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1 ;;; webjump.el --- programmable Web hotlist
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2
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155
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3 ;; Copyright (C) 1996-1997 Free Software Foundation
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4
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5 ;; Author: Neil W. Van Dyke <nwv@acm.org>
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6 ;; Created: 09-Aug-1996
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7 ;; Keywords: comm www
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8 ;; X-URL: http://www.cs.brown.edu/people/nwv/
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9
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10 ;; This file is part of GNU Emacs.
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11
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12 ;; GNU Emacs is free software; you can redistribute it and/or modify
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13 ;; it under the terms of the GNU General Public License as published by
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14 ;; the Free Software Foundation; either version 2, or (at your option)
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15 ;; any later version.
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16
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17 ;; GNU Emacs is distributed in the hope that it will be useful,
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18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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20 ;; GNU General Public License for more details.
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21
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22 ;; You should have received a copy of the GNU General Public License
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23 ;; along with GNU Emacs; see the file COPYING. If not, write to the
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24 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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25 ;; Boston, MA 02111-1307, USA.
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26
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27 ;;; Change Log:
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28
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29 ;; [Version 1.5, 02-Jun-1997, nwv@acm.org] Prepared for first inclusion in GNU
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30 ;; Emacs distribution by merging in RMS' minor changes and moving some sample
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31 ;; Web site entries out. Also updated Lycos and Yahoo sample entries.
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32
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33 ;; [Version 1.4, 17-Sep-1996, nwv@acm.org] Removed the evil "defconst-TEST"
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34 ;; that slipped into 1.3. Organized webjump-sample-sites and modified the
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35 ;; content a bit.
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36
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37 ;; [Version 1.3, 30-Aug-1996, nwv@acm.org] Fixed broken `if' function in
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38 ;; `webjump-to-javaapi' (bugfix already posted). Added `webjump-to-iwin'.
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39 ;; Added comment on purpose of `webjump-sample-sites'. Added
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40 ;; `webjump-read-choice'.
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41
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42 ;; [Version 1.2, 16-Aug-1996, nwv@acm.org] Oops, got Gamelan mixed up with
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43 ;; Digital Espresso somehow. Added `mirrors' builtin and used it for the
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44 ;; sample GNU Archive site. Added some other sample sites. Split sample sites
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45 ;; out into separate constant. Misc. small changes. Copyright has been
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46 ;; transferred to the FSF.
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47
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48 ;; [Version 1.1, 10-Aug-1996, nwv@acm.org] Added missing call to
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49 ;; `webjump-url-fix' (thanks to Istvan Marko <mi@bgytf.hu> for pointing this
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50 ;; out). Added ``builtins'' concept in order to support `simple-query' builtin
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51 ;; for covering the majority of cases. Added a couple more sample sites.
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52
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53 ;; [Version 1.0, 09-Aug-1996, nwv@acm.org] Wrote initial version and posted to
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54 ;; gnu.emacs.sources.
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55
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56 ;;; Commentary:
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57
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58 ;; WebJump provides a sort of ``programmable hotlist'' of Web sites that can
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59 ;; quickly be invoked in your Web browser. Each Web site in the hotlist has a
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60 ;; name, and you select the desired site name via a completing string prompt in
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61 ;; the minibuffer. The URL for each Web site is defined as a static string or
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62 ;; a built-in or custom function, allowing interactive prompting for
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63 ;; site-specific queries and options.
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64
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65 ;; Note that WebJump was originally intended to complement your conventional
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66 ;; browser-based hotlist, not replace it. (Though there's no reason you
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67 ;; couldn't use WebJump for your entire hotlist if you were so inclined.)
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68
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69 ;; The `webjump-sites' variable, which defines the hotlist, defaults to some
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70 ;; example sites. You'll probably want to override it with your own favorite
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71 ;; sites. The documentation for the variable describes the syntax.
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72
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73 ;; You may wish to add something like the following to your `.emacs' file:
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74 ;;
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75 ;; (require 'webjump)
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76 ;; (global-set-key "\C-cj" 'webjump)
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77 ;; (setq webjump-sites
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78 ;; (append '(
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79 ;; ("My Home Page" . "www.someisp.net/users/joebobjr/")
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80 ;; ("Pop's Site" . "www.joebob-and-son.com/")
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81 ;; )
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82 ;; webjump-sample-sites))
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83 ;;
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84 ;; The above loads this package, binds `C-c j' to invoke WebJump, and adds your
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85 ;; personal favorite sites to the hotlist.
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86
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87 ;; The `webjump-sample-sites' variable mostly contains some site entries that
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88 ;; are expected to be generally relevant to most Emacs users. Some additional
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89 ;; site entries are defined in the separate and more frequently updated
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90 ;; `webjump-plus' package, which is available from the author's Web site.
