Layout:IntersectionObserver: Difference between revisions
Tschneider (talk | contribs) (Created page with "<big>'''Linking steps:'''</big> ''DOMIntersectionObserver::observe(Element& aTarget)'' adds ''aTarget'' to ''DOMIntersectionObserver::mObservationTargets'' and calls ''Elemen...") |
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<big><big>'''Lifetime'''</big></big> | |||
[[File:Intersection observer lifetime.png|thumbnail]] | |||
<big>'''Linking steps:'''</big> | <big>'''Linking steps:'''</big> | ||
Revision as of 17:41, 25 October 2017
Lifetime
Linking steps:
DOMIntersectionObserver::observe(Element& aTarget) adds aTarget to DOMIntersectionObserver::mObservationTargets and calls Element::RegisterIntersectionObsever on aTarget. If aTarget is the first item in DOMIntersectionObserver::mObservationTargets, nsDocument::AddIntersectionObserver is called and the observer gets added to nsDocument::mIntersectionObservers.
Element::RegisterIntersectionObserver(DOMIntersectionObserver* aObserver) adds aObserver to mSlots::mRegisteredIntersectionObservers.
Unlinking steps:
DOMIntersectionObserver::unobserve(Element& aTarget) removes aTarget from DOMIntersectionObserver::mObservationTargets and calls Element::UnregisterIntersectionObsever on aTarget. If aTarget is the last item in DOMIntersectionObserver::mObservationTargets, nsDocument::RemoveIntersectionObserver is called and the observer gets removed from nsDocument::mIntersectionObservers.
DOMIntersectionObserver::Disconnect() calls Element::UnregisterIntersectionObsever for every item in DOMIntersectionObserver::mObservationTargets.
Element::UnregisterIntersectionObserver(DOMIntersectionObserver* aObserver) removes aObserver from mSlots::mRegisteredIntersectionObservers.
DOMIntersectionObserver::~DOMIntersectionObserver calls DOMIntersectionObserver::Disconnect().
DOMIntersectionObserver::Unlink calls DOMIntersectionObserver::Disconnect().
nsNodeUtils::LastRelease calls DOMIntersectionObserver::UnlinkTarget for every observer in nsSlots::mRegisteredIntersectionObservers.
nsDomSlots::Unlink calls DOMIntersectionObserver::z for every observer in nsSlots::mRegisteredIntersectionObservers.