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, Constant, Enum, Function, Member, Namespace,
  28                   Parameter, Property, Return, Struct, Type, Alias,
  29                   Union, Field, type_name_from_ctype,
  30                   default_array_types, TYPE_UINT8, PARAM_DIRECTION_IN)
  31 from .transformer import Names
  32 from .glibast import (GLibBoxed, GLibEnum, GLibEnumMember, GLibFlags,
  33                       GLibInterface, GLibObject, GLibSignal, GLibBoxedStruct,
  34                       GLibBoxedUnion, GLibBoxedOther, type_names)
  35 from .utils import extract_libtool, to_underscores, to_underscores_noprefix
  36
  37 default_array_types['guchar*'] = TYPE_UINT8
  38
  39 SYMBOL_BLACKLIST = [
  40     # These ones break GError conventions
  41     'g_simple_async_result_new_from_error',
  42     'g_simple_async_result_set_from_error',
  43     'g_simple_async_result_propagate_error',
  44     'g_simple_async_result_report_error_in_idle',
  45     'gtk_print_operation_get_error',
  46 ]
  47
  48 SYMBOL_BLACKLIST_RE = [re.compile(x) for x in \
  49                            [r'\w+_marshal_[A-Z]+__', ]]
  50
  51
  52 class Unresolved(object):
  53
  54     def __init__(self, target):
  55         self.target = target
  56
  57
  58 class UnknownTypeError(Exception):
  59     pass
  60
  61
  62 class GLibTransformer(object):
  63
  64     def __init__(self, transformer, noclosure=False):
  65         self._transformer = transformer
  66         self._transformer.set_container_types(['GList*', 'GSList*'],
  67                                               ['GHashtable*'])
  68         self._namespace_name = None
  69         self._names = Names()
  70         self._uscore_type_names = {}
  71         self._libraries = []
  72         self._failed_types = {}
  73         self._boxed_types = {}
  74         self._private_internal_types = {}
  75         self._noclosure = noclosure
  76         self._validating = False
  77
  78     # Public API
  79
  80     def add_library(self, libname):
  81         # For testing mainly.
  82         libtool_libname = 'lib' + libname + '.la'
  83         if os.path.exists(libtool_libname):
  84             found_libname = extract_libtool(libtool_libname)
  85         elif libname.endswith('.la'):
  86             found_libname = extract_libtool(libname)
  87         else:
  88             found_libname = find_library(libname)
  89         if not found_libname:
  90             raise ValueError("Failed to find library: %r" % (libname, ))
  91         self._libraries.append(ctypes.cdll.LoadLibrary(found_libname))
  92
  93     def _print_statistics(self):
  94         nodes = list(self._names.names.itervalues())
  95
  96         def count_type(otype):
  97             return len([x for x in nodes
  98                         if isinstance(x[1], otype)])
  99         objectcount = count_type(GLibObject)
 100         ifacecount = count_type(GLibInterface)
 101         enumcount = count_type(GLibEnum)
 102         print " %d nodes; %d objects, %d interfaces, %d enums" \
 103             % (len(nodes), objectcount, ifacecount, enumcount)
 104
 105     def parse(self):
 106         namespace = self._transformer.parse()
 107         self._namespace_name = namespace.name
 108
 109         # First pass: parsing
 110         for node in namespace.nodes:
 111             self._parse_node(node)
 112
 113         # We don't want an alias for this - it's handled specially in
 114         # the typelib compiler.
