| blob | 2925811997425412579306bcb8098f15e5ceadc5 |
1 ;;; bs.el --- menu for selecting and displaying buffers
3 ;; Copyright (C) 1998, 1999, 2000, 2001, 2004 Free Software Foundation, Inc.
4 ;; Author: Olaf Sylvester <Olaf.Sylvester@netsurf.de>
5 ;; Maintainer: Olaf Sylvester <Olaf.Sylvester@netsurf.de>
6 ;; Keywords: convenience
8 ;; This file is part of GNU Emacs.
10 ;; GNU Emacs is free software; you can redistribute it and/or modify
11 ;; it under the terms of the GNU General Public License as published by
12 ;; the Free Software Foundation; either version 2, or (at your option)
13 ;; any later version.
15 ;; GNU Emacs is distributed in the hope that it will be useful,
16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 ;; GNU General Public License for more details.
20 ;; You should have received a copy of the GNU General Public License
21 ;; along with GNU Emacs; see the file COPYING. If not, write to the
22 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 ;; Boston, MA 02111-1307, USA.
25 ;;; Commentary:
27 ;; Version: 1.17
28 ;; X-URL: http://home.netsurf.de/olaf.sylvester/emacs
29 ;;
30 ;; The bs-package contains a main function bs-show for poping up a
31 ;; buffer in a way similar to `list-buffers' and `electric-buffer-list':
32 ;; The new buffer offers a Buffer Selection Menu for manipulating
33 ;; the buffer list and buffers.
34 ;;
35 ;; -----------------------------------------------------------------------
36 ;; | MR Buffer Size Mode File |
37 ;; | -- ------ ---- ---- ---- |
38 ;; |. bs.el 14690 Emacs-Lisp /home/sun/sylvester/el/bs.e$|
39 ;; | % executable.el 9429 Emacs-Lisp /usr/share/emacs/19.34/lisp$|
40 ;; | % vc.el 104893 Emacs-Lisp /usr/share/emacs/19.34/lisp$|
41 ;; | % test_vc.el 486 Emacs-Lisp /home/sun/sylvester/el/test$|
42 ;; | % vc-hooks.el 43605 Emacs-Lisp /usr/share/emacs/19.34/lisp$|
43 ;; -----------------------------------------------------------------------
45 ;;; Quick Installation und Customization:
47 ;; Use
48 ;; M-x bs-show
49 ;; for buffer selection or optional bind a key to main function `bs-show'
50 ;; (global-set-key "\C-x\C-b" 'bs-show) ;; or another key
51 ;;
52 ;; For customization use
53 ;; M-x bs-customize
56 ;;; More Commentary:
58 ;; bs-show will generate a new buffer named *buffer-selection*, which shows
59 ;; all buffers or a subset of them, and has possibilities for deleting,
60 ;; saving and selecting buffers. For more details see docstring of
61 ;; function `bs-mode'. A current configuration describes which buffers appear
62 ;; in *buffer-selection*. See docstring of variable `bs-configurations' for
63 ;; more details.
64 ;;
65 ;; The package bs combines the advantages of the Emacs functions
66 ;; `list-buffers' and `electric-buffer-list'.
67 ;;
68 ;; Additional features for Buffer Selection Menu:
69 ;; - configurable list of buffers (show only files etc.).
70 ;; - comfortable way to change displayed subset of all buffers.
71 ;; - show sorted list of buffers.
72 ;; - cyclic navigation:
73 ;; - goes to top of buffer list if you are on last line and press down.
74 ;; - goes to end of buffer list if you are on first line and press up.
75 ;; - Offer an alternative buffer list by prefix key C-u.
77 ;;; Cycling through buffers
79 ;; This package offers two functions for buffer cycling. If you want to cycle
80 ;; through buffer list you can use `bs-cycle-next' or `bs-cycle-previous'.
81 ;; Bind these function to a key like
82 ;; (global-set-key [(f9)] 'bs-cycle-previous)
83 ;; (global-set-key [(f10)] 'bs-cycle-next)
84 ;;
85 ;; Both functions use a special subset of all buffers for cycling to avoid
86 ;; to go through internal buffers like *Messages*.
87 ;;
88 ;; Cycling through buffers ignores sorting because sorting destroys
89 ;; the logical buffer list. If buffer list is sorted by size you
90 ;; won't be able to cycle to the smallest buffer.
92 ;;; Customization:
94 ;; There is a customization group called `bs' in group `convenience'.
95 ;; Start customization by M-x bs-customize
96 ;;
97 ;; Buffer list
98 ;; -----------
99 ;; You can define your own configurations by extending variable
100 ;; `bs-configurations' (see docstring for details).
101 ;;
102 ;; `bs-default-configuration' contains the name of default configuration.
103 ;; The default value is "files" which means to show only files.
104 ;;
105 ;; If you always want to see all buffers, customize variable
106 ;; `bs-default-configuration' in customization group `bs'.
107 ;;
108 ;; Configure sorting
109 ;; -----------------
110 ;; You can define functions for sorting the buffer list.
111 ;; When selecting buffers, you can step through available sorting
112 ;; methods with key 'S'.
113 ;; To define a new way of sorting, customize variable `bs-sort-functions'.
114 ;;
115 ;; There are four basic functions for sorting:
116 ;; by buffer name, by mode, by size, or by filename
117 ;;
118 ;; Configure buffer cycling
119 ;; ------------------------
120 ;; When cycling through buffer list the functions for cycling will use
121 ;; the current configuration of bs to calculate the buffer list.
122 ;; If you want to use a different configuration for cycling you have to set
123 ;; the variable `bs-cycle-configuration-name'. You can customize this variable.
124 ;;
125 ;; For example: If you use the configuration called "files-and-scratch" you
126 ;; can cycle through all file buffers and *scratch* although your current
127 ;; configuration perhaps is "files" which ignores buffer *scratch*.
129 ;;; History:
131 ;;; Code:
133 ;; ----------------------------------------------------------------------
134 ;; Globals for customization
135 ;; ----------------------------------------------------------------------
138 "Buffer Selection: Maintaining buffers by buffer menu."
145 "Buffer Selection appearance: Appearance of bs buffer menu."
160 "*List specifying the layout of a Buffer Selection Menu buffer.
161 Each entry specifies a column and is a list of the form of:
162 \(HEADER MINIMUM-LENGTH MAXIMUM-LENGTH ALIGNMENT FUN-OR-STRING)
163 HEADER : string for header for first line or a function
164 which calculates column title.
165 MINIMUM-LENGTH : minimum width of column (number or name of function).
166 The function must return a positive integer.
167 MAXIMUM-LENGTH : maximum width of column (number or name of function)
168 (currently ignored)
169 ALIGNMENT : alignment of column: (`left' `right' `middle')
170 FUN-OR-STRING : Name of a function for calculating the value or
171 a string for a constant value.
