| blob | f095a98dc00cd9db1177e58ec7bc597336279c88 |
1 ;;; bs.el --- menu for selecting and displaying buffers
3 ;; Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004,
4 ;; 2005, 2006 Free Software Foundation, Inc.
5 ;; Author: Olaf Sylvester <Olaf.Sylvester@netsurf.de>
6 ;; Maintainer: Olaf Sylvester <Olaf.Sylvester@netsurf.de>
7 ;; Keywords: convenience
9 ;; This file is part of GNU Emacs.
11 ;; GNU Emacs is free software; you can redistribute it and/or modify
12 ;; it under the terms of the GNU General Public License as published by
13 ;; the Free Software Foundation; either version 2, or (at your option)
14 ;; any later version.
16 ;; GNU Emacs is distributed in the hope that it will be useful,
17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 ;; GNU General Public License for more details.
21 ;; You should have received a copy of the GNU General Public License
22 ;; along with GNU Emacs; see the file COPYING. If not, write to the
23 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
24 ;; Boston, MA 02110-1301, USA.
26 ;;; Commentary:
28 ;; Version: 1.17
29 ;; X-URL: http://www.geekware.de/software/emacs
30 ;;
31 ;; The bs-package contains a main function bs-show for poping up a
32 ;; buffer in a way similar to `list-buffers' and `electric-buffer-list':
33 ;; The new buffer offers a Buffer Selection Menu for manipulating
34 ;; the buffer list and buffers.
35 ;;
36 ;; -----------------------------------------------------------------------
37 ;; | MR Buffer Size Mode File |
38 ;; | -- ------ ---- ---- ---- |
39 ;; |. bs.el 14690 Emacs-Lisp /home/sun/sylvester/el/bs.e$|
40 ;; | % executable.el 9429 Emacs-Lisp /usr/share/emacs/19.34/lisp$|
41 ;; | % vc.el 104893 Emacs-Lisp /usr/share/emacs/19.34/lisp$|
42 ;; | % test_vc.el 486 Emacs-Lisp /home/sun/sylvester/el/test$|
43 ;; | % vc-hooks.el 43605 Emacs-Lisp /usr/share/emacs/19.34/lisp$|
44 ;; -----------------------------------------------------------------------
46 ;;; Quick Installation und Customization:
48 ;; Use
49 ;; M-x bs-show
50 ;; for buffer selection or optional bind a key to main function `bs-show'
51 ;; (global-set-key "\C-x\C-b" 'bs-show) ;; or another key
52 ;;
53 ;; For customization use
54 ;; M-x bs-customize
57 ;;; More Commentary:
59 ;; bs-show will generate a new buffer named *buffer-selection*, which shows
60 ;; all buffers or a subset of them, and has possibilities for deleting,
61 ;; saving and selecting buffers. For more details see docstring of
62 ;; function `bs-mode'. A current configuration describes which buffers appear
63 ;; in *buffer-selection*. See docstring of variable `bs-configurations' for
64 ;; more details.
65 ;;
66 ;; The package bs combines the advantages of the Emacs functions
67 ;; `list-buffers' and `electric-buffer-list'.
68 ;;
69 ;; Additional features for Buffer Selection Menu:
70 ;; - configurable list of buffers (show only files etc.).
71 ;; - comfortable way to change displayed subset of all buffers.
72 ;; - show sorted list of buffers.
73 ;; - cyclic navigation:
74 ;; - goes to top of buffer list if you are on last line and press down.
75 ;; - goes to end of buffer list if you are on first line and press up.
76 ;; - Offer an alternative buffer list by prefix key C-u.
78 ;;; Cycling through buffers
80 ;; This package offers two functions for buffer cycling. If you want to cycle
81 ;; through buffer list you can use `bs-cycle-next' or `bs-cycle-previous'.
82 ;; Bind these function to a key like
83 ;; (global-set-key [(f9)] 'bs-cycle-previous)
84 ;; (global-set-key [(f10)] 'bs-cycle-next)
85 ;;
86 ;; Both functions use a special subset of all buffers for cycling to avoid
87 ;; to go through internal buffers like *Messages*.
88 ;;
89 ;; Cycling through buffers ignores sorting because sorting destroys
90 ;; the logical buffer list. If buffer list is sorted by size you
91 ;; won't be able to cycle to the smallest buffer.
93 ;;; Customization:
95 ;; There is a customization group called `bs' in group `convenience'.
96 ;; Start customization by M-x bs-customize
97 ;;
98 ;; Buffer list
99 ;; -----------
100 ;; You can define your own configurations by extending variable
101 ;; `bs-configurations' (see docstring for details).
102 ;;
103 ;; `bs-default-configuration' contains the name of default configuration.
104 ;; The default value is "files" which means to show only files.
105 ;;
106 ;; If you always want to see all buffers, customize variable
107 ;; `bs-default-configuration' in customization group `bs'.
108 ;;
109 ;; Configure sorting
110 ;; -----------------
111 ;; You can define functions for sorting the buffer list.
112 ;; When selecting buffers, you can step through available sorting
113 ;; methods with key 'S'.
114 ;; To define a new way of sorting, customize variable `bs-sort-functions'.
115 ;;
116 ;; There are four basic functions for sorting:
117 ;; by buffer name, by mode, by size, or by filename
118 ;;
119 ;; Configure buffer cycling
120 ;; ------------------------
121 ;; When cycling through buffer list the functions for cycling will use
122 ;; the current configuration of bs to calculate the buffer list.
123 ;; If you want to use a different configuration for cycling you have to set
124 ;; the variable `bs-cycle-configuration-name'. You can customize this variable.
125 ;;
126 ;; For example: If you use the configuration called "files-and-scratch" you
127 ;; can cycle through all file buffers and *scratch* although your current
128 ;; configuration perhaps is "files" which ignores buffer *scratch*.
130 ;;; History:
132 ;;; Code:
136 ;; ----------------------------------------------------------------------
137 ;; Globals for customization
138 ;; ----------------------------------------------------------------------
141 "Buffer Selection: Maintaining buffers by buffer menu."
148 "Buffer Selection appearance: Appearance of bs buffer menu."
163 "*List specifying the layout of a Buffer Selection Menu buffer.
