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
  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         self._uscore_type_names[to_underscores(type_name).lower()] = node
 161         # Besides the straight underscore conversion, we also try
 162         # removing the underscores from the namespace as a possible C
 163         # mapping; e.g. it's webkit_web_view, not web_kit_web_view
 164         suffix = self._transformer.strip_namespace_object(type_name)
 165         prefix = type_name[:-len(suffix)]
 166         no_uscore_prefixed = (prefix + '_' + to_underscores(suffix)).lower()
 167         self._uscore_type_names[no_uscore_prefixed] = node
 168
 169     # Helper functions
 170
 171     def _create_type(self, type_id):
 172         ctype = cgobject.type_name(type_id)
 173         type_name = type_name_from_ctype(ctype)
 174         type_name = type_name.replace('*', '')
 175         type_name = self._resolve_type_name(type_name)
 176         return Type(type_name, ctype)
 177
 178     def _resolve_gtypename(self, gtype_name):
 179         try:
 180             return self._transformer.gtypename_to_giname(gtype_name,
 181                                                          self._names)
 182         except KeyError, e:
 183             return Unresolved(gtype_name)
 184
 185     def _create_gobject(self, node):
 186         type_name = 'G' + node.name
 187         if type_name == 'GObject':
 188             parent_gitype = None
 189             symbol = 'intern'
 190         else:
 191             type_id = cgobject.type_from_name(type_name)
 192             parent_type_name = cgobject.type_name(
 193                 cgobject.type_parent(type_id))
 194             parent_gitype = self._resolve_gtypename(parent_type_name)
 195             symbol = to_underscores(type_name).lower() + '_get_type'
 196         node = GLibObject(node.name, parent_gitype, type_name, symbol)
 197         type_id = cgobject.TYPE_OBJECT
 198         self._introspect_properties(node, type_id)
 199         self._introspect_signals(node, type_id)
 200         self._add_attribute(node)
 201         self._register_internal_type(type_name, node)
 202
 203     # Parser
 204
 205     def _parse_node(self, node):
 206         if isinstance(node, Enum):
 207             self._parse_enum(node)
 208         elif isinstance(node, Function):
 209             self._parse_function(node)
 210         elif isinstance(node, Struct):
 211             self._parse_struct(node)
 212         elif isinstance(node, Callback):
 213             self._parse_callback(node)
 214         elif isinstance(node, Alias):
 215             self._parse_alias(node)
 216         elif isinstance(node, Member):
 217             # FIXME: atk_misc_instance singletons
 218             pass
 219         elif isinstance(node, Union):
 220             self._parse_union(node)
 221         else:
 222             print 'GLIB Transformer: Unhandled node:', node
 223
 224     def _parse_alias(self, alias):
 225         self._names.aliases[alias.name] = (None, alias)
 226
 227     def _parse_enum(self, enum):
 228         self._add_attribute(enum)
 229
 230     def _parse_function(self, func):
 231         if func.symbol in SYMBOL_BLACKLIST:
 232             return
 233         if func.symbol.startswith('_'):
 234             return
 235         for regexp in SYMBOL_BLACKLIST_RE:
 236             if regexp.match(func.symbol):
 237                 return
 238         if self._parse_get_type_function(func):
 239             return
 240
 241         self._add_attribute(func)
 242
 243     def _parse_get_type_function(self, func):
 244         symbol = func.symbol
 245         if not symbol.endswith('_get_type'):
 246             return False
 247         if self._namespace_name == 'GLib':
 248             # No GObjects in GLib
 249             return False
 250         # GType *_get_type(void)
 251         # This is a bit fishy, why do we need all these aliases?
