48 lines
1.1 KiB
JavaScript
48 lines
1.1 KiB
JavaScript
/*
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* Copyright (C) 2026 Mateusz Gruszczynski @linuxiarz.pl
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* Source-Available Code / Dual-Licensed.
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*
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* Free for non-commercial and evaluation use under terms of BSL/GPLv3.
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* Commercial or production use requires a valid paid license.
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* See LICENSE file in repository root for details.
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*/
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export function createRenderQueue(renderNow, schedule = queueMicrotask) {
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if (typeof renderNow !== "function") throw new TypeError("renderNow must be a function");
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if (typeof schedule !== "function") throw new TypeError("schedule must be a function");
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let rendering = false;
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let pending = false;
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let scheduled = false;
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const schedulePendingRender = () => {
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if (scheduled) return;
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scheduled = true;
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schedule(() => {
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scheduled = false;
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if (!pending) return;
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pending = false;
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render();
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});
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};
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function render() {
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if (rendering) {
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pending = true;
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schedulePendingRender();
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return;
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}
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pending = false;
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rendering = true;
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try {
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renderNow();
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} finally {
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rendering = false;
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if (pending) schedulePendingRender();
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}
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}
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return render;
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}
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