task_manager_view.cc revision 868fa2fe829687343ffae624259930155e16dbd8 
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/background.h"
33#include "ui/views/context_menu_controller.h"
34#include "ui/views/controls/button/label_button.h"
35#include "ui/views/controls/link.h"
36#include "ui/views/controls/link_listener.h"
37#include "ui/views/controls/menu/menu_runner.h"
38#include "ui/views/controls/table/table_grouper.h"
39#include "ui/views/controls/table/table_view.h"
40#include "ui/views/controls/table/table_view_observer.h"
41#include "ui/views/controls/table/table_view_row_background_painter.h"
42#include "ui/views/layout/layout_constants.h"
43#include "ui/views/widget/widget.h"
44#include "ui/views/window/dialog_delegate.h"
45
46#if defined(USE_ASH)
47#include "ash/wm/window_util.h"
48#endif
49
50#if defined(OS_WIN)
51#include "win8/util/win8_util.h"
52#endif
53
54// Yellow highlight used when highlighting background resources.
55static const SkColor kBackgroundResourceHighlight =
56    SkColorSetRGB(0xff, 0xf1, 0xcd);
57
58namespace {
59
60////////////////////////////////////////////////////////////////////////////////
61// TaskManagerTableModel class
62////////////////////////////////////////////////////////////////////////////////
63
64class TaskManagerTableModel
65    : public ui::TableModel,
66      public views::TableGrouper,
67      public TaskManagerModelObserver {
68 public:
69  explicit TaskManagerTableModel(TaskManagerModel* model)
70      : model_(model),
71        observer_(NULL) {
72    model_->AddObserver(this);
73  }
74
75  virtual ~TaskManagerTableModel() {
76    model_->RemoveObserver(this);
77  }
78
79  // TableModel overrides:
80  virtual int RowCount() OVERRIDE;
81  virtual string16 GetText(int row, int column) OVERRIDE;
82  virtual gfx::ImageSkia GetIcon(int row) OVERRIDE;
83  virtual void SetObserver(ui::TableModelObserver* observer) OVERRIDE;
84  virtual int CompareValues(int row1, int row2, int column_id) OVERRIDE;
85
86  // TableGrouper overrides:
87  virtual void GetGroupRange(int model_index,
88                             views::GroupRange* range) OVERRIDE;
89
90  // TaskManagerModelObserver overrides:
91  virtual void OnModelChanged() OVERRIDE;
92  virtual void OnItemsChanged(int start, int length) OVERRIDE;
93  virtual void OnItemsAdded(int start, int length) OVERRIDE;
94  virtual void OnItemsRemoved(int start, int length) OVERRIDE;
95
96  // Returns true if resource corresponding to |row| is a background resource.
97  bool IsBackgroundResource(int row);
98
99 private:
100  TaskManagerModel* model_;
101  ui::TableModelObserver* observer_;
102
103  DISALLOW_COPY_AND_ASSIGN(TaskManagerTableModel);
104};
105
106int TaskManagerTableModel::RowCount() {
107  return model_->ResourceCount();
108}
109
110string16 TaskManagerTableModel::GetText(int row, int col_id) {
111  return model_->GetResourceById(row, col_id);
112}
113
114gfx::ImageSkia TaskManagerTableModel::GetIcon(int row) {
115  return model_->GetResourceIcon(row);
116}
117
118void TaskManagerTableModel::SetObserver(ui::TableModelObserver* observer) {
119  observer_ = observer;
120}
121
122int TaskManagerTableModel::CompareValues(int row1, int row2, int column_id) {
123  return model_->CompareValues(row1, row2, column_id);
124}
125
126void TaskManagerTableModel::GetGroupRange(int model_index,
127                                          views::GroupRange* range) {
128  TaskManagerModel::GroupRange range_pair =
129      model_->GetGroupRangeForResource(model_index);
130  range->start = range_pair.first;
131  range->length = range_pair.second;
132}
133
134void TaskManagerTableModel::OnModelChanged() {
135  if (observer_)
136    observer_->OnModelChanged();
137}
138
139void TaskManagerTableModel::OnItemsChanged(int start, int length) {
140  if (observer_)
141    observer_->OnItemsChanged(start, length);
142}
143
144void TaskManagerTableModel::OnItemsAdded(int start, int length) {
145  if (observer_)
146    observer_->OnItemsAdded(start, length);
147  // There's a bug in the Windows ListView where inserting items with groups
148  // enabled puts them in the wrong position, so we will need to rebuild the
149  // list view in this case.
