Overhaul: emphasized logical separation of the modules.

* src/guile/skribilo/types.scm: Removed.  Moved the class and method
  definitions in the relevant files.

* src/guile/skribilo/ast.scm: New.

* src/guile/skribilo/location.scm: New.

* src/guile/skribilo/parameters.scm: Same as part of the former
  `vars.scm' except that it uses fluids instead of globals.

* src/guile/skribilo/vars.scm: Renamed to `compat.scm'.

* doc/Makefile: Removed (generated by `configure').

git-archimport-id: lcourtes@laas.fr--2004-libre/skribilo--devel--1.2--patch-11

20 files changed, 916 insertions, 959 deletions

diff --git a/src/guile/skribilo.scm b/src/guile/skribilo.scm
index 33c2bb4..c4a5eac 100755
--- a/src/guile/skribilo.scm
+++ b/src/guile/skribilo.scm
@@ -60,23 +60,21 @@ exec ${GUILE-guile} --debug -l $0 -c "(apply $main (cdr (command-line)))" "$@"
 
 
 
-(define-module (skribilo))
+(define-module (skribilo)
+  :autoload (skribilo module) (make-run-time-module)
+  :autoload (skribilo engine) (*current-engine*))
 
-(use-modules (skribilo module)
-	     (skribilo runtime)
-	     (skribilo evaluator)
-	     (skribilo types)
-	     (skribilo engine)
+(use-modules (skribilo evaluator)
 	     (skribilo debug)
-	     (skribilo vars)
+	     (skribilo parameters)
 	     (skribilo lib)
 
+	     (srfi srfi-39)
 	     (ice-9 optargs)
 	     (ice-9 getopt-long))
 
 
 
-;;; FIXME:  With my `#:reader' thing added to `define-module',
 
 
 
@@ -351,7 +349,7 @@ Processes a Skribilo/Skribe source file and produces its output.
 
 (define (load-rc)
   (if *load-rc*
-    (let ((file (make-path *skribe-rc-directory* *skribe-rc-file*)))
+    (let ((file (make-path (*rc-directory*) (*rc-file*))))
       (if (and file (file-exists? file))
 	(load file)))))
 
@@ -373,8 +371,15 @@ Processes a Skribilo/Skribe source file and produces its output.
 ; 	 (skribe-eval-port (current-input-port) *skribe-engine*))))
 
 (define (doskribe)
-  (set-current-module (make-run-time-module))
-  (skribe-eval-port (current-input-port) *skribe-engine*))
+  (let ((user-module (current-module)))
+    (dynamic-wind
+	(lambda ()
+	  (set-current-module (make-run-time-module)))
+	(lambda ()
+	  (format #t "engine is ~a~%" (*current-engine*))
+	  (skribe-eval-port (current-input-port) (*current-engine*)))
+	(lambda ()
+	  (set-current-module user-module)))))
 
 
 ;;;; ======================================================================
@@ -407,8 +412,6 @@ Processes a Skribilo/Skribe source file and produces its output.
 
     ;; Parse the most important options.
 
-    (set! *skribe-engine* engine)
-
     (set-skribe-debug! (string->number debugging-level))
 
     (if (> (skribe-debug) 4)
@@ -416,54 +419,50 @@ Processes a Skribilo/Skribe source file and produces its output.
 	      (lambda (file)
 		(format #t "~~ loading `~a'...~%" file))))
 
-    (set! %skribilo-load-path
-	  (cons load-path %skribilo-load-path))
-    (set! %skribilo-bib-path
-	  (cons bib-path %skribilo-bib-path))
-
-    (if (option-ref options 'verbose #f)
-	(set! *skribe-verbose* #t))
-
-    ;; Load the user rc file
-    ;(load-rc)
-
-    ;; Load the base file to bootstrap the system as well as the files
-    ;; that are in the PRELOAD variable.
-    (find-engine 'base)
-    (for-each (lambda (f)
-		(skribe-load f :engine *skribe-engine*))
-	      preload)
-
-    ;; Load the specified variants.
-    (for-each (lambda (x)
-		(skribe-load (format #f "~a.skr" x) :engine *skribe-engine*))
-	      (reverse! variants))
-
-    (let ((files (option-ref options '() '())))
-
-      (if (> (length files) 2)
-	  (error "you can specify at most one input file and one output file"
-		 files))
-
-      (let* ((source-file (if (null? files) #f (car files)))
-	     (dest-file (if (or (not source-file)
-				(null? (cdr files)))
-			    #f
-			    (cadr files)))
-	     (do-it! (lambda ()
-		       (if (string? dest-file)
-			   (with-output-to-file dest-file doskribe)
-			   (doskribe)))))
-
-	(set! *skribe-dest* dest-file)
-
-	(if (and dest-file (file-exists? dest-file))
-	    (delete-file dest-file))
-
-	(if source-file
-	    (with-input-from-file source-file
-	      do-it!)
-	    (do-it!))))))
+    (parameterize ((*current-engine* engine)
+		   (*document-path*  (cons load-path (*document-path*)))
+		   (*bib-path*       (cons bib-path (*bib-path*)))
+		   (*verbose*        (option-ref options 'verbose #f)))
+
+      ;; Load the user rc file
+      ;;(load-rc)
+
+      (for-each (lambda (f)
+		  (skribe-load f :engine (*current-engine*)))
+		preload)
+
+      ;; Load the specified variants.
+      (for-each (lambda (x)
+		  (skribe-load (format #f "~a.skr" x)
+			       :engine (*current-engine*)))
+		(reverse! variants))
+
+      (let ((files (option-ref options '() '())))
+
+	(if (> (length files) 2)
+	    (error "you can specify at most one input file and one output file"
+		   files))
+
+	(let* ((source-file (if (null? files) #f (car files)))
+	       (dest-file (if (or (not source-file)
+				  (null? (cdr files)))
+			      #f
+			      (cadr files)))
+	       (do-it! (lambda ()
+			 (if (string? dest-file)
+			     (with-output-to-file dest-file doskribe)
+			     (doskribe)))))
+
+	  (parameterize ((*destination-file* dest-file)
+			 (*source-file*      source-file))
+
+	    (if (and dest-file (file-exists? dest-file))
+		(delete-file dest-file))
+
+	    ;;	(start-stack 7
+	    (if source-file
+		(with-input-from-file source-file do-it!)
+		(do-it!))))))))
 
 
 (define main skribilo)
diff --git a/src/guile/skribilo/types.scm b/src/guile/skribilo/ast.scm
index ac1edc4..fc6859e 100644
--- a/src/guile/skribilo/types.scm
+++ b/src/guile/skribilo/ast.scm
@@ -1,7 +1,7 @@
+;;; ast.scm  --  Skribilo abstract syntax trees.
 ;;;
-;;; types.stk	-- Definition of Skribe classes
-;;;
-;;; Copyright © 2003-2004 Erick Gallesio - I3S-CNRS/ESSI <eg@unice.fr>
+;;; Copyright 2003-2004  Erick Gallesio - I3S-CNRS/ESSI <eg@unice.fr>
+;;; Copyright 2005  Ludovic Courtès <ludovic.courtes@laas.fr>
 ;;;
 ;;;
 ;;; This program is free software; you can redistribute it and/or modify
@@ -18,37 +18,43 @@
 ;;; along with this program; if not, write to the Free Software
 ;;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
 ;;; USA.
+
+(define-module (skribilo ast)
+  :use-module (oop goops)
+  :autoload (skribilo location) (location?)
+  :export (<ast> ast? ast-loc ast-loc-set!
+		 ast-parent ast->string
+
+	   <command> command? command-fmt command-body
+	   <unresolved> unresolved? unresolved-proc
+	   <handle> handle? handle-ast handle-body
+	   <node> node? node-options node-loc
+	   <processor> processor? processor-combinator processor-engine
+
+	   <markup> markup? bind-markup! markup-options is-markup?
+		    markup-markup markup-body markup-ident markup-class
+		    find-markups
+		    markup-option markup-option-add! markup-output
+		    markup-parent markup-document markup-chapter
+
+	   <container> container? container-options
+		       container-ident container-body
+		       container-env-get
+
+	   <document> document? document-ident document-body
+		      document-options document-end))
+
+;;; Author:  Ludovic Courtès
+;;;
+;;; Commentary:
 ;;;
-;;;           Author: Erick Gallesio [eg@essi.fr]
-;;;    Creation date: 12-Aug-2003 22:18 (eg)
-;;; Last file update: 28-Oct-2004 16:18 (eg)
+;;; The abstract syntax tree (AST) and its sub-types.  These class form the
+;;; core of a document: each part of a document is an instance of `<ast>' or
+;;; one of its sub-classes.
 ;;;
+;;; Code:
 
 (read-set! keywords 'prefix)
-(define-module (skribilo types)  ;; FIXME:  Why should it be a separate module?
-   :export (<ast> ast? ast-loc ast-loc-set!
-	    <command> command? command-fmt command-body
-	    <unresolved> unresolved? unresolved-proc
-	    <handle> handle? handle-ast
-	    <node> node? node-options node-loc
-	    <engine> engine? engine-ident engine-format engine-customs
-		     engine-filter engine-symbol-table
-	    <writer> writer? write-object writer-options writer-ident
-	             writer-before writer-action writer-after writer-class
-	    <processor> processor? processor-combinator processor-engine
-	    <markup> markup? bind-markup! markup-options is-markup?
-		     markup-markup markup-body markup-ident markup-class
-		     find-markups write-object
-	    <container> container? container-options
-			container-ident container-body
-	    <document> document? document-ident document-body
-		       document-options document-end
-	    <language> language? language-extractor language-fontifier
-	    <location> location? ast-location
-	    location-file location-line location-pos
-
-	    *node-table*)
-   :use-module (oop goops))
 
 (define *node-table* (make-hash-table))
 					; Used to stores the nodes of  an AST.
@@ -56,6 +62,7 @@
 					; identifier.
 
