From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on inbox.vuxu.org X-Spam-Level: **** X-Spam-Status: No, score=4.7 required=5.0 tests=DKIM_INVALID,DKIM_SIGNED, FROM_SUSPICIOUS_NTLD,FROM_SUSPICIOUS_NTLD_FP,PDS_OTHER_BAD_TLD, T_TVD_MIME_EPI autolearn=no autolearn_force=no version=3.4.4 Received: (qmail 10166 invoked from network); 12 Oct 2021 19:42:39 -0000 Received: from bsd.lv (HELO mandoc.bsd.lv) (66.111.2.12) by inbox.vuxu.org with ESMTPUTF8; 12 Oct 2021 19:42:39 -0000 Received: from fantadrom.bsd.lv (localhost [127.0.0.1]) by mandoc.bsd.lv (OpenSMTPD) with ESMTP id 02d94044 for ; Tue, 12 Oct 2021 14:42:35 -0500 (EST) Received: from tarta.nabijaczleweli.xyz (139-28-40-42.artus.net.pl [139.28.40.42]) by mandoc.bsd.lv (OpenSMTPD) with ESMTP id 82e90f67 for ; Tue, 12 Oct 2021 14:42:34 -0500 (EST) Received: from tarta.nabijaczleweli.xyz (unknown [192.168.1.250]) by tarta.nabijaczleweli.xyz (Postfix) with ESMTPSA id EDBEDE92 for ; Tue, 12 Oct 2021 21:42:31 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=nabijaczleweli.xyz; s=202006; t=1634067752; bh=H/P/M0R9//krh7MDwFR5vIVJKAjNnmzEPswbXzbZ4BQ=; h=Date:From:To:Subject:From; b=KwvvXSvIo6e8Its8gA4+W7H7Y01dsxjuW2u7zqzh4Ogqf9Wbsgr2URiQz6XGM01kl g9tn8r7ztfPsRY/BYwTlnB6fGeqpdPiZgmHBGAbJPRgttVjJEN4sLzkYugNqzdNW3I HdgpOu6l0UQZH3UTSPe3/xC8RQDHnLWhfGMU0Gay+V7TapBMp2vXFJ2T8tXCdtM6ao jwyjMR7u5JZQwtoV/wBkgqaekfzHGIklh3GQAZ/7jE6w7E+KMyBMW4xb2bgK33ZpG5 6ql/EpRgtlT6wFSZzdabSOXOZ3in4wYf6Vyknn2m6bvvVegpsXPfJNaEaf5ByUgXfe pB6frkUU0YzHA== Date: Tue, 12 Oct 2021 21:42:30 +0200 From: =?utf-8?B?0L3QsNCx?= To: tech@mandoc.bsd.lv Subject: Bizarre .Nm-breaking-.Bd's-
 in -Thtml behaviour?
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Hi!

This one's weird, since I've written dozens of this sort of table before
and it's always worked, but this is somehow broken. A minimal example is
-- >8 --
=2ESh NAME
=2ENm a
=2E
=2ESh EXAMPLES
=2EBd -literal
=2ENm
b
=2EEd
-- >8 --

Which yields
-- >8 --
nabijaczleweli@tarta:~/uwu/mandoc$ ./mandoc -mdoc -Thtml -Ofragment ../kl.8


  

    UNTITLED
    LOCAL
    UNTITLED
  








NAME=



a






=
EXAMPLES





a
b







  

    
    
  



-- >8 --

Note how a and b are both (a) past Nm and (b) past the 
. This has
an additional funny side-effect of inlining the rest of the display
block. Macros still work, but text is laid normally by the browser,
rather than literally.

I don't know what triggers this in this case and not all others,
but an explicit .Nm argument fixes it (but that's, uh, suboptimal).

Happens on mandoc 1.14.5-1 off Debian and 2021-10-12T21:41:37+02:00 off
CVS.

