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1 ;;; Miscellaneous functions for VM
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2 ;;; Copyright (C) 1989, 1990, 1991, 1993, 1994 Kyle E. Jones
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3 ;;;
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4 ;;; This program is free software; you can redistribute it and/or modify
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5 ;;; it under the terms of the GNU General Public License as published by
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6 ;;; the Free Software Foundation; either version 1, or (at your option)
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7 ;;; any later version.
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8 ;;;
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9 ;;; This program is distributed in the hope that it will be useful,
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10 ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 ;;; GNU General Public License for more details.
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13 ;;;
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14 ;;; You should have received a copy of the GNU General Public License
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15 ;;; along with this program; if not, write to the Free Software
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16 ;;; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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17
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18 (provide 'vm-misc)
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19
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20 (defun vm-delete-non-matching-strings (regexp list &optional destructively)
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21 "Delete strings matching REGEXP from LIST.
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22 Optional third arg non-nil means to destructively alter LIST, instead of
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23 working on a copy.
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24
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25 The new version of the list, minus the deleted strings, is returned."
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26 (or destructively (setq list (copy-sequence list)))
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27 (let ((curr list) (prev nil))
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28 (while curr
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29 (if (string-match regexp (car curr))
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30 (setq prev curr
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31 curr (cdr curr))
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32 (if (null prev)
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33 (setq list (cdr list)
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34 curr list)
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35 (setcdr prev (cdr curr))
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36 (setq curr (cdr curr)))))
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37 list ))
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38
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39 (defun vm-parse (string regexp &optional matchn)
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40 (or matchn (setq matchn 1))
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41 (let (list)
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42 (store-match-data nil)
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43 (while (string-match regexp string (match-end 0))
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44 (setq list (cons (substring string (match-beginning matchn)
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45 (match-end matchn)) list)))
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46 (nreverse list)))
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47
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48 (defun vm-parse-addresses (string)
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49 (if (null string)
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50 ()
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51 (let (work-buffer)
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52 (save-excursion
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53 (unwind-protect
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54 (let (list start s char)
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55 (setq work-buffer (generate-new-buffer "*vm-work*"))
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56 (set-buffer work-buffer)
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57 (insert string)
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58 (goto-char (point-min))
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59 (skip-chars-forward "\t\f\n\r ")
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60 (setq start (point))
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61 (while (not (eobp))
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62 (skip-chars-forward "^\"\\,(")
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63 (setq char (following-char))
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64 (cond ((= char ?\\)
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65 (forward-char 1)
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66 (if (not (eobp))
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67 (forward-char 1)))
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68 ((= char ?,)
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69 (setq s (buffer-substring start (point)))
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70 (if (or (null (string-match "^[\t\f\n\r ]+$" s))
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71 (not (string= s "")))
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72 (setq list (cons s list)))
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73 (forward-char 1)
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74 (skip-chars-forward "\t\f\n\r ")
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75 (setq start (point)))
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76 ((= char ?\")
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77 (forward-char 1)
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78 (re-search-forward "[^\\]\"" nil 0))
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79 ((= char ?\()
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80 (let ((parens 1))
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81 (forward-char 1)
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82 (while (and (not (eobp)) (not (zerop parens)))
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83 (re-search-forward "[^\\][()]" nil 0)
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84 (cond ((eobp))
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85 ((= (preceding-char) ?\()
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86 (setq parens (1+ parens)))
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87 ((= (preceding-char) ?\))
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88 (setq parens (1- parens)))))))))
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89 (setq s (buffer-substring start (point)))
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90 (if (and (null (string-match "^[\t\f\n\r ]+$" s))
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91 (not (string= s "")))
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92 (setq list (cons s list)))
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93 (nreverse list)) ; jwz: fixed order
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94 (and work-buffer (kill-buffer work-buffer)))))))
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95
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96 (defun vm-write-string (where string)
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97 (if (bufferp where)
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98 (vm-save-buffer-excursion
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99 (set-buffer where)
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100 (goto-char (point-max))
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101 (insert string))
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102 (let ((temp-buffer nil))
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103 (unwind-protect
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104 (save-excursion
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105 (setq temp-buffer (generate-new-buffer "*vm-work*"))
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106 (set-buffer temp-buffer)
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107 (insert string)
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108 (write-region (point-min) (point-max) where t 'quiet))
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109 (and temp-buffer (kill-buffer temp-buffer))))))
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110
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111 (defmacro vm-marker (pos &optional buffer)
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112 (list 'set-marker '(make-marker) pos buffer))
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113
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114 (defmacro vm-increment (variable)
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115 (list 'setq variable (list '1+ variable)))
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116
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117 (defmacro vm-decrement (variable)
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118 (list 'setq variable (list '1- variable)))
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119
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120 (defmacro vm-select-folder-buffer ()
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121 '(and vm-mail-buffer
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122 (or (buffer-name vm-mail-buffer)
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123 (error "Folder buffer has been killed."))
