gio/gdbus-2.0/codegen/parser.py

   1 # -*- Mode: Python -*-
   2
   3 # GDBus - GLib D-Bus Library
   4 #
   5 # Copyright (C) 2008-2011 Red Hat, Inc.
   6 #
   7 # This library is free software; you can redistribute it and/or
   8 # modify it under the terms of the GNU Lesser General Public
   9 # License as published by the Free Software Foundation; either
  10 # version 2 of the License, or (at your option) any later version.
  11 #
  12 # This library is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15 # Lesser General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU Lesser General
  18 # Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
  19 #
  20 # Author: David Zeuthen <davidz@redhat.com>
  21
  22 import sys
  23 import xml.parsers.expat
  24
  25 from . import dbustypes
  26
  27 class DBusXMLParser:
  28     STATE_TOP = 'top'
  29     STATE_NODE = 'node'
  30     STATE_INTERFACE = 'interface'
  31     STATE_METHOD = 'method'
  32     STATE_SIGNAL = 'signal'
  33     STATE_PROPERTY = 'property'
  34     STATE_ARG = 'arg'
  35     STATE_ANNOTATION = 'annotation'
  36     STATE_IGNORED = 'ignored'
  37
  38     def __init__(self, xml_data):
  39         self._parser = xml.parsers.expat.ParserCreate()
  40         self._parser.CommentHandler = self.handle_comment
  41         self._parser.CharacterDataHandler = self.handle_char_data
  42         self._parser.StartElementHandler = self.handle_start_element
  43         self._parser.EndElementHandler = self.handle_end_element
  44
  45         self.parsed_interfaces = []
  46         self._cur_object = None
  47
  48         self.state = DBusXMLParser.STATE_TOP
  49         self.state_stack = []
  50         self._cur_object = None
  51         self._cur_object_stack = []
  52
  53         self.doc_comment_last_symbol = ''
  54
  55         self._parser.Parse(xml_data)
  56
  57     COMMENT_STATE_BEGIN = 'begin'
  58     COMMENT_STATE_PARAMS = 'params'
  59     COMMENT_STATE_BODY = 'body'
  60     COMMENT_STATE_SKIP = 'skip'
  61     def handle_comment(self, data):
  62         comment_state = DBusXMLParser.COMMENT_STATE_BEGIN;
  63         lines = data.split('\n')
  64         symbol = ''
  65         body = ''
  66         in_para = False
  67         params = {}
  68         for line in lines:
  69             orig_line = line
  70             line = line.lstrip()
  71             if comment_state == DBusXMLParser.COMMENT_STATE_BEGIN:
  72                 if len(line) > 0:
  73                     colon_index = line.find(': ')
  74                     if colon_index == -1:
  75                         if line.endswith(':'):
  76                             symbol = line[0:len(line)-1]
  77                             comment_state = DBusXMLParser.COMMENT_STATE_PARAMS
  78                         else:
  79                             comment_state = DBusXMLParser.COMMENT_STATE_SKIP
  80                     else:
  81                         symbol = line[0:colon_index]
  82                         rest_of_line = line[colon_index+2:].strip()
  83                         if len(rest_of_line) > 0:
  84                             body += '<para>' + rest_of_line + '</para>'
  85                         comment_state = DBusXMLParser.COMMENT_STATE_PARAMS
  86             elif comment_state == DBusXMLParser.COMMENT_STATE_PARAMS:
  87                 if line.startswith('@'):
  88                     colon_index = line.find(': ')
  89                     if colon_index == -1:
  90                         comment_state = DBusXMLParser.COMMENT_STATE_BODY
  91                         if not in_para:
  92                             body += '<para>'
  93                             in_para = True
  94                         body += orig_line + '\n'
  95                     else:
  96                         param = line[1:colon_index]
  97                         docs = line[colon_index + 2:]
  98                         params[param] = docs
  99                 else:
 100                     comment_state = DBusXMLParser.COMMENT_STATE_BODY
 101                     if len(line) > 0:
 102                         if not in_para:
 103                             body += '<para>'
 104                             in_para = True
 105                         body += orig_line + '\n'
 106             elif comment_state == DBusXMLParser.COMMENT_STATE_BODY:
 107                 if len(line) > 0:
 108                     if not in_para:
 109                         body += '<para>'
 110                         in_para = True
 111                     body += orig_line + '\n'
 112                 else:
 113                     if in_para:
 114                         body += '</para>'
 115                         in_para = False
 116         if in_para:
 117             body += '</para>'
 118
 119         if symbol != '':
 120             self.doc_comment_last_symbol = symbol
 121             self.doc_comment_params = params
 122             self.doc_comment_body = body
 123
 124     def handle_char_data(self, data):
 125         #print 'char_data=%s'%data
 126         pass
 127
 128     def handle_start_element(self, name, attrs):
 129         old_state = self.state
 130         old_cur_object = self._cur_object
 131         if self.state == DBusXMLParser.STATE_IGNORED:
 132             self.state = DBusXMLParser.STATE_IGNORED
 133         elif self.state == DBusXMLParser.STATE_TOP:
 134             if name == DBusXMLParser.STATE_NODE:
 135                 self.state = DBusXMLParser.STATE_NODE
 136             else:
 137                 self.state = DBusXMLParser.STATE_IGNORED
 138         elif self.state == DBusXMLParser.STATE_NODE:
 139             if name == DBusXMLParser.STATE_INTERFACE:
 140                 self.state = DBusXMLParser.STATE_INTERFACE
 141                 iface = dbustypes.Interface(attrs['name'])
 142                 self._cur_object = iface
 143                 self.parsed_interfaces.append(iface)
 144             elif name == DBusXMLParser.STATE_ANNOTATION:
 145                 self.state = DBusXMLParser.STATE_ANNOTATION
 146                 anno = dbustypes.Annotation(attrs['name'], attrs['value'])
 147                 self._cur_object.annotations.append(anno)
 148                 self._cur_object = anno
 149             else:
 150                 self.state = DBusXMLParser.STATE_IGNORED
 151
 152             # assign docs, if any
 153             if 'name' in attrs and self.doc_comment_last_symbol == attrs['name']:
 154                 self._cur_object.doc_string = self.doc_comment_body
 155                 if 'short_description' in self.doc_comment_params:
 156                     short_description = self.doc_comment_params['short_description']
 157                     self._cur_object.doc_string_brief = short_description
 158                 if 'since' in self.doc_comment_params:
 159                     self._cur_object.since = \
 160                         self.doc_comment_params['since'].strip()
 161
 162         elif self.state == DBusXMLParser.STATE_INTERFACE:
 163             if name == DBusXMLParser.STATE_METHOD:
 164                 self.state = DBusXMLParser.STATE_METHOD
 165                 method = dbustypes.Method(attrs['name'])
 166                 self._cur_object.methods.append(method)
 167                 self._cur_object = method
 168             elif name == DBusXMLParser.STATE_SIGNAL:
 169                 self.state = DBusXMLParser.STATE_SIGNAL
 170                 signal = dbustypes.Signal(attrs['name'])
 171                 self._cur_object.signals.append(signal)
 172                 self._cur_object = signal
 173             elif name == DBusXMLParser.STATE_PROPERTY:
 174                 self.state = DBusXMLParser.STATE_PROPERTY
 175                 prop = dbustypes.Property(attrs['name'], attrs['type'], attrs['access'])
 176                 self._cur_object.properties.append(prop)
 177                 self._cur_object = prop
 178             elif name == DBusXMLParser.STATE_ANNOTATION:
 179                 self.state = DBusXMLParser.STATE_ANNOTATION
 180                 anno = dbustypes.Annotation(attrs['name'], attrs['value'])
 181                 self._cur_object.annotations.append(anno)
 182                 self._cur_object = anno
 183             else:
 184                 self.state = DBusXMLParser.STATE_IGNORED
 185
 186             # assign docs, if any
 187             if 'name' in attrs and self.doc_comment_last_symbol == attrs['name']:
 188                 self._cur_object.doc_string = self.doc_comment_body
 189                 if 'since' in self.doc_comment_params:
 190                     self._cur_object.since = \
 191                         self.doc_comment_params['since'].strip()
 192
 193         elif self.state == DBusXMLParser.STATE_METHOD:
 194             if name == DBusXMLParser.STATE_ARG:
 195                 self.state = DBusXMLParser.STATE_ARG
 196                 arg_name = None
 197                 if 'name' in attrs:
 198                     arg_name = attrs['name']
 199                 arg = dbustypes.Arg(arg_name, attrs['type'])
 200                 direction = attrs.get('direction', 'in')
 201                 if direction == 'in':
 202                     self._cur_object.in_args.append(arg)