172 The function gets as parameter the buffer where we have started
173 buffer selection and the list of all buffers to show. The function must
174 return a string representing the column's value."
182 "Return a regexp matching the first line of a Buffer Selection Menu buffer."
190 ;; Font-Lock-Settings
195 ;; Buffername embedded by *
197 1
198 ;; problem in XEmacs with font-lock-constant-face
200 'font-lock-constant-face
202 ;; Dired-Buffers
204 ;; the star for modified buffers
209 "*Maximal window height of Buffer Selection Menu."
214 "Regular expression specifying which buffers not to show.
215 A buffer whose name matches this regular expression will not be
219 "Regular expression for specifying buffers which must be shown.
220 A buffer whose name matches this regular expression will be
221 included in the buffer list.
222 Note that this variable is temporary: if the configuration is changed
223 it is reset to nil. Use `bs-must-always-show-regexp' to specify buffers
227 "*Regular expression for specifying buffers to show always.
228 A buffer whose name matches this regular expression will
229 be shown regardless of current configuration of Buffer Selection Menu."
234 "Function for specifying buffers not to show.
235 The function gets one argument - the buffer to test. The function must
236 return a value different from nil to ignore the buffer in
240 "Function for specifying buffers which must be shown.
244 "Sort function to sort the buffers that appear in Buffer Selection Menu.
248 "*Maximum column width for buffer names.
249 The column for buffer names has dynamic width. The width depends on
250 maximal and minimal length of names of buffers to show. The maximal
251 width is bounded by `bs-maximal-buffer-name-column'.
252 See also `bs-minimal-buffer-name-column'."
257 "*Minimum column width for buffer names.
258 The column for buffer names has dynamic width. The width depends on
259 maximal and minimal length of names of buffers to show. The minimal
260 width is bounded by `bs-minimal-buffer-name-column'.
261 See also `bs-maximal-buffer-name-column'."
272 bs-sort-buffer-interns-are-last)
274 "*List of all configurations you can use in the Buffer Selection Menu.
275 A configuration describes which buffers appear in Buffer Selection Menu
276 and also the order of buffers. A configuration is a list with
277 six elements. The first element is a string and describes the configuration.
278 The following five elements represent the values for Buffer Selection Menu
279 configuration variables `bs-must-show-regexp', `bs-must-show-function',
280 `bs-dont-show-regexp', `bs-dont-show-function' and `bs-buffer-sort-function'.
281 By setting these variables you define a configuration."
286 "*Name of default configuration used by the Buffer Selection Menu.
289 Must be a string used in `bs-configurations' for naming a configuration."
294 "*Name of configuration used when calling `bs-show' with \
296 Must be a string used in `bs-configurations' for naming a configuration."
301 "Name of current configuration.
305 "*Name of configuration used when cycling through the buffer list.
306 A value of nil means to use current configuration `bs-default-configuration'.
307 Must be a string used in `bs-configurations' for naming a configuration."
310 string))
313 "*String added in column 1 indicating a buffer will always be shown."
318 "*String added in column 1 indicating a buffer will never be shown."
323 "*String added in column 1 indicating the current buffer."
328 "*String added in column 1 indicating the current buffer when it is marked."
333 "*String added in column 1 indicating a marked buffer."
338 "*String added in column 1 indicating a unmarked buffer."
343 "Maximum length of all displayed buffer names.
346 ;; ----------------------------------------------------------------------
347 ;; Internal globals
348 ;; ----------------------------------------------------------------------
351 "Flag for the current mode for showing this buffer.
352 A value of nil means buffer will be shown depending on the current
353 configuration.
354 A value of `never' means to never show the buffer.
359 ;; Make face named region (for XEmacs)
365 "Compare buffers B1 and B2 by buffer name."
370 "Compare buffers B1 and B2 by file name."
375 "Compare buffers B1 and B2 by mode name."
381 "Compare buffers B1 and B2 by buffer size."
392 "*List of all possible sorting aspects for Buffer Selection Menu.
393 You can add a new entry with a call to `bs-define-sort-function'.
394 Each element is a list of four elements (NAME FUNCTION REGEXP-FOR-SORTING FACE)
395 NAME specifies the sort order defined by function FUNCTION.
396 FUNCTION nil means don't sort the buffer list. Otherwise the functions
397 must have two parameters - the buffers to compare.
398 REGEXP-FOR-SORTING is a regular expression which describes the
399 column title to highlight.
400 FACE is a face used to fontify the sorted column title. A value of nil means
401 don't highlight."
406 "Define a new function for buffer sorting in Buffer Selection Menu.
407 NAME specifies the sort order defined by function FUN.
408 A value of nil for FUN means don't sort the buffer list. Otherwise the
409 functions must have two parameters - the buffers to compare.
410 REGEXP-FOR-SORTING is a regular expression which describes the
411 column title to highlight.
412 FACE is a face used to fontify the sorted column title. A value of nil means
413 don't highlight.
414 The new sort aspect will be inserted into list `bs-sort-functions'."
420 bs-sort-functions)))))
423 "Description of the current function for sorting the buffer list.
427 "*Name of default sort behavior.
441 "Flag whether showing all buffers regardless of current configuration.
442 Non nil means to show all buffers. Otherwise show buffers
449 "Regular expression specifying which buffers never to show.
450 A buffer whose name matches this regular expression will never be
454 "List of buffers shown in Buffer Selection Menu.
468 (define-key map "F" 'bs-select-other-frame)
469 (let ((key ?1))
470 (while (<= key ?9)
471 (define-key map (char-to-string key) 'digit-argument)
472 (setq key (1+ key))))
473 (define-key map "-" 'negative-argument)
474 (define-key map "\e-" 'negative-argument)
475 (define-key map "o" 'bs-select-other-window)
476 (define-key map "\C-o" 'bs-tmp-select-other-window)
477 ;; for GNU EMACS
478 (define-key map [mouse-3] 'bs-mouse-select-other-frame)
479 ;; for XEmacs
480 (define-key map [button3] 'bs-mouse-select-other-frame)
481 (define-key map [up] 'bs-up)
482 (define-key map "n" 'bs-down)
483 (define-key map "p" 'bs-up)
484 (define-key map [down] 'bs-down)
485 (define-key map "\C-m" 'bs-select)
486 (define-key map "b" 'bs-bury-buffer)
487 (define-key map "s" 'bs-save)
488 (define-key map "S" 'bs-show-sorted)
489 (define-key map "a" 'bs-toggle-show-all)
490 (define-key map "d" 'bs-delete)
491 (define-key map "\C-d" 'bs-delete-backward)
492 (define-key map "k" 'bs-delete)
493 (define-key map "g" 'bs-refresh)
494 (define-key map "C" 'bs-set-configuration-and-refresh)
495 (define-key map "c" 'bs-select-next-configuration)
496 (define-key map "q" 'bs-kill)
497 ;; (define-key map "z" 'bs-kill)
498 (define-key map "\C-c\C-c" 'bs-kill)
499 (define-key map "\C-g" 'bs-abort)
500 (define-key map "\C-]" 'bs-abort)
501 (define-key map "%" 'bs-toggle-readonly)
502 (define-key map "~" 'bs-clear-modified)
503 (define-key map "M" 'bs-toggle-current-to-show)
504 (define-key map "+" 'bs-set-current-buffer-to-show-always)
505 ;;(define-key map "-" 'bs-set-current-buffer-to-show-never)
506 (define-key map "t" 'bs-visit-tags-table)
507 (define-key map "m" 'bs-mark-current)
508 (define-key map "u" 'bs-unmark-current)
509 (define-key map ">" 'scroll-right)
510 (define-key map "<" 'scroll-left)
511 (define-key map "?" 'bs-help)
512 map)
513 "Keymap of `bs-mode'.")