 115         if namespace.name == 'GObject':
 116             del self._names.aliases['Type']
 117
 118         # Introspection is done from within parsing
 119
 120         # Second pass: pair boxed structures
 121         for boxed in self._boxed_types.itervalues():
 122             self._pair_boxed_type(boxed)
 123         # Third pass: delete class structures, resolve
 124         # all types we now know about
 125         nodes = list(self._names.names.itervalues())
 126         for (ns, node) in nodes:
 127             try:
 128                 self._resolve_node(node)
 129             except KeyError, e:
 130                 print "WARNING: DELETING node %s: %s" % (node.name, e)
 131                 self._remove_attribute(node.name)
 132             # associate GtkButtonClass with GtkButton
 133             if isinstance(node, Struct):
 134                 self._pair_class_struct(node)
 135         for (ns, alias) in self._names.aliases.itervalues():
 136             self._resolve_alias(alias)
 137
 138         self._print_statistics()
 139         # Fourth pass: ensure all types are known
 140         if not self._noclosure:
 141             self._validate(nodes)
 142
 143         # Create a new namespace with what we found
 144         namespace = Namespace(namespace.name, namespace.version)
 145         namespace.nodes = map(lambda x: x[1], self._names.aliases.itervalues())
 146         for (ns, x) in self._names.names.itervalues():
 147             namespace.nodes.append(x)
 148         return namespace
 149
 150     # Private
 151
 152     def _add_attribute(self, node, replace=False):
 153         node_name = node.name
 154         if (not replace) and node_name in self._names.names:
 155             return
 156         self._names.names[node_name] = (None, node)
 157
 158     def _remove_attribute(self, name):
 159         del self._names.names[name]
 160
 161     def _get_attribute(self, name):
 162         node = self._names.names.get(name)
 163         if node:
 164             return node[1]
 165         return None
 166
 167     def _register_internal_type(self, type_name, node):
 168         self._names.type_names[type_name] = (None, node)
 169         uscored = to_underscores(type_name).lower()
 170         self._uscore_type_names[uscored] = node
 171         # Besides the straight underscore conversion, we also try
 172         # removing the underscores from the namespace as a possible C
 173         # mapping; e.g. it's webkit_web_view, not web_kit_web_view
 174         suffix = self._transformer.remove_prefix(type_name)
 175         prefix = type_name[:-len(suffix)]
 176         no_uscore_prefixed = (prefix + '_' + to_underscores(suffix)).lower()
 177         self._uscore_type_names[no_uscore_prefixed] = node
 178
 179     # Helper functions
 180
 181     def _type_from_gtype(self, type_id):
 182         ctype = cgobject.type_name(type_id)
 183         type_name = type_name_from_ctype(ctype)
 184         type_name = type_name.replace('*', '')
 185         type_name = self._resolve_type_name(type_name)
 186         return Type(type_name, ctype)
 187
 188     def _resolve_gtypename(self, gtype_name):
 189         try:
 190             return self._transformer.gtypename_to_giname(gtype_name,
 191                                                          self._names)
 192         except KeyError, e:
 193             return Unresolved(gtype_name)
 194
 195     def _create_gobject(self, node):
 196         type_name = 'G' + node.name
 197         if type_name == 'GObject':
 198             parent_gitype = None
 199             symbol = 'intern'
 200         else:
 201             type_id = cgobject.type_from_name(type_name)
 202             parent_type_name = cgobject.type_name(
 203                 cgobject.type_parent(type_id))
 204             parent_gitype = self._resolve_gtypename(parent_type_name)
 205             symbol = to_underscores(type_name).lower() + '_get_type'
 206         node = GLibObject(node.name, parent_gitype, type_name, symbol, True)
 207         type_id = cgobject.TYPE_OBJECT
 208         self._introspect_properties(node, type_id)
 209         self._introspect_signals(node, type_id)
 210         self._add_attribute(node)
 211         self._register_internal_type(type_name, node)
 212
 213     # Parser
 214
 215     def _parse_node(self, node):
 216         if isinstance(node, Enum):
 217             self._parse_enum(node)
 218         elif isinstance(node, Function):
 219             self._parse_function(node)
