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Bug 1507279 - Expose the visual scrolling mechanism to internal JS users. r=kats

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Differential Revision: https://phabricator.services.mozilla.com/D16142
This commit is contained in:
Botond Ballo
2019-01-10 20:59:21 +00:00
parent dae45663b6
commit 42b865718e
2 changed files with 30 additions and 0 deletions
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17
dom/base/nsDOMWindowUtils.cpp
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@@ -1396,6 +1396,23 @@ nsDOMWindowUtils::GetScrollXYFloat(bool aFlushLayout, float* aScrollX,
return NS_OK;
}
NS_IMETHODIMP
nsDOMWindowUtils::ScrollToVisual(float aOffsetX, float aOffsetY) {
nsCOMPtr<Document> doc = GetDocument();
NS_ENSURE_STATE(doc);
nsPresContext* presContext = doc->GetPresContext();
NS_ENSURE_TRUE(presContext, NS_ERROR_NOT_AVAILABLE);
// This should only be called on the root content document.
NS_ENSURE_TRUE(presContext->IsRootContentDocument(), NS_ERROR_INVALID_ARG);
presContext->PresShell()->SetPendingVisualViewportOffset(
Some(CSSPoint::ToAppUnits(CSSPoint(aOffsetX, aOffsetY))));
return NS_OK;
}
NS_IMETHODIMP
nsDOMWindowUtils::GetVisualViewportOffsetRelativeToLayoutViewport(
float* aOffsetX, float* aOffsetY) {