Mercurial > hg > xemacs-beta
view lisp/buff-menu.el @ 665:fdefd0186b75
[xemacs-hg @ 2001-09-20 06:28:42 by ben]
The great integral types renaming.
The purpose of this is to rationalize the names used for various
integral types, so that they match their intended uses and follow
consist conventions, and eliminate types that were not semantically
different from each other.
The conventions are:
-- All integral types that measure quantities of anything are
signed. Some people disagree vociferously with this, but their
arguments are mostly theoretical, and are vastly outweighed by
the practical headaches of mixing signed and unsigned values,
and more importantly by the far increased likelihood of
inadvertent bugs: Because of the broken "viral" nature of
unsigned quantities in C (operations involving mixed
signed/unsigned are done unsigned, when exactly the opposite is
nearly always wanted), even a single error in declaring a
quantity unsigned that should be signed, or even the even more
subtle error of comparing signed and unsigned values and
forgetting the necessary cast, can be catastrophic, as
comparisons will yield wrong results. -Wsign-compare is turned
on specifically to catch this, but this tends to result in a
great number of warnings when mixing signed and unsigned, and
the casts are annoying. More has been written on this
elsewhere.
-- All such quantity types just mentioned boil down to EMACS_INT,
which is 32 bits on 32-bit machines and 64 bits on 64-bit
machines. This is guaranteed to be the same size as Lisp
objects of type `int', and (as far as I can tell) of size_t
(unsigned!) and ssize_t. The only type below that is not an
EMACS_INT is Hashcode, which is an unsigned value of the same
size as EMACS_INT.
-- Type names should be relatively short (no more than 10
characters or so), with the first letter capitalized and no
underscores if they can at all be avoided.
-- "count" == a zero-based measurement of some quantity. Includes
sizes, offsets, and indexes.
-- "bpos" == a one-based measurement of a position in a buffer.
"Charbpos" and "Bytebpos" count text in the buffer, rather than
bytes in memory; thus Bytebpos does not directly correspond to
the memory representation. Use "Membpos" for this.
-- "Char" refers to internal-format characters, not to the C type
"char", which is really a byte.
-- For the actual name changes, see the script below.
I ran the following script to do the conversion. (NOTE: This script
is idempotent. You can safely run it multiple times and it will
not screw up previous results -- in fact, it will do nothing if
nothing has changed. Thus, it can be run repeatedly as necessary
to handle patches coming in from old workspaces, or old branches.)
There are two tags, just before and just after the change:
`pre-integral-type-rename' and `post-integral-type-rename'. When
merging code from the main trunk into a branch, the best thing to
do is first merge up to `pre-integral-type-rename', then apply the
script and associated changes, then merge from
`post-integral-type-change' to the present. (Alternatively, just do
the merging in one operation; but you may then have a lot of
conflicts needing to be resolved by hand.)
Script `fixtypes.sh' follows:
----------------------------------- cut ------------------------------------
files="*.[ch] s/*.h m/*.h config.h.in ../configure.in Makefile.in.in ../lib-src/*.[ch] ../lwlib/*.[ch]"
gr Memory_Count Bytecount $files
gr Lstream_Data_Count Bytecount $files
gr Element_Count Elemcount $files
gr Hash_Code Hashcode $files
gr extcount bytecount $files
gr bufpos charbpos $files
gr bytind bytebpos $files
gr memind membpos $files
gr bufbyte intbyte $files
gr Extcount Bytecount $files
gr Bufpos Charbpos $files
gr Bytind Bytebpos $files
gr Memind Membpos $files
gr Bufbyte Intbyte $files
gr EXTCOUNT BYTECOUNT $files
gr BUFPOS CHARBPOS $files
gr BYTIND BYTEBPOS $files
gr MEMIND MEMBPOS $files
gr BUFBYTE INTBYTE $files
gr MEMORY_COUNT BYTECOUNT $files
gr LSTREAM_DATA_COUNT BYTECOUNT $files
gr ELEMENT_COUNT ELEMCOUNT $files
gr HASH_CODE HASHCODE $files
----------------------------------- cut ------------------------------------
`fixtypes.sh' is a Bourne-shell script; it uses 'gr':