 220         elif isinstance(node, Struct):
 221             self._parse_struct(node)
 222         elif isinstance(node, Callback):
 223             self._parse_callback(node)
 224         elif isinstance(node, Alias):
 225             self._parse_alias(node)
 226         elif isinstance(node, Member):
 227             # FIXME: atk_misc_instance singletons
 228             pass
 229         elif isinstance(node, Union):
 230             self._parse_union(node)
 231         elif isinstance(node, Constant):
 232             self._parse_constant(node)
 233         else:
 234             print 'GLIB Transformer: Unhandled node:', node
 235
 236     def _parse_alias(self, alias):
 237         self._names.aliases[alias.name] = (None, alias)
 238
 239     def _parse_enum(self, enum):
 240         self._add_attribute(enum)
 241
 242     def _parse_constant(self, constant):
 243         self._add_attribute(constant)
 244
 245     def _parse_function(self, func):
 246         if func.symbol in SYMBOL_BLACKLIST:
 247             return
 248         if func.symbol.startswith('_'):
 249             return
 250         for regexp in SYMBOL_BLACKLIST_RE:
 251             if regexp.match(func.symbol):
 252                 return
 253         if self._parse_get_type_function(func):
 254             return
 255
 256         self._add_attribute(func)
 257
 258     def _parse_get_type_function(self, func):
 259         symbol = func.symbol
 260         if not symbol.endswith('_get_type'):
 261             return False
 262         if self._namespace_name == 'GLib':
 263             # No GObjects in GLib
 264             return False
 265         # GType *_get_type(void)
 266         if func.retval.type.name not in ['Type',
 267                                          'GType',
 268                                          'GObject.Type',
 269                                          'Gtk.Type']:
 270             print ("Warning: *_get_type function returns '%r'"
 271                    ", not GObject.Type") % (func.retval.type.name, )
 272             return False
 273         if func.parameters:
 274             return False
 275
 276         if not self._libraries:
 277             print "Warning: No libraries loaded, cannot call %s" % (symbol, )
 278             return False
 279
 280         for library in self._libraries:
 281             try:
 282                 func = getattr(library, symbol)
 283                 break
 284             except AttributeError:
 285                 continue
 286         else:
 287             print 'Warning: could not find symbol: %s' % symbol
 288             name = symbol.replace('_get_type', '')
 289             self._failed_types[name] = True
 290             return False
 291
 292         func.restype = cgobject.GType
 293         func.argtypes = []
 294         type_id = func()
 295         self._introspect_type(type_id, symbol)
 296         return True
 297
 298     def _name_is_internal_gtype(self, giname):
 299         try:
 300             node = self._get_attribute(giname)
 301             return isinstance(node, (GLibObject, GLibInterface,
 302                                      GLibBoxed, GLibEnum, GLibFlags))
 303         except KeyError, e:
 304             return False
 305
 306     def _parse_method(self, func):
 307         if not func.parameters:
 308             return False
 309         return self._parse_method_common(func, True)
 310
 311     def _parse_constructor(self, func):
 312         return self._parse_method_common(func, False)
 313
 314     def _parse_method_common(self, func, is_method):
 315         # Skip _get_type functions, we processed them
 316         # already
 317         if func.symbol.endswith('_get_type'):
 318             return None
 319         if self._namespace_name == 'GLib':
 320             # No GObjects in GLib
 321             return None
 322
 323         if not is_method:
 324             target_arg = func.retval
 325         else:
 326             target_arg = func.parameters[0]
 327         target_arg.type = self._resolve_param_type(target_arg.type)
 328
 329         if is_method:
 330             # Methods require their first arg to be a known class
 331             # Look at the original C type (before namespace stripping), without
 332             # pointers: GtkButton -> gtk_button_, so we can figure out the
 333             # method name
 334             argtype = target_arg.type.ctype.replace('*', '')
 335             name = self._transformer.remove_prefix(argtype)