150  // (see: http://connect.microsoft.com/VisualStudio/feedback/details/115345/).
151  //
152  // Turns out, forcing a list view rebuild causes http://crbug.com/69391
153  // because items are added to the ListView one-at-a-time when initially
154  // displaying the TaskManager, resulting in many ListView rebuilds. So we are
155  // no longer forcing a rebuild for now because the current UI doesn't use
156  // groups - if we are going to add groups in the upcoming TaskManager UI
157  // revamp, we'll need to re-enable this call to OnModelChanged() and also add
158  // code to avoid doing multiple rebuilds on startup (maybe just generate a
159  // single OnModelChanged() call after the initial population).
160
161  // OnModelChanged();
162}
163
164void TaskManagerTableModel::OnItemsRemoved(int start, int length) {
165  if (observer_)
166    observer_->OnItemsRemoved(start, length);
167
168  // We may need to change the indentation of some items if the topmost item
169  // in the group was removed, so update the view.
170  OnModelChanged();
171}
172
173bool TaskManagerTableModel::IsBackgroundResource(int row) {
174  return model_->IsBackgroundResource(row);
175}
176
177class BackgroundPainter : public views::TableViewRowBackgroundPainter {
178 public:
179  explicit BackgroundPainter(TaskManagerTableModel* model) : model_(model) {}
180  virtual ~BackgroundPainter() {}
181
182  virtual void PaintRowBackground(int model_index,
183                                  const gfx::Rect& row_bounds,
184                                  gfx::Canvas* canvas) OVERRIDE {
185    if (model_->IsBackgroundResource(model_index))
186      canvas->FillRect(row_bounds, kBackgroundResourceHighlight);
187  }
188
189 private:
190  TaskManagerTableModel* model_;
191
192  DISALLOW_COPY_AND_ASSIGN(BackgroundPainter);
193};
194
195// The Task manager UI container.
196class TaskManagerView : public views::ButtonListener,
197                        public views::DialogDelegateView,
198                        public views::TableViewObserver,
199                        public views::LinkListener,
200                        public views::ContextMenuController,
201                        public ui::SimpleMenuModel::Delegate {
202 public:
203  TaskManagerView(bool highlight_background_resources,
204                  chrome::HostDesktopType desktop_type);
205  virtual ~TaskManagerView();
206
207  // Shows the Task manager window, or re-activates an existing one. If
208  // |highlight_background_resources| is true, highlights the background
209  // resources in the resource display.
210  static void Show(bool highlight_background_resources, Browser* browser);
211
212  // views::View:
213  virtual void Layout() OVERRIDE;
214  virtual gfx::Size GetPreferredSize() OVERRIDE;
215  virtual void ViewHierarchyChanged(
216      const ViewHierarchyChangedDetails& details) OVERRIDE;
217
218  // views::ButtonListener:
219  virtual void ButtonPressed(views::Button* sender,
220                             const ui::Event& event) OVERRIDE;
221
222  // views::DialogDelegateView:
223  virtual bool CanResize() const OVERRIDE;
224  virtual bool CanMaximize() const OVERRIDE;
225  virtual bool ExecuteWindowsCommand(int command_id) OVERRIDE;
226  virtual string16 GetWindowTitle() const OVERRIDE;
227  virtual std::string GetWindowName() const OVERRIDE;
228  virtual int GetDialogButtons() const OVERRIDE;
229  virtual void WindowClosing() OVERRIDE;
230  virtual bool UseNewStyleForThisDialog() const OVERRIDE;
231
232  // views::TableViewObserver:
233  virtual void OnSelectionChanged() OVERRIDE;
234  virtual void OnDoubleClick() OVERRIDE;
235  virtual void OnKeyDown(ui::KeyboardCode keycode) OVERRIDE;
236
237  // views::LinkListener:
238  virtual void LinkClicked(views::Link* source, int event_flags) OVERRIDE;
239
240  // Called by the column picker to pick up any new stat counters that
241  // may have appeared since last time.
