File: render_input_router_delegate_impl.h

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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef COMPONENTS_VIZ_SERVICE_INPUT_RENDER_INPUT_ROUTER_DELEGATE_IMPL_H_
#define COMPONENTS_VIZ_SERVICE_INPUT_RENDER_INPUT_ROUTER_DELEGATE_IMPL_H_

#include <memory>

#include "base/memory/scoped_refptr.h"
#include "components/input/event_with_latency_info.h"
#include "components/input/render_input_router.mojom.h"
#include "components/input/render_input_router_delegate.h"
#include "components/input/render_input_router_iterator.h"
#include "components/viz/common/resources/peak_gpu_memory_tracker.h"
#include "components/viz/common/surfaces/frame_sink_id.h"
#include "components/viz/service/viz_service_export.h"

namespace input {
class RenderWidgetHostViewInput;
class RenderInputRouterIterator;
class RenderWidgetHostInputEventRouter;
class TouchEmulator;
}  // namespace input

namespace viz {

class GpuServiceImpl;

// RenderInputRouterDelegateImpl provides RenderInputRouter access to input
// handling related information and functionality within Viz.
class VIZ_SERVICE_EXPORT RenderInputRouterDelegateImpl
    : public input::RenderInputRouterDelegate {
 public:
  class Delegate {
   public:
    virtual std::unique_ptr<input::RenderInputRouterIterator>
    GetEmbeddedRenderInputRouters(const FrameSinkId& id) = 0;
    virtual input::mojom::RenderInputRouterDelegateClient*
    GetRIRDelegateClientRemote(const FrameSinkId& frame_sink_id) = 0;
    virtual std::optional<bool> IsDelegatedInkHovering(
        const FrameSinkId& frame_sink_id) = 0;
    virtual GpuServiceImpl* GetGpuService() = 0;
  };

  RenderInputRouterDelegateImpl(
      scoped_refptr<input::RenderWidgetHostInputEventRouter> rwhier,
      Delegate& delegate,
      const FrameSinkId& frame_sink_id);

  ~RenderInputRouterDelegateImpl() override;

  // RenderInputRouterDelegate overrides.
  input::RenderWidgetHostViewInput* GetPointerLockView() override;
  std::optional<bool> IsDelegatedInkHovering() override;
  std::unique_ptr<input::RenderInputRouterIterator>
  GetEmbeddedRenderInputRouters() override;
  input::RenderWidgetHostInputEventRouter* GetInputEventRouter() override;
  void ForwardDelegatedInkPoint(gfx::DelegatedInkPoint& delegated_ink_point,
                                bool& ended_delegated_ink_trail) override {}
  void ResetDelegatedInkPointPrediction(
      bool& ended_delegated_ink_trail) override {}
  bool IsIgnoringWebInputEvents(
      const blink::WebInputEvent& event) const override;
  bool PreHandleGestureEvent(const blink::WebGestureEvent& event) override;
  void NotifyObserversOfInputEvent(const blink::WebInputEvent& event,
                                   bool dispatched_to_renderer) override;
  void NotifyObserversOfInputEventAcks(
      blink::mojom::InputEventResultSource ack_source,
      blink::mojom::InputEventResultState ack_result,
      const blink::WebInputEvent& event) override;
  input::TouchEmulator* GetTouchEmulator(bool create_if_necessary) override;
  std::unique_ptr<PeakGpuMemoryTracker> MakePeakGpuMemoryTracker(
      PeakGpuMemoryTracker::Usage usage) override;
  void OnWheelEventAck(
      const input::MouseWheelEventWithLatencyInfo& event,
      blink::mojom::InputEventResultSource ack_source,
      blink::mojom::InputEventResultState ack_result) override {}
  bool IsInitializedAndNotDead() override;
  void OnInputEventPreDispatch(const blink::WebInputEvent& event) override {}
  void OnInvalidInputEventSource() override;
  void OnInputIgnored(const blink::WebInputEvent& event) override {}
  input::StylusInterface* GetStylusInterface() override;
  bool IsHidden() const override;
  void OnInputEventAckTimeout(base::TimeTicks ack_timeout_ts) override;
  void RendererIsResponsive() override;
  void DidOverscroll(blink::mojom::DidOverscrollParamsPtr params) override;

  void SetIsHidden(bool is_hidden) { is_hidden_ = is_hidden; }

 private:
  // Indicates whether the RenderInputRouter associated with this RIRDelegate is
  // hidden or not.
  bool is_hidden_ = true;
  bool is_responsive_ = true;
  scoped_refptr<input::RenderWidgetHostInputEventRouter> rwhier_;
  raw_ref<Delegate> delegate_;
  const FrameSinkId frame_sink_id_;
};

}  // namespace viz

#endif  // COMPONENTS_VIZ_SERVICE_INPUT_RENDER_INPUT_ROUTER_DELEGATE_IMPL_H_