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1 ;;; gnus-cite.el --- parse citations in articles for Gnus
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2 ;; Copyright (C) 1995,96,97 Free Software Foundation, Inc.
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3
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4 ;; Author: Per Abrahamsen <abraham@iesd.auc.dk>
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5 ;; Keywords: news, mail
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6
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7 ;; This file is part of GNU Emacs.
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8
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9 ;; GNU Emacs is free software; you can redistribute it and/or modify
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10 ;; it 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 ;; GNU Emacs is distributed in the hope that it will be useful,
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15 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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17 ;; GNU 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 GNU Emacs; see the file COPYING. If not, write to the
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21 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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22 ;; Boston, MA 02111-1307, USA.
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23
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24 ;;; Commentary:
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25
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26 ;;; Code:
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27
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28 (require 'gnus)
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29 (require 'gnus-art)
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30 (require 'gnus-range)
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31
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32 ;;; Customization:
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33
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34 (defgroup gnus-cite nil
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35 "Citation."
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36 :prefix "gnus-cite-"
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37 :link '(custom-manual "(gnus)Article Highlighting")
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38 :group 'gnus-article)
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39
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40 (defcustom gnus-cite-reply-regexp
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41 "^\\(Subject: Re\\|In-Reply-To\\|References\\):"
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42 "If headers match this regexp it is reasonable to believe that
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43 article has citations."
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44 :group 'gnus-cite
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45 :type 'string)
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46
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47 (defcustom gnus-cite-always-check nil
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48 "Check article always for citations. Set it t to check all articles."
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49 :group 'gnus-cite
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50 :type '(choice (const :tag "no" nil)
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51 (const :tag "yes" t)))
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52
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53 (defcustom gnus-cited-text-button-line-format "%(%{[...]%}%)\n"
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54 "Format of cited text buttons."
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55 :group 'gnus-cite
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56 :type 'string)
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57
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58 (defcustom gnus-cited-lines-visible nil
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59 "The number of lines of hidden cited text to remain visible."
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60 :group 'gnus-cite
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61 :type '(choice (const :tag "none" nil)
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62 integer))
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63
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64 (defcustom gnus-cite-parse-max-size 25000
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65 "Maximum article size (in bytes) where parsing citations is allowed.
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66 Set it to nil to parse all articles."
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67 :group 'gnus-cite
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68 :type '(choice (const :tag "all" nil)
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69 integer))
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70
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71 (defcustom gnus-cite-prefix-regexp
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72 "^[]>|:}+ ]*[]>|:}+]\\(.*>\\)?\\|^.*>"
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73 "Regexp matching the longest possible citation prefix on a line."
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74 :group 'gnus-cite
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75 :type 'regexp)
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76
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77 (defcustom gnus-cite-max-prefix 20
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78 "Maximum possible length for a citation prefix."
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79 :group 'gnus-cite
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80 :type 'integer)
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81
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82 (defcustom gnus-supercite-regexp
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83 (concat "^\\(" gnus-cite-prefix-regexp "\\)? *"
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84 ">>>>> +\"\\([^\"\n]+\\)\" +==")
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85 "Regexp matching normal Supercite attribution lines.
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86 The first grouping must match prefixes added by other packages."
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87 :group 'gnus-cite
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88 :type 'regexp)
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89
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90 (defcustom gnus-supercite-secondary-regexp "^.*\"\\([^\"\n]+\\)\" +=="
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91 "Regexp matching mangled Supercite attribution lines.
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92 The first regexp group should match the Supercite attribution."
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93 :group 'gnus-cite
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94 :type 'regexp)
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95
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96 (defcustom gnus-cite-minimum-match-count 2
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97 "Minimum number of identical prefixes before we believe it's a citation."
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98 :group 'gnus-cite
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99 :type 'integer)
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100
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101 (defcustom gnus-cite-attribution-prefix
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102 "in article\\|in <\\|On \\(Mon\\|Tue\\|Wed\\|Thu\\|Fri\\|Sat\\|Sun\\),"
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103 "Regexp matching the beginning of an attribution line."
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104 :group 'gnus-cite
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105 :type 'regexp)
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106
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107 (defcustom gnus-cite-attribution-suffix
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108 "\\(\\(wrote\\|writes\\|said\\|says\\|>\\)\\(:\\|\\.\\.\\.\\)\\)[ ]*$"
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109 "Regexp matching the end of an attribution line.
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110 The text matching the first grouping will be used as a button."
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111 :group 'gnus-cite
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112 :type 'regexp)
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113
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108
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114 (defface gnus-cite-attribution-face '((t
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115 (:underline t)))
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116 "Face used for attribution lines.")
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117
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118 (defcustom gnus-cite-attribution-face 'gnus-cite-attribution-face
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119 "Face used for attribution lines.
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120 It is merged with the face for the cited text belonging to the attribution."
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121 :group 'gnus-cite
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122 :type 'face)
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123
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124 (defface gnus-cite-face-1 '((((class color)
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125 (background dark))
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126 (:foreground "light blue"))
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127 (((class color)
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128 (background light))
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129 (:foreground "MidnightBlue"))
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108
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130 (t
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131 (:italic t)))
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132 "Citation face.")
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133
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134 (defface gnus-cite-face-2 '((((class color)
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135 (background dark))
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136 (:foreground "light cyan"))
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137 (((class color)
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138 (background light))
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139 (:foreground "firebrick"))
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108
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140 (t
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141 (:italic t)))
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142 "Citation face.")
