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"""
Copyright 2008 Free Software Foundation, Inc.
This file is part of GNU Radio
GNU Radio Companion is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
GNU Radio Companion is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
"""
##@package grc_gnuradio.Block
#Flow graph block.
from grc.elements.Block import Block as _Block
from grc import Utils
from utils import extract_docs
class Block(_Block):
##for make source to keep track of indexes
_source_count = 0
##for make sink to keep track of indexes
_sink_count = 0
def __init__(self, flow_graph, n):
"""
Make a new block from nested data.
@param flow graph the parent element
@param n the nested odict
@return block a new block
"""
#grab the data
doc = Utils.exists_or_else(n, 'doc', '')
imports = map(lambda i: i.strip(), Utils.listify(n, 'import'))
make = n['make']
checks = Utils.listify(n, 'check')
callbacks = Utils.listify(n, 'callback')
#build the block
_Block.__init__(
self,
flow_graph=flow_graph,
n=n,
)
self._doc = doc
self._imports = imports
self._make = make
self._callbacks = callbacks
self._checks = checks
def validate(self):
"""!
Validate this block.
Call the base class validate.
Evaluate the checks: each check must evaluate to True.
Adjust the nports.
"""
_Block.validate(self)
#evaluate the checks
for check in self._checks:
check_res = self.resolve_dependencies(check)
try:
check_eval = self.get_parent().evaluate(check_res)
try: assert check_eval
except AssertionError: self._add_error_message('Check "%s" failed.'%check)
except: self._add_error_message('Check "%s" did not evaluate.'%check)
for ports, Port in (
(self._sources, self.get_parent().get_parent().Source),
(self._sinks, self.get_parent().get_parent().Sink),
):
#how many ports?
num_ports = len(ports)
#do nothing for 0 ports
if not num_ports: continue
#get the nports setting
port0 = ports[str(0)]
nports = port0.get_nports()
#do nothing for no nports
if not nports: continue
#do nothing if nports is already num ports
if nports == num_ports: continue
#remove excess ports and connections
if nports < num_ports:
#remove the connections
for key in map(str, range(nports, num_ports)):
port = ports[key]
for connection in port.get_connections():
self.get_parent().remove_element(connection)
#remove the ports
for key in map(str, range(nports, num_ports)): ports.pop(key)
continue
#add more ports
if nports > num_ports:
for key in map(str, range(num_ports, nports)):
n = port0._n
n['key'] = key
port = Port(self, n)
ports[key] = port
continue
def get_doc(self):
doc = self._doc.strip('\n').replace('\\\n', '')
#merge custom doc with doxygen docs
return '\n'.join([doc, extract_docs.extract(self.get_key())]).strip('\n')
def get_imports(self):
"""!
Resolve all import statements.
Split each import statement at newlines.
Combine all import statments into a list.
Filter empty imports.
@return a list of import statements
"""
return filter(lambda i: i, sum(map(lambda i: self.resolve_dependencies(i).split('\n'), self._imports), []))
def get_make(self): return self.resolve_dependencies(self._make)
def get_callbacks(self):
"""!
Get a list of function callbacks for this block.
@return a list of strings
"""
return map(lambda c: self.get_id() + '.' + self.resolve_dependencies(c), self._callbacks)
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