buff-menu.el 9.6 KB

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  1. ;; Buffer menu main function and support functions.
  2. ;; Copyright (C) 1985, 1986, 1987 Free Software Foundation, Inc.
  3. ;; This file is part of GNU Emacs.
  4. ;; GNU Emacs is distributed in the hope that it will be useful,
  5. ;; but WITHOUT ANY WARRANTY. No author or distributor
  6. ;; accepts responsibility to anyone for the consequences of using it
  7. ;; or for whether it serves any particular purpose or works at all,
  8. ;; unless he says so in writing. Refer to the GNU Emacs General Public
  9. ;; License for full details.
  10. ;; Everyone is granted permission to copy, modify and redistribute
  11. ;; GNU Emacs, but only under the conditions described in the
  12. ;; GNU Emacs General Public License. A copy of this license is
  13. ;; supposed to have been given to you along with GNU Emacs so you
  14. ;; can know your rights and responsibilities. It should be in a
  15. ;; file named COPYING. Among other things, the copyright notice
  16. ;; and this notice must be preserved on all copies.
  17. ; Put buffer *Buffer List* into proper mode right away
  18. ; so that from now on even list-buffers is enough to get a buffer menu.
  19. (defvar Buffer-menu-mode-map nil "")
  20. (if Buffer-menu-mode-map
  21. ()
  22. (setq Buffer-menu-mode-map (make-keymap))
  23. (suppress-keymap Buffer-menu-mode-map t)
  24. (define-key Buffer-menu-mode-map "q" 'Buffer-menu-select)
  25. (define-key Buffer-menu-mode-map "2" 'Buffer-menu-2-window)
  26. (define-key Buffer-menu-mode-map "1" 'Buffer-menu-1-window)
  27. (define-key Buffer-menu-mode-map "f" 'Buffer-menu-this-window)
  28. (define-key Buffer-menu-mode-map "o" 'Buffer-menu-other-window)
  29. (define-key Buffer-menu-mode-map "s" 'Buffer-menu-save)
  30. (define-key Buffer-menu-mode-map "d" 'Buffer-menu-delete)
  31. (define-key Buffer-menu-mode-map "k" 'Buffer-menu-delete)
  32. (define-key Buffer-menu-mode-map "\C-d" 'Buffer-menu-delete-backwards)
  33. (define-key Buffer-menu-mode-map "\C-k" 'Buffer-menu-delete)
  34. (define-key Buffer-menu-mode-map "x" 'Buffer-menu-execute)
  35. (define-key Buffer-menu-mode-map " " 'next-line)
  36. (define-key Buffer-menu-mode-map "\177" 'Buffer-menu-backup-unmark)
  37. (define-key Buffer-menu-mode-map "~" 'Buffer-menu-not-modified)
  38. (define-key Buffer-menu-mode-map "?" 'describe-mode)
  39. (define-key Buffer-menu-mode-map "u" 'Buffer-menu-unmark)
  40. (define-key Buffer-menu-mode-map "m" 'Buffer-menu-mark))
  41. ;; Buffer Menu mode is suitable only for specially formatted data.
  42. (put 'buffer-menu-mode 'mode-class 'special)
  43. (defun Buffer-menu-mode ()
  44. "Major mode for editing a list of buffers.
  45. Each line describes one of the buffers in Emacs.
  46. Letters do not insert themselves; instead, they are commands.
  47. m -- mark buffer to be displayed.
  48. q -- select buffer of line point is on.
  49. Also show buffers marked with m in other windows.
  50. 1 -- select that buffer in full-screen window.
  51. 2 -- select that buffer in one window,
  52. together with buffer selected before this one in another window.
  53. f -- select that buffer in place of the buffer menu buffer.
  54. o -- select that buffer in another window,
  55. so the buffer menu buffer remains visible in its window.
  56. ~ -- clear modified-flag on that buffer.
  57. s -- mark that buffer to be saved, and move down.
  58. d or k -- mark that buffer to be deleted, and move down.
  59. C-d -- mark that buffer to be deleted, and move up.
  60. x -- delete or save marked buffers.
  61. u -- remove all kinds of marks from current line.
