+ """

+ 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

+ """

+ 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

+ """

+ Resolve the sink port that is connected to the given virtual source port.

+ Use the get sink from virtual sink to recursively resolve subsequent ports.

+ """

+ try: return _get_sink_from_virtual_sink_port(

+ vsp.get_enabled_connections()[0].get_sink()) # Could have many connections, but use first

+ except: raise Exception, 'Could not resolve source for virtual source port %s'%vsp

+ """

+ Recursively resolve sink ports over the virtual connections.

+ Keep track of traversed sinks to avoid recursive loops.

+ """

+ if not vsp.get_parent().is_virtual_sink(): return vsp

+ if vsp in traversed: raise Exception, 'Loop found when resolving virtual sink %s'%vsp

+ try: return _get_sink_from_virtual_sink_port(

+ _get_sink_from_virtual_source_port(

+ filter(#get all virtual source 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_source(),

+ vsp.get_parent().get_parent().get_enabled_blocks(),

+ ),

+ )[0].get_sources()[0]

+ ), traversed + [vsp],

+ )

+ except: raise Exception, 'Could not resolve source for virtual sink port %s'%vsp

+ def __init__(self, block, n, dir):

+ """

+ Make a new port from nested data.

+

+ Args:

+ block: the parent element

+ n: the nested odict

+ dir: the direction

+ """

+ self._n = n

+ if n['type'] == 'msg': n['key'] = 'msg'

+ if n['type'] == 'message': n['key'] = n['name']

+ if dir == 'source' and not n.find('key'):

+ n['key'] = str(block._source_count)

+ block._source_count += 1

+ if dir == 'sink' and not n.find('key'):

+ n['key'] = str(block._sink_count)

+ block._sink_count += 1

+ #build the port

+ _Port.__init__(

+ self,

+ block=block,

+ 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 Constants.TYPE_TO_SIZEOF.keys()

+

+ def is_type_empty(self): return not self._n['type']

+

+ def validate(self):

+ _Port.validate(self)

+ if not self.get_enabled_connections() and not self.get_optional():

+ self.add_error_message('Port is not connected.')

+ if not self.is_source() and (not self.get_type() == "message") and len(self.get_enabled_connections()) > 1:

+ self.add_error_message('Port has too many connections.')

+ #message port logic

+ if self.get_type() == 'msg':

+ if self.get_nports():

+ self.add_error_message('A port of type "msg" cannot have "nports" set.')

+ if self.get_vlen() != 1:

+ self.add_error_message('A port of type "msg" must have a "vlen" of 1.')

+

+ def rewrite(self):

+ """

+ Handle the port cloning for virtual blocks.

+ """

+ _Port.rewrite(self)

+ if self.is_type_empty():

+ try: #clone type and vlen

+ source = self.resolve_empty_type()

+ self._type = str(source.get_type())

+ self._vlen = str(source.get_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 resolve_empty_type(self):

+ if self.is_sink():

+ try:

+ src = _get_source_from_virtual_sink_port(self)

+ if not src.is_type_empty(): return src

+ except: pass

+ sink = _get_sink_from_virtual_sink_port(self)

+ if not sink.is_type_empty(): return sink

+ if self.is_source():

+ try:

+ src = _get_source_from_virtual_source_port(self)

+ if not src.is_type_empty(): return src

+ except: pass

+ sink = _get_sink_from_virtual_source_port(self)

+ if not sink.is_type_empty(): return sink

+

+ def get_vlen(self):

+ """

+ Get the vector length.

+ If the evaluation of vlen cannot be cast to an integer, return 1.

+

+ Returns:

+ the vector length or 1

+ """

+ vlen = self.get_parent().resolve_dependencies(self._vlen)

+ try: return int(self.get_parent().get_parent().evaluate(vlen))

+ except: return 1

+

+ def get_nports(self):

+ """

+ Get the number of ports.

+ If already blank, return a blank

+ If the evaluation of nports cannot be cast to an integer, return 1.

+

+ Returns:

+ the number of ports or 1

+ """

+ nports = self.get_parent().resolve_dependencies(self._nports)

+ #return blank if nports is blank

+ if not nports: return ''

+ try:

+ nports = int(self.get_parent().get_parent().evaluate(nports))

+ if 0 < nports: return nports

+ except: return 1

+

+ def get_optional(self): return bool(self._optional)

+

+ def get_color(self):

+ """

+ Get the color that represents this port's type.

+ Codes differ for ports where the vec length is 1 or greater than 1.

+

+ Returns:

+ a hex color code.

+ """

+ try:

+ color = Constants.TYPE_TO_COLOR[self.get_type()]

+ vlen = self.get_vlen()

+ if vlen == 1: return color

+ color_val = int(color[1:], 16)

+ r = (color_val >> 16) & 0xff

+ g = (color_val >> 8) & 0xff

+ b = (color_val >> 0) & 0xff

+ dark = (0, 0, 30, 50, 70)[min(4, vlen)]

+ r = max(r-dark, 0)

+ g = max(g-dark, 0)

+ b = max(b-dark, 0)

+ return '#%.2x%.2x%.2x'%(r, g, b)

+ except: return _Port.get_color(self)

+

+ def copy(self, new_key=None):

+ n = self._n.copy()

+ #remove nports from the key so the copy cannot be a duplicator

+ if n.has_key('nports'): n.pop('nports')

+ if new_key: n['key'] = new_key

+ return self.__class__(self.get_parent(), n, self._dir)