| blob | 01fd6180252fd3e27092f21c8ac754bed80807fe |
1 ;;; bs.el --- menu for selecting and displaying buffers
3 ;; Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004,
4 ;; 2005, 2006, 2007, 2008 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 3, 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:
134 ;; ----------------------------------------------------------------------
135 ;; Globals for customization
136 ;; ----------------------------------------------------------------------
139 "Buffer Selection: Maintaining buffers by buffer menu."
146 "Buffer Selection appearance: Appearance of bs buffer menu."
161 "*List specifying the layout of a Buffer Selection Menu buffer.
162 Each entry specifies a column and is a list of the form of:
163 \(HEADER MINIMUM-LENGTH MAXIMUM-LENGTH ALIGNMENT FUN-OR-STRING)
165 HEADER : String for header for first line or a function
166 which calculates column title.
167 MINIMUM-LENGTH : Minimum width of column (number or name of function).
168 The function must return a positive integer.
169 MAXIMUM-LENGTH : Maximum width of column (number or name of function)
170 (currently ignored).
171 ALIGNMENT : Alignment of column (`left', `right', `middle').
172 FUN-OR-STRING : Name of a function for calculating the value or a
173 string for a constant value.
175 The function gets as parameter the buffer where we have started
176 buffer selection and the list of all buffers to show. The function must
177 return a string representing the column's value."
182 "Return a regexp matching the first line of a Buffer Selection Menu buffer."
190 ;; Font-Lock-Settings
195 ;; Buffername embedded by *
197 1
198 ;; problem in XEmacs with font-lock-constant-face
200 'font-lock-constant-face
202 ;; Dired-Buffers
204 ;; the star for modified buffers
209 "*Maximal window height of Buffer Selection Menu."
214 "Regular expression specifying which buffers not to show.
215 A buffer whose name matches this regular expression will not be
219 "Regular expression for specifying buffers which must be shown.
220 A buffer whose name matches this regular expression will be
221 included in the buffer list.
222 Note that this variable is temporary: if the configuration is changed
223 it is reset to nil. Use `bs-must-always-show-regexp' to specify buffers
227 "*Regular expression for specifying buffers to show always.
228 A buffer whose name matches this regular expression will
229 be shown regardless of current configuration of Buffer Selection Menu."
234 "Function for specifying buffers not to show.
235 The function gets one argument - the buffer to test. The function must
236 return a value different from nil to ignore the buffer in
240 "Function for specifying buffers which must be shown.
244 "Sort function to sort the buffers that appear in Buffer Selection Menu.
245 The function gets two arguments - the buffers to compare.
249 "*Maximum column width for buffer names.
250 The column for buffer names has dynamic width. The width depends on
251 maximal and minimal length of names of buffers to show. The maximal
252 width is bounded by `bs-maximal-buffer-name-column'.
253 See also `bs-minimal-buffer-name-column'."
258 "*Minimum column width for buffer names.
259 The column for buffer names has dynamic width. The width depends on
260 maximal and minimal length of names of buffers to show. The minimal
261 width is bounded by `bs-minimal-buffer-name-column'.
262 See also `bs-maximal-buffer-name-column'."
273 bs-sort-buffer-interns-are-last)
275 "*List of all configurations you can use in the Buffer Selection Menu.
276 A configuration describes which buffers appear in Buffer Selection Menu
277 and also the order of buffers. A configuration is a list with
278 six elements. The first element is a string and describes the configuration.
279 The following five elements represent the values for Buffer Selection Menu
280 configuration variables `bs-must-show-regexp', `bs-must-show-function',
281 `bs-dont-show-regexp', `bs-dont-show-function' and `bs-buffer-sort-function'.
282 By setting these variables you define a configuration."
287 "*Name of default configuration used by the Buffer Selection Menu.
290 Must be a string used in `bs-configurations' for naming a configuration."
295 "*Name of configuration used when calling `bs-show' with \
297 Must be a string used in `bs-configurations' for naming a configuration."
302 "Name of current configuration.
306 "*Name of configuration used when cycling through the buffer list.
307 A value of nil means to use current configuration `bs-default-configuration'.
308 Must be a string used in `bs-configurations' for naming a configuration."
311 string))
314 "*String added in column 1 indicating a buffer will always be shown."
319 "*String added in column 1 indicating a buffer will never be shown."
324 "*String added in column 1 indicating the current buffer."
329 "*String added in column 1 indicating the current buffer when it is marked."
334 "*String added in column 1 indicating a marked buffer."
339 "*String added in column 1 indicating an unmarked buffer."
344 "Maximum length of all displayed buffer names.
347 ;; ----------------------------------------------------------------------
348 ;; Internal globals
349 ;; ----------------------------------------------------------------------
352 "Flag for the current mode for showing this buffer.
353 A value of nil means buffer will be shown depending on the current
354 configuration.
355 A value of `never' means to never show the buffer.
360 ;; Make face named region (for XEmacs)
366 "Compare buffers B1 and B2 by buffer name."
371 "Compare buffers B1 and B2 by file name."
376 "Compare buffers B1 and B2 by mode name."
382 "Compare buffers B1 and B2 by buffer size."
393 "*List of all possible sorting aspects for Buffer Selection Menu.
394 You can add a new entry with a call to `bs-define-sort-function'.
395 Each element is a list of four elements (NAME FUNCTION REGEXP-FOR-SORTING FACE).
396 NAME specifies the sort order defined by function FUNCTION.
397 FUNCTION nil means don't sort the buffer list. Otherwise the function
398 must have two parameters - the buffers to compare.
399 REGEXP-FOR-SORTING is a regular expression which describes the
400 column title to highlight.
401 FACE is a face used to fontify the sorted column title. A value of nil means
402 don't highlight."
407 "Define a new function for buffer sorting in Buffer Selection Menu.
408 NAME specifies the sort order defined by function FUN.
409 A value of nil for FUN means don't sort the buffer list. Otherwise the
410 functions must have two parameters - the buffers to compare.
411 REGEXP-FOR-SORTING is a regular expression which describes the
412 column title to highlight.
413 FACE is a face used to fontify the sorted column title. A value of nil means
414 don't highlight.