Best,
=D0=BD=D0=B0=D0=B1

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Date: Sat, 16 Oct 2021 01:16:10 +0200
From: =?utf-8?B?0L3QsNCx?= 
To: tech@mandoc.bsd.lv
Subject: Bizarre .Nm-breaking-.Bd's-
 in -Thtml behaviour analysis + not
 a patch
Message-ID: <20211015231610.6zluzvlm2sovcurz@babtop.nabijaczleweli.xyz>
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Ha, got it!

On Tue, Oct 12, 2021 at 09:42:30PM +0200, =D0=BD=D0=B0=D0=B1 wrote:
> This one's weird, since I've written dozens of this sort of table before
> and it's always worked, but this is somehow broken. A minimal example is
> -- >8 --
> .Sh NAME
> .Nm a
> .
> .Sh EXAMPLES
> .Bd -literal
> .Nm
> b
> .Ed
> -- >8 --

If you apply this:
-- >8 --
Index: mdoc_html.c
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
RCS file: /cvs/mandoc/mdoc_html.c,v
retrieving revision 1.342
diff -u -r1.342 mdoc_html.c
--- mdoc_html.c	30 Mar 2021 19:26:20 -0000	1.342
+++ mdoc_html.c	15 Oct 2021 22:58:35 -0000
@@ -335,6 +335,8 @@
 {
=20
 	while (n !=3D NULL) {
+if(!strcmp(n->string ?: "", "a"))
+	fprintf(stderr, "a: %d\n", n->flags);
 		print_mdoc_node(meta, n, h);
 		n =3D n->next;
 	}
-- >8 --

Then the original test file gives this:
-- >8 --
nabijaczleweli@babtop:/tmp/mandoc$ stdbuf -o0  ./mandoc -Thtml -Ofragment /=
tmp/a.1 -mdoc


  

    UNTITLED
    LOCAL
    UNTITLED
  








NAME=



a: 3
a






=
EXAMPLES




a: 515


a
b







  

    
    
  



-- >8 --

But one with an explicit ".Nm a" instead,
which yields correct output, gives this:
-- >8 --
nabijaczleweli@babtop:/tmp/mandoc$ stdbuf -o0  ./mandoc -Thtml -Ofragment /=
tmp/a2.1 -mdoc


  

    UNTITLED
    LOCAL
    UNTITLED
  








NAME=



a: 3
a






=
EXAMPLES




a: 259
a
b









  

    
    
  



-- >8 --

A glance at the flags gives us
	259 =3D 0b0100000011 =3D NODE_NOFILL|NODE_VALID|NODE_ENDED
	515 =3D 0b1000000011 =3D NODE_NOSRC |NODE_VALID|NODE_ENDED

This explodes in print_mdoc_node(), which does
-- >8 --
static void print_mdoc_node(MDOC_ARGS) {
    if (n->type =3D=3D ROFFT_COMMENT || n->flags & NODE_NOPRT)
        return;

    if ((n->flags & NODE_NOFILL) =3D=3D 0)
        html_fillmode(h, ROFF_fi);
    else if (html_fillmode(h, ROFF_nf) =3D=3D ROFF_nf &&
        n->tok !=3D ROFF_fi && n->flags & NODE_LINE)
        print_endline(h);

    ...
-- >8 --

Explicit Nm takes the latter branch, implicit the former,
and setting fillmode to fi outputs the dreaded "
".

Needless to say, the fix is to set NODE_NOFILL on implicit Nms,
like it's done on explicit Nms:
-- >8 --
nabijaczleweli@babtop:/tmp/mandoc$ stdbuf -o0  ./mandoc -Thtml -Ofragment /=
tmp/a.1 -mdoc


  

    UNTITLED
    LOCAL
    UNTITLED
  








NAME=



a: 3
a






=
EXAMPLES




a: 771
a
b









  

    
    
  



-- >8 --

Where
	771 =3D 0b1100000011 =3D NODE_NOSRC|NODE_NOFILL|NODE_VALID|NODE_ENDED

Since ISTR you being somehow morally opposed to taking my patches,
my friendly advice is that I've found the code that sets this flag
to be at the tail-end of post_nm(), instead.

Best,
=D0=BD=D0=B0=D0=B1

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