----------------------------------- cut ------------------------------------
#!/bin/sh
# Usage is like this:
# gr FROM TO FILES ...
# globally replace FROM with TO in FILES. FROM and TO are regular expressions.
# backup files are stored in the `backup' directory.
from="$1"
to="$2"
shift 2
echo ${1+"$@"} | xargs global-replace "s/$from/$to/g"
----------------------------------- cut ------------------------------------
`gr' in turn uses a Perl script to do its real work,
`global-replace', which follows:
----------------------------------- cut ------------------------------------
: #-*- Perl -*-
### global-modify --- modify the contents of a file by a Perl expression
## Copyright (C) 1999 Martin Buchholz.
## Copyright (C) 2001 Ben Wing.
## Authors: Martin Buchholz <martin@xemacs.org>, Ben Wing <ben@xemacs.org>
## Maintainer: Ben Wing <ben@xemacs.org>
## Current Version: 1.0, May 5, 2001
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with XEmacs; see the file COPYING. If not, write to the Free
# Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
# 02111-1307, USA.
eval 'exec perl -w -S $0 ${1+"$@"}'
if 0;
use strict;
use FileHandle;
use Carp;
use Getopt::Long;
use File::Basename;
(my $myName = $0) =~ s@.*/@@; my $usage="
Usage: $myName [--help] [--backup-dir=DIR] [--line-mode] [--hunk-mode]
PERLEXPR FILE ...
Globally modify a file, either line by line or in one big hunk.
Typical usage is like this:
[with GNU print, GNU xargs: guaranteed to handle spaces, quotes, etc.
in file names]
find . -name '*.[ch]' -print0 | xargs -0 $0 's/\bCONST\b/const/g'\n
[with non-GNU print, xargs]
find . -name '*.[ch]' -print | xargs $0 's/\bCONST\b/const/g'\n
The file is read in, either line by line (with --line-mode specified)
or in one big hunk (with --hunk-mode specified; it's the default), and
the Perl expression is then evalled with \$_ set to the line or hunk of
text, including the terminating newline if there is one. It should
destructively modify the value there, storing the changed result in \$_.
Files in which any modifications are made are backed up to the directory
specified using --backup-dir, or to `backup' by default. To disable this,
use --backup-dir= with no argument.
Hunk mode is the default because it is MUCH MUCH faster than line-by-line.
Use line-by-line only when it matters, e.g. you want to do a replacement
only once per line (the default without the `g' argument). Conversely,
when using hunk mode, *ALWAYS* use `g'; otherwise, you will only make one
replacement in the entire file!
";
my %options = ();
$Getopt::Long::ignorecase = 0;
&GetOptions (
\%options,
'help', 'backup-dir=s', 'line-mode', 'hunk-mode',
);
die $usage if $options{"help"} or @ARGV <= 1;
my $code = shift;
die $usage if grep (-d || ! -w, @ARGV);
sub SafeOpen {
open ((my $fh = new FileHandle), $_[0]);
confess "Can't open $_[0]: $!" if ! defined $fh;
return $fh;
}
sub SafeClose {
close $_[0] or confess "Can't close $_[0]: $!";
}
sub FileContents {
my $fh = SafeOpen ("< $_[0]");
my $olddollarslash = $/;
local $/ = undef;
my $contents = <$fh>;
$/ = $olddollarslash;
return $contents;
}
sub WriteStringToFile {
my $fh = SafeOpen ("> $_[0]");
binmode $fh;
print $fh $_[1] or confess "$_[0]: $!\n";
SafeClose $fh;
}
foreach my $file (@ARGV) {
my $changed_p = 0;
my $new_contents = "";
if ($options{"line-mode"}) {
my $fh = SafeOpen $file;
while (<$fh>) {
my $save_line = $_;
eval $code;
$changed_p = 1 if $save_line ne $_;
$new_contents .= $_;
}
} else {
my $orig_contents = $_ = FileContents $file;
eval $code;
if ($_ ne $orig_contents) {
$changed_p = 1;
$new_contents = $_;
}
}
if ($changed_p) {
my $backdir = $options{"backup-dir"};
$backdir = "backup" if !defined ($backdir);
if ($backdir) {
my ($name, $path, $suffix) = fileparse ($file, "");
my $backfulldir = $path . $backdir;
my $backfile = "$backfulldir/$name";
mkdir $backfulldir, 0755 unless -d $backfulldir;
print "modifying $file (original saved in $backfile)\n";
rename $file, $backfile;
}
WriteStringToFile ($file, $new_contents);
}
}
----------------------------------- cut ------------------------------------
In addition to those programs, I needed to fix up a few other
things, particularly relating to the duplicate definitions of
types, now that some types merged with others. Specifically:
1. in lisp.h, removed duplicate declarations of Bytecount. The
changed code should now look like this: (In each code snippet
below, the first and last lines are the same as the original, as
are all lines outside of those lines. That allows you to locate
the section to be replaced, and replace the stuff in that
section, verifying that there isn't anything new added that
would need to be kept.)