 252         if func.retval.type.name not in ['Type',
 253                                          'GType',
 254                                          'Object.Type',
 255                                          'GObject.Type',
 256                                          'Gtk.Type',
 257                                          'GObject.GType']:
 258             print ("Warning: *_get_type function returns '%r'"
 259                    ", not GObject.Type") % (func.retval.type.name, )
 260             return False
 261         if func.parameters:
 262             return False
 263
 264         if not self._libraries:
 265             print "Warning: No libraries loaded, cannot call %s" % (symbol, )
 266             return False
 267
 268         for library in self._libraries:
 269             try:
 270                 func = getattr(library, symbol)
 271                 break
 272             except AttributeError:
 273                 continue
 274         else:
 275             print 'Warning: could not find symbol: %s' % symbol
 276             name = symbol.replace('_get_type', '')
 277             self._failed_types[name] = True
 278             return False
 279
 280         func.restype = cgobject.GType
 281         func.argtypes = []
 282         type_id = func()
 283         self._introspect_type(type_id, symbol)
 284         return True
 285
 286     def _name_is_internal_gtype(self, giname):
 287         try:
 288             node = self._get_attribute(giname)
 289             return isinstance(node, (GLibObject, GLibInterface,
 290                                      GLibEnum, GLibFlags))
 291         except KeyError, e:
 292             return False
 293
 294     def _parse_method(self, func):
 295         if not func.parameters:
 296             return False
 297         return self._parse_method_common(func, True)
 298
 299     def _parse_constructor(self, func):
 300         return self._parse_method_common(func, False)
 301
 302     def _parse_method_common(self, func, is_method):
 303         # Skip _get_type functions, we processed them
 304         # already
 305         if func.symbol.endswith('_get_type'):
 306             return None
 307         if self._namespace_name == 'GLib':
 308             # No GObjects in GLib
 309             return None
 310
 311         if not is_method:
 312             target_arg = func.retval
 313         else:
 314             target_arg = func.parameters[0]
 315         target_arg.type = self._resolve_param_type(target_arg.type)
 316
 317         if is_method:
 318             # Methods require their first arg to be a known class
 319             # Look at the original C type (before namespace stripping), without
 320             # pointers: GtkButton -> gtk_button_, so we can figure out the
 321             # method name
 322             argtype = target_arg.type.ctype.replace('*', '')
 323             name = self._transformer.strip_namespace_object(argtype)
 324             name_uscore = to_underscores(name).lower()
 325             name_offset = func.symbol.find(name_uscore)
 326             if name_offset < 0:
 327                 return None
 328             prefix = func.symbol[:name_offset+len(name_uscore)]
 329         else:
 330             # Constructors must have _new
 331             # Take everything before that as class name
 332             new_idx = func.symbol.find('_new')
 333             if new_idx < 0:
 334                 return None
 335             # Constructors don't return basic types
 336             derefed = self._transformer.follow_aliases(target_arg.type.name,
 337                                                        self._names)
 338             if derefed in type_names:
 339                 #print "NOTE: Rejecting constructor returning basic: %r" \
 340                 #    % (func.symbol, )
 341                 return None
 342             prefix = func.symbol[:new_idx]
 343
 344         klass = None
 345
 346         def valid_matching_klass(tclass):
 347             if tclass is None:
 348                 return False
 349             elif isinstance(klass, (GLibEnum, GLibFlags)):
 350                 return False
 351             elif not isinstance(tclass, (GLibObject, GLibBoxed,
 352                                           GLibInterface)):
 353                 return False
 354             else:
 355                 return True
 356
 357         klass = self._uscore_type_names.get(prefix)
 358         if klass is None:
 359             #print "NOTE: No valid matching class for likely "+\
 360             #    "method or constructor: %r" % (func.symbol, )
 361             return None
 362         # Enums can't have ctors or methods
 363         if isinstance(klass, (GLibEnum, GLibFlags)):
 364             return None
 365
 366         # The _uscore_type_names member holds the plain GLibBoxed
 367         # object; we want to actually use the struct/record associated
 368         if isinstance(klass, GLibBoxed):
 369             name = self._transformer.strip_namespace_object(klass.type_name)
 370             klass = self._get_attribute(name)
 371
 372         if not is_method:
 373             # Interfaces can't have constructors, punt to global scope
 374             if isinstance(klass, (GLibInterface, GLibBoxed)):
 375                 #print "NOTE: Rejecting constructor for"+\
 376                 #    " interface type: %r" % (func.symbol, )
 377                 return None
 378             # TODO - check that the return type is a subclass of the
 379             # class from the prefix
 380
 381         self._remove_attribute(func.name)
 382         # Strip namespace and object prefix: gtk_window_new -> new
 383         func.name = func.symbol[len(prefix)+1:]
 384         if is_method:
 385             klass.methods.append(func)
 386         else:
 387             klass.constructors.append(func)
 388         return func
 389
 390     def _parse_struct(self, struct):
 391         # This is a hack, but GObject is a rather fundamental piece so.
