mirror of https://github.com/python/cpython.git
348 lines
9.4 KiB
Python
348 lines
9.4 KiB
Python
"""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.
|
|
#
|
|
|
|
import struct
|
|
import string
|
|
import types
|
|
from string import strip
|
|
from types import *
|
|
from Carbon import AE
|
|
from Carbon.AppleEvents import *
|
|
import MacOS
|
|
import macfs
|
|
import StringIO
|
|
import aetypes
|
|
from aetypes import mkenum, mktype
|
|
|
|
# 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 = type(AE.AECreateDesc('TEXT', ''))
|
|
_sample_fss = macfs.FSSpec(':')
|
|
_sample_alias = _sample_fss.NewAliasMinimal()
|
|
FSSType = type(_sample_fss)
|
|
AliasType = type(_sample_alias)
|
|
|
|
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 == None:
|
|
return AE.AECreateDesc('null', '')
|
|
|
|
t = type(x)
|
|
if t == AEDescType:
|
|
return x
|
|
if t == FSSType:
|
|
return AE.AECreateDesc('fss ', x.data)
|
|
if t == AliasType:
|
|
return AE.AECreateDesc('alis', x.data)
|
|
if t == IntType:
|
|
return AE.AECreateDesc('long', struct.pack('l', x))
|
|
if t == FloatType:
|
|
return AE.AECreateDesc('doub', struct.pack('d', x))
|
|
if t == StringType:
|
|
return AE.AECreateDesc('TEXT', x)
|
|
if t == ListType:
|
|
list = AE.AECreateList('', 0)
|
|
for item in x:
|
|
list.AEPutDesc(0, pack(item))
|
|
return list
|
|
if t == DictionaryType:
|
|
record = AE.AECreateList('', 1)
|
|
for key, value in x.items():
|
|
record.AEPutParamDesc(key, pack(value))
|
|
return record
|
|
if t == InstanceType and hasattr(x, '__aepack__'):
|
|
return x.__aepack__()
|
|
return AE.AECreateDesc('TEXT', repr(x)) # Copout
|
|
|
|
def unpack(desc):
|
|
"""Unpack an AE descriptor to a python object"""
|
|
t = desc.type
|
|
|
|
if unpacker_coercions.has_key(t):
|
|
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))
|
|
return l
|
|
if t == typeAERecord:
|
|
d = {}
|
|
for i in range(desc.AECountItems()):
|
|
keyword, item = desc.AEGetNthDesc(i+1, '****')
|
|
d[keyword] = unpack(item)
|
|
return d
|
|
if t == typeAEText:
|
|
record = desc.AECoerceDesc('reco')
|
|
return mkaetext(unpack(record))
|
|
if t == typeAlias:
|
|
return macfs.RawAlias(desc.data)
|
|
# typeAppleEvent returned as unknown
|
|
if t == typeBoolean:
|
|
return struct.unpack('b', desc.data)[0]
|
|
if t == typeChar:
|
|
return desc.data
|
|
# 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 macfs.RawFSSpec(desc.data)
|
|
if t == typeInsertionLoc:
|
|
record = desc.AECoerceDesc('reco')
|
|
return mkinsertionloc(unpack(record))
|
|
# 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')
|
|
return mkobject(unpack(record))
|
|
# 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)
|
|
#
|
|
# The following are special
|
|
#
|
|
if t == 'rang':
|
|
record = desc.AECoerceDesc('reco')
|
|
return mkrange(unpack(record))
|
|
if t == 'cmpd':
|
|
record = desc.AECoerceDesc('reco')
|
|
return mkcomparison(unpack(record))
|
|
if t == 'logi':
|
|
record = desc.AECoerceDesc('reco')
|
|
return mklogical(unpack(record))
|
|
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)
|
|
|
|
def _test():
|
|
"""Test program. Pack and unpack various things"""
|
|
objs = [
|
|
'a string',
|
|
12,
|
|
12.0,
|
|
None,
|
|
['a', 'list', 'of', 'strings'],
|
|
{'key1': 'value1', 'key2':'value2'},
|
|
macfs.FSSpec(':'),
|
|
macfs.FSSpec(':').NewAliasMinimal(),
|
|
aetypes.Enum('enum'),
|
|
aetypes.Type('type'),
|
|
aetypes.Keyword('kwrd'),
|
|
aetypes.Range(1, 10),
|
|
aetypes.Comparison(1, '< ', 10),
|
|
aetypes.Logical('not ', 1),
|
|
# Cannot do StyledText
|
|
# Cannot do AEText
|
|
aetypes.IntlText(0, 0, 'international text'),
|
|
aetypes.IntlWritingCode(0,0),
|
|
aetypes.QDPoint(50,100),
|
|
aetypes.QDRectangle(50,100,150,200),
|
|
aetypes.RGBColor(0x7000, 0x6000, 0x5000),
|
|
aetypes.Unknown('xxxx', 'unknown type data'),
|
|
aetypes.Character(1),
|
|
aetypes.Character(2, aetypes.Line(2)),
|
|
]
|
|
for o in objs:
|
|
print 'BEFORE', o, `o`
|
|
packed = pack(o)
|
|
unpacked = unpack(packed)
|
|
print 'AFTER ', unpacked, `unpacked`
|
|
import sys
|
|
sys.exit(1)
|
|
|
|
if __name__ == '__main__':
|
|
_test()
|
|
|