chromeos: Move files in //ash/common to //ash

ash/common/wm/overview/scoped_transform_overview_window.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_COMMON_WM_OVERVIEW_SCOPED_TRANSFORM_OVERVIEW_WINDOW_H_
-#define ASH_COMMON_WM_OVERVIEW_SCOPED_TRANSFORM_OVERVIEW_WINDOW_H_
-
-#include <memory>
-#include <vector>
-
-#include "ash/ash_export.h"
-#include "ash/common/wm/overview/overview_animation_type.h"
-#include "base/macros.h"
-#include "base/memory/weak_ptr.h"
-#include "third_party/skia/include/core/SkColor.h"
-#include "ui/events/event_handler.h"
-#include "ui/gfx/geometry/size.h"
-#include "ui/gfx/transform.h"
-
-class SkRegion;
-
-namespace gfx {
-class Rect;
-}
-
-namespace views {
-class Widget;
-}
-
-namespace ash {
-
-class ScopedOverviewAnimationSettings;
-class WmWindow;
-
-// Manages a window, and it's transient children, in the overview mode. This
-// class allows transforming the windows with a helper to determine the best
-// fit in certain bounds. The window's state is restored on destruction of this
-// object.
-class ASH_EXPORT ScopedTransformOverviewWindow : public ui::EventHandler {
- public:
-  class OverviewContentMask;
-  using ScopedAnimationSettings =
-      std::vector<std::unique_ptr<ScopedOverviewAnimationSettings>>;
-
-  // 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|.
-  static float GetItemScale(const gfx::Size& source,
-                            const gfx::Size& target,
-                            int top_view_inset,
-                            int title_height);
-
-  // Returns |rect| having been shrunk to fit within |bounds| (preserving the
-  // aspect ratio). Takes into account a window header that is |top_view_inset|
-  // tall in the original window getting replaced by a window caption that is
-  // |title_height| tall in transformed window.
-  static gfx::Rect ShrinkRectToFitPreservingAspectRatio(const gfx::Rect& rect,
-                                                        const gfx::Rect& bounds,
-                                                        int top_view_inset,
-                                                        int title_height);
-
-  // Returns the transform turning |src_rect| into |dst_rect|.
-  static gfx::Transform GetTransformForRect(const gfx::Rect& src_rect,
-                                            const gfx::Rect& dst_rect);
-
-  explicit ScopedTransformOverviewWindow(WmWindow* window);
-  ~ScopedTransformOverviewWindow() override;
-
-  // Starts an animation sequence which will use animation settings specified by
-  // |animation_type|. The |animation_settings| container is populated with
-  // scoped entities and the container should be destroyed at the end of the
-  // animation sequence.
-  //
-  // Example:
-  //  ScopedTransformOverviewWindow overview_window(window);
-  //  ScopedTransformOverviewWindow::ScopedAnimationSettings scoped_settings;
-  //  overview_window.BeginScopedAnimation(
-  //      OverviewAnimationType::OVERVIEW_ANIMATION_SELECTOR_ITEM_SCROLL_CANCEL,
-  //      &animation_settings);
-  //  // Calls to SetTransform & SetOpacity will use the same animation settings
-  //  // until scoped_settings is destroyed.
-  //  overview_window.SetTransform(root_window, new_transform);
-  //  overview_window.SetOpacity(1);
-  void BeginScopedAnimation(OverviewAnimationType animation_type,
-                            ScopedAnimationSettings* animation_settings);
-
-  // Returns true if this window selector window contains the |target|.
-  bool Contains(const WmWindow* target) const;
-
-  // Returns the original target bounds of all transformed windows.
-  gfx::Rect GetTargetBoundsInScreen() const;
-
-  // Calculates the bounds of a |window_| after being transformed to the
-  // selector's space. Those bounds are a union of all regular (normal and
-  // panel) windows in the |window_|'s transient hierarchy. The returned Rect is
-  // in virtual screen coordinates. The returned bounds are adjusted to allow
-  // the original |window_|'s header to be hidden.
-  gfx::Rect GetTransformedBounds() const;
-
-  // Returns TOP_VIEW_COLOR property of |window_| unless there are transient
-  // ancestors in which case returns SK_ColorTRANSPARENT.
-  SkColor GetTopColor() const;
-
-  // Returns TOP_VIEW_INSET property of |window_| unless there are transient
-  // ancestors in which case returns 0.
-  int GetTopInset() const;
-
-  // Restores and animates the managed window to it's non overview mode state.
-  void RestoreWindow();
-
-  // Informs the ScopedTransformOverviewWindow that the window being watched was
-  // destroyed. This resets the internal window pointer.
-  void OnWindowDestroyed();
-
-  // Prepares for overview mode by doing any necessary actions before entering.
-  void PrepareForOverview();
-
-  // Applies the |transform| to the overview window and all of its transient
-  // children.
-  void SetTransform(WmWindow* root_window, const gfx::Transform& transform);
-
-  // Set's the opacity of the managed windows.
-  void SetOpacity(float opacity);
-
-  // Hides the window header whose size is given in |TOP_VIEW_INSET|
-  // window property.
-  void HideHeader();
-
-  // Shows the window header that is hidden by HideHeader().
-  void ShowHeader();
-
-  // Creates/Deletes a mirror window for minimized windows.
-  void UpdateMirrorWindowForMinimizedState();
-
-  WmWindow* window() const { return window_; }
-
-  // Closes the transient root of the window managed by |this|.
-  void Close();
-
-  // Returns the window used to show the content in overview mdoe.
-  // For minmiezd window, this will be a window that hosts mirrored layers.
-  WmWindow* GetOverviewWindow() const;
-
-  // Ensures that a window is visible by setting its opacity to 1.
-  void EnsureVisible();
-
-  // Returns the window created for minimized window, or nullptr
-  // if it does not exit.
-  WmWindow* GetOverviewWindowForMinimizedState() const;
-
-  // ui::EventHandler:
-  void OnGestureEvent(ui::GestureEvent* event) override;
-  void OnMouseEvent(ui::MouseEvent* event) override;
-
- private:
-  friend class WindowSelectorTest;
-
-  // Closes the window managed by |this|.
-  void CloseWidget();
-
-  void CreateMirrorWindowForMinimizedState();
-
-  // Makes Close() execute synchronously when used in tests.
-  static void SetImmediateCloseForTests();
-
-  // A weak pointer to the real window in the overview.
-  WmWindow* window_;
-
-  // Original window shape, if it was set on a window.
-  std::unique_ptr<SkRegion> original_window_shape_;
-
-  // True after the |original_window_shape_| has been set or after it has
-  // been determined that window shape was not originally set on the |window_|.
-  bool determined_original_window_shape_;
-
-  // Tracks if this window was ignored by the shelf.
-  bool ignored_by_shelf_;
-
-  // True if the window has been transformed for overview mode.
-  bool overview_started_;
-
-  // The original transform of the window before entering overview mode.
-  gfx::Transform original_transform_;
-
-  // The original opacity of the window before entering overview mode.
-  float original_opacity_;
-
-  // A window that holds the content for minimized window.
-  std::unique_ptr<views::Widget> minimized_widget_;
-
-  base::WeakPtrFactory<ScopedTransformOverviewWindow> weak_ptr_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(ScopedTransformOverviewWindow);
-};
-
-}  // namespace ash
-
-#endif  // ASH_COMMON_WM_OVERVIEW_SCOPED_TRANSFORM_OVERVIEW_WINDOW_H_