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Bug 1127066 - Fold APZCCallbackHelper::UpdateCallbackTransform() into ScrollFrame(). r=kats

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--HG--
extra : source : 5b78d9e9ba84408c898d9e0ab55ae30f437792c8
This commit is contained in:
Botond Ballo 2015-01-28 17:40:29 -05:00
parent 98957944f7
commit eaf4eff1d2
4 changed files with 15 additions and 32 deletions
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2
dom/ipc/TabChild.cpp
View File

@ -539,7 +539,6 @@ TabChildBase::UpdateFrameHandler(const FrameMetrics& aFrameMetrics)
nsCOMPtr<nsIDOMWindowUtils> utils(GetDOMWindowUtils());
if (APZCCallbackHelper::HasValidPresShellId(utils, aFrameMetrics)) {
mLastRootMetrics = ProcessUpdateFrame(aFrameMetrics);
APZCCallbackHelper::UpdateCallbackTransform(aFrameMetrics, mLastRootMetrics);
return true;
}
} else {
@ -550,7 +549,6 @@ TabChildBase::UpdateFrameHandler(const FrameMetrics& aFrameMetrics)
if (content) {
FrameMetrics newSubFrameMetrics(aFrameMetrics);
APZCCallbackHelper::UpdateSubFrame(content, newSubFrameMetrics);
APZCCallbackHelper::UpdateCallbackTransform(aFrameMetrics, newSubFrameMetrics);
return true;
}
}

30
gfx/layers/apz/util/APZCCallbackHelper.cpp
View File

@ -111,8 +111,9 @@ ScrollFrameTo(nsIScrollableFrame* aFrame, const CSSPoint& aPoint, bool& aSuccess
* requested in |aMetrics|.
* The scroll offset in |aMetrics| is updated to reflect the actual scroll
* position.
* The displayport stored in |aMetrics| is updated to reflect any difference
* between the requested and actual scroll positions.
* The displayport stored in |aMetrics| and the callback-transform stored on
* the content are updated to reflect any difference between the requested
* and actual scroll positions.
*/
static void
ScrollFrame(nsIContent* aContent,
@ -121,7 +122,8 @@ ScrollFrame(nsIContent* aContent,
// Scroll the window to the desired spot
nsIScrollableFrame* sf = nsLayoutUtils::FindScrollableFrameFor(aMetrics.GetScrollId());
bool scrollUpdated = false;
CSSPoint actualScrollOffset = ScrollFrameTo(sf, aMetrics.GetScrollOffset(), scrollUpdated);
CSSPoint apzScrollOffset = aMetrics.GetScrollOffset();
CSSPoint actualScrollOffset = ScrollFrameTo(sf, apzScrollOffset, scrollUpdated);
if (scrollUpdated) {
// Correct the display port due to the difference between mScrollOffset and the
@ -138,6 +140,16 @@ ScrollFrame(nsIContent* aContent,
}
aMetrics.SetScrollOffset(actualScrollOffset);
// APZ transforms inputs assuming we applied the exact scroll offset it
// requested (|apzScrollOffset|). Since we may not have, record the difference
// between what APZ asked for and what we actually applied, and apply it to
// input events to compensate.
if (aContent) {
CSSPoint scrollDelta = apzScrollOffset - actualScrollOffset;
aContent->SetProperty(nsGkAtoms::apzCallbackTransform, new CSSPoint(scrollDelta),
nsINode::DeleteProperty<CSSPoint>);
}
}
static void
@ -300,18 +312,6 @@ APZCCallbackHelper::AcknowledgeScrollUpdate(const FrameMetrics::ViewID& aScrollI
}
}
void
APZCCallbackHelper::UpdateCallbackTransform(const FrameMetrics& aApzcMetrics, const FrameMetrics& aActualMetrics)
{
nsCOMPtr<nsIContent> content = nsLayoutUtils::FindContentFor(aApzcMetrics.GetScrollId());
if (!content) {
return;
}
CSSPoint scrollDelta = aApzcMetrics.GetScrollOffset() - aActualMetrics.GetScrollOffset();
content->SetProperty(nsGkAtoms::apzCallbackTransform, new CSSPoint(scrollDelta),
nsINode::DeleteProperty<CSSPoint>);
}
CSSPoint
APZCCallbackHelper::ApplyCallbackTransform(const CSSPoint& aInput,
const ScrollableLayerGuid& aGuid,

13
gfx/layers/apz/util/APZCCallbackHelper.h
View File

@ -75,19 +75,6 @@ public:
static void AcknowledgeScrollUpdate(const FrameMetrics::ViewID& aScrollId,
const uint32_t& aScrollGeneration);
/* Save an "input transform" property on the content element corresponding to
the scrollable content. This is needed because in some cases when the APZ code
sends a paint request via the GeckoContentController interface, we don't always
apply the scroll offset that was requested. Since the APZ code doesn't know
that we didn't apply it, it will transform inputs assuming that we had applied
it, and so we need to apply a fixup to the input to account for the fact that
we didn't.
The |aApzcMetrics| argument are the metrics that the APZ sent us, and the
|aActualMetrics| argument are the metrics representing the gecko state after we
applied some or all of the APZ metrics. */
static void UpdateCallbackTransform(const FrameMetrics& aApzcMetrics,
const FrameMetrics& aActualMetrics);
/* Apply an "input transform" to the given |aInput| and return the transformed value.
The input transform applied is the one for the content element corresponding to
|aGuid|; this is populated in a previous call to UpdateCallbackTransform. See that

2
widget/android/APZCCallbackHandler.cpp
View File

@ -90,7 +90,6 @@ APZCCallbackHandler::RequestContentRepaint(const FrameMetrics& aFrameMetrics)
if (utils && APZCCallbackHelper::HasValidPresShellId(utils, aFrameMetrics)) {
FrameMetrics metrics = aFrameMetrics;
APZCCallbackHelper::UpdateRootFrame(utils, metrics);
APZCCallbackHelper::UpdateCallbackTransform(aFrameMetrics, metrics);
}
} else {
// aFrameMetrics.mIsRoot is false, so we are trying to update a subframe.
@ -99,7 +98,6 @@ APZCCallbackHandler::RequestContentRepaint(const FrameMetrics& aFrameMetrics)
if (content) {
FrameMetrics newSubFrameMetrics(aFrameMetrics);
APZCCallbackHelper::UpdateSubFrame(content, newSubFrameMetrics);
APZCCallbackHelper::UpdateCallbackTransform(aFrameMetrics, newSubFrameMetrics);
}
}
}