| blob | 9fdc8922cc2bbe379709d4ba50a9d6220207a592 |
1 ;;; bs.el --- menu for selecting and displaying buffers
3 ;; Copyright (C) 1998, 1999, 2000, 2001 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 (save-excursion
550 (set-buffer (car list))
551 bs-buffer-show-mark)))
552 (if (or (eq show-flag 'always)
553 (and (or bs--show-all (not (eq show-flag 'never)))
554 (not int-show-never)
555 (or bs--show-all
556 extern-must-show
557 extern-must-show-from-fun
558 (and (not ext-show-never)
559 (not extern-show-never-from-fun)))))
560 (setq result (cons (car list)
561 result)))
562 (setq list (cdr list))))
563 (setq result (reverse result))
564 ;; The current buffer which was the start point of bs should be an element
565 ;; of result list, so that we can leave with space and be back in the
566 ;; buffer we started bs-show.
567 (if (and bs--buffer-coming-from
568 (buffer-live-p bs--buffer-coming-from)
569 (not (memq bs--buffer-coming-from result)))
570 (setq result (cons bs--buffer-coming-from result)))
571 ;; sorting
572 (if (and sort-description
573 (nth 1 sort-description))
574 (setq result (sort result (nth 1 sort-description)))
575 ;; else standard sorting
576 (bs-buffer-sort result))))
578 (defun bs-buffer-sort (buffer-list)
579 "Sort buffers in BUFFER-LIST according to `bs-buffer-sort-function'."
580 (if bs-buffer-sort-function
581 (sort buffer-list bs-buffer-sort-function)
582 buffer-list))
584 (defun bs--redisplay (&optional keep-line-p sort-description)
585 "Redisplay whole Buffer Selection Menu.
586 If KEEP-LINE-P is non nil the point will stay on current line.
587 SORT-DESCRIPTION is an element of `bs-sort-functions'"
588 (let ((line (1+ (count-lines 1 (point)))))
589 (bs-show-in-buffer (bs-buffer-list nil sort-description))
590 (if keep-line-p
591 (goto-line line))
592 (beginning-of-line)))
594 (defun bs--goto-current-buffer ()
595 "Goto line which represents the current buffer;
596 actually the line which begins with character in `bs-string-current' or
597 `bs-string-current-marked'."
598 (let ((regexp (concat "^"
599 (regexp-quote bs-string-current)
601 (regexp-quote bs-string-current-marked)))
602 point)
603 (save-excursion
604 (goto-char (point-min))
605 (if (search-forward-regexp regexp nil t)
606 (setq point (- (point) 1))))
607 (if point
608 (goto-char point))))
610 (defun bs--current-config-message ()
611 "Return a string describing the current `bs-mode' configuration."
612 (if bs--show-all
613 "Show all buffers."
614 (format "Show buffer by configuration %S"
615 bs-current-configuration)))
617 (defun bs-mode ()
618 "Major mode for editing a subset of Emacs' buffers.
620 Aside from two header lines each line describes one buffer.
621 Move to a line representing the buffer you want to edit and select
623 There are many key commands similar to `Buffer-menu-mode' for
624 manipulating the buffer list and buffers.
625 For faster navigation each digit key is a digit argument.
631 remain in Buffer Selection Menu.
641 apply selected configuration.
643 available Buffer Selection Menu configuration.
647 to show always.
650 (interactive)
651 (kill-all-local-variables)
652 (use-local-map bs-mode-map)
653 (make-local-variable 'font-lock-defaults)
654 (make-local-variable 'font-lock-verbose)
655 (setq major-mode 'bs-mode
656 mode-name "Buffer-Selection-Menu"
657 buffer-read-only t
658 truncate-lines t
659 font-lock-defaults '(bs-mode-font-lock-keywords t)
660 font-lock-verbose nil)
661 (run-hooks 'bs-mode-hook))
663 (defun bs-kill ()
664 "Let buffer disappear and reset window-configuration."
665 (interactive)
666 (bury-buffer (current-buffer))
667 (set-window-configuration bs--window-config-coming-from))
669 (defun bs-abort ()
670 "Ding and leave Buffer Selection Menu without a selection."
671 (interactive)
672 (ding)
673 (bs-kill))
675 (defun bs-set-configuration-and-refresh ()
676 "Ask user for a configuration and apply selected configuration.
677 Refresh whole Buffer Selection Menu."
678 (interactive)
679 (call-interactively 'bs-set-configuration)
680 (bs--redisplay t))
682 (defun bs-refresh ()
683 "Refresh whole Buffer Selection Menu."
684 (interactive)
685 (bs--redisplay t))
687 (defun bs--window-for-buffer (buffer-name)
688 "Return a window showing a buffer with name BUFFER-NAME.
