| blob | bdeb00f58049cd2c206cf718041d5f7ea7963062 |
1 ;;; bs.el --- menu for selecting and displaying buffers
3 ;; Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004,
4 ;; 2005 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 (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-mode-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 (fit-window-to-buffer (selected-window) bs-max-window-height)))
703 (defun bs--current-buffer ()
704 "Return buffer on current line.
705 Raise an error if not on a buffer line."
706 (beginning-of-line)
707 (let ((line (+ (- bs-header-lines-length)
708 (count-lines 1 (point)))))
709 (if (< line 0)
710 (error "You are on a header row"))
711 (nth line bs-current-list)))
713 (defun bs--update-current-line ()
714 "Update the entry on current line for Buffer Selection Menu."
715 (let ((buffer (bs--current-buffer))
716 (inhibit-read-only t))
717 (beginning-of-line)
718 (delete-region (point) (line-end-position))
719 (bs--insert-one-entry buffer)
720 (beginning-of-line)))
722 (defun bs-view ()
723 "View current line's buffer in View mode.
724 Leave Buffer Selection Menu."
725 (interactive)
726 (view-buffer (bs--current-buffer)))
728 (defun bs-select ()
729 "Select current line's buffer and other marked buffers.
730 If there are no marked buffers the window configuration before starting
731 Buffer Selectin Menu will be restored.
732 If there are marked buffers each marked buffer and the current line's buffer
733 will be selected in a window.
734 Leave Buffer Selection Menu."
735 (interactive)
736 (let ((buffer (bs--current-buffer)))
737 (bury-buffer (current-buffer))
738 (set-window-configuration bs--window-config-coming-from)
739 (switch-to-buffer buffer)
740 (if bs--marked-buffers
741 ;; Some marked buffers for selection
742 (let* ((all (delq buffer bs--marked-buffers))
743 (height (/ (1- (frame-height)) (1+ (length all)))))
744 (delete-other-windows)
745 (switch-to-buffer buffer)
746 (while all
747 (split-window nil height)
748 (other-window 1)
749 (switch-to-buffer (car all))
750 (setq all (cdr all)))
751 ;; goto window we have started bs.
752 (other-window 1)))))
754 (defun bs-select-other-window ()
755 "Select current line's buffer by `switch-to-buffer-other-window'.
756 The window configuration before starting Buffer Selectin Menu will be restored
757 unless there is no other window. In this case a new window will be created.
758 Leave Buffer Selection Menu."
759 (interactive)
760 (let ((buffer (bs--current-buffer)))
761 (bury-buffer (current-buffer))
762 (set-window-configuration bs--window-config-coming-from)
763 (switch-to-buffer-other-window buffer)))
765 (defun bs-tmp-select-other-window ()
766 "Make the other window select this line's buffer.
767 The current window remains selected."
768 (interactive)
769 (let ((buffer (bs--current-buffer)))
770 (display-buffer buffer t)))
772 (defun bs-select-other-frame ()
773 "Select current line's buffer in new created frame.
774 Leave Buffer Selection Menu."
775 (interactive)
776 (let ((buffer (bs--current-buffer)))
777 (bury-buffer (current-buffer))
778 (set-window-configuration bs--window-config-coming-from)
779 (switch-to-buffer-other-frame buffer)))
781 (defun bs-mouse-select-other-frame (event)
782 "Select selected line's buffer in new created frame.
783 Leave Buffer Selection Menu.
784 EVENT: a mouse click EVENT."
785 (interactive "e")
786 (mouse-set-point event)
787 (bs-select-other-frame))
789 (defun bs-mouse-select (event)
790 "Select buffer on mouse click EVENT.
791 Select buffer by `bs-select'."
792 (interactive "e")
793 (mouse-set-point event)
794 (bs-select))
796 (defun bs-select-in-one-window ()
797 "Select current line's buffer in one window and delete other windows.
798 Leave Buffer Selection Menu."
799 (interactive)
800 (bs-select)
801 (delete-other-windows))
803 (defun bs-bury-buffer ()
804 "Bury buffer on current line."
