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 SIGNAL_FIRST = 'first'
 327 SIGNAL_LAST = 'last'
 328 SIGNAL_CLEANUP = 'cleanup'
 329 SIGNAL_MUST_COLLECT = 'must-collect'
 330
 331
 332 class Namespace(object):
 333     def __init__(self, name, version,
 334                  identifier_prefixes=None,
 335                  symbol_prefixes=None):
 336         self.name = name
 337         self.version = version
 338         if identifier_prefixes is not None:
 339             self.identifier_prefixes = identifier_prefixes
 340         else:
 341             self.identifier_prefixes = [name]
 342         if symbol_prefixes is not None:
 343             self.symbol_prefixes = symbol_prefixes
 344         else:
 345             ps = self.identifier_prefixes
 346             self.symbol_prefixes = [to_underscores(p).lower() for p in ps]
 347         # cache upper-cased versions
 348         self._ucase_symbol_prefixes = [p.upper() for p in self.symbol_prefixes]
 349         self._names = odict() # Maps from GIName -> node
 350         self._aliases = {} # Maps from GIName -> GIName
 351         self._type_names = {} # Maps from GTName -> node
 352         self._ctypes = {} # Maps from CType -> node
 353         self._symbols = {} # Maps from function symbols -> Function
 354
 355     @property
 356     def names(self):
 357         return self._names
 358
 359     @property
 360     def aliases(self):
 361         return self._aliases
 362
 363     @property
 364     def type_names(self):
 365         return self._type_names
 366
 367     @property
 368     def ctypes(self):
 369         return self._ctypes
 370
 371     def type_from_name(self, name, ctype=None):
 372         """Backwards compatibility method for older .gir files, which
 373 only use the 'name' attribute.  If name refers to a fundamental type,
 374 create a Type object referncing it.  If name is already a
 375 fully-qualified GIName like 'Foo.Bar', returns a Type targeting it .
 376 Otherwise a Type targeting name qualififed with the namespace name is
 377 returned."""
 378         if name in type_names:
 379             return Type(target_fundamental=name, ctype=ctype)
 380         if '.' in name:
 381             target = name
 382         else:
 383             target = '%s.%s' % (self.name, name)
 384         return Type(target_giname=target, ctype=ctype)
 385
 386     def append(self, node, replace=False):
 387         previous = self._names.get(node.name)
 388         if previous is not None:
 389             if not replace:
 390                 raise ValueError("Namespace conflict: %r" % (node, ))
 391             self.remove(previous)
 392         # A layering violation...but oh well.
 393         if isinstance(node, Alias):
 394             self._aliases[node.name] = node
 395         elif isinstance(node, Registered) and node.gtype_name is not None:
 396             self._type_names[node.gtype_name] = node
 397         elif isinstance(node, Function):
 398             self._symbols[node.symbol] = node
 399         assert isinstance(node, Node)
 400         assert node.namespace is None
 401         node.namespace = self
 402         self._names[node.name] = node
 403         if hasattr(node, 'ctype'):
 404             self._ctypes[node.ctype] = node
 405         if hasattr(node, 'symbol'):
 406             self._ctypes[node.symbol] = node
 407
 408     def remove(self, node):
 409         if isinstance(node, Alias):
 410             del self._aliases[node.name]
 411         elif isinstance(node, Registered) and node.gtype_name is not None:
 412             del self._type_names[node.gtype_name]
 413         del self._names[node.name]
 414         node.namespace = None
 415         if hasattr(node, 'ctype'):
 416             del self._ctypes[node.ctype]
 417         if isinstance(node, Function):
 418             del self._symbols[node.symbol]
 419
 420     def float(self, node):
 421         """Like remove(), but doesn't unset the node's namespace
 422 back-reference, and it's still possible to look up
 423 functions via get_by_symbol()."""
 424         if isinstance(node, Function):
 425             symbol = node.symbol
 426         self.remove(node)
 427         self._symbols[symbol] = node
 428         node.namespace = self
 429
 430     def __iter__(self):
 431         return iter(self._names)
 432
 433     def iteritems(self):
 434         return self._names.iteritems()
 435
 436     def itervalues(self):
 437         return self._names.itervalues()
 438
 439     def get(self, name):
 440         return self._names.get(name)
 441
 442     def get_by_ctype(self, ctype):
 443         return self._ctypes.get(ctype)
 444
 445     def get_by_symbol(self, symbol):
 446         return self._symbols.get(symbol)
 447
 448     def walk(self, callback):
 449         for node in self.itervalues():
 450             node.walk(callback, [])
 451
 452 class Include(object):
 453
 454     def __init__(self, name, version):
 455         self.name = name
 456         self.version = version
 457
 458     @classmethod
 459     def from_string(cls, string):
 460         return cls(*string.split('-', 1))
 461
 462     def __cmp__(self, other):
 463         namecmp = cmp(self.name, other.name)
 464         if namecmp != 0:
 465             return namecmp
 466         return cmp(self.version, other.version)
 467
 468     def __hash__(self):
 469         return hash(str(self))
 470
 471     def __str__(self):
 472         return '%s-%s' % (self.name, self.version)
 473
 474 class Annotated(object):
 475     """An object which has a few generic metadata
 476 properties."""
