[RFC] trim.el -- Functions to delete extra whitespace

[RFC] trim.el -- Functions to delete extra whitespace

[Jari Aalto]

I'd lke to suggest adding trim.el to the distribution. It provides
handy functions to fix buffer's/region's whitespace problems.

The code is GPL

Jari

    http://xemacs.seanm.ca/lisp/trim.el

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trim                                    Function:
Searches for `regexp' and deletes any matches.
If optional arg `replace' is set, it replaces the match.
If the region is active, only trims the lines in the region.

trim-lines                              Function:
Trim whitespace (including CR) from the ends of all lines.
If the region is active, only trims the lines in the region.

trim-empty-lines                        Function:
Trim all empty lines.
An empty line is a line with only whitespace (space, tab, CR) characters.
If the region is active, only trims the lines in the region.

trim-spaces                             Function:
Trim all sequences of spaces to one space.
If the region is active, only trims the lines in the region.

trim-leading-spaces                     Function:
Trim all white space at the starts of lines.
If the region is active, only trims the lines in the region.

trim-defines                            Function:
Trim `#define' lines to isolate the `identifier'.
If the region is active, only trims the lines in the region.

untrim-lines                            Function:
Add ^M to the end of all lines.
If the region is active, only untrims the lines in the region.

Re: [RFC] trim.el -- Functions to delete extra whitespace

[Dan Nicolaescu]

Jari Aalto <jari.aalto@cante.net> writes:

  > I'd lke to suggest adding trim.el to the distribution. It provides
  > handy functions to fix buffer's/region's whitespace problems.

Does it provide anything that emacs/lisp/whitespace.el in CVS HEAD does
not provide?  If yes, then can the code be integrated in whitespace.el?
It's not desirable for users to have to learn about 2 different packages
to get very closely related functionality.

Re: [RFC] trim.el -- Functions to delete extra whitespace

[Vinicius Jose Latorre]

>   > I'd lke to suggest adding trim.el to the distribution. It provides
>   > handy functions to fix buffer's/region's whitespace problems.
>
> Does it provide anything that emacs/lisp/whitespace.el in CVS HEAD does
> not provide?  If yes, then can the code be integrated in whitespace.el?
> It's not desirable for users to have to learn about 2 different packages
> to get very closely related functionality.
>   


Yes, there are some functionalities that whitespace.el doesn't have,
that is, trim-defines (well, is this function useful?) and untrim-lines.
Both functions can be implemented in whitespace.el.

trim-spaces seems like just-one-space function.

Re: [RFC] trim.el -- Functions to delete extra whitespace

[Richard Stallman]

    Yes, there are some functionalities that whitespace.el doesn't have,
    that is, trim-defines (well, is this function useful?) and untrim-lines.
    Both functions can be implemented in whitespace.el.

Please make the useful extensions suggested by trim.el.

Re: [RFC] trim.el -- Functions to delete extra whitespace

[Dan Nicolaescu]

Vinicius Jose Latorre <viniciusjl@ig.com.br> writes:

  > >   > I'd lke to suggest adding trim.el to the distribution. It provides
  > >   > handy functions to fix buffer's/region's whitespace problems.
  > >
  > > Does it provide anything that emacs/lisp/whitespace.el in CVS HEAD does
  > > not provide?  If yes, then can the code be integrated in whitespace.el?
  > > It's not desirable for users to have to learn about 2 different packages
  > > to get very closely related functionality.
  > >   
  > 
  > 
  > Yes, there are some functionalities that whitespace.el doesn't have,
  > that is, trim-defines (well, is this function useful?) 

IMHO it is not.  What is the point of this function?

  > and untrim-lines.

The name of this function is confusing, and what it does is to add ^M at
the end of each line in the region.  Not useful.

Re: [RFC] trim.el -- Functions to delete extra whitespace

[Vinicius Jose Latorre]

>     Yes, there are some functionalities that whitespace.el doesn't have,
>     that is, trim-defines (well, is this function useful?) and untrim-lines.
>     Both functions can be implemented in whitespace.el.
>
> Please make the useful extensions suggested by trim.el.
>   

Well, I agree with Dan Nicolaescu that these functions are not so useful.

trim-defines seems to have a very specific usage.

untrim-lines only adds ^M at end of each line.
It seems the only usage should be to deal with CR LF for Windows text files,
probably when Emacs didn't deal with end of line depending on the 
environment,
that is, a very very long time ago.

All other functions are already implemented in whitespace.el,
except trim-spaces which seems to be a variant of just-one-space function.