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1 ;;; gopher.el --- an emacs gopher client
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2
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3 ;; Copyright (C) 1992 scott snyder
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4
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5 ;; Author: scott snyder <snyder@fnald0.fnal.gov>
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6 ;; Created: 29 Jun 1992
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7 ;; Version: 1.03
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8 ;; Keywords: gopher, comm
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9
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10 ;; LCD Archive Entry:
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11 ;; gopher|scott snyder|snyder@fnald0.fnal.gov|
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12 ;; An emacs gopher client.|
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13 ;; 20-Apr-1993|1.02|~/interfaces/gopher.el.Z|
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14
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15 ;; This file is not part of GNU Emacs, but is distributed under the
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16 ;; same conditions.
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17 ;;
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18 ;; GNU Emacs is distributed in the hope that it will be useful,
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19 ;; but WITHOUT ANY WARRANTY. No author or distributor
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20 ;; accepts responsibility to anyone for the consequences of using it
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21 ;; or for whether it serves any particular purpose or works at all,
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22 ;; unless he says so in writing. Refer to the GNU Emacs General Public
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23 ;; License for full details.
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24 ;;
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25 ;; Everyone is granted permission to copy, modify and redistribute
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26 ;; GNU Emacs, but only under the conditions described in the
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27 ;; GNU Emacs General Public License. A copy of this license is
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28 ;; supposed to have been given to you along with GNU Emacs so you
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29 ;; can know your rights and responsibilities. It should be in a
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30 ;; file named COPYING. Among other things, the copyright notice
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31 ;; and this notice must be preserved on all copies.
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32 ;;
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33 ;;; Synched up with: Not in FSF.
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34 ;;
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35 ;; An emacs gopher client. Currently supports directory, text, CSO,
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36 ;; index, image, and telnet objects.
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37 ;; Requires forms.el and background.el.
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38 ;;
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39 ;; Written by scott snyder <snyder@fnald0.fnal.gov>
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40 ;; Some code borrowed from GNUS (by Masanobu UMEDA).
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41 ;; Some code (bookmarks, xterms, error handling) contributed
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42 ;; by Stewart Clamen <clamen@cs.cmu.edu>.
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43
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44 ;;; Commentary:
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45 ;; OPERATING INSTRUCTIONS
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46 ;;
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47 ;; To use, `M-x gopher'. To specify a different root server, use
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48 ;; `C-u M-x gopher'. If you want to use bookmarks, set the variable
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49 ;; gopher-support-bookmarks appropriately.
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50 ;; The command `M-x gopher-atpoint' will attempt to interpret the text
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51 ;; around point as a gopher bookmark specification and will retrieve
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52 ;; that item.
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53 ;;
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54 ;; Sample .emacs configuration:
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55 ;; (autoload 'gopher "gopher")
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56 ;; (autoload 'gopher-atpoint "gopher")
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57 ;; (setq gopher-support-bookmarks t)
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58 ;;
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59 ;; In directory mode:
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60 ;; Space, return, `f', or `e' selects the line point is on.
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61 ;; With a numeric prefix argument, select that object.
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62 ;; `q', `l', or `u' will return to the previous node.
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63 ;; `n' and `p' to the next and previous lines.
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64 ;; `a' will add an object to your bookmark list.
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65 ;; `v' will display your bookmark list.
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66 ;; `=' gives detailed information about an object.
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67 ;; In the bookmark list, all of the above (except `a'), plus:
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68 ;; `C-k' will delete an object from the bookmark list.
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69 ;; `C-y' will yank the most recently deleted bookmark object back into
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70 ;; the bookmark buffer.
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71 ;; `s' will save the bookmark list.
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72 ;; `Q' will quit gopher entirely, killing all gopher buffers.
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73 ;;
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74 ;; All commands which operate on a specific object can take an optional
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75 ;; numeric prefix argument giving the index of the object on which
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76 ;; to operate.
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77 ;;
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78 ;; In document mode:
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79 ;; Space pages forward.
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80 ;; Delete pages backward.
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81 ;; `q', `l' or `u' returns to the last node.
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82 ;;
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83 ;; In the CSO entry form:
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84 ;; `C-c RET' performs a look-up, based on the field contents
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85 ;; you've filed in.
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86 ;; `C-c l' returns to the previous node.
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87 ;;
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88 ;; Telnets:
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89 ;; If you have an X server set, gopher will try to create an xterm
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90 ;; running telnet. If not, the emacs-lisp telnet mode will be used.
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91 ;; From the emacs-lisp telnet mode, use `C-c l' to kill the session
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92 ;; and return to the previous node.
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93 ;; See also the variable gopher-telnet-command.
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94 ;;
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95 ;; Images:
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96 ;; Images are displayed using the command gopher-image-display-command.
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97 ;; The default setting for this variable uses xv.
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98 ;;
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99 ;; Note:
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100 ;; If gopher consistently hangs while trying to retrieve an object,
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101 ;; try turning on gopher-buggy-accept (which see).
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102 ;;
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103 ;; VMS notes:
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104 ;; To use this on VMS, you'll need my emacs subprocess patches (recently
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105 ;; posted on gnu.emacs.sources; if you can't find them, send me mail).
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106 ;; To be able to run telnet in a separate decterm, you'll also need
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107 ;; to (setq shell-file-name "docmd") and create the file
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108 ;; emacs_library:[etc]docmd.com containing the following:
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109 ;; $ if p1 .eqs. "-C" then p1 = ""
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110 ;; $ deass sys$input
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111 ;; $ 'p1 'p2 'p3 'p4 'p5 'p6 'p7 'p8
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112 ;; $ eoj
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113
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114 ;;; Change Log:
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115 ;;
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116 ;; Version 1.03 30-APR-1993
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117 ;; * Add a buffer-local variable gopher-obj to all gopher buffers bound
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118 ;; to the description of the object contained in that buffer.
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119 ;;
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120 ;; Version 1.02 20-APR-1993
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121 ;; * Avoid using replace-regexp in gopher-clean-text. (Suggested by
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122 ;; sbyrnes@rice.edu (Steven Byrnes)).
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123 ;; * Added gopher-port-aliases.
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124 ;; * Print ports as strings in gopher-directory-show-object.
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125 ;; * Don't (ding) when the net stream closes unexpectedly.
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126 ;; * Added image display (based on code from beldar@MicroUnity.com
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127 ;; (Gardner Cohen)).
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128 ;; * Attempt to improve error reporting.
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129 ;; * Reworked gopher-parse-bookmark to handle out-of-order fields.
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130 ;; * Added gopher-atpoint.
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131 ;; * Moved bookmark init stuff to gopher-read-bookmarks.
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132 ;; * Added gopher-quit (based on code from Thomas L|fgren
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133 ;; <tde9104@abacus.hgs.se>).
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134 ;; * Change usage of background for XEmacs.
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135 ;; (Patch from "William M. Perry" <wmperry@raisin.ucs.indiana.edu>).
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136 ;; * Added a (provide 'gopher) at end.
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137 ;; * Added `f' and `e' bindings in directory mode.
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138 ;;
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139 ;; Version 1.01
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140 ;; * Added patch suggested by Humberto Ortiz-Zuazaga
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141 ;; <zuazaga@ucunix.san.uc.EDU> to allow null Path= items in .gopherrc.
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142 ;;
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143 ;; Version 1.00 29-AUG-1992
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144 ;; * Added gopher-buggy-accept.
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145 ;; * Reworked telnet stuff to use an arbitrary command string to start up
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146 ;; the telnet process. This can be used to start the telnet in a
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147 ;; separate terminal window.
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148 ;; Based on code from Stewart Clamen.
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149 ;; * Stewart Clamen <clamen@cs.cmu.edu> added bookmarks.
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150 ;; * Added 's key binding to save bookmarks.
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151 ;; * Added a prefix argument to gopher-directory-buffer and
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152 ;; gopher-add-bookmark.
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153 ;; * Added standard emacs-lisp header.
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154 ;; * Stewart Clamen <clamen@cs.cmu.edu> added some error trapping and
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155 ;; recovery (gopher-retrieve-document-cleanly).
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156 ;; * Appended node description to the node's buffer's name.
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157 ;; * Reformat bookmark buffers when returning to them via gopher-last-node
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158 ;; or when an item is deleted.
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159 ;; * Added gopher-yank-bookmark.
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160 ;; * Added gopher-bookmark-modified-tick to prevent reformatting bookmark
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161 ;; buffers needlessly.
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162 ;;
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163 ;; Version 0.92 27-JUL-1992
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164 ;; * Added gopher-hostname-aliases.
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165 ;;
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166 ;; Version 0.91 30-JUN-1992
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167 ;; * Deal with servers which send stuff after the CR.
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168 ;; * Prevent gopher-directory-show-object from clearing the read-only flag.
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169 ;; * Allow specification of port number in `C-u M-x gopher'.
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170 ;;
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171 ;; Version 0.9 29-JUN-1992
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172 ;; * Initial release.
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173
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174 ;;; Code:
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175
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176 (require 'electric)
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177 (require 'forms)
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178
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179 ;; background has the same name as an epoch function.
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180 ;; Rename it to gopher-background...
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181 ;; also, the version i got from the archive didn't have a provide...
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182 (cond ((and (string-lessp "19" emacs-version)
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183 (not (boundp 'epoch::version)))
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184 ;; background is obsolete in emacs19: just add a & to shell-command.
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185 (defun gopher-background (command)
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186 (shell-command (concat command "&"))))
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187 (t
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188 ;; background has the same name as an epoch function.
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189 ;; Rename it to gopher-background...
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190 ;; also, the version i got from the archive didn't have a provide...
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191 (if (not (fboundp 'gopher-background))
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192 (if (fboundp 'background)
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193 (let ((old-background (symbol-function 'background)))
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194 (load-library "background")
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195 (fset 'gopher-background (symbol-function 'background))
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196 (fset 'background old-background))
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197 (load-library "background")
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198 (fset 'gopher-background (symbol-function 'background))
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199 ))
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200 ))
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201
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202 (defvar gopher-root-node (vector ?1 "root" "" "ucs_gopher" 70)
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203 "The root gopher server, as a gopher object.")
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204
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205 (defvar gopher-directory-mode-hook nil
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206 "*Invoked when entering a new gopher directory.")
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207 (defvar gopher-directory-mode-map (make-keymap)
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208 "Keymap for gopher-directory-mode.")
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209
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210 (defvar gopher-document-mode-hook nil
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211 "*Invoked when showing gopher document.")
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212 (defvar gopher-document-mode-map (make-keymap)
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213 "Keymap for gopher-document-mode.")
