[Webkit-unassigned] [Bug 110435] New: ScrollView should pass virtual viewport when calling scrollContentsFastPath and scrollContentsSlowPath.

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Wed Feb 20 23:31:29 PST 2013


https://bugs.webkit.org/show_bug.cgi?id=110435

           Summary: ScrollView should pass virtual viewport when calling
                    scrollContentsFastPath and scrollContentsSlowPath.
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Frames
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: luxtella at company100.net


Currently, ScrollView doesn't pass correct virtual viewport, so this patch fixes it.
In detail, ScrollView::scrollContents() uses ScrollView::rectToCopyOnScroll() to
get virtual viewport, but rectToCopyOnScroll() assumed the location of its own
virtual viewport is always (0, 0).

For your information, http://trac.webkit.org/wiki/ScalesAndZooms explains what
it virtual viewport.

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