Hi Mikkel,
> As you can see, there is also a mistake with the colors. I would also
> like to receive suggestions for how this error can be eliminated in
> the HTML rendering.
Here's how I worked out what the problem was.
$ printf '%s\n' \
> 'rod\m[red]knight\m[]rod' \
> 'rod\m[grey]matter\m[]rod' |
> troff -Thtml
...
H0
md
trod
mr 65535 0 0
tknight
md
trod
wh24
trodmatter
mr 65535 0 0
trod
n40 0
x trailer
V23999760
x stop
$
The `65535 0 0' just before the `knight' is the RGB for red. And I can
see an `md' after it before the black `rod' so that must reset it. But
there's no colour change for `matter', it's just in the same `t' as its
preceding `rod'. So `\m[grey]' isn't having an effect, and that
explains why the second `\m[]' is switching back to red, the previous
colour.
At this point, I turned on -wall. :-)
...
> troff -wall -Thtml >/dev/null
<standard input>:2: warning: color `grey' not defined
$
Sure enough,
$ grep -r 'defcolor.*\<grey\>' /usr/share/groff
/usr/share/groff/1.22.3/tmac/dvi.tmac:.defcolor grey rgb #bebebe
/usr/share/groff/1.22.3/tmac/ps.tmac:.defcolor grey rgb #bebebe
$
html.tmac has lots of colours, but not `grey'. You can define your own
so you know they will exist for different output devices.
Looking at the output of `troff -Thtml' for you three-colour, LCR,
tabbed, header I see the `devtag' for the centre column, so it's odd why
its content appears in the right-hand <td> in the HTML.
--
Cheers, Ralph.
https://plus.google.com/+RalphCorderoy
