giscanner/ast.py

   1 # -*- Mode: Python -*-
   2 # GObject-Introspection - a framework for introspecting GObject libraries
   3 # Copyright (C) 2008  Johan Dahlin
   4 # Copyright (C) 2008, 2009 Red Hat, Inc.
   5 #
   6 # This library is free software; you can redistribute it and/or
   7 # modify it under the terms of the GNU Lesser General Public
   8 # License as published by the Free Software Foundation; either
   9 # version 2 of the License, or (at your option) any later version.
  10 #
  11 # This library is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 # Lesser General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU Lesser General Public
  17 # License along with this library; if not, write to the
  18 # Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19 # Boston, MA 02111-1307, USA.
  20 #
  21
  22 import copy
  23
  24 from .message import Position
  25 from .odict import odict
  26 from .utils import to_underscores
  27
  28 class Type(object):
  29     """A Type can be either:
  30 * A reference to a node (target_giname)
  31 * A reference to a "fundamental" type like 'utf8'
  32 * A "foreign" type - this can be any string."
  33 If none are specified, then it's in an "unresolved" state.  An
  34 unresolved type can have two data sources; a "ctype" which comes
  35 from a C type string, or a gtype_name (from g_type_name()).
  36 """ # '''
  37
  38     def __init__(self,
  39                  ctype=None,
  40                  gtype_name=None,
  41                  target_fundamental=None,
  42                  target_giname=None,
  43                  target_foreign=None,
  44                  _target_unknown=False,
  45                  is_const=False,
  46                  origin_symbol=None):
  47         self.ctype = ctype
  48         self.gtype_name = gtype_name
  49         self.origin_symbol = origin_symbol
  50         if _target_unknown:
  51             assert isinstance(self, TypeUnknown)
  52         elif target_fundamental:
  53             assert target_giname is None
  54             assert target_foreign is None
  55         elif target_giname:
  56             assert '.' in target_giname
  57             assert target_fundamental is None
  58             assert target_foreign is None
  59         elif target_foreign:
  60             assert ctype is not None
  61             assert target_giname is None
  62             assert target_fundamental is None
  63         else:
  64             assert (ctype is not None) or (gtype_name is not None)
  65         self.target_fundamental = target_fundamental
  66         self.target_giname = target_giname
  67         self.target_foreign = target_foreign
  68         self.is_const = is_const
  69
  70     @property
  71     def resolved(self):
  72         return (self.target_fundamental or
  73                 self.target_giname or
  74                 self.target_foreign)
  75
  76     @property
  77     def unresolved_string(self):
  78         if self.ctype:
  79             return self.ctype
  80         elif self.gtype_name:
  81             return self.gtype_name
  82         else:
  83             assert False
  84
  85     @classmethod
  86     def create_from_gtype_name(cls, gtype_name):
  87         """Parse a GType name (as from g_type_name()), and return a
  88 Type instance.  Note that this function performs namespace lookup,
  89 in contrast to the other create_type() functions."""
  90         # First, is it a fundamental?
  91         fundamental = type_names.get(gtype_name)
  92         if fundamental is not None:
  93             return cls(target_fundamental=fundamental.target_fundamental)
  94         if gtype_name == 'GHashTable':
  95             return Map(TYPE_ANY, TYPE_ANY, gtype_name=gtype_name)
  96         elif gtype_name in ('GArray', 'GPtrArray', 'GByteArray'):
  97             return Array('GLib.' + gtype_name[1:], TYPE_ANY,
  98                          gtype_name=gtype_name)
  99         elif gtype_name == 'GStrv':
 100             bare_utf8 = TYPE_STRING.clone()
 101             bare_utf8.ctype = None
 102             return Array(None, bare_utf8, ctype=None, gtype_name=gtype_name,
 103                          is_const=False)
 104
 105         # Workaround for Gdk.Rectangle being boxed alias for
 106         # cairo.RectangleInt.  G-I does not support boxing of aliases.
 107         # See https://bugzilla.gnome.org/show_bug.cgi?id=655423
 108         if gtype_name == 'GdkRectangle':
 109             gtype_name = 'CairoRectangleInt'
 110
 111         return cls(gtype_name=gtype_name)
 112
 113     def get_giname(self):
 114         assert self.target_giname is not None
 115         return self.target_giname.split('.')[1]
 116
 117     def __cmp__(self, other):
 118         if self.target_fundamental:
 119             return cmp(self.target_fundamental, other.target_fundamental)
 120         if self.target_giname:
 121             return cmp(self.target_giname, other.target_giname)
 122         if self.target_foreign:
 123             return cmp(self.target_foreign, other.target_foreign)
 124         return cmp(self.ctype, other.ctype)
 125
 126     def is_equiv(self, typeval):
 127         """Return True if the specified types are compatible at
 128         an introspection level, disregarding their C types.