--------------------------------- snip -------------------------------------
/* Counts of bytes or chars */
typedef EMACS_INT Bytecount;
typedef EMACS_INT Charcount;
/* Counts of elements */
typedef EMACS_INT Elemcount;
/* Hash codes */
typedef unsigned long Hashcode;
/* ------------------------ dynamic arrays ------------------- */
--------------------------------- snip -------------------------------------
2. in lstream.h, removed duplicate declaration of Bytecount.
Rewrote the comment about this type. The changed code should
now look like this:
--------------------------------- snip -------------------------------------
#endif
/* The have been some arguments over the what the type should be that
specifies a count of bytes in a data block to be written out or read in,
using Lstream_read(), Lstream_write(), and related functions.
Originally it was long, which worked fine; Martin "corrected" these to
size_t and ssize_t on the grounds that this is theoretically cleaner and
is in keeping with the C standards. Unfortunately, this practice is
horribly error-prone due to design flaws in the way that mixed
signed/unsigned arithmetic happens. In fact, by doing this change,
Martin introduced a subtle but fatal error that caused the operation of
sending large mail messages to the SMTP server under Windows to fail.
By putting all values back to be signed, avoiding any signed/unsigned
mixing, the bug immediately went away. The type then in use was
Lstream_Data_Count, so that it be reverted cleanly if a vote came to
that. Now it is Bytecount.
Some earlier comments about why the type must be signed: This MUST BE
SIGNED, since it also is used in functions that return the number of
bytes actually read to or written from in an operation, and these
functions can return -1 to signal error.
Note that the standard Unix read() and write() functions define the
count going in as a size_t, which is UNSIGNED, and the count going
out as an ssize_t, which is SIGNED. This is a horrible design
flaw. Not only is it highly likely to lead to logic errors when a
-1 gets interpreted as a large positive number, but operations are
bound to fail in all sorts of horrible ways when a number in the
upper-half of the size_t range is passed in -- this number is
unrepresentable as an ssize_t, so code that checks to see how many
bytes are actually written (which is mandatory if you are dealing
with certain types of devices) will get completely screwed up.
--ben
*/
typedef enum lstream_buffering
--------------------------------- snip -------------------------------------
3. in dumper.c, there are four places, all inside of switch()
statements, where XD_BYTECOUNT appears twice as a case tag. In
each case, the two case blocks contain identical code, and you
should *REMOVE THE SECOND* and leave the first.
| author | ben |
|---|---|
| date | Thu, 20 Sep 2001 06:31:11 +0000 |
| parents | 0f4bdbb07414 |
| children | 943eaba38521 |
line wrap: on
line source
;;; buff-menu.el --- buffer menu main function and support functions. ;; Copyright (C) 1985, 86, 87, 93, 94, 95 Free Software Foundation, Inc. ;; Maintainer: FSF ;; Keywords: extensions, dumped ;; This file is part of XEmacs. ;; XEmacs is free software; you can redistribute it and/or modify it ;; under the terms of the GNU General Public License as published by ;; the Free Software Foundation; either version 2, or (at your option) ;; any later version. ;; XEmacs is distributed in the hope that it will be useful, but ;; WITHOUT ANY WARRANTY; without even the implied warranty of ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU ;; General Public License for more details. ;; You should have received a copy of the GNU General Public License ;; along with XEmacs; see the file COPYING. If not, write to the Free ;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA ;; 02111-1307, USA. ;;; Synched up with: FSF 19.34 except as noted. ;;; Commentary: ;; This file is