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1 ;;; highlight-headers.el --- highlighting message headers.
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2
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3 ;; Copyright (C) 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
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4 ;; Copyright (C) 1995 Tinker Systems
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5
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6 ;; Keywords: mail, news
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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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16
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21 ;; along with XEmacs; see the file COPYING. If not, write to the
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22 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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23 ;; Boston, MA 02111-1307, USA.
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24
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25 ;;; Synched up with: Not in FSF.
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26
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27 ;; This code is shared by RMAIL, VM, and GNUS.
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28 ;;
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29 ;; Faces:
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30 ;;
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31 ;; message-headers the part before the colon
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32 ;; message-header-contents the part after the colon
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33 ;; message-highlighted-header-contents contents of "special" headers
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34 ;; message-cited-text quoted text from other messages
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35 ;;
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36 ;; Variables:
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37 ;;
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38 ;; highlight-headers-regexp what makes a "special" header
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39 ;; highlight-headers-citation-regexp matches lines of quoted text
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40 ;; highlight-headers-citation-header-regexp matches headers for quoted text
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41
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116
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42 (defgroup highlight-headers nil
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43 "Fancify rfc822 documents."
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44 :group 'faces
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45 :group 'mail
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46 :group 'news)
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47
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116
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48 (defface message-headers '((t (:bold t)))
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49 "Face used for header part before colon."
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50 :group 'highlight-headers)
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51
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116
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52 (defface message-header-contents '((t (:italic t)))
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53 "Face used for header part after colon."
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54 :group 'highlight-headers)
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55
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56 (defface message-highlighted-header-contents '((t (:italic t :bold t)))
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57 "Face used for contents of \"special\" headers."
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58 :group 'highlight-headers)
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59
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116
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60 (defface message-cited-text '((t (:italic t)))
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61 "Face used for cited text."
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62 :group 'highlight-headers)
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63
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116
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64 (defface x-face '((t (:background "white" :foreground "black")))
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65 "Face used for X-Face icon."
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66 :group 'highlight-headers)
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67
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68 ;;(condition-case nil
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69 ;; (face-name 'message-addresses)
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70 ;; (wrong-type-argument
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71 ;; (make-face 'message-addresses)
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72 ;; (or (face-differs-from-default-p 'message-addresses)
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73 ;; (progn
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74 ;; (copy-face 'bold-italic 'message-addresses)
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75 ;; (set-face-underline-p 'message-addresses
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76 ;; (face-underline-p
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77 ;; 'message-highlighted-header-contents))))))
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78
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79 (defvar highlight-headers-regexp "Subject[ \t]*:"
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80 "*The headers whose contents should be emphasized more.
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81 The contents of these headers will be displayed in the face
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82 `message-highlighted-header-contents' instead of `message-header-contents'.")
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83
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84 (defvar highlight-headers-citation-regexp
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85 (concat "^\\("
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86 (mapconcat 'identity
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87 '("[ \t]*[a-zA-Z0-9_]+>+" ; supercite
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88 "[ \t]*[>]+" ; ">" with leading spaces
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89 "[]}<>|:]+[ \t]*" ; other chars, no leading space
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90 )
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91 "\\|")
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92 "\\)[ \t]*")
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93 "*The pattern to match cited text.
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94 Text in the body of a message which matches this will be displayed in
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95 the face `message-cited-text'.")
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96
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97 (defvar highlight-headers-citation-header-regexp
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98 (concat "^In article\\|^In message\\|"
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99 "^[^ \t].*\\(writes\\|wrote\\|said\\):\n"
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100 (substring highlight-headers-citation-regexp 1))
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101 "*The pattern to match the prolog of a cited block.
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102 Text in the body of a message which matches this will be displayed in
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103 the `message-headers' face.")
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104
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105 (defvar highlight-headers-highlight-citation-too nil
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106 "*Whether the whole citation line should go in the `mesage-cited-text' face.
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107 If nil, the text matched by `highlight-headers-citation-regexp' is in the
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108 default face, and the remainder of the line is in the message-cited-text face.")
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109
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110 (defvar highlight-headers-max-message-size 10000
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111 "*If the message body is larger than this many chars, don't highlight it.
