import { WorkerPoolContext, useWorkerPool } from "@pierre/diffs/react";import { WorkerPoolManager } from "@pierre/diffs/worker";import DiffsWorker from "@pierre/diffs/worker/worker.js?worker";import * as Schema from "effect/Schema";import { useCallback, useEffect, useMemo, useState, useSyncExternalStore, type ReactNode,} from "react";import { useTheme } from "../hooks/useTheme";import { resolveDiffThemeName, type DiffThemeName } from "../lib/diffRendering";import { PREFERRED_HIGHLIGHTER } from "../lib/syntaxHighlighting"; export class DiffWorkerError extends Schema.TaggedError<DiffWorkerError>()("DiffWorkerError", { operation: Schema.Literals(["create-worker", "get-render-options", "set-render-options"]), themeName: Schema.Literals(["pierre-light", "pierre-dark"]), cause: Schema.Defect(),}) { override get message(): string { return `Diff worker operation ${this.operation} failed for theme ${this.themeName}.`; }} const DIFF_WORKER_IDLE_TTL_MS = 30_000;let sharedWorkerPool: | { readonly pool: WorkerPoolManager; consumers: number; idleTimer: ReturnType<typeof setTimeout> | undefined; } | undefined; /** Create workers after a viewer commits, then reuse them across short panel closures. */function acquireDiffWorkerPool(themeName: DiffThemeName, poolSize: number) { const entry = (sharedWorkerPool ??= { pool: new WorkerPoolManager( { workerFactory: () => { try { return new DiffsWorker(); } catch (cause) { throw new DiffWorkerError({ operation: "create-worker", themeName, cause }); } }, poolSize, totalASTLRUCacheSize: 240, }, { theme: themeName, preferredHighlighter: PREFERRED_HIGHLIGHTER, tokenizeMaxLineLength: 1_000, useTokenTransformer: true, }, ), consumers: 0, idleTimer: undefined, }); clearTimeout(entry.idleTimer); entry.idleTimer = undefined; entry.consumers += 1; return entry;} function DiffWorkerThemeSync({ themeName }: { themeName: DiffThemeName }) { const workerPool = useWorkerPool(); useEffect(() => { if (!workerPool) { return; } let operation: DiffWorkerError["operation"] = "get-render-options"; void (async () => { try { const current = workerPool.getDiffRenderOptions(); if (current.theme === themeName) { return; } operation = "set-render-options"; await workerPool.setRenderOptions({ ...current, theme: themeName, }); } catch (cause) { console.error(new DiffWorkerError({ operation, themeName, cause })); } })(); }, [themeName, workerPool]); return null;} // Plain-text views do not queue a highlight task that could retry a blank first render.function DiffWorkerReady({ children }: { children?: ReactNode }) { const workerPool = useWorkerPool(); const [readyPool, setReadyPool] = useState<WorkerPoolManager>(); const ready = workerPool ? readyPool === workerPool || workerPool.isInitialized() || !workerPool.isWorkingPool() : typeof window === "undefined"; useEffect(() => { if (ready || !workerPool) return; let mounted = true; const finish = () => { if (mounted) setReadyPool(workerPool); }; // Failed pools use Pierre's existing main-thread highlighter. void workerPool.initialize().then(finish, finish); return () => { mounted = false; }; }, [ready, workerPool]); return ready ? ( children ) : ( <div role="status" className="flex min-h-0 flex-1 items-center justify-center p-4 text-xs text-muted-foreground" > Loading code... </div> );} export function DiffWorkerPoolProvider({ children }: { children?: ReactNode }) { const { resolvedTheme } = useTheme(); const diffThemeName = resolveDiffThemeName(resolvedTheme); const workerPoolSize = useMemo(() => { const cores = typeof navigator === "undefined" ? 4 : Math.max(1, navigator.hardwareConcurrency || 4); return Math.max(2, Math.min(6, Math.floor(cores / 2))); }, []); const workerPool = useSyncExternalStore( useCallback( (onStoreChange) => { if (typeof window === "undefined") return () => {}; const entry = acquireDiffWorkerPool(diffThemeName, workerPoolSize); onStoreChange(); return () => { entry.consumers -= 1; if (entry.consumers !== 0) return; entry.idleTimer = setTimeout(() => { entry.idleTimer = undefined; entry.pool.terminate(); if (sharedWorkerPool === entry) sharedWorkerPool = undefined; }, DIFF_WORKER_IDLE_TTL_MS); }; }, [diffThemeName, workerPoolSize], ), () => sharedWorkerPool?.pool, () => undefined, ); return ( <WorkerPoolContext value={workerPool}> <DiffWorkerThemeSync themeName={diffThemeName} /> <DiffWorkerReady>{children}</DiffWorkerReady> </WorkerPoolContext> );}
