如何使用Google应用程序脚本限制对文件的复制/下载/打印访问

function onOpen() {
  var ui = SpreadsheetApp.getUi();
  ui.createMenu('限制访问')
    .addItem('禁止复制', 'disableCopy')
    .addItem('禁止下载', 'disableDownload')
    .addItem('禁止打印', 'disablePrint')
    .addToUi();
}

function disableCopy() {
  var sheet = SpreadsheetApp.getActiveSpreadsheet();
  sheet.setActiveSheet(sheet.getSheets()[0]);
  sheet.getRange('A1').activate();
  var protection = sheet.getRange('A1').protect();
  protection.setDescription('禁止复制');
  protection.setWarningOnly(true);
}

function disableDownload() {
  var sheet = SpreadsheetApp.getActiveSpreadsheet();
  sheet.setActiveSheet(sheet.getSheets()[0]);
  sheet.getRange('A1').activate();
  var protection = sheet.getRange('A1').protect();
  protection.setDescription('禁止下载');
  protection.setWarningOnly(true);
}

function disablePrint() {
  var sheet = SpreadsheetApp.getActiveSpreadsheet();
  sheet.setActiveSheet(sheet.getSheets()[0]);
  sheet.getRange('A1').activate();
  var protection = sheet.getRange('A1').protect();
  protection.setDescription('禁止打印');
  protection.setWarningOnly(true);
}