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143
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144 (defface gnus-cite-face-3 '((((class color)
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145 (background dark))
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146 (:foreground "light yellow"))
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147 (((class color)
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148 (background light))
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149 (:foreground "dark green"))
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108
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150 (t
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151 (:italic t)))
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152 "Citation face.")
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153
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154 (defface gnus-cite-face-4 '((((class color)
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155 (background dark))
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156 (:foreground "light pink"))
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157 (((class color)
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158 (background light))
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159 (:foreground "OrangeRed"))
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108
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160 (t
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161 (:italic t)))
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162 "Citation face.")
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163
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164 (defface gnus-cite-face-5 '((((class color)
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165 (background dark))
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166 (:foreground "pale green"))
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167 (((class color)
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168 (background light))
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169 (:foreground "dark khaki"))
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170 (t
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171 (:italic t)))
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172 "Citation face.")
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173
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174 (defface gnus-cite-face-6 '((((class color)
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175 (background dark))
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176 (:foreground "beige"))
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177 (((class color)
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178 (background light))
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179 (:foreground "dark violet"))
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180 (t
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181 (:italic t)))
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182 "Citation face.")
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183
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184 (defface gnus-cite-face-7 '((((class color)
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185 (background dark))
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186 (:foreground "orange"))
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187 (((class color)
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188 (background light))
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189 (:foreground "SteelBlue4"))
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190 (t
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191 (:italic t)))
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192 "Citation face.")
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193
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194 (defface gnus-cite-face-8 '((((class color)
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195 (background dark))
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196 (:foreground "magenta"))
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197 (((class color)
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198 (background light))
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199 (:foreground "magenta"))
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200 (t
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201 (:italic t)))
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202 "Citation face.")
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203
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204 (defface gnus-cite-face-9 '((((class color)
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205 (background dark))
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206 (:foreground "violet"))
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207 (((class color)
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208 (background light))
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209 (:foreground "violet"))
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210 (t
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211 (:italic t)))
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212 "Citation face.")
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213
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214 (defface gnus-cite-face-10 '((((class color)
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215 (background dark))
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216 (:foreground "medium purple"))
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217 (((class color)
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218 (background light))
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219 (:foreground "medium purple"))
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220 (t
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221 (:italic t)))
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222 "Citation face.")
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223
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224 (defface gnus-cite-face-11 '((((class color)
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225 (background dark))
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226 (:foreground "turquoise"))
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227 (((class color)
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228 (background light))
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229 (:foreground "turquoise"))
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230 (t
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231 (:italic t)))
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232 "Citation face.")
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233
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234 (defcustom gnus-cite-face-list
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235 '(gnus-cite-face-1 gnus-cite-face-2 gnus-cite-face-3 gnus-cite-face-4
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236 gnus-cite-face-5 gnus-cite-face-6 gnus-cite-face-7 gnus-cite-face-8
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237 gnus-cite-face-9 gnus-cite-face-10 gnus-cite-face-11)
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238 "List of faces used for highlighting citations.
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239
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240 When there are citations from multiple articles in the same message,
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241 Gnus will try to give each citation from each article its own face.
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242 This should make it easier to see who wrote what."
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243 :group 'gnus-cite
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244 :type '(repeat face))
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245
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246 (defcustom gnus-cite-hide-percentage 50
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247 "Only hide excess citation if above this percentage of the body."
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248 :group 'gnus-cite
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249 :type 'number)
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250
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251 (defcustom gnus-cite-hide-absolute 10
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252 "Only hide excess citation if above this number of lines in the body."
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253 :group 'gnus-cite
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254 :type 'integer)
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255
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256 ;;; Internal Variables:
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257
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258 (defvar gnus-cite-article nil)
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259
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260 (defvar gnus-cite-prefix-alist nil)
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261 ;; Alist of citation prefixes.
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262 ;; The cdr is a list of lines with that prefix.
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263
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264 (defvar gnus-cite-attribution-alist nil)
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265 ;; Alist of attribution lines.
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266 ;; The car is a line number.
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267 ;; The cdr is the prefix for the citation started by that line.
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268
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269 (defvar gnus-cite-loose-prefix-alist nil)
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270 ;; Alist of citation prefixes that have no matching attribution.
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271 ;; The cdr is a list of lines with that prefix.
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272
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273 (defvar gnus-cite-loose-attribution-alist nil)
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274 ;; Alist of attribution lines that have no matching citation.
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275 ;; Each member has the form (WROTE IN PREFIX TAG), where
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276 ;; WROTE: is the attribution line number
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277 ;; IN: is the line number of the previous line if part of the same attribution,
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278 ;; PREFIX: Is the citation prefix of the attribution line(s), and
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279 ;; TAG: Is a Supercite tag, if any.
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280
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281 (defvar gnus-cited-text-button-line-format-alist
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282 `((?b (marker-position beg) ?d)
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283 (?e (marker-position end) ?d)
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284 (?l (- end beg) ?d)))
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285 (defvar gnus-cited-text-button-line-format-spec nil)
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286
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287 ;;; Commands:
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288
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289 (defun gnus-article-highlight-citation (&optional force)
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290 "Highlight cited text.
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291 Each citation in the article will be highlighted with a different face.
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292 The faces are taken from `gnus-cite-face-list'.
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293 Attribution lines are highlighted with the same face as the
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294 corresponding citation merged with `gnus-cite-attribution-face'.
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295
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296 Text is considered cited if at least `gnus-cite-minimum-match-count'
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297 lines matches `gnus-cite-prefix-regexp' with the same prefix.
