root/chrome/browser/ui/views/task_manager_view.cc

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DEFINITIONS

This source file includes following definitions.
  1. observer_
  2. RowCount
  3. GetText
  4. GetIcon
  5. SetObserver
  6. CompareValues
  7. GetGroupRange
  8. OnModelChanged
  9. OnItemsChanged
  10. OnItemsAdded
  11. OnItemsRemoved
  12. desktop_type_
  13. Init
  14. UpdateStatsCounters
  15. ViewHierarchyChanged
  16. Layout
  17. GetPreferredSize
  18. AcceleratorPressed
  19. Show
  20. ButtonPressed
  21. CanResize
  22. CanMaximize
  23. ExecuteWindowsCommand
  24. GetWindowTitle
  25. GetWindowName
  26. GetDialogButtons
  27. WindowClosing
  28. UseNewStyleForThisDialog
  29. OnSelectionChanged
  30. OnDoubleClick
  31. OnKeyDown
  32. LinkClicked
  33. ShowContextMenuForView
  34. IsCommandIdChecked
  35. IsCommandIdEnabled
  36. GetAcceleratorForCommandId
  37. ExecuteCommand
  38. InitAlwaysOnTopState
  39. ActivateFocusedTab
  40. GetSavedAlwaysOnTopState
  41. ShowTaskManager

// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "chrome/browser/task_manager/task_manager.h"

#include "base/compiler_specific.h"
#include "base/metrics/stats_table.h"
#include "base/prefs/pref_service.h"
#include "base/prefs/scoped_user_pref_update.h"
#include "base/strings/utf_string_conversions.h"
#include "chrome/app/chrome_command_ids.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/browser_list.h"
#include "chrome/browser/ui/browser_window.h"
#include "chrome/browser/ui/host_desktop.h"
#include "chrome/browser/ui/views/browser_dialogs.h"
#include "chrome/common/pref_names.h"
#include "grit/chromium_strings.h"
#include "grit/generated_resources.h"
#include "grit/theme_resources.h"
#include "ui/base/accelerators/accelerator.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/base/models/simple_menu_model.h"
#include "ui/base/models/table_model.h"
#include "ui/base/models/table_model_observer.h"
#include "ui/events/event_constants.h"
#include "ui/events/keycodes/keyboard_codes.h"
#include "ui/gfx/canvas.h"
#include "ui/views/context_menu_controller.h"
#include "ui/views/controls/button/label_button.h"
#include "ui/views/controls/link.h"
#include "ui/views/controls/link_listener.h"
#include "ui/views/controls/menu/menu_runner.h"
#include "ui/views/controls/table/table_grouper.h"
#include "ui/views/controls/table/table_view.h"
#include "ui/views/controls/table/table_view_observer.h"
#include "ui/views/layout/layout_constants.h"
#include "ui/views/widget/widget.h"
#include "ui/views/window/dialog_delegate.h"

#if defined(USE_ASH)
#include "ash/wm/window_util.h"
#include "chrome/browser/ui/ash/launcher/launcher_item_util.h"
#include "grit/ash_resources.h"
#endif

#if defined(OS_WIN)
#include "chrome/browser/shell_integration.h"
#include "ui/base/win/shell.h"
#include "ui/views/win/hwnd_util.h"
#include "win8/util/win8_util.h"
#endif

namespace {

////////////////////////////////////////////////////////////////////////////////
// TaskManagerTableModel class
////////////////////////////////////////////////////////////////////////////////

class TaskManagerTableModel
    : public ui::TableModel,
      public views::TableGrouper,
      public TaskManagerModelObserver {
 public:
  explicit TaskManagerTableModel(TaskManagerModel* model)
      : model_(model),
        observer_(NULL) {
    model_->AddObserver(this);
  }

  virtual ~TaskManagerTableModel() {
    model_->RemoveObserver(this);
  }

  // TableModel overrides:
  virtual int RowCount() OVERRIDE;
  virtual base::string16 GetText(int row, int column) OVERRIDE;
  virtual gfx::ImageSkia GetIcon(int row) OVERRIDE;
  virtual void SetObserver(ui::TableModelObserver* observer) OVERRIDE;
  virtual int CompareValues(int row1, int row2, int column_id) OVERRIDE;

  // TableGrouper overrides:
  virtual void GetGroupRange(int model_index,
                             views::GroupRange* range) OVERRIDE;

