Ubiquity command to decode / encode base64

/**
*
*  Base64 encode / decode
*  http://www.webtoolkit.info/
*
**/

var Base64 = {

    // private property
    _keyStr : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",

    // public method for encoding
    encode : function (input) {
        var output = "";
        var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
        var i = 0;
var breakAfter = 32;
        input = Base64._utf8_encode(input);
myy = 0;
        while (i < input.length) {

            chr1 = input.charCodeAt(i++);
            chr2 = input.charCodeAt(i++);
            chr3 = input.charCodeAt(i++);

            enc1 = chr1 >> 2;
            enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
            enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
            enc4 = chr3 & 63;

            if (isNaN(chr2)) {
                enc3 = enc4 = 64;
            } else if (isNaN(chr3)) {
                enc4 = 64;
            }

            output = output +
            this._keyStr.charAt(enc1) + this._keyStr.charAt(enc2) +
            this._keyStr.charAt(enc3) + this._keyStr.charAt(enc4);
myy = myy +4;
if(myy%breakAfter == 0)
output = output + "\n";
        }

        return output;
    },

    // public method for decoding
    decode : function (input) {
        var output = "";
        var chr1, chr2, chr3;
        var enc1, enc2, enc3, enc4;
        var i = 0;
var breakAfter=10;
        input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");

        while (i < input.length) {

            enc1 = this._keyStr.indexOf(input.charAt(i++));
            enc2 = this._keyStr.indexOf(input.charAt(i++));
            enc3 = this._keyStr.indexOf(input.charAt(i++));
            enc4 = this._keyStr.indexOf(input.charAt(i++));

            chr1 = (enc1 << 2) | (enc2 >> 4);
            chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
            chr3 = ((enc3 & 3) << 6) | enc4;

            output = output + String.fromCharCode(chr1);

            if (enc3 != 64) {
                output = output + String.fromCharCode(chr2);
            }
            if (enc4 != 64) {
                output = output + String.fromCharCode(chr3);
            }

        }

        output = Base64._utf8_decode(output);

        return output;

    },

    // private method for UTF-8 encoding
    _utf8_encode : function (string) {
        string = string.replace(/\r\n/g,"\n");
        var utftext = "";

        for (var n = 0; n < string.length; n++) {

            var c = string.charCodeAt(n);

            if (c < 128) {
                utftext += String.fromCharCode(c);
            }
            else if((c > 127) && (c < 2048)) {
                utftext += String.fromCharCode((c >> 6) | 192);
                utftext += String.fromCharCode((c & 63) | 128);
            }
            else {
                utftext += String.fromCharCode((c >> 12) | 224);
                utftext += String.fromCharCode(((c >> 6) & 63) | 128);
                utftext += String.fromCharCode((c & 63) | 128);
            }

        }

        return utftext;
    },

    // private method for UTF-8 decoding
    _utf8_decode : function (utftext) {
        var string = "";
        var i = 0;
        var c = c1 = c2 = 0;

        while ( i < utftext.length ) {

            c = utftext.charCodeAt(i);

            if (c < 128) {
                string += String.fromCharCode(c);
                i++;
            }
            else if((c > 191) && (c < 224)) {
                c2 = utftext.charCodeAt(i+1);
                string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
                i += 2;
            }
            else {
                c2 = utftext.charCodeAt(i+1);
                c3 = utftext.charCodeAt(i+2);
                string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
                i += 3;
            }

        }

        return string;
    }

}

CmdUtils.CreateCommand(
            {
                name:        "b64enc",
                takes:       {"text": noun_arb_text},
                homepage:    "http://taukon.de/ubiquity-base64.php",
                author:      {name: "Sebastian Barthenheier", email: "tauven@gmail.com"},
                license:     "MPL,GPL",
                description: "decode base64",
                help:        "Select text to decode",
                execute: function(directObject) 
                {
                   searchText = jQuery.trim(directObject.html);
                    if(searchText.length <= 0) 
                    {
                      pblock.innerHTML = "Select text to decode";
                      return;
                    }                    
                    var decodedText = Base64.encode(searchText);
					CmdUtils.setSelection(decodedText);

                },                    
                preview: function(pblock, directObject) 
                {                    
                    searchText = jQuery.trim(directObject.text);
                    if(searchText.length <= 0) 
                    {
                      pblock.innerHTML = "Select text to decode";
                      return;
                    }                    
                    var previewTemplate = "encoded text:
 
${query}";
                    var decodedText     = Base64.encode(searchText);
                    var previewData     = {query: decodedText};
                    pblock.innerHTML    = CmdUtils.renderTemplate(previewTemplate, previewData);
                }
            });

CmdUtils.CreateCommand(
            {
                name:        "b64dec",
                takes:       {"text": noun_arb_text},
                homepage:    "http://taukon.de/ubiquity-base64.php",
                author:      {name: "Sebastian Barthenheier", email: "tauven@gmail.com"},
                license:     "MPL,GPL",
                description: "decode base64",
                help:        "Select text to decode",
                execute: function(directObject) 
                {
                    searchText = jQuery.trim(directObject.html);
                    if(searchText.length <= 0) 
                    {
                      pblock.innerHTML = "Select text to decode";
                      return;
                    }                    
                    var decodedText = Base64.decode(searchText);
					CmdUtils.setSelection(decodedText);

                },                    
                preview: function(pblock, directObject) 
                {                    
                    searchText = jQuery.trim(directObject.text);
                    if(searchText.length <= 0) 
                    {
                      pblock.innerHTML = "Select text to decode";
                      return;
                    }                    
                    var previewTemplate = "decoded text:
 
${query}";
                    var decodedText     = Base64.decode(searchText);
                    var previewData     = {query: decodedText};
                    pblock.innerHTML    = CmdUtils.renderTemplate(previewTemplate, previewData);
                }
            });