805 (interactive)
806 (bury-buffer (bs--current-buffer))
807 (bs--redisplay t))
809 (defun bs-save ()
810 "Save buffer on current line."
811 (interactive)
812 (let ((buffer (bs--current-buffer)))
813 (save-excursion
814 (set-buffer buffer)
815 (save-buffer))
816 (bs--update-current-line)))
818 (defun bs-visit-tags-table ()
819 "Visit the tags table in the buffer on this line.
820 See `visit-tags-table'."
821 (interactive)
822 (let ((file (buffer-file-name (bs--current-buffer))))
823 (if file
824 (visit-tags-table file)
825 (error "Specified buffer has no file"))))
827 (defun bs-toggle-current-to-show ()
828 "Toggle status of showing flag for buffer in current line."
829 (interactive)
830 (let ((buffer (bs--current-buffer))
831 res)
832 (save-excursion
833 (set-buffer buffer)
834 (setq res (cond ((null bs-buffer-show-mark)
835 'never)
836 ((eq bs-buffer-show-mark 'never)
837 'always)
838 (t nil)))
839 (setq bs-buffer-show-mark res))
840 (bs--update-current-line)
841 (bs--set-window-height)
842 (bs--show-config-message res)))
844 (defun bs-set-current-buffer-to-show-always (&optional not-to-show-p)
845 "Toggle status of buffer on line to `always shown'.
846 NOT-TO-SHOW-P: prefix argument.
847 With no prefix argument the buffer on current line is marked to show
848 always. Otherwise it is marked to show never."
849 (interactive "P")
850 (if not-to-show-p
851 (bs-set-current-buffer-to-show-never)
852 (bs--set-toggle-to-show (bs--current-buffer) 'always)))
854 (defun bs-set-current-buffer-to-show-never ()
855 "Toggle status of buffer on line to `never shown'."
856 (interactive)
857 (bs--set-toggle-to-show (bs--current-buffer) 'never))
859 (defun bs--set-toggle-to-show (buffer what)
860 "Set value `bs-buffer-show-mark' of buffer BUFFER to WHAT.
861 Redisplay current line and display a message describing
862 the status of buffer on current line."
863 (with-current-buffer buffer (setq bs-buffer-show-mark what))
864 (bs--update-current-line)
865 (bs--set-window-height)
866 (bs--show-config-message what))
868 (defun bs-mark-current (count)
869 "Mark buffers.
870 COUNT is the number of buffers to mark.
871 Move cursor vertically down COUNT lines."
872 (interactive "p")
873 (let ((dir (if (> count 0) 1 -1))
874 (count (abs count)))
875 (while (> count 0)
876 (let ((buffer (bs--current-buffer)))
877 (if buffer
878 (setq bs--marked-buffers (cons buffer bs--marked-buffers)))
879 (bs--update-current-line)
880 (bs-down dir))
881 (setq count (1- count)))))
883 (defun bs-unmark-current (count)
884 "Unmark buffers.
885 COUNT is the number of buffers to unmark.
886 Move cursor vertically down COUNT lines."
887 (interactive "p")
888 (let ((dir (if (> count 0) 1 -1))
889 (count (abs count)))
890 (while (> count 0)
891 (let ((buffer (bs--current-buffer)))
892 (if buffer
893 (setq bs--marked-buffers (delq buffer bs--marked-buffers)))
894 (bs--update-current-line)
895 (bs-down dir))
896 (setq count (1- count)))))
898 (defun bs--show-config-message (what)
899 "Show message indicating the new showing status WHAT.
900 WHAT is a value of nil, `never', or `always'."
901 (bs-message-without-log (cond ((null what)
902 "Buffer will be shown normally.")
903 ((eq what 'never)
904 "Mark buffer to never be shown.")
905 (t "Mark buffer to show always."))))
907 (defun bs-delete ()
908 "Kill buffer on current line."
