--- /dev/null
+/**
+ * Change the order of the table
+ * @param {object} oSettings dataTables settings object
+ * @param {bool} bApplyClasses optional - should we apply classes or not
+ * @memberof DataTable#oApi
+ */
+function _fnSort ( oSettings, bApplyClasses )
+{
+ var
+ i, iLen, j, jLen, k, kLen,
+ sDataType, nTh,
+ aaSort = [],
+ aiOrig = [],
+ oSort = DataTable.ext.oSort,
+ aoData = oSettings.aoData,
+ aoColumns = oSettings.aoColumns,
+ oAria = oSettings.oLanguage.oAria;
+
+ /* No sorting required if server-side or no sorting array */
+ if ( !oSettings.oFeatures.bServerSide &&
+ (oSettings.aaSorting.length !== 0 || oSettings.aaSortingFixed !== null) )
+ {
+ aaSort = ( oSettings.aaSortingFixed !== null ) ?
+ oSettings.aaSortingFixed.concat( oSettings.aaSorting ) :
+ oSettings.aaSorting.slice();
+
+ /* If there is a sorting data type, and a function belonging to it, then we need to
+ * get the data from the developer's function and apply it for this column
+ */
+ for ( i=0 ; i<aaSort.length ; i++ )
+ {
+ var iColumn = aaSort[i][0];
+ var iVisColumn = _fnColumnIndexToVisible( oSettings, iColumn );
+ sDataType = oSettings.aoColumns[ iColumn ].sSortDataType;
+ if ( DataTable.ext.afnSortData[sDataType] )
+ {
+ var aData = DataTable.ext.afnSortData[sDataType].call(
+ oSettings.oInstance, oSettings, iColumn, iVisColumn
+ );
+ if ( aData.length === aoData.length )
+ {
+ for ( j=0, jLen=aoData.length ; j<jLen ; j++ )
+ {
+ _fnSetCellData( oSettings, j, iColumn, aData[j] );
+ }
+ }
+ else
+ {
+ _fnLog( oSettings, 0, "Returned data sort array (col "+iColumn+") is the wrong length" );
+ }
+ }
+ }
+
+ /* Create a value - key array of the current row positions such that we can use their
+ * current position during the sort, if values match, in order to perform stable sorting
+ */
+ for ( i=0, iLen=oSettings.aiDisplayMaster.length ; i<iLen ; i++ )
+ {
+ aiOrig[ oSettings.aiDisplayMaster[i] ] = i;
+ }
+
+ /* Build an internal data array which is specific to the sort, so we can get and prep
+ * the data to be sorted only once, rather than needing to do it every time the sorting
+ * function runs. This make the sorting function a very simple comparison
+ */
+ var iSortLen = aaSort.length;
+ var fnSortFormat, aDataSort;
+ for ( i=0, iLen=aoData.length ; i<iLen ; i++ )
+ {
+ for ( j=0 ; j<iSortLen ; j++ )
+ {
+ aDataSort = aoColumns[ aaSort[j][0] ].aDataSort;
+
+ for ( k=0, kLen=aDataSort.length ; k<kLen ; k++ )
+ {
+ sDataType = aoColumns[ aDataSort[k] ].sType;
+ fnSortFormat = oSort[ (sDataType ? sDataType : 'string')+"-pre" ];
+
+ aoData[i]._aSortData[ aDataSort[k] ] = fnSortFormat ?
+ fnSortFormat( _fnGetCellData( oSettings, i, aDataSort[k], 'sort' ) ) :
+ _fnGetCellData( oSettings, i, aDataSort[k], 'sort' );
+ }
+ }
+ }
+
+ /* Do the sort - here we want multi-column sorting based on a given data source (column)
+ * and sorting function (from oSort) in a certain direction. It's reasonably complex to
+ * follow on it's own, but this is what we want (example two column sorting):
+ * fnLocalSorting = function(a,b){
+ * var iTest;
+ * iTest = oSort['string-asc']('data11', 'data12');
+ * if (iTest !== 0)
+ * return iTest;
+ * iTest = oSort['numeric-desc']('data21', 'data22');
+ * if (iTest !== 0)
+ * return iTest;
+ * return oSort['numeric-asc']( aiOrig[a], aiOrig[b] );
+ * }
+ * Basically we have a test for each sorting column, if the data in that column is equal,
+ * test the next column. If all columns match, then we use a numeric sort on the row
+ * positions in the original data array to provide a stable sort.