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298
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299 Lines matching `gnus-cite-attribution-suffix' and perhaps
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300 `gnus-cite-attribution-prefix' are considered attribution lines."
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301 (interactive (list 'force))
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302 (save-excursion
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303 (set-buffer gnus-article-buffer)
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304 (gnus-cite-parse-maybe force)
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305 (let ((buffer-read-only nil)
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306 (alist gnus-cite-prefix-alist)
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307 (faces gnus-cite-face-list)
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308 (inhibit-point-motion-hooks t)
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309 face entry prefix skip numbers number face-alist)
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310 ;; Loop through citation prefixes.
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311 (while alist
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312 (setq entry (car alist)
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313 alist (cdr alist)
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314 prefix (car entry)
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315 numbers (cdr entry)
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316 face (car faces)
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317 faces (or (cdr faces) gnus-cite-face-list)
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318 face-alist (cons (cons prefix face) face-alist))
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319 (while numbers
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320 (setq number (car numbers)
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321 numbers (cdr numbers))
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322 (and (not (assq number gnus-cite-attribution-alist))
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323 (not (assq number gnus-cite-loose-attribution-alist))
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324 (gnus-cite-add-face number prefix face))))
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325 ;; Loop through attribution lines.
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326 (setq alist gnus-cite-attribution-alist)
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327 (while alist
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328 (setq entry (car alist)
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329 alist (cdr alist)
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330 number (car entry)
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331 prefix (cdr entry)
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332 skip (gnus-cite-find-prefix number)
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333 face (cdr (assoc prefix face-alist)))
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334 ;; Add attribution button.
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335 (goto-line number)
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108
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336 (when (re-search-forward gnus-cite-attribution-suffix
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337 (save-excursion (end-of-line 1) (point))
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338 t)
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339 (gnus-article-add-button (match-beginning 1) (match-end 1)
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340 'gnus-cite-toggle prefix))
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341 ;; Highlight attribution line.
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342 (gnus-cite-add-face number skip face)
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343 (gnus-cite-add-face number skip gnus-cite-attribution-face))
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344 ;; Loop through attribution lines.
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345 (setq alist gnus-cite-loose-attribution-alist)
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346 (while alist
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347 (setq entry (car alist)
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348 alist (cdr alist)
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349 number (car entry)
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350 skip (gnus-cite-find-prefix number))
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351 (gnus-cite-add-face number skip gnus-cite-attribution-face)))))
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352
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353 (defun gnus-dissect-cited-text ()
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354 "Dissect the article buffer looking for cited text."
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355 (save-excursion
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356 (set-buffer gnus-article-buffer)
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357 (gnus-cite-parse-maybe)
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358 (let ((alist gnus-cite-prefix-alist)
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359 prefix numbers number marks m)
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360 ;; Loop through citation prefixes.
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361 (while alist
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362 (setq numbers (pop alist)
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363 prefix (pop numbers))
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364 (while numbers
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365 (setq number (pop numbers))
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366 (goto-char (point-min))
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367 (forward-line number)
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368 (push (cons (point-marker) "") marks)
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369 (while (and numbers
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370 (= (1- number) (car numbers)))
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371 (setq number (pop numbers)))
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372 (goto-char (point-min))
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373 (forward-line (1- number))
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374 (push (cons (point-marker) prefix) marks)))
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375 ;; Skip to the beginning of the body.
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376 (goto-char (point-min))
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377 (search-forward "\n\n" nil t)
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378 (push (cons (point-marker) "") marks)
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98
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379 ;; Find the end of the body.
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380 (goto-char (point-max))
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381 (gnus-article-search-signature)
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382 (push (cons (point-marker) "") marks)
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98
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383 ;; Sort the marks.
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384 (setq marks (sort marks (lambda (m1 m2) (< (car m1) (car m2)))))
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98
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385 (let ((omarks marks))
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386 (setq marks nil)
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387 (while (cdr omarks)
|
|
|
388 (if (= (caar omarks) (caadr omarks))
|
|
|
389 (progn
|
|
|
390 (unless (equal (cdar omarks) "")
|
|
|
391 (push (car omarks) marks))
|
|
|
392 (unless (equal (cdadr omarks) "")
|
|
|
393 (push (cadr omarks) marks))
|
|
98
|
394 (unless (and (equal (cdar omarks) "")
|
|
|
395 (equal (cdadr omarks) "")
|
|
|
396 (not (cddr omarks)))
|
|
|
397 (setq omarks (cdr omarks))))
|
|
0
|
398 (push (car omarks) marks))
|
|
|
399 (setq omarks (cdr omarks)))
|
|
|
400 (when (car omarks)
|
|
|
401 (push (car omarks) marks))
|
|
|
402 (setq marks (setq m (nreverse marks)))
|
|
|
403 (while (cddr m)
|
|
|
404 (if (and (equal (cdadr m) "")
|
|
|
405 (equal (cdar m) (cdaddr m))
|
|
|
406 (goto-char (caadr m))
|
|
|
407 (forward-line 1)
|
|
|
408 (= (point) (caaddr m)))
|
|
|
409 (setcdr m (cdddr m))
|
|
|
410 (setq m (cdr m))))
|
|
|
411 marks))))
|
|
|
412
|
|
98
|
413 (defun gnus-article-fill-cited-article (&optional force width)
|
|
|
414 "Do word wrapping in the current article.