 203                 elif direction == 'out':
 204                     self._cur_object.out_args.append(arg)
 205                 else:
 206                     raise RuntimeError('Invalid direction "%s"'%(direction))
 207                 self._cur_object = arg
 208             elif name == DBusXMLParser.STATE_ANNOTATION:
 209                 self.state = DBusXMLParser.STATE_ANNOTATION
 210                 anno = dbustypes.Annotation(attrs['name'], attrs['value'])
 211                 self._cur_object.annotations.append(anno)
 212                 self._cur_object = anno
 213             else:
 214                 self.state = DBusXMLParser.STATE_IGNORED
 215
 216             # assign docs, if any
 217             if self.doc_comment_last_symbol == old_cur_object.name:
 218                 if 'name' in attrs and attrs['name'] in self.doc_comment_params:
 219                     doc_string = self.doc_comment_params[attrs['name']]
 220                     if doc_string != None:
 221                         self._cur_object.doc_string = doc_string
 222                     if 'since' in self.doc_comment_params:
 223                         self._cur_object.since = \
 224                             self.doc_comment_params['since'].strip()
 225
 226         elif self.state == DBusXMLParser.STATE_SIGNAL:
 227             if name == DBusXMLParser.STATE_ARG:
 228                 self.state = DBusXMLParser.STATE_ARG
 229                 arg_name = None
 230                 if 'name' in attrs:
 231                     arg_name = attrs['name']
 232                 arg = dbustypes.Arg(arg_name, attrs['type'])
 233                 self._cur_object.args.append(arg)
 234                 self._cur_object = arg
 235             elif name == DBusXMLParser.STATE_ANNOTATION:
 236                 self.state = DBusXMLParser.STATE_ANNOTATION
 237                 anno = dbustypes.Annotation(attrs['name'], attrs['value'])
 238                 self._cur_object.annotations.append(anno)
 239                 self._cur_object = anno
 240             else:
 241                 self.state = DBusXMLParser.STATE_IGNORED
 242
 243             # assign docs, if any
 244             if self.doc_comment_last_symbol == old_cur_object.name:
 245                 if 'name' in attrs and attrs['name'] in self.doc_comment_params:
 246                     doc_string = self.doc_comment_params[attrs['name']]
 247                     if doc_string != None:
 248                         self._cur_object.doc_string = doc_string
 249                     if 'since' in self.doc_comment_params:
 250                         self._cur_object.since = \
 251                             self.doc_comment_params['since'].strip()
 252
 253         elif self.state == DBusXMLParser.STATE_PROPERTY:
 254             if name == DBusXMLParser.STATE_ANNOTATION:
 255                 self.state = DBusXMLParser.STATE_ANNOTATION
 256                 anno = dbustypes.Annotation(attrs['name'], attrs['value'])
 257                 self._cur_object.annotations.append(anno)
 258                 self._cur_object = anno
 259             else:
 260                 self.state = DBusXMLParser.STATE_IGNORED
 261
 262         elif self.state == DBusXMLParser.STATE_ARG:
 263             if name == DBusXMLParser.STATE_ANNOTATION:
 264                 self.state = DBusXMLParser.STATE_ANNOTATION
 265                 anno = dbustypes.Annotation(attrs['name'], attrs['value'])
 266                 self._cur_object.annotations.append(anno)
 267                 self._cur_object = anno
 268             else:
 269                 self.state = DBusXMLParser.STATE_IGNORED
 270
 271         elif self.state == DBusXMLParser.STATE_ANNOTATION:
 272             if name == DBusXMLParser.STATE_ANNOTATION:
 273                 self.state = DBusXMLParser.STATE_ANNOTATION
 274                 anno = dbustypes.Annotation(attrs['name'], attrs['value'])
 275                 self._cur_object.annotations.append(anno)
 276                 self._cur_object = anno
 277             else:
 278                 self.state = DBusXMLParser.STATE_IGNORED
 279
 280         else:
 281             raise RuntimeError('Unhandled state "%s" while entering element with name "%s"'%(self.state, name))
 282
 283         self.state_stack.append(old_state)
 284         self._cur_object_stack.append(old_cur_object)
 285
 286     def handle_end_element(self, name):
 287         self.state = self.state_stack.pop()
 288         self._cur_object = self._cur_object_stack.pop()
 289
 290 def parse_dbus_xml(xml_data):
 291     parser = DBusXMLParser(xml_data)
 292     return parser.parsed_interfaces