 392         internal_names = ["Object", 'InitiallyUnowned']
 393         g_internal_names = ["G" + x for x in internal_names]
 394         if (self._namespace_name == 'GObject' and
 395             struct.name in internal_names):
 396             self._create_gobject(struct)
 397             return
 398         elif struct.name in g_internal_names:
 399             # Avoid duplicates
 400             return
 401         node = self._names.names.get(struct.name)
 402         if node is None:
 403             self._add_attribute(struct, replace=True)
 404             return
 405         (ns, node) = node
 406         node.fields = struct.fields[:]
 407
 408     def _parse_union(self, union):
 409         node = self._names.names.get(union.name)
 410         if node is None:
 411             self._add_attribute(union, replace=True)
 412             return
 413         (ns, node) = node
 414         node.fields = union.fields[:]
 415
 416     def _parse_callback(self, callback):
 417         self._add_attribute(callback)
 418
 419     def _strip_class_suffix(self, name):
 420         if (name.endswith('Class') or
 421             name.endswith('Iface')):
 422             return name[:-5]
 423         elif name.endswith('Interface'):
 424             return name[:-9]
 425         else:
 426             return name
 427
 428     def _arg_is_failed(self, param):
 429         ctype = self._transformer.ctype_of(param).replace('*', '')
 430         uscored = to_underscores(self._strip_class_suffix(ctype)).lower()
 431         if uscored in self._failed_types:
 432             print "Warning: failed type: %r" % (param, )
 433             return True
 434         return False
 435
 436     def _pair_class_struct(self, maybe_class):
 437         name = self._strip_class_suffix(maybe_class.name)
 438         if name == maybe_class.name:
 439             return
 440
 441         if self._arg_is_failed(maybe_class):
 442             print "WARNING: deleting no-type %r" % (maybe_class.name, )
 443             del self._names.names[maybe_class.name]
 444             return
 445
 446         name = self._resolve_type_name(name)
 447         resolved = self._transformer.strip_namespace_object(name)
 448         pair_class = self._get_attribute(resolved)
 449         if pair_class and isinstance(pair_class,
 450                                      (GLibObject, GLibInterface)):
 451             for field in maybe_class.fields[1:]:
 452                 pair_class.fields.append(field)
 453             return
 454         name = self._transformer.strip_namespace_object(maybe_class.name)
 455         pair_class = self._get_attribute(name)
 456         if pair_class and isinstance(pair_class,
 457                                      (GLibObject, GLibInterface)):
 458
 459             del self._names.names[maybe_class.name]
 460
 461     # Introspection
 462
 463     def _introspect_type(self, type_id, symbol):
 464         fundamental_type_id = cgobject.type_fundamental(type_id)
 465         if (fundamental_type_id == cgobject.TYPE_ENUM or
 466             fundamental_type_id == cgobject.TYPE_FLAGS):
 467             self._introspect_enum(fundamental_type_id, type_id, symbol)
 468         elif fundamental_type_id == cgobject.TYPE_OBJECT:
 469             self._introspect_object(type_id, symbol)
 470         elif fundamental_type_id == cgobject.TYPE_INTERFACE:
 471             self._introspect_interface(type_id, symbol)
 472         elif fundamental_type_id == cgobject.TYPE_BOXED:
 473             self._introspect_boxed(type_id, symbol)
 474         elif fundamental_type_id == cgobject.TYPE_BOXED:
 475             self._introspect_boxed(type_id, symbol)
 476         elif fundamental_type_id == cgobject.TYPE_POINTER:
 477             # FIXME: Should we do something about these?
