46 

    47 class absentfilectx(object):

    48     """Represents a file that's ostensibly in a context but is actually not

    49     present in it.

    50 

    51     This is here because it's very specific to the filemerge code for now --

    52     other code is likely going to break with the values this returns."""

    53     def __init__(self, ctx, f):

    54         self._ctx = ctx

    55         self._f = f

    56 

    57     def path(self):

    58         return self._f

    59 

    60     def size(self):

    61         return None

    62 

    63     def data(self):

    64         return None

    65 

    66     def filenode(self):

    67         return nullid

    68 

    69     _customcmp = True

    70     def cmp(self, fctx):

    71         """compare with other file context

    72 

    73         returns True if different from fctx.

    74         """

    75         return not (fctx.isabsent() and

    76                     fctx.ctx() == self.ctx() and

    77                     fctx.path() == self.path())

    78 

    79     def flags(self):

    80         return ''

    81 

    82     def changectx(self):

    83         return self._ctx

    84 

    85     def isbinary(self):

    86         return False

    87 

    88     def isabsent(self):

    89         return True