| blob | ab46f205fbaa2d117ef3ea9a0912feb6f60b6518 |
1 ;;; bs.el --- menu for selecting and displaying buffers
3 ;; Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
4 ;; Author: Olaf Sylvester <Olaf.Sylvester@netsurf.de>
5 ;; Maintainer: Olaf Sylvester <Olaf.Sylvester@netsurf.de>
6 ;; Keywords: convenience
8 ;; This file is part of GNU Emacs.
10 ;; GNU Emacs is free software; you can redistribute it and/or modify
11 ;; it under the terms of the GNU General Public License as published by
12 ;; the Free Software Foundation; either version 2, or (at your option)
13 ;; any later version.
15 ;; GNU Emacs is distributed in the hope that it will be useful,
16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 ;; GNU General Public License for more details.
20 ;; You should have received a copy of the GNU General Public License
21 ;; along with GNU Emacs; see the file COPYING. If not, write to the
22 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 ;; Boston, MA 02111-1307, USA.
25 ;;; Commentary:
27 ;; Version: 1.17
28 ;; X-URL: http://home.netsurf.de/olaf.sylvester/emacs
29 ;;
30 ;; The bs-package contains a main function bs-show for poping up a
31 ;; buffer in a way similar to `list-buffers' and `electric-buffer-list':
32 ;; The new buffer offers a Buffer Selection Menu for manipulating
33 ;; the buffer list and buffers.
34 ;;
35 ;; -----------------------------------------------------------------------
36 ;; | MR Buffer Size Mode File |
37 ;; | -- ------ ---- ---- ---- |
38 ;; |. bs.el 14690 Emacs-Lisp /home/sun/sylvester/el/bs.e$|
39 ;; | % executable.el 9429 Emacs-Lisp /usr/share/emacs/19.34/lisp$|
40 ;; | % vc.el 104893 Emacs-Lisp /usr/share/emacs/19.34/lisp$|
41 ;; | % test_vc.el 486 Emacs-Lisp /home/sun/sylvester/el/test$|
42 ;; | % vc-hooks.el 43605 Emacs-Lisp /usr/share/emacs/19.34/lisp$|
43 ;; -----------------------------------------------------------------------
45 ;;; Quick Installation und Customization:
47 ;; Use
48 ;; M-x bs-show
49 ;; for buffer selection or optional bind a key to main function `bs-show'
50 ;; (global-set-key "\C-x\C-b" 'bs-show) ;; or another key
51 ;;
52 ;; For customization use
53 ;; M-x bs-customize
56 ;;; More Commentary:
58 ;; bs-show will generate a new buffer named *buffer-selection*, which shows
59 ;; all buffers or a subset of them, and has possibilities for deleting,
60 ;; saving and selecting buffers. For more details see docstring of
61 ;; function `bs-mode'. A current configuration describes which buffers appear
62 ;; in *buffer-selection*. See docstring of variable `bs-configurations' for
63 ;; more details.
64 ;;
65 ;; The package bs combines the advantages of the Emacs functions
66 ;; `list-buffers' and `electric-buffer-list'.
67 ;;
68 ;; Additional features for Buffer Selection Menu:
69 ;; - configurable list of buffers (show only files etc.).
70 ;; - comfortable way to change displayed subset of all buffers.
71 ;; - show sorted list of buffers.
72 ;; - cyclic navigation:
73 ;; - goes to top of buffer list if you are on last line and press down.
74 ;; - goes to end of buffer list if you are on first line and press up.
75 ;; - Offer an alternative buffer list by prefix key C-u.
77 ;;; Cycling through buffers
79 ;; This package offers two functions for buffer cycling. If you want to cycle
80 ;; through buffer list you can use `bs-cycle-next' or `bs-cycle-previous'.
81 ;; Bind these function to a key like
82 ;; (global-set-key [(f9)] 'bs-cycle-previous)
83 ;; (global-set-key [(f10)] 'bs-cycle-next)
84 ;;
85 ;; Both functions use a special subset of all buffers for cycling to avoid
86 ;; to go through internal buffers like *Messages*.
87 ;;
88 ;; Cycling through buffers ignores sorting because sorting destroys
89 ;; the logical buffer list. If buffer list is sorted by size you
90 ;; won't be able to cycle to the smallest buffer.
92 ;;; Customization:
94 ;; There is a customization group called `bs' in group `convenience'.
95 ;; Start customization by M-x bs-customize
96 ;;
97 ;; Buffer list
98 ;; -----------
99 ;; You can define your own configurations by extending variable
100 ;; `bs-configurations' (see docstring for details).
101 ;;
102 ;; `bs-default-configuration' contains the name of default configuration.
103 ;; The default value is "files" which means to show only files.
104 ;;
105 ;; If you always want to see all buffers, customize variable
106 ;; `bs-default-configuration' in customization group `bs'.
107 ;;
108 ;; Configure sorting
109 ;; -----------------
110 ;; You can define functions for sorting the buffer list.
111 ;; When selecting buffers, you can step through available sorting
112 ;; methods with key 'S'.
113 ;; To define a new way of sorting, customize variable `bs-sort-functions'.
114 ;;
115 ;; There are four basic functions for sorting:
116 ;; by buffer name, by mode, by size, or by filename
117 ;;
118 ;; Configure buffer cycling
119 ;; ------------------------
120 ;; When cycling through buffer list the functions for cycling will use
121 ;; the current configuration of bs to calculate the buffer list.
122 ;; If you want to use a different configuration for cycling you have to set
123 ;; the variable `bs-cycle-configuration-name'. You can customize this variable.
124 ;;
125 ;; For example: If you use the configuration called "files-and-scratch" you
126 ;; can cycle through all file buffers and *scratch* although your current
127 ;; configuration perhaps is "files" which ignores buffer *scratch*.
129 ;;; History:
131 ;;; Code:
133 ;; ----------------------------------------------------------------------
134 ;; Globals for customization
135 ;; ----------------------------------------------------------------------
138 "Buffer Selection: Maintaining buffers by buffer menu."
145 "Buffer Selection appearance: Appearance of bs buffer menu."
160 "*List specifying the layout of a Buffer Selection Menu buffer.