164 Each entry specifies a column and is a list of the form of:
165 \(HEADER MINIMUM-LENGTH MAXIMUM-LENGTH ALIGNMENT FUN-OR-STRING)
167 HEADER : String for header for first line or a function
168 which calculates column title.
169 MINIMUM-LENGTH : Minimum width of column (number or name of function).
170 The function must return a positive integer.
171 MAXIMUM-LENGTH : Maximum width of column (number or name of function)
172 (currently ignored).
173 ALIGNMENT : Alignment of column (`left', `right', `middle').
174 FUN-OR-STRING : Name of a function for calculating the value or a
175 string for a constant value.
177 The function gets as parameter the buffer where we have started
178 buffer selection and the list of all buffers to show. The function must
179 return a string representing the column's value."
184 "Return a regexp matching the first line of a Buffer Selection Menu buffer."
192 ;; Font-Lock-Settings
197 ;; Buffername embedded by *
199 1
200 ;; problem in XEmacs with font-lock-constant-face
202 'font-lock-constant-face
204 ;; Dired-Buffers
206 ;; the star for modified buffers
211 "*Maximal window height of Buffer Selection Menu."
216 "Regular expression specifying which buffers not to show.
217 A buffer whose name matches this regular expression will not be
221 "Regular expression for specifying buffers which must be shown.
222 A buffer whose name matches this regular expression will be
223 included in the buffer list.
224 Note that this variable is temporary: if the configuration is changed
225 it is reset to nil. Use `bs-must-always-show-regexp' to specify buffers
229 "*Regular expression for specifying buffers to show always.
230 A buffer whose name matches this regular expression will
231 be shown regardless of current configuration of Buffer Selection Menu."
236 "Function for specifying buffers not to show.
237 The function gets one argument - the buffer to test. The function must
238 return a value different from nil to ignore the buffer in
242 "Function for specifying buffers which must be shown.
246 "Sort function to sort the buffers that appear in Buffer Selection Menu.
250 "*Maximum column width for buffer names.
251 The column for buffer names has dynamic width. The width depends on
252 maximal and minimal length of names of buffers to show. The maximal
253 width is bounded by `bs-maximal-buffer-name-column'.
254 See also `bs-minimal-buffer-name-column'."
259 "*Minimum column width for buffer names.
260 The column for buffer names has dynamic width. The width depends on
261 maximal and minimal length of names of buffers to show. The minimal
262 width is bounded by `bs-minimal-buffer-name-column'.
263 See also `bs-maximal-buffer-name-column'."
274 bs-sort-buffer-interns-are-last)
276 "*List of all configurations you can use in the Buffer Selection Menu.
277 A configuration describes which buffers appear in Buffer Selection Menu
278 and also the order of buffers. A configuration is a list with
279 six elements. The first element is a string and describes the configuration.
280 The following five elements represent the values for Buffer Selection Menu
281 configuration variables `bs-must-show-regexp', `bs-must-show-function',
282 `bs-dont-show-regexp', `bs-dont-show-function' and `bs-buffer-sort-function'.
283 By setting these variables you define a configuration."
288 "*Name of default configuration used by the Buffer Selection Menu.
291 Must be a string used in `bs-configurations' for naming a configuration."
296 "*Name of configuration used when calling `bs-show' with \
298 Must be a string used in `bs-configurations' for naming a configuration."
303 "Name of current configuration.
307 "*Name of configuration used when cycling through the buffer list.
308 A value of nil means to use current configuration `bs-default-configuration'.
309 Must be a string used in `bs-configurations' for naming a configuration."
312 string))
315 "*String added in column 1 indicating a buffer will always be shown."
320 "*String added in column 1 indicating a buffer will never be shown."
325 "*String added in column 1 indicating the current buffer."
330 "*String added in column 1 indicating the current buffer when it is marked."
335 "*String added in column 1 indicating a marked buffer."
340 "*String added in column 1 indicating a unmarked buffer."
345 "Maximum length of all displayed buffer names.
348 ;; ----------------------------------------------------------------------
349 ;; Internal globals
350 ;; ----------------------------------------------------------------------
353 "Flag for the current mode for showing this buffer.
354 A value of nil means buffer will be shown depending on the current
355 configuration.
356 A value of `never' means to never show the buffer.
361 ;; Make face named region (for XEmacs)
367 "Compare buffers B1 and B2 by buffer name."
372 "Compare buffers B1 and B2 by file name."
377 "Compare buffers B1 and B2 by mode name."
383 "Compare buffers B1 and B2 by buffer size."
394 "*List of all possible sorting aspects for Buffer Selection Menu.
395 You can add a new entry with a call to `bs-define-sort-function'.
396 Each element is a list of four elements (NAME FUNCTION REGEXP-FOR-SORTING FACE)
397 NAME specifies the sort order defined by function FUNCTION.
398 FUNCTION nil means don't sort the buffer list. Otherwise the functions
399 must have two parameters - the buffers to compare.
400 REGEXP-FOR-SORTING is a regular expression which describes the
401 column title to highlight.
402 FACE is a face used to fontify the sorted column title. A value of nil means
403 don't highlight."
408 "Define a new function for buffer sorting in Buffer Selection Menu.
409 NAME specifies the sort order defined by function FUN.
410 A value of nil for FUN means don't sort the buffer list. Otherwise the
411 functions must have two parameters - the buffers to compare.
412 REGEXP-FOR-SORTING is a regular expression which describes the
413 column title to highlight.
414 FACE is a face used to fontify the sorted column title. A value of nil means
415 don't highlight.
416 The new sort aspect will be inserted into list `bs-sort-functions'."
422 bs-sort-functions)))))
425 "Description of the current function for sorting the buffer list.
429 "*Name of default sort behavior.
443 "Flag whether showing all buffers regardless of current configuration.
444 Non nil means to show all buffers. Otherwise show buffers
451 "Regular expression specifying which buffers never to show.
452 A buffer whose name matches this regular expression will never be
456 "List of buffers shown in Buffer Selection Menu.
