git.roojs.org Git - gnome.gobject-introspection/blob - giscanner/glibtransformer.py

   1 # -*- Mode: Python -*-
   2 # GObject-Introspection - a framework for introspecting GObject libraries
   3 # Copyright (C) 2008  Johan Dahlin
   4 #
   5 # This program is free software; you can redistribute it and/or
   6 # modify it under the terms of the GNU General Public License
   7 # as published by the Free Software Foundation; either version 2
   8 # of the License, or (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program; if not, write to the Free Software
  17 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  18 # 02110-1301, USA.
  19 #
  20
  21 import os
  22 import re
  23 import ctypes
  24 from ctypes.util import find_library
  25
  26 from . import cgobject
  27 from .ast import (Callback, Enum, Function, Member, Namespace, Parameter,
  28                   Sequence, Property, Return, Struct, Type, Alias,
  29                   Union, type_name_from_ctype)
  30 from .transformer import Names
  31 from .glibast import (GLibBoxed, GLibEnum, GLibEnumMember, GLibFlags,
  32                       GLibInterface, GLibObject, GLibSignal, GLibBoxedStruct,
  33                       GLibBoxedUnion, GLibBoxedOther, type_names)
  34 from .utils import extract_libtool, to_underscores, to_underscores_noprefix
  35
  36
  37 SYMBOL_BLACKLIST = [
  38     # These ones break GError conventions
  39     'g_simple_async_result_new_from_error',
  40     'g_simple_async_result_set_from_error',
  41     'g_simple_async_result_propagate_error',
  42     'g_simple_async_result_report_error_in_idle',
  43     'gtk_print_operation_get_error',
  44 ]
  45
  46 SYMBOL_BLACKLIST_RE = [re.compile(x) for x in \
  47                            [r'\w+_marshal_[A-Z]+__', ]]
  48
  49
  50 class Unresolved(object):
  51
  52     def __init__(self, target):
  53         self.target = target
  54
  55
  56 class UnknownTypeError(Exception):
  57     pass
  58
  59
  60 class GLibTransformer(object):
  61
  62     def __init__(self, transformer, noclosure=False):
  63         self._transformer = transformer
  64         self._namespace_name = None
  65         self._names = Names()
  66         self._uscore_type_names = {}
  67         self._libraries = []
  68         self._failed_types = {}
  69         self._boxed_types = {}
  70         self._private_internal_types = {}
  71         self._noclosure = noclosure
  72         self._validating = False
  73
  74     # Public API
  75
  76     def add_library(self, libname):
  77         # For testing mainly.
  78         libtool_libname = 'lib' + libname + '.la'
  79         if os.path.exists(libtool_libname):
  80             found_libname = extract_libtool(libtool_libname)
  81         elif libname.endswith('.la'):
  82             found_libname = extract_libtool(libname)
  83         else:
  84             found_libname = find_library(libname)
  85         if not found_libname:
  86             raise ValueError("Failed to find library: %r" % (libname, ))
  87         self._libraries.append(ctypes.cdll.LoadLibrary(found_libname))
  88
  89     def _print_statistics(self):
  90         nodes = list(self._names.names.itervalues())
  91
  92         def count_type(otype):
  93             return len([x for x in nodes
  94                         if isinstance(x[1], otype)])
  95         objectcount = count_type(GLibObject)
  96         ifacecount = count_type(GLibInterface)
  97         enumcount = count_type(GLibEnum)
  98         print " %d nodes; %d objects, %d interfaces, %d enumsr" \
  99             % (len(nodes), objectcount, ifacecount, enumcount)
 100
 101     def parse(self):
 102         namespace = self._transformer.parse()
 103         self._namespace_name = namespace.name
 104
 105         # First pass: parsing
 106         for node in namespace.nodes:
 107             self._parse_node(node)
 108
 109         # Introspection is done from within parsing
 110
 111         # Second pass: pair boxed structures
 112         for boxed in self._boxed_types.itervalues():
 113             self._pair_boxed_type(boxed)
 114         # Third pass: delete class structures, resolve
 115         # all types we now know about
 116         nodes = list(self._names.names.itervalues())
 117         for (ns, node) in nodes:
 118             try:
 119                 self._resolve_node(node)
 120             except KeyError, e:
 121                 print "WARNING: DELETING node %s: %s" % (node.name, e)
 122                 self._remove_attribute(node.name)
 123             # associate GtkButtonClass with GtkButton
 124             if isinstance(node, Struct):
 125                 self._pair_class_struct(node)
 126         for (ns, alias) in self._names.aliases.itervalues():
 127             self._resolve_alias(alias)
 128
 129         self._print_statistics()
 130         # Fourth pass: ensure all types are known
 131         if not self._noclosure:
 132             self._validate(nodes)
 133
 134         # Create a new namespace with what we found
 135         namespace = Namespace(namespace.name)
 136         namespace.nodes = map(lambda x: x[1], self._names.aliases.itervalues())
 137         for (ns, x) in self._names.names.itervalues():
 138             namespace.nodes.append(x)
 139         return namespace
 140
 141     # Private
 142
 143     def _add_attribute(self, node, replace=False):
 144         node_name = node.name
 145         if (not replace) and node_name in self._names.names:
 146             return
 147         self._names.names[node_name] = (None, node)
 148
 149     def _remove_attribute(self, name):
 150         del self._names.names[name]
 151
 152     def _get_attribute(self, name):
 153         node = self._names.names.get(name)
 154         if node:
 155             return node[1]
 156         return None
 157
 158     def _register_internal_type(self, type_name, node):
 159         self._names.type_names[type_name] = (None, node)
 160         uscored = to_underscores(type_name).lower()
 161         self._uscore_type_names[uscored] = node
 162         # Besides the straight underscore conversion, we also try
 163         # removing the underscores from the namespace as a possible C
 164         # mapping; e.g. it's webkit_web_view, not web_kit_web_view
 165         suffix = self._transformer.strip_namespace_object(type_name)
 166         prefix = type_name[:-len(suffix)]
 167         no_uscore_prefixed = (prefix + '_' + to_underscores(suffix)).lower()
 168         self._uscore_type_names[no_uscore_prefixed] = node
 169
 170     # Helper functions
 171
 172     def _type_from_gtype(self, type_id):
 173         ctype = cgobject.type_name(type_id)
 174         type_name = type_name_from_ctype(ctype)
 175         type_name = type_name.replace('*', '')
 176         type_name = self._resolve_type_name(type_name)
 177         return Type(type_name, ctype)
 178
 179     def _resolve_gtypename(self, gtype_name):
 180         try:
 181             return self._transformer.gtypename_to_giname(gtype_name,
 182                                                          self._names)
 183         except KeyError, e:
 184             return Unresolved(gtype_name)
 185
 186     def _create_gobject(self, node):
 187         type_name = 'G' + node.name
 188         if type_name == 'GObject':
 189             parent_gitype = None
 190             symbol = 'intern'
 191         else:
 192             type_id = cgobject.type_from_name(type_name)
 193             parent_type_name = cgobject.type_name(
 194                 cgobject.type_parent(type_id))
 195             parent_gitype = self._resolve_gtypename(parent_type_name)
 196             symbol = to_underscores(type_name).lower() + '_get_type'
 197         node = GLibObject(node.name, parent_gitype, type_name, symbol)
 198         type_id = cgobject.TYPE_OBJECT
 199         self._introspect_properties(node, type_id)
 200         self._introspect_signals(node, type_id)
 201         self._add_attribute(node)
 202         self._register_internal_type(type_name, node)
 203
 204     # Parser
 205
 206     def _parse_node(self, node):
 207         if isinstance(node, Enum):
 208             self._parse_enum(node)
 209         elif isinstance(node, Function):
 210             self._parse_function(node)
 211         elif isinstance(node, Struct):
 212             self._parse_struct(node)
 213         elif isinstance(node, Callback):
 214             self._parse_callback(node)
 215         elif isinstance(node, Alias):
 216             self._parse_alias(node)
 217         elif isinstance(node, Member):
 218             # FIXME: atk_misc_instance singletons
 219             pass
 220         elif isinstance(node, Union):
 221             self._parse_union(node)
 222         else:
 223             print 'GLIB Transformer: Unhandled node:', node
 224
 225     def _parse_alias(self, alias):
 226         self._names.aliases[alias.name] = (None, alias)
 227
 228     def _parse_enum(self, enum):
 229         self._add_attribute(enum)
 230
 231     def _parse_function(self, func):
 232         if func.symbol in SYMBOL_BLACKLIST:
 233             return
 234         if func.symbol.startswith('_'):
 235             return
 236         for regexp in SYMBOL_BLACKLIST_RE:
 237             if regexp.match(func.symbol):
 238                 return
 239         if self._parse_get_type_function(func):
 240             return
 241
 242         self._add_attribute(func)
 243
 244     def _parse_get_type_function(self, func):
 245         symbol = func.symbol
 246         if not symbol.endswith('_get_type'):
 247             return False
 248         if self._namespace_name == 'GLib':
 249             # No GObjects in GLib
 250             return False
 251         # GType *_get_type(void)
 252         # This is a bit fishy, why do we need all these aliases?