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91
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92 ;; The `browse-url' package is used to submit URLs to the browser, so any
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93 ;; browser-specific configuration should be done there.
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94
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95 ;; WebJump inherits a small amount code from my `altavista.el' package, and is
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96 ;; intended to obsolete that package.
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97
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98 ;;; Code:
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99
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100 ;;-------------------------------------------------------- Package Dependencies
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101
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102 (require 'browse-url)
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103
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104 ;;------------------------------------------------------------------- Constants
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105
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106 (defvar webjump-version "1.5")
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107
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108 (defvar webjump-sample-sites
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109 '(
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110
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111 ;; FSF, not including Emacs-specific.
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112 ("GNU Project FTP Archive" .
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113 [mirrors "ftp://prep.ai.mit.edu/pub/gnu/"
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114 ;; ASIA:
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115 "ftp://ftp.cs.titech.ac.jp"
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116 "ftp://tron.um.u-tokyo.ac.jp/pub/GNU/prep"
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117 "ftp://cair-archive.kaist.ac.kr/pub/gnu"
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118 "ftp://ftp.nectec.or.th/pub/mirrors/gnu"
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119 ;; AUSTRALIA:
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120 "ftp://archie.au/gnu"
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121 "ftp://archie.oz/gnu"
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122 "ftp://archie.oz.au/gnu"
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123 ;; AFRICA:
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124 "ftp://ftp.sun.ac.za/pub/gnu"
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125 ;; MIDDLE-EAST:
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126 "ftp://ftp.technion.ac.il/pub/unsupported/gnu"
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127 ;; EUROPE:
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128 "ftp://irisa.irisa.fr/pub/gnu"
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129 "ftp://ftp.univ-lyon1.fr/pub/gnu"
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130 "ftp://ftp.mcc.ac.uk"
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131 "ftp://unix.hensa.ac.uk/mirrors/uunet/systems/gnu"
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132 "ftp://src.doc.ic.ac.uk/gnu"
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133 "ftp://ftp.ieunet.ie/pub/gnu"
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134 "ftp://ftp.eunet.ch"
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135 "ftp://nic.switch.ch/mirror/gnu"
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136 "ftp://ftp.informatik.rwth-aachen.de/pub/gnu"
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137 "ftp://ftp.informatik.tu-muenchen.de"
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138 "ftp://ftp.win.tue.nl/pub/gnu"
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139 "ftp://ftp.nl.net"
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140 "ftp://ftp.etsimo.uniovi.es/pub/gnu"
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141 "ftp://ftp.funet.fi/pub/gnu"
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142 "ftp://ftp.denet.dk"
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143 "ftp://ftp.stacken.kth.se"
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144 "ftp://isy.liu.se"
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145 "ftp://ftp.luth.se/pub/unix/gnu"
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146 "ftp://ftp.sunet.se/pub/gnu"
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147 "ftp://archive.eu.net"
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148 ;; SOUTH AMERICA:
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149 "ftp://ftp.inf.utfsm.cl/pub/gnu"
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150 "ftp://ftp.unicamp.br/pub/gnu"
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151 ;; WESTERN CANADA:
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152 "ftp://ftp.cs.ubc.ca/mirror2/gnu"
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153 ;; USA:
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154 "ftp://wuarchive.wustl.edu/systems/gnu"
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155 "ftp://labrea.stanford.edu"
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156 "ftp://ftp.digex.net/pub/gnu"
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157 "ftp://ftp.kpc.com/pub/mirror/gnu"
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158 "ftp://f.ms.uky.edu/pub3/gnu"
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159 "ftp://jaguar.utah.edu/gnustuff"
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160 "ftp://ftp.hawaii.edu/mirrors/gnu"
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161 "ftp://uiarchive.cso.uiuc.edu/pub/gnu"
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162 "ftp://ftp.cs.columbia.edu/archives/gnu/prep"
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163 "ftp://gatekeeper.dec.com/pub/GNU"
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164 "ftp://ftp.uu.net/systems/gnu"])
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165 ("GNU Project Home Page" . "www.fsf.org")
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166
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167 ;; Emacs.
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168 ("Eieio" . "ftp.ultranet.com/pub/zappo/")
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169 ("Emacs Lisp Archive" .
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170 "ftp://archive.cis.ohio-state.edu/pub/gnu/emacs/elisp-archive/")
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171 ("Insidious Big Brother Database" . "home.netscape.com/people/jwz/bbdb/")
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172 ("Mailcrypt" . "cag-www.lcs.mit.edu/mailcrypt/")
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173 ("WebJump" . "http://www.cs.brown.edu/people/nwv/projects/webjump/")
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174 ("XEmacs Home" . "www.xemacs.org")
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175 ("Yahoo: Emacs" .