415 The new sort aspect will be inserted into list `bs-sort-functions'."
421 bs-sort-functions)))))
424 "Description of the current function for sorting the buffer list.
428 "*Name of default sort behavior.
442 "Flag whether showing all buffers regardless of current configuration.
443 Non-nil means to show all buffers. Otherwise show buffers
450 "Regular expression specifying which buffers never to show.
451 A buffer whose name matches this regular expression will never be
455 "List of buffers shown in Buffer Selection Menu.
469 (define-key map "F" 'bs-select-other-frame)
470 (let ((key ?1))
471 (while (<= key ?9)
472 (define-key map (char-to-string key) 'digit-argument)
473 (setq key (1+ key))))
474 (define-key map "-" 'negative-argument)
475 (define-key map "\e-" 'negative-argument)
476 (define-key map "o" 'bs-select-other-window)
477 (define-key map "\C-o" 'bs-tmp-select-other-window)
478 ;; for GNU EMACS
479 (define-key map [mouse-3] 'bs-mouse-select-other-frame)
480 ;; for XEmacs
481 (define-key map [button3] 'bs-mouse-select-other-frame)
482 (define-key map [up] 'bs-up)
483 (define-key map "n" 'bs-down)
484 (define-key map "p" 'bs-up)
485 (define-key map [down] 'bs-down)
486 (define-key map "\C-m" 'bs-select)
487 (define-key map "b" 'bs-bury-buffer)
488 (define-key map "s" 'bs-save)
489 (define-key map "S" 'bs-show-sorted)
490 (define-key map "a" 'bs-toggle-show-all)
491 (define-key map "d" 'bs-delete)
492 (define-key map "\C-d" 'bs-delete-backward)
493 (define-key map "k" 'bs-delete)
494 (define-key map "g" 'bs-refresh)
495 (define-key map "C" 'bs-set-configuration-and-refresh)
496 (define-key map "c" 'bs-select-next-configuration)
497 (define-key map "q" 'bs-kill)
498 ;; (define-key map "z" 'bs-kill)
499 (define-key map "\C-c\C-c" 'bs-kill)
500 (define-key map "\C-g" 'bs-abort)
501 (define-key map "\C-]" 'bs-abort)
502 (define-key map "%" 'bs-toggle-readonly)
503 (define-key map "~" 'bs-clear-modified)
504 (define-key map "M" 'bs-toggle-current-to-show)
505 (define-key map "+" 'bs-set-current-buffer-to-show-always)
506 ;;(define-key map "-" 'bs-set-current-buffer-to-show-never)
507 (define-key map "t" 'bs-visit-tags-table)
508 (define-key map "m" 'bs-mark-current)
509 (define-key map "u" 'bs-unmark-current)
510 (define-key map ">" 'scroll-right)
511 (define-key map "<" 'scroll-left)
512 (define-key map "?" 'bs-help)
513 map)
514 "Keymap of `bs-mode'.")
516 ;; ----------------------------------------------------------------------
517 ;; Functions
518 ;; ----------------------------------------------------------------------
520 (defun bs-buffer-list (&optional list sort-description)
521 "Return a list of buffers to be shown.
522 LIST is a list of buffers to test for appearance in Buffer Selection Menu.
523 The result list depends on the global variables `bs-dont-show-regexp',
524 `bs-must-show-regexp', `bs-dont-show-function', `bs-must-show-function'
525 and `bs-buffer-sort-function'.
526 If SORT-DESCRIPTION isn't nil the list will be sorted by
527 a special function. SORT-DESCRIPTION is an element of `bs-sort-functions'."
528 (setq sort-description (or sort-description bs--current-sort-function)
529 list (or list (buffer-list)))
530 (let ((result nil))
531 (while list
532 (let* ((buffername (buffer-name (car list)))
533 (int-show-never (string-match bs--intern-show-never buffername))
534 (ext-show-never (and bs-dont-show-regexp
535 (string-match bs-dont-show-regexp
536 buffername)))
537 (extern-must-show (or (and bs-must-always-show-regexp
538 (string-match
539 bs-must-always-show-regexp
540 buffername))
541 (and bs-must-show-regexp
542 (string-match bs-must-show-regexp
543 buffername))))
544 (extern-show-never-from-fun (and bs-dont-show-function
545 (funcall bs-dont-show-function
546 (car list))))
547 (extern-must-show-from-fun (and bs-must-show-function
548 (funcall bs-must-show-function
549 (car list))))
550 (show-flag (buffer-local-value 'bs-buffer-show-mark (car list))))
551 (if (or (eq show-flag 'always)
552 (and (or bs--show-all (not (eq show-flag 'never)))
553 (not int-show-never)
554 (or bs--show-all
555 extern-must-show
556 extern-must-show-from-fun
557 (and (not ext-show-never)
558 (not extern-show-never-from-fun)))))
559 (setq result (cons (car list)
560 result)))
561 (setq list (cdr list))))
562 (setq result (reverse result))
563 ;; The current buffer which was the start point of bs should be an element
564 ;; of result list, so that we can leave with space and be back in the
565 ;; buffer we started bs-show.
566 (if (and bs--buffer-coming-from
567 (buffer-live-p bs--buffer-coming-from)
568 (not (memq bs--buffer-coming-from result)))
569 (setq result (cons bs--buffer-coming-from result)))
570 ;; sorting
571 (if (and sort-description
572 (nth 1 sort-description))
573 (setq result (sort result (nth 1 sort-description)))
574 ;; else standard sorting
575 (bs-buffer-sort result))))
577 (defun bs-buffer-sort (buffer-list)
578 "Sort buffers in BUFFER-LIST according to `bs-buffer-sort-function'."
579 (if bs-buffer-sort-function
580 (sort buffer-list bs-buffer-sort-function)
581 buffer-list))
583 (defun bs--redisplay (&optional keep-line-p sort-description)
584 "Redisplay whole Buffer Selection Menu.