 129         A sequence may be given for typeval, in which case
 130         this function returns True if the type is compatible with
 131         any."""
 132         if isinstance(typeval, (list, tuple)):
 133             for val in typeval:
 134                 if self.is_equiv(val):
 135                     return True
 136             return False
 137         return self == typeval
 138
 139     def clone(self):
 140         return Type(target_fundamental=self.target_fundamental,
 141                     target_giname=self.target_giname,
 142                     target_foreign=self.target_foreign,
 143                     ctype=self.ctype,
 144                     is_const=self.is_const)
 145
 146     def __str__(self):
 147         if self.target_fundamental:
 148             return self.target_fundamental
 149         elif self.target_giname:
 150             return self.target_giname
 151         elif self.target_foreign:
 152             return self.target_foreign
 153
 154     def __repr__(self):
 155         if self.target_fundamental:
 156             data = 'target_fundamental=%s, ' % (self.target_fundamental, )
 157         elif self.target_giname:
 158             data = 'target_giname=%s, ' % (self.target_giname, )
 159         elif self.target_foreign:
 160             data = 'target_foreign=%s, ' % (self.target_foreign, )
 161         else:
 162             data = ''
 163         return '%s(%sctype=%s)' % (self.__class__.__name__, data, self.ctype)
 164
 165 class TypeUnknown(Type):
 166     def __init__(self):
 167         Type.__init__(self, _target_unknown=True)
 168
 169 ######
 170 ## Fundamental types
 171 ######
 172 # Two special ones
 173 TYPE_NONE = Type(target_fundamental='none', ctype='void')
 174 TYPE_ANY = Type(target_fundamental='gpointer', ctype='gpointer')
 175 # "Basic" types
 176 TYPE_BOOLEAN = Type(target_fundamental='gboolean', ctype='gboolean')
 177 TYPE_INT8 = Type(target_fundamental='gint8', ctype='gint8')
 178 TYPE_UINT8 = Type(target_fundamental='guint8', ctype='guint8')
 179 TYPE_INT16 = Type(target_fundamental='gint16', ctype='gint16')
 180 TYPE_UINT16 = Type(target_fundamental='guint16', ctype='guint16')
 181 TYPE_INT32 = Type(target_fundamental='gint32', ctype='gint32')
 182 TYPE_UINT32 = Type(target_fundamental='guint32', ctype='guint32')
 183 TYPE_INT64 = Type(target_fundamental='gint64', ctype='gint64')
 184 TYPE_UINT64 = Type(target_fundamental='guint64', ctype='guint64')
 185 TYPE_CHAR = Type(target_fundamental='gchar', ctype='gchar')
 186 TYPE_SHORT = Type(target_fundamental='gshort', ctype='gshort')
 187 TYPE_USHORT = Type(target_fundamental='gushort', ctype='gushort')
 188 TYPE_INT = Type(target_fundamental='gint', ctype='gint')
 189 TYPE_UINT = Type(target_fundamental='guint', ctype='guint')
 190 TYPE_LONG = Type(target_fundamental='glong', ctype='glong')
 191 TYPE_ULONG = Type(target_fundamental='gulong', ctype='gulong')
 192 TYPE_SIZE = Type(target_fundamental='gsize', ctype='gsize')
 193 TYPE_SSIZE = Type(target_fundamental='gssize', ctype='gssize')
 194 TYPE_INTPTR = Type(target_fundamental='gintptr', ctype='gintptr')
 195 TYPE_UINTPTR = Type(target_fundamental='guintptr', ctype='guintptr')
 196 # C99 types
 197 TYPE_LONG_LONG = Type(target_fundamental='long long', ctype='long long')
 198 TYPE_LONG_ULONG = Type(target_fundamental='unsigned long long',
 199                        ctype='unsigned long long')
 200 TYPE_FLOAT = Type(target_fundamental='gfloat', ctype='gfloat')
 201 TYPE_DOUBLE = Type(target_fundamental='gdouble', ctype='gdouble')
 202 # ?