515 ;; ----------------------------------------------------------------------
516 ;; Functions
517 ;; ----------------------------------------------------------------------
519 (defun bs-buffer-list (&optional list sort-description)
520 "Return a list of buffers to be shown.
521 LIST is a list of buffers to test for appearance in Buffer Selection Menu.
522 The result list depends on the global variables `bs-dont-show-regexp',
523 `bs-must-show-regexp', `bs-dont-show-function', `bs-must-show-function'
524 and `bs-buffer-sort-function'.
525 If SORT-DESCRIPTION isn't nil the list will be sorted by
526 a special function. SORT-DESCRIPTION is an element of `bs-sort-functions'."
527 (setq sort-description (or sort-description bs--current-sort-function)
528 list (or list (buffer-list)))
529 (let ((result nil))
530 (while list
531 (let* ((buffername (buffer-name (car list)))
532 (int-show-never (string-match bs--intern-show-never buffername))
533 (ext-show-never (and bs-dont-show-regexp
534 (string-match bs-dont-show-regexp
535 buffername)))
536 (extern-must-show (or (and bs-must-always-show-regexp
537 (string-match
538 bs-must-always-show-regexp
539 buffername))
540 (and bs-must-show-regexp
541 (string-match bs-must-show-regexp
542 buffername))))
543 (extern-show-never-from-fun (and bs-dont-show-function
544 (funcall bs-dont-show-function
545 (car list))))
546 (extern-must-show-from-fun (and bs-must-show-function
547 (funcall bs-must-show-function
548 (car list))))
549 (show-flag (buffer-local-value 'bs-buffer-show-mark (car list))))
550 (if (or (eq show-flag 'always)
551 (and (or bs--show-all (not (eq show-flag 'never)))
552 (not int-show-never)
553 (or bs--show-all
554 extern-must-show
555 extern-must-show-from-fun
556 (and (not ext-show-never)
557 (not extern-show-never-from-fun)))))
558 (setq result (cons (car list)
559 result)))
560 (setq list (cdr list))))
561 (setq result (reverse result))
562 ;; The current buffer which was the start point of bs should be an element
563 ;; of result list, so that we can leave with space and be back in the
564 ;; buffer we started bs-show.
565 (if (and bs--buffer-coming-from
566 (buffer-live-p bs--buffer-coming-from)
567 (not (memq bs--buffer-coming-from result)))
568 (setq result (cons bs--buffer-coming-from result)))
569 ;; sorting
570 (if (and sort-description
571 (nth 1 sort-description))
572 (setq result (sort result (nth 1 sort-description)))
573 ;; else standard sorting
574 (bs-buffer-sort result))))
576 (defun bs-buffer-sort (buffer-list)
577 "Sort buffers in BUFFER-LIST according to `bs-buffer-sort-function'."
578 (if bs-buffer-sort-function
579 (sort buffer-list bs-buffer-sort-function)
580 buffer-list))
582 (defun bs--redisplay (&optional keep-line-p sort-description)
583 "Redisplay whole Buffer Selection Menu.
584 If KEEP-LINE-P is non nil the point will stay on current line.
585 SORT-DESCRIPTION is an element of `bs-sort-functions'"
586 (let ((line (1+ (count-lines 1 (point)))))
587 (bs-show-in-buffer (bs-buffer-list nil sort-description))
588 (if keep-line-p
589 (goto-line line))
590 (beginning-of-line)))
592 (defun bs--goto-current-buffer ()
593 "Goto line which represents the current buffer;
594 actually the line which begins with character in `bs-string-current' or
595 `bs-string-current-marked'."
596 (let ((regexp (concat "^"
597 (regexp-quote bs-string-current)
599 (regexp-quote bs-string-current-marked)))
600 point)
601 (save-excursion
602 (goto-char (point-min))
603 (if (search-forward-regexp regexp nil t)
604 (setq point (- (point) 1))))
605 (if point
606 (goto-char point))))
608 (defun bs--current-config-message ()
609 "Return a string describing the current `bs-mode' configuration."
610 (if bs--show-all
611 "Show all buffers."
612 (format "Show buffer by configuration %S"
613 bs-current-configuration)))
615 (defun bs-mode ()
616 "Major mode for editing a subset of Emacs' buffers.
618 Aside from two header lines each line describes one buffer.
619 Move to a line representing the buffer you want to edit and select
621 There are many key commands similar to `Buffer-menu-mode' for
622 manipulating the buffer list and buffers.
623 For faster navigation each digit key is a digit argument.
629 remain in Buffer Selection Menu.
639 apply selected configuration.
641 available Buffer Selection Menu configuration.
645 to show always.
648 (interactive)
649 (kill-all-local-variables)
650 (use-local-map bs-mode-map)
651 (make-local-variable 'font-lock-defaults)
652 (make-local-variable 'font-lock-verbose)
653 (setq major-mode 'bs-mode
654 mode-name "Buffer-Selection-Menu"
655 buffer-read-only t
656 truncate-lines t
657 font-lock-defaults '(bs-mode-font-lock-keywords t)
658 font-lock-verbose nil)
659 (run-hooks 'bs-mode-hook))
661 (defun bs-kill ()
662 "Let buffer disappear and reset window-configuration."
663 (interactive)
664 (bury-buffer (current-buffer))
665 (set-window-configuration bs--window-config-coming-from))
667 (defun bs-abort ()
668 "Ding and leave Buffer Selection Menu without a selection."
669 (interactive)
670 (ding)
671 (bs-kill))
673 (defun bs-set-configuration-and-refresh ()
674 "Ask user for a configuration and apply selected configuration.