242  void UpdateStatsCounters();
243
244  // views::ContextMenuController:
245  virtual void ShowContextMenuForView(views::View* source,
246                                      const gfx::Point& point) OVERRIDE;
247
248  // ui::SimpleMenuModel::Delegate:
249  virtual bool IsCommandIdChecked(int id) const OVERRIDE;
250  virtual bool IsCommandIdEnabled(int id) const OVERRIDE;
251  virtual bool GetAcceleratorForCommandId(
252      int command_id,
253      ui::Accelerator* accelerator) OVERRIDE;
254  virtual void ExecuteCommand(int id, int event_flags) OVERRIDE;
255
256 private:
257  // Creates the child controls.
258  void Init();
259
260  // Initializes the state of the always-on-top setting as the window is shown.
261  void InitAlwaysOnTopState();
262
263  // Activates the tab associated with the focused row.
264  void ActivateFocusedTab();
265
266  // Adds an always on top item to the window's system menu.
267  void AddAlwaysOnTopSystemMenuItem();
268
269  // Restores saved always on top state from a previous session.
270  bool GetSavedAlwaysOnTopState(bool* always_on_top) const;
271
272  views::LabelButton* purge_memory_button_;
273  views::LabelButton* kill_button_;
274  views::Link* about_memory_link_;
275  views::TableView* tab_table_;
276  views::View* tab_table_parent_;
277
278  TaskManager* task_manager_;
279
280  TaskManagerModel* model_;
281
282  // all possible columns, not necessarily visible
283  std::vector<ui::TableColumn> columns_;
284
285  scoped_ptr<TaskManagerTableModel> table_model_;
286
287  // True when the Task Manager window should be shown on top of other windows.
288  bool is_always_on_top_;
289
290  // True when the Task Manager should highlight background resources.
291  const bool highlight_background_resources_;
292
293  // The host desktop type this task manager belongs to.
294  const chrome::HostDesktopType desktop_type_;
295
296  // We need to own the text of the menu, the Windows API does not copy it.
297  string16 always_on_top_menu_text_;
298
299  // An open Task manager window. There can only be one open at a time. This
300  // is reset to NULL when the window is closed.
301  static TaskManagerView* instance_;
302
303  scoped_ptr<views::MenuRunner> menu_runner_;
304
305  DISALLOW_COPY_AND_ASSIGN(TaskManagerView);
306};
307
308// static
309TaskManagerView* TaskManagerView::instance_ = NULL;
310
311
312TaskManagerView::TaskManagerView(bool highlight_background_resources,
313                                 chrome::HostDesktopType desktop_type)
314    : purge_memory_button_(NULL),
315      kill_button_(NULL),
316      about_memory_link_(NULL),
317      tab_table_(NULL),
318      tab_table_parent_(NULL),
319      task_manager_(TaskManager::GetInstance()),
320      model_(TaskManager::GetInstance()->model()),
321      is_always_on_top_(false),
322      highlight_background_resources_(highlight_background_resources),
323      desktop_type_(desktop_type) {
324  Init();
325}
326
327TaskManagerView::~TaskManagerView() {
328  // Delete child views now, while our table model still exists.
329  RemoveAllChildViews(true);
330}
331
332void TaskManagerView::Init() {
333  table_model_.reset(new TaskManagerTableModel(model_));
334
335  // Page column has no header label.
