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Diffstat (limited to 'third-party/s-xml/src/lxml-dom.lisp')
| -rw-r--r-- | third-party/s-xml/src/lxml-dom.lisp | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/third-party/s-xml/src/lxml-dom.lisp b/third-party/s-xml/src/lxml-dom.lisp new file mode 100644 index 0000000..449fea3 --- /dev/null +++ b/third-party/s-xml/src/lxml-dom.lisp @@ -0,0 +1,83 @@ +;;;; -*- mode: lisp -*- +;;;; +;;;; $Id: lxml-dom.lisp,v 1.6 2005-11-20 14:34:15 scaekenberghe Exp $ +;;;; +;;;; LXML implementation of the generic DOM parser and printer. +;;;; +;;;; 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) + +;;; the lxml hooks to generate lxml + +(defun lxml-new-element-hook (name attributes seed) + (declare (ignore name attributes seed)) + '()) + +(defun lxml-finish-element-hook (name attributes parent-seed seed) + (let ((xml-element + (cond ((and (null seed) (null attributes)) + name) + (attributes + `((,name ,@(let (list) + (dolist (attribute attributes list) + (push (cdr attribute) list) + (push (car attribute) list)))) + ,@(nreverse seed))) + (t + `(,name ,@(nreverse seed)))))) + (cons xml-element parent-seed))) + +(defun lxml-text-hook (string seed) + (cons string seed)) + +;;; standard DOM interfaces + +(defmethod parse-xml-dom (stream (output-type (eql :lxml))) + (car (start-parse-xml stream + (make-instance 'xml-parser-state + :new-element-hook #'lxml-new-element-hook + :finish-element-hook #'lxml-finish-element-hook + :text-hook #'lxml-text-hook)))) + +(defun plist->alist (plist) + (when plist + (cons (cons (first plist) (second plist)) + (plist->alist (rest (rest plist)))))) + +(defmethod print-xml-dom (dom (input-type (eql :lxml)) stream pretty level) + (declare (special *namespaces*)) + (cond ((symbolp dom) (print-solitary-tag dom stream)) + ((stringp dom) (print-string-xml dom stream)) + ((consp dom) + (let (tag attributes) + (cond ((symbolp (first dom)) (setf tag (first dom))) + ((consp (first dom)) (setf tag (first (first dom)) + attributes (plist->alist (rest (first dom))))) + (t (error "Input not recognized as LXML ~s" dom))) + (let ((*namespaces* (extend-namespaces attributes *namespaces*))) + (write-char #\< stream) + (print-identifier tag stream) + (loop :for (name . value) :in attributes + :do (print-attribute name value stream)) + (if (rest dom) + (let ((children (rest dom))) + (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 LXML ~s" dom)))) + +;;;; eof
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