675 Refresh whole Buffer Selection Menu."
676 (interactive)
677 (call-interactively 'bs-set-configuration)
678 (bs--redisplay t))
680 (defun bs-refresh ()
681 "Refresh whole Buffer Selection Menu."
682 (interactive)
683 (bs--redisplay t))
685 (defun bs--window-for-buffer (buffer-name)
686 "Return a window showing a buffer with name BUFFER-NAME.
687 Take only windows of current frame into account.
688 Return nil if there is no such buffer."
689 (let ((window nil))
690 (walk-windows (lambda (wind)
691 (if (string= (buffer-name (window-buffer wind))
692 buffer-name)
693 (setq window wind))))
694 window))
696 (defun bs--set-window-height ()
697 "Change the height of the selected window to suit the current buffer list."
698 (unless (one-window-p t)
699 (shrink-window (- (window-height (selected-window))
700 ;; window-height in xemacs includes mode-line
701 (+ (if bs--running-in-xemacs 3 1)
702 bs-header-lines-length
703 (min (length bs-current-list)
704 bs-max-window-height))))))
706 (defun bs--current-buffer ()
707 "Return buffer on current line.
708 Raise an error if not on a buffer line."
709 (beginning-of-line)
710 (let ((line (+ (- bs-header-lines-length)
711 (count-lines 1 (point)))))
712 (if (< line 0)
713 (error "You are on a header row"))
714 (nth line bs-current-list)))
716 (defun bs--update-current-line ()
717 "Update the entry on current line for Buffer Selection Menu."
718 (let ((buffer (bs--current-buffer))
719 (inhibit-read-only t))
720 (beginning-of-line)
721 (delete-region (point) (line-end-position))
722 (bs--insert-one-entry buffer)
723 (beginning-of-line)))
725 (defun bs-view ()
726 "View current line's buffer in View mode.
727 Leave Buffer Selection Menu."
728 (interactive)
729 (view-buffer (bs--current-buffer)))
731 (defun bs-select ()
732 "Select current line's buffer and other marked buffers.
733 If there are no marked buffers the window configuration before starting
734 Buffer Selectin Menu will be restored.
735 If there are marked buffers each marked buffer and the current line's buffer
736 will be selected in a window.
737 Leave Buffer Selection Menu."
738 (interactive)
739 (let ((buffer (bs--current-buffer)))
740 (bury-buffer (current-buffer))
741 (set-window-configuration bs--window-config-coming-from)
742 (switch-to-buffer buffer)
743 (if bs--marked-buffers
744 ;; Some marked buffers for selection
745 (let* ((all (delq buffer bs--marked-buffers))
746 (height (/ (1- (frame-height)) (1+ (length all)))))
747 (delete-other-windows)
748 (switch-to-buffer buffer)
749 (while all
750 (split-window nil height)
751 (other-window 1)
752 (switch-to-buffer (car all))
753 (setq all (cdr all)))
754 ;; goto window we have started bs.
755 (other-window 1)))))
757 (defun bs-select-other-window ()
758 "Select current line's buffer by `switch-to-buffer-other-window'.
759 The window configuration before starting Buffer Selectin Menu will be restored
760 unless there is no other window. In this case a new window will be created.
761 Leave Buffer Selection Menu."
762 (interactive)
763 (let ((buffer (bs--current-buffer)))
764 (bury-buffer (current-buffer))
765 (set-window-configuration bs--window-config-coming-from)
766 (switch-to-buffer-other-window buffer)))
768 (defun bs-tmp-select-other-window ()
769 "Make the other window select this line's buffer.
770 The current window remains selected."
771 (interactive)
772 (let ((buffer (bs--current-buffer)))
773 (display-buffer buffer t)))
775 (defun bs-select-other-frame ()
776 "Select current line's buffer in new created frame.
777 Leave Buffer Selection Menu."
778 (interactive)
779 (let ((buffer (bs--current-buffer)))
780 (bury-buffer (current-buffer))
781 (set-window-configuration bs--window-config-coming-from)
782 (switch-to-buffer-other-frame buffer)))
784 (defun bs-mouse-select-other-frame (event)
785 "Select selected line's buffer in new created frame.
786 Leave Buffer Selection Menu.
787 EVENT: a mouse click EVENT."
788 (interactive "e")
789 (mouse-set-point event)
790 (bs-select-other-frame))
792 (defun bs-mouse-select (event)
793 "Select buffer on mouse click EVENT.
794 Select buffer by `bs-select'."
795 (interactive "e")
796 (mouse-set-point event)
797 (bs-select))
799 (defun bs-select-in-one-window ()
800 "Select current line's buffer in one window and delete other windows.
801 Leave Buffer Selection Menu."
802 (interactive)
803 (bs-select)
804 (delete-other-windows))
806 (defun bs-bury-buffer ()
807 "Bury buffer on current line."
808 (interactive)
809 (bury-buffer (bs--current-buffer))
810 (bs--redisplay t))
812 (defun bs-save ()
813 "Save buffer on current line."
814 (interactive)
815 (let ((buffer (bs--current-buffer)))
816 (save-excursion
817 (set-buffer buffer)
818 (save-buffer))
819 (bs--update-current-line)))
821 (defun bs-visit-tags-table ()
822 "Visit the tags table in the buffer on this line.
823 See `visit-tags-table'."
824 (interactive)
825 (let ((file (buffer-file-name (bs--current-buffer))))
826 (if file
827 (visit-tags-table file)
828 (error "Specified buffer has no file"))))
830 (defun bs-toggle-current-to-show ()
831 "Toggle status of showing flag for buffer in current line."
832 (interactive)
833 (let ((buffer (bs--current-buffer))
834 res)
835 (save-excursion
836 (set-buffer buffer)
837 (setq res (cond ((null bs-buffer-show-mark)
838 'never)
839 ((eq bs-buffer-show-mark 'never)
840 'always)
841 (t nil)))
842 (setq bs-buffer-show-mark res))
843 (bs--update-current-line)
844 (bs--set-window-height)
845 (bs--show-config-message res)))
847 (defun bs-set-current-buffer-to-show-always (&optional not-to-show-p)
848 "Toggle status of buffer on line to `always shown'.
849 NOT-TO-SHOW-P: prefix argument.
850 With no prefix argument the buffer on current line is marked to show
851 always. Otherwise it is marked to show never."
852 (interactive "P")
853 (if not-to-show-p
854 (bs-set-current-buffer-to-show-never)
855 (bs--set-toggle-to-show (bs--current-buffer) 'always)))
857 (defun bs-set-current-buffer-to-show-never ()
858 "Toggle status of buffer on line to `never shown'."
