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1 ;;; rmailkwd.el --- part of the "RMAIL" mail reader for Emacs.
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2
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3 ;; Copyright (C) 1985, 1988 Free Software Foundation, Inc.
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4
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5 ;; Maintainer: FSF
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6 ;; Keywords: mail
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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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0
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24
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25 ;;; Code:
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26
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27 ;; Global to all RMAIL buffers. It exists primarily for the sake of
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28 ;; completion. It is better to use strings with the label functions
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29 ;; and let them worry about making the label.
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30
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31 (defvar rmail-label-obarray (make-vector 47 0))
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32
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33 ;; Named list of symbols representing valid message attributes in RMAIL.
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34
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35 (defconst rmail-attributes
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36 (cons 'rmail-keywords
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37 (mapcar '(lambda (s) (intern s rmail-label-obarray))
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38 '("deleted" "answered" "filed" "forwarded" "unseen" "edited"))))
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39
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40 (defconst rmail-deleted-label (intern "deleted" rmail-label-obarray))
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41
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42 ;; Named list of symbols representing valid message keywords in RMAIL.
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43
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44 (defvar rmail-keywords nil)
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45
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46 (defun rmail-add-label (string)
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47 "Add LABEL to labels associated with current RMAIL message.
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48 Completion is performed over known labels when reading."
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49 (interactive (list (rmail-read-label "Add label")))
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50 (rmail-set-label string t))
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51
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52 (defun rmail-kill-label (string)
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53 "Remove LABEL from labels associated with current RMAIL message.
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54 Completion is performed over known labels when reading."
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55 (interactive (list (rmail-read-label "Remove label")))
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56 (rmail-set-label string nil))
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57
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58 (defun rmail-read-label (prompt)
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59 (if (not rmail-keywords) (rmail-parse-file-keywords))
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60 (let ((result
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61 (completing-read (concat prompt
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62 (if rmail-last-label
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63 (concat " (default "
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64 (symbol-name rmail-last-label)
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65 "): ")
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66 ": "))
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67 rmail-label-obarray
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68 nil
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69 nil)))
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70 (if (string= result "")
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71 rmail-last-label
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72 (setq rmail-last-label (rmail-make-label result t)))))
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73
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74 (defun rmail-set-label (l state &optional n)
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75 (rmail-maybe-set-message-counters)
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76 (if (not n) (setq n rmail-current-message))
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77 (aset rmail-summary-vector (1- n) nil)
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78 (let* ((attribute (rmail-attribute-p l))
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79 (keyword (and (not attribute)
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80 (or (rmail-keyword-p l)
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81 (rmail-install-keyword l))))
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82 (label (or attribute keyword)))
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83 (if label
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84 (let ((omax (- (buffer-size) (point-max)))
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85 (omin (- (buffer-size) (point-min)))
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86 (buffer-read-only nil)
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87 (case-fold-search t))
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88 (unwind-protect
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89 (save-excursion
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90 (widen)
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91 (goto-char (rmail-msgbeg n))
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92 (forward-line 1)
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93 (if (not (looking-at "[01],"))
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94 nil
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95 (let ((start (1+ (point)))
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96 (bound))
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97 (narrow-to-region (point) (progn (end-of-line) (point)))
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98 (setq bound (point-max))
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99 (search-backward ",," nil t)
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100 (if attribute
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101 (setq bound (1+ (point)))
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102 (setq start (1+ (point))))
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103 (goto-char start)
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104 ; (while (re-search-forward "[ \t]*,[ \t]*" nil t)
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105 ; (replace-match ","))
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106 ; (goto-char start)
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107 (if (re-search-forward
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108 (concat ", " (rmail-quote-label-name label) ",")
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109 bound
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110 'move)
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111 (if (not state) (replace-match ","))
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112 (if state (insert " " (symbol-name label) ",")))
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113 (if (eq label rmail-deleted-label)
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114 (rmail-set-message-deleted-p n state)))))
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115 (narrow-to-region (- (buffer-size) omin) (- (buffer-size) omax))
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116 (if (= n rmail-current-message) (rmail-display-labels)))))))
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117
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118 ;; Commented functions aren't used by RMAIL but might be nice for user
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119 ;; packages that do stuff with RMAIL. Note that rmail-message-labels-p
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120 ;; is in rmail.el now.
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121
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122 ;(defun rmail-message-attribute-p (attribute &optional n)
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123 ; "Returns t if ATTRIBUTE on NTH or current message."
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124 ; (rmail-message-labels-p (rmail-make-label attribute t) n))
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125
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126 ;(defun rmail-message-keyword-p (keyword &optional n)
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127 ; "Returns t if KEYWORD on NTH or current message."
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128 ; (rmail-message-labels-p (rmail-make-label keyword t) n t))
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129
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130 ;(defun rmail-message-label-p (label &optional n)
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131 ; "Returns symbol if LABEL (attribute or keyword) on NTH or current message."
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132 ; (rmail-message-labels-p (rmail-make-label label t) n 'all))
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133
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134 ;; Not used by RMAIL but might be nice for user package.
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135
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136 ;(defun rmail-parse-message-labels (&optional n)
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137 ; "Returns labels associated with NTH or current RMAIL message.
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138 ;Results is a list of two lists. The first is the message attributes
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139 ;and the second is the message keywords. Labels are represented as symbols."
