| blob | 2e4fc881d9fcac9ec15fb332fc4d4cc8259eeb40 |
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."
187 "Return a regexp matching the first line of a Buffer Selection Menu buffer."
195 ;; Font-Lock-Settings
200 ;; Buffername embedded by *
202 1
203 ;; problem in XEmacs with font-lock-constant-face
205 'font-lock-constant-face
207 ;; Dired-Buffers
209 ;; the star for modified buffers
214 "*Maximal window height of Buffer Selection Menu."
219 "Regular expression specifying which buffers not to show.
220 A buffer whose name matches this regular expression will not be
224 "Regular expression for specifying buffers which must be shown.
225 A buffer whose name matches this regular expression will be
226 included in the buffer list.
227 Note that this variable is temporary: if the configuration is changed
228 it is reset to nil. Use `bs-must-always-show-regexp' to specify buffers
232 "*Regular expression for specifying buffers to show always.
233 A buffer whose name matches this regular expression will
234 be shown regardless of current configuration of Buffer Selection Menu."
239 "Function for specifying buffers not to show.
240 The function gets one argument - the buffer to test. The function must
241 return a value different from nil to ignore the buffer in
245 "Function for specifying buffers which must be shown.
249 "Sort function to sort the buffers that appear in Buffer Selection Menu.
253 "*Maximum column width for buffer names.
254 The column for buffer names has dynamic width. The width depends on
255 maximal and minimal length of names of buffers to show. The maximal
256 width is bounded by `bs-maximal-buffer-name-column'.
257 See also `bs-minimal-buffer-name-column'."
262 "*Minimum column width for buffer names.
263 The column for buffer names has dynamic width. The width depends on
264 maximal and minimal length of names of buffers to show. The minimal
265 width is bounded by `bs-minimal-buffer-name-column'.
266 See also `bs-maximal-buffer-name-column'."
277 bs-sort-buffer-interns-are-last)
279 "*List of all configurations you can use in the Buffer Selection Menu.
280 A configuration describes which buffers appear in Buffer Selection Menu
281 and also the order of buffers. A configuration is a list with
282 six elements. The first element is a string and describes the configuration.
283 The following five elements represent the values for Buffer Selection Menu
284 configuration variables `bs-must-show-regexp', `bs-must-show-function',
285 `bs-dont-show-regexp', `bs-dont-show-function' and `bs-buffer-sort-function'.
286 By setting these variables you define a configuration."
291 "*Name of default configuration used by the Buffer Selection Menu.
294 Must be a string used in `bs-configurations' for naming a configuration."
299 "*Name of configuration used when calling `bs-show' with \
301 Must be a string used in `bs-configurations' for naming a configuration."
306 "Name of current configuration.
310 "*Name of configuration used when cycling through the buffer list.
311 A value of nil means to use current configuration `bs-default-configuration'.
312 Must be a string used in `bs-configurations' for naming a configuration."
315 string))
318 "*String added in column 1 indicating a buffer will always be shown."
323 "*String added in column 1 indicating a buffer will never be shown."
328 "*String added in column 1 indicating the current buffer."
333 "*String added in column 1 indicating the current buffer when it is marked."
338 "*String added in column 1 indicating a marked buffer."
343 "*String added in column 1 indicating a unmarked buffer."
348 "Maximum length of all displayed buffer names.
351 ;; ----------------------------------------------------------------------
352 ;; Internal globals
353 ;; ----------------------------------------------------------------------
356 "Flag for the current mode for showing this buffer.
357 A value of nil means buffer will be shown depending on the current
358 configuration.
359 A value of `never' means to never show the buffer.
364 ;; Make face named region (for XEmacs)
370 "Compare buffers B1 and B2 by buffer name."
375 "Compare buffers B1 and B2 by file name."
380 "Compare buffers B1 and B2 by mode name."
386 "Compare buffers B1 and B2 by buffer size."
397 "*List of all possible sorting aspects for Buffer Selection Menu.
398 You can add a new entry with a call to `bs-define-sort-function'.
399 Each element is a list of four elements (NAME FUNCTION REGEXP-FOR-SORTING FACE)
400 NAME specifies the sort order defined by function FUNCTION.
401 FUNCTION nil means don't sort the buffer list. Otherwise the functions
402 must have two parameters - the buffers to compare.
403 REGEXP-FOR-SORTING is a regular expression which describes the
404 column title to highlight.
405 FACE is a face used to fontify the sorted column title. A value of nil means
406 don't highlight."
411 "Define a new function for buffer sorting in Buffer Selection Menu.
412 NAME specifies the sort order defined by function FUN.
413 A value of nil for FUN means don't sort the buffer list. Otherwise the
414 functions must have two parameters - the buffers to compare.
415 REGEXP-FOR-SORTING is a regular expression which describes the
416 column title to highlight.
417 FACE is a face used to fontify the sorted column title. A value of nil means
418 don't highlight.
419 The new sort aspect will be inserted into list `bs-sort-functions'."
425 bs-sort-functions)))))
428 "Description of the current function for sorting the buffer list.
432 "*Name of default sort behavior.
446 "Flag whether showing all buffers regardless of current configuration.
447 Non nil means to show all buffers. Otherwise show buffers
454 "Regular expression specifying which buffers never to show.
455 A buffer whose name matches this regular expression will never be
459 "List of buffers shown in Buffer Selection Menu.