 
+
 ;;; ======================================================================
 ;;;
 ;;;				<AST>
@@ -70,7 +77,36 @@
 (define (ast? obj)		(is-a? obj <ast>))
 (define (ast-loc obj)		(slot-ref obj 'loc))
 (define (ast-loc-set! obj v)	(slot-set! obj 'loc v))
+(define (ast-parent n)
+  (slot-ref n 'parent))
 
+
+(define (ast->file-location ast)
+   (let ((l (ast-loc ast)))
+     (if (location? l)
+	 (format #f "~a:~a:" (location-file l) (location-line l))
+	 "")))
+
+(define-generic ast->string)
+
+(define-method (ast->string (ast <top>))     "")
+(define-method (ast->string (ast <string>))  ast)
+(define-method (ast->string (ast <number>))  (number->string ast))
+
+(define-method (ast->string (ast <pair>))
+  (let ((out (open-output-string)))
+    (let Loop ((lst ast))
+      (cond
+	((null? lst)
+	   (get-output-string out))
+	(else
+	   (display (ast->string (car lst)) out)
+	   (unless (null? (cdr lst))
+	     (display #\space out))
+	   (Loop (cdr lst)))))))
+
+
+
 ;;; ======================================================================
 ;;;
 ;;;				<COMMAND>
@@ -105,70 +141,7 @@
 
 (define (handle? obj)     (is-a? obj <handle>))
 (define (handle-ast obj)  (slot-ref obj 'ast))
-
-;;; ======================================================================
-;;;
-;;;				<ENGINE>
-;;;
-;;; ======================================================================
-(define-class <engine> ()
-  (ident		:init-keyword :ident		:init-value '???)
-  (format		:init-keyword :format		:init-value "raw")
-  (info		:init-keyword :info		:init-value '())
-  (version		:init-keyword :version		:init-value 'unspecified)
-  (delegate		:init-keyword :delegate		:init-value #f)
-  (writers		:init-keyword :writers		:init-value '())
-  (filter		:init-keyword :filter		:init-value #f)
-  (customs		:init-keyword :custom		:init-value '())
-  (symbol-table	:init-keyword :symbol-table	:init-value '()))
-
-
-
-
-(define (engine? obj)
-  (is-a? obj <engine>))
-
-(define (engine-ident obj)	;; Define it here since the doc searches it
-  (slot-ref obj 'ident))
-
-(define (engine-format obj)	;; Define it here since the doc searches it
-  (slot-ref obj 'format))
-
-(define (engine-customs obj)	;; Define it here since the doc searches it
-  (slot-ref obj 'customs))
-
-(define (engine-filter obj)	;; Define it here since the doc searches it
-  (slot-ref obj 'filter))
-
-(define (engine-symbol-table obj)	;; Define it here since the doc searches it
-  (slot-ref obj 'symbol-table))
-
-;;; ======================================================================
-;;;
-;;;				<WRITER>
-;;;
-;;; ======================================================================
-(define-class <writer> ()
-  (ident	:init-keyword :ident	 :init-value '??? :getter writer-ident)
-  (class	:init-keyword :class	 :init-value 'unspecified
-		:getter writer-class)
-  (pred	:init-keyword :pred	 :init-value 'unspecified)
-  (upred	:init-keyword :upred	 :init-value 'unspecified)
-  (options	:init-keyword :options	 :init-value '()  :getter writer-options)
-  (verified?	:init-keyword :verified? :init-value #f)
-  (validate	:init-keyword :validate  :init-value #f)
-  (before	:init-keyword :before	 :init-value #f   :getter writer-before)
-  (action	:init-keyword :action	 :init-value #f   :getter writer-action)
-  (after	:init-keyword :after	 :init-value #f   :getter writer-after))
-
-(define (writer? obj)
-  (is-a? obj <writer>))
-
-(define-method (write-object (obj <writer>) port)
-  (format port "#[~A (~A) ~A]"
-	  (class-name (class-of obj))
-	  (slot-ref obj 'ident)
-	  (address-of obj)))
+(define (handle-body h)   (slot-ref h 'body))
 
 ;;; ======================================================================
 ;;;
@@ -185,6 +158,9 @@
 (define (node-options obj) (slot-ref obj 'options))
 (define node-loc	   ast-loc)
 
+(define-method (ast->string (ast <node>))
+  (ast->string (slot-ref ast 'body)))
+
 
 ;;; ======================================================================
 ;;;
@@ -200,6 +176,8 @@
 (define (processor-combinator obj) (slot-ref obj 'combinator))
 (define (processor-engine obj)     (slot-ref obj 'engine))
 
+
+
 ;;; ======================================================================
 ;;;
 ;;;				<MARKUP>
@@ -227,12 +205,49 @@
 (define (markup-options obj)	(slot-ref obj 'options))
 (define markup-body    node-body)
 
+(define (markup-option m opt)
+  (if (markup? m)
+      (let ((c (assq opt (slot-ref m 'options))))
+	(and (pair? c) (pair? (cdr c))
+	     (cadr c)))
+      (skribe-type-error 'markup-option "Illegal markup: " m "markup")))
+
+
+(define (markup-option-add! m opt val)
+  (if (markup? m)
+      (slot-set! m 'options (cons (list opt val)
+				  (slot-ref m 'options)))
+      (skribe-type-error 'markup-option "Illegal markup: " m "markup")))
+
 
 (define (is-markup? obj markup)
   (and (is-a? obj <markup>)
        (eq? (slot-ref obj 'markup) markup)))
 
 
+(define (markup-parent m)
+  (let ((p (slot-ref m 'parent)))
+    (if (eq? p 'unspecified)
+	(skribe-error 'markup-parent "Unresolved parent reference" m)
+	p)))
+
+(define (markup-document m)
+  (let Loop ((p m)
+	     (l #f))
+    (cond
+      ((is-markup? p 'document)           p)
+      ((or (eq? p 'unspecified) (not p))  l)
+      (else			          (Loop (slot-ref p 'parent) p)))))
+
+(define (markup-chapter m)
+  (let loop ((p m)
+	     (l #f))
+    (cond
+      ((is-markup? p 'chapter)           p)
+      ((or (eq? p 'unspecified) (not p)) l)
+      (else				 (loop (slot-ref p 'parent) p)))))
+
+
 
 (define (find-markups ident)
   (hash-ref *node-table* ident #f))
@@ -245,6 +260,35 @@
 	  (slot-ref obj 'ident)
 	  (address-of obj)))
 
+
+;;; XXX: This was already commented out in the original Skribe source.
+;;;
+;; (define (markup-output markup
+;;		       :optional (engine    #f)
+;;		       :key	 (predicate #f)
+;;				 (options  '())
+;;				 (before    #f)
+;;				 (action    #f)
+;;				 (after     #f))
+;;   (let ((e (or engine (use-engine))))
+;;     (cond
+;;       ((not (is-a? e <engine>))
+;;           (skribe-error 'markup-writer "illegal engine" e))
+;;       ((and (not before)
+;;	    (not action)
+;;	    (not after))
+;;           (%find-markup-output e markup))
+;;       (else
+;;	  (let ((mp (if (procedure? predicate)
+;;			(lambda (n e) (and (is-markup? n markup) (predicate n e)))
+;;			(lambda (n e) (is-markup? n markup)))))
+;;	    (engine-output e markup mp options
+;;			   (or before (slot-ref e 'default-before))
+;;			   (or action (slot-ref e 'default-action))
+;;			   (or after  (slot-ref e 'default-after))))))))
+
+
+
 ;;; ======================================================================
 ;;;
 ;;;				<CONTAINER>
@@ -259,6 +303,9 @@
 (define container-ident     markup-ident)
 (define container-body      node-body)
 
+(define (container-env-get m key)
+  (let ((c (assq key (slot-ref m 'env))))
+    (and (pair? c) (cadr c))))
 
 
 ;;; ======================================================================
@@ -275,45 +322,6 @@
 (define document-env         container-env)
 
 
+;;; arch-tag: e2489bd6-1b6d-4b03-bdfb-83cffd2f7ce7
 
-;;; ======================================================================
-;;;
-;;;				<LANGUAGE>
-;;;
-;;; ======================================================================
-(define-class <language> ()
-  (name	:init-keyword :name	 :init-value #f :getter langage-name)
-  (fontifier	:init-keyword :fontifier :init-value #f :getter language-fontifier)
-  (extractor	:init-keyword :extractor :init-value #f :getter language-extractor))
-
-(define (language? obj)
-  (is-a? obj <language>))
-
-
-;;; ======================================================================
-;;;
-;;;				<LOCATION>
-;;;
-;;; ======================================================================
-(define-class <location> ()
-  (file :init-keyword :file :getter location-file)
-  (pos  :init-keyword :pos  :getter location-pos)
-  (line :init-keyword :line :getter location-line))
-
-(define (location? obj)
-  (is-a? obj <location>))
-
-(define (ast-location obj)
-  (let ((loc (slot-ref obj 'loc)))
-    (if (location? loc)
-	(let* ((fname (location-file loc))
-	       (line  (location-line loc))
-	       (pwd   (getcwd))
-	       (len   (string-length pwd))
-	       (lenf  (string-length fname))
-	       (file  (if (and (substring=? pwd fname len)
-			       (> lenf len))
-			  (substring fname len (+ 1 (string-length fname)))
-			  fname)))
-	  (format #f "~a, line ~a" file line))
-	"no source location")))
+;;; ast.scm ends here
diff --git a/src/guile/skribilo/biblio.scm b/src/guile/skribilo/biblio.scm
index f3ddf97..dd04f68 100644
--- a/src/guile/skribilo/biblio.scm
+++ b/src/guile/skribilo/biblio.scm
@@ -1,7 +1,6 @@
+;;; biblio.scm  --  Bibliography functions.
 ;;;
-;;; biblio.scm				-- Bibliography functions
-;;;
-;;; Copyright © 2003-2004 Erick Gallesio - I3S-CNRS/ESSI <eg@essi.fr>
+;;; Copyright 2003-2004  Erick Gallesio - I3S-CNRS/ESSI <eg@essi.fr>
 ;;; Copyright 2005  Ludovic Courtès <ludovic.courtes@laas.fr>
 ;;;
 ;;; This program is free software; you can redistribute it and/or modify
@@ -18,21 +17,22 @@
 ;;; along with this program; if not, write to the Free Software
 ;;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
 ;;; USA.main.st
-;;;
-;;;           Author: Erick Gallesio [eg@essi.fr]
-;;;    Creation date: 31-Aug-2003 22:07 (eg)
-;;; Last file update: 28-Oct-2004 21:19 (eg)
-;;;
 
 
 
 (define-module (skribilo biblio)
   :use-module (skribilo runtime)
   :use-module (skribilo lib)      ;; `when', `unless'
-  :use-module (skribilo vars)
+  :use-module (skribilo module)
+  :use-module (skribilo skribe bib) ;; `make-bib-entry'
+  :autoload   (skribilo parameters)  (*bib-path*)
+  :autoload   (ice-9 format)         (format)
   :export (bib-table? make-bib-table default-bib-table
 	   bib-add!))
 
+
+
+;; FIXME: Should be a fluid?
 (define *bib-table*	     #f)
 
 ;; Forward declarations
@@ -76,13 +76,13 @@
   (let ((ofrom (markup-option old 'from)))
     (skribe-warning 2
 		    'bib
-		    (format "Duplicated bibliographic entry ~a'.\n" ident)
+		    (format #f "duplicated bibliographic entry ~a'.\n" ident)
 		    (if ofrom
-			(format " Using version of `~a'.\n" ofrom)
+			(format #f " using version of `~a'.\n" ofrom)
 			"")
 		    (if from
-			(format " Ignoring version of `~a'." from)
-			" Ignoring redefinition."))))
+			(format #f " ignoring version of `~a'." from)
+			" ignoring redefinition."))))
 
