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comparison lisp/hyperbole/hsys-www.el @ 0:376386a54a3c r19-14

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date Mon, 13 Aug 2007 08:45:50 +0200
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1 ;;!emacs
2 ;;
3 ;; FILE: hsys-www.el
4 ;; SUMMARY: Hyperbole support for old CERN command line WWW browsing.
5 ;; USAGE: GNU Emacs Lisp Library
6 ;; KEYWORDS: comm, help, hypermedia
7 ;;
8 ;; AUTHOR: Bob Weiner
9 ;; ORG: Brown U.
10 ;;
11 ;; ORIG-DATE: 12-Oct-91 at 03:48:23
12 ;; LAST-MOD: 14-Apr-95 at 16:09:23 by Bob Weiner
13 ;;
14 ;; This file is part of Hyperbole.
15 ;; Available for use and distribution under the same terms as GNU Emacs.
16 ;;
17 ;; Copyright (C) 1991-1995, Free Software Foundation, Inc.
18 ;; Developed with support from Motorola Inc.
19 ;;
20 ;; DESCRIPTION:
21 ;;
22 ;; You must first build the www line mode browser executable before you can
23 ;; use this system encapsulation. The browser MUST be configured so that
24 ;; the final part of its prompt is a line beginning with "==> " without a
25 ;; trailing newline, like so:
26 ;;
27 ;; <ref.number>, Back, Quit, or Help.
28 ;; ==>
29 ;;
30 ;;
31 ;; Then, a Hyperbole button should be created that has 'hwww:start' as its
32 ;; action type. It may optionally contain a file name argument as
33 ;; the initial file to display. When selected, it starts a 'www'
34 ;; process and displays the initial file.
35 ;;
36 ;; The 'hwww:link-follow' implicit button type is then used when the
37 ;; user clicks inside the buffer containing the 'www' output. It
38 ;; passes commands to the 'hwww:link-follow' action type.
39 ;;
40 ;; DESCRIP-END.
41
42 ;;; ************************************************************************
43 ;;; Other required Elisp libraries
44 ;;; ************************************************************************
45
46 ;;; Requires external 'www' executable available via anonymous ftp
47 ;;; from info.cern.ch.
48
49 ;;; ************************************************************************
50 ;;; Public variables
51 ;;; ************************************************************************
52
53 (defib hwww:link-follow ()
54 "When in a www buffer, returns a link follow or history recall command."
55 (let* ((www (get-buffer-process (current-buffer)))
56 (www-proc-nm (and www (process-name www)))
57 (selection)
58 (act (function
59 (lambda (&optional prefix)
60 (setq selection
61 (buffer-substring (match-beginning 1)
62 (match-end 1)))
63 (ibut:label-set selection (match-beginning 1)
64 (match-end 1))
65 (hact 'hwww:link-follow (concat prefix selection))))))
66 (if (and www-proc-nm (equal (string-match "www" www-proc-nm) 0))
67 (cond (;; Hyper ref
68 (save-excursion
69 (skip-chars-backward "^ \t\n")
70 (looking-at "[^][ \t\n]*\\[\\([0-9]+\\)\\]"))
71 (funcall act))
72 (;; History list entry
73 (save-excursion
74 (beginning-of-line)
75 (looking-at "[ \t]*\\([0-9]+\\)\)[ \t]+[^ \t\n]"))
76 (funcall act "recall "))
77 (;; Hyper ref list
78 (save-excursion
79 (beginning-of-line)
80 (looking-at "[ \t]*\\[\\([0-9]+\\)\\][ \t]+[^ \t\n]"))
81 (funcall act ))))))
82
83 (defact hwww:link-follow (link-num-str)
84 "Follows a link given by LINK-NUM-STR or displays a www history list."
85 (interactive "sNumber of WWW link to follow: ")
86 (or (stringp link-num-str)
87 (error "(hwww:link-follow): Link number must be given as a string."))
88 (let ((www (get-buffer-process (current-buffer))))
89 (if www
90 (progn
91 (setq buffer-read-only nil)
92 (erase-buffer)
93 (process-send-string www (concat link-num-str "\n"))
94 )
95 (error "(hwww:link-follow): No current WWW process. Use 'hwww:start'."))))