161 Each entry specifies a column and is a list of the form of:
162 \(HEADER MINIMUM-LENGTH MAXIMUM-LENGTH ALIGNMENT FUN-OR-STRING)
163 HEADER : string for header for first line or a function
164 which calculates column title.
165 MINIMUM-LENGTH : minimum width of column (number or name of function).
166 The function must return a positive integer.
167 MAXIMUM-LENGTH : maximum width of column (number or name of function)
168 (currently ignored)
169 ALIGNMENT : alignment of column: (`left' `right' `middle')
170 FUN-OR-STRING : Name of a function for calculating the value or
171 a string for a constant value.
172 The function gets as parameter the buffer where we have started
173 buffer selection and the list of all buffers to show. The function must
174 return a string representing the column's value."
182 "Return a regexp matching the first line of a Buffer Selection Menu buffer."
190 ;; Font-Lock-Settings
195 ;; Buffername embedded by *
197 1
198 ;; problem in XEmacs with font-lock-constant-face
200 'font-lock-constant-face
202 ;; Dired-Buffers
204 ;; the star for modified buffers
209 "*Maximal window height of Buffer Selection Menu."
214 "Regular expression specifying which buffers not to show.
215 A buffer whose name matches this regular expression will not be
219 "Regular expression for specifying buffers which must be shown.
220 A buffer whose name matches this regular expression will be
221 included in the buffer list.
222 Note that this variable is temporary: if the configuration is changed
223 it is reset to nil. Use `bs-must-always-show-regexp' to specify buffers
227 "*Regular expression for specifying buffers to show always.
228 A buffer whose name matches this regular expression will
229 be shown regardless of current configuration of Buffer Selection Menu."
234 "Function for specifying buffers not to show.
235 The function gets one argument - the buffer to test. The function must
236 return a value different from nil to ignore the buffer in
240 "Function for specifying buffers which must be shown.
244 "Sort function to sort the buffers that appear in Buffer Selection Menu.
248 "*Maximum column width for buffer names.
249 The column for buffer names has dynamic width. The width depends on
250 maximal and minimal length of names of buffers to show. The maximal
251 width is bounded by `bs-maximal-buffer-name-column'.
252 See also `bs-minimal-buffer-name-column'."
257 "*Minimum column width for buffer names.
258 The column for buffer names has dynamic width. The width depends on
259 maximal and minimal length of names of buffers to show. The minimal
260 width is bounded by `bs-minimal-buffer-name-column'.
261 See also `bs-maximal-buffer-name-column'."
272 bs-sort-buffer-interns-are-last)
274 "*List of all configurations you can use in the Buffer Selection Menu.
275 A configuration describes which buffers appear in Buffer Selection Menu
276 and also the order of buffers. A configuration is a list with
277 six elements. The first element is a string and describes the configuration.
278 The following five elements represent the values for Buffer Selection Menu
279 configuration variables `bs-must-show-regexp', `bs-must-show-function',
280 `bs-dont-show-regexp', `bs-dont-show-function' and `bs-buffer-sort-function'.
281 By setting these variables you define a configuration."
286 "*Name of default configuration used by the Buffer Selection Menu.
289 Must be a string used in `bs-configurations' for naming a configuration."
294 "*Name of configuration used when calling `bs-show' with \
296 Must be a string used in `bs-configurations' for naming a configuration."
301 "Name of current configuration.
305 "*Name of configuration used when cycling through the buffer list.
306 A value of nil means to use current configuration `bs-default-configuration'.
307 Must be a string used in `bs-configurations' for naming a configuration."
310 string))
313 "*String added in column 1 indicating a buffer will always be shown."
318 "*String added in column 1 indicating a buffer will never be shown."
323 "*String added in column 1 indicating the current buffer."
328 "*String added in column 1 indicating the current buffer when it is marked."
333 "*String added in column 1 indicating a marked buffer."
338 "*String added in column 1 indicating a unmarked buffer."
343 "Maximum length of all displayed buffer names.
346 ;; ----------------------------------------------------------------------
347 ;; Internal globals
348 ;; ----------------------------------------------------------------------
351 "Flag for the current mode for showing this buffer.
352 A value of nil means buffer will be shown depending on the current
353 configuration.
354 A value of `never' means to never show the buffer.
359 ;; Make face named region (for XEmacs)
365 "Compare buffers B1 and B2 by buffer name."
370 "Compare buffers B1 and B2 by file name."
375 "Compare buffers B1 and B2 by mode name."
381 "Compare buffers B1 and B2 by buffer size."
392 "*List of all possible sorting aspects for Buffer Selection Menu.
393 You can add a new entry with a call to `bs-define-sort-function'.
394 Each element is a list of four elements (NAME FUNCTION REGEXP-FOR-SORTING FACE)
395 NAME specifies the sort order defined by function FUNCTION.
396 FUNCTION nil means don't sort the buffer list. Otherwise the functions
397 must have two parameters - the buffers to compare.
398 REGEXP-FOR-SORTING is a regular expression which describes the
399 column title to highlight.
400 FACE is a face used to fontify the sorted column title. A value of nil means
401 don't highlight."
406 "Define a new function for buffer sorting in Buffer Selection Menu.
407 NAME specifies the sort order defined by function FUN.
408 A value of nil for FUN means don't sort the buffer list. Otherwise the
409 functions must have two parameters - the buffers to compare.
410 REGEXP-FOR-SORTING is a regular expression which describes the
411 column title to highlight.
412 FACE is a face used to fontify the sorted column title. A value of nil means
413 don't highlight.
414 The new sort aspect will be inserted into list `bs-sort-functions'."
420 bs-sort-functions)))))
423 "Description of the current function for sorting the buffer list.
427 "*Name of default sort behavior.
441 "Flag whether showing all buffers regardless of current configuration.
442 Non nil means to show all buffers. Otherwise show buffers
449 "Regular expression specifying which buffers never to show.
450 A buffer whose name matches this regular expression will never be
454 "List of buffers shown in Buffer Selection Menu.
