1;;; bs.el --- menu for selecting and displaying buffers 2 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 8 9;; This file is part of GNU Emacs. 10 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. 15 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. 20 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. 25 26;;; Commentary: 27 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;; ----------------------------------------------------------------------- 45 46;;; Quick Installation und Customization: 47 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 55 56 57;;; More Commentary: 58 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. 77 78;;; Cycling through buffers 79 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. 92 93;;; Customization: 94 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*. 129 130;;; History: 131 132;;; Code: 133 134(defvar font-lock-verbose) 135 136;; ---------------------------------------------------------------------- 137;; Globals for customization 138;; ---------------------------------------------------------------------- 139 140(defgroup bs nil 141 "Buffer Selection: Maintaining buffers by buffer menu." 142 :version "21.1" 143 :link '(emacs-commentary-link "bs") 144 :link '(url-link "http://www.geekware.de/software/emacs") 145 :group 'convenience) 146 147(defgroup bs-appearance nil 148 "Buffer Selection appearance: Appearance of bs buffer menu." 149 :group 'bs) 150 151(defcustom bs-attributes-list 152 '(("" 1 1 left bs--get-marked-string) 153 ("M" 1 1 left bs--get-modified-string) 154 ("R" 2 2 left bs--get-readonly-string) 155 ("Buffer" bs--get-name-length 10 left bs--get-name) 156 ("" 1 1 left " ") 157 ("Size" 8 8 right bs--get-size-string) 158 ("" 1 1 left " ") 159 ("Mode" 12 12 right bs--get-mode-name) 160 ("" 2 2 left " ") 161 ("File" 12 12 left bs--get-file-name) 162 ("" 2 2 left " ")) 163 "*List specifying the layout of a Buffer Selection Menu buffer. 164Each entry specifies a column and is a list of the form of: 165\(HEADER MINIMUM-LENGTH MAXIMUM-LENGTH ALIGNMENT FUN-OR-STRING) 166 167HEADER : String for header for first line or a function 168 which calculates column title. 169MINIMUM-LENGTH : Minimum width of column (number or name of function). 170 The function must return a positive integer. 171MAXIMUM-LENGTH : Maximum width of column (number or name of function) 172 (currently ignored). 173ALIGNMENT : Alignment of column (`left', `right', `middle'). 174FUN-OR-STRING : Name of a function for calculating the value or a 175 string for a constant value. 176 177The function gets as parameter the buffer where we have started 178buffer selection and the list of all buffers to show. The function must 179return a string representing the column's value." 180 :group 'bs-appearance 181 :type '(repeat sexp)) 182 183(defun bs--make-header-match-string () 184 "Return a regexp matching the first line of a Buffer Selection Menu buffer." 185 (let ((res "^\\(") 186 (ele bs-attributes-list)) 187 (while ele 188 (setq res (concat res (car (car ele)) " *")) 189 (setq ele (cdr ele))) 190 (concat res "$\\)"))) 191 192;; Font-Lock-Settings 193(defvar bs-mode-font-lock-keywords 194 (list ;; header in font-lock-type-face 195 (list (bs--make-header-match-string) 196 '(1 font-lock-type-face append) '(1 'bold append)) 197 ;; Buffername embedded by * 198 (list "^\\(.*\\*.*\\*.*\\)$" 199 1 200 ;; problem in XEmacs with font-lock-constant-face 201 (if (facep 'font-lock-constant-face) 202 'font-lock-constant-face 203 'font-lock-comment-face)) 204 ;; Dired-Buffers 205 '("^..\\(.*Dired by .*\\)$" 1 font-lock-function-name-face) 206 ;; the star for modified buffers 207 '("^.\\(\\*\\) +[^\\*]" 1 font-lock-comment-face)) 208 "Default font lock expressions for Buffer Selection Menu.") 209 210(defcustom bs-max-window-height 20 211 "*Maximal window height of Buffer Selection Menu." 212 :group 'bs-appearance 213 :type 'integer) 214 215(defvar bs-dont-show-regexp nil 216 "Regular expression specifying which buffers not to show. 217A buffer whose name matches this regular expression will not be 218included in the buffer list.") 219 220(defvar bs-must-show-regexp nil 221 "Regular expression for specifying buffers which must be shown. 222A buffer whose name matches this regular expression will be 223included in the buffer list. 224Note that this variable is temporary: if the configuration is changed 225it is reset to nil. Use `bs-must-always-show-regexp' to specify buffers 226that must always be shown regardless of the configuration.") 227 228(defcustom bs-must-always-show-regexp nil 229 "*Regular expression for specifying buffers to show always. 