 253         if func.retval.type.name not in ['Type',
 254                                          'GType',
 255                                          'Object.Type',
 256                                          'GObject.Type',
 257                                          'Gtk.Type',
 258                                          'GObject.GType']:
 259             print ("Warning: *_get_type function returns '%r'"
 260                    ", not GObject.Type") % (func.retval.type.name, )
 261             return False
 262         if func.parameters:
 263             return False
 264
 265         if not self._libraries:
 266             print "Warning: No libraries loaded, cannot call %s" % (symbol, )
 267             return False
 268
 269         for library in self._libraries:
 270             try:
 271                 func = getattr(library, symbol)
 272                 break
 273             except AttributeError:
 274                 continue
 275         else:
 276             print 'Warning: could not find symbol: %s' % symbol
 277             name = symbol.replace('_get_type', '')
 278             self._failed_types[name] = True
 279             return False
 280
 281         func.restype = cgobject.GType
 282         func.argtypes = []
 283         type_id = func()
 284         self._introspect_type(type_id, symbol)
 285         return True
 286
 287     def _name_is_internal_gtype(self, giname):
 288         try:
 289             node = self._get_attribute(giname)
 290             return isinstance(node, (GLibObject, GLibInterface,
 291                                      GLibEnum, GLibFlags))
 292         except KeyError, e:
 293             return False
 294
 295     def _parse_method(self, func):
 296         if not func.parameters:
 297             return False
 298         return self._parse_method_common(func, True)
 299
 300     def _parse_constructor(self, func):
 301         return self._parse_method_common(func, False)
 302
 303     def _parse_method_common(self, func, is_method):
 304         # Skip _get_type functions, we processed them
 305         # already
 306         if func.symbol.endswith('_get_type'):
 307             return None
 308         if self._namespace_name == 'GLib':
 309             # No GObjects in GLib
 310             return None
 311
 312         if not is_method:
 313             target_arg = func.retval
 314         else:
 315             target_arg = func.parameters[0]
 316         target_arg.type = self._resolve_param_type(target_arg.type)
 317
 318         if is_method:
 319             # Methods require their first arg to be a known class
 320             # Look at the original C type (before namespace stripping), without
 321             # pointers: GtkButton -> gtk_button_, so we can figure out the
 322             # method name
 323             argtype = target_arg.type.ctype.replace('*', '')
 324             name = self._transformer.strip_namespace_object(argtype)
 325             name_uscore = to_underscores_noprefix(name).lower()
 326             name_offset = func.symbol.find(name_uscore)
 327             if name_offset < 0:
 328                 return None
 329             prefix = func.symbol[:name_offset+len(name_uscore)]
 330         else:
 331             # Constructors must have _new
 332             # Take everything before that as class name
 333             new_idx = func.symbol.find('_new')
 334             if new_idx < 0:
 335                 return None
 336             # Constructors don't return basic types
 337             derefed = self._transformer.follow_aliases(target_arg.type.name,
 338                                                        self._names)
 339             if derefed in type_names:
 340                 #print "NOTE: Rejecting constructor returning basic: %r" \
 341                 #    % (func.symbol, )
 342                 return None
 343             prefix = func.symbol[:new_idx]
 344
 345         klass = None
 346
 347         def valid_matching_klass(tclass):
 348             if tclass is None:
 349                 return False
 350             elif isinstance(klass, (GLibEnum, GLibFlags)):
 351                 return False
 352             elif not isinstance(tclass, (GLibObject, GLibBoxed,
 353                                           GLibInterface)):
 354                 return False
 355             else:
 356                 return True
 357
 358         klass = self._uscore_type_names.get(prefix)
 359         if klass is None:
 360             #print "NOTE: No valid matching class for likely "+\
 361             #    "method or constructor: %r" % (func.symbol, )
 362             return None
 363         # Enums can't have ctors or methods
 364         if isinstance(klass, (GLibEnum, GLibFlags)):
 365             return None
 366
 367         # The _uscore_type_names member holds the plain GLibBoxed
 368         # object; we want to actually use the struct/record associated
 369         if isinstance(klass, GLibBoxed):
