Text wrapping splits words containing non-ASCII characters

[MartinZikmund]

Describe the bug

Text wrapping does not properly work for accented characters like ěščřžýáíé.

To Reproduce

1. Open sample app for Xamarin.Forms
2. Select Text tab
3. Enter: ščěěščž čšřžščřž čšřžščř čšřžščř čšřžščř čšřžščř čšřžščř
4. Resize the window. Notice the line breaks anywhere within the words

Expected behavior

Words with accented characters should not be broken between lines.

Environment (please complete the following information):

• Platform: CSharpMath.SkiaSharp (in general, not just XF)
• Package Version or Commit: latest
• Device: Windows

Maintainer triage (2026-08-30)

This issue now tracks incorrect word breaking for non-ASCII words, including the Czech reproduction above and the Russian reproduction from #192. Font loading, missing glyphs, bold/italic faces, and non-seekable streams are separate concerns and are out of scope here.

Acceptance criteria

• Text wrapping does not split Czech or Russian words at arbitrary character boundaries.
• Break opportunities remain correct around spaces and punctuation.
• Regression tests cover representative Czech and Cyrillic input through the Typography-backed text parser/typesetter.

[Happypig375]

@prepare Probably a bug of Typography.TextBreak.

[Happypig375]

Confirmed a bug of Typography.TextBreak.

[prepare]

This Typography bug was fixed,

see => LayoutFarm/Typography@f350e22

[MartinZikmund]

@prepare Thanks a lot!

[Happypig375]

Still need to fix this for diacritics via LaTeX commands instead of Unicode, i.e. a\r aa should be one group.

[BenjaNapo]

That's what happen when I try to show chinese text (appear squares), is this relate to this issue?

[Happypig375]

You should provide your own font like in #142.

[Happypig375]

@BenjaNapo See #20.

[BenjaNapo]

@BenjaNapo See #20.

I wrote in the constructor of App.cs:
CSharpMath.Settings.GlobalTypefaces = new Typography.OpenFont.OpenFontReader().Read(File.Open("Cabin-Regular.ttf", FileMode.Open));

but it says that GlobalTypefaces is an onlyread attribute