473 (define-key map "F" 'bs-select-other-frame)
474 (let ((key ?1))
475 (while (<= key ?9)
476 (define-key map (char-to-string key) 'digit-argument)
477 (setq key (1+ key))))
478 (define-key map "-" 'negative-argument)
479 (define-key map "\e-" 'negative-argument)
480 (define-key map "o" 'bs-select-other-window)
481 (define-key map "\C-o" 'bs-tmp-select-other-window)
482 ;; for GNU EMACS
483 (define-key map [mouse-3] 'bs-mouse-select-other-frame)
484 ;; for XEmacs
485 (define-key map [button3] 'bs-mouse-select-other-frame)
486 (define-key map [up] 'bs-up)
487 (define-key map "n" 'bs-down)
488 (define-key map "p" 'bs-up)
489 (define-key map [down] 'bs-down)
490 (define-key map "\C-m" 'bs-select)
491 (define-key map "b" 'bs-bury-buffer)
492 (define-key map "s" 'bs-save)
493 (define-key map "S" 'bs-show-sorted)
494 (define-key map "a" 'bs-toggle-show-all)
495 (define-key map "d" 'bs-delete)
496 (define-key map "\C-d" 'bs-delete-backward)
497 (define-key map "k" 'bs-delete)
498 (define-key map "g" 'bs-refresh)
499 (define-key map "C" 'bs-set-configuration-and-refresh)
500 (define-key map "c" 'bs-select-next-configuration)
501 (define-key map "q" 'bs-kill)
502 ;; (define-key map "z" 'bs-kill)
503 (define-key map "\C-c\C-c" 'bs-kill)
504 (define-key map "\C-g" 'bs-abort)
505 (define-key map "\C-]" 'bs-abort)
506 (define-key map "%" 'bs-toggle-readonly)
507 (define-key map "~" 'bs-clear-modified)
508 (define-key map "M" 'bs-toggle-current-to-show)
509 (define-key map "+" 'bs-set-current-buffer-to-show-always)
510 ;;(define-key map "-" 'bs-set-current-buffer-to-show-never)
511 (define-key map "t" 'bs-visit-tags-table)
512 (define-key map "m" 'bs-mark-current)
513 (define-key map "u" 'bs-unmark-current)
514 (define-key map ">" 'scroll-right)
515 (define-key map "<" 'scroll-left)
516 (define-key map "?" 'bs-help)
517 map)
518 "Keymap of `bs-mode'.")
520 ;; ----------------------------------------------------------------------
521 ;; Functions
522 ;; ----------------------------------------------------------------------
524 (defun bs-buffer-list (&optional list sort-description)
525 "Return a list of buffers to be shown.
526 LIST is a list of buffers to test for appearance in Buffer Selection Menu.
527 The result list depends on the global variables `bs-dont-show-regexp',
528 `bs-must-show-regexp', `bs-dont-show-function', `bs-must-show-function'
529 and `bs-buffer-sort-function'.
530 If SORT-DESCRIPTION isn't nil the list will be sorted by
531 a special function. SORT-DESCRIPTION is an element of `bs-sort-functions'."
532 (setq sort-description (or sort-description bs--current-sort-function)
533 list (or list (buffer-list)))
534 (let ((result nil))
535 (while list
536 (let* ((buffername (buffer-name (car list)))
537 (int-show-never (string-match bs--intern-show-never buffername))
538 (ext-show-never (and bs-dont-show-regexp
539 (string-match bs-dont-show-regexp
540 buffername)))
541 (extern-must-show (or (and bs-must-always-show-regexp
542 (string-match
543 bs-must-always-show-regexp
544 buffername))
545 (and bs-must-show-regexp
546 (string-match bs-must-show-regexp
547 buffername))))
548 (extern-show-never-from-fun (and bs-dont-show-function
549 (funcall bs-dont-show-function
550 (car list))))
551 (extern-must-show-from-fun (and bs-must-show-function
552 (funcall bs-must-show-function
553 (car list))))
554 (show-flag (buffer-local-value 'bs-buffer-show-mark (car list))))
555 (if (or (eq show-flag 'always)
556 (and (or bs--show-all (not (eq show-flag 'never)))
557 (not int-show-never)
558 (or bs--show-all
559 extern-must-show
560 extern-must-show-from-fun
561 (and (not ext-show-never)
562 (not extern-show-never-from-fun)))))
563 (setq result (cons (car list)
564 result)))
565 (setq list (cdr list))))
566 (setq result (reverse result))
567 ;; The current buffer which was the start point of bs should be an element
568 ;; of result list, so that we can leave with space and be back in the
569 ;; buffer we started bs-show.
570 (if (and bs--buffer-coming-from
571 (buffer-live-p bs--buffer-coming-from)
572 (not (memq bs--buffer-coming-from result)))
573 (setq result (cons bs--buffer-coming-from result)))
574 ;; sorting
575 (if (and sort-description
576 (nth 1 sort-description))
577 (setq result (sort result (nth 1 sort-description)))
578 ;; else standard sorting
579 (bs-buffer-sort result))))
581 (defun bs-buffer-sort (buffer-list)
582 "Sort buffers in BUFFER-LIST according to `bs-buffer-sort-function'."
583 (if bs-buffer-sort-function
584 (sort buffer-list bs-buffer-sort-function)
585 buffer-list))
587 (defun bs--redisplay (&optional keep-line-p sort-description)
588 "Redisplay whole Buffer Selection Menu.
589 If KEEP-LINE-P is non nil the point will stay on current line.
590 SORT-DESCRIPTION is an element of `bs-sort-functions'"
591 (let ((line (1+ (count-lines 1 (point)))))
592 (bs-show-in-buffer (bs-buffer-list nil sort-description))
593 (if keep-line-p
594 (goto-line line))
595 (beginning-of-line)))
597 (defun bs--goto-current-buffer ()
598 "Goto line which represents the current buffer;
599 actually the line which begins with character in `bs-string-current' or
600 `bs-string-current-marked'."
601 (let ((regexp (concat "^"
602 (regexp-quote bs-string-current)
604 (regexp-quote bs-string-current-marked)))
605 point)
606 (save-excursion
607 (goto-char (point-min))
608 (if (search-forward-regexp regexp nil t)
609 (setq point (- (point) 1))))
610 (if point
611 (goto-char point))))
613 (defun bs--current-config-message ()
614 "Return a string describing the current `bs-mode' configuration."
