| """Tools for use in AppleEvent clients and servers. |
| |
| pack(x) converts a Python object to an AEDesc object |
| unpack(desc) does the reverse |
| |
| packevent(event, parameters, attributes) sets params and attrs in an AEAppleEvent record |
| unpackevent(event) returns the parameters and attributes from an AEAppleEvent record |
| |
| Plus... Lots of classes and routines that help representing AE objects, |
| ranges, conditionals, logicals, etc., so you can write, e.g.: |
| |
| x = Character(1, Document("foobar")) |
| |
| and pack(x) will create an AE object reference equivalent to AppleScript's |
| |
| character 1 of document "foobar" |
| |
| Some of the stuff that appears to be exported from this module comes from other |
| files: the pack stuff from aepack, the objects from aetypes. |
| |
| """ |
| |
| |
| from warnings import warnpy3k |
| warnpy3k("In 3.x, the aetools module is removed.", stacklevel=2) |
| |
| from types import * |
| from Carbon import AE |
| from Carbon import Evt |
| from Carbon import AppleEvents |
| import MacOS |
| import sys |
| import time |
| |
| from aetypes import * |
| from aepack import packkey, pack, unpack, coerce, AEDescType |
| |
| Error = 'aetools.Error' |
| |
| # Amount of time to wait for program to be launched |
| LAUNCH_MAX_WAIT_TIME=10 |
| |
| # Special code to unpack an AppleEvent (which is *not* a disguised record!) |
| # Note by Jack: No??!? If I read the docs correctly it *is*.... |
| |
| aekeywords = [ |
| 'tran', |
| 'rtid', |
| 'evcl', |
| 'evid', |
| 'addr', |
| 'optk', |
| 'timo', |
| 'inte', # this attribute is read only - will be set in AESend |
| 'esrc', # this attribute is read only |
| 'miss', # this attribute is read only |
| 'from' # new in 1.0.1 |
| ] |
| |
| def missed(ae): |
| try: |
| desc = ae.AEGetAttributeDesc('miss', 'keyw') |
| except AE.Error, msg: |
| return None |
| return desc.data |
| |
| def unpackevent(ae, formodulename=""): |
| parameters = {} |
| try: |
| dirobj = ae.AEGetParamDesc('----', '****') |
| except AE.Error: |
| pass |
| else: |
| parameters['----'] = unpack(dirobj, formodulename) |
| del dirobj |
| # Workaround for what I feel is a bug in OSX 10.2: 'errn' won't show up in missed... |
| try: |
| dirobj = ae.AEGetParamDesc('errn', '****') |
| except AE.Error: |
| pass |
| else: |
| parameters['errn'] = unpack(dirobj, formodulename) |
| del dirobj |
| while 1: |
| key = missed(ae) |
| if not key: break |
| parameters[key] = unpack(ae.AEGetParamDesc(key, '****'), formodulename) |
| attributes = {} |
| for key in aekeywords: |
| try: |
| desc = ae.AEGetAttributeDesc(key, '****') |
| except (AE.Error, MacOS.Error), msg: |
| if msg[0] != -1701 and msg[0] != -1704: |
| raise |
| continue |
| attributes[key] = unpack(desc, formodulename) |
| return parameters, attributes |
| |
| def packevent(ae, parameters = {}, attributes = {}): |
| for key, value in parameters.items(): |
| packkey(ae, key, value) |
| for key, value in attributes.items(): |
| ae.AEPutAttributeDesc(key, pack(value)) |
| |
| # |
| # Support routine for automatically generated Suite interfaces |
| # These routines are also useable for the reverse function. |
| # |
| def keysubst(arguments, keydict): |
| """Replace long name keys by their 4-char counterparts, and check""" |
| ok = keydict.values() |
| for k in arguments.keys(): |
| if k in keydict: |
| v = arguments[k] |
| del arguments[k] |
| arguments[keydict[k]] = v |
| elif k != '----' and k not in ok: |
| raise TypeError, 'Unknown keyword argument: %s'%k |
| |
| def enumsubst(arguments, key, edict): |
| """Substitute a single enum keyword argument, if it occurs""" |
| if key not in arguments or edict is None: |
