Re: Text scale mode and additional fonts

Re: Text scale mode and additional fonts

[Rahguzar]

Hi Eli,

> That's because the :size attribute is absolute: 28.  Instead, use a
> relative value, a float such as 1.5, then it should scale with the
> rest of the text.

I tried

(setq +bidi-arabic-font (font-spec :family "Mehr Nastaliq Web" :size 28.0))

and it doesn't change the behavior. With it if I use `describe-char` on an
Urdu character, I always see,

ftcrhb:-ITU -Mehr Nastaliq Web-regular-normal-normal-*-37-*-*-*-*-0-iso10646-1 (#x8F)

regardless of the `text-scale-mode-amount`. So a float value changes the
units but not the behavior w.r.t. `text-scale-mode`.

Thanks,
Rahguzar

Text scale mode and additional fonts

[Rahguzar]

Hi,
I sometimes write documents with a mix of Urdu and English. For Urdu I
have this in my config:

(setq +bidi-arabic-font (font-spec :family "Mehr Nastaliq Web"))

(set-fontset-font t 'arabic +bidi-arabic-font)

The font can be found here
https://mehrtype.com/product/mehr-nastaliq-web/

This works but Urdu text is too small. I can use `text-scale-increase`
but that also makes the English text bigger. So I tried this snippet
instead:

(setq +bidi-arabic-font (font-spec :family "Mehr Nastaliq Web" :size 28))

(set-fontset-font t 'arabic +bidi-arabic-font)

this makes the initial situation better but now the Urdu text is not
affected by the `text-scale-mode` commands.

To overcome this I have added a hook to `text-scale-mode-hook` to
manually adjust the font size. This improves the situation but feels
wrong since the `text-scale-mode` uses face remapping machinery which is
buffer local but the font sizes are global.

Is there a way to set a different size for my Urdu font that makes it
work seamlessly with `text-scale-mode`?

Thanks,
Rahguzar

Re: Text scale mode and additional fonts

[Eli Zaretskii]

> From: Rahguzar <rahguzar@zohomail.eu>
> Date: Sat, 30 Dec 2023 12:10:31 +0100
> 
> (setq +bidi-arabic-font (font-spec :family "Mehr Nastaliq Web" :size 28))
> 
> (set-fontset-font t 'arabic +bidi-arabic-font)
> 
> this makes the initial situation better but now the Urdu text is not
> affected by the `text-scale-mode` commands.

That's because the :size attribute is absolute: 28.  Instead, use a
relative value, a float such as 1.5, then it should scale with the
rest of the text.