1 | ;;; richtext.el -- read and save files in text/richtext format |
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2 | |
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3 | ;; Copyright (C) 1995,1996,1997 Free Software Foundation, Inc. |
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4 | |
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5 | ;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp> |
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6 | ;; Created: 1995/7/15 |
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7 | ;; Version: $Id: richtext.el,v 1.1.1.1 2001/07/19 05:30:53 xtakei Exp $ |
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8 | ;; Keywords: wp, faces, MIME, multimedia |
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9 | |
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10 | ;; This file is not part of GNU Emacs yet. |
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11 | |
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12 | ;; This program is free software; you can redistribute it and/or |
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13 | ;; modify it under the terms of the GNU General Public License as |
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14 | ;; published by the Free Software Foundation; either version 2, or (at |
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15 | ;; your option) any later version. |
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16 | |
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17 | ;; This program is distributed in the hope that it will be useful, but |
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18 | ;; WITHOUT ANY WARRANTY; without even the implied warranty of |
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19 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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20 | ;; General Public License for more details. |
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21 | |
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22 | ;; You should have received a copy of the GNU General Public License |
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23 | ;; along with GNU Emacs; see the file COPYING. If not, write to the |
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24 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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25 | ;; Boston, MA 02111-1307, USA. |
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26 | |
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27 | ;;; Code: |
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28 | |
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29 | (require 'enriched) |
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30 | |
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31 | |
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32 | ;;; @ variables |
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33 | ;;; |
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34 | |
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35 | (defconst richtext-initial-annotation |
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36 | (lambda () |
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37 | (format "Content-Type: text/richtext\nText-Width: %d\n\n" |
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38 | (enriched-text-width))) |
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39 | "What to insert at the start of a text/richtext file. |
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40 | If this is a string, it is inserted. If it is a list, it should be a lambda |
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41 | expression, which is evaluated to get the string to insert.") |
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42 | |
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43 | (defconst richtext-annotation-regexp |
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44 | "[ \t\n]*\\(<\\(/\\)?\\([-A-za-z0-9]+\\)>\\)[ \t\n]*" |
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45 | "Regular expression matching richtext annotations.") |
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46 | |
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47 | (defconst richtext-translations |
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48 | '((face (bold-italic "bold" "italic") |
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49 | (bold "bold") |
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50 | (italic "italic") |
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51 | (underline "underline") |
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52 | (fixed "fixed") |
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53 | (excerpt "excerpt") |
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54 | (default ) |
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55 | (nil enriched-encode-other-face)) |
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56 | (invisible (t "comment")) |
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57 | (left-margin (4 "indent")) |
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58 | (right-margin (4 "indentright")) |
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59 | (justification (right "flushright") |
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60 | (left "flushleft") |
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61 | (full "flushboth") |
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62 | (center "center")) |
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63 | ;; The following are not part of the standard: |
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64 | (FUNCTION (enriched-decode-foreground "x-color") |
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65 | (enriched-decode-background "x-bg-color")) |
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66 | (read-only (t "x-read-only")) |
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67 | (unknown (nil format-annotate-value)) |
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68 | ; (font-size (2 "bigger") ; unimplemented |
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69 | ; (-2 "smaller")) |
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70 | ) |
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71 | "List of definitions of text/richtext annotations. |
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72 | See `format-annotate-region' and `format-deannotate-region' for the definition |
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73 | of this structure.") |
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74 | |
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75 | |
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76 | ;;; @ encoder |
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77 | ;;; |
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78 | |
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79 | ;;;###autoload |
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80 | (defun richtext-encode (from to) |
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81 | (if enriched-verbose (message "Richtext: encoding document...")) |
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82 | (save-restriction |
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83 | (narrow-to-region from to) |
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84 | (delete-to-left-margin) |
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85 | (unjustify-region) |
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86 | (goto-char from) |
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87 | (format-replace-strings '(("<" . "<lt>"))) |
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88 | (format-insert-annotations |
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89 | (format-annotate-region from (point-max) richtext-translations |
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90 | 'enriched-make-annotation enriched-ignore)) |
