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397 lines
17 KiB
EmacsLisp
397 lines
17 KiB
EmacsLisp
;;; webjump.el --- programmable Web hotlist
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;; Copyright (C) 1996 Free Software Foundation
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;; Author: Neil W. Van Dyke <nwv@acm.org>
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;; Created: Fri 09 Aug 1996
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;; Keywords: comm www
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;; X-URL: http://www.cs.brown.edu/people/nwv/
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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;; Boston, MA 02111-1307, USA.
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;;; Commentary:
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;; WebJump provides a sort of ``programmable hotlist'' of Web sites that can
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;; quickly be invoked in your Web browser. Each Web site in the hotlist has a
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;; name, and you select the desired site name via a completing string prompt in
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;; the minibuffer. The URL for each Web site is defined as a static string or
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;; a built-in or custom function, allowing interactive prompting for
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;; site-specific queries and options.
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;; Note that WebJump was originally intended to complement your conventional
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;; browser-based hotlist, not replace it. (Though there's no reason you
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;; couldn't use WebJump for your entire hotlist if you were so inclined.)
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;; The `webjump-sites' variable, which defines the hotlist, defaults to some
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;; example sites. You'll probably want to override it with your own favorite
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;; sites. The documentation for the variable describes the syntax.
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;; You may wish to add something like the following to your `.emacs' file:
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;;
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;; (load "webjump")
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;; (global-set-key "\C-cj" 'webjump)
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;; (setq webjump-sites
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;; (append '(
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;; ("My Home Page" . "www.someisp.net/users/joebobjr/")
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;; ("Pop's Site" . "www.joebob-and-son.com/")
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;; )
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;; webjump-sample-sites))
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;;
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;; The above loads this package, binds `C-c j' to invoke WebJump, and adds
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;; your personal favorite sites to the hotlist.
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;; The `webjump-sample-sites' constant mostly contains sites that are expected
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;; to be generally useful to Emacs users or that have some sort of query which
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;; can be coded in WebJump. There are two main goals of this sample site list:
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;; (1) demonstrate WebJump capabilities and usage; (2) provide definitions for
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;; many popular sites so that people don't have to reinvent the wheel. A few
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;; assorted other sites have been thrown in on a whim. No commercial sites are
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;; included unless they provide a free, generally-useful service. Inclusion of
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;; a site does not represent an endorsement. Please contact the maintainer
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;; with change requests.
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;; The `browse-url' package is used to submit URLs to the browser, so any
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;; browser-specific configuration should be done there.
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;; WebJump inherits a small amount code from my `altavista.el' package, and is
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;; intended to obsolete that package.
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;;; Code:
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;;-------------------------------------------------------- Package Dependencies
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(require 'browse-url)
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;;------------------------------------------------------------------- Constants
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(defvar webjump-sample-sites
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'(("AltaVista" .
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[simple-query
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"www.altavista.digital.com"
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"www.altavista.digital.com/cgi-bin/query?pg=aq&what=web&fmt=.&q="
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"&r=&d0=&d1="])
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("Archie" .
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[simple-query "http://hoohoo.ncsa.uiuc.edu/cgi-bin/AA.pl"
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"http://hoohoo.ncsa.uiuc.edu/cgi-bin/AA.pl?query=" ""])
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("Bastard Operator from Hell" . "www.replay.com/bofh/")
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("Computer Professionals for Social Responsibility" . "www.cpsr.org/dox/")
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("Electronic Frontier Foundation" . "www.eff.org")
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("Emacs Lisp Archive" .
