task_manager_view.cc revision 58537e28ecd584eab876aee8be7156509866d23a 
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/command_line.h"
8#include "base/compiler_specific.h"
9#include "base/metrics/stats_table.h"
10#include "base/prefs/pref_service.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/memory_purger.h"
15#include "chrome/browser/prefs/scoped_user_pref_update.h"
16#include "chrome/browser/ui/browser.h"
17#include "chrome/browser/ui/browser_list.h"
18#include "chrome/browser/ui/browser_window.h"
19#include "chrome/browser/ui/host_desktop.h"
20#include "chrome/browser/ui/views/browser_dialogs.h"
21#include "chrome/common/chrome_switches.h"
22#include "chrome/common/pref_names.h"
23#include "grit/chromium_strings.h"
24#include "grit/generated_resources.h"
25#include "grit/theme_resources.h"
26#include "ui/base/accelerators/accelerator.h"
27#include "ui/base/l10n/l10n_util.h"
28#include "ui/base/models/simple_menu_model.h"
29#include "ui/base/models/table_model.h"
30#include "ui/base/models/table_model_observer.h"
31#include "ui/gfx/canvas.h"
32#include "ui/views/context_menu_controller.h"
33#include "ui/views/controls/button/label_button.h"
34#include "ui/views/controls/link.h"
35#include "ui/views/controls/link_listener.h"
36#include "ui/views/controls/menu/menu_runner.h"
37#include "ui/views/controls/table/table_grouper.h"
38#include "ui/views/controls/table/table_view.h"
39#include "ui/views/controls/table/table_view_observer.h"
40#include "ui/views/layout/layout_constants.h"
41#include "ui/views/widget/widget.h"
42#include "ui/views/window/dialog_delegate.h"
43
44#if defined(USE_ASH)
45#include "ash/wm/window_util.h"
46#endif
47
48#if defined(OS_WIN)
49#include "chrome/browser/shell_integration.h"
50#include "ui/base/win/shell.h"
51#include "ui/views/win/hwnd_util.h"
52#include "win8/util/win8_util.h"
53#endif
54
55namespace {
56
57////////////////////////////////////////////////////////////////////////////////
58// TaskManagerTableModel class
59////////////////////////////////////////////////////////////////////////////////
60
61class 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 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
100int TaskManagerTableModel::RowCount() {
101  return model_->ResourceCount();
102}
103
104string16 TaskManagerTableModel::GetText(int row, int col_id) {
105  return model_->GetResourceById(row, col_id);
106}
107
108gfx::ImageSkia TaskManagerTableModel::GetIcon(int row) {
109  return model_->GetResourceIcon(row);
110}
111
112void TaskManagerTableModel::SetObserver(ui::TableModelObserver* observer) {
113  observer_ = observer;
114}
115
116int TaskManagerTableModel::CompareValues(int row1, int row2, int column_id) {
117  return model_->CompareValues(row1, row2, column_id);
118}
119
120void 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
128void TaskManagerTableModel::OnModelChanged() {
129  if (observer_)
130    observer_->OnModelChanged();
131}
132
133void TaskManagerTableModel::OnItemsChanged(int start, int length) {
134  if (observer_)
135    observer_->OnItemsChanged(start, length);
136}
137
138void TaskManagerTableModel::OnItemsAdded(int start, int length) {
139  if (observer_)
140    observer_->OnItemsAdded(start, length);
141}
142
143void TaskManagerTableModel::OnItemsRemoved(int start, int length) {
144  if (observer_)
145    observer_->OnItemsRemoved(start, length);
146}
147
148// The Task manager UI container.
149class 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 void ViewHierarchyChanged(
166      const ViewHierarchyChangedDetails& details) OVERRIDE;
167
168  // views::ButtonListener:
169  virtual void ButtonPressed(views::Button* sender,
170                             const ui::Event& event) OVERRIDE;
171
172  // views::DialogDelegateView:
173  virtual bool CanResize() const OVERRIDE;
174  virtual bool CanMaximize() const OVERRIDE;
175  virtual bool ExecuteWindowsCommand(int command_id) OVERRIDE;
176  virtual string16 GetWindowTitle() const OVERRIDE;
177  virtual std::string GetWindowName() const OVERRIDE;
178  virtual int GetDialogButtons() const OVERRIDE;
179  virtual void WindowClosing() OVERRIDE;
180  virtual bool UseNewStyleForThisDialog() const OVERRIDE;
181
182  // views::TableViewObserver:
183  virtual void OnSelectionChanged() OVERRIDE;
184  virtual void OnDoubleClick() OVERRIDE;
185  virtual void OnKeyDown(ui::KeyboardCode keycode) OVERRIDE;
186
187  // views::LinkListener:
188  virtual void LinkClicked(views::Link* source, int event_flags) OVERRIDE;
189
190  // Called by the column picker to pick up any new stat counters that
191  // may have appeared since last time.