464 ()
472 (define-key bs-mode-map "F" 'bs-select-other-frame)
474 (let ((key ?1))
475 (while (<= key ?9)
476 (define-key bs-mode-map (char-to-string key) 'digit-argument)
477 (setq key (1+ key))))
479 (define-key bs-mode-map "-" 'negative-argument)
480 (define-key bs-mode-map "\e-" 'negative-argument)
482 (define-key bs-mode-map "o" 'bs-select-other-window)
483 (define-key bs-mode-map "\C-o" 'bs-tmp-select-other-window)
484 ;; for GNU EMACS
485 (define-key bs-mode-map [mouse-3] 'bs-mouse-select-other-frame)
486 ;; for XEmacs
487 (define-key bs-mode-map [button3] 'bs-mouse-select-other-frame)
488 (define-key bs-mode-map [up] 'bs-up)
489 (define-key bs-mode-map "n" 'bs-down)
490 (define-key bs-mode-map "p" 'bs-up)
491 (define-key bs-mode-map [down] 'bs-down)
492 (define-key bs-mode-map "\C-m" 'bs-select)
493 (define-key bs-mode-map "b" 'bs-bury-buffer)
494 (define-key bs-mode-map "s" 'bs-save)
495 (define-key bs-mode-map "S" 'bs-show-sorted)
496 (define-key bs-mode-map "a" 'bs-toggle-show-all)
497 (define-key bs-mode-map "d" 'bs-delete)
498 (define-key bs-mode-map "\C-d" 'bs-delete-backward)
499 (define-key bs-mode-map "k" 'bs-delete)
500 (define-key bs-mode-map "g" 'bs-refresh)
501 (define-key bs-mode-map "C" 'bs-set-configuration-and-refresh)
502 (define-key bs-mode-map "c" 'bs-select-next-configuration)
503 (define-key bs-mode-map "q" 'bs-kill)
504 ;; (define-key bs-mode-map "z" 'bs-kill)
505 (define-key bs-mode-map "\C-c\C-c" 'bs-kill)
506 (define-key bs-mode-map "\C-g" 'bs-abort)
507 (define-key bs-mode-map "\C-]" 'bs-abort)
508 (define-key bs-mode-map "%" 'bs-toggle-readonly)
509 (define-key bs-mode-map "~" 'bs-clear-modified)
510 (define-key bs-mode-map "M" 'bs-toggle-current-to-show)
511 (define-key bs-mode-map "+" 'bs-set-current-buffer-to-show-always)
512 ;;(define-key bs-mode-map "-" 'bs-set-current-buffer-to-show-never)
513 (define-key bs-mode-map "t" 'bs-visit-tags-table)
514 (define-key bs-mode-map "m" 'bs-mark-current)
515 (define-key bs-mode-map "u" 'bs-unmark-current)
516 (define-key bs-mode-map ">" 'scroll-right)
517 (define-key bs-mode-map "<" 'scroll-left)
518 (define-key bs-mode-map "\e\e" nil)
519 (define-key bs-mode-map "\e\e\e" 'bs-kill)
520 (define-key bs-mode-map [escape escape escape] 'bs-kill)
521 (define-key bs-mode-map "?" 'bs-help))
523 ;; ----------------------------------------------------------------------
524 ;; Functions
525 ;; ----------------------------------------------------------------------
527 (defun bs-buffer-list (&optional list sort-description)
528 "Return a list of buffers to be shown.
529 LIST is a list of buffers to test for appearance in Buffer Selection Menu.
530 The result list depends on the global variables `bs-dont-show-regexp',
531 `bs-must-show-regexp', `bs-dont-show-function', `bs-must-show-function'
532 and `bs-buffer-sort-function'.
533 If SORT-DESCRIPTION isn't nil the list will be sorted by
534 a special function. SORT-DESCRIPTION is an element of `bs-sort-functions'."
535 (setq sort-description (or sort-description bs--current-sort-function)
536 list (or list (buffer-list)))
537 (let ((result nil))
538 (while list
539 (let* ((buffername (buffer-name (car list)))
540 (int-show-never (string-match bs--intern-show-never buffername))
541 (ext-show-never (and bs-dont-show-regexp
542 (string-match bs-dont-show-regexp
543 buffername)))
544 (extern-must-show (or (and bs-must-always-show-regexp
545 (string-match
546 bs-must-always-show-regexp
547 buffername))
548 (and bs-must-show-regexp
549 (string-match bs-must-show-regexp
550 buffername))))
551 (extern-show-never-from-fun (and bs-dont-show-function
552 (funcall bs-dont-show-function
553 (car list))))
554 (extern-must-show-from-fun (and bs-must-show-function
555 (funcall bs-must-show-function
556 (car list))))
557 (show-flag (save-excursion
558 (set-buffer (car list))
559 bs-buffer-show-mark)))
560 (if (or (eq show-flag 'always)
561 (and (or bs--show-all (not (eq show-flag 'never)))
562 (not int-show-never)
563 (or bs--show-all
564 extern-must-show
565 extern-must-show-from-fun
566 (and (not ext-show-never)
567 (not extern-show-never-from-fun)))))
568 (setq result (cons (car list)
569 result)))
570 (setq list (cdr list))))
571 (setq result (reverse result))
572 ;; The current buffer which was the start point of bs should be an element
573 ;; of result list, so that we can leave with space and be back in the
574 ;; buffer we started bs-show.
575 (if (and bs--buffer-coming-from
576 (buffer-live-p bs--buffer-coming-from)
577 (not (memq bs--buffer-coming-from result)))
578 (setq result (cons bs--buffer-coming-from result)))
579 ;; sorting
580 (if (and sort-description
581 (nth 1 sort-description))
582 (setq result (sort result (nth 1 sort-description)))
583 ;; else standard sorting
584 (bs-buffer-sort result))))
586 (defun bs-buffer-sort (buffer-list)
587 "Sort buffers in BUFFER-LIST according to `bs-buffer-sort-function'."
588 (if bs-buffer-sort-function
589 (sort buffer-list bs-buffer-sort-function)
590 buffer-list))
592 (defun bs--redisplay (&optional keep-line-p sort-description)
593 "Redisplay whole Buffer Selection Menu.