 
 ;;; ======================================================================
@@ -99,14 +99,13 @@
 	    (cond
 	      ((and (list? entry) (> (length entry) 2))
 	       (let* ((kind   (car entry))
-		      (key    (format "~A" (cadr entry)))
+		      (key    (format #f "~A" (cadr entry)))
 		      (fields (cddr entry))
-		      (old    (hashtable-get table key)))
+		      (old    (hash-ref table key)))
 		 (if old
 		     (bib-duplicate ident from old)
-		     (hash-table-put! table
-				      key
-				      (make-bib-entry kind key fields from)))
+		     (hash-set! table key
+				(make-bib-entry kind key fields from)))
 		 (Loop (read port))))
 	      (else
 	       (%bib-error 'bib-parse entry))))))))
@@ -124,14 +123,13 @@
 		  (cond
 		    ((and (list? entry) (> (length entry) 2))
 		     (let* ((kind   (car entry))
-			    (key    (format "~A" (cadr entry)))
+			    (key    (format #f "~A" (cadr entry)))
 			    (fields (cddr entry))
-			    (old    (hashtable-get table ident)))
+			    (old    (hash-ref table key)))
 		       (if old
 			   (bib-duplicate key #f old)
-			   (hash-table-put! table
-					    key
-					    (make-bib-entry kind key fields #f)))))
+			   (hash-set! table key
+				      (make-bib-entry kind key fields #f)))))
 		    (else
 		     (%bib-error 'bib-add! entry))))
 		entries)))
@@ -144,14 +142,14 @@
 ;;; ======================================================================
 ;; FIXME: Factoriser
 (define (skribe-open-bib-file file command)
- (let ((path (search-path *skribe-bib-path* file)))
+ (let ((path (search-path (*bib-path*) file)))
    (if (string? path)
        (begin
-	 (when (> *skribe-verbose* 0)
+	 (when (> (*verbose*) 0)
 	   (format (current-error-port) "  [loading bibliography: ~S]\n" path))
 	 (open-input-file (if (string? command)
 			      (string-append "| "
-					     (format command path))
+					     (format #f command path))
 			      path)))
        (begin
 	 (skribe-warning 1
diff --git a/src/guile/skribilo/compat.scm b/src/guile/skribilo/compat.scm
new file mode 100644
index 0000000..c90af1d
--- /dev/null
+++ b/src/guile/skribilo/compat.scm
@@ -0,0 +1,155 @@
+;;; compat.scm  --  Skribe compatibility module.
+;;;
+;;; Copyright 2005  Ludovic Courtès  <ludovic.courtes@laas.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.
+
+
+(define-module (skribilo compat)
+  :use-module (skribilo parameters)
+  :use-module (srfi srfi-1))
+
+
+;;;
+;;; Global variables that have been replaced by parameter objects
+;;; in `(skribilo parameters)'.
+;;;
+
+;;; Switches
+(define-public *skribe-verbose*	0)
+(define-public *skribe-warning*	5)
+(define-public *load-rc*		#t)
+
+
+;;; Path variables
+(define-public *skribe-path*		#f)
+(define-public *skribe-bib-path*	'("."))
+(define-public *skribe-source-path*	'("."))
+(define-public *skribe-image-path*	'("."))
+
+
+(define-public *skribe-rc-directory*
+  (string-append (getenv "HOME") "/" ".skribilo"))
+
+
+;;; In and out ports
+(define-public *skribe-src*		'())
+(define-public *skribe-dest*		#f)
+
+;;; Engine
+(define-public *skribe-engine*	'html)	;; Use HTML by default
+
+;;; Misc
+(define-public *skribe-chapter-split*	'())
+(define-public *skribe-ref-base*	#f)
+(define-public *skribe-convert-image*  #f)	;; i.e. use the Skribe standard converter
+(define-public *skribe-variants*	'())
+
+
+
+;;;
+;;; Accessors mapped to parameter objects.
+;;;
+
+(define-public skribe-path        *document-path*)
+(define-public skribe-image-path  *image-path*)
+(define-public skribe-source-path *source-path*)
+(define-public skribe-bib-path    *bib-path*)
+
+
+;;;
+;;; Compatibility with Bigloo.
+;;;
+
+(define-public (substring=? s1 s2 len)
+  (let ((l1 (string-length s1))
+	(l2 (string-length s2)))
+    (let Loop ((i 0))
+      (cond
+	((= i len) #t)
+	((= i l1)  #f)
+	((= i l2)  #f)
+	((char=? (string-ref s1 i) (string-ref s2 i)) (Loop (+ i 1)))
+	(else #f)))))
+
+(define-public (directory->list str)
+  (map basename (glob (string-append str "/*") (string-append "/.*"))))
+
+(define-macro (printf . args)   `(format #t ,@args))
+(export-syntax printf)
+(define-public fprintf			format)
+
+(define-public (fprint port . args)
+  (if port
+      (with-output-to-port port
+	(lambda ()
+	  (for-each display args)
+	  (display "\n")))))
+
+(define-public (file-prefix fn)
+  (if fn
+      (let ((match (regexp-match "(.*)\\.([^/]*$)" fn)))
+	(if match
+	    (cadr match)
+	    fn))
+      "./SKRIBILO-OUTPUT"))
+
+(define-public (file-suffix s)
+  ;; Not completely correct, but sufficient here
+  (let* ((basename (regexp-replace "^(.*)/(.*)$" s "\\2"))
+	 (split    (string-split basename ".")))
+    (if (> (length split) 1)
+	(car (reverse! split))
+	"")))
+
+(define-public prefix			file-prefix)
+(define-public suffix			file-suffix)
+(define-public system->string		system)  ;; FIXME
+(define-public any?			any)
+(define-public every?			every)
+(define-public find-file/path		(lambda (. args)
+				  (format #t "find-file/path: ~a~%" args)
+				  #f))
+(define-public process-input-port	#f) ;process-input)
+(define-public process-output-port	#f) ;process-output)
+(define-public process-error-port	#f) ;process-error)
+
+;;; hash tables
+(define-public make-hashtable		make-hash-table)
+(define-public hashtable?		hash-table?)
+(define-public hashtable-get		(lambda (h k) (hash-ref h k #f)))
+(define-public hashtable-put!		hash-set!)
+(define-public hashtable-update!	hash-set!)
+(define-public hashtable->list	(lambda (h)
+                          (map cdr (hash-map->list cons h))))
+
+(define-public find-runtime-type	(lambda (obj) obj))
+
+
+
+;;;
+;;; Miscellaneous.
+;;;
+
+(use-modules ((srfi srfi-19) #:renamer (symbol-prefix-proc 's19:)))
+
+(define (date)
+  (s19:date->string (s19:current-date) "~c"))
+
+
+
+;;; compat.scm ends here
diff --git a/src/guile/skribilo/engine.scm b/src/guile/skribilo/engine.scm
index 0353e2d..5b18b5c 100644
--- a/src/guile/skribilo/engine.scm
+++ b/src/guile/skribilo/engine.scm
@@ -1,7 +1,6 @@
+;;; engine.scm	-- Skribilo engines.
 ;;;
-;;; engine.scm	-- Skribe Engines Stuff
-;;;
-;;; Copyright © 2003-2004 Erick Gallesio - I3S-CNRS/ESSI <eg@essi.fr>
+;;; Copyright 2003-2004  Erick Gallesio - I3S-CNRS/ESSI <eg@essi.fr>
 ;;; Copyright 2005  Ludovic Courtès  <ludovic.courtes@laas.fr>
 ;;;
 ;;;
@@ -19,24 +18,24 @@
 ;;; 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: 24-Jul-2003 20:33 (eg)
-;;; Last file update: 28-Oct-2004 21:21 (eg)
-;;;
 
 (define-module (skribilo engine)
-  :use-module (skribilo module)
   :use-module (skribilo debug)
-  :use-module (skribilo writer)
-  :use-module (skribilo types)
   :use-module (skribilo lib)
-  :use-module (skribilo vars)
+
+  ;; `(skribilo writer)' depends on this module so it needs to be loaded
+  ;; after we defined `<engine>' and the likes.
+  :autoload (skribilo writer) (<writer>)
 
   :use-module (oop goops)
   :use-module (ice-9 optargs)
+  :autoload   (srfi srfi-39)  (make-parameter)
 
-  :export (default-engine default-engine-set!
+  :export (<engine> engine? engine-ident engine-format
+		    engine-customs engine-filter engine-symbol-table
+
+	   *current-engine*
+	   default-engine default-engine-set!
 	   make-engine copy-engine find-engine lookup-engine
 	   engine-custom engine-custom-set!
 	   engine-format? engine-add-writer!
@@ -45,10 +44,47 @@
 
 
 
+
+;;;
+;;; Class definition.
+;;;
+
+(define-class <engine> ()
+  (ident		:init-keyword :ident		:init-value '???)
+  (format		:init-keyword :format		:init-value "raw")
+  (info		:init-keyword :info		:init-value '())
+  (version		:init-keyword :version
+			:init-value 'unspecified)
+  (delegate		:init-keyword :delegate		:init-value #f)
+  (writers		:init-keyword :writers		:init-value '())
+  (filter		:init-keyword :filter		:init-value #f)
+  (customs		:init-keyword :custom		:init-value '())
+  (symbol-table	:init-keyword :symbol-table	:init-value '()))
+
+
+(define (engine? obj)
+  (is-a? obj <engine>))
+
+(define (engine-ident obj)
+  (slot-ref obj 'ident))
+
+(define (engine-format obj)
+  (slot-ref obj 'format))
+
+(define (engine-customs obj)
+  (slot-ref obj 'customs))
+
+(define (engine-filter obj)
+  (slot-ref obj 'filter))
 
-;;; Module definition is split here because this file is read by the
-;;; documentation Should be changed.
-;(select-module SKRIBE-ENGINE-MODULE)
+(define (engine-symbol-table obj)
+  (slot-ref obj 'symbol-table))
+
+
+
+;;;
+;;; Default engines.
+;;;
 
 (define *engines*		'())
 (define *default-engine*	#f)
@@ -97,8 +133,7 @@
 (define (engine-format? fmt . e)
   (let ((e (cond
 	     ((pair? e) (car e))
-	     ((engine? *skribe-engine*) *skribe-engine*)
-	     (else (find-engine *skribe-engine*)))))
+	     (else (*current-engine*)))))
     (if (not (engine? e))
 	(skribe-error 'engine-format? "no engine" e)
 	(string=? fmt (engine-format e)))))
@@ -164,9 +199,11 @@ otherwise the requested engine is returned."
   (false-if-exception (apply lookup-engine args)))
 
 
+
 ;;;
-;;; ENGINE-CUSTOM
+;;; Engine methods.
 ;;;
+
 (define (engine-custom e id)
   (let* ((customs (slot-ref e 'customs))
 	 (c       (assq id customs)))
@@ -175,9 +212,6 @@ otherwise the requested engine is returned."
 	'unspecified)))
 
 
-;;;
-;;; ENGINE-CUSTOM-SET!
-;;;
 (define (engine-custom-set! e id val)
   (let* ((customs (slot-ref e 'customs))
 	 (c       (assq id customs)))
@@ -186,9 +220,6 @@ otherwise the requested engine is returned."
 	(slot-set! e 'customs (cons (list id val) customs)))))
 
 
-;;;
-;;; ENGINE-ADD-WRITER!
-;;;
 (define (engine-add-writer! e ident pred upred opt before action after class valid)
   (define (check-procedure name proc arity)
     (cond
@@ -233,14 +264,27 @@ otherwise the requested engine is returned."
     (slot-set! e 'writers (cons n (slot-ref e 'writers)))
     n))
 
-;;; ======================================================================
+
+
 ;;;
-;;;				    I N I T S
+;;; Current engine.
 ;;;
-;;; ======================================================================
 