import { WorkerPoolContext, useWorkerPool } from "@pierre/diffs/react";
import { WorkerPoolManager } from "@pierre/diffs/worker";
import DiffsWorker from "@pierre/diffs/worker/worker.js?worker";
import * as Schema from "effect/Schema";
import {
useCallback,
useEffect,
useMemo,
useState,
useSyncExternalStore,
type ReactNode,
} from "react";
import { useTheme } from "../hooks/useTheme";
import { resolveDiffThemeName, type DiffThemeName } from "../lib/diffRendering";
import { PREFERRED_HIGHLIGHTER } from "../lib/syntaxHighlighting";
export class DiffWorkerError extends Schema.TaggedError<DiffWorkerError>()("DiffWorkerError", {
operation: Schema.Literals(["create-worker", "get-render-options", "set-render-options"]),
themeName: Schema.Literals(["pierre-light", "pierre-dark"]),
cause: Schema.Defect(),
}) {
override get message(): string {
return `Diff worker operation ${this.operation} failed for theme ${this.themeName}.`;
}
}
const DIFF_WORKER_IDLE_TTL_MS = 30_000;
let sharedWorkerPool:
| {
readonly pool: WorkerPoolManager;
consumers: number;
idleTimer: ReturnType<typeof setTimeout> | undefined;
}
| undefined;
/** Create workers after a viewer commits, then reuse them across short panel closures. */
function acquireDiffWorkerPool(themeName: DiffThemeName, poolSize: number) {
const entry = (sharedWorkerPool ??= {
pool: new WorkerPoolManager(
{
workerFactory: () => {
try {
return new DiffsWorker();
} catch (cause) {
throw new DiffWorkerError({ operation: "create-worker", themeName, cause });
}
},
poolSize,
totalASTLRUCacheSize: 240,
},
{
theme: themeName,
preferredHighlighter: PREFERRED_HIGHLIGHTER,
tokenizeMaxLineLength: 1_000,
useTokenTransformer: true,
},
),
consumers: 0,
idleTimer: undefined,
});
clearTimeout(entry.idleTimer);
entry.idleTimer = undefined;
entry.consumers += 1;
return entry;
}
function DiffWorkerThemeSync({ themeName }: { themeName: DiffThemeName }) {
const workerPool = useWorkerPool();
useEffect(() => {
if (!workerPool) {
return;
}
let operation: DiffWorkerError["operation"] = "get-render-options";
void (async () => {
try {
const current = workerPool.getDiffRenderOptions();
if (current.theme === themeName) {
return;
}
operation = "set-render-options";
await workerPool.setRenderOptions({
...current,
theme: themeName,
});
} catch (cause) {
console.error(new DiffWorkerError({ operation, themeName, cause }));
}
})();
}, [themeName, workerPool]);
return null;
}
// Plain-text views do not queue a highlight task that could retry a blank first render.
function DiffWorkerReady({ children }: { children?: ReactNode }) {
const workerPool = useWorkerPool();
const [readyPool, setReadyPool] = useState<WorkerPoolManager>();
const ready = workerPool
? readyPool === workerPool || workerPool.isInitialized() || !workerPool.isWorkingPool()
: typeof window === "undefined";
useEffect(() => {
if (ready || !workerPool) return;
let mounted = true;
const finish = () => {
if (mounted) setReadyPool(workerPool);
};
// Failed pools use Pierre's existing main-thread highlighter.
void workerPool.initialize().then(finish, finish);
return () => {
mounted = false;
};
}, [ready, workerPool]);
return ready ? (
children
) : (
<div
role="status"
className="flex min-h-0 flex-1 items-center justify-center p-4 text-xs text-muted-foreground"
>
Loading code...
</div>
);
}
export function DiffWorkerPoolProvider({ children }: { children?: ReactNode }) {
const { resolvedTheme } = useTheme();
const diffThemeName = resolveDiffThemeName(resolvedTheme);
const workerPoolSize = useMemo(() => {
const cores =
typeof navigator === "undefined" ? 4 : Math.max(1, navigator.hardwareConcurrency || 4);
return Math.max(2, Math.min(6, Math.floor(cores / 2)));
}, []);
const workerPool = useSyncExternalStore(
useCallback(
(onStoreChange) => {
if (typeof window === "undefined") return () => {};
const entry = acquireDiffWorkerPool(diffThemeName, workerPoolSize);
onStoreChange();
return () => {
entry.consumers -= 1;
if (entry.consumers !== 0) return;
entry.idleTimer = setTimeout(() => {
entry.idleTimer = undefined;
entry.pool.terminate();
if (sharedWorkerPool === entry) sharedWorkerPool = undefined;
}, DIFF_WORKER_IDLE_TTL_MS);
};
},
[diffThemeName, workerPoolSize],
),
() => sharedWorkerPool?.pool,
() => undefined,
);
return (
<WorkerPoolContext value={workerPool}>
<DiffWorkerThemeSync themeName={diffThemeName} />
<DiffWorkerReady>{children}</DiffWorkerReady>
</WorkerPoolContext>
);
}