  // TaskManagerModelObserver overrides:
  virtual void OnModelChanged() OVERRIDE;
  virtual void OnItemsChanged(int start, int length) OVERRIDE;
  virtual void OnItemsAdded(int start, int length) OVERRIDE;
  virtual void OnItemsRemoved(int start, int length) OVERRIDE;

 private:
  TaskManagerModel* model_;
  ui::TableModelObserver* observer_;

  DISALLOW_COPY_AND_ASSIGN(TaskManagerTableModel);
};

int TaskManagerTableModel::RowCount() {
  return model_->ResourceCount();
}

base::string16 TaskManagerTableModel::GetText(int row, int col_id) {
  return model_->GetResourceById(row, col_id);
}

gfx::ImageSkia TaskManagerTableModel::GetIcon(int row) {
  return model_->GetResourceIcon(row);
}

void TaskManagerTableModel::SetObserver(ui::TableModelObserver* observer) {
  observer_ = observer;
}

int TaskManagerTableModel::CompareValues(int row1, int row2, int column_id) {
  return model_->CompareValues(row1, row2, column_id);
}

void TaskManagerTableModel::GetGroupRange(int model_index,
                                          views::GroupRange* range) {
  TaskManagerModel::GroupRange range_pair =
      model_->GetGroupRangeForResource(model_index);
  range->start = range_pair.first;
  range->length = range_pair.second;
}

void TaskManagerTableModel::OnModelChanged() {
  if (observer_)
    observer_->OnModelChanged();
}

void TaskManagerTableModel::OnItemsChanged(int start, int length) {
  if (observer_)
    observer_->OnItemsChanged(start, length);
}

void TaskManagerTableModel::OnItemsAdded(int start, int length) {
  if (observer_)
    observer_->OnItemsAdded(start, length);
}

void TaskManagerTableModel::OnItemsRemoved(int start, int length) {
  if (observer_)
    observer_->OnItemsRemoved(start, length);
}

// The Task manager UI container.
class TaskManagerView : public views::ButtonListener,
                        public views::DialogDelegateView,
                        public views::TableViewObserver,
                        public views::LinkListener,
                        public views::ContextMenuController,
                        public ui::SimpleMenuModel::Delegate {
 public:
  explicit TaskManagerView(chrome::HostDesktopType desktop_type);
  virtual ~TaskManagerView();

  // Shows the Task manager window, or re-activates an existing one.
  static void Show(Browser* browser);

  // views::View:
  virtual void Layout() OVERRIDE;
  virtual gfx::Size GetPreferredSize() OVERRIDE;
  virtual bool AcceleratorPressed(const ui::Accelerator& accelerator) OVERRIDE;
  virtual void ViewHierarchyChanged(
      const ViewHierarchyChangedDetails& details) OVERRIDE;

  // views::ButtonListener:
  virtual void ButtonPressed(views::Button* sender,
                             const ui::Event& event) OVERRIDE;

  // views::DialogDelegateView:
  virtual bool CanResize() const OVERRIDE;
  virtual bool CanMaximize() const OVERRIDE;
  virtual bool ExecuteWindowsCommand(int command_id) OVERRIDE;
  virtual base::string16 GetWindowTitle() const OVERRIDE;
  virtual std::string GetWindowName() const OVERRIDE;
  virtual int GetDialogButtons() const OVERRIDE;
  virtual void WindowClosing() OVERRIDE;
  virtual bool UseNewStyleForThisDialog() const OVERRIDE;

  // views::TableViewObserver:
  virtual void OnSelectionChanged() OVERRIDE;
  virtual void OnDoubleClick() OVERRIDE;
  virtual void OnKeyDown(ui::KeyboardCode keycode) OVERRIDE;

  // views::LinkListener:
  virtual void LinkClicked(views::Link* source, int event_flags) OVERRIDE;

  // Called by the column picker to pick up any new stat counters that
  // may have appeared since last time.
  void UpdateStatsCounters();

  // views::ContextMenuController:
  virtual void ShowContextMenuForView(views::View* source,
                                      const gfx::Point& point,
                                      ui::MenuSourceType source_type) OVERRIDE;

  // ui::SimpleMenuModel::Delegate:
  virtual bool IsCommandIdChecked(int id) const OVERRIDE;
  virtual bool IsCommandIdEnabled(int id) const OVERRIDE;
  virtual bool GetAcceleratorForCommandId(
      int command_id,
      ui::Accelerator* accelerator) OVERRIDE;
  virtual void ExecuteCommand(int id, int event_flags) OVERRIDE;

 private:
  // Creates the child controls.
  void Init();

