Tibetan line breaks about babel

[jbezos]

(Related to #250 but I can’t reopen this issue, so I moved messages here.)

Please, don’t ask new questions in closed issues, even if related. I can overlook them easily.

As to the line breaking, you can make spaces in shads and tshegs more flexible with, for example:

\directlua{
  Babel.tibetan.shad = {.5, .5, 0, false}
  Babel.tibetan.tsheg = {0, .001, 0, false}
}

See https://latex3.github.io/babel/news/whats-new-in-babel-3.81.html

I’ll modify the rules so that closing characters are dealt with. In the meanwhile, you can modify babel-tibetan.tex in the following way. Replace:

 \babelprehyphenation{tibetan}{^^^^0f0b[^ ^^^^0f0d^^^^0f0e]}%
    { {insert, penalty=10000}, {insert, space=\bbl@tempe, data=1}, {},
      {insert, space=\bbl@tempe, data=1}, {} }}

with

  \babelprehyphenation{tibetan}{^^^^0f0b[^ {)}^^^^0f0d^^^^0f0e]}%
    { {insert, penalty=10000}, {insert, space=\bbl@tempe, data=1}, {},
      {insert, space=\bbl@tempe, data=1}, {} }}

Another question: is there a simple way to prevent a single syllable from being alone on its line (beginning – in the case where the line incorporates other languages just before – or end)?

Very likely it's possible with luatex, but I have to investigate.

A last one: བོུ། seems to be rendered as བོ◌ུ།, how to correct that?

The rendering of characters depends, in principle, on the renderer or the font. Try with HarfBuzz.

[BenjaminGalliot]

Please, don’t ask new questions in closed issues, even if related. I can overlook them easily.

I hesitated, but you said "If you need further help, just continue this thread.", but after some days without any news, I started this new issue!

Thanks for the help, in LuaLaTeX, the line break, the management of the closing parenthesis and the rendering by Harfbuzz worked!

Do you have any idea of the unexpected behavior in XeLaTeX with foreignlanguage and selectlanguage?

Very likely it's possible with luatex, but I have to investigate.

Thank you!

[jbezos]

I hesitated, but you said "If you need further help, just continue this thread.", but after some days without any news, I started this new issue!

Quite true. But 8 months have passed! 🙂

Line breaking in xetex is hardcoded, but perhaps can be fine-tuned with the interchar mechanism (not sure).