909 (interactive)
910 (let ((current (bs--current-buffer))
911 (inhibit-read-only t))
912 (unless (kill-buffer current)
913 (error "Buffer was not deleted"))
914 (setq bs-current-list (delq current bs-current-list))
915 (beginning-of-line)
916 (delete-region (point) (save-excursion
917 (end-of-line)
918 (if (eobp) (point) (1+ (point)))))
919 (if (eobp)
920 (progn
921 (backward-delete-char 1)
922 (beginning-of-line)
923 (recenter -1)))
924 (bs--set-window-height)))
926 (defun bs-delete-backward ()
927 "Like `bs-delete' but go to buffer in front of current."
928 (interactive)
929 (let ((on-last-line-p (save-excursion (end-of-line) (eobp))))
930 (bs-delete)
931 (unless on-last-line-p
932 (bs-up 1))))
934 (defun bs-show-sorted ()
935 "Show buffer list sorted by buffer name."
936 (interactive)
937 (setq bs--current-sort-function
938 (bs-next-config-aux (car bs--current-sort-function)
939 bs-sort-functions))
940 (bs--redisplay)
941 (bs--goto-current-buffer)
942 (bs-message-without-log "Sorted %s" (car bs--current-sort-function)))
944 (defun bs-apply-sort-faces (&optional sort-description)
945 "Set text properties for the sort described by SORT-DESCRIPTION.
946 SORT-DESCRIPTION is an element of `bs-sort-functions'.
947 Default is `bs--current-sort-function'."
948 (let ((sort-description (or sort-description
949 bs--current-sort-function)))
950 (save-excursion
951 (goto-char (point-min))
952 (if (and (nth 2 sort-description)
953 (search-forward-regexp (nth 2 sort-description) nil t))
954 (let ((inhibit-read-only t))
955 (put-text-property (match-beginning 0)
956 (match-end 0)
957 'face
958 (or (nth 3 sort-description)
959 'region)))))))
961 (defun bs-toggle-show-all ()
962 "Toggle show all buffers / show buffers with current configuration."
963 (interactive)
964 (setq bs--show-all (not bs--show-all))
965 (bs--redisplay)
966 (bs--goto-current-buffer)
967 (bs-message-without-log "%s" (bs--current-config-message)))
969 (defun bs-toggle-readonly ()
970 "Toggle read-only status for buffer on current line.
971 Uses function `vc-toggle-read-only'."
972 (interactive)
973 (let ((buffer (bs--current-buffer)))
974 (save-excursion
975 (set-buffer buffer)
976 (vc-toggle-read-only))
977 (bs--update-current-line)))
979 (defun bs-clear-modified ()
980 "Set modified flag for buffer on current line to nil."
981 (interactive)
982 (let ((buffer (bs--current-buffer)))
983 (save-excursion
984 (set-buffer buffer)
985 (set-buffer-modified-p nil)))
986 (bs--update-current-line))
988 (defun bs--nth-wrapper (count fun &rest args)
989 "Call COUNT times function FUN with arguments ARGS."
990 (setq count (or count 1))
991 (while (> count 0)
992 (apply fun args)
993 (setq count (1- count))))
995 (defun bs-up (arg)
996 "Move cursor vertically up ARG lines in Buffer Selection Menu."
997 (interactive "p")
998 (if (and arg (numberp arg) (< arg 0))
999 (bs--nth-wrapper (- arg) 'bs--down)
1000 (bs--nth-wrapper arg 'bs--up)))
1002 (defun bs--up ()
1003 "Move cursor vertically up one line.
1004 If on top of buffer list go to last line."
1005 (interactive "p")
1006 (if (> (count-lines 1 (point)) bs-header-lines-length)
1007 (forward-line -1)
1008 (goto-char (point-max))
1009 (beginning-of-line)
1010 (recenter -1)))
1012 (defun bs-down (arg)
1013 "Move cursor vertically down ARG lines in Buffer Selection Menu."
1014 (interactive "p")
1015 (if (and arg (numberp arg) (< arg 0))
1016 (bs--nth-wrapper (- arg) 'bs--up)
1017 (bs--nth-wrapper arg 'bs--down)))
1019 (defun bs--down ()
1020 "Move cursor vertically down one line.
