tools/glib-ginterface-gen.py

   1 #!/usr/bin/python
   2
   3 # glib-ginterface-gen.py: service-side interface generator
   4 #
   5 # Generate dbus-glib 0.x service GInterfaces from the Telepathy specification.
   6 # The master copy of this program is in the telepathy-glib repository -
   7 # please make any changes there.
   8 #
   9 # Copyright (C) 2006, 2007 Collabora Limited
  10 #
  11 # This library is free software; you can redistribute it and/or
  12 # modify it under the terms of the GNU Lesser General Public
  13 # License as published by the Free Software Foundation; either
  14 # version 2.1 of the License, or (at your option) any later version.
  15 #
  16 # This library is distributed in the hope that it will be useful,
  17 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19 # Lesser General Public License for more details.
  20 #
  21 # You should have received a copy of the GNU Lesser General Public
  22 # License along with this library; if not, write to the Free Software
  23 # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  24
  25 import sys
  26 import os.path
  27 import xml.dom.minidom
  28
  29 from libtpcodegen import file_set_contents, key_by_name, u
  30 from libglibcodegen import Signature, type_to_gtype, \
  31         NS_TP, dbus_gutils_wincaps_to_uscore
  32
  33
  34 NS_TP = "http://telepathy.freedesktop.org/wiki/DbusSpec#extensions-v0"
  35
  36 def get_emits_changed(node):
  37     try:
  38         return [
  39             annotation.getAttribute('value')
  40             for annotation in node.getElementsByTagName('annotation')
  41             if annotation.getAttribute('name') == 'org.freedesktop.DBus.Property.EmitsChangedSignal'
  42             ][0]
  43     except IndexError:
  44         return None
  45
  46 class Generator(object):
  47
  48     def __init__(self, dom, prefix, basename, signal_marshal_prefix,
  49                  headers, end_headers, not_implemented_func,
  50                  allow_havoc):
  51         self.dom = dom
  52         self.__header = []
  53         self.__body = []
  54         self.__docs = []
  55
  56         assert prefix.endswith('_')
  57         assert not signal_marshal_prefix.endswith('_')
  58
  59         # The main_prefix, sub_prefix thing is to get:
  60         # FOO_ -> (FOO_, _)
  61         # FOO_SVC_ -> (FOO_, _SVC_)
  62         # but
  63         # FOO_BAR/ -> (FOO_BAR_, _)
  64         # FOO_BAR/SVC_ -> (FOO_BAR_, _SVC_)
  65
  66         if '/' in prefix:
  67             main_prefix, sub_prefix = prefix.upper().split('/', 1)
  68             prefix = prefix.replace('/', '_')
  69         else:
  70             main_prefix, sub_prefix = prefix.upper().split('_', 1)
  71
  72         self.MAIN_PREFIX_ = main_prefix + '_'
  73         self._SUB_PREFIX_ = '_' + sub_prefix
  74
  75         self.Prefix_ = prefix
  76         self.Prefix = prefix.replace('_', '')
  77         self.prefix_ = prefix.lower()
  78         self.PREFIX_ = prefix.upper()
  79
  80         self.basename = basename
  81         self.signal_marshal_prefix = signal_marshal_prefix
  82         self.headers = headers
  83         self.end_headers = end_headers
  84         self.not_implemented_func = not_implemented_func
  85         self.allow_havoc = allow_havoc
  86
  87     def h(self, s):
  88         self.__header.append(s)
  89
  90     def b(self, s):
  91         self.__body.append(s)
  92
  93     def d(self, s):
  94         self.__docs.append(s)
  95
  96     def do_node(self, node):
  97         node_name = node.getAttribute('name').replace('/', '')
  98         node_name_mixed = self.node_name_mixed = node_name.replace('_', '')
  99         node_name_lc = self.node_name_lc = node_name.lower()
 100         node_name_uc = self.node_name_uc = node_name.upper()
 101
 102         interfaces = node.getElementsByTagName('interface')
 103         assert len(interfaces) == 1, interfaces
 104         interface = interfaces[0]
 105         self.iface_name = interface.getAttribute('name')
 106
 107         tmp = interface.getAttribute('tp:implement-service')
 108         if tmp == "no":
 109             return
 110
 111         tmp = interface.getAttribute('tp:causes-havoc')
 112         if tmp and not self.allow_havoc:
 113             raise AssertionError('%s is %s' % (self.iface_name, tmp))
 114
 115         iface_emits_changed = get_emits_changed(interface)
 116
 117         self.b('static const DBusGObjectInfo _%s%s_object_info;'
 118                % (self.prefix_, node_name_lc))
 119         self.b('')
 120
