jquery_plantuml.js

$(document).ready(function(){
   plantuml_runonce();
});

<!--  taken from https://github.com/johan/js-deflate -->

function encode64(data) {
 r = "";
 for (i=0; i<data.length; i+=3) {
  if (i+2==data.length) {
   r +=append3bytes(data.charCodeAt(i), data.charCodeAt(i+1), 0);
  } else if (i+1==data.length) {
   r += append3bytes(data.charCodeAt(i), 0, 0);
  } else {
   r += append3bytes(data.charCodeAt(i), data.charCodeAt(i+1), data.charCodeAt(i+2));
  }
}
return r;
}

function append3bytes(b1, b2, b3) {
c1 = b1 >> 2;
c2 = ((b1 & 0x3) << 4) | (b2 >> 4);
c3 = ((b2 & 0xF) << 2) | (b3 >> 6);
c4 = b3 & 0x3F;
r = "";
r += encode6bit(c1 & 0x3F);
r += encode6bit(c2 & 0x3F);
r += encode6bit(c3 & 0x3F);
r += encode6bit(c4 & 0x3F);
return r;
}

function encode6bit(b) {
if (b < 10) {
 return String.fromCharCode(48 + b);
}
b -= 10;
if (b < 26) {
 return String.fromCharCode(65 + b);
}
b -= 26;
if (b < 26) {
 return String.fromCharCode(97 + b);
}
b -= 26;
if (b == 0) {
 return '-';
}
if (b == 1) {
 return '_';
}
return '?';
}

var deflater = window.SharedWorker && new SharedWorker('rawdeflate.js');
if (deflater) {
  deflater.port.addEventListener('message', done_deflating, false);
  deflater.port.start();
} else if (window.Worker) {
  deflater = new Worker('rawdeflate.js');
  deflater.onmessage = done_deflating;
}

function done_deflating(e) {
var done = 0;
$("img").each(function () {
  if (done==1) return;
  var u1 = $(this).attr("src");
  if (u1!=null) return;
  var u2 = $(this).attr("uml");
  if (u2=="") return;
  $(this).attr("src", "http://www.plantuml.com/plantuml/img/"+encode64(e.data));
  $(this).attr("uml", "");
  done = 1;
});
plantuml_runonce();
}

function plantuml_runonce() {
var done = 0;
$("img").each(function () {
  if (done==1) return;
  var u1 = $(this).attr("src");
  if (u1!=null) return;
  var u2 = $(this).attr("uml");
  if (u2=="") return;
  var s = unescape(encodeURIComponent(u2));
  if (deflater) {
    if (deflater.port && deflater.port.postMessage) {
      deflater.port.postMessage(s);
    } else {
      deflater.postMessage(s);
    }
  } else {
    setTimeout(function() {
      done_deflating({ data: deflate(s) });
    }, 100);
  }
  done = 1;
});
}