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author | Jim Blandy <jimb@redhat.com> | 1991-02-23 18:14:25 +0000 |
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committer | Jim Blandy <jimb@redhat.com> | 1991-02-23 18:14:25 +0000 |
commit | 2cc1d71c3e9fbb9b3fcaa8d9d91cd6d7731538ea (patch) | |
tree | fb698d777592a64a9c5a1caaa3d0e84f8c5da9ce | |
parent | aaefc6634ebbbb0143c4461fe725d356a6576c44 (diff) | |
download | emacs-2cc1d71c3e9fbb9b3fcaa8d9d91cd6d7731538ea.tar.gz |
Initial revision
-rw-r--r-- | lisp/buff-menu.el | 284 |
1 files changed, 284 insertions, 0 deletions
diff --git a/lisp/buff-menu.el b/lisp/buff-menu.el new file mode 100644 index 00000000000..77923774da7 --- /dev/null +++ b/lisp/buff-menu.el @@ -0,0 +1,284 @@ +;; Buffer menu main function and support functions. +;; Copyright (C) 1985, 1986, 1987 Free Software Foundation, Inc. + +;; This file is part of GNU Emacs. + +;; GNU Emacs is free software; you can redistribute it and/or modify +;; it under the terms of the GNU General Public License as published by +;; the Free Software Foundation; either version 1, or (at your option) +;; any later version. + +;; GNU Emacs is distributed in the hope that it will be useful, +;; but WITHOUT ANY WARRANTY; without even the implied warranty of +;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +;; GNU General Public License for more details. + +;; You should have received a copy of the GNU General Public License +;; along with GNU Emacs; see the file COPYING. If not, write to +;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + + +; Put buffer *Buffer List* into proper mode right away +; so that from now on even list-buffers is enough to get a buffer menu. + +(defvar Buffer-menu-mode-map nil "") + +(if Buffer-menu-mode-map + () + (setq Buffer-menu-mode-map (make-keymap)) + (suppress-keymap Buffer-menu-mode-map t) + (define-key Buffer-menu-mode-map "q" 'Buffer-menu-select) + (define-key Buffer-menu-mode-map "2" 'Buffer-menu-2-window) + (define-key Buffer-menu-mode-map "1" 'Buffer-menu-1-window) + (define-key Buffer-menu-mode-map "f" 'Buffer-menu-this-window) + (define-key Buffer-menu-mode-map "o" 'Buffer-menu-other-window) + (define-key Buffer-menu-mode-map "s" 'Buffer-menu-save) + (define-key Buffer-menu-mode-map "d" 'Buffer-menu-delete) + (define-key Buffer-menu-mode-map "k" 'Buffer-menu-delete) + (define-key Buffer-menu-mode-map "\C-d" 'Buffer-menu-delete-backwards) + (define-key Buffer-menu-mode-map "\C-k" 'Buffer-menu-delete) + (define-key Buffer-menu-mode-map "x" 'Buffer-menu-execute) + (define-key Buffer-menu-mode-map " " 'next-line) + (define-key Buffer-menu-mode-map "n" 'next-line) + (define-key Buffer-menu-mode-map "p" 'previous-line) + (define-key Buffer-menu-mode-map "\177" 'Buffer-menu-backup-unmark) + (define-key Buffer-menu-mode-map "~" 'Buffer-menu-not-modified) + (define-key Buffer-menu-mode-map "?" 'describe-mode) + (define-key Buffer-menu-mode-map "u" 'Buffer-menu-unmark) + (define-key Buffer-menu-mode-map "m" 'Buffer-menu-mark) + (define-key Buffer-menu-mode-map "t" 'Buffer-menu-visit-tags-table)) + +;; Buffer Menu mode is suitable only for specially formatted data. +(put 'Buffer-menu-mode 'mode-class 'special) + +(defun Buffer-menu-mode () + "Major mode for editing a list of buffers. +Each line describes one of the buffers in Emacs. +Letters do not insert themselves; instead, they are commands. +\\<Buffer-menu-mode-map> +\\[Buffer-menu-mark] -- mark buffer to be displayed. +\\[Buffer-menu-select] -- select buffer of line point is on. + Also show buffers marked with m in other windows. +\\[Buffer-menu-1-window] -- select that buffer