 203 TYPE_LONG_DOUBLE = Type(target_fundamental='long double',
 204                         ctype='long double')
 205 TYPE_UNICHAR = Type(target_fundamental='gunichar', ctype='gunichar')
 206
 207 # C types with semantics overlaid
 208 TYPE_GTYPE = Type(target_fundamental='GType', ctype='GType')
 209 TYPE_STRING = Type(target_fundamental='utf8', ctype='gchar*')
 210 TYPE_FILENAME = Type(target_fundamental='filename', ctype='gchar*')
 211
 212 TYPE_VALIST = Type(target_fundamental='va_list', ctype='va_list')
 213
 214 BASIC_GIR_TYPES = [TYPE_BOOLEAN, TYPE_INT8, TYPE_UINT8, TYPE_INT16,
 215                    TYPE_UINT16, TYPE_INT32, TYPE_UINT32, TYPE_INT64,
 216                    TYPE_UINT64, TYPE_CHAR, TYPE_SHORT, TYPE_USHORT, TYPE_INT,
 217                    TYPE_UINT, TYPE_LONG, TYPE_ULONG, TYPE_SIZE, TYPE_SSIZE,
 218                    TYPE_LONG_LONG, TYPE_LONG_ULONG, TYPE_INTPTR, TYPE_UINTPTR,
 219                    TYPE_FLOAT, TYPE_DOUBLE,
 220                    TYPE_LONG_DOUBLE, TYPE_UNICHAR, TYPE_GTYPE]
 221 GIR_TYPES = [TYPE_NONE, TYPE_ANY]
 222 GIR_TYPES.extend(BASIC_GIR_TYPES)
 223 GIR_TYPES.extend([TYPE_STRING, TYPE_FILENAME, TYPE_VALIST])
 224
 225 INTROSPECTABLE_BASIC = list(GIR_TYPES)
 226 for v in [TYPE_NONE, TYPE_ANY,
 227           TYPE_LONG_LONG, TYPE_LONG_ULONG,
 228           TYPE_LONG_DOUBLE, TYPE_VALIST]:
 229     INTROSPECTABLE_BASIC.remove(v)
 230
 231 type_names = {}
 232 for typeval in GIR_TYPES:
 233     type_names[typeval.target_fundamental] = typeval
 234 basic_type_names = {}
 235 for typeval in BASIC_GIR_TYPES:
 236     basic_type_names[typeval.target_fundamental] = typeval
 237
 238 # C builtin
 239 type_names['char'] = TYPE_CHAR
 240 type_names['signed char'] = TYPE_INT8
 241 type_names['unsigned char'] = TYPE_UINT8
 242 type_names['short'] = TYPE_SHORT
 243 type_names['signed short'] = TYPE_SHORT
 244 type_names['unsigned short'] = TYPE_USHORT
 245 type_names['int'] = TYPE_INT
 246 type_names['signed int'] = TYPE_INT
 247 type_names['unsigned short int'] = TYPE_USHORT
 248 type_names['signed'] = TYPE_INT
 249 type_names['unsigned int'] = TYPE_UINT
 250 type_names['unsigned'] = TYPE_UINT
 251 type_names['long'] = TYPE_LONG
 252 type_names['signed long'] = TYPE_LONG
 253 type_names['unsigned long'] = TYPE_ULONG
 254 type_names['unsigned long int'] = TYPE_ULONG
 255 type_names['float'] = TYPE_FLOAT
 256 type_names['double'] = TYPE_DOUBLE
 257 type_names['char*'] = TYPE_STRING
 258 type_names['void*'] = TYPE_ANY
 259 type_names['void'] = TYPE_NONE
 260 # Also alias the signed one here
 261 type_names['signed long long'] = TYPE_LONG_LONG
 262
 263 # A few additional GLib type aliases
 264 type_names['guchar'] = TYPE_UINT8
 265 type_names['gchararray'] = TYPE_STRING
 266 type_names['gchar*'] = TYPE_STRING
 267 type_names['goffset'] = TYPE_INT64
 268 type_names['gunichar2'] = TYPE_UINT16
 269 type_names['gsize'] = TYPE_SIZE
 270 type_names['gssize'] = TYPE_SSIZE
 271 type_names['gintptr'] = TYPE_INTPTR
 272 type_names['guintptr'] = TYPE_UINTPTR
 273 type_names['gconstpointer'] = TYPE_ANY
 274
 275 # We used to support these; continue to do so
 276 type_names['any'] = TYPE_ANY
 277 type_names['boolean'] = TYPE_BOOLEAN
 278 type_names['uint'] = TYPE_UINT
 279 type_names['ulong'] = TYPE_ULONG
 280
 281 # C stdio, used in GLib public headers; squash this for now here
 282 # until we move scanning into GLib and can (skip)
 283 type_names['FILE*'] = TYPE_ANY
 284
 285 # One off C unix type definitions; note some of these may be GNU Libc
 286 # specific.  If someone is actually bitten by this, feel free to do
 287 # the required configure goop to determine their size and replace
 288 # here.
 289 #
 290 # We don't want to encourage people to use these in their APIs because
 291 # they compromise the platform-independence that GLib gives you.
 292 # These are here mostly to avoid blowing when random platform-specific
 293 # methods are added under #ifdefs inside GLib itself.  We could just (skip)
 294 # the relevant methods, but on the other hand, since these types are just
 295 # integers it's easy enough to expand them.
