| blob | 5951d129d9695c65d321bb7ec520f7c8d418fb22 |
1 ;;; bs.el --- menu for selecting and displaying buffers
3 ;; Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004,
4 ;; 2005, 2006, 2007 Free Software Foundation, Inc.
5 ;; Author: Olaf Sylvester <Olaf.Sylvester@netsurf.de>
6 ;; Maintainer: Olaf Sylvester <Olaf.Sylvester@netsurf.de>
7 ;; Keywords: convenience
9 ;; This file is part of GNU Emacs.
11 ;; GNU Emacs is free software; you can redistribute it and/or modify
12 ;; it under the terms of the GNU General Public License as published by
13 ;; the Free Software Foundation; either version 2, or (at your option)
14 ;; any later version.
16 ;; GNU Emacs is distributed in the hope that it will be useful,
17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 ;; GNU General Public License for more details.
21 ;; You should have received a copy of the GNU General Public License
22 ;; along with GNU Emacs; see the file COPYING. If not, write to the
23 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
24 ;; Boston, MA 02110-1301, USA.
26 ;;; Commentary:
28 ;; Version: 1.17
29 ;; X-URL: http://www.geekware.de/software/emacs
30 ;;
31 ;; The bs-package contains a main function bs-show for poping up a
32 ;; buffer in a way similar to `list-buffers' and `electric-buffer-list':
33 ;; The new buffer offers a Buffer Selection Menu for manipulating
34 ;; the buffer list and buffers.
35 ;;
36 ;; -----------------------------------------------------------------------
37 ;; | MR Buffer Size Mode File |
38 ;; | -- ------ ---- ---- ---- |
39 ;; |. bs.el 14690 Emacs-Lisp /home/sun/sylvester/el/bs.e$|
40 ;; | % executable.el 9429 Emacs-Lisp /usr/share/emacs/19.34/lisp$|
41 ;; | % vc.el 104893 Emacs-Lisp /usr/share/emacs/19.34/lisp$|
42 ;; | % test_vc.el 486 Emacs-Lisp /home/sun/sylvester/el/test$|
43 ;; | % vc-hooks.el 43605 Emacs-Lisp /usr/share/emacs/19.34/lisp$|
44 ;; -----------------------------------------------------------------------
46 ;;; Quick Installation und Customization:
48 ;; Use
49 ;; M-x bs-show
50 ;; for buffer selection or optional bind a key to main function `bs-show'
51 ;; (global-set-key "\C-x\C-b" 'bs-show) ;; or another key
52 ;;
53 ;; For customization use
54 ;; M-x bs-customize
57 ;;; More Commentary:
59 ;; bs-show will generate a new buffer named *buffer-selection*, which shows
60 ;; all buffers or a subset of them, and has possibilities for deleting,
61 ;; saving and selecting buffers. For more details see docstring of
62 ;; function `bs-mode'. A current configuration describes which buffers appear
63 ;; in *buffer-selection*. See docstring of variable `bs-configurations' for
64 ;; more details.
65 ;;
66 ;; The package bs combines the advantages of the Emacs functions
67 ;; `list-buffers' and `electric-buffer-list'.
68 ;;
69 ;; Additional features for Buffer Selection Menu:
70 ;; - configurable list of buffers (show only files etc.).
71 ;; - comfortable way to change displayed subset of all buffers.
72 ;; - show sorted list of buffers.
73 ;; - cyclic navigation:
74 ;; - goes to top of buffer list if you are on last line and press down.
75 ;; - goes to end of buffer list if you are on first line and press up.
76 ;; - Offer an alternative buffer list by prefix key C-u.
78 ;;; Cycling through buffers
80 ;; This package offers two functions for buffer cycling. If you want to cycle
81 ;; through buffer list you can use `bs-cycle-next' or `bs-cycle-previous'.
82 ;; Bind these function to a key like
83 ;; (global-set-key [(f9)] 'bs-cycle-previous)
84 ;; (global-set-key [(f10)] 'bs-cycle-next)
85 ;;
86 ;; Both functions use a special subset of all buffers for cycling to avoid
87 ;; to go through internal buffers like *Messages*.
88 ;;
89 ;; Cycling through buffers ignores sorting because sorting destroys
90 ;; the logical buffer list. If buffer list is sorted by size you
91 ;; won't be able to cycle to the smallest buffer.
93 ;;; Customization:
95 ;; There is a customization group called `bs' in group `convenience'.
96 ;; Start customization by M-x bs-customize
97 ;;
98 ;; Buffer list
99 ;; -----------
100 ;; You can define your own configurations by extending variable
101 ;; `bs-configurations' (see docstring for details).
102 ;;
103 ;; `bs-default-configuration' contains the name of default configuration.
104 ;; The default value is "files" which means to show only files.
105 ;;
106 ;; If you always want to see all buffers, customize variable
107 ;; `bs-default-configuration' in customization group `bs'.
108 ;;
109 ;; Configure sorting
110 ;; -----------------
111 ;; You can define functions for sorting the buffer list.
112 ;; When selecting buffers, you can step through available sorting
113 ;; methods with key 'S'.
114 ;; To define a new way of sorting, customize variable `bs-sort-functions'.
115 ;;
116 ;; There are four basic functions for sorting:
117 ;; by buffer name, by mode, by size, or by filename
118 ;;
119 ;; Configure buffer cycling
120 ;; ------------------------
121 ;; When cycling through buffer list the functions for cycling will use
122 ;; the current configuration of bs to calculate the buffer list.
123 ;; If you want to use a different configuration for cycling you have to set
124 ;; the variable `bs-cycle-configuration-name'. You can customize this variable.
125 ;;
126 ;; For example: If you use the configuration called "files-and-scratch" you
127 ;; can cycle through all file buffers and *scratch* although your current
128 ;; configuration perhaps is "files" which ignores buffer *scratch*.
130 ;;; History:
132 ;;; Code:
136 ;; ----------------------------------------------------------------------
137 ;; Globals for customization
138 ;; ----------------------------------------------------------------------
141 "Buffer Selection: Maintaining buffers by buffer menu."
148 "Buffer Selection appearance: Appearance of bs buffer menu."
163 "*List specifying the layout of a Buffer Selection Menu buffer.
164 Each entry specifies a column and is a list of the form of:
165 \(HEADER MINIMUM-LENGTH MAXIMUM-LENGTH ALIGNMENT FUN-OR-STRING)
167 HEADER : String for header for first line or a function
168 which calculates column title.
169 MINIMUM-LENGTH : Minimum width of column (number or name of function).
170 The function must return a positive integer.
171 MAXIMUM-LENGTH : Maximum width of column (number or name of function)
172 (currently ignored).