in full-screen window. +\\[Buffer-menu-2-window] -- select that buffer in one window, + together with buffer selected before this one in another window. +\\[Buffer-menu-this-window] -- select that buffer in place of the buffer menu buffer. +\\[Buffer-menu-other-window] -- select that buffer in another window, + so the buffer menu buffer remains visible in its window. +\\[Buffer-menu-visit-tags-table] -- visit-tags-table this buffer. +\\[Buffer-menu-not-modified] -- clear modified-flag on that buffer. +\\[Buffer-menu-save] -- mark that buffer to be saved, and move down. +\\[Buffer-menu-delete] -- mark that buffer to be deleted, and move down. +\\[Buffer-menu-delete-backwards] -- mark that buffer to be deleted, and move up. +\\[Buffer-menu-execute] -- delete or save marked buffers. +\\[Buffer-menu-unmark] -- remove all kinds of marks from current line. +\\[Buffer-menu-backup-unmark] -- back up a line and remove marks." + (kill-all-local-variables) + (use-local-map Buffer-menu-mode-map) + (setq truncate-lines t) + (setq buffer-read-only t) + (setq major-mode 'Buffer-menu-mode) + (setq mode-name "Buffer Menu") + (run-hooks 'buffer-menu-mode-hook)) + +(defvar Buffer-menu-buffer-column 4) + +(defun Buffer-menu-buffer (error-if-non-existent-p) + "Return buffer described by this line of buffer menu." + (save-excursion + (beginning-of-line) + (forward-char Buffer-menu-buffer-column) + (let ((start (point)) + string) + ;; End of buffer name marked by tab or two spaces. + (re-search-forward "\t\\| ") + (skip-chars-backward " \t") + (setq string (buffer-substring start (point))) + (or (get-buffer string) + (if error-if-non-existent-p + (error "No buffer named \"%s\"" string) + nil))))) + +(defun buffer-menu (arg) + "Make a menu of buffers so you can save, delete or select them. +With argument, show only buffers that are visiting files. +Type ? after invocation to get help on commands available. +Type q immediately to make the buffer menu go away." + (interactive "P") + (list-buffers arg) + (pop-to-buffer "*Buffer List*") + (forward-line 2) + (message + "Commands: d, s, x; 1, 2, m, u, q; delete; ~; ? for help.")) + +(defun Buffer-menu-mark () + "Mark buffer on this line for being displayed by \\<Buffer-menu-mode-map>\\[Buffer-menu-select] command." + (interactive) + (beginning-of-line) + (if (looking-at " [-M]") + (ding) + (let ((buffer-read-only nil)) + (delete-char 1) + (insert ?>) + (forward-line 1)))) + +(defun Buffer-menu-unmark () + "Cancel all requested operations on buffer on this line." + (interactive) + (beginning-of-line) + (if (looking-at " [-M]") + (ding) + (let* ((buf (Buffer-menu-buffer t)) + (mod (buffer-modified-p buf)) + (readonly (save-excursion (set-buffer buf) buffer-read-only)) + (buffer-read-only nil)) + (delete-char 3) + (insert (if readonly (if mod " *%" " %") (if mod " * " " "))))) + (forward-line 1)) + +(defun Buffer-menu-backup-unmark () + "Move up and cancel all requested operations on buffer on line above." + (interactive) + (forward-line -1) + (Buffer-menu-unmark) + (forward-line -1)) + +(defun Buffer-menu-delete () + "Mark buffer on this line to be deleted by \\<Buffer-menu-mode-map>\\[Buffer-menu-execute] command." + (interactive) + (beginning-of-line) + (if (looking-at " [-M]") ;header lines + (ding) + (let ((buffer-read-only nil)) + (delete-char 1) + (insert ?D) + (forward-line 1)))) + +(defun Buffer-menu-delete-backwards () + "Mark buffer on this line to be deleted by \\<Buffer-menu-mode-map>\\[Buffer-menu-execute] command +and then move up one line" + (interactive) + (Buffer-menu-delete) + (forward-line -2) + (if (looking-at " [-M]") (forward-line 