exo: Initial support for multiple displays in ARC

components/exo/shell_surface.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 COMPONENTS_EXO_SHELL_SURFACE_H_
 #define COMPONENTS_EXO_SHELL_SURFACE_H_
 
 #include <deque>
 #include <memory>
 #include <string>
@@ skipping 27 matching lines @@
 // This class provides functions for treating a surfaces like toplevel,
 // fullscreen or popup widgets, move, resize or maximize them, associate
 // metadata like title and class, etc.
 class ShellSurface : public SurfaceDelegate,
                      public SurfaceObserver,
                      public views::WidgetDelegate,
                      public views::View,
                      public ash::wm::WindowStateObserver,
                      public aura::WindowObserver,
                      public WMHelper::ActivationObserver,
-                     public WMHelper::AccessibilityObserver {
+                     public WMHelper::AccessibilityObserver,
+                     public WMHelper::DisplayConfigurationObserver {
  public:
   enum class BoundsMode { SHELL, CLIENT, FIXED };
 
   // The |origin| is in screen coordinates. When bounds are controlled by the
   // shell or fixed, it determines the initial position of the shell surface.
   // In that case, the position specified as part of the geometry is relative
   // to the shell surface.
   //
   // When bounds are controlled by the client, it represents the origin of a
   // coordinate system to which the position of the shell surface, specified
@@ skipping 14 matching lines @@
   void set_close_callback(const base::Closure& close_callback) {
     close_callback_ = close_callback;
   }
 
   // Set the callback to run when the surface is destroyed.
   void set_surface_destroyed_callback(
       const base::Closure& surface_destroyed_callback) {
     surface_destroyed_callback_ = surface_destroyed_callback;
   }
 
+  // Set the callback to run when the display configuration changed.
+  void set_display_config_changed_callback(
+      const base::Closure& display_config_changed_callback) {
+    display_config_changed_callback_ = display_config_changed_callback;
+  }
+
   // Set the callback to run when the surface state changed.
   using StateChangedCallback =
       base::Callback<void(ash::wm::WindowStateType old_state_type,
                           ash::wm::WindowStateType new_state_type)>;
   void set_state_changed_callback(
       const StateChangedCallback& state_changed_callback) {
     state_changed_callback_ = state_changed_callback;
   }
 
   // Set the callback to run when the client is asked to configure the surface.
@@ skipping 150 matching lines @@
   void OnWindowDestroying(aura::Window* window) override;
 
   // Overridden from WMHelper::ActivationObserver:
   void OnWindowActivated(
       aura::Window* gained_active,
       aura::Window* lost_active) override;
 
   // Overridden from WMHelper::AccessibilityObserver:
   void OnAccessibilityModeChanged() override;
 
+  // Overridden from WMHelper::DisplayConfigurationObserver:
+  void OnDisplayConfigurationChanged() override;
+
   // Overridden from ui::EventHandler:
   void OnKeyEvent(ui::KeyEvent* event) override;
   void OnMouseEvent(ui::MouseEvent* event) override;
 
   // Overridden from ui::AcceleratorTarget:
   bool AcceleratorPressed(const ui::Accelerator& accelerator) override;
 
   aura::Window* shadow_overlay() { return shadow_overlay_; }
   aura::Window* shadow_underlay() { return shadow_underlay_; }
 
@@ skipping 10 matching lines @@
     int resize_component;
   };
 
   // Creates the |widget_| for |surface_|. |show_state| is the initial state
   // of the widget (e.g. maximized).
   void CreateShellSurfaceWidget(ui::WindowShowState show_state);
 
   // Asks the client to configure its surface.
   void Configure();
 
+  aura::Window* GetDragWindow() const;

[reveman, 2017/03/06 19:02:13]

Can this be private? nit: please add a comment explaining what this returns

[Dominik Laskowski, 2017/03/08 23:13:23]

Already private. Done.

+
   // Attempt to start a drag operation. The type of drag operation to start is
   // determined by |component|.
   void AttemptToStartDrag(int component);
 
   // End current drag operation.
   void EndDrag(bool revert);
 
   // Returns true if surface is currently being resized.
   bool IsResizing() const;
 
   // Returns the "visible bounds" for the surface from the user's perspective.
   gfx::Rect GetVisibleBounds() const;
 
   // Returns the origin for the surface taking visible bounds and current
   // resize direction into account.
   gfx::Point GetSurfaceOrigin() const;
 
   // Updates the bounds of widget to match the current surface bounds.
   void UpdateWidgetBounds();
 
   // Updates the bounds of surface to match the current widget bounds.
   void UpdateSurfaceBounds();
 
   // Creates, deletes and update the shadow bounds based on
   // |pending_shadow_content_bounds_|.
   void UpdateShadow();
 
+  // In the coordinate system of the parent root window.
+  gfx::Point GetMouseLocation() const;
+
   views::Widget* widget_ = nullptr;
   Surface* surface_;
   aura::Window* parent_;
   const BoundsMode bounds_mode_;
   gfx::Point origin_;
   bool activatable_ = true;
   const bool can_minimize_;
   // Container Window Id (see ash/public/cpp/shell_window_ids.h)
   int container_;
   bool frame_enabled_ = false;
   bool shadow_enabled_ = false;
   bool pending_show_widget_ = false;
   base::string16 title_;
   std::string application_id_;
   gfx::Rect geometry_;
   gfx::Rect pending_geometry_;
   double scale_ = 1.0;
   double pending_scale_ = 1.0;
   base::Closure close_callback_;
   base::Closure surface_destroyed_callback_;
+  base::Closure display_config_changed_callback_;
   StateChangedCallback state_changed_callback_;
   ConfigureCallback configure_callback_;
   ScopedConfigure* scoped_configure_ = nullptr;
   bool ignore_window_bounds_changes_ = false;
   gfx::Vector2d origin_offset_;
   gfx::Vector2d pending_origin_offset_;
   gfx::Vector2d pending_origin_offset_accumulator_;
   int resize_component_ = HTCAPTION;  // HT constant (see ui/base/hit_test.h)
   int pending_resize_component_ = HTCAPTION;
   aura::Window* shadow_overlay_ = nullptr;
   aura::Window* shadow_underlay_ = nullptr;
   std::unique_ptr<ui::EventHandler> shadow_underlay_event_handler_;
   gfx::Rect shadow_content_bounds_;
   float shadow_background_opacity_ = 1.0;
   std::deque<Config> pending_configs_;
   std::unique_ptr<ash::WindowResizer> resizer_;
   std::unique_ptr<ScopedAnimationsDisabled> scoped_animations_disabled_;
   int top_inset_height_ = 0;
   int pending_top_inset_height_ = 0;
   bool shadow_underlay_in_surface_ = true;
 
   DISALLOW_COPY_AND_ASSIGN(ShellSurface);
 };
 
 }  // namespace exo
 
 #endif  // COMPONENTS_EXO_SHELL_SURFACE_H_