|
|
|
415 If WIDTH (the numerical prefix), use that text width when filling."
|
|
|
416 (interactive (list t current-prefix-arg))
|
|
0
|
417 (save-excursion
|
|
|
418 (set-buffer gnus-article-buffer)
|
|
|
419 (let ((buffer-read-only nil)
|
|
|
420 (inhibit-point-motion-hooks t)
|
|
|
421 (marks (gnus-dissect-cited-text))
|
|
98
|
422 (adaptive-fill-mode nil)
|
|
104
|
423 (filladapt-mode nil)
|
|
98
|
424 (fill-column (if width (prefix-numeric-value width) fill-column)))
|
|
0
|
425 (save-restriction
|
|
|
426 (while (cdr marks)
|
|
|
427 (widen)
|
|
|
428 (narrow-to-region (caar marks) (caadr marks))
|
|
|
429 (let ((adaptive-fill-regexp
|
|
|
430 (concat "^" (regexp-quote (cdar marks)) " *"))
|
|
|
431 (fill-prefix (cdar marks)))
|
|
|
432 (fill-region (point-min) (point-max)))
|
|
|
433 (set-marker (caar marks) nil)
|
|
|
434 (setq marks (cdr marks)))
|
|
|
435 (when marks
|
|
98
|
436 (set-marker (caar marks) nil))
|
|
|
437 ;; All this information is now incorrect.
|
|
|
438 (setq gnus-cite-prefix-alist nil
|
|
|
439 gnus-cite-attribution-alist nil
|
|
|
440 gnus-cite-loose-prefix-alist nil
|
|
153
|
441 gnus-cite-loose-attribution-alist nil
|
|
|
442 gnus-cite-article nil)))))
|
|
0
|
443
|
|
|
444 (defun gnus-article-hide-citation (&optional arg force)
|
|
|
445 "Toggle hiding of all cited text except attribution lines.
|
|
|
446 See the documentation for `gnus-article-highlight-citation'.
|
|
|
447 If given a negative prefix, always show; if given a positive prefix,
|
|
|
448 always hide."
|
|
98
|
449 (interactive (append (gnus-article-hidden-arg) (list 'force)))
|
|
108
|
450 (setq gnus-cited-text-button-line-format-spec
|
|
|
451 (gnus-parse-format gnus-cited-text-button-line-format
|
|
0
|
452 gnus-cited-text-button-line-format-alist t))
|
|
98
|
453 (save-excursion
|
|
|
454 (set-buffer gnus-article-buffer)
|
|
|
455 (cond
|
|
|
456 ((gnus-article-check-hidden-text 'cite arg)
|
|
|
457 t)
|
|
|
458 ((gnus-article-text-type-exists-p 'cite)
|
|
|
459 (let ((buffer-read-only nil))
|
|
|
460 (gnus-article-hide-text-of-type 'cite)))
|
|
|
461 (t
|
|
0
|
462 (let ((buffer-read-only nil)
|
|
|
463 (marks (gnus-dissect-cited-text))
|
|
|
464 (inhibit-point-motion-hooks t)
|
|
98
|
465 (props (nconc (list 'article-type 'cite)
|
|
0
|
466 gnus-hidden-properties))
|
|
|
467 beg end)
|
|
|
468 (while marks
|
|
|
469 (setq beg nil
|
|
|
470 end nil)
|
|
|
471 (while (and marks (string= (cdar marks) ""))
|
|
|
472 (setq marks (cdr marks)))
|
|
108
|
473 (when marks
|
|
0
|
474 (setq beg (caar marks)))
|
|
|
475 (while (and marks (not (string= (cdar marks) "")))
|
|
|
476 (setq marks (cdr marks)))
|
|
|
477 (when marks
|
|
|
478 (setq end (caar marks)))
|
|
|
479 ;; Skip past lines we want to leave visible.
|
|
|
480 (when (and beg end gnus-cited-lines-visible)
|
|
|
481 (goto-char beg)
|
|
|
482 (forward-line gnus-cited-lines-visible)
|
|
|
483 (if (>= (point) end)
|
|
|
484 (setq beg nil)
|
|
|
485 (setq beg (point-marker))))
|
|
|
486 (when (and beg end)
|
|
|
487 (gnus-add-text-properties beg end props)
|
|
|
488 (goto-char beg)
|
|
|
489 (unless (save-excursion (search-backward "\n\n" nil t))
|
|
|
490 (insert "\n"))
|
|
98
|
491 (put-text-property
|
|
0
|
492 (point)
|
|
98
|
493 (progn
|
|
|
494 (gnus-article-add-button
|
|
|
495 (point)
|
|
|
496 (progn (eval gnus-cited-text-button-line-format-spec) (point))
|
|
|
497 `gnus-article-toggle-cited-text (cons beg end))
|
|
|
498 (point))
|
|
|
499 'article-type 'annotation)
|
|
|
500 (set-marker beg (point)))))))))
|
|
0
|
501
|
|
|
502 (defun gnus-article-toggle-cited-text (region)
|
|
|
503 "Toggle hiding the text in REGION."
|
|
|
504 (let (buffer-read-only)
|
|
|
505 (funcall
|
|
|
506 (if (text-property-any
|
|
|
507 (car region) (1- (cdr region))
|
|
|
508 (car gnus-hidden-properties) (cadr gnus-hidden-properties))
|
|
|
509 'remove-text-properties 'gnus-add-text-properties)
|
|
|
510 (car region) (cdr region) gnus-hidden-properties)))
|
|
|
511
|
|
|
512 (defun gnus-article-hide-citation-maybe (&optional arg force)
|
|
|
513 "Toggle hiding of cited text that has an attribution line.
|
|
|
514 If given a negative prefix, always show; if given a positive prefix,
|
|
|
515 always hide.
