(function($) {
function shuffle(a) {
var i = a.length, j;
while (i) {
var j = Math.floor((i--) * Math.random());
var t = a[i];
a[i] = a[j];
a[j] = t;
}
}
function randomAlphaNum() {
var rnd = Math.floor(Math.random() * 62);
if (rnd >= 52) return String.fromCharCode(rnd - 4);
else if (rnd >= 26) return String.fromCharCode(rnd + 71);
else return String.fromCharCode(rnd + 65);
}
$.fn.rot13 = function() {
this.each(function() {
$(this).text($(this).text().replace(/[a-z0-9]/ig, function(chr) {
var cc = chr.charCodeAt(0);
if (cc >= 65 && cc <= 90) cc = 65 + ((cc - 52) % 26);
else if (cc >= 97 && cc <= 122) cc = 97 + ((cc - 84) % 26);
else if (cc >= 48 && cc <= 57) cc = 48 + ((cc - 43) % 10);
return String.fromCharCode(cc);
}));
});
return this;
};
$.fn.scrambledWriter = function() {
this.each(function() {
var $ele = $(this), str = $ele.text(), progress = 0, replace = /[^\s]/g,
random = randomAlphaNum, inc = 3;
$ele.text('');
var timer = setInterval(function() {
$ele.text(str.substring(0, progress) + str.substring(progress, str.length - 1).replace(replace, random));
progress += inc
if (progress >= str.length + inc) clearInterval(timer);
}, 100);
});
return this;
};
$.fn.typewriter = function() {
this.each(function() {
var $ele = $(this), str = $ele.text(), progress = 0;
$ele.text('');
var timer = setInterval(function() {
$ele.text(str.substring(0, progress++) + (progress & 1 ? '_' : ''));
if (progress >= str.length) clearInterval(timer);
}, 100);
});
return this;
};
$.fn.unscramble = function() {
this.each(function() {
var $ele = $(this), str = $ele.text(), replace = /[^\s]/,
state = [], choose = [], reveal = 25, random = randomAlphaNum;
for (var i = 0; i < str.length; i++) {
if (str[i].match(replace)) {
state.push(random());
choose.push(i);
} else {
state.push(str[i]);
}
}
shuffle(choose);
$ele.text(state.join(''));
var timer = setInterval(function() {
var i, r = reveal;
while (r-- && choose.length) {
i = choose.pop();
state[i] = str[i];
}
for (i = 0; i < choose.length; i++) state[choose[i]] = random();
$ele.text(state.join(''));
if (choose.length == 0) clearInterval(timer);
}, 100);
});
return this;
};
})(jQuery);