Simple Pre Code With Font Awesome

 HTML
<link href='//netdna.bootstrapcdn.com/font-awesome/4.3.0/css/font-awesome.min.css' rel='stylesheet'/>

 CSS
 
/* CSS Pre Code by www.bloggerspice.com*/
pre {
    background: #444444;
    white-space: pre;
    word-wrap: break-word;
    overflow: auto;
}
pre.code {
    margin: 20px 25px;
    border-radius: 4px;
    border: 1px solid #292929;
    position: relative;
}
pre.code label {
    font-family: sans-serif;
    font-weight: bold;
    font-size: 80%;
    color: #3C99F9;
    position: absolute;
    left: 1px;
    top: 15px;
    text-align: center;
    width: 60px;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    pointer-events: none;
}
pre.code code {
    font-family: "Inconsolata","Monaco","Consolas","Andale Mono","Bitstream Vera Sans Mono","Courier New",Courier,monospace;
    display: block;
    margin: 0 0 0 60px;
    padding: 15px 16px 14px;
    border-left: 1px solid #555;
    overflow-x: auto;
    font-size: 13px;
    line-height: 19px;
    color: #ddd;
}
pre::after {
    content: "double click to selection";
    padding: 0;
    width: auto;
    height: auto;
    position: absolute;
    right: 18px;
    top: 14px;
    font-size: 12px;
    color: #ddd;
    line-height: 20px;
    overflow: hidden;
    -webkit-backface-visibility: hidden;
    transition: all 0.3s ease;
}
pre:hover::after {
    opacity: 0;
    visibility: visible;
}
pre.css code {
    color: #4899CE;
}
pre.html code {
    color: #EF662A;
}
pre.javascript code {
    color: #F4C22B;
}

 JS

<script type='text/javascript'>
$('i[rel="pre"]').replaceWith(function() {
    return $('<pre><code>' + $(this).html() + '</code></pre>');
});
var pres = document.querySelectorAll('pre,kbd,blockquote');
for (var i = 0; i < pres.length; i++) {
  pres[i].addEventListener("dblclick", function () {
    var selection = getSelection();
    var range = document.createRange();
    range.selectNodeContents(this);
    selection.removeAllRanges();
    selection.addRange(range);
  }, false);
}
</script>