173 ALIGNMENT : Alignment of column (`left', `right', `middle').
174 FUN-OR-STRING : Name of a function for calculating the value or a
175 string for a constant value.
177 The function gets as parameter the buffer where we have started
178 buffer selection and the list of all buffers to show. The function must
179 return a string representing the column's value."
184 "Return a regexp matching the first line of a Buffer Selection Menu buffer."
192 ;; Font-Lock-Settings
197 ;; Buffername embedded by *
199 1
200 ;; problem in XEmacs with font-lock-constant-face
202 'font-lock-constant-face
204 ;; Dired-Buffers
206 ;; the star for modified buffers
211 "*Maximal window height of Buffer Selection Menu."
216 "Regular expression specifying which buffers not to show.
217 A buffer whose name matches this regular expression will not be
221 "Regular expression for specifying buffers which must be shown.
222 A buffer whose name matches this regular expression will be
223 included in the buffer list.
224 Note that this variable is temporary: if the configuration is changed
225 it is reset to nil. Use `bs-must-always-show-regexp' to specify buffers
229 "*Regular expression for specifying buffers to show always.
230 A buffer whose name matches this regular expression will
231 be shown regardless of current configuration of Buffer Selection Menu."
236 "Function for specifying buffers not to show.
237 The function gets one argument - the buffer to test. The function must
238 return a value different from nil to ignore the buffer in
242 "Function for specifying buffers which must be shown.
246 "Sort function to sort the buffers that appear in Buffer Selection Menu.
250 "*Maximum column width for buffer names.
251 The column for buffer names has dynamic width. The width depends on
252 maximal and minimal length of names of buffers to show. The maximal
253 width is bounded by `bs-maximal-buffer-name-column'.
254 See also `bs-minimal-buffer-name-column'."
259 "*Minimum column width for buffer names.
260 The column for buffer names has dynamic width. The width depends on
261 maximal and minimal length of names of buffers to show. The minimal
262 width is bounded by `bs-minimal-buffer-name-column'.
263 See also `bs-maximal-buffer-name-column'."
274 bs-sort-buffer-interns-are-last)
276 "*List of all configurations you can use in the Buffer Selection Menu.
277 A configuration describes which buffers appear in Buffer Selection Menu
278 and also the order of buffers. A configuration is a list with
279 six elements. The first element is a string and describes the configuration.
280 The following five elements represent the values for Buffer Selection Menu
281 configuration variables `bs-must-show-regexp', `bs-must-show-function',
282 `bs-dont-show-regexp', `bs-dont-show-function' and `bs-buffer-sort-function'.
283 By setting these variables you define a configuration."
288 "*Name of default configuration used by the Buffer Selection Menu.
291 Must be a string used in `bs-configurations' for naming a configuration."
296 "*Name of configuration used when calling `bs-show' with \
298 Must be a string used in `bs-configurations' for naming a configuration."
303 "Name of current configuration.
307 "*Name of configuration used when cycling through the buffer list.
308 A value of nil means to use current configuration `bs-default-configuration'.
309 Must be a string used in `bs-configurations' for naming a configuration."
312 string))
315 "*String added in column 1 indicating a buffer will always be shown."
320 "*String added in column 1 indicating a buffer will never be shown."
325 "*String added in column 1 indicating the current buffer."
330 "*String added in column 1 indicating the current buffer when it is marked."
335 "*String added in column 1 indicating a marked buffer."
340 "*String added in column 1 indicating a unmarked buffer."
345 "Maximum length of all displayed buffer names.
348 ;; ----------------------------------------------------------------------
349 ;; Internal globals
350 ;; ----------------------------------------------------------------------
353 "Flag for the current mode for showing this buffer.
354 A value of nil means buffer will be shown depending on the current
355 configuration.
356 A value of `never' means to never show the buffer.
361 ;; Make face named region (for XEmacs)
367 "Compare buffers B1 and B2 by buffer name."
372 "Compare buffers B1 and B2 by file name."
377 "Compare buffers B1 and B2 by mode name."
383 "Compare buffers B1 and B2 by buffer size."
394 "*List of all possible sorting aspects for Buffer Selection Menu.
395 You can add a new entry with a call to `bs-define-sort-function'.
396 Each element is a list of four elements (NAME FUNCTION REGEXP-FOR-SORTING FACE)
397 NAME specifies the sort order defined by function FUNCTION.
398 FUNCTION nil means don't sort the buffer list. Otherwise the functions
399 must have two parameters - the buffers to compare.
400 REGEXP-FOR-SORTING is a regular expression which describes the
401 column title to highlight.
402 FACE is a face used to fontify the sorted column title. A value of nil means
403 don't highlight."
408 "Define a new function for buffer sorting in Buffer Selection Menu.
409 NAME specifies the sort order defined by function FUN.
410 A value of nil for FUN means don't sort the buffer list. Otherwise the
411 functions must have two parameters - the buffers to compare.
412 REGEXP-FOR-SORTING is a regular expression which describes the
413 column title to highlight.
414 FACE is a face used to fontify the sorted column title. A value of nil means
415 don't highlight.
416 The new sort aspect will be inserted into list `bs-sort-functions'."
422 bs-sort-functions)))))
425 "Description of the current function for sorting the buffer list.
429 "*Name of default sort behavior.
443 "Flag whether showing all buffers regardless of current configuration.
444 Non-nil means to show all buffers. Otherwise show buffers
452 "Regular expression specifying which buffers never to show.
453 A buffer whose name matches this regular expression will never be
457 "List of buffers shown in Buffer Selection Menu.
