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/* Interface to libxml2.
Copyright (C) 2010, 2011 Free Software Foundation, Inc.
This file is part of GNU Emacs.
GNU Emacs is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
GNU Emacs 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
#ifdef HAVE_LIBXML2
#include <setjmp.h>
#include <libxml/tree.h>
#include <libxml/parser.h>
#include <libxml/HTMLparser.h>
#include "lisp.h"
#include "buffer.h"
Lisp_Object make_dom (xmlNode *node)
{
if (node->type == XML_ELEMENT_NODE)
{
Lisp_Object result = Fcons (intern (node->name), Qnil);
xmlNode *child;
xmlAttr *property;
Lisp_Object plist = Qnil;
/* First add the attributes. */
property = node->properties;
while (property != NULL)
{
if (property->children &&
property->children->content)
{
plist = Fcons (Fcons (intern (property->name),
build_string (property->children->content)),
plist);
}
property = property->next;
}
result = Fcons (Fnreverse (plist), result);
/* Then add the children of the node. */
child = node->children;
while (child != NULL)
{
result = Fcons (make_dom (child), result);
child = child->next;
}
return Fnreverse (result);
}
else if (node->type == XML_TEXT_NODE || node->type == XML_CDATA_SECTION_NODE)
{
if (node->content)
return build_string (node->content);
else
return Qnil;
}
else
return Qnil;
}
static Lisp_Object
parse_region (Lisp_Object start, Lisp_Object end, Lisp_Object base_url, int htmlp)
{
xmlDoc *doc;
xmlNode *node;
Lisp_Object result = Qnil;
const char *burl = "";
EMACS_INT bytes;
EMACS_INT istart, iend;
LIBXML_TEST_VERSION;
validate_region (&start, &end);
istart = XINT (start);
iend = XINT (end);
if (istart < GPT && GPT < iend)
move_gap (iend);
if (! NILP (base_url))
{
CHECK_STRING (base_url);
burl = SDATA (base_url);
}
bytes = CHAR_TO_BYTE (iend) - CHAR_TO_BYTE (istart);
if (htmlp)
doc = htmlReadMemory (BYTE_POS_ADDR (CHAR_TO_BYTE (istart)),
bytes, burl, "utf-8",
HTML_PARSE_RECOVER|HTML_PARSE_NONET|
HTML_PARSE_NOWARNING|HTML_PARSE_NOERROR|
HTML_PARSE_NOBLANKS);
else
doc = xmlReadMemory (BYTE_POS_ADDR (CHAR_TO_BYTE (istart)),
bytes, burl, "utf-8",
XML_PARSE_NONET|XML_PARSE_NOWARNING|
XML_PARSE_NOERROR);
if (doc != NULL)
{
node = xmlDocGetRootElement (doc);
if (node != NULL)
result = make_dom (node);
xmlFreeDoc (doc);
xmlCleanupParser ();
}
return result;
}
DEFUN ("libxml-parse-html-region", Flibxml_parse_html_region,
Slibxml_parse_html_region,
2, 3, 0,
doc: /* Parse the region as an HTML document and return the parse tree.
If BASE-URL is non-nil, it is used to expand relative URLs. */)
(Lisp_Object start, Lisp_Object end, Lisp_Object base_url)
{
return parse_region (start, end, base_url, 1);
}
DEFUN ("libxml-parse-xml-region", Flibxml_parse_xml_region,
Slibxml_parse_xml_region,
2, 3, 0,
doc: /* Parse the region as an XML document and return the parse tree.
If BASE-URL is non-nil, it is used to expand relative URLs. */)
(Lisp_Object start, Lisp_Object end, Lisp_Object base_url)
{
return parse_region (start, end, base_url, 0);
}
/***********************************************************************
Initialization
***********************************************************************/
void
syms_of_xml (void)
{
defsubr (&Slibxml_parse_html_region);
defsubr (&Slibxml_parse_xml_region);
}
#endif /* HAVE_LIBXML2 */
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