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428
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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, 1997 Free Software Foundation, Inc.
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4
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5 ;; Maintainer: FSF
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6 ;; Keywords: wp, dumped
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7
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8 ;; This file is part of XEmacs.
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9
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10 ;; XEmacs is free software; you can redistribute it and/or modify it
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11 ;; under the terms of the GNU General Public License as published by
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12 ;; the Free Software Foundation; either version 2, or (at your option)
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13 ;; any later version.
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14
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15 ;; XEmacs is distributed in the hope that it will be useful, but
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16 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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18 ;; General Public License for more details.
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19
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20 ;; You should have received a copy of the GNU General Public License
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21 ;; along with XEmacs; see the file COPYING. If not, write to the Free
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22 ;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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23 ;; 02111-1307, USA.
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24
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25 ;;; Synched up with: FSF 20.2.
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26
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27 ;;; Commentary:
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28
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29 ;; This file is dumped with XEmacs.
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30
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31 ;; This package provides the fundamental text mode documented in the
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32 ;; Emacs user's manual.
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33
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34 ;;; Code:
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35
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36 (defvar text-mode-hook nil
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37 "Normal hook run when entering Text mode and many related modes.")
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38
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39 (defvar text-mode-variant nil
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40 "Non-nil if this buffer's major mode is a variant of Text mode.")
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41
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42 (defvar text-mode-syntax-table nil
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43 "Syntax table used while in text mode.")
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44
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45 (defvar text-mode-abbrev-table nil
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46 "Abbrev table used while in text mode.")
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47 (define-abbrev-table 'text-mode-abbrev-table ())
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48
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49 (if text-mode-syntax-table
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50 ()
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51 (setq text-mode-syntax-table (make-syntax-table))
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52 (modify-syntax-entry ?\" ". " text-mode-syntax-table)
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53 (modify-syntax-entry ?\\ ". " text-mode-syntax-table)
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54 (modify-syntax-entry ?' "w " text-mode-syntax-table))
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55
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56 (defvar text-mode-map nil
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57 "Keymap for Text mode.
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58 Many other modes, such as Mail mode, Outline mode and Indented Text mode,
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59 inherit all the commands defined in this map.")
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60
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61 (if text-mode-map
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62 ()
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63 (setq text-mode-map (make-sparse-keymap))
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64 ;; XEmacs change
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65 (set-keymap-name text-mode-map 'text-mode-map)
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66 (define-key text-mode-map "\e\t" 'ispell-complete-word)
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67 (define-key text-mode-map "\t" 'indent-relative)
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68 (define-key text-mode-map "\es" 'center-line)
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69 (define-key text-mode-map "\eS" 'center-paragraph))
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70
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71
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72 (defun text-mode ()
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73 "Major mode for editing text written for humans to read.
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74 In this mode, paragraphs are delimited only by blank or white lines.
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75 You can thus get the full benefit of adaptive filling
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76 (see the variable `adaptive-fill-mode').
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77 \\{text-mode-map}
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78 Turning on Text mode runs the normal hook `text-mode-hook'."
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79 (interactive)
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80 (kill-all-local-variables)
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81 (use-local-map text-mode-map)
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82 (setq local-abbrev-table text-mode-abbrev-table)
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83 (set-syntax-table text-mode-syntax-table)
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84 (make-local-variable 'paragraph-start)
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85 (setq paragraph-start (concat page-delimiter "\\|[ \t]*$"))
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86 (make-local-variable 'paragraph-separate)
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87 (setq paragraph-separate paragraph-start)
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88 (setq mode-name "Text")
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89 (setq major-mode 'text-mode)
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90 (run-hooks 'text-mode-hook))
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91
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92 (defun paragraph-indent-text-mode ()
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93 "Major mode for editing text, with leading spaces starting a paragraph.
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94 In this mode, you do not need blank lines between paragraphs
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95 when the first line of the following paragraph starts with whitespace.