-;; A base engine must pre-exist before anything is loaded. In
-;; particular, this dummy base engine is used to load the actual
-;; definition of base.
+;;; `(skribilo module)' must be loaded before the first `find-engine' call.
+(use-modules (skribilo module))
+
+;; At this point, we're almost done with the bootstrap process.
+(format #t "base engine: ~a~%" (lookup-engine 'base))
+
+(define *current-engine*
+  ;; By default, use the HTML engine.
+  (make-parameter (lookup-engine 'html)
+		  (lambda (val)
+		    (cond ((symbol? val) (lookup-engine val))
+			  ((engine? val) val)
+			  (else
+			   (error "invalid value for `*current-engine*'"
+				  val))))))
+
 
-(make-engine 'base :version 'bootstrap)
+;;; engine.scm ends here
diff --git a/src/guile/skribilo/engine/html.scm b/src/guile/skribilo/engine/html.scm
index 6e0dc85..01708c8 100644
--- a/src/guile/skribilo/engine/html.scm
+++ b/src/guile/skribilo/engine/html.scm
@@ -17,12 +17,15 @@
 ;*=====================================================================*/
 
 (define-skribe-module (skribilo engine html)
-  #:use-module ((srfi srfi-19) :renamer (symbol-prefix-proc 's19:)))
+  :use-module ((srfi srfi-19) :renamer (symbol-prefix-proc 's19:)))
 
 
 ;; Keep a reference to the base engine.
 (define base-engine (find-engine 'base))
 
+(if (not (engine? base-engine))
+    (error "bootstrap problem: base engine broken" base-engine))
+
 ;*---------------------------------------------------------------------*/
 ;*    html-file-default ...                                            */
 ;*---------------------------------------------------------------------*/
diff --git a/src/guile/skribilo/engine/lout.scm b/src/guile/skribilo/engine/lout.scm
index 36df9f9..64a3c5d 100644
--- a/src/guile/skribilo/engine/lout.scm
+++ b/src/guile/skribilo/engine/lout.scm
@@ -515,184 +515,183 @@
 ;*    lout-engine ...                                                 */
 ;*---------------------------------------------------------------------*/
 (define lout-engine
-   (default-engine-set!
-      (make-engine 'lout
-		   :version 0.2
-		   :format "lout"
-		   :delegate (find-engine 'base)
-		   :filter (make-string-replace lout-encoding)
-		   :custom `(;; The underlying Lout document type, i.e. one
-			     ;; of `doc', `report', `book' or `slides'.
-			     (document-type report)
-
-			     ;; Document style file include line (a string
-			     ;; such as `@Include { doc-style.lout }') or
-			     ;; `auto' (symbol) in which case the include
-			     ;; file is deduced from `document-type'.
-			     (document-include auto)
-
-			     (includes "@SysInclude { tbl }\n")
-			     (initial-font "Palatino Base 10p")
-			     (initial-break
-			      ,(string-append "unbreakablefirst "
-					      "unbreakablelast "
-					      "hyphen adjust 1.2fx"))
-
-			     ;; The document's language, used for hyphenation
-			     ;; and other things.
-			     (initial-language "English")
-
-			     ;; Number of columns.
-			     (column-number 1)
-
-			     ;; First page number.
-			     (first-page-number 1)
-
-			     ;; Page orientation, `portrait', `landscape',
-			     ;; `reverse-portrait' or `reverse-landscape'.
-			     (page-orientation portrait)
-
-			     ;; For reports, whether to produce a cover
-			     ;; sheet.  The `doc-cover-sheet-proc' custom may
-			     ;; also honor this custom for `doc' documents.
-			     (cover-sheet? #t)
-
-			     ;; For reports, the date line.
-			     (date-line #t)
-
-			     ;; For reports, an abstract.
-			     (abstract #f)
-
-			     ;; For reports, title/name of the abstract.  If
-			     ;; `#f', the no abstract title will be
-			     ;; produced.  If `#t', a default name in the
-			     ;; current language is chosen.
-			     (abstract-title #t)
-
-			     ;; Whether to optimize pages.
-			     (optimize-pages? #f)
-
-			     ;; For docs, the procedure that produces the
-			     ;; Lout code for the cover sheet or title.
-			     (doc-cover-sheet-proc
-			      ,lout-make-doc-cover-sheet)
-
-			     ;; Procedure used to sort bibliography
-			     ;; references when several are referred to at
-			     ;; the same time, as in:
-			     ;;  (ref :bib '("smith03" "jones98")) .
-			     ;; By default they are sorted by number.  If
-			     ;; `#f' is given, they are left as is.
-			     (bib-refs-sort-proc
-			      ,lout-bib-refs-sort/number)
-
-			     ;; Lout code for paragraph gaps (similar to
-			     ;; `@PP' with `@ParaGap' equal to `1.0vx' by
-			     ;; default)
-			     (paragraph-gap
-			      "\n//1.0vx @ParaIndent @Wide &{0i}\n")
-
-			     ;; For multi-page tables, it may be
-			     ;; useful to set this to `#t'.  However,
-			     ;; this looks kind of buggy.
-			     (use-header-rows? #f)
-
-			     ;; Tells whether to use Skribe's footnote
-			     ;; numbers or Lout's numbering scheme (the
-			     ;; latter may be better, typography-wise).
-			     (use-skribe-footnote-numbers? #t)
-
-			     ;; A procedure that is passed the engine
-			     ;; and produces Lout definitions.
-			     (inline-definitions-proc ,lout-definitions)
-
-			     ;; A procedure that takes a URL `ref' markup and
-			     ;; returns a list containing (maybe) one such
-			     ;; `ref' markup.  This custom can be used to
-			     ;; modified the way URLs are rendered.  The
-			     ;; default value is a procedure that limits the
-			     ;; size of Lout's @ExternalLink symbols since
-			     ;; they are unbreakable.  In order to completely
-			     ;; disable use of @ExternalLinks, just set it to
-			     ;; `markup-body'.
-			     (transform-url-ref-proc
-			      ,lout-split-external-link)
-
-			     ;; Leader used in the table of contents entries.
-			     (toc-leader ".")
-
-			     ;; Inter-leader spacing in the TOC entries.
-			     (toc-leader-space "2.5s")
-
-			     ;; Procedure that takes a large-scale structure
-			     ;; (chapter, section, etc.) and the engine and
-			     ;; produces the number and possibly title of
-			     ;; this structure for use the TOC.
-			     (toc-entry-proc ,lout-make-toc-entry)
-
-			     ;; The Lout program name, only useful when using
-			     ;; `lout-illustration' on other back-ends.
-			     (lout-program-name "lout")
-
-			     ;; Title and author information in the PDF
-			     ;; document information.  If `#t', the
-			     ;; document's `:title' and `:author' are used.
-			     (pdf-title #t)
-			     (pdf-author #t)
-
-			     ;; Keywords (a list of string) in the PDF
-			     ;; document information.
-			     (pdf-keywords #f)
-
-			     ;; Extra PDF information, an alist of key-value
-			     ;; pairs (string pairs).
-			     (pdf-extra-info (("SkribeVersion"
-					       ,(skribe-release))))
-
-			     ;; Tells whether to produce PDF "docinfo"
-			     ;; (meta-information with title, author,
-			     ;; keywords, etc.).
-			     (make-pdf-docinfo? #t)
-
-			     ;; Tells whether a PDF outline
-			     ;; (aka. "bookmarks") should be produced.
-			     (make-pdf-outline? #t)
-
-			     ;; Procedure that takes a node and an engine and
-			     ;; return a string representing the title of
-			     ;; that node's PDF bookmark.
-			     (pdf-bookmark-title-proc ,lout-pdf-bookmark-title)
-
-			     ;; Procedure that takes a node and an engine and
-			     ;; returns true if that node should have a PDF
-			     ;; outline entry.
-			     (pdf-bookmark-node-pred ,lout-pdf-bookmark-node?)
-
-			     ;; Procedure that takes a node and an engine and
-			     ;; returns true if the bookmark for that node
-			     ;; should be closed ("folded") when the user
-			     ;; opens the PDF document.
-			     (pdf-bookmark-closed-pred
-			      ,(lambda (n e)
-				 (not (is-markup? n 'chapter))))
-
-			     ;; color
-			     (color? #t)
-
-			     ;; source fontification
-			     (source-color #t)
-			     (source-comment-color "#ffa600")
-			     (source-define-color "#6959cf")
-			     (source-module-color "#1919af")
-			     (source-markup-color "#1919af")
-			     (source-thread-color "#ad4386")
-			     (source-string-color "red")
-			     (source-bracket-color "red")
-			     (source-type-color "#00cf00"))
-
-		   :symbol-table (lout-symbol-table
-				  (lambda (m)
-				     (format #f "@Eq { ~a }\n" m))))))
+  (make-engine 'lout
+	       :version 0.2
+	       :format "lout"
+	       :delegate (find-engine 'base)
+	       :filter (make-string-replace lout-encoding)
+	       :custom `(;; The underlying Lout document type, i.e. one
+			 ;; of `doc', `report', `book' or `slides'.
+			 (document-type report)
+
+			 ;; Document style file include line (a string
+			 ;; such as `@Include { doc-style.lout }') or
+			 ;; `auto' (symbol) in which case the include
+			 ;; file is deduced from `document-type'.
+			 (document-include auto)
+
+			 (includes "@SysInclude { tbl }\n")
+			 (initial-font "Palatino Base 10p")
+			 (initial-break
+			  ,(string-append "unbreakablefirst "
+					  "unbreakablelast "
+					  "hyphen adjust 1.2fx"))
+
+			 ;; The document's language, used for hyphenation
+			 ;; and other things.
+			 (initial-language "English")
+
+			 ;; Number of columns.
+			 (column-number 1)
+
+			 ;; First page number.
+			 (first-page-number 1)
+
+			 ;; Page orientation, `portrait', `landscape',
+			 ;; `reverse-portrait' or `reverse-landscape'.
+			 (page-orientation portrait)
+
+			 ;; For reports, whether to produce a cover
+			 ;; sheet.  The `doc-cover-sheet-proc' custom may
+			 ;; also honor this custom for `doc' documents.
+			 (cover-sheet? #t)
+
+			 ;; For reports, the date line.
+			 (date-line #t)
+
+			 ;; For reports, an abstract.
+			 (abstract #f)
+
+			 ;; For reports, title/name of the abstract.  If
+			 ;; `#f', the no abstract title will be
+			 ;; produced.  If `#t', a default name in the
+			 ;; current language is chosen.
+			 (abstract-title #t)
+
+			 ;; Whether to optimize pages.
+			 (optimize-pages? #f)
+
+			 ;; For docs, the procedure that produces the
+			 ;; Lout code for the cover sheet or title.
+			 (doc-cover-sheet-proc
+			  ,lout-make-doc-cover-sheet)
+
+			 ;; Procedure used to sort bibliography
+			 ;; references when several are referred to at
+			 ;; the same time, as in:
+			 ;;  (ref :bib '("smith03" "jones98")) .
+			 ;; By default they are sorted by number.  If
+			 ;; `#f' is given, they are left as is.
+			 (bib-refs-sort-proc
+			  ,lout-bib-refs-sort/number)
+
+			 ;; Lout code for paragraph gaps (similar to
+			 ;; `@PP' with `@ParaGap' equal to `1.0vx' by
+			 ;; default)
+			 (paragraph-gap
+			  "\n//1.0vx @ParaIndent @Wide &{0i}\n")
+
+			 ;; For multi-page tables, it may be
+			 ;; useful to set this to `#t'.  However,
+			 ;; this looks kind of buggy.
+			 (use-header-rows? #f)
+
+			 ;; Tells whether to use Skribe's footnote
+			 ;; numbers or Lout's numbering scheme (the
+			 ;; latter may be better, typography-wise).
+			 (use-skribe-footnote-numbers? #t)
+
+			 ;; A procedure that is passed the engine
+			 ;; and produces Lout definitions.
+			 (inline-definitions-proc ,lout-definitions)
+
+			 ;; A procedure that takes a URL `ref' markup and
+			 ;; returns a list containing (maybe) one such
+			 ;; `ref' markup.  This custom can be used to
+			 ;; modified the way URLs are rendered.  The
+			 ;; default value is a procedure that limits the
+			 ;; size of Lout's @ExternalLink symbols since
+			 ;; they are unbreakable.  In order to completely
+			 ;; disable use of @ExternalLinks, just set it to
+			 ;; `markup-body'.
+			 (transform-url-ref-proc
+			  ,lout-split-external-link)
+
+			 ;; Leader used in the table of contents entries.
+			 (toc-leader ".")
+
+			 ;; Inter-leader spacing in the TOC entries.
+			 (toc-leader-space "2.5s")
+
+			 ;; Procedure that takes a large-scale structure
+			 ;; (chapter, section, etc.) and the engine and
+			 ;; produces the number and possibly title of
+			 ;; this structure for use the TOC.
+			 (toc-entry-proc ,lout-make-toc-entry)
+
+			 ;; The Lout program name, only useful when using
+			 ;; `lout-illustration' on other back-ends.
+			 (lout-program-name "lout")
+
+			 ;; Title and author information in the PDF
+			 ;; document information.  If `#t', the
+			 ;; document's `:title' and `:author' are used.
+			 (pdf-title #t)
+			 (pdf-author #t)
+
+			 ;; Keywords (a list of string) in the PDF
+			 ;; document information.
+			 (pdf-keywords #f)
+
+			 ;; Extra PDF information, an alist of key-value
+			 ;; pairs (string pairs).
+			 (pdf-extra-info (("SkribeVersion"
+					   ,(skribe-release))))
+
+			 ;; Tells whether to produce PDF "docinfo"
+			 ;; (meta-information with title, author,
+			 ;; keywords, etc.).
+			 (make-pdf-docinfo? #t)
+
+			 ;; Tells whether a PDF outline
+			 ;; (aka. "bookmarks") should be produced.
+			 (make-pdf-outline? #t)
+
+			 ;; Procedure that takes a node and an engine and
+			 ;; return a string representing the title of
+			 ;; that node's PDF bookmark.
+			 (pdf-bookmark-title-proc ,lout-pdf-bookmark-title)
+
+			 ;; Procedure that takes a node and an engine and
+			 ;; returns true if that node should have a PDF
+			 ;; outline entry.
+			 (pdf-bookmark-node-pred ,lout-pdf-bookmark-node?)
+
+			 ;; Procedure that takes a node and an engine and
+			 ;; returns true if the bookmark for that node
+			 ;; should be closed ("folded") when the user
+			 ;; opens the PDF document.
+			 (pdf-bookmark-closed-pred
+			  ,(lambda (n e)
+			     (not (is-markup? n 'chapter))))
+
+			 ;; color
+			 (color? #t)
+
+			 ;; source fontification
+			 (source-color #t)
+			 (source-comment-color "#ffa600")
+			 (source-define-color "#6959cf")
+			 (source-module-color "#1919af")
+			 (source-markup-color "#1919af")
+			 (source-thread-color "#ad4386")
+			 (source-string-color "red")
+			 (source-bracket-color "red")
+			 (source-type-color "#00cf00"))
+
+	       :symbol-table (lout-symbol-table
+			      (lambda (m)
+				(format #f "@Eq { ~a }\n" m)))))
 
