Applying a script to a defined page range

So sorry I did not respond earlier.

The reason the script failed is that it assumed that all spreads had left and right-facing pages.

As you are having to swap page positions for margin considerations at some point in the workflow, and there can be some inconsistencies in how the page margins are arranged, my suggestion would be that you do have two master pages (A-Master and B-Master). A-Master would have the large margin on the left, and B-Master would have it on the right. You could set up some kind of dialog for easy entry, or just create a list similar to the one at the top of the following script. All you then have to do is change the order of the "A" and "B" designations as needed, and run the script to assign the appropriate master spreads.

If you delete a page, just run the script again to keep the left/right order as original.)

Note that the script works with the number of pages. Your pageList ("A" and "B" list) can be written to accommodate a maximum number of pages.

Just a suggestion.

//assign master spreads to pages as designated by pageList

var pageList =["A", "B", "B", "A", "B", "A", "B", "A"];

var sourceDoc = app.documents[0];

var pageCount = sourceDoc.pages.count();

for (var i = 0; i < pageCount; i++) {

var targetPage= sourceDoc.pages;

var listItem = pageList;

var masterName = (listItem + "-Master");

targetPage.appliedMaster = sourceDoc.masterSpreads.itemByName(masterName);

}

Maybe I don't see this the way you do, but could this not be just a matter of swapping pages?

Of course, if margins are not the same, you will have to add code to make adjustments.

var sourceDoc = app.documents[0];

var beginRange = 2;

var endRange = 4;

for (var i = beginRange; i <= endRange; i++) {

var targetSpread = sourceDoc.spreads;

targetSpread.pages[1].move(LocationOptions.BEFORE, targetSpread.pages[0]);

}

That seems unlikely to be possible. Binding direction is not a per-page setting, it's a document-wide setting. That's why it is in the Document Setup dialog, not in the per-page options. You can also see this reflected in your script – the setting is a documentPreferences thingy.

Double-checking – after all, you never know – shows that the PageBinding options indeed only can be applied to documents: InDesign ExtendScript API (12.0): PageBindingOptions