Moves common code in ash/wm/overview to ash/common/wm/overview

ash/wm/overview/window_selector_item.h

-// Copyright 2013 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 ASH_WM_OVERVIEW_WINDOW_SELECTOR_ITEM_H_
-#define ASH_WM_OVERVIEW_WINDOW_SELECTOR_ITEM_H_
-
-#include <memory>
-
-#include "ash/ash_export.h"
-#include "ash/common/wm_window_observer.h"
-#include "ash/wm/overview/scoped_transform_overview_window.h"
-#include "base/macros.h"
-#include "ui/gfx/geometry/insets.h"
-#include "ui/gfx/geometry/rect.h"
-#include "ui/views/controls/button/button.h"
-#include "ui/views/controls/button/label_button.h"
-#include "ui/views/widget/widget.h"
-
-namespace views {
-class ImageButton;
-}
-
-namespace ash {
-
-class WindowSelector;
-class WmWindow;
-
-// This class represents an item in overview mode.
-class ASH_EXPORT WindowSelectorItem : public views::ButtonListener,
-                                      public WmWindowObserver {
- public:
-  class OverviewLabelButton : public views::LabelButton {
-   public:
-    OverviewLabelButton(views::ButtonListener* listener,
-                        const base::string16& text);
-
-    ~OverviewLabelButton() override;
-
-    // Makes sure that text is readable with |background_color|.
-    void SetBackgroundColor(SkColor background_color);
-
-    void set_padding(const gfx::Insets& padding) { padding_ = padding; }
-
-   protected:
-    // views::LabelButton:
-    gfx::Rect GetChildAreaBounds() override;
-
-   private:
-    // Padding on all sides to correctly place the text inside the view.
-    gfx::Insets padding_;
-
-    DISALLOW_COPY_AND_ASSIGN(OverviewLabelButton);
-  };
-
-  WindowSelectorItem(WmWindow* window, WindowSelector* window_selector);
-  ~WindowSelectorItem() override;
-
-  WmWindow* GetWindow();
-
-  // Returns the root window on which this item is shown.
-  WmWindow* root_window() { return root_window_; }
-
-  // Returns true if |target| is contained in this WindowSelectorItem.
-  bool Contains(const WmWindow* target) const;
-
-  // Restores and animates the managed window to it's non overview mode state.
-  void RestoreWindow();
-
-  // Forces the managed window to be shown (ie not hidden or minimized) when
-  // calling RestoreWindow().
-  void ShowWindowOnExit();
-
-  // Dispatched before beginning window overview. This will do any necessary
-  // one time actions such as restoring minimized windows.
-  void PrepareForOverview();
-
-  // Calculates and returns an optimal scale ratio. With MD this is only
-  // taking into account |size.height()| as the width can vary. Without MD this
-  // returns the scale that allows the item to fully fit within |size|.
-  float GetItemScale(const gfx::Size& size);
-
-  // Sets the bounds of this window selector item to |target_bounds| in the
-  // |root_window_| root window. The bounds change will be animated as specified
-  // by |animation_type|.
-  void SetBounds(const gfx::Rect& target_bounds,
-                 OverviewAnimationType animation_type);
-
-  // Activates or deactivates selection depending on |selected|.
-  // Currently does nothing unless Material Design is enabled. With Material
-  // Design the item's caption is shown transparent in selected state and blends
-  // with the selection widget.
-  void SetSelected(bool selected);
-
-  // Recomputes the positions for the windows in this selection item. This is
-  // dispatched when the bounds of a window change.
-  void RecomputeWindowTransforms();
-
-  // Sends an accessibility event indicating that this window became selected
-  // so that it's highlighted and announced if accessibility features are
-  // enabled.
-  void SendAccessibleSelectionEvent();
-
-  // Sets if the item is dimmed in the overview. Changing the value will also
-  // change the visibility of the transform windows.
-  void SetDimmed(bool dimmed);
-  bool dimmed() const { return dimmed_; }
-
-  const gfx::Rect& target_bounds() const { return target_bounds_; }
-
-  // views::ButtonListener:
-  void ButtonPressed(views::Button* sender, const ui::Event& event) override;
-
-  // WmWindowObserver:
-  void OnWindowDestroying(WmWindow* window) override;
-  void OnWindowTitleChanged(WmWindow* window) override;
-
- private:
-  class CaptionContainerView;
-  friend class WindowSelectorTest;
-
-  // Sets the bounds of this selector's items to |target_bounds| in
-  // |root_window_|. The bounds change will be animated as specified
-  // by |animation_type|.
-  void SetItemBounds(const gfx::Rect& target_bounds,
-                     OverviewAnimationType animation_type);
-
-  // Changes the opacity of all the windows the item owns.
-  void SetOpacity(float opacity);
-
-  // Updates the window label bounds.
-  void UpdateWindowLabel(const gfx::Rect& window_bounds,
-                         OverviewAnimationType animation_type);
-
-  // Creates the window label.
-  void CreateWindowLabel(const base::string16& title);
-
-  // Updates the close button's and title label's bounds. Any change in bounds
-  // will be animated from the current bounds to the new bounds as per the
-  // |animation_type|.
-  void UpdateHeaderLayout(OverviewAnimationType animation_type);
-
-  // Updates the close buttons accessibility name.
-  void UpdateCloseButtonAccessibilityName();
-
-  // True if the item is being shown in the overview, false if it's being
-  // filtered.
-  bool dimmed_;
-
-  // The root window this item is being displayed on.
-  WmWindow* root_window_;
-
-  // The contained Window's wrapper.
-  ScopedTransformOverviewWindow transform_window_;
-
-  // The target bounds this selector item is fit within.
-  gfx::Rect target_bounds_;
-
-  // True if running SetItemBounds. This prevents recursive calls resulting from
-  // the bounds update when calling ::wm::RecreateWindowLayers to copy
-  // a window layer for display on another monitor.
-  bool in_bounds_update_;
-
-  // Label displaying its name (active tab for tabbed windows).
-  // With Material Design this Widget owns |caption_container_view_| and is
-  // shown above the |transform_window_|.
-  // Otherwise it is shown under the window.
-  std::unique_ptr<views::Widget> window_label_;
-
-  // Label background widget used to fade in opacity when moving selection.
-  std::unique_ptr<views::Widget> window_label_selector_;
-
-  // Container view that owns |window_label_button_view_| and |close_button_|.
-  // Only used with Material Design.
-  CaptionContainerView* caption_container_view_;
-
-  // View for the label below the window or (with material design) above it.
-  OverviewLabelButton* window_label_button_view_;
-
-  // The close buttons widget container. Not used with Material Design.
-  std::unique_ptr<views::Widget> close_button_widget_;
-
-  // A close button for the window in this item. Owned by the
-  // |caption_container_view_| with Material Design or by |close_button_widget_|
-  // otherwise.
-  views::ImageButton* close_button_;
-
-  // Pointer to the WindowSelector that owns the WindowGrid containing |this|.
-  // Guaranteed to be non-null for the lifetime of |this|.
-  WindowSelector* window_selector_;
-
-  DISALLOW_COPY_AND_ASSIGN(WindowSelectorItem);
-};
-
-}  // namespace ash
-
-#endif  // ASH_WM_OVERVIEW_WINDOW_SELECTOR_ITEM_H_