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1 ;;; mh-utils.el --- mh-e code needed for both sending and reading
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2 ;; Time-stamp: <95/10/22 17:58:16 gildea>
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3
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4 ;; Copyright (C) 1993, 1995 Free Software Foundation, Inc.
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5
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6 ;; This file is part of mh-e, part of GNU Emacs.
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7
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8 ;; GNU Emacs is free software; you can redistribute it and/or modify
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9 ;; it under the terms of the GNU General Public License as published by
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10 ;; the Free Software Foundation; either version 2, or (at your option)
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11 ;; any later version.
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12
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13 ;; GNU Emacs is distributed in the hope that it will be useful,
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14 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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15 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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16 ;; GNU General Public License for more details.
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17
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18 ;; You should have received a copy of the GNU General Public License
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2
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19 ;; along with XEmacs; see the file COPYING. If not, write to the
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20 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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21 ;; Boston, MA 02111-1307, USA.
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22
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23 ;;; Synched up with: FSF 19.34.
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0
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24
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25 ;;; Commentary:
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26
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27 ;; Internal support for mh-e package.
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28
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29 ;;; Change Log:
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30
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134
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31 ;; $Id: mh-utils.el,v 1.2 1997/04/19 23:21:01 steve Exp $
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32
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33 ;;; Code:
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34
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35 ;;; Set for local environment:
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36 ;;; mh-progs and mh-lib used to be set in paths.el, which tried to
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37 ;;; figure out at build time which of several possible directories MH
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38 ;;; was installed into. But if you installed MH after building Emacs,
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39 ;;; this would almost certainly be wrong, so now we do it at run time.
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40
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41 (defvar mh-progs nil
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42 "Directory containing MH commands, such as inc, repl, and rmm.")
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43
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44 (defvar mh-lib nil
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45 "Directory containing the MH library.
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46 This directory contains, among other things,
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47 the mhl program and the components file.")
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48
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49 ;;;###autoload
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50 (put 'mh-progs 'risky-local-variable t)
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51 ;;;###autoload
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52 (put 'mh-lib 'risky-local-variable t)
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53
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54 ;;; User preferences:
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55
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134
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56 (defgroup mh-buffer nil
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57 "Layout of MH-E buffers"
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58 :prefix "mh-"
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59 :group 'mh)
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60
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61
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62 (defcustom mh-auto-folder-collect t
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63 "*Whether to start collecting MH folder names immediately in the background.
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64 Non-nil means start a background process collecting the names of all
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134
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65 folders as soon as mh-e is loaded."
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66 :type 'boolean
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67 :group 'mh)
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68
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134
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69 (defcustom mh-recursive-folders nil
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70 "*If non-nil, then commands which operate on folders do so recursively."
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71 :type 'boolean
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72 :group 'mh)
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73
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134
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74 (defcustom mh-clean-message-header nil
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75 "*Non-nil means clean headers of messages that are displayed or inserted.
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76 The variables `mh-visible-headers' and `mh-invisible-headers' control what
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134
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77 is removed."
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78 :type 'boolean
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79 :group 'mh-buffer)
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80
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134
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81 (defcustom mh-visible-headers nil
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82 "*If non-nil, contains a regexp specifying the headers to keep when cleaning.
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83 Only used if `mh-clean-message-header' is non-nil. Setting this variable
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84 overrides `mh-invisible-headers'."
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85 :type '(choice (const nil) regexp)
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86 :group 'mh-buffer)
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87
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88 (defvar mh-invisible-headers
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89 "^Received: \\|^Message-Id: \\|^Remailed-\\|^Via: \\|^Mail-from: \\|^Return-Path: \\|^Delivery-Date: \\|^In-Reply-To: \\|^Resent-"
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90 "Regexp matching lines in a message header that are not to be shown.
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91 If `mh-visible-headers' is non-nil, it is used instead to specify what
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92 to keep.")
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93
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134
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94 (defcustom mh-bury-show-buffer t
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95 "*Non-nil means that the displayed show buffer for a folder is buried."
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96 :type 'boolean
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97 :group 'mh-buffer)
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98
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134
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99 (defcustom mh-summary-height 4
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100 "*Number of lines in MH-Folder window (including the mode line)."
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101 :type 'integer
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102 :group 'mh-buffer)
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103
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104 (defvar mh-msg-number-regexp "^ *\\([0-9]+\\)"
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105 "Regexp to find the number of a message in a scan line.
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106 The message's number must be surrounded with \\( \\)")
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107
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108 (defvar mh-msg-search-regexp "^[^0-9]*%d[^0-9]"
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109 "Format string containing a regexp matching the scan listing for a message.
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110 The desired message's number will be an argument to format.")
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111
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134
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112 (defcustom mhl-formfile nil
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113 "*Name of format file to be used by mhl to show and print messages.
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114 A value of T means use the default format file.
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115 Nil means don't use mhl to format messages when showing; mhl is still used,
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116 with the default format file, to format messages when printing them.
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117 The format used should specify a non-zero value for overflowoffset so
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118 the message continues to conform to RFC 822 and mh-e can parse the headers."
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119 :type '(choice (const nil) (const t) string)
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120 :group 'mh)
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121 (put 'mhl-formfile 'info-file "mh-e")
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122
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123 (defvar mh-default-folder-for-message-function nil
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124 "Function to select a default folder for refiling or Fcc.
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125 If set to a function, that function is called with no arguments by
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126 `\\[mh-refile-msg]' and `\\[mh-to-fcc]' to get a default when
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127 prompting the user for a folder. The function is called from within a
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128 save-excursion, with point at the start of the message. It should
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129 return the folder to offer as the refile or Fcc folder, as a string
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130 with a leading `+' sign. It can also return an empty string to use no
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131 default, or NIL to calculate the default the usual way.
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132 NOTE: This variable is not an ordinary hook;
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133 It may not be a list of functions.")
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134
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135 (defvar mh-find-path-hook nil
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136 "Invoked by mh-find-path while reading the user's MH profile.")
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137
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138 (defvar mh-folder-list-change-hook nil
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139 "Invoked whenever the cached folder list `mh-folder-list' is changed.")
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140
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141 (defvar mh-show-buffer-mode-line-buffer-id "{show-%s} %d"
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142 "Format string to produce `mode-line-buffer-identification' for show buffers.
