vcs.maemo.org Git - hermes/blob - package/src/pygobject.py

   1 from ctypes import *
   2 import sys
   3 import ctypes
   4
   5 import gobject
   6
   7 # -------------------------------------------------------------------------
   8 class _PyGObject_Functions(ctypes.Structure):
   9     """GObject <-> Python mapping from http://faq.pygtk.org/index.py?req=show&file=faq23.041.htp"""
  10     _fields_ = [
  11         ('register_class',
  12          ctypes.PYFUNCTYPE(ctypes.c_void_p, ctypes.c_char_p,
  13                            ctypes.c_int, ctypes.py_object,
  14                            ctypes.py_object)),
  15         ('register_wrapper',
  16          ctypes.PYFUNCTYPE(ctypes.c_void_p, ctypes.py_object)),
  17         ('register_sinkfunc',
  18          ctypes.PYFUNCTYPE(ctypes.py_object, ctypes.c_void_p)),
  19         ('lookupclass',
  20          ctypes.PYFUNCTYPE(ctypes.py_object, ctypes.c_int)),
  21         ('newgobj',
  22          ctypes.PYFUNCTYPE(ctypes.py_object, ctypes.c_void_p)),
  23         ]
  24
  25
  26 # -------------------------------------------------------------------------
  27 class PyGObjectCAPI(object):
  28     """GObject <-> Python mapping from http://faq.pygtk.org/index.py?req=show&file=faq23.041.htp"""
  29
  30     def __init__(self):
  31         addr = ctypes.pythonapi.PyCObject_AsVoidPtr(
  32             ctypes.py_object(gobject._PyGObject_API))
  33         self._api = _PyGObject_Functions.from_address(addr)
  34
  35     def pygobject_new(self, addr):
  36         return self._api.newgobj(addr)
  37
  38
  39 # -------------------------------------------------------------------------
  40 class GList(Structure):
  41   """GList representation and convenience functions, based on Java's Iterable.
  42
  43      Copyright (c) Andrew Flegg <andrew@bleb.org> 2009.
  44      Released under the Artistic Licence."""
  45
  46
  47   # -----------------------------------------------------------------------
  48   @classmethod
  49   def new(clazz, ptr = None):
  50     """Return a reference to an empty, or valid, GList at the
  51        given pointer address."""
  52
  53     if ptr:
  54       return cast(c_void_p(ptr), POINTER(GList)).contents
  55     else:
  56       return GList()
  57
  58
  59   # -----------------------------------------------------------------------
  60   _fields_ = [('_data', c_void_p),
  61               ('_next', c_void_p),
  62               ('_prev', c_void_p)]
  63
  64   _ptr = None # Initialises to before the list for `while(has_next)...'
  65
  66
  67   # -----------------------------------------------------------------------
  68   def reset(self):
  69     """Rewind the iterable to the start of the list."""
  70
  71     self._ptr = None
  72
  73   # -----------------------------------------------------------------------
  74   def has_next(self):
  75     """Return True if the list has an item on which next can be called."""
  76
  77     return (not self._ptr and self._data) or (self._ptr and self._ptr._next)
  78
  79
  80   # -----------------------------------------------------------------------
  81   def next(self, as_a = None):
  82     """Move the pointer on to the next item in the list and return its value, or
  83        raise an exception if already on the last."""
  84
  85     if self._ptr and not self._ptr._next:
  86       raise Exception("IndexOutOfBounds")
  87
  88     self._ptr = self._ptr and cast(self._ptr._next, POINTER(GList)).contents or self
  89     if not self._ptr._data:
  90       return None
  91     elif as_a:
  92       return cast(self._ptr._data, POINTER(as_a)).contents
  93     else:
  94       return self._ptr._data
  95
  96
  97   # -----------------------------------------------------------------------
  98   def set(self, value):
  99     """Set the data in the current position in the list."""
 100
 101     if not self._ptr:
 102       self._ptr = self
 103
 104     self._ptr._data = cast(value, c_void_p);
 105
 106
 107
 108   # -----------------------------------------------------------------------
 109   def add(self):
 110     """Add a new entry on to the end of the list, ready to be "set"."""
 111
 112     self.reset()
 113     while self.has_next():
 114       self.next()
 115
 116     if not self._ptr:
 117       self._ptr = self
 118     else:
 119       new = GList()
 120       new._prev = addressof(self._ptr)
 121       self._ptr._next = addressof(new)
 122       self._ptr = new
 123
 124
 125 # -------------------------------------------------------------------------
 126 class EContactPhoto_inlined(Structure):
 127   _fields_ = [('mime_type', c_char_p),
 128               ('length', c_uint),
 129               ('data', c_void_p)]
 130
 131 class EContactPhoto_data(Union):
 132   _fields_ = [('inlined', EContactPhoto_inlined),
 133               ('uri', c_char_p)]
 134
 135 class EContactPhoto(Structure):
 136   _fields_ = [('type', c_int),
 137               ('data', EContactPhoto_data)]
 138
 139 class EContactDate(Structure):
 140   _fields_ = [('year', c_uint),
 141               ('month', c_uint),
 142               ('day', c_uint)]
 143
 144 # -------------------------------------------------------------------------
 145 class EVCardAttribute(Structure):
 146  _fields_ = [('group', c_char_p),
 147             ('name', c_char_p),
 148             ('params', POINTER(GList)),
 149             ('values', POINTER(GList)),]
 150
 151  def value(self):
 152    if not self.values:
 153      return None
 154
 155    return self.values.contents
 156