470 (define-key map "F" 'bs-select-other-frame)
471 (let ((key ?1))
472 (while (<= key ?9)
473 (define-key map (char-to-string key) 'digit-argument)
474 (setq key (1+ key))))
475 (define-key map "-" 'negative-argument)
476 (define-key map "\e-" 'negative-argument)
477 (define-key map "o" 'bs-select-other-window)
478 (define-key map "\C-o" 'bs-tmp-select-other-window)
479 ;; for GNU EMACS
480 (define-key map [mouse-3] 'bs-mouse-select-other-frame)
481 ;; for XEmacs
482 (define-key map [button3] 'bs-mouse-select-other-frame)
483 (define-key map [up] 'bs-up)
484 (define-key map "n" 'bs-down)
485 (define-key map "p" 'bs-up)
486 (define-key map [down] 'bs-down)
487 (define-key map "\C-m" 'bs-select)
488 (define-key map "b" 'bs-bury-buffer)
489 (define-key map "s" 'bs-save)
490 (define-key map "S" 'bs-show-sorted)
491 (define-key map "a" 'bs-toggle-show-all)
492 (define-key map "d" 'bs-delete)
493 (define-key map "\C-d" 'bs-delete-backward)
494 (define-key map "k" 'bs-delete)
495 (define-key map "g" 'bs-refresh)
496 (define-key map "C" 'bs-set-configuration-and-refresh)
497 (define-key map "c" 'bs-select-next-configuration)
498 (define-key map "q" 'bs-kill)
499 ;; (define-key map "z" 'bs-kill)
500 (define-key map "\C-c\C-c" 'bs-kill)
501 (define-key map "\C-g" 'bs-abort)
502 (define-key map "\C-]" 'bs-abort)
503 (define-key map "%" 'bs-toggle-readonly)
504 (define-key map "~" 'bs-clear-modified)
505 (define-key map "M" 'bs-toggle-current-to-show)
506 (define-key map "+" 'bs-set-current-buffer-to-show-always)
507 ;;(define-key map "-" 'bs-set-current-buffer-to-show-never)
508 (define-key map "t" 'bs-visit-tags-table)
509 (define-key map "m" 'bs-mark-current)
510 (define-key map "u" 'bs-unmark-current)
511 (define-key map ">" 'scroll-right)
512 (define-key map "<" 'scroll-left)
513 (define-key map "?" 'bs-help)
514 map)
515 "Keymap of `bs-mode'.")
517 ;; ----------------------------------------------------------------------
518 ;; Functions
519 ;; ----------------------------------------------------------------------
521 (defun bs-buffer-list (&optional list sort-description)
522 "Return a list of buffers to be shown.
523 LIST is a list of buffers to test for appearance in Buffer Selection Menu.
524 The result list depends on the global variables `bs-dont-show-regexp',
525 `bs-must-show-regexp', `bs-dont-show-function', `bs-must-show-function'
526 and `bs-buffer-sort-function'.
527 If SORT-DESCRIPTION isn't nil the list will be sorted by
528 a special function. SORT-DESCRIPTION is an element of `bs-sort-functions'."
529 (setq sort-description (or sort-description bs--current-sort-function)
530 list (or list (buffer-list)))
531 (let ((result nil))
532 (while list
533 (let* ((buffername (buffer-name (car list)))
534 (int-show-never (string-match bs--intern-show-never buffername))
535 (ext-show-never (and bs-dont-show-regexp
536 (string-match bs-dont-show-regexp
537 buffername)))
538 (extern-must-show (or (and bs-must-always-show-regexp
539 (string-match
540 bs-must-always-show-regexp
541 buffername))
542 (and bs-must-show-regexp
543 (string-match bs-must-show-regexp
544 buffername))))
545 (extern-show-never-from-fun (and bs-dont-show-function
546 (funcall bs-dont-show-function
547 (car list))))
548 (extern-must-show-from-fun (and bs-must-show-function
549 (funcall bs-must-show-function
550 (car list))))
551 (show-flag (buffer-local-value 'bs-buffer-show-mark (car list))))
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 (buffer-disable-undo)
656 (setq major-mode 'bs-mode
657 mode-name "Buffer-Selection-Menu"
658 buffer-read-only t
659 truncate-lines t
660 font-lock-defaults '(bs-mode-font-lock-keywords t)
661 font-lock-verbose nil)
662 (run-mode-hooks 'bs-mode-hook))
664 (defun bs-kill ()
665 "Let buffer disappear and reset window-configuration."
666 (interactive)
667 (bury-buffer (current-buffer))
668 (set-window-configuration bs--window-config-coming-from))
670 (defun bs-abort ()
671 "Ding and leave Buffer Selection Menu without a selection."
672 (interactive)
673 (ding)
674 (bs-kill))
676 (defun bs-set-configuration-and-refresh ()
677 "Ask user for a configuration and apply selected configuration.
678 Refresh whole Buffer Selection Menu."
679 (interactive)
680 (call-interactively 'bs-set-configuration)
681 (bs--redisplay t))
683 (defun bs-refresh ()
684 "Refresh whole Buffer Selection Menu."
685 (interactive)
686 (bs--redisplay t))
688 (defun bs--window-for-buffer (buffer-name)
689 "Return a window showing a buffer with name BUFFER-NAME.
690 Take only windows of current frame into account.
691 Return nil if there is no such buffer."
692 (let ((window nil))
693 (walk-windows (lambda (wind)
694 (if (string= (buffer-name (window-buffer wind))
695 buffer-name)
696 (setq window wind))))
697 window))
699 (defun bs--set-window-height ()
700 "Change the height of the selected window to suit the current buffer list."
701 (unless (one-window-p t)
702 (fit-window-to-buffer (selected-window) bs-max-window-height)))
704 (defun bs--current-buffer ()
705 "Return buffer on current line.
706 Raise an error if not on a buffer line."
707 (beginning-of-line)
708 (let ((line (+ (- bs-header-lines-length)
709 (count-lines 1 (point)))))
710 (if (< line 0)
711 (error "You are on a header row"))
712 (nth line bs-current-list)))
714 (defun bs--update-current-line ()
715 "Update the entry on current line for Buffer Selection Menu."
716 (let ((buffer (bs--current-buffer))
717 (inhibit-read-only t))
718 (beginning-of-line)
719 (delete-region (point) (line-end-position))
720 (bs--insert-one-entry buffer)
721 (beginning-of-line)))
723 (defun bs-view ()
724 "View current line's buffer in View mode.
