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;;;; e d i t o r . s t k -- A small editor to create enhanced
;;;; text (used for Help page construction)
;;;; Copyright © 1993-1999 Erick Gallesio - I3S-CNRS/ESSI <>
;;;; Permission to use, copy, modify, distribute,and license this
;;;; software and its documentation for any purpose is hereby granted,
;;;; provided that existing copyright notices are retained in all
;;;; copies and that this notice is included verbatim in any
;;;; distributions. No written agreement, license, or royalty fee is
;;;; required for any of the authorized uses.
;;;; This software is provided ``AS IS'' without express or implied
;;;; warranty.
;;;; This software is a derivative work of other copyrighted softwares; the
;;;; copyright notices of these softwares are placed in the file COPYRIGHTS
;;;; Author: Erick Gallesio []
;;;; Creation date: 6-Dec-1993 17:25
;;;; Last file update: 3-Sep-1999 19:50 (eg)
(select-module Tk)
(provide "editor")
;;;; Font definition
(define stk:STF-signature "STF-0.1")
(define stk:normal-font "*-Courier-Medium-R-Normal-*-120-*")
(define stk:all-fonts `(
(normal ,stk:normal-font)
(fixed "fixed")
(big "-*-times-*-r-*-*-*-240-*-*-*-*-*-*")
(roman-12 "-*-times-*-r-*-*-*-120-*-*-*-*-*-*")
(roman-14 "-*-times-*-r-*-*-*-140-*-*-*-*-*-*")
(roman-16 "-*-times-*-r-*-*-*-160-*-*-*-*-*-*")
(roman-18 "-*-times-*-r-*-*-*-180-*-*-*-*-*-*")
(italic-12 "-*-times-*-i-*-*-*-120-*-*-*-*-*-*")
(italic-14 "-*-times-*-i-*-*-*-140-*-*-*-*-*-*")
(italic-16 "-*-times-*-i-*-*-*-160-*-*-*-*-*-*")
(italic-18 "-*-times-*-i-*-*-*-180-*-*-*-*-*-*")
(bold-12 "-*-helvetica-bold-r-*-*-*-120-*-*-*-*-*-*")
(bold-14 "-*-helvetica-bold-r-*-*-*-140-*-*-*-*-*-*")
(bold-16 "-*-helvetica-bold-r-*-*-*-160-*-*-*-*-*-*")
(bold-18 "-*-helvetica-bold-r-*-*-*-180-*-*-*-*-*-*")
(bold-italic-12 "-*-helvetica-bold-o-*-*-*-120-*-*-*-*-*-*")
(bold-italic-14 "-*-helvetica-bold-o-*-*-*-140-*-*-*-*-*-*")
(bold-italic-16 "-*-helvetica-bold-o-*-*-*-160-*-*-*-*-*-*")
(bold-italic-18 "-*-helvetica-bold-o-*-*-*-180-*-*-*-*-*-*")
(tty-12 "-adobe-courier-medium-*-*-*-*-120-*-*-*-*-*-*")
(tty-14 "-adobe-courier-medium-*-*-*-*-140-*-*-*-*-*-*")
(tty-16 "-adobe-courier-medium-*-*-*-*-160-*-*-*-*-*-*")
(tty-18 "-adobe-courier-medium-*-*-*-*-180-*-*-*-*-*-*")))
;;;; Fonts utilities
(define (stk:unset-tags editor-window start end)
(for-each (lambda (tag)
(editor-window 'tag 'remove (car tag) start end))
(define (stk:set-font editor-window font start end)
;; Be sure this tag exists
(editor-window 'tag 'conf font :font (cadr (assoc font stk:all-fonts)))
;; Delete all the tags associated to this range
(stk:unset-tags editor-window start end)
;; Set a new tag for this character range
(editor-window 'tag 'add font start end))
(define (stk:set-underline editor-window start end)
(editor-window 'tag 'conf 'underline :underline #t)
(editor-window 'tag 'add 'underline start end))
(define (stk:fontify-selection editor-window font)
(stk:set-font editor-window
(editor-window 'index 'sel.first)
(editor-window 'index 'sel.last))))
(define (stk:underline-selection editor-window value)
(let ((start (editor-window 'index 'sel.first))
(end (editor-window 'index 'sel.last)))
;; Remove all underlining information in this area
(editor-window 'tag 'remove 'underline start end)
;; Set underline if value is #t
(when value (stk:set-underline editor-window start end)))))
;;;; Scheme Text Format (STF) management
(define (stk:get-STF editor-window)
(list stk:STF-signature
(editor-window 'get "1.0" 'end)
(let ((l '()))
(for-each (lambda (t)
(let ((tags (editor-window 'tag 'range (car t))))
(unless (null? tags)
(set! l (cons (list (car t) tags) l)))))
(cons `(underline #f) stk:all-fonts))
(define (stk:set-STF editor-window STF)
(let ((text (cadr STF)) (fmts (caddr STF)))
;; First insert new text
(editor-window 'delete "1.0" 'end)
