== From Frontend to Fcitx event pipe line and Input Method Engine == Inside Fcitx, The Key event will be wrapped as a [https://codedocs.xyz/fcitx/fcitx5/classfcitx_1_1KeyEvent.html KeyEvent] object, and be processed by the Fcitx event pipeline. Before sending to the pipeline, if the current layout to be used is not same as the system layout, Fcitx will apply its own XKB translation and store the translated key object in the field rawKey. The field key() will be updated accordingly as a normalized rawKey form.
在 Fcitx 内部，Key 事件将被包装为 KeyEvent对象，并由 Fcitx 事件管道处理。在发送到管道之前，如果当前要使用的布局与系统布局不同，Fcitx 将应用自己的 XKB 翻译并将翻译后的密钥对象存储在字段 rawKey 中。字段 key() 将相应更新为规范化的 rawKey 形式。