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6448a6b3 GM |
1 | ;;; bs.el --- menu for selecting and displaying buffers |
2 | ||
038e04cb | 3 | ;; Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc. |
6448a6b3 GM |
4 | ;; Author: Olaf Sylvester <Olaf.Sylvester@netsurf.de> |
5 | ;; Maintainer: Olaf Sylvester <Olaf.Sylvester@netsurf.de> | |
6 | ;; Keywords: convenience | |
7 | ||
8 | ;; This file is part of GNU Emacs. | |
9 | ||
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. | |
14 | ||
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. | |
19 | ||
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. | |
24 | ||
25 | ;;; Commentary: | |
26 | ||
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 | ;; ----------------------------------------------------------------------- | |
44 | ||
45 | ;;; Quick Installation und Customization: | |
46 | ||
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 | |
54 | ||
55 | ||
56 | ;;; More Commentary: | |
57 | ||
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 | ;; | |
880ed9f1 | 68 | ;; Additional features for Buffer Selection Menu: |
6448a6b3 GM |
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. | |
76 | ||
77 | ;;; Cycling through buffers | |
78 | ||
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. | |
91 | ||
92 | ;;; Customization: | |
93 | ||
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*. | |
128 | ||
129 | ;;; History: | |
130 | ||
131 | ;;; Code: | |
132 | ||
133 | ;; ---------------------------------------------------------------------- | |
134 | ;; Globals for customization | |
135 | ;; ---------------------------------------------------------------------- | |
136 | ||
137 | (defgroup bs nil | |
138 | "Buffer Selection: Maintaining buffers by buffer menu." | |
00a9f6a5 | 139 | :version "21.1" |
dc7904f5 DL |
140 | :link '(emacs-commentary-link "bs") |
141 | :link '(url-link "http://home.netsurf.de/olaf.sylvester/emacs") | |
6448a6b3 GM |
142 | :group 'convenience) |
143 | ||
880ed9f1 GM |
144 | (defgroup bs-appearance nil |
145 | "Buffer Selection appearance: Appearance of bs buffer menu." | |
6448a6b3 GM |
146 | :group 'bs) |
147 | ||
148 | (defcustom bs-attributes-list | |
149 | '(("" 1 1 left bs--get-marked-string) | |
150 | ("M" 1 1 left bs--get-modified-string) | |
151 | ("R" 2 2 left bs--get-readonly-string) | |
152 | ("Buffer" bs--get-name-length 10 left bs--get-name) | |
153 | ("" 1 1 left " ") | |
154 | ("Size" 8 8 right bs--get-size-string) | |
155 | ("" 1 1 left " ") | |
156 | ("Mode" 12 12 right bs--get-mode-name) | |
157 | ("" 2 2 left " ") | |
158 | ("File" 12 12 left bs--get-file-name) | |
159 | ("" 2 2 left " ")) | |
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: | |
c0cb1027 | 162 | \(HEADER MINIMUM-LENGTH MAXIMUM-LENGTH ALIGNMENT FUN-OR-STRING) |
6448a6b3 GM |
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. | |
880ed9f1 | 172 | The function gets as parameter the buffer where we have started |
6448a6b3 | 173 | buffer selection and the list of all buffers to show. The function must |
880ed9f1 GM |
174 | return a string representing the column's value." |
175 | :group 'bs-appearance | |
6448a6b3 GM |
176 | :type '(repeat sexp)) |
177 | ||
178 | (defvar bs--running-in-xemacs (string-match "XEmacs" (emacs-version)) | |
179 | "Non-nil when running under XEmacs.") | |
180 | ||
6448a6b3 GM |
181 | (defun bs--make-header-match-string () |
182 | "Return a regexp matching the first line of a Buffer Selection Menu buffer." | |
183 | (let ((res "^\\(") | |
880ed9f1 | 184 | (ele bs-attributes-list)) |
6448a6b3 GM |
185 | (while ele |
186 | (setq res (concat res (car (car ele)) " *")) | |
187 | (setq ele (cdr ele))) | |
188 | (concat res "$\\)"))) | |
189 | ||
d8754ce5 | 190 | ;; Font-Lock-Settings |
6448a6b3 | 191 | (defvar bs-mode-font-lock-keywords |
880ed9f1 | 192 | (list ;; header in font-lock-type-face |
dc7904f5 DL |
193 | (list (bs--make-header-match-string) |
194 | '(1 font-lock-type-face append) '(1 'bold append)) | |
195 | ;; Buffername embedded by * | |
196 | (list "^\\(.*\\*.*\\*.*\\)$" | |
a5b09d5a DL |
197 | 1 |
198 | ;; problem in XEmacs with font-lock-constant-face | |
199 | (if (facep 'font-lock-constant-face) | |
200 | 'font-lock-constant-face | |
201 | 'font-lock-comment-face)) | |
dc7904f5 DL |
202 | ;; Dired-Buffers |
203 | '("^..\\(.*Dired by .*\\)$" 1 font-lock-function-name-face) | |
204 | ;; the star for modified buffers | |
205 | '("^.\\(\\*\\) +[^\\*]" 1 font-lock-comment-face)) | |
6448a6b3 GM |
206 | "Default font lock expressions for Buffer Selection Menu.") |
