437efa7686
Checked in the sources for this because it is tracked upstream in CVS and I can't be bothered to deal with that right now.
76 lines
2.9 KiB
Common Lisp
76 lines
2.9 KiB
Common Lisp
;;;; -*- mode: lisp -*-
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;;;;
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;;;; $Id: sxml-dom.lisp,v 1.4 2005/09/20 09:57:48 scaekenberghe Exp $
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;;;;
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;;;; LXML implementation of the generic DOM parser and printer.
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;;;;
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;;;; Copyright (C) 2003, 2004 Sven Van Caekenberghe, Beta Nine BVBA.
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;;;;
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;;;; You are granted the rights to distribute and use this software
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;;;; as governed by the terms of the Lisp Lesser General Public License
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;;;; (http://opensource.franz.com/preamble.html), also known as the LLGPL.
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(in-package :s-xml)
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;;; the sxml hooks to generate sxml
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(defun sxml-new-element-hook (name attributes seed)
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(declare (ignore name attributes seed))
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'())
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(defun sxml-finish-element-hook (name attributes parent-seed seed)
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(let ((xml-element (append (list name)
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(when attributes
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(list (let (list)
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(dolist (attribute attributes (cons :@ list))
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(push (list (car attribute) (cdr attribute)) list)))))
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(nreverse seed))))
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(cons xml-element parent-seed)))
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(defun sxml-text-hook (string seed)
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(cons string seed))
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;;; the standard DOM interfaces
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(defmethod parse-xml-dom (stream (output-type (eql :sxml)))
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(car (start-parse-xml stream
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(make-instance 'xml-parser-state
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:new-element-hook #'sxml-new-element-hook
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:finish-element-hook #'sxml-finish-element-hook
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:text-hook #'sxml-text-hook))))
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(defmethod print-xml-dom (dom (input-type (eql :sxml)) stream pretty level)
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(declare (special *namespaces*))
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(cond ((stringp dom) (print-string-xml dom stream))
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((consp dom)
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(let ((tag (first dom))
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attributes
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children)
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(if (and (consp (second dom)) (eq (first (second dom)) :@))
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(setf attributes (rest (second dom))
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children (rest (rest dom)))
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(setf children (rest dom)))
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(let ((*namespaces* (extend-namespaces (loop :for (name value) :in attributes
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:collect (cons name value))
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*namespaces*)))
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(write-char #\< stream)
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(print-identifier tag stream)
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(loop :for (name value) :in attributes
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:do (print-attribute name value stream))
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(if children
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(progn
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(write-char #\> stream)
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(if (and (= (length children) 1) (stringp (first children)))
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(print-string-xml (first children) stream)
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(progn
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(dolist (child children)
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(when pretty (print-spaces (* 2 level) stream))
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(if (stringp child)
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(print-string-xml child stream)
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(print-xml-dom child input-type stream pretty (1+ level))))
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(when pretty (print-spaces (* 2 (1- level)) stream))))
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(print-closing-tag tag stream))
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(write-string "/>" stream)))))
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(t (error "Input not recognized as SXML ~s" dom))))
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;;;; eof
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