  62. Delete -- back up a line and remove marks.
  63. Precisely,\\{Buffer-menu-mode-map}"
  64. (kill-all-local-variables)
  65. (use-local-map Buffer-menu-mode-map)
  66. (setq truncate-lines t)
  67. (setq buffer-read-only t)
  68. (setq major-mode 'Buffer-menu-mode)
  69. (setq mode-name "Buffer Menu"))
  70. (defvar Buffer-menu-buffer-column nil)
  71. (defvar Buffer-menu-size-column nil)
  72. (defun Buffer-menu-buffer (error-if-non-existent-p)
  73. "Return buffer described by this line of buffer menu."
  74. (if (null Buffer-menu-buffer-column)
  75. (save-excursion
  76. (goto-char (point-min))
  77. (search-forward "Buffer")
  78. (backward-word 1)
  79. (setq Buffer-menu-buffer-column (current-column))
  80. (search-forward "Size")
  81. (backward-word 1)
  82. (setq Buffer-menu-size-column (current-column))))
  83. (save-excursion
  84. (beginning-of-line)
  85. (forward-char Buffer-menu-buffer-column)
  86. (let ((start (point))
  87. string)
  88. ;; End of buffer name marked by tab or two spaces.
  89. (re-search-forward "\t\\| ")
  90. (skip-chars-backward " \t")
  91. (setq string (buffer-substring start (point)))
  92. (or (get-buffer string)
  93. (if error-if-non-existent-p
  94. (error "No buffer named \"%s\"" string)
  95. nil)))))
  96. (defun buffer-menu (arg)
  97. "Make a menu of buffers so you can save, delete or select them.
  98. With argument, show only buffers that are visiting files.
  99. Type ? after invocation to get help on commands available.
  100. Type q immediately to make the buffer menu go away."
  101. (interactive "P")
  102. (list-buffers arg)
  103. (pop-to-buffer "*Buffer List*")
  104. (forward-line 2)
  105. (message
  106. "Commands: d, s, x; 1, 2, m, u, q; delete; ~; ? for help."))
  107. (defun Buffer-menu-mark ()
  108. "Mark buffer on this line for being displayed by \\[Buffer-menu-select] command."
  109. (interactive)
  110. (beginning-of-line)
  111. (if (looking-at " [-M]")
  112. (ding)
  113. (let ((buffer-read-only nil))
  114. (delete-char 1)
  115. (insert ?>)
  116. (forward-line 1))))
  117. (defun Buffer-menu-unmark ()
  118. "Cancel all requested operations on buffer on this line."
  119. (interactive)
  120. (beginning-of-line)
  121. (if (looking-at " [-M]")
  122. (ding)
  123. (let* ((buf (Buffer-menu-buffer t))
  124. (mod (buffer-modified-p buf))
  125. (readonly (save-excursion (set-buffer buf) buffer-read-only))
  126. (buffer-read-only nil))
  127. (delete-char 3)
  128. (insert (if readonly (if mod " *%" " %") (if mod " * " " ")))))
  129. (forward-line 1))
  130. (defun Buffer-menu-backup-unmark ()
  131. "Move up and cancel all requested operations on buffer on line above."
  132. (interactive)
  133. (forward-line -1)
  134. (Buffer-menu-unmark)
  135. (forward-line -1))
  136. (defun Buffer-menu-delete ()
  137. "Mark buffer on this line to be deleted by \\[Buffer-menu-execute] command."
  138. (interactive)
  139. (beginning-of-line)
  140. (if (looking-at " [-M]") ;header lines
  141. (ding)
  142. (let ((buffer-read-only nil))
  143. (delete-char 1)
  144. (insert ?D)
  145. (forward-line 1))))
  146. (defun Buffer-menu-delete-backwards ()
  147. "Mark buffer on this line to be deleted by \\[Buffer-menu-execute] command
  148. and then move up one line"
  149. (interactive)
  150. (Buffer-menu-delete)
  151. (forward-line -2)
  152. (if (looking-at " [-M]") (forward-line 1)))
  153. (defun Buffer-menu-save ()
  154. "Mark buffer on this line to be saved by \\[Buffer-menu-execute] command."
