Zero-width space character is not zero width for monospace fonts

Unity Engine
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1

I am using TextMesh Pro 3.0.0 UGUI component. “0x200B” character is not rendered in regular fonts as expected but it is rendered when the font is monospace. I don’t know if this is a bug or the expected behavior. But to me it makes more sense if this character is zero-width even in monospace (that is the case in HTML).

I locally fixed it by adding || charCode == 0x200B to TMPRO_UGUI_Private.cs line 2083.

For the context, I am using this character for allowing words to line-break at certain points.

Edit: The solution above makes the caret disappear when input field is empty.

2

Do you mean when using tag or with a particular font?

If a particular font, please provide a link to this font file.

3

@Stephan_B I am using the Roboto Mono font (Regular 400). Same thing also happens with tag.

See the example image. The first text is regular font and the second one is monospace font.

4

Is your expectation that when using the Zero Width Space that it would remain zero width in all cases?

5

@Stephan_B Yes, that is what I expected. All UI frameworks I checked render it as zero width, does not matter if the font is monospace or not.

Sorry for the late reply.

6

@Stephan_B any progress on this? Do you agree that it is a bug?

7

That is an issue which I should be able to address in the next release.