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#1358 user fontpath priorities ignored on X11
(Report forwarded from Debian. The original bug report,
with analysis and patch, can be seen at
<http://bugs.debian.org/156118>.)
This bug was originally reported against Debian's tk
8.3.3 package, but it is still present in 8.4.1.
Executive summary: when scanning X11 fonts, Tk chooses
the last best match, rather than the first best match
(in the case where more than one font qualifies as a
"best" match). This completely subverts the user's
chosen priorities, making the user's least preferred
font into the top choice. It is, of course, a simple
case of "<=" being used where "<" would be
appropriate. The simple patch (from Massimo Dal Zotto
<dz@cs.unitn.it>) is attached.
X11 font ordering patch
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OK, this appears to be correct, in that only updated fonts with
a strictly lower become "best". Is this something that should
go into 8.4.2 (patchlevel release) or 8.5 (minor release) since
it may well show different fonts (which is the desired
behavior ... but is it something "ok" for a patchlevel?).
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Also note that that debian bug says that the font man page
specifies that "Helvetica" should == "helvetica" (that font
family names are case-insensitive).
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Applied for 8.4.2.
RE: font comparisons, I see several uses of strcasecmp, but
perhaps the families should all be lower-cased when they
come in. If someone has a clear patch for this, please open
a separate report.