192  void UpdateStatsCounters();
193
194  // views::ContextMenuController:
195  virtual void ShowContextMenuForView(views::View* source,
196                                      const gfx::Point& point,
197                                      ui::MenuSourceType source_type) OVERRIDE;
198
199  // ui::SimpleMenuModel::Delegate:
200  virtual bool IsCommandIdChecked(int id) const OVERRIDE;
201  virtual bool IsCommandIdEnabled(int id) const OVERRIDE;
202  virtual bool GetAcceleratorForCommandId(
203      int command_id,
204      ui::Accelerator* accelerator) OVERRIDE;
205  virtual void ExecuteCommand(int id, int event_flags) OVERRIDE;
206
207 private:
208  // Creates the child controls.
209  void Init();
210
211  // Initializes the state of the always-on-top setting as the window is shown.
212  void InitAlwaysOnTopState();
213
214  // Activates the tab associated with the focused row.
215  void ActivateFocusedTab();
216
217  // Adds an always on top item to the window's system menu.
218  void AddAlwaysOnTopSystemMenuItem();
219
220  // Restores saved always on top state from a previous session.
221  bool GetSavedAlwaysOnTopState(bool* always_on_top) const;
222
223  views::LabelButton* purge_memory_button_;
224  views::LabelButton* kill_button_;
225  views::Link* about_memory_link_;
226  views::TableView* tab_table_;
227  views::View* tab_table_parent_;
228
229  TaskManager* task_manager_;
230
231  TaskManagerModel* model_;
232
233  // all possible columns, not necessarily visible
234  std::vector<ui::TableColumn> columns_;
235
236  scoped_ptr<TaskManagerTableModel> table_model_;
237
238  // True when the Task Manager window should be shown on top of other windows.
239  bool is_always_on_top_;
240
241  // The host desktop type this task manager belongs to.
242  const chrome::HostDesktopType desktop_type_;
243
244  // We need to own the text of the menu, the Windows API does not copy it.
245  string16 always_on_top_menu_text_;
246
247  // An open Task manager window. There can only be one open at a time. This
248  // is reset to NULL when the window is closed.
249  static TaskManagerView* instance_;
250
251  scoped_ptr<views::MenuRunner> menu_runner_;
252
253  DISALLOW_COPY_AND_ASSIGN(TaskManagerView);
254};
255
256// static
257TaskManagerView* TaskManagerView::instance_ = NULL;
258
259
260TaskManagerView::TaskManagerView(chrome::HostDesktopType desktop_type)
261    : purge_memory_button_(NULL),
262      kill_button_(NULL),
263      about_memory_link_(NULL),
264      tab_table_(NULL),
265      tab_table_parent_(NULL),
266      task_manager_(TaskManager::GetInstance()),
267      model_(TaskManager::GetInstance()->model()),
268      is_always_on_top_(false),
269      desktop_type_(desktop_type) {
270  Init();
271}
272
273TaskManagerView::~TaskManagerView() {
274  // Delete child views now, while our table model still exists.
275  RemoveAllChildViews(true);
276}
277
278void TaskManagerView::Init() {
279  table_model_.reset(new TaskManagerTableModel(model_));
280
281  // Page column has no header label.