615 (if bs--show-all
616 "Show all buffers."
617 (format "Show buffer by configuration %S"
618 bs-current-configuration)))
620 (defun bs-mode ()
621 "Major mode for editing a subset of Emacs' buffers.
623 Aside from two header lines each line describes one buffer.
624 Move to a line representing the buffer you want to edit and select
626 There are many key commands similar to `Buffer-menu-mode' for
627 manipulating the buffer list and buffers.
628 For faster navigation each digit key is a digit argument.
634 remain in Buffer Selection Menu.
644 apply selected configuration.
646 available Buffer Selection Menu configuration.
650 to show always.
653 (interactive)
654 (kill-all-local-variables)
655 (use-local-map bs-mode-map)
656 (make-local-variable 'font-lock-defaults)
657 (make-local-variable 'font-lock-verbose)
658 (setq major-mode 'bs-mode
659 mode-name "Buffer-Selection-Menu"
660 buffer-read-only t
661 truncate-lines t
662 font-lock-defaults '(bs-mode-font-lock-keywords t)
663 font-lock-verbose nil)
664 (run-mode-hooks 'bs-mode-hook))
666 (defun bs-kill ()
667 "Let buffer disappear and reset window-configuration."
668 (interactive)
669 (bury-buffer (current-buffer))
670 (set-window-configuration bs--window-config-coming-from))
672 (defun bs-abort ()
673 "Ding and leave Buffer Selection Menu without a selection."
674 (interactive)
675 (ding)
676 (bs-kill))
678 (defun bs-set-configuration-and-refresh ()
679 "Ask user for a configuration and apply selected configuration.
680 Refresh whole Buffer Selection Menu."
681 (interactive)
682 (call-interactively 'bs-set-configuration)
683 (bs--redisplay t))
685 (defun bs-refresh ()
686 "Refresh whole Buffer Selection Menu."
687 (interactive)
688 (bs--redisplay t))
690 (defun bs--window-for-buffer (buffer-name)
691 "Return a window showing a buffer with name BUFFER-NAME.
692 Take only windows of current frame into account.
693 Return nil if there is no such buffer."
694 (let ((window nil))
695 (walk-windows (lambda (wind)
696 (if (string= (buffer-name (window-buffer wind))
697 buffer-name)
698 (setq window wind))))
699 window))
701 (defun bs--set-window-height ()
702 "Change the height of the selected window to suit the current buffer list."
703 (unless (one-window-p t)
704 (shrink-window (- (window-height (selected-window))
705 ;; window-height in xemacs includes mode-line
706 (+ (if bs--running-in-xemacs 3 1)
707 bs-header-lines-length
708 (min (length bs-current-list)
709 bs-max-window-height))))))
711 (defun bs--current-buffer ()
712 "Return buffer on current line.
713 Raise an error if not on a buffer line."
714 (beginning-of-line)
715 (let ((line (+ (- bs-header-lines-length)
716 (count-lines 1 (point)))))
717 (if (< line 0)
718 (error "You are on a header row"))
719 (nth line bs-current-list)))
721 (defun bs--update-current-line ()
722 "Update the entry on current line for Buffer Selection Menu."
723 (let ((buffer (bs--current-buffer))
724 (inhibit-read-only t))
725 (beginning-of-line)
726 (delete-region (point) (line-end-position))
727 (bs--insert-one-entry buffer)
728 (beginning-of-line)))
730 (defun bs-view ()
731 "View current line's buffer in View mode.
732 Leave Buffer Selection Menu."
733 (interactive)
734 (view-buffer (bs--current-buffer)))
736 (defun bs-select ()
737 "Select current line's buffer and other marked buffers.
738 If there are no marked buffers the window configuration before starting
739 Buffer Selectin Menu will be restored.
740 If there are marked buffers each marked buffer and the current line's buffer
741 will be selected in a window.
742 Leave Buffer Selection Menu."
743 (interactive)
744 (let ((buffer (bs--current-buffer)))
745 (bury-buffer (current-buffer))
746 (set-window-configuration bs--window-config-coming-from)
747 (switch-to-buffer buffer)
748 (if bs--marked-buffers
749 ;; Some marked buffers for selection
750 (let* ((all (delq buffer bs--marked-buffers))
751 (height (/ (1- (frame-height)) (1+ (length all)))))
752 (delete-other-windows)
753 (switch-to-buffer buffer)
754 (while all
755 (split-window nil height)
756 (other-window 1)
757 (switch-to-buffer (car all))
758 (setq all (cdr all)))
759 ;; goto window we have started bs.
760 (other-window 1)))))
762 (defun bs-select-other-window ()
763 "Select current line's buffer by `switch-to-buffer-other-window'.
764 The window configuration before starting Buffer Selectin Menu will be restored
765 unless there is no other window. In this case a new window will be created.
766 Leave Buffer Selection Menu."
767 (interactive)
768 (let ((buffer (bs--current-buffer)))
769 (bury-buffer (current-buffer))
770 (set-window-configuration bs--window-config-coming-from)
771 (switch-to-buffer-other-window buffer)))
773 (defun bs-tmp-select-other-window ()
774 "Make the other window select this line's buffer.
775 The current window remains selected."
776 (interactive)
777 (let ((buffer (bs--current-buffer)))
778 (display-buffer buffer t)))
780 (defun bs-select-other-frame ()
781 "Select current line's buffer in new created frame.
782 Leave Buffer Selection Menu."
783 (interactive)
784 (let ((buffer (bs--current-buffer)))
785 (bury-buffer (current-buffer))
786 (set-window-configuration bs--window-config-coming-from)
787 (switch-to-buffer-other-frame buffer)))
789 (defun bs-mouse-select-other-frame (event)
790 "Select selected line's buffer in new created frame.
