Expose all reusable task manager view code so it can be used by Mac

chrome/browser/ui/views/new_task_manager_view.h

 // Copyright 2015 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.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_NEW_TASK_MANAGER_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_NEW_TASK_MANAGER_VIEW_H_
 
 #include <vector>
 
 #include "chrome/browser/ui/host_desktop.h"
+#include "chrome/browser/ui/task_manager/task_manager_table_model.h"
 #include "ui/base/models/simple_menu_model.h"
 #include "ui/base/models/table_model.h"
 #include "ui/views/context_menu_controller.h"
 #include "ui/views/controls/button/label_button.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_observer.h"
 #include "ui/views/window/dialog_delegate.h"
 
 namespace views {
 class LabelButton;
 class Link;
 class TableView;
 class View;
 }  // namespace views
 
 namespace task_management {
 
-// A collection of data to be used in the construction of a task manager table
-// column.
-struct TableColumnData {
-  // The generated ID of the column. These can change from one build to another.
-  // Their values are controlled by the generation from generated_resources.grd.
-  int id;
-
-  // The alignment of the text displayed in this column.
-  ui::TableColumn::Alignment align;
-
-  // |width| and |percent| used to define the size of the column. See
-  // ui::TableColumn::width and ui::TableColumn::percent for details.
-  int width;
-  float percent;
-
-  // Is the column sortable.
-  bool sortable;
-
-  // Is the initial sort order ascending?
-  bool initial_sort_is_ascending;
-
-  // The default visibility of this column at startup of the table if no
-  // visibility is stored for it in the prefs.
-  bool default_visibility;
-};
-
-// The task manager table columns and their properties.
-extern const TableColumnData kColumns[];
-extern const size_t kColumnsSize;
-
-// Session Restore Keys.
-extern const char kSortColumnIdKey[];
-extern const char kSortIsAscendingKey[];
-
-// Returns the |column_id| as a string value to be used as keys in the user
-// preferences.
-std::string GetColumnIdAsString(int column_id);
+class TaskManagerTableModel;
 
 // The new task manager UI container.
 class NewTaskManagerView
-    : public views::ButtonListener,
+    : public TableViewDelegate,
+      public views::ButtonListener,
       public views::DialogDelegateView,
+      public views::TableGrouper,
       public views::TableViewObserver,
       public views::LinkListener,
       public views::ContextMenuController,
       public ui::SimpleMenuModel::Delegate {
  public:
   ~NewTaskManagerView() override;
 
   // Shows the Task Manager window, or re-activates an existing one.
   static void Show(Browser* browser);
 
   // Hides the Task Manager if it is showing.
   static void Hide();
 
+  // task_management::TableViewDelegate:
+  bool IsColumnVisible(int column_id) const override;
+  void SetColumnVisibility(int column_id, bool new_visibility) override;
+  bool IsTableSorted() const override;
+  TableSortDescriptor GetSortDescriptor() const override;
+  void ToggleSortOrder(int visible_column_index) override;
+
   // views::View:
   void Layout() override;
   gfx::Size GetPreferredSize() const override;
   bool AcceleratorPressed(const ui::Accelerator& accelerator) override;
   void ViewHierarchyChanged(
       const ViewHierarchyChangedDetails& details) override;
 
   // views::ButtonListener:
   void ButtonPressed(views::Button* sender, const ui::Event& event) override;
 
   // views::DialogDelegateView:
   bool CanResize() const override;
   bool CanMaximize() const override;
   bool CanMinimize() const override;
   bool ExecuteWindowsCommand(int command_id) override;
   base::string16 GetWindowTitle() const override;
   std::string GetWindowName() const override;
   int GetDialogButtons() const override;
   void WindowClosing() override;
   bool UseNewStyleForThisDialog() const override;
 
+  // views::TableGrouper:
+  void GetGroupRange(int model_index, views::GroupRange* range) override;
+
   // views::TableViewObserver:
   void OnSelectionChanged() override;
   void OnDoubleClick() override;
   void OnKeyDown(ui::KeyboardCode keycode) override;
 
   // views::LinkListener:
   void LinkClicked(views::Link* source, int event_flags) override;
 
   // views::ContextMenuController:
   void ShowContextMenuForView(views::View* source,
                               const gfx::Point& point,
                               ui::MenuSourceType source_type) override;
 
   // ui::SimpleMenuModel::Delegate:
   bool IsCommandIdChecked(int id) const override;
   bool IsCommandIdEnabled(int id) const override;
   bool GetAcceleratorForCommandId(int command_id,
                                   ui::Accelerator* accelerator) override;
   void ExecuteCommand(int id, int event_flags) override;
 
  private:
   friend class NewTaskManagerViewTest;
-  class TableModel;
 
   explicit NewTaskManagerView(chrome::HostDesktopType desktop_type);
 
   static NewTaskManagerView* GetInstanceForTests();
 
   // 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.
   void RetriveSavedAlwaysOnTopState();
 
-  // Restores the saved columns settings from a previous session into
-  // |columns_settings_| and updates the table view.
-  void RetrieveSavedColumnsSettingsAndUpdateTable();
-
-  // Stores the current values in |column_settings_| to the user prefs so that
-  // it can be restored later next time the task manager view is opened.
-  void StoreColumnsSettings();
-
-  void ToggleColumnVisibility(int column_id);
-
-  scoped_ptr<NewTaskManagerView::TableModel> table_model_;
+  scoped_ptr<TaskManagerTableModel> table_model_;
 
   scoped_ptr<views::MenuRunner> menu_runner_;
 
-  // Contains either the column settings retrieved from user preferences if it
-  // exists, or the default column settings.
-  // The columns settings are the visible columns and the last sorted column
-  // and the direction of the sort.
-  scoped_ptr<base::DictionaryValue> columns_settings_;
-
   // We need to own the text of the menu, the Windows API does not copy it.
   base::string16 always_on_top_menu_text_;
 
   views::LabelButton* kill_button_;
   views::Link* about_memory_link_;
   views::TableView* tab_table_;
   views::View* tab_table_parent_;
 
   // all possible columns, not necessarily visible
   std::vector<ui::TableColumn> columns_;
 
   // The host desktop type this task manager belongs to.
   const chrome::HostDesktopType desktop_type_;
 
   // True when the Task Manager window should be shown on top of other windows.
   bool is_always_on_top_;
 
   DISALLOW_COPY_AND_ASSIGN(NewTaskManagerView);
 };
 
 }  // namespace task_management
 
 #endif  // CHROME_BROWSER_UI_VIEWS_NEW_TASK_MANAGER_VIEW_H_