859 (interactive)
860 (bs--set-toggle-to-show (bs--current-buffer) 'never))
862 (defun bs--set-toggle-to-show (buffer what)
863 "Set value `bs-buffer-show-mark' of buffer BUFFER to WHAT.
864 Redisplay current line and display a message describing
865 the status of buffer on current line."
866 (with-current-buffer buffer (setq bs-buffer-show-mark what))
867 (bs--update-current-line)
868 (bs--set-window-height)
869 (bs--show-config-message what))
871 (defun bs-mark-current (count)
872 "Mark buffers.
873 COUNT is the number of buffers to mark.
874 Move cursor vertically down COUNT lines."
875 (interactive "p")
876 (let ((dir (if (> count 0) 1 -1))
877 (count (abs count)))
878 (while (> count 0)
879 (let ((buffer (bs--current-buffer)))
880 (if buffer
881 (setq bs--marked-buffers (cons buffer bs--marked-buffers)))
882 (bs--update-current-line)
883 (bs-down dir))
884 (setq count (1- count)))))
886 (defun bs-unmark-current (count)
887 "Unmark buffers.
888 COUNT is the number of buffers to unmark.
889 Move cursor vertically down COUNT lines."
890 (interactive "p")
891 (let ((dir (if (> count 0) 1 -1))
892 (count (abs count)))
893 (while (> count 0)
894 (let ((buffer (bs--current-buffer)))
895 (if buffer
896 (setq bs--marked-buffers (delq buffer bs--marked-buffers)))
897 (bs--update-current-line)
898 (bs-down dir))
899 (setq count (1- count)))))
901 (defun bs--show-config-message (what)
902 "Show message indicating the new showing status WHAT.
903 WHAT is a value of nil, `never', or `always'."
904 (bs-message-without-log (cond ((null what)
905 "Buffer will be shown normally.")
906 ((eq what 'never)
907 "Mark buffer to never be shown.")
908 (t "Mark buffer to show always."))))
910 (defun bs-delete ()
911 "Kill buffer on current line."
912 (interactive)
913 (let ((current (bs--current-buffer))
914 (inhibit-read-only t))
915 (unless (kill-buffer current)
916 (error "Buffer was not deleted"))
917 (setq bs-current-list (delq current bs-current-list))
918 (beginning-of-line)
919 (delete-region (point) (save-excursion
920 (end-of-line)
921 (if (eobp) (point) (1+ (point)))))
922 (if (eobp)
923 (progn
924 (backward-delete-char 1)
925 (beginning-of-line)
926 (recenter -1)))
927 (bs--set-window-height)))
929 (defun bs-delete-backward ()
930 "Like `bs-delete' but go to buffer in front of current."
931 (interactive)
932 (let ((on-last-line-p (save-excursion (end-of-line) (eobp))))
933 (bs-delete)
934 (unless on-last-line-p
935 (bs-up 1))))
937 (defun bs-show-sorted ()
938 "Show buffer list sorted by buffer name."
939 (interactive)
940 (setq bs--current-sort-function
941 (bs-next-config-aux (car bs--current-sort-function)
942 bs-sort-functions))
943 (bs--redisplay)
944 (bs--goto-current-buffer)
945 (bs-message-without-log "Sorted %s" (car bs--current-sort-function)))
947 (defun bs-apply-sort-faces (&optional sort-description)
948 "Set text properties for the sort described by SORT-DESCRIPTION.
949 SORT-DESCRIPTION is an element of `bs-sort-functions'.
950 Default is `bs--current-sort-function'."
951 (let ((sort-description (or sort-description
952 bs--current-sort-function)))
953 (save-excursion
954 (goto-char (point-min))
955 (if (and (nth 2 sort-description)
956 (search-forward-regexp (nth 2 sort-description) nil t))
957 (let ((inhibit-read-only t))
958 (put-text-property (match-beginning 0)
959 (match-end 0)
960 'face
961 (or (nth 3 sort-description)
962 'region)))))))
964 (defun bs-toggle-show-all ()
965 "Toggle show all buffers / show buffers with current configuration."
966 (interactive)
967 (setq bs--show-all (not bs--show-all))
968 (bs--redisplay)
969 (bs--goto-current-buffer)
970 (bs-message-without-log "%s" (bs--current-config-message)))
972 (defun bs-toggle-readonly ()
973 "Toggle read-only status for buffer on current line.
974 Uses function `vc-toggle-read-only'."
975 (interactive)
976 (let ((buffer (bs--current-buffer)))
977 (save-excursion
978 (set-buffer buffer)
979 (vc-toggle-read-only))
980 (bs--update-current-line)))
982 (defun bs-clear-modified ()
983 "Set modified flag for buffer on current line to nil."
984 (interactive)
985 (let ((buffer (bs--current-buffer)))
986 (save-excursion
987 (set-buffer buffer)
988 (set-buffer-modified-p nil)))
989 (bs--update-current-line))
991 (defun bs--nth-wrapper (count fun &rest args)
992 "Call COUNT times function FUN with arguments ARGS."
993 (setq count (or count 1))
994 (while (> count 0)
995 (apply fun args)
996 (setq count (1- count))))
998 (defun bs-up (arg)
999 "Move cursor vertically up ARG lines in Buffer Selection Menu."
1000 (interactive "p")
1001 (if (and arg (numberp arg) (< arg 0))
1002 (bs--nth-wrapper (- arg) 'bs--down)
1003 (bs--nth-wrapper arg 'bs--up)))
1005 (defun bs--up ()
1006 "Move cursor vertically up one line.
1007 If on top of buffer list go to last line."
1008 (interactive "p")
1009 (previous-line 1)
1010 (if (<= (count-lines 1 (point)) (1- bs-header-lines-length))
1011 (progn
1012 (goto-char (point-max))
1013 (beginning-of-line)
1014 (recenter -1))
1015 (beginning-of-line)))
1017 (defun bs-down (arg)
1018 "Move cursor vertically down ARG lines in Buffer Selection Menu."
1019 (interactive "p")
1020 (if (and arg (numberp arg) (< arg 0))
1021 (bs--nth-wrapper (- arg) 'bs--up)
1022 (bs--nth-wrapper arg 'bs--down)))
1024 (defun bs--down ()
1025 "Move cursor vertically down one line.
1026 If at end of buffer list go to first line."
1027 (let ((last (line-end-position)))
1028 (if (eq last (point-max))
1029 (goto-line (1+ bs-header-lines-length))
1030 (next-line 1))))
1032 (defun bs-visits-non-file (buffer)
1033 "Return t or nil whether BUFFER visits no file.
1034 A value of t means BUFFER belongs to no file.
1035 A value of nil means BUFFER belongs to a file."
1036 (not (buffer-file-name buffer)))
1038 (defun bs-sort-buffer-interns-are-last (b1 b2)
1039 "Function for sorting internal buffers B1 and B2 at the end of all buffers."
