Add a half-width style

[yb6b]

In CJK (Chinese, Japanese, Korean) language environments, characters are displayed as 1:1 aspect ratio. When mixing English and CJK fonts in VS Code, the English text must use a ​1:2 aspect ratio​ (width:height) to maintain proper cursor alignment.

There are little half-width and mordern programming fonts. Notable examples include Microsoft Cascadia Next, Iosevka, and Noto Sans Mono CJK. It would be great if Martian Mono could also adopt this style for better code readability in mixed-language environments.

[romashamin]

@yb6b that would be helpful if you could provide a screenshot demonstrating the issue.

[romashamin]

Martian Mono doesn’t include CJK characters in any case. I assume that’s where the issue lies.

[yb6b]

Here is a small experiment for illustration.

I clicked the mouse pointer on the first line of VSCode, and then I only pressed the down arrow key on the keyboard twice.

When the caret is moved to the English word "Hello" on the second line, there is an offset in the horizontal position of the caret.

But Source Han Sans HW (HW means half width) did not has the offset.

I found that the width-to-height ratio of Martian Mono Cn is 6:10. Is there a way to make it 5:10?

[romashamin]

@yb6b thank you! I think I get it—when using half-width Latin letters, each CJK character will still align with every two Latin letters.

This doesn’t seem like a straightforward task, so let me give it some thought.

[yb6b]

Yes, you're right. I'm sorry for not making myself clear at first. I'd be very happy if it could be done. Thank you so much!