Function parseKeyString

static/js/codemirror/keymap/vim.js:2361–2399

(str)

    // Converts a key string sequence of the form a<C-w>bd<Left> into Vim's
    // keymap representation.
    function parseKeyString(str) {
      var idx = 0;
      var keys = [];
      while (idx < str.length) {
        if (str.charAt(idx) != '<') {
          keys.push(str.charAt(idx));
          idx++;
          continue;
        }
        // Vim key notation here means desktop Vim key-notation.
        // See :help key-notation in desktop Vim.
        var vimKeyNotationStart = ++idx;
        while (str.charAt(idx++) != '>') {}
        var vimKeyNotation = str.substring(vimKeyNotationStart, idx - 1);
        var mod='';
        var match = (/^C-(.+)$/).exec(vimKeyNotation);
        if (match) {
          mod='Ctrl-';
          vimKeyNotation=match[1];
        }
        var key;
        switch (vimKeyNotation) {
          case 'BS':
            key = 'Backspace';
            break;
          case 'CR':
            key = 'Enter';
            break;
          case 'Del':
            key = 'Delete';
            break;
          default:
            key = vimKeyNotation;
            break;
        }
        keys.push(mod + key);
      }
      return keys;
    }

    var exCommands = {
      map: function(cm, params) {