207 | ||
208 | (defcustom bs-max-window-height 20 | |
209 | "*Maximal window height of Buffer Selection Menu." | |
880ed9f1 | 210 | :group 'bs-appearance |
6448a6b3 GM |
211 | :type 'integer) |
212 | ||
213 | (defvar bs-dont-show-regexp nil | |
214 | "Regular expression specifying which buffers not to show. | |
215 | A buffer whose name matches this regular expression will not be | |
216 | included in the buffer list.") | |
217 | ||
218 | (defvar bs-must-show-regexp nil | |
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 | |
224 | that must always be shown regardless of the configuration.") | |
225 | ||
226 | (defcustom bs-must-always-show-regexp nil | |
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." | |
230 | :group 'bs | |
231 | :type '(choice (const :tag "Nothing at all" nil) regexp)) | |
232 | ||
233 | (defvar bs-dont-show-function nil | |
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 | |
237 | Buffer Selection Menu.") | |
238 | ||
239 | (defvar bs-must-show-function nil | |
240 | "Function for specifying buffers which must be shown. | |
241 | The function gets one argument - the buffer to test.") | |
242 | ||
243 | (defvar bs-buffer-sort-function nil | |
244 | "Sort function to sort the buffers that appear in Buffer Selection Menu. | |
880ed9f1 | 245 | The function gets two arguments - the buffers to compare.") |
6448a6b3 GM |
246 | |
247 | (defcustom bs-maximal-buffer-name-column 45 | |
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'." | |
880ed9f1 | 253 | :group 'bs-appearance |
6448a6b3 GM |
254 | :type 'integer) |
255 | ||
256 | (defcustom bs-minimal-buffer-name-column 15 | |
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'." | |
880ed9f1 | 262 | :group 'bs-appearance |
6448a6b3 GM |
263 | :type 'integer) |
264 | ||
265 | (defconst bs-header-lines-length 2 | |
266 | "Number of lines for headers in Buffer Selection Menu.") | |
267 | ||
268 | (defcustom bs-configurations | |
269 | '(("all" nil nil nil nil nil) | |
270 | ("files" nil nil nil bs-visits-non-file bs-sort-buffer-interns-are-last) | |
880ed9f1 | 271 | ("files-and-scratch" "^\\*scratch\\*$" nil nil bs-visits-non-file |
6448a6b3 GM |
272 | bs-sort-buffer-interns-are-last) |
273 | ("all-intern-last" nil nil nil nil 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 | |
880ed9f1 | 276 | and also the order of buffers. A configuration is a list with |
6448a6b3 GM |
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 | |
880ed9f1 GM |
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'. | |
6448a6b3 | 281 | By setting these variables you define a configuration." |
880ed9f1 | 282 | :group 'bs-appearance |
6448a6b3 GM |
283 | :type '(repeat sexp)) |
284 | ||
285 | (defcustom bs-default-configuration "files" | |
880ed9f1 | 286 | "*Name of default configuration used by the Buffer Selection Menu. |
6448a6b3 GM |
287 | \\<bs-mode-map> |
288 | Will be changed using key \\[bs-select-next-configuration]. | |
289 | Must be a string used in `bs-configurations' for naming a configuration." | |
290 | :group 'bs | |
291 | :type 'string) | |
292 | ||
293 | (defcustom bs-alternative-configuration "all" | |
294 | "*Name of configuration used when calling `bs-show' with \ | |
295 | \\[universal-argument] as prefix key. | |
296 | Must be a string used in `bs-configurations' for naming a configuration." | |
297 | :group 'bs | |
298 | :type 'string) | |
299 | ||
300 | (defvar bs-current-configuration bs-default-configuration | |
301 | "Name of current configuration. | |
880ed9f1 | 302 | Must be a string used in `bs-configurations' for naming a configuration.") |
6448a6b3 GM |
303 | |
304 | (defcustom bs-cycle-configuration-name nil | |
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." | |
308 | :group 'bs | |
309 | :type '(choice (const :tag "like current configuration" nil) | |
310 | string)) | |
311 | ||
312 | (defcustom bs-string-show-always "+" | |
313 | "*String added in column 1 indicating a buffer will always be shown." | |
880ed9f1 | 314 | :group 'bs-appearance |
6448a6b3 GM |
315 | :type 'string) |
316 | ||
317 | (defcustom bs-string-show-never "-" | |
318 | "*String added in column 1 indicating a buffer will never be shown." | |
880ed9f1 | 319 | :group 'bs-appearance |
6448a6b3 GM |
320 | :type 'string) |
321 | ||
322 | (defcustom bs-string-current "." | |
323 | "*String added in column 1 indicating the current buffer." | |
880ed9f1 | 324 | :group 'bs-appearance |
6448a6b3 GM |
325 | :type 'string) |
326 | ||
327 | (defcustom bs-string-current-marked "#" | |