 478             #        GHashTable, GValue and a few other fundamentals are
 479             #        covered here
 480             return
 481         else:
 482             print 'unhandled GType: %s(%d)' % (cgobject.type_name(type_id),
 483                                                type_id)
 484
 485     def _introspect_enum(self, ftype_id, type_id, symbol):
 486         type_class = cgobject.type_class_ref(type_id)
 487         if type_class is None:
 488             return
 489
 490         members = []
 491         for enum_value in type_class.get_values():
 492             members.append(GLibEnumMember(enum_value.value_nick,
 493                                           enum_value.value,
 494                                           enum_value.value_name,
 495                                           enum_value.value_nick))
 496
 497         klass = (GLibFlags if ftype_id == cgobject.TYPE_FLAGS else GLibEnum)
 498         type_name = cgobject.type_name(type_id)
 499         enum_name = self._transformer.strip_namespace_object(type_name)
 500         node = klass(enum_name, type_name, members, symbol)
 501         self._add_attribute(node, replace=True)
 502         self._register_internal_type(type_name, node)
 503
 504     def _introspect_object(self, type_id, symbol):
 505         type_name = cgobject.type_name(type_id)
 506         # We handle this specially above; in 2.16 and below there
 507         # was no g_object_get_type, for later versions we need
 508         # to skip it
 509         if type_name == 'GObject':
 510             return
 511         parent_type_name = cgobject.type_name(cgobject.type_parent(type_id))
 512         parent_gitype = self._resolve_gtypename(parent_type_name)
 513         node = GLibObject(
 514             self._transformer.strip_namespace_object(type_name),
 515             parent_gitype,
 516             type_name, symbol)
 517         self._introspect_properties(node, type_id)
 518         self._introspect_signals(node, type_id)
 519         self._introspect_implemented_interfaces(node, type_id)
 520         self._add_attribute(node, replace=True)
 521         self._register_internal_type(type_name, node)
 522
 523     def _introspect_interface(self, type_id, symbol):
 524         type_name = cgobject.type_name(type_id)
 525         parent_type_name = cgobject.type_name(cgobject.type_parent(type_id))
 526         if parent_type_name == 'GInterface':
 527             parent_gitype = None
 528         else:
 529             parent_gitype = self._resolve_gtypename(parent_type_name)
 530         node = GLibInterface(
 531             self._transformer.strip_namespace_object(type_name),
 532             parent_gitype,
 533             type_name, symbol)
 534         self._introspect_properties(node, type_id)
 535         self._introspect_signals(node, type_id)
 536         # GtkFileChooserEmbed is an example of a private interface, we
 537         # just filter them out
 538         if symbol.startswith('_'):
 539             print "NOTICE: Marking %s as internal type" % (type_name, )
 540             self._private_internal_types[type_name] = node
 541         else:
 542             self._add_attribute(node, replace=True)
 543             self._register_internal_type(type_name, node)
 544
 545     def _introspect_boxed(self, type_id, symbol):
 546         type_name = cgobject.type_name(type_id)
 547         # This one doesn't go in the main namespace; we associate it with
 548         # the struct or union
 549         node = GLibBoxed(type_name, symbol)
 550         self._boxed_types[node.type_name] = node
 551         self._register_internal_type(type_name, node)
 552
 553     def _introspect_implemented_interfaces(self, node, type_id):
 554         fundamental_type_id = cgobject.type_fundamental(type_id)
 555         if fundamental_type_id != cgobject.TYPE_OBJECT:
 556             raise AssertionError
 557         interfaces = cgobject.type_interfaces(type_id)
 558         gt_interfaces = []
 559         for interface_typeid in interfaces:
 560             iname = cgobject.type_name(interface_typeid)
 561             gitype = self._resolve_gtypename(iname)
 562             gt_interfaces.append(gitype)
 563         node.interfaces = gt_interfaces
 564
 565     def _introspect_properties(self, node, type_id):
 566         fundamental_type_id = cgobject.type_fundamental(type_id)
 567         if fundamental_type_id == cgobject.TYPE_OBJECT:
 568             pspecs = cgobject.object_class_list_properties(type_id)
 569         elif fundamental_type_id == cgobject.TYPE_INTERFACE:
 570             pspecs = cgobject.object_interface_list_properties(type_id)
 571         else:
