Merge remote branch 'gnuradio/wip/udp_source_sink'

[debian/gnuradio] / grc / python / Port.py

diff --git a/grc/python/Port.py b/grc/python/Port.py
index b386e3f89aa2c1928345c8a17d0dcea9fcd4523a..6965371df8a9e922dbeb808d78da53bf93c81a59 100644 (file)
--- a/grc/python/Port.py
+++ b/grc/python/Port.py
@@ -18,12 +18,39 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 """
 
 from .. base.Port import Port as _Port
+from .. gui.Port import Port as _GUIPort
 import Constants
 
-class Port(_Port):
+def _get_source_from_virtual_sink_port(vsp):
+       """
+       Resolve the source port that is connected to the given virtual sink port.
+       Use the get source from virtual source to recursively resolve subsequent ports. 
+       """
+       try: return _get_source_from_virtual_source_port(
+               vsp.get_enabled_connections()[0].get_source())
+       except: raise Exception, 'Could not resolve source for virtual sink port %s'%vsp
 
-       ##possible port types
-       TYPES = ['complex', 'float', 'int', 'short', 'byte', 'msg']
+def _get_source_from_virtual_source_port(vsp, traversed=[]):
+       """
+       Recursively resolve source ports over the virtual connections.
+       Keep track of traversed sources to avoid recursive loops.
+       """
+       if not vsp.get_parent().is_virtual_source(): return vsp
+       if vsp in traversed: raise Exception, 'Loop found when resolving virtual source %s'%vsp
+       try: return _get_source_from_virtual_source_port(
+               _get_source_from_virtual_sink_port(
+                       filter(#get all virtual sinks with a matching stream id
+                               lambda vs: vs.get_param('stream_id').get_value() == vsp.get_parent().get_param('stream_id').get_value(),
+                               filter(#get all enabled blocks that are also virtual sinks
+                                       lambda b: b.is_virtual_sink(),
+                                       vsp.get_parent().get_parent().get_enabled_blocks(),
+                               ),
+                       )[0].get_sinks()[0]
+               ), traversed + [vsp],
+       )
+       except: raise Exception, 'Could not resolve source for virtual source port %s'%vsp
+
+class Port(_Port, _GUIPort):
 
        def __init__(self, block, n, dir):
                """
@@ -47,10 +74,13 @@ class Port(_Port):
                        n=n,
                        dir=dir,
                )
+               _GUIPort.__init__(self)
                self._nports = n.find('nports') or ''
                self._vlen = n.find('vlen') or ''
                self._optional = bool(n.find('optional'))
 
+       def get_types(self): return ('complex', 'float', 'int', 'short', 'byte', 'msg', '')
+
        def validate(self):
                _Port.validate(self)
                try: assert self.get_enabled_connections() or self.get_optional()
@@ -69,26 +99,19 @@ class Port(_Port):
                Handle the port cloning for virtual blocks.
                """
                _Port.rewrite(self)
-               if self.get_parent().get_key() in ('virtual_sink', 'virtual_source'):
-                       try:
-                               if self.get_parent().get_key() == 'virtual_sink':
-                                       source = self.get_enabled_connections()[0].get_source()
-                               if self.get_parent().get_key() == 'virtual_source':
-                                       source = filter(
-                                               lambda vs: vs.get_param('stream_id').get_value() == self.get_parent().get_param('stream_id').get_value(),
-                                               filter(
-                                                       lambda b: b.get_key() == 'virtual_sink',
-                                                       self.get_parent().get_parent().get_enabled_blocks(),
-                                               ),
-                                       )[0].get_sink('0').get_enabled_connections()[0].get_source()
-                               #clone type and vlen
+               if self.get_parent().is_virtual_sink() or self.get_parent().is_virtual_source():
+                       try: #clone type and vlen
+                               source = self.resolve_virtual_source()
                                self._type = str(source.get_type())
                                self._vlen = str(source.get_vlen())
-                       except:
-                               #reset type and vlen
+                       except: #reset type and vlen
                                self._type = ''
                                self._vlen = ''
 
+       def resolve_virtual_source(self):
+               if self.get_parent().is_virtual_sink(): return _get_source_from_virtual_sink_port(self)
+               if self.get_parent().is_virtual_source(): return _get_source_from_virtual_source_port(self)
+
        def get_vlen(self):
                """
                Get the vector length.