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112 This is to prevent us from wasting time trying to fontify things like
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113 uuencoded files and large digests. If this is nil, all messages will
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114 be highlighted.")
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115
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116 (defvar highlight-headers-hack-x-face-p (featurep 'xface)
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117 "*If true, then the bitmap in an X-Face header will be displayed
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118 in the buffer. This assumes you have the `uncompface' and `icontopbm'
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119 programs on your path.")
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120
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121 (defvar highlight-headers-convert-quietly nil
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122 "*Non-nil inhibits the message that is normally displayed when external
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123 filters are used to convert an X-Face header. This has no affect if
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124 XEmacs is compiled with internal support for x-faces.")
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125
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126 (defvar highlight-headers-invert-x-face-data nil
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127 "*If true, causes the foreground and background bits in an X-Face
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128 header to be flipped before the image is displayed. If you use a
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129 light foreground color on a dark background color, you probably want
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130 to set this to t. This assumes that you have the `pnminvert' program
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131 on your path. This doesn't presently work with internal xface support.")
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132
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133
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134 ;;;###autoload
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135 (defun highlight-headers (start end hack-sig)
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136 "Highlight message headers between start and end.
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137 Faces used:
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138 message-headers the part before the colon
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139 message-header-contents the part after the colon
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140 message-highlighted-header-contents contents of \"special\" headers
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141 message-cited-text quoted text from other messages
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142
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143 Variables used:
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144
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145 highlight-headers-regexp what makes a \"special\" header
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146 highlight-headers-citation-regexp matches lines of quoted text
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147 highlight-headers-citation-header-regexp matches headers for quoted text
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148
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149 If HACK-SIG is true,then we search backward from END for something that
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150 looks like the beginning of a signature block, and don't consider that a
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151 part of the message (this is because signatures are often incorrectly
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152 interpreted as cited text.)"
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153 (if (< end start)
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154 (let ((s start)) (setq start end end s)))
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155 (let* ((too-big (and highlight-headers-max-message-size
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156 (> (- end start)
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157 highlight-headers-max-message-size)))
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158 (real-end end)
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159 e p hend)
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160 ;; delete previous highlighting
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161 (map-extents (function (lambda (extent ignore)
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162 (if (extent-property extent 'headers)
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163 (delete-extent extent))
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164 nil))
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165 (current-buffer) start end)
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166 (save-excursion
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167 (save-restriction
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168 (widen)
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169 ;; take off signature
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170 (if (and hack-sig (not too-big))
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171 (save-excursion
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172 (goto-char end)
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173 (if (re-search-backward "\n--+ *\n" start t)
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174 (if (eq (char-after (point)) ?\n)
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175 (setq end (1+ (point)))
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176 (setq end (point))))))
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177 (narrow-to-region start end)
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178
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179 (save-restriction
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180 ;; narrow down to just the headers...
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181 (goto-char start)
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182 ;; If this search fails then the narrowing performed above
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183 ;; is sufficient
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184 (if (re-search-forward "^$" nil t)
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185 (narrow-to-region (point-min) (point)))
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186 (goto-char start)
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187 (while (not (eobp))
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188 (cond
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189 ((looking-at "^\\([^ \t\n:]+[ \t]*:\\) *\\(.*\\(\n[ \t].*\\)*\n\\)")
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190 (setq hend (match-end 0))
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191 (setq e (make-extent (match-beginning 1) (match-end 1)))
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192 (set-extent-face e 'message-headers)
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193 (set-extent-property e 'headers t)
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194 (setq p (match-end 1))
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195 (cond
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196 ((and highlight-headers-hack-x-face-p
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197 (save-match-data (looking-at "^X-Face: *")))
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198 ;; make the whole header invisible
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199 (setq e (make-extent (match-beginning 0) (match-end 0)))
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200 (set-extent-property e 'invisible t)
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201 (set-extent-property e 'headers t)
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202 ;; now extract the xface and put it somewhere interesting
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203 (let ((xface (highlight-headers-x-face-to-pixmap
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204 (match-beginning 2)
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205 (match-end 2))))
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206 (if (not xface)
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207 nil ; just leave the header invisible if
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208 ; we can't convert the face for some
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209 ; reason
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210 (cond ((save-excursion
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211 (goto-char (point-min))
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212 (save-excursion (re-search-forward "^From: *"
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213 nil t)))
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214 (setq e (make-extent (match-end 0)
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215 (match-end 0))))
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216 (t
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217 ;; okay, make the beginning of the invisible
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218 ;; move forward to only hide the modem noise...
