def __init__(self): # Clients may add/remove/replace encoder and decoder items: self.encoders = encoders.copy() self.decoders = decoders.copy() self._unittypecodecs = UnitTypeCodecs()
def __init__(self):
# Clients may add/remove/replace encoder and decoder items:
self.encoders = encoders.copy()
self.decoders = decoders.copy()
self._unittypecodecs = UnitTypeCodecs()
class Codecs:
"""Convert between Python and Apple event data types.
Clients may add additional encoders/decoders and/or subclass to suit their needs.
"""
# These 3 attributes are used by unpackspecifier to construct object specifiers; may be overridden in Codecs subclasses:
app = app
con = con
its = its
def __init__(self):
# Clients may add/remove/replace encoder and decoder items:
self.encoders = encoders.copy()
self.decoders = decoders.copy()
self._unittypecodecs = UnitTypeCodecs()
##
def addunittypes(self, typedefs):
"""Register custom unit type definitions with this Codecs instance
e.g. Adobe apps define additional unit types (ciceros, pixels, etc.)
"""
self._unittypecodecs.addtypes(typedefs)
##
def packunknown(self, data):
"""Clients may override this to provide additional packers."""
raise TypeError, "Can't pack data into an AEDesc (unsupported type): %r" % data
def unpackunknown(self, desc):
"""Clients may override this to provide additional unpackers."""
if desc.AECheckIsRecord():
rec = desc.AECoerceDesc('reco')
rec.AEPutParamDesc('pcls', self.pack(AEType(desc.type)))
decoder = self.decoders.get('reco')
if decoder:
return decoder(rec, self)
else:
return rec
else:
return desc
##
def pack(self, data):
"""Pack Python data.
data : anything -- a Python value
Result : CarbonX.AE.AEDesc -- an Apple event descriptor, or error if no encoder exists for this type of data
"""
if isinstance(data, (Specifier, Test)):
return data.AEM_packSelf(self)
else:
try:
return self.encoders[data.__class__](data, self) # quick lookup by type/class
except (KeyError, AttributeError):
for type, encoder in self.encoders.items(): # slower but more thorough lookup that can handle subtypes/subclasses
if isinstance(data, type):
return encoder(data, self)
didpack, desc = self._unittypecodecs.pack(data)
if didpack:
return desc
else:
self.packunknown(data)
def unpack(self, desc):
"""Unpack an Apple event descriptor.
desc : CarbonX.AE.AEDesc -- an Apple event descriptor
Result : anything -- a Python value, or the AEDesc object if no decoder is found
"""
decoder = self.decoders.get(desc.type)
if decoder:
return decoder(desc, self)
else:
didunpack, val = self._unittypecodecs.unpack(desc)
if didunpack:
return val
else:
return self.unpackunknown(desc)
class Codecs:
"""Convert between Python and Apple event data types.
Clients may add additional encoders/decoders and/or subclass to suit their needs.
"""
# These 3 attributes are used by unpackspecifier to construct object specifiers; may be overridden in Codecs subclasses:
app = app
con = con
its = its
def __init__(self):
# Clients may add/remove/replace encoder and decoder items:
self.encoders = encoders.copy()
self.decoders = decoders.copy()
self._unittypecodecs = UnitTypeCodecs()
##
def addunittypes(self, typedefs):
"""Register custom unit type definitions with this Codecs instance
e.g. Adobe apps define additional unit types (ciceros, pixels, etc.)
"""
self._unittypecodecs.addtypes(typedefs)
##
def packunknown(self, data):
"""Clients may override this to provide additional packers."""
raise TypeError, "Can't pack data into an AEDesc (unsupported type): %r" % data
def unpackunknown(self, desc):
"""Clients may override this to provide additional unpackers."""
if desc.AECheckIsRecord():
rec = desc.AECoerceDesc('reco')
rec.AEPutParamDesc('pcls', self.pack(AEType(desc.type)))
return self.unpack(rec)
else:
return desc
##
def pack(self, data):
"""Pack Python data.
data : anything -- a Python value
Result : CarbonX.AE.AEDesc -- an Apple event descriptor, or error if no encoder exists for this type of data
"""
if isinstance(data, (Specifier, Test)):
return data.AEM_packSelf(self)
else:
try:
return self.encoders[data.__class__](
data, self) # quick lookup by type/class
except (KeyError, AttributeError):
for type, encoder in self.encoders.items(
): # slower but more thorough lookup that can handle subtypes/subclasses
if isinstance(data, type):
return encoder(data, self)
didpack, desc = self._unittypecodecs.pack(data)
if didpack:
return desc
else:
self.packunknown(data)
def unpack(self, desc):
"""Unpack an Apple event descriptor.
desc : CarbonX.AE.AEDesc -- an Apple event descriptor
Result : anything -- a Python value, or the AEDesc object if no decoder is found
"""
decoder = self.decoders.get(desc.type)
if decoder:
return decoder(desc, self)
else:
didunpack, val = self._unittypecodecs.unpack(desc)
if didunpack:
return val
else:
return self.unpackunknown(desc)