585 If KEEP-LINE-P is non-nil the point will stay on current line.
586 SORT-DESCRIPTION is an element of `bs-sort-functions'."
587 (let ((line (1+ (count-lines 1 (point)))))
588 (bs-show-in-buffer (bs-buffer-list nil sort-description))
589 (if keep-line-p
590 (goto-line line))
591 (beginning-of-line)))
593 (defun bs--goto-current-buffer ()
594 "Goto line which represents the current buffer;
595 actually the line which begins with character in `bs-string-current' or
596 `bs-string-current-marked'."
597 (let ((regexp (concat "^"
598 (regexp-quote bs-string-current)
600 (regexp-quote bs-string-current-marked)))
601 point)
602 (save-excursion
603 (goto-char (point-min))
604 (if (search-forward-regexp regexp nil t)
605 (setq point (- (point) 1))))
606 (if point
607 (goto-char point))))
609 (defun bs--current-config-message ()
610 "Return a string describing the current `bs-mode' configuration."
611 (if bs--show-all
612 "Show all buffers."
613 (format "Show buffer by configuration %S"
614 bs-current-configuration)))
616 (defun bs--track-window-changes (frame)
617 "Track window changes to refresh the buffer list.
618 Used from `window-size-change-functions'."
619 (let ((win (get-buffer-window "*buffer-selection*" frame)))
620 (when win
621 (with-selected-window win
622 (bs--set-window-height)))))
624 (defun bs--remove-hooks ()
625 "Remove `bs--track-window-changes' and auxiliary hooks."
626 (remove-hook 'window-size-change-functions 'bs--track-window-changes)
627 ;; Remove itself
628 (remove-hook 'kill-buffer-hook 'bs--remove-hooks t)
629 (remove-hook 'change-major-mode-hook 'bs--remove-hooks t))
631 (put 'bs-mode 'mode-class 'special)
633 (define-derived-mode bs-mode () "Buffer-Selection-Menu"
634 "Major mode for editing a subset of Emacs' buffers.
636 Aside from two header lines each line describes one buffer.
637 Move to a line representing the buffer you want to edit and select
639 There are many key commands similar to `Buffer-menu-mode' for
640 manipulating the buffer list and buffers.
641 For faster navigation each digit key is a digit argument.
647 remain in Buffer Selection Menu.
657 apply selected configuration.
659 available Buffer Selection Menu configuration.
663 to show always.
666 (make-local-variable 'font-lock-defaults)
667 (make-local-variable 'font-lock-verbose)
668 (make-local-variable 'font-lock-global-modes)
669 (buffer-disable-undo)
670 (setq buffer-read-only t
671 truncate-lines t
672 show-trailing-whitespace nil
673 font-lock-global-modes '(not bs-mode)
674 font-lock-defaults '(bs-mode-font-lock-keywords t)
675 font-lock-verbose nil)
676 (add-hook 'window-size-change-functions 'bs--track-window-changes)
677 (add-hook 'kill-buffer-hook 'bs--remove-hooks nil t)
678 (add-hook 'change-major-mode-hook 'bs--remove-hooks nil t))
680 (defun bs--restore-window-config ()
681 "Restore window configuration on the current frame."
682 (when bs--window-config-coming-from
683 (let ((frame (selected-frame)))
684 (unwind-protect
685 (set-window-configuration bs--window-config-coming-from)
686 (select-frame frame)))
687 (setq bs--window-config-coming-from nil)))
689 (defun bs-kill ()
690 "Let buffer disappear and reset window configuration."
691 (interactive)
692 (bury-buffer (current-buffer))
693 (bs--restore-window-config))
695 (defun bs-abort ()
696 "Ding and leave Buffer Selection Menu without a selection."
697 (interactive)
698 (ding)
699 (bs-kill))
701 (defun bs-set-configuration-and-refresh ()
702 "Ask user for a configuration and apply selected configuration.
703 Refresh whole Buffer Selection Menu."
704 (interactive)
705 (call-interactively 'bs-set-configuration)
706 (bs--redisplay t))
708 (defun bs-refresh ()
709 "Refresh whole Buffer Selection Menu."
710 (interactive)
711 (bs--redisplay t))
713 (defun bs--set-window-height ()
714 "Change the height of the selected window to suit the current buffer list."
715 (unless (one-window-p t)
716 (fit-window-to-buffer (selected-window) bs-max-window-height)))
718 (defun bs--current-buffer ()
719 "Return buffer on current line.
720 Raise an error if not on a buffer line."
721 (beginning-of-line)
722 (let ((line (+ (- bs-header-lines-length)
723 (count-lines 1 (point)))))
724 (if (< line 0)
725 (error "You are on a header row"))
726 (nth line bs-current-list)))
728 (defun bs--update-current-line ()
729 "Update the entry on current line for Buffer Selection Menu."
730 (let ((buffer (bs--current-buffer))
731 (inhibit-read-only t))
732 (beginning-of-line)
733 (delete-region (point) (line-end-position))
734 (bs--insert-one-entry buffer)
735 (beginning-of-line)))
737 (defun bs-view ()
738 "View current line's buffer in View mode.
739 Leave Buffer Selection Menu."
740 (interactive)
741 (view-buffer (bs--current-buffer)))
743 (defun bs-select ()
744 "Select current line's buffer and other marked buffers.
745 If there are no marked buffers the window configuration before starting
746 Buffer Selection Menu will be restored.
747 If there are marked buffers each marked buffer and the current line's buffer
748 will be selected in a window.
749 Leave Buffer Selection Menu."
750 (interactive)
751 (let ((buffer (bs--current-buffer)))
752 (bury-buffer (current-buffer))
753 (bs--restore-window-config)
754 (switch-to-buffer buffer)
755 (if bs--marked-buffers
756 ;; Some marked buffers for selection
757 (let* ((all (delq buffer bs--marked-buffers))
758 (height (/ (1- (frame-height)) (1+ (length all)))))
759 (delete-other-windows)
760 (switch-to-buffer buffer)
761 (while all
762 (split-window nil height)
763 (other-window 1)
764 (switch-to-buffer (car all))
765 (setq all (cdr all)))
766 ;; goto window we have started bs.
767 (other-window 1)))))
769 (defun bs-select-other-window ()
770 "Select current line's buffer by `switch-to-buffer-other-window'.