  // Initializes the state of the always-on-top setting as the window is shown.
  void InitAlwaysOnTopState();

  // Activates the tab associated with the focused row.
  void ActivateFocusedTab();

  // Restores saved always on top state from a previous session.
  bool GetSavedAlwaysOnTopState(bool* always_on_top) const;

  views::LabelButton* kill_button_;
  views::Link* about_memory_link_;
  views::TableView* tab_table_;
  views::View* tab_table_parent_;

  TaskManager* task_manager_;

  TaskManagerModel* model_;

  // all possible columns, not necessarily visible
  std::vector<ui::TableColumn> columns_;

  scoped_ptr<TaskManagerTableModel> table_model_;

  // True when the Task Manager window should be shown on top of other windows.
  bool is_always_on_top_;

  // The host desktop type this task manager belongs to.
  const chrome::HostDesktopType desktop_type_;

  // We need to own the text of the menu, the Windows API does not copy it.
  base::string16 always_on_top_menu_text_;

  // An open Task manager window. There can only be one open at a time. This
  // is reset to NULL when the window is closed.
  static TaskManagerView* instance_;

  scoped_ptr<views::MenuRunner> menu_runner_;

  DISALLOW_COPY_AND_ASSIGN(TaskManagerView);
};

// static
TaskManagerView* TaskManagerView::instance_ = NULL;


TaskManagerView::TaskManagerView(chrome::HostDesktopType desktop_type)
    : kill_button_(NULL),
      about_memory_link_(NULL),
      tab_table_(NULL),
      tab_table_parent_(NULL),
      task_manager_(TaskManager::GetInstance()),
      model_(TaskManager::GetInstance()->model()),
      is_always_on_top_(false),
      desktop_type_(desktop_type) {
  Init();
}

TaskManagerView::~TaskManagerView() {
  // Delete child views now, while our table model still exists.
  RemoveAllChildViews(true);
}

void TaskManagerView::Init() {
  table_model_.reset(new TaskManagerTableModel(model_));

  // Page column has no header label.
  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_TASK_COLUMN,
                                     ui::TableColumn::LEFT, -1, 1));
  columns_.back().sortable = true;
  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_PROFILE_NAME_COLUMN,
                                     ui::TableColumn::LEFT, -1, 0));
  columns_.back().sortable = true;
  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_PHYSICAL_MEM_COLUMN,
                                     ui::TableColumn::RIGHT, -1, 0));
  columns_.back().sortable = true;
  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_SHARED_MEM_COLUMN,
                                     ui::TableColumn::RIGHT, -1, 0));
  columns_.back().sortable = true;
  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_PRIVATE_MEM_COLUMN,
                                     ui::TableColumn::RIGHT, -1, 0));
  columns_.back().sortable = true;
  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_CPU_COLUMN,
                                     ui::TableColumn::RIGHT, -1, 0));
  columns_.back().sortable = true;
  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_NET_COLUMN,
                                     ui::TableColumn::RIGHT, -1, 0));
  columns_.back().sortable = true;
  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_PROCESS_ID_COLUMN,
                                     ui::TableColumn::RIGHT, -1, 0));
  columns_.back().sortable = true;
#if defined(OS_WIN)
  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_GDI_HANDLES_COLUMN,
                                     ui::TableColumn::RIGHT, -1, 0));
  columns_.back().sortable = true;
  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_USER_HANDLES_COLUMN,
                                     ui::TableColumn::RIGHT, -1, 0));
  columns_.back().sortable = true;
#endif
  columns_.push_back(ui::TableColumn(
      IDS_TASK_MANAGER_WEBCORE_IMAGE_CACHE_COLUMN,
      ui::TableColumn::RIGHT, -1, 0));
  columns_.back().sortable = true;
  columns_.push_back(ui::TableColumn(
      IDS_TASK_MANAGER_WEBCORE_SCRIPTS_CACHE_COLUMN,
      ui::TableColumn::RIGHT, -1, 0));
  columns_.back().sortable = true;
  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_WEBCORE_CSS_CACHE_COLUMN,
                                     ui::TableColumn::RIGHT, -1, 0));
  columns_.back().sortable = true;
  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_FPS_COLUMN,
                                     ui::TableColumn::RIGHT, -1, 0));
  columns_.back().sortable = true;
  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_VIDEO_MEMORY_COLUMN,
                                     ui::TableColumn::RIGHT, -1, 0));
  columns_.back().sortable = true;
  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_SQLITE_MEMORY_USED_COLUMN,
                                     ui::TableColumn::RIGHT, -1, 0));
  columns_.back().sortable = true;
  columns_.push_back(ui::TableColumn(
        IDS_TASK_MANAGER_NACL_DEBUG_STUB_PORT_COLUMN,
        ui::TableColumn::RIGHT, -1, 0));
  columns_.back().sortable = true;
  columns_.push_back(
      ui::TableColumn(IDS_TASK_MANAGER_JAVASCRIPT_MEMORY_ALLOCATED_COLUMN,
                      ui::TableColumn::RIGHT, -1, 0));
  columns_.back().sortable = true;