230A buffer whose name matches this regular expression will 231be shown regardless of current configuration of Buffer Selection Menu." 232 :group 'bs 233 :type '(choice (const :tag "Nothing at all" nil) regexp)) 234 235(defvar bs-dont-show-function nil 236 "Function for specifying buffers not to show. 237The function gets one argument - the buffer to test. The function must 238return a value different from nil to ignore the buffer in 239Buffer Selection Menu.") 240 241(defvar bs-must-show-function nil 242 "Function for specifying buffers which must be shown. 243The function gets one argument - the buffer to test.") 244 245(defvar bs-buffer-sort-function nil 246 "Sort function to sort the buffers that appear in Buffer Selection Menu. 247The function gets two arguments - the buffers to compare.") 248 249(defcustom bs-maximal-buffer-name-column 45 250 "*Maximum column width for buffer names. 251The column for buffer names has dynamic width. The width depends on 252maximal and minimal length of names of buffers to show. The maximal 253width is bounded by `bs-maximal-buffer-name-column'. 254See also `bs-minimal-buffer-name-column'." 255 :group 'bs-appearance 256 :type 'integer) 257 258(defcustom bs-minimal-buffer-name-column 15 259 "*Minimum column width for buffer names. 260The column for buffer names has dynamic width. The width depends on 261maximal and minimal length of names of buffers to show. The minimal 262width is bounded by `bs-minimal-buffer-name-column'. 263See also `bs-maximal-buffer-name-column'." 264 :group 'bs-appearance 265 :type 'integer) 266 267(defconst bs-header-lines-length 2 268 "Number of lines for headers in Buffer Selection Menu.") 269 270(defcustom bs-configurations 271 '(("all" nil nil nil nil nil) 272 ("files" nil nil nil bs-visits-non-file bs-sort-buffer-interns-are-last) 273 ("files-and-scratch" "^\\*scratch\\*$" nil nil bs-visits-non-file 274 bs-sort-buffer-interns-are-last) 275 ("all-intern-last" nil nil nil nil bs-sort-buffer-interns-are-last)) 276 "*List of all configurations you can use in the Buffer Selection Menu. 277A configuration describes which buffers appear in Buffer Selection Menu 278and also the order of buffers. A configuration is a list with 279six elements. The first element is a string and describes the configuration. 280The following five elements represent the values for Buffer Selection Menu 281configuration variables `bs-must-show-regexp', `bs-must-show-function', 282`bs-dont-show-regexp', `bs-dont-show-function' and `bs-buffer-sort-function'. 283By setting these variables you define a configuration." 284 :group 'bs-appearance 285 :type '(repeat sexp)) 286 287(defcustom bs-default-configuration "files" 288 "*Name of default configuration used by the Buffer Selection Menu. 289\\<bs-mode-map> 290Will be changed using key \\[bs-select-next-configuration]. 291Must be a string used in `bs-configurations' for naming a configuration." 292 :group 'bs 293 :type 'string) 294 295(defcustom bs-alternative-configuration "all" 296 "*Name of configuration used when calling `bs-show' with \ 297\\[universal-argument] as prefix key. 298Must be a string used in `bs-configurations' for naming a configuration." 299 :group 'bs 300 :type 'string) 301 302(defvar bs-current-configuration bs-default-configuration 303 "Name of current configuration. 304Must be a string used in `bs-configurations' for naming a configuration.") 305 306(defcustom bs-cycle-configuration-name nil 307 "*Name of configuration used when cycling through the buffer list. 308A value of nil means to use current configuration `bs-default-configuration'. 309Must be a string used in `bs-configurations' for naming a configuration." 310 :group 'bs 311 :type '(choice (const :tag "like current configuration" nil) 312 string)) 313 314(defcustom bs-string-show-always "+" 315 "*String added in column 1 indicating a buffer will always be shown." 316 :group 'bs-appearance 317 :type 'string) 318 319(defcustom bs-string-show-never "-" 320 "*String added in column 1 indicating a buffer will never be shown." 321 :group 'bs-appearance 322 :type 'string) 323 324(defcustom bs-string-current "." 325 "*String added in column 1 indicating the current buffer." 326 :group 'bs-appearance 327 :type 'string) 328 329(defcustom bs-string-current-marked "#" 330 "*String added in column 1 indicating the current buffer when it is marked." 331 :group 'bs-appearance 332 :type 'string) 333 334(defcustom bs-string-marked ">" 335 "*String added in column 1 indicating a marked buffer." 336 :group 'bs-appearance 337 :type 'string) 338 339(defcustom bs-string-show-normally " " 340 "*String added in column 1 indicating a unmarked buffer." 341 :group 'bs-appearance 342 :type 'string) 343 344(defvar bs--name-entry-length 20 345 "Maximum length of all displayed buffer names. 