+ */
+ oSettings.aiDisplayMaster.sort( function ( a, b ) {
+ var k, l, lLen, iTest, aDataSort, sDataType;
+ for ( k=0 ; k<iSortLen ; k++ )
+ {
+ aDataSort = aoColumns[ aaSort[k][0] ].aDataSort;
+
+ for ( l=0, lLen=aDataSort.length ; l<lLen ; l++ )
+ {
+ sDataType = aoColumns[ aDataSort[l] ].sType;
+
+ iTest = oSort[ (sDataType ? sDataType : 'string')+"-"+aaSort[k][1] ](
+ aoData[a]._aSortData[ aDataSort[l] ],
+ aoData[b]._aSortData[ aDataSort[l] ]
+ );
+
+ if ( iTest !== 0 )
+ {
+ return iTest;
+ }
+ }
+ }
+
+ return oSort['numeric-asc']( aiOrig[a], aiOrig[b] );
+ } );
+ }
+
+ /* Alter the sorting classes to take account of the changes */
+ if ( (bApplyClasses === undefined || bApplyClasses) && !oSettings.oFeatures.bDeferRender )
+ {
+ _fnSortingClasses( oSettings );
+ }
+
+ for ( i=0, iLen=oSettings.aoColumns.length ; i<iLen ; i++ )
+ {
+ var sTitle = aoColumns[i].sTitle.replace( /<.*?>/g, "" );
+ nTh = aoColumns[i].nTh;
+ nTh.removeAttribute('aria-sort');
+ nTh.removeAttribute('aria-label');
+
+ /* In ARIA only the first sorting column can be marked as sorting - no multi-sort option */
+ if ( aoColumns[i].bSortable )
+ {
+ if ( aaSort.length > 0 && aaSort[0][0] == i )
+ {
+ nTh.setAttribute('aria-sort', aaSort[0][1]=="asc" ? "ascending" : "descending" );
+
+ var nextSort = (aoColumns[i].asSorting[ aaSort[0][2]+1 ]) ?
+ aoColumns[i].asSorting[ aaSort[0][2]+1 ] : aoColumns[i].asSorting[0];
+ nTh.setAttribute('aria-label', sTitle+
+ (nextSort=="asc" ? oAria.sSortAscending : oAria.sSortDescending) );
+ }
+ else
+ {
+ nTh.setAttribute('aria-label', sTitle+
+ (aoColumns[i].asSorting[0]=="asc" ? oAria.sSortAscending : oAria.sSortDescending) );
+ }
+ }
+ else
+ {
+ nTh.setAttribute('aria-label', sTitle);
+ }
+ }
+
+ /* Tell the draw function that we have sorted the data */
+ oSettings.bSorted = true;
+ $(oSettings.oInstance).trigger('sort', oSettings);
+
+ /* Copy the master data into the draw array and re-draw */
+ if ( oSettings.oFeatures.bFilter )
+ {
+ /* _fnFilter() will redraw the table for us */
+ _fnFilterComplete( oSettings, oSettings.oPreviousSearch, 1 );
+ }
+ else
+ {
+ oSettings.aiDisplay = oSettings.aiDisplayMaster.slice();
+ oSettings._iDisplayStart = 0; /* reset display back to page 0 */
+ _fnCalculateEnd( oSettings );
+ _fnDraw( oSettings );
+ }
+}
+
+
+/**
+ * Attach a sort handler (click) to a node
+ * @param {object} oSettings dataTables settings object
+ * @param {node} nNode node to attach the handler to
+ * @param {int} iDataIndex column sorting index
+ * @param {function} [fnCallback] callback function
+ * @memberof DataTable#oApi
+ */
+function _fnSortAttachListener ( oSettings, nNode, iDataIndex, fnCallback )
+{
+ _fnBindAction( nNode, {}, function (e) {
+ /* If the column is not sortable - don't to anything */
+ if ( oSettings.aoColumns[iDataIndex].bSortable === false )
+ {
+ return;
+ }
+
+ /*
+ * This is a little bit odd I admit... I declare a temporary function inside the scope of
+ * _fnBuildHead and the click handler in order that the code presented here can be used
+ * twice - once for when bProcessing is enabled, and another time for when it is
+ * disabled, as we need to perform slightly different actions.
