Немного дзынь-буддизму

dzyn.js

var Tetrao = {

  BLOCKS : [
    'p', 'blockquote', 'div', 'address'
  ],

  LINE_WIDTH : 80,

  normalize : function (s) {
    s = s.replace(new RegExp(' ', 'gm'), ' ');
    s = s.replace(/\s+/gm, ' ');
    s = s.replace(new RegExp('<br></', 'gm'), '</');
    for (var i = 0, l = Tetrao.BLOCKS.length; i < l; i++) {
      s = s.replace(new RegExp('\\s+</' + Tetrao.BLOCKS[i], 'gmi'),
                    '</' + Tetrao.BLOCKS[i]);
      s = s.replace(new RegExp('<' + Tetrao.BLOCKS[i], 'gmi'),
                    '\n<' + Tetrao.BLOCKS[i]);
      s = s.replace(new RegExp('</' + Tetrao.BLOCKS[i] + '>', 'gmi'),
                    '</' + Tetrao.BLOCKS[i] + '>\n');
    }
    s = s.replace(/^\s+/, '').replace(/\s+$/, '');
    s = s.replace(/<(\w+)(\s+(class|style)=\".+?\")+\s*>/g, '<$1>');
    var result = '';
    var data = s.split(/\n/);
    for (var i = 0, l = data.length; i < l; i++) {
      var ss = data[i].replace(/^\s+/, '').replace(/\s+$/, '');
      var dd = ss.split(/\s+/);
      var rr = '';
      for (var ii = 0, ll = dd.length; ii < ll; ii++) {
        if (rr.length + dd[ii].length + 1 > Tetrao.LINE_WIDTH) {
          result = result + rr + '\n';
          rr = dd[ii];
        } else {
          if (rr === '') {
            rr = dd[ii];
          } else {
            rr = rr + ' ' + dd[ii];
          }
        }
      }
      result = result + rr + '\n';
    }
    return result;
  }

}