391 lines
16 KiB
EmacsLisp
391 lines
16 KiB
EmacsLisp
;;; webjump.el --- programmable Web hotlist -*- lexical-binding: t; -*-
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;; Copyright (C) 1996-1997, 2001-2024 Free Software Foundation, Inc.
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;; Author: Neil W. Van Dyke <nwv@acm.org>
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;; Maintainer: emacs-devel@gnu.org
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;; Created: 09-Aug-1996
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;; Keywords: comm www
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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 3 of the License, or
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;; (at your option) 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. If not, see <https://www.gnu.org/licenses/>.
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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 init file:
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;;
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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 your
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;; personal favorite sites to the hotlist.
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;; The `webjump-sample-sites' variable mostly contains some site entries that
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;; are expected to be generally relevant to many users, but excluding
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;; those that the GNU project would not want to recommend.
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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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;;; Code:
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;; TODO:
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;; - Add a menu bar and tool bar for this library.
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;; - Add commands to create/delete link from the hotlist.
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;; - Add something like a bookmark folder in modern browsers.
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;; - Add a command that can open/follow all links in a folder.
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;; - Add tags for Web sites in the hotlist.
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;;-------------------------------------------------------- Package Dependencies
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(require 'browse-url)
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;;------------------------------------------------------------------- Constants
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(defgroup webjump nil
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"Programmable Web hotlist."
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:prefix "webjump-"
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:group 'browse-url)
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(defcustom webjump-use-internal-browser nil
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"Whether or not to force the use of an internal browser.
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If non-nil, WebJump will always use an internal browser (such as
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EWW or xwidget-webkit) to open web pages, as opposed to an
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external browser like IceCat."
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:version "29.1"
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:type 'boolean)
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(defconst webjump-sample-sites
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'(
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;; FSF, not including Emacs-specific.
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("GNU Project FTP Archive" .
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;; GNU FTP Mirror List from https://www.gnu.org/order/ftp.html
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[mirrors "https://ftp.gnu.org/pub/gnu/"
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"https://ftpmirror.gnu.org"])
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("GNU Project Website" . "www.gnu.org")
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;; Emacs.
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("Emacs Website" .
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"www.gnu.org/software/emacs/emacs.html")
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("Savannah Emacs page" .
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"savannah.gnu.org/projects/emacs")
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("Emacs Lisp List" .
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"www.damtp.cam.ac.uk/user/eglen/emacs/ell.html")
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("Emacs Wiki" .
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[simple-query "www.emacswiki.org"
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"www.emacswiki.org/cgi-bin/wiki/" ""])
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;; Internet search engines.
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("DuckDuckGo" .
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[simple-query "duckduckgo.com"
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"duckduckgo.com/?q=" ""])
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("Google Groups" .
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[simple-query "groups.google.com"
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"groups.google.com/groups?q=" ""])
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("Yahoo" .
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[simple-query "www.yahoo.com" "search.yahoo.com/search?p=" ""])
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("Yahoo: Reference" . "www.yahoo.com/Reference/")
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("Wikipedia" .
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[simple-query "wikipedia.org" "wikipedia.org/wiki/" ""])
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;; Misc. general interest.
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("National Weather Service" . webjump-to-iwin)
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("Usenet FAQs" .
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"http://www.faqs.org/faqs/")
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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 Hierarchy" .
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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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;; Computer social issues, privacy, professionalism.
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("Association for Computing Machinery" . "www.acm.org")
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("Computer Professionals for Social Responsibility" . "http://www.cpsr.org")
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("Electronic Frontier Foundation" . "www.eff.org")
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("IEEE Computer Society" . "www.computer.org")
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("Risks Digest" . webjump-to-risks)
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;; More.
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("Supplemental Web site list for webjump" .
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"www.neilvandyke.org/webjump/")
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)
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"Sample hotlist for WebJump.
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See the documentation for `webjump' and `webjump-sites'.")
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(defconst 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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(defcustom webjump-sites 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 `https://', `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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:type '(alist :key-type (string :tag "Name")
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:value-type (choice :tag "URL"
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(string :tag "URL")
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function
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(vector :tag "Builtin"
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(symbol :tag "Name")
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(repeat :inline t :tag "Arguments"
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string))
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(sexp :tag "Expression to eval"))))
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;;------------------------------------------------------- Sample Site Functions
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(defun webjump-to-iwin (name)
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(let* ((prefix "http://www.nws.noaa.gov/view/")
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(state (webjump-read-choice name "state"
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(append '(("Puerto Rico" . "pr")
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("Guam" . "gu")
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("American Samoa" . "as")
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("District of Columbia" . "dc")
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("US Virgin Islands" . "vi"))
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webjump-state-to-postal-alist)))
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(opt (if state
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(webjump-read-choice
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name "option"
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'(("Hourly Report" . "hourly")
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("State Forecast" . "state")
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("Zone Forecast" . "zone")
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("Short-Term Forecast" . "shortterm")
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("Forecast Discussion" . "discussion")
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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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("Hydro Products" . "hydro")
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("Watches" . "watches")
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("Special Weather" . "special")
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("Warnings and Advisories" . "warnings")
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("Fire Weather" . "firewx"))))))
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(cond (opt (concat prefix "prodsByState.php?state=" state "&prodtype=" opt))
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(state (concat prefix "states.php?state=" state))
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(t 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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Please submit bug reports and other feedback to the author, Neil W. Van Dyke
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<nwv@acm.org>."
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(interactive)
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(let* ((completion-ignore-case t)
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(item (assoc-string
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(completing-read "WebJump to site: " webjump-sites nil t)
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webjump-sites t))
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(name (car item))
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(expr (cdr item))
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(fun (if webjump-use-internal-browser
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(apply-partially #'browse-url-with-browser-kind 'internal)
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#'browse-url)))
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(funcall fun (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 t))
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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"
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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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name))
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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 might 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 (lambda (n) (cons n n)) 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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(let ((s (char-to-string c)))
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(cond ((string= s " ") "+")
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((string-match "[a-zA-Z_./~-]" s) s)
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(t (upcase (format "%%%02x" c))))))
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(encode-coding-string str 'utf-8)
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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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;; FIXME: ftp.gnu.org and many others now prefer HTTPS instead
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;; of FTP. Does this heuristic make sense these days?
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(concat (if (string= (downcase (match-string 1 url)) "ftp")
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"ftp"
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"https")
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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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