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e8af40ee | 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 | ||
e8af40ee | 25 | ;;; Commentary: |
11a66c13 RS |
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 | ||
e8af40ee PJ |
40 | ;;; Code: |
41 | ||
11a66c13 | 42 | (defvar running-xemacs (string-match "XEmacs\\|Lucid" emacs-version)) |
052e4f5e DL |
43 | |
44 | ;;;###autoload | |
45 | (defcustom scroll-all-mode nil | |
46 | "Control/track scroll locking. | |
47 | ||
48 | Setting this variable directly does not take effect; | |
49 | use either M-x customize or the function `scroll-all-mode'." | |
50 | :set (lambda (symbol value) (scroll-all-mode (if value 1 0))) | |
51 | :initialize 'custom-initialize-default | |
52 | :require 'scroll-all | |
53 | :type 'boolean | |
54 | :group 'windows) | |
55 | ||
11a66c13 | 56 | (if running-xemacs |
beaf629d | 57 | (add-minor-mode 'scroll-all-mode " *SL*") |
75272a3a | 58 | (or (assq 'scroll-all-mode minor-mode-alist) |
11a66c13 | 59 | (setq minor-mode-alist |
75272a3a | 60 | (cons '(scroll-all-mode " *SL*") minor-mode-alist)))) |
11a66c13 | 61 | |
beaf629d RS |
62 | (defun scroll-all-scroll-down-all (arg) |
63 | "Scroll down all visible windows." | |
11a66c13 RS |
64 | (interactive "P") |
65 | (let ((num-windows (count-windows)) | |
c9787897 | 66 | (count 1)) |
6036654e | 67 | (when (> num-windows 1) |
c9787897 RS |
68 | (other-window 1) |
69 | (while (< count num-windows) | |
70 | (if (not (eq (point) (point-max))) | |
71 | (call-interactively 'next-line)) | |
72 | (other-window 1) | |
73 | (setq count (1+ count)))))) | |
11a66c13 | 74 | |
beaf629d RS |
75 | (defun scroll-all-scroll-up-all (arg) |
76 | "Scroll up all visible windows." | |
11a66c13 RS |
77 | (interactive "P") |
78 | (let ((num-windows (count-windows)) | |
c9787897 | 79 | (count 1)) |
6036654e | 80 | (when (> num-windows 1) |
c9787897 RS |
81 | (other-window 1) |
82 | (while (< count num-windows) | |
83 | (if (not (eq (point) (point-min))) | |
84 | (call-interactively 'previous-line)) | |
85 | (other-window 1) | |
86 | (setq count (1+ count)))))) | |
11a66c13 | 87 | |
beaf629d RS |
88 | (defun scroll-all-page-down-all (arg) |
89 | "Page down in all visible windows." | |
11a66c13 RS |
90 | (interactive "P") |
91 | (let ((num-windows (count-windows)) | |
c9787897 | 92 | (count 1)) |
6036654e | 93 | (when (> num-windows 1) |
c9787897 RS |
94 | (other-window 1) |
95 | (while (< count num-windows) | |
96 | (condition-case nil | |
97 | (call-interactively 'scroll-up) (end-of-buffer nil)) | |
98 | (other-window 1) | |
99 | (setq count (1+ count)))))) | |
11a66c13 | 100 | |
beaf629d RS |
101 | (defun scroll-all-page-up-all (arg) |
102 | "Page up in all visible windows." | |
11a66c13 RS |
103 | (interactive "P") |
104 | (let ((num-windows (count-windows)) | |
c9787897 | 105 | (count 1)) |
6036654e | 106 | (when (> num-windows 1) |
c9787897 RS |
107 | (other-window 1) |
108 | (while (< count num-windows) | |
109 | (condition-case nil | |
110 | (call-interactively 'scroll-down) (beginning-of-buffer nil)) | |
111 | (other-window 1) | |
112 | (setq count (1+ count)))))) | |
6036654e GM |
113 | |
114 | (defun scroll-all-beginning-of-buffer-all (arg) | |
115 | "Go to the beginning of the buffer in all visible windows." | |
116 | (interactive "P") | |
117 | (let ((num-windows (count-windows)) | |
c9787897 | 118 | (count 1)) |
6036654e | 119 | (when (> num-windows 1) |
c9787897 RS |
120 | (other-window 1) |
121 | (while (< count num-windows) | |
122 | (call-interactively 'beginning-of-buffer) | |
123 | (other-window 1) | |
124 | (setq count (1+ count)))))) | |
6036654e GM |
125 | |
126 | (defun scroll-all-end-of-buffer-all (arg) | |
127 | "Go to the end of the buffer in all visible windows." | |
128 | (interactive "P") | |
129 | (let ((num-windows (count-windows)) | |
c9787897 | 130 | (count 1)) |
6036654e | 131 | (when (> num-windows 1) |
c9787897 RS |
132 | (other-window 1) |
133 | (while (< count num-windows) | |
134 | (call-interactively 'end-of-buffer) | |
135 | (other-window 1) | |
136 | (setq count (1+ count)))))) | |
11a66c13 RS |
137 | |
138 | ||
beaf629d | 139 | (defun scroll-all-check-to-scroll () |
75272a3a | 140 | "Check `this-command' to see if a scroll is to be done." |
c9787897 RS |
141 | (cond ((eq this-command 'next-line) |
142 | (call-interactively 'scroll-all-scroll-down-all)) | |
143 | ((eq this-command 'previous-line) | |
144 | (call-interactively 'scroll-all-scroll-up-all)) | |
145 | ((eq this-command 'scroll-up) | |
146 | (call-interactively 'scroll-all-page-down-all)) | |
147 | ((eq this-command 'scroll-down) | |
148 | (call-interactively 'scroll-all-page-up-all)) | |
149 | ((eq this-command 'beginning-of-buffer) | |
150 | (call-interactively 'scroll-all-beginning-of-buffer-all)) | |
151 | ((eq this-command 'end-of-buffer) | |
152 | (call-interactively 'scroll-all-end-of-buffer-all)))) | |
6036654e | 153 | |
11a66c13 | 154 | |
052e4f5e | 155 | ;;;###autoload |
beaf629d RS |
156 | (defun scroll-all-mode (arg) |
157 | "Toggle Scroll-All minor mode." | |
11a66c13 | 158 | (interactive "P") |
beaf629d | 159 | (setq scroll-all-mode (not scroll-all-mode)) |
11a66c13 | 160 | (cond |
beaf629d RS |
161 | ((eq scroll-all-mode 't) |
162 | (add-hook 'post-command-hook 'scroll-all-check-to-scroll)) | |
163 | ((eq scroll-all-mode 'nil) | |
164 | (remove-hook 'post-command-hook 'scroll-all-check-to-scroll)))) | |
11a66c13 | 165 | |
beaf629d | 166 | (provide 'scroll-all) |
11a66c13 | 167 | |
e8af40ee | 168 | ;;; scroll-all.el ends here |