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"ftp://archive.cis.ohio-state.edu/pub/gnu/emacs/elisp-archive/")
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("GNU Project" . "www.gnu.ai.mit.edu")
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("GNU FTP Archive". [mirrors
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"ftp://prep.ai.mit.edu/pub/gnu/"
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;; ASIA:
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"ftp://ftp.cs.titech.ac.jp"
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"ftp://tron.um.u-tokyo.ac.jp/pub/GNU/prep"
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"ftp://cair-archive.kaist.ac.kr/pub/gnu"
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"ftp://ftp.nectec.or.th/pub/mirrors/gnu"
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;; AUSTRALIA:
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"ftp://archie.au/gnu"
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"ftp://archie.oz/gnu"
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"ftp://archie.oz.au/gnu"
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;; AFRICA:
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"ftp://ftp.sun.ac.za/pub/gnu"
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;; MIDDLE-EAST:
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"ftp://ftp.technion.ac.il/pub/unsupported/gnu"
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;; EUROPE:
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"ftp://irisa.irisa.fr/pub/gnu"
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"ftp://ftp.univ-lyon1.fr/pub/gnu"
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"ftp://ftp.mcc.ac.uk"
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"ftp://unix.hensa.ac.uk/mirrors/uunet/systems/gnu"
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"ftp://src.doc.ic.ac.uk/gnu"
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"ftp://ftp.ieunet.ie/pub/gnu"
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"ftp://ftp.eunet.ch"
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"ftp://nic.switch.ch/mirror/gnu"
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"ftp://ftp.informatik.rwth-aachen.de/pub/gnu"
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"ftp://ftp.informatik.tu-muenchen.de"
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"ftp://ftp.win.tue.nl/pub/gnu"
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"ftp://ftp.nl.net"
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"ftp://ftp.etsimo.uniovi.es/pub/gnu"
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"ftp://ftp.funet.fi/pub/gnu"
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"ftp://ftp.denet.dk"
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"ftp://ftp.stacken.kth.se"
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"ftp://isy.liu.se"
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"ftp://ftp.luth.se/pub/unix/gnu"
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"ftp://ftp.sunet.se/pub/gnu"
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"ftp://archive.eu.net"
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;; SOUTH AMERICA:
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"ftp://ftp.inf.utfsm.cl/pub/gnu"
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"ftp://ftp.unicamp.br/pub/gnu"
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;; WESTERN CANADA:
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"ftp://ftp.cs.ubc.ca/mirror2/gnu"
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;; USA:
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"ftp://wuarchive.wustl.edu/systems/gnu"
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"ftp://labrea.stanford.edu"
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"ftp://ftp.digex.net/pub/gnu"
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"ftp://ftp.kpc.com/pub/mirror/gnu"
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"ftp://f.ms.uky.edu/pub3/gnu"
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"ftp://jaguar.utah.edu/gnustuff"
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"ftp://ftp.hawaii.edu/mirrors/gnu"
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"ftp://uiarchive.cso.uiuc.edu/pub/gnu"
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"ftp://ftp.cs.columbia.edu/archives/gnu/prep"
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"ftp://gatekeeper.dec.com/pub/GNU"
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"ftp://ftp.uu.net/systems/gnu"
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])
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("Interactive Weather Information Network" . webjump-to-iwin)
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("Lycos" .
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[simple-query "www.lycos.com" "www.lycos.com/cgi-bin/pursuit?query=" ""])
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("Usenet FAQs" .
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[simple-query "www.cis.ohio-state.edu/hypertext/faq/usenet/FAQ-List.html"
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"www.cis.ohio-state.edu/htbin/search-usenet-faqs/form?find="
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""])
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("Risks Digest" . webjump-to-risks)
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("RTFM Usenet FAQs by Group" .
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"ftp://rtfm.mit.edu/pub/usenet-by-group/")
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("RTFM Usenet FAQs by Hierachy" .
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"ftp://rtfm.mit.edu/pub/usenet-by-hierarchy/")
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("X Consortium Archive". "ftp.x.org")
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("Yahoo" .
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[simple-query "www.yahoo.com" "search.yahoo.com/bin/search?p=" ""])
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("Yahoo Reference" "www.yahoo.com/Reference/")
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)
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"Sample hotlist for WebJump.")
