1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #ifndef REMOTING_HOST_REMOTE_INPUT_FILTER_H_
6 #define REMOTING_HOST_REMOTE_INPUT_FILTER_H_
10 #include "base/basictypes.h"
11 #include "base/compiler_specific.h"
12 #include "base/time/time.h"
13 #include "remoting/protocol/input_event_tracker.h"
14 #include "remoting/protocol/input_stub.h"
15 #include "third_party/skia/include/core/SkPoint.h"
19 // Filtering InputStub that filters remotely-injected input if it has been
20 // notified of local input recently.
21 class RemoteInputFilter : public protocol::InputStub {
23 // Creates a filter forwarding events to the specified InputEventTracker.
24 // The filter needs a tracker to release buttons & keys when blocking input.
25 explicit RemoteInputFilter(protocol::InputEventTracker* event_tracker);
26 virtual ~RemoteInputFilter();
28 // Informs the filter that local mouse activity has been detected. If the
29 // activity does not match events we injected then we assume that it is local,
30 // and block remote input for a short while.
31 void LocalMouseMoved(const SkIPoint& mouse_pos);
33 // Informs the filter that injecting input causes an echo.
34 void SetExpectLocalEcho(bool expect_local_echo);
36 // InputStub overrides.
37 virtual void InjectKeyEvent(const protocol::KeyEvent& event) OVERRIDE;
38 virtual void InjectMouseEvent(const protocol::MouseEvent& event) OVERRIDE;
41 bool ShouldIgnoreInput() const;
43 protocol::InputEventTracker* event_tracker_;
45 // Queue of recently-injected mouse positions used to distinguish echoes of
46 // injected events from movements from a local input device.
47 std::list<SkIPoint> injected_mouse_positions_;
49 // Time at which local input events were most recently observed.
50 base::TimeTicks latest_local_input_time_;
52 // If |true| than the filter assumes that injecting input causes an echo.
53 bool expect_local_echo_;
55 DISALLOW_COPY_AND_ASSIGN(RemoteInputFilter);
58 } // namespace remoting
60 #endif // REMOTING_HOST_REMOTE_INPUT_FILTER_H_