Controlling undo with doScript.

Undo.js

/**
 * Controlling Undo with doScript
 *
 * InDesign gives you the ability to undo almost every action, but this comes at a price: for almost every
 * action you make, InDesign writes to disk. For normal work you using the tools presented by the user
 * interface, this does not present any problem. For scripts, which can perform thousands of actions in the
 * time a human being can blink, the constant disk access can be a serious drag on performance.
 * The doScript method offers a way around this performance bottleneck by providing two parameters that
 * control the way that scripts are executed relative to InDesign’s Undo behavior. These parameters are
 * shown in the following examples:
 */

//Given a script "myJavaScript" and an array of parameters "myParameters"...
app.doScript(myJavaScript, ScriptLanguage.javascript, myParameters, UndoModes.fastEntireScript, "Script Action");

//UndoModes can be:
//UndoModes.autoUnto: Add no events to the Undo queue.
//UndoModes.entireScript: Put a single event in the Undo queue.
//UndoModes.fastEntireScript: Put a single event in the Undo queue.
//UndoModes.scriptRequest: Undo each script action as a separate event.
//The last parameter is the text that appears in the Undo menu item.