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Bug 757680 - Add a pref to turn off event coalescing. r=kats

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This commit is contained in:
Wes Johnston 2012-08-09 12:54:36 -07:00
parent 648c7e9553
commit be7b3c9a7c
3 changed files with 12 additions and 1 deletions
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3
mobile/android/app/mobile.js
View File

@ -688,3 +688,6 @@ pref("reader.color_scheme", "light");
// Used to show a first-launch tip in reader
pref("reader.has_used_toolbar", false);
// Coalesce touch events to prevent them from flooding the event queue
pref("dom.event.touch.coalescing.enabled", true);

9
widget/android/nsAppShell.cpp
View File

@ -213,9 +213,11 @@ nsAppShell::NotifyNativeEvent()
#define PREFNAME_MATCH_OS "intl.locale.matchOS"
#define PREFNAME_UA_LOCALE "general.useragent.locale"
#define PREFNAME_COALESCE_TOUCHES "dom.event.touch.coalescing.enabled"
static const char* kObservedPrefs[] = {
PREFNAME_MATCH_OS,
PREFNAME_UA_LOCALE,
PREFNAME_COALESCE_TOUCHES,
nullptr
};
@ -262,6 +264,7 @@ nsAppShell::Init()
}
bridge->SetSelectedLocale(locale);
mAllowCoalescingTouches = Preferences::GetBool(PREFNAME_COALESCE_TOUCHES, true);
return rv;
}
@ -278,6 +281,8 @@ nsAppShell::Observe(nsISupports* aSubject,
} else if (!strcmp(aTopic, NS_PREFBRANCH_PREFCHANGE_TOPIC_ID) && aData && (
nsDependentString(aData).Equals(
NS_LITERAL_STRING(PREFNAME_UA_LOCALE)) ||
nsDependentString(aData).Equals(
NS_LITERAL_STRING(PREFNAME_COALESCE_TOUCHES)) ||
nsDependentString(aData).Equals(
NS_LITERAL_STRING(PREFNAME_MATCH_OS)))) {
AndroidBridge* bridge = AndroidBridge::Bridge();
@ -301,6 +306,8 @@ nsAppShell::Observe(nsISupports* aSubject,
}
bridge->SetSelectedLocale(locale);
mAllowCoalescingTouches = Preferences::GetBool(PREFNAME_COALESCE_TOUCHES, true);
return NS_OK;
}
return NS_OK;
@ -761,7 +768,7 @@ nsAppShell::PostEvent(AndroidGeckoEvent *ae)
break;
case AndroidGeckoEvent::MOTION_EVENT:
if (ae->Action() == AndroidMotionEvent::ACTION_MOVE) {
if (ae->Action() == AndroidMotionEvent::ACTION_MOVE && mAllowCoalescingTouches) {
int len = mEventQueue.Length();
if (len > 0) {
AndroidGeckoEvent* event = mEventQueue[len - 1];

1
widget/android/nsAppShell.h
View File

@ -70,6 +70,7 @@ protected:
mozilla::AndroidGeckoEvent *mQueuedDrawEvent;
mozilla::AndroidGeckoEvent *mQueuedViewportEvent;
bool mAllowCoalescingNextDraw;
bool mAllowCoalescingTouches;
nsTArray<mozilla::AndroidGeckoEvent *> mEventQueue;
nsInterfaceHashtable<nsStringHashKey, nsIObserver> mObserversHash;