346Used internally, only.") 347 348;; ---------------------------------------------------------------------- 349;; Internal globals 350;; ---------------------------------------------------------------------- 351 352(defvar bs-buffer-show-mark nil 353 "Flag for the current mode for showing this buffer. 354A value of nil means buffer will be shown depending on the current 355configuration. 356A value of `never' means to never show the buffer. 357A value of `always' means to show buffer regardless of the configuration.") 358 359(make-variable-buffer-local 'bs-buffer-show-mark) 360 361;; Make face named region (for XEmacs) 362(unless (facep 'region) 363 (make-face 'region) 364 (set-face-background 'region "gray75")) 365 366(defun bs--sort-by-name (b1 b2) 367 "Compare buffers B1 and B2 by buffer name." 368 (string< (buffer-name b1) 369 (buffer-name b2))) 370 371(defun bs--sort-by-filename (b1 b2) 372 "Compare buffers B1 and B2 by file name." 373 (string< (or (buffer-file-name b1) "") 374 (or (buffer-file-name b2) ""))) 375 376(defun bs--sort-by-mode (b1 b2) 377 "Compare buffers B1 and B2 by mode name." 378 (save-excursion 379 (string< (progn (set-buffer b1) (format "%s" mode-name)) 380 (progn (set-buffer b2) (format "%s" mode-name))))) 381 382(defun bs--sort-by-size (b1 b2) 383 "Compare buffers B1 and B2 by buffer size." 384 (save-excursion 385 (< (progn (set-buffer b1) (buffer-size)) 386 (progn (set-buffer b2) (buffer-size))))) 387 388(defcustom bs-sort-functions 389 '(("by name" bs--sort-by-name "Buffer" region) 390 ("by size" bs--sort-by-size "Size" region) 391 ("by mode" bs--sort-by-mode "Mode" region) 392 ("by filename" bs--sort-by-filename "File" region) 393 ("by nothing" nil nil nil)) 394 "*List of all possible sorting aspects for Buffer Selection Menu. 395You can add a new entry with a call to `bs-define-sort-function'. 396Each element is a list of four elements (NAME FUNCTION REGEXP-FOR-SORTING FACE) 397NAME specifies the sort order defined by function FUNCTION. 398FUNCTION nil means don't sort the buffer list. Otherwise the functions 399must have two parameters - the buffers to compare. 400REGEXP-FOR-SORTING is a regular expression which describes the 401column title to highlight. 402FACE is a face used to fontify the sorted column title. A value of nil means 403don't highlight." 404 :group 'bs 405 :type '(repeat sexp)) 406 407(defun bs-define-sort-function (name fun &optional regexp-for-sorting face) 408 "Define a new function for buffer sorting in Buffer Selection Menu. 409NAME specifies the sort order defined by function FUN. 410A value of nil for FUN means don't sort the buffer list. Otherwise the 411functions must have two parameters - the buffers to compare. 412REGEXP-FOR-SORTING is a regular expression which describes the 413column title to highlight. 414FACE is a face used to fontify the sorted column title. A value of nil means 415don't highlight. 416The new sort aspect will be inserted into list `bs-sort-functions'." 417 (let ((tupel (assoc name bs-sort-functions))) 418 (if tupel 419 (setcdr tupel (list fun regexp-for-sorting face)) 420 (setq bs-sort-functions 421 (cons (list name fun regexp-for-sorting face) 422 bs-sort-functions))))) 423 424(defvar bs--current-sort-function nil 425 "Description of the current function for sorting the buffer list. 426This is an element of `bs-sort-functions'.") 427 428(defcustom bs-default-sort-name "by nothing" 429 "*Name of default sort behavior. 430Must be \"by nothing\" or a string used in `bs-sort-functions' for 431naming a sort behavior. Default is \"by nothing\" which means no sorting." 432 :group 'bs 433 :type 'string 434 :set (lambda (var-name value) 435 (set var-name value) 436 (setq bs--current-sort-function 437 (assoc value bs-sort-functions)))) 438 439(defvar bs--buffer-coming-from nil 440 "The buffer in which the user started the current Buffer Selection Menu.") 441 442(defvar bs--show-all nil 443 "Flag whether showing all buffers regardless of current configuration. 444Non-nil means to show all buffers. Otherwise show buffers 445defined by current configuration `bs-current-configuration'.") 446 447(defvar bs--window-config-coming-from nil 448 "Window configuration before starting Buffer Selection Menu.") 449(make-variable-frame-local 'bs--window-config-coming-from) 450 451(defvar bs--intern-show-never "^ \\|\\*buffer-selection\\*" 452 "Regular expression specifying which buffers never to show. 453A buffer whose name matches this regular expression will never be 454included in the buffer list.") 455 456(defvar bs-current-list nil 457 "List of buffers shown in Buffer Selection Menu. 458Used internally, only.") 459 460(defvar bs--marked-buffers nil 461 "Currently marked buffers in Buffer Selection Menu.") 462 463(defvar bs-mode-map 464 (let ((map (make-sparse-keymap))) 465 (define-key map " " 'bs-select) 466 (define-key map "f" 'bs-select) 467 (define-key map "v" 'bs-view) 468 (define-key map "!" 