dumped with XEmacs. ;; Edit, delete, or change attributes of all currently active Emacs ;; buffers from a list summarizing their state. A good way to browse ;; any special or scratch buffers you have loaded, since you can't find ;; them by filename. The single entry point is `Buffer-menu-mode', ;; normally bound to C-x C-b. ;;; Change Log: ;; Merged by esr with recent mods to Emacs 19 buff-menu, 23 Mar 1993 ;; ;; Modified by Bob Weiner, Motorola, Inc., 4/14/89 ;; ;; Added optional backup argument to 'Buffer-menu-unmark' to make it undelete ;; current entry and then move to previous one. ;; ;; Based on FSF code dating back to 1985. ;;; Code: ;;;Trying to preserve the old window configuration works well in ;;;simple scenarios, when you enter the buffer menu, use it, and exit it. ;;;But it does strange things when you switch back to the buffer list buffer ;;;with C-x b, later on, when the window configuration is different. ;;;The choice seems to be, either restore the window configuration ;;;in all cases, or in no cases. ;;;I decided it was better not to restore the window config at all. -- rms. ;;;But since then, I changed buffer-menu to use the selected window, ;;;so q now once again goes back to the previous window configuration. ;;;(defvar Buffer-menu-window-config nil ;;; "Window configuration saved from entry to `buffer-menu'.") ; Put buffer *Buffer List* into proper mode right away ; so that from now on even list-buffers is enough to get a buffer menu. (defvar Buffer-menu-buffer-column 4) (defvar Buffer-menu-mode-map nil) (if Buffer-menu-mode-map () (setq Buffer-menu-mode-map (make-keymap)) (suppress-keymap Buffer-menu-mode-map t) (set-keymap-name Buffer-menu-mode-map 'Buffer-menu-mode-map) ; XEmacs (define-key Buffer-menu-mode-map "q" 'Buffer-menu-quit) (define-key Buffer-menu-mode-map "v" 'Buffer-menu-select) (define-key Buffer-menu-mode-map "2" 'Buffer-menu-2-window) (define-key Buffer-menu-mode-map "1" 'Buffer-menu-1-window) (define-key Buffer-menu-mode-map "f" 'Buffer-menu-this-window) (define-key Buffer-menu-mode-map "\C-m" 'Buffer-menu-this-window) (define-key Buffer-menu-mode-map "o" 'Buffer-menu-other-window) (define-key Buffer-menu-mode-map "\C-o" 'Buffer-menu-switch-other-window) (define-key Buffer-menu-mode-map "s" 'Buffer-menu-save) (define-key Buffer-menu-mode-map "d" 'Buffer-menu-delete) (define-key Buffer-menu-mode-map "k" 'Buffer-menu-delete) (define-key Buffer-menu-mode-map "\C-d" 'Buffer-menu-delete-backwards) (define-key Buffer-menu-mode-map "\C-k" 'Buffer-menu-delete) (define-key Buffer-menu-mode-map "x" 'Buffer-menu-execute) (define-key Buffer-menu-mode-map " " 'next-line) (define-key Buffer-menu-mode-map "n" 'next-line) (define-key Buffer-menu-mode-map "p" 'previous-line) (define-key Buffer-menu-mode-map 'backspace 'Buffer-menu-backup-unmark) (define-key Buffer-menu-mode-map 'delete 'Buffer-menu-backup-unmark) (define-key Buffer-menu-mode-map "~" 'Buffer-menu-not-modified) (define-key Buffer-menu-mode-map "?" 'describe-mode) (define-key Buffer-menu-mode-map "u" 'Buffer-menu-unmark) (define-key Buffer-menu-mode-map "m" 'Buffer-menu-mark) (define-key Buffer-menu-mode-map "t" 'Buffer-menu-visit-tags-table) (define-key Buffer-menu-mode-map "%" 'Buffer-menu-toggle-read-only) (define-key Buffer-menu-mode-map "g" 'revert-buffer) (define-key Buffer-menu-mode-map 'button2 'Buffer-menu-mouse-select) (define-key Buffer-menu-mode-map 'button3 'Buffer-menu-popup-menu) ) ;; Buffer Menu mode is suitable only for specially formatted data. (put 'Buffer-menu-mode 'mode-class 'special) (defun Buffer-menu-mode () "Major mode for editing a list of buffers. Each line describes one of the buffers in Emacs. Letters do not insert themselves; instead, they are commands. \\<Buffer-menu-mode-map> \\[Buffer-menu-mouse-select] -- select buffer you click on, in place of the buffer menu. \\[Buffer-menu-this-window] -- select current line's buffer in place of the buffer