more support for different kinds of objects

Mac/Lib/test/echo.py

+"""'echo' -- an AppleEvent handler which handles all events the same.
+
+It replies to each event by echoing the parameter back to the client.
+This is a good way to find out how the Script Editor formats AppleEvents,
+especially to figure out all the different forms an object specifier
+can have (without having to rely on Apple's implementation).
+"""
+
+import AE
+from AppleEvents import *
+import Evt
+from Events import *
+import aetools
+import sys
+import MacOS
+import traceback
+
+kHighLevelEvent = 23				# Not defined anywhere for Python yet?
+
+
+def main():
+	echo = EchoServer()
+	MacOS.EnableAppswitch(0)		# Disable Python's own "event handling"
+	try:
+		echo.mainloop()
+	finally:
+		MacOS.EnableAppswitch(1)	# Let Python have a go at events
+		echo.close()
+
+
+class EchoServer:
+	
+	suites = ['aevt', 'core']
+	
+	def __init__(self):
+		self.active = 0
+		for suite in self.suites:
+			AE.AEInstallEventHandler(suite, typeWildCard, self.aehandler)
+		self.active = 1
+	
+	def __del__(self):
+		self.close()
+	
+	def close(self):
+		if self.active:
+			self.active = 0
+			for suite in self.suites:
+				AE.AERemoveEventHandler(suite, typeWildCard)
+	
+	def mainloop(self, mask = everyEvent, timeout = 60*60):
+		while 1:
+			got, event = Evt.WaitNextEvent(mask, timeout)
+			if got:
+				self.lowlevelhandler(event)
+	
+	def lowlevelhandler(self, event):
+		what, message, when, (h, v), modifiers = event
+		if what == kHighLevelEvent:
+			print "High Level Event:", `code(message)`, `code(h | (v<<16))`
+			try:
+				AE.AEProcessAppleEvent(event)
+			except AE.Error, msg:
+				print "AEProcessAppleEvent error:"
+				traceback.print_exc()
+		elif what == keyDown:
+			c = chr(message & charCodeMask)
+			if c == '.' and modifiers & cmdKey:
+				raise KeyboardInterrupt, "Command-period"
+			MacOS.HandleEvent(event)
+		elif what <> autoKey:
+			print "Event:", (eventname(what), message, when, (h, v), modifiers)
+			MacOS.HandleEvent(event)
+	
+	def aehandler(self, request, reply):
+		print "Apple Event",
+		parameters, attributes = aetools.unpackevent(request)
+		print "class =", `attributes['evcl'].type`,
+		print "id =", `attributes['evid'].type`
+		print "Parameters:"
+		keys = parameters.keys()
+		keys.sort()
+		for key in keys:
+			print "%s: %.150s" % (`key`, `parameters[key]`)
+			print "      :", str(parameters[key])
+		print "Attributes:"
+		keys = attributes.keys()
+		keys.sort()
+		for key in keys:
+			print "%s: %.150s" % (`key`, `attributes[key]`)
+		aetools.packevent(reply, parameters)
+
+
+_eventnames = {
+	keyDown: 'keyDown',
+	autoKey: 'autoKey',
+	mouseDown: 'mouseDown',
+	mouseUp: 'mouseUp',
+	updateEvt: 'updateEvt',
+	diskEvt: 'diskEvt',
+	activateEvt: 'activateEvt',
+	osEvt: 'osEvt',
+}
+
+def eventname(what):
+	if _eventnames.has_key(what): return _eventnames[what]
+	else: return `what`
+
+def code(x):
+	"Convert a long int to the 4-character code it really is"
+	s = ''
+	for i in range(4):
+		x, c = divmod(x, 256)
+		s = chr(c) + s
+	return s
+
+
+if __name__ == '__main__':
+	main()
+else: main()