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16
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1 ;;; gnus-util.el --- utility functions for Gnus
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2 ;; Copyright (C) 1996,97 Free Software Foundation, Inc.
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3
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4 ;; Author: Lars Magne Ingebrigtsen <larsi@ifi.uio.no>
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5 ;; Keywords: news
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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 ;; Nothing in this file depends on any other parts of Gnus -- all
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27 ;; functions and macros in this file are utility functions that are
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28 ;; used by Gnus and may be used by any other package without loading
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29 ;; Gnus first.
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30
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31 ;;; Code:
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32
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33 ;(if (fboundp 'point-at-bol)
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34 ; (fset 'gnus-point-at-bol 'point-at-bol)
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35 ; (defsubst gnus-point-at-bol ()
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36 ; "Return point at the beginning of the line."
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37 ; (let ((p (point)))
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38 ; (beginning-of-line)
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39 ; (prog1
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40 ; (point)
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41 ; (goto-char p)))))
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42
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43 ;(if (fboundp 'point-at-eol)
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44 ; (fset 'gnus-point-at-eol 'point-at-eol)
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45 ; (defsubst gnus-point-at-eol ()
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46 ; "Return point at the end of the line."
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47 ; (let ((p (point)))
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48 ; (end-of-line)
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49 ; (prog1
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50 ; (point)
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51 ; (goto-char p)))))
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52
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53 (require 'custom)
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54 (require 'cl)
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55 (require 'nnheader)
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56 (require 'timezone)
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57 (require 'message)
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58
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59 (defun gnus-boundp (variable)
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60 "Return non-nil if VARIABLE is bound and non-nil."
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61 (and (boundp variable)
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62 (symbol-value variable)))
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63
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64 (defmacro gnus-eval-in-buffer-window (buffer &rest forms)
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65 "Pop to BUFFER, evaluate FORMS, and then return to the original window."
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66 (let ((tempvar (make-symbol "GnusStartBufferWindow"))
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67 (w (make-symbol "w"))
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68 (buf (make-symbol "buf")))
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69 `(let* ((,tempvar (selected-window))
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70 (,buf ,buffer)
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71 (,w (get-buffer-window ,buf 'visible)))
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72 (unwind-protect
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73 (progn
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74 (if ,w
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75 (progn
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76 (select-window ,w)
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77 (set-buffer (window-buffer ,w)))
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78 (pop-to-buffer ,buf))
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79 ,@forms)
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80 (select-window ,tempvar)))))
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81
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82 (put 'gnus-eval-in-buffer-window 'lisp-indent-function 1)
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83 (put 'gnus-eval-in-buffer-window 'edebug-form-spec '(form body))
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84
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85 (defmacro gnus-intern-safe (string hashtable)
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86 "Set hash value. Arguments are STRING, VALUE, and HASHTABLE."
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87 `(let ((symbol (intern ,string ,hashtable)))
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88 (or (boundp symbol)
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89 (set symbol nil))
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90 symbol))
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91
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92 ;; modified by MORIOKA Tomohiko <morioka@jaist.ac.jp>
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93 ;; function `substring' might cut on a middle of multi-octet
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94 ;; character.
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95 (defun gnus-truncate-string (str width)
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96 (substring str 0 width))
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97
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98 ;; Added by Geoffrey T. Dairiki <dairiki@u.washington.edu>. A safe way
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99 ;; to limit the length of a string. This function is necessary since
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100 ;; `(substr "abc" 0 30)' pukes with "Args out of range".
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101 (defsubst gnus-limit-string (str width)
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102 (if (> (length str) width)
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103 (substring str 0 width)
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104 str))
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105
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106 (defsubst gnus-functionp (form)
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107 "Return non-nil if FORM is funcallable."
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108 (or (and (symbolp form) (fboundp form))
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109 (and (listp form) (eq (car form) 'lambda))))
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110
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111 (defsubst gnus-goto-char (point)
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112 (and point (goto-char point)))
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113
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114 (defmacro gnus-buffer-exists-p (buffer)
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115 `(let ((buffer ,buffer))
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116 (when buffer
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117 (funcall (if (stringp buffer) 'get-buffer 'buffer-name)
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118 buffer))))
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119
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120 (defmacro gnus-kill-buffer (buffer)
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121 `(let ((buf ,buffer))
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122 (when (gnus-buffer-exists-p buf)
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123 (kill-buffer buf))))
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124
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125 (defun gnus-delete-first (elt list)
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126 "Delete by side effect the first occurrence of ELT as a member of LIST."
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127 (if (equal (car list) elt)
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128 (cdr list)
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129 (let ((total list))
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130 (while (and (cdr list)
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131 (not (equal (cadr list) elt)))
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132 (setq list (cdr list)))
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133 (when (cdr list)
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134 (setcdr list (cddr list)))
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135 total)))
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136
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137 ;; Delete the current line (and the next N lines).
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138 (defmacro gnus-delete-line (&optional n)
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139 `(delete-region (progn (beginning-of-line) (point))
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140 (progn (forward-line ,(or n 1)) (point))))
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141
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142 (defun gnus-byte-code (func)
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143 "Return a form that can be `eval'ed based on FUNC."