689 Take only windows of current frame into account.
690 Return nil if there is no such buffer."
691 (let ((window nil))
692 (walk-windows (lambda (wind)
693 (if (string= (buffer-name (window-buffer wind))
694 buffer-name)
695 (setq window wind))))
696 window))
698 (defun bs--set-window-height ()
699 "Change the height of the selected window to suit the current buffer list."
700 (unless (one-window-p t)
701 (shrink-window (- (window-height (selected-window))
702 ;; window-height in xemacs includes mode-line
703 (+ (if bs--running-in-xemacs 3 1)
704 bs-header-lines-length
705 (min (length bs-current-list)
706 bs-max-window-height))))))
708 (defun bs--current-buffer ()
709 "Return buffer on current line.
710 Raise an error if not on a buffer line."
711 (beginning-of-line)
712 (let ((line (+ (- bs-header-lines-length)
713 (count-lines 1 (point)))))
714 (if (< line 0)
715 (error "You are on a header row"))
716 (nth line bs-current-list)))
718 (defun bs--update-current-line ()
719 "Update the entry on current line for Buffer Selection Menu."
720 (let ((buffer (bs--current-buffer))
721 (inhibit-read-only t))
722 (beginning-of-line)
723 (delete-region (point) (line-end-position))
724 (bs--insert-one-entry buffer)
725 (beginning-of-line)))
727 (defun bs-view ()
728 "View current line's buffer in View mode.
729 Leave Buffer Selection Menu."
730 (interactive)
731 (view-buffer (bs--current-buffer)))
733 (defun bs-select ()
734 "Select current line's buffer and other marked buffers.
735 If there are no marked buffers the window configuration before starting
736 Buffer Selectin Menu will be restored.
737 If there are marked buffers each marked buffer and the current line's buffer
738 will be selected in a window.
739 Leave Buffer Selection Menu."
740 (interactive)
741 (let ((buffer (bs--current-buffer)))
742 (bury-buffer (current-buffer))
743 (set-window-configuration bs--window-config-coming-from)
744 (switch-to-buffer buffer)
745 (if bs--marked-buffers
746 ;; Some marked buffers for selection
747 (let* ((all (delq buffer bs--marked-buffers))
748 (height (/ (1- (frame-height)) (1+ (length all)))))
749 (delete-other-windows)
750 (switch-to-buffer buffer)
751 (while all
752 (split-window nil height)
753 (other-window 1)
754 (switch-to-buffer (car all))
755 (setq all (cdr all)))
756 ;; goto window we have started bs.
757 (other-window 1)))))
759 (defun bs-select-other-window ()
760 "Select current line's buffer by `switch-to-buffer-other-window'.
761 The window configuration before starting Buffer Selectin Menu will be restored
762 unless there is no other window. In this case a new window will be created.
763 Leave Buffer Selection Menu."
764 (interactive)
765 (let ((buffer (bs--current-buffer)))
766 (bury-buffer (current-buffer))
767 (set-window-configuration bs--window-config-coming-from)
768 (switch-to-buffer-other-window buffer)))
770 (defun bs-tmp-select-other-window ()
771 "Make the other window select this line's buffer.
772 The current window remains selected."
773 (interactive)
774 (let ((buffer (bs--current-buffer)))
775 (display-buffer buffer t)))
777 (defun bs-select-other-frame ()
778 "Select current line's buffer in new created frame.
779 Leave Buffer Selection Menu."
780 (interactive)
781 (let ((buffer (bs--current-buffer)))
782 (bury-buffer (current-buffer))
783 (set-window-configuration bs--window-config-coming-from)
784 (switch-to-buffer-other-frame buffer)))
786 (defun bs-mouse-select-other-frame (event)
787 "Select selected line's buffer in new created frame.
788 Leave Buffer Selection Menu.
789 EVENT: a mouse click EVENT."
790 (interactive "e")
791 (mouse-set-point event)
792 (bs-select-other-frame))
794 (defun bs-mouse-select (event)
795 "Select buffer on mouse click EVENT.
796 Select buffer by `bs-select'."
797 (interactive "e")
798 (mouse-set-point event)
799 (bs-select))
801 (defun bs-select-in-one-window ()
802 "Select current line's buffer in one window and delete other windows.
803 Leave Buffer Selection Menu."
804 (interactive)
805 (bs-select)
806 (delete-other-windows))
808 (defun bs-bury-buffer ()
809 "Bury buffer on current line."
810 (interactive)
811 (bury-buffer (bs--current-buffer))
812 (bs--redisplay t))
814 (defun bs-save ()
815 "Save buffer on current line."
816 (interactive)
817 (let ((buffer (bs--current-buffer)))
818 (save-excursion
819 (set-buffer buffer)
820 (save-buffer))
821 (bs--update-current-line)))
823 (defun bs-visit-tags-table ()
824 "Visit the tags table in the buffer on this line.