1021 If at end of buffer list go to first line."
1022 (if (eq (line-end-position) (point-max))
1023 (goto-line (1+ bs-header-lines-length))
1024 (forward-line 1)))
1026 (defun bs-visits-non-file (buffer)
1027 "Return t or nil whether BUFFER visits no file.
1028 A value of t means BUFFER belongs to no file.
1029 A value of nil means BUFFER belongs to a file."
1030 (not (buffer-file-name buffer)))
1032 (defun bs-sort-buffer-interns-are-last (b1 b2)
1033 "Function for sorting internal buffers B1 and B2 at the end of all buffers."
1036 ;; ----------------------------------------------------------------------
1037 ;; Configurations:
1038 ;; ----------------------------------------------------------------------
1040 (defun bs-config-clear ()
1041 "*Reset all variables which specify a configuration.
1042 These variables are `bs-dont-show-regexp', `bs-must-show-regexp',
1043 `bs-dont-show-function', `bs-must-show-function' and
1044 `bs-buffer-sort-function'."
1045 (setq bs-dont-show-regexp nil
1046 bs-must-show-regexp nil
1047 bs-dont-show-function nil
1048 bs-must-show-function nil
1049 bs-buffer-sort-function nil))
1051 (defun bs-config--only-files ()
1052 "Define a configuration for showing only buffers visiting a file."
1053 (bs-config-clear)
1054 (setq ;; I want to see *-buffers at the end
1055 bs-buffer-sort-function 'bs-sort-buffer-interns-are-last
1056 ;; Don't show files who don't belong to a file
1057 bs-dont-show-function 'bs-visits-non-file))
1059 (defun bs-config--files-and-scratch ()
1060 "Define a configuration for showing buffer *scratch* and file buffers."
1061 (bs-config-clear)
1062 (setq ;; I want to see *-buffers at the end
1063 bs-buffer-sort-function 'bs-sort-buffer-interns-are-last
1064 ;; Don't show files who don't belong to a file
1065 bs-dont-show-function 'bs-visits-non-file
1066 ;; Show *scratch* buffer.
1069 (defun bs-config--all ()
1070 "Define a configuration for showing all buffers.
1071 Reset all according variables by `bs-config-clear'."
1072 (bs-config-clear))
1074 (defun bs-config--all-intern-last ()
1075 "Define a configuration for showing all buffers.
1076 Internal buffers appear at end of all buffers."
1077 (bs-config-clear)
1078 ;; I want to see *-buffers at the end
1079 (setq bs-buffer-sort-function 'bs-sort-buffer-interns-are-last))
1081 (defun bs-set-configuration (name)
1082 "Set configuration to the one saved under string NAME in `bs-configurations'.
1083 When called interactively ask user for a configuration and apply selected
1084 configuration."
1085 (interactive (list (completing-read "Use configuration: "
1086 bs-configurations
1087 nil
1088 t)))
1089 (let ((list (assoc name bs-configurations)))
1090 (if list
1091 (if (listp list)
1092 (setq bs-current-configuration name
1093 bs-must-show-regexp (nth 1 list)
1094 bs-must-show-function (nth 2 list)
1095 bs-dont-show-regexp (nth 3 list)
1096 bs-dont-show-function (nth 4 list)
1097 bs-buffer-sort-function (nth 5 list))
1098 ;; for backward compability
1099 (funcall (cdr list)))
1100 ;; else
1101 (ding)
1102 (bs-message-without-log "No bs-configuration named %S." name))))
1104 (defun bs-help ()
1105 "Help for `bs-show'."
1106 (interactive)
1107 (describe-function 'bs-mode))
1109 (defun bs-next-config-aux (start-name list)
1110 "Get the next assoc after START-NAME in list LIST.
1111 Will return the first if START-NAME is at end."
1112 (let ((assocs list)
1113 (length (length list))
1114 pos)
1115 (while (and assocs (not pos))
1116 (if (string= (car (car assocs)) start-name)
1117 (setq pos (- length (length assocs))))
1118 (setq assocs (cdr assocs)))
1119 (setq pos (1+ pos))
1120 (if (eq pos length)
1121 (car list)
1122 (nth pos list))))
1124 (defun bs-next-config (name)
1125 "Return next configuration with respect to configuration with name NAME."
