The idea was it should be extensible by something else that could move faster than the Python standard library.
Варвара Кошечкина (редактор отдела оперативной информации)。下载安装 谷歌浏览器 开启极速安全的 上网之旅。对此有专业解读
We now maintain an index variable. Previously, the cursor was always at the right-end of the input, since you couldn't use arrow keys to move it left, and new input was always appended at the right-end. Now, we need to keep a separate index which is not necessarily at the end of the input, and when a user enters a character we splice it into the input in the correct location.，更多细节参见搜狗输入法2026
14:02, 27 февраля 2026Мир。搜狗输入法2026对此有专业解读
And yes the CSS style files are completely customizable by users!