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-"""Tools for use in AppleEvent clients and servers:
-conversion between AE types and python types
-
-pack(x) converts a Python object to an AEDesc object
-unpack(desc) does the reverse
-coerce(x, wanted_sample) coerces a python object to another python object
-"""
-
-#
-# This code was originally written by Guido, and modified/extended by Jack
-# to include the various types that were missing. The reference used is
-# Apple Event Registry, chapter 9.
-#
-
-from warnings import warnpy3k
-warnpy3k("In 3.x, the aepack module is removed.", stacklevel=2)
-
-import struct
-import types
-from types import *
-from Carbon import AE
-from Carbon.AppleEvents import *
-import MacOS
-import Carbon.File
-import aetypes
-from aetypes import mkenum, ObjectSpecifier
-
-# These ones seem to be missing from AppleEvents
-# (they're in AERegistry.h)
-
-#typeColorTable = 'clrt'
-#typeDrawingArea = 'cdrw'
-#typePixelMap = 'cpix'
-#typePixelMapMinus = 'tpmm'
-#typeRotation = 'trot'
-#typeTextStyles = 'tsty'
-#typeStyledText = 'STXT'
-#typeAEText = 'tTXT'
-#typeEnumeration = 'enum'
-
-#
-# Some AE types are immedeately coerced into something
-# we like better (and which is equivalent)
-#
-unpacker_coercions = {
- typeComp : typeFloat,
- typeColorTable : typeAEList,
- typeDrawingArea : typeAERecord,
- typeFixed : typeFloat,
- typeExtended : typeFloat,
- typePixelMap : typeAERecord,
- typeRotation : typeAERecord,
- typeStyledText : typeAERecord,
- typeTextStyles : typeAERecord,
-};
-
-#
-# Some python types we need in the packer:
-#
-AEDescType = AE.AEDescType
-try:
- FSSType = Carbon.File.FSSpecType
-except AttributeError:
- class FSSType:
- pass
-FSRefType = Carbon.File.FSRefType
-AliasType = Carbon.File.AliasType
-
-def packkey(ae, key, value):
- if hasattr(key, 'which'):
- keystr = key.which
- elif hasattr(key, 'want'):
- keystr = key.want
- else:
- keystr = key
- ae.AEPutParamDesc(keystr, pack(value))
-
-def pack(x, forcetype = None):
- """Pack a python object into an AE descriptor"""
-
- if forcetype:
- if type(x) is StringType:
- return AE.AECreateDesc(forcetype, x)
- else:
- return pack(x).AECoerceDesc(forcetype)
-
- if x is None:
- return AE.AECreateDesc('null', '')
-
- if isinstance(x, AEDescType):
- return x
- if isinstance(x, FSSType):
- return AE.AECreateDesc('fss ', x.data)
- if isinstance(x, FSRefType):
- return AE.AECreateDesc('fsrf', x.data)
- if isinstance(x, AliasType):
- return AE.AECreateDesc('alis', x.data)
- if isinstance(x, IntType):
- return AE.AECreateDesc('long', struct.pack('l', x))
- if isinstance(x, FloatType):
- return AE.AECreateDesc('doub', struct.pack('d', x))
- if isinstance(x, StringType):
- return AE.AECreateDesc('TEXT', x)
- if isinstance(x, UnicodeType):
- data = x.encode('utf16')
- if data[:2] == '\xfe\xff':
- data = data[2:]
- return AE.AECreateDesc('utxt', data)
- if isinstance(x, ListType):
- list = AE.AECreateList('', 0)
- for item in x:
- list.AEPutDesc(0, pack(item))
- return list
- if isinstance(x, DictionaryType):
- record = AE.AECreateList('', 1)
- for key, value in x.items():
- packkey(record, key, value)
- #record.AEPutParamDesc(key, pack(value))
- return record
- if type(x) == types.ClassType and issubclass(x, ObjectSpecifier):
- # Note: we are getting a class object here, not an instance
- return AE.AECreateDesc('type', x.want)
- if hasattr(x, '__aepack__'):
- return x.__aepack__()
- if hasattr(x, 'which'):
- return AE.AECreateDesc('TEXT', x.which)
- if hasattr(x, 'want'):
- return AE.AECreateDesc('TEXT', x.want)
- return AE.AECreateDesc('TEXT', repr(x)) # Copout
-
-def unpack(desc, formodulename=""):
- """Unpack an AE descriptor to a python object"""
- t = desc.type
-
- if t in unpacker_coercions:
- desc = desc.AECoerceDesc(unpacker_coercions[t])
- t = desc.type # This is a guess by Jack....