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219 (set-extent-endpoints e
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220 (match-beginning 2)
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221 (1- (match-end 2)))
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222 ;; kludge: if a zero-length extent exists at the
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223 ;; starting point of an invisible extent, then
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224 ;; it's invisible... even if the invisible extent
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225 ;; is start-open.
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226 (setq e (make-extent (1- (match-beginning 2))
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227 (match-beginning 2)))
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228 ))
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229 (set-extent-property e 'headers t)
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230 (set-extent-end-glyph e xface))
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231 ))
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232 ;;; I don't think this is worth the effort
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233 ;;; ((looking-at "\\(From\\|Resent-From\\)[ \t]*:")
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234 ;;; (setq current 'message-highlighted-header-contents)
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235 ;;; (goto-char (match-end 0))
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236 ;;; (or (looking-at ".*(\\(.*\\))")
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237 ;;; (looking-at "\\(.*\\)<")
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238 ;;; (looking-at "\\(.*\\)[@%]")
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239 ;;; (looking-at "\\(.*\\)"))
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240 ;;; (end-of-line)
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241 ;;; (setq e (make-extent p (match-beginning 1)))
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242 ;;; (set-extent-face e current)
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243 ;;; (set-extent-property e 'headers t)
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244 ;;; (setq e (make-extent (match-beginning 1) (match-end 1)))
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245 ;;; (set-extent-face e 'message-addresses)
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246 ;;; (set-extent-property e 'headers t)
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247 ;;; (setq e (make-extent (match-end 1) (point)))
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248 ;;; (set-extent-face e current)
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249 ;;; (set-extent-property e 'headers t)
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250 ;;; )
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251 ((and highlight-headers-regexp
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252 (save-match-data (looking-at highlight-headers-regexp)))
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253 (setq e (make-extent (match-beginning 2) (match-end 2)))
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254 (set-extent-face e 'message-highlighted-header-contents)
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255 (set-extent-property e 'headers t))
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256 (t
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257 (setq e (make-extent (match-beginning 2) (match-end 2)))
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258 (set-extent-face e 'message-header-contents)
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259 (set-extent-property e 'headers t))
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260 )
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261 (goto-char hend))
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262 ;; ignore non-header field name lines
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263 (t (forward-line 1)))))
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264
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265 ;; now do the body, unless it's too big....
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266 (if too-big
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267 nil
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268 (while (not (eobp))
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269 (cond ((null highlight-headers-citation-regexp)
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270 nil)
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271 ((looking-at highlight-headers-citation-regexp)
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272 (or highlight-headers-highlight-citation-too
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273 (goto-char (match-end 0)))
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274 (or (save-excursion
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275 (beginning-of-line)
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276 (let ((case-fold-search nil)) ; aaaaah, unix...
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277 (looking-at "^>From ")))
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278 (setq current 'message-cited-text)))
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279 ;;; ((or (looking-at "^In article\\|^In message")
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280 ;;; (looking-at
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281 ;;; "^[^ \t].*\\(writes\\|wrote\\|said\\):\n[ \t]+[A-Z]*[]}<>|]"))
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282 ;;; (setq current 'message-headers))
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283 ((null highlight-headers-citation-header-regexp)
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284 nil)
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285 ((looking-at highlight-headers-citation-header-regexp)
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286 (setq current 'message-headers))
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287 (t (setq current nil)))
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288 (cond (current
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289 (setq p (point))
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290 (forward-line 1) ; this is to put the \n in the face too
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291 (setq e (make-extent p (point)))
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292 (forward-char -1)
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293 (set-extent-face e current)
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294 (set-extent-property e 'headers t)
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295 ))
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296 (forward-line 1)))
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297 ))
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298 (save-excursion
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299 (save-restriction
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300 (widen)
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301 (narrow-to-region start real-end)
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302 (highlight-headers-mark-urls start real-end)))
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303 ))
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304
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305
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306 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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307 ;;;
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308 ;;; X-Face header conversion:
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309
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310 ;;; This cache is only used if x-face conversion is done with external
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311 ;;; filters. If XEmacs is compiled --with-xface, then it's better to
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312 ;;; convert it twice than to suck up memory for a potentially large cache of
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313 ;;; stuff that's not difficult to recreate.