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214
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215 (defvar gopher-form-mode-hooks nil
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216 "*Invoked with entering a gopher form (i.e., for CSO).")
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217 (defvar gopher-form-mode-map (make-keymap)
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218 "Keymap for gopher-form-mode.")
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219
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220 (defvar gopher-tmp-buf nil
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221 "Buffer used to receive output from gopher.")
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222
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223 (defvar gopher-debug-read t
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224 "*If non-nil, show the current status about reading the gopher server output.")
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225
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226 ;; On some systems (such as SGI Iris), accept-process-output doesn't seem
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227 ;; to return for the last packet received on a connection. Turn this on
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228 ;; to work around the problem, but does anyone know what causes this?
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229 (defvar gopher-buggy-accept nil
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230 "*If non-nil, use sit-for instead of accept-process-output.
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231 If gopher consistently hangs while fetching an object, try turning this on.")
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232
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233 (defvar gopher-hostname-aliases
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234 '(("128.230.33.31" . "oliver.syr.edu"))
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235 "Emacs can't deal with raw IP addresses used as a hostname.
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236 Use this to work around...")
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237
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238 (defvar gopher-port-aliases
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239 '(("whois_port" . 43))
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240 "Some losing hosts send a port name instead of a number.
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241 Use this table to convert...")
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242
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243
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244 (defvar gopher-support-bookmarks nil
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245 "*If nil, do not implement bookmarks.
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246 If 'unix or t, read and write bookmarks to ~/.gopherrc.
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247 If a filename, read and save vector from there directly (not implemented yet).
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248 If a vector, treat as a built-in directory.")
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249
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250 (defconst gopher-bookmarks nil "Internal bookmark directory.")
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251 (defconst gopher-bookmarks-modified nil "Do bookmarks need to be saved?")
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252 (defconst gopher-killed-bookmark nil "The last bookmark object to be killed")
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253 (defconst gopher-bookmark-directory-p nil
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254 "Is this buffer a bookmark directory? A buffer-local variable.")
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255
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256 (defvar gopher-bookmark-modified-tick 0
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257 "Counts each time the bookmark vector is modified.")
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258
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259
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260 (defvar gopher-telnet-command
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261 (cond ((eq system-type 'vax-vms)
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262 (if (getenv "DECW$DISPLAY")
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263 "create/terminal/wait/window=(title=\"telnet\") telnet"))
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264 (t
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265 (if (getenv "DISPLAY")
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266 "xterm -e telnet"))
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267 )
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268 "*Command to use to start a telnet session.
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269 If this is nil, the emacs-lisp telnet package will be used.
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270 The default setting is to create a terminal window running telnet
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271 if you've specified an X server, and to use the emacs-lisp telnet otherwise.")
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272
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273
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274 (defvar gopher-image-display-command "xv -geometry +200+200"
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275 "*The command used to try to display an image object.")
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276
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277
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278 (defvar gopher-object-type-alist
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279 '(( ?0 "" gopher-document-object)
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280 ( ?1 "/" gopher-directory-object)
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281 ( ?2 " <CSO>" gopher-cso-object)
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282 ( ?3 " <error>" gopher-unimplemented-object)
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283 ( ?4 " <binhex>" gopher-binary-object)
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284 ( ?5 " <DOS>" gopher-binary-object)
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285 ( ?6 " <UU>" gopher-binary-object)
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286 ( ?7 " <?>" gopher-index-object)
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287 ( ?8 " <TEL>" gopher-telnet-object)
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288 ( ?9 " <bin>" gopher-binary-object)
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289 ( ?T " <T>" gopher-unimplemented-object)
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290 ( ?s " <)" gopher-binary-object)
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291 ( ?M " <MIME>" gopher-unimplemented-object)
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292 ( ?h " <html>" gopher-unimplemented-object)
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293 ( ?I " <image>" gopher-image-object)
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294 ( ?c " <cal>" gopher-unimplemented-object)
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295 ( ?g " <GIF>" gopher-image-object)
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296 )
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297 "*Alist describing the types of gopher objects this client know about.
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298 The keys are the gopher type characters.
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299 The second element in each list is the string to tag onto the end
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300 of an object's description, to identify it to the user.
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301 The third element is the function to use to retrieve the object.
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302 It is called with two arguments: the gopher object to retrieve and
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303 the buffer which should be returned to when the user is done
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304 with this object.")
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305
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306
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307 ;;;
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308 ;;; The data structure describing a gopher object is a vector of five elements:
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309 ;;; [ TYPE DESCR SELECTOR HOST PORT ]
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310 ;;;
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311 ;;; TYPE is the type character.
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312 ;;; DESCR is the human-readable description of the object.
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313 ;;; SELECTOR is the opaque selector to be sent to HOST to retrieve the obj.
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314 ;;; HOST is the name of the Internet host on which the object resides.
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315 ;;; PORT is the TCP/IP port on which the host is listening.
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316 ;;;
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317 ;;; The following macros set and fetch elements of this structure.
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318 ;;;
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319
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320 (defconst gopher-object-length 5)
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321
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322 (defmacro gopher-object-type (object)
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323 "Return the gopher type of OBJECT."
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324 (` (aref (, object) 0)))
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325
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326 (defmacro gopher-object-descr (object)
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327 "Return the gopher description of OBJECT."
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328 (` (aref (, object) 1)))
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329
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330 (defmacro gopher-object-selector (object)
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331 "Return the gopher selector string for OBJECT."
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332 (` (aref (, object) 2)))
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333
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334 (defmacro gopher-object-host (object)
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335 "Return the gopher hostname for OBJECT."
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336 (` (aref (, object) 3)))
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337
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338 (defmacro gopher-object-port (object)
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339 "Return the gopher TCP port number for OBJECT."
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340 (` (aref (, object) 4)))
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341
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342
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343 (defmacro gopher-set-object-type (object type)
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344 "Set the gopher type of OBJECT to TYPE."
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345 (` (aset (, object) 0 (, type))))
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346
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347 (defmacro gopher-set-object-descr (object descr)
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348 "Set the gopher description of OBJECT to DESCR."
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349 (` (aset (, object) 1 (, descr))))
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350
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351 (defmacro gopher-set-object-selector (object selector)
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352 "Set the gopher selector string for OBJECT to SELECTOR."
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353 (` (aset (, object) 2 (, selector))))
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354
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355 (defmacro gopher-set-object-host (object host)
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356 "Set the gopher hostname for OBJECT to HOST."
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357 (` (aset (, object) 3 (, host))))
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358
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359 (defmacro gopher-set-object-port (object port)
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360 "Set the gopher TCP port number for OBJECT to PORT."
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361 (` (aset (, object) 4 (, port))))
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362
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363
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364 (defmacro gopher-retrieve-document-cleanly (args handle &rest body)
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365 "Call gopher-retrieve-document with condition-case wrapped around,
|
|
|
366 applying HANDLE if appropriate."
|
|
|
367 (` (condition-case nil
|
|
|
368 (progn
|
|
|
369 (gopher-retrieve-document (,@ args))
|
|
|
370 (,@ body))
|
|
|
371 (error (, handle)))))
|
|
|
372
|
|
|
373
|
|
|
374 ;;
|
|
|
375 ;; buffer-local variables.
|
|
|
376 ;; declared here to prevent warnings from the new byte-compiler.
|
|
|
377 ;;
|
|
|
378
|
|
|
379 (defvar gopher-dir nil)
|
|
|
380 (defvar gopher-last nil)
|
|
|
381 (defvar gopher-obj nil)
|
|
|
382 (defvar gopher-telnet-process-name nil)
|
|
|
383 (defvar gopher-bookmark-buffer-tick nil)
|
|
|
384 (defvar forms-accept-action nil)
|
|
|
385
|
|
|
386
|
|
|
387 ;;;;--------------------------------------------------------------------------
|
|
|
388 ;;;; main dispatching logic.
|
|
|
389 ;;;;
|
|
|
390
|
|
|
391 ;;;###autoload
|
|
|
392 (defun gopher (&optional askserv)
|
|
|
393 "Start a gopher session. With C-u, prompt for a gopher server."
|
|
|
394 (interactive "P")
|
|
|
395 (if askserv
|
|
|
396 (progn
|
|
|
397 (gopher-set-object-host
|
|
|
398 gopher-root-node
|
|
|
399 (read-string "Gopher server: "
|
|
|
400 (gopher-object-host gopher-root-node)))
|
|
|
401
|
|
|
402 (let (portstr port)
|
|
|
403 (while (not (numberp port))
|
|
|
404 (setq portstr
|
|
|
405 (read-string "Port: "
|
|
|
406 (int-to-string
|
|
|
407 (gopher-object-port gopher-root-node))))
|
|
|
408
|
|
|
409 (setq port (condition-case nil
|
|
|
410 (car (read-from-string portstr))
|
|
|
411 (error nil)))
|
|
|
412
|
|
|
413 (if (not (numberp port))
|
|
|
414 (progn
|
|
|
415 (ding)
|
|
|
416 (message "Port must be numeric")
|
|
|
417 (sit-for 1)))
|
|
|
418 )
|
|
|
419
|
|
|
420 (gopher-set-object-port gopher-root-node port))))
|
|
|
421
|
|
|
422 (gopher-read-bookmarks)
|
|
|
423
|
|
|
424 (gopher-dispatch-object gopher-root-node nil))
|
|
|
425
|
|
|
426
|
|
|
427
|
|
|
428 ;;;###autoload
|
|
|
429 (defun gopher-atpoint nil
|
|
|
430 "Try to interpret the text around point as a gopher bookmark, and dispatch
|
|
|
431 to that object."
|
|
|
432 (interactive)
|
|
|
433
|
|
|
434 (let (bkmk)
|
|
|
435 (save-excursion
|
|
|
436 (re-search-backward "^#[ \t]*$\\|^[ \t]*$\\|\\`")
|
|
|
437 (skip-chars-forward " \t\n")
|
|
|
438 (setq bkmk (gopher-parse-bookmark)))
|
|
|
439 (if bkmk
|
|
|
440 (progn
|
|
|
441 (gopher-read-bookmarks)
|
|
|
442 (gopher-dispatch-object bkmk nil))
|
|
|
443 (error "Illformed bookmark"))))
|
|
|
444
|
|
|
445
|
|
|
446 (defun gopher-dispatch-object (obj lastbuf)
|
|
|
447 "Dispatch a gopher object depending on its type."
