[Webkit-unassigned] [Bug 15872] New: Selection of text draws line artifacts when multiple lines with varying font sizes are selected

[bugzilla-daemon at webkit.org]

http://bugs.webkit.org/show_bug.cgi?id=15872

           Summary: Selection of text draws line artifacts when multiple
                    lines with varying font sizes are selected
           Product: WebKit
           Version: 525+ (Nightly build)
          Platform: PC
               URL: fast\text\basic\generic-family-reset.html
        OS/Version: Windows XP
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: help.improve.safari at gmail.com


When a HTML page contains different lines of text, each in a different font
size and user selects the text by dragging the mouse, the background color
change draws wierd lines.

This is a problem only when different lines have different font sizes.

Repro
#####
1) Launch layout test fast\text\basic\generic-family-reset.html (attached)
2) Start selecting the text by dragging the mouse
3) Look for blue lines drawn on top and bottom of various glyphs.


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