1 // Copyright 2014 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. 4 5 #include "remoting/protocol/input_filter.h" 6 7 #include "remoting/proto/event.pb.h" 8 9 namespace remoting { 10 11 // NormalizingInputFilterCros addresses the problems generated by key rewritings 12 // such as Down->PageDown, 1->F1, etc, when keys are pressed in combination with 13 // the OSKey (aka Search). Rewriting OSKey+Down, for example, causes us to 14 // receive the following: 15 // 16 // keydown OSKey 17 // keydown PageDown 18 // keyup PageDown 19 // keyup OSKey 20 // 21 // The host system will therefore behave as if OSKey+PageDown were pressed, 22 // rather than PageDown alone. 23 class NormalizingInputFilterCros : public protocol::InputFilter { 24 public: 25 explicit NormalizingInputFilterCros(protocol::InputStub* input_stub); 26 virtual ~NormalizingInputFilterCros(); 27 28 // InputFilter overrides. 29 virtual void InjectKeyEvent(const protocol::KeyEvent& event) OVERRIDE; 30 virtual void InjectMouseEvent(const protocol::MouseEvent& event) OVERRIDE; 31 32 private: 33 void ProcessKeyDown(const protocol::KeyEvent& event); 34 void ProcessKeyUp(const protocol::KeyEvent& event); 35 36 void SwitchRewritingKeyToModifying(); 37 38 // Holds the keydown event for the most recent OSKey to have been pressed, 39 // while it is Rewriting, or we are not yet sure whether it is Normal, 40 // Rewriting or Modifying. The event is sent on if we switch to Modifying, or 41 // discarded if the OSKey is released while in Rewriting mode. 42 protocol::KeyEvent deferred_keydown_event_; 43 44 // True while the |rewrite_keydown_event_| key is Rewriting, i.e. was followed 45 // by one or more Rewritten key events, and not by any Modified events. 46 bool deferred_key_is_rewriting_; 47 48 // Stores the code of the OSKey while it is pressed for use as a Modifier. 49 uint32 modifying_key_; 50 51 DISALLOW_COPY_AND_ASSIGN(NormalizingInputFilterCros); 52 }; 53 54 } // namespace remoting 55