|
|
|
448 (let ((typedesc (assq (gopher-object-type obj) gopher-object-type-alist)))
|
|
|
449
|
|
|
450 (if typedesc
|
|
|
451 (funcall (nth 2 typedesc) obj lastbuf)
|
|
|
452 (gopher-unimplemented-object obj lastbuf))))
|
|
|
453
|
|
|
454
|
|
|
455 (defun gopher-unimplemented-object (obj lastbuf)
|
|
|
456 (error "unimplemented object type"))
|
|
|
457
|
|
|
458
|
|
|
459 ;;;;--------------------------------------------------------------------------
|
|
|
460 ;;;; utilities
|
|
|
461 ;;;;
|
|
|
462
|
|
|
463 (defun gopher-next-field nil
|
|
|
464 "Returns as a string all chars between point and the next tab or newline.
|
|
|
465 Point is advanced to after the tab (or to the end-of-line)."
|
|
|
466
|
|
|
467 (let ((beg (point)) s)
|
|
|
468 (skip-chars-forward "^\t\n")
|
|
|
469 (setq s (buffer-substring beg (point)))
|
|
|
470 (if (eq (following-char) ?\t)
|
|
|
471 (forward-char))
|
|
|
472 s))
|
|
|
473
|
|
|
474
|
|
|
475 ;; from GNUS
|
|
|
476 (defun gopher-make-local-vars (&rest pairs)
|
|
|
477 ;; Take VARIABLE-VALUE pairs and makes local variables initialized to the
|
|
|
478 ;; value.
|
|
|
479 (while pairs
|
|
|
480 (make-local-variable (car pairs))
|
|
|
481 (set (car pairs) (car (cdr pairs)))
|
|
|
482 (setq pairs (cdr (cdr pairs)))))
|
|
|
483
|
|
|
484
|
|
|
485 (defun gopher-get-tmp-buf nil
|
|
|
486 "Get a temporary buffer in which to receive gopher output."
|
|
|
487 (or (bufferp gopher-tmp-buf)
|
|
|
488 (progn
|
|
|
489 (setq gopher-tmp-buf (get-buffer-create " *gopher-tmp*"))
|
|
|
490 (buffer-flush-undo gopher-tmp-buf)))
|
|
|
491 gopher-tmp-buf)
|
|
|
492
|
|
|
493
|
|
|
494 (defun gopher-get-dir-buf (descr)
|
|
|
495 "Get a new buffer suitable for a gopher directory or document."
|
|
|
496 (let ((buf (generate-new-buffer (concat "*gopher*" descr))))
|
|
|
497 (buffer-flush-undo buf)
|
|
|
498 buf))
|
|
|
499
|
|
|
500 (fset 'gopher-get-doc-buf (symbol-function 'gopher-get-dir-buf))
|
|
|
501
|
|
|
502
|
|
|
503 (defun gopher-trim-blanks (str)
|
|
|
504 "Remove leading and trailing blanks from STR."
|
|
|
505 (string-match "\\`[ \t\n]*" str)
|
|
|
506 (substring str
|
|
|
507 (match-end 0)
|
|
|
508 (string-match "[ \t\n]*\\'" str (match-end 0))))
|
|
|
509
|
|
|
510
|
|
|
511 ;;;;--------------------------------------------------------------------------
|
|
|
512 ;;;; directory handling
|
|
|
513 ;;;;
|
|
|
514
|
|
|
515
|
|
|
516 (defun gopher-directory-object (obj oldbuf)
|
|
|
517 "Retrieve and display a gopher directory."
|
|
|
518
|
|
|
519 (let ((tmpbuf (gopher-get-tmp-buf))
|
|
|
520 (dirbuf (gopher-get-dir-buf (gopher-object-descr obj))))
|
|
|
521
|
|
|
522 ;; Get the directory...
|
|
|
523 (gopher-retrieve-document-cleanly (tmpbuf
|
|
|
524 (gopher-object-selector obj)
|
|
|
525 (gopher-object-host obj)
|
|
|
526 (gopher-object-port obj))
|
|
|
527
|
|
|
528 (progn
|
|
|
529 (kill-buffer dirbuf)
|
|
|
530 (error "Problems retrieving directory."))
|
|
|
531
|
|
|
532 ;; Parse it and store our internal representation in gopher-dir.
|
|
|
533 (switch-to-buffer dirbuf)
|
|
|
534 (gopher-make-local-vars
|
|
|
535 'gopher-dir (gopher-parse-directory tmpbuf)
|
|
|
536 'gopher-obj obj
|
|
|
537 'gopher-last oldbuf)
|
|
|
538
|
|
|
539 ;; Format it for your viewing pleasure.
|
|
|
540 (gopher-format-directory gopher-dir dirbuf)
|
|
|
541 (goto-char (point-min))
|
|
|
542 (if (> (- (point-max) (point)) 7) (forward-char 7))
|
|
|
543
|
|
|
544 ;; Turn on directory mode and put the description in the mode line.
|
|
|
545 (gopher-directory-mode)
|
|
|
546 (setq mode-line-buffer-identification (concat "Gopher: "
|
|
|
547 (gopher-object-descr obj)))
|
|
|
548 )))
|
|
|
549
|
|
|
550
|
|
|
551 (defun gopher-parse-directory (buf)
|
|
|
552 "Parse the gopher directory in buffer BUF into our internal representation.
|
|
|
553 Returns a vector of gopher objects."
|
|
|
554
|
|
|
555 (save-excursion
|
|
|
556 (set-buffer buf)
|
|
|
557 (goto-char (point-min))
|
|
|
558
|
|
|
559 (let* ((len (count-lines (point-min) (point-max)))
|
|
|
560 (dir (make-vector len nil))
|
|
|
561 (i 0))
|
|
|
562
|
|
|
563 (while (not (eobp))
|
|
|
564 (aset dir i (gopher-parse-directory-line))
|
|
|
565 (setq i (1+ i))
|
|
|
566 (forward-line 1))
|
|
|
567
|
|
|
568 dir)))
|
|
|
569
|
|
|
570
|
|
|
571 (defun gopher-parse-directory-line nil
|
|
|
572 "Parse the line containing point as a gopher directory entry.
|
|
|
573 Returns the corresponding gopher object."
|
|
|
574
|
|
|
575 (let (type descr selector host port)
|
|
|
576 (beginning-of-line)
|
|
|
577 (setq type (following-char))
|
|
|
578 (forward-char)
|
|
|
579 (setq descr (gopher-next-field))
|
|
|
580 (setq selector (gopher-next-field))
|
|
|
581 (setq host (gopher-next-field))
|
|
|
582 (setq port (gopher-next-field))
|
|
|
583
|
|
|
584 (if (string-match "^[0-9]+$" port)
|
|
|
585 (setq port (string-to-int port)))
|
|
|
586
|
|
|
587 (vector type descr selector host port)))
|
|
|
588
|
|
|
589
|
|
|
590 (defun gopher-format-directory (dir buf)
|
|
|
591 "Print the directory vector DIR into buffer BUF."
|
|
|
592
|
|
|
593 (save-excursion
|
|
|
594 (set-buffer buf)
|
|
|
595 (erase-buffer)
|
|
|
596 (let ((i 0)
|
|
|
597 (len (length dir)))
|
|
|
598 (while (< i len)
|
|
|
599 (gopher-format-directory-line (aref dir i) (1+ i))
|
|
|
600 (setq i (1+ i)))
|
|
|
601
|
|
|
602 )))
|
|
|
603
|
|
|
604
|
|
|
605 (defun gopher-format-directory-line (obj ndx)
|
|
|
606 "Insert a line describing the gopher object OBJ into the current buffer.
|
|
|
607 NDX is a numeric index to display to the left of the object description."
|
|
|
608
|
|
|
609 (let ((ndx-str (int-to-string ndx))
|
|
|
610 (typedesc (assq (gopher-object-type obj) gopher-object-type-alist)))
|
|
|
611
|
|
|
612 ;; display the index number. use 5 digits, right-justified.
|
|
|
613 (if (< (length ndx-str) 5)
|
|
|
614 (insert (make-string (- 5 (length ndx-str)) ? )))
|
|
|
615 (insert ndx-str)
|
|
|
616 (insert ". ")
|
|
|
617
|
|
|
618 ;; add the object description.
|
|
|
619 (insert (gopher-object-descr obj))
|
|
|
620
|
|
|
621 ;; add a tag indicating the gopher object type.
|
|
|
622 (insert (if typedesc
|
|
|
623 (nth 1 typedesc)
|
|
|
624 (concat " ???" (char-to-string (gopher-object-type obj)))))
|
|
|
625
|
|
|
626 (insert "\n")))
|
|
|
627
|
|
|
628
|
|
|
629 (defun gopher-directory-mode nil
|
|
|
630 "Gopher directory mode.
