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|
;*=====================================================================*/
;* serrano/prgm/project/skribe/src/bigloo/writer.scm */
;* ------------------------------------------------------------- */
;* Author : Manuel Serrano */
;* Creation : Tue Sep 9 06:19:57 2003 */
;* Last change : Tue Nov 2 14:33:59 2004 (serrano) */
;* Copyright : 2003-04 Manuel Serrano */
;* ------------------------------------------------------------- */
;* Skribe writer management */
;*=====================================================================*/
;*---------------------------------------------------------------------*/
;* The module */
;*---------------------------------------------------------------------*/
(module skribe_writer
(option (set! dsssl-symbol->keyword
(lambda (s)
(string->keyword
(string-append ":" (symbol->string s))))))
(include "debug.sch")
(import skribe_types
skribe_eval
skribe_param
skribe_engine
skribe_output
skribe_lib)
(export (invoke proc node e)
(lookup-markup-writer ::%markup ::%engine)
(markup-writer ::obj #!optional e #!key p class opt va bef aft act)
(copy-markup-writer ::obj ::obj #!optional e #!key p c o v b ac a)
(markup-writer-get ::obj #!optional e #!key class pred)
(markup-writer-get*::pair-nil ::obj #!optional e #!key class)))
;*---------------------------------------------------------------------*/
;* invoke ... */
;*---------------------------------------------------------------------*/
(define (invoke proc node e)
(let ((id (if (markup? node)
(string->symbol
(format "~a#~a"
(%engine-ident e)
(%markup-markup node)))
(%engine-ident e))))
(with-push-trace id
(with-debug 5 'invoke
(debug-item "e=" (%engine-ident e))
(debug-item "node=" (find-runtime-type node)
" " (if (markup? node) (%markup-markup node) ""))
(if (string? proc)
(display proc)
(if (procedure? proc)
(proc node e)))))))
;*---------------------------------------------------------------------*/
;* lookup-markup-writer ... */
;*---------------------------------------------------------------------*/
(define (lookup-markup-writer node e)
(with-access::%engine e (writers delegate)
(let loop ((w* writers))
(cond
((pair? w*)
(with-access::%writer (car w*) (pred)
(if (pred node e)
(car w*)
(loop (cdr w*)))))
((engine? delegate)
(lookup-markup-writer node delegate))
(else
#f)))))
;*---------------------------------------------------------------------*/
;* make-writer-predicate ... */
;*---------------------------------------------------------------------*/
(define (make-writer-predicate markup predicate class)
(let* ((t1 (if (symbol? markup)
(lambda (n e) (is-markup? n markup))
(lambda (n e) #t)))
(t2 (if class
(lambda (n e)
(and (t1 n e) (equal? (%markup-class n) class)))
t1)))
(if predicate
(cond
((not (procedure? predicate))
(skribe-error 'markup-writer
"Illegal predicate (procedure expected)"
predicate))
((not (correct-arity? predicate 2))
(skribe-error 'markup-writer
"Illegal predicate arity (2 arguments expected)"
predicate))
(else
(lambda (n e)
(and (t2 n e) (predicate n e)))))
t2)))
;*---------------------------------------------------------------------*/
;* markup-writer ... */
;*---------------------------------------------------------------------*/
(define (markup-writer markup
#!optional
engine
#!key
(predicate #f)
(class #f)
(options '())
(validate #f)
(before #f)
(action #unspecified)
(after #f))
(let ((e (or engine (default-engine))))
(cond
((and (not (symbol? markup)) (not (eq? markup #t)))
(skribe-error 'markup-writer "Illegal markup" markup))
((not (engine? e))
(skribe-error 'markup-writer "Illegal engine" e))
((and (not predicate)
(not class)
(null? options)
(not before)
(eq? action #unspecified)
(not after))
(skribe-error 'markup-writer "Illegal writer" markup))
(else
(let ((m (make-writer-predicate markup predicate class))
(ac (if (eq? action #unspecified)
(lambda (n e)
(output (markup-body n) e))
action)))
(engine-add-writer! e markup m predicate
options before ac after class validate))))))
;*---------------------------------------------------------------------*/
;* copy-markup-writer ... */
;*---------------------------------------------------------------------*/
(define (copy-markup-writer markup old-engine
#!optional new-engine
#!key
(predicate #unspecified)
(class #unspecified)
(options #unspecified)
(validate #unspecified)
(before #unspecified)
(action #unspecified)
(after #unspecified))
(let ((old (markup-writer-get markup old-engine))
(new-engine (or new-engine old-engine)))
(markup-writer markup new-engine
:pred (if (unspecified? predicate)
(%writer-pred old)
predicate)
:class (if (unspecified? class)
(%writer-class old)
class)
:options (if (unspecified? options)
(%writer-options old)
options)
:validate (if (unspecified? validate)
(%writer-validate old)
validate)
:before (if (unspecified? before)
(%writer-before old)
before)
:action (if (unspecified? action)
(%writer-action old)
action)
:after (if (unspecified? after)
(%writer-after old) after))))
;*---------------------------------------------------------------------*/
;* markup-writer-get ... */
;* ------------------------------------------------------------- */
;* Finds the writer that matches MARKUP with optional CLASS */
;* attribute. */
;*---------------------------------------------------------------------*/
(define (markup-writer-get markup #!optional engine #!key (class #f) (pred #f))
(let ((e (or engine (default-engine))))
(cond
((not (symbol? markup))
(skribe-error 'markup-writer "Illegal symbol" markup))
((not (engine? e))
(skribe-error 'markup-writer "Illegal engine" e))
(else
(let liip ((e e))
(let loop ((w* (%engine-writers e)))
(cond
((pair? w*)
(if (and (eq? (%writer-ident (car w*)) markup)
(equal? (%writer-class (car w*)) class)
(or (eq? pred #unspecified)
(eq? (%writer-upred (car w*)) pred)))
(car w*)
(loop (cdr w*))))
((engine? (%engine-delegate e))
(liip (%engine-delegate e)))
(else
#f))))))))
;*---------------------------------------------------------------------*/
;* markup-writer-get* ... */
;* ------------------------------------------------------------- */
;* Finds alll writers that matches MARKUP with optional CLASS */
;* attribute. */
;*---------------------------------------------------------------------*/
(define (markup-writer-get* markup #!optional engine #!key (class #f))
(let ((e (or engine (default-engine))))
(cond
((not (symbol? markup))
(skribe-error 'markup-writer "Illegal symbol" markup))
((not (engine? e))
(skribe-error 'markup-writer "Illegal engine" e))
(else
(let liip ((e e)
(res '()))
(let loop ((w* (%engine-writers e))
(res res))
(cond
((pair? w*)
(if (and (eq? (%writer-ident (car w*)) markup)
(equal? (%writer-class (car w*)) class))
(loop (cdr w*) (cons (car w*) res))
(loop (cdr w*) res)))
((engine? (%engine-delegate e))
(liip (%engine-delegate e) res))
(else
(reverse! res)))))))))
|