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(defvar webjump-state-to-postal-alist
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'(("Alabama" . "al") ("Alaska" . "ak") ("Arizona" . "az") ("Arkansas" . "ar")
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("California" . "ca") ("Colorado" . "co") ("Connecticut" . "ct")
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("Delaware" . "de") ("Florida" . "fl") ("Georgia" . "ga") ("Hawaii" . "hi")
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("Idaho" . "id") ("Illinois" . "il") ("Indiana" . "in") ("Iowa" . "ia")
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("Kansas" . "ks") ("Kentucky" . "ky") ("Louisiana" . "la") ("Maine" . "me")
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("Maryland" . "md") ("Massachusetts" . "ma") ("Michigan" . "mi")
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("Minnesota" . "mn") ("Mississippi" . "ms") ("Missouri" . "mo")
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("Montana" . "mt") ("Nebraska" . "ne") ("Nevada" . "nv")
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("New Hampshire" . "nh") ("New Jersey" . "nj") ("New Mexico" . "nm")
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("New York" . "ny") ("North Carolina" . "nc") ("North Dakota" . "nd")
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("Ohio" . "oh") ("Oklahoma" . "ok") ("Oregon" . "or")
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("Pennsylvania" . "pa") ("Rhode Island" . "ri") ("South Carolina" . "sc")
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("South Dakota" . "sd") ("Tennessee" . "tn") ("Texas" . "tx")
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("Utah" . "ut") ("Vermont" . "vt") ("Virginia" . "va")
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("Washington" . "wa") ("West Virginia" . "wv") ("Wisconsin" . "wi")
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("Wyoming" . "wy")))
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;;------------------------------------------------------------ Option Variables
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(defvar webjump-sites
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webjump-sample-sites
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"*Hotlist for WebJump.
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The hotlist is represented as an association list, with the CAR of each cell
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being the name of the Web site, and the CDR being the definition for the URL of
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that site. The URL definition can be a string (the URL), a vector (specifying
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a special \"builtin\" which returns a URL), a symbol (name of a function which
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returns a URL), or a list (which when `eval'ed yields a URL).
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If the URL definition is a vector, then a \"builtin\" is used. A builtin has a
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Lisp-like syntax, with the name as the first element of the vector, and any
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arguments as the following elements. The three current builtins are `name',
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which returns the name of the site as the URL, `simple-query', which
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returns a URL that is a function of a query entered by the user, and `mirrors',
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which allows the user to select from among multiple mirror sites for the same
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content.
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The first argument to the `simple-query' builtin is a static URL to use if the
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user enters a blank query. The second and third arguments are the prefix and
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suffix, respectively, to add to the encoded query the user enters. This
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builtin covers Web sites that have single-string searches with the query
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embedded in the URL.
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The arguments to the `mirrors' builtin are URLs of mirror sites.
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If the symbol of a function is given, then the function will be called with the
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Web site name (the one you specified in the CAR of the alist cell) as a
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parameter. This might come in handy for various kludges.
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For convenience, if the `http://', `ftp://', or `file://' prefix is missing
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from a URL, WebJump will make a guess at what you wanted and prepend it before
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submitting the URL.")
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;;------------------------------------------------------- Sample Site Functions
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(defun webjump-to-iwin (name)
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(let ((prefix "http://iwin.nws.noaa.gov/")
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(state (webjump-read-choice name "state"
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(append '(("Puerto Rico" . "pr"))
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webjump-state-to-postal-alist))))
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(if state
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(concat prefix "iwin/" state "/"
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(webjump-read-choice name "option"
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'(("Hourly Report" . "hourly")
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("State Forecast" . "state")
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("Local Forecast" . "local")
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("Zone Forecast" . "zone")
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("Short-Term Forecast" . "shortterm")
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("Weather Summary" . "summary")
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("Public Information" . "public")
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("Climatic Data" . "climate")
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("Aviation Products" . "aviation")
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("Hydro Products" . "hydro")
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("Special Weather" . "special")
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("Watches and Warnings" . "warnings"))
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"zone")
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".html")
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prefix)))
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(defun webjump-to-risks (name)
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(let (issue volume)
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(if (and (setq volume (webjump-read-number (concat name " volume")))
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(setq issue (webjump-read-number (concat name " issue"))))
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(format "catless.ncl.ac.uk/Risks/%d.%02d.html" volume issue)
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"catless.ncl.ac.uk/Risks/")))
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;;-------------------------------------------------------------- Core Functions
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;;;###autoload
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(defun webjump ()
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"Jumps to a Web site from a programmable hotlist.
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See the documentation for the `webjump-sites' variable for how to customize the
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hotlist.
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Feedback on WebJump can be sent to the author, Neil W. Van Dyke <nwv@acm.org>,
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or submitted via `\\[webjump-submit-bug-report]'. The latest version can be
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gotten from `http://www.cs.brown.edu/people/nwv/'."