'bs-select-in-one-window) 469 (define-key map [mouse-2] 'bs-mouse-select) ;; for GNU EMACS 470 (define-key map [button2] 'bs-mouse-select) ;; for XEmacs 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'.") 517 518;; ---------------------------------------------------------------------- 519;; Functions 520;; ---------------------------------------------------------------------- 521 522(defun bs-buffer-list (&optional list sort-description) 523 "Return a list of buffers to be shown. 524LIST is a list of buffers to test for appearance in Buffer Selection Menu. 525The result list depends on the global variables `bs-dont-show-regexp', 526`bs-must-show-regexp', `bs-dont-show-function', `bs-must-show-function' 527and `bs-buffer-sort-function'. 528If SORT-DESCRIPTION isn't nil the list will be sorted by 529a 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)))) 578 579(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)) 584 585(defun bs--redisplay (&optional keep-line-p sort-description) 586 "Redisplay whole Buffer Selection Menu. 587If KEEP-LINE-P is non-nil the point will stay on current line. 588SORT-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))) 594 595(defun bs--goto-current-buffer () 596 "Goto line which represents the current buffer; 597actually 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) 601 "\\|^" 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)))) 610 611(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))) 617 618(defun bs-mode () 619 "Major mode for editing a subset of Emacs' buffers. 620\\<bs-mode-map> 621Aside from two header lines each line describes one buffer. 622Move to a line representing the buffer you want to edit and select 623buffer by \\[bs-select] or SPC. Abort buffer list with \\[bs-kill]. 624There are many key commands similar to `Buffer-menu-mode' for 625manipulating the buffer list and buffers. 626For faster navigation each digit key is a digit argument. 627 628\\[bs-select] or SPACE -- select current line's buffer and other marked buffers. 629\\[bs-toggle-show-all] -- toggle between all buffers and a special subset. 630\\[bs-select-other-window] -- select current line's buffer in other window. 631\\[bs-tmp-select-other-window] -- make another window display that buffer and 632 remain in Buffer Selection Menu. 633\\[bs-mouse-select] -- select current line's buffer and other marked buffers. 634\\[bs-save] -- save current line's buffer immediately. 635\\[bs-delete] -- kill current line's buffer immediately. 636\\[bs-toggle-readonly] -- toggle read-only status of current line's buffer. 637\\[bs-clear-modified] -- clear modified-flag on that buffer. 638\\[bs-mark-current] -- mark current line's buffer to be displayed. 639\\[bs-unmark-current] -- unmark current line's buffer to be displayed. 640\\[bs-show-sorted] -- display buffer list sorted by next sort aspect. 641\\[bs-set-configuration-and-refresh] -- ask user for a configuration and \ 642apply selected configuration. 643\\[bs-select-next-configuration] -- select and apply next \ 644available Buffer Selection Menu configuration. 645\\[bs-kill] -- leave Buffer Selection Menu without a selection. 646\\[bs-toggle-current-to-show] -- toggle status of appearance. 647\\[bs-set-current-buffer-to-show-always] -- mark current line's buffer \ 648to show always. 649\\[bs-visit-tags-table] -- call `visit-tags-table' on current line's buffer. 650\\[bs-help] -- display this help text." 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)) 664 665(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))) 670 671(defun bs-kill () 672 "Let buffer disappear and reset window-configuration." 673 (interactive) 674 (bury-buffer (current-buffer)) 675 (bs--restore-window-config)) 676 677(defun bs-abort () 678 "Ding and leave Buffer Selection Menu without a selection." 679 (interactive) 680 (ding) 681 (bs-kill)) 682 683(defun bs-set-configuration-and-refresh () 684 "Ask user for a configuration and apply selected configuration. 685Refresh 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--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))) 699 700(defun bs--current-buffer () 701 "Return buffer on current line. 702Raise 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))) 709 710(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))) 718 719(defun bs-view () 720 "View current line's buffer in View mode. 721Leave Buffer Selection Menu." 722 (interactive) 723 (view-buffer (bs--current-buffer))) 724 725(defun bs-select () 726 "Select current line's buffer and other marked buffers. 727If there are no marked buffers the window configuration before starting 728Buffer Selectin Menu will be restored. 