 121         methods = interface.getElementsByTagName('method')
 122         signals = interface.getElementsByTagName('signal')
 123         properties = interface.getElementsByTagName('property')
 124         # Don't put properties in dbus-glib glue
 125         glue_properties = []
 126
 127         self.b('struct _%s%sClass {' % (self.Prefix, node_name_mixed))
 128         self.b('    GTypeInterface parent_class;')
 129         for method in methods:
 130             self.b('    %s %s;' % self.get_method_impl_names(method))
 131         self.b('};')
 132         self.b('')
 133
 134         if signals:
 135             self.b('enum {')
 136             for signal in signals:
 137                 self.b('    %s,' % self.get_signal_const_entry(signal))
 138             self.b('    N_%s_SIGNALS' % node_name_uc)
 139             self.b('};')
 140             self.b('static guint %s_signals[N_%s_SIGNALS] = {0};'
 141                    % (node_name_lc, node_name_uc))
 142             self.b('')
 143
 144         self.b('static void %s%s_base_init (gpointer klass);'
 145                % (self.prefix_, node_name_lc))
 146         self.b('')
 147
 148         self.b('GType')
 149         self.b('%s%s_get_type (void)'
 150                % (self.prefix_, node_name_lc))
 151         self.b('{')
 152         self.b('  static GType type = 0;')
 153         self.b('')
 154         self.b('  if (G_UNLIKELY (type == 0))')
 155         self.b('    {')
 156         self.b('      static const GTypeInfo info = {')
 157         self.b('        sizeof (%s%sClass),' % (self.Prefix, node_name_mixed))
 158         self.b('        %s%s_base_init, /* base_init */'
 159                % (self.prefix_, node_name_lc))
 160         self.b('        NULL, /* base_finalize */')
 161         self.b('        NULL, /* class_init */')
 162         self.b('        NULL, /* class_finalize */')
 163         self.b('        NULL, /* class_data */')
 164         self.b('        0,')
 165         self.b('        0, /* n_preallocs */')
 166         self.b('        NULL /* instance_init */')
 167         self.b('      };')
 168         self.b('')
 169         self.b('      type = g_type_register_static (G_TYPE_INTERFACE,')
 170         self.b('          "%s%s", &info, 0);' % (self.Prefix, node_name_mixed))
 171         self.b('    }')
 172         self.b('')
 173         self.b('  return type;')
 174         self.b('}')
 175         self.b('')
 176
 177         self.d('/**')
 178         self.d(' * %s%s:' % (self.Prefix, node_name_mixed))
 179         self.d(' *')
 180         self.d(' * Dummy typedef representing any implementation of this '
 181                'interface.')
 182         self.d(' */')
 183
 184         self.h('typedef struct _%s%s %s%s;'
 185                % (self.Prefix, node_name_mixed, self.Prefix, node_name_mixed))
 186         self.h('')
 187
 188         self.d('/**')
 189         self.d(' * %s%sClass:' % (self.Prefix, node_name_mixed))
 190         self.d(' *')
 191         self.d(' * The class of %s%s.' % (self.Prefix, node_name_mixed))
 192
 193         if methods:
 194             self.d(' *')
 195             self.d(' * In a full implementation of this interface (i.e. all')
 196             self.d(' * methods implemented), the interface initialization')
 197             self.d(' * function used in G_IMPLEMENT_INTERFACE() would')
 198             self.d(' * typically look like this:')
 199             self.d(' *')
 200             self.d(' * <programlisting>')
 201             self.d(' * static void')
 202             self.d(' * implement_%s (gpointer klass,' % self.node_name_lc)
 203             self.d(' *     gpointer unused G_GNUC_UNUSED)')
 204             self.d(' * {')
 205             self.d(' * #define IMPLEMENT(x) %s%s_implement_&num;&num;x (\\'
 206                    % (self.prefix_, self.node_name_lc))
 207             self.d(' *   klass, my_object_&num;&num;x)')
 208
 209             for method in methods:
 210                 class_member_name = method.getAttribute('tp:name-for-bindings')
 211                 class_member_name = class_member_name.lower()
 212                 self.d(' *   IMPLEMENT (%s);' % class_member_name)
 213
 214             self.d(' * #undef IMPLEMENT')
 215             self.d(' * }')
 216             self.d(' * </programlisting>')
 217         else:
 218             self.d(' * This interface has no D-Bus methods, so an')
 219             self.d(' * implementation can typically pass %NULL to')
 220             self.d(' * G_IMPLEMENT_INTERFACE() as the interface')
 221             self.d(' * initialization function.')