791 Leave Buffer Selection Menu.
792 EVENT: a mouse click EVENT."
793 (interactive "e")
794 (mouse-set-point event)
795 (bs-select-other-frame))
797 (defun bs-mouse-select (event)
798 "Select buffer on mouse click EVENT.
799 Select buffer by `bs-select'."
800 (interactive "e")
801 (mouse-set-point event)
802 (bs-select))
804 (defun bs-select-in-one-window ()
805 "Select current line's buffer in one window and delete other windows.
806 Leave Buffer Selection Menu."
807 (interactive)
808 (bs-select)
809 (delete-other-windows))
811 (defun bs-bury-buffer ()
812 "Bury buffer on current line."
813 (interactive)
814 (bury-buffer (bs--current-buffer))
815 (bs--redisplay t))
817 (defun bs-save ()
818 "Save buffer on current line."
819 (interactive)
820 (let ((buffer (bs--current-buffer)))
821 (save-excursion
822 (set-buffer buffer)
823 (save-buffer))
824 (bs--update-current-line)))
826 (defun bs-visit-tags-table ()
827 "Visit the tags table in the buffer on this line.
828 See `visit-tags-table'."
829 (interactive)
830 (let ((file (buffer-file-name (bs--current-buffer))))
831 (if file
832 (visit-tags-table file)
833 (error "Specified buffer has no file"))))
835 (defun bs-toggle-current-to-show ()
836 "Toggle status of showing flag for buffer in current line."
837 (interactive)
838 (let ((buffer (bs--current-buffer))
839 res)
840 (save-excursion
841 (set-buffer buffer)
842 (setq res (cond ((null bs-buffer-show-mark)
843 'never)
844 ((eq bs-buffer-show-mark 'never)
845 'always)
846 (t nil)))
847 (setq bs-buffer-show-mark res))
848 (bs--update-current-line)
849 (bs--set-window-height)
850 (bs--show-config-message res)))
852 (defun bs-set-current-buffer-to-show-always (&optional not-to-show-p)
853 "Toggle status of buffer on line to `always shown'.
854 NOT-TO-SHOW-P: prefix argument.
855 With no prefix argument the buffer on current line is marked to show
856 always. Otherwise it is marked to show never."
857 (interactive "P")
858 (if not-to-show-p
859 (bs-set-current-buffer-to-show-never)
860 (bs--set-toggle-to-show (bs--current-buffer) 'always)))
862 (defun bs-set-current-buffer-to-show-never ()
863 "Toggle status of buffer on line to `never shown'."
864 (interactive)
865 (bs--set-toggle-to-show (bs--current-buffer) 'never))
867 (defun bs--set-toggle-to-show (buffer what)
868 "Set value `bs-buffer-show-mark' of buffer BUFFER to WHAT.
869 Redisplay current line and display a message describing
870 the status of buffer on current line."
871 (with-current-buffer buffer (setq bs-buffer-show-mark what))
872 (bs--update-current-line)
873 (bs--set-window-height)
874 (bs--show-config-message what))
876 (defun bs-mark-current (count)
877 "Mark buffers.
878 COUNT is the number of buffers to mark.
879 Move cursor vertically down COUNT lines."
880 (interactive "p")
881 (let ((dir (if (> count 0) 1 -1))
882 (count (abs count)))
883 (while (> count 0)
884 (let ((buffer (bs--current-buffer)))
885 (if buffer
886 (setq bs--marked-buffers (cons buffer bs--marked-buffers)))
887 (bs--update-current-line)
888 (bs-down dir))
889 (setq count (1- count)))))
891 (defun bs-unmark-current (count)
892 "Unmark buffers.
893 COUNT is the number of buffers to unmark.
894 Move cursor vertically down COUNT lines."
895 (interactive "p")
896 (let ((dir (if (> count 0) 1 -1))
897 (count (abs count)))
898 (while (> count 0)
899 (let ((buffer (bs--current-buffer)))
900 (if buffer
901 (setq bs--marked-buffers (delq buffer bs--marked-buffers)))
902 (bs--update-current-line)
903 (bs-down dir))
904 (setq count (1- count)))))
906 (defun bs--show-config-message (what)
907 "Show message indicating the new showing status WHAT.
908 WHAT is a value of nil, `never', or `always'."
909 (bs-message-without-log (cond ((null what)
910 "Buffer will be shown normally.")
911 ((eq what 'never)
912 "Mark buffer to never be shown.")
913 (t "Mark buffer to show always."))))
915 (defun bs-delete ()
916 "Kill buffer on current line."
917 (interactive)
918 (let ((current (bs--current-buffer))
919 (inhibit-read-only t))
920 (unless (kill-buffer current)
921 (error "Buffer was not deleted"))
922 (setq bs-current-list (delq current bs-current-list))
923 (beginning-of-line)
924 (delete-region (point) (save-excursion
925 (end-of-line)
926 (if (eobp) (point) (1+ (point)))))
927 (if (eobp)
928 (progn
929 (backward-delete-char 1)
930 (beginning-of-line)
931 (recenter -1)))
932 (bs--set-window-height)))
934 (defun bs-delete-backward ()
935 "Like `bs-delete' but go to buffer in front of current."
936 (interactive)
937 (let ((on-last-line-p (save-excursion (end-of-line) (eobp))))
938 (bs-delete)
939 (unless on-last-line-p
940 (bs-up 1))))
942 (defun bs-show-sorted ()
943 "Show buffer list sorted by buffer name."
944 (interactive)
945 (setq bs--current-sort-function
946 (bs-next-config-aux (car bs--current-sort-function)
947 bs-sort-functions))
948 (bs--redisplay)
949 (bs--goto-current-buffer)
950 (bs-message-without-log "Sorted %s" (car bs--current-sort-function)))
952 (defun bs-apply-sort-faces (&optional sort-description)
953 "Set text properties for the sort described by SORT-DESCRIPTION.
