codegen.js

onopentag(name: string, attribs: {[s: string]: string}) {
	if (name === "rect") {

		if (viewBox !== undefined) {
			let x = t.numericLiteral(
				2 * Number.parseFloat(attribs.x || "0") / viewBox[2] - 1
			);
			let y = t.numericLiteral(
				1 - 2 * Number.parseFloat(attribs.y || "0") / viewBox[3]
			);
			let w = t.numericLiteral(
				2 * Number.parseFloat(attribs.width || "0") / viewBox[2]
			);
			let h = t.numericLiteral(
				2 * Number.parseFloat(attribs.height || "0") / viewBox[3]
			);
			let rectStatements;
			if (attribs.class) {
				const styleFunctionName = t.identifier(createLegalName(attribs.class));
				rectStatements = makeStyledRectDrawStatements({ styleFunctionName, x, y, w, h });
			} else {
				rectStatements = makeRectDrawStatements({ x, y, w, h });
			}
			paintStatements = paintStatements.concat(rectStatements);
		} else {
			console.warn("rect tag outside of svg parent tag with defined viewBox, skipping");
		}
	}
	
// ...