 
 
diff --git a/src/guile/skribilo/evaluator.scm b/src/guile/skribilo/evaluator.scm
index def3280..bbf92e3 100644
--- a/src/guile/skribilo/evaluator.scm
+++ b/src/guile/skribilo/evaluator.scm
@@ -1,7 +1,6 @@
+;;; eval.scm  --  Skribilo evaluator.
 ;;;
-;;; eval.stk		-- Skribe Evaluator
-;;;
-;;; Copyright © 2003-2004 Erick Gallesio - I3S-CNRS/ESSI <eg@essi.fr>
+;;; Copyright 2003-2004  Erick Gallesio - I3S-CNRS/ESSI <eg@essi.fr>
 ;;; Copyright 2005  Ludovic Courtès  <ludovic.courtes@laas.fr>
 ;;;
 ;;;
@@ -19,26 +18,24 @@
 ;;; along with this program; if not, write to the Free Software
 ;;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
 ;;; USA.
-;;;
-
-
-
-;; FIXME; On peut implémenter maintenant skribe-warning/node
 
 
 (define-module (skribilo evaluator)
   :export (skribe-eval skribe-eval-port skribe-load skribe-load-options
-	   skribe-include))
+	   skribe-include)
+  :autoload (skribilo parameters) (*verbose*)
+  :autoload (skribilo location)   (<location>)
+  :autoload (skribilo ast)        (ast? markup?)
+  :autoload (skribilo engine)     (engine? find-engine engine-ident)
+  :autoload (skribilo reader)     (%default-reader)
+
+  :autoload (skribilo verify)     (verify)
+  :autoload (skribilo resolve)    (resolve!))
+
 
 (use-modules (skribilo debug)
-	     (skribilo reader)
-	     (skribilo engine)
-	     (skribilo verify)
-	     (skribilo resolve)
 	     (skribilo output)
-             (skribilo types)
              (skribilo lib)
-	     (skribilo vars)
 
 	     (ice-9 optargs)
 	     (oop goops)
@@ -94,8 +91,10 @@
 
      (let ((e (if (symbol? engine) (find-engine engine) engine)))
        (debug-item "e=" e)
-       (if (not (is-a? e <engine>))
-	   (skribe-error 'skribe-eval-port "cannot find engine" engine)
+       (if (not (engine? e))
+	   (begin
+	     (format #t "engine: ~a~%" e)
+	     (skribe-error 'skribe-eval-port "cannot find engine" engine))
 	   (let loop ((exp (reader port)))
 	     (with-debug 10 'skribe-eval-port
 		(debug-item "exp=" exp))
@@ -106,6 +105,8 @@
 ;;;
 ;;; SKRIBE-LOAD
 ;;;
+
+;;; FIXME: Use a fluid for that.
 (define *skribe-load-options* '())
 
 (define (skribe-load-options)
@@ -117,13 +118,7 @@
      (debug-item "  path=" path)
      (debug-item "  opt=" opt)
 
-     (let* ((ei  (cond
-		  ((not engine) *skribe-engine*)
-		  ((engine? engine) engine)
-		  ((not (symbol? engine))
-                   (skribe-error 'skribe-load
-                                 "illegal engine" engine))
-		  (else engine)))
+     (let* ((ei  (*current-engine*))
 	    (path (append (cond
 			   ((not path) (skribe-path))
 			   ((string? path) (list path))
@@ -151,9 +146,9 @@
        ;; Load this file if not already done
        (unless (member filep *skribe-loaded*)
 	 (cond
-	   ((> *skribe-verbose* 1)
+	   ((> (*verbose*) 1)
 	    (format (current-error-port) "  [loading file: ~S ~S]\n" filep opt))
-	   ((> *skribe-verbose* 0)
+	   ((> (*verbose*) 0)
 	    (format (current-error-port) "  [loading file: ~S]\n" filep)))
 	 ;; Load it
 	 (with-input-from-file filep
@@ -173,7 +168,7 @@
       (skribe-error 'skribe-load
 		    (format #t "cannot find ~S in path" file)
 		    path))
-    (when (> *skribe-verbose* 0)
+    (when (> (*verbose*) 0)
       (format (current-error-port) "  [including file: ~S]\n" path))
 
     (with-input-from-file path
diff --git a/src/guile/skribilo/lib.scm b/src/guile/skribilo/lib.scm
index 2961fc6..b15960e 100644
--- a/src/guile/skribilo/lib.scm
+++ b/src/guile/skribilo/lib.scm
@@ -2,6 +2,7 @@
 ;;; lib.scm	-- Utilities
 ;;;
 ;;; Copyright © 2003-2004 Erick Gallesio - I3S-CNRS/ESSI <eg@unice.fr>
+;;; Copyright © 2005 Ludovic Courtès <ludovic.courtes@laas.fr>
 ;;;
 ;;;
 ;;; This program is free software; you can redistribute it and/or modify
@@ -26,37 +27,9 @@
            skribe-type-error
            skribe-warning skribe-warning/ast
            skribe-message
-
-           ;; paths as lists of directories
-
-           %skribilo-load-path
-           %skribilo-image-path %skribilo-bib-path %skribilo-source-path
-
-           ;; compatibility
-
-           skribe-path skribe-path-set!
-           skribe-image-path skribe-image-path-set!
-           skribe-bib-path skribe-bib-path-set!
-           skribe-source-path skribe-source-path-set!
-
-           ;; various utilities for compatiblity
-
-           substring=?
-           file-suffix file-prefix prefix suffix
-           directory->list find-file/path
-           printf fprintf
-           any? every?
-           process-input-port process-output-port process-error-port
-	   %procedure-arity
-
-           make-hashtable hashtable?
-           hashtable-get hashtable-put! hashtable-update!
-           hashtable->list
-
 	   skribe-read
-           find-runtime-type
 
-	   date)
+	   %procedure-arity)
 
   :export-syntax (new define-markup define-simple-markup
                   define-simple-container define-processor-markup
@@ -65,12 +38,16 @@
                   unwind-protect unless when)
 
   :use-module (skribilo config)
-  :use-module (skribilo types)
+  :use-module (skribilo ast)
+
+  ;; useful for `new' to work well with <language>
+  :autoload   (skribilo source)   (<language>)
+
   :use-module (skribilo reader)
-  :use-module (skribilo vars)
+  :use-module (skribilo parameters)
+  :use-module (skribilo location)
 
   :use-module (srfi srfi-1)
-  :use-module ((srfi srfi-19) :renamer (symbol-prefix-proc 's19:)) ;; date
   :use-module (oop goops)
   :use-module (ice-9 optargs))
 
@@ -81,11 +58,11 @@
 ;;; NEW
 ;;;
 
-(define %types-module (resolve-module '(skribilo types)))
+(define %types-module (current-module))
 
 (define-macro (new class . parameters)
   ;; Thanks to the trick below, modules don't need to import `(oop goops)'
-  ;; and `(skribilo types)' in order to make use of `new'.
+  ;; and `(skribilo ast)' in order to make use of `new'.
   (let* ((class-name (symbol-append '< class '>))
 	 (actual-class (module-ref %types-module class-name)))
     `(let ((make ,make)
@@ -221,12 +198,12 @@
 