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96 Special commands:
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97 \\{text-mode-map}
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98 Turning on Paragraph-Indent Text mode runs the normal hooks
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99 `text-mode-hook' and `paragraph-indent-text-mode-hook'."
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100 (interactive)
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101 (kill-all-local-variables)
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102 (use-local-map text-mode-map)
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103 (setq mode-name "Parindent")
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104 (setq major-mode 'paragraph-indent-text-mode)
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105 (setq local-abbrev-table text-mode-abbrev-table)
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106 (set-syntax-table text-mode-syntax-table)
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107 (run-hooks 'text-mode-hook 'paragraph-indent-text-mode-hook))
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108
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109 (defalias 'indented-text-mode 'text-mode)
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110
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111 (defun text-mode-hook-identify ()
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112 "Mark that this mode has run `text-mode-hook'.
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113 This is how `toggle-text-mode-auto-fill' knows which buffers to operate on."
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114 (make-local-variable 'text-mode-variant)
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115 (setq text-mode-variant t))
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116
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117 (add-hook 'text-mode-hook 'text-mode-hook-identify)
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118
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119 (defun toggle-text-mode-auto-fill ()
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120 "Toggle whether to use Auto Fill in Text mode and related modes.
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121 This command affects all buffers that use modes related to Text mode,
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122 both existing buffers and buffers that you subsequently create."
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123 (interactive)
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124 (let ((enable-mode (not (memq 'turn-on-auto-fill text-mode-hook)))
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125 (buffers (buffer-list)))
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126 (if enable-mode
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127 (add-hook 'text-mode-hook 'turn-on-auto-fill)
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128 (remove-hook 'text-mode-hook 'turn-on-auto-fill))
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129 (while buffers
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130 (with-current-buffer (car buffers)
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131 (if text-mode-variant
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132 (auto-fill-mode (if enable-mode 1 0))))
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133 (setq buffers (cdr buffers)))
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134 (message "Auto Fill %s in Text modes"
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135 (if enable-mode "enabled" "disabled"))))
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136
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137 (defun center-paragraph ()
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138 "Center each nonblank line in the paragraph at or after point.
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139 See `center-line' for more info."
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140 (interactive)
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141 (save-excursion
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142 (forward-paragraph)
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143 (or (bolp) (newline 1))
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144 (let ((end (point)))
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145 (backward-paragraph)
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146 (center-region (point) end))))
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147
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148 (defun center-region (from to)
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149 "Center each nonblank line starting in the region.
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150 See `center-line' for more info."
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151 (interactive "r")
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152 (if (> from to)
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153 (let ((tem to))
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154 (setq to from from tem)))
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155 (save-excursion
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156 (save-restriction
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157 (narrow-to-region from to)
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158 (goto-char from)
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159 (while (not (eobp))
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160 (or (save-excursion (skip-chars-forward " \t") (eolp))
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161 (center-line))
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162 (forward-line 1)))))
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163
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164 (defun center-line (&optional nlines)
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165 "Center the line point is on, within the width specified by `fill-column'.
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166 This means adjusting the indentation so that it equals
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167 the distance between the end of the text and `fill-column'.
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168 The argument NLINES says how many lines to center."
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169 (interactive "P")
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170 (if nlines (setq nlines (prefix-numeric-value nlines)))
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171 (while (not (eq nlines 0))
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172 (save-excursion
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173 (let ((lm (current-left-margin))
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174 line-length)
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175 (beginning-of-line)
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176 (delete-horizontal-space)
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177 (end-of-line)
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178 (delete-horizontal-space)
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179 (setq line-length (current-column))
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180 (if (> (- fill-column lm line-length) 0)
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181 (indent-line-to
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182 (+ lm (/ (- fill-column lm line-length) 2))))))
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183 (cond ((null nlines)
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184 (setq nlines 0))
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185 ((> nlines 0)
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186 (setq nlines (1- nlines))
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187 (forward-line 1))
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188 ((< nlines 0)
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189 (setq nlines (1+ nlines))
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190 (forward-line -1)))))
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191
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192 ;;; text-mode.el ends here
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