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Diffstat (limited to 'src/stklos/output.stk')
| -rw-r--r-- | src/stklos/output.stk | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/src/stklos/output.stk b/src/stklos/output.stk new file mode 100644 index 0000000..3c00323 --- /dev/null +++ b/src/stklos/output.stk @@ -0,0 +1,158 @@ +;;;; +;;;; output.stk -- Skribe Output Stage +;;;; +;;;; Copyright © 2003-2004 Erick Gallesio - I3S-CNRS/ESSI <eg@unice.fr> +;;;; +;;;; +;;;; This program is free software; you can redistribute it and/or modify +;;;; it under the terms of the GNU General Public License as published by +;;;; the Free Software Foundation; either version 2 of the License, or +;;;; (at your option) any later version. +;;;; +;;;; This program is distributed in the hope that it will be useful, +;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of +;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +;;;; GNU General Public License for more details. +;;;; +;;;; You should have received a copy of the GNU General Public License +;;;; along with this program; if not, write to the Free Software +;;;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, +;;;; USA. +;;;; +;;;; Author: Erick Gallesio [eg@essi.fr] +;;;; Creation date: 13-Aug-2003 18:42 (eg) +;;;; Last file update: 5-Mar-2004 10:32 (eg) +;;;; + +(define-module SKRIBE-OUTPUT-MODULE + (import SKRIBE-DEBUG-MODULE SKRIBE-ENGINE-MODULE SKRIBE-WRITER-MODULE) + (export output) + + +(define-generic out) + +(define (%out/writer n e w) + (with-debug 5 'out/writer + (debug-item "n=" n " " (if (markup? n) (markup-markup n) "")) + (debug-item "e=" (engine-ident e)) + (debug-item "w=" (writer-ident w)) + + (when (writer? w) + (invoke (slot-ref w 'before) n e) + (invoke (slot-ref w 'action) n e) + (invoke (slot-ref w 'after) n e)))) + + + +(define (output node e . writer) + (with-debug 3 'output + (debug-item "node=" node " " (if (markup? node) (markup-markup node) "")) + (debug-item "writer=" writer) + (if (null? writer) + (out node e) + (cond + ((is-a? (car writer) <writer>) + (%out/writer node e (car writer))) + ((not (car writer)) + (skribe-error 'output + (format "Illegal ~A user writer" (engine-ident e)) + (if (markup? node) (markup-markup node) node))) + (else + (skribe-error 'output "Illegal user writer" (car writer))))))) + + +;;; +;;; OUT implementations +;;; +(define-method out (node e) + #f) + + +(define-method out ((node <pair>) e) + (let Loop ((n* node)) + (cond + ((pair? n*) + (out (car n*) e) + (loop (cdr n*))) + ((not (null? n*)) + (skribe-error 'out "Illegal argument" n*))))) + + +(define-method out ((node <string>) e) + (let ((f (slot-ref e 'filter))) + (if (procedure? f) + (display (f node)) + (display node)))) + + +(define-method out ((node <number>) e) + (out (number->string node) e)) + + +(define-method out ((n <processor>) e) + (let ((combinator (slot-ref n 'combinator)) + (engine (slot-ref n 'engine)) + (body (slot-ref n 'body)) + (procedure (slot-ref n 'procedure))) + (let ((newe (processor-get-engine combinator engine e))) + (out (procedure body newe) newe)))) + + +(define-method out ((n <command>) e) + (let* ((fmt (slot-ref n 'fmt)) + (body (slot-ref n 'body)) + (lb (length body)) + (lf (string-length fmt))) + (define (loops i n) + (if (= i lf) + (begin + (if (> n 0) + (if (<= n lb) + (output (list-ref body (- n 1)) e) + (skribe-error '! "Too few arguments provided" n))) + lf) + (let ((c (string-ref fmt i))) + (cond + ((char=? c #\$) + (display "$") + (+ 1 i)) + ((not (char-numeric? c)) + (cond + ((= n 0) + i) + ((<= n lb) + (output (list-ref body (- n 1)) e) + i) + (else + (skribe-error '! "Too few arguments provided" n)))) + (else + (loops (+ i 1) + (+ (- (char->integer c) + (char->integer #\0)) + (* 10 n)))))))) + + (let loop ((i 0)) + (cond + ((= i lf) + #f) + ((not (char=? (string-ref fmt i) #\$)) + (display (string-ref fmt i)) + (loop (+ i 1))) + (else + (loop (loops (+ i 1) 0))))))) + + +(define-method out ((n <handle>) e) + 'unspecified) + + +(define-method out ((n <unresolved>) e) + (skribe-error 'output "Orphan unresolved" n)) + + +(define-method out ((node <markup>) e) + (let ((w (lookup-markup-writer node e))) + (if (writer? w) + (%out/writer node e w) + (output (slot-ref node 'body) e)))) +) |