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Diffstat (limited to 'lisp/ebuff-menu.el')
| -rw-r--r-- | lisp/ebuff-menu.el | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/lisp/ebuff-menu.el b/lisp/ebuff-menu.el new file mode 100644 index 00000000000..72de2dd8c4f --- /dev/null +++ b/lisp/ebuff-menu.el @@ -0,0 +1,244 @@ +; buggestions to mly@ai.ai.mit.edu + +;; who says one can't have typeout windows in gnu emacs? +;; like ^r select buffer from its emacs lunar or tmacs libraries. + +;; Copyright (C) 1985, 1986 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. + + +(require 'electric) + +;; this depends on the format of list-buffers (from src/buffer.c) and +;; on stuff in lisp/buff-menu.el + +(defvar electric-buffer-menu-mode-map nil) +(defun electric-buffer-list (arg) + "Vaguely like ITS lunar select buffer; +combining typeoutoid buffer listing with menuoid buffer selection. + +This pops up a buffer describing the set of emacs buffers. +If the very next character typed is a space then the buffer list + window disappears. + +Otherwise, one may move around in the buffer list window, marking + buffers to be selected, saved or deleted. + +To exit and select a new buffer, type Space when the cursor is on the + appropriate line of the buffer-list window. + +Other commands are much like those of buffer-menu-mode. + +Calls value of electric-buffer-menu-mode-hook on entry if non-nil. + +\\{electric-buffer-menu-mode-map}" + (interactive "P") + (let (select buffer) + (save-window-excursion + (save-window-excursion (list-buffers arg)) + (setq buffer (window-buffer (Electric-pop-up-window "*Buffer List*"))) + (unwind-protect + (progn + (set-buffer buffer) + (Electric-buffer-menu-mode) + (setq select + (catch 'electric-buffer-menu-select + (message "<<< Press Space to bury the buffer list >>>") + (if (= (setq unread-command-char (read-char)) ?\ ) + (progn (setq unread-command-char -1) + (throw 'electric-buffer-menu-select nil))) + (let ((first (progn (goto-char (point-min)) + (forward-line 2) + (point))) + (last (progn (goto-char (point-max)) + (forward-line -1) + (point))) + (goal-column 0)) + (goto-char first) + (Electric-command-loop 'electric-buffer-menu-select + nil + t + 'electric-buffer-menu-looper + (cons first last)))))) + (set-buffer buffer) + (Buffer-menu-mode) + (bury-buffer buffer) + (message ""))) + (if select + (progn (set-buffer buffer) + (let ((opoint (point-marker))) + (Buffer-menu-execute) + (goto-char (point-min)) + (if (prog1 (search-forward "\n>" nil t) + (goto-char opoint) (set-marker opoint nil)) + (Buffer-menu-select) + (switch-to-buffer (Buffer-menu-buffer t)))))))) + +(defun electric-buffer-menu-looper (state condition) + (cond ((and condition + (not (memq (car condition) '(buffer-read-only + end-of-buffer + beginning-of-buffer)))) + (signal (car condition) (cdr condition))) + ((< (point) (car state)) + (goto-char (point-min)) + (forward-line 2)) + ((> (point) (cdr state)) + (goto-char (point-max)) + (forward-line -1) + (if (pos-visible-in-window-p (point-max)) + (recenter -1))))) + +(put 'Electric-buffer-menu-mode 'mode-class 'special) +(defun Electric-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. +\\{electric-buffer-menu-mode-map} + +C-g or C-c C-c -- exit buffer menu, returning to previous window and buffer + configuration. If the very first character typed is a space, it + also has this effect. +Space -- select buffer of line point is on. + Also show buffers marked with m in other windows, + deletes buffers marked with \"D\", and saves those marked with \"S\". +m -- mark buffer to be displayed. +~ -- clear modified-flag on that buffer. +s -- mark that buffer to be saved. +d or C-d -- mark that buffer to be deleted. +u -- remove all kinds of marks from current line. +v -- view buffer, returning when done. +Delete -- back up a line and remove marks. + + +Entry to this mode via command \\[electric-buffer-list] calls the value of +electric-buffer-menu-mode-hook if it is non-nil." + (kill-all-local-variables) + (use-local-map electric-buffer-menu-mode-map) + (setq mode-name "Electric Buffer Menu") + (setq mode-line-buffer-identification "Electric