 222
 223         self.d(' */')
 224         self.d('')
 225
 226         self.h('typedef struct _%s%sClass %s%sClass;'
 227                % (self.Prefix, node_name_mixed, self.Prefix, node_name_mixed))
 228         self.h('')
 229         self.h('GType %s%s_get_type (void);'
 230                % (self.prefix_, node_name_lc))
 231
 232         gtype = self.current_gtype = \
 233                 self.MAIN_PREFIX_ + 'TYPE' + self._SUB_PREFIX_ + node_name_uc
 234         classname = self.Prefix + node_name_mixed
 235
 236         self.h('#define %s \\\n  (%s%s_get_type ())'
 237                % (gtype, self.prefix_, node_name_lc))
 238         self.h('#define %s%s(obj) \\\n'
 239                '  (G_TYPE_CHECK_INSTANCE_CAST((obj), %s, %s))'
 240                % (self.PREFIX_, node_name_uc, gtype, classname))
 241         self.h('#define %sIS%s%s(obj) \\\n'
 242                '  (G_TYPE_CHECK_INSTANCE_TYPE((obj), %s))'
 243                % (self.MAIN_PREFIX_, self._SUB_PREFIX_, node_name_uc, gtype))
 244         self.h('#define %s%s_GET_CLASS(obj) \\\n'
 245                '  (G_TYPE_INSTANCE_GET_INTERFACE((obj), %s, %sClass))'
 246                % (self.PREFIX_, node_name_uc, gtype, classname))
 247         self.h('')
 248         self.h('')
 249
 250         base_init_code = []
 251
 252         for method in methods:
 253             self.do_method(method)
 254
 255         for signal in signals:
 256             base_init_code.extend(self.do_signal(signal))
 257
 258         self.b('static inline void')
 259         self.b('%s%s_base_init_once (gpointer klass G_GNUC_UNUSED)'
 260                % (self.prefix_, node_name_lc))
 261         self.b('{')
 262
 263         if properties:
 264             self.b('  static TpDBusPropertiesMixinPropInfo properties[%d] = {'
 265                    % (len(properties) + 1))
 266
 267             for m in properties:
 268                 access = m.getAttribute('access')
 269                 assert access in ('read', 'write', 'readwrite')
 270
 271                 if access == 'read':
 272                     flags = 'TP_DBUS_PROPERTIES_MIXIN_FLAG_READ'
 273                 elif access == 'write':
 274                     flags = 'TP_DBUS_PROPERTIES_MIXIN_FLAG_WRITE'
 275                 else:
 276                     flags = ('TP_DBUS_PROPERTIES_MIXIN_FLAG_READ | '
 277                              'TP_DBUS_PROPERTIES_MIXIN_FLAG_WRITE')
 278
 279                 prop_emits_changed = get_emits_changed(m)
 280
 281                 if prop_emits_changed is None:
 282                     prop_emits_changed = iface_emits_changed
 283
 284                 if prop_emits_changed == 'true':
 285                     flags += ' | TP_DBUS_PROPERTIES_MIXIN_FLAG_EMITS_CHANGED'
 286                 elif prop_emits_changed == 'invalidates':
 287                     flags += ' | TP_DBUS_PROPERTIES_MIXIN_FLAG_EMITS_INVALIDATED'
 288
 289                 self.b('      { 0, %s, "%s", 0, NULL, NULL }, /* %s */'
 290                        % (flags, m.getAttribute('type'), m.getAttribute('name')))
 291
 292             self.b('      { 0, 0, NULL, 0, NULL, NULL }')
 293             self.b('  };')
 294             self.b('  static TpDBusPropertiesMixinIfaceInfo interface =')
 295             self.b('      { 0, properties, NULL, NULL };')
 296             self.b('')
 297
 298
 299         self.b('  dbus_g_object_type_install_info (%s%s_get_type (),'
 300                % (self.prefix_, node_name_lc))
 301         self.b('      &_%s%s_object_info);'
 302                % (self.prefix_, node_name_lc))
 303         self.b('')
 304
 305         if properties:
 306             self.b('  interface.dbus_interface = g_quark_from_static_string '
 307                    '("%s");' % self.iface_name)
 308
 309             for i, m in enumerate(properties):
 310                 self.b('  properties[%d].name = g_quark_from_static_string ("%s");'
 311                        % (i, m.getAttribute('name')))
