Josh Matthews於 2013年10月9日星期三UTC+8下午6時18分49秒寫道： > nsPIDOMWindow is one of the classes that nsGlobalWindow inherits from. > > They're mostly interchangeable in practice. > > > > On 10/08/2013 08:59 PM, [email protected] wrote: > > > Hi, > > > > > > In Gaia, we can add an eventlistener for some specific sensors, let's say > > "devicelight". > > > > > > By tracing the call, this will call nsEventListenerManager.cpp in gecko, > > > > > > however, in gecko, i assume this will then go to nsGlobalWindow.cpp but > > there is one code confuses me. > > > > > > nsCOMPtr<nsPIDOMWindow> window = GetTargetAsInnerWindow(); > > > > > > The context is: > > > > > > nsCOMPtr<nsPIDOMWindow> window = GetTargetAsInnerWindow(); > > > if (!window) { > > > return; > > > } > > > > > > switch (aType) { > > > case NS_DEVICE_LIGHT: > > > window->EnableDeviceSensor(SENSOR_LIGHT); > > > break; > > > } > > > > > > > > > I dont understand the role of "nsCOMPtr<nsPIDOMWindow> window = > > GetTargetAsInnerWindow();" here since I expect to see nsGlobalWindow. > > > > > > > > > Can anyone explain a bit here? Thanks > > >
I see. Thanks! _______________________________________________ dev-b2g mailing list [email protected] https://lists.mozilla.org/listinfo/dev-b2g
