Function visualLength

Picviewer CE+/dist.user.js:13478–13487

(str,size,family)

            rulerEle.style.whiteSpace = "nowrap";
        }
        function visualLength(str,size,family) {
            if (!rulerEle.style) return 230;
            rulerEle.style.fontSize = size || "inherit";
            rulerEle.style.fontFamily = family || "inherit";
            rulerEle.innerText = str;
            getBody(document).appendChild(rulerEle);
            let w = rulerEle.offsetWidth;
            getBody(document).removeChild(rulerEle);
            return w;
        }

        function getMStr(func) {
            var lines = func.toString();