 312                 self.b('  properties[%d].type = %s;'
 313                            % (i, type_to_gtype(m.getAttribute('type'))[1]))
 314
 315             self.b('  tp_svc_interface_set_dbus_properties_info (%s, &interface);'
 316                    % self.current_gtype)
 317
 318             self.b('')
 319
 320         for s in base_init_code:
 321             self.b(s)
 322         self.b('}')
 323
 324         self.b('static void')
 325         self.b('%s%s_base_init (gpointer klass)'
 326                % (self.prefix_, node_name_lc))
 327         self.b('{')
 328         self.b('  static gboolean initialized = FALSE;')
 329         self.b('')
 330         self.b('  if (!initialized)')
 331         self.b('    {')
 332         self.b('      initialized = TRUE;')
 333         self.b('      %s%s_base_init_once (klass);'
 334                % (self.prefix_, node_name_lc))
 335         self.b('    }')
 336         # insert anything we need to do per implementation here
 337         self.b('}')
 338
 339         self.h('')
 340
 341         self.b('static const DBusGMethodInfo _%s%s_methods[] = {'
 342                % (self.prefix_, node_name_lc))
 343
 344         method_blob, offsets = self.get_method_glue(methods)
 345
 346         for method, offset in zip(methods, offsets):
 347             self.do_method_glue(method, offset)
 348
 349         if len(methods) == 0:
 350             # empty arrays are a gcc extension, so put in a dummy member
 351             self.b("  { NULL, NULL, 0 }")
 352
 353         self.b('};')
 354         self.b('')
 355
 356         self.b('static const DBusGObjectInfo _%s%s_object_info = {'
 357                % (self.prefix_, node_name_lc))
 358         self.b('  0,')  # version
 359         self.b('  _%s%s_methods,' % (self.prefix_, node_name_lc))
 360         self.b('  %d,' % len(methods))
 361         self.b('"' + method_blob.replace('\0', '\\0') + '",')
 362         self.b('"' + self.get_signal_glue(signals).replace('\0', '\\0') + '",')
 363         self.b('"' +
 364                self.get_property_glue(glue_properties).replace('\0', '\\0') +
 365                '",')
 366         self.b('};')
 367         self.b('')
 368
 369         self.node_name_mixed = None
 370         self.node_name_lc = None
 371         self.node_name_uc = None
 372
 373     def get_method_glue(self, methods):
 374         info = []
 375         offsets = []
 376
 377         for method in methods:
 378             offsets.append(len(''.join(info)))
 379
 380             info.append(self.iface_name + '\0')
 381             info.append(method.getAttribute('name') + '\0')
 382
 383             info.append('A\0')    # async
 384
 385             counter = 0
 386             for arg in method.getElementsByTagName('arg'):
 387                 out = arg.getAttribute('direction') == 'out'
 388
 389                 name = arg.getAttribute('name')
 390                 if not name:
 391                     assert out
 392                     name = 'arg%u' % counter
 393                 counter += 1
 394
 395                 info.append(name + '\0')
 396
 397                 if out:
 398                     info.append('O\0')
 399                 else:
 400                     info.append('I\0')
 401
 402                 if out:
 403                     info.append('F\0')    # not const
 404                     info.append('N\0')    # not error or return
 405                 info.append(arg.getAttribute('type') + '\0')
 406
 407             info.append('\0')
 408
 409         return ''.join(info) + '\0', offsets
 410
 411     def do_method_glue(self, method, offset):
 412         lc_name = method.getAttribute('tp:name-for-bindings')
 413         if method.getAttribute('name') != lc_name.replace('_', ''):
 414             raise AssertionError('Method %s tp:name-for-bindings (%s) does '
 415                     'not match' % (method.getAttribute('name'), lc_name))