|
|
|
516 This will do nothing unless at least `gnus-cite-hide-percentage'
|
|
|
517 percent and at least `gnus-cite-hide-absolute' lines of the body is
|
|
|
518 cited text with attributions. When called interactively, these two
|
|
|
519 variables are ignored.
|
|
|
520 See also the documentation for `gnus-article-highlight-citation'."
|
|
98
|
521 (interactive (append (gnus-article-hidden-arg) (list 'force)))
|
|
0
|
522 (unless (gnus-article-check-hidden-text 'cite arg)
|
|
|
523 (save-excursion
|
|
|
524 (set-buffer gnus-article-buffer)
|
|
|
525 (gnus-cite-parse-maybe force)
|
|
|
526 (goto-char (point-min))
|
|
|
527 (search-forward "\n\n" nil t)
|
|
|
528 (let ((start (point))
|
|
|
529 (atts gnus-cite-attribution-alist)
|
|
|
530 (buffer-read-only nil)
|
|
|
531 (inhibit-point-motion-hooks t)
|
|
|
532 (hiden 0)
|
|
|
533 total)
|
|
|
534 (goto-char (point-max))
|
|
98
|
535 (gnus-article-search-signature)
|
|
0
|
536 (setq total (count-lines start (point)))
|
|
|
537 (while atts
|
|
|
538 (setq hiden (+ hiden (length (cdr (assoc (cdar atts)
|
|
|
539 gnus-cite-prefix-alist))))
|
|
|
540 atts (cdr atts)))
|
|
98
|
541 (when (or force
|
|
|
542 (and (> (* 100 hiden) (* gnus-cite-hide-percentage total))
|
|
|
543 (> hiden gnus-cite-hide-absolute)))
|
|
|
544 (setq atts gnus-cite-attribution-alist)
|
|
|
545 (while atts
|
|
|
546 (setq total (cdr (assoc (cdar atts) gnus-cite-prefix-alist))
|
|
|
547 atts (cdr atts))
|
|
|
548 (while total
|
|
|
549 (setq hiden (car total)
|
|
|
550 total (cdr total))
|
|
|
551 (goto-line hiden)
|
|
|
552 (unless (assq hiden gnus-cite-attribution-alist)
|
|
108
|
553 (gnus-add-text-properties
|
|
98
|
554 (point) (progn (forward-line 1) (point))
|
|
|
555 (nconc (list 'article-type 'cite)
|
|
|
556 gnus-hidden-properties))))))))))
|
|
0
|
557
|
|
|
558 (defun gnus-article-hide-citation-in-followups ()
|
|
|
559 "Hide cited text in non-root articles."
|
|
|
560 (interactive)
|
|
|
561 (save-excursion
|
|
|
562 (set-buffer gnus-article-buffer)
|
|
|
563 (let ((article (cdr gnus-article-current)))
|
|
|
564 (unless (save-excursion
|
|
|
565 (set-buffer gnus-summary-buffer)
|
|
|
566 (gnus-article-displayed-root-p article))
|
|
|
567 (gnus-article-hide-citation)))))
|
|
|
568
|
|
|
569 ;;; Internal functions:
|
|
|
570
|
|
|
571 (defun gnus-cite-parse-maybe (&optional force)
|
|
|
572 ;; Parse if the buffer has changes since last time.
|
|
|
573 (if (equal gnus-cite-article gnus-article-current)
|
|
|
574 ()
|
|
|
575 ;;Reset parser information.
|
|
|
576 (setq gnus-cite-prefix-alist nil
|
|
|
577 gnus-cite-attribution-alist nil
|
|
|
578 gnus-cite-loose-prefix-alist nil
|
|
|
579 gnus-cite-loose-attribution-alist nil)
|
|
|
580 ;; Parse if not too large.
|
|
98
|
581 (if (and (not force)
|
|
0
|
582 gnus-cite-parse-max-size
|
|
|
583 (> (buffer-size) gnus-cite-parse-max-size))
|
|
|
584 ()
|
|
|
585 (setq gnus-cite-article (cons (car gnus-article-current)
|
|
|
586 (cdr gnus-article-current)))
|
|
98
|
587 (gnus-cite-parse-wrapper))))
|
|
|
588
|
|
|
589 (defun gnus-cite-parse-wrapper ()
|
|
|
590 ;; Wrap chopped gnus-cite-parse
|
|
|
591 (goto-char (point-min))
|
|
|
592 (unless (search-forward "\n\n" nil t)
|
|
|
593 (goto-char (point-max)))
|
|
108
|
594 (save-excursion
|
|
98
|
595 (gnus-cite-parse-attributions))
|
|
|
596 ;; Try to avoid check citation if there is no reason to believe
|
|
|
597 ;; that article has citations
|
|
|
598 (if (or gnus-cite-always-check
|
|
|
599 (save-excursion
|
|
|
600 (re-search-backward gnus-cite-reply-regexp nil t))
|
|
|
601 gnus-cite-loose-attribution-alist)
|
|
|
602 (progn (save-excursion
|
|
|
603 (gnus-cite-parse))
|
|
|
604 (save-excursion
|
|
|
605 (gnus-cite-connect-attributions)))))
|
|
0
|
606
|
|
|
607 (defun gnus-cite-parse ()
|
|
|
608 ;; Parse and connect citation prefixes and attribution lines.
|
|
108
|
609
|
|
0
|
610 ;; Parse current buffer searching for citation prefixes.