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143 First argument is folder name. Second is message number.")
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144
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145 (defvar mh-cmd-note 4
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146 "Offset to insert notation.")
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147
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148 (defvar mh-note-seq "%"
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149 "String whose first character is used to notate messages in a sequence.")
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150
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151 ;;; Internal bookkeeping variables:
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152
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153 ;; The value of `mh-folder-list-change-hook' is called whenever
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154 ;; mh-folder-list variable is set.
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155 (defvar mh-folder-list nil) ;List of folder names for completion.
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156
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157 ;; Cached value of the `Path:' component in the user's MH profile.
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158 (defvar mh-user-path nil) ;User's mail folder directory.
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159
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160 ;; An mh-draft-folder of NIL means do not use a draft folder.
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161 ;; Cached value of the `Draft-Folder:' component in the user's MH profile.
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162 (defvar mh-draft-folder nil) ;Name of folder containing draft messages.
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163
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164 ;; Cached value of the `Unseen-Sequence:' component in the user's MH profile.
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165 (defvar mh-unseen-seq nil) ;Name of the Unseen sequence.
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166
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167 ;; Cached value of the `Previous-Sequence:' component in the user's MH profile.
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168 (defvar mh-previous-seq nil) ;Name of the Previous sequence.
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169
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170 ;; Cached value of the `Inbox:' component in the user's MH profile,
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171 ;; or "+inbox" if no such component.
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172 (defvar mh-inbox nil) ;Name of the Inbox folder.
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173
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174 (defconst mh-temp-buffer " *mh-temp*") ;Name of mh-e scratch buffer.
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175
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176 (defvar mh-previous-window-config nil) ;Window configuration before mh-e command.
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177
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178 ;;; Internal variables local to a folder.
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179
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180 (defvar mh-current-folder nil) ;Name of current folder, a string.
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181
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182 (defvar mh-show-buffer nil) ;Buffer that displays message for this folder.
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183
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184 (defvar mh-folder-filename nil) ;Full path of directory for this folder.
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185
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186 (defvar mh-msg-count nil) ;Number of msgs in buffer.
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187
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188 (defvar mh-showing nil) ;If non-nil, show the message in a separate window.
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189
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190 ;;; This holds a documentation string used by describe-mode.
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191 (defun mh-showing ()
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192 "When moving to a new message in the Folder window,
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193 also show it in a separate Show window."
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194 nil)
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195
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196 (defvar mh-seq-list nil) ;The sequences of this folder. An alist of (seq . msgs).
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197
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198 (defvar mh-seen-list nil) ;List of displayed messages to be removed from the Unseen sequence.
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199
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200 ;; If non-nil, show buffer contains message with all headers.
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201 ;; If nil, show buffer contains message processed normally.
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202 (defvar mh-showing-with-headers nil) ;Showing message with headers or normally.
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203
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204
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205 ;;; mh-e macros
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206
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207 (defmacro with-mh-folder-updating (save-modification-flag-p &rest body)
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208 ;; Format is (with-mh-folder-updating (SAVE-MODIFICATION-FLAG-P) &body BODY).
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209 ;; Execute BODY, which can modify the folder buffer without having to
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210 ;; worry about file locking or the read-only flag, and return its result.
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211 ;; If SAVE-MODIFICATION-FLAG-P is non-nil, the buffer's modification
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212 ;; flag is unchanged, otherwise it is cleared.
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213 (setq save-modification-flag-p (car save-modification-flag-p)) ; CL style
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214 (` (prog1
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215 (let ((mh-folder-updating-mod-flag (buffer-modified-p))
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216 (buffer-read-only nil)
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217 (buffer-file-name nil)) ;don't let the buffer get locked
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218 (prog1
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219 (progn
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220 (,@ body))
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221 (mh-set-folder-modified-p mh-folder-updating-mod-flag)))
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222 (,@ (if (not save-modification-flag-p)
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223 '((mh-set-folder-modified-p nil)))))))
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224
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225 (put 'with-mh-folder-updating 'lisp-indent-hook 1)
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226
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227 (defmacro mh-in-show-buffer (show-buffer &rest body)
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228 ;; Format is (mh-in-show-buffer (SHOW-BUFFER) &body BODY).
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229 ;; Display buffer SHOW-BUFFER in other window and execute BODY in it.
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230 ;; Stronger than save-excursion, weaker than save-window-excursion.
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231 (setq show-buffer (car show-buffer)) ; CL style
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232 (` (let ((mh-in-show-buffer-saved-window (selected-window)))
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233 (switch-to-buffer-other-window (, show-buffer))
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234 (if mh-bury-show-buffer (bury-buffer (current-buffer)))
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235 (unwind-protect
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236 (progn
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237 (,@ body))
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238 (select-window mh-in-show-buffer-saved-window)))))
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239
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240 (put 'mh-in-show-buffer 'lisp-indent-hook 1)
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241
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242 (defmacro mh-make-seq (name msgs) (list 'cons name msgs))
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243
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244 (defmacro mh-seq-name (pair) (list 'car pair))
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245
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246 (defmacro mh-seq-msgs (pair) (list 'cdr pair))
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247
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248
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249 ;;; Ensure new buffers won't get this mode if default-major-mode is nil.
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250 (put 'mh-show-mode 'mode-class 'special)
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251
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252 (defun mh-show-mode ()
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253 "Major mode for showing messages in mh-e.
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254 The value of mh-show-mode-hook is called when a new message is displayed."
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255 (kill-all-local-variables)
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256 (setq major-mode 'mh-show-mode)
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257 (mh-set-mode-name "MH-Show")
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258 (run-hooks 'mh-show-mode-hook))
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259
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260
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261 (defun mh-maybe-show (&optional msg)
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262 ;; If in showing mode, then display the message pointed to by the cursor.
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263 (if mh-showing (mh-show msg)))
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264
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265 (defun mh-show (&optional message)
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266 "Show MESSAGE (default: message at cursor).
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267 Force a two-window display with the folder window on top (size
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268 mh-summary-height) and the show buffer below it.
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269 If the message is already visible, display the start of the message.
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270
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271 Display of the message is controlled by setting the variables
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272 `mh-clean-message-header' and `mhl-formfile'. The default behavior is
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273 to scroll uninteresting headers off the top of the window.
