Added virtual sink and logic to clone port.

Tweaks to the base validation routines.
Validate twice in the update until rewrite functions are implemented.

1 files changed, 14 insertions, 0 deletions

diff --git a/grc/python/Port.py b/grc/python/Port.py
index f71c5fa35..bfbac7237 100644
--- a/grc/python/Port.py
+++ b/grc/python/Port.py
@@ -57,11 +57,25 @@ class Port(_Port):
 		except AssertionError: self.add_error_message('Port is not connected.')
 		try: assert self.is_source() or len(self.get_enabled_connections()) <= 1
 		except AssertionError: self.add_error_message('Port has too many connections.')
+		################################################################
+		# message port logic
+		################################################################
 		if self.get_type() == 'msg':
 			try: assert not self.get_nports()
 			except AssertionError: self.add_error_message('A port of type "msg" cannot have "nports" set.')
 			try: assert self.get_vlen() == 1
 			except AssertionError: self.add_error_message('A port of type "msg" must have a "vlen" of 1.')
+		################################################################
+		# virtual sink logic
+		################################################################
+		if self.get_parent().get_key() == 'virtual_sink':
+			if self.get_enabled_connections(): #clone type and vlen
+				source = self.get_enabled_connections()[0].get_source()
+				self._type = str(source.get_type())
+				self._vlen = str(source.get_vlen())
+			else: #reset type and vlen
+				self._type = ''
+				self._vlen = ''
 
 	def get_vlen(self):
 		"""