 296 type_names['size_t'] = type_names['gsize']
 297 type_names['time_t'] = TYPE_LONG
 298 type_names['off_t'] = type_names['gsize']
 299 type_names['pid_t'] = TYPE_INT
 300 type_names['uid_t'] = TYPE_UINT
 301 type_names['gid_t'] = TYPE_UINT
 302 type_names['dev_t'] = TYPE_INT
 303 type_names['socklen_t'] = TYPE_INT32
 304 type_names['size_t'] = TYPE_ULONG
 305 type_names['ssize_t'] = TYPE_LONG
 306
 307 # Obj-C
 308 type_names['id'] = TYPE_ANY
 309
 310 ##
 311 ## Parameters
 312 ##
 313
 314 PARAM_DIRECTION_IN = 'in'
 315 PARAM_DIRECTION_OUT = 'out'
 316 PARAM_DIRECTION_INOUT = 'inout'
 317
 318 PARAM_SCOPE_CALL = 'call'
 319 PARAM_SCOPE_ASYNC = 'async'
 320 PARAM_SCOPE_NOTIFIED = 'notified'
 321
 322 PARAM_TRANSFER_NONE = 'none'
 323 PARAM_TRANSFER_CONTAINER = 'container'
 324 PARAM_TRANSFER_FULL = 'full'
 325
 326 class Namespace(object):
 327     def __init__(self, name, version,
 328                  identifier_prefixes=None,
 329                  symbol_prefixes=None):
 330         self.name = name
 331         self.version = version
 332         if identifier_prefixes is not None:
 333             self.identifier_prefixes = identifier_prefixes
 334         else:
 335             self.identifier_prefixes = [name]
 336         if symbol_prefixes is not None:
 337             self.symbol_prefixes = symbol_prefixes
 338         else:
 339             ps = self.identifier_prefixes
 340             self.symbol_prefixes = [to_underscores(p).lower() for p in ps]
 341         # cache upper-cased versions
 342         self._ucase_symbol_prefixes = [p.upper() for p in self.symbol_prefixes]
 343         self._names = odict() # Maps from GIName -> node
 344         self._aliases = {} # Maps from GIName -> GIName
 345         self._type_names = {} # Maps from GTName -> node
 346         self._ctypes = {} # Maps from CType -> node
 347         self._symbols = {} # Maps from function symbols -> Function
 348
 349     @property
 350     def names(self):
 351         return self._names
 352
 353     @property
 354     def aliases(self):
 355         return self._aliases
 356
 357     @property
 358     def type_names(self):
 359         return self._type_names
 360
 361     @property
 362     def ctypes(self):
 363         return self._ctypes
 364
 365     def type_from_name(self, name, ctype=None):
 366         """Backwards compatibility method for older .gir files, which
 367 only use the 'name' attribute.  If name refers to a fundamental type,
 368 create a Type object referncing it.  If name is already a
 369 fully-qualified GIName like 'Foo.Bar', returns a Type targeting it .
 370 Otherwise a Type targeting name qualififed with the namespace name is
 371 returned."""
 372         if name in type_names:
 373             return Type(target_fundamental=name, ctype=ctype)
 374         if '.' in name:
 375             target = name
 376         else:
 377             target = '%s.%s' % (self.name, name)
 378         return Type(target_giname=target, ctype=ctype)
 379
 380     def append(self, node, replace=False):
 381         previous = self._names.get(node.name)
 382         if previous is not None:
 383             if not replace:
 384                 raise ValueError("Namespace conflict: %r" % (node, ))
 385             self.remove(previous)
 386         # A layering violation...but oh well.
 387         if isinstance(node, Alias):
 388             self._aliases[node.name] = node
 389         elif isinstance(node, Registered) and node.gtype_name is not None:
 390             self._type_names[node.gtype_name] = node
 391         elif isinstance(node, Function):
 392             self._symbols[node.symbol] = node
 393         assert isinstance(node, Node)
 394         assert node.namespace is None
 395         node.namespace = self
 396         self._names[node.name] = node
 397         if hasattr(node, 'ctype'):
 398             self._ctypes[node.ctype] = node
 399         if hasattr(node, 'symbol'):
 400             self._ctypes[node.symbol] = node
 401
 402     def remove(self, node):
 403         if isinstance(node, Alias):
 404             del self._aliases[node.name]
 405         elif isinstance(node, Registered) and node.gtype_name is not None:
 406             del self._type_names[node.gtype_name]
 407         del self._names[node.name]
 408         node.namespace = None
 409         if hasattr(node, 'ctype'):
 410             del self._ctypes[node.ctype]
 411         if isinstance(node, Function):
 412             del self._symbols[node.symbol]
 413
 414     def float(self, node):
 415         """Like remove(), but doesn't unset the node's namespace
 416 back-reference, and it's still possible to look up
 417 functions via get_by_symbol()."""
