Visual Studio Code - In editor.tokenColorCustomizations, how can I apply a rule only to files with a given extension?

ultrapoci
February 13, 2024
232 views
0 votes
2 Answers

I’m using Visual Studio Code with the Gruvbox theme. I have the following configuration in my settings.json:

"editor.tokenColorCustomizations": {
        "[Gruvbox Dark Medium]": {
            "textMateRules": [
                {
                    "scope": "source.c, entity.name.function.preprocessor",
                    "settings": {
                        "foreground": "#eb9b82"
                    }
                }
            ]
        }
    },

This colors C macros differently than the default. This works as expected, except that if I open a Rust file, Rust macros are also colored differently, despite the source.c in the scope field. How can I have this settings apply only to C files? Rust macros have the exclamation mark at the end which differentiate them from regular function, I don’t a different color for them.

EDIT:
Here is what the VSCode token inspector shows without the above settings for the println! macro:

Here is what the VSCode token inspector shows with the above settings enabled:

Tags: visual-studio-code

Answers

- starball
- February 13, 2024 at 11:07 am
- 0 votes
0
As Mark noticed, you have a comma between your two things. You wanted a descendent selector, but you turned it into grouping. See https://macromates.com/manual/en/scope_selectors. Remove the comma.

You could just use semantic highlighting customization instead?
```
"editor.semanticTokenColorCustomizations": {
    "[Your Theme Name Here]": { // TODO put your theme name here, or remove this wrapper to apply regardless of current theme
        "rules": {
            "macro.defaultLibrary:rust": {
                "foreground": "#FF0000", // TODO
                // "fontStyle": "bold",
            },
        },
    },
},
```
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- Mark
- February 13, 2024 at 8:11 pm
- 0 votes
0
You were close with your original attempt. Try this instead:
```
"editor.tokenColorCustomizations": {
        "[Gruvbox Dark Medium]": {
            "textMateRules": [
                {
                    // remove the comma
                    "scope": "source.c entity.name.function.preprocessor",
                    "settings": {
                        "foreground": "#eb9b82"
                    }
                }
            ]
        }
    },
```
The comma between scopes makes them alternatives so the rule is being applied to source.c and to entity.name.function.preprocessor separately.

But you want to modify (i.e., limit) the scopes – in that case you do not use a comma to separate the scopes but just a space.

[I can’t actually duplicate your language/macro environment so I can’t test this as I usually do.]
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