 
 (define (skribe-warning level . obj)
-  (if (>= *skribe-warning* level)
+  (if (>= (*warning*) level)
       (%skribe-warn level #f #f obj)))
 
 
 (define (skribe-warning/ast level ast . obj)
-  (if (>= *skribe-warning* level)
+  (if (>= (*warning*) level)
       (let ((l (ast-loc ast)))
 	(if (location? l)
 	    (%skribe-warn level (location-file l) (location-line l) obj)
@@ -236,27 +213,9 @@
 ;;; SKRIBE-MESSAGE
 ;;;
 (define (skribe-message fmt . obj)
-  (when (> *skribe-verbose* 0)
+  (when (> (*verbose*) 0)
     (apply format (current-error-port) fmt obj)))
 
-;;;
-;;; FILE-PREFIX / FILE-SUFFIX
-;;;
-(define (file-prefix fn)
-  (if fn
-      (let ((match (regexp-match "(.*)\\.([^/]*$)" fn)))
-	(if match
-	    (cadr match)
-	    fn))
-      "./SKRIBE-OUTPUT"))
-
-(define (file-suffix s)
-  ;; Not completely correct, but sufficient here
-  (let* ((basename (regexp-replace "^(.*)/(.*)$" s "\\2"))
-	 (split    (string-split basename ".")))
-    (if (> (length split) 1)
-	(car (reverse! split))
-	"")))
 
 
 ;;;
@@ -289,87 +248,6 @@
        (else
 	(Loop (cdr l))))))
 
-
-
-;;; ======================================================================
-;;;
-;;;				A C C E S S O R S
-;;;
-;;; ======================================================================
-
-
-(define %skribilo-load-path (list (skribilo-default-path) "."))
-(define %skribilo-image-path '("."))
-(define %skribilo-bib-path '("."))
-(define %skribilo-source-path '("."))
-
-(define-macro (define-compatibility-accessors var oldname)
-  (let ((newname (symbol-append '%skribilo- var))
-        (setter  (symbol-append oldname '-set!)))
-    `(begin
-       (define (,oldname) ,newname)
-       (define (,setter path)
-         (if (not (and (list? path) (every string? path)))
-             (skribe-error ',setter "illegal path" path)
-             (set! ,newname path))))))
-
-(define-compatibility-accessors load-path   skribe-path)
-(define-compatibility-accessors image-path  skribe-image-path)
-(define-compatibility-accessors bib-path    skribe-bib-path)
-(define-compatibility-accessors source-path skribe-source-path)
-
-
-
-;;; ======================================================================
-;;;
-;;;				Compatibility with Bigloo
-;;;
-;;; ======================================================================
-
-(define (substring=? s1 s2 len)
-  (let ((l1 (string-length s1))
-	(l2 (string-length s2)))
-    (let Loop ((i 0))
-      (cond
-	((= i len) #t)
-	((= i l1)  #f)
-	((= i l2)  #f)
-	((char=? (string-ref s1 i) (string-ref s2 i)) (Loop (+ i 1)))
-	(else #f)))))
-
-(define (directory->list str)
-  (map basename (glob (string-append str "/*") (string-append "/.*"))))
-
-(define-macro (printf . args)   `(format #t ,@args))
-(define fprintf			format)
-
-
-(define prefix			file-prefix)
-(define suffix			file-suffix)
-(define system->string		system)  ;; FIXME
-(define any?			any)
-(define every?			every)
-(define find-file/path		(lambda (. args)
-				  (format #t "find-file/path: ~a~%" args)
-				  #f))
-(define process-input-port	#f) ;process-input)
-(define process-output-port	#f) ;process-output)
-(define process-error-port	#f) ;process-error)
-
-
-;;;
-;;; h a s h   t a b l e s
-;;;
-(define make-hashtable		make-hash-table)
-(define hashtable?		hash-table?)
-(define hashtable-get		(lambda (h k) (hash-ref h k #f)))
-(define hashtable-put!		hash-set!)
-(define hashtable-update!	hash-set!)
-(define hashtable->list	(lambda (h)
-                          (map cdr (hash-map->list cons h))))
-
-(define find-runtime-type	(lambda (obj) obj))
-
 
 ;;;
 ;;; Various things.
@@ -396,8 +274,5 @@
 (define-macro (when condition . exprs)
   `(if ,condition (begin ,@exprs)))
 
-(define (date)
-  (s19:date->string (s19:current-date) "~c"))
-
 
 ;;; lib.scm ends here
diff --git a/src/guile/skribilo/location.scm b/src/guile/skribilo/location.scm
new file mode 100644
index 0000000..a134f8a
--- /dev/null
+++ b/src/guile/skribilo/location.scm
@@ -0,0 +1,68 @@
+;;; location.scm -- Skribilo source location.
+;;;
+;;; Copyright 2003-2004  Erick Gallesio - I3S-CNRS/ESSI <eg@unice.fr>
+;;; Copyright 2005  Ludovic Courtès <ludovic.courtes@laas.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.
+
+(define-module (skribilo location)
+  :use-module (oop goops)
+  :export (<location> location? ast-location
+	   location-file location-line location-pos))
+
+;;; Author:  Ludovic Courtès
+;;;
+;;; Commentary:
+;;;
+;;; An abstract data type to keep track of source locations.
+;;;
+;;; Code:
+
+(read-set! keywords 'prefix)
+
+
+;;;
+;;; Class definition.
+;;;
+
+(define-class <location> ()
+  (file :init-keyword :file :getter location-file)
+  (pos  :init-keyword :pos  :getter location-pos)
+  (line :init-keyword :line :getter location-line))
+
+(define (location? obj)
+  (is-a? obj <location>))
+
+(define (ast-location obj)
+  (let ((loc (slot-ref obj 'loc)))
+    (if (location? loc)
+	(let* ((fname (location-file loc))
+	       (line  (location-line loc))
+	       (pwd   (getcwd))
+	       (len   (string-length pwd))
+	       (lenf  (string-length fname))
+	       (file  (if (and (substring=? pwd fname len)
+			       (> lenf len))
+			  (substring fname len (+ 1 (string-length fname)))
+			  fname)))
+	  (format #f "~a, line ~a" file line))
+	"no source location")))
+
+
+;;; arch-tag: d68fa45d-a200-465e-a3c2-eb2861907f83
+
+;;; location.scm ends here.
diff --git a/src/guile/skribilo/module.scm b/src/guile/skribilo/module.scm
index bb0c5ad..21917b2 100644
--- a/src/guile/skribilo/module.scm
+++ b/src/guile/skribilo/module.scm
@@ -20,7 +20,6 @@
 
 (define-module (skribilo module)
   :use-module (skribilo reader)
-  :use-module (skribilo evaluator)
   :use-module (skribilo debug)
   :use-module (srfi srfi-1)
   :use-module (ice-9 optargs))
@@ -37,20 +36,20 @@
 ;;;
 ;;; Code:
 
-(define *skribilo-user-imports*
+(define %skribilo-user-imports
   ;; List of modules that should be imported by any good Skribilo module.
   '((srfi srfi-1)         ;; lists
     (srfi srfi-13)        ;; strings
-    ;(srfi srfi-19)        ;; date and time
     (ice-9 optargs)       ;; `define*'
     (ice-9 and-let-star)  ;; `and-let*'
     (ice-9 receive)       ;; `receive'
 
     (skribilo module)
-    (skribilo types)      ;; `<document>', `document?', etc.
+    (skribilo parameters) ;; run-time parameters
+    (skribilo compat)     ;; `skribe-load-path', etc.
+    (skribilo ast)        ;; `<document>', `document?', etc.
     (skribilo config)
-    (skribilo vars)
-    (skribilo runtime)    ;; `the-options', `the-body'
+    (skribilo runtime)    ;; `the-options', `the-body', `make-string-replace'
     (skribilo biblio)
     (skribilo lib)        ;; `define-markup', `unwind-protect', etc.
     (skribilo resolve)
@@ -78,7 +77,7 @@
      ;; Pull all the bindings that Skribe code may expect, plus those needed
      ;; to actually create and read the module.
      ,(cons 'use-modules
-	    (append *skribilo-user-imports*
+	    (append %skribilo-user-imports
 		    (filter-map (lambda (mod)
 				  (let ((m `(skribilo skribe
 						      ,(string->symbol
@@ -94,7 +93,7 @@
 
 
 
-(define *skribilo-user-module* #f)
+(define %skribilo-user-module #f)
 
 ;;;
 ;;; MAKE-RUN-TIME-MODULE
@@ -105,7 +104,7 @@ execution of Skribilo/Skribe code."
   (let ((the-module (make-module)))
         (for-each (lambda (iface)
                     (module-use! the-module (resolve-module iface)))
-                  (append *skribilo-user-imports*
+                  (append %skribilo-user-imports
 			  (map (lambda (mod)
 				 `(skribilo skribe
 					    ,(string->symbol mod)))
@@ -118,9 +117,9 @@ execution of Skribilo/Skribe code."
 ;;;
 (define-public (run-time-module)
   "Return the default instance of a Skribilo/Skribe run-time module."
-  (if (not *skribilo-user-module*)
-      (set! *skribilo-user-module* (make-run-time-module)))
-  *skribilo-user-module*)
+  (if (not %skribilo-user-module)
+      (set! %skribilo-user-module (make-run-time-module)))
+  %skribilo-user-module)
 
 
 ;; FIXME:  This will eventually be replaced by the per-module reader thing in
@@ -134,12 +133,11 @@ execution of Skribilo/Skribe code."
 ;      (format #t "load-file-with-read: ~a~%" read)
 	 (let loop ((sexp (read))
 		    (result #f))
-	   (if (eof-object? sexp)
-	       result
+	   (if (not (eof-object? sexp))
 	       (begin
 ;              (format #t "preparing to evaluate `~a'~%" sexp)
-		 (loop (read)
-		       (primitive-eval sexp)))))))))
+		 (primitive-eval sexp)
+		 (loop (read)))))))))
 
 (define-public (load-skribilo-file file reader-name)
   (load-file-with-read file (make-reader reader-name) (current-module)))
diff --git a/src/guile/skribilo/output.scm b/src/guile/skribilo/output.scm
index 8a63a48..cbd4523 100644
--- a/src/guile/skribilo/output.scm
+++ b/src/guile/skribilo/output.scm
@@ -1,7 +1,6 @@
+;;;; output.scm  --  Skribilo output stage.
 ;;;;
-;;;; output.stk	-- Skribe Output Stage
-;;;;
-;;;; Copyright © 2003-2004 Erick Gallesio - I3S-CNRS/ESSI <eg@unice.fr>
+;;;; Copyright 2003-2004  Erick Gallesio - I3S-CNRS/ESSI <eg@unice.fr>
 ;;;;
 ;;;;
 ;;;; This program is free software; you can redistribute it and/or modify
@@ -18,21 +17,15 @@
 ;;;; 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 18:42 (eg)
-;;;; Last file update:  5-Mar-2004 10:32 (eg)
-;;;;
+
 
