text: // Copyright 2018 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.
  
  // Copied with modifications from ash/accessibility, refactored for use in
  // chromecast.
  
  #ifndef CHROMECAST_GRAPHICS_ACCESSIBILITY_FOCUS_RING_LAYER_H_
  #define CHROMECAST_GRAPHICS_ACCESSIBILITY_FOCUS_RING_LAYER_H_
  
  #include "chromecast/graphics/accessibility/accessibility_layer.h"
  #include "third_party/abseil-cpp/absl/types/optional.h"
  #include "third_party/skia/include/core/SkColor.h"
  #include "ui/compositor/compositor_animation_observer.h"
  #include "ui/compositor/layer_delegate.h"
  #include "ui/gfx/geometry/rect.h"
  
  namespace chromecast {
  
  // FocusRingLayer draws a focus ring at a given global rectangle.
  class FocusRingLayer : public AccessibilityLayer {
   public:
    explicit FocusRingLayer(aura::Window* root_window,
                            AccessibilityLayerDelegate* delegate);
  
    FocusRingLayer(const FocusRingLayer&) = delete;
    FocusRingLayer& operator=(const FocusRingLayer&) = delete;
  
    ~FocusRingLayer() override;
  
    // AccessibilityLayer overrides:
    bool CanAnimate() const override;
    int GetInset() const override;
  
    // Set a custom color, or reset to the default.
    void SetColor(SkColor color);
    void ResetColor();
  
   protected:
    bool has_custom_color() { return custom_color_.has_value(); }
    SkColor custom_color() { return *custom_color_; }
  
   private:
    // ui::LayerDelegate overrides:
    void OnPaintLayer(const ui::PaintContext& context) override;
  
    absl::optional<SkColor> custom_color_;
  };
  
  }  // namespace chromecast
  
  #endif  // CHROMECAST_GRAPHICS_ACCESSIBILITY_FOCUS_RING_LAYER_H_
  