471 (define-key map "F" 'bs-select-other-frame)
472 (let ((key ?1))
473 (while (<= key ?9)
474 (define-key map (char-to-string key) 'digit-argument)
475 (setq key (1+ key))))
476 (define-key map "-" 'negative-argument)
477 (define-key map "\e-" 'negative-argument)
478 (define-key map "o" 'bs-select-other-window)
479 (define-key map "\C-o" 'bs-tmp-select-other-window)
480 ;; for GNU EMACS
481 (define-key map [mouse-3] 'bs-mouse-select-other-frame)
482 ;; for XEmacs
483 (define-key map [button3] 'bs-mouse-select-other-frame)
484 (define-key map [up] 'bs-up)
485 (define-key map "n" 'bs-down)
486 (define-key map "p" 'bs-up)
487 (define-key map [down] 'bs-down)
488 (define-key map "\C-m" 'bs-select)
489 (define-key map "b" 'bs-bury-buffer)
490 (define-key map "s" 'bs-save)
491 (define-key map "S" 'bs-show-sorted)
492 (define-key map "a" 'bs-toggle-show-all)
493 (define-key map "d" 'bs-delete)
494 (define-key map "\C-d" 'bs-delete-backward)
495 (define-key map "k" 'bs-delete)
496 (define-key map "g" 'bs-refresh)
497 (define-key map "C" 'bs-set-configuration-and-refresh)
498 (define-key map "c" 'bs-select-next-configuration)
499 (define-key map "q" 'bs-kill)
500 ;; (define-key map "z" 'bs-kill)
501 (define-key map "\C-c\C-c" 'bs-kill)
502 (define-key map "\C-g" 'bs-abort)
503 (define-key map "\C-]" 'bs-abort)
504 (define-key map "%" 'bs-toggle-readonly)
505 (define-key map "~" 'bs-clear-modified)
506 (define-key map "M" 'bs-toggle-current-to-show)
507 (define-key map "+" 'bs-set-current-buffer-to-show-always)
508 ;;(define-key map "-" 'bs-set-current-buffer-to-show-never)
509 (define-key map "t" 'bs-visit-tags-table)
510 (define-key map "m" 'bs-mark-current)
511 (define-key map "u" 'bs-unmark-current)
512 (define-key map ">" 'scroll-right)
513 (define-key map "<" 'scroll-left)
514 (define-key map "?" 'bs-help)
515 map)
516 "Keymap of `bs-mode'.")
518 ;; ----------------------------------------------------------------------
519 ;; Functions
520 ;; ----------------------------------------------------------------------
522 (defun bs-buffer-list (&optional list sort-description)
523 "Return a list of buffers to be shown.
524 LIST is a list of buffers to test for appearance in Buffer Selection Menu.
525 The result list depends on the global variables `bs-dont-show-regexp',
526 `bs-must-show-regexp', `bs-dont-show-function', `bs-must-show-function'
527 and `bs-buffer-sort-function'.
528 If SORT-DESCRIPTION isn't nil the list will be sorted by
529 a special function. SORT-DESCRIPTION is an element of `bs-sort-functions'."
530 (setq sort-description (or sort-description bs--current-sort-function)
531 list (or list (buffer-list)))
532 (let ((result nil))
533 (while list
534 (let* ((buffername (buffer-name (car list)))
535 (int-show-never (string-match bs--intern-show-never buffername))
536 (ext-show-never (and bs-dont-show-regexp
537 (string-match bs-dont-show-regexp
538 buffername)))
539 (extern-must-show (or (and bs-must-always-show-regexp
540 (string-match
541 bs-must-always-show-regexp
542 buffername))
543 (and bs-must-show-regexp
544 (string-match bs-must-show-regexp
545 buffername))))
546 (extern-show-never-from-fun (and bs-dont-show-function
547 (funcall bs-dont-show-function
548 (car list))))
549 (extern-must-show-from-fun (and bs-must-show-function
550 (funcall bs-must-show-function
551 (car list))))
552 (show-flag (buffer-local-value 'bs-buffer-show-mark (car list))))
553 (if (or (eq show-flag 'always)
554 (and (or bs--show-all (not (eq show-flag 'never)))
555 (not int-show-never)
556 (or bs--show-all
557 extern-must-show
558 extern-must-show-from-fun
559 (and (not ext-show-never)
560 (not extern-show-never-from-fun)))))
561 (setq result (cons (car list)
562 result)))
563 (setq list (cdr list))))
564 (setq result (reverse result))
565 ;; The current buffer which was the start point of bs should be an element
566 ;; of result list, so that we can leave with space and be back in the
567 ;; buffer we started bs-show.
568 (if (and bs--buffer-coming-from
569 (buffer-live-p bs--buffer-coming-from)
570 (not (memq bs--buffer-coming-from result)))
571 (setq result (cons bs--buffer-coming-from result)))
572 ;; sorting
573 (if (and sort-description
574 (nth 1 sort-description))
575 (setq result (sort result (nth 1 sort-description)))
576 ;; else standard sorting
577 (bs-buffer-sort result))))
579 (defun bs-buffer-sort (buffer-list)
580 "Sort buffers in BUFFER-LIST according to `bs-buffer-sort-function'."
581 (if bs-buffer-sort-function
582 (sort buffer-list bs-buffer-sort-function)
583 buffer-list))
585 (defun bs--redisplay (&optional keep-line-p sort-description)
586 "Redisplay whole Buffer Selection Menu.
587 If KEEP-LINE-P is non-nil the point will stay on current line.
588 SORT-DESCRIPTION is an element of `bs-sort-functions'."
589 (let ((line (1+ (count-lines 1 (point)))))
590 (bs-show-in-buffer (bs-buffer-list nil sort-description))
591 (if keep-line-p
592 (goto-line line))
593 (beginning-of-line)))
595 (defun bs--goto-current-buffer ()
596 "Goto line which represents the current buffer;
597 actually the line which begins with character in `bs-string-current' or
598 `bs-string-current-marked'."
599 (let ((regexp (concat "^"
600 (regexp-quote bs-string-current)
602 (regexp-quote bs-string-current-marked)))
603 point)
604 (save-excursion
605 (goto-char (point-min))
606 (if (search-forward-regexp regexp nil t)
607 (setq point (- (point) 1))))
608 (if point
609 (goto-char point))))
611 (defun bs--current-config-message ()
612 "Return a string describing the current `bs-mode' configuration."
613 (if bs--show-all
614 "Show all buffers."
615 (format "Show buffer by configuration %S"
616 bs-current-configuration)))
618 (defun bs-mode ()
619 "Major mode for editing a subset of Emacs' buffers.
621 Aside from two header lines each line describes one buffer.
622 Move to a line representing the buffer you want to edit and select
624 There are many key commands similar to `Buffer-menu-mode' for
625 manipulating the buffer list and buffers.
626 For faster navigation each digit key is a digit argument.
632 remain in Buffer Selection Menu.
642 apply selected configuration.
644 available Buffer Selection Menu configuration.
648 to show always.
651 (interactive)
652 (kill-all-local-variables)
653 (use-local-map bs-mode-map)
654 (make-local-variable 'font-lock-defaults)
655 (make-local-variable 'font-lock-verbose)
656 (buffer-disable-undo)
657 (setq major-mode 'bs-mode
658 mode-name "Buffer-Selection-Menu"
659 buffer-read-only t
660 truncate-lines t
661 font-lock-defaults '(bs-mode-font-lock-keywords t)
662 font-lock-verbose nil)
663 (run-mode-hooks 'bs-mode-hook))
665 (defun bs--restore-window-config ()
666 "Restore window configuration on the current frame."
