How to run a script after password security added to pdf

Question

I have a document which is placed on the company intranet (it needs to be password protected), if a copy is downloaded, the next time it is opened a watermark will show on each page.

The script is placed as an action on the page open event.

this.addWatermarkFromText("Uncontrolled document", 0, font.Helv, 24, color.red);

This script works however once the pdf is password protected it will no longer run the script.

NotAllowedError: Security settings prevent access to this property or method.

Doc.addWatermarkFromText:1:Page undefined:Open

Can anyone please advise how an embedded javascript can run after the document is password protected?

Thanks

Joel Geraci · Accepted Answer

You're confusing two different things.JavaScript can absolutely run on a document after it has been password protected. However, JavaScript can't modify the document in ways that the protection prohibits... just like if you had manually tried to add a watermark. In short, you won't be able to add a watermark after the document has been protected.What you can do instead is put a button field over the entire page that and then use a script to control it's visibility. The button icon would be a PDF of the watermark you want. Because the field will always appear on top of the page content, you'll want to make it somewhat transparent as well.

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