Commit | Line | Data |
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e8af40ee | 1 | ;;; scroll-all.el --- scroll all buffers together minor mode |
11a66c13 | 2 | |
c90f2757 | 3 | ;; Copyright (C) 1997, 2001, 2002, 2003, 2004, 2005, |
114f9c96 | 4 | ;; 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc. |
11a66c13 RS |
5 | |
6 | ;; Author: Gary D. Foster <Gary.Foster@corp.sun.com> | |
7 | ;; Keywords: scroll crisp brief lock | |
8 | ||
9 | ;; This file is part of GNU Emacs. | |
10 | ||
eb3fa2cf | 11 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
11a66c13 | 12 | ;; it under the terms of the GNU General Public License as published by |
eb3fa2cf GM |
13 | ;; the Free Software Foundation, either version 3 of the License, or |
14 | ;; (at your option) any later version. | |
11a66c13 RS |
15 | |
16 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
17 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | ;; GNU General Public License for more details. | |
20 | ||
21 | ;; You should have received a copy of the GNU General Public License | |
eb3fa2cf | 22 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
11a66c13 | 23 | |
e8af40ee | 24 | ;;; Commentary: |
11a66c13 RS |
25 | ;; This mode allows multiple buffers to be 'locked' so that scrolling |
26 | ;; up or down lines in any buffer causes all the buffers to mirror | |
27 | ;; the scrolling. It hooks into the post-command-hook to check for | |
28 | ;; potential scrolling commands and if we're locked, mirrors them in all | |
4fffd73b | 29 | ;; windows. This allows us to grab line-at-a-time scrolling as well as |
11a66c13 RS |
30 | ;; screen-at-a-time scrolling, and doesn't remap any of the keyboard |
31 | ;; commands to do it. | |
32 | ||
beaf629d | 33 | ;; You can enable and disable this mode with the 'scroll-all-mode' command. |
11a66c13 RS |
34 | |
35 | ;; Suggestions/ideas from: | |
36 | ;; Rick Macdonald <rickm@vsl.com> | |
37 | ;; Anders Lindgren <andersl@csd.uu.se> | |
38 | ||
e8af40ee PJ |
39 | ;;; Code: |
40 | ||
5e9f6c44 GM |
41 | (defun scroll-all-function-all (func arg) |
42 | "Apply function FUNC with argument ARG to all visible windows." | |
11a66c13 | 43 | (let ((num-windows (count-windows)) |
c9787897 | 44 | (count 1)) |
6036654e | 45 | (when (> num-windows 1) |
c9787897 RS |
46 | (other-window 1) |
47 | (while (< count num-windows) | |
5e9f6c44 GM |
48 | (condition-case nil |
49 | (funcall func arg) | |
50 | ;; Ignore beginning- or end-of-buffer error in other windows. | |
51 | (error nil) | |
52 | ) | |
c9787897 RS |
53 | (other-window 1) |
54 | (setq count (1+ count)))))) | |
11a66c13 | 55 | |
5e9f6c44 GM |
56 | (defun scroll-all-scroll-down-all (arg) |
57 | "Scroll down in all visible windows." | |
58 | (interactive "p") | |
59 | (scroll-all-function-all 'next-line arg)) | |
60 | ||
beaf629d | 61 | (defun scroll-all-scroll-up-all (arg) |
5e9f6c44 GM |
62 | "Scroll up in all visible windows." |
63 | (interactive "p") | |
64 | (scroll-all-function-all 'previous-line arg)) | |
11a66c13 | 65 | |
beaf629d RS |
66 | (defun scroll-all-page-down-all (arg) |
67 | "Page down in all visible windows." | |
11a66c13 | 68 | (interactive "P") |
5e9f6c44 | 69 | (scroll-all-function-all 'scroll-up arg)) |
11a66c13 | 70 | |
beaf629d RS |
71 | (defun scroll-all-page-up-all (arg) |
72 | "Page up in all visible windows." | |
11a66c13 | 73 | (interactive "P") |
5e9f6c44 | 74 | (scroll-all-function-all 'scroll-down arg)) |
6036654e GM |
75 | |
76 | (defun scroll-all-beginning-of-buffer-all (arg) | |
77 | "Go to the beginning of the buffer in all visible windows." | |
78 | (interactive "P") | |
5e9f6c44 | 79 | (scroll-all-function-all 'beginning-of-buffer arg)) |
6036654e GM |
80 | |
81 | (defun scroll-all-end-of-buffer-all (arg) | |
82 | "Go to the end of the buffer in all visible windows." | |
83 | (interactive "P") | |
5e9f6c44 | 84 | (scroll-all-function-all 'end-of-buffer arg)) |
11a66c13 RS |
85 | |
86 | ||
beaf629d | 87 | (defun scroll-all-check-to-scroll () |
75272a3a | 88 | "Check `this-command' to see if a scroll is to be done." |
c9787897 RS |
89 | (cond ((eq this-command 'next-line) |
90 | (call-interactively 'scroll-all-scroll-down-all)) | |
91 | ((eq this-command 'previous-line) | |
92 | (call-interactively 'scroll-all-scroll-up-all)) | |
93 | ((eq this-command 'scroll-up) | |
94 | (call-interactively 'scroll-all-page-down-all)) | |
95 | ((eq this-command 'scroll-down) | |
96 | (call-interactively 'scroll-all-page-up-all)) | |
97 | ((eq this-command 'beginning-of-buffer) | |
98 | (call-interactively 'scroll-all-beginning-of-buffer-all)) | |
99 | ((eq this-command 'end-of-buffer) | |
100 | (call-interactively 'scroll-all-end-of-buffer-all)))) | |
f1180544 | 101 | |
11a66c13 | 102 | |
052e4f5e | 103 | ;;;###autoload |
ddff27f9 | 104 | (define-minor-mode scroll-all-mode |
da5d3a56 GM |
105 | "Toggle Scroll-All minor mode. |
106 | With ARG, turn Scroll-All minor mode on if ARG is positive, off otherwise. | |
107 | When Scroll-All mode is on, scrolling commands entered in one window | |
108 | apply to all visible windows in the same frame." | |
ddff27f9 MR |
109 | nil " *SL*" nil |
110 | :global t | |
3ff2317b MR |
111 | :group 'windows |
112 | :group 'scrolling | |
091b5fdb GM |
113 | (if scroll-all-mode |
114 | (add-hook 'post-command-hook 'scroll-all-check-to-scroll) | |
115 | (remove-hook 'post-command-hook 'scroll-all-check-to-scroll))) | |
11a66c13 | 116 | |
beaf629d | 117 | (provide 'scroll-all) |
11a66c13 | 118 | |
cbee283d | 119 | ;; arch-tag: db20089a-b157-45df-b5d4-2430e60acdd8 |
e8af40ee | 120 | ;;; scroll-all.el ends here |