328 | "*String added in column 1 indicating the current buffer when it is marked." | |
880ed9f1 | 329 | :group 'bs-appearance |
6448a6b3 GM |
330 | :type 'string) |
331 | ||
332 | (defcustom bs-string-marked ">" | |
333 | "*String added in column 1 indicating a marked buffer." | |
880ed9f1 | 334 | :group 'bs-appearance |
6448a6b3 GM |
335 | :type 'string) |
336 | ||
337 | (defcustom bs-string-show-normally " " | |
338 | "*String added in column 1 indicating a unmarked buffer." | |
880ed9f1 | 339 | :group 'bs-appearance |
6448a6b3 GM |
340 | :type 'string) |
341 | ||
342 | (defvar bs--name-entry-length 20 | |
343 | "Maximum length of all displayed buffer names. | |
344 | Used internally, only.") | |
345 | ||
346 | ;; ---------------------------------------------------------------------- | |
880ed9f1 | 347 | ;; Internal globals |
6448a6b3 GM |
348 | ;; ---------------------------------------------------------------------- |
349 | ||
350 | (defvar bs-buffer-show-mark nil | |
351 | "Flag for the current mode for showing this buffer. | |
880ed9f1 GM |
352 | A value of nil means buffer will be shown depending on the current |
353 | configuration. | |
6448a6b3 GM |
354 | A value of `never' means to never show the buffer. |
355 | A value of `always' means to show buffer regardless of the configuration.") | |
356 | ||
357 | (make-variable-buffer-local 'bs-buffer-show-mark) | |
358 | ||
359 | ;; Make face named region (for XEmacs) | |
360 | (unless (facep 'region) | |
361 | (make-face 'region) | |
362 | (set-face-background 'region "gray75")) | |
363 | ||
6448a6b3 GM |
364 | (defun bs--sort-by-name (b1 b2) |
365 | "Compare buffers B1 and B2 by buffer name." | |
366 | (string< (buffer-name b1) | |
dc7904f5 | 367 | (buffer-name b2))) |
6448a6b3 GM |
368 | |
369 | (defun bs--sort-by-filename (b1 b2) | |
370 | "Compare buffers B1 and B2 by file name." | |
371 | (string< (or (buffer-file-name b1) "") | |
dc7904f5 | 372 | (or (buffer-file-name b2) ""))) |
6448a6b3 GM |
373 | |
374 | (defun bs--sort-by-mode (b1 b2) | |
375 | "Compare buffers B1 and B2 by mode name." | |
376 | (save-excursion | |
377 | (string< (progn (set-buffer b1) (format "%s" mode-name)) | |
dc7904f5 | 378 | (progn (set-buffer b2) (format "%s" mode-name))))) |
6448a6b3 GM |
379 | |
380 | (defun bs--sort-by-size (b1 b2) | |
381 | "Compare buffers B1 and B2 by buffer size." | |
382 | (save-excursion | |
383 | (< (progn (set-buffer b1) (buffer-size)) | |
384 | (progn (set-buffer b2) (buffer-size))))) | |
385 | ||
386 | (defcustom bs-sort-functions | |
387 | '(("by name" bs--sort-by-name "Buffer" region) | |
388 | ("by size" bs--sort-by-size "Size" region) | |
389 | ("by mode" bs--sort-by-mode "Mode" region) | |
390 | ("by filename" bs--sort-by-filename "File" region) | |
391 | ("by nothing" nil nil nil)) | |
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." | |
402 | :group 'bs | |
403 | :type '(repeat sexp)) | |
404 | ||
405 | (defun bs-define-sort-function (name fun &optional regexp-for-sorting face) | |
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'." | |
415 | (let ((tupel (assoc name bs-sort-functions))) | |
416 | (if tupel | |
dc7904f5 | 417 | (setcdr tupel (list fun regexp-for-sorting face)) |
6448a6b3 | 418 | (setq bs-sort-functions |
dc7904f5 DL |
419 | (cons (list name fun regexp-for-sorting face) |
420 | bs-sort-functions))))) | |
6448a6b3 GM |
421 | |
422 | (defvar bs--current-sort-function nil | |
423 | "Description of the current function for sorting the buffer list. | |
424 | This is an element of `bs-sort-functions'.") | |
425 | ||
426 | (defcustom bs-default-sort-name "by nothing" | |
427 | "*Name of default sort behavior. | |
428 | Must be \"by nothing\" or a string used in `bs-sort-functions' for | |
429 | naming a sort behavior. Default is \"by nothing\" which means no sorting." | |
430 | :group 'bs | |
431 | :type 'string | |
432 | :set (lambda (var-name value) | |
dc7904f5 DL |
433 | (set var-name value) |
434 | (setq bs--current-sort-function | |
435 | (assoc value bs-sort-functions)))) | |
6448a6b3 GM |
436 | |
437 | (defvar bs--buffer-coming-from nil | |
438 | "The buffer in which the user started the current Buffer Selection Menu.") | |
439 | ||
440 | (defvar bs--show-all nil | |
441 | "Flag whether showing all buffers regardless of current configuration. | |
442 | Non nil means to show all buffers. Otherwise show buffers | |
443 | defined by current configuration `bs-current-configuration'.") | |
444 | ||
445 | (defvar bs--window-config-coming-from nil | |
