https://bugs.documentfoundation.org/show_bug.cgi?id=161378

--- Comment #14 from Eyal Rozenberg <[email protected]> ---
(In reply to Heiko Tietze from comment #13)

Bottom line: I am thinking of giving a talk on this matter, and font
substitution more generally, in this year's LOCon.

> The concept font family is not clear, maybe inspired by
> https://developer.mozilla.org/en-US/docs/Web/CSS/font-family.

It is perhaps not clear to many of us, but it is well-know to people who write
CSS; and it is mentioned and used in the ODF standard, see:

https://docs.oasis-open.org/office/OpenDocument/v1.3/os/part3-schema/OpenDocument-v1.3-os-part3-schema.html#__RefHeading__1418066_253892949

and: 

https://docs.oasis-open.org/office/OpenDocument/v1.3/os/part3-schema/OpenDocument-v1.3-os-part3-schema.html#__RefHeading__1418066_253892949

where the properties are borrowed/adopted from the XSL and SVG specifications
respectively.

For a bit of background and history on the terminology, have a look at:

https://en.wikipedia.org/wiki/Font
"In metal typesetting, a font is a particular size, weight and style of a
typeface[/font family]".

and then also:

https://en.wikipedia.org/wiki/Typeface
"A typeface (or font family) is a design of letters, numbers and other symbols,
to be used in printing or for electronic display."

Regardless - this bug is not about the terminology. 

> Users probably
> don't think about families but rather font names, ie. replace the font Aptos
> by Bierstadt.

Aptos is a "font family", a.k.a. a "typeface". And that is what users think
about. Yes, the vernacular use sometimes mixes up fonts and font families. 

> Of course we need to widen this in case the font Bierstadt is
> not available but it's unclear what users expect, where to make the
> configuration, and how to give proper feedback.

This bug is not about _users_' expectations, but document _authors_'
expectations (and specifications). As I mentioned in the design meeting, there
are different fallback  mechanisms; and this bug is about the one which the
document author controls (and can be different for different pieces of content
in the same document.)

> We don't had the expertise
> in the group, and apparently the overall interest is low.

If we want to:

* Edit HTML documents
* Edit styled XML documents
* Improve the robustness of users' employ of rare font families

then we should develop this interested...

Regardless, I will try to find the time to make some concrete suggestions and
maybe even creake some mockups.

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