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0xFEFF (ZWNBSP) is not correctly handled #431

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Rekkonnect opened this issue Jun 5, 2024 · 1 comment
Open

0xFEFF (ZWNBSP) is not correctly handled #431

Rekkonnect opened this issue Jun 5, 2024 · 1 comment

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@Rekkonnect
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This is a character commonly found in UTF-16-encoded sources. It is not specifically shown within a box when the option ShowBoxForControlCharacters is enabled.
@mgarstenauer
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It looks like AvaloniaEdit is calling Char.IsControl to determine whether the character is a control character.

https://github.com/AvaloniaUI/AvaloniaEdit/blob/master/src/AvaloniaEdit/Rendering/SingleCharacterElementGenerator.cs#L93C42-L93C59

Based on that definition 0xFEFF is not a control character.

VS Code also doesn't treat 0xFEFF as a control character, but it renders it as � (unrecognized character). VS Code highlights the character when Editor > Unicode Highlight: Invisible Characters is enabled.

Looks ShowBoxForControlCharacters is working as intended and a new feature is needed handle those kind of characters.

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@Rekkonnect @mgarstenauer