825 See `visit-tags-table'."
826 (interactive)
827 (let ((file (buffer-file-name (bs--current-buffer))))
828 (if file
829 (visit-tags-table file)
830 (error "Specified buffer has no file"))))
832 (defun bs-toggle-current-to-show ()
833 "Toggle status of showing flag for buffer in current line."
834 (interactive)
835 (let ((buffer (bs--current-buffer))
836 res)
837 (save-excursion
838 (set-buffer buffer)
839 (setq res (cond ((null bs-buffer-show-mark)
840 'never)
841 ((eq bs-buffer-show-mark 'never)
842 'always)
843 (t nil)))
844 (setq bs-buffer-show-mark res))
845 (bs--update-current-line)
846 (bs--set-window-height)
847 (bs--show-config-message res)))
849 (defun bs-set-current-buffer-to-show-always (&optional not-to-show-p)
850 "Toggle status of buffer on line to `always shown'.
851 NOT-TO-SHOW-P: prefix argument.
852 With no prefix argument the buffer on current line is marked to show
853 always. Otherwise it is marked to show never."
854 (interactive "P")
855 (if not-to-show-p
856 (bs-set-current-buffer-to-show-never)
857 (bs--set-toggle-to-show (bs--current-buffer) 'always)))
859 (defun bs-set-current-buffer-to-show-never ()
860 "Toggle status of buffer on line to `never shown'."
861 (interactive)
862 (bs--set-toggle-to-show (bs--current-buffer) 'never))
864 (defun bs--set-toggle-to-show (buffer what)
865 "Set value `bs-buffer-show-mark' of buffer BUFFER to WHAT.
866 Redisplay current line and display a message describing
867 the status of buffer on current line."
868 (save-excursion
869 (set-buffer buffer)
870 (setq bs-buffer-show-mark what))
871 (bs--update-current-line)
872 (bs--set-window-height)
873 (bs--show-config-message what))
875 (defun bs-mark-current (count)
876 "Mark buffers.
877 COUNT is the number of buffers to mark.
878 Move cursor vertically down COUNT lines."
879 (interactive "p")
880 (let ((dir (if (> count 0) 1 -1))
881 (count (abs count)))
882 (while (> count 0)
883 (let ((buffer (bs--current-buffer)))
884 (if buffer
885 (setq bs--marked-buffers (cons buffer bs--marked-buffers)))
886 (bs--update-current-line)
887 (bs-down dir))
888 (setq count (1- count)))))
890 (defun bs-unmark-current (count)
891 "Unmark buffers.
892 COUNT is the number of buffers to unmark.
893 Move cursor vertically down COUNT lines."
894 (interactive "p")
895 (let ((dir (if (> count 0) 1 -1))
896 (count (abs count)))
897 (while (> count 0)
898 (let ((buffer (bs--current-buffer)))
899 (if buffer
900 (setq bs--marked-buffers (delq buffer bs--marked-buffers)))
901 (bs--update-current-line)
902 (bs-down dir))
903 (setq count (1- count)))))
905 (defun bs--show-config-message (what)
906 "Show message indicating the new showing status WHAT.
907 WHAT is a value of nil, `never', or `always'."
908 (bs-message-without-log (cond ((null what)
909 "Buffer will be shown normally.")
910 ((eq what 'never)
911 "Mark buffer to never be shown.")
912 (t "Mark buffer to show always."))))
914 (defun bs-delete ()
915 "Kill buffer on current line."
916 (interactive)
917 (let ((current (bs--current-buffer))
918 (inhibit-read-only t))
919 (unless (kill-buffer current)
920 (error "Buffer was not deleted"))
921 (setq bs-current-list (delq current bs-current-list))
922 (beginning-of-line)
923 (delete-region (point) (save-excursion
924 (end-of-line)
925 (if (eobp) (point) (1+ (point)))))
926 (if (eobp)
927 (progn
928 (backward-delete-char 1)
929 (beginning-of-line)
930 (recenter -1)))
931 (bs--set-window-height)))
933 (defun bs-delete-backward ()
934 "Like `bs-delete' but go to buffer in front of current."
935 (interactive)
936 (let ((on-last-line-p (save-excursion (end-of-line) (eobp))))
937 (bs-delete)
938 (unless on-last-line-p
939 (bs-up 1))))
941 (defun bs-show-sorted ()
942 "Show buffer list sorted by buffer name."
943 (interactive)
944 (setq bs--current-sort-function
945 (bs-next-config-aux (car bs--current-sort-function)
946 bs-sort-functions))
947 (bs--redisplay)
948 (bs--goto-current-buffer)
949 (bs-message-without-log "Sorted %s" (car bs--current-sort-function)))
951 (defun bs-apply-sort-faces (&optional sort-description)
952 "Set text properties for the sort described by SORT-DESCRIPTION.
