253144 - Word spacing is not applied to zero width spaces

Status: RESOLVED INVALID

(Core :: Layout, defect)

Description

[Grey Nicholson (they/them)]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.7) Gecko/20040724 Firefox/0.9.1+
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.7) Gecko/20040724 Firefox/0.9.1+

CSS word-spacing is not applied to zero width spaces, despite them being treated
as a whitespace character (bug 37862).

See attachment 154392 [details] at bug 253143 comment 1.

Reproducible: Always
Steps to Reproduce:
1.
2.
3.

Comment 1

[Boris Zbarsky [:bzbarsky]]

Note bug 164700 

Comment 2

[Gervase Markham [:gerv]]

This is an automated message, with ID "auto-resolve01".

This bug has had no comments for a long time. Statistically, we have found that
bug reports that have not been confirmed by a second user after three months are
highly unlikely to be the source of a fix to the code.

While your input is very important to us, our resources are limited and so we
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Comment 3

[Daniel.S]

Works for me back to Fx 2.0

Comment 4

[Simon Montagu :smontagu]

I don't see that this is working in the testcases in bug 253143. Do you have a testcase that shows that it is working?

Comment 5

[Simon Montagu :smontagu]

That said, I believe this is actually invalid: the interaction between word-spacing and zero-width spaces isn't defined in CSS2, but CSS3 says (http://www.w3.org/TR/css3-text/#word-spacing):

|If there are no word-separator characters, or if the word-separating character |has a zero advance width (such as the zero width space U+200B) then the user |agent must not create an additional spacing between words.

Comment 6

[Daniel.S]

I'm sorry, I had both bugs open and they got me confused.

Actually I was about to close bug 253143, because according to CSS 2.1, it is right to add letter-spacing to U+200B.

CSS 2.1 §16.4 (http://www.w3.org/TR/CSS21/text.html#propdef-letter-spacing):
> <length>
> This value indicates inter-character space *in addition* to the default 
> space between characters.

Since were at at anyway, what do you think?

(In reply to comment #5)
> That said, I believe this is actually invalid: the interaction between
> word-spacing and zero-width spaces isn't defined in CSS2, but CSS3 says
> (http://www.w3.org/TR/css3-text/#word-spacing):

That would've been my next step, sorry for getting confused. I'll take care.

Comment 7

[Simon Montagu :smontagu]

(In reply to comment #6)
 
> Actually I was about to close bug 253143, because according to CSS 2.1, it is
> right to add letter-spacing to U+200B.
> 
> CSS 2.1 §16.4 (http://www.w3.org/TR/CSS21/text.html#propdef-letter-spacing):
> > <length>
> > This value indicates inter-character space *in addition* to the default 
> > space between characters.
> 
> Since were at at anyway, what do you think?

No, I think that letter-spacing should not apply to invisible characters, and we should fix bug 253143. See the last few comments in bug 464148.

Comment 8

[Simon Montagu :smontagu]

Or rather bug 464168

Comment 9

[Daniel.S]

(In reply to comment #8)
> Or rather bug 464168

Right. I get your point, thanks. Ok, no further need for spamming.