 336             name_uscore = to_underscores_noprefix(name).lower()
 337             name_offset = func.symbol.find(name_uscore)
 338             if name_offset < 0:
 339                 return None
 340             prefix = func.symbol[:name_offset+len(name_uscore)]
 341         else:
 342             # Constructors must have _new
 343             # Take everything before that as class name
 344             new_idx = func.symbol.find('_new')
 345             if new_idx < 0:
 346                 return None
 347             # Constructors don't return basic types
 348             derefed = self._transformer.follow_aliases(target_arg.type.name,
 349                                                        self._names)
 350             if derefed in type_names:
 351                 #print "NOTE: Rejecting constructor returning basic: %r" \
 352                 #    % (func.symbol, )
 353                 return None
 354             prefix = func.symbol[:new_idx]
 355
 356         klass = None
 357
 358         def valid_matching_klass(tclass):
 359             if tclass is None:
 360                 return False
 361             elif isinstance(klass, (GLibEnum, GLibFlags)):
 362                 return False
 363             elif not isinstance(tclass, (GLibObject, GLibBoxed,
 364                                           GLibInterface)):
 365                 return False
 366             else:
 367                 return True
 368
 369         klass = self._uscore_type_names.get(prefix)
 370         if klass is None:
 371             #print "NOTE: No valid matching class for likely "+\
 372             #    "method or constructor: %r" % (func.symbol, )
 373             return None
 374         # Enums can't have ctors or methods
 375         if isinstance(klass, (GLibEnum, GLibFlags)):
 376             return None
 377
 378         # The _uscore_type_names member holds the plain GLibBoxed
 379         # object; we want to actually use the struct/record associated
 380         if isinstance(klass, GLibBoxed):
 381             name = self._transformer.remove_prefix(klass.type_name)
 382             klass = self._get_attribute(name)
 383
 384         if not is_method:
 385             # Interfaces can't have constructors, punt to global scope
 386             if isinstance(klass, GLibInterface):
 387                 #print "NOTE: Rejecting constructor for"+\
 388                 #    " interface type: %r" % (func.symbol, )
 389                 return None
 390             # TODO - check that the return type is a subclass of the
 391             # class from the prefix
 392             # But for now, ensure that constructor returns are always
 393             # the most concrete class
 394             func.retval.type = Type(klass.name,
 395                                     self._transformer.ctype_of(klass)+'*')
 396
 397         self._remove_attribute(func.name)
 398         # Strip namespace and object prefix: gtk_window_new -> new
 399         func.name = func.symbol[len(prefix)+1:]
 400         if is_method:
 401             # We don't need the "this" parameter
 402             del func.parameters[0]
 403             klass.methods.append(func)
 404         else:
 405             klass.constructors.append(func)
 406         return func
 407
 408     def _parse_struct(self, struct):
 409         # This is a hack, but GObject is a rather fundamental piece so.
 410         internal_names = ["Object", 'InitiallyUnowned']
 411         g_internal_names = ["G" + x for x in internal_names]
 412         if (self._namespace_name == 'GObject' and
 413             struct.name in internal_names):
 414             self._create_gobject(struct)
 415             return
 416         elif struct.name in g_internal_names:
 417             # Avoid duplicates
 418             return
 419         node = self._names.names.get(struct.name)
 420         if node is None:
 421             self._add_attribute(struct, replace=True)
 422             return
 423         (ns, node) = node
 424         node.fields = struct.fields[:]
 425
 426     def _parse_union(self, union):
 427         node = self._names.names.get(union.name)
 428         if node is None:
 429             self._add_attribute(union, replace=True)
 430             return
 431         (ns, node) = node
 432         node.fields = union.fields[:]
 433
 434     def _parse_callback(self, callback):
 435         self._add_attribute(callback)
 436
 437     def _strip_class_suffix(self, name):
 438         if (name.endswith('Class') or