725 Leave Buffer Selection Menu."
726 (interactive)
727 (view-buffer (bs--current-buffer)))
729 (defun bs-select ()
730 "Select current line's buffer and other marked buffers.
731 If there are no marked buffers the window configuration before starting
732 Buffer Selectin Menu will be restored.
733 If there are marked buffers each marked buffer and the current line's buffer
734 will be selected in a window.
735 Leave Buffer Selection Menu."
736 (interactive)
737 (let ((buffer (bs--current-buffer)))
738 (bury-buffer (current-buffer))
739 (set-window-configuration bs--window-config-coming-from)
740 (switch-to-buffer buffer)
741 (if bs--marked-buffers
742 ;; Some marked buffers for selection
743 (let* ((all (delq buffer bs--marked-buffers))
744 (height (/ (1- (frame-height)) (1+ (length all)))))
745 (delete-other-windows)
746 (switch-to-buffer buffer)
747 (while all
748 (split-window nil height)
749 (other-window 1)
750 (switch-to-buffer (car all))
751 (setq all (cdr all)))
752 ;; goto window we have started bs.
753 (other-window 1)))))
755 (defun bs-select-other-window ()
756 "Select current line's buffer by `switch-to-buffer-other-window'.
757 The window configuration before starting Buffer Selectin Menu will be restored
758 unless there is no other window. In this case a new window will be created.
759 Leave Buffer Selection Menu."
760 (interactive)
761 (let ((buffer (bs--current-buffer)))
762 (bury-buffer (current-buffer))
763 (set-window-configuration bs--window-config-coming-from)
764 (switch-to-buffer-other-window buffer)))
766 (defun bs-tmp-select-other-window ()
767 "Make the other window select this line's buffer.
768 The current window remains selected."
769 (interactive)
770 (let ((buffer (bs--current-buffer)))
771 (display-buffer buffer t)))
773 (defun bs-select-other-frame ()
774 "Select current line's buffer in new created frame.
775 Leave Buffer Selection Menu."
776 (interactive)
777 (let ((buffer (bs--current-buffer)))
778 (bury-buffer (current-buffer))
779 (set-window-configuration bs--window-config-coming-from)
780 (switch-to-buffer-other-frame buffer)))
782 (defun bs-mouse-select-other-frame (event)
783 "Select selected line's buffer in new created frame.
784 Leave Buffer Selection Menu.
785 EVENT: a mouse click EVENT."
786 (interactive "e")
787 (mouse-set-point event)
788 (bs-select-other-frame))
790 (defun bs-mouse-select (event)
791 "Select buffer on mouse click EVENT.
792 Select buffer by `bs-select'."
793 (interactive "e")
794 (mouse-set-point event)
795 (bs-select))
797 (defun bs-select-in-one-window ()
798 "Select current line's buffer in one window and delete other windows.
799 Leave Buffer Selection Menu."
800 (interactive)
801 (bs-select)
802 (delete-other-windows))
804 (defun bs-bury-buffer ()
805 "Bury buffer on current line."
806 (interactive)
807 (bury-buffer (bs--current-buffer))
808 (bs--redisplay t))
810 (defun bs-save ()
811 "Save buffer on current line."
812 (interactive)
813 (let ((buffer (bs--current-buffer)))
814 (save-excursion
815 (set-buffer buffer)
816 (save-buffer))
817 (bs--update-current-line)))
819 (defun bs-visit-tags-table ()
820 "Visit the tags table in the buffer on this line.
821 See `visit-tags-table'."
822 (interactive)
823 (let ((file (buffer-file-name (bs--current-buffer))))
824 (if file
825 (visit-tags-table file)
826 (error "Specified buffer has no file"))))
828 (defun bs-toggle-current-to-show ()
829 "Toggle status of showing flag for buffer in current line."
830 (interactive)
831 (let ((buffer (bs--current-buffer))
832 res)
833 (save-excursion
834 (set-buffer buffer)
835 (setq res (cond ((null bs-buffer-show-mark)
836 'never)
837 ((eq bs-buffer-show-mark 'never)
838 'always)
839 (t nil)))
840 (setq bs-buffer-show-mark res))
841 (bs--update-current-line)
842 (bs--set-window-height)
843 (bs--show-config-message res)))
845 (defun bs-set-current-buffer-to-show-always (&optional not-to-show-p)
846 "Toggle status of buffer on line to `always shown'.
847 NOT-TO-SHOW-P: prefix argument.
848 With no prefix argument the buffer on current line is marked to show
849 always. Otherwise it is marked to show never."
850 (interactive "P")
851 (if not-to-show-p
852 (bs-set-current-buffer-to-show-never)
853 (bs--set-toggle-to-show (bs--current-buffer) 'always)))
855 (defun bs-set-current-buffer-to-show-never ()
856 "Toggle status of buffer on line to `never shown'."
857 (interactive)
858 (bs--set-toggle-to-show (bs--current-buffer) 'never))
860 (defun bs--set-toggle-to-show (buffer what)
861 "Set value `bs-buffer-show-mark' of buffer BUFFER to WHAT.
862 Redisplay current line and display a message describing
863 the status of buffer on current line."
864 (with-current-buffer buffer (setq bs-buffer-show-mark what))
865 (bs--update-current-line)
866 (bs--set-window-height)
867 (bs--show-config-message what))
869 (defun bs-mark-current (count)
870 "Mark buffers.
871 COUNT is the number of buffers to mark.
872 Move cursor vertically down COUNT lines."
873 (interactive "p")
874 (let ((dir (if (> count 0) 1 -1))
875 (count (abs count)))
876 (while (> count 0)
877 (let ((buffer (bs--current-buffer)))
878 (if buffer
879 (setq bs--marked-buffers (cons buffer bs--marked-buffers)))
880 (bs--update-current-line)
881 (bs-down dir))
882 (setq count (1- count)))))
884 (defun bs-unmark-current (count)
885 "Unmark buffers.
886 COUNT is the number of buffers to unmark.
887 Move cursor vertically down COUNT lines."
888 (interactive "p")
889 (let ((dir (if (> count 0) 1 -1))
890 (count (abs count)))
891 (while (> count 0)
892 (let ((buffer (bs--current-buffer)))
893 (if buffer
894 (setq bs--marked-buffers (delq buffer bs--marked-buffers)))
895 (bs--update-current-line)
896 (bs-down dir))
897 (setq count (1- count)))))
899 (defun bs--show-config-message (what)
900 "Show message indicating the new showing status WHAT.
