[Webkit-unassigned] [Bug 173856] New: [iOS DnD] [WK2] WKWebView does not handle drag sessions that exit and re-enter

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=173856

            Bug ID: 173856
           Summary: [iOS DnD] [WK2] WKWebView does not handle drag
                    sessions that exit and re-enter
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit2
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: wenson_hsieh at apple.com

Upon exiting a WKContentView, the dropSession is not cleared out. If the drag session re-enters the WKWebView, a *different* UIDropSession is sent to the drop delegate, causing us to bail in -dropInteraction:canHandleSession: and not handle the drag.

To fix this, we need to clear out dropSession when the drag session exits the view.

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