667 (when bs--window-config-coming-from
668 (set-window-configuration bs--window-config-coming-from)
669 (setq bs--window-config-coming-from nil)))
671 (defun bs-kill ()
672 "Let buffer disappear and reset window-configuration."
673 (interactive)
674 (bury-buffer (current-buffer))
675 (bs--restore-window-config))
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--set-window-height ()
696 "Change the height of the selected window to suit the current buffer list."
697 (unless (one-window-p t)
698 (fit-window-to-buffer (selected-window) bs-max-window-height)))
700 (defun bs--current-buffer ()
701 "Return buffer on current line.
702 Raise an error if not on a buffer line."
703 (beginning-of-line)
704 (let ((line (+ (- bs-header-lines-length)
705 (count-lines 1 (point)))))
706 (if (< line 0)
707 (error "You are on a header row"))
708 (nth line bs-current-list)))
710 (defun bs--update-current-line ()
711 "Update the entry on current line for Buffer Selection Menu."
712 (let ((buffer (bs--current-buffer))
713 (inhibit-read-only t))
714 (beginning-of-line)
715 (delete-region (point) (line-end-position))
716 (bs--insert-one-entry buffer)
717 (beginning-of-line)))
719 (defun bs-view ()
720 "View current line's buffer in View mode.
721 Leave Buffer Selection Menu."
722 (interactive)
723 (view-buffer (bs--current-buffer)))
725 (defun bs-select ()
726 "Select current line's buffer and other marked buffers.
727 If there are no marked buffers the window configuration before starting
728 Buffer Selectin Menu will be restored.
729 If there are marked buffers each marked buffer and the current line's buffer
730 will be selected in a window.
731 Leave Buffer Selection Menu."
732 (interactive)
733 (let ((buffer (bs--current-buffer)))
734 (bury-buffer (current-buffer))
735 (bs--restore-window-config)
736 (switch-to-buffer buffer)
737 (if bs--marked-buffers
738 ;; Some marked buffers for selection
739 (let* ((all (delq buffer bs--marked-buffers))
740 (height (/ (1- (frame-height)) (1+ (length all)))))
741 (delete-other-windows)
742 (switch-to-buffer buffer)
743 (while all
744 (split-window nil height)
745 (other-window 1)
746 (switch-to-buffer (car all))
747 (setq all (cdr all)))
748 ;; goto window we have started bs.
749 (other-window 1)))))
751 (defun bs-select-other-window ()
752 "Select current line's buffer by `switch-to-buffer-other-window'.
753 The window configuration before starting Buffer Selectin Menu will be restored
754 unless there is no other window. In this case a new window will be created.
755 Leave Buffer Selection Menu."
756 (interactive)
757 (let ((buffer (bs--current-buffer)))
758 (bury-buffer (current-buffer))
759 (bs--restore-window-config)
760 (switch-to-buffer-other-window buffer)))
762 (defun bs-tmp-select-other-window ()
763 "Make the other window select this line's buffer.
764 The current window remains selected."
765 (interactive)
766 (let ((buffer (bs--current-buffer)))
767 (display-buffer buffer t)))
769 (defun bs-select-other-frame ()
770 "Select current line's buffer in new created frame.
771 Leave Buffer Selection Menu."
772 (interactive)
773 (let ((buffer (bs--current-buffer)))
774 (bury-buffer (current-buffer))
775 (bs--restore-window-config)
776 (switch-to-buffer-other-frame buffer)))
778 (defun bs-mouse-select-other-frame (event)
779 "Select selected line's buffer in new created frame.
780 Leave Buffer Selection Menu.
781 EVENT: a mouse click EVENT."
782 (interactive "e")
783 (mouse-set-point event)
784 (bs-select-other-frame))
786 (defun bs-mouse-select (event)
787 "Select buffer on mouse click EVENT.
788 Select buffer by `bs-select'."
789 (interactive "e")
790 (mouse-set-point event)
791 (bs-select))
793 (defun bs-select-in-one-window ()
794 "Select current line's buffer in one window and delete other windows.
795 Leave Buffer Selection Menu."
796 (interactive)
797 (bs-select)
798 (delete-other-windows))
800 (defun bs-bury-buffer ()
801 "Bury buffer on current line."
802 (interactive)
803 (bury-buffer (bs--current-buffer))
804 (bs--redisplay t))
806 (defun bs-save ()
807 "Save buffer on current line."
808 (interactive)
809 (let ((buffer (bs--current-buffer)))
810 (save-excursion
811 (set-buffer buffer)
812 (save-buffer))
813 (bs--update-current-line)))
815 (defun bs-visit-tags-table ()
816 "Visit the tags table in the buffer on this line.
817 See `visit-tags-table'."
818 (interactive)
819 (let ((file (buffer-file-name (bs--current-buffer))))
820 (if file
821 (visit-tags-table file)
822 (error "Specified buffer has no file"))))
824 (defun bs-toggle-current-to-show ()
825 "Toggle status of showing flag for buffer in current line."
826 (interactive)
827 (let ((buffer (bs--current-buffer))
828 res)
829 (save-excursion
830 (set-buffer buffer)
831 (setq res (cond ((null bs-buffer-show-mark)
832 'never)
833 ((eq bs-buffer-show-mark 'never)
834 'always)
835 (t nil)))
836 (setq bs-buffer-show-mark res))
837 (bs--update-current-line)
838 (bs--set-window-height)
839 (bs--show-config-message res)))
841 (defun bs-set-current-buffer-to-show-always (&optional not-to-show-p)
842 "Toggle status of buffer on line to `always shown'.
843 NOT-TO-SHOW-P: prefix argument.
844 With no prefix argument the buffer on current line is marked to show
845 always. Otherwise it is marked to show never."
846 (interactive "P")
847 (if not-to-show-p
848 (bs-set-current-buffer-to-show-never)
849 (bs--set-toggle-to-show (bs--current-buffer) 'always)))
851 (defun bs-set-current-buffer-to-show-never ()
852 "Toggle status of buffer on line to `never shown'."
853 (interactive)
854 (bs--set-toggle-to-show (bs--current-buffer) 'never))
856 (defun bs--set-toggle-to-show (buffer what)
857 "Set value `bs-buffer-show-mark' of buffer BUFFER to WHAT.
858 Redisplay current line and display a message describing
859 the status of buffer on current line."
860 (with-current-buffer buffer (setq bs-buffer-show-mark what))
861 (bs--update-current-line)
862 (bs--set-window-height)
863 (bs--show-config-message what))
865 (defun bs-mark-current (count)
866 "Mark buffers.