|
|
|
631
|
|
|
632 \\{gopher-directory-mode-map}
|
|
|
633 "
|
|
|
634 (use-local-map gopher-directory-mode-map)
|
|
|
635 (setq major-mode 'gopher-directory-mode)
|
|
|
636 (setq mode-name "gopher dir")
|
|
|
637 (run-hooks 'gopher-directory-mode-hook)
|
|
|
638 (setq buffer-read-only t)
|
|
|
639
|
|
|
640 (require 'mode-motion)
|
|
|
641 (make-local-variable 'mode-motion-hook)
|
|
|
642 (setq mode-motion-hook 'mode-motion-highlight-line)
|
|
|
643 )
|
|
|
644
|
|
|
645 ;;; keymap for directory mode
|
|
|
646 (suppress-keymap gopher-directory-mode-map)
|
|
|
647 (define-key gopher-directory-mode-map "\r" 'gopher-directory-choose)
|
|
|
648 (define-key gopher-directory-mode-map " " 'gopher-directory-choose)
|
|
|
649 (define-key gopher-directory-mode-map "l" 'gopher-last-node)
|
|
|
650 (define-key gopher-directory-mode-map "q" 'gopher-last-node)
|
|
|
651 (define-key gopher-directory-mode-map "u" 'gopher-last-node)
|
|
|
652 (define-key gopher-directory-mode-map "=" 'gopher-directory-show-object)
|
|
|
653 (define-key gopher-directory-mode-map "Q" 'gopher-quit)
|
|
|
654 (define-key gopher-directory-mode-map "f" 'gopher-directory-choose)
|
|
|
655 (define-key gopher-directory-mode-map "e" 'gopher-directory-choose)
|
|
|
656
|
|
|
657 ; Virginia Peck <vapeck@cs> Mon Aug 10 1992
|
|
|
658 (define-key gopher-directory-mode-map "n" 'next-line)
|
|
|
659 (define-key gopher-directory-mode-map "p" 'previous-line)
|
|
|
660 ;;(define-key gopher-directory-mode-map "\C-xk" 'gopher-last-node)
|
|
|
661
|
|
|
662 ; Stewart Clamen <clamen@cs.cmu.edu> Mon Aug 17 1992
|
|
|
663 (define-key gopher-directory-mode-map "v" 'gopher-display-bookmarks)
|
|
|
664 (define-key gopher-directory-mode-map "a" 'gopher-add-bookmark)
|
|
|
665 (define-key gopher-directory-mode-map "\C-k" 'gopher-delete-bookmark)
|
|
|
666 (define-key gopher-directory-mode-map "s" 'gopher-directory-save-bookmarks)
|
|
|
667 (define-key gopher-directory-mode-map "\C-y" 'gopher-yank-bookmark)
|
|
|
668
|
|
|
669 (define-key gopher-directory-mode-map 'button2 'gopher-mouse-directory-choose)
|
|
|
670 (define-key gopher-directory-mode-map 'button3 'gopher-directory-menu)
|
|
|
671
|
|
|
672
|
|
|
673 (defvar gopher-directory-menu
|
|
|
674 '("Gopher Commands"
|
|
|
675 ["Select This Link" gopher-directory-choose t]
|
|
|
676 ["Goto Last Node" gopher-last-node t]
|
|
|
677 ["Show Object Internals" gopher-directory-show-object t]
|
|
|
678 ["Quit" gopher-quit t]
|
|
|
679 ))
|
|
|
680
|
|
|
681 (defun gopher-directory-menu (event)
|
|
|
682 (interactive "e")
|
|
|
683 (mouse-set-point event)
|
|
|
684 (beginning-of-line)
|
|
|
685 (popup-menu gopher-directory-menu))
|
|
|
686
|
|
|
687 (defun gopher-mouse-directory-choose (event arg)
|
|
|
688 (interactive "e\nP")
|
|
|
689 (mouse-set-point event)
|
|
|
690 (beginning-of-line)
|
|
|
691 (gopher-directory-choose arg))
|
|
|
692
|
|
|
693
|
|
|
694 (defun gopher-directory-nth-obj (n)
|
|
|
695 "Returns the Nth object (starting at 1) in a gopher directory buffer."
|
|
|
696 (if (or (<= n 0) (> n (length gopher-dir)))
|
|
|
697 (error "Out of range."))
|
|
|
698 (aref gopher-dir (1- n)))
|
|
|
699
|
|
|
700
|
|
|
701 (defun gopher-directory-n (arg)
|
|
|
702 "Return the index of the object specified by ARG (starting at 1).
|
|
|
703 If ARG is nil, this is the index of the current line.
|
|
|
704 Otherwise, it is the value of ARG (as a prefix argument)."
|
|
|
705 (if arg
|
|
|
706 (prefix-numeric-value arg)
|
|
|
707 (if (eq (point) (point-max))
|
|
|
708 (1+ (count-lines (point-min) (point-max)))
|
|
|
709 (count-lines (point-min) (1+ (point))))))
|
|
|
710
|
|
|
711
|
|
|
712 (defun gopher-directory-obj (arg)
|
|
|
713 "Return the gopher object given by prefix arg ARG.
|
|
|
714 If it is nil, return the object given by the line point is on.
|
|
|
715 Otherwise, ARG is the index of the object."
|
|
|
716 (gopher-directory-nth-obj (gopher-directory-n arg)))
|
|
|
717
|
|
|
718
|
|
|
719 (defun gopher-directory-choose (arg)
|
|
|
720 "Choose an item from the directory, and do whatever is appropriate
|
|
|
721 based on the object's type. Default is to choose the object given by the
|
|
|
722 line the cursor is on. With numeric prefix argument N, choose object N."
|
|
|
723 (interactive "P")
|
|
|
724 (gopher-dispatch-object (gopher-directory-obj arg) (current-buffer)))
|
|
|
725
|
|
|
726
|
|
|
727 (defun gopher-directory-show-object (arg)
|
|
|
728 "Dump the internal information in a gopher object.
|
|
|
729 With numeric prefix argument N, show information about the Nth object."
|
|
|
730 (interactive "P")
|
|
|
731 (let* ((obj (gopher-directory-obj arg))
|
|
|
732 (type (gopher-object-type obj))
|
|
|
733 (typespec (assq type gopher-object-type-alist))
|
|
|
734 (typetag (if typespec (nth 1 typespec) "?"))
|
|
|
735 (typeproc (if typespec (nth 2 typespec) "?")))
|
|
|
736 (with-output-to-temp-buffer "*Gopher object*"
|
|
|
737 (princ (format "Type : %c `%s' %s\n" type typetag typeproc))
|
|
|
738 (princ (format "Description : %s\n" (gopher-object-descr obj)))
|
|
|
739 (princ (format "Selector : %s\n" (gopher-object-selector obj)))
|
|
|
740 (princ (format "Host : %s\n" (gopher-object-host obj)))
|
|
|
741 (princ (format "Port : %s\n" (gopher-object-port obj)))
|
|
|
742 (current-buffer)
|
|
|
743 ))
|
|
|
744 (shrink-window-if-larger-than-buffer (get-buffer-window "*Gopher object*"))
|
|
|
745
|
|
|
746 ;; shrink-window-if-larger-than-buffer screws these up...
|
|
|
747 (set-buffer-modified-p nil)
|
|
|
748 (setq buffer-read-only t))
|
|
|
749
|
|
|
750
|
|
|
751 (defun gopher-last-node nil
|
|
|
752 "Return to the previous gopher node.
|
|
|
753 By convention, a gopher buffer has the local variable gopher-last which
|
|
|
754 contains the buffer to which we should return."
|
|
|
755 (interactive)
|
|
|
756 (let ((oldbuf (current-buffer)))
|
|
|
757 (if gopher-last
|
|
|
758 (progn
|
|
|
759 (switch-to-buffer gopher-last)
|
|
|
760 (kill-buffer oldbuf)
|
|
|
761 (and (gopher-bookmark-directory-p)
|
|
|
762 (> gopher-bookmark-modified-tick gopher-bookmark-buffer-tick)
|
|
|
763 (let ((ppos (1- (gopher-directory-n nil))))
|
|
|
764 (gopher-format-bookmarks)
|
|
|
765 (forward-line ppos)
|
|
|
766 (if (> (- (point-max) (point)) 7) (forward-char 7)))))
|
|
|
767 (if (and gopher-support-bookmarks
|
|
|
768 gopher-bookmarks-modified
|
|
|
769 (y-or-n-p
|
|
|
770 "Changes have been made to the Bookmark directory. Save? "))
|
|
|
771 (gopher-save-bookmarks))
|
|
|
772 (kill-buffer oldbuf))))
|
|
|
773
|
|
|
774
|
|
|
775 (defun gopher-directory-save-bookmarks ()
|
|
|
776 "Save the bookmark list."
|
|
|
777 (interactive)
|
|
|
778
|
|
|
779 (if (not (gopher-bookmark-directory-p))
|
|
|
780 (error "This isn't the bookmark directory."))
|
|
|
781
|
|
|
782 (gopher-save-bookmarks))
|
|
|
783
|
|
|
784
|
|
|
785
|
|
|
786 ;;; Gopher clean-up and quit.
|
|
|
787 ;;; Originally from Thomas L|fgren <tde9104@abacus.hgs.se>
|
|
|
788
|
|
|
789 (defun gopher-quit nil
|
|
|
790 "Quit gopher, and kill all gopher buffers.
|
|
|
791 If there are unsaved changes to your bookmark directory, you will be
|
|
|
792 asked if you want to save them"
|
|
|
793 (interactive)
|
|
|
794 (if (y-or-n-p "Do you really want to kill all gopher buffers? ")
|
|
|
795 (progn
|
|
|
796 (if (and gopher-support-bookmarks
|
|
|
797 gopher-bookmarks-modified
|
|
|
798 (y-or-n-p
|
|
|
799 "Changes have been made to the Bookmark directory. Save? "))
|
|
|
800 (gopher-save-bookmarks))
|
|
|
801 (let ((buflist (buffer-list))
|
|
|
802 (case-fold-search t))
|
|
|
803 (while buflist
|
|
|
804 (if (eq (string-match "\\*gopher" (buffer-name (car buflist))) 0)
|
|
|
805 (kill-buffer (car buflist)))
|
|
|
806 (setq buflist (cdr buflist)))))))
|
|
|
807
|
|
|
808
|
|
|
809 ;;;;--------------------------------------------------------------------------
|
|
|
810 ;;;; bookmarks (Implemented originally by clamen@cs.cmu.edu)
|
|
|
811 ;;;;
|
|
|
812
|
|
|
813
|
|
|
814 (defun gopher-read-bookmarks ()
|
|
|
815 (cond ((null gopher-support-bookmarks))
|
|
|
816 ((or (equal gopher-support-bookmarks 'unix)
|
|
|
817 (equal gopher-support-bookmarks t))
|
|
|
818 (setq gopher-bookmarks
|
|
|
819 (gopher-read-unix-bookmarks)))
|
|
|
820 ((stringp gopher-support-bookmarks)
|
|
|
821 (gopher-read-lisp-bookmarks gopher-support-bookmarks))
|
|
|
822 ((vectorp gopher-support-bookmarks)
|
|
|
823 (setq gopher-bookmarks gopher-support-bookmarks))
|
|
|
824 (t
|
|
|
825 (message "Illformed gopher-bookmarks, assuming none"))))
|
|
|
826
|
|
|
827
|
|
|
828 (defun gopher-read-unix-bookmarks ()
|
|
|
829 "Read bookmarks out of ~/.gopherrc file."
|
|
|
830 (let ((rcfile "~/.gopherrc"))
|
|
|
831 (if (file-exists-p rcfile)
|
|
|
832 (let* ((rcbuf (find-file-noselect rcfile))
|
|
|
833 (bkmks (gopher-parse-bookmark-buffer rcbuf)))
|
|
|
834 (kill-buffer rcbuf)
|
|
|
835 (setq gopher-bookmarks-modified nil)
|
|
|
836 (setq gopher-bookmark-modified-tick
|
|
|
837 (1+ gopher-bookmark-modified-tick))
|
|
|
838 bkmks)
|
|
|
839 (message "No %s exists." rcfile)
|
|
|
840 nil)))
|
|
|
841
|
|
|
842 (defun gopher-parse-bookmark-buffer (buf)
|
|
|
843 "Read buffer containing bookmarks, formatted like ~.gopherrc
|
|
|
844 in UNIX gopher client."
