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[csswg-drafts] [css-values-4] minor quible about informative text in definition of the ic unit

From: Florian Rivoal via GitHub <sysbot+gh@w3.org>
Date: Fri, 29 Jul 2016 01:24:14 +0000
To: public-css-archive@w3.org
Message-ID: <issues.opened-168231800-1469755453-sysbot+gh@w3.org>
frivoal has just created a new issue for 
https://github.com/w3c/csswg-drafts:

== [css-values-4] minor quible about informative text in definition of
 the ic unit ==
https://drafts.csswg.org/css-values/#ic

I've reviewed the definition of the `ic`, and it looks good to me. It 
closely mirrors the definition of the `ch` unit, which is as should 
be, since they're supposed to work very similarly.

That said, I think the terminology in second sentence / paragraph is 
slightly misleading.

> 
This measurement is an approximation (and in monospace fonts, an exact
 measure) of a single fullwidth glyph’s advance measure, thus allowing
 measurements based on an expected glyph count.

The term "monospace font" is typically used to refer to fonts in which
 the half-width  / latin characters are all the same size, and 
"proportional font" is used to describe those where that's not true. 
The vast majority of Japanese fonts have full width characters being 
all the same size (very often 1em), even when the latin part of the 
font is proportional.

Standard Microsoft fonts provide a good example of the variations out 
there. "MS Gothic" the classic default Japanese font on widows, is 
monospaced in the latin range and fullwidth glyphs are the same size. 
"MS PGothic" is proportional (that's what the P stands for) both in 
the latin range and in the fullwidth range. Yu Mincho is proportional 
in the latin range, but all fullwidth glyphs are the same size. See 
the screenshot below. Mixing proportional latin with equally sized 
fullwidth glyphs as in Yu Mincho is the more typical design, and such 
fonts are not usually discribed as monospaced.

<img width="188" alt="screenshot 2016-07-29 10 20 46" 
src="https://cloud.githubusercontent.com/assets/113268/17234692/331a9438-5576-11e6-9fb1-30d240efc813.png">


I suggest changing the sentence above to something like:

> 
This measurement often an exact measure (and in the few fonts that 
have variable-size fullwidth glyphs, an approximation) of any single 
fullwidth glyph’s advance measure, thus allowing measurements based on
 an expected glyph count.


Please view or discuss this issue at 
https://github.com/w3c/csswg-drafts/issues/357 using your GitHub 
account
Received on Friday, 29 July 2016 01:24:24 UTC

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