+ * Basically the issue here is that the Javascript engine in modern browsers don't
+ * appear to allow the rendering engine to update the display while it is still executing
+ * it's thread (well - it does but only after long intervals). This means that the
+ * 'processing' display doesn't appear for a table sort. To break the js thread up a bit
+ * I force an execution break by using setTimeout - but this breaks the expected
+ * thread continuation for the end-developer's point of view (their code would execute
+ * too early), so we only do it when we absolutely have to.
+ */
+ var fnInnerSorting = function () {
+ var iColumn, iNextSort;
+
+ /* If the shift key is pressed then we are multiple column sorting */
+ if ( e.shiftKey )
+ {
+ /* Are we already doing some kind of sort on this column? */
+ var bFound = false;
+ for ( var i=0 ; i<oSettings.aaSorting.length ; i++ )
+ {
+ if ( oSettings.aaSorting[i][0] == iDataIndex )
+ {
+ bFound = true;
+ iColumn = oSettings.aaSorting[i][0];
+ iNextSort = oSettings.aaSorting[i][2]+1;
+
+ if ( !oSettings.aoColumns[iColumn].asSorting[iNextSort] )
+ {
+ /* Reached the end of the sorting options, remove from multi-col sort */
+ oSettings.aaSorting.splice( i, 1 );
+ }
+ else
+ {
+ /* Move onto next sorting direction */
+ oSettings.aaSorting[i][1] = oSettings.aoColumns[iColumn].asSorting[iNextSort];
+ oSettings.aaSorting[i][2] = iNextSort;
+ }
+ break;
+ }
+ }
+
+ /* No sort yet - add it in */
+ if ( bFound === false )
+ {
+ oSettings.aaSorting.push( [ iDataIndex,
+ oSettings.aoColumns[iDataIndex].asSorting[0], 0 ] );
+ }
+ }
+ else
+ {
+ /* If no shift key then single column sort */
+ if ( oSettings.aaSorting.length == 1 && oSettings.aaSorting[0][0] == iDataIndex )
+ {
+ iColumn = oSettings.aaSorting[0][0];
+ iNextSort = oSettings.aaSorting[0][2]+1;
+ if ( !oSettings.aoColumns[iColumn].asSorting[iNextSort] )
+ {
+ iNextSort = 0;
+ }
+ oSettings.aaSorting[0][1] = oSettings.aoColumns[iColumn].asSorting[iNextSort];
+ oSettings.aaSorting[0][2] = iNextSort;
+ }
+ else
+ {
+ oSettings.aaSorting.splice( 0, oSettings.aaSorting.length );
+ oSettings.aaSorting.push( [ iDataIndex,
+ oSettings.aoColumns[iDataIndex].asSorting[0], 0 ] );
+ }
+ }
+
+ /* Run the sort */
+ _fnSort( oSettings );
+ }; /* /fnInnerSorting */
+
+ if ( !oSettings.oFeatures.bProcessing )
+ {
+ fnInnerSorting();
+ }
+ else
+ {
+ _fnProcessingDisplay( oSettings, true );
+ setTimeout( function() {
+ fnInnerSorting();
+ if ( !oSettings.oFeatures.bServerSide )
+ {
+ _fnProcessingDisplay( oSettings, false );
+ }
+ }, 0 );
+ }
+
+ /* Call the user specified callback function - used for async user interaction */
+ if ( typeof fnCallback == 'function' )
+ {
+ fnCallback( oSettings );
+ }
+ } );
+}
+
+
+/**
+ * Set the sorting classes on the header, Note: it is safe to call this function
+ * when bSort and bSortClasses are false
+ * @param {object} oSettings dataTables settings object
+ * @memberof DataTable#oApi
+ */
+function _fnSortingClasses( oSettings )
+{
+ var i, iLen, j, jLen, iFound;
+ var aaSort, sClass;
+ var iColumns = oSettings.aoColumns.length;
+ var oClasses = oSettings.oClasses;
+
+ for ( i=0 ; i<iColumns ; i++ )
+ {
+ if ( oSettings.aoColumns[i].bSortable )
+ {
+ $(oSettings.aoColumns[i].nTh).removeClass( oClasses.sSortAsc +" "+ oClasses.sSortDesc +
+ " "+ oSettings.aoColumns[i].sSortingClass );
+ }
+ }
+
+ if ( oSettings.aaSortingFixed !== null )
+ {
+ aaSort = oSettings.aaSortingFixed.concat( oSettings.aaSorting );
+ }
+ else
+ {
+ aaSort = oSettings.aaSorting.slice();
+ }
+
+ /* Apply the required classes to the header */
+ for ( i=0 ; i<oSettings.aoColumns.length ; i++ )
+ {
+ if ( oSettings.aoColumns[i].bSortable )
+ {
+ sClass = oSettings.aoColumns[i].sSortingClass;
+ iFound = -1;
+ for ( j=0 ; j<aaSort.length ; j++ )
+ {
+ if ( aaSort[j][0] == i )
+ {
+ sClass = ( aaSort[j][1] == "asc" ) ?