|
|
|
845 (save-excursion
|
|
|
846 (set-buffer buf)
|
|
|
847 (goto-char (point-min))
|
|
|
848 (if (re-search-forward "^bookmarks:\n" (point-max) t)
|
|
|
849 (let (bkmk bkmks)
|
|
|
850 (while (setq bkmk (gopher-parse-bookmark))
|
|
|
851 (setq bkmks (cons bkmk bkmks)))
|
|
|
852 (apply 'vector (reverse bkmks))))))
|
|
|
853
|
|
|
854 (defun gopher-parse-bookmark-line (regexp end setf bkmk)
|
|
|
855 (save-excursion
|
|
|
856 (if (re-search-forward regexp end t)
|
|
|
857 (eval (list setf bkmk
|
|
|
858 (buffer-substring (match-beginning 1) (match-end 1))))
|
|
|
859 )))
|
|
|
860
|
|
|
861
|
|
|
862 (defun gopher-parse-bookmark ()
|
|
|
863 "Read next bookmark. Return a directory object."
|
|
|
864 (if (looking-at "^#$")
|
|
|
865 (forward-line))
|
|
|
866 (if (not (eobp))
|
|
|
867 (let ((end (save-excursion
|
|
|
868 (forward-line 5)
|
|
|
869 (point)))
|
|
|
870 (bkmk (make-vector 5 nil)))
|
|
|
871 (prog1
|
|
|
872 (and (gopher-parse-bookmark-line "^Type *= *\\(.+\\) *$" end
|
|
|
873 'gopher-set-object-type bkmk)
|
|
|
874 (gopher-parse-bookmark-line "^Name *= *\\(.*\\) *$" end
|
|
|
875 'gopher-set-object-descr bkmk)
|
|
|
876 (gopher-parse-bookmark-line "^Path *= *\\(.*\\) *$" end
|
|
|
877 'gopher-set-object-selector bkmk)
|
|
|
878 (gopher-parse-bookmark-line "^Host *= *\\(.+\\) *$" end
|
|
|
879 'gopher-set-object-host bkmk)
|
|
|
880 (gopher-parse-bookmark-line "^Port *= *\\(.+\\) *$" end
|
|
|
881 'gopher-set-object-port bkmk)
|
|
|
882 (progn
|
|
|
883 (gopher-set-object-type
|
|
|
884 bkmk (string-to-char (gopher-object-type bkmk)))
|
|
|
885 (gopher-set-object-port
|
|
|
886 bkmk (string-to-int (gopher-object-port bkmk)))
|
|
|
887 bkmk))
|
|
|
888 (goto-char end))
|
|
|
889 )))
|
|
|
890
|
|
|
891 (defun gopher-format-bookmarks ()
|
|
|
892 "Make the current buffer (which is assumed to be a bookmark buffer)
|
|
|
893 contain an up-to-date listing of the bookmark list."
|
|
|
894
|
|
|
895 (let ((buffer-read-only nil))
|
|
|
896 (erase-buffer)
|
|
|
897 (setq gopher-dir gopher-bookmarks)
|
|
|
898
|
|
|
899 ;; Format it for your viewing pleasure.
|
|
|
900 (gopher-format-directory gopher-dir (current-buffer))
|
|
|
901 (goto-char (point-min))
|
|
|
902 (if (> (- (point-max) (point)) 7) (forward-char 7))
|
|
|
903 (setq gopher-bookmark-buffer-tick gopher-bookmark-modified-tick)))
|
|
|
904
|
|
|
905 (defun gopher-display-bookmarks ()
|
|
|
906 "Retrieve and display the gopher bookmark directory."
|
|
|
907 (interactive)
|
|
|
908
|
|
|
909 (if (> (length gopher-bookmarks) 0)
|
|
|
910 (let ((oldbuf (current-buffer))
|
|
|
911 (dirbuf (gopher-get-dir-buf "*Gopher Bookmarks*")))
|
|
|
912
|
|
|
913 ;; Store our internal representation in gopher-dir.
|
|
|
914 (switch-to-buffer dirbuf)
|
|
|
915 (gopher-make-local-vars
|
|
|
916 'gopher-dir gopher-bookmarks
|
|
|
917 'gopher-bookmark-directory-p t
|
|
|
918 'gopher-bookmark-buffer-tick gopher-bookmark-modified-tick
|
|
|
919 'gopher-obj 'bookmark
|
|
|
920 'gopher-last oldbuf)
|
|
|
921
|
|
|
922 (gopher-format-bookmarks)
|
|
|
923
|
|
|
924 ;; Turn on directory mode and put the description in the mode line.
|
|
|
925 (gopher-directory-mode)
|
|
|
926 (setq mode-line-buffer-identification (concat "Gopher: *Bookmarks*"))
|
|
|
927 )
|
|
|
928 (error "No bookmarks supported.")))
|
|
|
929
|
|
|
930
|
|
|
931 (defun gopher-save-bookmarks ()
|
|
|
932 "Save bookmarks."
|
|
|
933 (cond
|
|
|
934 ((or (equal gopher-support-bookmarks 'unix)
|
|
|
935 (equal gopher-support-bookmarks t))
|
|
|
936 (gopher-save-unix-bookmarks))
|
|
|
937 ((stringp gopher-support-bookmarks)
|
|
|
938 (gopher-save-lisp-bookmarks gopher-support-bookmarks))
|
|
|
939 (t
|
|
|
940 (message "Illformed gopher-support-bookmarks, assuming none")))
|
|
|
941
|
|
|
942 (setq gopher-bookmarks-modified nil))
|
|
|
943
|
|
|
944
|
|
|
945 (defun gopher-save-unix-bookmarks ()
|
|
|
946 "Save bookmarks out to ~/.gopherrc file."
|
|
|
947 (save-excursion
|
|
|
948 (let* ((rcfile "~/.gopherrc")
|
|
|
949 (new-file-p (not (file-exists-p rcfile)))
|
|
|
950 (rcbuf (find-file-noselect rcfile)))
|
|
|
951 (set-buffer rcbuf)
|
|
|
952 (if new-file-p
|
|
|
953 (insert "bookmarks:\n")
|
|
|
954 (goto-char (point-min))
|
|
|
955 (if (re-search-forward "^bookmarks:\n" nil t)
|
|
|
956 (delete-region (point) (point-max))
|
|
|
957 (goto-char (point-max))
|
|
|
958 (insert "bookmarks:\n")))
|
|
|
959
|
|
|
960 ;; Now, insert defined bookmarks into file
|
|
|
961
|
|
|
962 (let ((obj-count 0))
|
|
|
963 (while (< obj-count (length gopher-bookmarks))
|
|
|
964 (let ((obj (aref gopher-bookmarks obj-count)))
|
|
|
965 (insert "#"
|
|
|
966 "\nType=" (gopher-object-type obj)
|
|
|
967 "\nName=" (gopher-object-descr obj)
|
|
|
968 "\nPath=" (gopher-object-selector obj)
|
|
|
969 "\nHost=" (gopher-object-host obj)
|
|
|
970 "\nPort=" (int-to-string (gopher-object-port obj))
|
|
|
971 "\n")
|
|
|
972 (setq obj-count (1+ obj-count)))))
|
|
|
973
|
|
|
974 (write-file rcfile))))
|
|
|
975
|
|
|
976
|
|
|
977 (defun gopher-add-bookmark (arg)
|
|
|
978 "Add current object to menu of bookmarks.
|
|
|
979 With numeric prefix argument N, add Nth object."
|
|
|
980 (interactive "P")
|
|
|
981 (if (gopher-bookmark-directory-p)
|
|
|
982 (error "That item is already a bookmark!")
|
|
|
983 (let ((existing-bookmarks gopher-bookmarks)
|
|
|
984 (new-bookmarks (make-vector (1+ (length gopher-bookmarks)) nil))
|
|
|
985 (obj (copy-sequence (gopher-directory-obj arg)))
|
|
|
986 (l (length gopher-bookmarks)))
|
|
|
987 (gopher-set-object-descr
|
|
|
988 obj
|
|
|
989 (read-from-minibuffer "Node Name: "
|
|
|
990 (gopher-object-descr obj)))
|
|
|
991 (aset new-bookmarks l obj)
|
|
|
992 (while (> l 0)
|
|
|
993 (progn (setq l (1- l))
|
|
|
994 (aset new-bookmarks l (aref existing-bookmarks l))))
|
|
|
995 (setq gopher-bookmarks new-bookmarks
|
|
|
996 gopher-bookmarks-modified t
|
|
|
997 gopher-bookmark-modified-tick (1+ gopher-bookmark-modified-tick))
|
|
|
998 )))
|
|
|
999
|
|
|
1000
|
|
|
1001 (defun gopher-delete-bookmark (arg)
|
|
|
1002 "Delete current bookmark.
|
|
|
1003 With numeric prefix argument N, delete Nth bookmark."
|
|
|
1004 (interactive "P")
|
|
|
1005 (if (not (gopher-bookmark-directory-p))
|
|
|
1006 (error "Can only delete object in Bookmark directory.")
|
|
|
1007 (let ((new-bookmarks (make-vector (1- (length gopher-bookmarks)) nil))
|
|
|
1008 (pos (1- (gopher-directory-n arg)))
|
|
|
1009 (l (length gopher-bookmarks))
|
|
|
1010 (i 0))
|
|
|
1011 (while (< i pos)
|
|
|
1012 (progn (aset new-bookmarks i (aref gopher-bookmarks i))
|
|
|
1013 (setq i (1+ i))))
|
|
|
1014 (while (< i (1- l))
|
|
|
1015 (progn (aset new-bookmarks i (aref gopher-bookmarks (1+ i)))
|
|
|
1016 (setq i (1+ i))))
|
|
|
1017 (setq gopher-killed-bookmark (aref gopher-bookmarks pos)
|
|
|
1018 gopher-bookmarks new-bookmarks
|
|
|
1019 gopher-dir new-bookmarks
|
|
|
1020 gopher-bookmarks-modified t
|
|
|
1021 gopher-bookmark-modified-tick (1+ gopher-bookmark-modified-tick))
|
|
|
1022 (let ((ppos (1- (gopher-directory-n nil))))
|
|
|
1023 (if (< pos ppos)
|
|
|
1024 (setq ppos (1- ppos)))
|
|
|
1025 (gopher-format-bookmarks)
|
|
|
1026 (goto-char (point-min))
|
|
|
1027 (forward-line ppos)
|
|
|
1028 (forward-char 7)))
|
|
|
1029 (if (= (point) (point-max)) (previous-line 1))
|
|
|
1030 ; (let ((buffer-read-only nil))
|
|
|
1031 ; (beginning-of-line 1)
|
|
|
1032 ; (kill-line 1)
|
|
|
1033 ; (if (= (point) (point-max)) (previous-line 1)))
|
|
|
1034 (if (zerop (length gopher-bookmarks))
|
|
|
1035 (gopher-last-node))))
|
|
|
1036
|
|
|
1037
|
|
|
1038 (defun gopher-yank-bookmark (arg)
|
|
|
1039 "Yank the most recently killed bookmark at the current position.
