default file name to buffer name (was: reverting/notifying of files that no longer exist)

[Juri Linkov <juri@jurta.org>]

BTW, I'd like to suggest other improvements in `basic-save-buffer':

1. Add a default value to the minibuffer asking for the file name of
   the buffer not visiting any file.  It makes sense to use the buffer
   name as the default value of the file name.

2. Currently, if the user specifies the directory name in the minibuffer
   asking for the file name, then the user is asked later about
   overwriting the existing directory with a new file.  Since overwriting
   a directory with a file is too dangerous (or not possible at all
   on some systems), it is better to treat directory names specially
   and to ask the user about saving the file with the name composed
   from the specified directory name and the current buffer name.

Index: lisp/files.el
===================================================================
RCS file: /cvsroot/emacs/emacs/lisp/files.el,v
retrieving revision 1.707
diff -c -r1.707 files.el
*** lisp/files.el	26 Jun 2004 14:41:13 -0000	1.707
--- lisp/files.el	12 Jul 2004 15:17:43 -0000
***************
*** 3074,3084 ****
  	  (or buffer-file-name
  	      (let ((filename
  		     (expand-file-name
! 		      (read-file-name "File to save in: ") nil)))
! 		(and (file-exists-p filename)
! 		     (or (y-or-n-p (format "File `%s' exists; overwrite? "
! 					   filename))
! 			 (error "Canceled")))
  		(set-visited-file-name filename)))
  	  (or (verify-visited-file-modtime (current-buffer))
--- 3074,3092 ----
  	  (or buffer-file-name
  	      (let ((filename
  		     (expand-file-name
! 		      (read-file-name
! 		       (format "File to save in (default %s): " (buffer-name))
! 		       nil (expand-file-name (buffer-name))))))
! 		(if (file-exists-p filename)
! 		    (if (file-directory-p filename)
! 			(let ((new-name (concat (file-name-as-directory filename)
! 						(buffer-name))))
! 			  (if (y-or-n-p (format "Save as %s? " new-name))
! 			      (setq filename new-name)
! 			    (error "Canceled")))
! 		      (or (y-or-n-p (format "File %s exists; overwrite? "
! 					    filename))
! 			  (error "Canceled"))))
  		(set-visited-file-name filename)))
  	  (or (verify-visited-file-modtime (current-buffer))

-- 
Juri Linkov
http://www.jurta.org/emacs/