3440bbc131
CompletionSource over the srccfg-vocab.json shape. Word fragment
matched via /[A-Za-z0-9_]{2,}/ at the caret; ranking is
prefix-match-first (shorter prefixes preferred) then substring;
cap 50 candidates, top 8 rendered. Each option carries the kind
('cvar'/'command') as cm6's autocomplete `type` so the popup
shows the appropriate icon.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
50 lines
1.5 KiB
JavaScript
50 lines
1.5 KiB
JavaScript
import { autocompletion } from "@codemirror/autocomplete";
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const WORD_RE = /[A-Za-z0-9_]{2,}/;
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function rank(query, label) {
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const q = query.toLowerCase();
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const l = label.toLowerCase();
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if (l === q) return 0;
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if (l.startsWith(q)) return 1 + l.length; // shorter prefix matches first
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const i = l.indexOf(q);
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if (i !== -1) return 10000 + i; // substring matches after all prefix matches
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return -1;
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}
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export function vocabCompletions(vocab) {
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// vocab: { cvars: [{name, desc?}, …], commands: [{name, desc?}, …] }
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const entries = [
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...vocab.cvars.map(e => ({ ...e, kind: "cvar" })),
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...vocab.commands.map(e => ({ ...e, kind: "command" })),
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];
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return (context) => {
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const word = context.matchBefore(WORD_RE);
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if (!word || (word.from === word.to && !context.explicit)) return null;
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const q = word.text;
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const scored = [];
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for (const e of entries) {
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const r = rank(q, e.name);
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if (r === -1) continue;
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scored.push([r, e]);
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if (scored.length > 200) break; // bound work; we cap to 50 below
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}
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scored.sort((a, b) => a[0] - b[0]);
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const options = scored.slice(0, 50).map(([, e]) => ({
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label: e.name,
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info: e.desc || e.kind,
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type: e.kind === "command" ? "function" : "variable",
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}));
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return { from: word.from, options, validFor: WORD_RE };
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};
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}
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export function autocompleteExtension(vocab) {
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return autocompletion({
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override: [vocabCompletions(vocab)],
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activateOnTyping: true,
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maxRenderedOptions: 8,
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});
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}
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