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124 (set-buffer vm-mail-buffer)))
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125
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126 (defun vm-check-for-killed-summary ()
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127 (and (bufferp vm-summary-buffer) (null (buffer-name vm-summary-buffer))
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128 (let ((mp vm-message-list))
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129 (setq vm-summary-buffer nil)
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130 (while mp
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131 (vm-set-su-start-of (car mp) nil)
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132 (vm-set-su-end-of (car mp) nil)
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133 (setq mp (cdr mp))))))
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134
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135 (defun vm-check-for-killed-folder ()
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136 (and (bufferp vm-mail-buffer) (null (buffer-name vm-mail-buffer))
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137 (setq vm-mail-buffer nil)))
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138
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139 (defmacro vm-error-if-folder-read-only ()
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140 '(while vm-folder-read-only
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141 (signal 'folder-read-only (list (current-buffer)))))
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142
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143 ;; XEmacs change
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144 (define-error 'folder-read-only "Folder is read-only")
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145
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146 (defmacro vm-error-if-virtual-folder ()
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147 '(and (eq major-mode 'vm-virtual-mode)
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148 (error "%s cannot be applied to virtual folders." this-command)))
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149
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150 (defmacro vm-build-threads-if-unbuilt ()
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151 '(if (null vm-thread-obarray)
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152 (vm-build-threads nil)))
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153
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154 (defun vm-abs (n) (if (< n 0) (- n) n))
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155
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156 ;; save-restriction flubs restoring the clipping region if you
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157 ;; (widen) and modify text outside the old region.
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158 ;; This should do it right.
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159 (defmacro vm-save-restriction (&rest forms)
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160 (let ((vm-sr-clip (make-symbol "vm-sr-clip"))
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161 (vm-sr-min (make-symbol "vm-sr-min"))
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162 (vm-sr-max (make-symbol "vm-sr-max")))
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163 (list 'let (list (list vm-sr-clip '(> (buffer-size)
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164 (- (point-max) (point-min))))
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165 ;; this shouldn't be necessary but the
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166 ;; byte-compiler turns these into interned symbols
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167 ;; which utterly defeats the purpose of the
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168 ;; make-symbol calls above. Soooo, until the compiler
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169 ;; is fixed, these must be made into (let ...)
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170 ;; temporaries so that nested calls to this macros
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171 ;; won't misbehave.