901 WHAT is a value of nil, `never', or `always'."
902 (bs-message-without-log (cond ((null what)
903 "Buffer will be shown normally.")
904 ((eq what 'never)
905 "Mark buffer to never be shown.")
906 (t "Mark buffer to show always."))))
908 (defun bs-delete ()
909 "Kill buffer on current line."
910 (interactive)
911 (let ((current (bs--current-buffer))
912 (inhibit-read-only t))
913 (unless (kill-buffer current)
914 (error "Buffer was not deleted"))
915 (setq bs-current-list (delq current bs-current-list))
916 (beginning-of-line)
917 (delete-region (point) (save-excursion
918 (end-of-line)
919 (if (eobp) (point) (1+ (point)))))
920 (if (eobp)
921 (progn
922 (backward-delete-char 1)
923 (beginning-of-line)
924 (recenter -1)))
925 (bs--set-window-height)))
927 (defun bs-delete-backward ()
928 "Like `bs-delete' but go to buffer in front of current."
929 (interactive)
930 (let ((on-last-line-p (save-excursion (end-of-line) (eobp))))
931 (bs-delete)
932 (unless on-last-line-p
933 (bs-up 1))))
935 (defun bs-show-sorted ()
936 "Show buffer list sorted by buffer name."
937 (interactive)
938 (setq bs--current-sort-function
939 (bs-next-config-aux (car bs--current-sort-function)
940 bs-sort-functions))
941 (bs--redisplay)
942 (bs--goto-current-buffer)
943 (bs-message-without-log "Sorted %s" (car bs--current-sort-function)))
945 (defun bs-apply-sort-faces (&optional sort-description)
946 "Set text properties for the sort described by SORT-DESCRIPTION.
947 SORT-DESCRIPTION is an element of `bs-sort-functions'.
948 Default is `bs--current-sort-function'."
949 (let ((sort-description (or sort-description
950 bs--current-sort-function)))
951 (save-excursion
952 (goto-char (point-min))
953 (if (and (nth 2 sort-description)
954 (search-forward-regexp (nth 2 sort-description) nil t))
955 (let ((inhibit-read-only t))
956 (put-text-property (match-beginning 0)
957 (match-end 0)
958 'face
959 (or (nth 3 sort-description)
960 'region)))))))
962 (defun bs-toggle-show-all ()
963 "Toggle show all buffers / show buffers with current configuration."
964 (interactive)
965 (setq bs--show-all (not bs--show-all))
966 (bs--redisplay)
967 (bs--goto-current-buffer)
968 (bs-message-without-log "%s" (bs--current-config-message)))
970 (defun bs-toggle-readonly ()
971 "Toggle read-only status for buffer on current line.
972 Uses function `vc-toggle-read-only'."
973 (interactive)
974 (let ((buffer (bs--current-buffer)))
975 (save-excursion
976 (set-buffer buffer)
977 (vc-toggle-read-only))
978 (bs--update-current-line)))
980 (defun bs-clear-modified ()
981 "Set modified flag for buffer on current line to nil."
982 (interactive)
983 (let ((buffer (bs--current-buffer)))
984 (save-excursion
985 (set-buffer buffer)
986 (set-buffer-modified-p nil)))
987 (bs--update-current-line))
989 (defun bs--nth-wrapper (count fun &rest args)
990 "Call COUNT times function FUN with arguments ARGS."
991 (setq count (or count 1))
992 (while (> count 0)
993 (apply fun args)
994 (setq count (1- count))))
996 (defun bs-up (arg)
997 "Move cursor vertically up ARG lines in Buffer Selection Menu."
998 (interactive "p")
999 (if (and arg (numberp arg) (< arg 0))
1000 (bs--nth-wrapper (- arg) 'bs--down)
1001 (bs--nth-wrapper arg 'bs--up)))
1003 (defun bs--up ()
1004 "Move cursor vertically up one line.
1005 If on top of buffer list go to last line."
1006 (interactive "p")
1007 (if (> (count-lines 1 (point)) bs-header-lines-length)
1008 (forward-line -1)
1009 (goto-char (point-max))
1010 (beginning-of-line)
1011 (recenter -1)))
1013 (defun bs-down (arg)
1014 "Move cursor vertically down ARG lines in Buffer Selection Menu."
1015 (interactive "p")
1016 (if (and arg (numberp arg) (< arg 0))
1017 (bs--nth-wrapper (- arg) 'bs--up)
1018 (bs--nth-wrapper arg 'bs--down)))
1020 (defun bs--down ()
1021 "Move cursor vertically down one line.
1022 If at end of buffer list go to first line."
1023 (if (eq (line-end-position) (point-max))
1024 (goto-line (1+ bs-header-lines-length))
1025 (forward-line 1)))
1027 (defun bs-visits-non-file (buffer)
1028 "Return t or nil whether BUFFER visits no file.
1029 A value of t means BUFFER belongs to no file.
1030 A value of nil means BUFFER belongs to a file."
1031 (not (buffer-file-name buffer)))
1033 (defun bs-sort-buffer-interns-are-last (b1 b2)
1034 "Function for sorting internal buffers B1 and B2 at the end of all buffers."
1037 ;; ----------------------------------------------------------------------
1038 ;; Configurations:
1039 ;; ----------------------------------------------------------------------
1041 (defun bs-config-clear ()
1042 "*Reset all variables which specify a configuration.
1043 These variables are `bs-dont-show-regexp', `bs-must-show-regexp',
1044 `bs-dont-show-function', `bs-must-show-function' and
1045 `bs-buffer-sort-function'."
1046 (setq bs-dont-show-regexp nil
1047 bs-must-show-regexp nil
1048 bs-dont-show-function nil
1049 bs-must-show-function nil
1050 bs-buffer-sort-function nil))
1052 (defun bs-config--only-files ()
1053 "Define a configuration for showing only buffers visiting a file."
