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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/browser/renderer_host/event_with_latency_info.h"
#include "content/common/input/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:
~InputRouter() override {}
// 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,
bool is_shortcut) = 0;
virtual void SendGestureEvent(
const GestureEventWithLatencyInfo& gesture_event) = 0;
virtual void SendTouchEvent(
const TouchEventWithLatencyInfo& touch_event) = 0;
// Returns the oldest queued or in-flight keyboard event sent to the router.
virtual const NativeWebKeyboardEvent* GetLastKeyboardEvent() const = 0;
// Allow the router to make more informed input handling decisions based on
// the current view.
enum ViewFlags {
VIEW_FLAGS_NONE = 0,
FIXED_PAGE_SCALE = 1 << 0,
MOBILE_VIEWPORT = 1 << 1
};
virtual void OnViewUpdated(int view_flags) = 0;
// Request a notification from the input router when all events have been
// fully dispatched and there are no longer any pending events.
// Note: This may trigger a synchronous notification if the router is empty.
virtual void RequestNotificationWhenFlushed() = 0;
// Whether there are any events pending dispatch to or ack from the renderer.
virtual bool HasPendingEvents() const = 0;
};
} // namespace content
#endif // CONTENT_BROWSER_RENDERER_HOST_INPUT_INPUT_ROUTER_H_
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