Construct a sys.argv from the initial AppleEvent sent by the finder
during startup of a program. This module will replace the C code in
macgetargv.c so we can get rid of the special macmain.c for OSX
Python.app.
diff --git a/Mac/Lib/argvemulator.py b/Mac/Lib/argvemulator.py
new file mode 100644
index 0000000..032a167
--- /dev/null
+++ b/Mac/Lib/argvemulator.py
@@ -0,0 +1,111 @@
+"""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 = {}
+ self.installaehandler('aevt', 'oapp', self.open_app)
+ self.installaehandler('aevt', 'open', 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: %s %s" % \
+ (`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 = apply(_function, (_object,), _parameters)
+ else:
+ #Same try/except comment as above
+ rv = apply(_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:
+ fss = alias.Resolve()[0]
+ pathname = fss.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