 477     def __init__(self):
 478         self.version = None
 479         self.skip = False
 480         self.introspectable = True
 481         self.attributes = [] # (key, value)*
 482         self.deprecated = None
 483         self.deprecated_version = None
 484         self.doc = None
 485
 486 class Node(Annotated):
 487     """A node is a type of object which is uniquely identified by its
 488 (namespace, name) pair.  When combined with a ., this is called a
 489 GIName.  It's possible for nodes to contain or point to other nodes."""
 490
 491     c_name = property(lambda self: self.namespace.name + self.name)
 492     gi_name = property(lambda self: '%s.%s' % (self.namespace.name, self.name))
 493
 494     def __init__(self, name=None):
 495         Annotated.__init__(self)
 496         self.namespace = None # Should be set later by Namespace.append()
 497         self.name = name
 498         self.foreign = False
 499         self.file_positions = set()
 500
 501     def create_type(self):
 502         """Create a Type object referencing this node."""
 503         assert self.namespace is not None
 504         return Type(target_giname=('%s.%s' % (self.namespace.name, self.name)))
 505
 506     def __cmp__(self, other):
 507         nscmp = cmp(self.namespace, other.namespace)
 508         if nscmp != 0:
 509             return nscmp
 510         return cmp(self.name, other.name)
 511
 512     def __repr__(self):
 513         return '%s(%r)' % (self.__class__.__name__, self.name)
 514
 515     def inherit_file_positions(self, node):
 516         self.file_positions.update(node.file_positions)
 517
 518     def add_file_position(self, position):
 519         self.file_positions.add(position)
 520
 521     def add_symbol_reference(self, symbol):
 522         if symbol.source_filename:
 523             self.add_file_position(Position(symbol.source_filename, symbol.line))
 524
 525     def walk(self, callback, chain):
 526         res = callback(self, chain)
 527         assert res in (True, False), "Walk function must return boolean, not %r" % (res, )
 528         if not res:
 529             return False
 530         chain.append(self)
 531         self._walk(callback, chain)
 532         chain.pop()
 533
 534     def _walk(self, callback, chain):
 535         pass
 536
 537
 538 class Registered:
 539     """A node that (possibly) has gtype_name and get_type."""
 540     def __init__(self, gtype_name, get_type):
 541         assert (gtype_name is None and get_type is None) or \
 542                (gtype_name is not None and get_type is not None)
 543         self.gtype_name = gtype_name
 544         self.get_type = get_type
 545
 546
 547 class Callable(Node):
 548
 549     def __init__(self, name, retval, parameters, throws):
 550         Node.__init__(self, name)
 551         self.retval = retval
 552         self.parameters = parameters
 553         self.throws = not not throws
 554         self.instance_parameter = None # Parameter
 555
 556     def get_parameter_index(self, name):
 557         for i, parameter in enumerate(self.parameters):
 558             if parameter.argname == name:
 559                 return i
 560         raise ValueError("Unknown argument %s" % (name, ))
 561
 562     def get_parameter(self, name):
 563         for parameter in self.parameters:
 564             if parameter.argname == name:
 565                 return parameter
 566         raise ValueError("Unknown argument %s" % (name, ))
 567
 568
 569 class Function(Callable):
 570
 571     def __init__(self, name, retval, parameters, throws, symbol):
 572         Callable.__init__(self, name, retval, parameters, throws)
 573         self.symbol = symbol
 574         self.is_method = False
 575         self.is_constructor = False
 576         self.shadowed_by = None # C symbol string
 577         self.shadows = None # C symbol string
 578         self.moved_to = None # namespaced function name string
 579
 580     def clone(self):
 581         clone = copy.copy(self)
 582         # copy the parameters array so a change to self.parameters does not
 583         # influence clone.parameters.