336  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_TASK_COLUMN,
337                                     ui::TableColumn::LEFT, -1, 1));
338  columns_.back().sortable = true;
339  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_PROFILE_NAME_COLUMN,
340                                     ui::TableColumn::LEFT, -1, 0));
341  columns_.back().sortable = true;
342  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_PHYSICAL_MEM_COLUMN,
343                                     ui::TableColumn::RIGHT, -1, 0));
344  columns_.back().sortable = true;
345  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_SHARED_MEM_COLUMN,
346                                     ui::TableColumn::RIGHT, -1, 0));
347  columns_.back().sortable = true;
348  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_PRIVATE_MEM_COLUMN,
349                                     ui::TableColumn::RIGHT, -1, 0));
350  columns_.back().sortable = true;
351  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_CPU_COLUMN,
352                                     ui::TableColumn::RIGHT, -1, 0));
353  columns_.back().sortable = true;
354  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_NET_COLUMN,
355                                     ui::TableColumn::RIGHT, -1, 0));
356  columns_.back().sortable = true;
357  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_PROCESS_ID_COLUMN,
358                                     ui::TableColumn::RIGHT, -1, 0));
359  columns_.back().sortable = true;
360#if defined(OS_WIN)
361  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_GDI_HANDLES_COLUMN,
362                                     ui::TableColumn::RIGHT, -1, 0));
363  columns_.back().sortable = true;
364  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_USER_HANDLES_COLUMN,
365                                     ui::TableColumn::RIGHT, -1, 0));
366  columns_.back().sortable = true;
367#endif
368  columns_.push_back(ui::TableColumn(
369      IDS_TASK_MANAGER_WEBCORE_IMAGE_CACHE_COLUMN,
370      ui::TableColumn::RIGHT, -1, 0));
371  columns_.back().sortable = true;
372  columns_.push_back(ui::TableColumn(
373      IDS_TASK_MANAGER_WEBCORE_SCRIPTS_CACHE_COLUMN,
374      ui::TableColumn::RIGHT, -1, 0));
375  columns_.back().sortable = true;
376  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_WEBCORE_CSS_CACHE_COLUMN,
377                                     ui::TableColumn::RIGHT, -1, 0));
378  columns_.back().sortable = true;
379  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_FPS_COLUMN,
380                                     ui::TableColumn::RIGHT, -1, 0));
381  columns_.back().sortable = true;
382  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_VIDEO_MEMORY_COLUMN,
383                                     ui::TableColumn::RIGHT, -1, 0));
384  columns_.back().sortable = true;
385  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_SQLITE_MEMORY_USED_COLUMN,
386                                     ui::TableColumn::RIGHT, -1, 0));
387  columns_.back().sortable = true;
388  columns_.push_back(
389      ui::TableColumn(IDS_TASK_MANAGER_JAVASCRIPT_MEMORY_ALLOCATED_COLUMN,
390                      ui::TableColumn::RIGHT, -1, 0));
391  columns_.back().sortable = true;
392
393  tab_table_ = new views::TableView(
394      table_model_.get(), columns_, views::ICON_AND_TEXT, false);
395  tab_table_->SetGrouper(table_model_.get());
396  if (highlight_background_resources_) {
397    scoped_ptr<BackgroundPainter> painter(
398        new BackgroundPainter(table_model_.get()));
399    tab_table_->SetRowBackgroundPainter(
400        painter.PassAs<views::TableViewRowBackgroundPainter>());
401  }
402
403  // Hide some columns by default
404  tab_table_->SetColumnVisibility(IDS_TASK_MANAGER_PROFILE_NAME_COLUMN, false);
405  tab_table_->SetColumnVisibility(IDS_TASK_MANAGER_SHARED_MEM_COLUMN, false);
406  tab_table_->SetColumnVisibility(IDS_TASK_MANAGER_PRIVATE_MEM_COLUMN, false);
407  tab_table_->SetColumnVisibility(IDS_TASK_MANAGER_WEBCORE_IMAGE_CACHE_COLUMN,
408                                  false);
409  tab_table_->SetColumnVisibility(IDS_TASK_MANAGER_WEBCORE_SCRIPTS_CACHE_COLUMN,
410                                  false);
411  tab_table_->SetColumnVisibility(IDS_TASK_MANAGER_WEBCORE_CSS_CACHE_COLUMN,
412                                  false);
413  tab_table_->SetColumnVisibility(IDS_TASK_MANAGER_VIDEO_MEMORY_COLUMN,
414                                  false);
415  tab_table_->SetColumnVisibility(IDS_TASK_MANAGER_SQLITE_MEMORY_USED_COLUMN,
416                                  false);
417  tab_table_->SetColumnVisibility(
418      IDS_TASK_MANAGER_JAVASCRIPT_MEMORY_ALLOCATED_COLUMN, false);
419  tab_table_->SetColumnVisibility(IDS_TASK_MANAGER_GOATS_TELEPORTED_COLUMN,
420                                  false);
421  tab_table_->SetColumnVisibility(IDS_TASK_MANAGER_GDI_HANDLES_COLUMN, false);
422  tab_table_->SetColumnVisibility(IDS_TASK_MANAGER_USER_HANDLES_COLUMN, false);
423
424  UpdateStatsCounters();
425  tab_table_->SetObserver(this);
426  tab_table_->set_context_menu_controller(this);
427  set_context_menu_controller(this);
428  // If we're running with --purge-memory-button, add a "Purge memory" button.