menu. \\[Buffer-menu-other-window] -- select that buffer in another window, so the buffer menu buffer remains visible in its window. \\[Buffer-menu-switch-other-window] -- make another window display that buffer. \\[Buffer-menu-mark] -- mark current line's buffer to be displayed. \\[Buffer-menu-select] -- select current line's buffer. Also show buffers marked with m, in other windows. \\[Buffer-menu-1-window] -- select that buffer in full-frame window. \\[Buffer-menu-2-window] -- select that buffer in one window, together with buffer selected before this one in another window. \\[Buffer-menu-visit-tags-table] -- visit-tags-table this buffer. \\[Buffer-menu-not-modified] -- clear modified-flag on that buffer. \\[Buffer-menu-save] -- mark that buffer to be saved, and move down. \\[Buffer-menu-delete] -- mark that buffer to be deleted, and move down. \\[Buffer-menu-delete-backwards] -- mark that buffer to be deleted, and move up. \\[Buffer-menu-execute] -- delete or save marked buffers. \\[Buffer-menu-unmark] -- remove all kinds of marks from current line. With prefix argument, also move up one line. \\[Buffer-menu-backup-unmark] -- back up a line and remove marks. \\[Buffer-menu-toggle-read-only] -- toggle read-only status of buffer on this line." (kill-all-local-variables) (use-local-map Buffer-menu-mode-map) (setq major-mode 'Buffer-menu-mode) (setq mode-name "Buffer Menu") (make-local-variable 'revert-buffer-function) (setq revert-buffer-function 'Buffer-menu-revert-function) (setq truncate-lines t) (setq buffer-read-only t) (make-local-hook 'mouse-track-click-hook) ; XEmacs (add-hook 'mouse-track-click-hook 'Buffer-menu-maybe-mouse-select t t) ; XEmacs (run-hooks 'buffer-menu-mode-hook)) (defun Buffer-menu-revert-function (ignore1 ignore2) (list-buffers)) (defun Buffer-menu-buffer (error-if-non-existent-p) "Return buffer described by this line of buffer menu." (let* ((where (save-excursion (beginning-of-line) (+ (point) Buffer-menu-buffer-column))) (name (and (not (eobp)) (get-text-property where 'buffer-name)))) (if name (or (get-buffer name) (if error-if-non-existent-p (error "No buffer named `%s'" name) nil)) (if error-if-non-existent-p (error "No buffer on this line") nil)))) (defun buffer-menu (&optional arg) "Make a menu of buffers so you can save, delete or select them. With argument, show only buffers that are visiting files. Type ? after invocation to get help on commands available. Type q immediately to make the buffer menu go away." (interactive "P") ;;; (setq Buffer-menu-window-config (current-window-configuration)) (switch-to-buffer (list-buffers-noselect arg)) (message "Commands: d, s, x, u; f, o, 1, 2, m, v; ~, %%; q to quit; ? for help.")) (defun buffer-menu-other-window (&optional arg) "Display a list of buffers in another window. With the buffer list buffer, you can save, delete or select the buffers. With argument, show only buffers that are visiting files. Type ? after invocation to get help on commands available. Type q immediately to make the buffer menu go away." (interactive "P") ;;; (setq Buffer-menu-window-config (current-window-configuration)) (switch-to-buffer-other-window (list-buffers-noselect arg)) (message "Commands: d, s, x, u; f, o, 1, 2, m, v; ~, %%; q to quit; ? for help.")) (defun Buffer-menu-quit () "Quit the buffer menu." (interactive) (let ((buffer (current-buffer))) ;; Switch away from the buffer menu and bury it. (switch-to-buffer (other-buffer)) (bury-buffer buffer))) (defun Buffer-menu-mark () "Mark buffer on this line for being displayed by \\<Buffer-menu-mode-map>\\[Buffer-menu-select] command." (interactive) (beginning-of-line) (if (looking-at " [-M]") (ding) (let ((buffer-read-only nil)) (delete-char 1) (insert ?