 416         lc_name = lc_name.lower()
 417
 418         marshaller = 'g_cclosure_marshal_generic'
 419         wrapper = self.prefix_ + self.node_name_lc + '_' + lc_name
 420
 421         self.b("  { (GCallback) %s, %s, %d }," % (wrapper, marshaller, offset))
 422
 423     def get_signal_glue(self, signals):
 424         info = []
 425
 426         for signal in signals:
 427             info.append(self.iface_name)
 428             info.append(signal.getAttribute('name'))
 429
 430         return '\0'.join(info) + '\0\0'
 431
 432     # the implementation can be the same
 433     get_property_glue = get_signal_glue
 434
 435     def get_method_impl_names(self, method):
 436         dbus_method_name = method.getAttribute('name')
 437
 438         class_member_name = method.getAttribute('tp:name-for-bindings')
 439         if dbus_method_name != class_member_name.replace('_', ''):
 440             raise AssertionError('Method %s tp:name-for-bindings (%s) does '
 441                     'not match' % (dbus_method_name, class_member_name))
 442         class_member_name = class_member_name.lower()
 443
 444         stub_name = (self.prefix_ + self.node_name_lc + '_' +
 445                      class_member_name)
 446         return (stub_name + '_impl', class_member_name + '_cb')
 447
 448     def do_method(self, method):
 449         assert self.node_name_mixed is not None
 450
 451         in_class = []
 452
 453         # Examples refer to Thing.DoStuff (su) -> ii
 454
 455         # DoStuff
 456         dbus_method_name = method.getAttribute('name')
 457         # do_stuff
 458         class_member_name = method.getAttribute('tp:name-for-bindings')
 459         if dbus_method_name != class_member_name.replace('_', ''):
 460             raise AssertionError('Method %s tp:name-for-bindings (%s) does '
 461                     'not match' % (dbus_method_name, class_member_name))
 462         class_member_name = class_member_name.lower()
 463
 464         # void tp_svc_thing_do_stuff (TpSvcThing *, const char *, guint,
 465         #   DBusGMethodInvocation *);
 466         stub_name = (self.prefix_ + self.node_name_lc + '_' +
 467                      class_member_name)
 468         # typedef void (*tp_svc_thing_do_stuff_impl) (TpSvcThing *,
 469         #   const char *, guint, DBusGMethodInvocation);
 470         impl_name = stub_name + '_impl'
 471         # void tp_svc_thing_return_from_do_stuff (DBusGMethodInvocation *,
 472         #   gint, gint);
 473         ret_name = (self.prefix_ + self.node_name_lc + '_return_from_' +
 474                     class_member_name)
 475
 476         # Gather arguments
 477         in_args = []
 478         out_args = []
 479         for i in method.getElementsByTagName('arg'):
 480             name = i.getAttribute('name')
 481             direction = i.getAttribute('direction') or 'in'
 482             dtype = i.getAttribute('type')
 483
 484             assert direction in ('in', 'out')
 485
 486             if name:
 487                 name = direction + '_' + name
 488             elif direction == 'in':
 489                 name = direction + str(len(in_args))
 490             else:
 491                 name = direction + str(len(out_args))
 492
 493             ctype, gtype, marshaller, pointer = type_to_gtype(dtype)
 494
 495             if pointer:
 496                 ctype = 'const ' + ctype
 497
 498             struct = (ctype, name)
 499
 500             if direction == 'in':
 501                 in_args.append(struct)
 502             else:
 503                 out_args.append(struct)
 504
 505         # Implementation type declaration (in header, docs separated)
 506         self.d('/**')
 507         self.d(' * %s:' % impl_name)
 508         self.d(' * @self: The object implementing this interface')
 509         for (ctype, name) in in_args:
 510             self.d(' * @%s: %s (FIXME, generate documentation)'
 511                    % (name, ctype))
