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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.Param
#Flow graph block parameters.
from utils import expr_utils
from grc.elements.Param import Param as _Param
import os
class Param(_Param):
_init = False
_hostage_cells = list()
##possible param types
TYPES = _Param.TYPES + [
'complex', 'real', 'int',
'complex_vector', 'real_vector', 'int_vector',
'hex', 'string',
'file_open', 'file_save',
'id',
'grid_pos', 'import',
]
def get_hide(self):
"""!
Get the hide value from the base class.
If hide was empty, and this is a type controller, set hide to part.
If hide was empty, and this is an id of a non variable, set hide to part.
@return hide the hide property string
"""
hide = _Param.get_hide(self)
#hide IO controlling params
if not hide and self.get_key() in (
'type', 'vlen', 'num_inputs', 'num_outputs'
): hide = 'part'
#hide ID in non variable blocks
elif not hide and self.get_key() == 'id' and self.get_parent().get_key() not in (
'variable', 'variable_slider', 'variable_chooser', 'variable_text_box', 'parameter', 'options'
): hide = 'part'
return hide
def evaluate(self):
"""!
Evaluate the value.
@return evaluated type
"""
self._lisitify_flag = False
self._stringify_flag = False
self._hostage_cells = list()
def eval_string(v):
try:
e = self.get_parent().get_parent().evaluate(v)
assert(isinstance(e, str))
return e
except:
self._stringify_flag = True
return v
t = self.get_type()
v = self.get_value()
#########################
# Enum Type
#########################
if self.is_enum(): return self.get_value()
#########################
# Numeric Types
#########################
elif t in ('raw', 'complex', 'real', 'int', 'complex_vector', 'real_vector', 'int_vector', 'hex'):
#raise exception if python cannot evaluate this value
try: e = self.get_parent().get_parent().evaluate(v)
except:
self._add_error_message('Value "%s" cannot be evaluated.'%v)
raise Exception
#raise an exception if the data is invalid
if t == 'raw': return e
elif t == 'complex':
try: assert(isinstance(e, (complex, float, int, long)))
except AssertionError:
self._add_error_message('Expression "%s" is invalid for type complex.'%str(e))
raise Exception
return e
elif t == 'real':
try: assert(isinstance(e, (float, int, long)))
except AssertionError:
self._add_error_message('Expression "%s" is invalid for type real.'%str(e))
raise Exception
return e
elif t == 'int':
try: assert(isinstance(e, (int, long)))
except AssertionError:
self._add_error_message('Expression "%s" is invalid for type integer.'%str(e))
raise Exception
return e
elif t == 'complex_vector':
if not isinstance(e, (tuple, list, set)):
self._lisitify_flag = True
e = [e]
try:
for ei in e:
assert(isinstance(ei, (complex, float, int, long)))
except AssertionError:
self._add_error_message('Expression "%s" is invalid for type complex vector.'%str(e))
raise Exception
return e
elif t == 'real_vector':
if not isinstance(e, (tuple, list, set)):
self._lisitify_flag = True
e = [e]
try:
for ei in e:
assert(isinstance(ei, (float, int, long)))
except AssertionError:
self._add_error_message('Expression "%s" is invalid for type real vector.'%str(e))
raise Exception
return e
elif t == 'int_vector':
if not isinstance(e, (tuple, list, set)):
self._lisitify_flag = True
e = [e]
try:
for ei in e:
assert(isinstance(ei, (int, long)))
except AssertionError:
self._add_error_message('Expression "%s" is invalid for type integer vector.'%str(e))
raise Exception
return e
elif t == 'hex':
return hex(e)
else: raise TypeError, 'Type "%s" not handled'%t
#########################
# String Types
#########################
elif t in ('string', 'file_open', 'file_save'):
#do not check if file/directory exists, that is a runtime issue
e = eval_string(v)
return str(e)
#########################
# Unique ID Type
#########################
elif t == 'id':
#can python use this as a variable?
try:
assert(len(v) > 0)
assert(v[0].isalpha())
for c in v: assert(c.isalnum() or c in ('_',))
except AssertionError:
self._add_error_message('ID "%s" must be alpha-numeric or underscored, and begin with a letter.'%v)
raise Exception
params = self.get_all_params('id')
keys = [param.get_value() for param in params]
try: assert(len(keys) == len(set(keys)))
except:
self._add_error_message('ID "%s" is not unique.'%v)
raise Exception
return v
#########################
# Grid Position Type
#########################
elif t == 'grid_pos':
if not v: return '' #allow for empty grid pos
e = self.get_parent().get_parent().evaluate(v)
try:
assert(isinstance(e, (list, tuple)) and len(e) == 4)
for ei in e: assert(isinstance(ei, int))
except AssertionError:
self._add_error_message('A grid position must be a list of 4 integers.')
raise Exception
row, col, row_span, col_span = e
#check row, col
try: assert(row >= 0 and col >= 0)
except AssertionError:
self._add_error_message('Row and column must be non-negative.')
raise Exception
#check row span, col span
try: assert(row_span > 0 and col_span > 0)
except AssertionError:
self._add_error_message('Row and column span must be greater than zero.')
raise Exception
#calculate hostage cells
for r in range(row_span):
for c in range(col_span):
self._hostage_cells.append((row+r, col+c))
#avoid collisions
params = filter(lambda p: p is not self, self.get_all_params('grid_pos'))
for param in params:
for cell in param._hostage_cells:
if cell in self._hostage_cells:
self._add_error_message('Another graphical element is using cell "%s".'%str(cell))
raise Exception
return e
#########################
# Import Type
#########################
elif t == 'import':
n = dict() #new namespace
try: exec v in n
except ImportError:
self._add_error_message('Import "%s" failed.'%v)
raise Exception
except Exception:
self._add_error_message('Bad import syntax: "%s".'%v)
raise Exception
return filter(lambda k: str(k) != '__builtins__', n.keys())
#########################
else: raise TypeError, 'Type "%s" not handled'%t
def to_code(self):
"""!
Convert the value to code.
@return a string representing the code
"""
#run init tasks in evaluate
if not self._init:
try: self.evaluate()
except: pass
self._init = True
v = self.get_value()
t = self.get_type()
if t in ('string', 'file_open', 'file_save'): #string types
if self._stringify_flag:
return '"%s"'%v.replace('"', '\"')
else:
return v
elif t in ('complex_vector', 'real_vector', 'int_vector'): #vector types
if self._lisitify_flag:
return '(%s, )'%v
else:
return '(%s)'%v
else:
return v
def get_all_params(self, type):
"""!
Get all the params from the flowgraph that have the given type.
@param type the specified type
@return a list of params
"""
return sum([filter(lambda p: p.get_type() == type, block.get_params()) for block in self.get_parent().get_parent().get_blocks()], [])
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