[Webkit-unassigned] [Bug 223415] New: AX: Accessibility pass-through drag events on ARIA sliders are being intercepted by text selection handlers

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=223415

            Bug ID: 223415
           Summary: AX: Accessibility pass-through drag events on ARIA
                    sliders are being intercepted by text selection
                    handlers
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Accessibility
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: jcraig at apple.com
                CC: webkit-bug-importer at group.apple.com

AX: Accessibility pass-through drag events on ARIA sliders are being intercepted by text selection handlers

Repro:
1. Load https://files.paciellogroup.com/blogmisc/ARIA/slider/
2. With VO on, select the slider thumb.
3. Double-tap and hold (wait for the tone if applicable) and drag left or right.

Results:
Text selection UI (with drag handles) appears.

Expected: 
VO pass-through drag should change the position of the slider thumb, resulting in the web app changing the aria-valuenow attribute, which then VoiceOver should announce. Similar to the expectation for native sliders...

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