 512         self.d(' * @context: Used to return values or throw an error')
 513         self.d(' *')
 514         self.d(' * The signature of an implementation of the D-Bus method')
 515         self.d(' * %s on interface %s.' % (dbus_method_name, self.iface_name))
 516         self.d(' */')
 517
 518         self.h('typedef void (*%s) (%s%s *self,'
 519           % (impl_name, self.Prefix, self.node_name_mixed))
 520         for (ctype, name) in in_args:
 521             self.h('    %s%s,' % (ctype, name))
 522         self.h('    DBusGMethodInvocation *context);')
 523
 524         # Class member (in class definition)
 525         in_class.append('    %s %s;' % (impl_name, class_member_name))
 526
 527         # Stub definition (in body only - it's static)
 528         self.b('static void')
 529         self.b('%s (%s%s *self,'
 530            % (stub_name, self.Prefix, self.node_name_mixed))
 531         for (ctype, name) in in_args:
 532             self.b('    %s%s,' % (ctype, name))
 533         self.b('    DBusGMethodInvocation *context)')
 534         self.b('{')
 535         self.b('  %s impl = (%s%s_GET_CLASS (self)->%s_cb);'
 536           % (impl_name, self.PREFIX_, self.node_name_uc, class_member_name))
 537         self.b('')
 538         self.b('  if (impl != NULL)')
 539         tmp = ['self'] + [name for (ctype, name) in in_args] + ['context']
 540         self.b('    {')
 541         self.b('      (impl) (%s);' % ',\n        '.join(tmp))
 542         self.b('    }')
 543         self.b('  else')
 544         self.b('    {')
 545         if self.not_implemented_func:
 546             self.b('      %s (context);' % self.not_implemented_func)
 547         else:
 548             self.b('      GError e = { DBUS_GERROR, ')
 549             self.b('           DBUS_GERROR_UNKNOWN_METHOD,')
 550             self.b('           "Method not implemented" };')
 551             self.b('')
 552             self.b('      dbus_g_method_return_error (context, &e);')
 553         self.b('    }')
 554         self.b('}')
 555         self.b('')
 556
 557         # Implementation registration (in both header and body)
 558         self.h('void %s%s_implement_%s (%s%sClass *klass, %s impl);'
 559                % (self.prefix_, self.node_name_lc, class_member_name,
 560                   self.Prefix, self.node_name_mixed, impl_name))
 561
 562         self.d('/**')
 563         self.d(' * %s%s_implement_%s:'
 564                % (self.prefix_, self.node_name_lc, class_member_name))
 565         self.d(' * @klass: A class whose instances implement this interface')
 566         self.d(' * @impl: A callback used to implement the %s D-Bus method'
 567                % dbus_method_name)
 568         self.d(' *')
 569         self.d(' * Register an implementation for the %s method in the vtable'
 570                % dbus_method_name)
 571         self.d(' * of an implementation of this interface. To be called from')
 572         self.d(' * the interface init function.')
 573         self.d(' */')
 574
 575         self.b('void')
 576         self.b('%s%s_implement_%s (%s%sClass *klass, %s impl)'
 577                % (self.prefix_, self.node_name_lc, class_member_name,
 578                   self.Prefix, self.node_name_mixed, impl_name))
 579         self.b('{')
 580         self.b('  klass->%s_cb = impl;' % class_member_name)
 581         self.b('}')
 582         self.b('')
 583
 584         # Return convenience function (static inline, in header)
 585         self.d('/**')
 586         self.d(' * %s:' % ret_name)
 587         self.d(' * @context: The D-Bus method invocation context')
 588         for (ctype, name) in out_args:
 589             self.d(' * @%s: %s (FIXME, generate documentation)'
 590                    % (name, ctype))
 591         self.d(' *')
 592         self.d(' * Return successfully by calling dbus_g_method_return().')
 593         self.d(' * This inline function exists only to provide type-safety.')