594 If KEEP-LINE-P is non nil the point will stay on current line.
595 SORT-DESCRIPTION is an element of `bs-sort-functions'"
596 (let ((line (1+ (count-lines 1 (point)))))
597 (bs-show-in-buffer (bs-buffer-list nil sort-description))
598 (if keep-line-p
599 (goto-line line))
600 (beginning-of-line)))
602 (defun bs--goto-current-buffer ()
603 "Goto line which represents the current buffer;
604 actually the line which begins with character in `bs-string-current' or
605 `bs-string-current-marked'."
606 (let ((regexp (concat "^"
607 (regexp-quote bs-string-current)
609 (regexp-quote bs-string-current-marked)))
610 point)
611 (save-excursion
612 (goto-char (point-min))
613 (if (search-forward-regexp regexp nil t)
614 (setq point (- (point) 1))))
615 (if point
616 (goto-char point))))
618 (defun bs--current-config-message ()
619 "Return a string describing the current `bs-mode' configuration."
620 (if bs--show-all
621 "Show all buffers."
622 (format "Show buffer by configuration %S"
623 bs-current-configuration)))
625 (defun bs-mode ()
626 "Major mode for editing a subset of Emacs' buffers.
628 Aside from two header lines each line describes one buffer.
629 Move to a line representing the buffer you want to edit and select
631 There are many key commands similar to `Buffer-menu-mode' for
632 manipulating the buffer list and buffers.
633 For faster navigation each digit key is a digit argument.
639 remain in Buffer Selection Menu.
649 apply selected configuration.
651 available Buffer Selection Menu configuration.
655 to show always.
658 (interactive)
659 (kill-all-local-variables)
660 (use-local-map bs-mode-map)
661 (make-local-variable 'font-lock-defaults)
662 (make-local-variable 'font-lock-verbose)
663 (setq major-mode 'bs-mode
664 mode-name "Buffer-Selection-Menu"
665 buffer-read-only t
666 truncate-lines t
667 font-lock-defaults '(bs-mode-font-lock-keywords t)
668 font-lock-verbose nil)
669 (run-hooks 'bs-mode-hook))
671 (defun bs-kill ()
672 "Let buffer disappear and reset window-configuration."
673 (interactive)
674 (bury-buffer (current-buffer))
675 (set-window-configuration bs--window-config-coming-from))
677 (defun bs-abort ()
678 "Ding and leave Buffer Selection Menu without a selection."
679 (interactive)
680 (ding)
681 (bs-kill))
683 (defun bs-set-configuration-and-refresh ()
684 "Ask user for a configuration and apply selected configuration.
685 Refresh whole Buffer Selection Menu."
686 (interactive)
687 (call-interactively 'bs-set-configuration)
688 (bs--redisplay t))
690 (defun bs-refresh ()
691 "Refresh whole Buffer Selection Menu."
692 (interactive)
693 (bs--redisplay t))
695 (defun bs--window-for-buffer (buffer-name)
696 "Return a window showing a buffer with name BUFFER-NAME.
697 Take only windows of current frame into account.
698 Return nil if there is no such buffer."
699 (let ((window nil))
700 (walk-windows (lambda (wind)
701 (if (string= (buffer-name (window-buffer wind))
702 buffer-name)
703 (setq window wind))))
704 window))
706 (defun bs--set-window-height ()
707 "Change the height of the selected window to suit the current buffer list."
708 (unless (one-window-p t)
709 (shrink-window (- (window-height (selected-window))
710 ;; window-height in xemacs includes mode-line
711 (+ (if bs--running-in-xemacs 3 1)
712 bs-header-lines-length
713 (min (length bs-current-list)
714 bs-max-window-height))))))
716 (defun bs--current-buffer ()
717 "Return buffer on current line.
718 Raise an error if not on a buffer line."
719 (beginning-of-line)
720 (let ((line (+ (- bs-header-lines-length)
721 (count-lines 1 (point)))))
722 (if (< line 0)
723 (error "You are on a header row"))
724 (nth line bs-current-list)))
726 (defun bs--update-current-line ()
727 "Update the entry on current line for Buffer Selection Menu."
728 (let ((buffer (bs--current-buffer))
729 (inhibit-read-only t))
730 (beginning-of-line)
731 (delete-region (point) (line-end-position))
732 (bs--insert-one-entry buffer)
733 (beginning-of-line)))
735 (defun bs-view ()
736 "View current line's buffer in View mode.
737 Leave Buffer Selection Menu."
738 (interactive)
739 (view-buffer (bs--current-buffer)))
741 (defun bs-select ()
742 "Select current line's buffer and other marked buffers.
743 If there are no marked buffers the window configuration before starting
744 Buffer Selectin Menu will be restored.
745 If there are marked buffers each marked buffer and the current line's buffer
746 will be selected in a window.
747 Leave Buffer Selection Menu."
748 (interactive)
749 (let ((buffer (bs--current-buffer)))
750 (bury-buffer (current-buffer))
751 (set-window-configuration bs--window-config-coming-from)
752 (switch-to-buffer buffer)
753 (if bs--marked-buffers
754 ;; Some marked buffers for selection
755 (let* ((all (delq buffer bs--marked-buffers))
756 (height (/ (1- (frame-height)) (1+ (length all)))))
757 (delete-other-windows)
758 (switch-to-buffer buffer)
759 (while all
760 (split-window nil height)
761 (other-window 1)
762 (switch-to-buffer (car all))
763 (setq all (cdr all)))
764 ;; goto window we have started bs.
765 (other-window 1)))))
767 (defun bs-select-other-window ()
768 "Select current line's buffer by `switch-to-buffer-other-window'.
769 The window configuration before starting Buffer Selectin Menu will be restored
770 unless there is no other window. In this case a new window will be created.
771 Leave Buffer Selection Menu."
772 (interactive)
773 (let ((buffer (bs--current-buffer)))
774 (bury-buffer (current-buffer))
775 (set-window-configuration bs--window-config-coming-from)
776 (switch-to-buffer-other-window buffer)))
778 (defun bs-tmp-select-other-window ()
779 "Make the other window select this line's buffer.
780 The current window remains selected."
781 (interactive)
782 (let ((buffer (bs--current-buffer)))
783 (display-buffer buffer t)))
785 (defun bs-select-other-frame ()
786 "Select current line's buffer in new created frame.
