[Webkit-unassigned] [Bug 191691] New: Tooltip is partly rendered off screen

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=191691

            Bug ID: 191691
           Summary: Tooltip is partly rendered off screen
           Product: WebKit
           Version: Safari Technology Preview
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: New Bugs
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: spamfaenger at gmx.de

Created attachment 354935

  --> https://bugs.webkit.org/attachment.cgi?id=354935&action=review

Screenshot of the partly off screen tooltip. The top end of the screenshot is where my screen ends.

While experimenting with multi-line tooltips we discovered that the algorithm to choose where to render them likes to place part of them off screen, by preferring to have the end of the tooltip always start at the mouse location. This can be seen in the attached screenshot. (What you see there is part of a screenshot. I have cut off something at the left, bottom and right, but the top is just where my screen ends)

Now I understand that we are maybe overusing the tooltips here, but still it would be nice if the Tooltips where _not_ rendered partly off screen if possible.

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