--- /dev/null
+#!/usr/bin/guile \
+-e main -s
+!#
+;;;; as2text.scm -- Translate AsciiScript to Text
+;;;;
+;;;; source file of the GNU LilyPond music typesetter
+;;;;
+;;;; (c) 2000 Jan Nieuwenhuizen <janneke@gnu.org>
+
+;;;; library funtions
+(use-modules
+ (ice-9 debug)
+ (ice-9 getopt-long)
+ (ice-9 string-fun)
+ (ice-9 regex))
+
+
+;;; Script stuff
+(define program-name "as2text")
+
+(define subst-version "@TOPLEVEL_VERSION@")
+
+(define program-version
+ (if (eq? subst-version (string-append "@" "TOPLEVEL_VERSION" "@"))
+ "unknown"
+ subst-version))
+
+(define (show-version)
+ (display (string-append
+ program-name " - LilyPond version " program-version "\n")
+ (current-error-port)))
+
+(define (show-help)
+ (display "Convert AsciiScript to text.
+
+Usage: as2text [OPTION]... AS-FILE
+
+Options:
+ -h,--help this help
+ -o,--output=FILE set output file
+ -v,--version show version
+" (current-error-port)))
+
+(define (gulp-file name)
+ (let ((port (catch 'system-error (lambda () (open-file name "r"))
+ (lambda args #f))))
+ (if port
+ (let ((content (let loop ((text ""))
+ (let ((line (read-line port)))
+ (if (or (eof-object? line)
+ (not line))
+ text
+ (loop (string-append text line "\n")))))))
+ (close port)
+ content)
+ (begin
+ (display
+ (string-append "warning: no such file: " name "\n")
+ (current-error-port))
+ ""))))
+
+(define (with-exention name ext)
+ (if (equal? ext (substring name (max 0 (- (string-length name)
+ (string-length ext)))))
+ name
+ (string-append name ext)))
+
+(define (do-file file-name output-name)
+ (let ((output-file (current-output-port))
+ (ascii-script (gulp-file (with-exention file-name ".as"))))
+ (eval-string ascii-script)))
+
+;;; Script entry point
+(define (main args)
+ (show-version)
+ (let ((options (getopt-long args
+ `((output (single-char #\o)
+ (value #t))
+ (help (single-char #\h))
+ (version (single-char #\v))))))
+ (define (opt tag default)
+ (let ((pair (assq tag options)))
+ (if pair (cdr pair) default)))
+
+ (if (assq 'help options)
+ (begin (show-help) (exit 0)))
+
+ (if (assq 'version options)
+ (exit 0))
+
+ (let ((output-name (opt 'output-name "-"))
+ (files (let ((foo (opt '() '())))
+ (if (null? foo)
+ (list "-")
+ foo))))
+ (do-file (car files) output-name))))
+
+;;;;
+;;;; Ascii Script plotting
+;;;;
+
+;;; Global variables
+
+;; Ascii-Art signature
+(define tag-line "lily")
+
+(define first-line #t)
+
+;; cursor
+(define cur-x 0)
+(define cur-y 0)
+
+;; canvas dimensions
+(define canvas-width 65)
+(define canvas-height 20)
+
+;; font database
+(define fonts '())
+
+;; current font
+(define cur-font "")
+
+;;
+(define line-char "-")
+
+;; the plotting fields
+(define canvas 0)
+;; urg:
+;; make-uniform array of characters,
+;; or 1-dim array of strings?
+;; (set! canvas (make-array " " canvas-height canvas-width)))
+
+;; urg, this kind of naming costs too much indenting
+(define (split c s r)
+ (separate-fields-discarding-char c s r))
+
+(define (strip s)
+ (sans-surrounding-whitespace s))
+
+
+;;; Helper functions
+
+(define (af-gulp-file name)
+ (set! %load-path
+ (cons (string-append
+ (getenv 'LILYPONDPREFIX) "/mf") %load-path))
+ (let ((path (%search-load-path name)))
+ (if path
+ (gulp-file path)
+ (gulp-file name))))
+
+(define (char-width c)
+ (let ((bbox (car c)))
+ (inexact->exact (* .001 (caddr bbox)))))
+
+;; urg: use smart table
+(define (xmerge-chars old new)
+ (cond ((equal? new " ") old)
+ ((and (equal? old "|") (equal? new "-")) "+")
+ ((and (equal? old "-") (equal? new "|")) "+")
+ (else new)))
+
+(define (merge-chars old new)
+ (cond ((equal? new " ") old)
+ (else new)))
+
+(define (plot x y c)
+ (let ((ny (- (* -1 y) 1)))
+ (if (array-in-bounds? canvas ny x)
+ (array-set! canvas (merge-chars (array-ref canvas ny x) c) ny x)
+ (display (string-append "ouch: " (number->string x) ","
+ (number->string ny) "\n")))))
+
+(define (plot-char c)
+ (let ((bbox (car c))
+ (glyph (cadr c)))
+ ;; BBox: (llx lly urx ury) * 1000
+ (let ((dx (inexact->exact (* .001 (car bbox))))
+ ;(dy (inexact->exact (* .001 (cadr bbox))))
+ (dy (inexact->exact (- (* .001 (cadddr bbox)) 1)))