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314 (defvar highlight-headers-x-face-to-pixmap-cache nil)
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315
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316 (defun highlight-headers-x-face-to-pixmap (start end)
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317 (let* ((string (if (stringp start) start (buffer-substring start end)))
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318 (data (assoc string highlight-headers-x-face-to-pixmap-cache)))
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319 (if (featurep 'xface)
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320 (let ((new-face (make-glyph (concat "X-Face: " string))))
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321 (set-glyph-face new-face 'x-face)
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322 new-face)
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323 ;; YUCK this is the old two-external-filters-plus-a-bunch-of-lisp method
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324 (if data
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325 (cdr data)
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326 (setq data (cons string
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327 (condition-case c
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328 (highlight-headers-parse-x-face-data start end)
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329 (error
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330 (display-error c nil)
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331 (sit-for 2)
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332 nil))))
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333 (setq highlight-headers-x-face-to-pixmap-cache
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334 (cons data highlight-headers-x-face-to-pixmap-cache))
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335 (cdr data)))
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336 ))
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337
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338 ;;; Kludge kludge kludge for displaying the bitmap in the X-Face header.
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339
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340 ;;; This depends on the following programs: icontopbm, from the pbmplus
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341 ;;; toolkit (available everywhere) and uncompface, which comes with
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342 ;;; several faces-related packages, and can also be had at ftp.clark.net
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343 ;;; in /pub/liebman/compface.tar.Z. See also xfaces 3.*. Not needed
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344 ;;; for this, but a very nice xbiff replacment.
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345
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346 (defconst highlight-headers-x-face-bitrev
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347 (purecopy
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348 (eval-when-compile
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349 (let* ((v (make-string 256 0))
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350 (i (1- (length v))))
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351 (while (>= i 0)
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352 (let ((j 7)
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353 (k 0))
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354 (while (>= j 0)
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355 (if (/= 0 (logand i (lsh 1 (- 7 j))))
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356 (setq k (logior k (lsh 1 j))))
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357 (setq j (1- j)))
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358 (aset v i k))
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359 (setq i (1- i)))
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360 v))))
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361
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362 (defun highlight-headers-parse-x-face-data (start end)
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363 (save-excursion
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364 (let ((b (current-buffer))
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365 (lines 0)
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366 p)
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367 (or highlight-headers-convert-quietly
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368 (message "Converting X-Face header to pixmap ..."))
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369 (set-buffer (get-buffer-create " *x-face-tmp*"))
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370 (buffer-disable-undo (current-buffer))
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371 (erase-buffer)
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372 (if (stringp start)
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373 (insert start)
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374 (insert-buffer-substring b start end))
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375 (while (search-forward "\n" nil t)
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376 (skip-chars-backward " \t\n")
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377 (setq p (point))
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378 (skip-chars-forward " \t\n")
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379 (delete-region p (point)))
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380 (call-process-region (point-min) (point-max) "uncompface" t t nil)
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381 (goto-char (point-min))
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382 (while (not (eobp))
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383 (or (looking-at "0x....,0x....,0x...., *$")
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384 (error "unexpected uncompface output"))
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385 (forward-line 1)
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386 (setq lines (1+ lines))
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387 (delete-char -1))
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388 (goto-char (point-min))
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389 (insert (format "/* Format_version=1, Width=%d, Height=%d" lines lines))
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390 (insert ", Depth=1, Valid_bits_per_item=16\n */\n")
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391 (while (not (eobp))
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392 (insert ?\t)
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393 (forward-char 56) ; 7 groups per line
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394 (insert ?\n))
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395 (forward-char -1)
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396 (delete-char -1) ; take off last comma
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397 ;;
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398 ;; Ok, now we've got the format that "icontopbm" knows about.