 418         if isinstance(node, Function):
 419             symbol = node.symbol
 420         self.remove(node)
 421         self._symbols[symbol] = node
 422         node.namespace = self
 423
 424     def __iter__(self):
 425         return iter(self._names)
 426
 427     def iteritems(self):
 428         return self._names.iteritems()
 429
 430     def itervalues(self):
 431         return self._names.itervalues()
 432
 433     def get(self, name):
 434         return self._names.get(name)
 435
 436     def get_by_ctype(self, ctype):
 437         return self._ctypes.get(ctype)
 438
 439     def get_by_symbol(self, symbol):
 440         return self._symbols.get(symbol)
 441
 442     def walk(self, callback):
 443         for node in self.itervalues():
 444             node.walk(callback, [])
 445
 446 class Include(object):
 447
 448     def __init__(self, name, version):
 449         self.name = name
 450         self.version = version
 451
 452     @classmethod
 453     def from_string(cls, string):
 454         return cls(*string.split('-', 1))
 455
 456     def __cmp__(self, other):
 457         namecmp = cmp(self.name, other.name)
 458         if namecmp != 0:
 459             return namecmp
 460         return cmp(self.version, other.version)
 461
 462     def __hash__(self):
 463         return hash(str(self))
 464
 465     def __str__(self):
 466         return '%s-%s' % (self.name, self.version)
 467
 468 class Annotated(object):
 469     """An object which has a few generic metadata
 470 properties."""
 471     def __init__(self):
 472         self.version = None
 473         self.skip = False
 474         self.introspectable = True
 475         self.attributes = [] # (key, value)*
 476         self.deprecated = None
 477         self.deprecated_version = None
 478         self.doc = None
 479
 480 class Node(Annotated):
 481     """A node is a type of object which is uniquely identified by its
 482 (namespace, name) pair.  When combined with a ., this is called a
 483 GIName.  It's possible for nodes to contain or point to other nodes."""
 484
 485     c_name = property(lambda self: self.namespace.name + self.name)
 486     gi_name = property(lambda self: '%s.%s' % (self.namespace.name, self.name))
 487
 488     def __init__(self, name=None):
 489         Annotated.__init__(self)
 490         self.namespace = None # Should be set later by Namespace.append()
 491         self.name = name
 492         self.foreign = False
 493         self.file_positions = set()
 494
 495     def create_type(self):
 496         """Create a Type object referencing this node."""
 497         assert self.namespace is not None
 498         return Type(target_giname=('%s.%s' % (self.namespace.name, self.name)))
 499
 500     def __cmp__(self, other):
 501         nscmp = cmp(self.namespace, other.namespace)
 502         if nscmp != 0:
 503             return nscmp
 504         return cmp(self.name, other.name)
 505
 506     def __repr__(self):
 507         return '%s(%r)' % (self.__class__.__name__, self.name)
 508
 509     def inherit_file_positions(self, node):
 510         self.file_positions.update(node.file_positions)
 511
 512     def add_file_position(self, position):
 513         self.file_positions.add(position)
 514
 515     def add_symbol_reference(self, symbol):
 516         if symbol.source_filename:
 517             self.add_file_position(Position(symbol.source_filename, symbol.line))
 518
 519     def walk(self, callback, chain):
 520         res = callback(self, chain)
 521         assert res in (True, False), "Walk function must return boolean, not %r" % (res, )
 522         if not res:
 523             return False
 524         chain.append(self)
 525         self._walk(callback, chain)
 526         chain.pop()
 527
 528     def _walk(self, callback, chain):
 529         pass
 530
 531
 532 class Registered:
 533     """A node that (possibly) has gtype_name and get_type."""
 534     def __init__(self, gtype_name, get_type):
 535         assert (gtype_name is None and get_type is None) or \
 536                (gtype_name is not None and get_type is not None)
 537         self.gtype_name = gtype_name
 538         self.get_type = get_type
 539
 540
 541 class Callable(Node):
 542
 543     def __init__(self, name, retval, parameters, throws):
 544         Node.__init__(self, name)
 545         self.retval = retval
 546         self.parameters = parameters
 547         self.throws = not not throws
 548         self.instance_parameter = None # Parameter
 549
 550     def get_parameter_index(self, name):
 551         for i, parameter in enumerate(self.parameters):
 552             if parameter.argname == name:
 553                 return i
 554         raise ValueError("Unknown argument %s" % (name, ))
 555
 556     def get_parameter(self, name):
 557         for parameter in self.parameters:
 558             if parameter.argname == name:
 559                 return parameter
 560         raise ValueError("Unknown argument %s" % (name, ))
 561
 562
 563 class Function(Callable):
 564
 565     def __init__(self, name, retval, parameters, throws, symbol):
 566         Callable.__init__(self, name, retval, parameters, throws)
 567         self.symbol = symbol
 568         self.is_method = False
 569         self.is_constructor = False
 570         self.shadowed_by = None # C symbol string
 571         self.shadows = None # C symbol string
 572
 573     def clone(self):
 574         clone = copy.copy(self)
 575         # copy the parameters array so a change to self.parameters does not
 576         # influence clone.parameters.