954 SORT-DESCRIPTION is an element of `bs-sort-functions'.
955 Default is `bs--current-sort-function'."
956 (let ((sort-description (or sort-description
957 bs--current-sort-function)))
958 (save-excursion
959 (goto-char (point-min))
960 (if (and (nth 2 sort-description)
961 (search-forward-regexp (nth 2 sort-description) nil t))
962 (let ((inhibit-read-only t))
963 (put-text-property (match-beginning 0)
964 (match-end 0)
965 'face
966 (or (nth 3 sort-description)
967 'region)))))))
969 (defun bs-toggle-show-all ()
970 "Toggle show all buffers / show buffers with current configuration."
971 (interactive)
972 (setq bs--show-all (not bs--show-all))
973 (bs--redisplay)
974 (bs--goto-current-buffer)
975 (bs-message-without-log "%s" (bs--current-config-message)))
977 (defun bs-toggle-readonly ()
978 "Toggle read-only status for buffer on current line.
979 Uses function `vc-toggle-read-only'."
980 (interactive)
981 (let ((buffer (bs--current-buffer)))
982 (save-excursion
983 (set-buffer buffer)
984 (vc-toggle-read-only))
985 (bs--update-current-line)))
987 (defun bs-clear-modified ()
988 "Set modified flag for buffer on current line to nil."
989 (interactive)
990 (let ((buffer (bs--current-buffer)))
991 (save-excursion
992 (set-buffer buffer)
993 (set-buffer-modified-p nil)))
994 (bs--update-current-line))
996 (defun bs--nth-wrapper (count fun &rest args)
997 "Call COUNT times function FUN with arguments ARGS."
998 (setq count (or count 1))
999 (while (> count 0)
1000 (apply fun args)
1001 (setq count (1- count))))
1003 (defun bs-up (arg)
1004 "Move cursor vertically up ARG lines in Buffer Selection Menu."
1005 (interactive "p")
1006 (if (and arg (numberp arg) (< arg 0))
1007 (bs--nth-wrapper (- arg) 'bs--down)
1008 (bs--nth-wrapper arg 'bs--up)))
1010 (defun bs--up ()
1011 "Move cursor vertically up one line.
1012 If on top of buffer list go to last line."
1013 (interactive "p")
1014 (previous-line 1)
1015 (if (<= (count-lines 1 (point)) (1- bs-header-lines-length))
1016 (progn
1017 (goto-char (point-max))
1018 (beginning-of-line)
1019 (recenter -1))
1020 (beginning-of-line)))
1022 (defun bs-down (arg)
1023 "Move cursor vertically down ARG lines in Buffer Selection Menu."
1024 (interactive "p")
1025 (if (and arg (numberp arg) (< arg 0))
1026 (bs--nth-wrapper (- arg) 'bs--up)
1027 (bs--nth-wrapper arg 'bs--down)))
1029 (defun bs--down ()
1030 "Move cursor vertically down one line.
1031 If at end of buffer list go to first line."
1032 (let ((last (line-end-position)))
1033 (if (eq last (point-max))
1034 (goto-line (1+ bs-header-lines-length))
1035 (next-line 1))))
1037 (defun bs-visits-non-file (buffer)
1038 "Return t or nil whether BUFFER visits no file.
1039 A value of t means BUFFER belongs to no file.
1040 A value of nil means BUFFER belongs to a file."
1041 (not (buffer-file-name buffer)))
1043 (defun bs-sort-buffer-interns-are-last (b1 b2)
1044 "Function for sorting internal buffers B1 and B2 at the end of all buffers."
1047 ;; ----------------------------------------------------------------------
1048 ;; Configurations:
1049 ;; ----------------------------------------------------------------------
1051 (defun bs-config-clear ()
1052 "*Reset all variables which specify a configuration.
1053 These variables are `bs-dont-show-regexp', `bs-must-show-regexp',
1054 `bs-dont-show-function', `bs-must-show-function' and
1055 `bs-buffer-sort-function'."
1056 (setq bs-dont-show-regexp nil
1057 bs-must-show-regexp nil
1058 bs-dont-show-function nil
1059 bs-must-show-function nil
1060 bs-buffer-sort-function nil))
1062 (defun bs-config--only-files ()
1063 "Define a configuration for showing only buffers visiting a file."
1064 (bs-config-clear)
1065 (setq ;; I want to see *-buffers at the end
1066 bs-buffer-sort-function 'bs-sort-buffer-interns-are-last
1067 ;; Don't show files who don't belong to a file
1068 bs-dont-show-function 'bs-visits-non-file))
1070 (defun bs-config--files-and-scratch ()
1071 "Define a configuration for showing buffer *scratch* and file buffers."
1072 (bs-config-clear)
1073 (setq ;; I want to see *-buffers at the end
1074 bs-buffer-sort-function 'bs-sort-buffer-interns-are-last
1075 ;; Don't show files who don't belong to a file
1076 bs-dont-show-function 'bs-visits-non-file
1077 ;; Show *scratch* buffer.
1080 (defun bs-config--all ()
1081 "Define a configuration for showing all buffers.
1082 Reset all according variables by `bs-config-clear'."
1083 (bs-config-clear))
1085 (defun bs-config--all-intern-last ()
1086 "Define a configuration for showing all buffers.
1087 Internal buffers appear at end of all buffers."
1088 (bs-config-clear)
1089 ;; I want to see *-buffers at the end
1090 (setq bs-buffer-sort-function 'bs-sort-buffer-interns-are-last))
1092 (defun bs-set-configuration (name)
1093 "Set configuration to the one saved under string NAME in `bs-configurations'.
1094 When called interactively ask user for a configuration and apply selected
1095 configuration."
