splat-wrap-text.js

function wrapText(context, text, x, y, maxWidth, lineHeight) {
	var words = text.split(" ");
	var line = "";

	for (var i = 0; i < words.length; i++) {
		var testLine = line + words[i] + " ";
		var metrics = context.measureText(testLine);
		var testWidth = metrics.width;
		if (testWidth > maxWidth && i > 0) {
			context.fillText(line, x, y);
			line = words[i] + " ";
			y += lineHeight;
		} else {
			line = testLine;
		}
	}
	context.fillText(line, x, y);
}