787 Leave Buffer Selection Menu."
788 (interactive)
789 (let ((buffer (bs--current-buffer)))
790 (bury-buffer (current-buffer))
791 (set-window-configuration bs--window-config-coming-from)
792 (switch-to-buffer-other-frame buffer)))
794 (defun bs-mouse-select-other-frame (event)
795 "Select selected line's buffer in new created frame.
796 Leave Buffer Selection Menu.
797 EVENT: a mouse click EVENT."
798 (interactive "e")
799 (mouse-set-point event)
800 (bs-select-other-frame))
802 (defun bs-mouse-select (event)
803 "Select buffer on mouse click EVENT.
804 Select buffer by `bs-select'."
805 (interactive "e")
806 (mouse-set-point event)
807 (bs-select))
809 (defun bs-select-in-one-window ()
810 "Select current line's buffer in one window and delete other windows.
811 Leave Buffer Selection Menu."
812 (interactive)
813 (bs-select)
814 (delete-other-windows))
816 (defun bs-bury-buffer ()
817 "Bury buffer on current line."
818 (interactive)
819 (bury-buffer (bs--current-buffer))
820 (bs--redisplay t))
822 (defun bs-save ()
823 "Save buffer on current line."
824 (interactive)
825 (let ((buffer (bs--current-buffer)))
826 (save-excursion
827 (set-buffer buffer)
828 (save-buffer))
829 (bs--update-current-line)))
831 (defun bs-visit-tags-table ()
832 "Visit the tags table in the buffer on this line.
833 See `visit-tags-table'."
834 (interactive)
835 (let ((file (buffer-file-name (bs--current-buffer))))
836 (if file
837 (visit-tags-table file)
838 (error "Specified buffer has no file"))))
840 (defun bs-toggle-current-to-show ()
841 "Toggle status of showing flag for buffer in current line."
842 (interactive)
843 (let ((buffer (bs--current-buffer))
844 res)
845 (save-excursion
846 (set-buffer buffer)
847 (setq res (cond ((null bs-buffer-show-mark)
848 'never)
849 ((eq bs-buffer-show-mark 'never)
850 'always)
851 (t nil)))
852 (setq bs-buffer-show-mark res))
853 (bs--update-current-line)
854 (bs--set-window-height)
855 (bs--show-config-message res)))
857 (defun bs-set-current-buffer-to-show-always (&optional not-to-show-p)
858 "Toggle status of buffer on line to `always shown'.
859 NOT-TO-SHOW-P: prefix argument.
860 With no prefix argument the buffer on current line is marked to show
861 always. Otherwise it is marked to show never."
862 (interactive "P")
863 (if not-to-show-p
864 (bs-set-current-buffer-to-show-never)
865 (bs--set-toggle-to-show (bs--current-buffer) 'always)))
867 (defun bs-set-current-buffer-to-show-never ()
868 "Toggle status of buffer on line to `never shown'."
869 (interactive)
870 (bs--set-toggle-to-show (bs--current-buffer) 'never))
872 (defun bs--set-toggle-to-show (buffer what)
873 "Set value `bs-buffer-show-mark' of buffer BUFFER to WHAT.
874 Redisplay current line and display a message describing
875 the status of buffer on current line."
876 (save-excursion
877 (set-buffer buffer)
878 (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 buffer name."
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 (interactive "p")
1021 (previous-line 1)
1022 (if (<= (count-lines 1 (point)) (1- bs-header-lines-length))
1023 (progn
1024 (goto-char (point-max))
1025 (beginning-of-line)
1026 (recenter -1))
1027 (beginning-of-line)))
1029 (defun bs-down (arg)
1030 "Move cursor vertically down ARG lines in Buffer Selection Menu."
1031 (interactive "p")
1032 (if (and arg (numberp arg) (< arg 0))
1033 (bs--nth-wrapper (- arg) 'bs--up)
1034 (bs--nth-wrapper arg 'bs--down)))
1036 (defun bs--down ()
1037 "Move cursor vertically down one line.
1038 If at end of buffer list go to first line."
1039 (let ((last (line-end-position)))
1040 (if (eq last (point-max))
1041 (goto-line (1+ bs-header-lines-length))
1042 (next-line 1))))
1044 (defun bs-visits-non-file (buffer)
1045 "Return t or nil whether BUFFER visits no file.
1046 A value of t means BUFFER belongs to no file.
1047 A value of nil means BUFFER belongs to a file."
1048 (not (buffer-file-name buffer)))
1050 (defun bs-sort-buffer-interns-are-last (b1 b2)
1051 "Function for sorting internal buffers B1 and B2 at the end of all buffers."
1054 ;; ----------------------------------------------------------------------
1055 ;; Configurations:
1056 ;; ----------------------------------------------------------------------
1058 (defun bs-config-clear ()
1059 "*Reset all variables which specify a configuration.
1060 These variables are `bs-dont-show-regexp', `bs-must-show-regexp',
1061 `bs-dont-show-function', `bs-must-show-function' and
1062 `bs-buffer-sort-function'."
1063 (setq bs-dont-show-regexp nil
1064 bs-must-show-regexp nil
1065 bs-dont-show-function nil
1066 bs-must-show-function nil
1067 bs-buffer-sort-function nil))
1069 (defun bs-config--only-files ()
1070 "Define a configuration for showing only buffers visiting a file."
1071 (bs-config-clear)
1072 (setq ;; I want to see *-buffers at the end
1073 bs-buffer-sort-function 'bs-sort-buffer-interns-are-last
1074 ;; Don't show files who don't belong to a file
1075 bs-dont-show-function 'bs-visits-non-file))
1077 (defun bs-config--files-and-scratch ()
1078 "Define a configuration for showing buffer *scratch* and file buffers."
1079 (bs-config-clear)
1080 (setq ;; I want to see *-buffers at the end
1081 bs-buffer-sort-function 'bs-sort-buffer-interns-are-last
1082 ;; Don't show files who don't belong to a file
1083 bs-dont-show-function 'bs-visits-non-file
1084 ;; Show *scratch* buffer.
1087 (defun bs-config--all ()
1088 "Define a configuration for showing all buffers.