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274 Type \"\\[mh-header-display]\" to see the message with all its headers."
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275 (interactive)
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276 (and mh-showing-with-headers
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277 (or mhl-formfile mh-clean-message-header)
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278 (mh-invalidate-show-buffer))
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279 (mh-show-msg message))
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280
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281
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282 (defun mh-show-msg (msg)
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283 (if (not msg)
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284 (setq msg (mh-get-msg-num t)))
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285 (setq mh-showing t)
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286 (let ((folder mh-current-folder)
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287 (clean-message-header mh-clean-message-header)
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288 (show-window (get-buffer-window mh-show-buffer)))
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289 (if (not (eql (next-window (minibuffer-window)) (selected-window)))
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290 (delete-other-windows)) ; force ourself to the top window
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291 (mh-in-show-buffer (mh-show-buffer)
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292 (if (and show-window
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293 (equal (mh-msg-filename msg folder) buffer-file-name))
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294 (progn ;just back up to start
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295 (goto-char (point-min))
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296 (if (not clean-message-header)
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297 (mh-start-of-uncleaned-message)))
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298 (mh-display-msg msg folder))))
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299 (if (not (= (1+ (window-height)) (screen-height))) ;not horizontally split
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300 (shrink-window (- (window-height) mh-summary-height)))
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301 (mh-recenter nil)
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302 (if (not (memq msg mh-seen-list)) (setq mh-seen-list (cons msg mh-seen-list)))
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303 (run-hooks 'mh-show-hook))
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304
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305
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306 (defun mh-display-msg (msg-num folder)
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307 ;; Display message NUMBER of FOLDER.
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308 ;; Sets the current buffer to the show buffer.
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309 (set-buffer folder)
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310 ;; Bind variables in folder buffer in case they are local
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311 (let ((formfile mhl-formfile)
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312 (clean-message-header mh-clean-message-header)
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313 (invisible-headers mh-invisible-headers)
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314 (visible-headers mh-visible-headers)
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315 (msg-filename (mh-msg-filename msg-num))
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316 (show-buffer mh-show-buffer))
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317 (if (not (file-exists-p msg-filename))
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318 (error "Message %d does not exist" msg-num))
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319 (set-buffer show-buffer)
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320 (cond ((not (equal msg-filename buffer-file-name))
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321 (mh-unvisit-file)
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322 (erase-buffer)
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323 ;; Changing contents, so this hook needs to be reinitialized.
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324 ;; pgp.el uses this.
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325 (if (boundp 'write-contents-hooks) ;Emacs 19
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326 (kill-local-variable 'write-contents-hooks))
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0
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327 (if formfile
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328 (mh-exec-lib-cmd-output "mhl" "-nobell" "-noclear"
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329 (if (stringp formfile)
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330 (list "-form" formfile))
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331 msg-filename)
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332 (insert-file-contents msg-filename))
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333 (goto-char (point-min))
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334 (cond (clean-message-header
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335 (mh-clean-msg-header (point-min)
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336 invisible-headers
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337 visible-headers)
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338 (goto-char (point-min)))
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339 (t
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340 (mh-start-of-uncleaned-message)))
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341 ;; the parts of visiting we want to do (no locking)
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342 (or (eq buffer-undo-list t) ;don't save undo info for prev msgs
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343 (setq buffer-undo-list nil))
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344 (set-buffer-modified-p nil)
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345 (set-buffer-auto-saved)
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346 ;; the parts of set-visited-file-name we want to do (no locking)
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347 (setq buffer-file-name msg-filename)
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348 (setq buffer-backed-up nil)
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349 (auto-save-mode 1)
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350 (set-mark nil)
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351 (mh-show-mode)
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352 (setq mode-line-buffer-identification
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353 (list (format mh-show-buffer-mode-line-buffer-id
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354 folder msg-num)))
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355 (set-buffer folder)
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356 (setq mh-showing-with-headers nil)))))
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357
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358 (defun mh-start-of-uncleaned-message ()
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359 ;; position uninteresting headers off the top of the window
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360 (let ((case-fold-search t))
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361 (re-search-forward
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362 "^To:\\|^Cc:\\|^From:\\|^Subject:\\|^Date:" nil t)
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363 (beginning-of-line)
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364 (mh-recenter 0)))
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365
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366
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367 (defun mh-invalidate-show-buffer ()
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368 ;; Invalidate the show buffer so we must update it to use it.
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369 (if (get-buffer mh-show-buffer)
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370 (save-excursion
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371 (set-buffer mh-show-buffer)
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372 (mh-unvisit-file))))
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373
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374
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375 (defun mh-unvisit-file ()
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376 ;; Separate current buffer from the message file it was visiting.
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377 (or (not (buffer-modified-p))
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378 (null buffer-file-name) ;we've been here before
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379 (yes-or-no-p (format "Message %s modified; flush changes? "
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380 (file-name-nondirectory buffer-file-name)))
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381 (error "Flushing changes not confirmed"))
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382 (clear-visited-file-modtime)
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383 (unlock-buffer)
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384 (setq buffer-file-name nil))
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385
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386
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387 (defun mh-get-msg-num (error-if-no-message)
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388 ;; Return the message number of the displayed message. If the argument
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389 ;; ERROR-IF-NO-MESSAGE is non-nil, then complain if the cursor is not
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390 ;; pointing to a message.
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391 (save-excursion
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392 (beginning-of-line)
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393 (cond ((looking-at mh-msg-number-regexp)
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394 (string-to-int (buffer-substring (match-beginning 1)
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395 (match-end 1))))
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396 (error-if-no-message
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397 (error "Cursor not pointing to message"))
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398 (t nil))))
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399
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400
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401 (defun mh-msg-filename (msg &optional folder)
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402 ;; Return the file name of MESSAGE in FOLDER (default current folder).
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403 (expand-file-name (int-to-string msg)
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404 (if folder
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405 (mh-expand-file-name folder)
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406 mh-folder-filename)))
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407
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408
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409 (defun mh-clean-msg-header (start invisible-headers visible-headers)
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410 ;; Flush extraneous lines in a message header, from the given POINT to the
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411 ;; end of the message header. If VISIBLE-HEADERS is non-nil, it contains a
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412 ;; regular expression specifying the lines to display, otherwise
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413 ;; INVISIBLE-HEADERS contains a regular expression specifying lines to
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414 ;; delete from the header.