953 SORT-DESCRIPTION is an element of `bs-sort-functions'.
954 Default is `bs--current-sort-function'."
955 (let ((sort-description (or sort-description
956 bs--current-sort-function)))
957 (save-excursion
958 (goto-char (point-min))
959 (if (and (nth 2 sort-description)
960 (search-forward-regexp (nth 2 sort-description) nil t))
961 (let ((inhibit-read-only t))
962 (put-text-property (match-beginning 0)
963 (match-end 0)
964 'face
965 (or (nth 3 sort-description)
966 'region)))))))
968 (defun bs-toggle-show-all ()
969 "Toggle show all buffers / show buffers with current configuration."
970 (interactive)
971 (setq bs--show-all (not bs--show-all))
972 (bs--redisplay)
973 (bs--goto-current-buffer)
974 (bs-message-without-log "%s" (bs--current-config-message)))
976 (defun bs-toggle-readonly ()
977 "Toggle read-only status for buffer on current line.
978 Uses function `vc-toggle-read-only'."
979 (interactive)
980 (let ((buffer (bs--current-buffer)))
981 (save-excursion
982 (set-buffer buffer)
983 (vc-toggle-read-only))
984 (bs--update-current-line)))
986 (defun bs-clear-modified ()
987 "Set modified flag for buffer on current line to nil."
988 (interactive)
989 (let ((buffer (bs--current-buffer)))
990 (save-excursion
991 (set-buffer buffer)
992 (set-buffer-modified-p nil)))
993 (bs--update-current-line))
995 (defun bs--nth-wrapper (count fun &rest args)
996 "Call COUNT times function FUN with arguments ARGS."
997 (setq count (or count 1))
998 (while (> count 0)
999 (apply fun args)
1000 (setq count (1- count))))
1002 (defun bs-up (arg)
1003 "Move cursor vertically up ARG lines in Buffer Selection Menu."
1004 (interactive "p")
1005 (if (and arg (numberp arg) (< arg 0))
1006 (bs--nth-wrapper (- arg) 'bs--down)
1007 (bs--nth-wrapper arg 'bs--up)))
1009 (defun bs--up ()
1010 "Move cursor vertically up one line.
1011 If on top of buffer list go to last line."
1012 (interactive "p")
1013 (previous-line 1)
1014 (if (<= (count-lines 1 (point)) (1- bs-header-lines-length))
1015 (progn
1016 (goto-char (point-max))
1017 (beginning-of-line)
1018 (recenter -1))
1019 (beginning-of-line)))
1021 (defun bs-down (arg)
1022 "Move cursor vertically down ARG lines in Buffer Selection Menu."
1023 (interactive "p")
1024 (if (and arg (numberp arg) (< arg 0))
1025 (bs--nth-wrapper (- arg) 'bs--up)
1026 (bs--nth-wrapper arg 'bs--down)))
1028 (defun bs--down ()
1029 "Move cursor vertically down one line.
1030 If at end of buffer list go to first line."
1031 (let ((last (line-end-position)))
1032 (if (eq last (point-max))
1033 (goto-line (1+ bs-header-lines-length))
1034 (next-line 1))))
1036 (defun bs-visits-non-file (buffer)
1037 "Return t or nil whether BUFFER visits no file.
1038 A value of t means BUFFER belongs to no file.
1039 A value of nil means BUFFER belongs to a file."
1040 (not (buffer-file-name buffer)))
1042 (defun bs-sort-buffer-interns-are-last (b1 b2)
1043 "Function for sorting internal buffers B1 and B2 at the end of all buffers."
1046 ;; ----------------------------------------------------------------------
1047 ;; Configurations:
1048 ;; ----------------------------------------------------------------------
1050 (defun bs-config-clear ()
1051 "*Reset all variables which specify a configuration.
1052 These variables are `bs-dont-show-regexp', `bs-must-show-regexp',
1053 `bs-dont-show-function', `bs-must-show-function' and
1054 `bs-buffer-sort-function'."
1055 (setq bs-dont-show-regexp nil
1056 bs-must-show-regexp nil
1057 bs-dont-show-function nil
1058 bs-must-show-function nil
1059 bs-buffer-sort-function nil))
1061 (defun bs-config--only-files ()
1062 "Define a configuration for showing only buffers visiting a file."
1063 (bs-config-clear)
1064 (setq ;; I want to see *-buffers at the end
1065 bs-buffer-sort-function 'bs-sort-buffer-interns-are-last
1066 ;; Don't show files who don't belong to a file
1067 bs-dont-show-function 'bs-visits-non-file))
1069 (defun bs-config--files-and-scratch ()
1070 "Define a configuration for showing buffer *scratch* and file buffers."
