elisp question - hungry backspaces

elisp question - hungry backspaces

[Clemenceau]

Hello,
I'm writing an emacs major mode, and want to implement a hungry-delete
feature, much like the one c++-mode has. I've written the handler function,
which tells if the previous character is a space/tab or a real character,
and acts accordingly.

However... 
I'm having problems with deleting a marked region. I'm using
pc-selection-mode, and want the function to give priority to deleting a
region if one has been marked, before doing a hungry or 1-character
deletion. 

I've tried teaching my function to go to the start of the region and delete
it, which actually worked, but then any following backspace when a region
wasnt marked acted strangely - as if the first region was still marked.

It seems my problem is with telling whether or not the region is active.
Unless of course I don't understand my problem - in which case I'd also be
glad to be enlightened.

Any help would be greatly appreciated. 
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Re: elisp question - hungry backspaces

[David Hansen]

On Fri, 23 May 2008 11:41:50 -0700 (PDT) Clemenceau wrote:

> I'm writing an emacs major mode, and want to implement a hungry-delete
> feature, much like the one c++-mode has. I've written the handler function,
> which tells if the previous character is a space/tab or a real character,
> and acts accordingly.
>
> However... 
> I'm having problems with deleting a marked region. I'm using
> pc-selection-mode, and want the function to give priority to deleting a
> region if one has been marked, before doing a hungry or 1-character
> deletion. 

Why do you want to overwrite emacs standard behavior in the first place?

There already is:

  `backward-delete-char-untabify-method'
  `delete-selection-mode'

David