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140 ; (let ((omin (- (buffer-size) (point-min)))
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141 ; (omax (- (buffer-size) (point-max)))
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142 ; (result))
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143 ; (unwind-protect
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144 ; (save-excursion
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145 ; (let ((beg (rmail-msgbeg (or n rmail-current-message))))
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146 ; (widen)
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147 ; (goto-char beg)
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148 ; (forward-line 1)
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149 ; (if (looking-at "[01],")
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150 ; (save-restriction
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151 ; (narrow-to-region (point) (save-excursion (end-of-line) (point)))
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152 ; (rmail-nuke-whitespace)
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153 ; (goto-char (1+ (point-min)))
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154 ; (list (mail-parse-comma-list) (mail-parse-comma-list))))))
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155 ; (narrow-to-region (- (buffer-size) omin)
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156 ; (- (buffer-size) omax))
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157 ; nil)))
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158
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159 (defun rmail-attribute-p (s)
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160 (let ((symbol (rmail-make-label s)))
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161 (if (memq symbol (cdr rmail-attributes)) symbol)))
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162
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163 (defun rmail-keyword-p (s)
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164 (let ((symbol (rmail-make-label s)))
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165 (if (memq symbol (cdr (rmail-keywords))) symbol)))
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166
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167 (defun rmail-make-label (s &optional forcep)
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168 (cond ((symbolp s) s)
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169 (forcep (intern (downcase s) rmail-label-obarray))
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170 (t (intern-soft (downcase s) rmail-label-obarray))))
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171
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172 (defun rmail-force-make-label (s)
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173 (intern (downcase s) rmail-label-obarray))
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174
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175 (defun rmail-quote-label-name (label)
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176 (regexp-quote (symbol-name (rmail-make-label label t))))
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177
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178 ;; Motion on messages with keywords.
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179
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180 (defun rmail-previous-labeled-message (n labels)
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181 "Show previous message with one of the labels LABELS.
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182 LABELS should be a comma-separated list of label names.
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183 If LABELS is empty, the last set of labels specified is used.
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184 With prefix argument N moves backward N messages with these labels."
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185 (interactive "p\nsMove to previous msg with labels: ")
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186 (rmail-next-labeled-message (- n) labels))
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187
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188 (defun rmail-next-labeled-message (n labels)
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189 "Show next message with one of the labels LABELS.
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190 LABELS should be a comma-separated list of label names.
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191 If LABELS is empty, the last set of labels specified is used.
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192 With prefix argument N moves forward N messages with these labels."
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193 (interactive "p\nsMove to next msg with labels: ")
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194 (if (string= labels "")
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195 (setq labels rmail-last-multi-labels))
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196 (or labels
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197 (error "No labels to find have been specified previously"))
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198 (setq rmail-last-multi-labels labels)
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199 (rmail-maybe-set-message-counters)
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200 (let ((lastwin rmail-current-message)
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201 (current rmail-current-message)
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202 (regexp (concat ", ?\\("
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203 (mail-comma-list-regexp labels)
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204 "\\),")))
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205 (save-restriction
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206 (widen)
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207 (while (and (> n 0) (< current rmail-total-messages))
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208 (setq current (1+ current))
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209 (if (rmail-message-labels-p current regexp)
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210 (setq lastwin current n (1- n))))
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211 (while (and (< n 0) (> current 1))
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212 (setq current (1- current))
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213 (if (rmail-message-labels-p current regexp)
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214 (setq lastwin current n (1+ n)))))
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215 (rmail-show-message lastwin)
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216 (if (< n 0)
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217 (message "No previous message with labels %s" labels))
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218 (if (> n 0)
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219 (message "No following message with labels %s" labels))))
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220
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221 ;;; Manipulate the file's Labels option.
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222
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223 ;; Return a list of symbols for all
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224 ;; the keywords (labels) recorded in this file's Labels option.
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225 (defun rmail-keywords ()
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226 (or rmail-keywords (rmail-parse-file-keywords)))
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227
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228 ;; Set rmail-keywords to a list of symbols for all
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229 ;; the keywords (labels) recorded in this file's Labels option.
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230 (defun rmail-parse-file-keywords ()
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231 (save-restriction
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232 (save-excursion
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233 (widen)
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234 (goto-char 1)
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235 (setq rmail-keywords
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236 (if (search-forward "\nLabels:" (rmail-msgbeg 1) t)
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237 (progn
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238 (narrow-to-region (point) (progn (end-of-line) (point)))
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239 (goto-char (point-min))
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240 (cons 'rmail-keywords
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241 (mapcar 'rmail-force-make-label
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242 (mail-parse-comma-list)))))))))
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243
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244 ;; Add WORD to the list in the file's Labels option.
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245 ;; Any keyword used for the first time needs this done.
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246 (defun rmail-install-keyword (word)
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247 (let ((keyword (rmail-make-label word t))
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248 (keywords (rmail-keywords)))
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249 (if (not (or (rmail-attribute-p keyword)
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250 (rmail-keyword-p keyword)))
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251 (let ((omin (- (buffer-size) (point-min)))
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252 (omax (- (buffer-size) (point-max))))
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253 (unwind-protect
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254 (save-excursion
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255 (widen)
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256 (goto-char 1)
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257 (let ((case-fold-search t)
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258 (buffer-read-only nil))
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259 (or (search-forward "\nLabels:" nil t)
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260 (progn
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261 (end-of-line)
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262 (insert "\nLabels:")))
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263 (delete-region (point) (progn (end-of-line) (point)))
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264 (setcdr keywords (cons keyword (cdr keywords)))
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265 (while (setq keywords (cdr keywords))
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266 (insert (symbol-name (car keywords)) ","))
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267 (delete-char -1)))
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268 (narrow-to-region (- (buffer-size) omin)
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269 (- (buffer-size) omax)))))
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270 keyword))
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271
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272 ;;; rmailkwd.el ends here
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