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144 (let ((fval (symbol-function func)))
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145 (if (byte-code-function-p fval)
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146 (let ((flist (append fval nil)))
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147 (setcar flist 'byte-code)
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148 flist)
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149 (cons 'progn (cddr fval)))))
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150
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151 (defun gnus-extract-address-components (from)
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152 (let (name address)
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153 ;; First find the address - the thing with the @ in it. This may
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154 ;; not be accurate in mail addresses, but does the trick most of
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155 ;; the time in news messages.
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156 (when (string-match "\\b[^@ \t<>]+[!@][^@ \t<>]+\\b" from)
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157 (setq address (substring from (match-beginning 0) (match-end 0))))
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158 ;; Then we check whether the "name <address>" format is used.
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159 (and address
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160 ;; Fix by MORIOKA Tomohiko <morioka@jaist.ac.jp>
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161 ;; Linear white space is not required.
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162 (string-match (concat "[ \t]*<" (regexp-quote address) ">") from)
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163 (and (setq name (substring from 0 (match-beginning 0)))
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164 ;; Strip any quotes from the name.
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165 (string-match "\".*\"" name)
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166 (setq name (substring name 1 (1- (match-end 0))))))
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167 ;; If not, then "address (name)" is used.
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168 (or name
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169 (and (string-match "(.+)" from)
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170 (setq name (substring from (1+ (match-beginning 0))
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171 (1- (match-end 0)))))
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172 (and (string-match "()" from)
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173 (setq name address))
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174 ;; Fix by MORIOKA Tomohiko <morioka@jaist.ac.jp>.
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175 ;; XOVER might not support folded From headers.
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176 (and (string-match "(.*" from)
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177 (setq name (substring from (1+ (match-beginning 0))
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178 (match-end 0)))))
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179 ;; Fix by Hallvard B Furuseth <h.b.furuseth@usit.uio.no>.
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180 (list (or name from) (or address from))))
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181
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182 (defun gnus-fetch-field (field)
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183 "Return the value of the header FIELD of current article."
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184 (save-excursion
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185 (save-restriction
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186 (let ((case-fold-search t)
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187 (inhibit-point-motion-hooks t))
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188 (nnheader-narrow-to-headers)
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189 (message-fetch-field field)))))
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190
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191 (defun gnus-goto-colon ()
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192 (beginning-of-line)
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193 (search-forward ":" (point-at-eol) t))
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194
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195 (defun gnus-remove-text-with-property (prop)
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196 "Delete all text in the current buffer with text property PROP."
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197 (save-excursion
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198 (goto-char (point-min))
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199 (while (not (eobp))
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200 (while (get-text-property (point) prop)
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201 (delete-char 1))
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202 (goto-char (next-single-property-change (point) prop nil (point-max))))))
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203
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204 (defun gnus-newsgroup-directory-form (newsgroup)
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205 "Make hierarchical directory name from NEWSGROUP name."
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206 (let ((newsgroup (gnus-newsgroup-savable-name newsgroup))
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207 (len (length newsgroup))
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208 idx)
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209 ;; If this is a foreign group, we don't want to translate the
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210 ;; entire name.
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211 (if (setq idx (string-match ":" newsgroup))
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212 (aset newsgroup idx ?/)
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213 (setq idx 0))
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214 ;; Replace all occurrences of `.' with `/'.
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215 (while (< idx len)
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216 (when (= (aref newsgroup idx) ?.)
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217 (aset newsgroup idx ?/))
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218 (setq idx (1+ idx)))
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219 newsgroup))
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220
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221 (defun gnus-newsgroup-savable-name (group)
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222 ;; Replace any slashes in a group name (eg. an ange-ftp nndoc group)
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223 ;; with dots.
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224 (nnheader-replace-chars-in-string group ?/ ?.))
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225
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226 (defun gnus-string> (s1 s2)
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227 (not (or (string< s1 s2)
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228 (string= s1 s2))))
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229
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230 ;;; Time functions.
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231
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232 (defun gnus-days-between (date1 date2)
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233 ;; Return the number of days between date1 and date2.
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234 (- (gnus-day-number date1) (gnus-day-number date2)))
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235
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236 (defun gnus-day-number (date)
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237 (let ((dat (mapcar (lambda (s) (and s (string-to-int s)) )
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238 (timezone-parse-date date))))
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239 (timezone-absolute-from-gregorian
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240 (nth 1 dat) (nth 2 dat) (car dat))))
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241
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242 (defun gnus-time-to-day (time)
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243 "Convert TIME to day number."
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244 (let ((tim (decode-time time)))
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245 (timezone-absolute-from-gregorian
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246 (nth 4 tim) (nth 3 tim) (nth 5 tim))))
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247
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248 (defun gnus-encode-date (date)
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249 "Convert DATE to internal time."