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415 (let ((case-fold-search t))
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416 (save-restriction
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417 (goto-char start)
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418 (if (search-forward "\n\n" nil 'move)
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419 (backward-char 1))
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420 (narrow-to-region start (point))
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421 (goto-char (point-min))
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422 (if visible-headers
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423 (while (< (point) (point-max))
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424 (cond ((looking-at visible-headers)
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425 (forward-line 1)
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426 (while (looking-at "[ \t]") (forward-line 1)))
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427 (t
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428 (mh-delete-line 1)
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429 (while (looking-at "[ \t]")
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430 (mh-delete-line 1)))))
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431 (while (re-search-forward invisible-headers nil t)
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432 (beginning-of-line)
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433 (mh-delete-line 1)
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434 (while (looking-at "[ \t]")
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435 (mh-delete-line 1))))
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436 (unlock-buffer))))
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437
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438
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439 (defun mh-recenter (arg)
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440 ;; Like recenter but with two improvements: nil arg means recenter,
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441 ;; and only does anything if the current buffer is in the selected
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442 ;; window. (Commands like save-some-buffers can make this false.)
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443 (if (eql (get-buffer-window (current-buffer))
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444 (selected-window))
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445 (recenter (if arg arg '(t)))))
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446
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447
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448 (defun mh-delete-line (lines)
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449 ;; Delete version of kill-line.
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450 (delete-region (point) (progn (forward-line lines) (point))))
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451
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452
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453 (defun mh-notate (msg notation offset)
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454 ;; Marks MESSAGE with the character NOTATION at position OFFSET.
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455 ;; Null MESSAGE means the message that the cursor points to.
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456 (save-excursion
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457 (if (or (null msg)
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458 (mh-goto-msg msg t t))
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459 (with-mh-folder-updating (t)
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460 (beginning-of-line)
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461 (forward-char offset)
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462 (delete-char 1)
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463 (insert notation)))))
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464
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465
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466 (defun mh-find-msg-get-num (step)
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467 ;; Return the message number of the message on the current scan line
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468 ;; or one nearby. Jumps over non-message lines, such as inc errors.
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469 ;; STEP tells whether to search forward or backward if we have to search.
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470 (or (mh-get-msg-num nil)
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471 (let ((msg-num nil)
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472 (nreverses 0))
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473 (while (and (not msg-num)
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474 (< nreverses 2))
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475 (cond ((eobp)
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476 (setq step -1)
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|
|
477 (setq nreverses (1+ nreverses)))
|
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|
478 ((bobp)
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|
479 (setq step 1)
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|
480 (setq nreverses (1+ nreverses))))
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481 (forward-line step)
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|
482 (setq msg-num (mh-get-msg-num nil)))
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|
|
483 msg-num)))
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484
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485 (defun mh-goto-msg (number &optional no-error-if-no-message dont-show)
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486 "Position the cursor at message NUMBER.
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487 Optional non-nil second argument means return nil instead of
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|
488 signaling an error if message does not exist; in this case,
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489 the cursor is positioned near where the message would have been.
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|
490 Non-nil third argument means not to show the message."
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|
491 (interactive "NGo to message: ")
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|
492 (setq number (prefix-numeric-value number)) ;Emacs 19
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|
|
493 ;; This basic routine tries to be as fast as possible,
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|
494 ;; using a binary search and minimal regexps.
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|
495 (let ((cur-msg (mh-find-msg-get-num -1))
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496 (jump-size mh-msg-count))
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497 (while (and (> jump-size 1)
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498 cur-msg
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499 (not (eq cur-msg number)))
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|
500 (cond ((< cur-msg number)
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|
501 (setq jump-size (min (- number cur-msg)
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|
502 (ash (1+ jump-size) -1)))
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|
503 (forward-line jump-size)
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|
|
504 (setq cur-msg (mh-find-msg-get-num 1)))
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|
505 (t
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|
506 (setq jump-size (min (- cur-msg number)
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|
|
507 (ash (1+ jump-size) -1)))
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|
|
508 (forward-line (- jump-size))
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|
|
509 (setq cur-msg (mh-find-msg-get-num -1)))))
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|
510 (if (eq cur-msg number)
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|
|
511 (progn
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|
512 (beginning-of-line)
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|
|
513 (or dont-show
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514 (mh-maybe-show number)
|
|
|
515 t))
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516 (if (not no-error-if-no-message)
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|
517 (error "No message %d" number)))))
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518
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519
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|
520 (defun mh-msg-search-pat (n)
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|
521 ;; Return a search pattern for message N in the scan listing.
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|
|
522 (format mh-msg-search-regexp n))
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523
|
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|
524
|
|
|
525 (defun mh-get-profile-field (field)
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|
|
526 ;; Find and return the value of FIELD in the current buffer.
|
|
|
527 ;; Returns NIL if the field is not in the buffer.
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|
|
528 (let ((case-fold-search t))
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|
|
529 (goto-char (point-min))
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|
530 (cond ((not (re-search-forward (format "^%s" field) nil t)) nil)
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|
|
531 ((looking-at "[\t ]*$") nil)
|
|
|
532 (t
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|
|
533 (re-search-forward "[\t ]*\\([^\t \n].*\\)$" nil t)
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|
|
534 (let ((start (match-beginning 1)))
|
|
|
535 (end-of-line)
|
|
|
536 (buffer-substring start (point)))))))
|
|
|
537
|
|
2
|
538 (defvar mail-user-agent 'mh-e-user-agent) ;from reporter.el 3.2
|
|
0
|
539
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|
|
540 (defun mh-find-path ()
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|
|
541 ;; Set mh-progs and mh-lib.
|
|
|
542 ;; (This step is necessary if MH was installed after this Emacs was dumped.)
|
|
|
543 ;; From profile file, set mh-user-path, mh-draft-folder,
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|
|
544 ;; mh-unseen-seq, mh-previous-seq, mh-inbox.
