Function __setColumnVis

blockstrap/js/dependencies/tables.js:7887–7947

( settings, column, vis )

	
	
	var __setColumnVis = function ( settings, column, vis ) {
		var
			cols = settings.aoColumns,
			col  = cols[ column ],
			data = settings.aoData,
			row, cells, i, ien, tr;
	
		// Get
		if ( vis === undefined ) {
			return col.bVisible;
		}
	
		// Set
		// No change
		if ( col.bVisible === vis ) {
			return;
		}
	
		if ( vis ) {
			// Insert column
			// Need to decide if we should use appendChild or insertBefore
			var insertBefore = $.inArray( true, _pluck(cols, 'bVisible'), column+1 );
	
			for ( i=0, ien=data.length ; i<ien ; i++ ) {
				tr = data[i].nTr;
				cells = data[i].anCells;
	
				if ( tr ) {
					// insertBefore can act like appendChild if 2nd arg is null
					tr.insertBefore( cells[ column ], cells[ insertBefore ] || null );
				}
			}
		}
		else {
			// Remove column
			$( _pluck( settings.aoData, 'anCells', column ) ).detach();
	
			col.bVisible = false;
			_fnDrawHead( settings, settings.aoHeader );
			_fnDrawHead( settings, settings.aoFooter );
	
			_fnSaveState( settings );
		}
	
		// Common actions
		col.bVisible = vis;
		_fnDrawHead( settings, settings.aoHeader );
		_fnDrawHead( settings, settings.aoFooter );
	
		// Automatically adjust column sizing
		_fnAdjustColumnSizing( settings );
	
		// Realign columns for scrolling
		if ( settings.oScroll.sX || settings.oScroll.sY ) {
			_fnScrollDraw( settings );
		}
	
		_fnCallbackFire( settings, null, 'column-visibility', [settings, column, vis] );