1126 (bs-next-config-aux name bs-configurations))
1128 (defun bs-select-next-configuration (&optional start-name)
1129 "Apply next configuration START-NAME and refresh buffer list.
1130 If START-NAME is nil the current configuration `bs-current-configuration'
1131 will be used."
1132 (interactive)
1133 (let ((config (bs-next-config (or start-name bs-current-configuration))))
1134 (bs-set-configuration (car config))
1135 (setq bs-default-configuration bs-current-configuration)
1136 (bs--redisplay t)
1137 (bs--set-window-height)
1138 (bs-message-without-log "Selected configuration: %s" (car config))))
1140 (defun bs-show-in-buffer (list)
1141 "Display buffer list LIST in buffer *buffer-selection*.
1142 Select buffer *buffer-selection* and display buffers according to current
1143 configuration `bs-current-configuration'. Set window height, fontify buffer
1144 and move point to current buffer."
1145 (setq bs-current-list list)
1146 (switch-to-buffer (get-buffer-create "*buffer-selection*"))
1147 (bs-mode)
1148 (let* ((inhibit-read-only t)
1149 (map-fun (lambda (entry)
1150 (length (buffer-name entry))))
1151 (max-length-of-names (apply 'max
1152 (cons 0 (mapcar map-fun list))))
1153 (name-entry-length (min bs-maximal-buffer-name-column
1154 (max bs-minimal-buffer-name-column
1155 max-length-of-names))))
1156 (erase-buffer)
1157 (setq bs--name-entry-length name-entry-length)
1158 (bs--show-header)
1159 (while list
1160 (bs--insert-one-entry (car list))
1162 (setq list (cdr list)))
1163 (delete-backward-char 1)
1164 (bs--set-window-height)
1165 (bs--goto-current-buffer)
1166 (font-lock-fontify-buffer)
1167 (bs-apply-sort-faces)))
1169 (defun bs-next-buffer (&optional buffer-list sorting-p)
1170 "Return next buffer and buffer list for buffer cycling in BUFFER-LIST.
1171 Ignore sorting when SORTING-P is nil.
1172 If BUFFER-LIST is nil the result of `bs-buffer-list' will be used as
1173 buffer list. The result is a cons of normally the second element of
1174 BUFFER-LIST and the buffer list used for buffer cycling."
1175 (let* ((bs--current-sort-function (if sorting-p
1176 bs--current-sort-function))
1177 (bs-buffer-list (or buffer-list (bs-buffer-list))))
1178 (cons (or (car (cdr bs-buffer-list))
1179 (car bs-buffer-list)
1180 (current-buffer))
1181 bs-buffer-list)))
1183 (defun bs-previous-buffer (&optional buffer-list sorting-p)
1184 "Return previous buffer and buffer list for buffer cycling in BUFFER-LIST.
1185 Ignore sorting when SORTING-P is nil.
1186 If BUFFER-LIST is nil the result of `bs-buffer-list' will be used as
1187 buffer list. The result is a cons of last element of BUFFER-LIST and the
1188 buffer list used for buffer cycling."
1189 (let* ((bs--current-sort-function (if sorting-p
1190 bs--current-sort-function))
1191 (bs-buffer-list (or buffer-list (bs-buffer-list))))
1192 (cons (or (car (last bs-buffer-list))
1193 (current-buffer))
1194 bs-buffer-list)))
1196 (defun bs-message-without-log (&rest args)
1197 "Like `message' but don't log it on the message log.
1198 All arguments ARGS are transferred to function `message'."
1199 (let ((message-log-max nil))
1200 (apply 'message args)))
1202 (defvar bs--cycle-list nil
1203 "Current buffer list used for cycling.")
1205 ;;;###autoload
1206 (defun bs-cycle-next ()
1207 "Select next buffer defined by buffer cycling.
1208 The buffers taking part in buffer cycling are defined
1209 by buffer configuration `bs-cycle-configuration-name'."
