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/** * Create a new TR element (and it's TD children) for a row * @param {object} oSettings dataTables settings object * @param {int} iRow Row to consider * @memberof DataTable#oApi */ function _fnCreateTr ( oSettings, iRow ) { var oData = oSettings.aoData[iRow]; var nTd; if ( oData.nTr === null ) { oData.nTr = document.createElement('tr'); /* Use a private property on the node to allow reserve mapping from the node * to the aoData array for fast look up */ oData.nTr._DT_RowIndex = iRow; /* Special parameters can be given by the data source to be used on the row */ if ( oData._aData.DT_RowId ) { oData.nTr.id = oData._aData.DT_RowId; } if ( oData._aData.DT_RowClass ) { oData.nTr.className = oData._aData.DT_RowClass; } /* Process each column */ for ( var i=0, iLen=oSettings.aoColumns.length ; i<iLen ; i++ ) { var oCol = oSettings.aoColumns[i]; nTd = document.createElement( oCol.sCellType ); /* Render if needed - if bUseRendered is true then we already have the rendered * value in the data source - so can just use that */ nTd.innerHTML = (typeof oCol.fnRender === 'function' && (!oCol.bUseRendered || oCol.mData === null)) ? _fnRender( oSettings, iRow, i ) : _fnGetCellData( oSettings, iRow, i, 'display' ); /* Add user defined class */ if ( oCol.sClass !== null ) { nTd.className = oCol.sClass; } if ( oCol.bVisible ) { oData.nTr.appendChild( nTd ); oData._anHidden[i] = null; } else { oData._anHidden[i] = nTd; } if ( oCol.fnCreatedCell ) { oCol.fnCreatedCell.call( oSettings.oInstance, nTd, _fnGetCellData( oSettings, iRow, i, 'display' ), oData._aData, iRow, i ); } } _fnCallbackFire( oSettings, 'aoRowCreatedCallback', null, [oData.nTr, oData._aData, iRow] ); } } /** * Create the HTML header for the table * @param {object} oSettings dataTables settings object * @memberof DataTable#oApi */ function _fnBuildHead( oSettings ) { var i, nTh, iLen, j, jLen; var iThs = $('th, td', oSettings.nTHead).length; var iCorrector = 0; var jqChildren; /* If there is a header in place - then use it - otherwise it's going to get nuked... */ if ( iThs !== 0 ) { /* We've got a thead from the DOM, so remove hidden columns and apply width to vis cols */ for ( i=0, iLen=oSettings.aoColumns.length ; i<iLen ; i++ ) { nTh = oSettings.aoColumns[i].nTh; nTh.setAttribute('role', 'columnheader'); if ( oSettings.aoColumns[i].bSortable ) { nTh.setAttribute('tabindex', oSettings.iTabIndex); nTh.setAttribute('aria-controls', oSettings.sTableId); } if ( oSettings.aoColumns[i].sClass !== null ) { $(nTh).addClass( oSettings.aoColumns[i].sClass ); } /* Set the title of the column if it is user defined (not what was auto detected) */ if ( oSettings.aoColumns[i].sTitle != nTh.innerHTML ) { nTh.innerHTML = oSettings.aoColumns[i].sTitle; } } } else { /* We don't have a header in the DOM - so we are going to have to create one */ var nTr = document.createElement( "tr" ); for ( i=0, iLen=oSettings.aoColumns.length ; i<iLen ; i++ ) { nTh = oSettings.aoColumns[i].nTh; nTh.innerHTML = oSettings.aoColumns[i].sTitle; nTh.setAttribute('tabindex', '0'); if ( oSettings.aoColumns[i].sClass !