Function _fnSortData

blockstrap/js/dependencies/tables.js:4654–4688

( settings, idx )

	// Get the data to sort a column, be it from cache, fresh (populating the
	// cache), or from a sort formatter
	function _fnSortData( settings, idx )
	{
		// Custom sorting function - provided by the sort data type
		var column = settings.aoColumns[ idx ];
		var customSort = DataTable.ext.order[ column.sSortDataType ];
		var customData;
	
		if ( customSort ) {
			customData = customSort.call( settings.oInstance, settings, idx,
				_fnColumnIndexToVisible( settings, idx )
			);
		}
	
		// Use / populate cache
		var row, cellData;
		var formatter = DataTable.ext.type.order[ column.sType+"-pre" ];
	
		for ( var i=0, ien=settings.aoData.length ; i<ien ; i++ ) {
			row = settings.aoData[i];
	
			if ( ! row._aSortData ) {
				row._aSortData = [];
			}
	
			if ( ! row._aSortData[idx] || customSort ) {
				cellData = customSort ?
					customData[i] : // If there was a custom sort function, use data from there
					_fnGetCellData( settings, i, idx, 'sort' );
	
				row._aSortData[ idx ] = formatter ?
					formatter( cellData ) :
					cellData;
			}
		}
	}