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250 (let* ((parse (timezone-parse-date date))
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251 (date (mapcar (lambda (d) (and d (string-to-int d))) parse))
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252 (time (mapcar 'string-to-int (timezone-parse-time (aref parse 3)))))
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253 (encode-time (caddr time) (cadr time) (car time)
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254 (caddr date) (cadr date) (car date) (nth 4 date))))
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255
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256 (defun gnus-time-minus (t1 t2)
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257 "Subtract two internal times."
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258 (let ((borrow (< (cadr t1) (cadr t2))))
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259 (list (- (car t1) (car t2) (if borrow 1 0))
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260 (- (+ (if borrow 65536 0) (cadr t1)) (cadr t2)))))
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261
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262 (defun gnus-time-less (t1 t2)
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263 "Say whether time T1 is less than time T2."
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264 (or (< (car t1) (car t2))
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265 (and (= (car t1) (car t2))
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266 (< (nth 1 t1) (nth 1 t2)))))
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267
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268 (defun gnus-file-newer-than (file date)
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269 (let ((fdate (nth 5 (file-attributes file))))
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270 (or (> (car fdate) (car date))
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271 (and (= (car fdate) (car date))
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272 (> (nth 1 fdate) (nth 1 date))))))
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273
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274 ;;; Keymap macros.
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275
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276 (defmacro gnus-local-set-keys (&rest plist)
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277 "Set the keys in PLIST in the current keymap."
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278 `(gnus-define-keys-1 (current-local-map) ',plist))
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279
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280 (defmacro gnus-define-keys (keymap &rest plist)
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281 "Define all keys in PLIST in KEYMAP."
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282 `(gnus-define-keys-1 (quote ,keymap) (quote ,plist)))
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283
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284 (defmacro gnus-define-keys-safe (keymap &rest plist)
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285 "Define all keys in PLIST in KEYMAP without overwriting previous definitions."
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286 `(gnus-define-keys-1 (quote ,keymap) (quote ,plist) t))
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287
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288 (put 'gnus-define-keys 'lisp-indent-function 1)
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289 (put 'gnus-define-keys-safe 'lisp-indent-function 1)
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290 (put 'gnus-local-set-keys 'lisp-indent-function 1)
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291
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292 (defmacro gnus-define-keymap (keymap &rest plist)
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293 "Define all keys in PLIST in KEYMAP."
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294 `(gnus-define-keys-1 ,keymap (quote ,plist)))
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295
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296 (put 'gnus-define-keymap 'lisp-indent-function 1)
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297
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298 (defun gnus-define-keys-1 (keymap plist &optional safe)
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299 (when (null keymap)
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300 (error "Can't set keys in a null keymap"))
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301 (cond ((symbolp keymap)
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302 (setq keymap (symbol-value keymap)))
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303 ((keymapp keymap))
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304 ((listp keymap)
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305 (set (car keymap) nil)
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306 (define-prefix-command (car keymap))
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307 (define-key (symbol-value (caddr keymap)) (cadr keymap) (car keymap))
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308 (setq keymap (symbol-value (car keymap)))))
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309 (let (key)
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310 (while plist
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311 (when (symbolp (setq key (pop plist)))
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312 (setq key (symbol-value key)))
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313 (if (or (not safe)
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314 (eq (lookup-key keymap key) 'undefined))
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315 (define-key keymap key (pop plist))
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316 (pop plist)))))
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317
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318 (defun gnus-completing-read (default prompt &rest args)
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319 ;; Like `completing-read', except that DEFAULT is the default argument.
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320 (let* ((prompt (if default
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321 (concat prompt " (default " default ") ")
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322 (concat prompt " ")))
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323 (answer (apply 'completing-read prompt args)))
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324 (if (or (null answer) (zerop (length answer)))
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325 default
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326 answer)))
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327
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328 ;; Two silly functions to ensure that all `y-or-n-p' questions clear
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329 ;; the echo area.
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330 (defun gnus-y-or-n-p (prompt)
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331 (prog1
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332 (y-or-n-p prompt)
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333 (message "")))
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334
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335 (defun gnus-yes-or-no-p (prompt)
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336 (prog1
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337 (yes-or-no-p prompt)
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338 (message "")))
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339
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340 ;; I suspect there's a better way, but I haven't taken the time to do
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341 ;; it yet. -erik selberg@cs.washington.edu
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342 (defun gnus-dd-mmm (messy-date)
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343 "Return a string like DD-MMM from a big messy string"
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344 (let ((datevec (ignore-errors (timezone-parse-date messy-date))))
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345 (if (not datevec)
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346 "??-???"
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347 (format "%2s-%s"
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348 (condition-case ()
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349 ;; Make sure leading zeroes are stripped.
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350 (number-to-string (string-to-number (aref datevec 2)))
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351 (error "??"))
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352 (capitalize
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353 (or (car
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354 (nth (1- (string-to-number (aref datevec 1)))
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355 timezone-months-assoc))
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356 "???"))))))
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357
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358 (defmacro gnus-date-get-time (date)
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359 "Convert DATE string to Emacs time.
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360 Cache the result as a text property stored in DATE."
