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|
;*=====================================================================*/
;* serrano/prgm/project/skribe/src/bigloo/resolve.scm */
;* ------------------------------------------------------------- */
;* Author : Manuel Serrano */
;* Creation : Fri Jul 25 09:31:18 2003 */
;* Last change : Sun Jul 11 09:17:52 2004 (serrano) */
;* Copyright : 2003-04 Manuel Serrano */
;* ------------------------------------------------------------- */
;* The Skribe resolve stage */
;*=====================================================================*/
;*---------------------------------------------------------------------*/
;* The module */
;*---------------------------------------------------------------------*/
(module skribe_resolve
(include "debug.sch")
(import skribe_types
skribe_lib
skribe_bib
skribe_eval)
(import skribe_index)
(export (resolve! ::obj ::%engine ::pair-nil)
(resolve-children ::obj)
(resolve-children* ::obj)
(resolve-parent ::%ast ::pair-nil)
(resolve-search-parent ::%ast ::pair-nil ::procedure)
(resolve-counter ::%ast ::pair-nil ::symbol ::obj . o)
(resolve-ident ::bstring ::obj ::%ast ::obj)))
;*---------------------------------------------------------------------*/
;* *unresolved* ... */
;*---------------------------------------------------------------------*/
(define *unresolved* #f)
;*---------------------------------------------------------------------*/
;* resolve! ... */
;* ------------------------------------------------------------- */
;* This function iterates over an ast until all unresolved */
;* references are resolved. */
;*---------------------------------------------------------------------*/
(define (resolve! ast engine env)
(with-debug 3 'resolve
(debug-item "ast=" ast)
(let ((old *unresolved*))
(let loop ((ast ast))
(set! *unresolved* #f)
(let ((ast (do-resolve! ast engine env)))
(if *unresolved*
(loop ast)
(begin
(set! *unresolved* old)
ast)))))))
;*---------------------------------------------------------------------*/
;* do-resolve! ... */
;*---------------------------------------------------------------------*/
(define-generic (do-resolve! ast engine env)
(if (pair? ast)
(do-resolve*! ast engine env)
ast))
;*---------------------------------------------------------------------*/
;* do-resolve! ::%node ... */
;*---------------------------------------------------------------------*/
(define-method (do-resolve! node::%node engine env)
(with-access::%node node (body options parent)
(with-debug 5 'do-resolve::body
(debug-item "node=" (if (markup? node)
(markup-markup node)
(find-runtime-type node)))
(debug-item "body=" (find-runtime-type body))
(if (not (eq? parent #unspecified))
node
(let ((p (assq 'parent env)))
(set! parent (and (pair? p) (pair? (cdr p)) (cadr p)))
(if (pair? options)
(begin
(debug-item "unresolved options=" options)
(for-each (lambda (o)
(set-car! (cdr o)
(do-resolve! (cadr o) engine env)))
options)
(debug-item "resolved options=" options)))))
(set! body (do-resolve! body engine env))
node)))
;*---------------------------------------------------------------------*/
;* do-resolve! ::%container ... */
;*---------------------------------------------------------------------*/
(define-method (do-resolve! node::%container engine env0)
(with-access::%container node (body options env parent)
(with-debug 5 'do-resolve::%container
(debug-item "markup=" (markup-markup node))
(debug-item "body=" (find-runtime-type body))
(debug-item "env0=" env0)
(debug-item "env=" env)
(if (not (eq? parent #unspecified))
(let ((e `((parent ,node) ,@env ,@env0)))
(set! body (do-resolve! body engine e))
node)
(let ((p (assq 'parent env0)))
(set! parent (and (pair? p) (pair? (cdr p)) (cadr p)))
(if (pair? options)
(let ((e (append `((parent ,node)) env0)))
(debug-item "unresolved options=" options)
(for-each (lambda (o)
(set-car! (cdr o)
(do-resolve! (cadr o) engine e)))
options)
(debug-item "resolved options=" options)))
(let ((e `((parent ,node) ,@env ,@env0)))
(set! body (do-resolve! body engine e))
node))))
;; return the container
node))
;*---------------------------------------------------------------------*/
;* do-resolve! ::%document ... */
;*---------------------------------------------------------------------*/
(define-method (do-resolve! node::%document engine env0)
(with-access::%document node (env)
(call-next-method)
;; resolve the engine custom