1071 (bs-config-clear)
1072 (setq ;; I want to see *-buffers at the end
1073 bs-buffer-sort-function 'bs-sort-buffer-interns-are-last
1074 ;; Don't show files who don't belong to a file
1075 bs-dont-show-function 'bs-visits-non-file
1076 ;; Show *scratch* buffer.
1079 (defun bs-config--all ()
1080 "Define a configuration for showing all buffers.
1081 Reset all according variables by `bs-config-clear'."
1082 (bs-config-clear))
1084 (defun bs-config--all-intern-last ()
1085 "Define a configuration for showing all buffers.
1086 Internal buffers appear at end of all buffers."
1087 (bs-config-clear)
1088 ;; I want to see *-buffers at the end
1089 (setq bs-buffer-sort-function 'bs-sort-buffer-interns-are-last))
1091 (defun bs-set-configuration (name)
1092 "Set configuration to the one saved under string NAME in `bs-configurations'.
1093 When called interactively ask user for a configuration and apply selected
1094 configuration."
1095 (interactive (list (completing-read "Use configuration: "
1096 bs-configurations
1097 nil
1098 t)))
1099 (let ((list (assoc name bs-configurations)))
1100 (if list
1101 (if (listp list)
1102 (setq bs-current-configuration name
1103 bs-must-show-regexp (nth 1 list)
1104 bs-must-show-function (nth 2 list)
1105 bs-dont-show-regexp (nth 3 list)
1106 bs-dont-show-function (nth 4 list)
1107 bs-buffer-sort-function (nth 5 list))
1108 ;; for backward compability
1109 (funcall (cdr list)))
1110 ;; else
1111 (ding)
1112 (bs-message-without-log "No bs-configuration named %S." name))))
1114 (defun bs-help ()
1115 "Help for `bs-show'."
1116 (interactive)
1117 (describe-function 'bs-mode))
1119 (defun bs-next-config-aux (start-name list)
1120 "Get the next assoc after START-NAME in list LIST.
1121 Will return the first if START-NAME is at end."
1122 (let ((assocs list)
1123 (length (length list))
1124 pos)
1125 (while (and assocs (not pos))
1126 (if (string= (car (car assocs)) start-name)
1127 (setq pos (- length (length assocs))))
1128 (setq assocs (cdr assocs)))
1129 (setq pos (1+ pos))
1130 (if (eq pos length)
1131 (car list)
1132 (nth pos list))))
1134 (defun bs-next-config (name)
1135 "Return next configuration with respect to configuration with name NAME."
1136 (bs-next-config-aux name bs-configurations))
1138 (defun bs-select-next-configuration (&optional start-name)
1139 "Apply next configuration START-NAME and refresh buffer list.
1140 If START-NAME is nil the current configuration `bs-current-configuration'
1141 will be used."
1142 (interactive)
1143 (let ((config (bs-next-config (or start-name bs-current-configuration))))
1144 (bs-set-configuration (car config))
1145 (setq bs-default-configuration bs-current-configuration)
1146 (bs--redisplay t)
1147 (bs--set-window-height)
1148 (bs-message-without-log "Selected configuration: %s" (car config))))
1150 (defun bs-show-in-buffer (list)
1151 "Display buffer list LIST in buffer *buffer-selection*.
1152 Select buffer *buffer-selection* and display buffers according to current
1153 configuration `bs-current-configuration'. Set window height, fontify buffer
1154 and move point to current buffer."
1155 (setq bs-current-list list)
1156 (switch-to-buffer (get-buffer-create "*buffer-selection*"))
1157 (bs-mode)
1158 (let* ((inhibit-read-only t)
1159 (map-fun (lambda (entry)
1160 (length (buffer-name entry))))
1161 (max-length-of-names (apply 'max
1162 (cons 0 (mapcar map-fun list))))
1163 (name-entry-length (min bs-maximal-buffer-name-column
1164 (max bs-minimal-buffer-name-column
1165 max-length-of-names))))
1166 (erase-buffer)
1167 (setq bs--name-entry-length name-entry-length)
1168 (bs--show-header)
1169 (while list
1170 (bs--insert-one-entry (car list))
1172 (setq list (cdr list)))
1173 (delete-backward-char 1)
1174 (bs--set-window-height)
1175 (bs--goto-current-buffer)
1176 (font-lock-fontify-buffer)
1177 (bs-apply-sort-faces)))
1179 (defun bs-next-buffer (&optional buffer-list sorting-p)
1180 "Return next buffer and buffer list for buffer cycling in BUFFER-LIST.