1096 (interactive (list (completing-read "Use configuration: "
1097 bs-configurations
1098 nil
1099 t)))
1100 (let ((list (assoc name bs-configurations)))
1101 (if list
1102 (if (listp list)
1103 (setq bs-current-configuration name
1104 bs-must-show-regexp (nth 1 list)
1105 bs-must-show-function (nth 2 list)
1106 bs-dont-show-regexp (nth 3 list)
1107 bs-dont-show-function (nth 4 list)
1108 bs-buffer-sort-function (nth 5 list))
1109 ;; for backward compability
1110 (funcall (cdr list)))
1111 ;; else
1112 (ding)
1113 (bs-message-without-log "No bs-configuration named %S." name))))
1115 (defun bs-help ()
1116 "Help for `bs-show'."
1117 (interactive)
1118 (describe-function 'bs-mode))
1120 (defun bs-next-config-aux (start-name list)
1121 "Get the next assoc after START-NAME in list LIST.
1122 Will return the first if START-NAME is at end."
1123 (let ((assocs list)
1124 (length (length list))
1125 pos)
1126 (while (and assocs (not pos))
1127 (if (string= (car (car assocs)) start-name)
1128 (setq pos (- length (length assocs))))
1129 (setq assocs (cdr assocs)))
1130 (setq pos (1+ pos))
1131 (if (eq pos length)
1132 (car list)
1133 (nth pos list))))
1135 (defun bs-next-config (name)
1136 "Return next configuration with respect to configuration with name NAME."
1137 (bs-next-config-aux name bs-configurations))
1139 (defun bs-select-next-configuration (&optional start-name)
1140 "Apply next configuration START-NAME and refresh buffer list.
1141 If START-NAME is nil the current configuration `bs-current-configuration'
1142 will be used."
1143 (interactive)
1144 (let ((config (bs-next-config (or start-name bs-current-configuration))))
1145 (bs-set-configuration (car config))
1146 (setq bs-default-configuration bs-current-configuration)
1147 (bs--redisplay t)
1148 (bs--set-window-height)
1149 (bs-message-without-log "Selected configuration: %s" (car config))))
1151 (defun bs-show-in-buffer (list)
1152 "Display buffer list LIST in buffer *buffer-selection*.
1153 Select buffer *buffer-selection* and display buffers according to current
1154 configuration `bs-current-configuration'. Set window height, fontify buffer
1155 and move point to current buffer."
1156 (setq bs-current-list list)
1157 (switch-to-buffer (get-buffer-create "*buffer-selection*"))
1158 (bs-mode)
1159 (let* ((inhibit-read-only t)
1160 (map-fun (lambda (entry)
1161 (length (buffer-name entry))))
1162 (max-length-of-names (apply 'max
1163 (cons 0 (mapcar map-fun list))))
1164 (name-entry-length (min bs-maximal-buffer-name-column
1165 (max bs-minimal-buffer-name-column
1166 max-length-of-names))))
1167 (erase-buffer)
1168 (setq bs--name-entry-length name-entry-length)
1169 (bs--show-header)
1170 (while list
1171 (bs--insert-one-entry (car list))
1173 (setq list (cdr list)))
1174 (delete-backward-char 1)
1175 (bs--set-window-height)
1176 (bs--goto-current-buffer)
1177 (font-lock-fontify-buffer)
1178 (bs-apply-sort-faces)))
1180 (defun bs-next-buffer (&optional buffer-list sorting-p)
1181 "Return next buffer and buffer list for buffer cycling in BUFFER-LIST.
1182 Ignore sorting when SORTING-P is nil.
1183 If BUFFER-LIST is nil the result of `bs-buffer-list' will be used as
1184 buffer list. The result is a cons of normally the second element of
1185 BUFFER-LIST and the buffer list used for buffer cycling."
1186 (let* ((bs--current-sort-function (if sorting-p
1187 bs--current-sort-function))
1188 (bs-buffer-list (or buffer-list (bs-buffer-list))))
1189 (cons (or (car (cdr bs-buffer-list))
1190 (car bs-buffer-list)
1191 (current-buffer))
1192 bs-buffer-list)))
1194 (defun bs-previous-buffer (&optional buffer-list sorting-p)
1195 "Return previous buffer and buffer list for buffer cycling in BUFFER-LIST.
1196 Ignore sorting when SORTING-P is nil.
1197 If BUFFER-LIST is nil the result of `bs-buffer-list' will be used as
1198 buffer list. The result is a cons of last element of BUFFER-LIST and the
1199 buffer list used for buffer cycling."
1200 (let* ((bs--current-sort-function (if sorting-p
1201 bs--current-sort-function))
1202 (bs-buffer-list (or buffer-list (bs-buffer-list))))
1203 (cons (or (car (last bs-buffer-list))
1204 (current-buffer))
1205 bs-buffer-list)))
1207 (defun bs-message-without-log (&rest args)
1208 "Like `message' but don't log it on the message log.
1209 All arguments ARGS are transferred to function `message'."
1210 (let ((message-log-max nil))
1211 (apply 'message args)))
1213 (defvar bs--cycle-list nil
1214 "Current buffer list used for cycling.")
1216 ;;;###autoload
1217 (defun bs-cycle-next ()
1218 "Select next buffer defined by buffer cycling.
1219 The buffers taking part in buffer cycling are defined
1220 by buffer configuration `bs-cycle-configuration-name'."
1221 (interactive)
1222 (let ((bs--buffer-coming-from (current-buffer))
1223 (bs-dont-show-regexp bs-dont-show-regexp)
1224 (bs-must-show-regexp bs-must-show-regexp)
1225 (bs-dont-show-function bs-dont-show-function)
1226 (bs-must-show-function bs-must-show-function)
1227 (bs--show-all nil))
1228 (bs-set-configuration (or bs-cycle-configuration-name bs-default-configuration))
1229 (let ((bs-buffer-sort-function nil)
1230 (bs--current-sort-function nil))
1231 (let* ((tupel (bs-next-buffer (if (or (eq last-command
1232 'bs-cycle-next)
1233 (eq last-command
1234 'bs-cycle-previous))
1235 bs--cycle-list)))
1236 (next (car tupel))
1237 (cycle-list (cdr tupel)))
1238 (setq bs--cycle-list (append (cdr cycle-list)
1239 (list (car cycle-list))))
1240 (bury-buffer)
1241 (switch-to-buffer next)
1242 (bs-message-without-log "Next buffers: %s"
1243 (or (cdr bs--cycle-list)
1244 "this buffer"))))))
1247 ;;;###autoload
1248 (defun bs-cycle-previous ()
1249 "Select previous buffer defined by buffer cycling.