|
|
|
611 (let ((line (1+ (count-lines (point-min) (point))))
|
|
|
612 (case-fold-search t)
|
|
|
613 (max (save-excursion
|
|
|
614 (goto-char (point-max))
|
|
98
|
615 (gnus-article-search-signature)
|
|
0
|
616 (point)))
|
|
|
617 alist entry start begin end numbers prefix)
|
|
|
618 ;; Get all potential prefixes in `alist'.
|
|
|
619 (while (< (point) max)
|
|
|
620 ;; Each line.
|
|
|
621 (setq begin (point)
|
|
|
622 end (progn (beginning-of-line 2) (point))
|
|
|
623 start end)
|
|
|
624 (goto-char begin)
|
|
|
625 ;; Ignore standard Supercite attribution prefix.
|
|
98
|
626 (when (looking-at gnus-supercite-regexp)
|
|
|
627 (if (match-end 1)
|
|
|
628 (setq end (1+ (match-end 1)))
|
|
|
629 (setq end (1+ begin))))
|
|
0
|
630 ;; Ignore very long prefixes.
|
|
98
|
631 (when (> end (+ (point) gnus-cite-max-prefix))
|
|
|
632 (setq end (+ (point) gnus-cite-max-prefix)))
|
|
0
|
633 (while (re-search-forward gnus-cite-prefix-regexp (1- end) t)
|
|
|
634 ;; Each prefix.
|
|
|
635 (setq end (match-end 0)
|
|
|
636 prefix (buffer-substring begin end))
|
|
|
637 (gnus-set-text-properties 0 (length prefix) nil prefix)
|
|
|
638 (setq entry (assoc prefix alist))
|
|
108
|
639 (if entry
|
|
0
|
640 (setcdr entry (cons line (cdr entry)))
|
|
98
|
641 (push (list prefix line) alist))
|
|
0
|
642 (goto-char begin))
|
|
|
643 (goto-char start)
|
|
|
644 (setq line (1+ line)))
|
|
|
645 ;; We got all the potential prefixes. Now create
|
|
|
646 ;; `gnus-cite-prefix-alist' containing the oldest prefix for each
|
|
|
647 ;; line that appears at least gnus-cite-minimum-match-count
|
|
98
|
648 ;; times. First sort them by length. Longer is older.
|
|
0
|
649 (setq alist (sort alist (lambda (a b)
|
|
|
650 (> (length (car a)) (length (car b))))))
|
|
|
651 (while alist
|
|
|
652 (setq entry (car alist)
|
|
|
653 prefix (car entry)
|
|
|
654 numbers (cdr entry)
|
|
|
655 alist (cdr alist))
|
|
|
656 (cond ((null numbers)
|
|
|
657 ;; No lines with this prefix that wasn't also part of
|
|
|
658 ;; a longer prefix.
|
|
|
659 )
|
|
|
660 ((< (length numbers) gnus-cite-minimum-match-count)
|
|
|
661 ;; Too few lines with this prefix. We keep it a bit
|
|
|
662 ;; longer in case it is an exact match for an attribution
|
|
|
663 ;; line, but we don't remove the line from other
|
|
108
|
664 ;; prefixes.
|
|
98
|
665 (push entry gnus-cite-prefix-alist))
|
|
0
|
666 (t
|
|
98
|
667 (push entry
|
|
|
668 gnus-cite-prefix-alist)
|
|
0
|
669 ;; Remove articles from other prefixes.
|
|
|
670 (let ((loop alist)
|
|
|
671 current)
|
|
|
672 (while loop
|
|
|
673 (setq current (car loop)
|
|
|
674 loop (cdr loop))
|
|
108
|
675 (setcdr current
|
|
98
|
676 (gnus-set-difference (cdr current) numbers)))))))))
|
|
|
677
|
|
|
678 (defun gnus-cite-parse-attributions ()
|
|
|
679 (let (al-alist)
|
|
|
680 ;; Parse attributions
|
|
|
681 (while (re-search-forward gnus-cite-attribution-suffix (point-max) t)
|
|
|
682 (let* ((start (match-beginning 0))
|
|
|
683 (end (match-end 0))
|
|
|
684 (wrote (count-lines (point-min) end))
|
|
|
685 (prefix (gnus-cite-find-prefix wrote))
|
|
|
686 ;; Check previous line for an attribution leader.
|
|
|
687 (tag (progn
|
|
|
688 (beginning-of-line 1)
|
|
|
689 (when (looking-at gnus-supercite-secondary-regexp)
|
|
|
690 (buffer-substring (match-beginning 1)
|
|
|
691 (match-end 1)))))
|
|
|
692 (in (progn
|
|
|
693 (goto-char start)
|
|
|
694 (and (re-search-backward gnus-cite-attribution-prefix
|
|
|
695 (save-excursion
|
|
|
696 (beginning-of-line 0)
|
|
|
697 (point))
|
|
|
698 t)
|
|
|
699 (not (re-search-forward gnus-cite-attribution-suffix
|
|
|
700 start t))
|
|
|
701 (count-lines (point-min) (1+ (point)))))))
|
|
|
702 (when (eq wrote in)
|
|
|
703 (setq in nil))
|
|
|
704 (goto-char end)
|
|
|
705 ;; don't add duplicates
|
|
|
706 (let ((al (buffer-substring (save-excursion (beginning-of-line 0)
|
|
|
707 (1+ (point)))
|
|
|
708 end)))
|
|
|
709 (if (not (assoc al al-alist))
|
|
|
710 (progn
|
|
108
|
711 (push (list wrote in prefix tag)
|
|
98
|
712 gnus-cite-loose-attribution-alist)
|
|
|
713 (push (cons al t) al-alist))))))))
|
|
|
714
|
|
|
715 (defun gnus-cite-connect-attributions ()
|
|
|
716 ;; Connect attributions to citations
|
|
|
717
|
|
0
|
718 ;; No citations have been connected to attribution lines yet.
