Suggestion: Markdown settings for highlightjs theme

[jods4]

The markdown extension uses highlight.js for code highlighting, which comes with many themes inside its styles folder.

Yet, the default theme (tomorrow.css) is hardcoded here:
https://github.com/Microsoft/vscode/blob/master/extensions/markdown/src/extension.ts#L237

It is possible to override this by finding and copying the theme you like into your project and referencing the file with markdown.styles settings. This work but it's not easy/intuitive and it does not actually remove the tomorrow rules/stylesheet from the document (which can provide some unwanted defaults).

I suggest that you make the default theme easily changeable with a new settings, maybe markdown.highlightStyle: "tomorrow" and support all the hightlight.js built-in styles.

BTW I think tomorrow is a very colorful choice for a default settings, but that's just my taste.

[mjbvz]

Closing in favor of #22916 Let me know if you are interested in developing a markdown extension that can provide this functionality

[jods4]

Sorry, I don't have the time to look into VS Code extensions, although that looks like an exciting area.

If I had more time, I would surely try to add AsciiDocs support. There are some extensions in the market place but only one supports preview and it needs a globally installed Python AsciiDoctor, even though a perfectly fine AsciiDoctor.js exists!?

I've recently come to love AsciiDocs as a much better LML than Markdown.