Re: Paragraph reformatting functionality

["G. Milde" <g.milde@xxxxxx>]

On 19.01.06, John E. Davis wrote:
> Roey Katz <roey@xxxxxxxxxxxxxxxx> wrote:
> >- I want to bind format_paragraph to a key (say, CTRL+semicolon, like 
> >"^;")
> 
>    Whether or not you can do this depends upon the capabilities of
>    your terminal.  If you are using Xjed it is easy.  If you are using
>    an old vt100 terminal, it is probably not possible.
> 
> >indent.  That is, I want this:
> >

- this is an item.  It goes on and on and on and on and on and on and on and on and on and on and on. 
- this is another item. It, too goes on and on and on and on and on and on
  and on and on and on.


> >
> >to look like this:
> >
> >   - this is an item.  It goes on and on and on and on and on and on and on
> >     and on and on and on and on.
> >   - this is another item. It, too goes on and on and on and on and on and
> >     on and on and on and on.
> 
> You can use hooks to achieve this effect.  For example, consider
> 
> define my_wrap_hook ()
> {
>    push_spot (); go_up(1); 
>    variable line = line_as_string ();
>    pop_spot ();
>    
>    variable res = ["[0-9]+\\. ",      %  5. this is item 5
>                    "[*+-] ",          %  * These are is a bullets
>                    ""                 %  Simulates WRAP_INDENTS=1;
>                   ];
>    foreach (res)
>      {
>         variable re = ();
>         re = strcat ("[ \t]*", re);
>         if (1 != string_match (line, re, 1))
>           continue;
>         variable len;
>         (,len) = string_match_nth (0);
>         push_spot ();
>         bol_trim ();
>         whitespace (len);
>         pop_spot ();
>         return;
>      }
> }
> 
> define text_mode_hook ()
> {
>    set_buffer_hook ("wrap_hook", "my_wrap_hook");
> }
> 
> In text-mode, the editor will call the wrap hook each time it wraps a
> line while you are typing.  The above function simply checks to see if
> the start of the previous line (the one that was just wrapped) matches
> any of the regular expressions, and if so indents the current line
> accordingly.
> 
> Keep in mind that the format_paragraph function knows nothing about
> this hook.
> 
> --John
> 
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-- 
Milde ife.et.tu-dresden.de

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