 439             name.endswith('Iface')):
 440             return name[:-5]
 441         elif name.endswith('Interface'):
 442             return name[:-9]
 443         else:
 444             return name
 445
 446     def _arg_is_failed(self, param):
 447         ctype = self._transformer.ctype_of(param).replace('*', '')
 448         uscored = to_underscores(self._strip_class_suffix(ctype)).lower()
 449         if uscored in self._failed_types:
 450             print "Warning: failed type: %r" % (param, )
 451             return True
 452         return False
 453
 454     def _pair_class_struct(self, maybe_class):
 455         name = self._strip_class_suffix(maybe_class.name)
 456         if name == maybe_class.name:
 457             return
 458
 459         if self._arg_is_failed(maybe_class):
 460             print "WARNING: deleting no-type %r" % (maybe_class.name, )
 461             del self._names.names[maybe_class.name]
 462             return
 463
 464         # Object class fields are assumed to be read-only
 465         # (see also _introspect_object and transformer.py)
 466         for field in maybe_class.fields:
 467             if isinstance(field, Field):
 468                 field.writable = False
 469
 470         name = self._resolve_type_name(name)
 471         resolved = self._transformer.remove_prefix(name)
 472         pair_class = self._get_attribute(resolved)
 473         if pair_class and isinstance(pair_class,
 474                                      (GLibObject, GLibInterface)):
 475             for field in maybe_class.fields[1:]:
 476                 pair_class.fields.append(field)
 477             return
 478         name = self._transformer.remove_prefix(maybe_class.name)
 479         pair_class = self._get_attribute(name)
 480         if pair_class and isinstance(pair_class,
 481                                      (GLibObject, GLibInterface)):
 482
 483             del self._names.names[maybe_class.name]
 484
 485     # Introspection
 486
 487     def _introspect_type(self, type_id, symbol):
 488         fundamental_type_id = cgobject.type_fundamental(type_id)
 489         if (fundamental_type_id == cgobject.TYPE_ENUM or
 490             fundamental_type_id == cgobject.TYPE_FLAGS):
 491             self._introspect_enum(fundamental_type_id, type_id, symbol)
 492         elif fundamental_type_id == cgobject.TYPE_OBJECT:
 493             self._introspect_object(type_id, symbol)
 494         elif fundamental_type_id == cgobject.TYPE_INTERFACE:
 495             self._introspect_interface(type_id, symbol)
 496         elif fundamental_type_id == cgobject.TYPE_BOXED:
 497             self._introspect_boxed(type_id, symbol)
 498         elif fundamental_type_id == cgobject.TYPE_BOXED:
 499             self._introspect_boxed(type_id, symbol)
 500         elif fundamental_type_id == cgobject.TYPE_POINTER:
 501             # FIXME: Should we do something about these?
 502             #        GHashTable, GValue and a few other fundamentals are
 503             #        covered here
 504             return
 505         else:
 506             print 'unhandled GType: %s(%d)' % (cgobject.type_name(type_id),
 507                                                type_id)
 508
 509     def _introspect_enum(self, ftype_id, type_id, symbol):
 510         type_class = cgobject.type_class_ref(type_id)
 511         if type_class is None:
 512             return
 513
 514         members = []
 515         for enum_value in type_class.get_values():
 516             members.append(GLibEnumMember(enum_value.value_nick,
 517                                           enum_value.value,
 518                                           enum_value.value_name,
 519                                           enum_value.value_nick))
 520
 521         klass = (GLibFlags if ftype_id == cgobject.TYPE_FLAGS else GLibEnum)
 522         type_name = cgobject.type_name(type_id)
 523         enum_name = self._transformer.remove_prefix(type_name)
 524         node = klass(enum_name, type_name, members, symbol)
 525         self._add_attribute(node, replace=True)
 526         self._register_internal_type(type_name, node)
 527
 528     def _introspect_object(self, type_id, symbol):
 529         type_name = cgobject.type_name(type_id)
 530         # We handle this specially above; in 2.16 and below there
 531         # was no g_object_get_type, for later versions we need
 532         # to skip it
 533         if type_name == 'GObject':
 534             return
