Google+ One Dimension

gplus.one_dimension.user.js

/*
    Google+ One Dimension => Decode octet encoding in G+.
    Copyright (C) 2012 Jingqin Lynn
    
    Includes jQuery
    Copyright 2011, John Resig
    Dual licensed under the MIT or GPL Version 2 licenses.
    http://jquery.org/license

    Includes Sizzle.js
    http://sizzlejs.com/
    Copyright 2011, The Dojo Foundation
    Released under the MIT, BSD, and GPL Licenses.
    
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.

*/

// ==UserScript==
// @name 		Google+ One Dimension
// @namespace		http://project.quietmusic.org/j/
// @description		Decode octet encoding in G+.
// @match		https://plus.google.com/*
// ==/UserScript==

(function (name, url, main) {
  'use strict';
  //Use the <base> element to detect Google+ main page.
  var base = document.querySelector('base');
  if (!base || !base.href.match(/^https:\/\/plus\.google\.com(\/u\/\d+)?\/?/)) return;
  
  var win = window;
  if (typeof(unsafeWindow) != 'undefined') {
    //Chrome V8 don't support unsafeWindow. Time for a hack.
    if (window == unsafeWindow) {
        var span = document.createElement('span');
        span.setAttribute('onclick', 'return window;');
        unsafeWindow =  span.onclick();
    }
    win = unsafeWindow;
  }
  if (win.DependencyLoader.dependencyState(name) == win.DependencyLoader.Dependency.LOADING) {
    main();
  } else {
    var dependencies = [
      { 'jQuery.gplus' : 'https://gist.github.com/raw/2645666/jquery.gplus.js' }
    ];
    var me = {}; me[name] = url;
    dependencies.push(me);
    win.DependencyLoader.requireOrdered(dependencies,
      null, function () {
        win.DependencyLoader.require(name, main);
      }
    );
  }
})(
  'org.quietmusic.project.gplus.oneDimension', 
  'https://gist.github.com/raw/1908942/gplus.one_dimension.user.js',
  function () {
    'use strict';
    var $ = window.jQuery;
    
    var UTF8 = {
        encode: function (str) {
            return unescape(encodeURIComponent(str));
        },
        decode: function (str) {
            return decodeURIComponent(escape(str));
        }
    };
    
    var zeroCharCode = '0'.charCodeAt(0);
    var aCharCodeMinus10 = 'a'.charCodeAt(0) - 10;
    var defaultDigits = '0123456789abcdefghijklmnopqrstuvwxyz';
    var maxCharCode = 255;
    var octetEncode = function (str, digits) {
      digits = digits || defaultDigits;
      var digitsMap = {};
      for (var i = 0; i < digits.length; i++) {
        digitsMap[(i < 10 ? zeroCharCode : aCharCodeMinus10) + i] = digits.charAt(i);
      }
      var maxLength = maxCharCode.toString(digits.length).length;
      str = UTF8.encode(str);
      var sb = [];
      for (var i = 0; i < str.length; i++) {
        var oct = str.charCodeAt(i).toString(digits.length);
        for (var j = 0; j < maxLength - oct.length; j++) {
          sb.push(digits.charAt(0));
        }
        for (var j = 0; j < oct.length; j++) {
          sb.push(digitsMap[oct.charCodeAt(j)]);
        }
      }
      return sb.join('');
    };

    var octetDecode = function (str, digits) {
      digits = digits || defaultDigits;
      var digitsMap = {};
      for (var i = 0; i < digits.length; i++) {
        digitsMap[digits.charCodeAt(i)] = i;
      }
      var maxLength = maxCharCode.toString(digits.length).length;
      var sb = [];
      for (var i = 0; i < str.length; i += maxLength) {
        var charCode = 0;
        for(var j = 0; j < maxLength; j++) {
          charCode = charCode * digits.length + digitsMap[str.charCodeAt(i + j)];
        }
        sb.push(charCode);
      }
      return UTF8.decode(String.fromCharCode.apply(String, sb));
    };
    defaultDigits = '—-─━┄┅┈┉';
    
    $.gplus.page().dynamicSelect('content', function (content) {
        content.xpath('.//text()', 'snapshot').each(function (_, text) {
          text.data = text.data.replace(/[—\-─━┄┅┈┉]{3,}/g, function (match) {
              try {
                  return '<!-- ' + octetDecode(match) + ' -->';
              } catch(ex) {
                  return match;
              }
          });
        });
    }, 'snapshot');
});