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172 vm-sr-min vm-sr-max)
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173 (list 'and vm-sr-clip
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174 (list 'setq vm-sr-min '(set-marker (make-marker) (point-min)))
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175 (list 'setq vm-sr-max '(set-marker (make-marker) (point-max))))
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176 (list 'unwind-protect (cons 'progn forms)
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177 '(widen)
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178 (list 'and vm-sr-clip
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179 (list 'progn
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180 (list 'narrow-to-region vm-sr-min vm-sr-max)
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181 (list 'set-marker vm-sr-min nil)
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182 (list 'set-marker vm-sr-max nil)))))))
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183
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184 (defmacro vm-save-buffer-excursion (&rest forms)
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185 (list 'let '((vm-sbe-buffer (current-buffer)))
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186 (list 'unwind-protect
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187 (cons 'progn forms)
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188 '(and (not (eq vm-sbe-buffer (current-buffer)))
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189 (buffer-name vm-sbe-buffer)
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190 (set-buffer vm-sbe-buffer)))))
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191
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192 (defun vm-last (list) (while (cdr-safe list) (setq list (cdr list))) list)
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193
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194 (defun vm-vector-to-list (vector)
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195 (let ((i (1- (length vector)))
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196 list)
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197 (while (>= i 0)
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198 (setq list (cons (aref vector i) list))
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199 (vm-decrement i))
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200 list ))
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201
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202 (defun vm-extend-vector (vector length &optional fill)
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203 (let ((vlength (length vector)))
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204 (if (< vlength length)
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205 (apply 'vector (nconc (vm-vector-to-list vector)
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206 (make-list (- length vlength) fill)))
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207 vector )))
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208
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209 (defun vm-obarray-to-string-list (obarray)
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210 (let ((list nil))
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211 (mapatoms (function (lambda (s) (setq list (cons (symbol-name s) list))))
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212 obarray)
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213 list ))
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214
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215 (defun vm-mapcar (function &rest lists)
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216 (let (arglist result)
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217 (while (car lists)
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218 (setq arglist (mapcar 'car lists))
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219 (setq result (cons (apply function arglist) result))
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220 (setq lists (mapcar 'cdr lists)))
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221 (nreverse result)))
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222
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223 (defun vm-mapc (function &rest lists)
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224 (let (arglist)
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225 (while (car lists)
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226 (setq arglist (mapcar 'car lists))
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227 (apply function arglist)
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228 (setq lists (mapcar 'cdr lists)))))
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229
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230 (defun vm-delete (predicate list &optional reverse)
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231 (let ((p list) (reverse (if reverse 'not 'identity)) prev)
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232 (while p
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233 (if (funcall reverse (funcall predicate (car p)))
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234 (if (null prev)
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235 (setq list (cdr list) p list)
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236 (setcdr prev (cdr p))
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237 (setq p (cdr p)))
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238 (setq prev p p (cdr p))))
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239 list ))
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240
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241 (defun vm-delete-duplicates (list &optional all hack-addresses)
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242 "Delete duplicate equivalent strings from the list.
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243 If ALL is t, then if there is more than one occurrence of a string in the list,
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244 then all occurrences of it are removed instead of just the subsequent ones.
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245 If HACK-ADDRESSES is t, then the strings are considered to be mail addresses,
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246 and only the address part is compared (so that \"Name <foo>\" and \"foo\"
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247 would be considered to be equivalent.)"
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248 (let ((hashtable vm-delete-duplicates-obarray)
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249 (new-list nil)
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250 sym-string sym)
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251 (fillarray hashtable 0)
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252 (while list
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253 (setq sym-string
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254 (if hack-addresses
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255 (nth 1 (funcall vm-chop-full-name-function (car list)))
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256 (car list))
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257 sym (intern sym-string hashtable))
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258 (if (boundp sym)
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259 (and all (setcar (symbol-value sym) nil))
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260 (setq new-list (cons (car list) new-list))
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261 (set sym new-list))
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262 (setq list (cdr list)))
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263 (delq nil (nreverse new-list))))
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264
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265 (defun vm-member-0 (thing list)
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266 (catch 'done
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267 (while list
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268 (and (equal (car list) thing)
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269 (throw 'done list))
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270 (setq list (cdr list)))
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271 nil ))
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272
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273 (fset 'vm-member (symbol-function (if (fboundp 'member) 'member 'vm-member-0)))
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274
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275 (defun vm-delqual (ob list)
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276 (let ((prev nil)
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277 (curr list))
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278 (while curr