  tab_table_ = new views::TableView(
      table_model_.get(), columns_, views::ICON_AND_TEXT, false);
  tab_table_->SetGrouper(table_model_.get());

  // Hide some columns by default
  tab_table_->SetColumnVisibility(IDS_TASK_MANAGER_PROFILE_NAME_COLUMN, false);
  tab_table_->SetColumnVisibility(IDS_TASK_MANAGER_SHARED_MEM_COLUMN, false);
  tab_table_->SetColumnVisibility(IDS_TASK_MANAGER_PRIVATE_MEM_COLUMN, false);
  tab_table_->SetColumnVisibility(IDS_TASK_MANAGER_WEBCORE_IMAGE_CACHE_COLUMN,
                                  false);
  tab_table_->SetColumnVisibility(IDS_TASK_MANAGER_WEBCORE_SCRIPTS_CACHE_COLUMN,
                                  false);
  tab_table_->SetColumnVisibility(IDS_TASK_MANAGER_WEBCORE_CSS_CACHE_COLUMN,
                                  false);
  tab_table_->SetColumnVisibility(IDS_TASK_MANAGER_VIDEO_MEMORY_COLUMN,
                                  false);
  tab_table_->SetColumnVisibility(IDS_TASK_MANAGER_SQLITE_MEMORY_USED_COLUMN,
                                  false);
  tab_table_->SetColumnVisibility(
      IDS_TASK_MANAGER_JAVASCRIPT_MEMORY_ALLOCATED_COLUMN, false);
  tab_table_->SetColumnVisibility(IDS_TASK_MANAGER_GOATS_TELEPORTED_COLUMN,
                                  false);
  tab_table_->SetColumnVisibility(IDS_TASK_MANAGER_GDI_HANDLES_COLUMN, false);
  tab_table_->SetColumnVisibility(IDS_TASK_MANAGER_USER_HANDLES_COLUMN, false);

  UpdateStatsCounters();
  tab_table_->SetObserver(this);
  tab_table_->set_context_menu_controller(this);
  set_context_menu_controller(this);
  kill_button_ = new views::LabelButton(this,
      l10n_util::GetStringUTF16(IDS_TASK_MANAGER_KILL));
  kill_button_->SetStyle(views::Button::STYLE_BUTTON);
  about_memory_link_ = new views::Link(
      l10n_util::GetStringUTF16(IDS_TASK_MANAGER_ABOUT_MEMORY_LINK));
  about_memory_link_->set_listener(this);

  // Makes sure our state is consistent.
  OnSelectionChanged();

  ui::Accelerator ctrl_w(ui::VKEY_W, ui::EF_CONTROL_DOWN);
  AddAccelerator(ctrl_w);
}

void TaskManagerView::UpdateStatsCounters() {
  base::StatsTable* stats = base::StatsTable::current();
  if (stats != NULL) {
    int max = stats->GetMaxCounters();
    // skip the first row (it's header data)
    for (int i = 1; i < max; i++) {
      const char* row = stats->GetRowName(i);
      if (row != NULL && row[0] != '\0' && !tab_table_->HasColumn(i)) {
        // TODO(erikkay): Use l10n to get display names for stats.  Right
        // now we're just displaying the internal counter name.  Perhaps
        // stat names not in the string table would be filtered out.
        ui::TableColumn col;
        col.id = i;
        col.title = base::ASCIIToUTF16(row);
        col.alignment = ui::TableColumn::RIGHT;
        // TODO(erikkay): Width is hard-coded right now, so many column
        // names are clipped.
        col.width = 90;
        col.sortable = true;
        columns_.push_back(col);
        tab_table_->AddColumn(col);
      }
    }
  }
}