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176 "www.yahoo.com/Computers_and_Internet/Software/Text_Editors/Emacs/")
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177
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178 ;; Internet search engines.
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179 ("AltaVista" .
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180 [simple-query
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181 "www.altavista.digital.com"
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182 "www.altavista.digital.com/cgi-bin/query?pg=aq&what=web&fmt=.&q="
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183 "&r=&d0=&d1="])
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184 ("Archie" .
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185 [simple-query "hoohoo.ncsa.uiuc.edu/cgi-bin/AA.pl"
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186 "hoohoo.ncsa.uiuc.edu/cgi-bin/AA.pl?query=" ""])
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187 ("Lycos" .
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188 [simple-query "www.lycos.com"
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189 "www.lycos.com/cgi-bin/pursuit?cat=lycos&query=" ""])
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190 ("Yahoo" .
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191 [simple-query "www.yahoo.com" "search.yahoo.com/bin/search?p=" ""])
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192
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193 ;; Misc. general interest.
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194 ("Interactive Weather Information Network" . webjump-to-iwin)
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195 ("Usenet FAQs" .
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196 [simple-query "www.cis.ohio-state.edu/hypertext/faq/usenet/FAQ-List.html"
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197 "www.cis.ohio-state.edu/htbin/search-usenet-faqs/form?find="
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198 ""])
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199 ("RTFM Usenet FAQs by Group" .
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200 "ftp://rtfm.mit.edu/pub/usenet-by-group/")
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201 ("RTFM Usenet FAQs by Hierachy" .
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202 "ftp://rtfm.mit.edu/pub/usenet-by-hierarchy/")
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203 ("Webster" .
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204 [simple-query "c.gp.cs.cmu.edu:5103/prog/webster"
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205 "gs213.sp.cs.cmu.edu/prog/webster?" ""])
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206 ("X Consortium Archive". "ftp.x.org")
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207 ("Yahoo: Reference" . "www.yahoo.com/Reference/")
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208
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209 ;; Computer social issues, privacy, professionalism.
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210 ("Association for Computing Machinery" . "www.acm.org")
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211 ("Computer Professionals for Social Responsibility" . "www.cpsr.org/dox/")
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212 ("Electronic Frontier Foundation" . "www.eff.org")
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213 ("IEEE Computer Society" . "www.computer.org")
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214 ("Pretty Good Privacy" . "web.mit.edu/network/pgp.html")
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215 ("Risks Digest" . webjump-to-risks)
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216
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217 ;; Fun.
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218 ("Bastard Operator from Hell" . "www.replay.com/bofh/")
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219
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220 )
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221 "Sample hotlist for WebJump. See the documentation for the `webjump'
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222 function and the `webjump-sites' variable.")
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223
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224 (defvar webjump-state-to-postal-alist
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225 '(("Alabama" . "al") ("Alaska" . "ak") ("Arizona" . "az") ("Arkansas" . "ar")
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226 ("California" . "ca") ("Colorado" . "co") ("Connecticut" . "ct")
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227 ("Delaware" . "de") ("Florida" . "fl") ("Georgia" . "ga") ("Hawaii" . "hi")
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228 ("Idaho" . "id") ("Illinois" . "il") ("Indiana" . "in") ("Iowa" . "ia")
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229 ("Kansas" . "ks") ("Kentucky" . "ky") ("Louisiana" . "la") ("Maine" . "me")
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230 ("Maryland" . "md") ("Massachusetts" . "ma") ("Michigan" . "mi")
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231 ("Minnesota" . "mn") ("Mississippi" . "ms") ("Missouri" . "mo")
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232 ("Montana" . "mt") ("Nebraska" . "ne") ("Nevada" . "nv")
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233 ("New Hampshire" . "nh") ("New Jersey" . "nj") ("New Mexico" . "nm")
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234 ("New York" . "ny") ("North Carolina" . "nc") ("North Dakota" . "nd")
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235 ("Ohio" . "oh") ("Oklahoma" . "ok") ("Oregon" . "or")
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236 ("Pennsylvania" . "pa") ("Rhode Island" . "ri") ("South Carolina" . "sc")
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237 ("South Dakota" . "sd") ("Tennessee" . "tn") ("Texas" . "tx")
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238 ("Utah" . "ut") ("Vermont" . "vt") ("Virginia" . "va")
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239 ("Washington" . "wa") ("West Virginia" . "wv") ("Wisconsin" . "wi")
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240 ("Wyoming" . "wy")))
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241
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242 ;;------------------------------------------------------------ Option Variables
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243
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244 (defvar webjump-sites
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245 webjump-sample-sites
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246 "*Hotlist for WebJump.
