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Diffstat (limited to 'src/stklos/writer.stk')
| -rw-r--r-- | src/stklos/writer.stk | 211 |
1 files changed, 211 insertions, 0 deletions
diff --git a/src/stklos/writer.stk b/src/stklos/writer.stk new file mode 100644 index 0000000..2b0f91c --- /dev/null +++ b/src/stklos/writer.stk @@ -0,0 +1,211 @@ +;;;; +;;;; 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)))) + +) |