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Compute touch actions for touch point from remote layer tree regions
https://bugs.webkit.org/show_bug.cgi?id=196701 Reviewed by Simon Fraser. Add a function for finding the right layer and getting the touch actions in UI process side. The code is not used yet. * UIProcess/RemoteLayerTree/ios/RemoteLayerTreeViews.h: * UIProcess/RemoteLayerTree/ios/RemoteLayerTreeViews.mm: (WebKit::touchActionsForPoint): Use the same code as overlap hit testing for collecting the candidate layers for the touch point, taking event regions into account. Return the touch actions from the deepest event sensitive layer hit. (-[UIView _web_findDescendantViewAtPoint:withEvent:]): Modernize. Canonical link: https://commits.webkit.org/210981@main git-svn-id: https://svn.webkit.org/repository/webkit/trunk@244042 268f45cc-cd09-0410-ab3c-d52691b4dbfc
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