 572             raise AssertionError
 573
 574         for pspec in pspecs:
 575             if pspec.owner_type != type_id:
 576                 continue
 577             ctype = cgobject.type_name(pspec.value_type)
 578             readable = (pspec.flags & 1) != 0
 579             writable = (pspec.flags & 2) != 0
 580             construct = (pspec.flags & 4) != 0
 581             construct_only = (pspec.flags & 8) != 0
 582             node.properties.append(Property(
 583                 pspec.name,
 584                 type_name_from_ctype(ctype),
 585                 readable, writable, construct, construct_only,
 586                 ctype,
 587                 ))
 588
 589     def _introspect_signals(self, node, type_id):
 590         for signal_info in cgobject.signal_list(type_id):
 591             rtype = self._create_type(signal_info.return_type)
 592             return_ = Return(rtype)
 593             signal = GLibSignal(signal_info.signal_name, return_)
 594             for i, parameter in enumerate(signal_info.get_params()):
 595                 if i == 0:
 596                     name = 'object'
 597                 else:
 598                     name = 'p%s' % (i-1, )
 599                 ptype = self._create_type(parameter)
 600                 param = Parameter(name, ptype)
 601                 signal.parameters.append(param)
 602             node.signals.append(signal)
 603
 604     # Resolver
 605
 606     def _resolve_type_name(self, type_name, ctype=None):
 607         # Workaround glib bug #548689, to be included in 2.18.0
 608         if type_name == "GParam":
 609             type_name = "GObject.ParamSpec"
 610
 611         res = self._transformer.resolve_type_name_full
 612         try:
 613             return res(type_name, ctype, self._names)
 614         except KeyError, e:
 615             return self._transformer.resolve_type_name(type_name, ctype)
 616
 617     def _validate_type_name(self, name):
 618         if name in type_names:
 619             return True
 620         if name.find('.') >= 0:
 621             return True
 622         if name in self._names.aliases:
 623             return True
 624         if name in self._names.names:
 625             return True
 626         return False
 627
 628     def _validate_type(self, ptype):
 629         if isinstance(ptype, Sequence):
 630             etype = ptype.element_type
 631             if isinstance(etype, Sequence):
 632                 return self._validate_type(etype)
 633             return self._validate_type_name(etype)
 634         return self._validate_type_name(ptype.name)
 635
 636     def _resolve_param_type_validate(self, ptype):
 637         ptype = self._resolve_param_type(ptype)
 638         if self._validating and not self._validate_type(ptype):
 639             raise UnknownTypeError("Unknown type %r" % (ptype, ))
 640         return ptype
 641
 642     def _resolve_param_type(self, ptype):
 643         try:
 644             return self._transformer.resolve_param_type_full(ptype,
 645                                                              self._names)
 646         except KeyError, e:
 647             return self._transformer.resolve_param_type(ptype)
 648         return ptype
 649
 650     def _resolve_node(self, node):
 651         if isinstance(node, Function):
 652             self._resolve_function_toplevel(node)
 653
 654         elif isinstance(node, Callback):
 655             self._resolve_function(node)
 656         elif isinstance(node, GLibObject):
 657             self._resolve_glib_object(node)
 658         elif isinstance(node, GLibInterface):
 659             self._resolve_glib_interface(node)
 660         elif isinstance(node, Struct):
 661             self._resolve_struct(node)
 662         elif isinstance(node, Union):
 663             self._resolve_union(node)
 664         elif isinstance(node, Alias):
 665             self._resolve_alias(node)
 666
 667     def _resolve_function_toplevel(self, func):
 668         newfunc = self._parse_constructor(func)
 669         if not newfunc:
 670             newfunc = self._parse_method(func)
 671             if not newfunc:
 672                 self._resolve_function(func)
 673                 return
 674         self._resolve_function(newfunc)
 675
 676     def _pair_boxed_type(self, boxed):
 677         name = self._transformer.strip_namespace_object(boxed.type_name)
 678         pair_node = self._get_attribute(name)
 679         if not pair_node:
 680             boxed_item = GLibBoxedOther(name, boxed.type_name,
 681                                         boxed.get_type)
 682         elif isinstance(pair_node, Struct):
