Re: Formatting help files

2010/6/2 Stahlman Family <brettstahlman@comcast.net>

Pablo Giménez wrote:

2010/6/2 Stahlman Family <brettstahlman@comcast.net>

Pablo Giménez wrote:
...[snip]...


 Pablo,

Thanks for the screenshot. I'll check into it tonight when I have
access to a real terminal on my Linux system at home. Do you mind
telling me what colorscheme and terminal you're using? Also, what type
of region is being applied to the text with the grey background (e.g.,
"TDVIM USER MANUAL")? (I'm guessing it's bold-italic, and you're using
a color terminal that doesn't really support italic, but displays it
as reverse video instead...)

 Probably is this, because I was wondering why the italics doesn´t appear

in
the terminal.
Yep it is trying to use bold italics.
The color scheme is CodeFactory:
http://www.vim.org/scripts/script.php?script_id=3079

Pablo,
I think I understand what's going on... If I'm correct, you are unable to
hide the special characters because your terminal's default background color
is black, but its "color palette" doesn't contain black. Note that in
addition to the default "Text color" and "Background color", color terminals
have what is known as a "Color palette". The colors in the color palette
(also known as the color cube) are completely independent of the Text color
and Background color. Vim's ctermfg/ctermbg mechanism works properly only
for colors in the color palette: thus, setting ctermbg or ctermfg to the
default Background color won't work unless the default Background color
happens to be in the color palette. In other words, the workarounds will
work only if the default background color is in the color palette.

Mmmm I am also using gnome-terminal and I have tried with both Linux console
and Xterm Built-in schemes. both have black in the palette and the
workaroundusing the autocommand is not working.
when I type:
:hi Ignore ctermfg=black
it works but not automatically using autocommands.
If I type  :au to get the list of all the autocommands I got this:
 colorStarted  ColorScheme
   *         hi Ignore ctermfg=black
             Refresh
So it seems that the command is properly registered and should be working.
Is the same command I use from teh command line so it should be doing
something.

Hmmm... That's very strange. Are you sure that the `hi Ignore ctermfg=black' command is never executed? I'm wondering whether it's possible that something else is changing the Ignore ctermfg setting after the `hi Ignore' command... There are several ways you could check this. The simplest is probably to run `:hi Ignore' at the command line, both just before and just after changing the colorscheme, to see what happens to ctermfg. Note that you can also set 'verbose' just before running `:colorscheme' to see the exact sequence of commands that are executed. (`set verbose=0' gets you out of verbose mode.)

I have changed the autocommand to:
augroup colorStarted
    if !has("gui_running")
        autocmd ColorScheme * hi Ignore ctermfg=0
    endif
    "autocmd ColorScheme * :Refresh
    augroup END

And running:
:verbose hi Ignore
Ignore         xxx ctermfg=0
        Last set from /usr/share/vim/vim71/syntax/syncolor.vim

Which I am not sure if it good or not.
Thing is that when I change to another colorcheme now the funny chracters dissapear. I amtrying now with the zenburn color scheme.
But the background color for the words with formatting is white rather than grey, which is the ciolor it should have.
Attached screenshot.
I have also checked if I am using a 256 terminal:
:echo &t_Co
I got 256, so it should be all right.

And because the command works from the command line I suppose the terminal
color palette has black.

Actually, you won't get an error for a standard color name such as "black", even if the color palette doesn't contain it. You would get an error only for an unknown color name such as "somesillycolor".

I have attached a screenshot which shows the same text in gvim, gnome-
terminal, and below xterm and gnome-termnial color settings.

Another problem seems to be the lack of italics support in my terminals
both, gnome-terminal and xterm don't shpw italics characters.
I have been googling a little but there aren't too much help for this. In
the gnome-terminal the only setting related to font style is enable/disable
bold fonts. How do you enable italics in your terminals.
I am using Deja Vu Sans Mono as the font for gnome-terminal.

I seem to remember urxvt supporting italic, but it doesn't seem to be working for me now. I'll investigate and get back with you...

Finally as a temp workaround One thing I can do is to disable text
formatting when a txtfmt file is opened in a non-gui environment and also if
it would be possible delete the funny characters, but just in the buffer not
in the file itself, it is possible?

Yes. Removing the characters in the buffer is fairly simple. Note that you can run...
:ShowTokenMap
...in a Txtfmt buffer to see which character codes are used for the various formatting regions. (You should be aware that the range of characters used is configurable.)

:help txtfmtTokrange

For a utf-8 encoding, the default range is 0xE000-0xE019. Thus, to get rid of all tokens in a buffer, I could do something like this:

%s/[\ue000-\ue019]//g

Of course, you probably would want to implement with autocommands in such a way that the original file cannot be modified by the person viewing it in a color terminal. I'm thinking of a solution that involves  reading a copy of the file into a readonly, "no file" buffer and then deleting the tokens. Since a "no file" buffer is not associated with a file, there would be no risk of the person viewing the file overwriting the original file containing the tokens. I'll try to come up with a possible implementation and get back with you after testing it...

Autocommands usually have a pattern to attach them to a filetype.
In my case I am setting the filetype using in my modeline ft=help,txtfmt.
So how I can make an autocommand in this situation that only affects help files with txtfmt enabled? I am asking becouse the extension of these files is txt, so I can't assign this  extension to the autocommand.
cheers

Sincerely,
Brett Stahlman

This way no matter user's terminal settings you can offer a workaround, just
disable any kind of formatting in your bufferm, and at least give something
readable.

cheers and thanks for your help

I don't know what color terminal you're using, but I was able to reproduce
what you were seeing in gnome-terminal. I was able to fix it by changing to
a color palette that contained black...

On the gnome-terminal title bar...

Edit->Profile Preferences...

...brings up a dialog with multiple tabs. On the "Colors" tab, you can
define the default foreground and background colors with the "Text color"
and "Background color" color pickers. Under "Palette", there's a combo box
that allows you to select from a number of built-in schemes. I was
originally using "Tango", which had a couple different shades of grey, but
no black. The others (Linux console, XTerm and Rxvt) all had black as the
first color in the palette. After I had switched to "Linux console", the
workarounds were successful...

Sincerely,

Brett Stahlman

 ...[snip]...

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Un saludo
Best Regards
Pablo Giménez

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