282  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_TASK_COLUMN,
283                                     ui::TableColumn::LEFT, -1, 1));
284  columns_.back().sortable = true;
285  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_PROFILE_NAME_COLUMN,
286                                     ui::TableColumn::LEFT, -1, 0));
287  columns_.back().sortable = true;
288  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_PHYSICAL_MEM_COLUMN,
289                                     ui::TableColumn::RIGHT, -1, 0));
290  columns_.back().sortable = true;
291  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_SHARED_MEM_COLUMN,
292                                     ui::TableColumn::RIGHT, -1, 0));
293  columns_.back().sortable = true;
294  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_PRIVATE_MEM_COLUMN,
295                                     ui::TableColumn::RIGHT, -1, 0));
296  columns_.back().sortable = true;
297  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_CPU_COLUMN,
298                                     ui::TableColumn::RIGHT, -1, 0));
299  columns_.back().sortable = true;
300  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_NET_COLUMN,
301                                     ui::TableColumn::RIGHT, -1, 0));
302  columns_.back().sortable = true;
303  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_PROCESS_ID_COLUMN,
304                                     ui::TableColumn::RIGHT, -1, 0));
305  columns_.back().sortable = true;
306#if defined(OS_WIN)
307  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_GDI_HANDLES_COLUMN,
308                                     ui::TableColumn::RIGHT, -1, 0));
309  columns_.back().sortable = true;
310  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_USER_HANDLES_COLUMN,
311                                     ui::TableColumn::RIGHT, -1, 0));
312  columns_.back().sortable = true;
313#endif
314  columns_.push_back(ui::TableColumn(
315      IDS_TASK_MANAGER_WEBCORE_IMAGE_CACHE_COLUMN,
316      ui::TableColumn::RIGHT, -1, 0));
317  columns_.back().sortable = true;
318  columns_.push_back(ui::TableColumn(
319      IDS_TASK_MANAGER_WEBCORE_SCRIPTS_CACHE_COLUMN,
320      ui::TableColumn::RIGHT, -1, 0));
321  columns_.back().sortable = true;
322  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_WEBCORE_CSS_CACHE_COLUMN,
323                                     ui::TableColumn::RIGHT, -1, 0));
324  columns_.back().sortable = true;
325  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_FPS_COLUMN,
326                                     ui::TableColumn::RIGHT, -1, 0));
327  columns_.back().sortable = true;
328  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_VIDEO_MEMORY_COLUMN,
329                                     ui::TableColumn::RIGHT, -1, 0));
330  columns_.back().sortable = true;
331  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_SQLITE_MEMORY_USED_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  // If we're running with --purge-memory-button, add a "Purge memory" button.
369  if (CommandLine::ForCurrentProcess()->HasSwitch(
370      switches::kPurgeMemoryButton)) {
371    purge_memory_button_ = new views::LabelButton(this,
372        l10n_util::GetStringUTF16(IDS_TASK_MANAGER_PURGE_MEMORY));
373    purge_memory_button_->SetStyle(views::Button::STYLE_NATIVE_TEXTBUTTON);
374  }
375  kill_button_ = new views::LabelButton(this,
376      l10n_util::GetStringUTF16(IDS_TASK_MANAGER_KILL));
377  kill_button_->SetStyle(views::Button::STYLE_NATIVE_TEXTBUTTON);
378  about_memory_link_ = new views::Link(
379      l10n_util::GetStringUTF16(IDS_TASK_MANAGER_ABOUT_MEMORY_LINK));
380  about_memory_link_->set_listener(this);
381
382  // Makes sure our state is consistent.
383  OnSelectionChanged();
384}
385
386void TaskManagerView::UpdateStatsCounters() {
387  base::StatsTable* stats = base::StatsTable::current();
388  if (stats != NULL) {
389    int max = stats->GetMaxCounters();
390    // skip the first row (it's header data)
391    for (int i = 1; i < max; i++) {
392      const char* row = stats->GetRowName(i);
393      if (row != NULL && row[0] != '\0' && !tab_table_->HasColumn(i)) {
394        // TODO(erikkay): Use l10n to get display names for stats.  Right
395        // now we're just displaying the internal counter name.  Perhaps
396        // stat names not in the string table would be filtered out.
397        ui::TableColumn col;
398        col.id = i;
399        col.title = ASCIIToUTF16(row);
400        col.alignment = ui::TableColumn::RIGHT;
401        // TODO(erikkay): Width is hard-coded right now, so many column
402        // names are clipped.
403        col.width = 90;
404        col.sortable = true;
405        columns_.push_back(col);
406        tab_table_->AddColumn(col);
407      }
408    }
409  }
410}
411
412void TaskManagerView::ViewHierarchyChanged(
413    const ViewHierarchyChangedDetails& details) {
414  // Since we want the Kill button and the Memory Details link to show up in
415  // the same visual row as the close button, which is provided by the
416  // framework, we must add the buttons to the non-client view, which is the
417  // parent of this view. Similarly, when we're removed from the view
418  // hierarchy, we must take care to clean up those items as well.
