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1 ;;; text-mode.el --- text mode, and its idiosyncratic commands.
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2
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3 ;; Copyright (C) 1985, 1992, 1994 Free Software Foundation, Inc.
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4
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5 ;; Maintainer: FSF
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6
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7 ;; This file is part of XEmacs.
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8
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9 ;; XEmacs is free software; you can redistribute it and/or modify it
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10 ;; under the terms of the GNU General Public License as published by
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11 ;; the Free Software Foundation; either version 2, or (at your option)
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12 ;; any later version.
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13
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14 ;; XEmacs is distributed in the hope that it will be useful, but
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15 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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17 ;; General Public License for more details.
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18
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19 ;; You should have received a copy of the GNU General Public License
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20 ;; along with XEmacs; see the file COPYING. If not, write to the Free
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21 ;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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22 ;; 02111-1307, USA.
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23
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24 ;;; Synched up with: FSF 19.34.
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25
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26 ;;; Commentary:
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27
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28 ;; This package provides the fundamental text mode documented in the
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29 ;; Emacs user's manual.
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30
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31 ;;; Code:
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32
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33 (defvar text-mode-syntax-table nil
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34 "Syntax table used while in text mode.")
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35
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36 (defvar text-mode-abbrev-table nil
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37 "Abbrev table used while in text mode.")
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38 (define-abbrev-table 'text-mode-abbrev-table ())
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39
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40 (if text-mode-syntax-table
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41 ()
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42 (setq text-mode-syntax-table (make-syntax-table))
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43 (modify-syntax-entry ?\" ". " text-mode-syntax-table)
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44 (modify-syntax-entry ?\\ ". " text-mode-syntax-table)
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45 (modify-syntax-entry ?' "w " text-mode-syntax-table))
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46
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47 (defvar text-mode-map nil
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48 "Keymap for Text mode.
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49 Many other modes, such as Mail mode, Outline mode and Indented Text mode,
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50 inherit all the commands defined in this map.")
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51
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52 (if text-mode-map
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53 ()
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54 (setq text-mode-map (make-sparse-keymap))
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55 ;; XEmacs change
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56 (set-keymap-name text-mode-map 'text-mode-map)
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57 (define-key text-mode-map "\e\t" 'ispell-complete-word)
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58 (define-key text-mode-map "\t" 'tab-to-tab-stop)
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59 (define-key text-mode-map "\es" 'center-line)
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60 (define-key text-mode-map "\eS" 'center-paragraph))
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61
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62
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63 ;(defun non-saved-text-mode ()
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64 ; "Like text-mode, but delete auto save file when file is saved for real."
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65 ; (text-mode)
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66 ; (make-local-variable 'delete-auto-save-files)
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67 ; (setq delete-auto-save-files t))
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68
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69 (defun text-mode ()
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70 "Major mode for editing text intended for humans to read.
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71 Special commands:
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72 \\{text-mode-map}
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73 Turning on Text mode calls the value of the variable `text-mode-hook',
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74 if that value is non-nil."
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75 (interactive)
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76 (kill-all-local-variables)
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77 (use-local-map text-mode-map)
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78 (setq mode-name "Text")
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79 (setq major-mode 'text-mode)
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80 (setq local-abbrev-table text-mode-abbrev-table)
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81 (set-syntax-table text-mode-syntax-table)
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82 (run-hooks 'text-mode-hook))
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83
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84 (defvar indented-text-mode-map ()
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85 "Keymap for Indented Text mode.
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86 All the commands defined in Text mode are inherited unless overridden.")
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87
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88 (if indented-text-mode-map
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89 ()
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90 ;; Make different definition for TAB before the one in text-mode-map, but
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91 ;; share the rest.
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92 ;; XEmacs change
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93 (setq indented-text-mode-map (make-sparse-keymap))
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94 (set-keymap-name indented-text-mode-map 'indented-text-mode-map)
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95 (set-keymap-parents indented-text-mode-map (list text-mode-map))
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96 (define-key indented-text-mode-map "\t" 'indent-relative))
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97
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98 (defun indented-text-mode ()
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99 "Major mode for editing text with indented paragraphs.
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100 In this mode, paragraphs are delimited only by blank lines.
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101 You can thus get the benefit of adaptive filling
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102 (see the variable `adaptive-fill-mode').
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103 \\{indented-text-mode-map}
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104 Turning on `indented-text-mode' calls the value of the variable
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105 `text-mode-hook', if that value is non-nil."
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106 (interactive)
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107 (kill-all-local-variables)
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108 (use-local-map text-mode-map)
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109 (define-abbrev-table 'text-mode-abbrev-table ())
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110 (setq local-abbrev-table text-mode-abbrev-table)
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111 (set-syntax-table text-mode-syntax-table)
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112 (make-local-variable 'indent-line-function)
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113 (setq indent-line-function 'indent-relative-maybe)
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114 (make-local-variable 'paragraph-start)
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115 (setq paragraph-start (concat "$\\|" page-delimiter))
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116 (make-local-variable 'paragraph-separate)
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117 (setq paragraph-separate paragraph-start)
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118 (use-local-map indented-text-mode-map)
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119 (setq mode-name "Indented Text")
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120 (setq major-mode 'indented-text-mode)
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121 (run-hooks 'text-mode-hook 'indented-text-mode-hook))
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122
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123 (defun center-paragraph ()
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124 "Center each nonblank line in the paragraph at or after point.
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125 See `center-line' for more info."
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126 (interactive)
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127 (save-excursion
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128 (forward-paragraph)
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129 (or (bolp) (newline 1))
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130 (let ((end (point)))
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131 (backward-paragraph)
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132 (center-region (point) end))))
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133
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134 (defun center-region (from to)
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135 "Center each nonblank line starting in the region.
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136 See `center-line' for more info."
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137 (interactive "r")
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138 (if (> from to)
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139 (let ((tem to))
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140 (setq to from from tem)))
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141 (save-excursion
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142 (save-restriction
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143 (narrow-to-region from to)
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144 (goto-char from)
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145 (while (not (eobp))
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146 (or (save-excursion (skip-chars-forward " \t") (eolp))
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147 (center-line))
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148 (forward-line 1)))))
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149
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150 (defun center-line (&optional nlines)
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151 "Center the line point is on, within the width specified by `fill-column'.
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152 This means adjusting the indentation so that it equals
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153 the distance between the end of the text and `fill-column'.
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154 The argument NLINES says how many lines to center."
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155 (interactive "P")
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156 (if nlines (setq nlines (prefix-numeric-value nlines)))
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157 (while (not (eq nlines 0))
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158 (save-excursion
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159 (let ((lm (current-left-margin))
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160 line-length)
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161 (beginning-of-line)
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162 (delete-horizontal-space)
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163 (end-of-line)
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164 (delete-horizontal-space)
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165 (setq line-length (current-column))
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166 (if (> (- fill-column lm line-length) 0)
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167 (indent-line-to
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168 (+ lm (/ (- fill-column lm line-length) 2))))))
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169 (cond ((null nlines)
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170 (setq nlines 0))
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171 ((> nlines 0)
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172 (setq nlines (1- nlines))
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173 (forward-line 1))
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174 ((< nlines 0)
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175 (setq nlines (1+ nlines))
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176 (forward-line -1)))))
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177
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178 ;;; text-mode.el ends here
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