96
97 (defun hwww:link-follow:help (&optional but)
98 "Displays history list of www nodes previously visited."
99 (interactive)
100 (hact 'hwww:link-follow "recall"))
101
102 (defact hwww:start (&optional file)
103 "Starts a www process and displays optional FILE.
104 Without FILE (an empty string), displays default initial www file."
105 (interactive "FWWW file to start with: ")
106 (or (stringp file)
107 (error "(hwww:start): FILE argument is not a string."))
108 (let ((www-buf (get-buffer-create "WWW"))
109 (www-proc (get-process "www")))
110 (save-excursion
111 (set-buffer www-buf)
112 (setq buffer-read-only nil)
113 (erase-buffer)
114 )
115 (if www-proc
116 (pop-to-buffer www-buf)
117 (if (setq www-proc
118 (if (or (equal file "") (equal file "\"\""))
119 (start-process "www" www-buf "www" "-p")
120 (start-process "www" www-buf "www" "-p" file)))
121 (progn (set-process-sentinel www-proc 'hwww:sentinel)
122 (set-process-filter www-proc 'hwww:filter)
123 (process-kill-without-query www-proc)
124 (pop-to-buffer www-buf)
125 (shell-mode)
126 (make-local-variable 'explicit-shell-file-name)
127 (setq explicit-shell-file-name "www")
128 (use-local-map hwww:mode-map)
129 (if hwww:mode-map
130 nil
131 (setq hwww:mode-map (copy-keymap shell-mode-map))
132 (define-key hwww:mode-map "\C-m" 'hwww:send-input)
133 (define-key hwww:mode-map " " 'hwww:scroll-up)
134 (define-key hwww:mode-map "\177" 'hwww:scroll-down)
135 )
136 (goto-char (point-min))
137 )))))
138
139 ;;; ************************************************************************
140 ;;; Private functions
141 ;;; ************************************************************************
142
143 (defun hwww:filter (process str)
144 (if (and (> (length str) 3)
145 (equal "==> " (substring str -4)))
146 (progn
147 (insert str)
148 (goto-char (point-min))
149 (hproperty:but-create (concat "\\([^ \t\n]*\\[[0-9]+\\]\\|"
150 "^[ \t]*\\[\\([0-9]+\\)\\][ \t]+[^ \t\n]+\\|"
151 "^[ ]+[0-9]+\).*\\)")
152 'regexp))
153 (insert str)))
154
155 (defun hwww:scroll-up (&optional arg)
156 "If on last line of buffer, insert space, else scroll up a page."
157 (interactive "P")
158 (if (last-line-p) (insert " ") (scroll-up arg)))
159
160 (defun hwww:scroll-down (&optional arg)
161 "If on last line of buffer, delete char backwards, else scroll down a page."
162 (interactive "P")
163 (if (last-line-p) (backward-delete-char-untabify (or arg 1))
164 (scroll-down arg)))
165
166 (defun hwww:send-input ()
167 (interactive)
168 (cond ((eobp)
169 (let ((www (get-buffer-process (current-buffer))))
170 (if www
171 (progn
172 (beginning-of-line)
173 ;; Exclude the shell prompt, if any.
174 (re-search-forward shell-prompt-pattern
175 (save-excursion (end-of-line) (point))
176 t)
177 (let ((cmd (concat (buffer-substring (point)
178 (progn (forward-line 1)
179 (point)))
180 "\n")))
181 (erase-buffer)
182 (process-send-string www cmd)
183 ))
184 (error "(hwww:link-follow): No current WWW process. Use 'hwww:start'."))))
185 ((ibut:at-p) (hui:hbut-act))
186 (t (end-of-buffer))
187 ))
188
189 (defun hwww:sentinel (process signal)
190 (princ
191 (format "Process: %s received the msg: %s" process signal))
192 (or (string-match "killed" signal)
193 (pop-to-buffer (process-buffer process))))
194
195 ;;; ************************************************************************
196 ;;; Private variables
197 ;;; ************************************************************************
198
199 (defvar hwww:mode-map nil)
200
201 (provide 'hsys-www)