729If there are marked buffers each marked buffer and the current line's buffer 730will be selected in a window. 731Leave 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))))) 750 751(defun bs-select-other-window () 752 "Select current line's buffer by `switch-to-buffer-other-window'. 753The window configuration before starting Buffer Selectin Menu will be restored 754unless there is no other window. In this case a new window will be created. 755Leave 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))) 761 762(defun bs-tmp-select-other-window () 763 "Make the other window select this line's buffer. 764The current window remains selected." 765 (interactive) 766 (let ((buffer (bs--current-buffer))) 767 (display-buffer buffer t))) 768 769(defun bs-select-other-frame () 770 "Select current line's buffer in new created frame. 771Leave 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))) 777 778(defun bs-mouse-select-other-frame (event) 779 "Select selected line's buffer in new created frame. 780Leave Buffer Selection Menu. 781EVENT: a mouse click EVENT." 782 (interactive "e") 783 (mouse-set-point event) 784 (bs-select-other-frame)) 785 786(defun bs-mouse-select (event) 787 "Select buffer on mouse click EVENT. 788Select buffer by `bs-select'." 789 (interactive "e") 790 (mouse-set-point event) 791 (bs-select)) 792 793(defun bs-select-in-one-window () 794 "Select current line's buffer in one window and delete other windows. 795Leave Buffer Selection Menu." 796 (interactive) 797 (bs-select) 798 (delete-other-windows)) 799 800(defun bs-bury-buffer () 801 "Bury buffer on current line." 802 (interactive) 803 (bury-buffer (bs--current-buffer)) 804 (bs--redisplay t)) 805 806(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))) 814 815(defun bs-visit-tags-table () 816 "Visit the tags table in the buffer on this line. 817See `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")))) 823 824(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))) 840 841(defun bs-set-current-buffer-to-show-always (&optional not-to-show-p) 842 "Toggle status of buffer on line to `always shown'. 843NOT-TO-SHOW-P: prefix argument. 844With no prefix argument the buffer on current line is marked to show 845always. 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))) 850 851(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)) 855 856(defun bs--set-toggle-to-show (buffer what) 857 "Set value `bs-buffer-show-mark' of buffer BUFFER to WHAT. 858Redisplay current line and display a message describing 859the 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)) 864 865(defun bs-mark-current (count) 866 "Mark buffers. 867COUNT is the number of buffers to mark. 868Move 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))))) 879 880(defun bs-unmark-current (count) 881 "Unmark buffers. 882COUNT is the number of buffers to unmark. 883Move 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))))) 894 895(defun bs--show-config-message (what) 896 "Show message indicating the new showing status WHAT. 897WHAT 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.")))) 903 904(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))) 922 923(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)))) 930 931(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))) 940 941(defun bs-apply-sort-faces (&optional sort-description) 942 "Set text properties for the sort described by SORT-DESCRIPTION. 943SORT-DESCRIPTION is an element of `bs-sort-functions'. 944Default 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))))))) 957 958(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))) 965 966(defun bs-toggle-readonly () 967 "Toggle read-only status for buffer on current line. 968Uses 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))) 975 976(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)) 984 985(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)))) 991 992(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))) 998 999(defun bs--up () 1000 "Move cursor vertically up one line. 1001If 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))) 1007 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))) 1014 1015(defun bs--down () 1016 "Move cursor vertically down one line. 1017If 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))) 1021 1022(defun bs-visits-non-file (buffer) 1023 "Return t or nil whether BUFFER visits no file. 1024A value of t means BUFFER belongs to no file. 1025A value of nil means BUFFER belongs to a file." 1026 (not (buffer-file-name buffer))) 1027 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." 1030 (string-match "^\\*" (buffer-name b2))) 1031 1032;; ---------------------------------------------------------------------- 1033;; Configurations: 1034;; ---------------------------------------------------------------------- 1035 1036(defun bs-config-clear () 1037 "*Reset all variables which specify a configuration. 