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361 ;; Either return the cached value...
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362 `(let ((d ,date))
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363 (if (equal "" d)
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364 '(0 0)
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365 (or (get-text-property 0 'gnus-time d)
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366 ;; or compute the value...
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367 (let ((time (nnmail-date-to-time d)))
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368 ;; and store it back in the string.
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369 (put-text-property 0 1 'gnus-time time d)
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370 time)))))
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|
|
371
|
|
|
372 (defsubst gnus-time-iso8601 (time)
|
|
|
373 "Return a string of TIME in YYMMDDTHHMMSS format."
|
|
|
374 (format-time-string "%Y%m%dT%H%M%S" time))
|
|
|
375
|
|
|
376 (defun gnus-date-iso8601 (header)
|
|
|
377 "Convert the date field in HEADER to YYMMDDTHHMMSS"
|
|
|
378 (condition-case ()
|
|
|
379 (gnus-time-iso8601 (gnus-date-get-time (mail-header-date header)))
|
|
|
380 (error "")))
|
|
|
381
|
|
|
382 (defun gnus-mode-string-quote (string)
|
|
|
383 "Quote all \"%\"'s in STRING."
|
|
|
384 (save-excursion
|
|
|
385 (gnus-set-work-buffer)
|
|
|
386 (insert string)
|
|
|
387 (goto-char (point-min))
|
|
|
388 (while (search-forward "%" nil t)
|
|
|
389 (insert "%"))
|
|
|
390 (buffer-string)))
|
|
|
391
|
|
|
392 ;; Make a hash table (default and minimum size is 256).
|
|
|
393 ;; Optional argument HASHSIZE specifies the table size.
|
|
|
394 (defun gnus-make-hashtable (&optional hashsize)
|
|
|
395 (make-vector (if hashsize (max (gnus-create-hash-size hashsize) 256) 256) 0))
|
|
|
396
|
|
|
397 ;; Make a number that is suitable for hashing; bigger than MIN and
|
|
|
398 ;; equal to some 2^x. Many machines (such as sparcs) do not have a
|
|
|
399 ;; hardware modulo operation, so they implement it in software. On
|
|
|
400 ;; many sparcs over 50% of the time to intern is spent in the modulo.
|
|
|
401 ;; Yes, it's slower than actually computing the hash from the string!
|
|
|
402 ;; So we use powers of 2 so people can optimize the modulo to a mask.
|
|
|
403 (defun gnus-create-hash-size (min)
|
|
|
404 (let ((i 1))
|
|
|
405 (while (< i min)
|
|
|
406 (setq i (* 2 i)))
|
|
|
407 i))
|
|
|
408
|
|
|
409 (defcustom gnus-verbose 7
|
|
|
410 "*Integer that says how verbose Gnus should be.
|
|
|
411 The higher the number, the more messages Gnus will flash to say what
|
|
|
412 it's doing. At zero, Gnus will be totally mute; at five, Gnus will
|
|
|
413 display most important messages; and at ten, Gnus will keep on
|
|
|
414 jabbering all the time."
|
|
|
415 :group 'gnus-start
|
|
|
416 :type 'integer)
|
|
|
417
|
|
|
418 ;; Show message if message has a lower level than `gnus-verbose'.
|
|
|
419 ;; Guideline for numbers:
|
|
|
420 ;; 1 - error messages, 3 - non-serious error messages, 5 - messages
|
|
|
421 ;; for things that take a long time, 7 - not very important messages
|
|
|
422 ;; on stuff, 9 - messages inside loops.
|
|
|
423 (defun gnus-message (level &rest args)
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|
|
424 (if (<= level gnus-verbose)
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|
|
425 (apply 'message args)
|
|
|
426 ;; We have to do this format thingy here even if the result isn't
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|
|
427 ;; shown - the return value has to be the same as the return value
|
|
|
428 ;; from `message'.
|
|
|
429 (apply 'format args)))
|
|
|
430
|
|
|
431 (defun gnus-error (level &rest args)
|
|
|
432 "Beep an error if LEVEL is equal to or less than `gnus-verbose'."
|
|
|
433 (when (<= (floor level) gnus-verbose)
|
|
|
434 (apply 'message args)
|
|
|
435 (ding)
|
|
|
436 (let (duration)
|
|
|
437 (when (and (floatp level)
|
|
|
438 (not (zerop (setq duration (* 10 (- level (floor level)))))))
|
|
|
439 (sit-for duration))))
|
|
|
440 nil)
|
|
|
441
|
|
|
442 (defun gnus-split-references (references)
|
|
|
443 "Return a list of Message-IDs in REFERENCES."
|
|
|
444 (let ((beg 0)
|
|
|
445 ids)
|
|
|
446 (while (string-match "<[^>]+>" references beg)
|
|
|
447 (push (substring references (match-beginning 0) (setq beg (match-end 0)))
|
|
|
448 ids))
|
|
|
449 (nreverse ids)))
|
|
|
450
|
|
|
451 (defun gnus-parent-id (references &optional n)
|
|
|
452 "Return the last Message-ID in REFERENCES.
