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;;; hsys-w3.el --- Hyperbole support for Emacs W3 World-Wide Web (WWW) browsing.
;; Copyright (C) 1994, 1995 Free Software Foundation, Inc.
;; Developed with support from Motorola Inc.
;; Author: Bob Weiner, Brown U.
;; Maintainer: Mats Lidell <matsl@contactor.se>
;; Keywords: comm, help, hypermedia
;; This file is part of GNU Hyperbole.
;; GNU Hyperbole is free software; you can redistribute it and/or
;; modify it under the terms of the GNU General Public License as
;; published by the Free Software Foundation; either version 2, or (at
;; your option) any later version.
;; GNU Hyperbole is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
;; General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Commentary:
;;
;; This module defines an implicit button type and associated action and
;; help types. A press of the Action Key on a unified resource locator
;; (URL) displays the referent for the URL. A press of the Help Key on a
;; URL displays a history list of previously browsed WWW documents. Press
;; the Action Key on any item from the history list to display it.
;;
;; This requires the Emacs W3 World-Wide-Web browser available from:
;; ftp://cs.indiana.edu/pub/elisp/w3/.
;;
;; It assumes that you have set up to have w3 auto-loaded according to the
;; setup instructions included with W3. Specifically, `w3-fetch' should be
;; autoloaded.
;;
;;; Code:
;;;
;;; Other required Elisp libraries
;;;
;;; Requires that 'w3' or other web browser code that is called be available.
;;;
;;; Public functions and types
;;;
(defib www-url ()
"When not in a w3 buffer, follow any non-ftp url (link) at point.
Customize `browse-url' for what browser that is used."
(if (not (eq major-mode 'w3-mode))
(let ((link-and-pos (hpath:www-at-p t)))
(if link-and-pos
(progn (ibut:label-set link-and-pos)
(hact 'www-url (car link-and-pos)))))))
(defact www-url (url)
"Follows a link given by URL using `browse-url'."
(interactive "sURL to follow: ")
(or (stringp url)
(error "(www-url): Link label must be given as a string."))
(funcall 'browse-url url))
(defun www-url:help (&optional but)
"Displays history list of www nodes previously visited with the W3 browser."
(interactive)
(if (fboundp 'w3-show-history-list)
(hact 'w3-show-history-list)
(hact 'error "(www-url:help): W3 must be loaded to display WWW history")))
(provide 'hsys-w3)
;;; hsys-w3.el ends here
|
