Re: Links into HTML page would be great

["Thomas Güttler" <guettliml@thomas-guettler.de>]

Wow, this link works now - great :-)

http://man.openbsd.org/OpenBSD-current/man5/ssh_config.5#ServerAliveInterval

Sometimes it is like paradise. You just need to speak out your whish.

Thank you!


Am 12.03.2017 um 20:39 schrieb Ingo Schwarze:
> Hi,
>
> Ingo Schwarze wrote on Sun, Mar 12, 2017 at 07:08:32PM +0100:
>> Thomas Guettler wrote on Tue, Feb 28, 2017 at 03:33:00PM +0100:
>
>>> it would be great if you could create a link which points to this:
>>> http://man.openbsd.org/OpenBSD-current/man5/ssh_config.5#ServerAliveInterval
>
>> You have a point.
>
>>> I have no clue how nroff works. I guess it is not easy to implement.
>
>> You may be wrong, it is likely not difficult.
>
> It turns out to be even easier than i anticipated.
>
> Here is a proof-of-concept patch that i just installed on man.openbsd.org.
> For now, it only does .Cm, merely because that's what Thomas used as
> his example, and also because it is one of the macros where this is
> useful.
>
> If people speak up here who like that, or if i come to the
> conclusion that i like it myself (which seems likely),
> i will probably add support for some more macros, probably
> .Ev .Fl .Ic .Ms .Dv .Li .No .Er .Sy .Em ,
> do some polishing (for example making sure the tag contains no
> invalid characters), then commit it in a few days.
>
> The two macros .Fn and .Fd are slightly more tricky and may need
> a bit of deliberation, but are probably feasible, too.
>
> At first, i was a bit worried because what exactly such a tagging
> facility will tag may not be completely stable over time.  But then
> it occurred to me that really isn't a big deal.  I mean, even if
> some external deep links sometimes go dead due to algorithmic changes,
> we are not worse off than right now.  Even if those links are never
> updated, they still point to the right page, only to the beginning
> of it.
>
> Yours,
>   Ingo
>
>
> Index: mdoc_html.c
> ===================================================================
> RCS file: /cvs/src/usr.bin/mandoc/mdoc_html.c,v
> retrieving revision 1.148
> diff -u -p -r1.148 mdoc_html.c
> --- mdoc_html.c	3 Mar 2017 13:55:06 -0000	1.148
> +++ mdoc_html.c	12 Mar 2017 19:23:54 -0000
> @@ -46,6 +46,7 @@ struct	htmlmdoc {
>  	void		(*post)(MDOC_ARGS);
>  };
>
> +static	const char	 *cond_id(const struct roff_node *);
>  static	char		 *make_id(const struct roff_node *);
>  static	void		  print_mdoc_head(MDOC_ARGS);
>  static	void		  print_mdoc_node(MDOC_ARGS);
> @@ -496,6 +497,22 @@ make_id(const struct roff_node *n)
>  	return buf;
>  }
>
> +static const char *
> +cond_id(const struct roff_node *n)
> +{
> +	if (n->child != NULL &&
> +	    n->child->type == ROFFT_TEXT &&
> +	    (n->prev == NULL ||
> +	     (n->prev->type == ROFFT_TEXT &&
> +	      strcmp(n->prev->string, "|") == 0)) &&
> +	    (n->parent->tok == MDOC_It ||
> +	     (n->parent->tok == MDOC_Xo &&
> +	      n->parent->parent->prev == NULL &&
> +	      n->parent->parent->parent->tok == MDOC_It)))
> +		return n->child->string;
> +	return NULL;
> +}
> +
>  static int
>  mdoc_sh_pre(MDOC_ARGS)
>  {
> @@ -549,7 +566,7 @@ mdoc_fl_pre(MDOC_ARGS)
>  static int
>  mdoc_cm_pre(MDOC_ARGS)
>  {
> -	print_otag(h, TAG_B, "c", "Cm");
> +	print_otag(h, TAG_B, "ci", "Cm", cond_id(n));
>  	return 1;
>  }
>
> --
>  To unsubscribe send an email to discuss+unsubscribe@mdocml.bsd.lv
>

-- 
Thomas Guettler http://www.thomas-guettler.de/
--
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