 370             name = self._transformer.strip_namespace_object(klass.type_name)
 371             klass = self._get_attribute(name)
 372
 373         if not is_method:
 374             # Interfaces can't have constructors, punt to global scope
 375             if isinstance(klass, (GLibInterface, GLibBoxed)):
 376                 #print "NOTE: Rejecting constructor for"+\
 377                 #    " interface type: %r" % (func.symbol, )
 378                 return None
 379             # TODO - check that the return type is a subclass of the
 380             # class from the prefix
 381             # But for now, ensure that constructor returns are always
 382             # the most concrete class
 383             func.retval.type = Type(klass.name, klass.ctype+'*')
 384
 385         self._remove_attribute(func.name)
 386         # Strip namespace and object prefix: gtk_window_new -> new
 387         func.name = func.symbol[len(prefix)+1:]
 388         if is_method:
 389             klass.methods.append(func)
 390         else:
 391             klass.constructors.append(func)
 392         return func
 393
 394     def _parse_struct(self, struct):
 395         # This is a hack, but GObject is a rather fundamental piece so.
 396         internal_names = ["Object", 'InitiallyUnowned']
 397         g_internal_names = ["G" + x for x in internal_names]
 398         if (self._namespace_name == 'GObject' and
 399             struct.name in internal_names):
 400             self._create_gobject(struct)
 401             return
 402         elif struct.name in g_internal_names:
 403             # Avoid duplicates
 404             return
 405         node = self._names.names.get(struct.name)
 406         if node is None:
 407             self._add_attribute(struct, replace=True)
 408             return
 409         (ns, node) = node
 410         node.fields = struct.fields[:]
 411
 412     def _parse_union(self, union):
 413         node = self._names.names.get(union.name)
 414         if node is None:
 415             self._add_attribute(union, replace=True)
 416             return
 417         (ns, node) = node
 418         node.fields = union.fields[:]
 419
 420     def _parse_callback(self, callback):
 421         self._add_attribute(callback)
 422
 423     def _strip_class_suffix(self, name):
 424         if (name.endswith('Class') or
 425             name.endswith('Iface')):
 426             return name[:-5]
 427         elif name.endswith('Interface'):
 428             return name[:-9]
 429         else:
 430             return name
 431
 432     def _arg_is_failed(self, param):
 433         ctype = self._transformer.ctype_of(param).replace('*', '')
 434         uscored = to_underscores(self._strip_class_suffix(ctype)).lower()
 435         if uscored in self._failed_types:
 436             print "Warning: failed type: %r" % (param, )
 437             return True
 438         return False
 439
 440     def _pair_class_struct(self, maybe_class):
 441         name = self._strip_class_suffix(maybe_class.name)
 442         if name == maybe_class.name:
 443             return
 444
 445         if self._arg_is_failed(maybe_class):
 446             print "WARNING: deleting no-type %r" % (maybe_class.name, )
 447             del self._names.names[maybe_class.name]
 448             return
 449
 450         name = self._resolve_type_name(name)
 451         resolved = self._transformer.strip_namespace_object(name)
 452         pair_class = self._get_attribute(resolved)
 453         if pair_class and isinstance(pair_class,
 454                                      (GLibObject, GLibInterface)):
 455             for field in maybe_class.fields[1:]:
 456                 pair_class.fields.append(field)
 457             return
 458         name = self._transformer.strip_namespace_object(maybe_class.name)
 459         pair_class = self._get_attribute(name)
 460         if pair_class and isinstance(pair_class,
 461                                      (GLibObject, GLibInterface)):
 462
 463             del self._names.names[maybe_class.name]
 464
 465     # Introspection
 466
 467     def _introspect_type(self, type_id, symbol):
 468         fundamental_type_id = cgobject.type_fundamental(type_id)
 469         if (fundamental_type_id == cgobject.TYPE_ENUM or
 470             fundamental_type_id == cgobject.TYPE_FLAGS):
 471             self._introspect_enum(fundamental_type_id, type_id, symbol)
 472         elif fundamental_type_id == cgobject.TYPE_OBJECT:
 473             self._introspect_object(type_id, symbol)
 474         elif fundamental_type_id == cgobject.TYPE_INTERFACE:
 475             self._introspect_interface(type_id, symbol)
 476         elif fundamental_type_id == cgobject.TYPE_BOXED:
 477             self._introspect_boxed(type_id, symbol)
 478         elif fundamental_type_id == cgobject.TYPE_BOXED:
 479             self._introspect_boxed(type_id, symbol)
 480         elif fundamental_type_id == cgobject.TYPE_POINTER:
 481             # FIXME: Should we do something about these?