419  if (details.child == this) {
420    if (details.is_add) {
421      details.parent->AddChildView(about_memory_link_);
422      if (purge_memory_button_)
423        details.parent->AddChildView(purge_memory_button_);
424      details.parent->AddChildView(kill_button_);
425      tab_table_parent_ = tab_table_->CreateParentIfNecessary();
426      AddChildView(tab_table_parent_);
427    } else {
428      details.parent->RemoveChildView(kill_button_);
429      if (purge_memory_button_)
430        details.parent->RemoveChildView(purge_memory_button_);
431      details.parent->RemoveChildView(about_memory_link_);
432    }
433  }
434}
435
436void TaskManagerView::Layout() {
437  gfx::Size size = kill_button_->GetPreferredSize();
438  gfx::Rect parent_bounds = parent()->GetContentsBounds();
439  const int horizontal_margin = views::kPanelHorizMargin;
440  const int vertical_margin = views::kButtonVEdgeMargin;
441  int x = width() - size.width() - horizontal_margin;
442  int y_buttons = parent_bounds.bottom() - size.height() - vertical_margin;
443  kill_button_->SetBounds(x, y_buttons, size.width(), size.height());
444
445  if (purge_memory_button_) {
446    size = purge_memory_button_->GetPreferredSize();
447    purge_memory_button_->SetBounds(
448        kill_button_->x() - size.width() -
449            views::kUnrelatedControlHorizontalSpacing,
450        y_buttons, size.width(), size.height());
451  }
452
453  size = about_memory_link_->GetPreferredSize();
454  about_memory_link_->SetBounds(
455      horizontal_margin,
456      y_buttons + (kill_button_->height() - size.height()) / 2,
457      size.width(), size.height());
458
459  gfx::Rect rect = GetLocalBounds();
460  rect.Inset(horizontal_margin, views::kPanelVertMargin);
461  rect.Inset(0, 0, 0,
462             kill_button_->height() + views::kUnrelatedControlVerticalSpacing);
463  tab_table_parent_->SetBoundsRect(rect);
464}
465
466gfx::Size TaskManagerView::GetPreferredSize() {
467  return gfx::Size(460, 270);
468}
469
470// static
471void TaskManagerView::Show(Browser* browser) {
472#if defined(OS_WIN)
473  // In Windows Metro it's not good to open this native window.
474  DCHECK(!win8::IsSingleWindowMetroMode());
475#endif
476  // In ash we can come here through the ChromeShellDelegate. If there is no
477  // browser window at that time of the call, browser could be passed as NULL.
478  const chrome::HostDesktopType desktop_type =
479      browser ? browser->host_desktop_type() : chrome::HOST_DESKTOP_TYPE_ASH;
480
481  if (instance_) {
482    // If there's a Task manager window open already, just activate it.
483    instance_->GetWidget()->Activate();
484    return;
485  }
486  instance_ = new TaskManagerView(desktop_type);
487  gfx::NativeWindow window =
488      browser ? browser->window()->GetNativeWindow() : NULL;
489#if defined(USE_ASH)
490  if (!window)
491    window = ash::wm::GetActiveWindow();
492#endif
493  DialogDelegate::CreateDialogWidget(instance_, window, NULL);
494  instance_->InitAlwaysOnTopState();
495  instance_->model_->StartUpdating();
496#if defined(OS_WIN)
497  // Set the app id for the task manager to the app id of its parent browser. If
498  // no parent is specified, the app id will default to that of the initial
499  // process.
500  if (browser) {
501    ui::win::SetAppIdForWindow(
502        ShellIntegration::GetChromiumModelIdForProfile(
503            browser->profile()->GetPath()),
504        views::HWNDForWidget(instance_->GetWidget()));
505  }
506#endif
507  instance_->GetWidget()->Show();
508
509  // Set the initial focus to the list of tasks.
510  views::FocusManager* focus_manager = instance_->GetFocusManager();
511  if (focus_manager)
512    focus_manager->SetFocusedView(instance_->tab_table_);
513}
514
515// ButtonListener implementation.