|
|
|
453 If N, return the Nth ancestor instead."
|
|
|
454 (when references
|
|
|
455 (let ((ids (inline (gnus-split-references references))))
|
|
|
456 (car (last ids (or n 1))))))
|
|
|
457
|
|
|
458 (defun gnus-buffer-live-p (buffer)
|
|
|
459 "Say whether BUFFER is alive or not."
|
|
|
460 (and buffer
|
|
|
461 (get-buffer buffer)
|
|
|
462 (buffer-name (get-buffer buffer))))
|
|
|
463
|
|
|
464 (defun gnus-horizontal-recenter ()
|
|
|
465 "Recenter the current buffer horizontally."
|
|
|
466 (if (< (current-column) (/ (window-width) 2))
|
|
|
467 (set-window-hscroll (get-buffer-window (current-buffer) t) 0)
|
|
|
468 (let* ((orig (point))
|
|
|
469 (end (window-end (get-buffer-window (current-buffer) t)))
|
|
|
470 (max 0))
|
|
|
471 ;; Find the longest line currently displayed in the window.
|
|
|
472 (goto-char (window-start))
|
|
|
473 (while (and (not (eobp))
|
|
|
474 (< (point) end))
|
|
|
475 (end-of-line)
|
|
|
476 (setq max (max max (current-column)))
|
|
|
477 (forward-line 1))
|
|
|
478 (goto-char orig)
|
|
|
479 ;; Scroll horizontally to center (sort of) the point.
|
|
|
480 (if (> max (window-width))
|
|
|
481 (set-window-hscroll
|
|
|
482 (get-buffer-window (current-buffer) t)
|
|
|
483 (min (- (current-column) (/ (window-width) 3))
|
|
|
484 (+ 2 (- max (window-width)))))
|
|
|
485 (set-window-hscroll (get-buffer-window (current-buffer) t) 0))
|
|
|
486 max)))
|
|
|
487
|
|
|
488 (defun gnus-read-event-char ()
|
|
|
489 "Get the next event."
|
|
|
490 (let ((event (read-event)))
|
|
|
491 ;; should be gnus-characterp, but this can't be called in XEmacs anyway
|
|
|
492 (cons (and (numberp event) event) event)))
|
|
|
493
|
|
|
494 (defun gnus-sortable-date (date)
|
|
|
495 "Make sortable string by string-lessp from DATE.
|
|
|
496 Timezone package is used."
|
|
|
497 (condition-case ()
|
|
|
498 (progn
|
|
|
499 (setq date (inline (timezone-fix-time
|
|
|
500 date nil
|
|
|
501 (aref (inline (timezone-parse-date date)) 4))))
|
|
|
502 (inline
|
|
|
503 (timezone-make-sortable-date
|
|
|
504 (aref date 0) (aref date 1) (aref date 2)
|
|
|
505 (inline
|
|
|
506 (timezone-make-time-string
|
|
|
507 (aref date 3) (aref date 4) (aref date 5))))))
|
|
|
508 (error "")))
|
|
|
509
|
|
|
510 (defun gnus-copy-file (file &optional to)
|
|
|
511 "Copy FILE to TO."
|
|
|
512 (interactive
|
|
|
513 (list (read-file-name "Copy file: " default-directory)
|
|
|
514 (read-file-name "Copy file to: " default-directory)))
|
|
|
515 (unless to
|
|
|
516 (setq to (read-file-name "Copy file to: " default-directory)))
|
|
|
517 (when (file-directory-p to)
|
|
|
518 (setq to (concat (file-name-as-directory to)
|
|
|
519 (file-name-nondirectory file))))
|
|
|
520 (copy-file file to))
|
|
|
521
|
|
|
522 (defun gnus-kill-all-overlays ()
|
|
|
523 "Delete all overlays in the current buffer."
|
|
|
524 (when (fboundp 'overlay-lists)
|
|
|
525 (let* ((overlayss (overlay-lists))
|
|
|
526 (buffer-read-only nil)
|
|
|
527 (overlays (nconc (car overlayss) (cdr overlayss))))
|
|
|
528 (while overlays
|
|
|
529 (delete-overlay (pop overlays))))))
|
|
|
530
|
|
|
531 (defvar gnus-work-buffer " *gnus work*")
|
|
|
532
|
|
|
533 (defun gnus-set-work-buffer ()
|
|
|
534 "Put point in the empty Gnus work buffer."
|
|
|
535 (if (get-buffer gnus-work-buffer)
|
|
|
536 (progn
|
|
|
537 (set-buffer gnus-work-buffer)
|
|
|
538 (erase-buffer))
|
|
|
539 (set-buffer (get-buffer-create gnus-work-buffer))
|
|
|
540 (kill-all-local-variables)
|
|
|
541 (buffer-disable-undo (current-buffer))))
|
|
|
542
|
|
|
543 (defmacro gnus-group-real-name (group)
|
|
|
544 "Find the real name of a foreign newsgroup."