+ oClasses.sSortAsc : oClasses.sSortDesc;
+ iFound = j;
+ break;
+ }
+ }
+ $(oSettings.aoColumns[i].nTh).addClass( sClass );
+
+ if ( oSettings.bJUI )
+ {
+ /* jQuery UI uses extra markup */
+ var jqSpan = $("span."+oClasses.sSortIcon, oSettings.aoColumns[i].nTh);
+ jqSpan.removeClass(oClasses.sSortJUIAsc +" "+ oClasses.sSortJUIDesc +" "+
+ oClasses.sSortJUI +" "+ oClasses.sSortJUIAscAllowed +" "+ oClasses.sSortJUIDescAllowed );
+
+ var sSpanClass;
+ if ( iFound == -1 )
+ {
+ sSpanClass = oSettings.aoColumns[i].sSortingClassJUI;
+ }
+ else if ( aaSort[iFound][1] == "asc" )
+ {
+ sSpanClass = oClasses.sSortJUIAsc;
+ }
+ else
+ {
+ sSpanClass = oClasses.sSortJUIDesc;
+ }
+
+ jqSpan.addClass( sSpanClass );
+ }
+ }
+ else
+ {
+ /* No sorting on this column, so add the base class. This will have been assigned by
+ * _fnAddColumn
+ */
+ $(oSettings.aoColumns[i].nTh).addClass( oSettings.aoColumns[i].sSortingClass );
+ }
+ }
+
+ /*
+ * Apply the required classes to the table body
+ * Note that this is given as a feature switch since it can significantly slow down a sort
+ * on large data sets (adding and removing of classes is always slow at the best of times..)
+ * Further to this, note that this code is admittedly fairly ugly. It could be made a lot
+ * simpler using jQuery selectors and add/removeClass, but that is significantly slower
+ * (on the order of 5 times slower) - hence the direct DOM manipulation here.
+ * Note that for deferred drawing we do use jQuery - the reason being that taking the first
+ * row found to see if the whole column needs processed can miss classes since the first
+ * column might be new.
+ */
+ sClass = oClasses.sSortColumn;
+
+ if ( oSettings.oFeatures.bSort && oSettings.oFeatures.bSortClasses )
+ {
+ var nTds = _fnGetTdNodes( oSettings );
+
+ /* Determine what the sorting class for each column should be */
+ var iClass, iTargetCol;
+ var asClasses = [];
+ for (i = 0; i < iColumns; i++)
+ {
+ asClasses.push("");
+ }
+ for (i = 0, iClass = 1; i < aaSort.length; i++)
+ {
+ iTargetCol = parseInt( aaSort[i][0], 10 );
+ asClasses[iTargetCol] = sClass + iClass;
+
+ if ( iClass < 3 )
+ {
+ iClass++;
+ }
+ }
+
+ /* Make changes to the classes for each cell as needed */
+ var reClass = new RegExp(sClass + "[123]");
+ var sTmpClass, sCurrentClass, sNewClass;
+ for ( i=0, iLen=nTds.length; i<iLen; i++ )
+ {
+ /* Determine which column we're looking at */
+ iTargetCol = i % iColumns;
+
+ /* What is the full list of classes now */
+ sCurrentClass = nTds[i].className;
+ /* What sorting class should be applied? */
+ sNewClass = asClasses[iTargetCol];
+ /* What would the new full list be if we did a replacement? */
+ sTmpClass = sCurrentClass.replace(reClass, sNewClass);
+
+ if ( sTmpClass != sCurrentClass )
+ {
+ /* We changed something */
+ nTds[i].className = $.trim( sTmpClass );
+ }
+ else if ( sNewClass.length > 0 && sCurrentClass.indexOf(sNewClass) == -1 )
+ {
+ /* We need to add a class */
+ nTds[i].className = sCurrentClass + " " + sNewClass;
+ }
+ }
+ }
+}
+
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