 482             #        GHashTable, GValue and a few other fundamentals are
 483             #        covered here
 484             return
 485         else:
 486             print 'unhandled GType: %s(%d)' % (cgobject.type_name(type_id),
 487                                                type_id)
 488
 489     def _introspect_enum(self, ftype_id, type_id, symbol):
 490         type_class = cgobject.type_class_ref(type_id)
 491         if type_class is None:
 492             return
 493
 494         members = []
 495         for enum_value in type_class.get_values():
 496             members.append(GLibEnumMember(enum_value.value_nick,
 497                                           enum_value.value,
 498                                           enum_value.value_name,
 499                                           enum_value.value_nick))
 500
 501         klass = (GLibFlags if ftype_id == cgobject.TYPE_FLAGS else GLibEnum)
 502         type_name = cgobject.type_name(type_id)
 503         enum_name = self._transformer.strip_namespace_object(type_name)
 504         node = klass(enum_name, type_name, members, symbol)
 505         self._add_attribute(node, replace=True)
 506         self._register_internal_type(type_name, node)
 507
 508     def _introspect_object(self, type_id, symbol):
 509         type_name = cgobject.type_name(type_id)
 510         # We handle this specially above; in 2.16 and below there
 511         # was no g_object_get_type, for later versions we need
 512         # to skip it
 513         if type_name == 'GObject':
 514             return
 515         parent_type_name = cgobject.type_name(cgobject.type_parent(type_id))
 516         parent_gitype = self._resolve_gtypename(parent_type_name)
 517         node = GLibObject(
 518             self._transformer.strip_namespace_object(type_name),
 519             parent_gitype,
 520             type_name, symbol)
 521         self._introspect_properties(node, type_id)
 522         self._introspect_signals(node, type_id)
 523         self._introspect_implemented_interfaces(node, type_id)
 524         self._add_attribute(node, replace=True)
 525         self._register_internal_type(type_name, node)
 526
 527     def _introspect_interface(self, type_id, symbol):
 528         type_name = cgobject.type_name(type_id)
 529         parent_type_name = cgobject.type_name(cgobject.type_parent(type_id))
 530         if parent_type_name == 'GInterface':
 531             parent_gitype = None
 532         else:
 533             parent_gitype = self._resolve_gtypename(parent_type_name)
 534         node = GLibInterface(
 535             self._transformer.strip_namespace_object(type_name),
 536             parent_gitype,
 537             type_name, symbol)
 538         self._introspect_properties(node, type_id)
 539         self._introspect_signals(node, type_id)
 540         # GtkFileChooserEmbed is an example of a private interface, we
 541         # just filter them out
 542         if symbol.startswith('_'):
 543             print "NOTICE: Marking %s as internal type" % (type_name, )
 544             self._private_internal_types[type_name] = node
 545         else:
 546             self._add_attribute(node, replace=True)
 547             self._register_internal_type(type_name, node)
 548
 549     def _introspect_boxed(self, type_id, symbol):
 550         type_name = cgobject.type_name(type_id)
 551         # This one doesn't go in the main namespace; we associate it with
 552         # the struct or union
 553         node = GLibBoxed(type_name, symbol)
 554         self._boxed_types[node.type_name] = node
 555         self._register_internal_type(type_name, node)
 556
 557     def _introspect_implemented_interfaces(self, node, type_id):
 558         fundamental_type_id = cgobject.type_fundamental(type_id)
 559         if fundamental_type_id != cgobject.TYPE_OBJECT:
 560             raise AssertionError
 561         interfaces = cgobject.type_interfaces(type_id)
 562         gt_interfaces = []
 563         for interface_typeid in interfaces:
 564             iname = cgobject.type_name(interface_typeid)
 565             gitype = self._resolve_gtypename(iname)
 566             gt_interfaces.append(gitype)
 567         node.interfaces = gt_interfaces
 568
 569     def _introspect_properties(self, node, type_id):
 570         fundamental_type_id = cgobject.type_fundamental(type_id)
 571         if fundamental_type_id == cgobject.TYPE_OBJECT:
 572             pspecs = cgobject.object_class_list_properties(type_id)
 573         elif fundamental_type_id == cgobject.TYPE_INTERFACE:
 574             pspecs = cgobject.object_interface_list_properties(type_id)
 575         else:
 576             raise AssertionError
 577
 578         for pspec in pspecs:
 579             if pspec.owner_type != type_id:
 580                 continue
 581             ctype = cgobject.type_name(pspec.value_type)
 582             readable = (pspec.flags & 1) != 0
 583             writable = (pspec.flags & 2) != 0
 584             construct = (pspec.flags & 4) != 0
 585             construct_only = (pspec.flags & 8) != 0
 586             node.properties.append(Property(
 587                 pspec.name,
 588                 type_name_from_ctype(ctype),
 589                 readable, writable, construct, construct_only,
 590                 ctype,
 591                 ))
 592
 593     def _introspect_signals(self, node, type_id):
 594         for signal_info in cgobject.signal_list(type_id):
 595             rtype = self._type_from_gtype(signal_info.return_type)
 596             return_ = Return(rtype)
 597             signal = GLibSignal(signal_info.signal_name, return_)
 598             for i, parameter in enumerate(signal_info.get_params()):
 599                 if i == 0:
 600                     name = 'object'
 601                 else:
 602                     name = 'p%s' % (i-1, )
 603                 ptype = self._type_from_gtype(parameter)
 604                 param = Parameter(name, ptype)
 605                 signal.parameters.append(param)
 606             node.signals.append(signal)
 607
 608     # Resolver
 609
 610     def _resolve_type_name(self, type_name, ctype=None):
 611         # Workaround glib bug #548689, to be included in 2.18.0
 612         if type_name == "GParam":
 613             type_name = "GObject.ParamSpec"
 614
 615         res = self._transformer.resolve_type_name_full
 616         try:
 617             return res(type_name, ctype, self._names)
 618         except KeyError, e:
 619             return self._transformer.resolve_type_name(type_name, ctype)
 620
 621     def _validate_type_name(self, name):
 622         if name in type_names:
 623             return True
 624         if name.find('.') >= 0:
 625             return True
 626         if name in self._names.aliases:
 627             return True
 628         if name in self._names.names:
 629             return True
 630         return False
 631
 632     def _validate_type(self, ptype):
 633         if isinstance(ptype, Sequence):
 634             etype = ptype.element_type
 635             if isinstance(etype, Sequence):
 636                 return self._validate_type(etype)
 637             return self._validate_type_name(etype)
 638         return self._validate_type_name(ptype.name)
 639
 640     def _resolve_param_type_validate(self, ptype):
 641         ptype = self._resolve_param_type(ptype)
 642         if self._validating and not self._validate_type(ptype):
 643             raise UnknownTypeError("Unknown type %r" % (ptype, ))
 644         return ptype
 645
 646     def _resolve_param_type(self, ptype):
 647         try:
 648             return self._transformer.resolve_param_type_full(ptype,
 649                                                              self._names)
 650         except KeyError, e:
 651             return self._transformer.resolve_param_type(ptype)
 652         return ptype
 653
 654     def _resolve_node(self, node):
 655         if isinstance(node, Function):
 656             self._resolve_function_toplevel(node)
 657
 658         elif isinstance(node, Callback):
 659             self._resolve_function(node)
 660         elif isinstance(node, GLibObject):
 661             self._resolve_glib_object(node)
 662         elif isinstance(node, GLibInterface):
 663             self._resolve_glib_interface(node)
 664         elif isinstance(node, Struct):
 665             self._resolve_struct(node)
 666         elif isinstance(node, Union):
 667             self._resolve_union(node)
 668         elif isinstance(node, Alias):
 669             self._resolve_alias(node)
 670
 671     def _resolve_function_toplevel(self, func):
 672         newfunc = self._parse_constructor(func)
 673         if not newfunc:
 674             newfunc = self._parse_method(func)
 675             if not newfunc:
 676                 self._resolve_function(func)
 677                 return
 678         self._resolve_function(newfunc)
 679
 680     def _pair_boxed_type(self, boxed):
 681         name = self._transformer.strip_namespace_object(boxed.type_name)
 682         pair_node = self._get_attribute(name)
 683         if not pair_node:
 684             boxed_item = GLibBoxedOther(name, boxed.type_name,
 685                                         boxed.get_type)
 686         elif isinstance(pair_node, Struct):