|
|
|
1040 With numeric prefix argument N, yank into position N."
|
|
|
1041 (interactive "P")
|
|
|
1042 (cond ((not (gopher-bookmark-directory-p))
|
|
|
1043 (error "Can only yank bookmark objects into bookmark directory."))
|
|
|
1044 ((null gopher-killed-bookmark)
|
|
|
1045 (error "No killed bookmark object"))
|
|
|
1046 (t
|
|
|
1047 (let* ((len (length gopher-bookmarks))
|
|
|
1048 (new-bookmarks (make-vector (1+ len) nil))
|
|
|
1049 (pos (1- (gopher-directory-n arg)))
|
|
|
1050 i)
|
|
|
1051
|
|
|
1052 (if (or (< pos 0) (> pos (length gopher-bookmarks)))
|
|
|
1053 (error "Out of range."))
|
|
|
1054
|
|
|
1055 (setq i (1- pos))
|
|
|
1056 (while (>= i 0)
|
|
|
1057 (aset new-bookmarks i (aref gopher-bookmarks i))
|
|
|
1058 (setq i (1- i)))
|
|
|
1059
|
|
|
1060 (aset new-bookmarks pos gopher-killed-bookmark)
|
|
|
1061
|
|
|
1062 (setq i pos)
|
|
|
1063 (while (< i len)
|
|
|
1064 (aset new-bookmarks (1+ i) (aref gopher-bookmarks i))
|
|
|
1065 (setq i (1+ i)))
|
|
|
1066
|
|
|
1067 (setq gopher-bookmarks new-bookmarks
|
|
|
1068 gopher-bookmarks-modified t
|
|
|
1069 gopher-killed-bookmark nil
|
|
|
1070 gopher-bookmark-modified-tick
|
|
|
1071 (1+ gopher-bookmark-modified-tick))
|
|
|
1072
|
|
|
1073 (let ((ppos (1- (gopher-directory-n nil))))
|
|
|
1074 (if (<= pos ppos)
|
|
|
1075 (setq ppos (1+ ppos)))
|
|
|
1076 (gopher-format-bookmarks)
|
|
|
1077 (goto-char (point-min))
|
|
|
1078 (forward-line ppos)
|
|
|
1079 (forward-char 7))
|
|
|
1080 ))))
|
|
|
1081
|
|
|
1082
|
|
|
1083 (defun gopher-bookmark-directory-p ()
|
|
|
1084 "Return T if currently displaying Bookmark directory."
|
|
|
1085 gopher-bookmark-directory-p)
|
|
|
1086 ; (equal gopher-dir gopher-bookmarks))
|
|
|
1087
|
|
|
1088
|
|
|
1089 (defun gopher-read-lisp-bookmarks (fn)
|
|
|
1090 "currently unsupported"
|
|
|
1091 (error "gopher-read-lisp-bookmark is not yet supported. Sorry."))
|
|
|
1092
|
|
|
1093 (defun gopher-save-lisp-bookmarks (fn)
|
|
|
1094 "currently unsupported"
|
|
|
1095 (error "gopher-save-lisp-bookmark is not yet supported. Sorry."))
|
|
|
1096
|
|
|
1097
|
|
|
1098
|
|
|
1099 ;;;;--------------------------------------------------------------------------
|
|
|
1100 ;;;; gopher documents
|
|
|
1101 ;;;;
|
|
|
1102
|
|
|
1103
|
|
|
1104 (defun gopher-document-object (obj oldbuf &optional end-regexp)
|
|
|
1105 "Retrieve and display a gopher document.
|
|
|
1106 Optional argument END-REGEXP is used if the data will not be ended by `.'."
|
|
|
1107
|
|
|
1108 (let ((docbuf (gopher-get-doc-buf (gopher-object-descr obj))))
|
|
|
1109
|
|
|
1110 ;; Snarf the data into the buffer.
|
|
|
1111 (gopher-retrieve-document-cleanly (docbuf
|
|
|
1112 (gopher-object-selector obj)
|
|
|
1113 (gopher-object-host obj)
|
|
|
1114 (gopher-object-port obj)
|
|
|
1115 end-regexp)
|
|
|
1116
|
|
|
1117 (progn
|
|
|
1118 (kill-buffer docbuf)
|
|
|
1119 (error "Problems retrieving document."))
|
|
|
1120
|
|
|
1121 ;; Turn on document mode and put the description in the mode line.
|
|
|
1122 (switch-to-buffer docbuf)
|
|
|
1123 (gopher-make-local-vars
|
|
|
1124 'gopher-obj obj
|
|
|
1125 'gopher-last oldbuf)
|
|
|
1126 (goto-char (point-min))
|
|
|
1127 (gopher-document-mode)
|
|
|
1128 (setq mode-line-buffer-identification (concat "Gopher: "
|
|
|
1129 (gopher-object-descr obj)))
|
|
|
1130 )))
|
|
|
1131
|
|
|
1132
|
|
|
1133 ;; keymap for document mode
|
|
|
1134 (suppress-keymap gopher-document-mode-map)
|
|
|
1135
|
|
|
1136 ;Virginia Peck <vapeck@cs> Mon Aug 10 21:44:35 1992
|
|
|
1137 ;;(define-key gopher-document-mode-map "\C-xk" 'gopher-last-node)
|
|
|
1138
|
|
|
1139 (define-key gopher-document-mode-map "l" 'gopher-last-node)
|
|
|
1140 (define-key gopher-document-mode-map "q" 'gopher-last-node)
|
|
|
1141 (define-key gopher-document-mode-map "u" 'gopher-last-node)
|
|
|
1142 (define-key gopher-document-mode-map " " 'scroll-up)
|
|
|
1143 (define-key gopher-document-mode-map "\C-?" 'scroll-down)
|
|
|
1144 (define-key gopher-document-mode-map "\r" 'gopher-scroll-one-line-up)
|
|
|
1145
|
|
|
1146
|
|
|
1147 (defun gopher-document-mode nil
|
|
|
1148 "Gopher document mode.
|
|
|
1149
|
|
|
1150 \\{gopher-document-mode-map}
|
|
|
1151 "
|
|
|
1152 (use-local-map gopher-document-mode-map)
|
|
|
1153 (setq major-mode 'gopher-document-mode)
|
|
|
1154 (setq mode-name "gopher doc")
|
|
|
1155 (run-hooks 'gopher-document-mode-hook)
|
|
|
1156 (setq buffer-read-only t))
|
|
|
1157
|
|
|
1158
|
|
|
1159 ;; from gosmacs.el
|
|
|
1160 (defun gopher-scroll-one-line-up (&optional arg)
|
|
|
1161 "Scroll the selected window up (forward in the text) one line (or N lines)."
|
|
|
1162 (interactive "p")
|
|
|
1163 (scroll-up (or arg 1)))
|
|
|
1164
|
|
|
1165
|
|
|
1166 ;;;;--------------------------------------------------------------------------
|
|
|
1167 ;;;; CSO handling.
|
|
|
1168 ;;;;
|
|
|
1169 ;;;; uses a subset of forms mode to handle data entry.
|
|
|
1170 ;;;;
|
|
|
1171
|
|
|
1172 (defun gopher-cso-object (obj oldbuf)
|
|
|
1173 "Display a CSO lookup form."
|
|
|
1174
|
|
|
1175 ;; The following will create a buffer displaying the form described
|
|
|
1176 ;; by the list in the last argument (cf. forms-mode). When the user
|
|
|
1177 ;; accepts the data in the form (by pressing `C-c RET'), the function
|
|
|
1178 ;; gopher-do-cso will be called with the data the user supplied.
|
|
|
1179 (gopher-form (gopher-object-descr obj)
|
|
|
1180 'gopher-do-cso
|
|
|
1181 4
|
|
|
1182 '("====== phone directory lookup ======"
|
|
|
1183 "\n Press `C-c RET' to lookup, `C-c l' to return to the last gopher object."
|
|
|
1184 "\n (you must fill in at least one of the first three fields)"
|
|
|
1185 "\n"
|
|
|
1186 "Name : " 1
|
|
|
1187 "\n"
|
|
|
1188 "Phone : " 2
|
|
|
1189 "\n"
|
|
|
1190 "E-Mail : " 3
|
|
|
1191 "\n"
|
|
|
1192 "Address : " 4
|
|
|
1193 ))
|
|
|
1194
|
|
|
1195 ;; Record gopher-last so gopher-last-node knows where to go.
|
|
|
1196 ;; Record gopher-obj so gopher-do-cso knows what server to query.
|
|
|
1197 (gopher-make-local-vars
|
|
|
1198 'gopher-last oldbuf
|
|
|
1199 'gopher-obj obj))
|
|
|
1200
|
|
|
1201
|
|
|
1202 (defconst gopher-cso-fields '("name" "phone" "email" "address")
|
|
|
1203 "Field names to use in CSO queries.")
|
|
|
1204
|
|
|
1205 (defun gopher-do-cso (vals)
|
|
|
1206 "Make a CSO query. VALS is the data the user entered in the form,
|
|
|
1207 as a list of strings."
|
|
|
1208
|
|
|
1209 ;; Check that the required data was provided.
|
|
|
1210 (if (zerop (+ (length (nth 0 vals))
|
|
|
1211 (length (nth 1 vals))
|
|
|
1212 (length (nth 2 vals))))
|
|
|
1213 (error "Must specify name, phone, or email."))
|
|
|
1214
|
|
|
1215 (let ((query "query")
|
|
|
1216 (fields gopher-cso-fields)
|
|
|
1217 (obj gopher-obj))
|
|
|
1218
|
|
|
1219 ;; Form the query string
|
|
|
1220 (while vals
|
|
|
1221
|
|
|
1222 (if (not (zerop (length (car vals))))
|
|
|
1223 (setq query (concat query " " (car fields) "=" (car vals))))
|
|
|
1224
|
|
|
1225 (setq vals (cdr vals))
|
|
|
1226 (setq fields (cdr fields)))
|
|
|
1227
|
|
|
1228 ;; Use this string as the object selector.
