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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_INPUT_RENDER_INPUT_ROUTER_DELEGATE_H_
#define COMPONENTS_INPUT_RENDER_INPUT_ROUTER_DELEGATE_H_
#include <memory>
#include "cc/trees/render_frame_metadata.h"
#include "components/viz/common/resources/peak_gpu_memory_tracker.h"
#include "third_party/blink/public/common/input/web_input_event.h"
#include "third_party/blink/public/mojom/input/input_event_result.mojom-shared.h"
#include "third_party/blink/public/mojom/input/input_handler.mojom.h"
#include "ui/gfx/delegated_ink_point.h"
namespace input {
class RenderWidgetHostViewInput;
class RenderInputRouterIterator;
class RenderWidgetHostInputEventRouter;
class TouchEmulator;
class StylusInterface;
class COMPONENT_EXPORT(INPUT) RenderInputRouterDelegate {
public:
virtual ~RenderInputRouterDelegate() = default;
virtual RenderWidgetHostViewInput* GetPointerLockView() = 0;
virtual std::optional<bool> IsDelegatedInkHovering() = 0;
virtual std::unique_ptr<RenderInputRouterIterator>
GetEmbeddedRenderInputRouters() = 0;
virtual RenderWidgetHostInputEventRouter* GetInputEventRouter() = 0;
// Forwards |delegated_ink_point| to viz over IPC to be drawn as part of
// delegated ink trail, resetting the |ended_delegated_ink_trail| flag.
virtual void ForwardDelegatedInkPoint(
gfx::DelegatedInkPoint& delegated_ink_point,
bool& ended_delegated_ink_trail) = 0;
// Instructs viz to reset prediction for delegated ink trails, indicating that
// the trail has ended. Updates the |ended_delegated_ink_trail| flag to
// reflect this change.
virtual void ResetDelegatedInkPointPrediction(
bool& ended_delegated_ink_trail) = 0;
virtual bool IsIgnoringWebInputEvents(
const blink::WebInputEvent& event) const = 0;
virtual bool PreHandleGestureEvent(const blink::WebGestureEvent& event) = 0;
virtual void NotifyObserversOfInputEvent(const blink::WebInputEvent& event,
bool dispatched_to_renderer) = 0;
virtual void NotifyObserversOfInputEventAcks(
blink::mojom::InputEventResultSource ack_source,
blink::mojom::InputEventResultState ack_result,
const blink::WebInputEvent& event) = 0;
// Returns an pointer to the existing touch emulator serving this host if
// |create_if_necessary| is false. If true, calling this function will force
// creation of a TouchEmulator.
virtual TouchEmulator* GetTouchEmulator(bool create_if_necessary) = 0;
virtual std::unique_ptr<viz::PeakGpuMemoryTracker> MakePeakGpuMemoryTracker(
viz::PeakGpuMemoryTracker::Usage usage) = 0;
// Called upon event ack receipt from the renderer.
virtual void OnWheelEventAck(
const input::MouseWheelEventWithLatencyInfo& event,
blink::mojom::InputEventResultSource ack_source,
blink::mojom::InputEventResultState ack_result) = 0;
// Returns true iff the renderer process was initialized and it hasn't died
// yet.
virtual bool IsInitializedAndNotDead() = 0;
// Invoked before an input event is sent to the renderer. This provides the
// delegate an opportunity to be informed that the input event is being
// dispatched to the widget.
virtual void OnInputEventPreDispatch(const blink::WebInputEvent& event) = 0;
// Called when an invalid input event source is sent from the renderer.
virtual void OnInvalidInputEventSource() = 0;
// Notifies when an input event is ignored, see `IsIgnoringWebInputEvents`
// above.
virtual void OnInputIgnored(const blink::WebInputEvent& event) = 0;
virtual StylusInterface* GetStylusInterface() = 0;
// Returns whether the RenderInputRouter is hidden or not.
virtual bool IsHidden() const = 0;
// Called by |RenderInputRouter::input_event_ack_timeout_| when an input event
// timed out without getting an ack from the renderer. |ack_timeout_ts|
// denotes the timestamp where this timeout was detected by RenderInputRouter.
virtual void OnInputEventAckTimeout(base::TimeTicks ack_timeout_ts) = 0;
// Notifies the delegate that RenderInputRouter is responsive.
virtual void RendererIsResponsive() = 0;
// Passes the overscroll parameters to the delegate.
virtual void DidOverscroll(blink::mojom::DidOverscrollParamsPtr params) = 0;
};
} // namespace input
#endif // COMPONENTS_INPUT_RENDER_INPUT_ROUTER_DELEGATE_H_
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