[Webkit-unassigned] [Bug 149264] IFrame scrolling=yes is ignored in iOS Safari

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Fri Apr 28 10:56:18 PDT 2017


https://bugs.webkit.org/show_bug.cgi?id=149264

--- Comment #13 from Simon Fraser (smfr) <simon.fraser at apple.com> ---
(In reply to Frédéric Wang (:fredw) from comment #12)
> Is the suggestion of comment 5 enough? Any other idea?

No, it's much too late to use the viewport tag as a key to not frame flatten.

> Scrolling with touch events does not work at the moment with iframes even
> with that patch. As I see, 'overflow:auto' content creates
> ScrollingTreeOverflowScrollingNodeIOS nodes in order to capture these
> events. Should we add such mechanism for iframes too?

There's a bunch of work that has to happen to make frames/iframes scrollable, involving educating the scrolling state tree & scrolling tree about scrollable frames (we don't even do that on Mac yet), making latching work correctly etc. Then the UI process has to be fixed to make UIScrollViews for scrollable frames.

I think the best course of action would be to make iframes fast-scrollable on Mac first, to set up that infrastructure.

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