[Webkit-unassigned] [Bug 31920] New: REGRESSION (r38898): Using the up arrow in a textarea gets "stuck" at the beginning

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=31920

           Summary: REGRESSION (r38898): Using the up arrow in a textarea
                    gets "stuck" at the beginning
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: HTML Editing
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: alex at igalia.com
                CC: eric at webkit.org, ap at webkit.org,
                    justin.garcia at apple.com, ddkilzer at webkit.org,
                    bdakin at apple.com


The patch uploaded to fix the bug 13736 breaks the up arrow action. In order to
reproduce the problem you can:

1. Open the test LayoutTests/editing/selection/wrapped-line-caret-2.html
2. Move the cursor to a position in the second line after the character 3, in
the middle of the xs
3. Use up arrow to move to the first line

The expected result: the up arrow should move the cursor to the end of the
first line, after the space.

The actual result: the cursor moves to the beginning of the second line and if
you press up again the cursor does not move.

The regression is caused after the patch committed to solve that bug if we
comment the call to the searchAheadForBetterMatch we can move to the end of the
line with the up arrow.

I've checked it can be solved modifying the affinity.

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