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1 ;;!emacs
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2 ;;
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3 ;; FILE: hsys-w3.el
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4 ;; SUMMARY: Hyperbole support for Emacs W3 World-Wide Web (WWW) browsing.
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5 ;; USAGE: GNU Emacs Lisp Library
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6 ;; KEYWORDS: comm, help, hypermedia
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7 ;;
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8 ;; AUTHOR: Bob Weiner
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9 ;; ORG: Motorola Inc.
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10 ;;
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11 ;; ORIG-DATE: 7-Apr-94 at 17:17:39 by Bob Weiner
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12 ;; LAST-MOD: 10-Mar-97 at 12:17:08 by Bob Weiner
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13 ;;
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14 ;; This file is part of Hyperbole.
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15 ;; Available for use and distribution under the same terms as GNU Emacs.
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16 ;;
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17 ;; Copyright (C) 1994, 1995 Free Software Foundation, Inc.
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18 ;; Developed with support from Motorola Inc.
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19 ;;
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20 ;; DESCRIPTION:
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21 ;;
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22 ;; This module defines an implicit button type and associated action and
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23 ;; help types. A press of the Action Key on a unified resource locator
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24 ;; (URL) displays the referent for the URL. A press of the Help Key on a
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25 ;; URL displays a history list of previously browsed WWW documents. Press
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26 ;; the Action Key on any item from the history list to display it.
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27 ;;
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28 ;; This requires the Emacs W3 World-Wide-Web browser available from:
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29 ;; ftp://cs.indiana.edu/pub/elisp/w3/.
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30 ;;
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31 ;; It assumes that you have set up to have w3 auto-loaded according to the
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32 ;; setup instructions included with W3. Specifically, `w3-fetch' should be
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33 ;; autoloaded.
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34 ;;
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35 ;; DESCRIP-END.
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36
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37 ;;; ************************************************************************
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38 ;;; Other required Elisp libraries
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39 ;;; ************************************************************************
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40
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41 ;;; Requires that 'w3' or other web browser code that is called be available.
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42
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43 ;;; ************************************************************************
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44 ;;; Public functions and types
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45 ;;; ************************************************************************
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46
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47 (defib www-url ()
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48 "When not in a w3 buffer, follow any non-ftp url (link) at point.
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49 The variable, `action-key-url-function,' can be used to customize the url
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50 browser that is used."
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51 (if (not (eq major-mode 'w3-mode))
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52 (let ((link-and-pos (hpath:www-at-p t)))
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53 (if link-and-pos
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54 (progn (ibut:label-set link-and-pos)
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55 (hact 'www-url (car link-and-pos)))))))
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56
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57 (defact www-url (url)
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58 "Follows a link given by URL.
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59 The variable, `action-key-url-function,' can be used to customize the url
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60 browser that is used."
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61 (interactive "sURL to follow: ")
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62 (or (stringp url)
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63 (error "(www-url): Link label must be given as a string."))
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64 (and (symbolp action-key-url-function)
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65 (memq action-key-url-function
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66 '(highlight-headers-follow-url-netscape
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67 highlight-headers-follow-url-mosaic))
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68 (require 'highlight-headers))
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69 (if window-system
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70 (funcall action-key-url-function url)
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71 (w3-fetch url)))
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72
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73 (defun www-url:help (&optional but)
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74 "Displays history list of www nodes previously visited with the W3 browser."
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75 (interactive)
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76 (if (fboundp 'w3-show-history-list)
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77 (hact 'w3-show-history-list)
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78 (hact 'error "(www-url:help): W3 must be loaded to display WWW history")))
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79
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80 (provide 'hsys-w3)
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