>) (forward-line 1)))) (defun Buffer-menu-unmark (&optional backup) "Cancel all requested operations on buffer on this line and move down. Optional ARG means move up." (interactive "P") (beginning-of-line) (if (looking-at " [-M]") (ding) (let* ((buf (Buffer-menu-buffer t)) (mod (buffer-modified-p buf)) (readonly (save-excursion (set-buffer buf) buffer-read-only)) (buffer-read-only nil)) (delete-char 3) (insert (if readonly (if mod " *%" " %") (if mod " * " " "))))) (forward-line (if backup -1 1))) (defun Buffer-menu-backup-unmark () "Move up and cancel all requested operations on buffer on line above." (interactive) (forward-line -1) (Buffer-menu-unmark) (forward-line -1)) (defun Buffer-menu-delete (&optional arg) "Mark buffer on this line to be deleted by \\<Buffer-menu-mode-map>\\[Buffer-menu-execute] command. Prefix arg is how many buffers to delete. Negative arg means delete backwards." (interactive "p") (beginning-of-line) (if (looking-at " [-M]") ;header lines (ding) (let ((buffer-read-only nil)) (if (or (null arg) (= arg 0)) (setq arg 1)) (while (> arg 0) (delete-char 1) (insert ?D) (forward-line 1) (setq arg (1- arg))) (while (< arg 0) (delete-char 1) (insert ?D) (forward-line -1) (setq arg (1+ arg)))))) (defun Buffer-menu-delete-backwards (&optional arg) "Mark buffer on this line to be deleted by \\<Buffer-menu-mode-map>\\[Buffer-menu-execute] command and then move up one line. Prefix arg means move that many lines." (interactive "p") (Buffer-menu-delete (- (or arg 1))) (while (looking-at " [-M]") (forward-line 1))) (defun Buffer-menu-save () "Mark buffer on this line to be saved by \\<Buffer-menu-mode-map>\\[Buffer-menu-execute] command." (interactive) (beginning-of-line) (if (looking-at " [-M]") ;header lines (ding) (let ((buffer-read-only nil)) (forward-char 1) (delete-char 1) (insert ?S) (forward-line 1)))) (defun Buffer-menu-not-modified (&optional arg) "Mark buffer on this line as unmodified (no changes to save)." (interactive "P") (save-excursion (set-buffer (Buffer-menu-buffer t)) (set-buffer-modified-p arg)) (save-excursion (beginning-of-line) (forward-char 1) (if (= (char-after (point)) (if arg ? ?*)) (let ((buffer-read-only nil)) (delete-char 1) (insert (if arg ?* ? )))))) (defun Buffer-menu-execute () "Save and/or delete buffers marked with \\<Buffer-menu-mode-map>\\[Buffer-menu-save] or \\<Buffer-menu-mode-map>\\[Buffer-menu-delete] commands." (interactive) (save-excursion (goto-char (point-min)) (forward-line 1) (while (re-search-forward "^.S" nil t) (let ((modp nil)) (save-excursion (set-buffer (Buffer-menu-buffer t)) (save-buffer) (setq modp (buffer-modified-p))) (let ((buffer-read-only nil)) (delete-char -1) (insert (if modp ?* ? )))))) (save-excursion (goto-char (point-min)) (forward-line 1) (let ((buff-menu-buffer (current-buffer)) (buffer-read-only nil)) (while (search-forward "\nD" nil t) (backward-char 1) (let ((buf (Buffer-menu-buffer nil))) (or (eq buf nil) (eq buf buff-menu-buffer) (save-excursion (kill-buffer buf)))) (if (Buffer-menu-buffer nil) (progn (delete-char 1) (insert ? )) (delete-region (point) (progn (forward-line 1) (point))) (backward-char 1)))))) (defun Buffer-menu-select () "Select this line's buffer; also display buffers marked with `>'. You can mark buffers with the \\<Buffer-menu-mode-map>\\[Buffer-menu-mark] command. This command deletes and replaces all the previously existing windows in the selected frame." (interactive) (let ((buff (Buffer-menu-buffer t)) (menu (current-buffer)) (others ()) tem) (goto-char (point-min)) (while (search-forward "\n>" nil t) (setq tem (Buffer-menu-buffer t)) (let ((buffer-read-only nil)) (delete-char -1) (insert ?