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279 (if (not (equal ob (car curr)))
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280 (setq prev curr
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281 curr (cdr curr))
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282 (if (null prev)
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283 (setq list (cdr list)
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284 curr list)
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285 (setq curr (cdr curr))
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286 (setcdr prev curr))))
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287 list ))
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288
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289 (defun vm-copy-local-variables (buffer &rest variables)
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290 (let ((values (mapcar 'symbol-value variables)))
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291 (save-excursion
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292 (set-buffer buffer)
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293 (vm-mapc 'set variables values))))
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294
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295 ;; XEmacs change
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296 (define-error 'folder-empty "Folder is empty")
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297 (define-error 'unrecognized-folder-type "Unrecognized folder type")
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298
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299 (defun vm-error-if-folder-empty ()
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300 (while (null vm-message-list)
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301 (if vm-folder-type
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302 (signal 'unrecognized-folder-type nil)
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303 (signal 'folder-empty nil))))
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304
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305 (defun vm-copy (object)
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306 (cond ((consp object)
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307 (let (return-value cons)
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308 (setq return-value (cons (vm-copy (car object)) nil)
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309 cons return-value
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310 object (cdr object))
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311 (while (consp object)
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312 (setcdr cons (cons (vm-copy (car object)) nil))
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313 (setq cons (cdr cons)
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314 object (cdr object)))
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315 (setcdr cons object)
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316 return-value ))
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317 ((vectorp object) (apply 'vector (mapcar 'vm-copy object)))
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318 ((stringp object) (copy-sequence object))
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319 (t object)))
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320
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321 (defun vm-xemacs-p ()
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322 (let ((case-fold-search nil))
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323 (string-match "XEmacs" emacs-version)))
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324
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325 (defun vm-fsfemacs-19-p ()
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326 (and (string-match "^19" emacs-version)
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327 (not (string-match "XEmacs\\|Lucid" emacs-version))))
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328
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329 ;; make-frame might be defined and still not work. This would
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330 ;; be true since the user could be running on a tty and using
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331 ;; XEmacs 19.12, or using FSF Emacs 19.28 (or prior FSF Emacs versions).
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332 ;;
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333 ;; make-frame works on ttys in FSF Emacs 19.29, but other than
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334 ;; looking at the version number I don't know a sane way to
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335 ;; test for it without just running make-frame. I'll just
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336 ;; let it not work for now... someone will complain eventually
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337 ;; and I'll think of something.
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338 (defun vm-multiple-frames-possible-p ()
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339 (or (and (boundp 'window-system) (not (eq window-system nil)))
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340 (and (fboundp 'device-type) (eq (device-type) 'x))))
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341
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342 (defun vm-mouse-support-possible-p ()
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343 (vm-multiple-frames-possible-p))
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344
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345 (defun vm-menu-support-possible-p ()
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346 (or (and (boundp 'window-system) (eq window-system 'x))
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347 (and (fboundp 'device-type) (eq (device-type) 'x))))
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348
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349 (defun vm-toolbar-support-possible-p ()
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350 (and (vm-xemacs-p)
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351 (vm-multiple-frames-possible-p)
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352 (featurep 'toolbar)))
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353
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354 (defun vm-run-message-hook (message &optional hook-variable)
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355 (save-excursion
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356 (set-buffer (vm-buffer-of message))
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357 (vm-save-restriction
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358 (widen)
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359 (save-excursion
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360 (narrow-to-region (vm-headers-of message) (vm-text-end-of message))
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361 (run-hooks hook-variable)))))
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362
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363 (defun vm-error-free-call (function &rest args)
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364 (condition-case nil
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365 (apply function args)
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366 (error nil)))
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367
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368 ;; XEmacs change
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369 (define-error 'beginning-of-folder "Beginning of folder")
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370 (define-error 'end-of-folder "End of folder")
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371
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372 (defun vm-trace (&rest args)
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373 (save-excursion
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374 (set-buffer (get-buffer-create "*vm-trace*"))
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375 (apply 'insert args)))
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376
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377 (defun vm-timezone-make-date-sortable (string)
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378 (or (cdr (assq string vm-sortable-date-alist))
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379 (let ((vect (vm-parse-date string))
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380 (date (vm-parse (current-time-string) " *\\([^ ]+\\)")))
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381 ;; if specified date is incomplete fill in the holes
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382 ;; with useful information, defaulting to the current
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383 ;; date and timezone for everything except hh:mm:ss which
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384 ;; defaults to midnight.