1054 (bs-config-clear)
1055 (setq ;; I want to see *-buffers at the end
1056 bs-buffer-sort-function 'bs-sort-buffer-interns-are-last
1057 ;; Don't show files who don't belong to a file
1058 bs-dont-show-function 'bs-visits-non-file))
1060 (defun bs-config--files-and-scratch ()
1061 "Define a configuration for showing buffer *scratch* and file buffers."
1062 (bs-config-clear)
1063 (setq ;; I want to see *-buffers at the end
1064 bs-buffer-sort-function 'bs-sort-buffer-interns-are-last
1065 ;; Don't show files who don't belong to a file
1066 bs-dont-show-function 'bs-visits-non-file
1067 ;; Show *scratch* buffer.
1070 (defun bs-config--all ()
1071 "Define a configuration for showing all buffers.
1072 Reset all according variables by `bs-config-clear'."
1073 (bs-config-clear))
1075 (defun bs-config--all-intern-last ()
1076 "Define a configuration for showing all buffers.
1077 Internal buffers appear at end of all buffers."
1078 (bs-config-clear)
1079 ;; I want to see *-buffers at the end
1080 (setq bs-buffer-sort-function 'bs-sort-buffer-interns-are-last))
1082 (defun bs-set-configuration (name)
1083 "Set configuration to the one saved under string NAME in `bs-configurations'.
1084 When called interactively ask user for a configuration and apply selected
1085 configuration."
1086 (interactive (list (completing-read "Use configuration: "
1087 bs-configurations
1088 nil
1089 t)))
1090 (let ((list (assoc name bs-configurations)))
1091 (if list
1092 (if (listp list)
1093 (setq bs-current-configuration name
1094 bs-must-show-regexp (nth 1 list)
1095 bs-must-show-function (nth 2 list)
1096 bs-dont-show-regexp (nth 3 list)
1097 bs-dont-show-function (nth 4 list)
1098 bs-buffer-sort-function (nth 5 list))
1099 ;; for backward compability
1100 (funcall (cdr list)))
1101 ;; else
1102 (ding)
1103 (bs-message-without-log "No bs-configuration named %S." name))))
1105 (defun bs-help ()
1106 "Help for `bs-show'."
1107 (interactive)
1108 (describe-function 'bs-mode))
1110 (defun bs-next-config-aux (start-name list)
1111 "Get the next assoc after START-NAME in list LIST.
1112 Will return the first if START-NAME is at end."
1113 (let ((assocs list)
1114 (length (length list))
1115 pos)
1116 (while (and assocs (not pos))
1117 (if (string= (car (car assocs)) start-name)
1118 (setq pos (- length (length assocs))))
1119 (setq assocs (cdr assocs)))
1120 (setq pos (1+ pos))
1121 (if (eq pos length)
1122 (car list)
1123 (nth pos list))))
1125 (defun bs-next-config (name)
1126 "Return next configuration with respect to configuration with name NAME."
1127 (bs-next-config-aux name bs-configurations))
1129 (defun bs-select-next-configuration (&optional start-name)
1130 "Apply next configuration START-NAME and refresh buffer list.
1131 If START-NAME is nil the current configuration `bs-current-configuration'
1132 will be used."
1133 (interactive)
1134 (let ((config (bs-next-config (or start-name bs-current-configuration))))
1135 (bs-set-configuration (car config))
1136 (setq bs-default-configuration bs-current-configuration)
1137 (bs--redisplay t)
1138 (bs--set-window-height)
1139 (bs-message-without-log "Selected configuration: %s" (car config))))
1141 (defun bs-show-in-buffer (list)
1142 "Display buffer list LIST in buffer *buffer-selection*.
1143 Select buffer *buffer-selection* and display buffers according to current
1144 configuration `bs-current-configuration'. Set window height, fontify buffer
1145 and move point to current buffer."
1146 (setq bs-current-list list)
1147 (switch-to-buffer (get-buffer-create "*buffer-selection*"))
1148 (bs-mode)
1149 (let* ((inhibit-read-only t)
1150 (map-fun (lambda (entry)
1151 (length (buffer-name entry))))
1152 (max-length-of-names (apply 'max
1153 (cons 0 (mapcar map-fun list))))
1154 (name-entry-length (min bs-maximal-buffer-name-column
1155 (max bs-minimal-buffer-name-column
1156 max-length-of-names))))
1157 (erase-buffer)
1158 (setq bs--name-entry-length name-entry-length)
1159 (bs--show-header)
1160 (while list
1161 (bs--insert-one-entry (car list))
1163 (setq list (cdr list)))
1164 (delete-backward-char 1)
1165 (bs--set-window-height)
1166 (bs--goto-current-buffer)
1167 (font-lock-fontify-buffer)
1168 (bs-apply-sort-faces)
1169 (set-buffer-modified-p nil)))
1171 (defun bs-next-buffer (&optional buffer-list sorting-p)
1172 "Return next buffer and buffer list for buffer cycling in BUFFER-LIST.
1173 Ignore sorting when SORTING-P is nil.
1174 If BUFFER-LIST is nil the result of `bs-buffer-list' will be used as
1175 buffer list. The result is a cons of normally the second element of
1176 BUFFER-LIST and the buffer list used for buffer cycling."
1177 (let* ((bs--current-sort-function (if sorting-p
1178 bs--current-sort-function))
1179 (bs-buffer-list (or buffer-list (bs-buffer-list))))
1180 (cons (or (car (cdr bs-buffer-list))
1181 (car bs-buffer-list)
1182 (current-buffer))
1183 bs-buffer-list)))
1185 (defun bs-previous-buffer (&optional buffer-list sorting-p)
1186 "Return previous buffer and buffer list for buffer cycling in BUFFER-LIST.
1187 Ignore sorting when SORTING-P is nil.
1188 If BUFFER-LIST is nil the result of `bs-buffer-list' will be used as
1189 buffer list. The result is a cons of last element of BUFFER-LIST and the
1190 buffer list used for buffer cycling."
1191 (let* ((bs--current-sort-function (if sorting-p
1192 bs--current-sort-function))
1193 (bs-buffer-list (or buffer-list (bs-buffer-list))))
1194 (cons (or (car (last bs-buffer-list))
1195 (current-buffer))
1196 bs-buffer-list)))
1198 (defun bs-message-without-log (&rest args)
1199 "Like `message' but don't log it on the message log.