 594         self.d(' */')
 595         self.d('')
 596
 597         tmp = (['DBusGMethodInvocation *context'] +
 598                [ctype + name for (ctype, name) in out_args])
 599         self.h('static inline')
 600         self.h('/* this comment is to stop gtkdoc realising this is static */')
 601         self.h(('void %s (' % ret_name) + (',\n    '.join(tmp)) + ');')
 602         self.h('static inline void')
 603         self.h(('%s (' % ret_name) + (',\n    '.join(tmp)) + ')')
 604         self.h('{')
 605         tmp = ['context'] + [name for (ctype, name) in out_args]
 606         self.h('  dbus_g_method_return (' + ',\n      '.join(tmp) + ');')
 607         self.h('}')
 608         self.h('')
 609
 610         return in_class
 611
 612     def get_signal_const_entry(self, signal):
 613         assert self.node_name_uc is not None
 614         return ('SIGNAL_%s_%s'
 615                 % (self.node_name_uc, signal.getAttribute('name')))
 616
 617     def do_signal(self, signal):
 618         assert self.node_name_mixed is not None
 619
 620         in_base_init = []
 621
 622         # for signal: Thing::StuffHappened (s, u)
 623         # we want to emit:
 624         # void tp_svc_thing_emit_stuff_happened (gpointer instance,
 625         #    const char *arg0, guint arg1);
 626
 627         dbus_name = signal.getAttribute('name')
 628
 629         ugly_name = signal.getAttribute('tp:name-for-bindings')
 630         if dbus_name != ugly_name.replace('_', ''):
 631             raise AssertionError('Signal %s tp:name-for-bindings (%s) does '
 632                     'not match' % (dbus_name, ugly_name))
 633
 634         stub_name = (self.prefix_ + self.node_name_lc + '_emit_' +
 635                      ugly_name.lower())
 636
 637         const_name = self.get_signal_const_entry(signal)
 638
 639         # Gather arguments
 640         args = []
 641         for i in signal.getElementsByTagName('arg'):
 642             name = i.getAttribute('name')
 643             dtype = i.getAttribute('type')
 644             tp_type = i.getAttribute('tp:type')
 645
 646             if name:
 647                 name = 'arg_' + name
 648             else:
 649                 name = 'arg' + str(len(args))
 650
 651             ctype, gtype, marshaller, pointer = type_to_gtype(dtype)
 652
 653             if pointer:
 654                 ctype = 'const ' + ctype
 655
 656             struct = (ctype, name, gtype)
 657             args.append(struct)
 658
 659         tmp = (['gpointer instance'] +
 660                [ctype + name for (ctype, name, gtype) in args])
 661
 662         self.h(('void %s (' % stub_name) + (',\n    '.join(tmp)) + ');')
 663
 664         # FIXME: emit docs
 665
 666         self.d('/**')
 667         self.d(' * %s:' % stub_name)
 668         self.d(' * @instance: The object implementing this interface')
 669         for (ctype, name, gtype) in args:
 670             self.d(' * @%s: %s (FIXME, generate documentation)'
 671                    % (name, ctype))
 672         self.d(' *')
 673         self.d(' * Type-safe wrapper around g_signal_emit to emit the')
 674         self.d(' * %s signal on interface %s.'
 675                % (dbus_name, self.iface_name))
 676         self.d(' */')
 677
 678         self.b('void')
 679         self.b(('%s (' % stub_name) + (',\n    '.join(tmp)) + ')')
 680         self.b('{')
 681         self.b('  g_assert (instance != NULL);')
 682         self.b('  g_assert (G_TYPE_CHECK_INSTANCE_TYPE (instance, %s));'
 683                % (self.current_gtype))
 684         tmp = (['instance', '%s_signals[%s]' % (self.node_name_lc, const_name),
 685                 '0'] + [name for (ctype, name, gtype) in args])
 686         self.b('  g_signal_emit (' + ',\n      '.join(tmp) + ');')
 687         self.b('}')
 688         self.b('')
 689
 690         signal_name = dbus_gutils_wincaps_to_uscore(dbus_name).replace('_',
 691                 '-')
 692
 693         self.d('/**')
 694         self.d(' * %s%s::%s:'
 695                 % (self.Prefix, self.node_name_mixed, signal_name))
 696         self.d(' * @self: an object')
 697         for (ctype, name, gtype) in args:
 698             self.d(' * @%s: %s (FIXME, generate documentation)'
 699                    % (name, ctype))
 700         self.d(' *')
 701         self.d(' * The %s D-Bus signal is emitted whenever '
 702                 'this GObject signal is.' % dbus_name)
 703         self.d(' */')
 704         self.d('')
 705
 706         in_base_init.append('  %s_signals[%s] ='
 707                             % (self.node_name_lc, const_name))
 708         in_base_init.append('  g_signal_new ("%s",' % signal_name)