867 COUNT is the number of buffers to mark.
868 Move cursor vertically down COUNT lines."
869 (interactive "p")
870 (let ((dir (if (> count 0) 1 -1))
871 (count (abs count)))
872 (while (> count 0)
873 (let ((buffer (bs--current-buffer)))
874 (if buffer
875 (setq bs--marked-buffers (cons buffer bs--marked-buffers)))
876 (bs--update-current-line)
877 (bs-down dir))
878 (setq count (1- count)))))
880 (defun bs-unmark-current (count)
881 "Unmark buffers.
882 COUNT is the number of buffers to unmark.
883 Move cursor vertically down COUNT lines."
884 (interactive "p")
885 (let ((dir (if (> count 0) 1 -1))
886 (count (abs count)))
887 (while (> count 0)
888 (let ((buffer (bs--current-buffer)))
889 (if buffer
890 (setq bs--marked-buffers (delq buffer bs--marked-buffers)))
891 (bs--update-current-line)
892 (bs-down dir))
893 (setq count (1- count)))))
895 (defun bs--show-config-message (what)
896 "Show message indicating the new showing status WHAT.
897 WHAT is a value of nil, `never', or `always'."
898 (bs-message-without-log (cond ((null what)
899 "Buffer will be shown normally.")
900 ((eq what 'never)
901 "Mark buffer to never be shown.")
902 (t "Mark buffer to show always."))))
904 (defun bs-delete ()
905 "Kill buffer on current line."
906 (interactive)
907 (let ((current (bs--current-buffer))
908 (inhibit-read-only t))
909 (unless (kill-buffer current)
910 (error "Buffer was not deleted"))
911 (setq bs-current-list (delq current bs-current-list))
912 (beginning-of-line)
913 (delete-region (point) (save-excursion
914 (end-of-line)
915 (if (eobp) (point) (1+ (point)))))
916 (if (eobp)
917 (progn
918 (backward-delete-char 1)
919 (beginning-of-line)
920 (recenter -1)))
921 (bs--set-window-height)))
923 (defun bs-delete-backward ()
924 "Like `bs-delete' but go to buffer in front of current."
925 (interactive)
926 (let ((on-last-line-p (save-excursion (end-of-line) (eobp))))
927 (bs-delete)
928 (unless on-last-line-p
929 (bs-up 1))))
931 (defun bs-show-sorted ()
932 "Show buffer list sorted by buffer name."
933 (interactive)
934 (setq bs--current-sort-function
935 (bs-next-config-aux (car bs--current-sort-function)
936 bs-sort-functions))
937 (bs--redisplay)
938 (bs--goto-current-buffer)
939 (bs-message-without-log "Sorted %s" (car bs--current-sort-function)))
941 (defun bs-apply-sort-faces (&optional sort-description)
942 "Set text properties for the sort described by SORT-DESCRIPTION.
943 SORT-DESCRIPTION is an element of `bs-sort-functions'.
944 Default is `bs--current-sort-function'."
945 (let ((sort-description (or sort-description
946 bs--current-sort-function)))
947 (save-excursion
948 (goto-char (point-min))
949 (if (and (nth 2 sort-description)
950 (search-forward-regexp (nth 2 sort-description) nil t))
951 (let ((inhibit-read-only t))
952 (put-text-property (match-beginning 0)
953 (match-end 0)
954 'face
955 (or (nth 3 sort-description)
956 'region)))))))
958 (defun bs-toggle-show-all ()
959 "Toggle show all buffers / show buffers with current configuration."
960 (interactive)
961 (setq bs--show-all (not bs--show-all))
962 (bs--redisplay)
963 (bs--goto-current-buffer)
964 (bs-message-without-log "%s" (bs--current-config-message)))
966 (defun bs-toggle-readonly ()
967 "Toggle read-only status for buffer on current line.
968 Uses function `vc-toggle-read-only'."
969 (interactive)
970 (let ((buffer (bs--current-buffer)))
971 (save-excursion
972 (set-buffer buffer)
973 (vc-toggle-read-only))
974 (bs--update-current-line)))
976 (defun bs-clear-modified ()
977 "Set modified flag for buffer on current line to nil."
978 (interactive)
979 (let ((buffer (bs--current-buffer)))
980 (save-excursion
981 (set-buffer buffer)
982 (set-buffer-modified-p nil)))
983 (bs--update-current-line))
985 (defun bs--nth-wrapper (count fun &rest args)
986 "Call COUNT times function FUN with arguments ARGS."
987 (setq count (or count 1))
988 (while (> count 0)
989 (apply fun args)
990 (setq count (1- count))))
992 (defun bs-up (arg)
993 "Move cursor vertically up ARG lines in Buffer Selection Menu."
994 (interactive "p")
995 (if (and arg (numberp arg) (< arg 0))
996 (bs--nth-wrapper (- arg) 'bs--down)
997 (bs--nth-wrapper arg 'bs--up)))
999 (defun bs--up ()
1000 "Move cursor vertically up one line.
1001 If on top of buffer list go to last line."
1002 (if (> (count-lines 1 (point)) bs-header-lines-length)
1003 (forward-line -1)
1004 (goto-char (point-max))
1005 (beginning-of-line)
1006 (recenter -1)))
1008 (defun bs-down (arg)
1009 "Move cursor vertically down ARG lines in Buffer Selection Menu."
1010 (interactive "p")
1011 (if (and arg (numberp arg) (< arg 0))
1012 (bs--nth-wrapper (- arg) 'bs--up)
1013 (bs--nth-wrapper arg 'bs--down)))
1015 (defun bs--down ()
1016 "Move cursor vertically down one line.
1017 If at end of buffer list go to first line."
1018 (if (eq (line-end-position) (point-max))
1019 (goto-line (1+ bs-header-lines-length))
1020 (forward-line 1)))
1022 (defun bs-visits-non-file (buffer)
1023 "Return t or nil whether BUFFER visits no file.
1024 A value of t means BUFFER belongs to no file.
1025 A value of nil means BUFFER belongs to a file."
1026 (not (buffer-file-name buffer)))
1028 (defun bs-sort-buffer-interns-are-last (b1 b2)
1029 "Function for sorting internal buffers B1 and B2 at the end of all buffers."
1032 ;; ----------------------------------------------------------------------
1033 ;; Configurations:
1034 ;; ----------------------------------------------------------------------
1036 (defun bs-config-clear ()
1037 "*Reset all variables which specify a configuration.
1038 These variables are `bs-dont-show-regexp', `bs-must-show-regexp',
1039 `bs-dont-show-function', `bs-must-show-function' and
1040 `bs-buffer-sort-function'."
