q5-server.js

/**
 * @module q5-server
 * @description Run q5 with node.js using node-canvas and jsdom
 */

let depsLoaded = false;

try {
	global.SkiaCanvas ??= require('skia-canvas');
	global.JSDOM ??= require('jsdom').JSDOM;
	depsLoaded = true;
} catch (e) {
	require('./q5.js');
	module.exports = Q5;
}

if (depsLoaded) {
	global.window = new JSDOM('', { url: 'http://localhost' }).window;

	{
		let props = Object.getOwnPropertyNames(window).concat(Object.getOwnPropertyNames(Object.getPrototypeOf(window)));
		for (let prop of props) {
			if (!global[prop]) {
				Object.defineProperty(global, prop, Object.getOwnPropertyDescriptor(window, prop));
			}
		}
		global.Event = window.Event;
	}

	global.Image = window.Image = SkiaCanvas.Image;
	global.Window ??= SkiaCanvas.Window;

	require('./q5.js');

	Q5._createServerCanvas = function () {
		let skiaCanvas = new SkiaCanvas.Canvas(...arguments);
		let domCanvas = document.createElement('canvas');

		skiaCanvas.save = skiaCanvas.saveAsSync;

		return new Proxy(skiaCanvas, {
			get: function (target, prop) {
				let t = prop in target ? target : domCanvas;
				let p = t[prop];
				if (typeof p === 'function') return p.bind(t);
				return p;
			},
			set: function (target, prop, value) {
				if (prop in target) {
					target[prop] = value;
				} else {
					domCanvas[prop] = value;
				}
				return true;
			}
		});
	};

	module.exports = Q5;
}