== null ) { $(nTh).addClass( oSettings.aoColumns[i].sClass ); } nTr.appendChild( nTh ); } $(oSettings.nTHead).html( '' )[0].appendChild( nTr ); _fnDetectHeader( oSettings.aoHeader, oSettings.nTHead ); } /* ARIA role for the rows */ $(oSettings.nTHead).children('tr').attr('role', 'row'); /* Add the extra markup needed by jQuery UI's themes */ if ( oSettings.bJUI ) { for ( i=0, iLen=oSettings.aoColumns.length ; i<iLen ; i++ ) { nTh = oSettings.aoColumns[i].nTh; var nDiv = document.createElement('div'); nDiv.className = oSettings.oClasses.sSortJUIWrapper; $(nTh).contents().appendTo(nDiv); var nSpan = document.createElement('span'); nSpan.className = oSettings.oClasses.sSortIcon; nDiv.appendChild( nSpan ); nTh.appendChild( nDiv ); } } if ( oSettings.oFeatures.bSort ) { for ( i=0 ; i<oSettings.aoColumns.length ; i++ ) { if ( oSettings.aoColumns[i].bSortable !== false ) { _fnSortAttachListener( oSettings, oSettings.aoColumns[i].nTh, i ); } else { $(oSettings.aoColumns[i].nTh).addClass( oSettings.oClasses.sSortableNone ); } } } /* Deal with the footer - add classes if required */ if ( oSettings.oClasses.sFooterTH !== "" ) { $(oSettings.nTFoot).children('tr').children('th').addClass( oSettings.oClasses.sFooterTH ); } /* Cache the footer elements */ if ( oSettings.nTFoot !== null ) { var anCells = _fnGetUniqueThs( oSettings, null, oSettings.aoFooter ); for ( i=0, iLen=oSettings.aoColumns.length ; i<iLen ; i++ ) { if ( anCells[i] ) { oSettings.aoColumns[i].nTf = anCells[i]; if ( oSettings.aoColumns[i].sClass ) { $(anCells[i]).addClass( oSettings.aoColumns[i].sClass ); } } } } } /** * Draw the header (or footer) element based on the column visibility states. The * methodology here is to use the layout array from _fnDetectHeader, modified for * the instantaneous column visibility, to construct the new layout. The grid is * traversed over cell at a time in a rows x columns grid fashion, although each * cell insert can cover multiple elements in the grid - which is tracks using the * aApplied array. Cell inserts in the grid will only occur where there isn't * already a cell in that position. * @param {object} oSettings dataTables settings object * @param array {objects} aoSource Layout array from _fnDetectHeader * @param {boolean} [bIncludeHidden=false] If true then include the hidden columns in the calc, * @memberof DataTable#oApi */ function _fnDrawHead( oSettings, aoSource, bIncludeHidden ) { var i, iLen, j, jLen, k, kLen, n, nLocalTr; var aoLocal = []; var aApplied = []; var iColumns = oSettings.aoColumns.length; var iRowspan, iColspan; if ( bIncludeHidden === undefined ) { bIncludeHidden = false; } /* Make a copy of the master layout array, but without the visible columns in it */ for ( i=0, iLen=aoSource.length ; i<iLen ; i++ ) { aoLocal[i] = aoSource[i].slice(); aoLocal[i].nTr = aoSource[i].nTr; /* Remove any columns which are currently hidden */ for ( j=iColumns-1 ; j>=0 ; j-- ) { if ( !oSettings.aoColumns[j].bVisible && !bIncludeHidden ) { aoLocal[i].splice( j, 1 ); } } /* Prep the applied array - it needs an element for each row */ aApplied.push( [] ); } for ( i=0, iLen=aoLocal.length ; i<iLen ; i++ ) { nLocalTr = aoLocal[i].nTr; /* All cells are going to be replaced, so empty out the row */ if ( nLocalTr ) { while( (n = nLocalTr.firstChild) ) { nLocalTr.removeChild( n ); } } for ( j=0, jLen=aoLocal[i].length ; j<jLen ; j++ ) { iRowspan = 1; iColspan = 1; /* Check to see if there is already a cell (row/colspan) covering our target * insert point. If there is, then there is nothing to do. */ if ( aApplied[i][j] === undefined ) { nLocalTr.appendChild( aoLocal[i][j].cell ); aApplied[i][j] = 1; /* Expand the cell to cover as many rows as needed */ while ( aoLocal[i+iRowspan] !