| 1 | ;;; scroll-all.el --- scroll all buffers together minor mode |
| 2 | |
| 3 | ;; Copyright (C) 1997, 2002, 2003, 2004, 2005, |
| 4 | ;; 2006 Free Software Foundation, Inc. |
| 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 | |
| 11 | ;; GNU Emacs is free software; you can redistribute it and/or modify |
| 12 | ;; it under the terms of the GNU General Public License as published by |
| 13 | ;; the Free Software Foundation; either version 2, or (at your option) |
| 14 | ;; any later version. |
| 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 |
| 22 | ;; along with GNU Emacs; see the file COPYING. If not, write to the |
| 23 | ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| 24 | ;; Boston, MA 02110-1301, USA. |
| 25 | |
| 26 | ;;; Commentary: |
| 27 | ;; This mode allows multiple buffers to be 'locked' so that scrolling |
| 28 | ;; up or down lines in any buffer causes all the buffers to mirror |
| 29 | ;; the scrolling. It hooks into the post-command-hook to check for |
| 30 | ;; potential scrolling commands and if we're locked, mirrors them in all |
| 31 | ;; windows. This allows us to grab line-at-a-time scrolling as well as |
| 32 | ;; screen-at-a-time scrolling, and doesn't remap any of the keyboard |
| 33 | ;; commands to do it. |
| 34 | |
| 35 | ;; You can enable and disable this mode with the 'scroll-all-mode' command. |
| 36 | |
| 37 | ;; Suggestions/ideas from: |
| 38 | ;; Rick Macdonald <rickm@vsl.com> |
| 39 | ;; Anders Lindgren <andersl@csd.uu.se> |
| 40 | |
| 41 | ;;; Code: |
| 42 | |
| 43 | (defun scroll-all-function-all (func arg) |
| 44 | "Apply function FUNC with argument ARG to all visible windows." |
| 45 | (let ((num-windows (count-windows)) |
| 46 | (count 1)) |
| 47 | (when (> num-windows 1) |
| 48 | (other-window 1) |
| 49 | (while (< count num-windows) |
| 50 | (condition-case nil |
| 51 | (funcall func arg) |
| 52 | ;; Ignore beginning- or end-of-buffer error in other windows. |
| 53 | (error nil) |
| 54 | ) |
| 55 | (other-window 1) |
| 56 | (setq count (1+ count)))))) |
| 57 | |
| 58 | (defun scroll-all-scroll-down-all (arg) |
| 59 | "Scroll down in all visible windows." |
| 60 | (interactive "p") |
| 61 | (scroll-all-function-all 'next-line arg)) |
| 62 | |
| 63 | (defun scroll-all-scroll-up-all (arg) |
| 64 | "Scroll up in all visible windows." |
| 65 | (interactive "p") |
| 66 | (scroll-all-function-all 'previous-line arg)) |
| 67 | |
| 68 | (defun scroll-all-page-down-all (arg) |
| 69 | "Page down in all visible windows." |
| 70 | (interactive "P") |
| 71 | (scroll-all-function-all 'scroll-up arg)) |
| 72 | |
| 73 | (defun scroll-all-page-up-all (arg) |
| 74 | "Page up in all visible windows." |
| 75 | (interactive "P") |
| 76 | (scroll-all-function-all 'scroll-down arg)) |
| 77 | |
| 78 | (defun scroll-all-beginning-of-buffer-all (arg) |
| 79 | "Go to the beginning of the buffer in all visible windows." |
| 80 | (interactive "P") |
| 81 | (scroll-all-function-all 'beginning-of-buffer arg)) |
| 82 | |
| 83 | (defun scroll-all-end-of-buffer-all (arg) |
| 84 | "Go to the end of the buffer in all visible windows." |
| 85 | (interactive "P") |
| 86 | (scroll-all-function-all 'end-of-buffer arg)) |
| 87 | |
| 88 | |
| 89 | (defun scroll-all-check-to-scroll () |
| 90 | "Check `this-command' to see if a scroll is to be done." |
| 91 | (cond ((eq this-command 'next-line) |
| 92 | (call-interactively 'scroll-all-scroll-down-all)) |
| 93 | ((eq this-command 'previous-line) |
| 94 | (call-interactively 'scroll-all-scroll-up-all)) |
| 95 | ((eq this-command 'scroll-up) |
| 96 | (call-interactively 'scroll-all-page-down-all)) |
| 97 | ((eq this-command 'scroll-down) |
| 98 | (call-interactively 'scroll-all-page-up-all)) |
| 99 | ((eq this-command 'beginning-of-buffer) |
| 100 | (call-interactively 'scroll-all-beginning-of-buffer-all)) |
| 101 | ((eq this-command 'end-of-buffer) |
| 102 | (call-interactively 'scroll-all-end-of-buffer-all)))) |
| 103 | |
| 104 | |
| 105 | ;;;###autoload |
| 106 | (define-minor-mode scroll-all-mode |
| 107 | "Toggle Scroll-All minor mode. |
| 108 | With ARG, turn Scroll-All minor mode on if ARG is positive, off otherwise. |
| 109 | When Scroll-All mode is on, scrolling commands entered in one window |
| 110 | apply to all visible windows in the same frame." |
| 111 | nil " *SL*" nil |
| 112 | :global t |
| 113 | :group 'windows |
| 114 | :group 'scrolling |
| 115 | (if scroll-all-mode |
| 116 | (add-hook 'post-command-hook 'scroll-all-check-to-scroll) |
| 117 | (remove-hook 'post-command-hook 'scroll-all-check-to-scroll))) |
| 118 | |
| 119 | (provide 'scroll-all) |
| 120 | |
| 121 | ;;; arch-tag: db20089a-b157-45df-b5d4-2430e60acdd8 |
| 122 | ;;; scroll-all.el ends here |