1089 Reset all according variables by `bs-config-clear'."
1090 (bs-config-clear))
1092 (defun bs-config--all-intern-last ()
1093 "Define a configuration for showing all buffers.
1094 Internal buffers appear at end of all buffers."
1095 (bs-config-clear)
1096 ;; I want to see *-buffers at the end
1097 (setq bs-buffer-sort-function 'bs-sort-buffer-interns-are-last))
1099 (defun bs-set-configuration (name)
1100 "Set configuration to the one saved under string NAME in `bs-configurations'.
1101 When called interactively ask user for a configuration and apply selected
1102 configuration."
1103 (interactive (list (completing-read "Use configuration: "
1104 bs-configurations
1105 nil
1106 t)))
1107 (let ((list (assoc name bs-configurations)))
1108 (if list
1109 (if (listp list)
1110 (setq bs-current-configuration name
1111 bs-must-show-regexp (nth 1 list)
1112 bs-must-show-function (nth 2 list)
1113 bs-dont-show-regexp (nth 3 list)
1114 bs-dont-show-function (nth 4 list)
1115 bs-buffer-sort-function (nth 5 list))
1116 ;; for backward compability
1117 (funcall (cdr list)))
1118 ;; else
1119 (ding)
1120 (bs-message-without-log "No bs-configuration named %S." name))))
1122 (defun bs-help ()
1123 "Help for `bs-show'."
1124 (interactive)
1125 (describe-function 'bs-mode))
1127 (defun bs-next-config-aux (start-name list)
1128 "Get the next assoc after START-NAME in list LIST.
1129 Will return the first if START-NAME is at end."
1130 (let ((assocs list)
1131 (length (length list))
1132 pos)
1133 (while (and assocs (not pos))
1134 (if (string= (car (car assocs)) start-name)
1135 (setq pos (- length (length assocs))))
1136 (setq assocs (cdr assocs)))
1137 (setq pos (1+ pos))
1138 (if (eq pos length)
1139 (car list)
1140 (nth pos list))))
1142 (defun bs-next-config (name)
1143 "Return next configuration with respect to configuration with name NAME."
1144 (bs-next-config-aux name bs-configurations))
1146 (defun bs-select-next-configuration (&optional start-name)
1147 "Apply next configuration START-NAME and refresh buffer list.
1148 If START-NAME is nil the current configuration `bs-current-configuration'
1149 will be used."
1150 (interactive)
1151 (let ((config (bs-next-config (or start-name bs-current-configuration))))
1152 (bs-set-configuration (car config))
1153 (setq bs-default-configuration bs-current-configuration)
1154 (bs--redisplay t)
1155 (bs--set-window-height)
1156 (bs-message-without-log "Selected configuration: %s" (car config))))
1158 (defun bs-show-in-buffer (list)
1159 "Display buffer list LIST in buffer *buffer-selection*.
1160 Select buffer *buffer-selection* and display buffers according to current
1161 configuration `bs-current-configuration'. Set window height, fontify buffer
1162 and move point to current buffer."
1163 (setq bs-current-list list)
1164 (switch-to-buffer (get-buffer-create "*buffer-selection*"))
1165 (bs-mode)
1166 (let* ((inhibit-read-only t)
1167 (map-fun (lambda (entry)
1168 (length (buffer-name entry))))
1169 (max-length-of-names (apply 'max
1170 (cons 0 (mapcar map-fun list))))
1171 (name-entry-length (min bs-maximal-buffer-name-column
1172 (max bs-minimal-buffer-name-column
1173 max-length-of-names))))
1174 (erase-buffer)
1175 (setq bs--name-entry-length name-entry-length)
1176 (bs--show-header)
1177 (while list
1178 (bs--insert-one-entry (car list))
1180 (setq list (cdr list)))
1181 (delete-backward-char 1)
1182 (bs--set-window-height)
1183 (bs--goto-current-buffer)
1184 (font-lock-fontify-buffer)
1185 (bs-apply-sort-faces)))
1187 (defun bs-next-buffer (&optional buffer-list sorting-p)
1188 "Return next buffer and buffer list for buffer cycling in BUFFER-LIST.
1189 Ignore sorting when SORTING-P is nil.
1190 If BUFFER-LIST is nil the result of `bs-buffer-list' will be used as
1191 buffer list. The result is a cons of normally the second element of
1192 BUFFER-LIST and the buffer list used for buffer cycling."
1193 (let* ((bs--current-sort-function (if sorting-p
1194 bs--current-sort-function))
1195 (bs-buffer-list (or buffer-list (bs-buffer-list))))
1196 (cons (or (car (cdr bs-buffer-list))
1197 (car bs-buffer-list)
1198 (current-buffer))
1199 bs-buffer-list)))
1201 (defun bs-previous-buffer (&optional buffer-list sorting-p)
1202 "Return previous buffer and buffer list for buffer cycling in BUFFER-LIST.
1203 Ignore sorting when SORTING-P is nil.
1204 If BUFFER-LIST is nil the result of `bs-buffer-list' will be used as
1205 buffer list. The result is a cons of last element of BUFFER-LIST and the
1206 buffer list used for buffer cycling."
1207 (let* ((bs--current-sort-function (if sorting-p
1208 bs--current-sort-function))
1209 (bs-buffer-list (or buffer-list (bs-buffer-list))))
1210 (cons (or (car (last bs-buffer-list))
1211 (current-buffer))
1212 bs-buffer-list)))
1214 (defun bs-message-without-log (&rest args)
1215 "Like `message' but don't log it on the message log.
1216 All arguments ARGS are transferred to function `message'."
1217 (let ((message-log-max nil))
1218 (apply 'message args)))
1220 (defvar bs--cycle-list nil
1221 "Current buffer list used for cycling.")
1223 ;;;###autoload
1224 (defun bs-cycle-next ()
1225 "Select next buffer defined by buffer cycling.
1226 The buffers taking part in buffer cycling are defined
1227 by buffer configuration `bs-cycle-configuration-name'."