|
|
|
545 `(let ((gname ,group))
|
|
|
546 (if (string-match "^[^:]+:" gname)
|
|
|
547 (substring gname (match-end 0))
|
|
|
548 gname)))
|
|
|
549
|
|
|
550 (defun gnus-make-sort-function (funs)
|
|
|
551 "Return a composite sort condition based on the functions in FUNC."
|
|
|
552 (cond
|
|
|
553 ((not (listp funs)) funs)
|
|
|
554 ((null funs) funs)
|
|
|
555 ((cdr funs)
|
|
|
556 `(lambda (t1 t2)
|
|
|
557 ,(gnus-make-sort-function-1 (reverse funs))))
|
|
|
558 (t
|
|
|
559 (car funs))))
|
|
|
560
|
|
|
561 (defun gnus-make-sort-function-1 (funs)
|
|
|
562 "Return a composite sort condition based on the functions in FUNC."
|
|
|
563 (if (cdr funs)
|
|
|
564 `(or (,(car funs) t1 t2)
|
|
|
565 (and (not (,(car funs) t2 t1))
|
|
|
566 ,(gnus-make-sort-function-1 (cdr funs))))
|
|
|
567 `(,(car funs) t1 t2)))
|
|
|
568
|
|
|
569 (defun gnus-turn-off-edit-menu (type)
|
|
|
570 "Turn off edit meny in `gnus-TYPE-mode-map'."
|
|
|
571 (define-key (symbol-value (intern (format "gnus-%s-mode-map" type)))
|
|
|
572 [menu-bar edit] 'undefined))
|
|
|
573
|
|
|
574 (defun gnus-prin1 (form)
|
|
|
575 "Use `prin1' on FORM in the current buffer.
|
|
|
576 Bind `print-quoted' to t while printing."
|
|
|
577 (let ((print-quoted t)
|
|
|
578 print-level print-length)
|
|
|
579 (prin1 form (current-buffer))))
|
|
|
580
|
|
|
581 (defun gnus-prin1-to-string (form)
|
|
|
582 "The same as `prin1', but but `print-quoted' to t."
|
|
|
583 (let ((print-quoted t))
|
|
|
584 (prin1-to-string form)))
|
|
|
585
|
|
|
586 (defun gnus-make-directory (directory)
|
|
|
587 "Make DIRECTORY (and all its parents) if it doesn't exist."
|
|
|
588 (when (and directory
|
|
|
589 (not (file-exists-p directory)))
|
|
|
590 (make-directory directory t))
|
|
|
591 t)
|
|
|
592
|
|
|
593 (defun gnus-write-buffer (file)
|
|
|
594 "Write the current buffer's contents to FILE."
|
|
|
595 ;; Make sure the directory exists.
|
|
|
596 (gnus-make-directory (file-name-directory file))
|
|
|
597 ;; Write the buffer.
|
|
|
598 (write-region (point-min) (point-max) file nil 'quietly))
|
|
|
599
|
|
|
600 (defmacro gnus-delete-assq (key list)
|
|
|
601 `(let ((listval (eval ,list)))
|
|
|
602 (setq ,list (delq (assq ,key listval) listval))))
|
|
|
603
|
|
|
604 (defmacro gnus-delete-assoc (key list)
|
|
|
605 `(let ((listval ,list))
|
|
|
606 (setq ,list (delq (assoc ,key listval) listval))))
|
|
|
607
|
|
|
608 (defun gnus-delete-file (file)
|
|
|
609 "Delete FILE if it exists."
|
|
|
610 (when (file-exists-p file)
|
|
|
611 (delete-file file)))
|
|
|
612
|
|
|
613 (defun gnus-strip-whitespace (string)
|
|
|
614 "Return STRING stripped of all whitespace."
|
|
|
615 (while (string-match "[\r\n\t ]+" string)
|
|
|
616 (setq string (replace-match "" t t string)))
|
|
|
617 string)
|
|
|
618
|
|
|
619 (defun gnus-put-text-property-excluding-newlines (beg end prop val)
|
|
|
620 "The same as `put-text-property', but don't put this prop on any newlines in the region."
|
|
|
621 (save-match-data
|
|
|
622 (save-excursion
|
|
|
623 (save-restriction
|
|
|
624 (goto-char beg)
|
|
|
625 (while (re-search-forward "[ \t]*\n" end 'move)
|
|
|
626 (put-text-property beg (match-beginning 0) prop val)
|
|
|
627 (setq beg (point)))
|
|
|
628 (put-text-property beg (point) prop val)))))
|
|
|
629
|
|
|
630 ;;; Protected and atomic operations. dmoore@ucsd.edu 21.11.1996
|
|
|
631 ;;; The primary idea here is to try to protect internal datastructures
|
|
|
632 ;;; from becoming corrupted when the user hits C-g, or if a hook or
|
|
|
633 ;;; similar blows up. Often in Gnus multiple tables/lists need to be
|
|
|
634 ;;; updated at the same time, or information can be lost.
|
|
|
635
|
|
|
636 (defvar gnus-atomic-be-safe t
|
|
|
637 "If t, certain operations will be protected from interruption by C-g.")