446 | "Window configuration before starting Buffer Selection Menu.") | |
447 | ||
448 | (defvar bs--intern-show-never "^ \\|\\*buffer-selection\\*" | |
449 | "Regular expression specifying which buffers never to show. | |
450 | A buffer whose name matches this regular expression will never be | |
451 | included in the buffer list.") | |
452 | ||
453 | (defvar bs-current-list nil | |
454 | "List of buffers shown in Buffer Selection Menu. | |
455 | Used internally, only.") | |
456 | ||
457 | (defvar bs--marked-buffers nil | |
458 | "Currently marked buffers in Buffer Selection Menu.") | |
459 | ||
460 | (defvar bs-mode-map () | |
461 | "Keymap of `bs-mode'.") | |
462 | ||
463 | (if bs-mode-map | |
464 | () | |
465 | (setq bs-mode-map (make-sparse-keymap)) | |
466 | (define-key bs-mode-map " " 'bs-select) | |
467 | (define-key bs-mode-map "f" 'bs-select) | |
468 | (define-key bs-mode-map "v" 'bs-view) | |
469 | (define-key bs-mode-map "!" 'bs-select-in-one-window) | |
470 | (define-key bs-mode-map [mouse-2] 'bs-mouse-select) ;; for GNU EMACS | |
471 | (define-key bs-mode-map [button2] 'bs-mouse-select) ;; for XEmacs | |
472 | (define-key bs-mode-map "F" 'bs-select-other-frame) | |
473 | ||
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)))) | |
478 | ||
479 | (define-key bs-mode-map "-" 'negative-argument) | |
480 | (define-key bs-mode-map "\e-" 'negative-argument) | |
481 | ||
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)) | |
522 | ||
523 | ;; ---------------------------------------------------------------------- | |
524 | ;; Functions | |
525 | ;; ---------------------------------------------------------------------- | |
526 | ||
527 | (defun bs-buffer-list (&optional list sort-description) | |
528 | "Return a list of buffers to be shown. | |
880ed9f1 | 529 | LIST is a list of buffers to test for appearance in Buffer Selection Menu. |
6448a6b3 GM |
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) | |
dc7904f5 | 536 | list (or list (buffer-list))) |
6448a6b3 GM |
537 | (let ((result nil)) |
538 | (while list | |
539 | (let* ((buffername (buffer-name (car list))) | |
dc7904f5 DL |
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)))) | |
6448a6b3 GM |
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 | |
dc7904f5 DL |
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))) | |
6448a6b3 GM |
579 | ;; sorting |
580 | (if (and sort-description | |
dc7904f5 DL |
581 | (nth 1 sort-description)) |
582 | (setq result (sort result (nth 1 sort-description))) | |
6448a6b3 GM |
583 | ;; else standard sorting |
584 | (bs-buffer-sort result)))) | |
585 | ||
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)) | |
591 | ||
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 | |
dc7904f5 | 599 | (goto-line line)) |
6448a6b3 GM |
600 | (beginning-of-line))) |
601 | ||
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'." | |
dc7904f5 DL |
606 | (let ((regexp (concat "^" |
607 | (regexp-quote bs-string-current) | |
608 | "\\|^" | |
609 | (regexp-quote bs-string-current-marked))) | |
610 | point) | |
6448a6b3 GM |
611 | (save-excursion |
612 | (goto-char (point-min)) | |
613 | (if (search-forward-regexp regexp nil t) | |
dc7904f5 | 614 | (setq point (- (point) 1)))) |
6448a6b3 | 615 | (if point |
dc7904f5 | 616 | (goto-char point)))) |
6448a6b3 GM |
617 | |
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" | |
dc7904f5 | 623 | bs-current-configuration))) |
6448a6b3 GM |
624 | |
625 | (defun bs-mode () | |
626 | "Major mode for editing a subset of Emacs' buffers. | |
627 | \\<bs-mode-map> | |
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 | |
630 | buffer by \\[bs-select] or SPC. Abort buffer list with \\[bs-kill]. | |
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. | |
634 | ||
635 | \\[bs-select] or SPACE -- select current line's buffer and other marked buffers. | |
636 | \\[bs-toggle-show-all] -- toggle between all buffers and a special subset. | |
637 | \\[bs-select-other-window] -- select current line's buffer in other window. | |
638 | \\[bs-tmp-select-other-window] -- make another window display that buffer and | |
639 | remain in Buffer Selection Menu. | |
640 | \\[bs-mouse-select] -- select current line's buffer and other marked buffers. | |
641 | \\[bs-save] -- save current line's buffer immediatly. | |
642 | \\[bs-delete] -- kill current line's buffer immediatly. | |
643 | \\[bs-toggle-readonly] -- toggle read-only status of current line's buffer. | |
644 | \\[bs-clear-modified] -- clear modified-flag on that buffer. | |
