Add watermark to all files that are opened

[richard20201]

I have added a javascript file to the C:\Program Files (x86)\Adobe\Acrobat DC\Acrobat\Javascripts directory that I wanted to run each time a file is opened.  The script is as follows:

var addWatermarkToPdf = app.trustedFunction(function(){
app.beginPriv();
this.addWatermarkFromFile({
cDIPath: "/E/Printing Support/Images/Watermark.jpg",
nHorizAlign: app.constants.align.bottom,
nVertAlign: app.constants.align.bottom,
nHorizValue: 175.0, nVertValue: 25.0,
nRotation: 0,
nScale: .80
});

app.endPriv() ;
});

app.alert("here 1",3);
addWatermarkToPdf();

I can't seem to get the addWatermarkToPdf() function to run when called by this javascript file. The debugger is indicating that 'this' is not defined. Is this possible to do what I want? Any help would be appreciated.

[Bernd Alheit]

In the console execute

addWatermarkToPdf();

after you have open the PDF file.

[richard20201]

After I open the file the console has this error message: TypeError: this.addWatermarkToPdf is not a function
10:Folder-Level:App:Test.js. I am new to this so I am not sure how to run the function from the debugger. Thanks.

[Bernd Alheit]

Remove the last 2 lines from your script.

[Test Screen Name]

Don't try to run the function from the JavaScripts folder. This only used to define the function. You can't call it because at that moment no files are open yet. 

[try67]

In addition to what already said, I would recommend passing a reference to the Document object as a parameter, instead of using the "this" keyword in your trusted function.

[richard20201]

So is there anyway to run the javascrpt on a file automatically when it opens? Thanks.

[Test Screen Name · Accepted solution]

You can embed it INSIDE the file, to apply to THAT file.

Acrobat has nothing to allow JavaScript to "wait for a file to open then pounce".

[richard20201]

Thanks for the clarification.