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399 (call-process-region (point-min) (point-max) "icontopbm" t t nil)
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400 ;; Invert the image if the user wants us to...
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401 (if highlight-headers-invert-x-face-data
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402 (call-process-region (point-min) (point-max) "pnminvert" t t nil))
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403 ;;
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404 ;; If PBM is using binary mode, we're winning.
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405 (goto-char (point-min))
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406 (let ((new-face))
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407 (cond ((looking-at "P4\n")
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408 (forward-line 2)
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409 (delete-region (point-min) (point))
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410 (while (not (eobp))
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411 (insert (aref highlight-headers-x-face-bitrev
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412 (following-char)))
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413 (delete-char 1))
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414 (setq new-face (make-glyph
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415 (vector 'xbm :data
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416 (list lines lines (prog1 (buffer-string)
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417 (erase-buffer))))))
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418 (set-glyph-image new-face "[xface]" 'global 'tty)
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419 (set-glyph-face new-face 'x-face))
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420 (t ; fix me
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421 (error "I only understand binary-format PBM...")))
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422 (or highlight-headers-convert-quietly
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423 (message "Converting X-Face header to pixmap ... done."))
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424 new-face)
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425 )))
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426
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427
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428 ;;; "The Internet's new BBS!" -Boardwatch Magazine
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429 ;;; URL support by jwz@netscape.com
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430
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431 (defvar highlight-headers-mark-urls (string-match "XEmacs" emacs-version)
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432 "*Whether to make URLs clickable in message bodies.")
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433
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434 (defvar highlight-headers-follow-url-function 'w3-fetch
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435 "The function to invoke to follow a URL.
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436 Possible values that work out of the box are:
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437
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438 'w3-fetch == Use emacs-w3
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439 'highlight-headers-follow-url-netscape == Use Netscape 1.1
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440 'highlight-headers-follow-url-mosaic == Use Mosaic")
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441
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442 (defvar highlight-headers-follow-url-netscape-auto-raise t
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443 "*Whether to make Netscape auto-raise when a URL is sent to it.")
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444
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445 (defvar highlight-headers-follow-url-netscape-new-window nil
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446 "*Whether to make Netscape create a new window when a URL is sent to it.")
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447
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448 ;;;###autoload
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|
449 (defun highlight-headers-follow-url-netscape (url)
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450 (message "Sending URL to Netscape...")
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451 (save-excursion
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452 (set-buffer (get-buffer-create "*Shell Command Output*"))
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|
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453 (erase-buffer)
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454 (if (equal
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455 0
|
|
|
456 (apply 'call-process "netscape" nil t nil
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|
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457 "-remote"
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|
|
458 (nconc
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|
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459 (and (not highlight-headers-follow-url-netscape-auto-raise)
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|
|
460 (list "-noraise"))
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|
|
461 (list
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|
|
462 (concat "openURL(" url
|
|
|
463 (if highlight-headers-follow-url-netscape-new-window
|
|
|
464 ",new-window)" ")"))))))
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|
|
465 ;; it worked
|
|
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466 nil
|
|
|
467 ;; it didn't work, so start a new Netscape process.
|
|
|
468 (call-process "netscape" nil 0 nil url)))
|
|
|
469 (message "Sending URL to Netscape... done"))
|
|
|
470
|
|
|
471 ;;;###autoload
|
|
|
472 (defun highlight-headers-follow-url-mosaic (url)
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|
|
473 (message "Sending URL to Mosaic...")