 577         clone.parameters = self.parameters[:]
 578         return clone
 579
 580
 581 class ErrorQuarkFunction(Function):
 582
 583     def __init__(self, name, retval, parameters, throws, symbol, error_domain):
 584         Function.__init__(self, name, retval, parameters, throws, symbol)
 585         self.error_domain = error_domain
 586
 587
 588 class VFunction(Callable):
 589
 590     def __init__(self, name, retval, parameters, throws):
 591         Callable.__init__(self, name, retval, parameters, throws)
 592         self.invoker = None
 593
 594     @classmethod
 595     def from_callback(cls, cb):
 596         obj = cls(cb.name, cb.retval, cb.parameters[1:],
 597                   cb.throws)
 598         return obj
 599
 600
 601
 602 class Varargs(Type):
 603
 604     def __init__(self):
 605         Type.__init__(self, '<varargs>', target_fundamental='<varargs>')
 606
 607
 608 class Array(Type):
 609     C = '<c>'
 610     GLIB_ARRAY = 'GLib.Array'
 611     GLIB_BYTEARRAY = 'GLib.ByteArray'
 612     GLIB_PTRARRAY = 'GLib.PtrArray'
 613
 614     def __init__(self, array_type, element_type, **kwargs):
 615         Type.__init__(self, target_fundamental='<array>',
 616                       **kwargs)
 617         if (array_type is None or array_type == self.C):
 618             self.array_type = self.C
 619         else:
 620             assert array_type in (self.GLIB_ARRAY,
 621                                   self.GLIB_BYTEARRAY,
 622                                   self.GLIB_PTRARRAY), array_type
 623             self.array_type = array_type
 624         assert isinstance(element_type, Type)
 625         self.element_type = element_type
 626         self.zeroterminated = True
 627         self.length_param_name = None
 628         self.size = None
 629
 630     def clone(self):
 631         arr = Array(self.array_type, self.element_type)
 632         arr.zeroterminated = self.zeroterminated
 633         arr.length_param_name = self.length_param_name
 634         arr.size = self.size
 635         return arr
 636
 637 class List(Type):
 638
 639     def __init__(self, name, element_type, **kwargs):
 640         Type.__init__(self, target_fundamental='<list>',
 641                       **kwargs)
 642         self.name = name
 643         assert isinstance(element_type, Type)
 644         self.element_type = element_type
 645
 646     def clone(self):
 647         l = List(self.name, self.element_type)
 648         l.zeroterminated = self.zeroterminated
 649         l.length_param_name = self.length_param_name
 650         l.size = self.size
 651         return l
 652
 653 class Map(Type):
 654
 655     def __init__(self, key_type, value_type, **kwargs):
 656         Type.__init__(self, target_fundamental='<map>', **kwargs)
 657         assert isinstance(key_type, Type)
 658         self.key_type = key_type
 659         assert isinstance(value_type, Type)
 660         self.value_type = value_type
 661
 662     def clone(self):
 663         return Map(self.key_type, self.value_type)
 664
 665 class Alias(Node):
 666
 667     def __init__(self, name, target, ctype=None):
 668         Node.__init__(self, name)
 669         self.target = target
 670         self.ctype = ctype
 671
 672
 673 class TypeContainer(Annotated):
 674     """A fundamental base class for Return and Parameter."""
 675
 676     def __init__(self, typenode, transfer):
 677         Annotated.__init__(self)
 678         self.type = typenode
 679         if transfer is not None:
 680             self.transfer = transfer
 681         elif typenode.is_const:
 682             self.transfer = PARAM_TRANSFER_NONE
 683         else:
 684             self.transfer = None
 685
 686
 687 class Parameter(TypeContainer):
 688     """An argument to a function."""
 689
 690     def __init__(self, argname, typenode, direction=None,
 691                  transfer=None, allow_none=False, scope=None,
 692                  caller_allocates=False):
 693         TypeContainer.__init__(self, typenode, transfer)
 694         self.argname = argname
 695         self.direction = direction
 696         self.allow_none = allow_none
 697         self.scope = scope
 698         self.caller_allocates = caller_allocates
 699         self.closure_name = None
 700         self.destroy_name = None
 701
 702
 703 class Return(TypeContainer):
 704     """A return value from a function."""