|
|
|
719 (setq gnus-cite-loose-prefix-alist (append gnus-cite-prefix-alist nil))
|
|
|
720
|
|
|
721 ;; Parse current buffer searching for attribution lines.
|
|
|
722 ;; Find exact supercite citations.
|
|
|
723 (gnus-cite-match-attributions 'small nil
|
|
|
724 (lambda (prefix tag)
|
|
98
|
725 (when tag
|
|
108
|
726 (concat "\\`"
|
|
|
727 (regexp-quote prefix) "[ \t]*"
|
|
98
|
728 (regexp-quote tag) ">"))))
|
|
0
|
729 ;; Find loose supercite citations after attributions.
|
|
|
730 (gnus-cite-match-attributions 'small t
|
|
|
731 (lambda (prefix tag)
|
|
98
|
732 (when tag
|
|
|
733 (concat "\\<"
|
|
|
734 (regexp-quote tag)
|
|
|
735 "\\>"))))
|
|
0
|
736 ;; Find loose supercite citations anywhere.
|
|
|
737 (gnus-cite-match-attributions 'small nil
|
|
|
738 (lambda (prefix tag)
|
|
98
|
739 (when tag
|
|
|
740 (concat "\\<"
|
|
|
741 (regexp-quote tag)
|
|
|
742 "\\>"))))
|
|
0
|
743 ;; Find nested citations after attributions.
|
|
|
744 (gnus-cite-match-attributions 'small-if-unique t
|
|
|
745 (lambda (prefix tag)
|
|
|
746 (concat "\\`" (regexp-quote prefix) ".+")))
|
|
|
747 ;; Find nested citations anywhere.
|
|
|
748 (gnus-cite-match-attributions 'small nil
|
|
|
749 (lambda (prefix tag)
|
|
|
750 (concat "\\`" (regexp-quote prefix) ".+")))
|
|
|
751 ;; Remove loose prefixes with too few lines.
|
|
|
752 (let ((alist gnus-cite-loose-prefix-alist)
|
|
|
753 entry)
|
|
|
754 (while alist
|
|
|
755 (setq entry (car alist)
|
|
|
756 alist (cdr alist))
|
|
98
|
757 (when (< (length (cdr entry)) gnus-cite-minimum-match-count)
|
|
|
758 (setq gnus-cite-prefix-alist
|
|
|
759 (delq entry gnus-cite-prefix-alist)
|
|
|
760 gnus-cite-loose-prefix-alist
|
|
|
761 (delq entry gnus-cite-loose-prefix-alist)))))
|
|
0
|
762 ;; Find flat attributions.
|
|
|
763 (gnus-cite-match-attributions 'first t nil)
|
|
|
764 ;; Find any attributions (are we getting desperate yet?).
|
|
|
765 (gnus-cite-match-attributions 'first nil nil))
|
|
|
766
|
|
|
767 (defun gnus-cite-match-attributions (sort after fun)
|
|
|
768 ;; Match all loose attributions and citations (SORT AFTER FUN) .
|
|
|
769 ;;
|
|
|
770 ;; If SORT is `small', the citation with the shortest prefix will be
|
|
|
771 ;; used, if it is `first' the first prefix will be used, if it is
|
|
|
772 ;; `small-if-unique' the shortest prefix will be used if the
|
|
|
773 ;; attribution line does not share its own prefix with other
|
|
|
774 ;; loose attribution lines, otherwise the first prefix will be used.
|
|
|
775 ;;
|
|
|
776 ;; If AFTER is non-nil, only citations after the attribution line
|
|
|
777 ;; will be considered.
|
|
|
778 ;;
|
|
|
779 ;; If FUN is non-nil, it will be called with the arguments (WROTE
|
|
|
780 ;; PREFIX TAG) and expected to return a regular expression. Only
|
|
|
781 ;; citations whose prefix matches the regular expression will be
|
|
108
|
782 ;; considered.
|
|
|
783 ;;
|
|
0
|
784 ;; WROTE is the attribution line number.
|
|
|
785 ;; PREFIX is the attribution line prefix.
|
|
|
786 ;; TAG is the Supercite tag on the attribution line.