|
|
|
1229 (gopher-set-object-selector gopher-obj query)
|
|
|
1230
|
|
|
1231 ;; Retrieve the data from the server. Unlike gopher, the CSO data
|
|
|
1232 ;; does not use `.' as a terminator.
|
|
|
1233 (gopher-document-object gopher-obj (current-buffer) "^[2-9]")
|
|
|
1234
|
|
|
1235 ;; Strip CSO control information from the buffer.
|
|
|
1236 (gopher-clean-cso-buffer obj)))
|
|
|
1237
|
|
|
1238
|
|
|
1239 (defun gopher-clean-cso-buffer (obj)
|
|
|
1240 "Strip CSO control information from the current buffer."
|
|
|
1241
|
|
|
1242 (let ((req "")
|
|
|
1243 (buffer-read-only nil)
|
|
|
1244 beg nreq)
|
|
|
1245 (goto-char (point-min))
|
|
|
1246 (insert "\n")
|
|
|
1247 (while (not (eobp))
|
|
|
1248 (cond ((and (>= (following-char) ?3) (<= (following-char) ?9))
|
|
|
1249 (delete-char 4)
|
|
|
1250 (insert (concat (gopher-object-selector obj) "\n")))
|
|
|
1251
|
|
|
1252 ((eq (following-char) ?-)
|
|
|
1253 (delete-char 5)
|
|
|
1254 (setq beg (point))
|
|
|
1255 (skip-chars-forward "^:")
|
|
|
1256 (setq nreq (buffer-substring beg (point)))
|
|
|
1257 (goto-char beg)
|
|
|
1258 (or (string= req nreq)
|
|
|
1259 (insert (concat "--------------------------"
|
|
|
1260 "-----------------------------\n")))
|
|
|
1261 (setq req nreq)
|
|
|
1262 (setq beg (point))
|
|
|
1263 (skip-chars-forward "^:")
|
|
|
1264 (forward-char)
|
|
|
1265 (delete-region beg (point)))
|
|
|
1266
|
|
|
1267 (t
|
|
|
1268 (setq beg (point))
|
|
|
1269 (forward-line 1)
|
|
|
1270 (delete-region beg (point))
|
|
|
1271 (forward-line -1))
|
|
|
1272 )
|
|
|
1273 (forward-line 1))
|
|
|
1274
|
|
|
1275 (goto-char (point-min))
|
|
|
1276 (delete-char 1)))
|
|
|
1277
|
|
|
1278
|
|
|
1279 ;;;;--------------------------------------------------------------------------
|
|
|
1280 ;;;; indices.
|
|
|
1281 ;;;;
|
|
|
1282 ;;;; To query an index, the search string is appended to the selector.
|
|
|
1283 ;;;; The index returns a gopher directory.
|
|
|
1284 ;;;;
|
|
|
1285
|
|
|
1286
|
|
|
1287 (defun gopher-index-object (obj oldbuf)
|
|
|
1288 "Query a gopher directory object."
|
|
|
1289
|
|
|
1290 ;; Get the search string from the user.
|
|
|
1291 (let ((str (read-from-minibuffer "Key: "))
|
|
|
1292 (newobj (copy-sequence obj)))
|
|
|
1293
|
|
|
1294 ;; Append it to the selector and retrieve the modified object
|
|
|
1295 ;; like a directory.
|
|
|
1296 (setq str (gopher-trim-blanks str))
|
|
|
1297 (if (> (length str) 0)
|
|
|
1298 (progn
|
|
|
1299 (gopher-set-object-selector newobj
|
|
|
1300 (concat (gopher-object-selector obj) "\t"
|
|
|
1301 str))
|
|
|
1302 (gopher-directory-object newobj (current-buffer)))
|
|
|
1303 )))
|
|
|
1304
|
|
|
1305
|
|
|
1306
|
|
|
1307 ;;;;--------------------------------------------------------------------------
|
|
|
1308 ;;;; telneting.
|
|
|
1309 ;;;;
|
|
|
1310
|
|
|
1311 (defun gopher-telnet-object (obj oldbuf)
|
|
|
1312 "Start a telnet session to a gopher object.
|
|
30
|
1313 If gopher-telnet-command is non-nil, then that is a command to start
|
|
0
|
1314 a telnet session in a subprocess. Otherwise, the emacs-lisp telnet
|
|
|
1315 package is used."
|
|
|
1316
|
|
|
1317 ;; make the telnet argument string
|
|
|
1318 (let ((arg (gopher-object-host obj))
|
|
|
1319 (port (gopher-object-port obj)))
|
|
|
1320 (if (not (zerop port))
|
|
|
1321 (setq arg (concat arg
|
|
|
1322 (if (eq system-type 'vax-vms)
|
|
|
1323 "/port="
|
|
|
1324 " ")
|
|
|
1325 port)))
|
|
|
1326
|
|
|
1327 (if gopher-telnet-command
|
|
|
1328
|
|
|
1329 ;; start up telnet as a separate process
|
|
|
1330 (save-window-excursion
|
|
|
1331 (gopher-background
|
|
|
1332 (concat gopher-telnet-command " " arg)))
|
|
|
1333
|
|
|
1334 ;; use telnet-mode
|
|
|
1335 (telnet arg)
|
|
|
1336 ;; set things up so we can get back to the last node.
|
|
|
1337 (gopher-make-local-vars
|
|
|
1338 'gopher-obj obj
|
|
|
1339 'gopher-last oldbuf
|
|
|
1340 'gopher-telnet-process-name (concat arg "-telnet"))
|
|
|
1341 (local-set-key "\C-cl" 'gopher-telnet-quit)
|
|
|
1342 (local-set-key "\C-xk" 'gopher-telnet-quit)
|
|
|
1343 )
|
|
|
1344
|
|
|
1345 ;; show the login info to the user
|
|
|
1346 (if (not (zerop (length (gopher-object-selector obj))))
|
|
|
1347 (progn
|
|
|
1348 (beep)
|
|
|
1349 (message (concat
|
|
|
1350 "Login as: "
|
|
|
1351 (gopher-object-selector obj)
|
|
|
1352 ))
|
|
|
1353 ))
|
|
|
1354 ))
|
|
|
1355
|
|
|
1356
|
|
|
1357 (defun gopher-telnet-quit nil
|
|
|
1358 "Clean up a telnet session and return to the previous gopher node."
|
|
|
1359 (interactive)
|
|
|
1360 (condition-case nil
|
|
|
1361 (delete-process gopher-telnet-process-name)
|
|
|
1362 (error t))
|
|
|
1363 (gopher-last-node))
|
|
|
1364
|
|
|
1365
|
|
|
1366
|
|
|
1367 ;;;;--------------------------------------------------------------------------
|
|
|
1368 ;;;; Images/sounds.
|
|
|
1369 ;;;;
|
|
|
1370
|
|
|
1371 (defun gopher-image-object (obj oldbuf)
|
|
|
1372 "Retrieve what we hope is an image and show it."
|
|
|
1373 (let (
|
|
|
1374 (showit (y-or-n-p "Display this item? "))
|
|
|
1375 (fname)
|
|
|
1376 (buf (gopher-get-doc-buf (gopher-object-descr obj))))
|
|
|
1377 (if showit
|
|
|
1378 (setq fname (make-temp-name "/tmp/gopherimg"))
|
|
|
1379 (setq fname(read-file-name "File to save in: ")))
|
|
|
1380 (gopher-retrieve-document-cleanly (buf
|
|
|
1381 (gopher-object-selector obj)
|
|
|
1382 (gopher-object-host obj)
|
|
|
1383 (gopher-object-port obj)
|
|
|
1384 'none)
|
|
|
1385 (progn
|
|
|
1386 (error "Problems retrieving object.")
|
|
|
1387 (kill-buffer buf))
|
|
|
1388
|
|
|
1389 (save-excursion
|
|
|
1390 (set-buffer buf)
|
|
|
1391 (write-file fname))
|
|
|
1392 (kill-buffer buf)
|
|
|
1393 (if (and showit gopher-image-display-command)
|
|
|
1394
|
|
|
1395 ;; Spawn a process to display the image.
|
|
|
1396 ;; But modify its sentinel so that the file we wrote
|
|
|
1397 ;; will get deleted when the process exits.
|
|
|
1398 (save-window-excursion
|
|
|
1399 (let ((p (gopher-background
|
|
|
1400 (concat gopher-image-display-command " " fname))))
|
|
|
1401 (set-process-sentinel p
|
|
|
1402 (` (lambda (process msg)
|
|
|
1403 ((, (process-sentinel p)) process msg)
|
|
|
1404 (if (not (eq (process-status process) 'run))
|
|
|
1405 (delete-file (, fname)))
|
|
|
1406 )))
|
|
|
1407 ))
|
|
|
1408 ))))
|
|
|
1409
|
|
|
1410
|
|
|
1411
|
|
|
1412 ;;;;--------------------------------------------------------------------------
|
|
|
1413 ;;;; Various opaque objects. Just save them in a file for now.
|
|
|
1414 ;;;;
|
|
|
1415
|
|
|
1416 (defun gopher-binary-object (obj oldbuf)
|
|
|
1417 "Retrieve a gopher object and save it to a file,
|
|
|
1418 without trying to interpret it in any way."
|
|
|
1419 (let ((fname (read-file-name "File to save in: "))
|
|
|
1420 (buf (gopher-get-doc-buf (gopher-object-descr obj))))
|
|
|
1421
|
|
|
1422 (gopher-retrieve-document-cleanly (buf
|
|
|
1423 (gopher-object-selector obj)
|
|
|
1424 (gopher-object-host obj)
|
|
|
1425 (gopher-object-port obj)
|
|
|
1426 'none)
|
|
|
1427
|
|
|
1428 (progn
|
|
|
1429 (error "Problems retrieving object.")
|
|
|
1430 (kill-buffer buf))
|
|
|
1431
|
|
|
1432 (save-excursion
|
|
|
1433 (set-buffer buf)
|
|
|
1434 (write-file fname))
|
|
|
1435 (kill-buffer buf)
|
|
|
1436 )))
|
|
|
1437
|
|
|
1438
|
|
|
1439 ;;;;--------------------------------------------------------------------------
|
|
|
1440 ;;;; forms stuff
|
|
|
1441 ;;;;
|
|
|
1442 ;;;; Uses some of the internal routines from forms.el to present
|
|
|
1443 ;;;; a form which is not associated with a file.
|
|
|
1444 ;;;;
|
|
|
1445
|
|
|
1446 (defun gopher-form (form-name accept-action number-of-fields format-list)
|
|
|
1447 "Display a buffer containing a form for the user to enter data.