1250 The buffers taking part in buffer cycling are defined
1251 by buffer configuration `bs-cycle-configuration-name'."
1252 (interactive)
1253 (let ((bs--buffer-coming-from (current-buffer))
1254 (bs-dont-show-regexp bs-dont-show-regexp)
1255 (bs-must-show-regexp bs-must-show-regexp)
1256 (bs-dont-show-function bs-dont-show-function)
1257 (bs-must-show-function bs-must-show-function)
1258 (bs--show-all nil))
1259 (bs-set-configuration (or bs-cycle-configuration-name bs-default-configuration))
1260 (let ((bs-buffer-sort-function nil)
1261 (bs--current-sort-function nil))
1262 (let* ((tupel (bs-previous-buffer (if (or (eq last-command
1263 'bs-cycle-next)
1264 (eq last-command
1265 'bs-cycle-previous))
1266 bs--cycle-list)))
1267 (prev-buffer (car tupel))
1268 (cycle-list (cdr tupel)))
1269 (setq bs--cycle-list (append (last cycle-list)
1270 (reverse (cdr (reverse cycle-list)))))
1271 (switch-to-buffer prev-buffer)
1272 (bs-message-without-log "Previous buffers: %s"
1273 (or (reverse (cdr bs--cycle-list))
1274 "this buffer"))))))
1276 (defun bs--get-value (fun &optional args)
1277 "Apply function FUN with arguments ARGS.
1278 Return result of evaluation. Will return FUN if FUN is a number
1279 or a string."
1280 (cond ((numberp fun)
1281 fun)
1282 ((stringp fun)
1283 fun)
1284 (t (apply fun args))))
1286 (defun bs--get-marked-string (start-buffer all-buffers)
1287 "Return a string which describes whether current buffer is marked.
1288 START-BUFFER is the buffer where we started buffer selection.
1289 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu.
1290 The result string is one of `bs-string-current', `bs-string-current-marked',
1291 `bs-string-marked', `bs-string-show-normally', `bs-string-show-never', or
1292 `bs-string-show-always'."
1293 (cond ;; current buffer is the buffer we started buffer selection.
1294 ((eq (current-buffer) start-buffer)
1295 (if (memq (current-buffer) bs--marked-buffers)
1296 bs-string-current-marked ; buffer is marked
1297 bs-string-current))
1298 ;; current buffer is marked
1299 ((memq (current-buffer) bs--marked-buffers)
1300 bs-string-marked)
1301 ;; current buffer hasn't a special mark.
1302 ((null bs-buffer-show-mark)
1303 bs-string-show-normally)
1304 ;; current buffer has a mark not to show itself.
1305 ((eq bs-buffer-show-mark 'never)
1306 bs-string-show-never)
1307 ;; otherwise current buffer is marked to show always.
1308 (t
1309 bs-string-show-always)))
1311 (defun bs--get-modified-string (start-buffer all-buffers)
1312 "Return a string which describes whether current buffer is modified.
1313 START-BUFFER is the buffer where we started buffer selection.
1314 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu."
1315 (if (buffer-modified-p) "*" " "))
1317 (defun bs--get-readonly-string (start-buffer all-buffers)
1318 "Return a string which describes whether current buffer is read only.
1319 START-BUFFER is the buffer where we started buffer selection.
1320 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu."
1321 (if buffer-read-only "%" " "))
1323 (defun bs--get-size-string (start-buffer all-buffers)
1324 "Return a string which describes the size of current buffer.
1325 START-BUFFER is the buffer where we started buffer selection.
1326 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu."
1327 (int-to-string (buffer-size)))
1329 (defun bs--get-name (start-buffer all-buffers)
1330 "Return name of current buffer for Buffer Selection Menu.
1331 The name of current buffer gets additional text properties
1332 for mouse highlighting.
1333 START-BUFFER is the buffer where we started buffer selection.
1334 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu."
1335 (let ((name (copy-sequence (buffer-name))))
1336 (add-text-properties
1337 0 (length name)
1338 '(mouse-face highlight
1339 help-echo
1340 "mouse-2: select this buffer, mouse-3: select in other frame")
1341 name)
1342 (if (< (length name) bs--name-entry-length)
1343 (concat name
1344 (make-string (- bs--name-entry-length (length name)) ? ))
1345 name)))
1347 (defun bs--get-mode-name (start-buffer all-buffers)
1348 "Return the name of mode of current buffer for Buffer Selection Menu.
1349 START-BUFFER is the buffer where we started buffer selection.
1350 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu."
1351 mode-name)
1353 (defun bs--get-file-name (start-buffer all-buffers)
1354 "Return string for column 'File' in Buffer Selection Menu.
1355 This is the variable `buffer-file-name' of current buffer.
1356 If current mode is `dired-mode' or `shell-mode' it returns the
1357 default directory.
1358 START-BUFFER is the buffer where we started buffer selection.
1359 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu."
1360 (let ((string (copy-sequence (if (member major-mode
1361 '(shell-mode dired-mode))
1362 default-directory
1363 (or buffer-file-name "")))))
1364 (add-text-properties
1365 0 (length string)
1366 '(mouse-face highlight
1367 help-echo "mouse-2: select this buffer, mouse-3: select in other frame")
1368 string)
1369 string))
1371 (defun bs--insert-one-entry (buffer)
1372 "Generate one entry for buffer BUFFER in Buffer Selection Menu.
