pango.Layout.set_wrap support

[int-ua]

Is your feature request related to a problem? Please describe.
I'm creating 32x32px images with arbitrary text lengths, but the default pango layout is WRAP_WORD and it's not placing so much text in a significant number of cases where there is a short word at the beginning followed by a long word.

Describe the solution you'd like
The ability to change the wrap mode to pango.WRAP_CHAR:
https://developer.gnome.org/pygtk/stable/class-pangolayout.html#method-pangolayout--set-wrap

Additional context
libvips/pyvips#204

[int-ua]

I was able to workaround it to a degree by using zero-width space:

ZWSP = '\u200b'


def add_textbreaks(text, start=6):
    result = text[:start]
    for character in text[start:]:
        result += character + ZWSP
    return result

But (presumably) Pango adds hyphens and results are not satisfying:

Before	After

If it's like this with WRAP_CHAR it will not help me and we can close this issue.

[jcupitt]

This is a good idea. Let's leave this open as an enhancement.

[jcupitt]

Updated Pango API link: https://docs.gtk.org/Pango/method.Layout.set_wrap.html

[jcupitt]

I made a PR, let's continue discussion there.

#3130