// ==UserScript==
// @name          iPhone Emoji Reader
// @namespace     http://photar.net/emoji
// @description   Makes iPhone Emoji caracters viewable in firefox.
// @exclude http://digg.com
// @exclude http://photar.net/emoji/emojis.html
// ==/UserScript==

var replacements, regex, key, textnodes, node, s;

replacements = [
'E001','E002','E003','E004','E005','E006','E007','E008','E009','E00A','E00B',
'E00C','E00D','E00E','E00F','E010','E011','E012','E013','E014','E015','E016',
'E017','E018','E019','E01A','E01B','E01C','E01D','E01E','E01F','E020','E021',
'E022','E023','E024','E025','E026','E027','E028','E029','E02A','E02B','E02C',
'E02D','E02E','E02F','E030','E031','E032','E033','E034','E035','E036','E037',
'E038','E039','E03A','E03B','E03C','E03D','E03E','E03F','E040','E041','E042',
'E043','E044','E045','E046','E047','E048','E049','E04A','E04B','E04C','E04D',
'E04E','E04F','E050','E051','E052','E053','E054','E055','E056','E057','E058',
'E059','E05A','E101','E102','E103','E104','E105','E106','E107','E108','E109',
'E10A','E10B','E10C','E10D','E10E','E10F','E110','E111','E112','E113','E114',
'E115','E116','E117','E118','E119','E11A','E11B','E11C','E11D','E11E','E11F',
'E120','E121','E122','E123','E124','E125','E126','E127','E128','E129','E12A',
'E12B','E12C','E12D','E12E','E12F','E130','E131','E132','E133','E134','E135',
'E136','E137','E138','E139','E13A','E13B','E13C','E13D','E13E','E13F','E140',
'E141','E142','E143','E144','E145','E146','E147','E148','E149','E14A','E14B',
'E14C','E14D','E14E','E14F','E150','E151','E152','E153','E154','E155','E156',
'E157','E158','E159','E15A','E201','E202','E203','E204','E205','E206','E207',
'E208','E209','E20A','E20B','E20C','E20D','E20E','E20F','E210','E211','E212',
'E213','E214','E215','E216','E217','E218','E219','E21A','E21B','E21C','E21D',
'E21E','E21F','E220','E221','E222','E223','E224','E225','E226','E227','E228',
'E229','E22A','E22B','E22C','E22D','E22E','E22F','E230','E231','E232','E233',
'E234','E235','E236','E237','E238','E239','E23A','E23B','E23C','E23D','E23E',
'E23F','E240','E241','E242','E243','E244','E245','E246','E247','E248','E249',
'E24A','E24B','E24C','E24D','E24E','E24F','E250','E251','E252','E253','E301',
'E302','E303','E304','E305','E306','E307','E308','E309','E30A','E30B','E30C',
'E30D','E30E','E30F','E310','E311','E312','E313','E314','E315','E316','E317',
'E318','E319','E31A','E31B','E31C','E31D','E31E','E31F','E320','E321','E322',
'E323','E324','E325','E326','E327','E328','E329','E32A','E32B','E32C','E32D',
'E32E','E32F','E330','E331','E332','E333','E334','E335','E336','E337','E338',
'E339','E33A','E33B','E33C','E33D','E33E','E33F','E340','E341','E342','E343',
'E344','E345','E346','E347','E348','E349','E34A','E34B','E34C','E34D','E401',
'E402','E403','E404','E405','E406','E407','E408','E409','E40A','E40B','E40C',
'E40D','E40E','E40F','E410','E411','E412','E413','E414','E415','E416','E417',
'E418','E419','E41A','E41B','E41C','E41D','E41E','E41F','E420','E421','E422',
'E423','E424','E425','E426','E427','E428','E429','E42A','E42B','E42C','E42D',
'E42E','E42F','E430','E431','E432','E433','E434','E435','E436','E437','E438',
'E439','E43A','E43B','E43C','E43D','E43E','E43F','E440','E441','E442','E443',
'E444','E445','E446','E447','E448','E449','E44A','E44B','E44C','E501','E502',
'E503','E504','E505','E506','E507','E508','E509','E50A','E50B','E50C','E50D',
'E50E','E50F','E510','E511','E512','E513','E514','E515','E516','E517','E518',
'E519','E51A','E51B','E51C','E51D','E51E','E51F','E520','E521','E522','E523',
'E524','E525','E526','E527','E528','E529','E52A','E52B','E52C','E52D','E52E',
'E52F','E530','E531','E532','E533','E534','E535','E536','E537'];

textnodes = document.evaluate(
    "//text()",
    document,
    null,
    XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE,
    null);

for (var i = 0; i < textnodes.snapshotLength; i++)
{
  node = textnodes.snapshotItem(i);
  s = node.data;
  node.data = "";

  for( var n = 0; n < s.length; n++ )
  {
    var charcode = s.charCodeAt(n);
    var char = s.charAt(n);
    if( charcode > 57344 && charcode < 59000)
    {
      var url = "";
      for( var j = 0; j < replacements.length; j++)
      {
        var target = replacements[j];
        var targetchar = eval('"\\u' + target + '"');
        
        if(targetchar == char)
        {
          url = 'http://photar.net/emoji/emoji-'+target+'.png';
        }
      }
      if(url == "")    
      {
        GM_log('could not match: ' + char + ": " + charcode);
        node.data = node.data + char;
      }
      else
      {
        var newimg = document.createElement('img');
        newimg.setAttribute('src',url);
        insertAfter(newimg,node);
        node = document.createTextNode("");
        insertAfter(node,newimg);
      }
    }
    else
    {
      node.data = node.data + char;
    }
    /*
    var target = replacements[n];
    var targetchar = eval('"\\u' + target + '"');
    node = textnodes.snapshotItem(i);
    var pieces = node.data.split(targetchar);
    node.data = pieces[0];
    if( pieces.length > 1 )
    {
      GM_log('pieces length: ' + pieces.length);
      var newimg = document.createElement('img');
      newimg.setAttribute('src','http://photar.net/emoji/emoji-'+target+'.png');
      insertAfter(newimg,node);
      node = newimg;
    }

    for(var j = 1; j < pieces.length; j++)
    {
      var newtxt = document.createTextNode(pieces[j]);
      insertAfter(newtxt,node);
      var newimg = document.createElement('img');
      newimg.setAttribute('src','http://photar.net/emoji/emoji-'+target+'.png');
      insertAfter(newimg,newtxt);
      node = newimg;
    }
  */
  }
}

function insertAfter(new_node, existing_node) {
  if (existing_node.nextSibling) {
    existing_node.parentNode.insertBefore(new_node, existing_node.nextSibling);
  } else {
    existing_node.parentNode.appendChild(new_node);
  }
}