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+;;;;
+;;;; verify.stk -- Skribe Verification 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 11:57 (eg)
+;;;; Last file update: 27-Oct-2004 16:35 (eg)
+;;;;
+
+(define-module SKRIBE-VERIFY-MODULE
+ (import SKRIBE-DEBUG-MODULE SKRIBE-ENGINE-MODULE SKRIBE-WRITER-MODULE
+ SKRIBE-RUNTIME-MODULE)
+ (export verify)
+
+
+(define-generic verify)
+
+;;;
+;;; CHECK-REQUIRED-OPTIONS
+;;;
+(define (check-required-options markup writer engine)
+ (let ((required-options (slot-ref markup 'required-options))
+ (ident (slot-ref writer 'ident))
+ (options (slot-ref writer 'options))
+ (verified? (slot-ref writer 'verified?)))
+ (or verified?
+ (eq? options 'all)
+ (begin
+ (for-each (lambda (o)
+ (if (not (memq o options))
+ (skribe-error (engine-ident engine)
+ (format "Option unsupported: ~a, supported options: ~a" o options)
+ markup)))
+ required-options)
+ (slot-set! writer 'verified? #t)))))
+
+;;;
+;;; CHECK-OPTIONS
+;;;
+(define (check-options lopts markup engine)
+
+ ;; Only keywords are checked, symbols are voluntary left unchecked. */
+ (with-debug 6 'check-options
+ (debug-item "markup=" (markup-markup markup))
+ (debug-item "options=" (slot-ref markup 'options))
+ (debug-item "lopts=" lopts)
+ (for-each
+ (lambda (o2)
+ (for-each
+ (lambda (o)
+ (if (and (keyword? o)
+ (not (eq? o :&skribe-eval-location))
+ (not (memq o lopts)))
+ (skribe-warning/ast
+ 3
+ markup
+ 'verify
+ (format "Engine ~a does not support markup ~a option `~a' -- ~a"
+ (engine-ident engine)
+ (markup-markup markup)
+ o
+ (markup-option markup o)))))
+ o2))
+ (slot-ref markup 'options))))
+
+
+;;; ======================================================================
+;;;
+;;; V E R I F Y
+;;;
+;;; ======================================================================
+
+;;; TOP
+(define-method verify ((obj <top>) e)
+ obj)
+
+;;; PAIR
+(define-method verify ((obj <pair>) e)
+ (for-each (lambda (x) (verify x e)) obj)
+ obj)
+
+;;; PROCESSOR
+(define-method verify ((obj <processor>) e)
+ (let ((combinator (slot-ref obj 'combinator))
+ (engine (slot-ref obj 'engine))
+ (body (slot-ref obj 'body)))
+ (verify body (processor-get-engine combinator engine e))
+ obj))
+
+;;; NODE
+(define-method verify ((node <node>) e)
+ ;; Verify body
+ (verify (slot-ref node 'body) e)
+ ;; Verify options
+ (for-each (lambda (o) (verify (cadr o) e))
+ (slot-ref node 'options))
+ node)
+
+;;; MARKUP
+(define-method verify ((node <markup>) e)
+ (with-debug 5 'verify::<markup>
+ (debug-item "node=" (markup-markup node))
+ (debug-item "options=" (slot-ref node 'options))
+ (debug-item "e=" (engine-ident e))
+
+ (next-method)
+
+ (let ((w (lookup-markup-writer node e)))
+ (when (writer? w)
+ (check-required-options node w e)
+ (when (pair? (writer-options w))
+ (check-options (slot-ref w 'options) node e))
+ (let ((validate (slot-ref w 'validate)))
+ (when (procedure? validate)
+ (unless (validate node e)
+ (skribe-warning
+ 1
+ node
+ (format "Node `~a' forbidden here by ~a engine"
+ (markup-markup node)
+ (engine-ident e))))))))
+ node))
+
+
+;;; DOCUMENT
+(define-method verify ((node <document>) e)
+ (next-method)
+
+ ;; verify the engine customs
+ (for-each (lambda (c)
+ (let ((i (car c))
+ (a (cadr c)))
+ (set-car! (cdr c) (verify a e))))
+ (slot-ref e 'customs))
+
+ node)
+
+
+)
+