516void TaskManagerView::ButtonPressed(
517    views::Button* sender,
518    const ui::Event& event) {
519  if (purge_memory_button_ && (sender == purge_memory_button_)) {
520    MemoryPurger::PurgeAll();
521  } else {
522    typedef ui::ListSelectionModel::SelectedIndices SelectedIndices;
523    DCHECK_EQ(kill_button_, sender);
524    SelectedIndices selection(tab_table_->selection_model().selected_indices());
525    for (SelectedIndices::const_reverse_iterator i = selection.rbegin();
526         i != selection.rend(); ++i) {
527      task_manager_->KillProcess(*i);
528    }
529  }
530}
531
532// DialogDelegate implementation.
533bool TaskManagerView::CanResize() const {
534  return true;
535}
536
537bool TaskManagerView::CanMaximize() const {
538  return true;
539}
540
541bool TaskManagerView::ExecuteWindowsCommand(int command_id) {
542#if defined(OS_WIN) && !defined(USE_AURA)
543  if (command_id == IDC_ALWAYS_ON_TOP) {
544    is_always_on_top_ = !is_always_on_top_;
545
546    // Change the menu check state.
547    HMENU system_menu = GetSystemMenu(GetWidget()->GetNativeWindow(), FALSE);
548    MENUITEMINFO menu_info;
549    memset(&menu_info, 0, sizeof(MENUITEMINFO));
550    menu_info.cbSize = sizeof(MENUITEMINFO);
551    BOOL r = GetMenuItemInfo(system_menu, IDC_ALWAYS_ON_TOP,
552                             FALSE, &menu_info);
553    DCHECK(r);
554    menu_info.fMask = MIIM_STATE;
555    if (is_always_on_top_)
556      menu_info.fState = MFS_CHECKED;
557    r = SetMenuItemInfo(system_menu, IDC_ALWAYS_ON_TOP, FALSE, &menu_info);
558
559    // Now change the actual window's behavior.
560    GetWidget()->SetAlwaysOnTop(is_always_on_top_);
561
562    // Save the state.
563    if (g_browser_process->local_state()) {
564      DictionaryPrefUpdate update(g_browser_process->local_state(),
565                                  GetWindowName().c_str());
566      DictionaryValue* window_preferences = update.Get();
567      window_preferences->SetBoolean("always_on_top", is_always_on_top_);
568    }
569    return true;
570  }
571#endif
572  return false;
573}
574
575string16 TaskManagerView::GetWindowTitle() const {
576  return l10n_util::GetStringUTF16(IDS_TASK_MANAGER_TITLE);
577}
578
579std::string TaskManagerView::GetWindowName() const {
580  return prefs::kTaskManagerWindowPlacement;
581}
582
583int TaskManagerView::GetDialogButtons() const {
584  return ui::DIALOG_BUTTON_NONE;
585}
586
587void TaskManagerView::WindowClosing() {
588  // Now that the window is closed, we can allow a new one to be opened.
589  // (WindowClosing comes in asynchronously from the call to Close() and we
590  // may have already opened a new instance).
591  if (instance_ == this)
592    instance_ = NULL;
593  task_manager_->OnWindowClosed();
594}
595
596bool TaskManagerView::UseNewStyleForThisDialog() const {
597  return false;
598}
599
600// views::TableViewObserver implementation.