 535         parent_type_name = cgobject.type_name(cgobject.type_parent(type_id))
 536         parent_gitype = self._resolve_gtypename(parent_type_name)
 537         is_abstract = cgobject.type_is_abstract(type_id)
 538         node = GLibObject(
 539             self._transformer.remove_prefix(type_name),
 540             parent_gitype,
 541             type_name,
 542             symbol, is_abstract)
 543         self._introspect_properties(node, type_id)
 544         self._introspect_signals(node, type_id)
 545         self._introspect_implemented_interfaces(node, type_id)
 546
 547         # add struct fields
 548         struct = self._get_attribute(node.name)
 549         if struct is not None:
 550             node.fields = struct.fields
 551             for field in node.fields:
 552                 if isinstance(field, Field):
 553                     # Object instance fields are assumed to be read-only
 554                     # (see also _pair_class_struct and transformer.py)
 555                     field.writable = False
 556
 557         self._add_attribute(node, replace=True)
 558         self._register_internal_type(type_name, node)
 559
 560     def _introspect_interface(self, type_id, symbol):
 561         type_name = cgobject.type_name(type_id)
 562         parent_type_name = cgobject.type_name(cgobject.type_parent(type_id))
 563         if parent_type_name == 'GInterface':
 564             parent_gitype = None
 565         else:
 566             parent_gitype = self._resolve_gtypename(parent_type_name)
 567         node = GLibInterface(
 568             self._transformer.remove_prefix(type_name),
 569             parent_gitype,
 570             type_name, symbol)
 571         self._introspect_properties(node, type_id)
 572         self._introspect_signals(node, type_id)
 573         # GtkFileChooserEmbed is an example of a private interface, we
 574         # just filter them out
 575         if symbol.startswith('_'):
 576             print "NOTICE: Marking %s as internal type" % (type_name, )
 577             self._private_internal_types[type_name] = node
 578         else:
 579             self._add_attribute(node, replace=True)
 580             self._register_internal_type(type_name, node)
 581
 582     def _introspect_boxed(self, type_id, symbol):
 583         type_name = cgobject.type_name(type_id)
 584         # This one doesn't go in the main namespace; we associate it with
 585         # the struct or union
 586         node = GLibBoxed(type_name, symbol)
 587         self._boxed_types[node.type_name] = node
 588         self._register_internal_type(type_name, node)
 589
 590     def _introspect_implemented_interfaces(self, node, type_id):
 591         fundamental_type_id = cgobject.type_fundamental(type_id)
 592         if fundamental_type_id != cgobject.TYPE_OBJECT:
 593             raise AssertionError
 594         interfaces = cgobject.type_interfaces(type_id)
 595         gt_interfaces = []
 596         for interface_typeid in interfaces:
 597             iname = cgobject.type_name(interface_typeid)
 598             gitype = self._resolve_gtypename(iname)
 599             gt_interfaces.append(gitype)
 600         node.interfaces = gt_interfaces
 601
 602     def _introspect_properties(self, node, type_id):
 603         fundamental_type_id = cgobject.type_fundamental(type_id)
 604         if fundamental_type_id == cgobject.TYPE_OBJECT:
 605             pspecs = cgobject.object_class_list_properties(type_id)
 606         elif fundamental_type_id == cgobject.TYPE_INTERFACE:
 607             pspecs = cgobject.object_interface_list_properties(type_id)
 608         else:
 609             raise AssertionError
 610
 611         for pspec in pspecs:
 612             if pspec.owner_type != type_id:
 613                 continue
 614             ctype = cgobject.type_name(pspec.value_type)
 615             readable = (pspec.flags & 1) != 0
 616             writable = (pspec.flags & 2) != 0
 617             construct = (pspec.flags & 4) != 0
 618             construct_only = (pspec.flags & 8) != 0
 619             node.properties.append(Property(
 620                 pspec.name,
 621                 type_name_from_ctype(ctype),
 622                 readable, writable, construct, construct_only,
 623                 ctype,
 624                 ))
 625
 626     def _introspect_signals(self, node, type_id):
 627         for signal_info in cgobject.signal_list(type_id):
 628             rtype = self._type_from_gtype(signal_info.return_type)
 629             return_ = Return(rtype)