|
|
|
787 (let ((atts gnus-cite-loose-attribution-alist)
|
|
|
788 (case-fold-search t)
|
|
|
789 att wrote in prefix tag regexp limit smallest best size)
|
|
|
790 (while atts
|
|
|
791 (setq att (car atts)
|
|
|
792 atts (cdr atts)
|
|
|
793 wrote (nth 0 att)
|
|
|
794 in (nth 1 att)
|
|
|
795 prefix (nth 2 att)
|
|
|
796 tag (nth 3 att)
|
|
|
797 regexp (if fun (funcall fun prefix tag) "")
|
|
|
798 size (cond ((eq sort 'small) t)
|
|
|
799 ((eq sort 'first) nil)
|
|
|
800 (t (< (length (gnus-cite-find-loose prefix)) 2)))
|
|
|
801 limit (if after wrote -1)
|
|
108
|
802 smallest 1000000
|
|
0
|
803 best nil)
|
|
|
804 (let ((cites gnus-cite-loose-prefix-alist)
|
|
|
805 cite candidate numbers first compare)
|
|
|
806 (while cites
|
|
|
807 (setq cite (car cites)
|
|
|
808 cites (cdr cites)
|
|
|
809 candidate (car cite)
|
|
|
810 numbers (cdr cite)
|
|
|
811 first (apply 'min numbers)
|
|
|
812 compare (if size (length candidate) first))
|
|
|
813 (and (> first limit)
|
|
|
814 regexp
|
|
|
815 (string-match regexp candidate)
|
|
|
816 (< compare smallest)
|
|
|
817 (setq best cite
|
|
|
818 smallest compare))))
|
|
|
819 (if (null best)
|
|
|
820 ()
|
|
|
821 (setq gnus-cite-loose-attribution-alist
|
|
|
822 (delq att gnus-cite-loose-attribution-alist))
|
|
98
|
823 (push (cons wrote (car best)) gnus-cite-attribution-alist)
|
|
|
824 (when in
|
|
|
825 (push (cons in (car best)) gnus-cite-attribution-alist))
|
|
|
826 (when (memq best gnus-cite-loose-prefix-alist)
|
|
|
827 (let ((loop gnus-cite-prefix-alist)
|
|
|
828 (numbers (cdr best))
|
|
|
829 current)
|
|
|
830 (setq gnus-cite-loose-prefix-alist
|
|
|
831 (delq best gnus-cite-loose-prefix-alist))
|
|
|
832 (while loop
|
|
|
833 (setq current (car loop)
|
|
|
834 loop (cdr loop))
|
|
|
835 (if (eq current best)
|
|
|
836 ()
|
|
|
837 (setcdr current (gnus-set-difference (cdr current) numbers))
|
|
|
838 (when (null (cdr current))
|
|
|
839 (setq gnus-cite-loose-prefix-alist
|
|
|
840 (delq current gnus-cite-loose-prefix-alist)
|
|
|
841 atts (delq current atts)))))))))))
|
|
0
|
842
|
|
|
843 (defun gnus-cite-find-loose (prefix)
|
|
|
844 ;; Return a list of loose attribution lines prefixed by PREFIX.
|
|
|
845 (let* ((atts gnus-cite-loose-attribution-alist)
|
|
|
846 att line lines)
|
|
|
847 (while atts
|
|
|
848 (setq att (car atts)
|
|
|
849 line (car att)
|
|
|
850 atts (cdr atts))
|
|
98
|
851 (when (string-equal (gnus-cite-find-prefix line) prefix)
|
|
|
852 (push line lines)))
|
|
0
|
853 lines))
|
|
|
854
|
|
|
855 (defun gnus-cite-add-face (number prefix face)
|
|
|
856 ;; At line NUMBER, ignore PREFIX and add FACE to the rest of the line.
|
|
|
857 (when face
|
|
|
858 (let ((inhibit-point-motion-hooks t)
|
|
|
859 from to)
|
|
|
860 (goto-line number)
|
|
98
|
861 (unless (eobp);; Sometimes things become confused.
|
|
0
|
862 (forward-char (length prefix))
|
|
|
863 (skip-chars-forward " \t")
|
|
|
864 (setq from (point))
|
|
|
865 (end-of-line 1)
|
|
|
866 (skip-chars-backward " \t")
|
|
|
867 (setq to (point))
|
|
|
868 (when (< from to)
|
|
|
869 (gnus-overlay-put (gnus-make-overlay from to) 'face face))))))
|
|
|
870
|
|
|
871 (defun gnus-cite-toggle (prefix)
|
|
|
872 (save-excursion
|
|
|
873 (set-buffer gnus-article-buffer)
|
|
|
874 (let ((buffer-read-only nil)
|
|
|
875 (numbers (cdr (assoc prefix gnus-cite-prefix-alist)))
|
|
|
876 (inhibit-point-motion-hooks t)
|
|
|
877 number)
|
|
|
878 (while numbers
|
|
|
879 (setq number (car numbers)
|
|
|
880 numbers (cdr numbers))
|
|
|
881 (goto-line number)
|
|
|
882 (cond ((get-text-property (point) 'invisible)
|
|
|
883 (remove-text-properties (point) (progn (forward-line 1) (point))
|
|
|
884 gnus-hidden-properties))
|
|
|
885 ((assq number gnus-cite-attribution-alist))
|
|
|
886 (t
|
|
108
|
887 (gnus-add-text-properties
|
|
0
|
888 (point) (progn (forward-line 1) (point))
|
|
98
|
889 (nconc (list 'article-type 'cite)
|
|
|
890 gnus-hidden-properties))))))))
|
|
0
|
891
|
|
|
892 (defun gnus-cite-find-prefix (line)
|
|
|
893 ;; Return citation prefix for LINE.
|
|
|
894 (let ((alist gnus-cite-prefix-alist)
|
|
|
895 (prefix "")
|
|
|
896 entry)
|
|
|
897 (while alist
|
|
|
898 (setq entry (car alist)
|
|
|
899 alist (cdr alist))
|
|
98
|
900 (when (memq line (cdr entry))
|
|
|
901 (setq prefix (car entry))))
|
|
0
|
902 prefix))
|
|
|
903
|
|
2
|
904 (gnus-add-shutdown 'gnus-cache-close 'gnus)
|
|
|
905
|
|
|
906 (defun gnus-cache-close ()
|
|
|
907 (setq gnus-cite-prefix-alist nil))
|
|
|
908
|
|
0
|
909 (gnus-ems-redefine)
|
|
|
910
|
|
|
911 (provide 'gnus-cite)
|
|
|
912
|
|
|
913 ;;; gnus-cite.el ends here
|