 (define-module (skribilo output)
-   :export (output))
-
-(use-modules (skribilo debug)
-	     (skribilo types)
-;	     (skribilo engine)
-	     (skribilo writer)
-	     (skribilo lib)    ;; `when', `unless'
-	     (oop goops))
+  :export (output)
+  :use-module (skribilo ast)
+  :use-module (skribilo writer)
+  :use-module (skribilo lib)
+  :use-module (skribilo debug)
+  :use-module (oop goops))
 
 
 (define-generic out)
diff --git a/src/guile/skribilo/parameters.scm b/src/guile/skribilo/parameters.scm
new file mode 100644
index 0000000..d8b259f
--- /dev/null
+++ b/src/guile/skribilo/parameters.scm
@@ -0,0 +1,65 @@
+;;; parameters.scm  --  Skribilo settings as parameter objects.
+;;;
+;;; Copyright 2005  Ludovic Courtès <ludovic.courtes@laas.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.
+
+(define-module (skribilo parameters)
+  :use-module (srfi srfi-39))
+
+;;; Author:  Ludovic Courtès
+;;;
+;;; Commentary:
+;;;
+;;; This module defines parameter objects that may be used to specify
+;;; run-time parameters of a Skribilo process.
+;;;
+;;; Code:
+
+
+;;;
+;;; Switches.
+;;;
+
+(define-public *verbose*       (make-parameter #f))
+(define-public *warning*       (make-parameter 5))
+(define-public *load-rc-file?* (make-parameter #f))
+
+;;;
+;;; Paths.
+;;;
+
+(define-public *document-path* (make-parameter (list ".")))
+(define-public *bib-path*      (make-parameter (list ".")))
+(define-public *source-path*   (make-parameter (list ".")))
+(define-public *image-path*    (make-parameter (list ".")))
+
+;;;
+;;; Files.
+;;;
+
+(define-public *destination-file* (make-parameter "output.html"))
+(define-public *source-file*      (make-parameter "default-input-file.skb"))
+
+
+;;; TODO: Skribe used to have other parameters as global variables.  See
+;;; which ones need to be kept.
+
+
+;;; arch-tag: 3c0d2e18-b997-4615-8a3d-b6622ae28874
+
+;;; parameters.scm ends here
diff --git a/src/guile/skribilo/reader/skribe.scm b/src/guile/skribilo/reader/skribe.scm
index 714f19e..5c71cc1 100644
--- a/src/guile/skribilo/reader/skribe.scm
+++ b/src/guile/skribilo/reader/skribe.scm
@@ -37,6 +37,7 @@
 ;;;
 ;;; Code:
 
+;;; Note: We need guile-reader 0.2 at least.
 
 (define* (make-skribe-reader #:optional (version "1.2d"))
   "Return a Skribe reader (a procedure) suitable for version @var{version} of
diff --git a/src/guile/skribilo/resolve.scm b/src/guile/skribilo/resolve.scm
index a39bb77..7075f2d 100644
--- a/src/guile/skribilo/resolve.scm
+++ b/src/guile/skribilo/resolve.scm
@@ -27,7 +27,7 @@
 (define-module (skribilo resolve)
   :use-module (skribilo debug)
   :use-module (skribilo runtime)
-  :use-module (skribilo types)
+  :use-module (skribilo ast)
   :use-module (skribilo lib)  ;; `unless' and `when'
 
   :use-module (oop goops)
diff --git a/src/guile/skribilo/runtime.scm b/src/guile/skribilo/runtime.scm
index 03e515c..d4be2e9 100644
--- a/src/guile/skribilo/runtime.scm
+++ b/src/guile/skribilo/runtime.scm
@@ -1,8 +1,8 @@
 ;;;
-;;; runtime.stk	-- Skribe runtime system
+;;; runtime.scm	-- Skribilo runtime system
 ;;;
 ;;; Copyright © 2003-2004 Erick Gallesio - I3S-CNRS/ESSI <eg@unice.fr>
-;;;
+;;; Copyright © 2005 Ludovic Courtès <ludovic.courtes@laas.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
@@ -18,46 +18,22 @@
 ;;; 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 18:47 (eg)
-;;; Last file update: 15-Nov-2004 14:03 (eg)
-;;;
 
 (define-module (skribilo runtime)
   ;; FIXME:  Useful procedures are scattered between here and
   ;;         `(skribilo skribe utils)'.
   :export (;; Utilities
-	   strip-ref-base ast->file-location string-canonicalize
-
-	   ;; Markup functions
-	   markup-option markup-option-add! markup-output
+	   strip-ref-base string-canonicalize
 
-	   ;; Container functions
-	   container-env-get
 
 	   ;; Images
 	   convert-image
 
 	   ;; String writing
-	   make-string-replace
-
-	   ;; AST
-	   ast-parent ast->string
-	   markup-parent markup-document markup-chapter
-
-	   handle-body))
-
-(use-modules (skribilo debug)
-	     (skribilo types)
-	     (skribilo verify)
-	     (skribilo resolve)
-	     (skribilo output)
-	     (skribilo evaluator)
-	     (skribilo vars)
-	     (skribilo lib)
-	     (srfi srfi-13)
-	     (oop goops))
+	   make-string-replace)
+  :use-module (skribilo parameters)
+  :use-module (skribilo lib)
+  :use-module (srfi srfi-13))
 
 
 
@@ -70,13 +46,13 @@
 
 ;;FIXME:  Remonter cette fonction
 (define (strip-ref-base file)
-  (if (not (string? *skribe-ref-base*))
+  (if (not (string? (*ref-base*)))
       file
-      (let ((l (string-length *skribe-ref-base*)))
+      (let ((l (string-length (*ref-base*))))
 	(cond
 	  ((not (> (string-length file) (+ l 2)))
 	   file)
-	  ((not (substring=? file *skribe-ref-base* l))
+	  ((not (substring=? file (*ref-base*) l))
 	   file)
 	  ((not (char=? (string-ref file l) (file-separator)))
 	   file)
@@ -84,12 +60,6 @@
 	   (substring file (+ l 1) (string-length file)))))))
 
 
-(define (ast->file-location ast)
-   (let ((l (ast-loc ast)))
-     (if (location? l)
-	 (format "~a:~a:" (location-file l) (location-line l))
-	 "")))
-
 ;; FIXME: Remonter cette fonction
 (define (string-canonicalize old)
    (let* ((l (string-length old))
@@ -123,58 +93,6 @@
 	     (loop (+ r 1) (+ w 1) #f))))))
 
 
-;;; ======================================================================
-;;;
-;;;			M A R K U P S   F U N C T I O N S
-;;;
-;;; ======================================================================
-;; (define (markup-output markup
-;;		       :optional (engine    #f)
-;;		       :key	 (predicate #f)
-;;				 (options  '())
-;;				 (before    #f)
-;;				 (action    #f)
-;;				 (after     #f))
-;;   (let ((e (or engine (use-engine))))
-;;     (cond
-;;       ((not (is-a? e <engine>))
-;;           (skribe-error 'markup-writer "illegal engine" e))
-;;       ((and (not before)
-;;	    (not action)
-;;	    (not after))
-;;           (%find-markup-output e markup))
-;;       (else
-;;	  (let ((mp (if (procedure? predicate)
-;;			(lambda (n e) (and (is-markup? n markup) (predicate n e)))
-;;			(lambda (n e) (is-markup? n markup)))))
-;;	    (engine-output e markup mp options
-;;			   (or before (slot-ref e 'default-before))
-;;			   (or action (slot-ref e 'default-action))
-;;			   (or after  (slot-ref e 'default-after))))))))
-
-(define (markup-option m opt)
-  (if (markup? m)
-      (let ((c (assq opt (slot-ref m 'options))))
-	(and (pair? c) (pair? (cdr c))
-	     (cadr c)))
-      (skribe-type-error 'markup-option "Illegal markup: " m "markup")))
-
-
-(define (markup-option-add! m opt val)
-  (if (markup? m)
-      (slot-set! m 'options (cons (list opt val)
-				  (slot-ref m 'options)))
-      (skribe-type-error 'markup-option "Illegal markup: " m "markup")))
-
-;;; ======================================================================
-;;;
-;;;				C O N T A I N E R S
-;;;
-;;; ======================================================================
-(define (container-env-get m key)
-  (let ((c (assq key (slot-ref m 'env))))
-    (and (pair? c) (cadr c))))
-
 
 ;;; ======================================================================
 ;;;
@@ -195,9 +113,9 @@
 		    (string-append "fig2dev -L " fmt " " from " > " to)
 		    (string-append "convert " from " " to))))
 	 (cond
-	   ((> *skribe-verbose* 1)
+	   ((> (*verbose*) 1)
 	    (format (current-error-port) "  [converting image: ~S (~S)]" from c))
-	   ((> *skribe-verbose* 0)
+	   ((> (*verbose*) 0)
 	    (format (current-error-port) "  [converting image: ~S]" from)))
 	 (and (zero? (system c))
 	      to))))))
@@ -210,8 +128,8 @@
 		      (skribe-image-path))
 	(let ((suf (suffix file)))
 	  (if (member suf formats)
-	      (let* ((dir (if (string? *skribe-dest*)
-			      (dirname *skribe-dest*)
+	      (let* ((dir (if (string? (*destination-file*))
+			      (dirname (*destination-file*))
 			      #f)))
 		(if dir
 		    (let ((dest (basename path)))
@@ -221,8 +139,8 @@
 	      (let loop ((fmts formats))
 		(if (null? fmts)
 		    #f
-		     (let* ((dir (if (string? *skribe-dest*)
-				     (dirname *skribe-dest*)
+		     (let* ((dir (if (string? (*destination-file*))
+				     (dirname (*destination-file*))
 				     "."))
 			    (p (builtin-convert-image path (car fmts) dir)))
 		       (if (string? p)
@@ -282,123 +200,3 @@
 
 
 