1181 Ignore sorting when SORTING-P is nil.
1182 If BUFFER-LIST is nil the result of `bs-buffer-list' will be used as
1183 buffer list. The result is a cons of normally the second element of
1184 BUFFER-LIST and the buffer list used for buffer cycling."
1185 (let* ((bs--current-sort-function (if sorting-p
1186 bs--current-sort-function))
1187 (bs-buffer-list (or buffer-list (bs-buffer-list))))
1188 (cons (or (car (cdr bs-buffer-list))
1189 (car bs-buffer-list)
1190 (current-buffer))
1191 bs-buffer-list)))
1193 (defun bs-previous-buffer (&optional buffer-list sorting-p)
1194 "Return previous buffer and buffer list for buffer cycling in BUFFER-LIST.
1195 Ignore sorting when SORTING-P is nil.
1196 If BUFFER-LIST is nil the result of `bs-buffer-list' will be used as
1197 buffer list. The result is a cons of last element of BUFFER-LIST and the
1198 buffer list used for buffer cycling."
1199 (let* ((bs--current-sort-function (if sorting-p
1200 bs--current-sort-function))
1201 (bs-buffer-list (or buffer-list (bs-buffer-list))))
1202 (cons (or (car (last bs-buffer-list))
1203 (current-buffer))
1204 bs-buffer-list)))
1206 (defun bs-message-without-log (&rest args)
1207 "Like `message' but don't log it on the message log.
1208 All arguments ARGS are transferred to function `message'."
1209 (let ((message-log-max nil))
1210 (apply 'message args)))
1212 (defvar bs--cycle-list nil
1213 "Current buffer list used for cycling.")
1215 ;;;###autoload
1216 (defun bs-cycle-next ()
1217 "Select next buffer defined by buffer cycling.
1218 The buffers taking part in buffer cycling are defined
1219 by buffer configuration `bs-cycle-configuration-name'."
1220 (interactive)
1221 (let ((bs--buffer-coming-from (current-buffer))
1222 (bs-dont-show-regexp bs-dont-show-regexp)
1223 (bs-must-show-regexp bs-must-show-regexp)
1224 (bs-dont-show-function bs-dont-show-function)
1225 (bs-must-show-function bs-must-show-function)
1226 (bs--show-all nil))
1227 (bs-set-configuration (or bs-cycle-configuration-name bs-default-configuration))
1228 (let ((bs-buffer-sort-function nil)
1229 (bs--current-sort-function nil))
1230 (let* ((tupel (bs-next-buffer (if (or (eq last-command
1231 'bs-cycle-next)
1232 (eq last-command
1233 'bs-cycle-previous))
1234 bs--cycle-list)))
1235 (next (car tupel))
1236 (cycle-list (cdr tupel)))
1237 (setq bs--cycle-list (append (cdr cycle-list)
1238 (list (car cycle-list))))
1239 (bury-buffer)
1240 (switch-to-buffer next)
1241 (bs-message-without-log "Next buffers: %s"
1242 (or (cdr bs--cycle-list)
1243 "this buffer"))))))
1246 ;;;###autoload
1247 (defun bs-cycle-previous ()
1248 "Select previous buffer defined by buffer cycling.
1249 The buffers taking part in buffer cycling are defined
1250 by buffer configuration `bs-cycle-configuration-name'."
1251 (interactive)
1252 (let ((bs--buffer-coming-from (current-buffer))
1253 (bs-dont-show-regexp bs-dont-show-regexp)
1254 (bs-must-show-regexp bs-must-show-regexp)
1255 (bs-dont-show-function bs-dont-show-function)
1256 (bs-must-show-function bs-must-show-function)
1257 (bs--show-all nil))
1258 (bs-set-configuration (or bs-cycle-configuration-name bs-default-configuration))
1259 (let ((bs-buffer-sort-function nil)
1260 (bs--current-sort-function nil))
1261 (let* ((tupel (bs-previous-buffer (if (or (eq last-command
1262 'bs-cycle-next)
1263 (eq last-command
1264 'bs-cycle-previous))
1265 bs--cycle-list)))
1266 (prev-buffer (car tupel))
1267 (cycle-list (cdr tupel)))
1268 (setq bs--cycle-list (append (last cycle-list)
1269 (reverse (cdr (reverse cycle-list)))))
1270 (switch-to-buffer prev-buffer)
1271 (bs-message-without-log "Previous buffers: %s"
1272 (or (reverse (cdr bs--cycle-list))
1273 "this buffer"))))))
1275 (defun bs--get-value (fun &optional args)
1276 "Apply function FUN with arguments ARGS.
1277 Return result of evaluation. Will return FUN if FUN is a number
1278 or a string."
1279 (cond ((numberp fun)
1280 fun)
1281 ((stringp fun)
1282 fun)
1283 (t (apply fun args))))
1285 (defun bs--get-marked-string (start-buffer all-buffers)
1286 "Return a string which describes whether current buffer is marked.