 630             signal = GLibSignal(signal_info.signal_name, return_)
 631             for i, parameter in enumerate(signal_info.get_params()):
 632                 if i == 0:
 633                     name = 'object'
 634                 else:
 635                     name = 'p%s' % (i-1, )
 636                 ptype = self._type_from_gtype(parameter)
 637                 param = Parameter(name, ptype)
 638                 signal.parameters.append(param)
 639             node.signals.append(signal)
 640
 641     # Resolver
 642
 643     def _resolve_type_name(self, type_name, ctype=None):
 644         # Workaround glib bug #548689, to be included in 2.18.0
 645         if type_name == "GParam":
 646             type_name = "GObject.ParamSpec"
 647
 648         res = self._transformer.resolve_type_name_full
 649         try:
 650             return res(type_name, ctype, self._names)
 651         except KeyError, e:
 652             return self._transformer.resolve_type_name(type_name, ctype)
 653
 654     def _resolve_param_type(self, ptype, **kwargs):
 655         return self._transformer.resolve_param_type_full(ptype,
 656                                                          self._names,
 657                                                          **kwargs)
 658
 659     def _resolve_node(self, node):
 660         if isinstance(node, Function):
 661             self._resolve_function_toplevel(node)
 662
 663         elif isinstance(node, Callback):
 664             self._resolve_function(node)
 665         elif isinstance(node, GLibObject):
 666             self._resolve_glib_object(node)
 667         elif isinstance(node, GLibInterface):
 668             self._resolve_glib_interface(node)
 669         elif isinstance(node, Struct):
 670             self._resolve_struct(node)
 671         elif isinstance(node, Union):
 672             self._resolve_union(node)
 673         elif isinstance(node, Alias):
 674             self._resolve_alias(node)
 675
 676     def _resolve_function_toplevel(self, func):
 677         newfunc = self._parse_constructor(func)
 678         if not newfunc:
 679             newfunc = self._parse_method(func)
 680             if not newfunc:
 681                 self._resolve_function(func)
 682                 return
 683         self._resolve_function(newfunc)
 684
 685     def _pair_boxed_type(self, boxed):
 686         name = self._transformer.remove_prefix(boxed.type_name)
 687         pair_node = self._get_attribute(name)
 688         if not pair_node:
 689             boxed_item = GLibBoxedOther(name, boxed.type_name,
 690                                         boxed.get_type)
 691         elif isinstance(pair_node, Struct):
 692             boxed_item = GLibBoxedStruct(pair_node.name, boxed.type_name,
 693                                          boxed.get_type)
 694             boxed_item.fields = pair_node.fields
 695         elif isinstance(pair_node, Union):
 696             boxed_item = GLibBoxedUnion(pair_node.name, boxed.type_name,
 697                                          boxed.get_type)
 698             boxed_item.fields = pair_node.fields
 699         else:
 700             return False
 701         self._add_attribute(boxed_item, replace=True)
 702
 703     def _resolve_struct(self, node):
 704         for field in node.fields:
 705             self._resolve_field(field)
 706
 707     def _resolve_union(self, node):
 708         for field in node.fields:
 709             self._resolve_field(field)
 710
 711     def _force_resolve(self, item, allow_unknown=False):
 712         if isinstance(item, Unresolved):
 713             if item.target in self._private_internal_types:
 714                 return None
 715             try:
 716                 return self._transformer.gtypename_to_giname(item.target,
 717                                                              self._names)
 718             except KeyError, e:
 719                 if allow_unknown:
 720                     print "WARNING: Skipping unknown interface %s" % \
 721                         (item.target, )
 722                     return None
 723                 else:
 724                     raise
 725         if item in self._private_internal_types:
 726             return None
 727         return item
 728
 729     def _resolve_glib_interface(self, node):
 730         node.parent = self._force_resolve(node.parent)
 731         self._resolve_methods(node.methods)
 732         self._resolve_properties(node.properties, node)
