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5abdc915 | 1 | ;;; scroll-all.el -- scroll all buffers together minor mode |
11a66c13 RS |
2 | |
3 | ;; Copyright (C) 1997 Free Software Foundation, Inc. | |
4 | ||
5 | ;; Author: Gary D. Foster <Gary.Foster@corp.sun.com> | |
6 | ;; Keywords: scroll crisp brief lock | |
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 | ;; This mode allows multiple buffers to be 'locked' so that scrolling | |
27 | ;; up or down lines in any buffer causes all the buffers to mirror | |
28 | ;; the scrolling. It hooks into the post-command-hook to check for | |
29 | ;; potential scrolling commands and if we're locked, mirrors them in all | |
30 | ;; windows. This allows us to grab line-at-a-time scrolling as well as | |
31 | ;; screen-at-a-time scrolling, and doesn't remap any of the keyboard | |
32 | ;; commands to do it. | |
33 | ||
beaf629d | 34 | ;; You can enable and disable this mode with the 'scroll-all-mode' command. |
11a66c13 RS |
35 | |
36 | ;; Suggestions/ideas from: | |
37 | ;; Rick Macdonald <rickm@vsl.com> | |
38 | ;; Anders Lindgren <andersl@csd.uu.se> | |
39 | ||
40 | (defvar running-xemacs (string-match "XEmacs\\|Lucid" emacs-version)) | |
052e4f5e DL |
41 | |
42 | ;;;###autoload | |
43 | (defcustom scroll-all-mode nil | |
44 | "Control/track scroll locking. | |
45 | ||
46 | Setting this variable directly does not take effect; | |
47 | use either M-x customize or the function `scroll-all-mode'." | |
48 | :set (lambda (symbol value) (scroll-all-mode (if value 1 0))) | |
49 | :initialize 'custom-initialize-default | |
50 | :require 'scroll-all | |
51 | :type 'boolean | |
52 | :group 'windows) | |
53 | ||
11a66c13 | 54 | (if running-xemacs |
beaf629d RS |
55 | (add-minor-mode 'scroll-all-mode " *SL*") |
56 | (or (assq 'scroll-all-mode-mode minor-mode-alist) | |
11a66c13 | 57 | (setq minor-mode-alist |
beaf629d | 58 | (cons '(scroll-all-mode-mode " *SL*") minor-mode-alist)))) |
11a66c13 | 59 | |
beaf629d RS |
60 | (defun scroll-all-scroll-down-all (arg) |
61 | "Scroll down all visible windows." | |
11a66c13 RS |
62 | (interactive "P") |
63 | (let ((num-windows (count-windows)) | |
64 | (count 1)) | |
65 | (if (> num-windows 1) | |
66 | ( progn (other-window 1) | |
67 | (while (< count num-windows) | |
68 | (if (not (eq (point) (point-max))) | |
69 | (progn (call-interactively 'next-line))) | |
70 | (other-window 1) | |
71 | (setq count (1+ count))))))) | |
72 | ||
beaf629d RS |
73 | (defun scroll-all-scroll-up-all (arg) |
74 | "Scroll up all visible windows." | |
11a66c13 RS |
75 | (interactive "P") |
76 | (let ((num-windows (count-windows)) | |
77 | (count 1)) | |
78 | (if (> num-windows 1) | |
79 | ( progn (other-window 1) | |
80 | (while (< count num-windows) | |
81 | (if (not (eq (point) (point-min))) | |
82 | (progn (call-interactively 'previous-line))) | |
83 | (other-window 1) | |
84 | (setq count (1+ count))))))) | |
85 | ||
beaf629d RS |
86 | (defun scroll-all-page-down-all (arg) |
87 | "Page down in all visible windows." | |
11a66c13 RS |
88 | (interactive "P") |
89 | (let ((num-windows (count-windows)) | |
90 | (count 1)) | |
91 | (if (> num-windows 1) | |
92 | (progn (other-window 1) | |
93 | (while (< count num-windows) | |
94 | (call-interactively 'fkey-scroll-up) | |
95 | (other-window 1) | |
96 | (setq count (1+ count))))))) | |
97 | ||
beaf629d RS |
98 | (defun scroll-all-page-up-all (arg) |
99 | "Page up in all visible windows." | |
11a66c13 RS |
100 | (interactive "P") |
101 | (let ((num-windows (count-windows)) | |
102 | (count 1)) | |
103 | (if (> num-windows 1) | |
104 | (progn (other-window 1) | |
105 | (while (< count num-windows) | |
106 | (call-interactively 'fkey-scroll-down) | |
107 | (other-window 1) | |
108 | (setq count (1+ count))))))) | |
109 | ||
110 | ||
beaf629d RS |
111 | (defun scroll-all-check-to-scroll () |
112 | "Check `last-command' to see if a scroll was done." | |
11a66c13 | 113 | (if (eq this-command 'next-line) |
beaf629d | 114 | (call-interactively 'scroll-all-scroll-down-all)) |
11a66c13 | 115 | (if (eq this-command 'previous-line) |
beaf629d | 116 | (call-interactively 'scroll-all-scroll-up-all)) |
11a66c13 | 117 | (if (eq this-command 'fkey-scroll-up) |
beaf629d | 118 | (call-interactively 'scroll-all-page-down-all)) |
11a66c13 | 119 | (if (eq this-command 'fkey-scroll-down) |
beaf629d | 120 | (call-interactively 'scroll-all-page-up-all))) |
11a66c13 | 121 | |
052e4f5e | 122 | ;;;###autoload |
beaf629d RS |
123 | (defun scroll-all-mode (arg) |
124 | "Toggle Scroll-All minor mode." | |
11a66c13 | 125 | (interactive "P") |
beaf629d | 126 | (setq scroll-all-mode (not scroll-all-mode)) |
11a66c13 | 127 | (cond |
beaf629d RS |
128 | ((eq scroll-all-mode 't) |
129 | (add-hook 'post-command-hook 'scroll-all-check-to-scroll)) | |
130 | ((eq scroll-all-mode 'nil) | |
131 | (remove-hook 'post-command-hook 'scroll-all-check-to-scroll)))) | |
11a66c13 | 132 | |
beaf629d | 133 | (provide 'scroll-all) |
11a66c13 RS |
134 | |
135 | ;; scroll-all.el ends here |