-
- if t == typeAEList:
- l = []
- for i in range(desc.AECountItems()):
- keyword, item = desc.AEGetNthDesc(i+1, '****')
- l.append(unpack(item, formodulename))
- return l
- if t == typeAERecord:
- d = {}
- for i in range(desc.AECountItems()):
- keyword, item = desc.AEGetNthDesc(i+1, '****')
- d[keyword] = unpack(item, formodulename)
- return d
- if t == typeAEText:
- record = desc.AECoerceDesc('reco')
- return mkaetext(unpack(record, formodulename))
- if t == typeAlias:
- return Carbon.File.Alias(rawdata=desc.data)
- # typeAppleEvent returned as unknown
- if t == typeBoolean:
- return struct.unpack('b', desc.data)[0]
- if t == typeChar:
- return desc.data
- if t == typeUnicodeText:
- return unicode(desc.data, 'utf16')
- # typeColorTable coerced to typeAEList
- # typeComp coerced to extended
- # typeData returned as unknown
- # typeDrawingArea coerced to typeAERecord
- if t == typeEnumeration:
- return mkenum(desc.data)
- # typeEPS returned as unknown
- if t == typeFalse:
- return 0
- if t == typeFloat:
- data = desc.data
- return struct.unpack('d', data)[0]
- if t == typeFSS:
- return Carbon.File.FSSpec(rawdata=desc.data)
- if t == typeFSRef:
- return Carbon.File.FSRef(rawdata=desc.data)
- if t == typeInsertionLoc:
- record = desc.AECoerceDesc('reco')
- return mkinsertionloc(unpack(record, formodulename))
- # typeInteger equal to typeLongInteger
- if t == typeIntlText:
- script, language = struct.unpack('hh', desc.data[:4])
- return aetypes.IntlText(script, language, desc.data[4:])
- if t == typeIntlWritingCode:
- script, language = struct.unpack('hh', desc.data)
- return aetypes.IntlWritingCode(script, language)
- if t == typeKeyword:
- return mkkeyword(desc.data)
- if t == typeLongInteger:
- return struct.unpack('l', desc.data)[0]
- if t == typeLongDateTime:
- a, b = struct.unpack('lL', desc.data)
- return (long(a) << 32) + b
- if t == typeNull:
- return None
- if t == typeMagnitude:
- v = struct.unpack('l', desc.data)
- if v < 0:
- v = 0x100000000L + v
- return v
- if t == typeObjectSpecifier:
- record = desc.AECoerceDesc('reco')
- # If we have been told the name of the module we are unpacking aedescs for,
- # we can attempt to create the right type of python object from that module.
- if formodulename:
- return mkobjectfrommodule(unpack(record, formodulename), formodulename)
- return mkobject(unpack(record, formodulename))
- # typePict returned as unknown
- # typePixelMap coerced to typeAERecord
- # typePixelMapMinus returned as unknown
- # typeProcessSerialNumber returned as unknown
- if t == typeQDPoint:
- v, h = struct.unpack('hh', desc.data)
- return aetypes.QDPoint(v, h)
- if t == typeQDRectangle:
- v0, h0, v1, h1 = struct.unpack('hhhh', desc.data)
- return aetypes.QDRectangle(v0, h0, v1, h1)
- if t == typeRGBColor:
- r, g, b = struct.unpack('hhh', desc.data)
- return aetypes.RGBColor(r, g, b)
- # typeRotation coerced to typeAERecord
- # typeScrapStyles returned as unknown
- # typeSessionID returned as unknown
- if t == typeShortFloat:
- return struct.unpack('f', desc.data)[0]
- if t == typeShortInteger:
- return struct.unpack('h', desc.data)[0]
- # typeSMFloat identical to typeShortFloat
- # typeSMInt indetical to typeShortInt
- # typeStyledText coerced to typeAERecord
- if t == typeTargetID:
- return mktargetid(desc.data)
- # typeTextStyles coerced to typeAERecord
- # typeTIFF returned as unknown
- if t == typeTrue:
- return 1
- if t == typeType:
- return mktype(desc.data, formodulename)
- #
- # The following are special
- #
- if t == 'rang':
- record = desc.AECoerceDesc('reco')
- return mkrange(unpack(record, formodulename))
- if t == 'cmpd':
- record = desc.AECoerceDesc('reco')
- return mkcomparison(unpack(record, formodulename))
- if t == 'logi':
- record = desc.AECoerceDesc('reco')
- return mklogical(unpack(record, formodulename))