1200 All arguments ARGS are transferred to function `message'."
1201 (let ((message-log-max nil))
1202 (apply 'message args)))
1204 (defvar bs--cycle-list nil
1205 "Current buffer list used for cycling.")
1207 ;;;###autoload
1208 (defun bs-cycle-next ()
1209 "Select next buffer defined by buffer cycling.
1210 The buffers taking part in buffer cycling are defined
1211 by buffer configuration `bs-cycle-configuration-name'."
1212 (interactive)
1213 (let ((bs--buffer-coming-from (current-buffer))
1214 (bs-dont-show-regexp bs-dont-show-regexp)
1215 (bs-must-show-regexp bs-must-show-regexp)
1216 (bs-dont-show-function bs-dont-show-function)
1217 (bs-must-show-function bs-must-show-function)
1218 (bs--show-all nil))
1219 (bs-set-configuration (or bs-cycle-configuration-name bs-default-configuration))
1220 (let ((bs-buffer-sort-function nil)
1221 (bs--current-sort-function nil))
1222 (let* ((tupel (bs-next-buffer (if (or (eq last-command
1223 'bs-cycle-next)
1224 (eq last-command
1225 'bs-cycle-previous))
1226 bs--cycle-list)))
1227 (next (car tupel))
1228 (cycle-list (cdr tupel)))
1229 (setq bs--cycle-list (append (cdr cycle-list)
1230 (list (car cycle-list))))
1231 (bury-buffer)
1232 (switch-to-buffer next)
1233 (bs-message-without-log "Next buffers: %s"
1234 (or (cdr bs--cycle-list)
1235 "this buffer"))))))
1238 ;;;###autoload
1239 (defun bs-cycle-previous ()
1240 "Select previous buffer defined by buffer cycling.
1241 The buffers taking part in buffer cycling are defined
1242 by buffer configuration `bs-cycle-configuration-name'."
1243 (interactive)
1244 (let ((bs--buffer-coming-from (current-buffer))
1245 (bs-dont-show-regexp bs-dont-show-regexp)
1246 (bs-must-show-regexp bs-must-show-regexp)
1247 (bs-dont-show-function bs-dont-show-function)
1248 (bs-must-show-function bs-must-show-function)
1249 (bs--show-all nil))
1250 (bs-set-configuration (or bs-cycle-configuration-name bs-default-configuration))
1251 (let ((bs-buffer-sort-function nil)
1252 (bs--current-sort-function nil))
1253 (let* ((tupel (bs-previous-buffer (if (or (eq last-command
1254 'bs-cycle-next)
1255 (eq last-command
1256 'bs-cycle-previous))
1257 bs--cycle-list)))
1258 (prev-buffer (car tupel))
1259 (cycle-list (cdr tupel)))
1260 (setq bs--cycle-list (append (last cycle-list)
1261 (reverse (cdr (reverse cycle-list)))))
1262 (switch-to-buffer prev-buffer)
1263 (bs-message-without-log "Previous buffers: %s"
1264 (or (reverse (cdr bs--cycle-list))
1265 "this buffer"))))))
1267 (defun bs--get-value (fun &optional args)
1268 "Apply function FUN with arguments ARGS.
1269 Return result of evaluation. Will return FUN if FUN is a number
1270 or a string."
1271 (cond ((numberp fun)
1272 fun)
1273 ((stringp fun)
1274 fun)
1275 (t (apply fun args))))
1277 (defun bs--get-marked-string (start-buffer all-buffers)
1278 "Return a string which describes whether current buffer is marked.
1279 START-BUFFER is the buffer where we started buffer selection.
1280 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu.
1281 The result string is one of `bs-string-current', `bs-string-current-marked',
1282 `bs-string-marked', `bs-string-show-normally', `bs-string-show-never', or
1283 `bs-string-show-always'."
1284 (cond ;; current buffer is the buffer we started buffer selection.
1285 ((eq (current-buffer) start-buffer)
1286 (if (memq (current-buffer) bs--marked-buffers)
1287 bs-string-current-marked ; buffer is marked
1288 bs-string-current))
1289 ;; current buffer is marked
1290 ((memq (current-buffer) bs--marked-buffers)
1291 bs-string-marked)
1292 ;; current buffer hasn't a special mark.
1293 ((null bs-buffer-show-mark)
1294 bs-string-show-normally)
1295 ;; current buffer has a mark not to show itself.
1296 ((eq bs-buffer-show-mark 'never)
1297 bs-string-show-never)
1298 ;; otherwise current buffer is marked to show always.
1299 (t
1300 bs-string-show-always)))
1302 (defun bs--get-modified-string (start-buffer all-buffers)
1303 "Return a string which describes whether current buffer is modified.
1304 START-BUFFER is the buffer where we started buffer selection.
1305 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu."
1306 (if (buffer-modified-p) "*" " "))
1308 (defun bs--get-readonly-string (start-buffer all-buffers)
1309 "Return a string which describes whether current buffer is read only.
1310 START-BUFFER is the buffer where we started buffer selection.
1311 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu."
1312 (if buffer-read-only "%" " "))
1314 (defun bs--get-size-string (start-buffer all-buffers)
1315 "Return a string which describes the size of current buffer.
1316 START-BUFFER is the buffer where we started buffer selection.
1317 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu."
1318 (int-to-string (buffer-size)))
1320 (defun bs--get-name (start-buffer all-buffers)
1321 "Return name of current buffer for Buffer Selection Menu.
1322 The name of current buffer gets additional text properties
1323 for mouse highlighting.
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 (propertize (buffer-name)
1327 'help-echo "mouse-2: select this buffer, mouse-3: select in other frame"
1328 'mouse-face 'highlight))
1330 (defun bs--get-mode-name (start-buffer all-buffers)
1331 "Return the name of mode of current buffer for Buffer Selection Menu.
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 mode-name)
1336 (defun bs--get-file-name (start-buffer all-buffers)
1337 "Return string for column 'File' in Buffer Selection Menu.
1338 This is the variable `buffer-file-name' of current buffer.
1339 If current mode is `dired-mode' or `shell-mode' it returns the
1340 default directory.
1341 START-BUFFER is the buffer where we started buffer selection.
1342 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu."
