/**
* Return the settings object for a particular table
* @param {node} nTable table we are using as a dataTable
* @returns {object} Settings object - or null if not found
* @memberof DataTable#oApi
*/
function _fnSettingsFromNode ( nTable )
{
for ( var i=0 ; i<DataTable.settings.length ; i++ )
{
if ( DataTable.settings[i].nTable === nTable )
{
return DataTable.settings[i];
}
}
return null;
}
/**
* Return an array with the TR nodes for the table
* @param {object} oSettings dataTables settings object
* @returns {array} TR array
* @memberof DataTable#oApi
*/
function _fnGetTrNodes ( oSettings )
{
var aNodes = [];
var aoData = oSettings.aoData;
for ( var i=0, iLen=aoData.length ; i<iLen ; i++ )
{
if ( aoData[i].nTr !== null )
{
aNodes.push( aoData[i].nTr );
}
}
return aNodes;
}
/**
* Return an flat array with all TD nodes for the table, or row
* @param {object} oSettings dataTables settings object
* @param {int} [iIndividualRow] aoData index to get the nodes for - optional
* if not given then the return array will contain all nodes for the table
* @returns {array} TD array
* @memberof DataTable#oApi
*/
function _fnGetTdNodes ( oSettings, iIndividualRow )
{
var anReturn = [];
var iCorrector;
var anTds, nTd;
var iRow, iRows=oSettings.aoData.length,
iColumn, iColumns, oData, sNodeName, iStart=0, iEnd=iRows;
/* Allow the collection to be limited to just one row */
if ( iIndividualRow !== undefined )
{
iStart = iIndividualRow;
iEnd = iIndividualRow+1;
}
for ( iRow=iStart ; iRow<iEnd ; iRow++ )
{
oData = oSettings.aoData[iRow];
if ( oData.nTr !== null )
{
/* get the TD child nodes - taking into account text etc nodes */
anTds = [];
nTd = oData.nTr.firstChild;
while ( nTd )
{
sNodeName = nTd.nodeName.toLowerCase();
if ( sNodeName == 'td' || sNodeName == 'th' )
{
anTds.push( nTd );
}
nTd = nTd.nextSibling;
}
iCorrector = 0;
for ( iColumn=0, iColumns=oSettings.aoColumns.length ; iColumn<iColumns ; iColumn++ )
{
if ( oSettings.aoColumns[iColumn].bVisible )
{
anReturn.push( anTds[iColumn-iCorrector] );
}
else
{
anReturn.push( oData._anHidden[iColumn] );
iCorrector++;
}
}
}
}
return anReturn;
}
/**
* Log an error message
* @param {object} oSettings dataTables settings object
* @param {int} iLevel log error messages, or display them to the user
* @param {string} sMesg error message
* @memberof DataTable#oApi
*/
function _fnLog( oSettings, iLevel, sMesg )
{
var sAlert = (oSettings===null) ?
"DataTables warning: "+sMesg :
"DataTables warning (table id = '"+oSettings.sTableId+"'): "+sMesg;
if ( iLevel === 0 )
{
if ( DataTable.ext.sErrMode == 'alert' )
{
alert( sAlert );
}
else
{
throw new Error(sAlert);
}
return;
}
else if ( window.console && console.log )
{
console.log( sAlert );
}
}
/**
* See if a property is defined on one object, if so assign it to the other object
* @param {object} oRet target object
* @param {object} oSrc source object
* @param {string} sName property
* @param {string} [sMappedName] name to map too - optional, sName used if not given
* @memberof DataTable#oApi
*/
function _fnMap( oRet, oSrc, sName, sMappedName )
{
if ( sMappedName === undefined )
{
sMappedName = sName;
}
if ( oSrc[sName] !== undefined )
{
oRet[sMappedName] = oSrc[sName];
}
}
/**
* Extend objects - very similar to jQuery.extend, but deep copy objects, and shallow
* copy arrays. The reason we need to do this, is that we don't want to deep copy array
* init values (such as aaSorting) since the dev wouldn't be able to override them, but
* we do want to deep copy arrays.