void TaskManagerView::ViewHierarchyChanged(
    const ViewHierarchyChangedDetails& details) {
  // Since we want the Kill button and the Memory Details link to show up in
  // the same visual row as the close button, which is provided by the
  // framework, we must add the buttons to the non-client view, which is the
  // parent of this view. Similarly, when we're removed from the view
  // hierarchy, we must take care to clean up those items as well.
  if (details.child == this) {
    if (details.is_add) {
      details.parent->AddChildView(about_memory_link_);
      details.parent->AddChildView(kill_button_);
      tab_table_parent_ = tab_table_->CreateParentIfNecessary();
      AddChildView(tab_table_parent_);
    } else {
      details.parent->RemoveChildView(kill_button_);
      details.parent->RemoveChildView(about_memory_link_);
    }
  }
}

void TaskManagerView::Layout() {
  gfx::Size size = kill_button_->GetPreferredSize();
  gfx::Rect parent_bounds = parent()->GetContentsBounds();
  const int horizontal_margin = views::kPanelHorizMargin;
  const int vertical_margin = views::kButtonVEdgeMargin;
  int x = width() - size.width() - horizontal_margin;
  int y_buttons = parent_bounds.bottom() - size.height() - vertical_margin;
  kill_button_->SetBounds(x, y_buttons, size.width(), size.height());

  size = about_memory_link_->GetPreferredSize();
  about_memory_link_->SetBounds(
      horizontal_margin,
      y_buttons + (kill_button_->height() - size.height()) / 2,
      size.width(), size.height());

  gfx::Rect rect = GetLocalBounds();
  rect.Inset(horizontal_margin, views::kPanelVertMargin);
  rect.Inset(0, 0, 0,
             kill_button_->height() + views::kUnrelatedControlVerticalSpacing);
  tab_table_parent_->SetBoundsRect(rect);
}

gfx::Size TaskManagerView::GetPreferredSize() {
  return gfx::Size(460, 270);
}

bool TaskManagerView::AcceleratorPressed(const ui::Accelerator& accelerator) {
  DCHECK_EQ(ui::VKEY_W, accelerator.key_code());
  DCHECK_EQ(ui::EF_CONTROL_DOWN, accelerator.modifiers());
  GetWidget()->Close();
  return true;
}

// static
void TaskManagerView::Show(Browser* browser) {
#if defined(OS_WIN)
  // In Windows Metro it's not good to open this native window.
  DCHECK(!win8::IsSingleWindowMetroMode());
#endif
  // In ash we can come here through the ChromeShellDelegate. If there is no
  // browser window at that time of the call, browser could be passed as NULL.
  const chrome::HostDesktopType desktop_type =
      browser ? browser->host_desktop_type() : chrome::HOST_DESKTOP_TYPE_ASH;

  if (instance_) {
    // If there's a Task manager window open already, just activate it.
    instance_->GetWidget()->Activate();
    return;
  }
  instance_ = new TaskManagerView(desktop_type);
  gfx::NativeWindow window =
      browser ? browser->window()->GetNativeWindow() : NULL;
#if defined(USE_ASH)
  if (!window)
    window = ash::wm::GetActiveWindow();
#endif
  DialogDelegate::CreateDialogWidget(instance_, window, NULL);
  instance_->InitAlwaysOnTopState();
  instance_->model_->StartUpdating();
#if defined(OS_WIN)
  // Set the app id for the task manager to the app id of its parent browser. If
  // no parent is specified, the app id will default to that of the initial
  // process.
  if (browser) {
    ui::win::SetAppIdForWindow(
        ShellIntegration::GetChromiumModelIdForProfile(
            browser->profile()->GetPath()),
        views::HWNDForWidget(instance_->GetWidget()));
  }
#endif
  instance_->GetWidget()->Show();

  // Set the initial focus to the list of tasks.
  views::FocusManager* focus_manager = instance_->GetFocusManager();
  if (focus_manager)
    focus_manager->SetFocusedView(instance_->tab_table_);

#if defined(USE_ASH)
  CreateShelfItemForDialog(IDR_AURA_LAUNCHER_ICON_TASK_MANAGER,
                           instance_->GetWidget()->GetNativeWindow());
#endif
}

// ButtonListener implementation.
void TaskManagerView::ButtonPressed(
    views::Button* sender,
    const ui::Event& event) {
  typedef ui::ListSelectionModel::SelectedIndices SelectedIndices;
  DCHECK_EQ(kill_button_, sender);
  SelectedIndices selection(tab_table_->selection_model().selected_indices());
  for (SelectedIndices::const_reverse_iterator i = selection.rbegin();
        i != selection.rend(); ++i) {
    task_manager_->KillProcess(*i);
  }
}