429  if (CommandLine::ForCurrentProcess()->HasSwitch(
430      switches::kPurgeMemoryButton)) {
431    purge_memory_button_ = new views::LabelButton(this,
432        l10n_util::GetStringUTF16(IDS_TASK_MANAGER_PURGE_MEMORY));
433    purge_memory_button_->SetStyle(views::Button::STYLE_NATIVE_TEXTBUTTON);
434  }
435  kill_button_ = new views::LabelButton(this,
436      l10n_util::GetStringUTF16(IDS_TASK_MANAGER_KILL));
437  kill_button_->SetStyle(views::Button::STYLE_NATIVE_TEXTBUTTON);
438  about_memory_link_ = new views::Link(
439      l10n_util::GetStringUTF16(IDS_TASK_MANAGER_ABOUT_MEMORY_LINK));
440  about_memory_link_->set_listener(this);
441
442  // Makes sure our state is consistent.
443  OnSelectionChanged();
444}
445
446void TaskManagerView::UpdateStatsCounters() {
447  base::StatsTable* stats = base::StatsTable::current();
448  if (stats != NULL) {
449    int max = stats->GetMaxCounters();
450    // skip the first row (it's header data)
451    for (int i = 1; i < max; i++) {
452      const char* row = stats->GetRowName(i);
453      if (row != NULL && row[0] != '\0' && !tab_table_->HasColumn(i)) {
454        // TODO(erikkay): Use l10n to get display names for stats.  Right
455        // now we're just displaying the internal counter name.  Perhaps
456        // stat names not in the string table would be filtered out.
457        ui::TableColumn col;
458        col.id = i;
459        col.title = ASCIIToUTF16(row);
460        col.alignment = ui::TableColumn::RIGHT;
461        // TODO(erikkay): Width is hard-coded right now, so many column
462        // names are clipped.
463        col.width = 90;
464        col.sortable = true;
465        columns_.push_back(col);
466        tab_table_->AddColumn(col);
467      }
468    }
469  }
470}
471
472void TaskManagerView::ViewHierarchyChanged(
473    const ViewHierarchyChangedDetails& details) {
474  // Since we want the Kill button and the Memory Details link to show up in
475  // the same visual row as the close button, which is provided by the
476  // framework, we must add the buttons to the non-client view, which is the
477  // parent of this view. Similarly, when we're removed from the view
478  // hierarchy, we must take care to clean up those items as well.
