Initial import of Skribe 1.2d.

Initial import of Skribe 1.2d.


git-archimport-id: lcourtes@laas.fr--2004-libre/skribilo--devel--1.2--base-0

1 files changed, 211 insertions, 0 deletions

diff --git a/src/stklos/writer.stk b/src/stklos/writer.stk
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+;;;;
+;;;; writer.stk	-- Skribe Writer Stuff
+;;;; 
+;;;; Copyright © 2003-2004 Erick Gallesio - I3S-CNRS/ESSI <eg@essi.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: 15-Sep-2003 22:21 (eg)
+;;;; Last file update:  4-Mar-2004 10:48 (eg)
+;;;;
+
+
+(define-module SKRIBE-WRITER-MODULE
+  (import SKRIBE-DEBUG-MODULE SKRIBE-ENGINE-MODULE SKRIBE-OUTPUT-MODULE)
+  (export invoke markup-writer markup-writer-get markup-writer-get*
+	  lookup-markup-writer copy-markup-writer)
+
+;;;; ======================================================================
+;;;;
+;;;; 				INVOKE
+;;;;
+;;;; ======================================================================
+(define (invoke proc node e)
+  (with-debug 5 'invoke
+     (debug-item "e=" (engine-ident e))
+     (debug-item "node=" node " " (if (markup? node) (markup-markup node) ""))
+
+     (if (string? proc)
+	 (display proc)
+	 (if (procedure? proc)
+	     (proc node e)))))
+
+
+;;;; ======================================================================
+;;;;
+;;;; 				LOOKUP-MARKUP-WRITER
+;;;;
+;;;; ======================================================================
+(define (lookup-markup-writer node e)
+  (let ((writers (slot-ref e 'writers))
+	(delegate (slot-ref e 'delegate)))
+    (let Loop ((w* writers))
+      (cond
+	((pair? w*)
+	   (let ((pred (slot-ref (car w*) 'pred)))
+	     (if (pred node e)
+		 (car w*)
+		 (loop (cdr w*)))))
+	((engine? delegate)
+	   (lookup-markup-writer node delegate))
+	(else
+	   #f)))))
+
+;;;; ======================================================================
+;;;;
+;;;; 				MAKE-WRITER-PREDICATE
+;;;;
+;;;; ======================================================================
+(define (make-writer-predicate markup predicate class)
+  (let* ((t1 (if (symbol? markup)
+		 (lambda (n e) (is-markup? n markup))
+		 (lambda (n e) #t)))
+	 (t2 (if class
+		 (lambda (n e)
+		   (and (t1 n e) (equal? (markup-class n) class)))
+		 t1)))
+    (if predicate
+	(cond
+	  ((not (procedure? predicate))
+	     (skribe-error 'markup-writer
+			   "Illegal predicate (procedure expected)"
+			   predicate))
+	  ((not (eq? (%procedure-arity predicate) 2))
+	     (skribe-error 'markup-writer
+			   "Illegal predicate arity (2 arguments expected)"
+			   predicate))
+	  (else
+	     (lambda (n e)
+	       (and (t2 n e) (predicate n e)))))
+	t2)))
+
+;;;; ======================================================================
+;;;;
+;;;; 				MARKUP-WRITER
+;;;;
+;;;; ======================================================================
+(define (markup-writer markup :optional engine
+		       :key (predicate #f) (class #f) (options '())
+		            (validate #f)
+		            (before #f) (action 'unspecified) (after #f))
+  (let ((e (or engine (default-engine))))
+    (cond
+      ((and (not (symbol? markup)) (not (eq? markup #t)))
+       (skribe-error 'markup-writer "Illegal markup" markup))
+      ((not (engine? e))
+          (skribe-error 'markup-writer "Illegal engine" e))
+      ((and (not predicate)
+	    (not class)
+	    (null? options)
+	    (not before)
+	    (eq? action 'unspecified)
+	    (not after))
+         (skribe-error 'markup-writer "Illegal writer" markup))
+      (else
+       (let ((m  (make-writer-predicate markup predicate class))
+	     (ac (if (eq? action 'unspecified)
+		     (lambda (n e) (output (markup-body n) e))
+		     action)))
+	 (engine-add-writer! e markup m predicate
+			     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
+      ((not (symbol? markup))
+         (skribe-error 'markup-writer-get "Illegal symbol" markup))
+      ((not (engine? e))
+         (skribe-error 'markup-writer-get "Illegal engine" e))
+      (else
+       (let liip ((e e))
+	 (let loop ((w* (slot-ref e 'writers)))
+	   (cond
+	     ((pair? w*)
+	        (if (and (eq? (writer-ident (car w*)) markup)
+			 (equal? (writer-class (car w*)) class)
+			 (or (unspecified? pred)
+			     (eq? (slot-ref (car w*) 'upred) pred)))
+		    (car w*)
+		    (loop (cdr w*))))
+	     ((engine? (slot-ref e 'delegate))
+	        (liip (slot-ref e 'delegate)))
+	     (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
+      ((not (symbol? markup))
+       (skribe-error 'markup-writer "Illegal symbol" markup))
+      ((not (engine? e))
+       (skribe-error 'markup-writer "Illegal engine" e))
+      (else
+       (let liip ((e e)
+		  (res '()))
+	 (let loop ((w* (slot-ref e 'writers))
+		    (res res))
+	   (cond
+	     ((pair? w*)
+	      (if (and (eq? (slot-ref (car w*) 'ident) markup)
+		       (equal? (slot-ref (car w*) 'class) class))
+		  (loop (cdr w*) (cons (car w*) res))
+		  (loop (cdr w*) res)))
+	     ((engine? (slot-ref e 'delegate))
+	      (liip (slot-ref e 'delegate) res))
+	     (else
+	      (reverse! res)))))))))
+
+;;; ======================================================================
+;;;;
+;;;; 				COPY-MARKUP-WRITER
+;;;;
+;;;; ======================================================================
+(define (copy-markup-writer markup old-engine :optional new-engine
+			      :key (predicate 'unspecified) 
+			           (class 'unspecified) 
+				   (options 'unspecified)
+			           (validate 'unspecified) 
+				   (before 'unspecified) 
+				   (action 'unspecified) 
+				   (after 'unspecified))
+    (let ((old        (markup-writer-get markup old-engine))
+	  (new-engine (or new-engine old-engine)))
+      (markup-writer markup new-engine
+	 :pred      (if (unspecified? predicate) (slot-ref old 'pred) predicate)
+	 :class     (if (unspecified? class)     (slot-ref old 'class) class)
+	 :options   (if (unspecified? options)   (slot-ref old 'options) options)
+	 :validate  (if (unspecified? validate)  (slot-ref old 'validate) validate)
+	 :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))))
+
+)