645 | \\[bs-mark-current] -- mark current line's buffer to be displayed. | |
646 | \\[bs-unmark-current] -- unmark current line's buffer to be displayed. | |
647 | \\[bs-show-sorted] -- display buffer list sorted by next sort aspect. | |
648 | \\[bs-set-configuration-and-refresh] -- ask user for a configuration and \ | |
649 | apply selected configuration. | |
650 | \\[bs-select-next-configuration] -- select and apply next \ | |
651 | available Buffer Selection Menu configuration. | |
652 | \\[bs-kill] -- leave Buffer Selection Menu without a selection. | |
880ed9f1 | 653 | \\[bs-toggle-current-to-show] -- toggle status of appearance. |
6448a6b3 GM |
654 | \\[bs-set-current-buffer-to-show-always] -- mark current line's buffer \ |
655 | to show always. | |
880ed9f1 | 656 | \\[bs-visit-tags-table] -- call `visit-tags-table' on current line's buffer. |
6448a6b3 GM |
657 | \\[bs-help] -- display this help text." |
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 | |
dc7904f5 DL |
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) | |
6448a6b3 GM |
669 | (run-hooks 'bs-mode-hook)) |
670 | ||
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)) | |
676 | ||
677 | (defun bs-abort () | |
678 | "Ding and leave Buffer Selection Menu without a selection." | |
dc7904f5 | 679 | (interactive) |
6448a6b3 GM |
680 | (ding) |
681 | (bs-kill)) | |
682 | ||
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)) | |
689 | ||
690 | (defun bs-refresh () | |
691 | "Refresh whole Buffer Selection Menu." | |
692 | (interactive) | |
693 | (bs--redisplay t)) | |
694 | ||
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) | |
dc7904f5 DL |
701 | (if (string= (buffer-name (window-buffer wind)) |
702 | buffer-name) | |
703 | (setq window wind)))) | |
6448a6b3 GM |
704 | window)) |
705 | ||
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)) | |
dc7904f5 DL |
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)))))) | |
6448a6b3 GM |
715 | |
716 | (defun bs--current-buffer () | |
717 | "Return buffer on current line. | |
880ed9f1 | 718 | Raise an error if not on a buffer line." |
6448a6b3 GM |
719 | (beginning-of-line) |
720 | (let ((line (+ (- bs-header-lines-length) | |
dc7904f5 | 721 | (count-lines 1 (point))))) |
6448a6b3 | 722 | (if (< line 0) |
dc7904f5 | 723 | (error "You are on a header row")) |
6448a6b3 GM |
724 | (nth line bs-current-list))) |
725 | ||
726 | (defun bs--update-current-line () | |
727 | "Update the entry on current line for Buffer Selection Menu." | |
728 | (let ((buffer (bs--current-buffer)) | |
dc7904f5 | 729 | (inhibit-read-only t)) |
6448a6b3 GM |
730 | (beginning-of-line) |
731 | (delete-region (point) (line-end-position)) | |
732 | (bs--insert-one-entry buffer) | |
733 | (beginning-of-line))) | |
734 | ||
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))) | |
740 | ||
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 | |
dc7904f5 DL |
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))))) | |
6448a6b3 GM |
766 | |
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))) | |
777 | ||
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))) | |
784 | ||
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))) | |
793 | ||
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)) | |
801 | ||
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)) | |
808 | ||
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)) | |
815 | ||
816 | (defun bs-bury-buffer () | |
817 | "Bury buffer on current line." | |
818 | (interactive) | |
819 | (bury-buffer (bs--current-buffer)) | |
820 | (bs--redisplay t)) | |
821 | ||
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))) | |
830 | ||
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 | |
dc7904f5 | 837 | (visit-tags-table file) |
6448a6b3 GM |
838 | (error "Specified buffer has no file")))) |
839 | ||
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)) | |
dc7904f5 | 844 | res) |
6448a6b3 GM |
845 | (save-excursion |
846 | (set-buffer buffer) | |
847 | (setq res (cond ((null bs-buffer-show-mark) | |
dc7904f5 DL |
848 | 'never) |
849 | ((eq bs-buffer-show-mark 'never) | |
850 | 'always) | |
851 | (t nil))) | |
6448a6b3 GM |
852 | (setq bs-buffer-show-mark res)) |
853 | (bs--update-current-line) | |
854 | (bs--set-window-height) | |
855 | (bs--show-config-message res))) | |
856 | ||
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))) | |
866 | ||
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)) | |
871 | ||
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)) | |
882 | ||