|
|
|
638
|
|
|
639 (defmacro gnus-atomic-progn (&rest forms)
|
|
|
640 "Evaluate FORMS atomically, which means to protect the evaluation
|
|
|
641 from being interrupted by the user. An error from the forms themselves
|
|
|
642 will return without finishing the operation. Since interrupts from
|
|
|
643 the user are disabled, it is recommended that only the most minimal
|
|
|
644 operations are performed by FORMS. If you wish to assign many
|
|
|
645 complicated values atomically, compute the results into temporary
|
|
|
646 variables and then do only the assignment atomically."
|
|
|
647 `(let ((inhibit-quit gnus-atomic-be-safe))
|
|
|
648 ,@forms))
|
|
|
649
|
|
|
650 (put 'gnus-atomic-progn 'lisp-indent-function 0)
|
|
|
651
|
|
|
652 (defmacro gnus-atomic-progn-assign (protect &rest forms)
|
|
|
653 "Evaluate FORMS, but insure that the variables listed in PROTECT
|
|
|
654 are not changed if anything in FORMS signals an error or otherwise
|
|
|
655 non-locally exits. The variables listed in PROTECT are updated atomically.
|
|
|
656 It is safe to use gnus-atomic-progn-assign with long computations.
|
|
|
657
|
|
|
658 Note that if any of the symbols in PROTECT were unbound, they will be
|
|
|
659 set to nil on a sucessful assignment. In case of an error or other
|
|
|
660 non-local exit, it will still be unbound."
|
|
|
661 (let* ((temp-sym-map (mapcar (lambda (x) (list (make-symbol
|
|
|
662 (concat (symbol-name x)
|
|
|
663 "-tmp"))
|
|
|
664 x))
|
|
|
665 protect))
|
|
|
666 (sym-temp-map (mapcar (lambda (x) (list (cadr x) (car x)))
|
|
|
667 temp-sym-map))
|
|
|
668 (temp-sym-let (mapcar (lambda (x) (list (car x)
|
|
|
669 `(and (boundp ',(cadr x))
|
|
|
670 ,(cadr x))))
|
|
|
671 temp-sym-map))
|
|
|
672 (sym-temp-let sym-temp-map)
|
|
|
673 (temp-sym-assign (apply 'append temp-sym-map))
|
|
|
674 (sym-temp-assign (apply 'append sym-temp-map))
|
|
|
675 (result (make-symbol "result-tmp")))
|
|
|
676 `(let (,@temp-sym-let
|
|
|
677 ,result)
|
|
|
678 (let ,sym-temp-let
|
|
|
679 (setq ,result (progn ,@forms))
|
|
|
680 (setq ,@temp-sym-assign))
|
|
|
681 (let ((inhibit-quit gnus-atomic-be-safe))
|
|
|
682 (setq ,@sym-temp-assign))
|
|
|
683 ,result)))
|
|
|
684
|
|
|
685 (put 'gnus-atomic-progn-assign 'lisp-indent-function 1)
|
|
|
686 ;(put 'gnus-atomic-progn-assign 'edebug-form-spec '(sexp body))
|
|
|
687
|
|
|
688 (defmacro gnus-atomic-setq (&rest pairs)
|
|
|
689 "Similar to setq, except that the real symbols are only assigned when
|
|
|
690 there are no errors. And when the real symbols are assigned, they are
|
|
|
691 done so atomically. If other variables might be changed via side-effect,
|
|
|
692 see gnus-atomic-progn-assign. It is safe to use gnus-atomic-setq
|
|
|
693 with potentially long computations."
|
|
|
694 (let ((tpairs pairs)
|
|
|
695 syms)
|
|
|
696 (while tpairs
|
|
|
697 (push (car tpairs) syms)
|
|
|
698 (setq tpairs (cddr tpairs)))
|
|
|
699 `(gnus-atomic-progn-assign ,syms
|
|
|
700 (setq ,@pairs))))
|
|
|
701
|
|
|
702 ;(put 'gnus-atomic-setq 'edebug-form-spec '(body))
|
|
|
703
|
|
|
704
|
|
|
705 ;;; Functions for saving to babyl/mail files.
|
|
|
706
|
|
|
707 (defun gnus-output-to-rmail (filename &optional ask)
|
|
|
708 "Append the current article to an Rmail file named FILENAME."
|
|
|
709 (require 'rmail)
|
|
|
710 ;; Most of these codes are borrowed from rmailout.el.
