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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_H_
#define CONTENT_BROWSER_RENDERER_HOST_INPUT_INPUT_ROUTER_H_
#include "base/basictypes.h"
#include "content/port/browser/event_with_latency_info.h"
#include "content/port/common/input_event_ack_state.h"
#include "content/public/browser/native_web_keyboard_event.h"
#include "ipc/ipc_listener.h"
#include "third_party/WebKit/public/web/WebInputEvent.h"
namespace content {
class InputRouterClient;
// The InputRouter allows the embedder to customize how input events are
// sent to the renderer, and how responses are dispatched to the browser.
// While the router should respect the relative order in which events are
// received, it is free to customize when those events are dispatched.
class InputRouter : public IPC::Listener {
public:
virtual ~InputRouter() {}
// Should be called only in response to |SetNeedsFlush| requests made via
// the |InputRouterClient|.
virtual void Flush() = 0;
// Send and take ownership of the the given InputMsg_*. This should be used
// only for event types not associated with a WebInputEvent. Returns true on
// success and false otherwise.
virtual bool SendInput(scoped_ptr<IPC::Message> message) = 0;
// WebInputEvents
virtual void SendMouseEvent(
const MouseEventWithLatencyInfo& mouse_event) = 0;
virtual void SendWheelEvent(
const MouseWheelEventWithLatencyInfo& wheel_event) = 0;
virtual void SendKeyboardEvent(
const NativeWebKeyboardEvent& key_event,
const ui::LatencyInfo& latency_info) = 0;
virtual void SendGestureEvent(
const GestureEventWithLatencyInfo& gesture_event) = 0;
virtual void SendTouchEvent(
const TouchEventWithLatencyInfo& touch_event) = 0;
virtual void SendMouseEventImmediately(
const MouseEventWithLatencyInfo& mouse_event) = 0;
virtual void SendTouchEventImmediately(
const TouchEventWithLatencyInfo& touch_event) = 0;
virtual void SendGestureEventImmediately(
const GestureEventWithLatencyInfo& gesture_event) = 0;
// Returns the oldest queued or in-flight keyboard event sent to the router.
virtual const NativeWebKeyboardEvent* GetLastKeyboardEvent() const = 0;
// Returns |true| if the caller should immediately forward touch events to the
// router. When |false|, the caller can forego sending touch events, and
// instead consume them directly.
virtual bool ShouldForwardTouchEvent() const = 0;
// Returns |true| if the caller should immediately forward the provided
// |gesture_event| to the router.
virtual bool ShouldForwardGestureEvent(
const GestureEventWithLatencyInfo& gesture_event) const = 0;
};
} // namespace content
#endif // CONTENT_BROWSER_RENDERER_HOST_INPUT_INPUT_ROUTER_H_
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