771 The window configuration before starting Buffer Selection Menu will be restored
772 unless there is no other window. In this case a new window will be created.
773 Leave Buffer Selection Menu."
774 (interactive)
775 (let ((buffer (bs--current-buffer)))
776 (bury-buffer (current-buffer))
777 (bs--restore-window-config)
778 (switch-to-buffer-other-window buffer)))
780 (defun bs-tmp-select-other-window ()
781 "Make the other window select this line's buffer.
782 The current window remains selected."
783 (interactive)
784 (let ((buffer (bs--current-buffer)))
785 (display-buffer buffer t)))
787 (defun bs-select-other-frame ()
788 "Select current line's buffer in new created frame.
789 Leave Buffer Selection Menu."
790 (interactive)
791 (let ((buffer (bs--current-buffer)))
792 (bury-buffer (current-buffer))
793 (bs--restore-window-config)
794 (switch-to-buffer-other-frame buffer)))
796 (defun bs-mouse-select-other-frame (event)
797 "Select selected line's buffer in new created frame.
798 Leave Buffer Selection Menu.
799 EVENT: a mouse click event."
800 (interactive "e")
801 (mouse-set-point event)
802 (bs-select-other-frame))
804 (defun bs-mouse-select (event)
805 "Select buffer on mouse click EVENT.
806 Select buffer by `bs-select'."
807 (interactive "e")
808 (mouse-set-point event)
809 (bs-select))
811 (defun bs-select-in-one-window ()
812 "Select current line's buffer in one window and delete other windows.
813 Leave Buffer Selection Menu."
814 (interactive)
815 (bs-select)
816 (delete-other-windows))
818 (defun bs-bury-buffer ()
819 "Bury buffer on current line."
820 (interactive)
821 (bury-buffer (bs--current-buffer))
822 (bs--redisplay t))
824 (defun bs-save ()
825 "Save buffer on current line."
826 (interactive)
827 (let ((buffer (bs--current-buffer)))
828 (save-excursion
829 (set-buffer buffer)
830 (save-buffer))
831 (bs--update-current-line)))
833 (defun bs-visit-tags-table ()
834 "Visit the tags table in the buffer on this line.
835 See `visit-tags-table'."
836 (interactive)
837 (let ((file (buffer-file-name (bs--current-buffer))))
838 (if file
839 (visit-tags-table file)
840 (error "Specified buffer has no file"))))
842 (defun bs-toggle-current-to-show ()
843 "Toggle status of showing flag for buffer in current line."
844 (interactive)
845 (let ((buffer (bs--current-buffer))
846 res)
847 (save-excursion
848 (set-buffer buffer)
849 (setq res (cond ((null bs-buffer-show-mark)
850 'never)
851 ((eq bs-buffer-show-mark 'never)
852 'always)
853 (t nil)))
854 (setq bs-buffer-show-mark res))
855 (bs--update-current-line)
856 (bs--set-window-height)
857 (bs--show-config-message res)))
859 (defun bs-set-current-buffer-to-show-always (&optional not-to-show-p)
860 "Toggle status of buffer on line to `always shown'.
861 NOT-TO-SHOW-P: prefix argument.
862 With no prefix argument the buffer on current line is marked to show
863 always. Otherwise it is marked to show never."
864 (interactive "P")
865 (if not-to-show-p
866 (bs-set-current-buffer-to-show-never)
867 (bs--set-toggle-to-show (bs--current-buffer) 'always)))
869 (defun bs-set-current-buffer-to-show-never ()
870 "Toggle status of buffer on line to `never shown'."
871 (interactive)
872 (bs--set-toggle-to-show (bs--current-buffer) 'never))
874 (defun bs--set-toggle-to-show (buffer what)
875 "Set value `bs-buffer-show-mark' of buffer BUFFER to WHAT.
876 Redisplay current line and display a message describing
877 the status of buffer on current line."
878 (with-current-buffer buffer (setq bs-buffer-show-mark what))
879 (bs--update-current-line)
880 (bs--set-window-height)
881 (bs--show-config-message what))
883 (defun bs-mark-current (count)
884 "Mark buffers.
885 COUNT is the number of buffers to mark.
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 (cons buffer bs--marked-buffers)))
894 (bs--update-current-line)
895 (bs-down dir))
896 (setq count (1- count)))))
898 (defun bs-unmark-current (count)
899 "Unmark buffers.
900 COUNT is the number of buffers to unmark.
901 Move cursor vertically down COUNT lines."
902 (interactive "p")
903 (let ((dir (if (> count 0) 1 -1))
904 (count (abs count)))
905 (while (> count 0)
906 (let ((buffer (bs--current-buffer)))
907 (if buffer
908 (setq bs--marked-buffers (delq buffer bs--marked-buffers)))
909 (bs--update-current-line)
910 (bs-down dir))
911 (setq count (1- count)))))
913 (defun bs--show-config-message (what)
914 "Show message indicating the new showing status WHAT.
915 WHAT is a value of nil, `never', or `always'."
916 (bs-message-without-log (cond ((null what)
917 "Buffer will be shown normally.")
918 ((eq what 'never)
919 "Mark buffer to never be shown.")
920 (t "Mark buffer to show always."))))
922 (defun bs-delete ()
923 "Kill buffer on current line."
924 (interactive)
925 (let ((current (bs--current-buffer))
926 (inhibit-read-only t))
927 (unless (kill-buffer current)
928 (error "Buffer was not deleted"))
929 (setq bs-current-list (delq current bs-current-list))
930 (beginning-of-line)
931 (delete-region (point) (save-excursion
932 (end-of-line)
933 (if (eobp) (point) (1+ (point)))))
934 (if (eobp)
935 (progn
936 (backward-delete-char 1)
937 (beginning-of-line)
938 (recenter -1)))
939 (bs--set-window-height)))
941 (defun bs-delete-backward ()
942 "Like `bs-delete' but go to buffer in front of current."
943 (interactive)
944 (let ((on-last-line-p (save-excursion (end-of-line) (eobp))))
945 (bs-delete)
946 (unless on-last-line-p
947 (bs-up 1))))
949 (defun bs-show-sorted ()
950 "Show buffer list sorted by next sort aspect."