1041 (setq bs-dont-show-regexp nil
1042 bs-must-show-regexp nil
1043 bs-dont-show-function nil
1044 bs-must-show-function nil
1045 bs-buffer-sort-function nil))
1047 (defun bs-config--only-files ()
1048 "Define a configuration for showing only buffers visiting a file."
1049 (bs-config-clear)
1050 (setq ;; I want to see *-buffers at the end
1051 bs-buffer-sort-function 'bs-sort-buffer-interns-are-last
1052 ;; Don't show files who don't belong to a file
1053 bs-dont-show-function 'bs-visits-non-file))
1055 (defun bs-config--files-and-scratch ()
1056 "Define a configuration for showing buffer *scratch* and file buffers."
1057 (bs-config-clear)
1058 (setq ;; I want to see *-buffers at the end
1059 bs-buffer-sort-function 'bs-sort-buffer-interns-are-last
1060 ;; Don't show files who don't belong to a file
1061 bs-dont-show-function 'bs-visits-non-file
1062 ;; Show *scratch* buffer.
1065 (defun bs-config--all ()
1066 "Define a configuration for showing all buffers.
1067 Reset all according variables by `bs-config-clear'."
1068 (bs-config-clear))
1070 (defun bs-config--all-intern-last ()
1071 "Define a configuration for showing all buffers.
1072 Internal buffers appear at end of all buffers."
1073 (bs-config-clear)
1074 ;; I want to see *-buffers at the end
1075 (setq bs-buffer-sort-function 'bs-sort-buffer-interns-are-last))
1077 (defun bs-set-configuration (name)
1078 "Set configuration to the one saved under string NAME in `bs-configurations'.
1079 When called interactively ask user for a configuration and apply selected
1080 configuration."
1081 (interactive (list (completing-read "Use configuration: "
1082 bs-configurations
1083 nil
1084 t)))
1085 (let ((list (assoc name bs-configurations)))
1086 (if list
1087 (if (listp list)
1088 (setq bs-current-configuration name
1089 bs-must-show-regexp (nth 1 list)
1090 bs-must-show-function (nth 2 list)
1091 bs-dont-show-regexp (nth 3 list)
1092 bs-dont-show-function (nth 4 list)
1093 bs-buffer-sort-function (nth 5 list))
1094 ;; for backward compability
1095 (funcall (cdr list)))
1096 ;; else
1097 (ding)
1098 (bs-message-without-log "No bs-configuration named %S." name))))
1100 (defun bs-help ()
1101 "Help for `bs-show'."
1102 (interactive)
1103 (describe-function 'bs-mode))
1105 (defun bs-next-config-aux (start-name list)
1106 "Get the next assoc after START-NAME in list LIST.
1107 Will return the first if START-NAME is at end."
1108 (let ((assocs list)
1109 (length (length list))
1110 pos)
1111 (while (and assocs (not pos))
1112 (if (string= (car (car assocs)) start-name)
1113 (setq pos (- length (length assocs))))
1114 (setq assocs (cdr assocs)))
1115 (setq pos (1+ pos))
1116 (if (eq pos length)
1117 (car list)
1118 (nth pos list))))
1120 (defun bs-next-config (name)
1121 "Return next configuration with respect to configuration with name NAME."
1122 (bs-next-config-aux name bs-configurations))
1124 (defun bs-select-next-configuration (&optional start-name)
1125 "Apply next configuration START-NAME and refresh buffer list.
1126 If START-NAME is nil the current configuration `bs-current-configuration'
1127 will be used."
1128 (interactive)
1129 (let ((config (bs-next-config (or start-name bs-current-configuration))))
1130 (bs-set-configuration (car config))
1131 (setq bs-default-configuration bs-current-configuration)
1132 (bs--redisplay t)
1133 (bs--set-window-height)
1134 (bs-message-without-log "Selected configuration: %s" (car config))))
1136 (defun bs-show-in-buffer (list)
1137 "Display buffer list LIST in buffer *buffer-selection*.
1138 Select buffer *buffer-selection* and display buffers according to current
1139 configuration `bs-current-configuration'. Set window height, fontify buffer
1140 and move point to current buffer."
1141 (setq bs-current-list list)
1142 (switch-to-buffer (get-buffer-create "*buffer-selection*"))
1143 (bs-mode)
1144 (let* ((inhibit-read-only t)
1145 (map-fun (lambda (entry)
1146 (length (buffer-name entry))))
1147 (max-length-of-names (apply 'max
1148 (cons 0 (mapcar map-fun list))))
1149 (name-entry-length (min bs-maximal-buffer-name-column
1150 (max bs-minimal-buffer-name-column
1151 max-length-of-names))))
1152 (erase-buffer)
1153 (setq bs--name-entry-length name-entry-length)
1154 (bs--show-header)
1155 (while list
1156 (bs--insert-one-entry (car list))
1158 (setq list (cdr list)))
1159 (delete-backward-char 1)
1160 (bs--set-window-height)
1161 (bs--goto-current-buffer)
1162 (font-lock-fontify-buffer)
1163 (bs-apply-sort-faces)
1164 (set-buffer-modified-p nil)))
1166 (defun bs-next-buffer (&optional buffer-list sorting-p)
1167 "Return next buffer and buffer list for buffer cycling in BUFFER-LIST.
1168 Ignore sorting when SORTING-P is nil.
1169 If BUFFER-LIST is nil the result of `bs-buffer-list' will be used as
1170 buffer list. The result is a cons of normally the second element of
1171 BUFFER-LIST and the buffer list used for buffer cycling."
1172 (let* ((bs--current-sort-function (if sorting-p
1173 bs--current-sort-function))
1174 (bs-buffer-list (or buffer-list (bs-buffer-list))))
1175 (cons (or (car (cdr bs-buffer-list))
1176 (car bs-buffer-list)
1177 (current-buffer))
1178 bs-buffer-list)))
1180 (defun bs-previous-buffer (&optional buffer-list sorting-p)
1181 "Return previous buffer and buffer list for buffer cycling in BUFFER-LIST.
1182 Ignore sorting when SORTING-P is nil.
1183 If BUFFER-LIST is nil the result of `bs-buffer-list' will be used as
1184 buffer list. The result is a cons of last element of BUFFER-LIST and the
1185 buffer list used for buffer cycling."
1186 (let* ((bs--current-sort-function (if sorting-p
1187 bs--current-sort-function))
1188 (bs-buffer-list (or buffer-list (bs-buffer-list))))
1189 (cons (or (car (last bs-buffer-list))
1190 (current-buffer))
1191 bs-buffer-list)))
1193 (defun bs-message-without-log (&rest args)
1194 "Like `message' but don't log it on the message log.
