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1 | ;;; text-mode.el --- text mode, and its idiosyncratic commands. |
2 | ||
daa37602 | 3 | ;; Copyright (C) 1985, 1992 Free Software Foundation, Inc. |
a2535589 | 4 | |
58142744 ER |
5 | ;; Maintainer: FSF |
6 | ||
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7 | ;; This file is part of GNU Emacs. |
8 | ||
9 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
10 | ;; it under the terms of the GNU General Public License as published by | |
daa37602 | 11 | ;; the Free Software Foundation; either version 2, or (at your option) |
a2535589 JA |
12 | ;; any later version. |
13 | ||
14 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
15 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | ;; GNU General Public License for more details. | |
18 | ||
19 | ;; You should have received a copy of the GNU General Public License | |
20 | ;; along with GNU Emacs; see the file COPYING. If not, write to | |
21 | ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
22 | ||
d9ecc911 ER |
23 | |
24 | ;;; Commentary: | |
25 | ||
26 | ;; This package provides the fundamental text mode documented in the | |
27 | ;; Emacs user's manual. | |
28 | ||
22a89ee8 | 29 | ;;; Code: |
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30 | |
31 | (defvar text-mode-syntax-table nil | |
32 | "Syntax table used while in text mode.") | |
33 | ||
34 | (defvar text-mode-abbrev-table nil | |
35 | "Abbrev table used while in text mode.") | |
36 | (define-abbrev-table 'text-mode-abbrev-table ()) | |
37 | ||
38 | (if text-mode-syntax-table | |
39 | () | |
40 | (setq text-mode-syntax-table (make-syntax-table)) | |
41 | (modify-syntax-entry ?\" ". " text-mode-syntax-table) | |
42 | (modify-syntax-entry ?\\ ". " text-mode-syntax-table) | |
43 | (modify-syntax-entry ?' "w " text-mode-syntax-table)) | |
44 | ||
45 | (defvar text-mode-map nil | |
46 | "Keymap for Text mode. | |
47 | Many other modes, such as Mail mode, Outline mode and Indented Text mode, | |
48 | inherit all the commands defined in this map.") | |
49 | ||
50 | (if text-mode-map | |
51 | () | |
52 | (setq text-mode-map (make-sparse-keymap)) | |
53 | (define-key text-mode-map "\t" 'tab-to-tab-stop) | |
54 | (define-key text-mode-map "\es" 'center-line) | |
55 | (define-key text-mode-map "\eS" 'center-paragraph)) | |
56 | ||
57 | \f | |
58 | ;(defun non-saved-text-mode () | |
59 | ; "Like text-mode, but delete auto save file when file is saved for real." | |
60 | ; (text-mode) | |
61 | ; (make-local-variable 'delete-auto-save-files) | |
62 | ; (setq delete-auto-save-files t)) | |
63 | ||
64 | (defun text-mode () | |
65 | "Major mode for editing text intended for humans to read. Special commands:\\{text-mode-map} | |
d367fa71 | 66 | Turning on Text mode calls the value of the variable `text-mode-hook', |
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67 | if that value is non-nil." |
68 | (interactive) | |
69 | (kill-all-local-variables) | |
70 | (use-local-map text-mode-map) | |
71 | (setq mode-name "Text") | |
72 | (setq major-mode 'text-mode) | |
73 | (setq local-abbrev-table text-mode-abbrev-table) | |
74 | (set-syntax-table text-mode-syntax-table) | |
75 | (run-hooks 'text-mode-hook)) | |
76 | ||
77 | (defvar indented-text-mode-map () | |
78 | "Keymap for Indented Text mode. | |
79 | All the commands defined in Text mode are inherited unless overridden.") | |
80 | ||
81 | (if indented-text-mode-map | |
82 | () | |
eb8c3be9 | 83 | ;; Make different definition for TAB before the one in text-mode-map, but |
8c73a61a JB |
84 | ;; share the rest. |
85 | (let ((newmap (make-sparse-keymap))) | |
86 | (define-key newmap "\t" 'indent-relative) | |
87 | (setq indented-text-mode-map (nconc newmap text-mode-map)))) | |
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88 | |
89 | (defun indented-text-mode () | |
90 | "Major mode for editing indented text intended for humans to read.\\{indented-text-mode-map} | |
d367fa71 CZ |
91 | Turning on `indented-text-mode' calls the value of the variable |
92 | `text-mode-hook', if that value is non-nil." | |
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93 | (interactive) |
94 | (kill-all-local-variables) | |
95 | (use-local-map text-mode-map) | |
96 | (define-abbrev-table 'text-mode-abbrev-table ()) | |
97 | (setq local-abbrev-table text-mode-abbrev-table) | |
98 | (set-syntax-table text-mode-syntax-table) | |
99 | (make-local-variable 'indent-line-function) | |
100 | (setq indent-line-function 'indent-relative-maybe) | |
101 | (use-local-map indented-text-mode-map) | |
102 | (setq mode-name "Indented Text") | |
103 | (setq major-mode 'indented-text-mode) | |
104 | (run-hooks 'text-mode-hook)) | |
105 | ||
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106 | (defun center-paragraph () |
107 | "Center each nonblank line in the paragraph at or after point. | |
d367fa71 | 108 | See `center-line' for more info." |
a2535589 JA |
109 | (interactive) |
110 | (save-excursion | |
111 | (forward-paragraph) | |
112 | (or (bolp) (newline 1)) | |
113 | (let ((end (point))) | |
114 | (backward-paragraph) | |
115 | (center-region (point) end)))) | |
116 | ||
117 | (defun center-region (from to) | |
118 | "Center each nonblank line starting in the region. | |
d367fa71 | 119 | See `center-line' for more info." |
a2535589 JA |
120 | (interactive "r") |
121 | (if (> from to) | |
122 | (let ((tem to)) | |
123 | (setq to from from tem))) | |
124 | (save-excursion | |
125 | (save-restriction | |
126 | (narrow-to-region from to) | |
127 | (goto-char from) | |
128 | (while (not (eobp)) | |
129 | (or (save-excursion (skip-chars-forward " \t") (eolp)) | |
130 | (center-line)) | |
131 | (forward-line 1))))) | |
132 | ||
133 | (defun center-line () | |
134 | "Center the line point is on, within the width specified by `fill-column'. | |
135 | This means adjusting the indentation so that it equals | |
136 | the distance between the end of the text and `fill-column'." | |
137 | (interactive) | |
138 | (save-excursion | |
139 | (let (line-length) | |
140 | (beginning-of-line) | |
141 | (delete-horizontal-space) | |
142 | (end-of-line) | |
143 | (delete-horizontal-space) | |
144 | (setq line-length (current-column)) | |
145 | (beginning-of-line) | |
146 | (indent-to | |
147 | (+ left-margin | |
148 | (/ (- fill-column left-margin line-length) 2)))))) | |
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149 | |
150 | ;;; text-mode.el ends here |