 687             boxed_item = GLibBoxedStruct(pair_node.name, boxed.type_name,
 688                                          boxed.get_type)
 689             boxed_item.fields = pair_node.fields
 690         elif isinstance(pair_node, Union):
 691             boxed_item = GLibBoxedUnion(pair_node.name, boxed.type_name,
 692                                          boxed.get_type)
 693             boxed_item.fields = pair_node.fields
 694         else:
 695             return False
 696         self._add_attribute(boxed_item, replace=True)
 697
 698     def _resolve_struct(self, node):
 699         for field in node.fields:
 700             self._resolve_field(field)
 701
 702     def _resolve_union(self, node):
 703         for field in node.fields:
 704             self._resolve_field(field)
 705
 706     def _force_resolve(self, item, allow_unknown=False):
 707         if isinstance(item, Unresolved):
 708             if item.target in self._private_internal_types:
 709                 return None
 710             try:
 711                 return self._transformer.gtypename_to_giname(item.target,
 712                                                              self._names)
 713             except KeyError, e:
 714                 if allow_unknown:
 715                     print "WARNING: Skipping unknown interface %s" % \
 716                         (item.target, )
 717                     return None
 718                 else:
 719                     raise
 720         if item in self._private_internal_types:
 721             return None
 722         return item
 723
 724     def _resolve_glib_interface(self, node):
 725         node.parent = self._force_resolve(node.parent)
 726         self._resolve_methods(node.methods)
 727         self._resolve_properties(node.properties)
 728         self._resolve_signals(node.signals)
 729
 730     def _resolve_glib_object(self, node):
 731         node.parent = self._force_resolve(node.parent)
 732         node.interfaces = filter(None,
 733             [self._force_resolve(x, allow_unknown=True)
 734                                     for x in node.interfaces])
 735         self._resolve_constructors(node.constructors)
 736         self._resolve_methods(node.methods)
 737         self._resolve_properties(node.properties)
 738         self._resolve_signals(node.signals)
 739
 740     def _resolve_glib_boxed(self, node):
 741         self._resolve_constructors(node.constructors)
 742         self._resolve_methods(node.methods)
 743
 744     def _resolve_constructors(self, constructors):
 745         for ctor in constructors:
 746             self._resolve_function(ctor)
 747
 748     def _resolve_methods(self, methods):
 749         for method in methods:
 750             self._resolve_function(method)
 751
 752     def _resolve_signals(self, signals):
 753         for signal in signals:
 754             self._resolve_function(signal)
 755
 756     def _resolve_properties(self, properties):
 757         for prop in properties:
 758             self._resolve_property(prop)
 759
 760     def _resolve_property(self, prop):
 761         prop.type = self._resolve_param_type(prop.type)
 762
 763     def _resolve_function(self, func):
 764         self._resolve_parameters(func.parameters)
 765         func.retval.type = self._resolve_param_type(func.retval.type)
 766
 767     def _resolve_parameters(self, parameters):
 768         for parameter in parameters:
 769             parameter.type = self._resolve_param_type(parameter.type)
 770
 771     def _resolve_field(self, field):
 772         if isinstance(field, Callback):
 773             self._resolve_function(field)
 774             return
 775         field.type = self._resolve_param_type(field.type)
 776
 777     def _resolve_alias(self, alias):
 778         alias.target = self._resolve_type_name(alias.target, alias.target)
 779
 780     # Validation
 781
 782     def _validate(self, nodes):
 783         nodes = list(self._names.names.itervalues())
 784         i = 0
 785         self._validating = True
 786         while True:
 787             initlen = len(nodes)
 788
 789             print "Type resolution; pass=%d" % (i, )
 790             nodes = list(self._names.names.itervalues())
 791             for node in nodes:
 792                 try:
 793                     self._resolve_node(node)
 794                 except UnknownTypeError, e:
 795                     print "WARNING: %s: Deleting %r" % (e, node)
 796                     self._remove_attribute(node.name)
 797             if len(nodes) == initlen:
 798                 break
 799             i += 1
 800             self._print_statistics()
 801         self._validating = False