  155. (interactive)
  156. (beginning-of-line)
  157. (forward-char 1)
  158. (if (looking-at " [-M]") ;header lines
  159. (ding)
  160. (let ((buffer-read-only nil))
  161. (delete-char 1)
  162. (insert ?S)
  163. (forward-line 1))))
  164. (defun Buffer-menu-not-modified ()
  165. "Mark buffer on this line as unmodified (no changes to save)."
  166. (interactive)
  167. (save-excursion
  168. (set-buffer (Buffer-menu-buffer t))
  169. (set-buffer-modified-p nil))
  170. (save-excursion
  171. (beginning-of-line)
  172. (forward-char 1)
  173. (if (looking-at "\\*")
  174. (let ((buffer-read-only nil))
  175. (delete-char 1)
  176. (insert ? )))))
  177. (defun Buffer-menu-execute ()
  178. "Save and/or delete buffers marked with \\[Buffer-menu-save] or \\[Buffer-menu-delete] commands."
  179. (interactive)
  180. (save-excursion
  181. (goto-char (point-min))
  182. (forward-line 1)
  183. (while (re-search-forward "^.S" nil t)
  184. (let ((modp nil))
  185. (save-excursion
  186. (set-buffer (Buffer-menu-buffer t))
  187. (save-buffer)
  188. (setq modp (buffer-modified-p)))
  189. (let ((buffer-read-only nil))
  190. (delete-char -1)
  191. (insert (if modp ?* ? ))))))
  192. (save-excursion
  193. (goto-char (point-min))
  194. (forward-line 1)
  195. (let ((buff-menu-buffer (current-buffer))
  196. (buffer-read-only nil))
  197. (while (search-forward "\nD" nil t)
  198. (forward-char -1)
  199. (let ((buf (Buffer-menu-buffer nil)))
  200. (or (eq buf nil)
  201. (eq buf buff-menu-buffer)
  202. (save-excursion (kill-buffer buf))))
  203. (if (Buffer-menu-buffer nil)
  204. (progn (delete-char 1)
  205. (insert ? ))
  206. (delete-region (point) (progn (forward-line 1) (point)))
  207. (forward-char -1))))))
  208. (defun Buffer-menu-select ()
  209. "Select this line's buffer; also display buffers marked with \">\".
  210. You can mark buffers with the \\[Buffer-menu-mark] command."
  211. (interactive)
  212. (let ((buff (Buffer-menu-buffer t))
  213. (menu (current-buffer))
  214. (others ())
  215. tem)
  216. (goto-char (point-min))
  217. (while (search-forward "\n>" nil t)
  218. (setq tem (Buffer-menu-buffer t))
  219. (let ((buffer-read-only nil))
  220. (delete-char -1)
  221. (insert ?\ ))
  222. (or (eq tem buff) (memq tem others) (setq others (cons tem others))))
  223. (setq others (nreverse others)
  224. tem (/ (1- (screen-height)) (1+ (length others))))
  225. (delete-other-windows)
  226. (switch-to-buffer buff)
  227. (or (eq menu buff)
  228. (bury-buffer menu))
  229. (while others
  230. (split-window nil tem)
  231. (other-window 1)
  232. (switch-to-buffer (car others))
  233. (setq others (cdr others)))
  234. (other-window 1))) ;back to the beginning!
  235. (defun Buffer-menu-1-window ()
  236. "Select this line's buffer, alone, in full screen."
  237. (interactive)
  238. (switch-to-buffer (Buffer-menu-buffer t))
  239. (bury-buffer (other-buffer))
  240. (delete-other-windows))
  241. (defun Buffer-menu-this-window ()
  242. "Select this line's buffer in this window."
  243. (interactive)
  244. (switch-to-buffer (Buffer-menu-buffer t)))
  245. (defun Buffer-menu-other-window ()
  246. "Select this line's buffer in other window, leaving buffer menu visible."
  247. (interactive)
  248. (switch-to-buffer-other-window (Buffer-menu-buffer t)))
  249. (defun Buffer-menu-2-window ()
  250. "Select this line's buffer, with previous buffer in second window."
  251. (interactive)
  252. (let ((buff (Buffer-menu-buffer t))
  253. (menu (current-buffer))
  254. (pop-up-windows t))
  255. (switch-to-buffer (other-buffer))
  256. (pop-to-buffer buff)
  257. (bury-buffer menu)))