Saving Photoshop document with extendscript in background

@Stephen Marsh  I didn't know that a script could perform an action. It can be interesting.

@r-bin   indeed, it must be possible but it becomes complicated for what I would like to do.

Maybe I'm doing it wrong and there are other ways to do what I want.

When I save the changes of the active document, I would like a history step to be created (with an extendscript script).

I tried to run the history step creation script with the Scripts Events Manager but there are problems:

- if I run my extendscript on the "start saving" event, the history step is created even if the saving of the document is not completed (error or cancellation by the user). So this solution is not accurate.

- if I run my extendscript on the "saving document" event, the history step is created after the document is saved, and so the document appears as modified (and displays a save modal dialog if I close this document, which is rather painful).

Do you know another way to do what I would like?

This is possible by running an external script (or program) that simulates pressing Ctrl + S, provided that you have the background save mode enabled.

REM: In this case, the script must be in step-by-step mode for some time at the time the external program is launched, otherwise Photoshop will skip processing the keystrokes.

Have you tried something like:

var savedDisplayDialogs = app.displayDialogs;
app.displayDialogs = DialogModes.NO;
app.activeDocument.save();
app.displayDialogs = savedDisplayDialogs;

Offhand, I would say this may not be possible, as when you run a script, you can't do anything until the script completes. However, you might want to try recording the save with AM code rather than DOM. Maybe that might work.