Vinh Tran and MrSubidubi created
Per
https://github.com/zed-industries/zed/discussions/23371#discussioncomment-13533635,
the issue is not new and I don't know how to solve the problem more
holistically yet.
All of the native themes don't have spec for `@diff.plus` and
`@diff.minus` leaving addition and deletion not being highlighted. For
diff file, the most valuable highlighting comes from exactly what we're
missing. Hence, I think this is worth fixing.
Perhaps, the ideal fix would be standardizing and documenting captures
such as `@diff.plus` and `@diff.minus` on
https://zed.dev/docs/extensions/languages#syntax-highlighting for theme
writers to adopt. But the existing list of captures seems to be
language-agnostic so I'm not sure if that's the best way forward.
Per
https://github.com/the-mikedavis/tree-sitter-diff/pull/18#issuecomment-2569785346,
`tree-sitter-diff`'s author prefers using `@keyword` and `@string` so
that `tree-sitter highlight` can work out of the box. So it seems to be
an ok choice for Zed.
Another approach is just adding `@diff.plus` and `@diff.minus` to the
native themes. Let me know if I should pursue this instead.
Before
<img width="668" height="328" alt="Screenshot 2025-09-18 at 11 16 14 AM"
src="https://github.com/user-attachments/assets/d9a5b3b5-b9ef-4e74-883f-831630fb431e"
/>
After
<img width="1011" height="404" alt="Screenshot 2025-09-18 at 12 11
15 PM"
src="https://github.com/user-attachments/assets/9cf453c0-30df-4d17-99e9-f2297865f12a"
/>
<img width="915" height="448" alt="Screenshot 2025-09-18 at 12 12 14 PM"
src="https://github.com/user-attachments/assets/9e7438a6-9009-4136-b841-1f8e1356bc9b"
/>
Closes https://github.com/zed-industries/extensions/issues/490
Release Notes:
- Fixed highlighting for addition and deletion for diff language
---------
Co-authored-by: MrSubidubi <finn@zed.dev>crates/languages/src/diff/highlights.scm | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
@@ -3,12 +3,14 @@
[
(addition)
(new_file)
-] @diff.plus
+] @string
+;; TODO: This should eventually be `@diff.plus` with a fallback of `@string`
[
(deletion)
(old_file)
-] @diff.minus
+] @keyword
+;; TODO: This should eventually be `@diff.minus` with a fallback of `@keyword`
(commit) @constant
@@ -18,8 +20,6 @@
"diff" @function
(argument) @variable.parameter)
-(filename) @string.special.path
-
(mode) @number
([