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247
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248 The hotlist is represented as an association list, with the CAR of each cell
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249 being the name of the Web site, and the CDR being the definition for the URL of
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250 that site. The URL definition can be a string (the URL), a vector (specifying
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251 a special \"builtin\" which returns a URL), a symbol (name of a function which
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252 returns a URL), or a list (which when `eval'ed yields a URL).
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253
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254 If the URL definition is a vector, then a \"builtin\" is used. A builtin has a
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255 Lisp-like syntax, with the name as the first element of the vector, and any
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256 arguments as the following elements. The three current builtins are `name',
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257 which returns the name of the site as the URL, `simple-query', which
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258 returns a URL that is a function of a query entered by the user, and `mirrors',
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259 which allows the user to select from among multiple mirror sites for the same
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260 content.
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261
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262 The first argument to the `simple-query' builtin is a static URL to use if the
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263 user enters a blank query. The second and third arguments are the prefix and
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264 suffix, respectively, to add to the encoded query the user enters. This
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265 builtin covers Web sites that have single-string searches with the query
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266 embedded in the URL.
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267
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268 The arguments to the `mirrors' builtin are URLs of mirror sites.
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269
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270 If the symbol of a function is given, then the function will be called with the
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271 Web site name (the one you specified in the CAR of the alist cell) as a
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272 parameter. This might come in handy for various kludges.
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273
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274 For convenience, if the `http://', `ftp://', or `file://' prefix is missing
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275 from a URL, WebJump will make a guess at what you wanted and prepend it before
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276 submitting the URL.")
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277
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278 ;;------------------------------------------------------- Sample Site Functions
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279
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280 (defun webjump-to-iwin (name)
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281 (let ((prefix "http://iwin.nws.noaa.gov/")
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282 (state (webjump-read-choice name "state"
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283 (append '(("Puerto Rico" . "pr"))
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284 webjump-state-to-postal-alist))))
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285 (if state
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286 (concat prefix "iwin/" state "/"
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287 (webjump-read-choice name "option"
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288 '(("Hourly Report" . "hourly")
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289 ("State Forecast" . "state")
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290 ("Local Forecast" . "local")
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291 ("Zone Forecast" . "zone")
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292 ("Short-Term Forecast" . "shortterm")
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293 ("Weather Summary" . "summary")
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294 ("Public Information" . "public")
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295 ("Climatic Data" . "climate")
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296 ("Aviation Products" . "aviation")
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297 ("Hydro Products" . "hydro")
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298 ("Special Weather" . "special")
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299 ("Watches and Warnings" . "warnings"))
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300 "zone")
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301 ".html")
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302 prefix)))
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303
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304 (defun webjump-to-risks (name)
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305 (let (issue volume)
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306 (if (and (setq volume (webjump-read-number (concat name " volume")))
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307 (setq issue (webjump-read-number (concat name " issue"))))
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308 (format "catless.ncl.ac.uk/Risks/%d.%02d.html" volume issue)
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309 "catless.ncl.ac.uk/Risks/")))
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310
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311 ;;-------------------------------------------------------------- Core Functions
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312
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313 ;;;###autoload
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314 (defun webjump ()
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315 "Jumps to a Web site from a programmable hotlist.
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316
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317 See the documentation for the `webjump-sites' variable for how to customize the
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318 hotlist.
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319
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320 Please submit bug reports and other feedback to the author, Neil W. Van Dyke
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321 <nwv@acm.org>.
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322
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323 The latest version can be gotten from `http://www.cs.brown.edu/people/nwv/'.
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324 That Web site also contains `webjump-plus.el', a larger and more frequently
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325 updated sample WebJump hotlist."
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326 (interactive)
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327 (let* ((completion-ignore-case t)
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328 (item (assoc (completing-read "WebJump to site: " webjump-sites nil t)
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329 webjump-sites))
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330 (name (car item))
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331 (expr (cdr item)))
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332 (funcall browse-url-browser-function
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333 (webjump-url-fix
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334 (cond ((not expr) "")
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335 ((stringp expr) expr)
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336 ((vectorp expr) (webjump-builtin expr name))
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337 ((listp expr) (eval expr))
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338 ((symbolp expr)
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339 (if (fboundp expr)
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340 (funcall expr name)
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341 (error "WebJump URL function \"%s\" undefined." expr)))
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342 (t (error "WebJump URL expression for \"%s\" invalid."
