diff planemo/lib/python3.7/site-packages/rdflib/plugins/parsers/pyRdfa/embeddedRDF.py @ 1:56ad4e20f292 draft

"planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/planemo/lib/python3.7/site-packages/rdflib/plugins/parsers/pyRdfa/embeddedRDF.py	Fri Jul 31 00:32:28 2020 -0400
@@ -0,0 +1,88 @@
+# -*- coding: utf-8 -*-
+"""
+Extracting possible embedded RDF/XML content from the file and parse it separately into the Graph. This is used, for example
+by U{SVG 1.2 Tiny<http://www.w3.org/TR/SVGMobile12/>}.
+
+@author: U{Ivan Herman<a href="http://www.w3.org/People/Ivan/">}
+@license: This software is available for use under the
+U{W3C® SOFTWARE NOTICE AND LICENSE<href="http://www.w3.org/Consortium/Legal/2002/copyright-software-20021231">}
+@contact: Ivan Herman, [e-mail]
+@version: $Id: embeddedRDF.py,v 1.15 2012/11/16 17:51:53 ivan Exp $
+"""
+
+# Python 3 foolproof way...
+try :
+	from io import StringIO
+except :
+	from io import StringIO
+
+from .host  import HostLanguage, accept_embedded_rdf_xml, accept_embedded_turtle
+from .utils import return_XML
+import re, sys
+
+def handle_embeddedRDF(node, graph, state) :
+	"""
+	Handles embedded RDF. There are two possibilities:
+
+	 - the file is one of the XML dialects that allows for an embedded RDF/XML portion. See the L{host.accept_embedded_rdf_xml} for those (a typical example is SVG).
+	 - the file is HTML and there is a turtle portion in the C{<script>} element with type text/turtle.
+
+	@param node: a DOM node for the top level element
+	@param graph: target rdf graph
+	@type graph: RDFLib's Graph object instance
+	@param state: the inherited state (namespaces, lang, etc)
+	@type state: L{state.ExecutionContext}
+	@return: whether an RDF/XML or turtle content has been detected or not. If TRUE, the RDFa processing should not occur on the node and its descendents.
+	@rtype: Boolean
+	"""
+	#def _get_prefixes_in_turtle() :
+	#	retval = ""
+	#	for key in state.term_or_curie.ns :
+	#		retval += "@prefix %s: <%s> .\n" % (key, state.term_or_curie.ns[key])
+	#	retval += '\n'
+	#	return retval
+
+	# This feature is optional!
+	def _get_literal(Pnode):
+		"""
+		Get the full text
+		@param Pnode: DOM Node
+		@return: string
+		"""
+		rc = ""
+		for node in Pnode.childNodes:
+			if node.nodeType in [node.TEXT_NODE, node.CDATA_SECTION_NODE] :
+				rc = rc + node.data
+		# Sigh... the HTML5 parser does not recognize the CDATA escapes, ie, it just passes on the <![CDATA[ and ]]> strings:-(
+		return rc.replace("<![CDATA[","").replace("]]>","")
+
+	if state.options.embedded_rdf  :
+		# Embedded turtle, per the latest Turtle draft
+		if state.options.host_language in accept_embedded_turtle and node.nodeName.lower() == "script" :
+			if node.hasAttribute("type") and node.getAttribute("type") == "text/turtle" :
+				#prefixes = _get_prefixes_in_turtle()
+				#content  = _get_literal(node)
+				#rdf = StringIO(prefixes + content)
+				content  = _get_literal(node)
+				rdf = StringIO(content)
+				try :
+					graph.parse(rdf, format="n3", publicID = state.base)
+					state.options.add_info("The output graph includes triples coming from an embedded Turtle script")
+				except :
+					(type,value,traceback) = sys.exc_info()
+					state.options.add_error("Embedded Turtle content could not be parsed (problems with %s?); ignored" % value)
+			return True
+		elif state.options.host_language in accept_embedded_rdf_xml and node.localName == "RDF" and node.namespaceURI == "http://www.w3.org/1999/02/22-rdf-syntax-ns#" :
+			rdf = StringIO(return_XML(state, node))
+			try :
+				graph.parse(rdf)
+				state.options.add_info("The output graph includes triples coming from an embedded RDF/XML subtree")
+			except :
+				(type,value,traceback) = sys.exc_info()
+				state.options.add_error("Embedded RDF/XML content could not parsed (problems with %s?); ignored" % value)
+			return True
+		else :
+			return False
+	else :
+		return False
+