1228 (interactive)
1229 (let ((bs--buffer-coming-from (current-buffer))
1230 (bs-dont-show-regexp bs-dont-show-regexp)
1231 (bs-must-show-regexp bs-must-show-regexp)
1232 (bs-dont-show-function bs-dont-show-function)
1233 (bs-must-show-function bs-must-show-function)
1234 (bs--show-all nil))
1235 (bs-set-configuration (or bs-cycle-configuration-name bs-default-configuration))
1236 (let ((bs-buffer-sort-function nil)
1237 (bs--current-sort-function nil))
1238 (let* ((tupel (bs-next-buffer (if (or (eq last-command
1239 'bs-cycle-next)
1240 (eq last-command
1241 'bs-cycle-previous))
1242 bs--cycle-list)))
1243 (next (car tupel))
1244 (cycle-list (cdr tupel)))
1245 (setq bs--cycle-list (append (cdr cycle-list)
1246 (list (car cycle-list))))
1247 (bury-buffer)
1248 (switch-to-buffer next)
1249 (bs-message-without-log "Next buffers: %s"
1250 (or (cdr bs--cycle-list)
1251 "this buffer"))))))
1254 ;;;###autoload
1255 (defun bs-cycle-previous ()
1256 "Select previous buffer defined by buffer cycling.
1257 The buffers taking part in buffer cycling are defined
1258 by buffer configuration `bs-cycle-configuration-name'."
1259 (interactive)
1260 (let ((bs--buffer-coming-from (current-buffer))
1261 (bs-dont-show-regexp bs-dont-show-regexp)
1262 (bs-must-show-regexp bs-must-show-regexp)
1263 (bs-dont-show-function bs-dont-show-function)
1264 (bs-must-show-function bs-must-show-function)
1265 (bs--show-all nil))
1266 (bs-set-configuration (or bs-cycle-configuration-name bs-default-configuration))
1267 (let ((bs-buffer-sort-function nil)
1268 (bs--current-sort-function nil))
1269 (let* ((tupel (bs-previous-buffer (if (or (eq last-command
1270 'bs-cycle-next)
1271 (eq last-command
1272 'bs-cycle-previous))
1273 bs--cycle-list)))
1274 (prev-buffer (car tupel))
1275 (cycle-list (cdr tupel)))
1276 (setq bs--cycle-list (append (last cycle-list)
1277 (reverse (cdr (reverse cycle-list)))))
1278 (switch-to-buffer prev-buffer)
1279 (bs-message-without-log "Previous buffers: %s"
1280 (or (reverse (cdr bs--cycle-list))
1281 "this buffer"))))))
1283 (defun bs--get-value (fun &optional args)
1284 "Apply function FUN with arguments ARGS.
1285 Return result of evaluation. Will return FUN if FUN is a number
1286 or a string."
1287 (cond ((numberp fun)
1288 fun)
1289 ((stringp fun)
1290 fun)
1291 (t (apply fun args))))
1293 (defun bs--get-marked-string (start-buffer all-buffers)
1294 "Return a string which describes whether current buffer is marked.
1295 START-BUFFER is the buffer where we started buffer selection.
1296 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu.
1297 The result string is one of `bs-string-current', `bs-string-current-marked',
1298 `bs-string-marked', `bs-string-show-normally', `bs-string-show-never', or
1299 `bs-string-show-always'."
1300 (cond ;; current buffer is the buffer we started buffer selection.
1301 ((eq (current-buffer) start-buffer)
1302 (if (memq (current-buffer) bs--marked-buffers)
1303 bs-string-current-marked ; buffer is marked
1304 bs-string-current))
1305 ;; current buffer is marked
1306 ((memq (current-buffer) bs--marked-buffers)
1307 bs-string-marked)
1308 ;; current buffer hasn't a special mark.
1309 ((null bs-buffer-show-mark)
1310 bs-string-show-normally)
1311 ;; current buffer has a mark not to show itself.
1312 ((eq bs-buffer-show-mark 'never)
1313 bs-string-show-never)
1314 ;; otherwise current buffer is marked to show always.
1315 (t
1316 bs-string-show-always)))
1318 (defun bs--get-modified-string (start-buffer all-buffers)
1319 "Return a string which describes whether current buffer is modified.
1320 START-BUFFER is the buffer where we started buffer selection.
1321 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu."
1322 (if (buffer-modified-p) "*" " "))
1324 (defun bs--get-readonly-string (start-buffer all-buffers)
1325 "Return a string which describes whether current buffer is read only.
1326 START-BUFFER is the buffer where we started buffer selection.
1327 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu."
1328 (if buffer-read-only "%" " "))
1330 (defun bs--get-size-string (start-buffer all-buffers)
1331 "Return a string which describes the size of current buffer.
1332 START-BUFFER is the buffer where we started buffer selection.
1333 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu."
1334 (int-to-string (buffer-size)))
1336 (defun bs--get-name (start-buffer all-buffers)
1337 "Return name of current buffer for Buffer Selection Menu.
1338 The name of current buffer gets additional text properties
1339 for mouse highlighting.
1340 START-BUFFER is the buffer where we started buffer selection.
1341 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu."
1342 (let ((name (copy-sequence (buffer-name))))
1343 (add-text-properties
1344 0 (length name)
1345 '(mouse-face highlight
1346 help-echo
1347 "mouse-2: select this buffer, mouse-3: select in other frame")
1348 name)
1349 (if (< (length name) bs--name-entry-length)
1350 (concat name
1351 (make-string (- bs--name-entry-length (length name)) ? ))
1352 name)))
1354 (defun bs--get-mode-name (start-buffer all-buffers)
1355 "Return the name of mode of current buffer for Buffer Selection Menu.
1356 START-BUFFER is the buffer where we started buffer selection.
1357 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu."
1358 mode-name)
1360 (defun bs--get-file-name (start-buffer all-buffers)
1361 "Return string for column 'File' in Buffer Selection Menu.
1362 This is the variable `buffer-file-name' of current buffer.
1363 If current mode is `dired-mode' or `shell-mode' it returns the
1364 default directory.
1365 START-BUFFER is the buffer where we started buffer selection.
1366 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu."