 705
 706     def __init__(self, rtype, transfer=None):
 707         TypeContainer.__init__(self, rtype, transfer)
 708         self.direction = PARAM_DIRECTION_OUT
 709
 710
 711 class Enum(Node, Registered):
 712
 713     def __init__(self, name, ctype,
 714                  gtype_name=None,
 715                  get_type=None,
 716                  c_symbol_prefix=None,
 717                  members=None):
 718         Node.__init__(self, name)
 719         Registered.__init__(self, gtype_name, get_type)
 720         self.c_symbol_prefix = c_symbol_prefix
 721         self.ctype = ctype
 722         self.members = members
 723         # Associated error domain name
 724         self.error_domain = None
 725
 726
 727 class Bitfield(Node, Registered):
 728
 729     def __init__(self, name, ctype,
 730                  gtype_name=None,
 731                  c_symbol_prefix=None,
 732                  get_type=None,
 733                  members=None):
 734         Node.__init__(self, name)
 735         Registered.__init__(self, gtype_name, get_type)
 736         self.ctype = ctype
 737         self.c_symbol_prefix = c_symbol_prefix
 738         self.members = members
 739
 740
 741 class Member(Annotated):
 742
 743     def __init__(self, name, value, symbol, nick):
 744         Annotated.__init__(self)
 745         self.name = name
 746         self.value = value
 747         self.symbol = symbol
 748         self.nick = nick
 749
 750     def __cmp__(self, other):
 751         return cmp(self.name, other.name)
 752
 753
 754
 755 class Compound(Node, Registered):
 756     def __init__(self, name,
 757                  ctype=None,
 758                  gtype_name=None,
 759                  get_type=None,
 760                  c_symbol_prefix=None,
 761                  disguised=False):
 762         Node.__init__(self, name)
 763         Registered.__init__(self, gtype_name, get_type)
 764         self.ctype = ctype
 765         self.methods = []
 766         self.static_methods = []
 767         self.fields = []
 768         self.constructors = []
 769         self.disguised = disguised
 770         self.gtype_name = gtype_name
 771         self.get_type = get_type
 772         self.c_symbol_prefix = c_symbol_prefix
 773
 774     def add_gtype(self, gtype_name, get_type):
 775         self.gtype_name = gtype_name
 776         self.get_type = get_type
 777
 778     def _walk(self, callback, chain):
 779         for ctor in self.constructors:
 780             ctor.walk(callback, chain)
 781         for func in self.methods:
 782             func.walk(callback, chain)
 783         for func in self.static_methods:
 784             func.walk(callback, chain)
 785         for field in self.fields:
 786             if field.anonymous_node is not None:
 787                 field.anonymous_node.walk(callback, chain)
 788
 789 class Field(Annotated):
 790
 791     def __init__(self, name, typenode, readable, writable, bits=None,
 792                  anonymous_node=None):
 793         Annotated.__init__(self)
 794         assert (typenode or anonymous_node)
 795         self.name = name
 796         self.type = typenode
 797         self.readable = readable
 798         self.writable = writable
 799         self.bits = bits
 800         self.anonymous_node = anonymous_node
 801         self.private = False
 802
 803     def __cmp__(self, other):
 804         return cmp(self.name, other.name)
 805
 806
 807 class Record(Compound):
 808
 809     def __init__(self, name,
 810                  ctype=None,
 811                  gtype_name=None,
 812                  get_type=None,
 813                  c_symbol_prefix=None,
 814                  disguised=False):
 815         Compound.__init__(self, name,
 816                           ctype=ctype,
 817                           gtype_name=gtype_name,
 818                           get_type=get_type,
 819                           c_symbol_prefix=c_symbol_prefix,
 820                           disguised=disguised)
 821         # If non-None, this record defines the FooClass C structure
 822         # for some Foo GObject (or similar for GInterface)
 823         self.is_gtype_struct_for = None
 824
 825
 826 class Union(Compound):
 827
 828     def __init__(self, name,
 829                  ctype=None,
 830                  gtype_name=None,
 831                  get_type=None,
 832                  c_symbol_prefix=None,
 833                  disguised=False):
 834         Compound.__init__(self, name,
 835                           ctype=ctype,
 836                           gtype_name=gtype_name,
 837                           get_type=get_type,
 838                           c_symbol_prefix=c_symbol_prefix,
 839                           disguised=disguised)
 840
 841
 842 class Boxed(Node, Registered):
 843     """A boxed type with no known associated structure/union."""
