Exemplo n.º 1
0
class OrderedExtensionsOption(ListOption):
    """A comma separated, ordered, list of components implementing `interface`.
    Can be empty.

    If `include_missing` is true (the default) all components implementing the
    interface are returned, with those specified by the option ordered first."""

    def __init__(self, section, name, interface, default=None,
                 include_missing=True, doc=''):
        ListOption.__init__(self, section, name, default, doc=doc)
        self.xtnpt = ExtensionPoint(interface)
        self.include_missing = include_missing

    def __get__(self, instance, owner):
        if instance is None:
            return self
        order = ListOption.__get__(self, instance, owner)
        components = []
        for impl in self.xtnpt.extensions(instance):
            if self.include_missing or impl.__class__.__name__ in order:
                components.append(impl)

        def compare(x, y):
            x, y = x.__class__.__name__, y.__class__.__name__
            if x not in order:
                return int(y in order)
            if y not in order:
                return -int(x in order)
            return cmp(order.index(x), order.index(y))
        components.sort(compare)
        return components
Exemplo n.º 2
0
class ExtensionOption(Option):

    def __init__(self, section, name, interface, default=None, doc=''):
        Option.__init__(self, section, name, default, doc)
        self.xtnpt = ExtensionPoint(interface)

    def __get__(self, instance, owner):
        if instance is None:
            return self
        value = Option.__get__(self, instance, owner)
        for impl in self.xtnpt.extensions(instance):
            if impl.__class__.__name__ == value:
                return impl
        raise AttributeError('Cannot find an implementation of the "%s" '
                             'interface named "%s".  Please update the option '
                             '%s.%s in trac.ini.'
                             % (self.xtnpt.interface.__name__, value,
                                self.section, self.name))
Exemplo n.º 3
0
 def __init__(self, section, name, interface, default=None,
              include_missing=True, doc=''):
     ListOption.__init__(self, section, name, default, doc=doc)
     self.xtnpt = ExtensionPoint(interface)
     self.include_missing = include_missing
Exemplo n.º 4
0
 def __init__(self, section, name, interface, default=None, doc=''):
     Option.__init__(self, section, name, default, doc)
     self.xtnpt = ExtensionPoint(interface)