212 lines
6.8 KiB
Plaintext
212 lines
6.8 KiB
Plaintext
;;;;
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;;;; w w w - b r o w s e r . s t k l o s -- A simple WEB browser
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;;;; -- (and a very simple mail composer)
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;;;;
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;;;; Copyright © 1993-1999 Erick Gallesio - I3S-CNRS/ESSI <eg@unice.fr>
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;;;;
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;;;; Permission to use, copy, modify, distribute,and license this
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;;;; software and its documentation for any purpose is hereby granted,
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;;;; provided that existing copyright notices are retained in all
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;;;; copies and that this notice is included verbatim in any
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;;;; distributions. No written agreement, license, or royalty fee is
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;;;; required for any of the authorized uses.
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;;;; This software is provided ``AS IS'' without express or implied
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;;;; warranty.
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;;;;
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;;;; Author: Erick Gallesio [eg@unice.fr]
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;;;; Creation date: 21-Oct-1996 14:02
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;;;; Last file update: 16-Sep-1999 17:37 (eg)
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;;;;
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(require "Tk-classes")
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(require "www")
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(import WWW)
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;;;;
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;;;; W W W : b r o w s e r
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;;;;
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(define WWW:browser
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(let ((browser #f) ;; Id of browser (#f if no browser exists)
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(lentry #f)) ;; The labeled entry of the interface
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(lambda args
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;; URL history management
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;;
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(define new-url
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(let ((history '())
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(current -1))
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(lambda (txt url)
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(case url
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((previous) (when (> (length history) 1)
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(set! current (modulo (- current 1) (length history)))
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(www:view-url (Id txt) (list-ref history current))))
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((next) (when (> (length history) 1)
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(set! current (modulo (+ current 1) (length history)))
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(www:view-url (Id txt) (list-ref history current))))
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((reload) (www:view-url (Id txt) (list-ref history current)))
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(ELSE (if (null? history)
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(begin
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(set! history (list url))
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(set! current 0))
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(unless (string=? (list-ref history current) url)
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(set! history (append history (list url)))
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(set! current (- (length history) 1)))))))))
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;;; Make interface
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;;;
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(define (make-buttons parent txt)
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(let ((s (make-toolbar parent
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`(("tb_back.gif" "Back" ,(lambda () (new-url (Id txt) 'previous)))
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2
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("tb_forward.gif" "Forward" ,(lambda () (new-url (Id txt) 'next)))
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2
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("tb_reload.gif" "Reload" ,(lambda () (new-url (Id txt) 'reload)))
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2
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("tb_stop.gif" "Stop Loading"
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,(lambda () (set! www:stop-loading #t)))
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10
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("tb_exit.gif" "Exit" ,(lambda () (destroy parent)))
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0
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("tb_info.gif" "Help" ,(lambda ()
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(STk:show-help-file "STk-hlp.html"))))
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:relief "ridge" :border-width 2
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:release-command (default-release-toolbar txt))))
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s))
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(define (make-location parent txt)
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(let* ((s (make-toolbar parent '(0)
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:relief "ridge" :border-width 2
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:release-command (default-release-toolbar txt)))
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(f (toolbar-item s 0))
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(le (make <Labeled-entry> :parent f :title "Location:"
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:font '(Courier -12))))
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(pack le :fill 'x :expand #t)
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(bind (Id le) "<Return>" (lambda () (www:view-url (Id txt) (value le))))
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;; Keep a reference on the labeled entry for later bindings
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(set! lentry le)
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s))
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(define (make-interface parent)
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(let* ((txt (make <Scroll-text> :parent parent :font '(Courier -12)
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:width 100 :height 45))
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(loc (make-location parent txt))
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(f (make-buttons parent txt))
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(f1 (make <Frame> :parent parent))
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(lab (make <Label> :parent f1 :anchor "w"))
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(gauge (make <Gauge> :parent f1 :width 200 :height 10
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:background "gray40" :foreground "IndianRed4")))
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;;
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;; Pack commponents
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(pack f loc :expand #f :fill "x")
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(pack txt :expand #t :fill "both")
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(pack f1 :expand #f :fill "x")
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(pack lab :expand #t :fill "x" :side "left")
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(pack gauge :expand #f :side "left" :padx 10)
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;; Redefinition of WWW hooks
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;;
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(set! www:hook-formatting
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(let ((counter 0)
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(pos 0))
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(lambda ()
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(when (= counter 20)
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(set! pos (modulo (+ pos 5) 105))
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(set! counter 0)
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(set! (value gauge) pos)
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(update))
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(set! counter (+ counter 1)))))
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(set! www:hook-start-loading
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(lambda ()
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(slot-set! txt 'cursor "watch")
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(slot-set! lab 'text "Loading Document ...")
