[Webkit-unassigned] [Bug 122793] New: Make it possible to focus on 0-size form controls and anchors

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=122793

           Summary: Make it possible to focus on 0-size form controls and
                    anchors
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Keywords: BlinkMergeCandidate
          Severity: Normal
          Priority: P2
         Component: Forms
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: rniwa at webkit.org
                CC: darin at apple.com, ap at webkit.org, sam at webkit.org,
                    tkent at chromium.org


Consider merging https://chromium.googlesource.com/chromium/blink/+/53f8eba14b6362795bae47c02236ca93303264a6

We assumed form controls and anchor elements with 0-size were not
focusable. It's inconsistent with other elements with tabIndex or
contentEditable, and incompatible with IE11 and Firefox 23.

We remove rendererIsFocusable override of HTMLFormControlElement, and
remove renderer box check in HTMLAnchorElement::isKeyboardFocusable.

As for crbug.com/285595, when we removed focus from an input/textarea element by
0-size, the element kept the selection. So FrameSelection::setFocusedNodeIfNeeded
set focus on the element again when an editing command was invoked by a keyboard
input. This issue is revolved by this CL because we don't remove focus by
0-size.

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