-
-;;; ======================================================================
-;;;
-;;;				O P T I O N S
-;;;
-;;; ======================================================================
-
-;;NEW ;;
-;;NEW ;; GET-OPTION
-;;NEW ;;
-;;NEW (define (get-option obj key)
-;;NEW   ;; This function either searches inside an a-list or a markup.
-;;NEW   (cond
-;;NEW     ((pair? obj)   (let ((c (assq key obj)))
-;;NEW		     (and (pair? c) (pair? (cdr c)) (cadr c))))
-;;NEW     ((markup? obj) (get-option (slot-ref obj 'option*) key))
-;;NEW     (else          #f)))
-;;NEW
-;;NEW ;;
-;;NEW ;; BIND-OPTION!
-;;NEW ;;
-;;NEW (define (bind-option! obj key value)
-;;NEW   (slot-set! obj 'option* (cons (list key value)
-;;NEW				(slot-ref obj 'option*))))
-;;NEW
-;;NEW
-;;NEW ;;
-;;NEW ;; GET-ENV
-;;NEW ;;
-;;NEW (define (get-env obj key)
-;;NEW   ;;  This function either searches inside an a-list or a container
-;;NEW   (cond
-;;NEW     ((pair? obj)	(let ((c (assq key obj)))
-;;NEW			  (and (pair? c) (cadr c))))
-;;NEW     ((container? obj)   (get-env (slot-ref obj 'env) key))
-;;NEW     (else		#f)))
-;;NEW
-
-
-
-
-;;; ======================================================================
-;;;
-;;;				    A S T
-;;;
-;;; ======================================================================
-
-(define-generic ast->string)
-
-
-(define-method (ast->string (ast <top>))     "")
-(define-method (ast->string (ast <string>))  ast)
-(define-method (ast->string (ast <number>))  (number->string ast))
-
-(define-method (ast->string (ast <pair>))
-  (let ((out (open-output-string)))
-    (let Loop ((lst ast))
-      (cond
-	((null? lst)
-	   (get-output-string out))
-	(else
-	   (display (ast->string (car lst)) out)
-	   (unless (null? (cdr lst))
-	     (display #\space out))
-	   (Loop (cdr lst)))))))
-
-(define-method (ast->string (ast <node>))
-  (ast->string (slot-ref ast 'body)))
-
-
-
-;;
-;; AST-PARENT
-;;
-(define (ast-parent n)
-  (slot-ref n 'parent))
-
-;;
-;; MARKUP-PARENT
-;;
-(define (markup-parent m)
-  (let ((p (slot-ref m 'parent)))
-    (if (eq? p 'unspecified)
-	(skribe-error 'markup-parent "Unresolved parent reference" m)
-	p)))
-
-
-;;
-;; MARKUP-DOCUMENT
-;;
-(define (markup-document m)
-  (let Loop ((p m)
-	     (l #f))
-    (cond
-      ((is-markup? p 'document)           p)
-      ((or (eq? p 'unspecified) (not p))  l)
-      (else			          (Loop (slot-ref p 'parent) p)))))
-
-;;
-;;
-;; MARKUP-CHAPTER
-;;
-(define (markup-chapter m)
-  (let loop ((p m)
-	     (l #f))
-    (cond
-      ((is-markup? p 'chapter)           p)
-      ((or (eq? p 'unspecified) (not p)) l)
-      (else				 (loop (slot-ref p 'parent) p)))))
-
-
-
-;;;; ======================================================================
-;;;;
-;;;;				H A N D L E S
-;;;;
-;;;; ======================================================================
-(define (handle-body h)
-  (slot-ref h 'body))
-
diff --git a/src/guile/skribilo/source.scm b/src/guile/skribilo/source.scm
index e03deae..bd523f2 100644
--- a/src/guile/skribilo/source.scm
+++ b/src/guile/skribilo/source.scm
@@ -1,4 +1,3 @@
-;;;;
 ;;;; source.scm	-- Highlighting source files.
 ;;;;
 ;;;; Copyright © 2003-2004 Erick Gallesio - I3S-CNRS/ESSI <eg@essi.fr>
@@ -22,16 +21,33 @@
 ;;;;
 
 
-
 (define-module (skribilo source)
-  :export (source-read-lines source-read-definition source-fontify)
-  :use-module (skribilo types)
-  :use-module (skribilo vars)
+  :export (<language> language? language-extractor language-fontifier
+	   source-read-lines source-read-definition source-fontify)
+  :use-module (skribilo parameters)
   :use-module (skribilo lib)
+  :use-module (oop goops)
   :use-module (ice-9 rdelim))
 
+(read-set! keywords 'prefix)
+
+
+;;;
+;;; Class definition.
+;;;
+
+(define-class <language> ()
+  (name	:init-keyword :name	 :init-value #f :getter langage-name)
+  (fontifier	:init-keyword :fontifier :init-value #f
+		:getter language-fontifier)
+  (extractor	:init-keyword :extractor :init-value #f
+		:getter language-extractor))
+
+(define (language? obj)
+  (is-a? obj <language>))
 
 
+
 ;*---------------------------------------------------------------------*/
 ;*    source-read-lines ...                                            */
 ;*---------------------------------------------------------------------*/
@@ -43,7 +59,7 @@
 			(skribe-source-path))
 	  (with-input-from-file p
 	     (lambda ()
-		(if (> *skribe-verbose* 0)
+		(if (> (*verbose*) 0)
 		    (format (current-error-port) "  [source file: ~S]\n" p))
 		(let ((startl (if (string? start) (string-length start) -1))
 		      (stopl  (if (string? stop)  (string-length stop)  -1)))
@@ -125,7 +141,7 @@
 			(skribe-source-path)))
 	 (else
 	  (let ((ip (open-input-file p)))
-	     (if (> *skribe-verbose* 0)
+	     (if (> (*verbose*) 0)
 		 (format (current-error-port) "  [source file: ~S]\n" p))
 	     (if (not (input-port? ip))
 		 (skribe-error 'source "Can't open file for input" p)
diff --git a/src/guile/skribilo/vars.scm b/src/guile/skribilo/vars.scm
deleted file mode 100644
index 4877e78..0000000
--- a/src/guile/skribilo/vars.scm
+++ /dev/null
@@ -1,66 +0,0 @@
-;;;
-;;; vars.scm	-- Skribe Globals
-;;;
-;;; Copyright © 2003-2004 Erick Gallesio - I3S-CNRS/ESSI <eg@unice.fr>
-;;; Copyright 2005  Ludovic Courtès  <ludovic.courtes@laas.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.
-
-
-(define-module (skribilo vars))
-
-;;;
-;;; Switches
-;;;
-(define-public *skribe-verbose*	0)
-(define-public *skribe-warning*	5)
-(define-public *load-rc*		#t)
-
-
-;;;
-;;; PATH variables
-;;;
-(define-public *skribe-path*		#f)
-(define-public *skribe-bib-path*	'("."))
-(define-public *skribe-source-path*	'("."))
-(define-public *skribe-image-path*	'("."))
-
-
-(define-public *skribe-rc-directory*
-  (string-append (getenv "HOME") "/" ".skribilo"))
-
-
-;;;
-;;; In and out ports
-;;;
-(define-public *skribe-src*		'())
-(define-public *skribe-dest*		#f)
-
-;;;
-;;; Engine
-;;;
-(define-public *skribe-engine*	'html)	;; Use HTML by default
-
-;;;
-;;; Misc
-;;;
-(define-public *skribe-chapter-split*	'())
-(define-public *skribe-ref-base*	#f)
-(define-public *skribe-convert-image*  #f)	;; i.e. use the Skribe standard converter
-(define-public *skribe-variants*	'())
-
-
diff --git a/src/guile/skribilo/verify.scm b/src/guile/skribilo/verify.scm
index 0f9e053..aa2dd78 100644
--- a/src/guile/skribilo/verify.scm
+++ b/src/guile/skribilo/verify.scm
@@ -31,7 +31,7 @@
 	     (skribilo engine)
 	     (skribilo writer)
 	     (skribilo runtime)
-	     (skribilo types)
+	     (skribilo ast)
 	     (skribilo lib)     ;; `when', `unless'
 	     (oop goops))
 
diff --git a/src/guile/skribilo/writer.scm b/src/guile/skribilo/writer.scm
index abfb10c..b393c5c 100644
--- a/src/guile/skribilo/writer.scm
+++ b/src/guile/skribilo/writer.scm
@@ -26,25 +26,57 @@
 
 
 (define-module (skribilo writer)
-  :export (invoke markup-writer markup-writer-get markup-writer-get*
-	   lookup-markup-writer copy-markup-writer))
+  :export (<writer> writer? write-object writer-options writer-ident
+	            writer-before writer-action writer-after writer-class
+
+	   invoke markup-writer markup-writer-get markup-writer-get*
+	   lookup-markup-writer copy-markup-writer)
+
+  :autoload (skribilo engine) (engine? engine-ident? default-engine))
 
 
 (use-modules (skribilo debug)
-	     (skribilo engine)
 	     (skribilo output)
-	     (skribilo types)
+	     (skribilo ast)
 	     (skribilo lib)
 
 	     (oop goops)
 	     (ice-9 optargs))
 
 
-;;;; ======================================================================
-;;;;
-;;;;				INVOKE
-;;;;
-;;;; ======================================================================
+
+;;;
+;;; Class definition.
+;;;
+
+(define-class <writer> ()
+  (ident	:init-keyword :ident	 :init-value '??? :getter writer-ident)
+  (class	:init-keyword :class	 :init-value 'unspecified
+		:getter writer-class)
+  (pred	:init-keyword :pred	 :init-value 'unspecified)
+  (upred	:init-keyword :upred	 :init-value 'unspecified)
+  (options	:init-keyword :options	 :init-value '()  :getter writer-options)
+  (verified?	:init-keyword :verified? :init-value #f)
+  (validate	:init-keyword :validate  :init-value #f)
+  (before	:init-keyword :before	 :init-value #f   :getter writer-before)
+  (action	:init-keyword :action	 :init-value #f   :getter writer-action)
+  (after	:init-keyword :after	 :init-value #f   :getter writer-after))
+
+(define (writer? obj)
+  (is-a? obj <writer>))
+
+(define-method (write-object (obj <writer>) port)
+  (format port "#[~A (~A) ~A]"
+	  (class-name (class-of obj))
+	  (slot-ref obj 'ident)
+	  (address-of obj)))
+
+
+
+;;;
+;;; Writer methods.
+;;;
+
 (define (invoke proc node e)
   (with-debug 5 'invoke
      (debug-item "e=" (engine-ident e))
@@ -56,11 +88,6 @@
 	     (proc node e)))))
 
 
-;;;; ======================================================================
-;;;;
-;;;;				LOOKUP-MARKUP-WRITER
-;;;;
-;;;; ======================================================================
 (define (lookup-markup-writer node e)
   (let ((writers (slot-ref e 'writers))
 	(delegate (slot-ref e 'delegate)))
@@ -76,11 +103,6 @@
 	(else
 	   #f)))))
 
-;;;; ======================================================================
-;;;;
-;;;;				MAKE-WRITER-PREDICATE
-;;;;
-;;;; ======================================================================
 (define (make-writer-predicate markup predicate class)
   (let* ((t1 (if (symbol? markup)
 		 (lambda (n e) (is-markup? n markup))
@@ -165,11 +187,6 @@
 			     options before ac after class validate))))))
 
 
-;;;; ======================================================================
-;;;;
-;;;;				MARKUP-WRITER-GET
-;;;;
-;;;; ======================================================================
 (define* (markup-writer-get markup :optional engine :key (class #f) (pred #f))
   (let ((e (or engine (default-engine))))
     (cond
@@ -193,14 +210,8 @@
 	     (else
 		#f))))))))
 
-;;;; ======================================================================
-;;;;
-;;;;				MARKUP-WRITER-GET*
-;;;;
-;;;; ======================================================================
 
 ;; Finds all 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
@@ -224,11 +235,6 @@
 	     (else
 	      (reverse! res)))))))))
 
-;;; ======================================================================
-;;;;
-;;;;				COPY-MARKUP-WRITER
-;;;;
-;;;; ======================================================================
 (define* (copy-markup-writer markup old-engine :optional new-engine
 			      :key (predicate 'unspecified)
 				   (class 'unspecified)
@@ -247,3 +253,5 @@
 	 :before    (if (unspecified? before)    (slot-ref old 'before) before)
 	 :action    (if (unspecified? action)    (slot-ref old 'action) action)
 	 :after     (if (unspecified? after)     (slot-ref old 'after) after))))
+
+;;; writer.scm ends here