951 (interactive)
952 (setq bs--current-sort-function
953 (bs-next-config-aux (car bs--current-sort-function)
954 bs-sort-functions))
955 (bs--redisplay)
956 (bs--goto-current-buffer)
957 (bs-message-without-log "Sorted %s" (car bs--current-sort-function)))
959 (defun bs-apply-sort-faces (&optional sort-description)
960 "Set text properties for the sort described by SORT-DESCRIPTION.
961 SORT-DESCRIPTION is an element of `bs-sort-functions'.
962 Default is `bs--current-sort-function'."
963 (let ((sort-description (or sort-description
964 bs--current-sort-function)))
965 (save-excursion
966 (goto-char (point-min))
967 (if (and (nth 2 sort-description)
968 (search-forward-regexp (nth 2 sort-description) nil t))
969 (let ((inhibit-read-only t))
970 (put-text-property (match-beginning 0)
971 (match-end 0)
972 'face
973 (or (nth 3 sort-description)
974 'region)))))))
976 (defun bs-toggle-show-all ()
977 "Toggle show all buffers / show buffers with current configuration."
978 (interactive)
979 (setq bs--show-all (not bs--show-all))
980 (bs--redisplay)
981 (bs--goto-current-buffer)
982 (bs-message-without-log "%s" (bs--current-config-message)))
984 (defun bs-toggle-readonly ()
985 "Toggle read-only status for buffer on current line.
986 Uses function `vc-toggle-read-only'."
987 (interactive)
988 (let ((buffer (bs--current-buffer)))
989 (save-excursion
990 (set-buffer buffer)
991 (vc-toggle-read-only))
992 (bs--update-current-line)))
994 (defun bs-clear-modified ()
995 "Set modified flag for buffer on current line to nil."
996 (interactive)
997 (let ((buffer (bs--current-buffer)))
998 (save-excursion
999 (set-buffer buffer)
1000 (set-buffer-modified-p nil)))
1001 (bs--update-current-line))
1003 (defun bs--nth-wrapper (count fun &rest args)
1004 "Call COUNT times function FUN with arguments ARGS."
1005 (setq count (or count 1))
1006 (while (> count 0)
1007 (apply fun args)
1008 (setq count (1- count))))
1010 (defun bs-up (arg)
1011 "Move cursor vertically up ARG lines in Buffer Selection Menu."
1012 (interactive "p")
1013 (if (and arg (numberp arg) (< arg 0))
1014 (bs--nth-wrapper (- arg) 'bs--down)
1015 (bs--nth-wrapper arg 'bs--up)))
1017 (defun bs--up ()
1018 "Move cursor vertically up one line.
1019 If on top of buffer list go to last line."
1020 (if (> (count-lines 1 (point)) bs-header-lines-length)
1021 (forward-line -1)
1022 (goto-char (point-max))
1023 (beginning-of-line)
1024 (recenter -1)))
1026 (defun bs-down (arg)
1027 "Move cursor vertically down ARG lines in Buffer Selection Menu."
1028 (interactive "p")
1029 (if (and arg (numberp arg) (< arg 0))
1030 (bs--nth-wrapper (- arg) 'bs--up)
1031 (bs--nth-wrapper arg 'bs--down)))
1033 (defun bs--down ()
1034 "Move cursor vertically down one line.
1035 If at end of buffer list go to first line."
1036 (if (eq (line-end-position) (point-max))
1037 (goto-line (1+ bs-header-lines-length))
1038 (forward-line 1)))
1040 (defun bs-visits-non-file (buffer)
1041 "Return whether BUFFER visits no file.
1042 A value of t means BUFFER belongs to no file.
1043 A value of nil means BUFFER belongs to a file."
1044 (not (buffer-file-name buffer)))
1046 (defun bs-sort-buffer-interns-are-last (b1 b2)
1047 "Function for sorting internal buffers at the end of all buffers."
1050 ;; ----------------------------------------------------------------------
1051 ;; Configurations:
1052 ;; ----------------------------------------------------------------------
1054 (defun bs-config-clear ()
1055 "Reset all variables which specify a configuration.
1056 These variables are `bs-dont-show-regexp', `bs-must-show-regexp',
1057 `bs-dont-show-function', `bs-must-show-function' and
1058 `bs-buffer-sort-function'."
1059 (setq bs-dont-show-regexp nil
1060 bs-must-show-regexp nil
1061 bs-dont-show-function nil
1062 bs-must-show-function nil
1063 bs-buffer-sort-function nil))
1065 (defun bs-config--only-files ()
1066 "Define a configuration for showing only buffers visiting a file."
1067 (bs-config-clear)
1068 (setq ;; I want to see *-buffers at the end
1069 bs-buffer-sort-function 'bs-sort-buffer-interns-are-last
1070 ;; Don't show files who don't belong to a file
1071 bs-dont-show-function 'bs-visits-non-file))
1073 (defun bs-config--files-and-scratch ()
1074 "Define a configuration for showing buffer *scratch* and file buffers."
1075 (bs-config-clear)
1076 (setq ;; I want to see *-buffers at the end
1077 bs-buffer-sort-function 'bs-sort-buffer-interns-are-last
1078 ;; Don't show files who don't belong to a file
1079 bs-dont-show-function 'bs-visits-non-file
1080 ;; Show *scratch* buffer.
1083 (defun bs-config--all ()
1084 "Define a configuration for showing all buffers.
1085 Reset all according variables by `bs-config-clear'."
1086 (bs-config-clear))
1088 (defun bs-config--all-intern-last ()
1089 "Define a configuration for showing all buffers.
1090 Internal buffers appear at end of all buffers."
1091 (bs-config-clear)
1092 ;; I want to see *-buffers at the end
1093 (setq bs-buffer-sort-function 'bs-sort-buffer-interns-are-last))
1095 (defun bs-set-configuration (name)
1096 "Set configuration to the one saved under string NAME in `bs-configurations'.
1097 When called interactively ask user for a configuration and apply selected
1098 configuration."
