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;;;; -*- mode: lisp -*-
;;;;
;;;; $Id: sxml-dom.lisp,v 1.4 2005/09/20 09:57:48 scaekenberghe Exp $
;;;;
;;;; LXML implementation of the generic DOM parser and printer.
;;;;
;;;; Copyright (C) 2003, 2004 Sven Van Caekenberghe, Beta Nine BVBA.
;;;;
;;;; You are granted the rights to distribute and use this software
;;;; as governed by the terms of the Lisp Lesser General Public License
;;;; (http://opensource.franz.com/preamble.html), also known as the LLGPL.
(in-package :s-xml)
;;; the sxml hooks to generate sxml
(defun sxml-new-element-hook (name attributes seed)
(declare (ignore name attributes seed))
'())
(defun sxml-finish-element-hook (name attributes parent-seed seed)
(let ((xml-element (append (list name)
(when attributes
(list (let (list)
(dolist (attribute attributes (cons :@ list))
(push (list (car attribute) (cdr attribute)) list)))))
(nreverse seed))))
(cons xml-element parent-seed)))
(defun sxml-text-hook (string seed)
(cons string seed))
;;; the standard DOM interfaces
(defmethod parse-xml-dom (stream (output-type (eql :sxml)))
(car (start-parse-xml stream
(make-instance 'xml-parser-state
:new-element-hook #'sxml-new-element-hook
:finish-element-hook #'sxml-finish-element-hook
:text-hook #'sxml-text-hook))))
(defmethod print-xml-dom (dom (input-type (eql :sxml)) stream pretty level)
(declare (special *namespaces*))
(cond ((stringp dom) (print-string-xml dom stream))
((consp dom)
(let ((tag (first dom))
attributes
children)
(if (and (consp (second dom)) (eq (first (second dom)) :@))
(setf attributes (rest (second dom))
children (rest (rest dom)))
(setf children (rest dom)))
(let ((*namespaces* (extend-namespaces (loop :for (name value) :in attributes
:collect (cons name value))
*namespaces*)))
(write-char #\< stream)
(print-identifier tag stream)
(loop :for (name value) :in attributes
:do (print-attribute name value stream))
(if children
(progn
(write-char #\> stream)
(if (and (= (length children) 1) (stringp (first children)))
(print-string-xml (first children) stream)
(progn
(dolist (child children)
(when pretty (print-spaces (* 2 level) stream))
(if (stringp child)
(print-string-xml child stream)
(print-xml-dom child input-type stream pretty (1+ level))))
(when pretty (print-spaces (* 2 (1- level)) stream))))
(print-closing-tag tag stream))
(write-string "/>" stream)))))
(t (error "Input not recognized as SXML ~s" dom))))
;;;; eof
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