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Web Browser

Participant ,
Jan 30, 2024 Jan 30, 2024

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Hi.  Is there a code to add to a PDF form to prevent it from opening in a web browser?  I have a form with password protections that are bypassed when the form is opened in a web browser due to the user not having a pdf reader installed.

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PDF , PDF forms

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Community Expert , Jan 30, 2024 Jan 30, 2024

You can try it with this code, but be aware it's not fool-proof. It could very well be that some PDF viewers are so bad they won't show the field at all, causing the underlying contents to be revealed...

 

if (app.viewerType=="Reader" || app.viewerType=="Exchange" || app.viewerType=="Exchange-Pro") {
	this.getField("CoverField").display = display.hidden;
}

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Participant ,
Jan 30, 2024 Jan 30, 2024

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I got an idea from another post, but I don't know how to make it work.  I created a read-only text field (visible but doesn't print) and expanded it over the entire page.  The field states "You must have a PDF reader installed or print it to use this form".  I need to know where to place a code similar to the 1 below to make the text field visible if the form is opened in a web browser and hidden if opened in a pdf reader.  

if (app.viewerVersion < 9) {
this.getField("theWarningField").display = display.visible;
    }
else if ( app.viewerVersion >= 9 ) {
this.getField("theWarningField").display = display.hidden;
}

 

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Community Expert ,
Jan 30, 2024 Jan 30, 2024

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You can try it with this code, but be aware it's not fool-proof. It could very well be that some PDF viewers are so bad they won't show the field at all, causing the underlying contents to be revealed...

 

if (app.viewerType=="Reader" || app.viewerType=="Exchange" || app.viewerType=="Exchange-Pro") {
	this.getField("CoverField").display = display.hidden;
}

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Participant ,
Jan 30, 2024 Jan 30, 2024

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Thanks. This seems to work.  I can't fully test it because a have a reader on my computer.  However, I did a preview in a browser window and saw the field.  

 

I ended up placing a dcument script: 

if (app.viewerType=="Reader" || app.viewerType=="Exchange" || app.viewerType=="Exchange-Pro") {
	this.getField("CoverField").display = display.hidden;
}

I also added the following script under document actions > Document Will Close so that the field reapears for the next user:

if (app.viewerType=="Reader" || app.viewerType=="Exchange" || app.viewerType=="Exchange-Pro") {
	this.getField("CoverField").display = display.noPrint;
}

 

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Participant ,
Jan 30, 2024 Jan 30, 2024

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Well, it seems I have a problem with this.  If I go to close it, then, hit cancel, the CoverField field is visible and doesn't go away.

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Community Expert ,
Jan 30, 2024 Jan 30, 2024

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If a PDF viewer doesn't support JS, then you can't use  JS to do something.  The setup has to be failsafe, meaning it works when JS isn't supported.   So make the field visible to start, then use the JS to make it hidden (as shown by Try67). If the viewer is does not support JavaScript, or is an old Acrobat, the field stays visible.

 

Thom Parker - Software Developer at PDFScripting
Use the Acrobat JavaScript Reference early and often

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Community Expert ,
Jan 30, 2024 Jan 30, 2024

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Participant ,
Jan 30, 2024 Jan 30, 2024

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I need to try this method as I had problems with using the above method.  I don't have the programs listed.  Is there 1 that doesn't have to be purchased just to add a layer.

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