601void TaskManagerView::OnSelectionChanged() {
602  const ui::ListSelectionModel::SelectedIndices& selection(
603      tab_table_->selection_model().selected_indices());
604  bool selection_contains_browser_process = false;
605  for (size_t i = 0; i < selection.size(); ++i) {
606    if (task_manager_->IsBrowserProcess(selection[i])) {
607      selection_contains_browser_process = true;
608      break;
609    }
610  }
611  kill_button_->SetEnabled(!selection_contains_browser_process &&
612                           !selection.empty());
613}
614
615void TaskManagerView::OnDoubleClick() {
616  ActivateFocusedTab();
617}
618
619void TaskManagerView::OnKeyDown(ui::KeyboardCode keycode) {
620  if (keycode == ui::VKEY_RETURN)
621    ActivateFocusedTab();
622}
623
624void TaskManagerView::LinkClicked(views::Link* source, int event_flags) {
625  DCHECK_EQ(about_memory_link_, source);
626  task_manager_->OpenAboutMemory(desktop_type_);
627}
628
629void TaskManagerView::ShowContextMenuForView(views::View* source,
630                                             const gfx::Point& point,
631                                             ui::MenuSourceType source_type) {
632  UpdateStatsCounters();
633  ui::SimpleMenuModel menu_model(this);
634  for (std::vector<ui::TableColumn>::iterator i(columns_.begin());
635       i != columns_.end(); ++i) {
636    menu_model.AddCheckItem(i->id, l10n_util::GetStringUTF16(i->id));
637  }
638  menu_runner_.reset(new views::MenuRunner(&menu_model));
639  if (menu_runner_->RunMenuAt(GetWidget(), NULL, gfx::Rect(point, gfx::Size()),
640                              views::MenuItemView::TOPLEFT, source_type,
641                              views::MenuRunner::CONTEXT_MENU) ==
642      views::MenuRunner::MENU_DELETED)
643    return;
644}
645
646bool TaskManagerView::IsCommandIdChecked(int id) const {
647  return tab_table_->IsColumnVisible(id);
648}
649
650bool TaskManagerView::IsCommandIdEnabled(int id) const {
651  return true;
652}
653
654bool TaskManagerView::GetAcceleratorForCommandId(
655    int command_id,
656    ui::Accelerator* accelerator) {
657  return false;
658}
659
660void TaskManagerView::ExecuteCommand(int id, int event_flags) {
661  tab_table_->SetColumnVisibility(id, !tab_table_->IsColumnVisible(id));
662}
663
664void TaskManagerView::InitAlwaysOnTopState() {
665  is_always_on_top_ = false;
666  if (GetSavedAlwaysOnTopState(&is_always_on_top_))
667    GetWidget()->SetAlwaysOnTop(is_always_on_top_);
668  AddAlwaysOnTopSystemMenuItem();
669}
670
671void TaskManagerView::ActivateFocusedTab() {
672  const int active_row = tab_table_->selection_model().active();
673  if (active_row != -1)
674    task_manager_->ActivateProcess(active_row);
675}
676
677void TaskManagerView::AddAlwaysOnTopSystemMenuItem() {
678#if defined(OS_WIN) && !defined(USE_AURA)
679  // The Win32 API requires that we own the text.
680  always_on_top_menu_text_ = l10n_util::GetStringUTF16(IDS_ALWAYS_ON_TOP);
681
682  // Let's insert a menu to the window.
683  HMENU system_menu = ::GetSystemMenu(GetWidget()->GetNativeWindow(), FALSE);
684  int index = ::GetMenuItemCount(system_menu) - 1;
685  if (index < 0) {
686    // Paranoia check.
687    NOTREACHED();
688    index = 0;
689  }
690  // First we add the separator.
691  MENUITEMINFO menu_info;
692  memset(&menu_info, 0, sizeof(MENUITEMINFO));
693  menu_info.cbSize = sizeof(MENUITEMINFO);
694  menu_info.fMask = MIIM_FTYPE;
695  menu_info.fType = MFT_SEPARATOR;
696  ::InsertMenuItem(system_menu, index, TRUE, &menu_info);
697
698  // Then the actual menu.
699  menu_info.fMask = MIIM_FTYPE | MIIM_ID | MIIM_STRING | MIIM_STATE;
700  menu_info.fType = MFT_STRING;
701  menu_info.fState = MFS_ENABLED;
702  if (is_always_on_top_)
703    menu_info.fState |= MFS_CHECKED;
704  menu_info.wID = IDC_ALWAYS_ON_TOP;
705  menu_info.dwTypeData = const_cast<wchar_t*>(always_on_top_menu_text_.c_str());
706  ::InsertMenuItem(system_menu, index, TRUE, &menu_info);
707#endif
708}
709
710bool TaskManagerView::GetSavedAlwaysOnTopState(bool* always_on_top) const {
711  if (!g_browser_process->local_state())
712    return false;
713
714  const DictionaryValue* dictionary =
715      g_browser_process->local_state()->GetDictionary(GetWindowName().c_str());
716  return dictionary &&
717      dictionary->GetBoolean("always_on_top", always_on_top) && always_on_top;
718}
719
720}  // namespace
721
722namespace chrome {
723
724// Declared in browser_dialogs.h so others don't need to depend on our header.
725void ShowTaskManager(Browser* browser) {
726  TaskManagerView::Show(browser);
727}
728
729}  // namespace chrome
730