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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)
+ :use-module (skribe debug)
+ :use-module (skribe runtime)
+ :use-module (skribe types)
+
+ :use-module (oop goops)
+
+ :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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