fade_out styling for completion labels without highlights (#45936)
LSP's `CompletionItemKind` is defined by the protocol and may not have a corresponding highlight name in a language's `highlights.scm`. For example, Julia's grammar defines `@function.call` but not `@function`, so completions with `Method` kind cannot resolve a highlight. Since the mapping from `CompletionItemKind` to highlight names is an internal implementation detail that is not guaranteed to be stable, the fallback behavior should provide consistent styling regardless of grammar definitions. Bundled language extensions (e.g., Rust, TypeScript) apply `fade_out` or muted styling to the description portion of completion labels, so the fallback path and extension-provided labels should match this behavior. Previously, the description portion could fail to receive the expected `fade_out` styling in several independent cases: 1. When `runs` was empty (grammar lacks the highlight name), the `flat_map` loop never executed 2. When theme lacked a style for the `highlight_id`, early return skipped the `fade_out` logic 3. When extensions used `Literal` spans with `highlight_name: None`, `HighlightId::default()` was still added to `runs`, preventing `fade_out` from being applied The fix ensures description portions consistently receive `fade_out` styling regardless of whether the label portion can be highlighted, both for fallback completions and extension-provided labels. Closes #ISSUE Release Notes: - N/A *or* Added/Fixed/Improved ... --------- Co-authored-by: MrSubidubi <finn@zed.dev>
Zed
Welcome to Zed, a high-performance, multiplayer code editor from the creators of Atom and Tree-sitter.
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