| return |
| v = arguments[key] |
| ok = edict.values() |
| if v in edict: |
| arguments[key] = Enum(edict[v]) |
| elif not v in ok: |
| raise TypeError, 'Unknown enumerator: %s'%v |
| |
| def decodeerror(arguments): |
| """Create the 'best' argument for a raise MacOS.Error""" |
| errn = arguments['errn'] |
| err_a1 = errn |
| if 'errs' in arguments: |
| err_a2 = arguments['errs'] |
| else: |
| err_a2 = MacOS.GetErrorString(errn) |
| if 'erob' in arguments: |
| err_a3 = arguments['erob'] |
| else: |
| err_a3 = None |
| |
| return (err_a1, err_a2, err_a3) |
| |
| class TalkTo: |
| """An AE connection to an application""" |
| _signature = None # Can be overridden by subclasses |
| _moduleName = None # Can be overridden by subclasses |
| _elemdict = {} # Can be overridden by subclasses |
| _propdict = {} # Can be overridden by subclasses |
| |
| __eventloop_initialized = 0 |
| def __ensure_WMAvailable(klass): |
| if klass.__eventloop_initialized: return 1 |
| if not MacOS.WMAvailable(): return 0 |
| # Workaround for a but in MacOSX 10.2: we must have an event |
| # loop before we can call AESend. |
| Evt.WaitNextEvent(0,0) |
| return 1 |
| __ensure_WMAvailable = classmethod(__ensure_WMAvailable) |
| |
| def __init__(self, signature=None, start=0, timeout=0): |
| """Create a communication channel with a particular application. |
| |
| Addressing the application is done by specifying either a |
| 4-byte signature, an AEDesc or an object that will __aepack__ |
| to an AEDesc. |
| """ |
| self.target_signature = None |
| if signature is None: |
| signature = self._signature |
| if type(signature) == AEDescType: |
| self.target = signature |
| elif type(signature) == InstanceType and hasattr(signature, '__aepack__'): |
| self.target = signature.__aepack__() |
| elif type(signature) == StringType and len(signature) == 4: |
| self.target = AE.AECreateDesc(AppleEvents.typeApplSignature, signature) |
| self.target_signature = signature |
| else: |
| raise TypeError, "signature should be 4-char string or AEDesc" |
| self.send_flags = AppleEvents.kAEWaitReply |
| self.send_priority = AppleEvents.kAENormalPriority |
| if timeout: |
| self.send_timeout = timeout |
| else: |
| self.send_timeout = AppleEvents.kAEDefaultTimeout |
| if start: |
| self._start() |
| |
| def _start(self): |
| """Start the application, if it is not running yet""" |
| try: |
| self.send('ascr', 'noop') |
| except AE.Error: |
| _launch(self.target_signature) |
| for i in range(LAUNCH_MAX_WAIT_TIME): |
| try: |
| self.send('ascr', 'noop') |
| except AE.Error: |
| pass |
| else: |
| break |
| time.sleep(1) |
| |
| def start(self): |
| """Deprecated, used _start()""" |
| self._start() |
| |
| def newevent(self, code, subcode, parameters = {}, attributes = {}): |
| """Create a complete structure for an apple event""" |
| |
| event = AE.AECreateAppleEvent(code, subcode, self.target, |
| AppleEvents.kAutoGenerateReturnID, AppleEvents.kAnyTransactionID) |
| packevent(event, parameters, attributes) |
| return event |
| |
| def sendevent(self, event): |
| """Send a pre-created appleevent, await the reply and unpack it""" |
| if not self.__ensure_WMAvailable(): |
| raise RuntimeError, "No window manager access, cannot send AppleEvent" |
| reply = event.AESend(self.send_flags, self.send_priority, |
| self.send_timeout) |
| parameters, attributes = unpackevent(reply, self._moduleName) |
| return reply, parameters, attributes |
| |
| def send(self, code, subcode, parameters = {}, attributes = {}): |
| """Send an appleevent given code/subcode/pars/attrs and unpack the reply""" |
| return self.sendevent(self.newevent(code, subcode, parameters, attributes)) |