|
|
|
545 (mh-find-progs)
|
|
|
546 (save-excursion
|
|
|
547 ;; Be sure profile is fully expanded before switching buffers
|
|
|
548 (let ((profile (expand-file-name (or (getenv "MH") "~/.mh_profile"))))
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|
|
549 (set-buffer (get-buffer-create mh-temp-buffer))
|
|
|
550 (setq buffer-offer-save nil) ;for people who set default to t
|
|
|
551 (erase-buffer)
|
|
|
552 (condition-case err
|
|
|
553 (insert-file-contents profile)
|
|
|
554 (file-error
|
|
|
555 (mh-install profile err)))
|
|
|
556 (setq mh-user-path (mh-get-profile-field "Path:"))
|
|
|
557 (if (not mh-user-path)
|
|
|
558 (setq mh-user-path "Mail"))
|
|
|
559 (setq mh-user-path
|
|
|
560 (file-name-as-directory
|
|
|
561 (expand-file-name mh-user-path (expand-file-name "~"))))
|
|
|
562 (setq mh-draft-folder (mh-get-profile-field "Draft-Folder:"))
|
|
|
563 (if mh-draft-folder
|
|
|
564 (progn
|
|
|
565 (if (not (mh-folder-name-p mh-draft-folder))
|
|
|
566 (setq mh-draft-folder (format "+%s" mh-draft-folder)))
|
|
|
567 (if (not (file-exists-p (mh-expand-file-name mh-draft-folder)))
|
|
|
568 (error "Draft folder \"%s\" not found. Create it and try again."
|
|
|
569 (mh-expand-file-name mh-draft-folder)))))
|
|
|
570 (setq mh-inbox (mh-get-profile-field "Inbox:"))
|
|
|
571 (cond ((not mh-inbox)
|
|
|
572 (setq mh-inbox "+inbox"))
|
|
|
573 ((not (mh-folder-name-p mh-inbox))
|
|
|
574 (setq mh-inbox (format "+%s" mh-inbox))))
|
|
|
575 (setq mh-unseen-seq (mh-get-profile-field "Unseen-Sequence:"))
|
|
|
576 (if mh-unseen-seq
|
|
|
577 (setq mh-unseen-seq (intern mh-unseen-seq))
|
|
|
578 (setq mh-unseen-seq 'unseen)) ;old MH default?
|
|
|
579 (setq mh-previous-seq (mh-get-profile-field "Previous-Sequence:"))
|
|
|
580 (if mh-previous-seq
|
|
|
581 (setq mh-previous-seq (intern mh-previous-seq)))
|
|
2
|
582 (setq mail-user-agent 'mh-e-user-agent)
|
|
0
|
583 (run-hooks 'mh-find-path-hook))))
|
|
|
584
|
|
|
585 (defun mh-find-progs ()
|
|
|
586 (or (file-exists-p (expand-file-name "inc" mh-progs))
|
|
|
587 (setq mh-progs
|
|
|
588 (or (mh-path-search exec-path "inc")
|
|
|
589 (mh-path-search '("/usr/local/bin/mh/"
|
|
|
590 "/usr/local/mh/"
|
|
|
591 "/usr/bin/mh/" ;Ultrix 4.2
|
|
|
592 "/usr/new/mh/" ;Ultrix <4.2
|
|
|
593 "/usr/contrib/mh/bin/" ;BSDI
|
|
|
594 "/usr/local/bin/"
|
|
|
595 )
|
|
|
596 "inc")
|
|
|
597 mh-progs
|
|
|
598 "/usr/local/bin/")))
|
|
|
599 (or (file-exists-p (expand-file-name "mhl" mh-lib))
|
|
|
600 (setq mh-lib
|
|
|
601 (or (mh-path-search '("/usr/local/lib/mh/"
|
|
|
602 "/usr/local/mh/lib/"
|
|
|
603 "/usr/local/bin/mh/"
|
|
|
604 "/usr/lib/mh/" ;Ultrix 4.2
|
|
|
605 "/usr/new/lib/mh/" ;Ultrix <4.2
|
|
|
606 "/usr/contrib/mh/lib/" ;BSDI
|
|
|
607 )
|
|
|
608 "mhl")
|
|
|
609 (mh-path-search exec-path "mhl") ;unlikely
|
|
|
610 mh-lib
|
|
|
611 "/usr/local/lib/mh/"))))
|
|
|
612
|
|
|
613 (defun mh-path-search (path file)
|
|
|
614 ;; Search PATH, a list of directory names, for FILE.
|
|
|
615 ;; Returns the element of PATH that contains FILE, or nil if not found.
|
|
|
616 (while (and path
|
|
|
617 (not (file-exists-p (expand-file-name file (car path)))))
|
|
|
618 (setq path (cdr path)))
|
|
|
619 (car path))
|
|
|
620
|
|
|
621 (defvar mh-no-install nil) ;do not run install-mh
|
|
|
622
|
|
|
623 (defun mh-install (profile error-val)
|
|
|
624 ;; Called to do error recovery if we fail to read the profile file.
|
|
|
625 ;; If possible, initialize the MH environment.
|
|
|
626 (if (or (getenv "MH")
|
|
|
627 (file-exists-p profile)
|
|
|
628 mh-no-install)
|
|
|
629 (signal (car error-val)
|
|
|
630 (list (format "Cannot read MH profile \"%s\"" profile)
|
|
|
631 (car (cdr (cdr error-val))))))
|
|
|
632 ;; The "install-mh" command will output a short note which
|
|
|
633 ;; mh-exec-cmd will display to the user.
|
|
|
634 ;; The MH 5 version of install-mh might try prompt the user
|
|
|
635 ;; for information, which would fail here.
|
|
|
636 (mh-exec-cmd (expand-file-name "install-mh" mh-lib) "-auto")
|
|
|
637 ;; now try again to read the profile file
|
|
|
638 (erase-buffer)
|
|
|
639 (condition-case err
|
|
|
640 (insert-file-contents profile)
|
|
|
641 (file-error
|
|
|
642 (signal (car err) ;re-signal with more specific msg
|
|
|
643 (list (format "Cannot read MH profile \"%s\"" profile)
|
|
|
644 (car (cdr (cdr err))))))))
|
|
|
645
|
|
|
646
|
|
|
647 (defun mh-set-folder-modified-p (flag)
|
|
|
648 ;; Mark current folder as modified or unmodified according to FLAG.