1287 START-BUFFER is the buffer where we started buffer selection.
1288 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu.
1289 The result string is one of `bs-string-current', `bs-string-current-marked',
1290 `bs-string-marked', `bs-string-show-normally', `bs-string-show-never', or
1291 `bs-string-show-always'."
1292 (cond ;; current buffer is the buffer we started buffer selection.
1293 ((eq (current-buffer) start-buffer)
1294 (if (memq (current-buffer) bs--marked-buffers)
1295 bs-string-current-marked ; buffer is marked
1296 bs-string-current))
1297 ;; current buffer is marked
1298 ((memq (current-buffer) bs--marked-buffers)
1299 bs-string-marked)
1300 ;; current buffer hasn't a special mark.
1301 ((null bs-buffer-show-mark)
1302 bs-string-show-normally)
1303 ;; current buffer has a mark not to show itself.
1304 ((eq bs-buffer-show-mark 'never)
1305 bs-string-show-never)
1306 ;; otherwise current buffer is marked to show always.
1307 (t
1308 bs-string-show-always)))
1310 (defun bs--get-modified-string (start-buffer all-buffers)
1311 "Return a string which describes whether current buffer is modified.
1312 START-BUFFER is the buffer where we started buffer selection.
1313 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu."
1314 (if (buffer-modified-p) "*" " "))
1316 (defun bs--get-readonly-string (start-buffer all-buffers)
1317 "Return a string which describes whether current buffer is read only.
1318 START-BUFFER is the buffer where we started buffer selection.
1319 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu."
1320 (if buffer-read-only "%" " "))
1322 (defun bs--get-size-string (start-buffer all-buffers)
1323 "Return a string which describes the size of current buffer.
1324 START-BUFFER is the buffer where we started buffer selection.
1325 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu."
1326 (int-to-string (buffer-size)))
1328 (defun bs--get-name (start-buffer all-buffers)
1329 "Return name of current buffer for Buffer Selection Menu.
1330 The name of current buffer gets additional text properties
1331 for mouse highlighting.
1332 START-BUFFER is the buffer where we started buffer selection.
1333 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu."
1334 (let ((name (copy-sequence (buffer-name))))
1335 (add-text-properties
1336 0 (length name)
1337 '(mouse-face highlight
1338 help-echo
1339 "mouse-2: select this buffer, mouse-3: select in other frame")
1340 name)
1341 (if (< (length name) bs--name-entry-length)
1342 (concat name
1343 (make-string (- bs--name-entry-length (length name)) ? ))
1344 name)))
1346 (defun bs--get-mode-name (start-buffer all-buffers)
1347 "Return the name of mode of current buffer for Buffer Selection Menu.
1348 START-BUFFER is the buffer where we started buffer selection.
1349 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu."
1350 mode-name)
1352 (defun bs--get-file-name (start-buffer all-buffers)
1353 "Return string for column 'File' in Buffer Selection Menu.
1354 This is the variable `buffer-file-name' of current buffer.
1355 If current mode is `dired-mode' or `shell-mode' it returns the
1356 default directory.
1357 START-BUFFER is the buffer where we started buffer selection.
1358 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu."
1359 (let ((string (copy-sequence (if (member major-mode
1360 '(shell-mode dired-mode))
1361 default-directory
1362 (or buffer-file-name "")))))
1363 (add-text-properties
1364 0 (length string)
1365 '(mouse-face highlight
1366 help-echo "mouse-2: select this buffer, mouse-3: select in other frame")
1367 string)
1368 string))
1370 (defun bs--insert-one-entry (buffer)
1371 "Generate one entry for buffer BUFFER in Buffer Selection Menu.
1372 It goes over all columns described in `bs-attributes-list'
1373 and evaluates corresponding string. Inserts string in current buffer;
1374 normally *buffer-selection*."
1375 (let ((string "")
1376 (columns bs-attributes-list)
1377 (to-much 0)
1378 (apply-args (append (list bs--buffer-coming-from bs-current-list))))
1379 (save-excursion
1380 (while columns
1381 (set-buffer buffer)
1382 (let ((min (bs--get-value (nth 1 (car columns))))
1383 ;;(max (bs--get-value (nth 2 (car columns)))) refered no more
1384 (align (nth 3 (car columns)))
1385 (fun (nth 4 (car columns)))
1386 (val nil)
1387 new-string)
1388 (setq val (bs--get-value fun apply-args))
1389 (setq new-string (bs--format-aux val align (- min to-much)))
1390 (setq string (concat string new-string))
1391 (if (> (length new-string) min)
1392 (setq to-much (- (length new-string) min)))
1393 ) ; let
1394 (setq columns (cdr columns))))
1395 (insert string)
1396 string))
1398 (defun bs--format-aux (string align len)
1399 "Generate a string with STRING with alignment ALIGN and length LEN.