1210 (interactive)
1211 (let ((bs--buffer-coming-from (current-buffer))
1212 (bs-dont-show-regexp bs-dont-show-regexp)
1213 (bs-must-show-regexp bs-must-show-regexp)
1214 (bs-dont-show-function bs-dont-show-function)
1215 (bs-must-show-function bs-must-show-function)
1216 (bs--show-all nil))
1217 (bs-set-configuration (or bs-cycle-configuration-name bs-default-configuration))
1218 (let ((bs-buffer-sort-function nil)
1219 (bs--current-sort-function nil))
1220 (let* ((tupel (bs-next-buffer (if (or (eq last-command
1221 'bs-cycle-next)
1222 (eq last-command
1223 'bs-cycle-previous))
1224 bs--cycle-list)))
1225 (next (car tupel))
1226 (cycle-list (cdr tupel)))
1227 (setq bs--cycle-list (append (cdr cycle-list)
1228 (list (car cycle-list))))
1229 (bury-buffer)
1230 (switch-to-buffer next)
1231 (bs-message-without-log "Next buffers: %s"
1232 (or (cdr bs--cycle-list)
1233 "this buffer"))))))
1236 ;;;###autoload
1237 (defun bs-cycle-previous ()
1238 "Select previous buffer defined by buffer cycling.
1239 The buffers taking part in buffer cycling are defined
1240 by buffer configuration `bs-cycle-configuration-name'."
1241 (interactive)
1242 (let ((bs--buffer-coming-from (current-buffer))
1243 (bs-dont-show-regexp bs-dont-show-regexp)
1244 (bs-must-show-regexp bs-must-show-regexp)
1245 (bs-dont-show-function bs-dont-show-function)
1246 (bs-must-show-function bs-must-show-function)
1247 (bs--show-all nil))
1248 (bs-set-configuration (or bs-cycle-configuration-name bs-default-configuration))
1249 (let ((bs-buffer-sort-function nil)
1250 (bs--current-sort-function nil))
1251 (let* ((tupel (bs-previous-buffer (if (or (eq last-command
1252 'bs-cycle-next)
1253 (eq last-command
1254 'bs-cycle-previous))
1255 bs--cycle-list)))
1256 (prev-buffer (car tupel))
1257 (cycle-list (cdr tupel)))
1258 (setq bs--cycle-list (append (last cycle-list)
1259 (reverse (cdr (reverse cycle-list)))))
1260 (switch-to-buffer prev-buffer)
1261 (bs-message-without-log "Previous buffers: %s"
1262 (or (reverse (cdr bs--cycle-list))
1263 "this buffer"))))))
1265 (defun bs--get-value (fun &optional args)
1266 "Apply function FUN with arguments ARGS.
1267 Return result of evaluation. Will return FUN if FUN is a number
1268 or a string."
1269 (cond ((numberp fun)
1270 fun)
1271 ((stringp fun)
1272 fun)
1273 (t (apply fun args))))
1275 (defun bs--get-marked-string (start-buffer all-buffers)
1276 "Return a string which describes whether current buffer is marked.
1277 START-BUFFER is the buffer where we started buffer selection.
1278 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu.
1279 The result string is one of `bs-string-current', `bs-string-current-marked',
1280 `bs-string-marked', `bs-string-show-normally', `bs-string-show-never', or
1281 `bs-string-show-always'."
1282 (cond ;; current buffer is the buffer we started buffer selection.
1283 ((eq (current-buffer) start-buffer)
1284 (if (memq (current-buffer) bs--marked-buffers)
1285 bs-string-current-marked ; buffer is marked
1286 bs-string-current))
1287 ;; current buffer is marked
1288 ((memq (current-buffer) bs--marked-buffers)
1289 bs-string-marked)
1290 ;; current buffer hasn't a special mark.
1291 ((null bs-buffer-show-mark)
1292 bs-string-show-normally)
1293 ;; current buffer has a mark not to show itself.
1294 ((eq bs-buffer-show-mark 'never)
1295 bs-string-show-never)
1296 ;; otherwise current buffer is marked to show always.
1297 (t
1298 bs-string-show-always)))
1300 (defun bs--get-modified-string (start-buffer all-buffers)
1301 "Return a string which describes whether current buffer is modified.