|
|
|
1448 The form is described by NUMBER-OF-FIELDS and FORMAT-LIST (cf. forms-mode).
|
|
|
1449 FORM-NAME is a string to put in the modeline.
|
|
|
1450 When the user accepts the data in the form by pressing `C-c RET', the
|
|
|
1451 function ACCEPT-ACTION is called with a list of the strings which
|
|
|
1452 the user entered."
|
|
|
1453
|
|
|
1454 (switch-to-buffer (generate-new-buffer "*gopher form*"))
|
|
|
1455
|
|
|
1456 (gopher-make-local-vars
|
|
|
1457 'forms-format-list format-list
|
|
|
1458 'forms-number-of-fields number-of-fields
|
|
|
1459 'forms-field-sep "\t"
|
|
|
1460 'forms-read-only nil
|
|
|
1461 'forms-multi-line nil
|
|
|
1462 'forms--number-of-markers nil
|
|
|
1463 'forms--markers nil
|
|
|
1464 'forms--format nil
|
|
|
1465 'forms--parser nil
|
|
|
1466 'forms--dynamic-text nil
|
|
|
1467 'forms-fields nil
|
|
|
1468 'forms-the-record-list nil
|
|
|
1469 'forms-accept-action accept-action
|
|
|
1470 )
|
|
|
1471
|
|
|
1472 (forms--process-format-list)
|
|
|
1473 (forms--make-format)
|
|
|
1474 (forms--make-parser)
|
|
|
1475
|
|
|
1476 (erase-buffer)
|
|
|
1477
|
|
|
1478 ;; make local variables
|
|
|
1479 (make-local-variable 'forms--file-buffer)
|
|
|
1480 (make-local-variable 'forms--total-records)
|
|
|
1481 (make-local-variable 'forms--current-record)
|
|
|
1482 (make-local-variable 'forms--the-record-list)
|
|
|
1483 (make-local-variable 'forms--search-rexexp)
|
|
|
1484
|
|
|
1485 ;; set the major mode indicator
|
|
|
1486 (setq major-mode 'gopher-form-mode)
|
|
|
1487 (setq mode-name "gopher form")
|
|
|
1488
|
|
|
1489 (set-buffer-modified-p nil)
|
|
|
1490
|
|
|
1491 (use-local-map gopher-form-mode-map)
|
|
|
1492
|
|
|
1493 (forms--show-record (make-string (1- number-of-fields) ?\t))
|
|
|
1494
|
|
|
1495 (run-hooks 'gopher-form-mode-hooks))
|
|
|
1496
|
|
|
1497
|
|
|
1498 (defun gopher-form-accept nil
|
|
|
1499 (interactive)
|
|
|
1500
|
|
|
1501 (funcall forms-accept-action (forms--parse-form)))
|
|
|
1502
|
|
|
1503 (define-key gopher-form-mode-map "\C-c\r" 'gopher-form-accept)
|
|
|
1504 (define-key gopher-form-mode-map "\C-cl" 'gopher-last-node)
|
|
|
1505
|
|
|
1506
|
|
|
1507 ;;;;--------------------------------------------------------------------------
|
|
|
1508 ;;;; low-level communications routines
|
|
|
1509 ;;;;
|
|
|
1510
|
|
|
1511
|
|
|
1512 (defun gopher-retrieve-document (buf sel host port &optional end-regexp)
|
|
|
1513 "Retrieve a gopher object into BUF.
|
|
|
1514 The object is identified by a SEL HOST PORT triple.
|
|
|
1515 Optional argument END-REGEXP is used for data which is not `.'-terminated.
|
|
|
1516 If END-REGEXP is non-nil and not a string, then it is assumed that
|
|
|
1517 the data is binary, and reading will continue until the sender disconnects.
|
|
|
1518 Returns NIL if an error occured during the attempt to retrieve the
|
|
|
1519 document, otherwise T.
|
|
|
1520 "
|
|
|
1521
|
|
|
1522 ;; Default is single period termination.
|
|
|
1523 (or end-regexp (setq end-regexp "^\\.\r$"))
|
|
|
1524
|
|
|
1525 (save-excursion
|
|
|
1526 (set-buffer buf)
|
|
|
1527 (erase-buffer)
|
|
|
1528
|
|
|
1529 (let ((h (assoc host gopher-hostname-aliases)))
|
|
|
1530 (if h (setq host (cdr h))))
|
|
|
1531
|
|
|
1532 ;; Open the connection to the server.
|
|
|
1533 ;; If we get an unknown service error, try looking the port up in
|
|
|
1534 ;; gopher-port-aliases. If we find it there, try the connect again
|
|
|
1535 ;; with that translation.
|
|
|
1536 (let (wait
|
|
|
1537 (gopher-server-process
|
|
|
1538 (let (p (try-again t))
|
|
|
1539 (while try-again
|
|
|
1540 (setq try-again nil)
|
|
|
1541 (condition-case errinfo
|
|
|
1542 (setq p (open-network-stream "gopher" (current-buffer)
|
|
|
1543 host port))
|
|
|
1544 (error (if (and (string-match "^Unknown service .*$"
|
|
|
1545 (nth 1 errinfo))
|
|
|
1546 (setq port (cdr (assoc port
|
|
|
1547 gopher-port-aliases))))
|
|
|
1548 (setq try-again t)
|
|
|
1549 (ding)
|
|
|
1550 (message (format "%s: %s"
|
|
|
1551 (nth 0 errinfo)
|
|
|
1552 (nth 1 errinfo)))
|
|
|
1553 ))))
|
|
|
1554 p)))
|
|
|
1555
|
|
|
1556 (cond (gopher-server-process
|
|
|
1557
|
|
|
1558 ;; keep the emacs end-of-process status line out of the buffer
|
|
|
1559 (set-process-sentinel gopher-server-process 'gopher-sentinel)
|
|
|
1560
|
|
|
1561 ;; send the selector to the server
|
|
|
1562 (process-send-string gopher-server-process (concat sel "\r\n"))
|
|
|
1563
|
|
|
1564 ;; receive the response from the server
|
|
|
1565 ;; based on nntp.el from GNUS
|
|
|
1566 (setq wait t)
|
|
|
1567 (while wait
|
|
|
1568 (if (stringp end-regexp)
|
|
|
1569 (progn
|
|
|
1570 (goto-char (point-max))
|
|
|
1571 (forward-line -1)))
|
|
|
1572 (if (and (stringp end-regexp)
|
|
|
1573 (looking-at end-regexp))
|
|
|
1574 (setq wait nil)
|
|
|
1575 (if (not (memq (process-status gopher-server-process)
|
|
|
1576 '(open run)))
|
|
|
1577 (progn
|
|
|
1578 (message "gopher: connection closed")
|
|
|
1579 (setq wait nil))
|
|
|
1580 (if gopher-debug-read
|
|
|
1581 (message "gopher: Reading..."))
|
|
|
1582 (cond (gopher-buggy-accept
|
|
|
1583 (sit-for 1))
|
|
|
1584 ((and (boundp 'epoch::version) epoch::version)
|
|
|
1585 (accept-process-output gopher-server-process 2))
|
|
|
1586 (t
|
|
|
1587 (accept-process-output gopher-server-process))
|
|
|
1588 )
|
|
|
1589 (if gopher-debug-read
|
|
|
1590 (message " ")))
|
|
|
1591 ))
|
|
|
1592
|
|
|
1593 ;; be sure the net connection has gone away...
|
|
|
1594 (condition-case nil
|
|
|
1595 (delete-process gopher-server-process)
|
|
|
1596 (error t))
|
|
|
1597
|
|
|
1598 ;; clean up the text buffer
|
|
|
1599 (if (stringp end-regexp)
|
|
|
1600 (gopher-clean-text))
|
|
|
1601
|
|
|
1602 t)
|
|
|
1603
|
|
|
1604 (t nil))
|
|
|
1605 )))
|
|
|
1606
|
|
|
1607
|
|
|
1608 ;;; adapted from GNUS
|
|
|
1609 (defun gopher-clean-text ()
|
|
|
1610 "Decode text transmitted by gopher.
|
|
|
1611 0. Delete status line.
|
|
|
1612 1. Delete `^M' at end of line.
|
|
|
1613 2. Delete `.' at end of buffer (end of text mark).
|
|
|
1614 3. Delete `.' at beginning of line. (does gopher want this?)"
|
|
|
1615
|
|
|
1616 ;; Insert newline at end of buffer.
|
|
|
1617 (goto-char (point-max))
|
|
|
1618 (if (not (bolp))
|
|
|
1619 (insert "\n"))
|
|
|
1620 ;; Delete `^M' at end of line.
|
|
|
1621 (goto-char (point-min))
|
|
|
1622 (while (re-search-forward "\r[^\n]*$" nil t)
|
|
|
1623 (replace-match ""))
|
|
|
1624 ; (goto-char (point-min))
|
|
|
1625 ; (while (not (eobp))
|
|
|
1626 ; (end-of-line)
|
|
|
1627 ; (if (= (preceding-char) ?\r)
|
|
|
1628 ; (delete-char -1))
|
|
|
1629 ; (forward-line 1)
|
|
|
1630 ; )
|
|
|
1631 ;; Delete `.' at end of buffer (end of text mark).
|
|
|
1632 (goto-char (point-max))
|
|
|
1633 (forward-line -1) ;(beginning-of-line)
|
|
|
1634 (while (looking-at "^\\.$")
|
|
|
1635 (delete-region (point) (progn (forward-line 1) (point)))
|
|
|
1636 (forward-line -1))
|
|
|
1637 ;; Replace `..' at beginning of line with `.'.
|
|
|
1638 (goto-char (point-min))
|
|
|
1639 ;; (replace-regexp "^\\.\\." ".")
|
|
|
1640 (while (search-forward "\n.." nil t)
|
|
|
1641 (delete-char -1))
|
|
|
1642 )
|
|
|
1643
|
|
|
1644
|
|
|
1645 (defun gopher-sentinel (proc status)
|
|
|
1646 nil)
|
|
|
1647
|
|
|
1648 (provide 'gopher)
|
|
|
1649
|
|
|
1650 ;;; gopher.el ends here
|
|
|
1651
|
|
|
1652 ;;;(gopher.el) Local Variables:
|
|
|
1653 ;;;(gopher.el) eval: (put 'gopher-retrieve-document-cleanly 'lisp-indent-hook 2)
|
|
|
1654 ;;;(gopher.el) End:
|
|
|
1655
|