 844     def __init__(self, name,
 845                  gtype_name=None,
 846                  get_type=None,
 847                  c_symbol_prefix=None):
 848         assert gtype_name is not None
 849         assert get_type is not None
 850         Node.__init__(self, name)
 851         Registered.__init__(self, gtype_name, get_type)
 852         if get_type is not None:
 853             assert c_symbol_prefix is not None
 854         self.c_symbol_prefix = c_symbol_prefix
 855         self.constructors = []
 856         self.methods = []
 857         self.static_methods = []
 858
 859     def _walk(self, callback, chain):
 860         for ctor in self.constructors:
 861             ctor.walk(callback, chain)
 862         for meth in self.methods:
 863             meth.walk(callback, chain)
 864         for meth in self.static_methods:
 865             meth.walk(callback, chain)
 866
 867
 868 class Signal(Callable):
 869
 870     def __init__(self, name, retval, parameters):
 871         Callable.__init__(self, name, retval, parameters, False)
 872
 873
 874 class Class(Node, Registered):
 875
 876     def __init__(self, name, parent,
 877                  ctype=None,
 878                  gtype_name=None,
 879                  get_type=None,
 880                  c_symbol_prefix=None,
 881                  is_abstract=False):
 882         Node.__init__(self, name)
 883         Registered.__init__(self, gtype_name, get_type)
 884         self.ctype = ctype
 885         self.c_symbol_prefix = c_symbol_prefix
 886         self.parent = parent
 887         self.fundamental = False
 888         self.unref_func = None
 889         self.ref_func = None
 890         self.set_value_func = None
 891         self.get_value_func = None
 892         # When we're in the scanner, we keep around a list
 893         # of parents so that we can transparently fall back
 894         # if there are 'hidden' parents
 895         self.parent_chain = []
 896         self.glib_type_struct = None
 897         self.is_abstract = is_abstract
 898         self.methods = []
 899         self.virtual_methods = []
 900         self.static_methods = []
 901         self.interfaces = []
 902         self.constructors = []
 903         self.properties = []
 904         self.fields = []
 905         self.signals = []
 906
 907     def _walk(self, callback, chain):
 908         for meth in self.methods:
 909             meth.walk(callback, chain)
 910         for meth in self.virtual_methods:
 911             meth.walk(callback, chain)
 912         for meth in self.static_methods:
 913             meth.walk(callback, chain)
 914         for ctor in self.constructors:
 915             ctor.walk(callback, chain)
 916         for field in self.fields:
 917             if field.anonymous_node:
 918                 field.anonymous_node.walk(callback, chain)
 919         for sig in self.signals:
 920             sig.walk(callback, chain)
 921
 922
 923 class Interface(Node, Registered):
 924
 925     def __init__(self, name, parent,
 926                  ctype=None,
 927                  gtype_name=None,
 928                  get_type=None,
 929                  c_symbol_prefix=None):
 930         Node.__init__(self, name)
 931         Registered.__init__(self, gtype_name, get_type)
 932         self.ctype = ctype
 933         self.c_symbol_prefix = c_symbol_prefix
 934         self.parent = parent
 935         self.parent_chain = []
 936         self.methods = []
 937         self.signals = []
 938         self.static_methods = []
 939         self.virtual_methods = []
 940         self.glib_type_struct = None
 941         self.properties = []
 942         self.fields = []
 943         self.prerequisites = []
 944
 945     def _walk(self, callback, chain):
 946         for meth in self.methods:
 947             meth.walk(callback, chain)
 948         for meth in self.static_methods:
 949             meth.walk(callback, chain)
 950         for meth in self.virtual_methods:
 951             meth.walk(callback, chain)
 952         for field in self.fields:
 953             if field.anonymous_node:
 954                 field.anonymous_node.walk(callback, chain)
 955         for sig in self.signals:
 956             sig.walk(callback, chain)
 957
 958
 959 class Constant(Node):
 960
 961     def __init__(self, name, value_type, value):
 962         Node.__init__(self, name)
 963         self.value_type = value_type
 964         self.value = value
 965
 966
 967 class Property(Node):
 968
 969     def __init__(self, name, typeobj, readable, writable,
 970                  construct, construct_only, transfer=None):
 971         Node.__init__(self, name)
 972         self.type = typeobj
 973         self.readable = readable
 974         self.writable = writable
 975         self.construct = construct
 976         self.construct_only = construct_only
 977         if transfer is None:
 978             self.transfer = PARAM_TRANSFER_NONE
 979         else:
 980             self.transfer = transfer
 981
 982
 983 class Callback(Callable):
 984
 985     def __init__(self, name, retval, parameters, throws, ctype=None):
 986         Callable.__init__(self, name, retval, parameters, throws)
 987         self.ctype = ctype