Notepad++にUnicodeエスケープ/アンエスケープをするメニュー(「my」)を追加する(NppScripting\includesに配置して下さい)

unicode_escape.js

(function(){
  var menu = Editor.addMenu('my');

  addMenuItem(menu, {
    name: 'text to unicode escape',
    key: 'Ctrl+U',
    action: function(){ Editor.currentView.text = toUnicodeEscape(Editor.currentView.text) }
  });
  addMenuItem(menu, {
    name: 'unicode escape to text',
    key: 'Ctrl+Shift+U',
    action: function(){ Editor.currentView.text = fromUnicodeEscape(Editor.currentView.text) }
  });


  function toUnicodeEscape(s) {
    return s.replace(/[^\x00-\x7f]/g, function (c) {
      return '\\u' + ('0000' + c.charCodeAt(0).toString(16).toUpperCase()).slice(-4);
    });
  }
  function fromUnicodeEscape(s) {
    return s.replace(/\\u[0-9A-Z]{4}/ig, function(escape) {
      return String.fromCharCode(parseInt(escape.slice(2), 16));
    });
  }

  // based on Zen Coding.js
  function addMenuItem(menu, options) {
    var item = {
      text: options.name + (options.key ? '\t' + options.key : ''),
      cmd: options.action,
      ctrl: false,
      alt: false,
      shift: false
    };

    if (options.key) {
      options.key.split('+').forEach(function(key){
        key = key.toLowerCase();
        switch (key) {
          case 'shift':
          case 'alt':
          case 'ctrl':
            item[key] = true;
            break;
          default:
            item.key = key;
        }
      });

      Editor.addSystemHotKey(item);
    }
    menu.addItem(item);
  }
})();