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91 | (goto-char from) |
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92 | (insert (if (stringp enriched-initial-annotation) |
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93 | richtext-initial-annotation |
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94 | (funcall richtext-initial-annotation))) |
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95 | (enriched-map-property-regions 'hard |
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96 | (lambda (v b e) |
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97 | (goto-char b) |
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98 | (if (eolp) |
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99 | (while (search-forward "\n" nil t) |
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100 | (replace-match "<nl>\n") |
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101 | ))) |
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102 | (point) nil) |
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103 | (if enriched-verbose (message nil)) |
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104 | ;; Return new end. |
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105 | (point-max))) |
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106 | |
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107 | |
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108 | ;;; @ decoder |
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109 | ;;; |
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110 | |
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111 | (defun richtext-next-annotation () |
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112 | "Find and return next text/richtext annotation. |
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113 | Return value is \(begin end name positive-p), or nil if none was found." |
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114 | (catch 'tag |
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115 | (while (re-search-forward richtext-annotation-regexp nil t) |
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116 | (let* ((beg0 (match-beginning 0)) |
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117 | (end0 (match-end 0)) |
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118 | (beg (match-beginning 1)) |
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119 | (end (match-end 1)) |
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120 | (name (downcase (buffer-substring |
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121 | (match-beginning 3) (match-end 3)))) |
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122 | (pos (not (match-beginning 2))) |
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123 | ) |
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124 | (cond ((equal name "lt") |
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125 | (delete-region beg end) |
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126 | (goto-char beg) |
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127 | (insert "<") |
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128 | ) |
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129 | ((equal name "comment") |
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130 | (if pos |
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131 | (throw 'tag (list beg0 end name pos)) |
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132 | (throw 'tag (list beg end0 name pos)) |
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133 | ) |
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134 | ) |
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135 | (t |
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136 | (throw 'tag (list beg end name pos)) |
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137 | )) |
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138 | )))) |
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139 | |
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140 | ;;;###autoload |
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141 | (defun richtext-decode (from to) |
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142 | (if enriched-verbose (message "Richtext: decoding document...")) |
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143 | (save-excursion |
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144 | (save-restriction |
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145 | (narrow-to-region from to) |
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146 | (goto-char from) |
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147 | (let ((file-width (enriched-get-file-width)) |
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148 | (use-hard-newlines t)) |
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149 | (enriched-remove-header) |
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150 | |
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151 | (goto-char from) |
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152 | (while (re-search-forward "\n\n+" nil t) |
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153 | (replace-match "\n") |
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154 | ) |
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155 | |
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156 | ;; Deal with newlines |
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157 | (goto-char from) |
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158 | (while (re-search-forward "[ \t\n]*<nl>[ \t\n]*" nil t) |
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159 | (replace-match "\n") |
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160 | (put-text-property (match-beginning 0) (point) 'hard t) |
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161 | (put-text-property (match-beginning 0) (point) 'front-sticky nil) |
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162 | ) |
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163 | |
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164 | ;; Translate annotations |
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165 | (format-deannotate-region from (point-max) richtext-translations |
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166 | 'richtext-next-annotation) |
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167 | |
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168 | ;; Fill paragraphs |
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169 | (if (and file-width ; possible reasons not to fill: |
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170 | (= file-width (enriched-text-width))) ; correct wd. |
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171 | ;; Minimally, we have to insert indentation and justification. |
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172 | (enriched-insert-indentation) |
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173 | (if enriched-verbose (message "Filling paragraphs...")) |
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174 | (fill-region (point-min) (point-max)))) |
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175 | (if enriched-verbose (message nil)) |
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176 | (point-max)))) |
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177 | |
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178 | |
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179 | ;;; @ end |
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180 | ;;; |
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181 | |
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182 | (require 'product) |
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183 | (product-provide (provide 'richtext) (require 'apel-ver)) |
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184 | |
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185 | ;;; richtext.el ends here |
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