(let ((env (append `((parent ,node)) env0)))
(for-each (lambda (c)
(let ((i (car c))
(a (cadr c)))
(debug-item "custom=" i " " a)
(set-car! (cdr c) (do-resolve! a engine env))))
(%engine-customs engine)))
;; return the container
node))
;*---------------------------------------------------------------------*/
;* do-resolve! ::%unresolved ... */
;*---------------------------------------------------------------------*/
(define-method (do-resolve! node::%unresolved engine env)
(with-debug 5 'do-resolve::%unresolved
(debug-item "node=" node)
(with-access::%unresolved node (proc parent loc)
(let ((p (assq 'parent env)))
(set! parent (and (pair? p) (pair? (cdr p)) (cadr p))))
(let ((res (proc node engine env)))
(if (ast? res) (%ast-loc-set! res loc))
(debug-item "res=" res)
(set! *unresolved* #t)
res))))
;*---------------------------------------------------------------------*/
;* do-resolve! ::handle ... */
;*---------------------------------------------------------------------*/
(define-method (do-resolve! node::%handle engine env)
node)
;*---------------------------------------------------------------------*/
;* do-resolve*! ... */
;*---------------------------------------------------------------------*/
(define (do-resolve*! n+ engine env)
(let loop ((n* n+))
(cond
((pair? n*)
(set-car! n* (do-resolve! (car n*) engine env))
(loop (cdr n*)))
((not (null? n*))
(skribe-error 'do-resolve "Illegal argument" n*))
(else
n+))))
;*---------------------------------------------------------------------*/
;* resolve-children ... */
;*---------------------------------------------------------------------*/
(define (resolve-children n)
(if (pair? n)
n
(list n)))
;*---------------------------------------------------------------------*/
;* resolve-children* ... */
;*---------------------------------------------------------------------*/
(define (resolve-children* n)
(cond
((pair? n)
(map resolve-children* n))
((%container? n)
(cons n (resolve-children* (%container-body n))))
(else
(list n))))
;*---------------------------------------------------------------------*/
;* resolve-parent ... */
;*---------------------------------------------------------------------*/
(define (resolve-parent n e)
(with-debug 5 'resolve-parent
(debug-item "n=" n)
(cond
((not (%ast? n))
(let ((c (assq 'parent e)))
(if (pair? c)
(cadr c)
n)))
((eq? (%ast-parent n) #unspecified)
(skribe-error 'resolve-parent "Orphan node" n))
(else
(%ast-parent n)))))
;*---------------------------------------------------------------------*/
;* resolve-search-parent ... */
;*---------------------------------------------------------------------*/
(define (resolve-search-parent n e pred)
(with-debug 5 'resolve-search-parent
(debug-item "node=" (find-runtime-type n))
(debug-item "searching=" pred)
(let ((p (resolve-parent n e)))
(debug-item "parent=" (find-runtime-type p) " "
(if (markup? p) (markup-markup p) "???"))
(cond
((pred p)
p)
((%unresolved? p)
p)
((not p)
#f)
(else
(resolve-search-parent p e pred))))))
;*---------------------------------------------------------------------*/
;* resolve-counter ... */
;*---------------------------------------------------------------------*/
(define (resolve-counter n e cnt val . opt)
(let ((c (assq (symbol-append cnt '-counter) e)))
(if (not (pair? c))
(if (or (null? opt) (not (car opt)) (null? e))
(skribe-error cnt "Orphan node" n)
(begin
(set-cdr! (last-pair e)
(list (list (symbol-append cnt '-counter) 0)
(list (symbol-append cnt '-env) '())))
(resolve-counter n e cnt val)))
(let* ((num (cadr c))
(nval (if (integer? val)
val
(+ 1 num))))
(let ((c2 (assq (symbol-append cnt '-env) e)))
(set-car! (cdr c2) (cons (resolve-parent n e) (cadr c2))))
(cond
((integer? val)
(set-car! (cdr c) val)
(car val))
((not val)
val)
(else
(set-car! (cdr c) (+ 1 num))
(+ 1 num)))))))
;*---------------------------------------------------------------------*/
;* resolve-ident ... */
;*---------------------------------------------------------------------*/
(define (resolve-ident ident markup n e)
(with-debug 4 'resolve-ident
(debug-item "ident=" ident)
(debug-item "markup=" markup)
(debug-item "n=" (if (markup? n) (markup-markup n) n))
(if (not (string? ident))
(skribe-type-error 'resolve-ident
"Illegal ident"
ident
"string")
(let ((mks (find-markups ident)))
(and mks
(if (not markup)
(car mks)
(let loop ((mks mks))
(cond
((null? mks)
#f)
((is-markup? (car mks) markup)
(car mks))
(else
(loop (cdr mks)))))))))))
|
