class Context(object):
"""
:class:`Context` holds some key obejct during processing the event.
"""
mediator = None
"""
An instance of :class:`earo.mediator.Mediator`.
"""
source_event = None
"""
The event emitted by :class:`earo.app.App`.
"""
processor = None
"""
The :class:`earo.processor.Processor` to process `self.source_event`.
"""
process_flow = None
"""
The :class:`earo.processor.Processor` maked by `self.processor`.
"""
def __init__(self, mediator, source_event, processor):
self.mediator = mediator
self.source_event = source_event
self.processor = processor
self.process_flow = ProcessFlow(mediator, type(source_event))
def process(self):
"""
Use `self.processor` to do the process and set `self.process_flow`.
"""
self.processor.process(self)
def find_event(self, event_cls):
"""
A reference to :func:`earo.processor.ProcessFlow.find_event`.
"""
return self.process_flow.find_event(event_cls)
def why_no_emittion(self, event_cls):
"""
A reference to :func:`earo.processor.ProcessFlow.why_no_emittion`.
"""
return self.process_flow.why_no_emittion(event_cls)
def __init__(self, mediator, source_event, processor):
self.mediator = mediator
self.source_event = source_event
self.processor = processor
self.process_flow = ProcessFlow(mediator, type(source_event))
