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list buffers
From: |
Matthias Meulien |
Subject: |
list buffers |
Date: |
14 Nov 2004 13:56:56 +0530 |
User-agent: |
Gnus/5.09 (Gnus v5.9.0) Emacs/21.3 |
In GNU Emacs 21.3.1 (i386-pc-linux-gnu, X toolkit, Xaw3d scroll bars)
of 2004-04-07 on raven, modified by Debian
configured using `configure '--build=i386-linux' '--host=i386-linux'
'--prefix=/usr' '--sharedstatedir=/var/lib' '--libexecdir=/usr/lib'
'--localstatedir=/var/lib' '--infodir=/usr/share/info'
'--mandir=/usr/share/man' '--with-pop=yes' '--with-x=yes'
'--with-x-toolkit=athena' 'CFLAGS=-DDEBIAN -g -O2' 'build_alias=i386-linux'
'host_alias=i386-linux''
Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:
I describe a missing feature rather than a bug. I hope it's the right
place to do so (there is no maintener email in the file
`buff-menu.el').
One wants to be able to browse, delete, etc buffers that will be saved
by the library `desktop.el' (for example such a function could be in
the `kill-emacs-query-functions' variable).
The following function (written by Kevin Rodgers) return the right
list of buffers:
(defun desktop-save-buffer-list ()
"Return the list of buffers that `desktop-save' would save."
(let ((buffer-list '()))
(mapc (lambda (buffer)
(with-current-buffer buffer
(when (desktop-save-buffer-p (buffer-file-name)
(buffer-name)
major-mode)
(setq buffer-list (cons buffer buffer-list)))))
(buffer-list))
(nreverse buffer-list)))
But the browsing, deleting, etc facilities are missing.
To fix this, one needs a light improvment of `list-buffers-noselect'.
It should be possible to pass a second optional argument to this
function, namely a list of buffers; in case this argument is non-nil,
the displayed list of buffers in the buffer *Buffer List* is the one
passed as argument so that the user can browse, etc this list of
buffers.
For clarity, I insert the (trivial) code to implement this:
(defun list-buffers-noselect (&optional files-only arg)
"Create and return a buffer with a list of names of existing buffers.
The buffer is named `*Buffer List*'.
Note that buffers with names starting with spaces are omitted.
Non-null optional arg FILES-ONLY means mention only file buffers.
If the optional arg ARG is non-null, then it is interpreted as the list
of buffers to be listed.
The M column contains a * for buffers that are modified.
The R column contains a % for buffers that are read-only."
(let ((old-buffer (current-buffer))
(standard-output standard-output)
desired-point)
(save-excursion
(set-buffer (get-buffer-create "*Buffer List*"))
(setq buffer-read-only nil)
(erase-buffer)
(setq standard-output (current-buffer))
(princ "\
MR Buffer Size Mode File
-- ------ ---- ---- ----
")
;; Record the column where buffer names start.
(setq Buffer-menu-buffer-column 4)
(dolist (buffer (or arg (buffer-list)))
(let ((name (buffer-name buffer))
(...)
Here is the wanted example:
(defun list-desktop-buffers (&optional files-only)
"Display a list of names of buffers that will be saved by
`desktop-save. The list is displayed in a buffer named `*Buffer List*'
(see `list-buffers')."
(interactive "P")
(display-buffer (list-buffers-noselect
files-only (desktop-save-buffer-list))))
Regards,
--
Matthias Meulien
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