 733         self._resolve_signals(node.signals)
 734
 735     def _resolve_glib_object(self, node):
 736         node.parent = self._force_resolve(node.parent)
 737         node.interfaces = filter(None,
 738             [self._force_resolve(x, allow_unknown=True)
 739                                     for x in node.interfaces])
 740         self._resolve_constructors(node.constructors)
 741         self._resolve_methods(node.methods)
 742         self._resolve_properties(node.properties, node)
 743         self._resolve_signals(node.signals)
 744         for field in node.fields:
 745             self._resolve_field(field)
 746
 747     def _resolve_glib_boxed(self, node):
 748         self._resolve_constructors(node.constructors)
 749         self._resolve_methods(node.methods)
 750
 751     def _resolve_constructors(self, constructors):
 752         for ctor in constructors:
 753             self._resolve_function(ctor)
 754
 755     def _resolve_methods(self, methods):
 756         for method in methods:
 757             self._resolve_function(method)
 758
 759     def _resolve_signals(self, signals):
 760         for signal in signals:
 761             self._resolve_function(signal)
 762
 763     def _resolve_properties(self, properties, context):
 764         failed = []
 765         for prop in properties:
 766             try:
 767                 self._resolve_property(prop)
 768             except KeyError, e:
 769                 failed.append(prop)
 770         for fail in failed:
 771             print ("WARNING: Deleting object property %r (of %r)" +\
 772                        "with unknown type") % (fail, context)
 773             properties.remove(fail)
 774
 775     def _resolve_property(self, prop):
 776         prop.type = self._resolve_param_type(prop.type, allow_invalid=False)
 777
 778     def _adjust_transfer(self, param):
 779         # Do GLib/GObject-specific type transformations here
 780
 781         # Default to full transfer for GObjects
 782         if isinstance(param, Parameter):
 783             is_out = (param.direction != PARAM_DIRECTION_IN)
 784         else:
 785             is_out = True
 786         if (is_out and
 787             param.transfer is None and
 788             (param.type.name == 'GObject.Object' or
 789              (self._namespace_name == 'GObject'
 790               and param.type.name == 'Object'))):
 791             param.transfer = 'full'
 792
 793     def _adjust_throws(self, func):
 794         if func.parameters == []:
 795             return
 796
 797         last_param = func.parameters.pop()
 798
 799         if (last_param.type.name == 'GLib.Error' or
 800             (self._namespace_name == 'GLib' and
 801              last_param.type.name == 'Error')):
 802             func.throws = True
 803         else:
 804             func.parameters.append(last_param)
 805
 806     def _resolve_function(self, func):
 807         self._resolve_parameters(func.parameters)
 808         func.retval.type = self._resolve_param_type(func.retval.type)
 809         self._adjust_throws(func)
 810         self._adjust_transfer(func.retval)
 811
 812     def _resolve_parameters(self, parameters):
 813         for parameter in parameters:
 814             parameter.type = self._resolve_param_type(parameter.type)
 815             self._adjust_transfer(parameter)
 816
 817     def _resolve_field(self, field):
 818         if isinstance(field, Callback):
 819             self._resolve_function(field)
 820             return
 821         field.type = self._resolve_param_type(field.type)
 822
 823     def _resolve_alias(self, alias):
 824         alias.target = self._resolve_type_name(alias.target, alias.target)
 825
 826     # Validation
 827
 828     def _validate(self, nodes):
 829         nodes = list(self._names.names.itervalues())
 830         i = 0
 831         self._validating = True
 832         while True:
 833             initlen = len(nodes)
 834
 835             print "Type resolution; pass=%d" % (i, )
 836             nodes = list(self._names.names.itervalues())
 837             for node in nodes:
 838                 try:
 839                     self._resolve_node(node)
 840                 except UnknownTypeError, e:
 841                     print "WARNING: %s: Deleting %r" % (e, node)
 842                     self._remove_attribute(node.name)
 843             if len(nodes) == initlen:
 844                 break
 845             i += 1
 846             self._print_statistics()
 847         self._validating = False