| // Copyright 2010-2015, Google Inc. |
| // All rights reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following disclaimer |
| // in the documentation and/or other materials provided with the |
| // distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #ifndef MOZC_WIN32_BASE_SURROGATE_PAIR_OBSERVER_H_ |
| #define MOZC_WIN32_BASE_SURROGATE_PAIR_OBSERVER_H_ |
| |
| #include <windows.h> |
| |
| #include "base/port.h" |
| |
| namespace mozc { |
| namespace win32 { |
| |
| class VirtualKey; |
| |
| class SurrogatePairObserver { |
| public: |
| // Return code which represents the expected action of the IME DLL. |
| enum ClientActionType { |
| // This key event is not a VK_PACKET-related event. |
| // The the caller must do the default action. |
| DO_DEFAULT_ACTION = 0, |
| // This key event is a VK_PACKET-related event. |
| // The caller replace the VirtualKey instance with new one which conatins |
| // returned ucs4 character code. |
| // Then the caller must proceed to do the default action. |
| DO_DEFAULT_ACTION_WITH_RETURNED_UCS4, |
| // This key event must be consumed silently. In other words, the caller |
| // must not send this event to the Mozc server. |
| CONSUME_KEY_BUT_NEVER_SEND_TO_SERVER, |
| CLIENT_ACTION_LAST = 0xffffffff, |
| }; |
| |
| struct ClientAction { |
| ClientAction(ClientActionType type, char32 ucs4) |
| : type(type), ucs4(ucs4) {} |
| const ClientActionType type; |
| const char32 ucs4; |
| }; |
| |
| SurrogatePairObserver(); |
| |
| ClientAction OnTestKeyEvent(const VirtualKey &virtual_key, bool is_keydown); |
| ClientAction OnKeyEvent(const VirtualKey &virtual_key, bool is_keydown); |
| |
| private: |
| enum ObservationState { |
| INITIAL_STATE = 0, |
| WAIT_FOR_SURROGATE_HIGH_UP, |
| WAIT_FOR_SURROGATE_LOW_DOWM, |
| WAIT_FOR_SURROGATE_LOW_UP, |
| OBSERVATION_STATE_LAST = 0xffffffff, |
| }; |
| |
| // Returns the expected action of the IME DLL against the given key event. |
| ClientAction OnKeyEvent(const VirtualKey &virtual_key, bool is_keydown, |
| bool is_testkey); |
| |
| ObservationState state_; |
| wchar_t surrogate_high_; |
| wchar_t surrogate_low_; |
| |
| DISALLOW_COPY_AND_ASSIGN(SurrogatePairObserver); |
| }; |
| |
| } // namespace win32 |
| } // namespace mozc |
| |
| #endif // MOZC_WIN32_BASE_SURROGATE_PAIR_OBSERVER_H_ |