1038These 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)) 1046 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)) 1054 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. 1063 bs-must-show-regexp "^\\*scratch\\*$")) 1064 1065(defun bs-config--all () 1066 "Define a configuration for showing all buffers. 1067Reset all according variables by `bs-config-clear'." 1068 (bs-config-clear)) 1069 1070(defun bs-config--all-intern-last () 1071 "Define a configuration for showing all buffers. 1072Internal 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)) 1076 1077(defun bs-set-configuration (name) 1078 "Set configuration to the one saved under string NAME in `bs-configurations'. 1079When called interactively ask user for a configuration and apply selected 1080configuration." 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)))) 1099 1100(defun bs-help () 1101 "Help for `bs-show'." 1102 (interactive) 1103 (describe-function 'bs-mode)) 1104 1105(defun bs-next-config-aux (start-name list) 1106 "Get the next assoc after START-NAME in list LIST. 1107Will 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)))) 1119 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)) 1123 1124(defun bs-select-next-configuration (&optional start-name) 1125 "Apply next configuration START-NAME and refresh buffer list. 1126If START-NAME is nil the current configuration `bs-current-configuration' 1127will 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)))) 1135 1136(defun bs-show-in-buffer (list) 1137 "Display buffer list LIST in buffer *buffer-selection*. 1138Select buffer *buffer-selection* and display buffers according to current 1139configuration `bs-current-configuration'. Set window height, fontify buffer 1140and 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)) 1157 (insert "\n") 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))) 1165 1166(defun bs-next-buffer (&optional buffer-list sorting-p) 1167 "Return next buffer and buffer list for buffer cycling in BUFFER-LIST. 1168Ignore sorting when SORTING-P is nil. 1169If BUFFER-LIST is nil the result of `bs-buffer-list' will be used as 1170buffer list. The result is a cons of normally the second element of 1171BUFFER-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))) 1179 1180(defun bs-previous-buffer (&optional buffer-list sorting-p) 1181 "Return previous buffer and buffer list for buffer cycling in BUFFER-LIST. 1182Ignore sorting when SORTING-P is nil. 1183If BUFFER-LIST is nil the result of `bs-buffer-list' will be used as 1184buffer list. The result is a cons of last element of BUFFER-LIST and the 1185buffer 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))) 1192 1193(defun bs-message-without-log (&rest args) 1194 "Like `message' but don't log it on the message log. 1195All arguments ARGS are transferred to function `message'." 1196 (let ((message-log-max nil)) 1197 (apply 'message args))) 1198 1199(defvar bs--cycle-list nil 1200 "Current buffer list used for cycling.") 1201 1202;;;###autoload 1203(defun bs-cycle-next () 1204 "Select next buffer defined by buffer cycling. 1205The buffers taking part in buffer cycling are defined 1206by 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 (setq bs--cycle-list (append (cdr cycle-list) 1225 (list (car cycle-list)))) 1226 (bury-buffer) 1227 (switch-to-buffer next) 1228 (bs-message-without-log "Next buffers: %s" 1229 (or (cdr bs--cycle-list) 1230 "this buffer")))))) 1231 1232;;;###autoload 1233(defun bs-cycle-previous () 1234 "Select previous buffer defined by buffer cycling. 1235The buffers taking part in buffer cycling are defined 1236by buffer configuration `bs-cycle-configuration-name'." 1237 (interactive) 1238 (let ((bs--buffer-coming-from (current-buffer)) 1239 (bs-dont-show-regexp bs-dont-show-regexp) 1240 (bs-must-show-regexp bs-must-show-regexp) 1241 (bs-dont-show-function bs-dont-show-function) 1242 (bs-must-show-function bs-must-show-function) 1243 (bs--show-all nil)) 1244 (bs-set-configuration (or bs-cycle-configuration-name bs-default-configuration)) 1245 (let ((bs-buffer-sort-function nil) 1246 (bs--current-sort-function nil)) 1247 (let* ((tupel (bs-previous-buffer (if (or (eq last-command 1248 'bs-cycle-next) 1249 (eq last-command 1250 'bs-cycle-previous)) 1251 bs--cycle-list))) 1252 (prev-buffer (car tupel)) 1253 (cycle-list (cdr tupel))) 1254 (setq bs--cycle-list (append (last cycle-list) 1255 (reverse (cdr (reverse cycle-list))))) 1256 (switch-to-buffer prev-buffer) 1257 (bs-message-without-log "Previous buffers: %s" 1258 (or (reverse (cdr bs--cycle-list)) 1259 "this buffer")))))) 1260 1261(defun bs--get-value (fun &optional args) 1262 "Apply function FUN with arguments ARGS. 1263Return result of evaluation. Will return FUN if FUN is a number 1264or a string." 