[Webkit-unassigned] [Bug 30034] New: caretRangeFromPoint() returns wrong result for a zoomed and scrolled page

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=30034

           Summary: caretRangeFromPoint() returns wrong result for a
                    zoomed and scrolled page
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: HTML DOM
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: xji at chromium.org


Created an attachment (id=40556)
 --> (https://bugs.webkit.org/attachment.cgi?id=40556)
test case

Steps:
1. Open the attached HTML
2. click mouse somewhere to show the offset of mouse within the element
3. zoom the page *and* resize the window to make the page scroll
4. scroll the page horizontally and/or vertically, 
5. click mouse in the same place as step 2., observe the printed offset.

Results:
the printd offset is different when page is zoomed and scrolled.

Expected:
the printed offset should be the same.

Problem: in Document.caretRangeFromPoint()

    IntPoint point = roundedIntPoint(FloatPoint(x * zoomFactor, y *
zoomFactor)) + view()->scrollOffset();

    should be:

    IntPoint point = roundedIntPoint(FloatPoint((x + view()->scrollX()) *
zoomFactor, (y + view()->scrollY()) * zoomFactor));


Note:
Same bug applies to elementFromPoint() as well.

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