1099 (interactive (list (completing-read "Use configuration: "
1100 bs-configurations
1101 nil
1102 t)))
1103 (let ((list (assoc name bs-configurations)))
1104 (if list
1105 (if (listp list)
1106 (setq bs-current-configuration name
1107 bs-must-show-regexp (nth 1 list)
1108 bs-must-show-function (nth 2 list)
1109 bs-dont-show-regexp (nth 3 list)
1110 bs-dont-show-function (nth 4 list)
1111 bs-buffer-sort-function (nth 5 list))
1112 ;; for backward compability
1113 (funcall (cdr list)))
1114 ;; else
1115 (ding)
1116 (bs-message-without-log "No bs-configuration named %S." name))))
1118 (defun bs-help ()
1119 "Help for `bs-show'."
1120 (interactive)
1121 (describe-function 'bs-mode))
1123 (defun bs-next-config-aux (start-name list)
1124 "Get the next assoc after START-NAME in list LIST.
1125 Will return the first if START-NAME is at end."
1126 (let ((assocs list)
1127 (length (length list))
1128 pos)
1129 (while (and assocs (not pos))
1130 (if (string= (car (car assocs)) start-name)
1131 (setq pos (- length (length assocs))))
1132 (setq assocs (cdr assocs)))
1133 (setq pos (1+ pos))
1134 (if (eq pos length)
1135 (car list)
1136 (nth pos list))))
1138 (defun bs-next-config (name)
1139 "Return next configuration with respect to configuration with name NAME."
1140 (bs-next-config-aux name bs-configurations))
1142 (defun bs-select-next-configuration (&optional start-name)
1143 "Apply next configuration START-NAME and refresh buffer list.
1144 If START-NAME is nil the current configuration `bs-current-configuration'
1145 will be used."
1146 (interactive)
1147 (let ((config (bs-next-config (or start-name bs-current-configuration))))
1148 (bs-set-configuration (car config))
1149 (setq bs-default-configuration bs-current-configuration)
1150 (bs--redisplay t)
1151 (bs--set-window-height)
1152 (bs-message-without-log "Selected configuration: %s" (car config))))
1154 (defun bs-show-in-buffer (list)
1155 "Display buffer list LIST in buffer *buffer-selection*.
1156 Select buffer *buffer-selection* and display buffers according to current
1157 configuration `bs-current-configuration'. Set window height, fontify buffer
1158 and move point to current buffer."
1159 (setq bs-current-list list)
1160 (switch-to-buffer (get-buffer-create "*buffer-selection*"))
1161 (bs-mode)
1162 (let* ((inhibit-read-only t)
1163 (map-fun (lambda (entry)
1164 (length (buffer-name entry))))
1165 (max-length-of-names (apply 'max
1166 (cons 0 (mapcar map-fun list))))
1167 (name-entry-length (min bs-maximal-buffer-name-column
1168 (max bs-minimal-buffer-name-column
1169 max-length-of-names))))
1170 (erase-buffer)
1171 (setq bs--name-entry-length name-entry-length)
1172 (bs--show-header)
1173 (while list
1174 (bs--insert-one-entry (car list))
1176 (setq list (cdr list)))
1177 (delete-backward-char 1)
1178 (bs--set-window-height)
1179 (bs--goto-current-buffer)
1180 (font-lock-fontify-buffer)
1181 (bs-apply-sort-faces)
1182 (set-buffer-modified-p nil)))
1184 (defun bs-next-buffer (&optional buffer-list sorting-p)
1185 "Return next buffer and buffer list for buffer cycling in BUFFER-LIST.
1186 Ignore sorting when SORTING-P is nil.
1187 If BUFFER-LIST is nil the result of `bs-buffer-list' will be used as
1188 buffer list. The result is a cons of normally the second element of
1189 BUFFER-LIST and the buffer list used for buffer cycling."
1190 (let* ((bs--current-sort-function (if sorting-p
1191 bs--current-sort-function))
1192 (bs-buffer-list (or buffer-list (bs-buffer-list))))
1193 (cons (or (car (cdr bs-buffer-list))
1194 (car bs-buffer-list)
1195 (current-buffer))
1196 bs-buffer-list)))
1198 (defun bs-previous-buffer (&optional buffer-list sorting-p)
1199 "Return previous buffer and buffer list for buffer cycling in BUFFER-LIST.
1200 Ignore sorting when SORTING-P is nil.
1201 If BUFFER-LIST is nil the result of `bs-buffer-list' will be used as
1202 buffer list. The result is a cons of last element of BUFFER-LIST and the
1203 buffer list used for buffer cycling."
1204 (let* ((bs--current-sort-function (if sorting-p
1205 bs--current-sort-function))
1206 (bs-buffer-list (or buffer-list (bs-buffer-list))))
1207 (cons (or (car (last bs-buffer-list))
1208 (current-buffer))
1209 bs-buffer-list)))
1211 (defun bs-message-without-log (&rest args)
1212 "Like `message' but don't log it on the message log.
1213 All arguments ARGS are transferred to function `message'."
1214 (let ((message-log-max nil))
1215 (apply 'message args)))
1217 (defvar bs--cycle-list nil
1218 "Current buffer list used for cycling.")
1220 ;;;###autoload
1221 (defun bs-cycle-next ()
1222 "Select next buffer defined by buffer cycling.
1223 The buffers taking part in buffer cycling are defined
1224 by buffer configuration `bs-cycle-configuration-name'."
1225 (interactive)
1226 (let ((bs--buffer-coming-from (current-buffer))
1227 (bs-dont-show-regexp bs-dont-show-regexp)
1228 (bs-must-show-regexp bs-must-show-regexp)
1229 (bs-dont-show-function bs-dont-show-function)
1230 (bs-must-show-function bs-must-show-function)
1231 (bs--show-all nil))
1232 (bs-set-configuration (or bs-cycle-configuration-name bs-default-configuration))
1233 (let ((bs-buffer-sort-function nil)
1234 (bs--current-sort-function nil))
1235 (let* ((tupel (bs-next-buffer (if (or (eq last-command
1236 'bs-cycle-next)
1237 (eq last-command
1238 'bs-cycle-previous))
1239 bs--cycle-list)))
1240 (next (car tupel))
1241 (cycle-list (cdr tupel)))
1242 (unless (window-dedicated-p (selected-window))
1243 ;; We don't want the frame iconified if the only window in the frame
1244 ;; happens to be dedicated; let's get the error from switch-to-buffer
1245 (bury-buffer))
1246 (switch-to-buffer next)
1247 (setq bs--cycle-list (append (cdr cycle-list)
1248 (list (car cycle-list))))
1249 (bs-message-without-log "Next buffers: %s"
1250 (or (cdr bs--cycle-list)
1251 "this buffer"))))))
1253 ;;;###autoload
1254 (defun bs-cycle-previous ()
1255 "Select previous buffer defined by buffer cycling.