1400 ALIGN is one of the symbols `left', `middle', or `right'."
1401 (let ((length (length string)))
1402 (if (>= length len)
1403 string
1404 (if (eq 'right align)
1405 (concat (make-string (- len length) ? ) string)
1406 (concat string (make-string (- len length) ? ))))))
1408 (defun bs--show-header ()
1409 "Insert header for Buffer Selection Menu in current buffer."
1410 (mapcar '(lambda (string)
1412 (bs--create-header)))
1414 (defun bs--get-name-length ()
1415 "Return value of `bs--name-entry-length'."
1416 bs--name-entry-length)
1418 (defun bs--create-header ()
1419 "Return all header lines used in Buffer Selection Menu as a list of strings."
1420 (list (mapconcat (lambda (column)
1421 (bs--format-aux (bs--get-value (car column))
1422 (nth 3 column) ; align
1423 (bs--get-value (nth 1 column))))
1424 bs-attributes-list
1425 "")
1426 (mapconcat (lambda (column)
1427 (let ((length (length (bs--get-value (car column)))))
1428 (bs--format-aux (make-string length ?-)
1429 (nth 3 column) ; align
1430 (bs--get-value (nth 1 column)))))
1431 bs-attributes-list
1432 "")))
1434 (defun bs--show-with-configuration (name &optional arg)
1435 "Display buffer list of configuration with name NAME.
1436 Set configuration NAME and determine window for Buffer Selection Menu.
1437 Unless current buffer is buffer *buffer-selection* we have to save
1438 the buffer we started Buffer Selection Menu and the current window
1439 configuration to restore buffer and window configuration after a
1440 selection. If there is already a window displaying *buffer-selection*
1441 select this window for Buffer Selection Menu. Otherwise open a new
1442 window.
1443 The optional argument ARG is the prefix argument when calling a function
1444 for buffer selection."
1445 (bs-set-configuration name)
1446 (let ((bs--show-all (or bs--show-all arg)))
1447 (unless (string= "*buffer-selection*" (buffer-name))
1448 ;; Only when not in buffer *buffer-selection*
1449 ;; we have to set the buffer we started the command
1450 (progn
1451 (setq bs--buffer-coming-from (current-buffer))
1452 (setq bs--window-config-coming-from (current-window-configuration))))
1453 (let ((liste (bs-buffer-list))
1454 (active-window (bs--window-for-buffer "*buffer-selection*")))
1455 (if active-window
1456 (select-window active-window)
1457 (if (> (window-height (selected-window)) 7)
1458 (progn
1459 (split-window-vertically)
1460 (other-window 1))))
1461 (bs-show-in-buffer liste)
1462 (bs-message-without-log "%s" (bs--current-config-message)))))
1464 (defun bs--configuration-name-for-prefix-arg (prefix-arg)
1465 "Convert prefix argument PREFIX-ARG to a name of a buffer configuration.
1466 If PREFIX-ARG is nil return `bs-default-configuration'.
1467 If PREFIX-ARG is an integer return PREFIX-ARG element of `bs-configurations'.
1468 Otherwise return `bs-alternative-configuration'."
1469 (cond ;; usually activation
1470 ((null prefix-arg)
1471 bs-default-configuration)
1472 ;; call with integer as prefix argument
1473 ((integerp prefix-arg)
1474 (if (and (< 0 prefix-arg) (<= prefix-arg (length bs-configurations)))
1475 (car (nth (1- prefix-arg) bs-configurations))
1476 bs-default-configuration))
1477 ;; call by prefix argument C-u
1478 (t bs-alternative-configuration)))
1480 ;; ----------------------------------------------------------------------
1481 ;; Main function bs-customize and bs-show
1482 ;; ----------------------------------------------------------------------
1484 ;;;###autoload
1485 (defun bs-customize ()
1486 "Customization of group bs for Buffer Selection Menu."
1487 (interactive)
1488 (customize-group "bs"))
1490 ;;;###autoload
1491 (defun bs-show (arg)
1492 "Make a menu of buffers so you can manipulate buffers or the buffer list.
1494 There are many key commands similar to `Buffer-menu-mode' for
1495 manipulating buffer list and buffers itself.
1496 User can move with [up] or [down], select a buffer
1500 With prefix argument ARG show a different buffer list. Function
1501 `bs--configuration-name-for-prefix-arg' determine accordingly
1502 name of buffer configuration."
1503 (interactive "P")
1504 (setq bs--marked-buffers nil)
1505 (bs--show-with-configuration (bs--configuration-name-for-prefix-arg arg)))
1507 ;; Now provide feature bs
1508 (provide 'bs)
1510 ;;; arch-tag: c0d9ab34-bf06-4368-ae9d-af88878e6802
1511 ;;; bs.el ends here