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;;;; -*- mode: lisp -*-
;;;;
;;;; $Id: dom.lisp,v 1.2 2005-08-29 15:01:47 scaekenberghe Exp $
;;;;
;;;; This is the generic simple DOM parser and printer interface.
;;;;
;;;; Copyright (C) 2002, 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)
;;; top level DOM parser interface
(defgeneric parse-xml-dom (stream output-type)
(:documentation "Parse a character stream as XML and generate a DOM of output-type"))
(defun parse-xml (stream &key (output-type :lxml))
"Parse a character stream as XML and generate a DOM of output-type, defaulting to :lxml"
(parse-xml-dom stream output-type))
(defun parse-xml-string (string &key (output-type :lxml))
"Parse a string as XML and generate a DOM of output-type, defaulting to :lxml"
(with-input-from-string (stream string)
(parse-xml-dom stream output-type)))
(defun parse-xml-file (filename &key (output-type :lxml))
"Parse a character file as XML and generate a DOM of output-type, defaulting to :lxml"
(with-open-file (in filename :direction :input)
(parse-xml-dom in output-type)))
;;; top level DOM printer interface
(defgeneric print-xml-dom (dom input-type stream pretty level)
(:documentation "Generate XML output on a character stream from a DOM of input-type, optionally pretty printing using level"))
(defun print-xml (dom &key (stream t) (pretty nil) (input-type :lxml) (header))
"Generate XML output on a character stream (t by default) from a DOM of input-type (:lxml by default), optionally pretty printing (off by default), or adding a header (none by default)"
(when header (format stream header))
(when pretty (terpri stream))
(print-xml-dom dom input-type stream pretty 1))
(defun print-xml-string (dom &key (pretty nil) (input-type :lxml))
"Generate XML output to a string from a DOM of input-type (:lxml by default), optionally pretty printing (off by default)"
(with-output-to-string (stream)
(print-xml dom :stream stream :pretty pretty :input-type input-type)))
;;; shared/common support functions
(defun print-spaces (n stream &optional (preceding-newline t))
(when preceding-newline
(terpri stream))
(loop :repeat n
:do (write-char #\Space stream)))
(defun print-solitary-tag (tag stream)
(write-char #\< stream)
(print-identifier tag stream)
(write-string "/>" stream))
(defun print-closing-tag (tag stream)
(write-string "</" stream)
(print-identifier tag stream)
(write-char #\> stream))
(defun print-attribute (name value stream)
(write-char #\space stream)
(print-identifier name stream t)
(write-string "=\"" stream)
(print-string-xml value stream)
(write-char #\" stream))
;;;; eof
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