1042 ;; ----------------------------------------------------------------------
1043 ;; Configurations:
1044 ;; ----------------------------------------------------------------------
1046 (defun bs-config-clear ()
1047 "*Reset all variables which specify a configuration.
1048 These variables are `bs-dont-show-regexp', `bs-must-show-regexp',
1049 `bs-dont-show-function', `bs-must-show-function' and
1050 `bs-buffer-sort-function'."
1051 (setq bs-dont-show-regexp nil
1052 bs-must-show-regexp nil
1053 bs-dont-show-function nil
1054 bs-must-show-function nil
1055 bs-buffer-sort-function nil))
1057 (defun bs-config--only-files ()
1058 "Define a configuration for showing only buffers visiting a file."
1059 (bs-config-clear)
1060 (setq ;; I want to see *-buffers at the end
1061 bs-buffer-sort-function 'bs-sort-buffer-interns-are-last
1062 ;; Don't show files who don't belong to a file
1063 bs-dont-show-function 'bs-visits-non-file))
1065 (defun bs-config--files-and-scratch ()
1066 "Define a configuration for showing buffer *scratch* and file buffers."
1067 (bs-config-clear)
1068 (setq ;; I want to see *-buffers at the end
1069 bs-buffer-sort-function 'bs-sort-buffer-interns-are-last
1070 ;; Don't show files who don't belong to a file
1071 bs-dont-show-function 'bs-visits-non-file
1072 ;; Show *scratch* buffer.
1075 (defun bs-config--all ()
1076 "Define a configuration for showing all buffers.
1077 Reset all according variables by `bs-config-clear'."
1078 (bs-config-clear))
1080 (defun bs-config--all-intern-last ()
1081 "Define a configuration for showing all buffers.
1082 Internal buffers appear at end of all buffers."
1083 (bs-config-clear)
1084 ;; I want to see *-buffers at the end
1085 (setq bs-buffer-sort-function 'bs-sort-buffer-interns-are-last))
1087 (defun bs-set-configuration (name)
1088 "Set configuration to the one saved under string NAME in `bs-configurations'.
1089 When called interactively ask user for a configuration and apply selected
1090 configuration."
1091 (interactive (list (completing-read "Use configuration: "
1092 bs-configurations
1093 nil
1094 t)))
1095 (let ((list (assoc name bs-configurations)))
1096 (if list
1097 (if (listp list)
1098 (setq bs-current-configuration name
1099 bs-must-show-regexp (nth 1 list)
1100 bs-must-show-function (nth 2 list)
1101 bs-dont-show-regexp (nth 3 list)
1102 bs-dont-show-function (nth 4 list)
1103 bs-buffer-sort-function (nth 5 list))
1104 ;; for backward compability
1105 (funcall (cdr list)))
1106 ;; else
1107 (ding)
1108 (bs-message-without-log "No bs-configuration named %S." name))))
1110 (defun bs-help ()
1111 "Help for `bs-show'."
1112 (interactive)
1113 (describe-function 'bs-mode))
1115 (defun bs-next-config-aux (start-name list)
1116 "Get the next assoc after START-NAME in list LIST.
1117 Will return the first if START-NAME is at end."
1118 (let ((assocs list)
1119 (length (length list))
1120 pos)
1121 (while (and assocs (not pos))
1122 (if (string= (car (car assocs)) start-name)
1123 (setq pos (- length (length assocs))))
1124 (setq assocs (cdr assocs)))
1125 (setq pos (1+ pos))
1126 (if (eq pos length)
1127 (car list)
1128 (nth pos list))))
1130 (defun bs-next-config (name)
1131 "Return next configuration with respect to configuration with name NAME."
1132 (bs-next-config-aux name bs-configurations))
1134 (defun bs-select-next-configuration (&optional start-name)
1135 "Apply next configuration START-NAME and refresh buffer list.
1136 If START-NAME is nil the current configuration `bs-current-configuration'
1137 will be used."
1138 (interactive)
1139 (let ((config (bs-next-config (or start-name bs-current-configuration))))
1140 (bs-set-configuration (car config))
1141 (setq bs-default-configuration bs-current-configuration)
1142 (bs--redisplay t)
1143 (bs--set-window-height)
1144 (bs-message-without-log "Selected configuration: %s" (car config))))
1146 (defun bs-show-in-buffer (list)
1147 "Display buffer list LIST in buffer *buffer-selection*.
1148 Select buffer *buffer-selection* and display buffers according to current
1149 configuration `bs-current-configuration'. Set window height, fontify buffer
1150 and move point to current buffer."
1151 (setq bs-current-list list)
1152 (switch-to-buffer (get-buffer-create "*buffer-selection*"))
1153 (bs-mode)
1154 (let* ((inhibit-read-only t)
1155 (map-fun (lambda (entry)
1156 (length (buffer-name entry))))
1157 (max-length-of-names (apply 'max
1158 (cons 0 (mapcar map-fun list))))
1159 (name-entry-length (min bs-maximal-buffer-name-column
1160 (max bs-minimal-buffer-name-column
1161 max-length-of-names))))
1162 (erase-buffer)
1163 (setq bs--name-entry-length name-entry-length)
1164 (bs--show-header)
1165 (while list
1166 (bs--insert-one-entry (car list))
1168 (setq list (cdr list)))
1169 (delete-backward-char 1)
1170 (bs--set-window-height)
1171 (bs--goto-current-buffer)
1172 (font-lock-fontify-buffer)
1173 (bs-apply-sort-faces)))
1175 (defun bs-next-buffer (&optional buffer-list sorting-p)
1176 "Return next buffer and buffer list for buffer cycling in BUFFER-LIST.
1177 Ignore sorting when SORTING-P is nil.
1178 If BUFFER-LIST is nil the result of `bs-buffer-list' will be used as
1179 buffer list. The result is a cons of normally the second element of
1180 BUFFER-LIST and the buffer list used for buffer cycling."
1181 (let* ((bs--current-sort-function (if sorting-p
1182 bs--current-sort-function))
1183 (bs-buffer-list (or buffer-list (bs-buffer-list))))
1184 (cons (or (car (cdr bs-buffer-list))
1185 (car bs-buffer-list)
1186 (current-buffer))
1187 bs-buffer-list)))
1189 (defun bs-previous-buffer (&optional buffer-list sorting-p)
1190 "Return previous buffer and buffer list for buffer cycling in BUFFER-LIST.
1191 Ignore sorting when SORTING-P is nil.
1192 If BUFFER-LIST is nil the result of `bs-buffer-list' will be used as
1193 buffer list. The result is a cons of last element of BUFFER-LIST and the
1194 buffer list used for buffer cycling."
