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Bug 1112212 - Add may-have flags for key event and input event listeners; r=smaug

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This commit is contained in:
Jim Chen 2015-01-10 12:41:57 -05:00
parent 3a859201f0
commit 3e6ccc7c35
2 changed files with 32 additions and 1 deletions
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16
dom/events/EventListenerManager.cpp
View File

@ -101,6 +101,8 @@ EventListenerManager::EventListenerManager(EventTarget* aTarget)
, mMayHaveScrollWheelEventListener(false)
, mMayHaveMouseEnterLeaveEventListener(false)
, mMayHavePointerEnterLeaveEventListener(false)
, mMayHaveKeyEventListener(false)
, mMayHaveInputOrCompositionEventListener(false)
, mClearingListeners(false)
, mIsMainThreadELM(NS_IsMainThread())
, mNoListenerForEvent(0)
@ -386,7 +388,21 @@ EventListenerManager::AddEventListenerInternal(
window->SetHasGamepadEventListener();
}
#endif
} else if (aTypeAtom == nsGkAtoms::onkeydown ||
aTypeAtom == nsGkAtoms::onkeypress ||
aTypeAtom == nsGkAtoms::onkeyup) {
if (!aFlags.mInSystemGroup) {
mMayHaveKeyEventListener = true;
}
} else if (aTypeAtom == nsGkAtoms::oncompositionend ||
aTypeAtom == nsGkAtoms::oncompositionstart ||
aTypeAtom == nsGkAtoms::oncompositionupdate ||
aTypeAtom == nsGkAtoms::oninput) {
if (!aFlags.mInSystemGroup) {
mMayHaveInputOrCompositionEventListener = true;
}
}
if (aTypeAtom && mTarget) {
mTarget->EventListenerAdded(aTypeAtom);
}

17
dom/events/EventListenerManager.h
View File

@ -403,6 +403,19 @@ public:
bool MayHaveMouseEnterLeaveEventListener() { return mMayHaveMouseEnterLeaveEventListener; }
bool MayHavePointerEnterLeaveEventListener() { return mMayHavePointerEnterLeaveEventListener; }
/**
* Returns true if there may be a key event listener (keydown, keypress,
* or keyup) registered, or false if there definitely isn't.
*/
bool MayHaveKeyEventListener() { return mMayHaveKeyEventListener; }
/**
* Returns true if there may be an advanced input event listener (input,
* compositionstart, compositionupdate, or compositionend) registered,
* or false if there definitely isn't.
*/
bool MayHaveInputOrCompositionEventListener() { return mMayHaveInputOrCompositionEventListener; }
size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const;
uint32_t ListenerCount() const
@ -553,9 +566,11 @@ protected:
uint32_t mMayHaveScrollWheelEventListener : 1;
uint32_t mMayHaveMouseEnterLeaveEventListener : 1;
uint32_t mMayHavePointerEnterLeaveEventListener : 1;
uint32_t mMayHaveKeyEventListener : 1;
uint32_t mMayHaveInputOrCompositionEventListener : 1;
uint32_t mClearingListeners : 1;
uint32_t mIsMainThreadELM : 1;
uint32_t mNoListenerForEvent : 23;
uint32_t mNoListenerForEvent : 20;
nsAutoTObserverArray<Listener, 2> mListeners;
dom::EventTarget* mTarget; // WEAK