479  if (details.child == this) {
480    if (details.is_add) {
481      details.parent->AddChildView(about_memory_link_);
482      if (purge_memory_button_)
483        details.parent->AddChildView(purge_memory_button_);
484      details.parent->AddChildView(kill_button_);
485      tab_table_parent_ = tab_table_->CreateParentIfNecessary();
486      AddChildView(tab_table_parent_);
487    } else {
488      details.parent->RemoveChildView(kill_button_);
489      if (purge_memory_button_)
490        details.parent->RemoveChildView(purge_memory_button_);
491      details.parent->RemoveChildView(about_memory_link_);
492    }
493  }
494}
495
496void TaskManagerView::Layout() {
497  gfx::Size size = kill_button_->GetPreferredSize();
498  gfx::Rect parent_bounds = parent()->GetContentsBounds();
499  const int horizontal_margin = views::kPanelHorizMargin;
500  const int vertical_margin = views::kButtonVEdgeMargin;
501  int x = width() - size.width() - horizontal_margin;
502  int y_buttons = parent_bounds.bottom() - size.height() - vertical_margin;
503  kill_button_->SetBounds(x, y_buttons, size.width(), size.height());
504
505  if (purge_memory_button_) {
506    size = purge_memory_button_->GetPreferredSize();
507    purge_memory_button_->SetBounds(
508        kill_button_->x() - size.width() -
509            views::kUnrelatedControlHorizontalSpacing,
510        y_buttons, size.width(), size.height());
511  }
512
513  size = about_memory_link_->GetPreferredSize();
514  about_memory_link_->SetBounds(
515      horizontal_margin,
516      y_buttons + (kill_button_->height() - size.height()) / 2,
517      size.width(), size.height());
518
519  gfx::Rect rect = GetLocalBounds();
520  rect.Inset(horizontal_margin, views::kPanelVertMargin);
521  rect.Inset(0, 0, 0,
522             kill_button_->height() + views::kUnrelatedControlVerticalSpacing);
523  tab_table_parent_->SetBoundsRect(rect);
524}
525
526gfx::Size TaskManagerView::GetPreferredSize() {
527  return gfx::Size(460, 270);
528}
529
530// static
531void TaskManagerView::Show(bool highlight_background_resources,
532                           Browser* browser) {
533#if defined(OS_WIN)
534  // In Windows Metro it's not good to open this native window.
535  DCHECK(!win8::IsSingleWindowMetroMode());
536#endif
537  // In ash we can come here through the ChromeShellDelegate. If there is no
538  // browser window at that time of the call, browser could be passed as NULL.
539  const chrome::HostDesktopType desktop_type =
540      browser ? browser->host_desktop_type() : chrome::HOST_DESKTOP_TYPE_ASH;
541
542  if (instance_) {
543    if (instance_->highlight_background_resources_ !=
544        highlight_background_resources ||
545        instance_->desktop_type_ != desktop_type) {
546      instance_->GetWidget()->Close();
547    } else {
548      // If there's a Task manager window open already, just activate it.
549      instance_->GetWidget()->Activate();
550      return;
551    }
552  }
553  instance_ = new TaskManagerView(highlight_background_resources, desktop_type);
554  gfx::NativeWindow window =
555      browser ? browser->window()->GetNativeWindow() : NULL;
556#if defined(USE_ASH)
557  if (!window)
558    window = ash::wm::GetActiveWindow();
559#endif
560  DialogDelegate::CreateDialogWidget(instance_, window, NULL);
561  instance_->InitAlwaysOnTopState();
562  instance_->model_->StartUpdating();
563  instance_->GetWidget()->Show();
564
565  // Set the initial focus to the list of tasks.
566  views::FocusManager* focus_manager = instance_->GetFocusManager();
567  if (focus_manager)
568    focus_manager->SetFocusedView(instance_->tab_table_);
569}
570
571// ButtonListener implementation.
572void TaskManagerView::ButtonPressed(
573    views::Button* sender,
574    const ui::Event& event) {
575  if (purge_memory_button_ && (sender == purge_memory_button_)) {
576    MemoryPurger::PurgeAll();
577  } else {
578    typedef ui::ListSelectionModel::SelectedIndices SelectedIndices;
579    DCHECK_EQ(kill_button_, sender);
580    SelectedIndices selection(tab_table_->selection_model().selected_indices());
581    for (SelectedIndices::const_reverse_iterator i = selection.rbegin();
582         i != selection.rend(); ++i) {
583      task_manager_->KillProcess(*i);
584    }
585  }
586}
587
588// DialogDelegate implementation.