1256 The buffers taking part in buffer cycling are defined
1257 by buffer configuration `bs-cycle-configuration-name'."
1258 (interactive)
1259 (let ((bs--buffer-coming-from (current-buffer))
1260 (bs-dont-show-regexp bs-dont-show-regexp)
1261 (bs-must-show-regexp bs-must-show-regexp)
1262 (bs-dont-show-function bs-dont-show-function)
1263 (bs-must-show-function bs-must-show-function)
1264 (bs--show-all nil))
1265 (bs-set-configuration (or bs-cycle-configuration-name bs-default-configuration))
1266 (let ((bs-buffer-sort-function nil)
1267 (bs--current-sort-function nil))
1268 (let* ((tupel (bs-previous-buffer (if (or (eq last-command
1269 'bs-cycle-next)
1270 (eq last-command
1271 'bs-cycle-previous))
1272 bs--cycle-list)))
1273 (prev-buffer (car tupel))
1274 (cycle-list (cdr tupel)))
1275 (switch-to-buffer prev-buffer)
1276 (setq bs--cycle-list (append (last cycle-list)
1277 (reverse (cdr (reverse cycle-list)))))
1278 (bs-message-without-log "Previous buffers: %s"
1279 (or (reverse (cdr bs--cycle-list))
1280 "this buffer"))))))
1282 (defun bs--get-value (fun &optional args)
1283 "Apply function FUN with arguments ARGS.
1284 Return result of evaluation. Will return FUN if FUN is a number
1285 or a string."
1286 (cond ((numberp fun)
1287 fun)
1288 ((stringp fun)
1289 fun)
1290 (t (apply fun args))))
1292 (defun bs--get-marked-string (start-buffer all-buffers)
1293 "Return a string which describes whether current buffer is marked.
1294 START-BUFFER is the buffer where we started buffer selection.
1295 ALL-BUFFERS is the list of buffers appearing in Buffer Selection Menu.
1296 The result string is one of `bs-string-current', `bs-string-current-marked',
1297 `bs-string-marked', `bs-string-show-normally', `bs-string-show-never', or
1298 `bs-string-show-always'."
1299 (cond ;; current buffer is the buffer we started buffer selection.
1300 ((eq (current-buffer) start-buffer)
1301 (if (memq (current-buffer) bs--marked-buffers)
1302 bs-string-current-marked ; buffer is marked
1303 bs-string-current))
1304 ;; current buffer is marked
1305 ((memq (current-buffer) bs--marked-buffers)
1306 bs-string-marked)
1307 ;; current buffer hasn't a special mark.
1308 ((null bs-buffer-show-mark)
1309 bs-string-show-normally)
1310 ;; current buffer has a mark not to show itself.
1311 ((eq bs-buffer-show-mark 'never)
1312 bs-string-show-never)
1313 ;; otherwise current buffer is marked to show always.
1314 (t
1315 bs-string-show-always)))
1317 (defun bs--get-modified-string (start-buffer all-buffers)
1318 "Return a string which describes whether current buffer is modified.
1319 START-BUFFER is the buffer where we started buffer selection.
1320 ALL-BUFFERS is the list of buffers appearing in Buffer Selection Menu."
1321 (if (buffer-modified-p) "*" " "))
1323 (defun bs--get-readonly-string (start-buffer all-buffers)
1324 "Return a string which describes whether current buffer is read only.
1325 START-BUFFER is the buffer where we started buffer selection.
1326 ALL-BUFFERS is the list of buffers appearing in Buffer Selection Menu."
1327 (if buffer-read-only "%" " "))
1329 (defun bs--get-size-string (start-buffer all-buffers)
1330 "Return a string which describes the size of current buffer.
1331 START-BUFFER is the buffer where we started buffer selection.
1332 ALL-BUFFERS is the list of buffers appearing in Buffer Selection Menu."
1333 (int-to-string (buffer-size)))
1335 (defun bs--get-name (start-buffer all-buffers)
1336 "Return name of current buffer for Buffer Selection Menu.
1337 The name of current buffer gets additional text properties
1338 for mouse highlighting.
1339 START-BUFFER is the buffer where we started buffer selection.
1340 ALL-BUFFERS is the list of buffers appearing in Buffer Selection Menu."
1341 (propertize (buffer-name)
1342 'help-echo "mouse-2: select this buffer, mouse-3: select in other frame"
1343 'mouse-face 'highlight))
1345 (defun bs--get-mode-name (start-buffer all-buffers)
1346 "Return the name of mode of current buffer for Buffer Selection Menu.
1347 START-BUFFER is the buffer where we started buffer selection.
1348 ALL-BUFFERS is the list of buffers appearing in Buffer Selection Menu."
1349 mode-name)
1351 (defun bs--get-file-name (start-buffer all-buffers)
1352 "Return string for column 'File' in Buffer Selection Menu.
1353 This is the variable `buffer-file-name' of current buffer.
1354 If current mode is `dired-mode' or `shell-mode' it returns the
1355 default directory.
1356 START-BUFFER is the buffer where we started buffer selection.
1357 ALL-BUFFERS is the list of buffers appearing in Buffer Selection Menu."
1358 (propertize (if (member major-mode '(shell-mode dired-mode))
1359 default-directory
1360 (or buffer-file-name ""))
1361 'mouse-face 'highlight
1362 'help-echo "mouse-2: select this buffer, mouse-3: select in other frame"))
1364 (defun bs--insert-one-entry (buffer)
1365 "Generate one entry for buffer BUFFER in Buffer Selection Menu.
