"": function()

in uima-ducc-web/src/main/webapp/root/opensources/DataTables-1.10.1/extensions/Scroller/js/dataTables.scroller.js [739:845]
69 lines of code
23 McCabe index (conditional complexity)

	"_fnDrawCallback": function ()
	{
		var
			that = this,
			heights = this.s.heights,
			iScrollTop = this.dom.scroller.scrollTop,
			iActualScrollTop = iScrollTop,
			iScrollBottom = iScrollTop + heights.viewport,
			iTableHeight = $(this.s.dt.nTable).height(),
			displayStart = this.s.dt._iDisplayStart,
			displayLen = this.s.dt._iDisplayLength,
			displayEnd = this.s.dt.fnRecordsDisplay();

		// Disable the scroll event listener while we are updating the DOM
		this.s.skip = true;

		// Resize the scroll forcing element
		this._fnScrollForce();

		// Reposition the scrolling for the updated virtual position if needed
		if ( displayStart === 0 ) {
			// Linear calculation at the top of the table
			iScrollTop = this.s.topRowFloat * heights.row;
		}
		else if ( displayStart + displayLen >= displayEnd ) {
			// Linear calculation that the bottom as well
			iScrollTop = heights.scroll - ((displayEnd - this.s.topRowFloat) * heights.row);
		}
		else {
			// Domain scaled in the middle
			iScrollTop = this._domain( 'virtualToPhysical', this.s.topRowFloat * heights.row );
		}

		this.dom.scroller.scrollTop = iScrollTop;

		// Store positional information so positional calculations can be based
		// upon the current table draw position
		this.s.baseScrollTop = iScrollTop;
		this.s.baseRowTop = this.s.topRowFloat;

		// Position the table in the virtual scroller
		var tableTop = iScrollTop - ((this.s.topRowFloat - displayStart) * heights.row);
		if ( displayStart === 0 ) {
			tableTop = 0;
		}
		else if ( displayStart + displayLen >= displayEnd ) {
			tableTop = heights.scroll - iTableHeight;
		}

		this.dom.table.style.top = tableTop+'px';

		/* Cache some information for the scroller */
		this.s.tableTop = tableTop;
		this.s.tableBottom = iTableHeight + this.s.tableTop;

		// Calculate the boundaries for where a redraw will be triggered by the
		// scroll event listener
		var boundaryPx = (iScrollTop - this.s.tableTop) * this.s.boundaryScale;
		this.s.redrawTop = iScrollTop - boundaryPx;
		this.s.redrawBottom = iScrollTop + boundaryPx;

		this.s.skip = false;

		// Restore the scrolling position that was saved by DataTable's state
		// saving Note that this is done on the second draw when data is Ajax
		// sourced, and the first draw when DOM soured
		if ( this.s.dt.oFeatures.bStateSave && this.s.dt.oLoadedState !== null &&
			 typeof this.s.dt.oLoadedState.iScroller != 'undefined' )
		{
			// A quirk of DataTables is that the draw callback will occur on an
			// empty set if Ajax sourced, but not if server-side processing.
			var ajaxSourced = (this.s.dt.sAjaxSource || that.s.dt.ajax) && ! this.s.dt.oFeatures.bServerSide ?
				true :
				false;

			if ( ( ajaxSourced && this.s.dt.iDraw == 2) ||
			     (!ajaxSourced && this.s.dt.iDraw == 1) )
			{
				setTimeout( function () {
					$(that.dom.scroller).scrollTop( that.s.dt.oLoadedState.iScroller );
					that.s.redrawTop = that.s.dt.oLoadedState.iScroller - (heights.viewport/2);

					// In order to prevent layout thrashing we need another
					// small delay
					setTimeout( function () {
						that.s.ingnoreScroll = false;
					}, 0 );
				}, 0 );
			}
		}
		else {
			that.s.ingnoreScroll = false;
		}

		// Because of the order of the DT callbacks, the info update will
		// take precedence over the one we want here. So a 'thread' break is
		// needed
		setTimeout( function () {
			that._fnInfo.call( that );
		}, 0 );

		// Hide the loading indicator
		if ( this.dom.loader && this.s.loaderVisible ) {
			this.dom.loader.css( 'display', 'none' );
			this.s.loaderVisible = false;
		}
	},