/* Fo
 * libfo-compat.c: LibFo compatibility processing
 *
 * Copyright (C) 2006 Sun Microsystems
 * Copyright (C) 2007 Menteith Consulting
 *
 * See COPYING for the status of this software.
 */

#include "libfo/fo-xml-doc-private.h"
#include "libfo/libfo-compat.h"
#include "libfo/fo-xslt-transformer.h"
#include <libxml/xmlversion.h>
#include <libxml/xmlmemory.h>
#include <libxml/debugXML.h>
#include <libxml/HTMLtree.h>
#include <libxslt/xslt.h>
#include <libxslt/xsltInternals.h>
#include <libxslt/transform.h>
#include <libxslt/xsltutils.h>

const char *libfo_compat_error_messages [] = {
  N_("libfo-compat error")
};

static const gchar* stylesheet =
REPLACE_ME;

/**
 * libfo_compat_get_stylesheet:
 *
 * Get the built-in compatibility stylesheet as a single, rather long
 * string.
 * 
 * Return value: The built-in stylesheet.
 **/
const gchar*
libfo_compat_get_stylesheet (void)
{
  return stylesheet;
}

/**
 * libfo_compat_make_compatible:
 * @result_tree:   Result of previous parse or transformation.
 * @libfo_context: #FoLibfoContext.
 * @error:         Indication of any error that occurred.
 * 
 * Make @result_tree compatible with libfo by applying the built-in
 * copy of the 'libfo-compat.xsl' stylesheet.
 *
 * Return value: A new result tree.
 **/
FoXmlDoc *
libfo_compat_make_compatible (FoXmlDoc       *result_tree,
			      FoLibfoContext *libfo_context,
			      GError        **error)
{
  FoXmlDoc *compatible_result;
  GError *tmp_error = NULL;
  gchar* base = NULL;

  g_return_val_if_fail (result_tree != NULL, NULL);

  base = fo_xml_doc_get_base (result_tree);

  FoXmlDoc *stylesheet_doc = fo_xml_doc_new_from_string (stylesheet,
							 base,
							 NULL,
							 libfo_context,
							 &tmp_error);

  if (tmp_error != NULL)
    {
      g_propagate_error (error,
			 tmp_error);
      return NULL;
    }

  compatible_result = fo_xslt_transformer_do_transform (result_tree,
							stylesheet_doc,
							&tmp_error);
  
  fo_xml_doc_set_base (compatible_result,
		       base);
  g_free (base);

  if (tmp_error != NULL)
    {
      g_propagate_error (error,
			 tmp_error);
      return NULL;
    }

  return compatible_result;
}