== undefined && aoLocal[i][j].cell == aoLocal[i+iRowspan][j].cell ) { aApplied[i+iRowspan][j] = 1; iRowspan++; } /* Expand the cell to cover as many columns as needed */ while ( aoLocal[i][j+iColspan] !== undefined && aoLocal[i][j].cell == aoLocal[i][j+iColspan].cell ) { /* Must update the applied array over the rows for the columns */ for ( k=0 ; k<iRowspan ; k++ ) { aApplied[i+k][j+iColspan] = 1; } iColspan++; } /* Do the actual expansion in the DOM */ aoLocal[i][j].cell.rowSpan = iRowspan; aoLocal[i][j].cell.colSpan = iColspan; } } } } /** * Insert the required TR nodes into the table for display * @param {object} oSettings dataTables settings object * @memberof DataTable#oApi */ function _fnDraw( oSettings ) { /* Provide a pre-callback function which can be used to cancel the draw is false is returned */ var aPreDraw = _fnCallbackFire( oSettings, 'aoPreDrawCallback', 'preDraw', [oSettings] ); if ( $.inArray( false, aPreDraw ) !== -1 ) { _fnProcessingDisplay( oSettings, false ); return; } var i, iLen, n; var anRows = []; var iRowCount = 0; var iStripes = oSettings.asStripeClasses.length; var iOpenRows = oSettings.aoOpenRows.length; oSettings.bDrawing = true; /* Check and see if we have an initial draw position from state saving */ if ( oSettings.iInitDisplayStart !== undefined && oSettings.iInitDisplayStart != -1 ) { if ( oSettings.oFeatures.bServerSide ) { oSettings._iDisplayStart = oSettings.iInitDisplayStart; } else { oSettings._iDisplayStart = (oSettings.iInitDisplayStart >= oSettings.fnRecordsDisplay()) ? 0 : oSettings.iInitDisplayStart; } oSettings.iInitDisplayStart = -1; _fnCalculateEnd( oSettings ); } /* Server-side processing draw intercept */ if ( oSettings.bDeferLoading ) { oSettings.bDeferLoading = false; oSettings.iDraw++; } else if ( !oSettings.oFeatures.bServerSide ) { oSettings.iDraw++; } else if ( !oSettings.bDestroying && !_fnAjaxUpdate( oSettings ) ) { return; } if ( oSettings.aiDisplay.length !== 0 ) { var iStart = oSettings._iDisplayStart; var iEnd = oSettings._iDisplayEnd; if ( oSettings.oFeatures.bServerSide ) { iStart = 0; iEnd = oSettings.aoData.length; } for ( var j=iStart ; j<iEnd ; j++ ) { var aoData = oSettings.aoData[ oSettings.aiDisplay[j] ]; if ( aoData.nTr === null ) { _fnCreateTr( oSettings, oSettings.aiDisplay[j] ); } var nRow = aoData.nTr; /* Remove the old striping classes and then add the new one */ if ( iStripes !== 0 ) { var sStripe = oSettings.asStripeClasses[ iRowCount % iStripes ]; if ( aoData._sRowStripe != sStripe ) { $(nRow).removeClass( aoData._sRowStripe ).addClass( sStripe ); aoData._sRowStripe = sStripe; } } /* Row callback functions - might want to manipulate the row */ _fnCallbackFire( oSettings, 'aoRowCallback', null, [nRow, oSettings.aoData[ oSettings.aiDisplay[j] ]._aData, iRowCount, j] ); anRows.push( nRow ); iRowCount++; /* If there is an open row - and it is attached to this parent - attach it on redraw */ if ( iOpenRows !