|
|
|
649 (set-buffer-modified-p flag))
|
|
|
650
|
|
|
651
|
|
|
652 (defun mh-find-seq (name) (assoc name mh-seq-list))
|
|
|
653
|
|
|
654 (defun mh-seq-to-msgs (seq)
|
|
|
655 ;; Return a list of the messages in SEQUENCE.
|
|
|
656 (mh-seq-msgs (mh-find-seq seq)))
|
|
|
657
|
|
|
658
|
|
|
659 (defun mh-add-msgs-to-seq (msgs seq &optional internal-flag)
|
|
|
660 ;; Add MESSAGE(s) to the SEQUENCE. If optional FLAG is non-nil, do not mark
|
|
|
661 ;; the message in the scan listing or inform MH of the addition.
|
|
|
662 (let ((entry (mh-find-seq seq)))
|
|
|
663 (if (and msgs (atom msgs)) (setq msgs (list msgs)))
|
|
|
664 (if (null entry)
|
|
|
665 (setq mh-seq-list (cons (mh-make-seq seq msgs) mh-seq-list))
|
|
|
666 (if msgs (setcdr entry (append msgs (mh-seq-msgs entry)))))
|
|
|
667 (cond ((not internal-flag)
|
|
|
668 (mh-add-to-sequence seq msgs)
|
|
|
669 (mh-notate-seq seq mh-note-seq (1+ mh-cmd-note))))))
|
|
|
670
|
|
|
671 (autoload 'mh-add-to-sequence "mh-seq")
|
|
|
672 (autoload 'mh-notate-seq "mh-seq")
|
|
|
673 (autoload 'mh-read-seq-default "mh-seq")
|
|
|
674 (autoload 'mh-map-to-seq-msgs "mh-seq")
|
|
|
675
|
|
|
676
|
|
|
677 (defun mh-set-mode-name (mode-name-string)
|
|
|
678 ;; Set the mode-name and ensure that the mode line is updated.
|
|
|
679 (setq mode-name mode-name-string)
|
|
|
680 ;; Force redisplay of all buffers' mode lines to be considered.
|
|
|
681 (save-excursion (set-buffer (other-buffer)))
|
|
|
682 (set-buffer-modified-p (buffer-modified-p)))
|
|
|
683
|
|
|
684
|
|
|
685 (defun mh-prompt-for-folder (prompt default can-create)
|
|
|
686 ;; Prompt for a folder name with PROMPT. Returns the folder's name as a
|
|
|
687 ;; string. DEFAULT is used if the folder exists and the user types return.
|
|
|
688 ;; If the CAN-CREATE flag is t, then a non-existent folder is made.
|
|
|
689 (if (null default)
|
|
|
690 (setq default ""))
|
|
|
691 (let* ((prompt (format "%s folder%s" prompt
|
|
|
692 (if (equal "" default)
|
|
|
693 "? "
|
|
|
694 (format " [%s]? " default))))
|
|
|
695 read-name folder-name)
|
|
|
696 (if (null mh-folder-list)
|
|
|
697 (mh-set-folder-list))
|
|
|
698 (while (and (setq read-name (completing-read prompt mh-folder-list
|
|
|
699 nil nil "+"))
|
|
|
700 (equal read-name "")
|
|
|
701 (equal default "")))
|
|
|
702 (cond ((or (equal read-name "") (equal read-name "+"))
|
|
|
703 (setq read-name default))
|
|
|
704 ((not (mh-folder-name-p read-name))
|
|
|
705 (setq read-name (format "+%s" read-name))))
|
|
|
706 (setq folder-name read-name)
|
|
|
707 (cond ((and (> (length folder-name) 0)
|
|
|
708 (eql (aref folder-name (1- (length folder-name))) ?/))
|
|
|
709 (setq folder-name (substring folder-name 0 -1))))
|
|
|
710 (let ((new-file-p (not (file-exists-p (mh-expand-file-name folder-name)))))
|
|
|
711 (cond ((and new-file-p
|
|
|
712 (y-or-n-p
|
|
|
713 (format "Folder %s does not exist. Create it? " folder-name)))
|
|
|
714 (message "Creating %s" folder-name)
|
|
|
715 (call-process "mkdir" nil nil nil (mh-expand-file-name folder-name))
|
|
|
716 (message "Creating %s...done" folder-name)
|
|
|
717 (setq mh-folder-list (cons (list read-name) mh-folder-list))
|
|
|
718 (run-hooks 'mh-folder-list-change-hook))
|
|
|
719 (new-file-p
|
|
|
720 (error "Folder %s is not created" folder-name))
|
|
|
721 ((not (file-directory-p (mh-expand-file-name folder-name)))
|
|
|
722 (error "\"%s\" is not a directory"
|
|
|
723 (mh-expand-file-name folder-name)))
|
|
|
724 ((and (null (assoc read-name mh-folder-list))
|
|
|
725 (null (assoc (concat read-name "/") mh-folder-list)))
|
|
|
726 (setq mh-folder-list (cons (list read-name) mh-folder-list))
|
|
|
727 (run-hooks 'mh-folder-list-change-hook))))
|
|
|
728 folder-name))
|
|
|
729
|
|
|
730
|
|
|
731 (defvar mh-make-folder-list-process nil) ;The background process collecting the folder list.
|
|
|
732
|
|
|
733 (defvar mh-folder-list-temp nil) ;mh-folder-list as it is being built.
|
|
|
734
|
|
|
735 (defvar mh-folder-list-partial-line "") ;Start of last incomplete line from folder process.
|
|
|
736
|
|
|
737 (defun mh-set-folder-list ()
|
|
|
738 ;; Sets mh-folder-list correctly.
|
|
|
739 ;; A useful function for the command line or for when you need to
|
|
|
740 ;; sync by hand. Format is in a form suitable for completing read.
|
|
|
741 (message "Collecting folder names...")
|
|
|
742 (if (not mh-make-folder-list-process)
|
|
|
743 (mh-make-folder-list-background))
|
|
|
744 (while (eq (process-status mh-make-folder-list-process) 'run)
|
|
|
745 (accept-process-output mh-make-folder-list-process))
|
|
|
746 (setq mh-folder-list mh-folder-list-temp)
|
|
|
747 (run-hooks 'mh-folder-list-change-hook)
|
|
|
748 (setq mh-folder-list-temp nil)
|
|
|
749 (delete-process mh-make-folder-list-process)
|
|
|
750 (setq mh-make-folder-list-process nil)
|
|
|
751 (message "Collecting folder names...done"))
|
|
|
752
|
|
|
753 (defun mh-make-folder-list-background ()
|
|
|
754 ;; Start a background process to compute a list of the user's folders.
