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// 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 CONTENT_BROWSER_RENDERER_HOST_INPUT_INPUT_ROUTER_CLIENT_H_
#define CONTENT_BROWSER_RENDERER_HOST_INPUT_INPUT_ROUTER_CLIENT_H_
#include "cc/input/touch_action.h"
#include "content/browser/renderer_host/event_with_latency_info.h"
#include "content/common/content_export.h"
#include "content/public/browser/native_web_keyboard_event.h"
#include "content/public/common/input_event_ack_source.h"
#include "content/public/common/input_event_ack_state.h"
#include "third_party/blink/public/platform/web_input_event.h"
namespace ui {
class LatencyInfo;
struct DidOverscrollParams;
}
namespace content {
class CONTENT_EXPORT InputRouterClient {
public:
virtual ~InputRouterClient() {}
// Called just prior to events being sent to the renderer, giving the client
// a chance to perform in-process event filtering.
// The returned disposition will yield the following behavior:
// * |NOT_CONSUMED| will result in |input_event| being sent as usual.
// * |CONSUMED| or |NO_CONSUMER_EXISTS| will trigger the appropriate ack.
// * |UNKNOWN| will result in |input_event| being dropped.
virtual InputEventAckState FilterInputEvent(
const blink::WebInputEvent& input_event,
const ui::LatencyInfo& latency_info) = 0;
// Called each time a WebInputEvent IPC is sent.
virtual void IncrementInFlightEventCount() = 0;
// Called each time a WebInputEvent ACK IPC is received.
virtual void DecrementInFlightEventCount(InputEventAckSource ack_source) = 0;
// Called when the renderer notifies that it has touch event handlers.
virtual void OnHasTouchEventHandlers(bool has_handlers) = 0;
// Called when the router has received an overscroll notification from the
// renderer.
virtual void DidOverscroll(const ui::DidOverscrollParams& params) = 0;
// Called when the router has received a whitelisted touch action notification
// from the renderer.
virtual void OnSetWhiteListedTouchAction(cc::TouchAction touch_action) = 0;
// Called when a renderer fling has terminated.
virtual void DidStopFlinging() = 0;
// Called when a GSB has started scrolling a viewport.
virtual void DidStartScrollingViewport() = 0;
// Called when the input router generates an event. It is intended that the
// client will do some processing on |gesture_event| and then send it back
// to the InputRouter via SendGestureEvent.
virtual void ForwardGestureEventWithLatencyInfo(
const blink::WebGestureEvent& gesture_event,
const ui::LatencyInfo& latency_info) = 0;
// Called when the input router generates a wheel event. It is intended that
// the client will do some processing on |wheel_event| and then send it back
// to the InputRouter via SendWheelEvent.
virtual void ForwardWheelEventWithLatencyInfo(
const blink::WebMouseWheelEvent& wheel_event,
const ui::LatencyInfo& latency_info) = 0;
// Called to see if there is an ongoing wheel scroll sequence on the client.
virtual bool IsWheelScrollInProgress() = 0;
// Called to toggle whether the RenderWidgetHost should capture all mouse
// input.
virtual void SetMouseCapture(bool capture) = 0;
};
} // namespace content
#endif // CONTENT_BROWSER_RENDERER_HOST_INPUT_INPUT_ROUTER_CLIENT_H_
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