1373 It goes over all columns described in `bs-attributes-list'
1374 and evaluates corresponding string. Inserts string in current buffer;
1375 normally *buffer-selection*."
1376 (let ((string "")
1377 (columns bs-attributes-list)
1378 (to-much 0)
1379 (apply-args (append (list bs--buffer-coming-from bs-current-list))))
1380 (save-excursion
1381 (while columns
1382 (set-buffer buffer)
1383 (let ((min (bs--get-value (nth 1 (car columns))))
1384 ;;(max (bs--get-value (nth 2 (car columns)))) refered no more
1385 (align (nth 3 (car columns)))
1386 (fun (nth 4 (car columns)))
1387 (val nil)
1388 new-string)
1389 (setq val (bs--get-value fun apply-args))
1390 (setq new-string (bs--format-aux val align (- min to-much)))
1391 (setq string (concat string new-string))
1392 (if (> (length new-string) min)
1393 (setq to-much (- (length new-string) min)))
1394 ) ; let
1395 (setq columns (cdr columns))))
1396 (insert string)
1397 string))
1399 (defun bs--format-aux (string align len)
1400 "Generate a string with STRING with alignment ALIGN and length LEN.
1401 ALIGN is one of the symbols `left', `middle', or `right'."
1402 (let ((length (length string)))
1403 (if (>= length len)
1404 string
1405 (if (eq 'right align)
1406 (concat (make-string (- len length) ? ) string)
1407 (concat string (make-string (- len length) ? ))))))
1409 (defun bs--show-header ()
1410 "Insert header for Buffer Selection Menu in current buffer."
1411 (mapcar '(lambda (string)
1413 (bs--create-header)))
1415 (defun bs--get-name-length ()
1416 "Return value of `bs--name-entry-length'."
1417 bs--name-entry-length)
1419 (defun bs--create-header ()
1420 "Return all header lines used in Buffer Selection Menu as a list of strings."
1421 (list (mapconcat (lambda (column)
1422 (bs--format-aux (bs--get-value (car column))
1423 (nth 3 column) ; align
1424 (bs--get-value (nth 1 column))))
1425 bs-attributes-list
1426 "")
1427 (mapconcat (lambda (column)
1428 (let ((length (length (bs--get-value (car column)))))
1429 (bs--format-aux (make-string length ?-)
1430 (nth 3 column) ; align
1431 (bs--get-value (nth 1 column)))))
1432 bs-attributes-list
1433 "")))
1435 (defun bs--show-with-configuration (name &optional arg)
1436 "Display buffer list of configuration with name NAME.
1437 Set configuration NAME and determine window for Buffer Selection Menu.
1438 Unless current buffer is buffer *buffer-selection* we have to save
1439 the buffer we started Buffer Selection Menu and the current window
1440 configuration to restore buffer and window configuration after a
1441 selection. If there is already a window displaying *buffer-selection*
1442 select this window for Buffer Selection Menu. Otherwise open a new
1443 window.
1444 The optional argument ARG is the prefix argument when calling a function
1445 for buffer selection."
1446 (bs-set-configuration name)
1447 (let ((bs--show-all (or bs--show-all arg)))
1448 (unless (string= "*buffer-selection*" (buffer-name))
1449 ;; Only when not in buffer *buffer-selection*
1450 ;; we have to set the buffer we started the command
1451 (progn
1452 (setq bs--buffer-coming-from (current-buffer))
1453 (setq bs--window-config-coming-from (current-window-configuration))))
1454 (let ((liste (bs-buffer-list))
1455 (active-window (bs--window-for-buffer "*buffer-selection*")))
1456 (if active-window
1457 (select-window active-window)
1458 (if (> (window-height (selected-window)) 7)
1459 (progn
1460 (split-window-vertically)
1461 (other-window 1))))
1462 (bs-show-in-buffer liste)
1463 (bs-message-without-log "%s" (bs--current-config-message)))))
1465 (defun bs--configuration-name-for-prefix-arg (prefix-arg)
1466 "Convert prefix argument PREFIX-ARG to a name of a buffer configuration.
1467 If PREFIX-ARG is nil return `bs-default-configuration'.
1468 If PREFIX-ARG is an integer return PREFIX-ARG element of `bs-configurations'.
1469 Otherwise return `bs-alternative-configuration'."
1470 (cond ;; usually activation
1471 ((null prefix-arg)
1472 bs-default-configuration)
1473 ;; call with integer as prefix argument
1474 ((integerp prefix-arg)
1475 (if (and (< 0 prefix-arg) (<= prefix-arg (length bs-configurations)))
1476 (car (nth (1- prefix-arg) bs-configurations))
1477 bs-default-configuration))
1478 ;; call by prefix argument C-u
1479 (t bs-alternative-configuration)))
1481 ;; ----------------------------------------------------------------------
1482 ;; Main function bs-customize and bs-show
1483 ;; ----------------------------------------------------------------------
1485 ;;;###autoload
1486 (defun bs-customize ()
1487 "Customization of group bs for Buffer Selection Menu."
1488 (interactive)
1489 (customize-group "bs"))
1491 ;;;###autoload
1492 (defun bs-show (arg)
1493 "Make a menu of buffers so you can manipulate buffers or the buffer list.
1495 There are many key commands similar to `Buffer-menu-mode' for
1496 manipulating buffer list and buffers itself.
1497 User can move with [up] or [down], select a buffer
1501 With prefix argument ARG show a different buffer list. Function
1502 `bs--configuration-name-for-prefix-arg' determine accordingly
1503 name of buffer configuration."
1504 (interactive "P")
1505 (setq bs--marked-buffers nil)
1506 (bs--show-with-configuration (bs--configuration-name-for-prefix-arg arg)))
1508 ;; Now provide feature bs
1509 (provide 'bs)
1511 ;;; arch-tag: c0d9ab34-bf06-4368-ae9d-af88878e6802
1512 ;;; bs.el ends here