Refactoring of the client-side input pipeline and scaling dimension management.

remoting/protocol/key_event_tracker.h

Index: remoting/protocol/key_event_tracker.h
diff --git a/remoting/protocol/key_event_tracker.h b/remoting/protocol/key_event_tracker.h
new file mode 100644
index 0000000000000000000000000000000000000000..80ab6e2996b1f5de688c5a9a720666b660b8a2d3
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+++ b/remoting/protocol/key_event_tracker.h
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+// Copyright (c) 2011 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 REMOTING_PROTOCOL_KEY_EVENT_TRACKER_H_
+#define REMOTING_PROTOCOL_KEY_EVENT_TRACKER_H_
+
+#include <set>
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "remoting/protocol/input_stub.h"
+
+namespace remoting {
+namespace protocol {
+
+// Filtering InputStub which tracks key press and release events before passing
+// them on to |input_stub|, and can dispatch release events to |input_stub| for
+// all currently-pressed keys when necessary.
+class KeyEventTracker : public InputStub {
+ public:
+  KeyEventTracker(protocol::InputStub* input_stub);
+  virtual ~KeyEventTracker();
+
+  // Dispatch release events for all currently-pressed keys to the InputStub.
+  void ReleaseAllKeys();
+
+  // InputStub interface.
+  virtual void InjectKeyEvent(const KeyEvent& event) OVERRIDE;
+  virtual void InjectMouseEvent(const MouseEvent& event) OVERRIDE;
+
+ private:
+  protocol::InputStub* input_stub_;
+
+  std::set<int> pressed_keys_;
+
+  DISALLOW_COPY_AND_ASSIGN(KeyEventTracker);
+};
+
+}  // namespace protocol
+}  // namespace remoting
+
+#endif  // REMOTING_PROTOCOL_KEY_EVENT_TRACKER_H_