1265 (cond ((numberp fun) 1266 fun) 1267 ((stringp fun) 1268 fun) 1269 (t (apply fun args)))) 1270 1271(defun bs--get-marked-string (start-buffer all-buffers) 1272 "Return a string which describes whether current buffer is marked. 1273START-BUFFER is the buffer where we started buffer selection. 1274ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu. 1275The result string is one of `bs-string-current', `bs-string-current-marked', 1276`bs-string-marked', `bs-string-show-normally', `bs-string-show-never', or 1277`bs-string-show-always'." 1278 (cond ;; current buffer is the buffer we started buffer selection. 1279 ((eq (current-buffer) start-buffer) 1280 (if (memq (current-buffer) bs--marked-buffers) 1281 bs-string-current-marked ; buffer is marked 1282 bs-string-current)) 1283 ;; current buffer is marked 1284 ((memq (current-buffer) bs--marked-buffers) 1285 bs-string-marked) 1286 ;; current buffer hasn't a special mark. 1287 ((null bs-buffer-show-mark) 1288 bs-string-show-normally) 1289 ;; current buffer has a mark not to show itself. 1290 ((eq bs-buffer-show-mark 'never) 1291 bs-string-show-never) 1292 ;; otherwise current buffer is marked to show always. 1293 (t 1294 bs-string-show-always))) 1295 1296(defun bs--get-modified-string (start-buffer all-buffers) 1297 "Return a string which describes whether current buffer is modified. 1298START-BUFFER is the buffer where we started buffer selection. 1299ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu." 1300 (if (buffer-modified-p) "*" " ")) 1301 1302(defun bs--get-readonly-string (start-buffer all-buffers) 1303 "Return a string which describes whether current buffer is read only. 1304START-BUFFER is the buffer where we started buffer selection. 1305ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu." 1306 (if buffer-read-only "%" " ")) 1307 1308(defun bs--get-size-string (start-buffer all-buffers) 1309 "Return a string which describes the size of current buffer. 1310START-BUFFER is the buffer where we started buffer selection. 1311ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu." 1312 (int-to-string (buffer-size))) 1313 1314(defun bs--get-name (start-buffer all-buffers) 1315 "Return name of current buffer for Buffer Selection Menu. 1316The name of current buffer gets additional text properties 1317for mouse highlighting. 1318START-BUFFER is the buffer where we started buffer selection. 1319ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu." 1320 (propertize (buffer-name) 1321 'help-echo "mouse-2: select this buffer, mouse-3: select in other frame" 1322 'mouse-face 'highlight)) 1323 1324(defun bs--get-mode-name (start-buffer all-buffers) 1325 "Return the name of mode of current buffer for Buffer Selection Menu. 1326START-BUFFER is the buffer where we started buffer selection. 1327ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu." 1328 mode-name) 1329 1330(defun bs--get-file-name (start-buffer all-buffers) 1331 "Return string for column 'File' in Buffer Selection Menu. 1332This is the variable `buffer-file-name' of current buffer. 1333If current mode is `dired-mode' or `shell-mode' it returns the 1334default directory. 1335START-BUFFER is the buffer where we started buffer selection. 1336ALL-BUFFERS is the list of buffer appearing in Buffer Selection Menu." 1337 (propertize (if (member major-mode '(shell-mode dired-mode)) 1338 default-directory 1339 (or buffer-file-name "")) 1340 'mouse-face 'highlight 1341 'help-echo "mouse-2: select this buffer, mouse-3: select in other frame")) 1342 1343(defun bs--insert-one-entry (buffer) 1344 "Generate one entry for buffer BUFFER in Buffer Selection Menu. 1345It goes over all columns described in `bs-attributes-list' 1346and evaluates corresponding string. Inserts string in current buffer; 1347normally *buffer-selection*." 1348 (let ((string "") 1349 (columns bs-attributes-list) 1350 (to-much 0) 1351 (apply-args (append (list bs--buffer-coming-from bs-current-list)))) 1352 (save-excursion 1353 (while columns 1354 (set-buffer buffer) 1355 (let ((min (bs--get-value (nth 1 (car columns)))) 1356 ;;(max (bs--get-value (nth 2 (car columns)))) refered no more 1357 (align (nth 3 (car columns))) 1358 (fun (nth 4 (car columns))) 1359 (val nil) 1360 new-string) 1361 (setq val (bs--get-value fun apply-args)) 1362 (setq new-string (bs--format-aux val align (- min to-much))) 1363 (setq string (concat string new-string)) 1364 (if (> (length new-string) min) 1365 (setq to-much (- (length new-string) min))) 1366 ) ; let 1367 (setq columns (cdr columns)))) 1368 (insert string) 1369 string)) 1370 1371(defun bs--format-aux (string align len) 1372 "Generate a string with STRING with alignment ALIGN and length LEN. 1373ALIGN is one of the symbols `left', `middle', or `right'." 