intercept paste event and convert urls in clipboard into links (for contenteditable elements)

anchor.js

document.addEventListener('paste', function (event) {
    var clip = event.clipboardData.getData('text/plain');
    var urlRegex =/(\b(https?|ftp|file):\/\/[-A-Z0-9+&@#\/%?=~_|!:,.;]*[-A-Z0-9+&@#\/%=~_|])/ig;
    var urlq = clip.match(urlRegex);
    if (urlq != null) {
        event.preventDefault();
        var anchored = clip.replace(urlRegex, function(url) {
            return '<a href="' + url +
                     '" style="cursor:pointer" onclick="window.open(this.href);return false">' +
                     url + '</a>';
        });
        
        document.execCommand('insertHTML', false, anchored);
    }
});