1195 All arguments ARGS are transferred to function `message'."
1196 (let ((message-log-max nil))
1197 (apply 'message args)))
1199 (defvar bs--cycle-list nil
1200 "Current buffer list used for cycling.")
1202 ;;;###autoload
1203 (defun bs-cycle-next ()
1204 "Select next buffer defined by buffer cycling.
1205 The buffers taking part in buffer cycling are defined
1206 by buffer configuration `bs-cycle-configuration-name'."
1207 (interactive)
1208 (let ((bs--buffer-coming-from (current-buffer))
1209 (bs-dont-show-regexp bs-dont-show-regexp)
1210 (bs-must-show-regexp bs-must-show-regexp)
1211 (bs-dont-show-function bs-dont-show-function)
1212 (bs-must-show-function bs-must-show-function)
1213 (bs--show-all nil))
1214 (bs-set-configuration (or bs-cycle-configuration-name bs-default-configuration))
1215 (let ((bs-buffer-sort-function nil)
1216 (bs--current-sort-function nil))
1217 (let* ((tupel (bs-next-buffer (if (or (eq last-command
1218 'bs-cycle-next)
1219 (eq last-command
1220 'bs-cycle-previous))
1221 bs--cycle-list)))
1222 (next (car tupel))
1223 (cycle-list (cdr tupel)))
1224 (unless (window-dedicated-p (selected-window))
1225 ;; We don't want the frame iconified if the only window in the frame
1226 ;; happens to be dedicated; let's get the error from switch-to-buffer
1227 (bury-buffer))
1228 (switch-to-buffer next)
1229 (setq bs--cycle-list (append (cdr cycle-list)
1230 (list (car cycle-list))))
1231 (bs-message-without-log "Next buffers: %s"
1232 (or (cdr bs--cycle-list)
1233 "this buffer"))))))
1235 ;;;###autoload
1236 (defun bs-cycle-previous ()
1237 "Select previous buffer defined by buffer cycling.
1238 The buffers taking part in buffer cycling are defined
1239 by buffer configuration `bs-cycle-configuration-name'."
1240 (interactive)
1241 (let ((bs--buffer-coming-from (current-buffer))
1242 (bs-dont-show-regexp bs-dont-show-regexp)
1243 (bs-must-show-regexp bs-must-show-regexp)
1244 (bs-dont-show-function bs-dont-show-function)
1245 (bs-must-show-function bs-must-show-function)
1246 (bs--show-all nil))
1247 (bs-set-configuration (or bs-cycle-configuration-name bs-default-configuration))
1248 (let ((bs-buffer-sort-function nil)
1249 (bs--current-sort-function nil))
1250 (let* ((tupel (bs-previous-buffer (if (or (eq last-command
1251 'bs-cycle-next)
1252 (eq last-command
1253 'bs-cycle-previous))
1254 bs--cycle-list)))
1255 (prev-buffer (car tupel))
1256 (cycle-list (cdr tupel)))
1257 (switch-to-buffer prev-buffer)
1258 (setq bs--cycle-list (append (last cycle-list)
1259 (reverse (cdr (reverse cycle-list)))))
1260 (bs-message-without-log "Previous buffers: %s"
1261 (or (reverse (cdr bs--cycle-list))
1262 "this buffer"))))))
1264 (defun bs--get-value (fun &optional args)
1265 "Apply function FUN with arguments ARGS.
1266 Return result of evaluation. Will return FUN if FUN is a number
1267 or a string."
1268 (cond ((numberp fun)
1269 fun)
1270 ((stringp fun)
1271 fun)
1272 (t (apply fun args))))
1274 (defun bs--get-marked-string (start-buffer all-buffers)
1275 "Return a string which describes whether current buffer is marked.
1276 START-BUFFER is the buffer where we started buffer selection.
1277 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu.
1278 The result string is one of `bs-string-current', `bs-string-current-marked',
1279 `bs-string-marked', `bs-string-show-normally', `bs-string-show-never', or
1280 `bs-string-show-always'."
1281 (cond ;; current buffer is the buffer we started buffer selection.
1282 ((eq (current-buffer) start-buffer)
1283 (if (memq (current-buffer) bs--marked-buffers)
1284 bs-string-current-marked ; buffer is marked
1285 bs-string-current))
1286 ;; current buffer is marked
1287 ((memq (current-buffer) bs--marked-buffers)
1288 bs-string-marked)
1289 ;; current buffer hasn't a special mark.
1290 ((null bs-buffer-show-mark)
1291 bs-string-show-normally)
1292 ;; current buffer has a mark not to show itself.
1293 ((eq bs-buffer-show-mark 'never)
1294 bs-string-show-never)
1295 ;; otherwise current buffer is marked to show always.
1296 (t
1297 bs-string-show-always)))
1299 (defun bs--get-modified-string (start-buffer all-buffers)
1300 "Return a string which describes whether current buffer is modified.
1301 START-BUFFER is the buffer where we started buffer selection.
1302 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu."
1303 (if (buffer-modified-p) "*" " "))
1305 (defun bs--get-readonly-string (start-buffer all-buffers)
1306 "Return a string which describes whether current buffer is read only.
1307 START-BUFFER is the buffer where we started buffer selection.
1308 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu."
1309 (if buffer-read-only "%" " "))
1311 (defun bs--get-size-string (start-buffer all-buffers)
1312 "Return a string which describes the size of current buffer.
1313 START-BUFFER is the buffer where we started buffer selection.
1314 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu."
1315 (int-to-string (buffer-size)))
1317 (defun bs--get-name (start-buffer all-buffers)
1318 "Return name of current buffer for Buffer Selection Menu.
1319 The name of current buffer gets additional text properties
1320 for mouse highlighting.
1321 START-BUFFER is the buffer where we started buffer selection.
1322 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu."
1323 (propertize (buffer-name)
1324 'help-echo "mouse-2: select this buffer, mouse-3: select in other frame"
1325 'mouse-face 'highlight))
1327 (defun bs--get-mode-name (start-buffer all-buffers)
1328 "Return the name of mode of current buffer for Buffer Selection Menu.
1329 START-BUFFER is the buffer where we started buffer selection.
1330 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu."
1331 mode-name)
1333 (defun bs--get-file-name (start-buffer all-buffers)
1334 "Return string for column 'File' in Buffer Selection Menu.
1335 This is the variable `buffer-file-name' of current buffer.
1336 If current mode is `dired-mode' or `shell-mode' it returns the
1337 default directory.