| |
| # |
| # The following events are somehow "standard" and don't seem to appear in any |
| # suite... |
| # |
| def activate(self): |
| """Send 'activate' command""" |
| self.send('misc', 'actv') |
| |
| def _get(self, _object, asfile=None, _attributes={}): |
| """_get: get data from an object |
| Required argument: the object |
| Keyword argument _attributes: AppleEvent attribute dictionary |
| Returns: the data |
| """ |
| _code = 'core' |
| _subcode = 'getd' |
| |
| _arguments = {'----':_object} |
| if asfile: |
| _arguments['rtyp'] = mktype(asfile) |
| |
| _reply, _arguments, _attributes = self.send(_code, _subcode, |
| _arguments, _attributes) |
| if 'errn' in _arguments: |
| raise Error, decodeerror(_arguments) |
| |
| if '----' in _arguments: |
| return _arguments['----'] |
| if asfile: |
| item.__class__ = asfile |
| return item |
| |
| get = _get |
| |
| _argmap_set = { |
| 'to' : 'data', |
| } |
| |
| def _set(self, _object, _attributes={}, **_arguments): |
| """set: Set an object's data. |
| Required argument: the object for the command |
| Keyword argument to: The new value. |
| Keyword argument _attributes: AppleEvent attribute dictionary |
| """ |
| _code = 'core' |
| _subcode = 'setd' |
| |
| keysubst(_arguments, self._argmap_set) |
| _arguments['----'] = _object |
| |
| |
| _reply, _arguments, _attributes = self.send(_code, _subcode, |
| _arguments, _attributes) |
| if _arguments.get('errn', 0): |
| raise Error, decodeerror(_arguments) |
| # XXXX Optionally decode result |
| if '----' in _arguments: |
| return _arguments['----'] |
| |
| set = _set |
| |
| # Magic glue to allow suite-generated classes to function somewhat |
| # like the "application" class in OSA. |
| |
| def __getattr__(self, name): |
| if name in self._elemdict: |
| cls = self._elemdict[name] |
| return DelayedComponentItem(cls, None) |
| if name in self._propdict: |
| cls = self._propdict[name] |
| return cls() |
| raise AttributeError, name |
| |
| # Tiny Finder class, for local use only |
| |
| class _miniFinder(TalkTo): |
| def open(self, _object, _attributes={}, **_arguments): |
| """open: Open the specified object(s) |
| Required argument: list of objects to open |
| Keyword argument _attributes: AppleEvent attribute dictionary |
| """ |
| _code = 'aevt' |
| _subcode = 'odoc' |
| |
| if _arguments: raise TypeError, 'No optional args expected' |
| _arguments['----'] = _object |
| |
| |
| _reply, _arguments, _attributes = self.send(_code, _subcode, |
| _arguments, _attributes) |
| if 'errn' in _arguments: |
| raise Error, decodeerror(_arguments) |
| # XXXX Optionally decode result |
| if '----' in _arguments: |
| return _arguments['----'] |
| #pass |
| |
| _finder = _miniFinder('MACS') |
| |
| def _launch(appfile): |
| """Open a file thru the finder. Specify file by name or fsspec""" |
| _finder.open(_application_file(('ID ', appfile))) |
| |
| |
| class _application_file(ComponentItem): |
| """application file - An application's file on disk""" |
| want = 'appf' |
| |
| _application_file._propdict = { |
| } |
| _application_file._elemdict = { |
| } |
| |
| # Test program |
| # XXXX Should test more, really... |
| |
| def test(): |
| target = AE.AECreateDesc('sign', 'quil') |
| ae = AE.AECreateAppleEvent('aevt', 'oapp', target, -1, 0) |
| print unpackevent(ae) |
| raw_input(":") |
| ae = AE.AECreateAppleEvent('core', 'getd', target, -1, 0) |
| obj = Character(2, Word(1, Document(1))) |
| print obj |
| print repr(obj) |
| packevent(ae, {'----': obj}) |
| params, attrs = unpackevent(ae) |
| print params['----'] |
| raw_input(":") |
| |
| if __name__ == '__main__': |
| test() |
| sys.exit(1) |