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343 name)))))))
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344
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345 (defun webjump-builtin (expr name)
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346 (if (< (length expr) 1)
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347 (error "WebJump URL builtin for \"%s\" empty." name))
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348 (let ((builtin (aref expr 0)))
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349 (cond
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350 ((eq builtin 'mirrors)
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351 (if (= (length expr) 1)
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352 (error
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353 "WebJump URL builtin \"mirrors\" for \"%s\" needs at least 1 arg."))
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354 (webjump-choose-mirror name (cdr (append expr nil))))
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355 ((eq builtin 'name)
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356 name)
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357 ((eq builtin 'simple-query)
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358 (webjump-builtin-check-args expr name 3)
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359 (webjump-do-simple-query name (aref expr 1) (aref expr 2) (aref expr 3)))
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360 (t (error "WebJump URL builtin \"%s\" for \"%s\" invalid."
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361 builtin name)))))
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362
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363 (defun webjump-builtin-check-args (expr name count)
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364 (or (= (length expr) (1+ count))
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365 (error "WebJump URL builtin \"%s\" for \"%s\" needs %d args."
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366 (aref expr 0) name count)))
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367
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368 (defun webjump-choose-mirror (name urls)
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369 (webjump-read-url-choice (concat name " mirror")
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370 urls
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371 (webjump-mirror-default urls)))
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372
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373 (defun webjump-do-simple-query (name noquery-url query-prefix query-suffix)
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374 (let ((query (webjump-read-string (concat name " query"))))
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375 (if query
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376 (concat query-prefix (webjump-url-encode query) query-suffix)
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377 noquery-url)))
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378
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379 (defun webjump-mirror-default (urls)
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380 ;; Note: This should be modified to apply some simple kludges/heuristics to
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381 ;; pick a site which is likely "close". As a tie-breaker among candidates
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155
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382 ;; judged equally desirable, randomness might be used.
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98
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383 (car urls))
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384
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385 (defun webjump-read-choice (name what choices &optional default)
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386 (let* ((completion-ignore-case t)
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387 (choice (completing-read (concat name " " what ": ") choices nil t)))
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388 (if (webjump-null-or-blank-string-p choice)
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389 default
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390 (cdr (assoc choice choices)))))
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391
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392 (defun webjump-read-number (prompt)
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393 ;; Note: I should make this more robust someday.
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394 (let ((input (webjump-read-string prompt)))
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395 (if input (string-to-number input))))
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396
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397 (defun webjump-read-string (prompt)
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398 (let ((input (read-string (concat prompt ": "))))
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399 (if (webjump-null-or-blank-string-p input) nil input)))
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400
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401 (defun webjump-read-url-choice (what urls &optional default)
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402 ;; Note: Convert this to use `webjump-read-choice' someday.
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403 (let* ((completions (mapcar (function (lambda (n) (cons n n)))
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404 urls))
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405 (input (completing-read (concat what
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406 ;;(if default " (RET for default)" "")
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407 ": ")
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408 completions
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409 nil
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410 t)))
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411 (if (webjump-null-or-blank-string-p input)
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412 default
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413 (car (assoc input completions)))))
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414
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415 (defun webjump-null-or-blank-string-p (str)
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416 (or (null str) (string-match "^[ \t]*$" str)))
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417
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418 (defun webjump-url-encode (str)
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419 (mapconcat '(lambda (c)
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420 (cond ((= c 32) "+")
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421 ((or (and (>= c ?a) (<= c ?z))
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422 (and (>= c ?A) (<= c ?Z))
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423 (and (>= c ?0) (<= c ?9)))
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424 (char-to-string c))
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425 (t (upcase (format "%%%02x" c)))))
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426 str
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427 ""))
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428
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429 (defun webjump-url-fix (url)
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430 (if (webjump-null-or-blank-string-p url)
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431 ""
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432 (webjump-url-fix-trailing-slash
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433 (cond
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434 ((string-match "^[a-zA-Z]+:" url) url)
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435 ((string-match "^/" url) (concat "file://" url))
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436 ((string-match "^\\([^\\./]+\\)" url)
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437 (concat (if (string= (downcase (match-string 1 url)) "ftp")
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438 "ftp"
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439 "http")
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440 "://"
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441 url))
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442 (t url)))))
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443
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444 (defun webjump-url-fix-trailing-slash (url)
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445 (if (string-match "^[a-zA-Z]+://[^/]+$" url)
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446 (concat url "/")
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447 url))
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448
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449 ;;-----------------------------------------------------------------------------
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450
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451 (provide 'webjump)
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452
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453 ;; webjump.el ends here
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