 584         clone.parameters = self.parameters[:]
 585         return clone
 586
 587
 588 class ErrorQuarkFunction(Function):
 589
 590     def __init__(self, name, retval, parameters, throws, symbol, error_domain):
 591         Function.__init__(self, name, retval, parameters, throws, symbol)
 592         self.error_domain = error_domain
 593
 594
 595 class ErrorQuarkFunction(Function):
 596
 597     def __init__(self, name, retval, parameters, throws, symbol, error_domain):
 598         Function.__init__(self, name, retval, parameters, throws, symbol)
 599         self.error_domain = error_domain
 600
 601
 602 class VFunction(Callable):
 603
 604     def __init__(self, name, retval, parameters, throws):
 605         Callable.__init__(self, name, retval, parameters, throws)
 606         self.invoker = None
 607
 608     @classmethod
 609     def from_callback(cls, cb):
 610         obj = cls(cb.name, cb.retval, cb.parameters[1:],
 611                   cb.throws)
 612         return obj
 613
 614
 615
 616 class Varargs(Type):
 617
 618     def __init__(self):
 619         Type.__init__(self, '<varargs>', target_fundamental='<varargs>')
 620
 621
 622 class Array(Type):
 623     C = '<c>'
 624     GLIB_ARRAY = 'GLib.Array'
 625     GLIB_BYTEARRAY = 'GLib.ByteArray'
 626     GLIB_PTRARRAY = 'GLib.PtrArray'
 627
 628     def __init__(self, array_type, element_type, **kwargs):
 629         Type.__init__(self, target_fundamental='<array>',
 630                       **kwargs)
 631         if (array_type is None or array_type == self.C):
 632             self.array_type = self.C
 633         else:
 634             assert array_type in (self.GLIB_ARRAY,
 635                                   self.GLIB_BYTEARRAY,
 636                                   self.GLIB_PTRARRAY), array_type
 637             self.array_type = array_type
 638         assert isinstance(element_type, Type)
 639         self.element_type = element_type
 640         self.zeroterminated = True
 641         self.length_param_name = None
 642         self.size = None
 643
 644     def clone(self):
 645         arr = Array(self.array_type, self.element_type)
 646         arr.zeroterminated = self.zeroterminated
 647         arr.length_param_name = self.length_param_name
 648         arr.size = self.size
 649         return arr
 650
 651 class List(Type):
 652
 653     def __init__(self, name, element_type, **kwargs):
 654         Type.__init__(self, target_fundamental='<list>',
 655                       **kwargs)
 656         self.name = name
 657         assert isinstance(element_type, Type)
 658         self.element_type = element_type
 659
 660     def clone(self):
 661         l = List(self.name, self.element_type)
 662         l.zeroterminated = self.zeroterminated
 663         l.length_param_name = self.length_param_name
 664         l.size = self.size
 665         return l
 666
 667 class Map(Type):
 668
 669     def __init__(self, key_type, value_type, **kwargs):
 670         Type.__init__(self, target_fundamental='<map>', **kwargs)
 671         assert isinstance(key_type, Type)
 672         self.key_type = key_type
 673         assert isinstance(value_type, Type)
 674         self.value_type = value_type
 675
 676     def clone(self):
 677         return Map(self.key_type, self.value_type)
 678
 679 class Alias(Node):
 680
 681     def __init__(self, name, target, ctype=None):
 682         Node.__init__(self, name)
 683         self.target = target
 684         self.ctype = ctype
 685
 686
 687 class TypeContainer(Annotated):
 688     """A fundamental base class for Return and Parameter."""
 689
 690     def __init__(self, typenode, transfer):
 691         Annotated.__init__(self)
 692         self.type = typenode
 693         if transfer is not None:
 694             self.transfer = transfer
 695         elif typenode.is_const:
 696             self.transfer = PARAM_TRANSFER_NONE
 697         else:
 698             self.transfer = None
 699
 700
 701 class Parameter(TypeContainer):
 702     """An argument to a function."""
 703
 704     def __init__(self, argname, typenode, direction=None,
 705                  transfer=None, allow_none=False, scope=None,
 706                  caller_allocates=False):
 707         TypeContainer.__init__(self, typenode, transfer)
 708         self.argname = argname
 709         self.direction = direction
 710         self.allow_none = allow_none
 711         self.scope = scope
 712         self.caller_allocates = caller_allocates
 713         self.closure_name = None
 714         self.destroy_name = None
 715
 716
 717 class Return(TypeContainer):
 718     """A return value from a function."""