|
|
|
711 (setq filename (expand-file-name filename))
|
|
|
712 (setq rmail-default-rmail-file filename)
|
|
|
713 (let ((artbuf (current-buffer))
|
|
|
714 (tmpbuf (get-buffer-create " *Gnus-output*")))
|
|
|
715 (save-excursion
|
|
|
716 (or (get-file-buffer filename)
|
|
|
717 (file-exists-p filename)
|
|
|
718 (if (or (not ask)
|
|
|
719 (gnus-yes-or-no-p
|
|
|
720 (concat "\"" filename "\" does not exist, create it? ")))
|
|
|
721 (let ((file-buffer (create-file-buffer filename)))
|
|
|
722 (save-excursion
|
|
|
723 (set-buffer file-buffer)
|
|
|
724 (rmail-insert-rmail-file-header)
|
|
|
725 (let ((require-final-newline nil))
|
|
|
726 (gnus-write-buffer filename)))
|
|
|
727 (kill-buffer file-buffer))
|
|
|
728 (error "Output file does not exist")))
|
|
|
729 (set-buffer tmpbuf)
|
|
|
730 (erase-buffer)
|
|
|
731 (insert-buffer-substring artbuf)
|
|
|
732 (gnus-convert-article-to-rmail)
|
|
|
733 ;; Decide whether to append to a file or to an Emacs buffer.
|
|
|
734 (let ((outbuf (get-file-buffer filename)))
|
|
|
735 (if (not outbuf)
|
|
|
736 (append-to-file (point-min) (point-max) filename)
|
|
|
737 ;; File has been visited, in buffer OUTBUF.
|
|
|
738 (set-buffer outbuf)
|
|
|
739 (let ((buffer-read-only nil)
|
|
|
740 (msg (and (boundp 'rmail-current-message)
|
|
|
741 (symbol-value 'rmail-current-message))))
|
|
|
742 ;; If MSG is non-nil, buffer is in RMAIL mode.
|
|
|
743 (when msg
|
|
|
744 (widen)
|
|
|
745 (narrow-to-region (point-max) (point-max)))
|
|
|
746 (insert-buffer-substring tmpbuf)
|
|
|
747 (when msg
|
|
|
748 (goto-char (point-min))
|
|
|
749 (widen)
|
|
|
750 (search-backward "\^_")
|
|
|
751 (narrow-to-region (point) (point-max))
|
|
|
752 (goto-char (1+ (point-min)))
|
|
|
753 (rmail-count-new-messages t)
|
|
|
754 (rmail-show-message msg))))))
|
|
|
755 (kill-buffer tmpbuf)))
|
|
|
756
|
|
|
757 (defun gnus-output-to-mail (filename &optional ask)
|
|
|
758 "Append the current article to a mail file named FILENAME."
|
|
|
759 (setq filename (expand-file-name filename))
|
|
|
760 (let ((artbuf (current-buffer))
|
|
|
761 (tmpbuf (get-buffer-create " *Gnus-output*")))
|
|
|
762 (save-excursion
|
|
|
763 ;; Create the file, if it doesn't exist.
|
|
|
764 (when (and (not (get-file-buffer filename))
|
|
|
765 (not (file-exists-p filename)))
|
|
|
766 (if (or (not ask)
|
|
|
767 (gnus-yes-or-no-p
|
|
|
768 (concat "\"" filename "\" does not exist, create it? ")))
|
|
|
769 (let ((file-buffer (create-file-buffer filename)))
|
|
|
770 (save-excursion
|
|
|
771 (set-buffer file-buffer)
|
|
|
772 (let ((require-final-newline nil))
|
|
|
773 (gnus-write-buffer filename)))
|
|
|
774 (kill-buffer file-buffer))
|
|
|
775 (error "Output file does not exist")))
|
|
|
776 (set-buffer tmpbuf)
|
|
|
777 (erase-buffer)
|
|
|
778 (insert-buffer-substring artbuf)
|
|
|
779 (goto-char (point-min))
|
|
|
780 (unless (looking-at "From ")
|
|
|
781 (insert "From nobody " (current-time-string) "\n"))
|
|
|
782 ;; Decide whether to append to a file or to an Emacs buffer.
|
|
|
783 (let ((outbuf (get-file-buffer filename)))
|
|
|
784 (if (not outbuf)
|
|
|
785 (append-to-file (point-min) (point-max) filename)
|
|
|
786 ;; File has been visited, in buffer OUTBUF.
|
|
|
787 (set-buffer outbuf)
|
|
|
788 (let ((buffer-read-only nil))
|
|
|
789 (goto-char (point-max))
|
|
|
790 (insert-buffer-substring tmpbuf)))))
|
|
|
791 (kill-buffer tmpbuf)))
|
|
|
792
|
|
|
793 (defun gnus-convert-article-to-rmail ()
|
|
|
794 "Convert article in current buffer to Rmail message format."
|
|
|
795 (let ((buffer-read-only nil))
|
|
|
796 ;; Convert article directly into Babyl format.
|
|
|
797 (goto-char (point-min))
|
|
|
798 (insert "\^L\n0, unseen,,\n*** EOOH ***\n")
|
|
|
799 (while (search-forward "\n\^_" nil t) ;single char
|
|
|
800 (replace-match "\n^_" t t)) ;2 chars: "^" and "_"
|
|
|
801 (goto-char (point-max))
|
|
|
802 (insert "\^_")))
|
|
|
803
|
|
|
804 (provide 'gnus-util)
|
|
|
805
|
|
|
806 ;;; gnus-util.el ends here
|