// DialogDelegate implementation.
bool TaskManagerView::CanResize() const {
  return true;
}

bool TaskManagerView::CanMaximize() const {
  return true;
}

bool TaskManagerView::ExecuteWindowsCommand(int command_id) {
  return false;
}

base::string16 TaskManagerView::GetWindowTitle() const {
  return l10n_util::GetStringUTF16(IDS_TASK_MANAGER_TITLE);
}

std::string TaskManagerView::GetWindowName() const {
  return prefs::kTaskManagerWindowPlacement;
}

int TaskManagerView::GetDialogButtons() const {
  return ui::DIALOG_BUTTON_NONE;
}

void TaskManagerView::WindowClosing() {
  // Now that the window is closed, we can allow a new one to be opened.
  // (WindowClosing comes in asynchronously from the call to Close() and we
  // may have already opened a new instance).
  if (instance_ == this)
    instance_ = NULL;
  task_manager_->OnWindowClosed();
}

bool TaskManagerView::UseNewStyleForThisDialog() const {
  return false;
}

// views::TableViewObserver implementation.
void TaskManagerView::OnSelectionChanged() {
  const ui::ListSelectionModel::SelectedIndices& selection(
      tab_table_->selection_model().selected_indices());
  bool selection_contains_browser_process = false;
  for (size_t i = 0; i < selection.size(); ++i) {
    if (task_manager_->IsBrowserProcess(selection[i])) {
      selection_contains_browser_process = true;
      break;
    }
  }
  kill_button_->SetEnabled(!selection_contains_browser_process &&
                           !selection.empty());
}

void TaskManagerView::OnDoubleClick() {
  ActivateFocusedTab();
}

void TaskManagerView::OnKeyDown(ui::KeyboardCode keycode) {
  if (keycode == ui::VKEY_RETURN)
    ActivateFocusedTab();
}

void TaskManagerView::LinkClicked(views::Link* source, int event_flags) {
  DCHECK_EQ(about_memory_link_, source);
  task_manager_->OpenAboutMemory(desktop_type_);
}

void TaskManagerView::ShowContextMenuForView(views::View* source,
                                             const gfx::Point& point,
                                             ui::MenuSourceType source_type) {
  UpdateStatsCounters();
  ui::SimpleMenuModel menu_model(this);
  for (std::vector<ui::TableColumn>::iterator i(columns_.begin());
       i != columns_.end(); ++i) {
    menu_model.AddCheckItem(i->id, l10n_util::GetStringUTF16(i->id));
  }
  menu_runner_.reset(new views::MenuRunner(&menu_model));
  if (menu_runner_->RunMenuAt(GetWidget(), NULL, gfx::Rect(point, gfx::Size()),
                              views::MenuItemView::TOPLEFT, source_type,
                              views::MenuRunner::CONTEXT_MENU) ==
      views::MenuRunner::MENU_DELETED)
    return;
}

bool TaskManagerView::IsCommandIdChecked(int id) const {
  return tab_table_->IsColumnVisible(id);
}

bool TaskManagerView::IsCommandIdEnabled(int id) const {
  return true;
}

bool TaskManagerView::GetAcceleratorForCommandId(
    int command_id,
    ui::Accelerator* accelerator) {
  return false;
}

void TaskManagerView::ExecuteCommand(int id, int event_flags) {
  tab_table_->SetColumnVisibility(id, !tab_table_->IsColumnVisible(id));
}

void TaskManagerView::InitAlwaysOnTopState() {
  is_always_on_top_ = false;
  if (GetSavedAlwaysOnTopState(&is_always_on_top_))
    GetWidget()->SetAlwaysOnTop(is_always_on_top_);
}

void TaskManagerView::ActivateFocusedTab() {
  const int active_row = tab_table_->selection_model().active();
  if (active_row != -1)
    task_manager_->ActivateProcess(active_row);
}

bool TaskManagerView::GetSavedAlwaysOnTopState(bool* always_on_top) const {
  if (!g_browser_process->local_state())
    return false;

  const base::DictionaryValue* dictionary =
      g_browser_process->local_state()->GetDictionary(GetWindowName().c_str());
  return dictionary &&
      dictionary->GetBoolean("always_on_top", always_on_top) && always_on_top;
}

}  // namespace

namespace chrome {

// Declared in browser_dialogs.h so others don't need to depend on our header.
void ShowTaskManager(Browser* browser) {
  TaskManagerView::Show(browser);
}

}  // namespace chrome

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