 719
 720     def __init__(self, rtype, transfer=None):
 721         TypeContainer.__init__(self, rtype, transfer)
 722         self.direction = PARAM_DIRECTION_OUT
 723
 724
 725 class Enum(Node, Registered):
 726
 727     def __init__(self, name, ctype,
 728                  gtype_name=None,
 729                  get_type=None,
 730                  c_symbol_prefix=None,
 731                  members=None):
 732         Node.__init__(self, name)
 733         Registered.__init__(self, gtype_name, get_type)
 734         self.c_symbol_prefix = c_symbol_prefix
 735         self.ctype = ctype
 736         self.members = members
 737         # Associated error domain name
 738         self.error_domain = None
 739
 740
 741 class Bitfield(Node, Registered):
 742
 743     def __init__(self, name, ctype,
 744                  gtype_name=None,
 745                  c_symbol_prefix=None,
 746                  get_type=None,
 747                  members=None):
 748         Node.__init__(self, name)
 749         Registered.__init__(self, gtype_name, get_type)
 750         self.ctype = ctype
 751         self.c_symbol_prefix = c_symbol_prefix
 752         self.members = members
 753
 754
 755 class Member(Annotated):
 756
 757     def __init__(self, name, value, symbol, nick):
 758         Annotated.__init__(self)
 759         self.name = name
 760         self.value = value
 761         self.symbol = symbol
 762         self.nick = nick
 763
 764     def __cmp__(self, other):
 765         return cmp(self.name, other.name)
 766
 767
 768
 769 class Compound(Node, Registered):
 770     def __init__(self, name,
 771                  ctype=None,
 772                  gtype_name=None,
 773                  get_type=None,
 774                  c_symbol_prefix=None,
 775                  disguised=False):
 776         Node.__init__(self, name)
 777         Registered.__init__(self, gtype_name, get_type)
 778         self.ctype = ctype
 779         self.methods = []
 780         self.static_methods = []
 781         self.fields = []
 782         self.constructors = []
 783         self.disguised = disguised
 784         self.gtype_name = gtype_name
 785         self.get_type = get_type
 786         self.c_symbol_prefix = c_symbol_prefix
 787
 788     def add_gtype(self, gtype_name, get_type):
 789         self.gtype_name = gtype_name
 790         self.get_type = get_type
 791
 792     def _walk(self, callback, chain):
 793         for ctor in self.constructors:
 794             ctor.walk(callback, chain)
 795         for func in self.methods:
 796             func.walk(callback, chain)
 797         for func in self.static_methods:
 798             func.walk(callback, chain)
 799         for field in self.fields:
 800             if field.anonymous_node is not None:
 801                 field.anonymous_node.walk(callback, chain)
 802
 803 class Field(Annotated):
 804
 805     def __init__(self, name, typenode, readable, writable, bits=None,
 806                  anonymous_node=None):
 807         Annotated.__init__(self)
 808         assert (typenode or anonymous_node)
 809         self.name = name
 810         self.type = typenode
 811         self.readable = readable
 812         self.writable = writable
 813         self.bits = bits
 814         self.anonymous_node = anonymous_node
 815         self.private = False
 816
 817     def __cmp__(self, other):
 818         return cmp(self.name, other.name)
 819
 820
 821 class Record(Compound):
 822
 823     def __init__(self, name,
 824                  ctype=None,
 825                  gtype_name=None,
 826                  get_type=None,
 827                  c_symbol_prefix=None,
 828                  disguised=False):
 829         Compound.__init__(self, name,
 830                           ctype=ctype,
 831                           gtype_name=gtype_name,
 832                           get_type=get_type,
 833                           c_symbol_prefix=c_symbol_prefix,
 834                           disguised=disguised)
 835         # If non-None, this record defines the FooClass C structure
 836         # for some Foo GObject (or similar for GInterface)
 837         self.is_gtype_struct_for = None
 838
 839
 840 class Union(Compound):
 841
 842     def __init__(self, name,
 843                  ctype=None,
 844                  gtype_name=None,
 845                  get_type=None,
 846                  c_symbol_prefix=None,
 847                  disguised=False):
 848         Compound.__init__(self, name,
 849                           ctype=ctype,
 850                           gtype_name=gtype_name,
 851                           get_type=get_type,
 852                           c_symbol_prefix=c_symbol_prefix,
 853                           disguised=disguised)
 854
 855
 856 class Boxed(Node, Registered):
 857     """A boxed type with no known associated structure/union."""
