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// Copyright 2014 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.
#include "remoting/protocol/input_filter.h"
#include "remoting/proto/event.pb.h"
namespace remoting {
// NormalizingInputFilterCros addresses the problems generated by key rewritings
// such as Down->PageDown, 1->F1, etc, when keys are pressed in combination with
// the OSKey (aka Search). Rewriting OSKey+Down, for example, causes us to
// receive the following:
//
// keydown OSKey
// keydown PageDown
// keyup PageDown
// keyup OSKey
//
// The host system will therefore behave as if OSKey+PageDown were pressed,
// rather than PageDown alone.
class NormalizingInputFilterCros : public protocol::InputFilter {
public:
explicit NormalizingInputFilterCros(protocol::InputStub* input_stub);
virtual ~NormalizingInputFilterCros();
// InputFilter overrides.
virtual void InjectKeyEvent(const protocol::KeyEvent& event) OVERRIDE;
virtual void InjectMouseEvent(const protocol::MouseEvent& event) OVERRIDE;
private:
void ProcessKeyDown(const protocol::KeyEvent& event);
void ProcessKeyUp(const protocol::KeyEvent& event);
void SwitchRewritingKeyToModifying();
// Holds the keydown event for the most recent OSKey to have been pressed,
// while it is Rewriting, or we are not yet sure whether it is Normal,
// Rewriting or Modifying. The event is sent on if we switch to Modifying, or
// discarded if the OSKey is released while in Rewriting mode.
protocol::KeyEvent deferred_keydown_event_;
// True while the |rewrite_keydown_event_| key is Rewriting, i.e. was followed
// by one or more Rewritten key events, and not by any Modified events.
bool deferred_key_is_rewriting_;
// Stores the code of the OSKey while it is pressed for use as a Modifier.
uint32 modifying_key_;
DISALLOW_COPY_AND_ASSIGN(NormalizingInputFilterCros);
};
} // namespace remoting
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