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385 (if (equal (aref vect 1) "")
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386 (aset vect 1 (nth 2 date)))
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387 (if (equal (aref vect 2) "")
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388 (aset vect 2 (nth 1 date)))
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389 (if (equal (aref vect 3) "")
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390 (aset vect 3 (nth 4 date)))
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391 (if (equal (aref vect 4) "")
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392 (aset vect 4 "00:00:00"))
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393 (if (equal (aref vect 5) "")
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394 (aset vect 5 (vm-current-time-zone)))
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395 ;; save this work so we won't have to do it again
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396 (setq vm-sortable-date-alist
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397 (cons (cons string
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398 (timezone-make-date-sortable
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399 (format "%s %s %s %s %s"
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400 (aref vect 1)
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401 (aref vect 2)
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402 (aref vect 3)
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403 (aref vect 4)
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404 (aref vect 5))))
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405 vm-sortable-date-alist))
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406 ;; return result
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407 (cdr (car vm-sortable-date-alist)))))
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408
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409 (defun vm-current-time-zone ()
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410 (or (condition-case nil
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411 (let* ((zone (car (current-time-zone)))
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412 (absmin (/ (vm-abs zone) 60)))
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413 (format "%c%02d%02d" (if (< zone 0) ?- ?+)
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414 (/ absmin 60) (% absmin 60)))
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415 (error nil))
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416 (let ((temp-buffer nil))
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417 (condition-case nil
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418 (unwind-protect
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419 (save-excursion
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420 (setq temp-buffer (generate-new-buffer "*vm-work*"))
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421 (set-buffer temp-buffer)
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422 (call-process "date" nil temp-buffer nil)
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423 (nth 4 (vm-parse (vm-buffer-string-no-properties)
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424 " *\\([^ ]+\\)")))
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425 (and temp-buffer (kill-buffer temp-buffer)))
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426 (error nil)))
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427 ""))
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428
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429 (defun vm-should-generate-summary ()
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430 (cond ((eq vm-startup-with-summary t) t)
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431 ((integerp vm-startup-with-summary)
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432 (let ((n vm-startup-with-summary))
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433 (cond ((< n 0) (null (nth (vm-abs n) vm-message-list)))
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434 (t (nth (1- n) vm-message-list)))))
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435 (vm-startup-with-summary t)
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436 (t nil)))
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437
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438 (defun vm-find-composition-buffer (&optional not-picky)
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439 (let ((b-list (buffer-list)) choice alternate)
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440 (save-excursion
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441 (while b-list
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442 (set-buffer (car b-list))
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443 (if (eq major-mode 'mail-mode)
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444 (if (buffer-modified-p)
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445 (setq choice (current-buffer)
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446 b-list nil)
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447 (and not-picky (null alternate)
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448 (setq alternate (current-buffer)))
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449 (setq b-list (cdr b-list)))
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450 (setq b-list (cdr b-list))))
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451 (or choice alternate))))
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452
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453 (defun vm-get-file-buffer (file)
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454 "Like get-file-buffer, but also checks buffers against FILE's truename"
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455 (or (get-file-buffer file)
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456 (and (fboundp 'file-truename)
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457 (get-file-buffer (file-truename file)))))
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458
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459 (defun vm-set-region-face (start end face)
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460 (cond ((fboundp 'make-overlay)
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461 (let ((o (make-overlay start end)))
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462 (overlay-put o 'face face)))
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463 ((fboundp 'make-extent)
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464 (let ((o (make-extent start end)))
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465 (set-extent-property o 'face face)))))
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466
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467 (defun vm-unsaved-message (&rest args)
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468 (let ((message-log-max nil))
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469 (apply (function message) args)))
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470
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471 (defun vm-default-buffer-substring-no-properties (beg end &optional buffer)
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472 (let ((s (if buffer
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473 (save-excursion
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474 (set-buffer buffer)
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475 (buffer-substring beg end))
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476 (buffer-substring beg end))))
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477 (set-text-properties 0 (length s) nil s)
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478 (copy-sequence s)))
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479
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480 (fset 'vm-buffer-substring-no-properties
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481 (cond ((fboundp 'buffer-substring-no-properties)
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482 (function buffer-substring-no-properties))
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483 ((vm-xemacs-p)
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484 (function buffer-substring))
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485 (t (function vm-default-buffer-substring-no-properties))))
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486
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487 (defun vm-buffer-string-no-properties ()
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488 (vm-buffer-substring-no-properties (point-min) (point-max)))
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