1338 START-BUFFER is the buffer where we started buffer selection.
1339 ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu."
1340 (propertize (if (member major-mode '(shell-mode dired-mode))
1341 default-directory
1342 (or buffer-file-name ""))
1343 'mouse-face 'highlight
1344 'help-echo "mouse-2: select this buffer, mouse-3: select in other frame"))
1346 (defun bs--insert-one-entry (buffer)
1347 "Generate one entry for buffer BUFFER in Buffer Selection Menu.
1348 It goes over all columns described in `bs-attributes-list'
1349 and evaluates corresponding string. Inserts string in current buffer;
1350 normally *buffer-selection*."
1351 (let ((string "")
1352 (columns bs-attributes-list)
1353 (to-much 0)
1354 (apply-args (append (list bs--buffer-coming-from bs-current-list))))
1355 (save-excursion
1356 (while columns
1357 (set-buffer buffer)
1358 (let ((min (bs--get-value (nth 1 (car columns))))
1359 ;;(max (bs--get-value (nth 2 (car columns)))) refered no more
1360 (align (nth 3 (car columns)))
1361 (fun (nth 4 (car columns)))
1362 (val nil)
1363 new-string)
1364 (setq val (bs--get-value fun apply-args))
1365 (setq new-string (bs--format-aux val align (- min to-much)))
1366 (setq string (concat string new-string))
1367 (if (> (length new-string) min)
1368 (setq to-much (- (length new-string) min)))
1369 ) ; let
1370 (setq columns (cdr columns))))
1371 (insert string)
1372 string))
1374 (defun bs--format-aux (string align len)
1375 "Generate a string with STRING with alignment ALIGN and length LEN.
1376 ALIGN is one of the symbols `left', `middle', or `right'."
1377 (let* ((width (length string))
1378 (len (max len width)))
1379 (format (format "%%%s%ds" (if (eq align 'right) "" "-") len)
1380 (if (eq align 'middle)
1381 (concat (make-string (/ (- len width) 2) ?\s) string)
1382 string))))
1384 (defun bs--show-header ()
1385 "Insert header for Buffer Selection Menu in current buffer."
1386 (mapcar '(lambda (string)
1388 (bs--create-header)))
1390 (defun bs--get-name-length ()
1391 "Return value of `bs--name-entry-length'."
1392 bs--name-entry-length)
1394 (defun bs--create-header ()
1395 "Return all header lines used in Buffer Selection Menu as a list of strings."
1396 (list (mapconcat (lambda (column)
1397 (bs--format-aux (bs--get-value (car column))
1398 (nth 3 column) ; align
1399 (bs--get-value (nth 1 column))))
1400 bs-attributes-list
1401 "")
1402 (mapconcat (lambda (column)
1403 (let ((length (length (bs--get-value (car column)))))
1404 (bs--format-aux (make-string length ?-)
1405 (nth 3 column) ; align
1406 (bs--get-value (nth 1 column)))))
1407 bs-attributes-list
1408 "")))
1410 (defun bs--show-with-configuration (name &optional arg)
1411 "Display buffer list of configuration with name NAME.
1412 Set configuration NAME and determine window for Buffer Selection Menu.
1413 Unless current buffer is buffer *buffer-selection* we have to save
1414 the buffer we started Buffer Selection Menu and the current window
1415 configuration to restore buffer and window configuration after a
1416 selection. If there is already a window displaying *buffer-selection*
1417 select this window for Buffer Selection Menu. Otherwise open a new
1418 window.
1419 The optional argument ARG is the prefix argument when calling a function
1420 for buffer selection."
1421 (bs-set-configuration name)
1422 (let ((bs--show-all (or bs--show-all arg)))
1423 (unless (string= "*buffer-selection*" (buffer-name))
1424 ;; Only when not in buffer *buffer-selection*
1425 ;; we have to set the buffer we started the command
1426 (setq bs--buffer-coming-from (current-buffer)))
1427 (let ((liste (bs-buffer-list))
1428 (active-window (get-window-with-predicate
1429 (lambda (w)
1430 (string= (buffer-name (window-buffer w))
1431 "*buffer-selection*")))))
1432 (if active-window
1433 (select-window active-window)
1434 (modify-frame-parameters nil
1435 (list (cons 'bs--window-config-coming-from
1436 (current-window-configuration))))
1437 (when (> (window-height (selected-window)) 7)
1438 (split-window-vertically)
1439 (other-window 1)))
1440 (bs-show-in-buffer liste)
1441 (bs-message-without-log "%s" (bs--current-config-message)))))
1443 (defun bs--configuration-name-for-prefix-arg (prefix-arg)
1444 "Convert prefix argument PREFIX-ARG to a name of a buffer configuration.
1445 If PREFIX-ARG is nil return `bs-default-configuration'.
1446 If PREFIX-ARG is an integer return PREFIX-ARG element of `bs-configurations'.
1447 Otherwise return `bs-alternative-configuration'."
1448 (cond ;; usually activation
1449 ((null prefix-arg)
1450 bs-default-configuration)
1451 ;; call with integer as prefix argument
1452 ((integerp prefix-arg)
1453 (if (and (< 0 prefix-arg) (<= prefix-arg (length bs-configurations)))
1454 (car (nth (1- prefix-arg) bs-configurations))
1455 bs-default-configuration))
1456 ;; call by prefix argument C-u
1457 (t bs-alternative-configuration)))
1459 ;; ----------------------------------------------------------------------
1460 ;; Main function bs-customize and bs-show
1461 ;; ----------------------------------------------------------------------
1463 ;;;###autoload
1464 (defun bs-customize ()
1465 "Customization of group bs for Buffer Selection Menu."
1466 (interactive)
1467 (customize-group "bs"))
1469 ;;;###autoload
1470 (defun bs-show (arg)
1471 "Make a menu of buffers so you can manipulate buffers or the buffer list.
1473 There are many key commands similar to `Buffer-menu-mode' for
1474 manipulating buffer list and buffers itself.
1475 User can move with [up] or [down], select a buffer
1479 With prefix argument ARG show a different buffer list. Function
1480 `bs--configuration-name-for-prefix-arg' determine accordingly
1481 name of buffer configuration."
1482 (interactive "P")
1483 (setq bs--marked-buffers nil)
1484 (bs--show-with-configuration (bs--configuration-name-for-prefix-arg arg)))
1486 ;; Now provide feature bs
1487 (provide 'bs)
1489 ;;; arch-tag: c0d9ab34-bf06-4368-ae9d-af88878e6802
1490 ;;; bs.el ends here