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39c5d666c9
we don't get infinite recursion for suites that don't have an application class. Also got rid of some tabs.
360 lines
11 KiB
Python
360 lines
11 KiB
Python
"""Tools for use in AppleEvent clients and servers.
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pack(x) converts a Python object to an AEDesc object
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unpack(desc) does the reverse
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packevent(event, parameters, attributes) sets params and attrs in an AEAppleEvent record
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unpackevent(event) returns the parameters and attributes from an AEAppleEvent record
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Plus... Lots of classes and routines that help representing AE objects,
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ranges, conditionals, logicals, etc., so you can write, e.g.:
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x = Character(1, Document("foobar"))
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and pack(x) will create an AE object reference equivalent to AppleScript's
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character 1 of document "foobar"
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Some of the stuff that appears to be exported from this module comes from other
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files: the pack stuff from aepack, the objects from aetypes.
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"""
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from types import *
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from Carbon import AE
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from Carbon import Evt
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from Carbon import AppleEvents
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import MacOS
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import sys
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import time
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from aetypes import *
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from aepack import packkey, pack, unpack, coerce, AEDescType
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Error = 'aetools.Error'
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# Amount of time to wait for program to be launched
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LAUNCH_MAX_WAIT_TIME=10
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# Special code to unpack an AppleEvent (which is *not* a disguised record!)
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# Note by Jack: No??!? If I read the docs correctly it *is*....
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aekeywords = [
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'tran',
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'rtid',
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'evcl',
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'evid',
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'addr',
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'optk',
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'timo',
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'inte', # this attribute is read only - will be set in AESend
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'esrc', # this attribute is read only
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'miss', # this attribute is read only
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'from' # new in 1.0.1
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]
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def missed(ae):
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try:
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desc = ae.AEGetAttributeDesc('miss', 'keyw')
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except AE.Error, msg:
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return None
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return desc.data
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def unpackevent(ae, formodulename=""):
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parameters = {}
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try:
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dirobj = ae.AEGetParamDesc('----', '****')
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except AE.Error:
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pass
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else:
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parameters['----'] = unpack(dirobj, formodulename)
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del dirobj
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# Workaround for what I feel is a bug in OSX 10.2: 'errn' won't show up in missed...
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try:
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dirobj = ae.AEGetParamDesc('errn', '****')
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except AE.Error:
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pass
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else:
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parameters['errn'] = unpack(dirobj, formodulename)
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del dirobj
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while 1:
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key = missed(ae)
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if not key: break
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parameters[key] = unpack(ae.AEGetParamDesc(key, '****'), formodulename)
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attributes = {}
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for key in aekeywords:
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try:
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desc = ae.AEGetAttributeDesc(key, '****')
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except (AE.Error, MacOS.Error), msg:
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if msg[0] != -1701 and msg[0] != -1704:
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raise
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continue
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attributes[key] = unpack(desc, formodulename)
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return parameters, attributes
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def packevent(ae, parameters = {}, attributes = {}):
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for key, value in parameters.items():
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packkey(ae, key, value)
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for key, value in attributes.items():
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ae.AEPutAttributeDesc(key, pack(value))
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#
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# Support routine for automatically generated Suite interfaces
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# These routines are also useable for the reverse function.
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#
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def keysubst(arguments, keydict):
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"""Replace long name keys by their 4-char counterparts, and check"""
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ok = keydict.values()
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for k in arguments.keys():
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if keydict.has_key(k):
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v = arguments[k]
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del arguments[k]
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arguments[keydict[k]] = v
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elif k != '----' and k not in ok:
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raise TypeError, 'Unknown keyword argument: %s'%k
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def enumsubst(arguments, key, edict):
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"""Substitute a single enum keyword argument, if it occurs"""
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if not arguments.has_key(key) or edict is None:
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return
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v = arguments[key]
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ok = edict.values()
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if edict.has_key(v):
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arguments[key] = Enum(edict[v])
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elif not v in ok:
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raise TypeError, 'Unknown enumerator: %s'%v
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def decodeerror(arguments):
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"""Create the 'best' argument for a raise MacOS.Error"""
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errn = arguments['errn']
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err_a1 = errn
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if arguments.has_key('errs'):
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err_a2 = arguments['errs']
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else:
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err_a2 = MacOS.GetErrorString(errn)
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if arguments.has_key('erob'):
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err_a3 = arguments['erob']
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else:
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err_a3 = None
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return (err_a1, err_a2, err_a3)
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class TalkTo:
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"""An AE connection to an application"""
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_signature = None # Can be overridden by subclasses
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_moduleName = None # Can be overridden by subclasses
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_elemdict = {} # Can be overridden by subclasses
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_propdict = {} # Can be overridden by subclasses
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__eventloop_initialized = 0
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def __ensure_WMAvailable(klass):
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if klass.__eventloop_initialized: return 1
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if not MacOS.WMAvailable(): return 0
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# Workaround for a but in MacOSX 10.2: we must have an event
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# loop before we can call AESend.
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Evt.WaitNextEvent(0,0)
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return 1
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__ensure_WMAvailable = classmethod(__ensure_WMAvailable)
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def __init__(self, signature=None, start=0, timeout=0):
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"""Create a communication channel with a particular application.
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Addressing the application is done by specifying either a
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4-byte signature, an AEDesc or an object that will __aepack__
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to an AEDesc.
