1 // Copyright 2010-2018, Google Inc. 2 // Copyright 2012~2013, Weng Xuetian <wengxt@gmail.com> 3 // All rights reserved. 4 // 5 // Redistribution and use in source and binary forms, with or without 6 // modification, are permitted provided that the following conditions are 7 // met: 8 // 9 // * Redistributions of source code must retain the above copyright 10 // notice, this list of conditions and the following disclaimer. 11 // * Redistributions in binary form must reproduce the above 12 // copyright notice, this list of conditions and the following disclaimer 13 // in the documentation and/or other materials provided with the 14 // distribution. 15 // * Neither the name of Google Inc. nor the names of its 16 // contributors may be used to endorse or promote products derived from 17 // this software without specific prior written permission. 18 // 19 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 22 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 23 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 31 #ifndef MOZC_UNIX_FCITX_KEY_EVENT_HANDLER_H_ 32 #define MOZC_UNIX_FCITX_KEY_EVENT_HANDLER_H_ 33 34 #include <set> 35 #include <memory> 36 37 #include "base/port.h" 38 #include "protocol/config.pb.h" 39 #include "protocol/commands.pb.h" 40 #include "unix/fcitx/fcitx_key_translator.h" 41 42 namespace mozc { 43 namespace fcitx { 44 45 class KeyEventHandler { 46 public: 47 KeyEventHandler(); 48 49 // Converts a key event came from fcitx to commands::KeyEvent. This is a 50 // stateful method. It stores modifier keys states since ibus doesn't send 51 // an enough information about the modifier keys. 52 bool GetKeyEvent(FcitxKeySym keyval, uint32 keycode, uint32 modifiers, 53 config::Config::PreeditMethod preedit_method, 54 bool layout_is_jp, bool is_key_up, commands::KeyEvent *key); 55 56 // Clears states. 57 void Clear(); 58 59 private: 60 61 // Manages modifier keys. Returns false if it should not be sent to server. 62 bool ProcessModifiers(bool is_key_up, uint32 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<uint32> 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 fcitx 77 } // namespace mozc 78 79 #endif // MOZC_UNIX_FCITX_KEY_EVENT_HANDLER_H_ 80