 683             boxed_item = GLibBoxedStruct(pair_node.name, boxed.type_name,
 684                                          boxed.get_type)
 685             boxed_item.fields = pair_node.fields
 686         elif isinstance(pair_node, Union):
 687             boxed_item = GLibBoxedUnion(pair_node.name, boxed.type_name,
 688                                          boxed.get_type)
 689             boxed_item.fields = pair_node.fields
 690         else:
 691             return False
 692         self._add_attribute(boxed_item, replace=True)
 693
 694     def _resolve_struct(self, node):
 695         for field in node.fields:
 696             self._resolve_field(field)
 697
 698     def _resolve_union(self, node):
 699         for field in node.fields:
 700             self._resolve_field(field)
 701
 702     def _force_resolve(self, item, allow_unknown=False):
 703         if isinstance(item, Unresolved):
 704             if item.target in self._private_internal_types:
 705                 return None
 706             try:
 707                 return self._transformer.gtypename_to_giname(item.target,
 708                                                              self._names)
 709             except KeyError, e:
 710                 if allow_unknown:
 711                     print "WARNING: Skipping unknown interface %s" % \
 712                         (item.target, )
 713                     return None
 714                 else:
 715                     raise
 716         if item in self._private_internal_types:
 717             return None
 718         return item
 719
 720     def _resolve_glib_interface(self, node):
 721         node.parent = self._force_resolve(node.parent)
 722         self._resolve_methods(node.methods)
 723         self._resolve_properties(node.properties)
 724         self._resolve_signals(node.signals)
 725
 726     def _resolve_glib_object(self, node):
 727         node.parent = self._force_resolve(node.parent)
 728         node.interfaces = filter(None,
 729             [self._force_resolve(x, allow_unknown=True)
 730                                     for x in node.interfaces])
 731         self._resolve_constructors(node.constructors)
 732         self._resolve_methods(node.methods)
 733         self._resolve_properties(node.properties)
 734         self._resolve_signals(node.signals)
 735
 736     def _resolve_glib_boxed(self, node):
 737         self._resolve_constructors(node.constructors)
 738         self._resolve_methods(node.methods)
 739
 740     def _resolve_constructors(self, constructors):
 741         for ctor in constructors:
 742             self._resolve_function(ctor)
 743
 744     def _resolve_methods(self, methods):
 745         for method in methods:
 746             self._resolve_function(method)
 747
 748     def _resolve_signals(self, signals):
 749         for signal in signals:
 750             self._resolve_function(signal)
 751
 752     def _resolve_properties(self, properties):
 753         for prop in properties:
 754             self._resolve_property(prop)
 755
 756     def _resolve_property(self, prop):
 757         prop.type = self._resolve_param_type(prop.type)
 758
 759     def _resolve_function(self, func):
 760         self._resolve_parameters(func.parameters)
 761         func.retval.type = self._resolve_param_type(func.retval.type)
 762
 763     def _resolve_parameters(self, parameters):
 764         for parameter in parameters:
 765             parameter.type = self._resolve_param_type(parameter.type)
 766
 767     def _resolve_field(self, field):
 768         if isinstance(field, Callback):
 769             self._resolve_function(field)
 770             return
 771         field.type = self._resolve_param_type(field.type)
 772
 773     def _resolve_alias(self, alias):
 774         alias.target = self._resolve_type_name(alias.target, alias.target)
 775
 776     # Validation
 777
 778     def _validate(self, nodes):
 779         nodes = list(self._names.names.itervalues())
 780         i = 0
 781         self._validating = True
 782         while True:
 783             initlen = len(nodes)
 784
 785             print "Type resolution; pass=%d" % (i, )
 786             nodes = list(self._names.names.itervalues())
 787             for node in nodes:
 788                 try:
 789                     self._resolve_node(node)
 790                 except UnknownTypeError, e:
 791                     print "WARNING: %s: Deleting %r" % (e, node)
 792                     self._remove_attribute(node.name)
 793             if len(nodes) == initlen:
 794                 break
 795             i += 1
 796             self._print_statistics()
 797         self._validating = False