Character Count, Nike Ad

util/Canvas.js

@@ -95,4 +95,32 @@ module.exports = class CanvasUtil {
 		}
 		return shorten ? `${text}...` : text;
 	}
+
+	static wrapText(ctx, text, maxWidth) {
+		if (ctx.measureText(text).width < maxWidth) return [text];
+		const words = text.split(' ');
+		const lines = [];
+		let line = '';
+		while (words.length > 0) {
+			let split = false;
+			while (ctx.measureText(words[0]).width >= maxWidth) {
+				const temp = words[0];
+				words[0] = temp.slice(0, -1);
+				if (split) {
+					words[1] = `${temp.slice(-1)}${words[1]}`;
+				} else {
+					split = true;
+					words.splice(1, 0, temp.slice(-1));
+				}
+			}
+			if (ctx.measureText(`${line}${words[0]}`).width < maxWidth) {
+				line += `${words.shift()} `;
+			} else {
+				lines.push(line.trim());
+				line = '';
+			}
+			if (words.length === 0) lines.push(line.trim());
+		}
+		return lines;
+	}
 };