− should render as –, not a hyphen, if no special minus glyph is available




Layout: Text
15 years ago
13 years ago


(Reporter: stevenj, Unassigned)


Mac OS X

Firefox Tracking Flags

(Not tracked)




(1 attachment)



15 years ago
Build Identifier: Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.6) Gecko/20040113

On systems like the MacOS, where there is no special glyph for the minus sign,
− renders as a hyphen (-).  An en dash (–) would be a much closer
fit, and I seem to recall it being the one recommended in e.g. Mac typography
guides.  A hyphen, on the other hand, is too short in most fonts.

This is something I first noticed in math pages on Wikipedia (e.g.
http://en.wikipedia.org/wiki/Quaternion) where people were using −.

Reproducible: Always
Steps to Reproduce:
create a web page with − for minus signs
Actual Results:  
got a hyphen glyph on MacOS

Expected Results:  
expected a longer dash, e.g. an –

Comment 1

15 years ago
This happens due the way the transliteration fallback works. Currently, glyphs
without fonts cannot be translitaterate to yet another Unicode point. They can
only be transliterated to ASCII -- which is certain to have a font.
Consequently, the − is transliterated to something close in the ASCII set.
And '-' is the closest.

It will be much work to redesign the transliteration system (with ramifications
into platform codes to further deal with missing glyphs even after the
transliteration). Suggesting wontfix, knowing that transliteration is a
desperate fallback, and people can install fonts, and this saves from further
bloat/complexity to Gecko in the belief that it should be responsible for

Comment 2

15 years ago
I agree with rbs. 
*** Bug 236160 has been marked as a duplicate of this bug. ***
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13 years ago
Last Resolved: 13 years ago
Resolution: --- → WONTFIX

Comment 5

13 years ago
Created attachment 197643 [details]
short .html file showing hyphen, minus, and ndash glyphs

Comment 6

13 years ago
This still occurs in Firefox 1.0.7, but I guess this is expected from the
"wontfix" tag.
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