1 // Copyright 2010-2018, Google Inc. 2 // All rights reserved. 3 // 4 // Redistribution and use in source and binary forms, with or without 5 // modification, are permitted provided that the following conditions are 6 // met: 7 // 8 // * Redistributions of source code must retain the above copyright 9 // notice, this list of conditions and the following disclaimer. 10 // * Redistributions in binary form must reproduce the above 11 // copyright notice, this list of conditions and the following disclaimer 12 // in the documentation and/or other materials provided with the 13 // distribution. 14 // * Neither the name of Google Inc. nor the names of its 15 // contributors may be used to endorse or promote products derived from 16 // this software without specific prior written permission. 17 // 18 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 30 #ifndef MOZC_UNIX_IBUS_KEY_EVENT_HANDLER_H_ 31 #define MOZC_UNIX_IBUS_KEY_EVENT_HANDLER_H_ 32 33 #include <memory> 34 #include <set> 35 36 #include "base/port.h" 37 #include "protocol/commands.pb.h" 38 #include "protocol/config.pb.h" 39 #include "unix/ibus/key_translator.h" 40 41 namespace mozc { 42 namespace ibus { 43 44 class KeyEventHandler { 45 public: 46 KeyEventHandler(); 47 48 // Converts a key event came from ibus to commands::KeyEvent. This is a 49 // stateful method. It stores modifier keys states since ibus doesn't send 50 // an enough information about the modifier keys. 51 bool GetKeyEvent(guint keyval, guint keycode, guint modifiers, 52 config::Config::PreeditMethod preedit_method, 53 bool layout_is_jp, commands::KeyEvent *key); 54 55 // Clears states. 56 void Clear(); 57 58 private: 59 friend class KeyEventHandlerTest; 60 61 // Manages modifier keys. Returns false if it should not be sent to server. 62 bool ProcessModifiers(bool is_key_up, guint keyval, 63 commands::KeyEvent *key_event); 64 65 std::unique_ptr<KeyTranslator> key_translator_; 66 // Non modifier key is pressed or not after all keys are released. 67 bool is_non_modifier_key_pressed_; 68 // Currently pressed modifier keys. It is set of keyval. 69 std::set<guint> currently_pressed_modifiers_; 70 // Pending modifier keys. 71 std::set<commands::KeyEvent::ModifierKey> modifiers_to_be_sent_; 72 73 DISALLOW_COPY_AND_ASSIGN(KeyEventHandler); 74 }; 75 76 } // namespace ibus 77 } // namespace mozc 78 79 #endif // MOZC_UNIX_IBUS_KEY_EVENT_HANDLER_H_ 80