Commit | Line | Data |
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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 | ||
5e9f6c44 GM |
42 | (defun scroll-all-function-all (func arg) |
43 | "Apply function FUNC with argument ARG to all visible windows." | |
11a66c13 | 44 | (let ((num-windows (count-windows)) |
c9787897 | 45 | (count 1)) |
6036654e | 46 | (when (> num-windows 1) |
c9787897 RS |
47 | (other-window 1) |
48 | (while (< count num-windows) | |
5e9f6c44 GM |
49 | (condition-case nil |
50 | (funcall func arg) | |
51 | ;; Ignore beginning- or end-of-buffer error in other windows. | |
52 | (error nil) | |
53 | ) | |
c9787897 RS |
54 | (other-window 1) |
55 | (setq count (1+ count)))))) | |
11a66c13 | 56 | |
5e9f6c44 GM |
57 | (defun scroll-all-scroll-down-all (arg) |
58 | "Scroll down in all visible windows." | |
59 | (interactive "p") | |
60 | (scroll-all-function-all 'next-line arg)) | |
61 | ||
beaf629d | 62 | (defun scroll-all-scroll-up-all (arg) |
5e9f6c44 GM |
63 | "Scroll up in all visible windows." |
64 | (interactive "p") | |
65 | (scroll-all-function-all 'previous-line arg)) | |
11a66c13 | 66 | |
beaf629d RS |
67 | (defun scroll-all-page-down-all (arg) |
68 | "Page down in all visible windows." | |
11a66c13 | 69 | (interactive "P") |
5e9f6c44 | 70 | (scroll-all-function-all 'scroll-up arg)) |
11a66c13 | 71 | |
beaf629d RS |
72 | (defun scroll-all-page-up-all (arg) |
73 | "Page up in all visible windows." | |
11a66c13 | 74 | (interactive "P") |
5e9f6c44 | 75 | (scroll-all-function-all 'scroll-down arg)) |
6036654e GM |
76 | |
77 | (defun scroll-all-beginning-of-buffer-all (arg) | |
78 | "Go to the beginning of the buffer in all visible windows." | |
79 | (interactive "P") | |
5e9f6c44 | 80 | (scroll-all-function-all 'beginning-of-buffer arg)) |
6036654e GM |
81 | |
82 | (defun scroll-all-end-of-buffer-all (arg) | |
83 | "Go to the end of the buffer in all visible windows." | |
84 | (interactive "P") | |
5e9f6c44 | 85 | (scroll-all-function-all 'end-of-buffer arg)) |
11a66c13 RS |
86 | |
87 | ||
beaf629d | 88 | (defun scroll-all-check-to-scroll () |
75272a3a | 89 | "Check `this-command' to see if a scroll is to be done." |
c9787897 RS |
90 | (cond ((eq this-command 'next-line) |
91 | (call-interactively 'scroll-all-scroll-down-all)) | |
92 | ((eq this-command 'previous-line) | |
93 | (call-interactively 'scroll-all-scroll-up-all)) | |
94 | ((eq this-command 'scroll-up) | |
95 | (call-interactively 'scroll-all-page-down-all)) | |
96 | ((eq this-command 'scroll-down) | |
97 | (call-interactively 'scroll-all-page-up-all)) | |
98 | ((eq this-command 'beginning-of-buffer) | |
99 | (call-interactively 'scroll-all-beginning-of-buffer-all)) | |
100 | ((eq this-command 'end-of-buffer) | |
101 | (call-interactively 'scroll-all-end-of-buffer-all)))) | |
f1180544 | 102 | |
11a66c13 | 103 | |
052e4f5e | 104 | ;;;###autoload |
ddff27f9 | 105 | (define-minor-mode scroll-all-mode |
da5d3a56 GM |
106 | "Toggle Scroll-All minor mode. |
107 | With ARG, turn Scroll-All minor mode on if ARG is positive, off otherwise. | |
108 | When Scroll-All mode is on, scrolling commands entered in one window | |
109 | apply to all visible windows in the same frame." | |
ddff27f9 MR |
110 | nil " *SL*" nil |
111 | :global t | |
3ff2317b MR |
112 | :group 'windows |
113 | :group 'scrolling | |
091b5fdb GM |
114 | (if scroll-all-mode |
115 | (add-hook 'post-command-hook 'scroll-all-check-to-scroll) | |
116 | (remove-hook 'post-command-hook 'scroll-all-check-to-scroll))) | |
11a66c13 | 117 | |
beaf629d | 118 | (provide 'scroll-all) |
11a66c13 | 119 | |
e8af40ee | 120 | ;;; scroll-all.el ends here |