.
 508 void TaskManagerView::ButtonPressed(
 509     views::Button* sender,
 510     const ui::Event& event) {
 511   typedef ui::ListSelectionModel::SelectedIndices SelectedIndices;
 512   DCHECK_EQ(kill_button_, sender);
 513   SelectedIndices selection(tab_table_->selection_model().selected_indices());
 514   for (SelectedIndices::const_reverse_iterator i = selection.rbegin();
 515         i != selection.rend(); ++i) {
 516     task_manager_->KillProcess(*i);
 517   }
 518 }
 519
 520 // DialogDelegate implementation.
 521 bool TaskManagerView::CanResize() const {
 522   return true;
 523 }
 524
 525 bool TaskManagerView::CanMaximize() const {
 526   return true;
 527 }
 528
 529 bool TaskManagerView::ExecuteWindowsCommand(int command_id) {
 530   return false;
 531 }
 532
 533 base::string16 TaskManagerView::GetWindowTitle() const {
 534   return l10n_util::GetStringUTF16(IDS_TASK_MANAGER_TITLE);
 535 }
 536
 537 std::string TaskManagerView::GetWindowName() const {
 538   return prefs::kTaskManagerWindowPlacement;
 539 }
 540
 541 int TaskManagerView::GetDialogButtons() const {
 542   return ui::DIALOG_BUTTON_NONE;
 543 }
 544
 545 void TaskManagerView::WindowClosing() {
 546   // Now that the window is closed, we can allow a new one to be opened.
 547   // (WindowClosing comes in asynchronously from the call to Close() and we
 548   // may have already opened a new instance).
 549   if (instance_ == this)
 550     instance_ = NULL;
 551   task_manager_->OnWindowClosed();
 552 }
 553
 554 bool TaskManagerView::UseNewStyleForThisDialog() const {
 555   return false;
 556 }
 557
 558 // views::TableViewObserver implementation.
 559 void TaskManagerView::OnSelectionChanged() {
 560   const ui::ListSelectionModel::SelectedIndices& selection(
 561       tab_table_->selection_model().selected_indices());
 562   bool selection_contains_browser_process = false;
 563   for (size_t i = 0; i < selection.size(); ++i) {
 564     if (task_manager_->IsBrowserProcess(selection[i])) {
 565       selection_contains_browser_process = true;
 566       break;
 567     }
 568   }
 569   kill_button_->SetEnabled(!selection_contains_browser_process &&
 570                            !selection.empty());
 571 }
 572
 573 void TaskManagerView::OnDoubleClick() {
 574   ActivateFocusedTab();
 575 }
 576
 577 void TaskManagerView::OnKeyDown(ui::KeyboardCode keycode) {
 578   if (keycode == ui::VKEY_RETURN)
 579     ActivateFocusedTab();
 580 }
 581
 582 void TaskManagerView::LinkClicked(views::Link* source, int event_flags) {
 583   DCHECK_EQ(about_memory_link_, source);
 584   task_manager_->OpenAboutMemory(desktop_type_);
 585 }
 586
 587 void TaskManagerView::ShowContextMenuForView(views::View* source,
 588                                              const gfx::Point& point,
 589                                              ui::MenuSourceType source_type) {
 590   UpdateStatsCounters();
 591   ui::SimpleMenuModel menu_model(this);
 592   for (std::vector<ui::TableColumn>::iterator i(columns_.begin());
 593        i != columns_.end(); ++i) {
 594     menu_model.AddCheckItem(i->id, l10n_util::GetStringUTF16(i->id));
 595   }
 596   menu_runner_.reset(new views::MenuRunner(&menu_model));
 597   if (menu_runner_->RunMenuAt(GetWidget(),
 598                               NULL,
 599                               gfx::Rect(point, gfx::Size()),
 600                               views::MENU_ANCHOR_TOPLEFT,
 601                               source_type,
 602                               views::MenuRunner::CONTEXT_MENU) ==
 603       views::MenuRunner::MENU_DELETED) {
 604     return;
 605   }
 606 }
 607
 608 bool TaskManagerView::IsCommandIdChecked(int id) const {
 609   return tab_table_->IsColumnVisible(id);
 610 }
 611
 612 bool TaskManagerView::IsCommandIdEnabled(int id) const {
 613   return true;
 614 }
 615
 616 bool TaskManagerView::GetAcceleratorForCommandId(
 617     int command_id,
 618     ui::Accelerator* accelerator) {
 619   return false;
 620 }
 621
 622 void TaskManagerView::ExecuteCommand(int id, int event_flags) {
 623   tab_table_->SetColumnVisibility(id, !tab_table_->IsColumnVisible(id));
 624 }
 625
 626 void TaskManagerView::InitAlwaysOnTopState() {
 627   is_always_on_top_ = false;
 628   if (GetSavedAlwaysOnTopState(&is_always_on_top_))
 629     GetWidget()->SetAlwaysOnTop(is_always_on_top_);
 630 }
 631
 632 void TaskManagerView::ActivateFocusedTab() {
 633   const int active_row = tab_table_->selection_model().active();
 634   if (active_row != -1)
 635     task_manager_->ActivateProcess(active_row);
 636 }
 637
 638 bool TaskManagerView::GetSavedAlwaysOnTopState(bool* always_on_top) const {
 639   if (!g_browser_process->local_state())
 640     return false;
 641
 642   const base::DictionaryValue* dictionary =
 643       g_browser_process->local_state()->GetDictionary(GetWindowName().c_str());
 644   return dictionary &&
 645       dictionary->GetBoolean("always_on_top", always_on_top) && always_on_top;
 646 }
 647
 648 }  // namespace
 649
 650 namespace chrome {
 651
 652 // Declared in browser_dialogs.h so others don't need to depend on our header.
 653 void ShowTaskManager(Browser* browser) {
 654   TaskManagerView::Show(browser);
 655 }
 656
 657 }  // namespace chrome