 858     def __init__(self, name,
 859                  gtype_name=None,
 860                  get_type=None,
 861                  c_symbol_prefix=None):
 862         assert gtype_name is not None
 863         assert get_type is not None
 864         Node.__init__(self, name)
 865         Registered.__init__(self, gtype_name, get_type)
 866         if get_type is not None:
 867             assert c_symbol_prefix is not None
 868         self.c_symbol_prefix = c_symbol_prefix
 869         self.constructors = []
 870         self.methods = []
 871         self.static_methods = []
 872
 873     def _walk(self, callback, chain):
 874         for ctor in self.constructors:
 875             ctor.walk(callback, chain)
 876         for meth in self.methods:
 877             meth.walk(callback, chain)
 878         for meth in self.static_methods:
 879             meth.walk(callback, chain)
 880
 881
 882 class Signal(Callable):
 883
 884     def __init__(self, name, retval, parameters, when=None,
 885                  no_recurse=False, detailed=False, action=False,
 886                  no_hooks=False):
 887         Callable.__init__(self, name, retval, parameters, False)
 888         self.when = when
 889         self.no_recurse = no_recurse
 890         self.detailed = detailed
 891         self.action = action
 892         self.no_hooks = no_hooks
 893
 894
 895 class Class(Node, Registered):
 896
 897     def __init__(self, name, parent,
 898                  ctype=None,
 899                  gtype_name=None,
 900                  get_type=None,
 901                  c_symbol_prefix=None,
 902                  is_abstract=False):
 903         Node.__init__(self, name)
 904         Registered.__init__(self, gtype_name, get_type)
 905         self.ctype = ctype
 906         self.c_symbol_prefix = c_symbol_prefix
 907         self.parent = parent
 908         self.fundamental = False
 909         self.unref_func = None
 910         self.ref_func = None
 911         self.set_value_func = None
 912         self.get_value_func = None
 913         # When we're in the scanner, we keep around a list
 914         # of parents so that we can transparently fall back
 915         # if there are 'hidden' parents
 916         self.parent_chain = []
 917         self.glib_type_struct = None
 918         self.is_abstract = is_abstract
 919         self.methods = []
 920         self.virtual_methods = []
 921         self.static_methods = []
 922         self.interfaces = []
 923         self.constructors = []
 924         self.properties = []
 925         self.fields = []
 926         self.signals = []
 927
 928     def _walk(self, callback, chain):
 929         for meth in self.methods:
 930             meth.walk(callback, chain)
 931         for meth in self.virtual_methods:
 932             meth.walk(callback, chain)
 933         for meth in self.static_methods:
 934             meth.walk(callback, chain)
 935         for ctor in self.constructors:
 936             ctor.walk(callback, chain)
 937         for field in self.fields:
 938             if field.anonymous_node:
 939                 field.anonymous_node.walk(callback, chain)
 940         for sig in self.signals:
 941             sig.walk(callback, chain)
 942
 943
 944 class Interface(Node, Registered):
 945
 946     def __init__(self, name, parent,
 947                  ctype=None,
 948                  gtype_name=None,
 949                  get_type=None,
 950                  c_symbol_prefix=None):
 951         Node.__init__(self, name)
 952         Registered.__init__(self, gtype_name, get_type)
 953         self.ctype = ctype
 954         self.c_symbol_prefix = c_symbol_prefix
 955         self.parent = parent
 956         self.parent_chain = []
 957         self.methods = []
 958         self.signals = []
 959         self.static_methods = []
 960         self.virtual_methods = []
 961         self.glib_type_struct = None
 962         self.properties = []
 963         self.fields = []
 964         self.prerequisites = []
 965
 966     def _walk(self, callback, chain):
 967         for meth in self.methods:
 968             meth.walk(callback, chain)
 969         for meth in self.static_methods:
 970             meth.walk(callback, chain)
 971         for meth in self.virtual_methods:
 972             meth.walk(callback, chain)
 973         for field in self.fields:
 974             if field.anonymous_node:
 975                 field.anonymous_node.walk(callback, chain)
 976         for sig in self.signals:
 977             sig.walk(callback, chain)
 978
 979
 980 class Constant(Node):
 981
 982     def __init__(self, name, value_type, value):
 983         Node.__init__(self, name)
 984         self.value_type = value_type
 985         self.value = value
 986
 987
 988 class Property(Node):
 989
 990     def __init__(self, name, typeobj, readable, writable,
 991                  construct, construct_only, transfer=None):
 992         Node.__init__(self, name)
 993         self.type = typeobj
 994         self.readable = readable
 995         self.writable = writable
 996         self.construct = construct
 997         self.construct_only = construct_only
 998         if transfer is None:
 999             self.transfer = PARAM_TRANSFER_NONE
1000         else:
1001             self.transfer = transfer
1002
1003
1004 class Callback(Callable):
1005
1006     def __init__(self, name, retval, parameters, throws, ctype=None):
1007         Callable.__init__(self, name, retval, parameters, throws)
1008         self.ctype = ctype