589bool TaskManagerView::CanResize() const {
590  return true;
591}
592
593bool TaskManagerView::CanMaximize() const {
594  return true;
595}
596
597bool TaskManagerView::ExecuteWindowsCommand(int command_id) {
598#if defined(OS_WIN) && !defined(USE_AURA)
599  if (command_id == IDC_ALWAYS_ON_TOP) {
600    is_always_on_top_ = !is_always_on_top_;
601
602    // Change the menu check state.
603    HMENU system_menu = GetSystemMenu(GetWidget()->GetNativeWindow(), FALSE);
604    MENUITEMINFO menu_info;
605    memset(&menu_info, 0, sizeof(MENUITEMINFO));
606    menu_info.cbSize = sizeof(MENUITEMINFO);
607    BOOL r = GetMenuItemInfo(system_menu, IDC_ALWAYS_ON_TOP,
608                             FALSE, &menu_info);
609    DCHECK(r);
610    menu_info.fMask = MIIM_STATE;
611    if (is_always_on_top_)
612      menu_info.fState = MFS_CHECKED;
613    r = SetMenuItemInfo(system_menu, IDC_ALWAYS_ON_TOP, FALSE, &menu_info);
614
615    // Now change the actual window's behavior.
616    GetWidget()->SetAlwaysOnTop(is_always_on_top_);
617
618    // Save the state.
619    if (g_browser_process->local_state()) {
620      DictionaryPrefUpdate update(g_browser_process->local_state(),
621                                  GetWindowName().c_str());
622      DictionaryValue* window_preferences = update.Get();
623      window_preferences->SetBoolean("always_on_top", is_always_on_top_);
624    }
625    return true;
626  }
627#endif
628  return false;
629}
630
631string16 TaskManagerView::GetWindowTitle() const {
632  return l10n_util::GetStringUTF16(IDS_TASK_MANAGER_TITLE);
633}
634
635std::string TaskManagerView::GetWindowName() const {
636  return prefs::kTaskManagerWindowPlacement;
637}
638
639int TaskManagerView::GetDialogButtons() const {
640  return ui::DIALOG_BUTTON_NONE;
641}
642
643void TaskManagerView::WindowClosing() {
644  // Now that the window is closed, we can allow a new one to be opened.
645  // (WindowClosing comes in asynchronously from the call to Close() and we
646  // may have already opened a new instance).
647  if (instance_ == this)
648    instance_ = NULL;
649  task_manager_->OnWindowClosed();
650}
651
652bool TaskManagerView::UseNewStyleForThisDialog() const {
653  return false;
654}
655
656// views::TableViewObserver implementation.
657void TaskManagerView::OnSelectionChanged() {
658  const ui::ListSelectionModel::SelectedIndices& selection(
659      tab_table_->selection_model().selected_indices());
660  bool selection_contains_browser_process = false;
661  for (size_t i = 0; i < selection.size(); ++i) {
662    if (task_manager_->IsBrowserProcess(selection[i])) {
663      selection_contains_browser_process = true;
664      break;
665    }
666  }
667  kill_button_->SetEnabled(!selection_contains_browser_process &&
668                           !selection.empty());
669}
670
671void TaskManagerView::OnDoubleClick() {
672  ActivateFocusedTab();
673}
674
675void TaskManagerView::OnKeyDown(ui::KeyboardCode keycode) {
676  if (keycode == ui::VKEY_RETURN)
677    ActivateFocusedTab();
678}
679
680void TaskManagerView::LinkClicked(views::Link* source, int event_flags) {
681  DCHECK_EQ(about_memory_link_, source);
682  task_manager_->OpenAboutMemory(desktop_type_);
683}
684
685void TaskManagerView::ShowContextMenuForView(views::View* source,
686                                             const gfx::Point& point) {
687  UpdateStatsCounters();
688  ui::SimpleMenuModel menu_model(this);
