From 3e82ac05b113eee4a08510600dd02c7c695f0b88 Mon Sep 17 00:00:00 2001 From: Moonchild Date: Fri, 15 May 2020 11:04:41 +0000 Subject: Issue #80- De-unify gfx/layers Excludes layers/ipc/CompositorBridgeParent and CrossProcessCompositorBridgeParent because the latter purposely uses functions implemented in the former. See also code comment in CrossProcessCompositorBridgeParent.cpp Note: likely dead code for us anyway; likely not worth investing in to solve. --- gfx/layers/apz/src/APZCTreeManager.cpp | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'gfx/layers/apz/src/APZCTreeManager.cpp') diff --git a/gfx/layers/apz/src/APZCTreeManager.cpp b/gfx/layers/apz/src/APZCTreeManager.cpp index f54326360..00eb3f183 100644 --- a/gfx/layers/apz/src/APZCTreeManager.cpp +++ b/gfx/layers/apz/src/APZCTreeManager.cpp @@ -85,6 +85,21 @@ struct APZCTreeManager::TreeBuildingState { std::map mApzcMap; }; +// Returns whether or not a wheel event action will be (or was) performed by +// APZ. If this returns true, the event must not perform a synchronous +// scroll. +// +// Even if this returns false, all wheel events in APZ-aware widgets must +// be sent through APZ so they are transformed correctly for TabParent. +static bool +WillHandleWheelEvent(WidgetWheelEvent* aEvent) +{ + return EventStateManager::WheelEventIsScrollAction(aEvent) && + (aEvent->mDeltaMode == nsIDOMWheelEvent::DOM_DELTA_LINE || + aEvent->mDeltaMode == nsIDOMWheelEvent::DOM_DELTA_PIXEL || + aEvent->mDeltaMode == nsIDOMWheelEvent::DOM_DELTA_PAGE); +} + class APZCTreeManager::CheckerboardFlushObserver : public nsIObserver { public: NS_DECL_ISUPPORTS -- cgit v1.2.3