[Webkit-unassigned] [Bug 56658] New: REGRESSION (float-based line boxes): Gaps and overlaps in selection highlight

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=56658

           Summary: REGRESSION (float-based line boxes): Gaps and overlaps
                    in selection highlight
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh
        OS/Version: All
            Status: NEW
          Keywords: NeedsRadar, Regression
          Severity: Normal
          Priority: P1
         Component: New Bugs
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: mitz at webkit.org


Created an attachment (id=86179)
 --> (https://bugs.webkit.org/attachment.cgi?id=86179&action=review)
Test case

When using a font with non-integer advances, there are sometimes gaps in the selection highlight between line boxes or between line box and gap rects. You can see this by highlighting text in the attached test case. I’ve also seen overlapping highlights and sometimes leftover highlight bits when clearing the selection.

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