[Webkit-unassigned] [Bug 38213] New: Page up / page down moves edited content for the entire height

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=38213

           Summary: Page up / page down moves edited content for the
                    entire height
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: Frames
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: zelidrag at chromium.org
                CC: dglazkov at chromium.org, jamesr at chromium.org


Frame page up / page down scroll height calculation seems to be broken in
EditorCommand.cpp. Function verticalScrollDistance() assumes that the scrolling
distance for these operations is the entire client height instead of the
visible portion of it. 

Repro Steps:
1. Load a Google Doc, or any other page hosting an iframe that has vertical
scrollbar.
2. Select the frame content, then press Page Down to page down through the doc,
one page at a time.

Expect to page one page at a time.  Instead, it the page scrolls almost the
entire content height instead.

Check out http://crosbug.com/2562 for further details.

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