How does InDesing know if a font is copy protected?

[RdMax]

Hello, We need to develop a solution that can mark fonts as copy protected as shown here.

We could not find any means by a font is flagged copy-protected in the font file's flags

How does indesing detect this value?

[Laubender]

Hi RdMax,

look into the ExtendScript DOM documentation with object Font.

https://www.indesignjs.de/extendscriptAPI/indesign-latest/#Font.html

You'll see several properties related to the restrictions a font can have:

allowEditableEmbedding
allowOutlines
allowPDFEmbedding
allowPrinting

If the value is false of any of that the font's usage is restricted.

Regards,
Uwe Laubender
( Adobe Community Professional )

[RdMax]

In CEP the best event that matches is EXPORT. It won't be usable for the "Pacakge" action.

Also, these can be read from the value https://docs.microsoft.com/en-us/typography/opentype/spec/os2#fstype here.

This flag cannot solve the "Copy Protected" bit in the image

[Test Screen Name]

Wild speculation: I wonder if this is for fonts that do not have font files available, specifically those activated by Adobe Fonts. 

[Laubender · Accepted solution]

Well, yes.

Fonts activated from Adobe Fonts would fall also into the category.

One could tell from property location if a particular style is an activated font or not.

In my German InDesign the following string is returned when I ask of location of an Adobe Font:
"Aktiviert von Adobe Fonts"

//ExtendScript with InDesign:
app.findKeyStrings("Aktiviert von Adobe Fonts");
// Returns array with one string
// "$ID/S4SubscribedTypeKitFont"

Also forgot another property in my post above that could be set to true with a given font style:

restrictedPrinting

Regards,
Uwe Laubender
( Adobe Community Professional )