nsISelection2 Interface

 Return array of ranges intersecting with the given DOM interval.

void GetRangesForInterval(in nsIDOMNode beginNode, in PRInt32 beginOffset, in nsIDOMNode endNode, in PRInt32 endOffset, in PRBool allowAdjacent, out PRUint32 resultCount, [array, retval, size_is(resultCount)] out nsIDOMRange results)

 Scrolls a region of the selection, so that it is visible in
 the scrolled view.

 @param aRegion - the region inside the selection to scroll into view
                  (see selection region constants defined in
                   nsISelectionController).
 @param aIsSynchronous - when true, scrolls the selection into view
                         before returning. If false, posts a request which
                         is processed at some point after the method returns.
 @param aVPercent - how to align the frame vertically. A value of 0
                   means the frame's upper edge is aligned with the top edge
                   of the visible area. A value of 100 means the frame's
                   bottom edge is aligned with the bottom edge of
                   the visible area. For values in between, the point
                   "aVPercent" down the frame is placed at the point
                   "aVPercent" down the visible area. A value of 50 centers
                   the frame vertically. A value of -1 means move
                   the frame the minimum amount necessary in order for
                   the entire frame to be visible vertically (if possible).
 @param aHPercent - how to align the frame horizontally. A value of 0
                    means the frame's left edge is aligned with the left
                    edge of the visible area. A value of 100 means the
                    frame's right edge is aligned with the right edge of
                    the visible area. For values in between, the point
                    "aHPercent" across the frame is placed at the point
                    "aHPercent" across the visible area. A value of 50
                    centers the frame horizontally . A value of -1 means
                    move the frame the minimum amount necessary in order
                    for the entire frame to be visible horizontally
                    (if possible).

void scrollIntoView(in short aRegion, in boolean aIsSynchronous, in short aVPercent, in short aHPercent)