1))) + +(defun Buffer-menu-save () + "Mark buffer on this line to be saved by \\<Buffer-menu-mode-map>\\[Buffer-menu-execute] command." + (interactive) + (beginning-of-line) + (forward-char 1) + (if (looking-at " [-M]") ;header lines + (ding) + (let ((buffer-read-only nil)) + (delete-char 1) + (insert ?S) + (forward-line 1)))) + +(defun Buffer-menu-not-modified () + "Mark buffer on this line as unmodified (no changes to save)." + (interactive) + (save-excursion + (set-buffer (Buffer-menu-buffer t)) + (set-buffer-modified-p nil)) + (save-excursion + (beginning-of-line) + (forward-char 1) + (if (looking-at "\\*") + (let ((buffer-read-only nil)) + (delete-char 1) + (insert ? ))))) + +(defun Buffer-menu-execute () + "Save and/or delete buffers marked with \\<Buffer-menu-mode-map>\\[Buffer-menu-save] or \\<Buffer-menu-mode-map>\\[Buffer-menu-delete] commands." + (interactive) + (save-excursion + (goto-char (point-min)) + (forward-line 1) + (while (re-search-forward "^.S" nil t) + (let ((modp nil)) + (save-excursion + (set-buffer (Buffer-menu-buffer t)) + (save-buffer) + (setq modp (buffer-modified-p))) + (let ((buffer-read-only nil)) + (delete-char -1) + (insert (if modp ?* ? )))))) + (save-excursion + (goto-char (point-min)) + (forward-line 1) + (let ((buff-menu-buffer (current-buffer)) + (buffer-read-only nil)) + (while (search-forward "\nD" nil t) + (forward-char -1) + (let ((buf (Buffer-menu-buffer nil))) + (or (eq buf nil) + (eq buf buff-menu-buffer) + (save-excursion (kill-buffer buf)))) + (if (Buffer-menu-buffer nil) + (progn (delete-char 1) + (insert ? )) + (delete-region (point) (progn (forward-line 1) (point))) + (forward-char -1)))))) + +(defun Buffer-menu-select () + "Select this line's buffer; also display buffers marked with `>'. +You can mark buffers with the \\<Buffer-menu-mode-map>\\[Buffer-menu-mark] command." + (interactive) + (let ((buff (Buffer-menu-buffer t)) + (menu (current-buffer)) + (others ()) + tem) + (goto-char (point-min)) + (while (search-forward "\n>" nil t) + (setq tem (Buffer-menu-buffer t)) + (let ((buffer-read-only nil)) + (delete-char -1) + (insert ?\ )) + (or (eq tem buff) (memq tem others) (setq others (cons tem others)))) + (setq others (nreverse others) + tem (/ (1- (screen-height)) (1+ (length others)))) + (delete-other-windows) + (switch-to-buffer buff) + (or (eq menu buff) + (bury-buffer menu)) + (while others + (split-window nil tem) + (other-window 1) + (switch-to-buffer (car others)) + (setq others (cdr others))) + (other-window 1))) ;back to the beginning! + +(defun Buffer-menu-visit-tags-table () + "Visit the tags table in the buffer on this line. See `visit-tags-table'." + (interactive) + (let ((file (buffer-file-name (Buffer-menu-buffer t)))) + (if file + (visit-tags-table file) + (error "Specified buffer has no file")))) + +(defun Buffer-menu-1-window () + "Select this line's buffer, alone, in full screen." + (interactive) + (switch-to-buffer (Buffer-menu-buffer t)) + (bury-buffer (other-buffer)) + (delete-other-windows)) + +(defun Buffer-menu-this-window () + "Select this line's buffer in this window." + (interactive) + (switch-to-buffer (Buffer-menu-buffer t))) + +(defun Buffer-menu-other-window () + "Select this line's buffer in other window, leaving buffer menu visible." + (interactive) + (switch-to-buffer-other-window (Buffer-menu-buffer t))) + +(defun Buffer-menu-2-window () + "Select this line's buffer, with previous buffer in second window." + (interactive) + (let ((buff (Buffer-menu-buffer t)) + (menu (current-buffer)) + (pop-up-windows t)) + (switch-to-buffer (other-buffer)) + (pop-to-buffer buff) + (bury-buffer menu))) |