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(update)))
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(set! www:hook-stop-loading
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(lambda ()
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(let ((msg "Loading Document ... Done."))
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(slot-set! gauge 'value 0)
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(slot-set! lab 'text msg)
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(slot-set! txt 'cursor "top_left_arrow")
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(set! www:stop-loading #f)
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(after 5000 (lambda ()
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(catch (if (equal? (slot-ref lab 'text) msg)
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(slot-set! lab 'text ""))))))))
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(set! www:hook-title
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(lambda (value)
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(slot-set! parent 'title value)))
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(set! www:hook-location
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(lambda (url)
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(set! (value lentry) url)
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(new-url txt url)))
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;; Return the txt widget
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txt))
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;;;;
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;;;; STk:browse starts here
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;;;;
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(let* ((url (get-keyword :url args #f))
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(parent (get-keyword :parent args #f)))
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(unless browser
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(set! browser (make-interface
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(or parent
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(make <Toplevel> :title "STk Web browser"))))
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(bind browser "<Destroy>" (lambda () (set! browser #f))))
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(when url
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(www:view-url (Id browser) url))
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browser))))
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(define (www:mailto . to)
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(let* ((top (make <Toplevel> :title "STk Mail Composer"))
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(to (make <Labeled-entry> :parent top :title "To:"
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:title-width 7 :title-anchor 'e
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:value (if (null? to) "" (car to))))
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(cc (make <Labeled-entry> :parent top :title "Cc:"
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:title-width 7 :title-anchor 'e))
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(subject (make <Labeled-entry> :parent top :title "Subject:"
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:title-width 7 :title-anchor 'e))
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(txt (make <Scroll-text> :parent top))
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(f (make <Frame> :parent top :border-width 2 :relief 'ridge))
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(send (make <Button> :text "Send" :parent f :border-width 1))
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(cancel (make <Button> :text "Cancel" :parent f :border-width 1)))
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(pack to cc subject :expand #f :fill 'x :padx 5)
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(pack txt :expand #t :fill 'both :padx 5 :pady 3)
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(pack send cancel :side 'left)
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(pack f :expand #f :fill 'x)
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;; Set the background of text to white
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(set! (background (text-of txt)) "white")
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;; Set action of Send and Cancel button
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(set! (command Cancel)
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(lambda()
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(if (eq? 'yes (Tk:message-box :title "Cancel Message"
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:icon 'question :type 'yesno
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:message "Close and discard message?"))
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(destroy top))))
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(set! (command send)
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(lambda ()
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(unless (string=? (value to) "")
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(let ((cmd (string-append "| /bin/mail "
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"-s '" (value subject) "' "
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"-c '" (value cc) "' "
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(value to))))
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(with-output-to-file cmd (lambda () (display (value txt))))
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(Tk:message-box :title "Message Information"
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:message "Message sent" :icon 'info)
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(destroy top)))))))
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;;;
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;;; Misc.
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;;;
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(define STk:web-browser WWW:browser) ; for backward compatibility with 3.x versions
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(set! www:hook-mailto www:mailto)
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(provide "www-browser")
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