Function operation

external/.scrollLibs.js:5531–5543

(cm, f)

  }
  // Wraps a function in an operation. Returns the wrapped function.
  function operation(cm, f) {
    return function () {
      if (cm.curOp) {
        return f.apply(cm, arguments)
      }
      startOperation(cm)
      try {
        return f.apply(cm, arguments)
      } finally {
        endOperation(cm)
      }
    }
  }
  // Used to add methods to editor and doc instances, wrapping them in
  // operations.
  function methodOp(f) {