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;;;;
;;;; resolve.stk -- Skribe Resolve Stage
;;;;
;;;; Copyright � 2003-2004 Erick Gallesio - I3S-CNRS/ESSI <eg@unice.fr>
;;;;
;;;;
;;;; This program is free software; you can redistribute it and/or modify
;;;; it under the terms of the GNU General Public License as published by
;;;; the Free Software Foundation; either version 2 of the License, or
;;;; (at your option) any later version.
;;;;
;;;; This program is distributed in the hope that it will be useful,
;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;;;; GNU General Public License for more details.
;;;;
;;;; You should have received a copy of the GNU General Public License
;;;; along with this program; if not, write to the Free Software
;;;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
;;;; USA.
;;;;
;;;; Author: Erick Gallesio [eg@essi.fr]
;;;; Creation date: 13-Aug-2003 18:39 (eg)
;;;; Last file update: 17-Feb-2004 14:43 (eg)
;;;;
(define-module SKRIBE-RESOLVE-MODULE
(import SKRIBE-DEBUG-MODULE SKRIBE-RUNTIME-MODULE)
(export resolve! resolve-search-parent resolve-children resolve-children*
find1 resolve-counter resolve-parent resolve-ident)
(define *unresolved* #f)
(define-generic do-resolve!)
;;;; ======================================================================
;;;;
;;;; 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)
(fluid-let ((*unresolved* #f))
(let Loop ((ast ast))
(set! *unresolved* #f)
(let ((ast (do-resolve! ast engine env)))
(if *unresolved*
(Loop ast)
ast))))))
;;;; ======================================================================
;;;;
;;;; D O - R E S O L V E !
;;;;
;;;; ======================================================================
(define-method do-resolve! (ast engine env)
ast)
(define-method do-resolve! ((ast <pair>) engine env)
(let Loop ((n* ast))
(cond
((pair? n*)
(set-car! n* (do-resolve! (car n*) engine env))
(Loop (cdr n*)))
((not (null? n*))
(error 'do-resolve "Illegal argument" n*))
(else
ast))))
(define-method do-resolve! ((node <node>) engine env)
(let ((body (slot-ref node 'body))
(options (slot-ref node 'options))
(parent (slot-ref node 'parent)))
(with-debug 5 'do-resolve<body>
(debug-item "body=" body)
(when (eq? parent 'unspecified)
(let ((p (assq 'parent env)))
(slot-set! node 'parent (and (pair? p) (pair? (cdr p)) (cadr p)))
(when (pair? options)
(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))))
(slot-set! node 'body (do-resolve! body engine env))
node)))
(define-method do-resolve! ((node <container>) engine env0)
(let ((body (slot-ref node 'body))
(options (slot-ref node 'options))
(env (slot-ref node 'env))
(parent (slot-ref node 'parent)))
(with-debug 5 'do-resolve<container>
(debug-item "markup=" (markup-markup node))
(debug-item "body=" body)
(debug-item "env0=" env0)
(debug-item "env=" env)
(when (eq? parent 'unspecified)
(let ((p (assq 'parent env0)))
(slot-set! node 'parent (and (pair? p) (pair? (cdr p)) (cadr p)))
(when (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)))
(slot-set! node 'body (do-resolve! body engine e)))))
node)))
(define-method do-resolve! ((node <document>) engine env0)
(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))))
(slot-ref engine 'customs)))
node)
(define-method do-resolve! ((node <unresolved>) engine env)
(with-debug 5 'do-resolve<unresolved>
(debug-item "node=" node)
(let ((p (assq 'parent env)))
(slot-set! node 'parent (and (pair? p) (pair? (cdr p)) (cadr p))))
(let* ((proc (slot-ref node 'proc))
(res (resolve! (proc node engine env) engine env))
(loc (ast-loc node)))
(when (ast? res)
(ast-loc-set! res loc))
(debug-item "res=" res)
(set! *unresolved* #t)
res)))
(define-method do-resolve! ((node <handle>) engine env)
node)
;;;; ======================================================================
;;;;
;;;; RESOLVE-PARENT
;;;;
;;;; ======================================================================
(define (resolve-parent n e)
(with-debug 5 'resolve-parent
(debug-item "n=" n)
(cond
((not (is-a? n <ast>))
(let ((c (assq 'parent e)))
(if (pair? c)
(cadr c)
n)))
((eq? (slot-ref n 'parent) 'unspecified)
(skribe-error 'resolve-parent "Orphan node" n))
(else
(slot-ref n 'parent)))))
;;;; ======================================================================
;;;;
;;;; RESOLVE-SEARCH-PARENT
;;;;
;;;; ======================================================================
(define (resolve-search-parent n e pred)
(with-debug 5 'resolve-search-parent
(debug-item "node=" n)
(debug-item "searching=" pred)
(let ((p (resolve-parent n e)))
(debug-item "parent=" p " "
(if (is-a? p 'markup) (slot-ref p 'markup) "???"))
(cond
((pred p) p)
((is-a? p <unresolved>) p)
((not p) #f)
(else (resolve-search-parent p e pred))))))
;;;; ======================================================================
;;;;
;;;; RESOLVE-COUNTER
;;;;
;;;; ======================================================================
;;FIXME: factoriser
(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)))))))))))
)
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