// ==UserScript==
    // @name           4chan - Translate to and from Ente Islean
    // @version        1.1
    // @author         Hanzou URUSHIHARA
    // @include        http://boards.4chan.org/a/res/*
    // @include        https://boards.4chan.org/a/res/*
    // @run-at         document-end
    // ==/UserScript==

    (function(){
      var d = document;
      var alpha_eng  = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
      var alpha_ente = 'AZYXEWVTISRQPNOMLKJHUGFDCBazyxewvtisrqpnomlkjhugfdcb';

      var tranChar = function(c_eng) {
        var x = alpha_eng.indexOf(c_eng);
        return x === -1 ? c_eng : alpha_ente[x];
      };

      var translate = function() {
        var nodes = d.evaluate('.//text()', post.nodes.comment, null, 7, null);
        for (var i = 0; i < nodes.snapshotLength; i++) {
          var node = nodes.snapshotItem(i);
          var eng  = node.data;
          var ente = '';
          for (var j = 0; j < eng.length; j++) {
            ente += tranChar(eng[j]);
          }
          node.data = ente;
        }
      };

      var post;
      var a = d.createElement('a');
      a.textContent = 'Translate';
      a.addEventListener('click', translate, false);

      d.dispatchEvent(new CustomEvent('AddMenuEntry', {
        detail: {
          el: a,
          open: function(p) {
            post = p;
            return true;
          },
          type: 'post'
        }
      }));


      // QR stuff

      var keyEvtListMaou = function(e) {
        if (!(e.altKey && e.keyCode === 88)) {
          return;
        }
        // Alt + X is pressed
        var eng  = this.value;
        var ente = '';
        for (var i = 0; i < eng.length; i++) {
          ente += tranChar(eng[i]);
        }
        this.value = ente;
      };

      var setupQRListener = function() {
        d.getElementById('qr').querySelector('textarea').addEventListener('keyup', keyEvtListMaou, false);
      };
      if (d.getElementById('qr')) {
        setupQRListener();
      } else {
        d.addEventListener('QRDialogCreation', setupQRListener, false);
      }
    })();