Re: Links into HTML page would be great

[Ingo Schwarze <schwarze@usta.de>]

Hi Jan,

Jan Stary wrote on Mon, Mar 13, 2017 at 10:56:27AM +0100:

> Anyway, in my firefox,
> http://man.openbsd.org/OpenBSD-current/man5/ssh_config.5
> displays the synopsis as
> 
> SYNOPSIS
>   ~/.ssh
>   /config 	
> 
>   /etc/ssh
>   /ssh_config 	
> 
> 
> Only after I make the font smaller than 100% (with Crtrl + -) it becomes
> 
> SYNOPSIS
>   ~/.ssh/config 	
>   /etc/ssh/ssh_config
> 
> Why is that? Could it be besause of the hardwired width?

Yes.

> (Or is it a firefox bug to not recompute the relative widths (ex)?)

No, it is a bug in mandoc, not in firefox.

> <h1 class="Sh" id="SYNOPSIS">SYNOPSIS</h1>
> <table class="Nm">
>   <colgroup>
>     <col style="width: 13.00ex;"/>

At this point, we still have "font-weight: normal;".
So the column width is (about) 13 normal-weight characters.

>     <col/>
>   </colgroup>
>   <tr>
>     <td><b class="Nm">~/.ssh/config</b></td>

But here, we print 13 bold characters.
They don't fit and get wrapped.

> In lynx it displays fine.

Yes, the above is generally no problem width fixed-width fonts.
In mandoc -Tascii and mandoc -Tutf8, it also works fine.

Similar issues might exist in PostScript and PDF, but i'll
treat that as a different story for now.

Thanks for mentioning this,
  Ingo


Log Message:
-----------
Slightly increase widths calculated from string lengths (mainly 
for .Bl -tag lists and SYNOPSIS .Nm blocks), such that the text
still fits even if it is printed in bold font.  
This is an ugly band aid - but implementing font-dependent width
measurements would be a major project and even more difficult 
for HTML than for PostScript.

Issue reported by Jan Stary <hans at stare dot cz>.

Modified Files:
--------------
    mdocml:
        html.c
        mdoc_html.c

Revision Data
-------------
Index: html.c
===================================================================
RCS file: /home/cvs/mdocml/mdocml/html.c,v
retrieving revision 1.208
retrieving revision 1.209
diff -Lhtml.c -Lhtml.c -u -p -r1.208 -r1.209
--- html.c
+++ html.c
@@ -591,6 +591,8 @@ print_otag(struct html *h, enum htmltag 
 				break;
 			su = &mysu;
 			a2width(arg2, su);
+			/* Increase width to make even bold text fit. */
+			su->scale *= 1.1;
 			if (fmt[-1] == 'W')
 				su->scale *= -1.0;
 			break;
Index: mdoc_html.c
===================================================================
RCS file: /home/cvs/mdocml/mdocml/mdoc_html.c,v
retrieving revision 1.275
retrieving revision 1.276
diff -Lmdoc_html.c -Lmdoc_html.c -u -p -r1.275 -r1.276
--- mdoc_html.c
+++ mdoc_html.c
@@ -628,7 +628,8 @@ mdoc_nm_pre(MDOC_ARGS)
 		len = html_strlen(meta->name);
 
 	t = print_otag(h, TAG_COLGROUP, "");
-	print_otag(h, TAG_COL, "shw", len);
+	/* Increase width to make even bold text fit. */
+	print_otag(h, TAG_COL, "shw", len + 2);
 	print_otag(h, TAG_COL, "");
 	print_tagq(h, t);
 	print_otag(h, TAG_TR, "");
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