* @param {object} oOut Object to extend
* @param {object} oExtender Object from which the properties will be applied to oOut
* @returns {object} oOut Reference, just for convenience - oOut === the return.
* @memberof DataTable#oApi
* @todo This doesn't take account of arrays inside the deep copied objects.
*/
function _fnExtend( oOut, oExtender )
{
var val;
for ( var prop in oExtender )
{
if ( oExtender.hasOwnProperty(prop) )
{
val = oExtender[prop];
if ( typeof oExtender[prop] === 'object' && val !== null && $.isArray(val) === false )
{
$.extend( true, oOut[prop], val );
}
else
{
oOut[prop] = val;
}
}
}
return oOut;
}
/**
* Bind an event handers to allow a click or return key to activate the callback.
* This is good for accessibility since a return on the keyboard will have the
* same effect as a click, if the element has focus.
* @param {element} n Element to bind the action to
* @param {object} oData Data object to pass to the triggered function
* @param {function} fn Callback function for when the event is triggered
* @memberof DataTable#oApi
*/
function _fnBindAction( n, oData, fn )
{
$(n)
.bind( 'click.DT', oData, function (e) {
n.blur(); // Remove focus outline for mouse users
fn(e);
} )
.bind( 'keypress.DT', oData, function (e){
if ( e.which === 13 ) {
fn(e);
} } )
.bind( 'selectstart.DT', function () {
/* Take the brutal approach to cancelling text selection */
return false;
} );
}
/**
* Register a callback function. Easily allows a callback function to be added to
* an array store of callback functions that can then all be called together.
* @param {object} oSettings dataTables settings object
* @param {string} sStore Name of the array storage for the callbacks in oSettings
* @param {function} fn Function to be called back
* @param {string} sName Identifying name for the callback (i.e. a label)
* @memberof DataTable#oApi
*/
function _fnCallbackReg( oSettings, sStore, fn, sName )
{
if ( fn )
{
oSettings[sStore].push( {
"fn": fn,
"sName": sName
} );
}
}
/**
* Fire callback functions and trigger events. Note that the loop over the callback
* array store is done backwards! Further note that you do not want to fire off triggers
* in time sensitive applications (for example cell creation) as its slow.
* @param {object} oSettings dataTables settings object
* @param {string} sStore Name of the array storage for the callbacks in oSettings
* @param {string} sTrigger Name of the jQuery custom event to trigger. If null no trigger
* is fired
* @param {array} aArgs Array of arguments to pass to the callback function / trigger
* @memberof DataTable#oApi
*/
function _fnCallbackFire( oSettings, sStore, sTrigger, aArgs )
{
var aoStore = oSettings[sStore];
var aRet =[];
for ( var i=aoStore.length-1 ; i>=0 ; i-- )
{
aRet.push( aoStore[i].fn.apply( oSettings.oInstance, aArgs ) );
}
if ( sTrigger !== null )
{
$(oSettings.oInstance).trigger(sTrigger, aArgs);
}
return aRet;
}
/**
* From some browsers (specifically IE6/7) we need special handling to work around browser
* bugs - this function is used to detect when these workarounds are needed.
* @param {object} oSettings dataTables settings object
* @memberof DataTable#oApi
*/
function _fnBrowserDetect( oSettings )
{
/* IE6/7 will oversize a width 100% element inside a scrolling element, to include the
* width of the scrollbar, while other browsers ensure the inner element is contained
* without forcing scrolling
*/
var n = $(
'<div style="position:absolute; top:0; left:0; height:1px; width:1px; overflow:hidden">'+
'<div style="position:absolute; top:1px; left:1px; width:100px; overflow:scroll;">'+
'<div id="DT_BrowserTest" style="width:100%; height:10px;"></div>'+
'</div>'+
'</div>')[0];
document.body.appendChild( n );
oSettings.oBrowser.bScrollOversize = $('#DT_BrowserTest', n)[0].offsetWidth === 100 ? true : false;
document.body.removeChild( n );
}
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