|
|
|
755 ;; Call mh-set-folder-list to wait for the result.
|
|
|
756 (cond
|
|
|
757 ((not mh-make-folder-list-process)
|
|
|
758 (mh-find-path)
|
|
|
759 (let ((process-connection-type nil))
|
|
|
760 (setq mh-make-folder-list-process
|
|
|
761 (start-process "folders" nil (expand-file-name "folders" mh-progs)
|
|
|
762 "-fast"
|
|
|
763 (if mh-recursive-folders
|
|
|
764 "-recurse"
|
|
|
765 "-norecurse")))
|
|
|
766 (set-process-filter mh-make-folder-list-process
|
|
|
767 'mh-make-folder-list-filter)
|
|
|
768 (process-kill-without-query mh-make-folder-list-process)))))
|
|
|
769
|
|
|
770 (defun mh-make-folder-list-filter (process output)
|
|
|
771 ;; parse output from "folders -fast"
|
|
|
772 (let ((position 0)
|
|
|
773 line-end
|
|
|
774 new-folder
|
|
|
775 (prevailing-match-data (match-data)))
|
|
|
776 (unwind-protect
|
|
|
777 ;; make sure got complete line
|
|
|
778 (while (setq line-end (string-match "\n" output position))
|
|
|
779 (setq new-folder (format "+%s%s"
|
|
|
780 mh-folder-list-partial-line
|
|
|
781 (substring output position line-end)))
|
|
|
782 (setq mh-folder-list-partial-line "")
|
|
|
783 ;; is new folder a subfolder of previous?
|
|
|
784 (if (and mh-folder-list-temp
|
|
|
785 (string-match
|
|
|
786 (regexp-quote
|
|
|
787 (concat (car (car mh-folder-list-temp)) "/"))
|
|
|
788 new-folder))
|
|
|
789 ;; append slash to parent folder for better completion
|
|
|
790 ;; (undone by mh-prompt-for-folder)
|
|
|
791 (setq mh-folder-list-temp
|
|
|
792 (cons
|
|
|
793 (list new-folder)
|
|
|
794 (cons
|
|
|
795 (list (concat (car (car mh-folder-list-temp)) "/"))
|
|
|
796 (cdr mh-folder-list-temp))))
|
|
|
797 (setq mh-folder-list-temp
|
|
|
798 (cons (list new-folder)
|
|
|
799 mh-folder-list-temp)))
|
|
|
800 (setq position (1+ line-end)))
|
|
|
801 (store-match-data prevailing-match-data))
|
|
|
802 (setq mh-folder-list-partial-line (substring output position))))
|
|
|
803
|
|
|
804
|
|
|
805 (defun mh-folder-name-p (name)
|
|
|
806 ;; Return non-NIL if NAME is possibly the name of a folder.
|
|
|
807 ;; A name (a string or symbol) can be a folder name if it begins with "+".
|
|
|
808 (if (symbolp name)
|
|
|
809 (eql (aref (symbol-name name) 0) ?+)
|
|
|
810 (and (> (length name) 0)
|
|
|
811 (eql (aref name 0) ?+))))
|
|
|
812
|
|
|
813
|
|
|
814 ;;; Issue commands to MH.
|
|
|
815
|
|
|
816
|
|
|
817 (defun mh-exec-cmd (command &rest args)
|
|
|
818 ;; Execute mh-command COMMAND with ARGS.
|
|
|
819 ;; The side effects are what is desired.
|
|
|
820 ;; Any output is assumed to be an error and is shown to the user.
|
|
|
821 ;; The output is not read or parsed by mh-e.
|
|
|
822 (save-excursion
|
|
|
823 (set-buffer (get-buffer-create mh-temp-buffer))
|
|
|
824 (erase-buffer)
|
|
|
825 (apply 'call-process
|
|
|
826 (expand-file-name command mh-progs) nil t nil
|
|
|
827 (mh-list-to-string args))
|
|
|
828 (if (> (buffer-size) 0)
|
|
|
829 (save-window-excursion
|
|
|
830 (switch-to-buffer-other-window mh-temp-buffer)
|
|
|
831 (sit-for 5)))))
|
|
|
832
|
|
|
833
|
|
|
834 (defun mh-exec-cmd-error (env command &rest args)
|
|
|
835 ;; In environment ENV, execute mh-command COMMAND with args ARGS.
|
|
|
836 ;; ENV is nil or a string of space-separated "var=value" elements.
|
|
|
837 ;; Signals an error if process does not complete successfully.
|
|
|
838 (save-excursion
|
|
|
839 (set-buffer (get-buffer-create mh-temp-buffer))
|
|
|
840 (erase-buffer)
|
|
|
841 (let ((status
|
|
|
842 (if env
|
|
|
843 ;; the shell hacks necessary here shows just how broken Unix is
|
|
|
844 (apply 'call-process "/bin/sh" nil t nil "-c"
|
|
|
845 (format "%s %s ${1+\"$@\"}"
|
|
|
846 env
|
|
|
847 (expand-file-name command mh-progs))
|
|
|
848 command
|
|
|
849 (mh-list-to-string args))
|
|
|
850 (apply 'call-process
|
|
|
851 (expand-file-name command mh-progs) nil t nil
|
|
|
852 (mh-list-to-string args)))))
|
|
|
853 (mh-handle-process-error command status))))
|
|
|
854
|
|
|
855
|
|
|
856 (defun mh-exec-cmd-daemon (command &rest args)
|
|
|
857 ;; Execute MH command COMMAND with ARGS in the background.
|
|
|
858 ;; Any output from command is displayed in an asynchronous pop-up window.