\ )) (or (eq tem buff) (memq tem others) (setq others (cons tem others)))) (setq others (nreverse others) tem (/ (1- (frame-height)) (1+ (length others)))) (delete-other-windows) (switch-to-buffer buff) (or (eq menu buff) (bury-buffer menu)) (if (equal (length others) 0) (progn ;;; ;; Restore previous window configuration before displaying ;;; ;; selected buffers. ;;; (if Buffer-menu-window-config ;;; (progn ;;; (set-window-configuration Buffer-menu-window-config) ;;; (setq Buffer-menu-window-config nil))) (switch-to-buffer buff)) (while others (split-window nil tem) (other-window 1) (switch-to-buffer (car others)) (setq others (cdr others))) (other-window 1) ;back to the beginning! ))) (eval-when-compile (autoload 'visit-tags-table "etags")) (defun Buffer-menu-visit-tags-table () "Visit the tags table in the buffer on this line. See `visit-tags-table'." (interactive) (let ((file (buffer-file-name (Buffer-menu-buffer t)))) (if file (visit-tags-table file) (error "Specified buffer has no file")))) (defun Buffer-menu-1-window () "Select this line's buffer, alone, in full frame." (interactive) (switch-to-buffer (Buffer-menu-buffer t)) (bury-buffer (other-buffer)) (delete-other-windows) ;; XEmacs: ;; This is to get w->force_start set to nil. Don't ask me, I only work here. (set-window-buffer (selected-window) (current-buffer))) (defun Buffer-menu-mouse-select (event) "Select the buffer whose line you click on." (interactive "e") (let (buffer) (save-excursion (set-buffer (event-buffer event)) ; XEmacs (save-excursion (goto-char (event-point event)) ; XEmacs (setq buffer (Buffer-menu-buffer t)))) (select-window (event-window event)) ; XEmacs (if (and (window-dedicated-p (selected-window)) (eq (selected-window) (frame-root-window))) (switch-to-buffer-other-frame buffer) (switch-to-buffer buffer)))) ;; XEmacs (defun Buffer-menu-maybe-mouse-select (event &optional click-count) (interactive "e") (and (>= click-count 2) (let ((buffer (current-buffer)) (point (point)) (config (current-window-configuration))) (condition-case nil (progn (Buffer-menu-mouse-select event) t) (error (set-window-configuration config) (set-buffer buffer) (goto-char point) nil))))) (defun Buffer-menu-this-window () "Select this line's buffer in this window." (interactive) (switch-to-buffer (Buffer-menu-buffer t))) (defun Buffer-menu-other-window () "Select this line's buffer in other window, leaving buffer menu visible." (interactive) (switch-to-buffer-other-window (Buffer-menu-buffer t))) (defun Buffer-menu-switch-other-window () "Make the other window select this line's buffer. The current window remains selected." (interactive) (display-buffer (Buffer-menu-buffer t))) (defun Buffer-menu-2-window () "Select this line's buffer, with previous buffer in second window." (interactive) (let ((buff (Buffer-menu-buffer t)) (menu (current-buffer)) (pop-up-windows t)) (delete-other-windows) (switch-to-buffer (other-buffer)) (pop-to-buffer buff) (bury-buffer menu))) (defun Buffer-menu-toggle-read-only () "Toggle read-only status of buffer on this line, perhaps via version control." (interactive) (let (char) (save-excursion (set-buffer (Buffer-menu-buffer t)) (modeline-toggle-read-only) (setq char (if buffer-read-only ?% ? ))) (save-excursion (beginning-of-line) (forward-char 2) (if (/= (following-char) char) (let (buffer-read-only) (delete-char 1) (insert char)))))) ;; XEmacs (defvar Buffer-menu-popup-menu '("Buffer Commands" ["Select Buffer" Buffer-menu-select t] ["Select buffer Other Window" Buffer-menu-other-window t] ["Clear Buffer Modification Flag" Buffer-menu-not-modified t] "----" ["Mark Buffer for Selection" Buffer-menu-mark t] ["Mark Buffer for Save" Buffer-menu-save t] ["Mark Buffer for Deletion" Buffer-menu-delete t] ["Unmark Buffer" Buffer-menu-unmark t] "----" ["Delete/Save Marked Buffers" Buffer-menu-execute t] )) ;; XEmacs (defun Buffer-menu-popup-menu (event) (interactive "e") (mouse-set-point event) (beginning-of-line) (let ((buffer (Buffer-menu-buffer nil))) (if buffer (popup-menu (nconc (list (car Buffer-menu-popup-menu) (concat "Commands on buffer \"" (buffer-name buffer) "\":") "----") (cdr Buffer-menu-popup-menu))) (error "no buffer on this line")))) ;; XEmacs (defvar list-buffers-header-line (concat " MR Buffer Size Mode File\n" " -- ------ ---- ---- ----\n")) ;; XEmacs (defvar list-buffers-identification 'default-list-buffers-identification "String used to identify