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(interactive)
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(let* ((completion-ignore-case t)
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(item (assoc (completing-read "WebJump to site: " webjump-sites nil t)
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webjump-sites))
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(name (car item))
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(expr (cdr item)))
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(funcall browse-url-browser-function
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(webjump-url-fix
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(cond ((not expr) "")
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((stringp expr) expr)
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((vectorp expr) (webjump-builtin expr name))
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((listp expr) (eval expr))
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((symbolp expr)
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(if (fboundp expr)
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(funcall expr name)
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(error "WebJump URL function \"%s\" undefined." expr)))
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(t (error "WebJump URL expression for \"%s\" invalid."
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name)))))))
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(defun webjump-builtin (expr name)
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(if (< (length expr) 1)
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(error "WebJump URL builtin for \"%s\" empty." name))
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(let ((builtin (aref expr 0)))
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(cond
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((eq builtin 'mirrors)
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(if (= (length expr) 1)
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(error
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"WebJump URL builtin \"mirrors\" for \"%s\" needs at least 1 arg."))
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(webjump-choose-mirror name (cdr (append expr nil))))
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((eq builtin 'name)
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name)
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((eq builtin 'simple-query)
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(webjump-builtin-check-args expr name 3)
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(webjump-do-simple-query name (aref expr 1) (aref expr 2) (aref expr 3)))
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(t (error "WebJump URL builtin \"%s\" for \"%s\" invalid."
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builtin name)))))
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(defun webjump-builtin-check-args (expr name count)
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(or (= (length expr) (1+ count))
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(error "WebJump URL builtin \"%s\" for \"%s\" needs %d args."
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(aref expr 0) name count)))
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(defun webjump-choose-mirror (name urls)
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(webjump-read-url-choice (concat name " mirror")
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urls
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(webjump-mirror-default urls)))
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(defun webjump-do-simple-query (name noquery-url query-prefix query-suffix)
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(let ((query (webjump-read-string (concat name " query"))))
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(if query
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(concat query-prefix (webjump-url-encode query) query-suffix)
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noquery-url)))
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(defun webjump-mirror-default (urls)
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;; Note: This should be modified to apply some simple kludges/heuristics to
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;; pick a site which is likely "close". As a tie-breaker among candidates
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;; judged equally desirable, randomness should be used.
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(car urls))
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(defun webjump-read-choice (name what choices &optional default)
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(let* ((completion-ignore-case t)
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(choice (completing-read (concat name " " what ": ") choices nil t)))
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(if (webjump-null-or-blank-string-p choice)
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default
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(cdr (assoc choice choices)))))
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(defun webjump-read-number (prompt)
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;; Note: I should make this more robust someday.
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(let ((input (webjump-read-string prompt)))
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(if input (string-to-number input))))
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(defun webjump-read-string (prompt)
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(let ((input (read-string (concat prompt ": "))))
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(if (webjump-null-or-blank-string-p input) nil input)))
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(defun webjump-read-url-choice (what urls &optional default)
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;; Note: Convert this to use `webjump-read-choice' someday.
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(let* ((completions (mapcar (function (lambda (n) (cons n n)))
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urls))
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(input (completing-read (concat what
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;;(if default " (RET for default)" "")
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": ")
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completions
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nil
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t)))
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(if (webjump-null-or-blank-string-p input)
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default
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(car (assoc input completions)))))
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(defun webjump-null-or-blank-string-p (str)
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(or (null str) (string-match "^[ \t]*$" str)))
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(defun webjump-url-encode (str)
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(mapconcat '(lambda (c)
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(cond ((= c 32) "+")
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((or (and (>= c ?a) (<= c ?z))
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(and (>= c ?A) (<= c ?Z))
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(and (>= c ?0) (<= c ?9)))
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(char-to-string c))
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(t (upcase (format "%%%02x" c)))))
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str
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""))
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(defun webjump-url-fix (url)
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(if (webjump-null-or-blank-string-p url)
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""
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(webjump-url-fix-trailing-slash
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(cond
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((string-match "^[a-zA-Z]+:" url) url)
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((string-match "^/" url) (concat "file://" url))
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((string-match "^\\([^\\./]+\\)" url)
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(concat (if (string= (downcase (match-string 1 url)) "ftp")
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"ftp"
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"http")
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"://"
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url))
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(t url)))))
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(defun webjump-url-fix-trailing-slash (url)
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(if (string-match "^[a-zA-Z]+://[^/]+$" url)
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(concat url "/")
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url))
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;;-----------------------------------------------------------------------------
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(provide 'webjump)
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;; webjump.el ends here
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