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)) | |
dc7904f5 | 889 | (count (abs count))) |
6448a6b3 GM |
890 | (while (> count 0) |
891 | (let ((buffer (bs--current-buffer))) | |
dc7904f5 DL |
892 | (if buffer |
893 | (setq bs--marked-buffers (cons buffer bs--marked-buffers))) | |
894 | (bs--update-current-line) | |
895 | (bs-down dir)) | |
6448a6b3 GM |
896 | (setq count (1- count))))) |
897 | ||
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)) | |
dc7904f5 | 904 | (count (abs count))) |
6448a6b3 GM |
905 | (while (> count 0) |
906 | (let ((buffer (bs--current-buffer))) | |
dc7904f5 DL |
907 | (if buffer |
908 | (setq bs--marked-buffers (delq buffer bs--marked-buffers))) | |
909 | (bs--update-current-line) | |
910 | (bs-down dir)) | |
6448a6b3 GM |
911 | (setq count (1- count))))) |
912 | ||
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) | |
dc7904f5 DL |
917 | "Buffer will be shown normally.") |
918 | ((eq what 'never) | |
919 | "Mark buffer to never be shown.") | |
920 | (t "Mark buffer to show always.")))) | |
6448a6b3 GM |
921 | |
922 | (defun bs-delete () | |
923 | "Kill buffer on current line." | |
924 | (interactive) | |
925 | (let ((current (bs--current-buffer)) | |
dc7904f5 | 926 | (inhibit-read-only t)) |
706e6a52 EZ |
927 | (unless (kill-buffer current) |
928 | (error "Buffer was not deleted")) | |
6448a6b3 | 929 | (setq bs-current-list (delq current bs-current-list)) |
6448a6b3 GM |
930 | (beginning-of-line) |
931 | (delete-region (point) (save-excursion | |
dc7904f5 DL |
932 | (end-of-line) |
933 | (if (eobp) (point) (1+ (point))))) | |
6448a6b3 | 934 | (if (eobp) |
dc7904f5 DL |
935 | (progn |
936 | (backward-delete-char 1) | |
937 | (beginning-of-line) | |
938 | (recenter -1))) | |
6448a6b3 GM |
939 | (bs--set-window-height))) |
940 | ||
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 | |
dc7904f5 | 947 | (bs-up 1)))) |
6448a6b3 GM |
948 | |
949 | (defun bs-show-sorted () | |
950 | "Show buffer list sorted by buffer name." | |
951 | (interactive) | |
952 | (setq bs--current-sort-function | |
dc7904f5 DL |
953 | (bs-next-config-aux (car bs--current-sort-function) |
954 | bs-sort-functions)) | |
6448a6b3 GM |
955 | (bs--redisplay) |
956 | (bs--goto-current-buffer) | |
957 | (bs-message-without-log "Sorted %s" (car bs--current-sort-function))) | |
958 | ||
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 | |
dc7904f5 | 964 | bs--current-sort-function))) |
6448a6b3 GM |
965 | (save-excursion |
966 | (goto-char (point-min)) | |
6968a481 EZ |
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))))))) | |
6448a6b3 GM |
975 | |
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))) | |
983 | ||
984 | (defun bs-toggle-readonly () | |
985 | "Toggle read-only status for buffer on current line. | |
880ed9f1 | 986 | Uses function `vc-toggle-read-only'." |
6448a6b3 GM |
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))) | |
993 | ||
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)) | |
1002 | ||
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)))) | |
1009 | ||
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))) | |
1016 | ||
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 | |
dc7904f5 DL |
1024 | (goto-char (point-max)) |
1025 | (beginning-of-line) | |
1026 | (recenter -1)) | |
6448a6b3 GM |
1027 | (beginning-of-line))) |
1028 | ||
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))) | |
1035 | ||
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)) | |
dc7904f5 | 1041 | (goto-line (1+ bs-header-lines-length)) |
6448a6b3 GM |
1042 | (next-line 1)))) |
1043 | ||
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))) | |
1049 | ||
1050 | (defun bs-sort-buffer-interns-are-last (b1 b2) | |
880ed9f1 | 1051 | "Function for sorting internal buffers B1 and B2 at the end of all buffers." |
6448a6b3 GM |
1052 | (string-match "^\\*" (buffer-name b2))) |
1053 | ||
1054 | ;; ---------------------------------------------------------------------- | |
1055 | ;; Configurations: | |
1056 | ;; ---------------------------------------------------------------------- | |
1057 | ||
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 | |
dc7904f5 DL |
1064 | bs-must-show-regexp nil |
1065 | bs-dont-show-function nil | |
1066 | bs-must-show-function nil | |
1067 | bs-buffer-sort-function nil)) | |
6448a6b3 GM |
1068 | |
1069 | (defun bs-config--only-files () | |
1070 | "Define a configuration for showing only buffers visiting a file." | |
1071 | (bs-config-clear) | |
880ed9f1 | 1072 | (setq ;; I want to see *-buffers at the end |
dc7904f5 DL |
