Function bindKeys

static/js/codemirror/keymap/vim.js:2534–2548

(keys, modifier)

        'style': 'fat-cursor'
      };
      function bindKeys(keys, modifier) {
        for (var i = 0; i < keys.length; i++) {
          var key = keys[i];
          if (!modifier && inArray(key, specialSymbols)) {
            // Wrap special symbols with '' because that's how CodeMirror binds
            // them.
            key = "'" + key + "'";
          }
          if (modifier) {
            keyMap[modifier + '-' + key] = keyMapper(keys[i], modifier);
          } else {
            keyMap[key] = keyMapper(keys[i]);
          }
        }
      }
      bindKeys(upperCaseAlphabet);
      bindKeys(upperCaseAlphabet, 'Shift');
      bindKeys(upperCaseAlphabet, 'Ctrl');