1343 (propertize (if (member major-mode '(shell-mode dired-mode))
1344 default-directory
1345 (or buffer-file-name ""))
1346 'mouse-face 'highlight
1347 'help-echo "mouse-2: select this buffer, mouse-3: select in other frame"))
1349 (defun bs--insert-one-entry (buffer)
1350 "Generate one entry for buffer BUFFER in Buffer Selection Menu.
1351 It goes over all columns described in `bs-attributes-list'
1352 and evaluates corresponding string. Inserts string in current buffer;
1353 normally *buffer-selection*."
1354 (let ((string "")
1355 (columns bs-attributes-list)
1356 (to-much 0)
1357 (apply-args (append (list bs--buffer-coming-from bs-current-list))))
1358 (save-excursion
1359 (while columns
1360 (set-buffer buffer)
1361 (let ((min (bs--get-value (nth 1 (car columns))))
1362 ;;(max (bs--get-value (nth 2 (car columns)))) refered no more
1363 (align (nth 3 (car columns)))
1364 (fun (nth 4 (car columns)))
1365 (val nil)
1366 new-string)
1367 (setq val (bs--get-value fun apply-args))
1368 (setq new-string (bs--format-aux val align (- min to-much)))
1369 (setq string (concat string new-string))
1370 (if (> (length new-string) min)
1371 (setq to-much (- (length new-string) min)))
1372 ) ; let
1373 (setq columns (cdr columns))))
1374 (insert string)
1375 string))
1377 (defun bs--format-aux (string align len)
1378 "Generate a string with STRING with alignment ALIGN and length LEN.
1379 ALIGN is one of the symbols `left', `middle', or `right'."
1380 (let* ((width (length string))
1381 (len (max len width)))
1382 (format (format "%%%s%ds" (if (eq align 'right) "" "-") len)
1383 (if (eq align 'middle)
1384 (concat (make-string (/ (- len width) 2) ?\s) string)
1385 string))))
1387 (defun bs--show-header ()
1388 "Insert header for Buffer Selection Menu in current buffer."
1389 (mapcar '(lambda (string)
1391 (bs--create-header)))
1393 (defun bs--get-name-length ()
1394 "Return value of `bs--name-entry-length'."
1395 bs--name-entry-length)
1397 (defun bs--create-header ()
1398 "Return all header lines used in Buffer Selection Menu as a list of strings."
1399 (list (mapconcat (lambda (column)
1400 (bs--format-aux (bs--get-value (car column))
1401 (nth 3 column) ; align
1402 (bs--get-value (nth 1 column))))
1403 bs-attributes-list
1404 "")
1405 (mapconcat (lambda (column)
1406 (let ((length (length (bs--get-value (car column)))))
1407 (bs--format-aux (make-string length ?-)
1408 (nth 3 column) ; align
1409 (bs--get-value (nth 1 column)))))
1410 bs-attributes-list
1411 "")))
1413 (defun bs--show-with-configuration (name &optional arg)
1414 "Display buffer list of configuration with name NAME.
1415 Set configuration NAME and determine window for Buffer Selection Menu.
1416 Unless current buffer is buffer *buffer-selection* we have to save
1417 the buffer we started Buffer Selection Menu and the current window
1418 configuration to restore buffer and window configuration after a
1419 selection. If there is already a window displaying *buffer-selection*
1420 select this window for Buffer Selection Menu. Otherwise open a new
1421 window.
1422 The optional argument ARG is the prefix argument when calling a function
1423 for buffer selection."
1424 (bs-set-configuration name)
1425 (let ((bs--show-all (or bs--show-all arg)))
1426 (unless (string= "*buffer-selection*" (buffer-name))
1427 ;; Only when not in buffer *buffer-selection*
1428 ;; we have to set the buffer we started the command
1429 (progn
1430 (setq bs--buffer-coming-from (current-buffer))
1431 (setq bs--window-config-coming-from (current-window-configuration))))
1432 (let ((liste (bs-buffer-list))
1433 (active-window (bs--window-for-buffer "*buffer-selection*")))
1434 (if active-window
1435 (select-window active-window)
1436 (if (> (window-height (selected-window)) 7)
1437 (progn
1438 (split-window-vertically)
1439 (other-window 1))))
1440 (bs-show-in-buffer liste)
1441 (bs-message-without-log "%s" (bs--current-config-message)))))
1443 (defun bs--configuration-name-for-prefix-arg (prefix-arg)
1444 "Convert prefix argument PREFIX-ARG to a name of a buffer configuration.
1445 If PREFIX-ARG is nil return `bs-default-configuration'.
1446 If PREFIX-ARG is an integer return PREFIX-ARG element of `bs-configurations'.
1447 Otherwise return `bs-alternative-configuration'."
1448 (cond ;; usually activation
1449 ((null prefix-arg)
1450 bs-default-configuration)
1451 ;; call with integer as prefix argument
1452 ((integerp prefix-arg)
1453 (if (and (< 0 prefix-arg) (<= prefix-arg (length bs-configurations)))
1454 (car (nth (1- prefix-arg) bs-configurations))
1455 bs-default-configuration))
1456 ;; call by prefix argument C-u
1457 (t bs-alternative-configuration)))
1459 ;; ----------------------------------------------------------------------
1460 ;; Main function bs-customize and bs-show
1461 ;; ----------------------------------------------------------------------
1463 ;;;###autoload
1464 (defun bs-customize ()
1465 "Customization of group bs for Buffer Selection Menu."
1466 (interactive)
1467 (customize-group "bs"))
1469 ;;;###autoload
1470 (defun bs-show (arg)
1471 "Make a menu of buffers so you can manipulate buffers or the buffer list.
1473 There are many key commands similar to `Buffer-menu-mode' for
1474 manipulating buffer list and buffers itself.
1475 User can move with [up] or [down], select a buffer
1479 With prefix argument ARG show a different buffer list. Function
1480 `bs--configuration-name-for-prefix-arg' determine accordingly
1481 name of buffer configuration."
1482 (interactive "P")
1483 (setq bs--marked-buffers nil)
1484 (bs--show-with-configuration (bs--configuration-name-for-prefix-arg arg)))
1486 ;; Now provide feature bs
1487 (provide 'bs)
1489 ;;; arch-tag: c0d9ab34-bf06-4368-ae9d-af88878e6802
1490 ;;; bs.el ends here