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"""
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self.target_signature = None
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if signature is None:
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signature = self._signature
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if type(signature) == AEDescType:
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self.target = signature
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elif type(signature) == InstanceType and hasattr(signature, '__aepack__'):
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self.target = signature.__aepack__()
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elif type(signature) == StringType and len(signature) == 4:
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self.target = AE.AECreateDesc(AppleEvents.typeApplSignature, signature)
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self.target_signature = signature
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else:
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raise TypeError, "signature should be 4-char string or AEDesc"
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self.send_flags = AppleEvents.kAEWaitReply
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self.send_priority = AppleEvents.kAENormalPriority
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if timeout:
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self.send_timeout = timeout
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else:
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self.send_timeout = AppleEvents.kAEDefaultTimeout
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if start:
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self._start()
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def _start(self):
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"""Start the application, if it is not running yet"""
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try:
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self.send('ascr', 'noop')
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except AE.Error:
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_launch(self.target_signature)
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for i in range(LAUNCH_MAX_WAIT_TIME):
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try:
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self.send('ascr', 'noop')
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except AE.Error:
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pass
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else:
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break
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time.sleep(1)
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def start(self):
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"""Deprecated, used _start()"""
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self._start()
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def newevent(self, code, subcode, parameters = {}, attributes = {}):
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"""Create a complete structure for an apple event"""
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event = AE.AECreateAppleEvent(code, subcode, self.target,
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AppleEvents.kAutoGenerateReturnID, AppleEvents.kAnyTransactionID)
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packevent(event, parameters, attributes)
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return event
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def sendevent(self, event):
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"""Send a pre-created appleevent, await the reply and unpack it"""
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if not self.__ensure_WMAvailable():
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raise RuntimeError, "No window manager access, cannot send AppleEvent"
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reply = event.AESend(self.send_flags, self.send_priority,
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self.send_timeout)
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parameters, attributes = unpackevent(reply, self._moduleName)
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return reply, parameters, attributes
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def send(self, code, subcode, parameters = {}, attributes = {}):
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"""Send an appleevent given code/subcode/pars/attrs and unpack the reply"""
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return self.sendevent(self.newevent(code, subcode, parameters, attributes))
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#
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# The following events are somehow "standard" and don't seem to appear in any
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# suite...
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#
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def activate(self):
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"""Send 'activate' command"""
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self.send('misc', 'actv')
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def _get(self, _object, as=None, _attributes={}):
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"""_get: get data from an object
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Required argument: the object
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Keyword argument _attributes: AppleEvent attribute dictionary
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Returns: the data
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"""
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_code = 'core'
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_subcode = 'getd'
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_arguments = {'----':_object}
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if as:
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_arguments['rtyp'] = mktype(as)
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_reply, _arguments, _attributes = self.send(_code, _subcode,
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_arguments, _attributes)
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if _arguments.has_key('errn'):
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raise Error, decodeerror(_arguments)
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if _arguments.has_key('----'):
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return _arguments['----']
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if as:
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item.__class__ = as
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return item
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get = _get
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_argmap_set = {
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'to' : 'data',
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}
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def _set(self, _object, _attributes={}, **_arguments):
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"""set: Set an object's data.
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Required argument: the object for the command
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Keyword argument to: The new value.
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Keyword argument _attributes: AppleEvent attribute dictionary
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"""
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_code = 'core'
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_subcode = 'setd'
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keysubst(_arguments, self._argmap_set)
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_arguments['----'] = _object
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_reply, _arguments, _attributes = self.send(_code, _subcode,
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_arguments, _attributes)
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if _arguments.get('errn', 0):
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raise Error, decodeerror(_arguments)
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# XXXX Optionally decode result
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if _arguments.has_key('----'):
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return _arguments['----']
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set = _set
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# Magic glue to allow suite-generated classes to function somewhat
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# like the "application" class in OSA.
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def __getattr__(self, name):
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if self._elemdict.has_key(name):
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cls = self._elemdict[name]
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return DelayedComponentItem(cls, None)
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if self._propdict.has_key(name):
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cls = self._propdict[name]
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return cls()
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raise AttributeError, name
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# Tiny Finder class, for local use only
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class _miniFinder(TalkTo):
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def open(self, _object, _attributes={}, **_arguments):
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"""open: Open the specified object(s)
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Required argument: list of objects to open
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Keyword argument _attributes: AppleEvent attribute dictionary
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"""
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_code = 'aevt'
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_subcode = 'odoc'
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if _arguments: raise TypeError, 'No optional args expected'
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_arguments['----'] = _object
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_reply, _arguments, _attributes = self.send(_code, _subcode,
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_arguments, _attributes)
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if _arguments.has_key('errn'):
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raise Error, decodeerror(_arguments)
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# XXXX Optionally decode result
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if _arguments.has_key('----'):
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return _arguments['----']
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#pass
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_finder = _miniFinder('MACS')
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def _launch(appfile):
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"""Open a file thru the finder. Specify file by name or fsspec"""
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_finder.open(_application_file(('ID ', appfile)))
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class _application_file(ComponentItem):
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"""application file - An application's file on disk"""
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want = 'appf'
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_application_file._propdict = {
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}
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_application_file._elemdict = {
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}
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# Test program
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# XXXX Should test more, really...
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def test():
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target = AE.AECreateDesc('sign', 'quil')
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ae = AE.AECreateAppleEvent('aevt', 'oapp', target, -1, 0)
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print unpackevent(ae)
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raw_input(":")
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ae = AE.AECreateAppleEvent('core', 'getd', target, -1, 0)
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obj = Character(2, Word(1, Document(1)))
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print obj
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print repr(obj)
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packevent(ae, {'----': obj})
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params, attrs = unpackevent(ae)
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print params['----']
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raw_input(":")
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if __name__ == '__main__':
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test()
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sys.exit(1)
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