class Cell():
"""
>>> from attribute import Attribute
>>> cell = Cell()
>>> attr = Attribute()
>>> cell.get()
u' '
>>> cell.write(0x34, attr)
>>> cell.get()
u'4'
>>> cell.clear(attr._attrvalue)
>>> cell.get()
u' '
>>> cell.write(0x3042, attr)
>>> cell.get()
u'\u3042'
>>> cell.pad()
>>> cell.get()
>>> cell.write(0x09a4, attr)
>>> cell.get()
u'\u09a4'
>>> cell.combine(0x20DE)
>>> cell.get()
u'\u09a4\u20de'
>>> cell.combine(0x20DD)
>>> cell.get()
u'\u09a4\u20de\u20dd'
>>> cell.combine(0x0308)
>>> cell.get()
u'\u09a4\u20de\u20dd\u0308'
"""
_value = None
_combine = None
def __init__(self):
self._value = 0x20
self.attr = Attribute()
def write(self, value, attr):
self._value = value
self.attr.copyfrom(attr)
def pad(self):
self._value = None
def combine(self, value):
if self._combine:
self._combine += unichr(value)
else:
self._combine = unichr(value)
def get(self):
c = self._value
if c is None:
return None
if c < 0x10000:
result = unichr(c)
else: # c > 0x10000
c -= 0x10000
c1 = (c >> 10) + 0xd800
c2 = (c & 0x3ff) + 0xdc00
result = unichr(c1) + unichr(c2)
if self._combine is None:
return result
return result + self._combine
def clear(self, attrvalue):
self._value = 0x20
self._combine = None
self.attr.setvalue(attrvalue)