1367 (let ((string (copy-sequence (if (member major-mode
1368 '(shell-mode dired-mode))
1369 default-directory
1370 (or buffer-file-name "")))))
1371 (add-text-properties
1372 0 (length string)
1373 '(mouse-face highlight
1374 help-echo "mouse-2: select this buffer, mouse-3: select in other frame")
1375 string)
1376 string))
1378 (defun bs--insert-one-entry (buffer)
1379 "Generate one entry for buffer BUFFER in Buffer Selection Menu.
1380 It goes over all columns described in `bs-attributes-list'
1381 and evaluates corresponding string. Inserts string in current buffer;
1382 normally *buffer-selection*."
1383 (let ((string "")
1384 (columns bs-attributes-list)
1385 (to-much 0)
1386 (apply-args (append (list bs--buffer-coming-from bs-current-list))))
1387 (save-excursion
1388 (while columns
1389 (set-buffer buffer)
1390 (let ((min (bs--get-value (nth 1 (car columns))))
1391 ;;(max (bs--get-value (nth 2 (car columns)))) refered no more
1392 (align (nth 3 (car columns)))
1393 (fun (nth 4 (car columns)))
1394 (val nil)
1395 new-string)
1396 (setq val (bs--get-value fun apply-args))
1397 (setq new-string (bs--format-aux val align (- min to-much)))
1398 (setq string (concat string new-string))
1399 (if (> (length new-string) min)
1400 (setq to-much (- (length new-string) min)))
1401 ) ; let
1402 (setq columns (cdr columns))))
1403 (insert string)
1404 string))
1406 (defun bs--format-aux (string align len)
1407 "Generate a string with STRING with alignment ALIGN and length LEN.
1408 ALIGN is one of the symbols `left', `middle', or `right'."
1409 (let ((length (length string)))
1410 (if (>= length len)
1411 string
1412 (if (eq 'right align)
1413 (concat (make-string (- len length) ? ) string)
1414 (concat string (make-string (- len length) ? ))))))
1416 (defun bs--show-header ()
1417 "Insert header for Buffer Selection Menu in current buffer."
1418 (mapcar '(lambda (string)
1420 (bs--create-header)))
1422 (defun bs--get-name-length ()
1423 "Return value of `bs--name-entry-length'."
1424 bs--name-entry-length)
1426 (defun bs--create-header ()
1427 "Return all header lines used in Buffer Selection Menu as a list of strings."
1428 (list (mapconcat (lambda (column)
1429 (bs--format-aux (bs--get-value (car column))
1430 (nth 3 column) ; align
1431 (bs--get-value (nth 1 column))))
1432 bs-attributes-list
1433 "")
1434 (mapconcat (lambda (column)
1435 (let ((length (length (bs--get-value (car column)))))
1436 (bs--format-aux (make-string length ?-)
1437 (nth 3 column) ; align
1438 (bs--get-value (nth 1 column)))))
1439 bs-attributes-list
1440 "")))
1442 (defun bs--show-with-configuration (name &optional arg)
1443 "Display buffer list of configuration with name NAME.
1444 Set configuration NAME and determine window for Buffer Selection Menu.
1445 Unless current buffer is buffer *buffer-selection* we have to save
1446 the buffer we started Buffer Selection Menu and the current window
1447 configuration to restore buffer and window configuration after a
1448 selection. If there is already a window displaying *buffer-selection*
1449 select this window for Buffer Selection Menu. Otherwise open a new
1450 window.
1451 The optional argument ARG is the prefix argument when calling a function
1452 for buffer selection."
1453 (bs-set-configuration name)
1454 (let ((bs--show-all (or bs--show-all arg)))
1455 (unless (string= "*buffer-selection*" (buffer-name))
1456 ;; Only when not in buffer *buffer-selection*
1457 ;; we have to set the buffer we started the command
1458 (progn
1459 (setq bs--buffer-coming-from (current-buffer))
1460 (setq bs--window-config-coming-from (current-window-configuration))))
1461 (let ((liste (bs-buffer-list))
1462 (active-window (bs--window-for-buffer "*buffer-selection*")))
1463 (if active-window
1464 (select-window active-window)
1465 (if (> (window-height (selected-window)) 7)
1466 (progn
1467 (split-window-vertically)
1468 (other-window 1))))
1469 (bs-show-in-buffer liste)
1470 (bs-message-without-log "%s" (bs--current-config-message)))))
1472 (defun bs--configuration-name-for-prefix-arg (prefix-arg)
1473 "Convert prefix argument PREFIX-ARG to a name of a buffer configuration.
1474 If PREFIX-ARG is nil return `bs-default-configuration'.
1475 If PREFIX-ARG is an integer return PREFIX-ARG element of `bs-configurations'.
1476 Otherwise return `bs-alternative-configuration'."
1477 (cond ;; usually activation
1478 ((null prefix-arg)
1479 bs-default-configuration)
1480 ;; call with integer as prefix argument
1481 ((integerp prefix-arg)
1482 (if (and (< 0 prefix-arg) (<= prefix-arg (length bs-configurations)))
1483 (car (nth (1- prefix-arg) bs-configurations))
1484 bs-default-configuration))
1485 ;; call by prefix argument C-u
1486 (t bs-alternative-configuration)))
1488 ;; ----------------------------------------------------------------------
1489 ;; Main function bs-customize and bs-show
1490 ;; ----------------------------------------------------------------------
1492 ;;;###autoload
1493 (defun bs-customize ()
1494 "Customization of group bs for Buffer Selection Menu."
1495 (interactive)
1496 (customize-group "bs"))
1498 ;;;###autoload
1499 (defun bs-show (arg)
1500 "Make a menu of buffers so you can manipulate buffers or the buffer list.
1502 There are many key commands similar to `Buffer-menu-mode' for
1503 manipulating buffer list and buffers itself.
1504 User can move with [up] or [down], select a buffer
1508 With prefix argument ARG show a different buffer list. Function
1509 `bs--configuration-name-for-prefix-arg' determine accordingly
1510 name of buffer configuration."
1511 (interactive "P")
1512 (setq bs--marked-buffers nil)
1513 (bs--show-with-configuration (bs--configuration-name-for-prefix-arg arg)))
1515 ;; Now provide feature bs
1516 (provide 'bs)
1518 ;;; bs.el ends here