+ (len (length glyph)))
+ ;;(display "Bbox: ") (display bbox) (newline)
+ ;;(display "dy: ") (display dy) (newline)
+ (do ((line glyph (cdr line))
+ (i 0 (+ i 1)))
+ ((= i len))
+ (plot-string (+ cur-x dx) (+ (- cur-y i) dy) (car line))))))
+
+(define (plot-string x y s)
+ (do ((i 0 (+ i 1)))
+ ((= i (string-length s)))
+ (plot (+ x i) y (substring s i (+ i 1)))))
+
+(define (show-char char)
+ (display char))
+
+(define (show-font name)
+ (let ((font (assoc name fonts)))
+ (map (lambda (x) (show-char x)) font)))
+
+(define (generate-default-font)
+ (let loop ((chars '()) (i 32))
+ (if (= 127 i)
+ chars
+ (loop
+ (cons (list i '(0 0 1000 1000)
+ (list (make-string 1 (integer->char i))))
+ chars)
+ (+ i 1)))))
+
+(define (get-font name)
+ (let ((entry (assoc name fonts)))
+ (if entry
+ (cdr entry)
+ (begin
+ (display
+ (string-append "warning: no such font: " name "\n")
+ (current-error-port))
+ (get-font "default")))))
+
+(define (get-char font n)
+ (let ((entry (assoc n font)))
+ (if entry
+ (cdr entry)
+ (begin
+ (display
+ (string-append "warning: no such char: ("
+ cur-font
+ ", "
+ (number->string n ) ")\n")
+ (current-error-port))
+ '()))))
+
+
+;;; AsciiScript commands
+
+(define (char n)
+ (let* ((font (get-font cur-font))
+ (c (get-char font n)))
+ (if c
+ (plot-char c))))
+
+(define (end-output)
+ (display (string-append
+ (make-string (- canvas-width (string-length tag-line)) #\space)
+ tag-line "\n")))
+
+(define (sign x)
+ (if (= x 0)
+ 1
+ (inexact->exact (/ x (abs x)))))
+
+(define (h-line len)
+ (let ((step (sign len)))
+ (do ((i 0 (+ i step)))
+ ((= i len))
+ (plot (+ cur-x i) cur-y line-char))))
+
+(define (v-line len)
+ (let ((step (sign len)))
+ (do ((i 0 (+ i step)))
+ ((= i len)) (plot cur-x (+ cur-y i) line-char))))
+
+(define (header x y)
+ (display (string-append x y "\n") (current-error-port)))
+
+(define (header-end) "")
+
+(define (rline-to dx dy)
+ (plot (inexact->exact cur-x) (inexact->exact cur-y) line-char)
+ (plot (inexact->exact (+ cur-x dx)) (inexact->exact (+ cur-y dy)) line-char)
+ (if (or (> (abs dx) 1) (> (abs dy) 1))
+ (let ((x cur-x)
+ (y cur-y)
+ (hx (/ dx 2))
+ (hy (/ dy 2))
+ )
+ (plot (inexact->exact (+ cur-x hx)) (inexact->exact (+ cur-y hy)) line-char)
+ (rline-to hx hy)
+ (move-to x y)
+ (rmove-to hx hy)
+ (rline-to hx hy)
+ )))
+
+(define (dissect-char text)
+ (let* ((char (split #\nl text list))
+ (id (car char))
+ (code (string->number
+ (strip
+ (substring id
+ (+ (string-index id #\C) 1)
+ (string-index id #\;)))))
+ (bbox (map string->number
+ (split #\space (strip (substring
+ id
+ (+ (string-rindex id #\B) 1)
+ (string-rindex id #\;)))
+ list))))
+ (list (list code bbox (cdr char)))))
+
+(define (load-font name mag)
+ (let ((text (af-gulp-file (string-append name ".af"))))
+ (if (< 0 (string-length text))
+ (let* ((char-list (cdr (split #\np
+ (regexp-substitute/global
+ #f "\t[^\n]*\n" text 'pre "" 'post)
+ list)))
+ (font (apply append (map dissect-char char-list))))
+ (set! fonts (cons (cons name font) fonts))))))
+
+(define (move-to x y)
+ (set! cur-x x)
+ (set! cur-y y))
+
+(define (put c)
+ (plot cur-x cur-y c))
+
+(define (rmove-to dx dy)
+ (set! cur-x (+ cur-x dx))
+ (set! cur-y (+ cur-y dy)))
+
+(define (select-font name)
+ (set! cur-font name))
+
+(define (set-line-char c)
+ (set! line-char c))
+
+(define (start-line height)
+ (if first-line
+ (begin
+ (set! first-line #f)
+ (set! fonts (cons (cons "default" (generate-default-font)) fonts))))
+ (if (defined? 'mudelapaperlinewidth)
+ (set! canvas-width
+ (inexact->exact (string->number mudelapaperlinewidth))))
+ (set! canvas-height height)
+ (set! canvas (make-array " " canvas-height canvas-width)))
+
+(define (stop-line)
+ (display
+ (apply string-append
+ (map (lambda (x) (string-append (apply string-append x) "\n"))
+ (array->list canvas)))))
+
+(define (text s)
+ (let ((n (string-length s))
+ (font (get-font cur-font)))
+ (do ((i 0 (+ i 1)))
+ ((= i n))
+ (let* ((n (char->integer (string-ref s i)))
+ (c (get-char font n)))
+ (plot-char c)
+ (rmove-to (char-width c) 0)))))
+
projects / lilypond.git / commitdiff