this buffer, or a function of one argument to generate such a string. This variable is always buffer-local.") (make-variable-buffer-local 'list-buffers-identification) ;; XEmacs ;;;###autoload (defvar list-buffers-directory nil) ;;;###autoload (make-variable-buffer-local 'list-buffers-directory) ;; #### not synched (defun default-list-buffers-identification (output) (save-excursion (let ((file (or (buffer-file-name (current-buffer)) (and (boundp 'list-buffers-directory) list-buffers-directory))) (size (buffer-size)) (mode mode-name) eob p s col) (set-buffer output) (end-of-line) (setq eob (point)) (prin1 size output) (setq p (point)) ;; right-justify the size (move-to-column 19 t) (setq col (point)) (if (> eob col) (goto-char eob)) (setq s (- 6 (- p col))) (while (> s 0) ; speed/consing tradeoff... (insert ? ) (setq s (1- s))) (end-of-line) (indent-to 27 1) (insert mode) (if (not file) nil ;; if the mode-name is really long, clip it for the filename (if (> 0 (setq s (- 39 (current-column)))) (delete-char (max s (- eob (point))))) (indent-to 40 1) (insert file))))) ;; #### not synched (defun list-buffers-internal (output &optional predicate) (let ((current (current-buffer)) (buffers (buffer-list))) (save-excursion (set-buffer output) (setq buffer-read-only nil) (erase-buffer) (buffer-disable-undo output) (insert list-buffers-header-line) (while buffers (let* ((col1 19) (buffer (car buffers)) (name (buffer-name buffer)) this-buffer-line-start) (setq buffers (cdr buffers)) (cond ((null name)) ;deleted buffer ((and predicate (not (if (stringp predicate) (string-match predicate name) (funcall predicate buffer)))) nil) (t (set-buffer buffer) (let ((ro buffer-read-only) (id list-buffers-identification)) (set-buffer output) (setq this-buffer-line-start (point)) (insert (if (eq buffer current) (progn (setq current (point)) ?\.) ?\ )) (insert (if (buffer-modified-p buffer) ?\* ?\ )) (insert (if ro ?\% ?\ )) (if (string-match "[\n\"\\ \t]" name) (let ((print-escape-newlines t)) (prin1 name output)) (insert ?\ name)) (indent-to col1 1) (cond ((stringp id) (insert id)) (id (set-buffer buffer) (condition-case e (funcall id output) (error (princ "***" output) (prin1 e output))) (set-buffer output) (goto-char (point-max))))) (put-nonduplicable-text-property this-buffer-line-start (point) 'buffer-name name) (put-nonduplicable-text-property this-buffer-line-start (point) 'highlight t) (insert ?\n))))) (Buffer-menu-mode) (if (not (bufferp current)) (goto-char current))))) ;(define-key ctl-x-map "\C-b" 'list-buffers) (defun list-buffers (&optional files-only) "Display a list of names of existing buffers. The list is displayed in a buffer named `*Buffer List*'. Note that buffers with names starting with spaces are omitted. Non-nil optional arg FILES-ONLY means mention only file buffers. The M column contains a * for buffers that are modified. The R column contains a % for buffers that are read-only." (interactive (list (if current-prefix-arg t nil))) ; XEmacs (display-buffer (list-buffers-noselect files-only))) ;; #### not synched (defun list-buffers-noselect (&optional files-only) "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-nil optional arg FILES-ONLY means mention only file buffers. The M column contains a * for buffers that are modified. The R column contains a % for buffers that are read-only." (let ((buffer (get-buffer-create "*Buffer List*"))) (list-buffers-internal buffer (if (memq files-only '(t nil)) #'(lambda (b) (let ((n (buffer-name b))) (cond ((and (/= 0 (length n)) (= (aref n 0) ?\ )) ;;don't mention if starts with " " nil) (files-only (buffer-file-name b)) (t t)))) files-only)) buffer)) (defun buffers-menu-omit-invisible-buffers (buf) "For use as a value of `buffers-menu-omit-function'. Omits normally invisible buffers (those whose name begins with a space)." (not (null (string-match "\\` " (buffer-name buf))))) (provide 'buff-menu) ;;; buff-menu.el ends here