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########################################################################
#
# File Name: Event.py
#
#
"""
Implements DOM level 2 Mutation Events
WWW: http://4suite.com/4DOM e-mail: support@4suite.com
Copyright (c) 2000 Fourthought Inc, USA. All Rights Reserved.
See http://4suite.com/COPYRIGHT for license and copyright information
"""
supportedEvents = [
"DOMSubtreeModified",
"DOMNodeInserted",
"DOMNodeRemoved",
"DOMNodeRemovedFromDocument",
"DOMNodeInsertedIntoDocument",
"DOMAttrModified",
"DOMCharacterDataModified"
]
#Event Exception code
UNSPECIFIED_EVENT_TYPE_ERR = 0
class EventException:
def __init__(self, code):
self.code = code
class EventTarget:
"""
"""
def __init__(self):
self.listeners = {}
self.capture_listeners = {}
for etype in supportedEvents:
self.listeners[etype] = []
self.capture_listeners[etype] = []
def addEventListener(self, etype, listener, useCapture):
if useCapture:
if listener not in self.capture_listeners[etype]:
self.capture_listeners[etype].append(listener)
else:
if listener not in self.listeners[etype]:
self.listeners[etype].append(listener)
def removeEventListener(self, etype, listener, useCapture):
if useCapture:
self.capture_listeners[etype].remove(listener)
else:
self.listeners[etype].remove(listener)
def dispatchEvent(self, evt):
# The actual work is done in the implementing class
# since EventTarget has no idea of the DOM hierarchy
pass
class EventListener:
def __init__(self):
pass
def handleEvent(evt):
pass
class Event:
CAPTURING_PHASE = 1
AT_TARGET = 2
BUBBLING_PHASE = 3
def __init__(self, eventType):
self.target = None
self.currentTarget = None
self.eventPhase = Event.CAPTURING_PHASE
self.type = eventType
self.timeStamp = 0
def stopPropagation(self):
self._4dom_propagate = 0
def preventDefault(self):
self._4dom_preventDefaultCalled = 1
def initEvent(self, eventTypeArg, canBubbleArg, cancelableArg):
self.type = eventTypeArg
self.bubbles = canBubbleArg
self.cancelable = cancelableArg
self._4dom_preventDefaultCalled = 0
self._4dom_propagate = 1
class MutationEvent(Event):
#Whether or not the event bubbles
MODIFICATION = 1
ADDITION = 2
REMOVAL = 3
eventSpec = {
"DOMSubtreeModified": 1,
"DOMNodeInserted": 1,
"DOMNodeRemoved": 1,
"DOMNodeRemovedFromDocument": 0,
"DOMNodeInsertedIntoDocument": 0,
"DOMAttrModified": 1,
"DOMCharacterDataModified": 1
}
def __init__(self, eventType):
Event.__init__(self,eventType)
return
def initMutationEvent(self, eventTypeArg, canBubbleArg, cancelableArg,
relatedNodeArg, prevValueArg, newValueArg, attrNameArg):
Event.initEvent(self,eventTypeArg, canBubbleArg, cancelableArg)
# FIXME : make these attributes readonly
self.relatedNode = relatedNodeArg
self.prevValue = prevValueArg
self.newValue = newValueArg
self.attrName = attrNameArg
#No mutation events are cancelable
self.cancelable = 0
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