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)) | |
6448a6b3 GM |
1076 | |
1077 | (defun bs-config--files-and-scratch () | |
1078 | "Define a configuration for showing buffer *scratch* and file buffers." | |
1079 | (bs-config-clear) | |
880ed9f1 | 1080 | (setq ;; I want to see *-buffers at the end |
dc7904f5 DL |
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. | |
880ed9f1 | 1085 | bs-must-show-regexp "^\\*scratch\\*$")) |
6448a6b3 GM |
1086 | |
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)) | |
1091 | ||
1092 | (defun bs-config--all-intern-last () | |
1093 | "Define a configuration for showing all buffers. | |
880ed9f1 | 1094 | Internal buffers appear at end of all buffers." |
6448a6b3 GM |
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)) | |
1098 | ||
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: " | |
dc7904f5 DL |
1104 | bs-configurations |
1105 | nil | |
1106 | t))) | |
6448a6b3 GM |
1107 | (let ((list (assoc name bs-configurations))) |
1108 | (if list | |
dc7904f5 DL |
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))) | |
6448a6b3 GM |
1118 | ;; else |
1119 | (ding) | |
1120 | (bs-message-without-log "No bs-configuration named %S." name)))) | |
1121 | ||
1122 | (defun bs-help () | |
1123 | "Help for `bs-show'." | |
1124 | (interactive) | |
1125 | (describe-function 'bs-mode)) | |
1126 | ||
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) | |
dc7904f5 DL |
1131 | (length (length list)) |
1132 | pos) | |
6448a6b3 GM |
1133 | (while (and assocs (not pos)) |
1134 | (if (string= (car (car assocs)) start-name) | |
dc7904f5 | 1135 | (setq pos (- length (length assocs)))) |
6448a6b3 GM |
1136 | (setq assocs (cdr assocs))) |
1137 | (setq pos (1+ pos)) | |
1138 | (if (eq pos length) | |
dc7904f5 | 1139 | (car list) |
6448a6b3 GM |
1140 | (nth pos list)))) |
1141 | ||
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)) | |
1145 | ||
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) | |
880ed9f1 | 1156 | (bs-message-without-log "Selected configuration: %s" (car config)))) |
6448a6b3 GM |
1157 | |
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) | |
dc7904f5 DL |
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)))) | |
6448a6b3 GM |
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)) | |
1179 | (insert "\n") | |
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))) | |
1186 | ||
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 | |
dc7904f5 DL |
1194 | bs--current-sort-function)) |
1195 | (bs-buffer-list (or buffer-list (bs-buffer-list)))) | |
6448a6b3 | 1196 | (cons (or (car (cdr bs-buffer-list)) |
dc7904f5 DL |
1197 | (car bs-buffer-list) |
1198 | (current-buffer)) | |
1199 | bs-buffer-list))) | |
6448a6b3 GM |
1200 | |
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 | |
dc7904f5 DL |
1208 | bs--current-sort-function)) |
1209 | (bs-buffer-list (or buffer-list (bs-buffer-list)))) | |
6448a6b3 | 1210 | (cons (or (car (last bs-buffer-list)) |
dc7904f5 DL |
1211 | (current-buffer)) |
1212 | bs-buffer-list))) | |
6448a6b3 GM |
1213 | |
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 transfered to function `message'." | |
1217 | (let ((message-log-max nil)) | |
1218 | (apply 'message args))) | |
1219 | ||
1220 | (defvar bs--cycle-list nil | |
880ed9f1 | 1221 | "Current buffer list used for cycling.") |
6448a6b3 GM |
1222 | |
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)) | |
dc7904f5 DL |
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) | |
038e04cb GM |
1234 | (bs--show-all nil)) |
1235 | (bs-set-configuration (or bs-cycle-configuration-name bs-default-configuration)) | |
6448a6b3 | 1236 | (let ((bs-buffer-sort-function nil) |
dc7904f5 | 1237 | (bs--current-sort-function nil)) |
6448a6b3 | 1238 | (let* ((tupel (bs-next-buffer (if (or (eq last-command |
dc7904f5 DL |
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")))))) | |
6448a6b3 GM |
1252 | |
1253 | ||
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)) | |
dc7904f5 DL |
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) | |
038e04cb GM |
1265 | (bs--show-all nil)) |
1266 | (bs-set-configuration (or bs-cycle-configuration-name bs-default-configuration)) | |
6448a6b3 | 1267 | (let ((bs-buffer-sort-function nil) |
dc7904f5 | 1268 | (bs--current-sort-function nil)) |
6448a6b3 | 1269 | (let* ((tupel (bs-previous-buffer (if (or (eq last-command |
dc7904f5 DL |
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")))))) | |
6448a6b3 GM |
1282 | |
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) | |