(editor-window 'insert "1.0" text)
(editor-window 'mark 'set 'insert "1.0")
;; And now enhence it
(for-each (lambda (t)
(do ((l (cadr t) (cddr l)))
((null? l))
(if (eqv? (car t) 'underline)
(stk:set-underline editor-window (car l) (cadr l))
(stk:set-font editor-window (car t) (car l) (cadr l)))))
(define (stk:write-file editor-window file)
(with-output-to-file file
(lambda ()
(format #t ";;;; ~S\n" stk:STF-signature)
(format #t "~S\n" (stk:get-STF editor-window)))))
(define (stk:write-file-ascii editor-window file)
(with-output-to-file file
(lambda ()
(format #t "~A" (editor-window 'get "1.0" 'end)))))
(define (stk:read-file editor-window file)
(with-input-from-file file
(lambda ()
(let ((first-line (read-line)))
(if (string=? first-line (format #f ";;;; ~S" stk:STF-signature))
;; File is a STF file
(stk:set-STF editor-window (read))
;; File must be read as a "normal" file
(editor-window 'delete "1.0" 'end)
(do ((l first-line (read-line)))
((eof-object? l))
(editor-window 'insert 'end l)
(editor-window 'insert 'end "\n"))
(editor-window 'mark 'set 'insert "1.0")))))))
(define (stk:get-filename toplevel) ; return the content of the file name entry
(let ((entry (string->widget (& toplevel ".bt.e"))))
(entry 'get)))
(define (stk:set-filename toplevel filename)
(let ((entry (string->widget (& toplevel ".bt.e"))))
(entry 'delete 0 'end)
(entry 'insert 0 filename)))
;;;; Interface
(define (stk:make-editor name . exit_code)
(let* ((top (toplevel name))
(menu-bar (frame (& name ".mb") :bd 2 :relief "groove"))
(bottom (frame (& name ".bt")))
(text-area (frame (& name ".ta")))
(exit_code (if (null? exit_code) `(destroy ,top) (car exit_code)))
(the-editor ()))
;; Window manager management
(wm 'maxsize name 1000 800)
(wm 'protocol name "WM_DELETE_WINDOW" exit_code)
;; Text area frame
(pack [scrollbar (& text-area ".sc") :orient "vert"
:bd 2
:relief "groove"
:command (format #f "~A 'yview"
(& text-area ".ed"))]
:side "left" :fill "y")
(pack [text (& text-area ".ed") :padx 4
:pady 4
:bd 2
:wrap "word"
:relief "groove"
:yscroll (format #f "~A 'set"
(& text-area ".sc"))]
:side "right" :expand #t :fill "both")
(set! the-editor (string->widget (& text-area ".ed")))
;; Menu Creation
(let* ((File (menubutton (& menu-bar ".file")
:text "File"
:padx 10
:menu (& menu-bar ".file.m")))
(m (eval (menu (& menu-bar ".file.m")))))
(m 'add 'command
:label " Read "
:command `(stk:read-file ,the-editor (stk:get-filename ,top)))
(m 'add 'command
:label " Save "
:command `(stk:write-file ,the-editor (stk:get-filename ,top)))
(m 'add 'command
:label " Save Ascii "
:command `(stk:write-file-ascii ,the-editor (stk:get-filename ,top)))
(m 'add 'separator)
(m 'add 'command :label " Quit " :command exit_code)
(pack File :side "left"))
(let* ((Font (menubutton (& menu-bar ".font")
:text "Font"
:padx 10
:menu (& menu-bar ".font.m")))
(m (eval (menu (& menu-bar ".font.m")))))
(for-each (lambda(font)
(m 'add 'command
:label (car font)
:font (cadr font)
:command `(stk:fontify-selection ,the-editor
',(car font))))
(m 'add 'separator)
(m 'add 'command
:label "Underline"
:command `(stk:underline-selection ,the-editor #t))
(m 'add 'command
:label "No underline"
:command `(stk:underline-selection ,the-editor #f))
(pack Font :side "left"))
;; Bottom frame
(pack [label (& bottom ".l") :text "File name" :padx 10] :side "left")
(pack [entry (& bottom ".e") :relief "ridge"] :side "left" :expand #t :fill "x")
;; Pack everybody
(pack menu-bar :fill "x")
(pack text-area :expand #t :fill "both")
(pack bottom :fill "x" :ipady 4 :ipadx 10)))
;; A simple editor accessible from prompt
(define (ed . file)
(require "editor")
(let ((editor-name (gensym ".editor")))
(stk:make-editor editor-name)
(unless (null? file)
(stk:read-file (string->widget (& editor-name ".ta.ed")) (car file))
(stk:set-filename editor-name (car file)))))