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|
|
474 (let ((pid-file "~/.mosaicpid")
|
|
|
475 (work-buffer " *mosaic work*")
|
|
|
476 (pid nil))
|
|
|
477 (cond ((file-readable-p pid-file)
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|
|
478 (set-buffer (get-buffer-create work-buffer))
|
|
|
479 (erase-buffer)
|
|
|
480 (insert-file-contents pid-file)
|
|
|
481 (setq pid (int-to-string (string-to-int (buffer-string))))
|
|
|
482 (erase-buffer)
|
|
|
483 (insert "goto" ?\n)
|
|
|
484 (insert url ?\n)
|
|
|
485 (write-region (point-min) (point-max)
|
|
|
486 (concat "/tmp/Mosaic." pid)
|
|
|
487 nil 0)
|
|
|
488 (set-buffer-modified-p nil)
|
|
|
489 (kill-buffer work-buffer)))
|
|
|
490 (cond ((or (null pid)
|
|
|
491 (not (equal 0 (call-process "kill" nil nil nil "-USR1" pid))))
|
|
|
492 (call-process "Mosaic" nil 0 nil url))))
|
|
|
493 (message "Sending URL to Mosaic... done"))
|
|
|
494
|
|
|
495 (defvar highlight-headers-url-keymap
|
|
|
496 (let ((m (make-sparse-keymap)))
|
|
|
497 (set-keymap-name m 'highlight-headers-url-keymap)
|
|
|
498 (if (string-match "XEmacs" emacs-version)
|
|
|
499 (progn
|
|
|
500 (define-key m 'button2 'highlight-headers-follow-url)
|
|
|
501 ))
|
|
|
502 m))
|
|
|
503
|
|
|
504 ;;;###autoload
|
|
|
505 (defun highlight-headers-follow-url (event)
|
|
|
506 (interactive "e")
|
|
|
507 (let* ((p (event-point event))
|
|
|
508 (buffer (window-buffer (event-window event)))
|
|
|
509 (extent (and p (extent-at p buffer 'highlight)))
|
|
|
510 (url (and extent
|
|
|
511 (save-excursion
|
|
|
512 (set-buffer buffer)
|
|
|
513 (buffer-substring (extent-start-position extent)
|
|
|
514 (extent-end-position extent))))))
|
|
|
515 (if (and url (string-match "\\`<\\([^>]+\\)>\\'" url))
|
|
|
516 (setq url (concat "news:"
|
|
|
517 (substring url (match-beginning 1) (match-end 1)))))
|
|
|
518 (if url
|
|
|
519 (funcall highlight-headers-follow-url-function url)
|
|
|
520 (beep))))
|
|
|
521
|
|
|
522
|
|
|
523 (defconst highlight-headers-url-pattern
|
|
|
524 (concat
|
|
|
525 "\\b\\(s?https?\\|ftp\\|file\\|gopher\\|s?news\\|telnet\\|mailbox\\):"
|
|
|
526 "\\(//[-a-zA-Z0-9_.]+:[0-9]*\\)?"
|
|
|
527 "[-a-zA-Z0-9_=?#$@~`%&*+|\\/.,]+"
|
|
|
528 ))
|
|
|
529
|
|
|
530 (defun highlight-headers-mark-urls (start end)
|
|
|
531 (cond
|
|
|
532 (highlight-headers-mark-urls
|
|
|
533 (save-excursion
|
|
|
534 (goto-char start)
|
|
|
535 (while (re-search-forward highlight-headers-url-pattern nil t)
|
|
|
536 (let ((s (match-beginning 0))
|
|
|
537 e
|
|
|
538 extent)
|
|
|
539 (goto-char (match-end 0))
|
|
|
540 ;(skip-chars-forward "^ \t\n\r")
|
|
|
541 (skip-chars-backward ".?#!*()")
|
|
|
542 (setq e (point))
|
|
|
543 (setq extent (make-extent s e))
|
|
|
544 (set-extent-face extent 'bold)
|
|
|
545 (set-extent-property extent 'highlight t)
|
|
|
546 (set-extent-property extent 'headers t)
|
|
|
547 (set-extent-property extent 'keymap highlight-headers-url-keymap)
|
|
|
548 ))
|
|
|
549
|
|
|
550 (goto-char start)
|
|
|
551 (while (re-search-forward "^Message-ID: \\(<[^>\n]+>\\)" nil t)
|
|
|
552 (let ((s (match-beginning 1))
|
|
|
553 (e (match-end 1))
|
|
|
554 extent)
|
|
|
555 (setq extent (make-extent s e))
|
|
|
556 (set-extent-face extent 'bold)
|
|
|
557 (set-extent-property extent 'highlight t)
|
|
|
558 (set-extent-property extent 'headers t)
|
|
|
559 (set-extent-property extent 'keymap highlight-headers-url-keymap)))
|
|
|
560 ))))
|
|
|
561
|
|
|
562
|
|
|
563 (provide 'highlight-headers)
|