1366 It goes over all columns described in `bs-attributes-list'
1367 and evaluates corresponding string. Inserts string in current buffer;
1368 normally *buffer-selection*."
1369 (let ((string "")
1370 (columns bs-attributes-list)
1371 (to-much 0)
1372 (apply-args (append (list bs--buffer-coming-from bs-current-list))))
1373 (save-excursion
1374 (while columns
1375 (set-buffer buffer)
1376 (let ((min (bs--get-value (nth 1 (car columns))))
1377 ;;(max (bs--get-value (nth 2 (car columns)))) refered no more
1378 (align (nth 3 (car columns)))
1379 (fun (nth 4 (car columns)))
1380 (val nil)
1381 new-string)
1382 (setq val (bs--get-value fun apply-args))
1383 (setq new-string (bs--format-aux val align (- min to-much)))
1384 (setq string (concat string new-string))
1385 (if (> (length new-string) min)
1386 (setq to-much (- (length new-string) min)))
1387 ) ; let
1388 (setq columns (cdr columns))))
1389 (insert string)
1390 string))
1392 (defun bs--format-aux (string align len)
1393 "Pad STRING to length LEN with alignment ALIGN.
1394 ALIGN is one of the symbols `left', `middle', or `right'."
1395 (let* ((width (length string))
1396 (len (max len width)))
1397 (format (format "%%%s%ds" (if (eq align 'right) "" "-") len)
1398 (if (eq align 'middle)
1399 (concat (make-string (/ (- len width) 2) ?\s) string)
1400 string))))
1402 (defun bs--show-header ()
1403 "Insert header for Buffer Selection Menu in current buffer."
1404 (dolist (string (bs--create-header))
1407 (defun bs--get-name-length ()
1408 "Return value of `bs--name-entry-length'."
1409 bs--name-entry-length)
1411 (defun bs--create-header ()
1412 "Return all header lines used in Buffer Selection Menu as a list of strings."
1413 (list (mapconcat (lambda (column)
1414 (bs--format-aux (bs--get-value (car column))
1415 (nth 3 column) ; align
1416 (bs--get-value (nth 1 column))))
1417 bs-attributes-list
1418 "")
1419 (mapconcat (lambda (column)
1420 (let ((length (length (bs--get-value (car column)))))
1421 (bs--format-aux (make-string length ?-)
1422 (nth 3 column) ; align
1423 (bs--get-value (nth 1 column)))))
1424 bs-attributes-list
1425 "")))
1427 (defun bs--show-with-configuration (name &optional arg)
1428 "Display buffer list of configuration with name NAME.
1429 Set configuration NAME and determine window for Buffer Selection Menu.
1430 Unless current buffer is buffer *buffer-selection* we have to save
1431 the buffer we started Buffer Selection Menu and the current window
1432 configuration to restore buffer and window configuration after a
1433 selection. If there is already a window displaying *buffer-selection*
1434 select this window for Buffer Selection Menu. Otherwise open a new
1435 window.
1436 The optional argument ARG is the prefix argument when calling a function
1437 for buffer selection."
1438 (bs-set-configuration name)
1439 (let ((bs--show-all (or bs--show-all arg)))
1440 (unless (string= "*buffer-selection*" (buffer-name))
1441 ;; Only when not in buffer *buffer-selection*
1442 ;; we have to set the buffer we started the command
1443 (setq bs--buffer-coming-from (current-buffer)))
1444 (let ((liste (bs-buffer-list))
1445 (active-window (get-window-with-predicate
1446 (lambda (w)
1447 (string= (buffer-name (window-buffer w))
1448 "*buffer-selection*"))
1449 nil (selected-frame))))
1450 (if active-window
1451 (select-window active-window)
1452 (bs--restore-window-config)
1453 (setq bs--window-config-coming-from (current-window-configuration))
1454 (when (> (window-height (selected-window)) 7)
1455 (split-window-vertically)
1456 (other-window 1)))
1457 (bs-show-in-buffer liste)
1458 (bs-message-without-log "%s" (bs--current-config-message)))))
1460 (defun bs--configuration-name-for-prefix-arg (prefix-arg)
1461 "Convert prefix argument PREFIX-ARG to a name of a buffer configuration.
1462 If PREFIX-ARG is nil return `bs-default-configuration'.
1463 If PREFIX-ARG is an integer return PREFIX-ARG element of `bs-configurations'.
1464 Otherwise return `bs-alternative-configuration'."
1465 (cond ;; usually activation
1466 ((null prefix-arg)
1467 bs-default-configuration)
1468 ;; call with integer as prefix argument
1469 ((integerp prefix-arg)
1470 (if (and (< 0 prefix-arg) (<= prefix-arg (length bs-configurations)))
1471 (car (nth (1- prefix-arg) bs-configurations))
1472 bs-default-configuration))
1473 ;; call by prefix argument C-u
1474 (t bs-alternative-configuration)))
1476 ;; ----------------------------------------------------------------------
1477 ;; Main function bs-customize and bs-show
1478 ;; ----------------------------------------------------------------------
1480 ;;;###autoload
1481 (defun bs-customize ()
1482 "Customization of group bs for Buffer Selection Menu."
1483 (interactive)
1484 (customize-group "bs"))
1486 ;;;###autoload
1487 (defun bs-show (arg)
1488 "Make a menu of buffers so you can manipulate buffers or the buffer list.
1490 There are many key commands similar to `Buffer-menu-mode' for
1491 manipulating the buffer list and the buffers themselves.
1492 User can move with [up] or [down], select a buffer
1496 With prefix argument ARG show a different buffer list. Function
1497 `bs--configuration-name-for-prefix-arg' determine accordingly
1498 name of buffer configuration."
1499 (interactive "P")
1500 (setq bs--marked-buffers nil)
1501 (bs--show-with-configuration (bs--configuration-name-for-prefix-arg arg)))
1503 ;; Now provide feature bs
1504 (provide 'bs)
1506 ;;; arch-tag: c0d9ab34-bf06-4368-ae9d-af88878e6802
1507 ;;; bs.el ends here