36 lines
2.2 KiB
Markdown
36 lines
2.2 KiB
Markdown
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---
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type: ADR
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id: "0140"
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title: "Extension-based raw text syntax highlighting"
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status: active
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date: 2026-06-17
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---
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## Context
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Tolaria already indexes UTF-8 non-Markdown vault files as `fileKind: "text"` and opens them in the raw CodeMirror editor. Discussion #872 asked for those files to receive syntax highlighting by file extension, especially `.sql`, `.json`, `.py`, and `.yaml`, matching the expectation set by highlighted fenced code blocks in Markdown notes.
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The raw editor previously installed the Markdown language extension for every raw file. That made Markdown notes work, but `.sql`, `.json`, `.py`, and `.yaml` files rendered as effectively plain text or Markdown-shaped text instead of using their own grammars.
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## Decision
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Tolaria maps raw editor file extensions to CodeMirror language packages at editor creation time:
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- Markdown files keep the existing frontmatter-aware Markdown path.
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- YAML, JSON, Python, SQL, JavaScript, and TypeScript-like files use the official CodeMirror language packages for those grammars.
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- Unknown text files stay plain instead of inheriting Markdown highlighting.
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- Markdown-only frontmatter decorations and warnings stay scoped to Markdown files.
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## Options considered
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- **Use official CodeMirror language packages** (chosen): keeps raw editing inside CodeMirror, provides maintained incremental parsers, and avoids a second rendering surface.
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- **Reuse Shiki from BlockNote code blocks**: visually closer to rich-editor code blocks, but Shiki is a static highlighter and would require a parallel CodeMirror decoration pipeline.
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- **Keep Markdown highlighting for every raw file**: no new dependencies, but fails the requested behavior and treats non-Markdown files as Markdown.
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## Consequences
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- New runtime dependencies: `@codemirror/lang-javascript`, `@codemirror/lang-json`, `@codemirror/lang-python`, and `@codemirror/lang-sql`.
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- `src/utils/rawEditorLanguage.ts` owns extension-to-language mapping.
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- `src/extensions/rawEditorLanguage.ts` owns the CodeMirror extension selection and keeps Markdown frontmatter highlighting scoped to Markdown files.
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- Additional languages should be added by extending the mapping and using official CodeMirror language packages where available.
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