[Webkit-unassigned] [Bug 163911] window.find does not scroll with overflow:auto content on mobile Safari

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=163911

--- Comment #11 from Frédéric Wang (:fredw) <fred.wang at free.fr> ---
For the record, here are relevant backtraces for Focus (tab to an input field) and Find features. For the former feature, scrollRectToVisible is used for scrolling and _zoomToFocusRect is used for zooming. For the latter feature, scrollRectVisible is not called (as explained in comment 4). Instead, FindController::updateFindIndicator will rely on SmartMagnificationController to perform the scrolling and zooming... But this only works for the main frame :-(

== Focus ==

WebProcess:

WebCore::RenderLayer::scrollRectToVisible
WebCore::FrameSelection::revealSelection
WebCore::HTMLInputElement::updateFocusAppearance
WebCore::Element::focus

UIProcess:

-[WKContentView _zoomToFocusRect]
-[WKContentView _displayFormNodeInputView]

== Find ==

WebProcess:

WebCore::Editor::findString (FrameSelection::revealSelection and hence RenderLayer::scrollRectToVisible not called)
WebCore::Page::findString
WebKit::FindController::findString (DoNotRevealSelection is set)
WebKit::WebPage::findString

WebKit::FindController::updateFindIndicator (send magnify IPC message)
WebKit::FindController::updateFindUIAfterPageScroll
WebKit::DrawingArea::dispatchAfterEnsuringUpdatedScrollPosition
WebKit::FindController::findString
WebKit::WebPage::findString

UIProcess:

-[WKWebView _zoomToRect] (either _scrollToRect or _zoomToRect is called)
-[WKContentView _zoomToRect]
-[SmartMagnificationController::magnify]

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