用快捷键切换单选状态组

[lotem]

Pull request

Issue tracker

Fixes will automatically close the related issue

Fixes #554

Feature

Describe feature of pull request

DONE:

状态选项里的单选状态组现在不支持通过快捷键切换，用不上这么好的文字提示，我准备把快捷键单选功能做好。

TODO:

另外，我打算把 Control+Shift+2 等快捷键
https://github.com/rime/rime-prelude/blob/master/key_bindings.yaml#L45

    - { when: always, accept: Control+Shift+2, toggle: ascii_mode }
    - { when: always, accept: Control+Shift+3, toggle: full_shape }
    - { when: always, accept: Control+Shift+4, toggle: simplification }
    - { when: always, accept: Control+Shift+5, toggle: extended_charset }

重新定义为

    - { when: always, accept: Control+Shift+2, toggle: '@0' }
    - { when: always, accept: Control+Shift+3, toggle: '@1' }
    - { when: always, accept: Control+Shift+4, toggle: '@2' }
    - { when: always, accept: Control+Shift+5, toggle: '@3' }

指改变方案中 switches/@0 等处定义的状态。这样的配置就通用了。兼容方案自定义的状态。

@x 如果不是开关而是单项选择状态组，最好不必改动词 toggle，让他轮换到下一个状态。免得还得专门改快捷键配置。

Unit test

• Done

Manual test

• Done

Code Review

1. Unit and manual test pass
2. GitHub Action CI pass
3. At least one contributor reviews and votes
4. Can be merged clean without conflicts
5. PR will be merged by rebase upstream base

Additional Info

[lotem]

Submitted as 5e8aca2

[tshu-w]

Should we change the https://github.com/rime/rime-prelude/blob/dd84abecc33f0b05469f1d744e32d2b60b3529e3/key_bindings.yaml#L45-L48 now? I can submit a PR?