1302 START-BUFFER is the buffer where we started buffer selection.
1303 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu."
1304 (if (buffer-modified-p) "*" " "))
1306 (defun bs--get-readonly-string (start-buffer all-buffers)
1307 "Return a string which describes whether current buffer is read only.
1308 START-BUFFER is the buffer where we started buffer selection.
1309 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu."
1310 (if buffer-read-only "%" " "))
1312 (defun bs--get-size-string (start-buffer all-buffers)
1313 "Return a string which describes the size of current buffer.
1314 START-BUFFER is the buffer where we started buffer selection.
1315 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu."
1316 (int-to-string (buffer-size)))
1318 (defun bs--get-name (start-buffer all-buffers)
1319 "Return name of current buffer for Buffer Selection Menu.
1320 The name of current buffer gets additional text properties
1321 for mouse highlighting.
1322 START-BUFFER is the buffer where we started buffer selection.
1323 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu."
1324 (propertize (buffer-name)
1325 'help-echo "mouse-2: select this buffer, mouse-3: select in other frame"
1326 'mouse-face 'highlight))
1328 (defun bs--get-mode-name (start-buffer all-buffers)
1329 "Return the name of mode of current buffer for Buffer Selection Menu.
1330 START-BUFFER is the buffer where we started buffer selection.
1331 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu."
1332 mode-name)
1334 (defun bs--get-file-name (start-buffer all-buffers)
1335 "Return string for column 'File' in Buffer Selection Menu.
1336 This is the variable `buffer-file-name' of current buffer.
1337 If current mode is `dired-mode' or `shell-mode' it returns the
1338 default directory.
1339 START-BUFFER is the buffer where we started buffer selection.
1340 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu."
1341 (let ((string (copy-sequence (if (member major-mode
1342 '(shell-mode dired-mode))
1343 default-directory
1344 (or buffer-file-name "")))))
1345 (add-text-properties
1346 0 (length string)
1347 '(mouse-face highlight
1348 help-echo "mouse-2: select this buffer, mouse-3: select in other frame")
1349 string)
1350 string))
1352 (defun bs--insert-one-entry (buffer)
1353 "Generate one entry for buffer BUFFER in Buffer Selection Menu.
1354 It goes over all columns described in `bs-attributes-list'
1355 and evaluates corresponding string. Inserts string in current buffer;
1356 normally *buffer-selection*."
1357 (let ((string "")
1358 (columns bs-attributes-list)
1359 (to-much 0)
1360 (apply-args (append (list bs--buffer-coming-from bs-current-list))))
1361 (save-excursion
1362 (while columns
1363 (set-buffer buffer)
1364 (let ((min (bs--get-value (nth 1 (car columns))))
1365 ;;(max (bs--get-value (nth 2 (car columns)))) refered no more
1366 (align (nth 3 (car columns)))
1367 (fun (nth 4 (car columns)))
1368 (val nil)
1369 new-string)
1370 (setq val (bs--get-value fun apply-args))
1371 (setq new-string (bs--format-aux val align (- min to-much)))
1372 (setq string (concat string new-string))
1373 (if (> (length new-string) min)
1374 (setq to-much (- (length new-string) min)))
1375 ) ; let
1376 (setq columns (cdr columns))))
1377 (insert string)
1378 string))
1380 (defun bs--format-aux (string align len)
1381 "Generate a string with STRING with alignment ALIGN and length LEN.
1382 ALIGN is one of the symbols `left', `middle', or `right'."
1383 (let* ((width (length string))
1384 (len (max len width)))
1385 (format (format "%%%s%ds" (if (eq align 'right) "" "-") len)
1386 (if (eq align 'middle)
1387 (concat (make-string (/ (- len width) 2) ?\s) string)
1388 string))))
1390 (defun bs--show-header ()
1391 "Insert header for Buffer Selection Menu in current buffer."
1392 (mapcar '(lambda (string)
1394 (bs--create-header)))
1396 (defun bs--get-name-length ()
1397 "Return value of `bs--name-entry-length'."
1398 bs--name-entry-length)
1400 (defun bs--create-header ()
1401 "Return all header lines used in Buffer Selection Menu as a list of strings."