dc7904f5 DL |
1288 | fun) |
1289 | ((stringp fun) | |
1290 | fun) | |
1291 | (t (apply fun args)))) | |
6448a6b3 GM |
1292 | |
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'." | |
880ed9f1 | 1300 | (cond ;; current buffer is the buffer we started buffer selection. |
dc7904f5 DL |
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))) | |
6448a6b3 GM |
1317 | |
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) "*" " ")) | |
1323 | ||
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 "%" " ")) | |
1329 | ||
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))) | |
1335 | ||
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)))) | |
855eca56 EZ |
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) | |
6448a6b3 | 1349 | (if (< (length name) bs--name-entry-length) |
dc7904f5 DL |
1350 | (concat name |
1351 | (make-string (- bs--name-entry-length (length name)) ? )) | |
6448a6b3 GM |
1352 | name))) |
1353 | ||
6448a6b3 GM |
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) | |
1359 | ||
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. | |
00a9f6a5 | 1363 | If current mode is `dired-mode' or `shell-mode' it returns the |
6448a6b3 GM |
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 | |
dc7904f5 DL |
1368 | '(shell-mode dired-mode)) |
1369 | default-directory | |
1370 | (or buffer-file-name ""))))) | |
855eca56 EZ |
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) | |
6448a6b3 GM |
1376 | string)) |
1377 | ||
6448a6b3 GM |
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 "") | |
dc7904f5 DL |
1384 | (columns bs-attributes-list) |
1385 | (to-much 0) | |
6448a6b3 GM |
1386 | (apply-args (append (list bs--buffer-coming-from bs-current-list)))) |
1387 | (save-excursion | |
1388 | (while columns | |
dc7904f5 DL |
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)))) | |
6448a6b3 GM |
1403 | (insert string) |
1404 | string)) | |
1405 | ||
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) | |
dc7904f5 | 1411 | string |
6448a6b3 | 1412 | (if (eq 'right align) |
dc7904f5 DL |
1413 | (concat (make-string (- len length) ? ) string) |
1414 | (concat string (make-string (- len length) ? )))))) | |
6448a6b3 GM |
1415 | |
1416 | (defun bs--show-header () | |
1417 | "Insert header for Buffer Selection Menu in current buffer." | |
1418 | (mapcar '(lambda (string) | |
dc7904f5 DL |
1419 | (insert string "\n")) |
1420 | (bs--create-header))) | |
6448a6b3 GM |
1421 | |
1422 | (defun bs--get-name-length () | |
1423 | "Return value of `bs--name-entry-length'." | |
1424 | bs--name-entry-length) | |
1425 | ||
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) | |
dc7904f5 DL |
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 | ""))) | |
6448a6b3 GM |
1441 | |
1442 | (defun bs--show-with-configuration (name &optional arg) | |
880ed9f1 | 1443 | "Display buffer list of configuration with name NAME. |
6448a6b3 GM |
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))) | |
dc7904f5 | 1455 | (unless (string= "*buffer-selection*" (buffer-name)) |
6448a6b3 GM |
1456 | ;; Only when not in buffer *buffer-selection* |
1457 | ;; we have to set the buffer we started the command | |
1458 | (progn | |
dc7904f5 DL |
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))))) | |
6448a6b3 GM |
1471 | |
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'." | |
880ed9f1 | 1477 | (cond ;; usually activation |
dc7904f5 DL |
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))) | |
6448a6b3 GM |
1487 | |
1488 | ;; ---------------------------------------------------------------------- | |
1489 | ;; Main function bs-customize and bs-show | |
1490 | ;; ---------------------------------------------------------------------- | |
1491 | ||
1492 | ;;;###autoload | |
1493 | (defun bs-customize () | |
1494 | "Customization of group bs for Buffer Selection Menu." | |
1495 | (interactive) | |
1496 | (customize-group "bs")) | |
1497 | ||
1498 | ;;;###autoload | |
1499 | (defun bs-show (arg) | |
dc7904f5 | 1500 | "Make a menu of buffers so you can manipulate buffers or the buffer list. |
6448a6b3 GM |
1501 | \\<bs-mode-map> |
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 | |
1505 | by \\[bs-select] or [SPC]\n | |
1506 | Type \\[bs-kill] to leave Buffer Selection Menu without a selection. | |
1507 | Type \\[bs-help] after invocation to get help on commands available. | |
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))) | |
1514 | ||
d8754ce5 | 1515 | ;; Now provide feature bs |
6448a6b3 GM |
1516 | (provide 'bs) |
1517 | ||
1518 | ;;; bs.el ends here |