- return mkunknown(desc.type, desc.data)
-
-def coerce(data, egdata):
- """Coerce a python object to another type using the AE coercers"""
- pdata = pack(data)
- pegdata = pack(egdata)
- pdata = pdata.AECoerceDesc(pegdata.type)
- return unpack(pdata)
-
-#
-# Helper routines for unpack
-#
-def mktargetid(data):
- sessionID = getlong(data[:4])
- name = mkppcportrec(data[4:4+72])
- location = mklocationnamerec(data[76:76+36])
- rcvrName = mkppcportrec(data[112:112+72])
- return sessionID, name, location, rcvrName
-
-def mkppcportrec(rec):
- namescript = getword(rec[:2])
- name = getpstr(rec[2:2+33])
- portkind = getword(rec[36:38])
- if portkind == 1:
- ctor = rec[38:42]
- type = rec[42:46]
- identity = (ctor, type)
- else:
- identity = getpstr(rec[38:38+33])
- return namescript, name, portkind, identity
-
-def mklocationnamerec(rec):
- kind = getword(rec[:2])
- stuff = rec[2:]
- if kind == 0: stuff = None
- if kind == 2: stuff = getpstr(stuff)
- return kind, stuff
-
-def mkunknown(type, data):
- return aetypes.Unknown(type, data)
-
-def getpstr(s):
- return s[1:1+ord(s[0])]
-
-def getlong(s):
- return (ord(s[0])<<24) | (ord(s[1])<<16) | (ord(s[2])<<8) | ord(s[3])
-
-def getword(s):
- return (ord(s[0])<<8) | (ord(s[1])<<0)
-
-def mkkeyword(keyword):
- return aetypes.Keyword(keyword)
-
-def mkrange(dict):
- return aetypes.Range(dict['star'], dict['stop'])
-
-def mkcomparison(dict):
- return aetypes.Comparison(dict['obj1'], dict['relo'].enum, dict['obj2'])
-
-def mklogical(dict):
- return aetypes.Logical(dict['logc'], dict['term'])
-
-def mkstyledtext(dict):
- return aetypes.StyledText(dict['ksty'], dict['ktxt'])
-
-def mkaetext(dict):
- return aetypes.AEText(dict[keyAEScriptTag], dict[keyAEStyles], dict[keyAEText])
-
-def mkinsertionloc(dict):
- return aetypes.InsertionLoc(dict[keyAEObject], dict[keyAEPosition])
-
-def mkobject(dict):
- want = dict['want'].type
- form = dict['form'].enum
- seld = dict['seld']
- fr = dict['from']
- if form in ('name', 'indx', 'rang', 'test'):
- if want == 'text': return aetypes.Text(seld, fr)
- if want == 'cha ': return aetypes.Character(seld, fr)
- if want == 'cwor': return aetypes.Word(seld, fr)
- if want == 'clin': return aetypes.Line(seld, fr)
- if want == 'cpar': return aetypes.Paragraph(seld, fr)
- if want == 'cwin': return aetypes.Window(seld, fr)
- if want == 'docu': return aetypes.Document(seld, fr)
- if want == 'file': return aetypes.File(seld, fr)
- if want == 'cins': return aetypes.InsertionPoint(seld, fr)
- if want == 'prop' and form == 'prop' and aetypes.IsType(seld):
- return aetypes.Property(seld.type, fr)
- return aetypes.ObjectSpecifier(want, form, seld, fr)
-
-# Note by Jack: I'm not 100% sure of the following code. This was
-# provided by Donovan Preston, but I wonder whether the assignment
-# to __class__ is safe. Moreover, shouldn't there be a better
-# initializer for the classes in the suites?
-def mkobjectfrommodule(dict, modulename):
- if type(dict['want']) == types.ClassType and issubclass(dict['want'], ObjectSpecifier):
- # The type has already been converted to Python. Convert back:-(
- classtype = dict['want']
- dict['want'] = aetypes.mktype(classtype.want)
- want = dict['want'].type
- module = __import__(modulename)
- codenamemapper = module._classdeclarations
- classtype = codenamemapper.get(want, None)
- newobj = mkobject(dict)
- if classtype:
- assert issubclass(classtype, ObjectSpecifier)
- newobj.__class__ = classtype
- return newobj
-
-def mktype(typecode, modulename=None):
- if modulename:
- module = __import__(modulename)
- codenamemapper = module._classdeclarations
- classtype = codenamemapper.get(typecode, None)
- if classtype:
- return classtype
- return aetypes.mktype(typecode)
generated by cgit v1.2.3 (git 2.39.1) at 2025-06-03 15:56:51 +0000