1195 (let* ((bs--current-sort-function (if sorting-p
1196 bs--current-sort-function))
1197 (bs-buffer-list (or buffer-list (bs-buffer-list))))
1198 (cons (or (car (last bs-buffer-list))
1199 (current-buffer))
1200 bs-buffer-list)))
1202 (defun bs-message-without-log (&rest args)
1203 "Like `message' but don't log it on the message log.
1204 All arguments ARGS are transferred to function `message'."
1205 (let ((message-log-max nil))
1206 (apply 'message args)))
1208 (defvar bs--cycle-list nil
1209 "Current buffer list used for cycling.")
1211 ;;;###autoload
1212 (defun bs-cycle-next ()
1213 "Select next buffer defined by buffer cycling.
1214 The buffers taking part in buffer cycling are defined
1215 by buffer configuration `bs-cycle-configuration-name'."
1216 (interactive)
1217 (let ((bs--buffer-coming-from (current-buffer))
1218 (bs-dont-show-regexp bs-dont-show-regexp)
1219 (bs-must-show-regexp bs-must-show-regexp)
1220 (bs-dont-show-function bs-dont-show-function)
1221 (bs-must-show-function bs-must-show-function)
1222 (bs--show-all nil))
1223 (bs-set-configuration (or bs-cycle-configuration-name bs-default-configuration))
1224 (let ((bs-buffer-sort-function nil)
1225 (bs--current-sort-function nil))
1226 (let* ((tupel (bs-next-buffer (if (or (eq last-command
1227 'bs-cycle-next)
1228 (eq last-command
1229 'bs-cycle-previous))
1230 bs--cycle-list)))
1231 (next (car tupel))
1232 (cycle-list (cdr tupel)))
1233 (setq bs--cycle-list (append (cdr cycle-list)
1234 (list (car cycle-list))))
1235 (bury-buffer)
1236 (switch-to-buffer next)
1237 (bs-message-without-log "Next buffers: %s"
1238 (or (cdr bs--cycle-list)
1239 "this buffer"))))))
1242 ;;;###autoload
1243 (defun bs-cycle-previous ()
1244 "Select previous buffer defined by buffer cycling.
1245 The buffers taking part in buffer cycling are defined
1246 by buffer configuration `bs-cycle-configuration-name'."
1247 (interactive)
1248 (let ((bs--buffer-coming-from (current-buffer))
1249 (bs-dont-show-regexp bs-dont-show-regexp)
1250 (bs-must-show-regexp bs-must-show-regexp)
1251 (bs-dont-show-function bs-dont-show-function)
1252 (bs-must-show-function bs-must-show-function)
1253 (bs--show-all nil))
1254 (bs-set-configuration (or bs-cycle-configuration-name bs-default-configuration))
1255 (let ((bs-buffer-sort-function nil)
1256 (bs--current-sort-function nil))
1257 (let* ((tupel (bs-previous-buffer (if (or (eq last-command
1258 'bs-cycle-next)
1259 (eq last-command
1260 'bs-cycle-previous))
1261 bs--cycle-list)))
1262 (prev-buffer (car tupel))
1263 (cycle-list (cdr tupel)))
1264 (setq bs--cycle-list (append (last cycle-list)
1265 (reverse (cdr (reverse cycle-list)))))
1266 (switch-to-buffer prev-buffer)
1267 (bs-message-without-log "Previous buffers: %s"
1268 (or (reverse (cdr bs--cycle-list))
1269 "this buffer"))))))
1271 (defun bs--get-value (fun &optional args)
1272 "Apply function FUN with arguments ARGS.
1273 Return result of evaluation. Will return FUN if FUN is a number
1274 or a string."
1275 (cond ((numberp fun)
1276 fun)
1277 ((stringp fun)
1278 fun)
1279 (t (apply fun args))))
1281 (defun bs--get-marked-string (start-buffer all-buffers)
1282 "Return a string which describes whether current buffer is marked.
1283 START-BUFFER is the buffer where we started buffer selection.
1284 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu.
1285 The result string is one of `bs-string-current', `bs-string-current-marked',
1286 `bs-string-marked', `bs-string-show-normally', `bs-string-show-never', or
1287 `bs-string-show-always'."
1288 (cond ;; current buffer is the buffer we started buffer selection.
1289 ((eq (current-buffer) start-buffer)
1290 (if (memq (current-buffer) bs--marked-buffers)
1291 bs-string-current-marked ; buffer is marked
1292 bs-string-current))
1293 ;; current buffer is marked
1294 ((memq (current-buffer) bs--marked-buffers)
1295 bs-string-marked)
1296 ;; current buffer hasn't a special mark.
1297 ((null bs-buffer-show-mark)
1298 bs-string-show-normally)
1299 ;; current buffer has a mark not to show itself.
1300 ((eq bs-buffer-show-mark 'never)
1301 bs-string-show-never)
1302 ;; otherwise current buffer is marked to show always.
1303 (t
1304 bs-string-show-always)))
1306 (defun bs--get-modified-string (start-buffer all-buffers)
1307 "Return a string which describes whether current buffer is modified.
1308 START-BUFFER is the buffer where we started buffer selection.
1309 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu."
1310 (if (buffer-modified-p) "*" " "))
1312 (defun bs--get-readonly-string (start-buffer all-buffers)
1313 "Return a string which describes whether current buffer is read only.
1314 START-BUFFER is the buffer where we started buffer selection.
1315 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu."
1316 (if buffer-read-only "%" " "))
1318 (defun bs--get-size-string (start-buffer all-buffers)
1319 "Return a string which describes the size of current buffer.
1320 START-BUFFER is the buffer where we started buffer selection.
1321 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu."
1322 (int-to-string (buffer-size)))
1324 (defun bs--get-name (start-buffer all-buffers)
1325 "Return name of current buffer for Buffer Selection Menu.
1326 The name of current buffer gets additional text properties
1327 for mouse highlighting.
1328 START-BUFFER is the buffer where we started buffer selection.
1329 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu."
1330 (let ((name (copy-sequence (buffer-name))))
1331 (add-text-properties
1332 0 (length name)
1333 '(mouse-face highlight
1334 help-echo
1335 "mouse-2: select this buffer, mouse-3: select in other frame")
1336 name)
1337 (if (< (length name) bs--name-entry-length)
1338 (concat name
1339 (make-string (- bs--name-entry-length (length name)) ? ))
1340 name)))
1342 (defun bs--get-mode-name (start-buffer all-buffers)
1343 "Return the name of mode of current buffer for Buffer Selection Menu.
1344 START-BUFFER is the buffer where we started buffer selection.
1345 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu."