Buffer List") + (if (memq 'mode-name mode-line-format) + (progn (setq mode-line-format (copy-sequence mode-line-format)) + (setcar (memq 'mode-name mode-line-format) "Buffers"))) + (make-local-variable 'Helper-return-blurb) + (setq Helper-return-blurb "return to buffer editing") + (setq truncate-lines t) + (setq buffer-read-only t) + (setq major-mode 'Electric-buffer-menu-mode) + (goto-char (point-min)) + (if (search-forward "\n." nil t) (forward-char -1)) + (run-hooks 'electric-buffer-menu-mode-hook)) + +;; generally the same as Buffer-menu-mode-map +;; (except we don't indirect to global-map) +(put 'Electric-buffer-menu-undefined 'suppress-keymap t) +(if electric-buffer-menu-mode-map + nil + (let ((map (make-keymap))) + (fillarray map 'Electric-buffer-menu-undefined) + (define-key map "\e" (make-keymap)) + (fillarray (lookup-key map "\e") 'Electric-buffer-menu-undefined) + (define-key map "\C-z" 'suspend-emacs) + (define-key map "v" 'Electric-buffer-menu-mode-view-buffer) + (define-key map "\C-h" 'Helper-help) + (define-key map "?" 'Helper-describe-bindings) + (define-key map "\C-c" nil) + (define-key map "\C-c\C-c" 'Electric-buffer-menu-quit) + (define-key map "\C-]" 'Electric-buffer-menu-quit) + (define-key map "q" 'Electric-buffer-menu-quit) + (define-key map " " 'Electric-buffer-menu-select) + (define-key map "\C-l" 'recenter) + (define-key map "s" 'Buffer-menu-save) + (define-key map "d" 'Buffer-menu-delete) + (define-key map "k" 'Buffer-menu-delete) + (define-key map "\C-d" 'Buffer-menu-delete-backwards) + ;(define-key map "\C-k" 'Buffer-menu-delete) + (define-key map "\177" 'Buffer-menu-backup-unmark) + (define-key map "~" 'Buffer-menu-not-modified) + (define-key map "u" 'Buffer-menu-unmark) + (let ((i ?0)) + (while (<= i ?9) + (define-key map (char-to-string i) 'digit-argument) + (define-key map (concat "\e" (char-to-string i)) 'digit-argument) + (setq i (1+ i)))) + (define-key map "-" 'negative-argument) + (define-key map "\e-" 'negative-argument) + (define-key map "m" 'Buffer-menu-mark) + (define-key map "\C-u" 'universal-argument) + (define-key map "\C-p" 'previous-line) + (define-key map "\C-n" 'next-line) + (define-key map "p" 'previous-line) + (define-key map "n" 'next-line) + (define-key map "\C-v" 'scroll-up) + (define-key map "\ev" 'scroll-down) + (define-key map "\e\C-v" 'scroll-other-window) + (define-key map "\e>" 'end-of-buffer) + (define-key map "\e<" 'beginning-of-buffer) + (setq electric-buffer-menu-mode-map map))) + +(defun Electric-buffer-menu-exit () + (interactive) + (setq unread-command-char last-input-char) + ;; for robustness + (condition-case () + (throw 'electric-buffer-menu-select nil) + (error (Buffer-menu-mode) + (other-buffer)))) + +(defun Electric-buffer-menu-select () + "Leave Electric Buffer Menu, selecting buffers and executing changes. +Saves buffers marked \"S\". Deletes buffers marked \"K\". +Selects buffer at point and displays buffers marked \">\" in other +windows." + (interactive) + (throw 'electric-buffer-menu-select (point))) + +(defun Electric-buffer-menu-quit () + "Leave Electric Buffer Menu, restoring previous window configuration. +Does not execute select, save, or delete commands." + (interactive) + (throw 'electric-buffer-menu-select nil)) + +(defun Electric-buffer-menu-undefined () + (interactive) + (ding) + (message (if (and (eq (key-binding "\C-c\C-c") 'Electric-buffer-menu-quit) + (eq (key-binding " ") 'Electric-buffer-menu-select) + (eq (key-binding "\C-h") 'Helper-help) + (eq (key-binding "?") 'Helper-describe-bindings)) + "Type C-c C-c to exit, Space to select, C-h for help, ? for commands" + (substitute-command-keys "\ +Type \\[Electric-buffer-menu-quit] to exit, \ +\\[Electric-buffer-menu-select] to select, \ +\\[Helper-help] for help, \\[Helper-describe-bindings] for commands."))) + (sit-for 4)) + +(defun Electric-buffer-menu-mode-view-buffer () + "View buffer on current line in Electric Buffer Menu. +Returns to Electric Buffer Menu when done." + (interactive) + (let ((bufnam (Buffer-menu-buffer nil))) + (if bufnam + (view-buffer bufnam) + (ding) + (message "Buffer %s does not exist!" bufnam) + (sit-for 4)))) + + + + |