1402 (list (mapconcat (lambda (column)
1403 (bs--format-aux (bs--get-value (car column))
1404 (nth 3 column) ; align
1405 (bs--get-value (nth 1 column))))
1406 bs-attributes-list
1407 "")
1408 (mapconcat (lambda (column)
1409 (let ((length (length (bs--get-value (car column)))))
1410 (bs--format-aux (make-string length ?-)
1411 (nth 3 column) ; align
1412 (bs--get-value (nth 1 column)))))
1413 bs-attributes-list
1414 "")))
1416 (defun bs--show-with-configuration (name &optional arg)
1417 "Display buffer list of configuration with name NAME.
1418 Set configuration NAME and determine window for Buffer Selection Menu.
1419 Unless current buffer is buffer *buffer-selection* we have to save
1420 the buffer we started Buffer Selection Menu and the current window
1421 configuration to restore buffer and window configuration after a
1422 selection. If there is already a window displaying *buffer-selection*
1423 select this window for Buffer Selection Menu. Otherwise open a new
1424 window.
1425 The optional argument ARG is the prefix argument when calling a function
1426 for buffer selection."
1427 (bs-set-configuration name)
1428 (let ((bs--show-all (or bs--show-all arg)))
1429 (unless (string= "*buffer-selection*" (buffer-name))
1430 ;; Only when not in buffer *buffer-selection*
1431 ;; we have to set the buffer we started the command
1432 (progn
1433 (setq bs--buffer-coming-from (current-buffer))
1434 (setq bs--window-config-coming-from (current-window-configuration))))
1435 (let ((liste (bs-buffer-list))
1436 (active-window (bs--window-for-buffer "*buffer-selection*")))
1437 (if active-window
1438 (select-window active-window)
1439 (if (> (window-height (selected-window)) 7)
1440 (progn
1441 (split-window-vertically)
1442 (other-window 1))))
1443 (bs-show-in-buffer liste)
1444 (bs-message-without-log "%s" (bs--current-config-message)))))
1446 (defun bs--configuration-name-for-prefix-arg (prefix-arg)
1447 "Convert prefix argument PREFIX-ARG to a name of a buffer configuration.
1448 If PREFIX-ARG is nil return `bs-default-configuration'.
1449 If PREFIX-ARG is an integer return PREFIX-ARG element of `bs-configurations'.
1450 Otherwise return `bs-alternative-configuration'."
1451 (cond ;; usually activation
1452 ((null prefix-arg)
1453 bs-default-configuration)
1454 ;; call with integer as prefix argument
1455 ((integerp prefix-arg)
1456 (if (and (< 0 prefix-arg) (<= prefix-arg (length bs-configurations)))
1457 (car (nth (1- prefix-arg) bs-configurations))
1458 bs-default-configuration))
1459 ;; call by prefix argument C-u
1460 (t bs-alternative-configuration)))
1462 ;; ----------------------------------------------------------------------
1463 ;; Main function bs-customize and bs-show
1464 ;; ----------------------------------------------------------------------
1466 ;;;###autoload
1467 (defun bs-customize ()
1468 "Customization of group bs for Buffer Selection Menu."
1469 (interactive)
1470 (customize-group "bs"))
1472 ;;;###autoload
1473 (defun bs-show (arg)
1474 "Make a menu of buffers so you can manipulate buffers or the buffer list.
1476 There are many key commands similar to `Buffer-menu-mode' for
1477 manipulating buffer list and buffers itself.
1478 User can move with [up] or [down], select a buffer
1482 With prefix argument ARG show a different buffer list. Function
1483 `bs--configuration-name-for-prefix-arg' determine accordingly
1484 name of buffer configuration."
1485 (interactive "P")
1486 (setq bs--marked-buffers nil)
1487 (bs--show-with-configuration (bs--configuration-name-for-prefix-arg arg)))
1489 ;; Now provide feature bs
1490 (provide 'bs)
1492 ;;; arch-tag: c0d9ab34-bf06-4368-ae9d-af88878e6802
1493 ;;; bs.el ends here