== 0 ) { for ( var k=0 ; k<iOpenRows ; k++ ) { if ( nRow == oSettings.aoOpenRows[k].nParent ) { anRows.push( oSettings.aoOpenRows[k].nTr ); break; } } } } } else { /* Table is empty - create a row with an empty message in it */ anRows[ 0 ] = document.createElement( 'tr' ); if ( oSettings.asStripeClasses[0] ) { anRows[ 0 ].className = oSettings.asStripeClasses[0]; } var oLang = oSettings.oLanguage; var sZero = oLang.sZeroRecords; if ( oSettings.iDraw == 1 && oSettings.sAjaxSource !== null && !oSettings.oFeatures.bServerSide ) { sZero = oLang.sLoadingRecords; } else if ( oLang.sEmptyTable && oSettings.fnRecordsTotal() === 0 ) { sZero = oLang.sEmptyTable; } var nTd = document.createElement( 'td' ); nTd.setAttribute( 'valign', "top" ); nTd.colSpan = _fnVisbleColumns( oSettings ); nTd.className = oSettings.oClasses.sRowEmpty; nTd.innerHTML = _fnInfoMacros( oSettings, sZero ); anRows[ iRowCount ].appendChild( nTd ); } /* Header and footer callbacks */ _fnCallbackFire( oSettings, 'aoHeaderCallback', 'header', [ $(oSettings.nTHead).children('tr')[0], _fnGetDataMaster( oSettings ), oSettings._iDisplayStart, oSettings.fnDisplayEnd(), oSettings.aiDisplay ] ); _fnCallbackFire( oSettings, 'aoFooterCallback', 'footer', [ $(oSettings.nTFoot).children('tr')[0], _fnGetDataMaster( oSettings ), oSettings._iDisplayStart, oSettings.fnDisplayEnd(), oSettings.aiDisplay ] ); /* * Need to remove any old row from the display - note we can't just empty the tbody using * $().html('') since this will unbind the jQuery event handlers (even although the node * still exists!) - equally we can't use innerHTML, since IE throws an exception. */ var nAddFrag = document.createDocumentFragment(), nRemoveFrag = document.createDocumentFragment(), nBodyPar, nTrs; if ( oSettings.nTBody ) { nBodyPar = oSettings.nTBody.parentNode; nRemoveFrag.appendChild( oSettings.nTBody ); /* When doing infinite scrolling, only remove child rows when sorting, filtering or start * up. When not infinite scroll, always do it. */ if ( !oSettings.oScroll.bInfinite || !oSettings._bInitComplete || oSettings.bSorted || oSettings.bFiltered ) { while( (n = oSettings.nTBody.firstChild) ) { oSettings.nTBody.removeChild( n ); } } /* Put the draw table into the dom */ for ( i=0, iLen=anRows.length ; i<iLen ; i++ ) { nAddFrag.appendChild( anRows[i] ); } oSettings.nTBody.appendChild( nAddFrag ); if ( nBodyPar !== null ) { nBodyPar.appendChild( oSettings.nTBody ); } } /* Call all required callback functions for the end of a draw */ _fnCallbackFire( oSettings, 'aoDrawCallback', 'draw', [oSettings] ); /* Draw is complete, sorting and filtering must be as well */ oSettings.bSorted = false; oSettings.bFiltered = false; oSettings.bDrawing = false; if ( oSettings.oFeatures.bServerSide ) { _fnProcessingDisplay( oSettings, false ); if ( !oSettings._bInitComplete ) { _fnInitComplete( oSettings ); } } } /** * Redraw the table - taking account of the various features which are enabled * @param {object} oSettings dataTables settings object * @memberof DataTable#oApi */ function _fnReDraw( oSettings ) { if ( oSettings.oFeatures.bSort ) { /* Sorting will refilter and draw for us */ _fnSort( oSettings, oSettings.oPreviousSearch ); } else if ( oSettings.oFeatures.bFilter ) { /* Filtering will redraw for us */ _fnFilterComplete( oSettings, oSettings.oPreviousSearch ); } else { _fnCalculateEnd( oSettings ); _fnDraw( oSettings ); } } /** * Add the options to the page HTML for the table * @param {object} oSettings dataTables settings object * @memberof DataTable#oApi */ function _fnAddOptionsHtml ( oSettings ) { /* * Create a temporary, empty, div which we can later on replace with what we have generated * we do it this way to rendering the 'options' html offline - speed :-) */ var nHolding = $('<div></div>')[0]; oSettings.nTable.parentNode.insertBefore( nHolding, oSettings.nTable ); /* * All DataTables are wrapped in a div */ oSettings.nTableWrapper = $('<div id="'+oSettings.sTableId+'_wrapper" class="'+oSettings.oClasses.sWrapper+'" role="grid"></div>')[0]; oSettings.nTableReinsertBefore = oSettings.nTable.nextSibling; /* Track where we want to insert the option */ var nInsertNode = oSettings.nTableWrapper; /* Loop over the user set positioning and place the elements as needed */ var aDom = oSettings.sDom.split(''); var nTmp, iPushFeature, cOption, nNewNode, cNext, sAttr, j; for ( var i=0 ; i<aDom.length ; i++ ) { iPushFeature = 0; cOption = aDom[i]; if ( cOption == '<' ) { /* New container div */ nNewNode = $('<div></div>')[0]; /* Check to see if we should append an id and/or a class name to the container */ cNext = aDom[i+1]; if ( cNext == "'" || cNext == '"' ) { sAttr = ""; j = 2; while ( aDom[i+j] != cNext ) { sAttr += aDom[i+j]; j++; } /* Replace jQuery UI constants */ if ( sAttr == "H" ) { sAttr = oSettings.oClasses.sJUIHeader; } else if ( sAttr == "F" ) { sAttr = oSettings.oClasses.sJUIFooter; } /* The attribute can be in the format of "#id.class", "#id" or "class" This logic * breaks the string into parts and applies them as needed */ if ( sAttr.indexOf('.') != -1 ) { var aSplit = sAttr.split('.'); nNewNode.id = aSplit[0].substr(1, aSplit[0].length-1); nNewNode.className = aSplit[1]; } else if ( sAttr.charAt(0) == "#" ) { nNewNode.id = sAttr.substr(1, sAttr.length-1); } else { nNewNode.className = sAttr; } i += j; /* Move along the position array */ } nInsertNode.appendChild( nNewNode ); nInsertNode = nNewNode; } else if ( cOption == '>' ) { /* End container div */ nInsertNode = nInsertNode.parentNode; } else if ( cOption == 'l' && oSettings.oFeatures.bPaginate && oSettings.oFeatures.bLengthChange ) { /* Length */ nTmp = _fnFeatureHtmlLength( oSettings ); iPushFeature = 1; } else if ( cOption == 'f' && oSettings.oFeatures.bFilter ) { /* Filter */ nTmp = _fnFeatureHtmlFilter( oSettings ); iPushFeature = 1; } else if ( cOption == 'r' && oSettings.oFeatures.bProcessing ) { /* pRocessing */ nTmp = _fnFeatureHtmlProcessing( oSettings ); iPushFeature = 1; } else if ( cOption == 't' ) { /* Table */ nTmp = _fnFeatureHtmlTable( oSettings ); iPushFeature = 1; } else if ( cOption == 'i' && oSettings.oFeatures.bInfo ) { /* Info */ nTmp = _fnFeatureHtmlInfo( oSettings ); iPushFeature = 1; } else if ( cOption == 'p' && oSettings.oFeatures.bPaginate ) { /* Pagination */ nTmp = _fnFeatureHtmlPaginate( oSettings ); iPushFeature = 1; } else if ( DataTable.ext.aoFeatures.length !== 0 ) { /* Plug-in features */ var aoFeatures = DataTable.ext.aoFeatures; for ( var k=0, kLen=aoFeatures.length ; k<kLen ; k++ ) { if ( cOption == aoFeatures[k].cFeature ) { nTmp = aoFeatures[k].fnInit( oSettings ); if ( nTmp ) { iPushFeature = 1; } break; } } } /* Add to the 2D features array */ if ( iPushFeature == 1 && nTmp !