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|
;*=====================================================================*/
;* serrano/prgm/project/skribe/src/bigloo/output.scm */
;* ------------------------------------------------------------- */
;* Author : Manuel Serrano */
;* Creation : Wed Jul 23 12:48:11 2003 */
;* Last change : Wed Feb 4 10:33:19 2004 (serrano) */
;* Copyright : 2003-04 Manuel Serrano */
;* ------------------------------------------------------------- */
;* The Skribe engine */
;*=====================================================================*/
;*---------------------------------------------------------------------*/
;* The module */
;*---------------------------------------------------------------------*/
(module skribe_output
(include "debug.sch")
(import skribe_types
skribe_lib
skribe_engine
skribe_writer
skribe_eval)
(export (output ::obj ::%engine . w)))
;*---------------------------------------------------------------------*/
;* output ... */
;*---------------------------------------------------------------------*/
(define (output node e . writer)
(with-debug 3 'output
(debug-item "node=" node " " (if (markup? node) (markup-markup node) ""))
(debug-item "writer=" writer)
(if (pair? writer)
(cond
((%writer? (car writer))
(out/writer node e (car writer)))
((not (car writer))
(skribe-error 'output
(format "Illegal `~a' user writer" (%engine-ident e))
(if (markup? node) (%markup-markup node) node)))
(else
(skribe-error 'output "Illegal user writer" (car writer))))
(out node e))))
;*---------------------------------------------------------------------*/
;* out/writer ... */
;*---------------------------------------------------------------------*/
(define (out/writer n e w)
(with-debug 5 'out/writer
(debug-item "n=" (find-runtime-type n)
" " (if (markup? n) (markup-markup n) ""))
(debug-item "e=" (%engine-ident e))
(debug-item "w=" (%writer-ident w))
(if (%writer? w)
(with-access::%writer w (before action after)
(invoke before n e)
(invoke action n e)
(invoke after n e)))))
;*---------------------------------------------------------------------*/
;* out ... */
;*---------------------------------------------------------------------*/
(define-generic (out node e::%engine)
(cond
((pair? node)
(out* node e))
((string? node)
(let ((f (%engine-filter e)))
(if (procedure? f)
(display (f node))
(display node))))
((number? node)
(display node))
(else
#f)))
;*---------------------------------------------------------------------*/
;* out ::%processor ... */
;*---------------------------------------------------------------------*/
(define-method (out n::%processor e::%engine)
(with-access::%processor n (combinator engine body procedure)
(let ((newe (processor-get-engine combinator engine e)))
(out (procedure body newe) newe))))
;*---------------------------------------------------------------------*/
;* out ::%command ... */
;*---------------------------------------------------------------------*/
(define-method (out node::%command e::%engine)
(with-access::%command node (fmt body)
(let ((lb (length body))
(lf (string-length fmt)))
(define (loops i n)
(if (= i lf)
(begin
(if (> n 0)
(if (<= n lb)
(output (list-ref body (- n 1)) e)
(skribe-error '!
"Too few arguments provided"
node)))
lf)
(let ((c (string-ref fmt i)))
(cond
((char=? c #\$)
(display "$")
(+ 1 i))
((not (char-numeric? c))
(cond
((= n 0)
i)
((<= n lb)
(output (list-ref body (- n 1)) e)
i)
(else
(skribe-error '!
"Too few arguments provided"
node))))
(else
(loops (+ i 1)
(+ (- (char->integer c)
(char->integer #\0))
(* 10 n))))))))
(let loop ((i 0))
(cond
((= i lf)
#f)
((not (char=? (string-ref fmt i) #\$))
(display (string-ref fmt i))
(loop (+ i 1)))
(else
(loop (loops (+ i 1) 0))))))))
;*---------------------------------------------------------------------*/
;* out ::%handle ... */
;*---------------------------------------------------------------------*/
(define-method (out node::%handle e::%engine)
#unspecified)
;*---------------------------------------------------------------------*/
;* out ::%unresolved ... */
;*---------------------------------------------------------------------*/
(define-method (out node::%unresolved e::%engine)
(error 'output "Orphan unresolved" node))
;*---------------------------------------------------------------------*/
;* out ::%markup ... */
;*---------------------------------------------------------------------*/
(define-method (out node::%markup e::%engine)
(let ((w (lookup-markup-writer node e)))
(if (writer? w)
(out/writer node e w)
(output (%markup-body node) e))))
;*---------------------------------------------------------------------*/
;* out* ... */
;*---------------------------------------------------------------------*/
(define (out* n+ e)
(let loop ((n* n+))
(cond
((pair? n*)
(out (car n*) e)
(loop (cdr n*)))
((not (null? n*))
(error 'output "Illegal argument" n*)))))
|
