ibus/attribute.py

   1 # vim:set noet ts=4:
   2 #
   3 # ibus - The Input Bus
   4 #
   5 # Copyright (c) 2007-2008 Huang Peng <shawn.p.huang@gmail.com>
   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
  15 # GNU Lesser General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU Lesser General Public
  18 # License along with this program; if not, write to the
  19 # Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  20 # Boston, MA  02111-1307  USA
  21
  22 import dbus
  23
  24 ATTR_TYPE_UNDERLINE = 1
  25 ATTR_TYPE_FOREGROUND = 2
  26 ATTR_TYPE_BACKGROUND = 3
  27
  28 class Attribute:
  29         def __init__ (self, type, value, start_index, end_index):
  30                 self._type = type
  31                 self._value = value
  32                 self._start_index = start_index
  33                 self._end_index = end_index
  34
  35         def to_dbus_value (self):
  36                 values = [dbus.UInt32 (self._type),
  37                                 dbus.UInt32 (self._value),
  38                                 dbus.UInt32 (self._start_index),
  39                                 dbus.UInt32 (self._end_index)]
  40                 return dbus.Array (values, signature="u")
  41
  42         def from_dbus_value (self, value):
  43                 if not isinstance (value, dbus.Array):
  44                         raise dbus.Exception ("Attribute must be dbus.Array (uuuu)")
  45
  46                 if len (value) != 4 or not all (map (lambda x: isinstance (x, dbus.UInt32), value)):
  47                         raise dbus.Exception ("Attribute must be dbus.Array (uuuu)")
  48
  49                 self._type = value[0]
  50                 self._value = value[1]
  51                 self._start_index = value[2]
  52                 self._end_index = value[3]
  53
  54 def attribute_from_dbus_value (value):
  55         attribute = Attribute (0, 0, 0, 0)
  56         attribute.from_dbus_value (value)
  57         return attribute
  58
  59 class AttributeUnderline (Attribute):
  60         def __init__(self, value, start_index, end_index):
  61                 Attribute.__init__ (self, ATTR_TYPE_UNDERLINE, value, start_index, end_index)
  62
  63 class AttributeForeground (Attribute):
  64         def __init__(self, value, start_index, end_index):
  65                 Attribute.__init__ (self, ATTR_TYPE_FOREGROUND, value, start_index, end_index)
  66
  67 class AttributeBackground (Attribute):
  68         def __init__(self, value, start_index, end_index):
  69                 Attribute.__init__ (self, ATTR_TYPE_BACKGROUND, value, start_index, end_index)
  70
  71 def ARGB (a, r, g, b):
  72         return ((a & 0xff)<<24) + ((r & 0xff) << 16) + ((g & 0xff) << 8) + (b & 0xff)
  73
  74 def RGB (r, g, b):
  75         return ARGB (255, r, g, b)
  76
  77 class AttrList:
  78         def __init__ (self, attrs = []):
  79                 self._attrs = []
  80                 for attr in attrs:
  81                         self.append (attr)
  82
  83         def append (self, attr):
  84                 assert isinstance (attr, Attribute)
  85                 self._attrs.append (attr)
  86
  87         def to_dbus_value (self):
  88                 array = dbus.Array (signature = "v")
  89                 for attr in self._attrs:
  90                         array.append (attr.to_dbus_value ())
  91                 return array
  92
  93         def from_dbus_value (self, value):
  94                 attrs = []
  95                 if not isinstance (value, dbus.Array):
  96                         raise IBusException ("AttrList must from dbus.Array (uuuu)")
  97
  98                 for v in value:
  99                         attr = attribute_from_dbus_value (v)
 100                         attrs.append (attr)
 101
 102                 self._attrs = attrs
 103
 104         def __iter__ (self):
 105                 return self._attrs.__iter__ ()
 106
 107 def attr_list_from_dbus_value (value):
 108         attrs = AttrList ()
 109         attrs.from_dbus_value (value)
 110         return attrs