Implicit whitespace around inline equations

Implicit whitespace around inline equations

[Anthony J. Bentley]

Hi,

From glMultMatrixd(3):

    .P
    Where '$times$' denotes matrix multiplication,

This becomes the following HTML:

    <div class="Pp"></div>
    Where '
    <math class="eqn">
      <mrow><mo>&#215;</mo></mrow>
    </math>
    ' denotes matrix multiplication,

The newlines before and after the math element result in extra spaces
between the ' and the multiplication symbol.

Removing HTML_NLAROUND helps, but still results in a space after
the first ' that I haven't figured out:

Index: html.c
===================================================================
RCS file: /cvs/src/usr.bin/mandoc/html.c,v
retrieving revision 1.85
diff -u -p -r1.85 html.c
--- html.c	23 Jun 2017 02:31:39 -0000	1.85
+++ html.c	13 Jul 2017 16:02:41 -0000
@@ -82,7 +82,7 @@ static	const struct htmldata htmltags[TA
 	{"code",	0},
 	{"small",	0},
 	{"style",	HTML_NLALL | HTML_INDENT},
-	{"math",	HTML_NLALL | HTML_INDENT},
+	{"math",	HTML_NLINSIDE | HTML_INDENT},
 	{"mrow",	0},
 	{"mi",		0},
 	{"mn",		0},
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Re: Implicit whitespace around inline equations

[Ingo Schwarze]

Hi Anthony,

Anthony J. Bentley wrote on Thu, Jul 13, 2017 at 07:00:59PM -0600:

> From glMultMatrixd(3):
> 
>     .P
>     Where '$times$' denotes matrix multiplication,
> 
> This becomes the following HTML:
> 
>     <div class="Pp"></div>
>     Where '
>     <math class="eqn">
>       <mrow><mo>&#215;</mo></mrow>
>     </math>
>     ' denotes matrix multiplication,
> 
> The newlines before and after the math element result in extra spaces
> between the ' and the multiplication symbol.

Fixing this might get ugly because the inline eqn(7) handling in
roff.c is a hack, because you don't want

  preceding text
  .EQ
  a = b
  .EN
  following text

to render as

  preceding texta = bfollowing text

and because handling of source code spacing in -Thtml is tricky.

The impact of the issue is relatively small, just some bogus
horizontal spacing.

So i have added it to the TODO list.

Similarly for opprime, which is potentially hard to implement
and does not seem very pressing.

But thanks for reporting!
  Ingo
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