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;;; -*- Mode: Lisp; readtable: runes; -*-
;;; (c) copyright 2007 David Lichteblau
;;; This library is free software; you can redistribute it and/or
;;; modify it under the terms of the GNU Library General Public
;;; License as published by the Free Software Foundation; either
;;; version 2 of the License, or (at your option) any later version.
;;;
;;; This library 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
;;; Library General Public License for more details.
;;;
;;; You should have received a copy of the GNU Library General Public
;;; License along with this library; if not, write to the
;;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;;; Boston, MA 02111-1307 USA.
(in-package :cxml)
(defun klacks:make-tapping-source (upstream-source &optional sax-handler)
(make-instance 'klacks:tapping-source
:upstream-source upstream-source
:dribble-handler sax-handler))
(defclass klacks:tapping-source (klacks:source)
((upstream-source :initarg :upstream-source :accessor upstream-source)
(dribble-handler :initarg :dribble-handler :accessor dribble-handler)
(seen-event-p :initform nil :accessor seen-event-p)
(document-done-p :initform nil :accessor document-done-p)))
(defmethod initialize-instance :after ((instance klacks:tapping-source) &key)
(let ((s-p (make-instance 'klacksax :source (upstream-source instance))))
(sax:register-sax-parser (dribble-handler instance) s-p)))
;;; event dribbling
(defun maybe-dribble (source)
(unless (or (seen-event-p source) (document-done-p source))
(when (eq (klacks:peek (upstream-source source)) :end-document)
(setf (document-done-p source) t))
(klacks:serialize-event (upstream-source source)
(dribble-handler source)
:consume nil)
(setf (seen-event-p source) t)))
(defmethod klacks:peek ((source klacks:tapping-source))
(multiple-value-prog1
(klacks:peek (upstream-source source))
(maybe-dribble source)))
(defmethod klacks:peek-value ((source klacks:tapping-source))
(multiple-value-prog1
(klacks:peek-value (upstream-source source))
(maybe-dribble source)))
(defmethod klacks:peek-next ((source klacks:tapping-source))
(setf (seen-event-p source) nil)
(multiple-value-prog1
(klacks:peek-next (upstream-source source))
(maybe-dribble source)))
(defmethod klacks:consume ((source klacks:tapping-source))
(maybe-dribble source)
(multiple-value-prog1
(klacks:consume (upstream-source source))
(setf (seen-event-p source) nil)))
;;; loop through
(defmethod klacks:close-source ((source klacks:tapping-source))
(klacks:close-source (upstream-source source)))
(defmethod klacks:map-attributes (fn (source klacks:tapping-source))
(klacks:map-attributes fn (upstream-source source)))
(defmethod klacks:map-current-namespace-declarations
(fn (source klacks:tapping-source))
(klacks:map-current-namespace-declarations fn (upstream-source source)))
(defmethod klacks:list-attributes ((source klacks:tapping-source))
(klacks:list-attributes (upstream-source source)))
(defmethod klacks:current-line-number ((source klacks:tapping-source))
(klacks:current-line-number (upstream-source source)))
(defmethod klacks:current-column-number ((source klacks:tapping-source))
(klacks:current-column-number (upstream-source source)))
(defmethod klacks:current-system-id ((source klacks:tapping-source))
(klacks:current-system-id (upstream-source source)))
(defmethod klacks:current-xml-base ((source klacks:tapping-source))
(klacks:current-xml-base (upstream-source source)))
(defmethod klacks:current-cdata-section-p ((source klacks:tapping-source))
(klacks:current-cdata-section-p (upstream-source source)))
(defmethod klacks:find-namespace-binding
(prefix (source klacks:tapping-source))
(klacks:find-namespace-binding prefix (upstream-source source)))
(defmethod klacks:decode-qname (qname (source klacks:tapping-source))
(klacks:decode-qname qname (upstream-source source)))
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