/**
* 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
* @param {node} [nTrIn] TR element to add to the table - optional. If not given,
* DataTables will create a row automatically
* @param {array} [anTds] Array of TD|TH elements for the row - must be given
* if nTr is.
* @memberof DataTable#oApi
*/
function _fnCreateTr ( oSettings, iRow, nTrIn, anTds )
{
var
row = oSettings.aoData[iRow],
rowData = row._aData,
nTr, nTd, oCol,
i, iLen;
if ( row.nTr === null )
{
nTr = nTrIn || 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
*/
nTr._DT_RowIndex = iRow;
/* Special parameters can be given by the data source to be used on the row */
if ( rowData.DT_RowId )
{
nTr.id = rowData.DT_RowId;
}
if ( rowData.DT_RowClass )
{
nTr.className += ' '+rowData.DT_RowClass;
}
/* Process each column */
for ( i=0, iLen=oSettings.aoColumns.length ; i<iLen ; i++ )
{
oCol = oSettings.aoColumns[i];
nTd = nTrIn ? anTds[i] : document.createElement( oCol.sCellType );
// Need to create the HTML if new, or if a rendering function is defined
if ( !nTrIn || oCol.mRender || oCol.mData !== i )
{
nTd.innerHTML = _fnGetCellData( oSettings, iRow, i, 'display' );
}
/* Add user defined class */
if ( oCol.sClass !== null )
{
nTd.className += ' '+oCol.sClass;
}
// Visibility - add or remove as required
row._anHidden[i] = oCol.bVisible ? null : nTd;
if ( oCol.bVisible && ! nTrIn )
{
nTr.appendChild( nTd );
}
else if ( ! oCol.bVisible && nTrIn )
{
nTd.parentNode.removeChild( nTd );
}
if ( oCol.fnCreatedCell )
{
oCol.fnCreatedCell.call( oSettings.oInstance,
nTd, _fnGetCellData( oSettings, iRow, i, 'display' ), rowData, iRow, i
);
}
}
row.nTr = nTr;
_fnCallbackFire( oSettings, 'aoRowCreatedCallback', null, [nTr, rowData, 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 */
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;
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;
}
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