1346 mode-name)
1348 (defun bs--get-file-name (start-buffer all-buffers)
1349 "Return string for column 'File' in Buffer Selection Menu.
1350 This is the variable `buffer-file-name' of current buffer.
1351 If current mode is `dired-mode' or `shell-mode' it returns the
1352 default directory.
1353 START-BUFFER is the buffer where we started buffer selection.
1354 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu."
1355 (let ((string (copy-sequence (if (member major-mode
1356 '(shell-mode dired-mode))
1357 default-directory
1358 (or buffer-file-name "")))))
1359 (add-text-properties
1360 0 (length string)
1361 '(mouse-face highlight
1362 help-echo "mouse-2: select this buffer, mouse-3: select in other frame")
1363 string)
1364 string))
1366 (defun bs--insert-one-entry (buffer)
1367 "Generate one entry for buffer BUFFER in Buffer Selection Menu.
1368 It goes over all columns described in `bs-attributes-list'
1369 and evaluates corresponding string. Inserts string in current buffer;
1370 normally *buffer-selection*."
1371 (let ((string "")
1372 (columns bs-attributes-list)
1373 (to-much 0)
1374 (apply-args (append (list bs--buffer-coming-from bs-current-list))))
1375 (save-excursion
1376 (while columns
1377 (set-buffer buffer)
1378 (let ((min (bs--get-value (nth 1 (car columns))))
1379 ;;(max (bs--get-value (nth 2 (car columns)))) refered no more
1380 (align (nth 3 (car columns)))
1381 (fun (nth 4 (car columns)))
1382 (val nil)
1383 new-string)
1384 (setq val (bs--get-value fun apply-args))
1385 (setq new-string (bs--format-aux val align (- min to-much)))
1386 (setq string (concat string new-string))
1387 (if (> (length new-string) min)
1388 (setq to-much (- (length new-string) min)))
1389 ) ; let
1390 (setq columns (cdr columns))))
1391 (insert string)
1392 string))
1394 (defun bs--format-aux (string align len)
1395 "Generate a string with STRING with alignment ALIGN and length LEN.
1396 ALIGN is one of the symbols `left', `middle', or `right'."
1397 (let ((length (length string)))
1398 (if (>= length len)
1399 string
1400 (if (eq 'right align)
1401 (concat (make-string (- len length) ? ) string)
1402 (concat string (make-string (- len length) ? ))))))
1404 (defun bs--show-header ()
1405 "Insert header for Buffer Selection Menu in current buffer."
1406 (mapcar '(lambda (string)
1408 (bs--create-header)))
1410 (defun bs--get-name-length ()
1411 "Return value of `bs--name-entry-length'."
1412 bs--name-entry-length)
1414 (defun bs--create-header ()
1415 "Return all header lines used in Buffer Selection Menu as a list of strings."
1416 (list (mapconcat (lambda (column)
1417 (bs--format-aux (bs--get-value (car column))
1418 (nth 3 column) ; align
1419 (bs--get-value (nth 1 column))))
1420 bs-attributes-list
1421 "")
1422 (mapconcat (lambda (column)
1423 (let ((length (length (bs--get-value (car column)))))
1424 (bs--format-aux (make-string length ?-)
1425 (nth 3 column) ; align
1426 (bs--get-value (nth 1 column)))))
1427 bs-attributes-list
1428 "")))
1430 (defun bs--show-with-configuration (name &optional arg)
1431 "Display buffer list of configuration with name NAME.
1432 Set configuration NAME and determine window for Buffer Selection Menu.
1433 Unless current buffer is buffer *buffer-selection* we have to save
1434 the buffer we started Buffer Selection Menu and the current window
1435 configuration to restore buffer and window configuration after a
1436 selection. If there is already a window displaying *buffer-selection*
1437 select this window for Buffer Selection Menu. Otherwise open a new
1438 window.
1439 The optional argument ARG is the prefix argument when calling a function
1440 for buffer selection."
1441 (bs-set-configuration name)
1442 (let ((bs--show-all (or bs--show-all arg)))
1443 (unless (string= "*buffer-selection*" (buffer-name))
1444 ;; Only when not in buffer *buffer-selection*
1445 ;; we have to set the buffer we started the command
1446 (progn
1447 (setq bs--buffer-coming-from (current-buffer))
1448 (setq bs--window-config-coming-from (current-window-configuration))))
1449 (let ((liste (bs-buffer-list))
1450 (active-window (bs--window-for-buffer "*buffer-selection*")))
1451 (if active-window
1452 (select-window active-window)
1453 (if (> (window-height (selected-window)) 7)
1454 (progn
1455 (split-window-vertically)
1456 (other-window 1))))
1457 (bs-show-in-buffer liste)
1458 (bs-message-without-log "%s" (bs--current-config-message)))))
1460 (defun bs--configuration-name-for-prefix-arg (prefix-arg)
1461 "Convert prefix argument PREFIX-ARG to a name of a buffer configuration.
1462 If PREFIX-ARG is nil return `bs-default-configuration'.
1463 If PREFIX-ARG is an integer return PREFIX-ARG element of `bs-configurations'.
1464 Otherwise return `bs-alternative-configuration'."
1465 (cond ;; usually activation
1466 ((null prefix-arg)
1467 bs-default-configuration)
1468 ;; call with integer as prefix argument
1469 ((integerp prefix-arg)
1470 (if (and (< 0 prefix-arg) (<= prefix-arg (length bs-configurations)))
1471 (car (nth (1- prefix-arg) bs-configurations))
1472 bs-default-configuration))
1473 ;; call by prefix argument C-u
1474 (t bs-alternative-configuration)))
1476 ;; ----------------------------------------------------------------------
1477 ;; Main function bs-customize and bs-show
1478 ;; ----------------------------------------------------------------------
1480 ;;;###autoload
1481 (defun bs-customize ()
1482 "Customization of group bs for Buffer Selection Menu."
1483 (interactive)
1484 (customize-group "bs"))
1486 ;;;###autoload
1487 (defun bs-show (arg)
1488 "Make a menu of buffers so you can manipulate buffers or the buffer list.
1490 There are many key commands similar to `Buffer-menu-mode' for
1491 manipulating buffer list and buffers itself.
1492 User can move with [up] or [down], select a buffer
1496 With prefix argument ARG show a different buffer list. Function
1497 `bs--configuration-name-for-prefix-arg' determine accordingly
1498 name of buffer configuration."
1499 (interactive "P")
1500 (setq bs--marked-buffers nil)
1501 (bs--show-with-configuration (bs--configuration-name-for-prefix-arg arg)))
1503 ;; Now provide feature bs
1504 (provide 'bs)
1506 ;;; arch-tag: c0d9ab34-bf06-4368-ae9d-af88878e6802
1507 ;;; bs.el ends here