|
|
|
859 (save-excursion
|
|
|
860 (set-buffer (get-buffer-create mh-temp-buffer))
|
|
|
861 (erase-buffer))
|
|
|
862 (let* ((process-connection-type nil)
|
|
|
863 (process (apply 'start-process
|
|
|
864 command nil
|
|
|
865 (expand-file-name command mh-progs)
|
|
|
866 (mh-list-to-string args))))
|
|
|
867 (set-process-filter process 'mh-process-daemon)))
|
|
|
868
|
|
|
869 (defun mh-process-daemon (process output)
|
|
|
870 ;; Process daemon that puts output into a temporary buffer.
|
|
|
871 (set-buffer (get-buffer-create mh-temp-buffer))
|
|
|
872 (insert-before-markers output)
|
|
|
873 (display-buffer mh-temp-buffer))
|
|
|
874
|
|
|
875
|
|
|
876 (defun mh-exec-cmd-quiet (raise-error command &rest args)
|
|
|
877 ;; Args are RAISE-ERROR, COMMANDS, ARGS....
|
|
|
878 ;; Execute MH command COMMAND with ARGS. ARGS is a list of strings.
|
|
|
879 ;; Return at start of mh-temp buffer, where output can be parsed and used.
|
|
|
880 ;; Returns value of call-process, which is 0 for success,
|
|
|
881 ;; unless RAISE-ERROR is non-nil, in which case an error is signaled
|
|
|
882 ;; if call-process returns non-0.
|
|
|
883 (set-buffer (get-buffer-create mh-temp-buffer))
|
|
|
884 (erase-buffer)
|
|
|
885 (let ((value
|
|
|
886 (apply 'call-process
|
|
|
887 (expand-file-name command mh-progs) nil t nil
|
|
|
888 args)))
|
|
|
889 (goto-char (point-min))
|
|
|
890 (if raise-error
|
|
|
891 (mh-handle-process-error command value)
|
|
|
892 value)))
|
|
|
893
|
|
|
894
|
|
|
895 (defun mh-exec-cmd-output (command display &rest args)
|
|
|
896 ;; Execute MH command COMMAND with DISPLAY flag and ARGS.
|
|
|
897 ;; Put the output into buffer after point. Set mark after inserted text.
|
|
|
898 ;; Output is expected to be shown to user, not parsed by mh-e.
|
|
|
899 (push-mark (point) t)
|
|
|
900 (apply 'call-process
|
|
|
901 (expand-file-name command mh-progs) nil t display
|
|
|
902 (mh-list-to-string args))
|
|
|
903 (exchange-point-and-mark))
|
|
|
904
|
|
|
905
|
|
|
906 (defun mh-exec-lib-cmd-output (command &rest args)
|
|
|
907 ;; Execute MH library command COMMAND with ARGS.
|
|
|
908 ;; Put the output into buffer after point. Set mark after inserted text.
|
|
|
909 (apply 'mh-exec-cmd-output (expand-file-name command mh-lib) nil args))
|
|
|
910
|
|
|
911
|
|
|
912 (defun mh-handle-process-error (command status)
|
|
|
913 ;; Raise error if COMMAND returned non-0 STATUS, otherwise return STATUS.
|
|
|
914 ;; STATUS is return value from call-process.
|
|
|
915 ;; Program output is in current buffer.
|
|
|
916 ;; If output is too long to include in error message, display the buffer.
|
|
|
917 (cond ((eql status 0) ;success
|
|
|
918 status)
|
|
|
919 ((stringp status) ;kill string
|
|
2
|
920 (error "%s: %s" command status))
|
|
0
|
921 (t ;exit code
|
|
|
922 (cond
|
|
|
923 ((= (buffer-size) 0) ;program produced no error message
|
|
2
|
924 (error "%s: exit code %d" command status))
|
|
0
|
925 (t
|
|
|
926 ;; will error message fit on one line?
|
|
|
927 (goto-line 2)
|
|
|
928 (if (and (< (buffer-size) (screen-width))
|
|
|
929 (eobp))
|
|
2
|
930 (error "%s"
|
|
|
931 (buffer-substring 1 (progn (goto-char 1)
|
|
0
|
932 (end-of-line)
|
|
|
933 (point))))
|
|
|
934 (display-buffer (current-buffer))
|
|
2
|
935 (error "%s failed with status %d. See error message in other window."
|
|
|
936 command status)))))))
|
|
0
|
937
|
|
|
938
|
|
|
939 (defun mh-expand-file-name (filename &optional default)
|
|
|
940 ;; Just like `expand-file-name', but also handles MH folder names.
|
|
|
941 ;; Assumes that any filename that starts with '+' is a folder name.
|
|
|
942 (if (mh-folder-name-p filename)
|
|
|
943 (expand-file-name (substring filename 1) mh-user-path)
|
|
|
944 (expand-file-name filename default)))
|
|
|
945
|
|
|
946
|
|
|
947 (defun mh-list-to-string (l)
|
|
|
948 ;; Flattens the list L and makes every element of the new list into a string.
|
|
|
949 (nreverse (mh-list-to-string-1 l)))
|
|
|
950
|
|
|
951 (defun mh-list-to-string-1 (l)
|
|
|
952 (let ((new-list nil))
|
|
|
953 (while l
|
|
|
954 (cond ((null (car l)))
|
|
|
955 ((symbolp (car l))
|
|
|
956 (setq new-list (cons (symbol-name (car l)) new-list)))
|
|
|
957 ((numberp (car l))
|
|
|
958 (setq new-list (cons (int-to-string (car l)) new-list)))
|
|
|
959 ((equal (car l) ""))
|
|
|
960 ((stringp (car l)) (setq new-list (cons (car l) new-list)))
|
|
|
961 ((listp (car l))
|
|
|
962 (setq new-list (nconc (mh-list-to-string-1 (car l))
|
|
|
963 new-list)))
|
|
|
964 (t (error "Bad element in mh-list-to-string: %s" (car l))))
|
|
|
965 (setq l (cdr l)))
|
|
|
966 new-list))
|
|
|
967
|
|
|
968 (provide 'mh-utils)
|
|
|
969
|
|
|
970 (and (not noninteractive)
|
|
|
971 mh-auto-folder-collect
|
|
|
972 (let ((mh-no-install t)) ;only get folders if MH installed
|
|
|
973 (condition-case err
|
|
|
974 (mh-make-folder-list-background)
|
|
|
975 (file-error)))) ;so don't complain if not installed
|
|
|
976
|
|
|
977 ;;; mh-utils.el ends here
|
