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"""argvemulator - create sys.argv from OSA events. Used by applets that
want unix-style arguments.
"""
import sys
import traceback
from Carbon import AE
from Carbon.AppleEvents import *
from Carbon import Evt
from Carbon.Events import *
import aetools
class ArgvCollector:
"""A minimal FrameWork.Application-like class"""
def __init__(self):
self.quitting = 0
self.ae_handlers = {}
# Remove the funny -psn_xxx_xxx argument
if len(sys.argv) > 1 and sys.argv[1][:4] == '-psn':
del sys.argv[1]
self.installaehandler('aevt', 'oapp', self.open_app)
self.installaehandler('aevt', 'odoc', self.open_file)
def installaehandler(self, classe, type, callback):
AE.AEInstallEventHandler(classe, type, self.callback_wrapper)
self.ae_handlers[(classe, type)] = callback
def close(self):
for classe, type in self.ae_handlers.keys():
AE.AERemoveEventHandler(classe, type)
def mainloop(self, mask = highLevelEventMask, timeout = 1*60):
stoptime = Evt.TickCount() + timeout
while not self.quitting and Evt.TickCount() < stoptime:
self.dooneevent(mask, timeout)
self.close()
def _quit(self):
self.quitting = 1
def dooneevent(self, mask = highLevelEventMask, timeout = 1*60):
got, event = Evt.WaitNextEvent(mask, timeout)
if got:
self.lowlevelhandler(event)
def lowlevelhandler(self, event):
what, message, when, where, modifiers = event
h, v = where
if what == kHighLevelEvent:
try:
AE.AEProcessAppleEvent(event)
except AE.Error, err:
msg = "High Level Event: %r %r" % (hex(message), hex(h | (v<<16)))
print 'AE error: ', err
print 'in', msg
traceback.print_exc()
return
else:
print "Unhandled event:", event
def callback_wrapper(self, _request, _reply):
_parameters, _attributes = aetools.unpackevent(_request)
_class = _attributes['evcl'].type
_type = _attributes['evid'].type
if self.ae_handlers.has_key((_class, _type)):
_function = self.ae_handlers[(_class, _type)]
elif self.ae_handlers.has_key((_class, '****')):
_function = self.ae_handlers[(_class, '****')]
elif self.ae_handlers.has_key(('****', '****')):
_function = self.ae_handlers[('****', '****')]
else:
raise 'Cannot happen: AE callback without handler', (_class, _type)
# XXXX Do key-to-name mapping here
_parameters['_attributes'] = _attributes
_parameters['_class'] = _class
_parameters['_type'] = _type
if _parameters.has_key('----'):
_object = _parameters['----']
del _parameters['----']
# The try/except that used to be here can mask programmer errors.
# Let the program crash, the programmer can always add a **args
# to the formal parameter list.
rv = _function(_object, **_parameters)
else:
#Same try/except comment as above
rv = _function(**_parameters)
if rv == None:
aetools.packevent(_reply, {})
else:
aetools.packevent(_reply, {'----':rv})
def open_app(self, **args):
self._quit()
def open_file(self, _object=None, **args):
for alias in _object:
fsr = alias.FSResolveAlias(None)[0]
pathname = fsr.as_pathname()
sys.argv.append(pathname)
self._quit()
def other(self, _object=None, _class=None, _type=None, **args):
print 'Ignore AppleEvent', (_class, _type), 'for', _object, 'Other args:', args
if __name__ == '__main__':
ArgvCollector().mainloop()
print "sys.argv=", sys.argv
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