== null ) { if ( typeof oSettings.aanFeatures[cOption] !== 'object' ) { oSettings.aanFeatures[cOption] = []; } oSettings.aanFeatures[cOption].push( nTmp ); nInsertNode.appendChild( nTmp ); } } /* Built our DOM structure - replace the holding div with what we want */ nHolding.parentNode.replaceChild( oSettings.nTableWrapper, nHolding ); } /** * Use the DOM source to create up an array of header cells. The idea here is to * create a layout grid (array) of rows x columns, which contains a reference * to the cell that that point in the grid (regardless of col/rowspan), such that * any column / row could be removed and the new grid constructed * @param array {object} aLayout Array to store the calculated layout in * @param {node} nThead The header/footer element for the table * @memberof DataTable#oApi */ function _fnDetectHeader ( aLayout, nThead ) { var nTrs = $(nThead).children('tr'); var nTr, nCell; var i, k, l, iLen, jLen, iColShifted, iColumn, iColspan, iRowspan; var bUnique; var fnShiftCol = function ( a, i, j ) { var k = a[i]; while ( k[j] ) { j++; } return j; }; aLayout.splice( 0, aLayout.length ); /* We know how many rows there are in the layout - so prep it */ for ( i=0, iLen=nTrs.length ; i<iLen ; i++ ) { aLayout.push( [] ); } /* Calculate a layout array */ for ( i=0, iLen=nTrs.length ; i<iLen ; i++ ) { nTr = nTrs[i]; iColumn = 0; /* For every cell in the row... */ nCell = nTr.firstChild; while ( nCell ) { if ( nCell.nodeName.toUpperCase() == "TD" || nCell.nodeName.toUpperCase() == "TH" ) { /* Get the col and rowspan attributes from the DOM and sanitise them */ iColspan = nCell.getAttribute('colspan') * 1; iRowspan = nCell.getAttribute('rowspan') * 1; iColspan = (!iColspan || iColspan===0 || iColspan===1) ? 1 : iColspan; iRowspan = (!iRowspan || iRowspan===0 || iRowspan===1) ? 1 : iRowspan; /* There might be colspan cells already in this row, so shift our target * accordingly */ iColShifted = fnShiftCol( aLayout, i, iColumn ); /* Cache calculation for unique columns */ bUnique = iColspan === 1 ? true : false; /* If there is col / rowspan, copy the information into the layout grid */ for ( l=0 ; l<iColspan ; l++ ) { for ( k=0 ; k<iRowspan ; k++ ) { aLayout[i+k][iColShifted+l] = { "cell": nCell, "unique": bUnique }; aLayout[i+k].nTr = nTr; } } } nCell = nCell.nextSibling; } } } /** * Get an array of unique th elements, one for each column * @param {object} oSettings dataTables settings object * @param {node} nHeader automatically detect the layout from this node - optional * @param {array} aLayout thead/tfoot layout from _fnDetectHeader - optional * @returns array {node} aReturn list of unique th's * @memberof DataTable#oApi */ function _fnGetUniqueThs ( oSettings, nHeader, aLayout ) { var aReturn = []; if ( !aLayout ) { aLayout = oSettings.aoHeader; if ( nHeader ) { aLayout = []; _fnDetectHeader( aLayout, nHeader ); } } for ( var i=0, iLen=aLayout.length ; i<iLen ; i++ ) { for ( var j=0, jLen=aLayout[i].length ; j<jLen ; j++ ) { if ( aLayout[i][j].unique && (!aReturn[j] || !oSettings.bSortCellsTop) ) { aReturn[j] = aLayout[i][j].cell; } } } return aReturn; }