 709         in_base_init.append('      G_OBJECT_CLASS_TYPE (klass),')
 710         in_base_init.append('      G_SIGNAL_RUN_LAST|G_SIGNAL_DETAILED,')
 711         in_base_init.append('      0,')
 712         in_base_init.append('      NULL, NULL,')
 713         in_base_init.append('      g_cclosure_marshal_generic,')
 714         in_base_init.append('      G_TYPE_NONE,')
 715         tmp = ['%d' % len(args)] + [gtype for (ctype, name, gtype) in args]
 716         in_base_init.append('      %s);' % ',\n      '.join(tmp))
 717         in_base_init.append('')
 718
 719         return in_base_init
 720
 721     def have_properties(self, nodes):
 722         for node in nodes:
 723             interface =  node.getElementsByTagName('interface')[0]
 724             if interface.getElementsByTagName('property'):
 725                 return True
 726         return False
 727
 728     def __call__(self):
 729         nodes = self.dom.getElementsByTagName('node')
 730         nodes.sort(key=key_by_name)
 731
 732         self.h('#include <glib-object.h>')
 733         self.h('#include <dbus/dbus-glib.h>')
 734
 735         for header in self.headers:
 736             self.h('#include %s' % header)
 737         self.h('')
 738
 739         self.h('')
 740         self.h('G_BEGIN_DECLS')
 741         self.h('')
 742
 743         self.b('#include "%s.h"' % self.basename)
 744         self.b('')
 745
 746         for node in nodes:
 747             self.do_node(node)
 748
 749         self.h('')
 750         self.h('G_END_DECLS')
 751
 752         self.b('')
 753         for header in self.end_headers:
 754             self.b('#include %s' % header)
 755
 756         self.h('')
 757         self.b('')
 758         file_set_contents(self.basename + '.h', u('\n').join(self.__header).encode('utf-8'))
 759         file_set_contents(self.basename + '.c', u('\n').join(self.__body).encode('utf-8'))
 760         file_set_contents(self.basename + '-gtk-doc.h', u('\n').join(self.__docs).encode('utf-8'))
 761
 762 def cmdline_error():
 763     print("""\
 764 usage:
 765     gen-ginterface [OPTIONS] xmlfile Prefix_
 766 options:
 767     --include='<header.h>' (may be repeated)
 768     --include='"header.h"' (ditto)
 769     --include-end='"header.h"' (ditto)
 770         Include extra headers in the generated .c file
 771     --signal-marshal-prefix='prefix'
 772         Use the given prefix on generated signal marshallers (default is
 773         prefix.lower()).
 774     --filename='BASENAME'
 775         Set the basename for the output files (default is prefix.lower()
 776         + 'ginterfaces')
 777     --not-implemented-func='symbol'
 778         Set action when methods not implemented in the interface vtable are
 779         called. symbol must have signature
 780             void symbol (DBusGMethodInvocation *context)
 781         and return some sort of "not implemented" error via
 782             dbus_g_method_return_error (context, ...)
 783 """)
 784     sys.exit(1)
 785
 786
 787 if __name__ == '__main__':
 788     from getopt import gnu_getopt
 789
 790     options, argv = gnu_getopt(sys.argv[1:], '',
 791                                ['filename=', 'signal-marshal-prefix=',
 792                                 'include=', 'include-end=',
 793                                 'allow-unstable',
 794                                 'not-implemented-func='])
 795
 796     try:
 797         prefix = argv[1]
 798     except IndexError:
 799         cmdline_error()
 800
 801     basename = prefix.lower() + 'ginterfaces'
 802     signal_marshal_prefix = prefix.lower().rstrip('_')
 803     headers = []
 804     end_headers = []
 805     not_implemented_func = ''
 806     allow_havoc = False
 807
 808     for option, value in options:
 809         if option == '--filename':
 810             basename = value
 811         elif option == '--signal-marshal-prefix':
 812             signal_marshal_prefix = value
 813         elif option == '--include':
 814             if value[0] not in '<"':
 815                 value = '"%s"' % value
 816             headers.append(value)
 817         elif option == '--include-end':
 818             if value[0] not in '<"':
 819                 value = '"%s"' % value
 820             end_headers.append(value)
 821         elif option == '--not-implemented-func':
 822             not_implemented_func = value
 823         elif option == '--allow-unstable':
 824             allow_havoc = True
 825
 826     try:
 827         dom = xml.dom.minidom.parse(argv[0])
 828     except IndexError:
 829         cmdline_error()
 830
 831     Generator(dom, prefix, basename, signal_marshal_prefix, headers,
 832               end_headers, not_implemented_func, allow_havoc)()