689  for (std::vector<ui::TableColumn>::iterator i(columns_.begin());
690       i != columns_.end(); ++i) {
691    menu_model.AddCheckItem(i->id, l10n_util::GetStringUTF16(i->id));
692  }
693  menu_runner_.reset(new views::MenuRunner(&menu_model));
694  if (menu_runner_->RunMenuAt(GetWidget(), NULL, gfx::Rect(point, gfx::Size()),
695                              views::MenuItemView::TOPLEFT,
696                              views::MenuRunner::CONTEXT_MENU) ==
697      views::MenuRunner::MENU_DELETED)
698    return;
699}
700
701bool TaskManagerView::IsCommandIdChecked(int id) const {
702  return tab_table_->IsColumnVisible(id);
703}
704
705bool TaskManagerView::IsCommandIdEnabled(int id) const {
706  return true;
707}
708
709bool TaskManagerView::GetAcceleratorForCommandId(
710    int command_id,
711    ui::Accelerator* accelerator) {
712  return false;
713}
714
715void TaskManagerView::ExecuteCommand(int id, int event_flags) {
716  tab_table_->SetColumnVisibility(id, !tab_table_->IsColumnVisible(id));
717}
718
719void TaskManagerView::InitAlwaysOnTopState() {
720  is_always_on_top_ = false;
721  if (GetSavedAlwaysOnTopState(&is_always_on_top_))
722    GetWidget()->SetAlwaysOnTop(is_always_on_top_);
723  AddAlwaysOnTopSystemMenuItem();
724}
725
726void TaskManagerView::ActivateFocusedTab() {
727  const int active_row = tab_table_->selection_model().active();
728  if (active_row != -1)
729    task_manager_->ActivateProcess(active_row);
730}
731
732void TaskManagerView::AddAlwaysOnTopSystemMenuItem() {
733#if defined(OS_WIN) && !defined(USE_AURA)
734  // The Win32 API requires that we own the text.
735  always_on_top_menu_text_ = l10n_util::GetStringUTF16(IDS_ALWAYS_ON_TOP);
736
737  // Let's insert a menu to the window.
738  HMENU system_menu = ::GetSystemMenu(GetWidget()->GetNativeWindow(), FALSE);
739  int index = ::GetMenuItemCount(system_menu) - 1;
740  if (index < 0) {
741    // Paranoia check.
742    NOTREACHED();
743    index = 0;
744  }
745  // First we add the separator.
746  MENUITEMINFO menu_info;
747  memset(&menu_info, 0, sizeof(MENUITEMINFO));
748  menu_info.cbSize = sizeof(MENUITEMINFO);
749  menu_info.fMask = MIIM_FTYPE;
750  menu_info.fType = MFT_SEPARATOR;
751  ::InsertMenuItem(system_menu, index, TRUE, &menu_info);
752
753  // Then the actual menu.
754  menu_info.fMask = MIIM_FTYPE | MIIM_ID | MIIM_STRING | MIIM_STATE;
755  menu_info.fType = MFT_STRING;
756  menu_info.fState = MFS_ENABLED;
757  if (is_always_on_top_)
758    menu_info.fState |= MFS_CHECKED;
759  menu_info.wID = IDC_ALWAYS_ON_TOP;
760  menu_info.dwTypeData = const_cast<wchar_t*>(always_on_top_menu_text_.c_str());
761  ::InsertMenuItem(system_menu, index, TRUE, &menu_info);
762#endif
763}
764
765bool TaskManagerView::GetSavedAlwaysOnTopState(bool* always_on_top) const {
766  if (!g_browser_process->local_state())
767    return false;
768
769  const DictionaryValue* dictionary =
770      g_browser_process->local_state()->GetDictionary(GetWindowName().c_str());
771  return dictionary &&
772      dictionary->GetBoolean("always_on_top", always_on_top) && always_on_top;
773}
774
775}  // namespace
776
777namespace chrome {
778
779// Declared in browser_dialogs.h so others don't need to depend on our header.
780void ShowTaskManager(Browser* browser, bool highlight_background_resources) {
781  TaskManagerView::Show(highlight_background_resources, browser);
782}
783
784}  // namespace chrome
785