1374 (let* ((width (length string)) 1375 (len (max len width))) 1376 (format (format "%%%s%ds" (if (eq align 'right) "" "-") len) 1377 (if (eq align 'middle) 1378 (concat (make-string (/ (- len width) 2) ?\s) string) 1379 string)))) 1380 1381(defun bs--show-header () 1382 "Insert header for Buffer Selection Menu in current buffer." 1383 (mapcar '(lambda (string) 1384 (insert string "\n")) 1385 (bs--create-header))) 1386 1387(defun bs--get-name-length () 1388 "Return value of `bs--name-entry-length'." 1389 bs--name-entry-length) 1390 1391(defun bs--create-header () 1392 "Return all header lines used in Buffer Selection Menu as a list of strings." 1393 (list (mapconcat (lambda (column) 1394 (bs--format-aux (bs--get-value (car column)) 1395 (nth 3 column) ; align 1396 (bs--get-value (nth 1 column)))) 1397 bs-attributes-list 1398 "") 1399 (mapconcat (lambda (column) 1400 (let ((length (length (bs--get-value (car column))))) 1401 (bs--format-aux (make-string length ?-) 1402 (nth 3 column) ; align 1403 (bs--get-value (nth 1 column))))) 1404 bs-attributes-list 1405 ""))) 1406 1407(defun bs--show-with-configuration (name &optional arg) 1408 "Display buffer list of configuration with name NAME. 1409Set configuration NAME and determine window for Buffer Selection Menu. 1410Unless current buffer is buffer *buffer-selection* we have to save 1411the buffer we started Buffer Selection Menu and the current window 1412configuration to restore buffer and window configuration after a 1413selection. If there is already a window displaying *buffer-selection* 1414select this window for Buffer Selection Menu. Otherwise open a new 1415window. 1416The optional argument ARG is the prefix argument when calling a function 1417for buffer selection." 1418 (bs-set-configuration name) 1419 (let ((bs--show-all (or bs--show-all arg))) 1420 (unless (string= "*buffer-selection*" (buffer-name)) 1421 ;; Only when not in buffer *buffer-selection* 1422 ;; we have to set the buffer we started the command 1423 (setq bs--buffer-coming-from (current-buffer))) 1424 (let ((liste (bs-buffer-list)) 1425 (active-window (get-window-with-predicate 1426 (lambda (w) 1427 (string= (buffer-name (window-buffer w)) 1428 "*buffer-selection*"))))) 1429 (if active-window 1430 (select-window active-window) 1431 (modify-frame-parameters nil 1432 (list (cons 'bs--window-config-coming-from 1433 (current-window-configuration)))) 1434 (when (> (window-height (selected-window)) 7) 1435 (split-window-vertically) 1436 (other-window 1))) 1437 (bs-show-in-buffer liste) 1438 (bs-message-without-log "%s" (bs--current-config-message))))) 1439 1440(defun bs--configuration-name-for-prefix-arg (prefix-arg) 1441 "Convert prefix argument PREFIX-ARG to a name of a buffer configuration. 1442If PREFIX-ARG is nil return `bs-default-configuration'. 1443If PREFIX-ARG is an integer return PREFIX-ARG element of `bs-configurations'. 1444Otherwise return `bs-alternative-configuration'." 1445 (cond ;; usually activation 1446 ((null prefix-arg) 1447 bs-default-configuration) 1448 ;; call with integer as prefix argument 1449 ((integerp prefix-arg) 1450 (if (and (< 0 prefix-arg) (<= prefix-arg (length bs-configurations))) 1451 (car (nth (1- prefix-arg) bs-configurations)) 1452 bs-default-configuration)) 1453 ;; call by prefix argument C-u 1454 (t bs-alternative-configuration))) 1455 1456;; ---------------------------------------------------------------------- 1457;; Main function bs-customize and bs-show 1458;; ---------------------------------------------------------------------- 1459 1460;;;###autoload 1461(defun bs-customize () 1462 "Customization of group bs for Buffer Selection Menu." 1463 (interactive) 1464 (customize-group "bs")) 1465 1466;;;###autoload 1467(defun bs-show (arg) 1468 "Make a menu of buffers so you can manipulate buffers or the buffer list. 1469\\<bs-mode-map> 1470There are many key commands similar to `Buffer-menu-mode' for 1471manipulating buffer list and buffers itself. 1472User can move with [up] or [down], select a buffer 1473by \\[bs-select] or [SPC]\n 1474Type \\[bs-kill] to leave Buffer Selection Menu without a selection. 1475Type \\[bs-help] after invocation to get help on commands available. 1476With prefix argument ARG show a different buffer list. Function 1477`bs--configuration-name-for-prefix-arg' determine accordingly 1478name of buffer configuration." 1479 (interactive "P") 1480 (setq bs--marked-buffers nil) 1481 (bs--show-with-configuration (bs--configuration-name-for-prefix-arg arg))) 1482 1483;; Now provide feature bs 1484(provide 'bs) 1485 1486;;; arch-tag: c0d9ab34-bf06-4368-ae9d-af88878e6802 1487;;; bs.el ends here 1488