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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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* Note that most of the paging logic is done in
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* DataTable.ext.oPagination
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*/
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/**
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* Generate the node required for default pagination
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* @param {object} oSettings dataTables settings object
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* @returns {node} Pagination feature node
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* @memberof DataTable#oApi
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*/
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function _fnFeatureHtmlPaginate ( oSettings )
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{
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if ( oSettings.oScroll.bInfinite )
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{
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return null;
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}
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var nPaginate = document.createElement( 'div' );
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nPaginate.className = oSettings.oClasses.sPaging+oSettings.sPaginationType;
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DataTable.ext.oPagination[ oSettings.sPaginationType ].fnInit( oSettings, nPaginate,
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function( oSettings ) {
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_fnCalculateEnd( oSettings );
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_fnDraw( oSettings );
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}
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);
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/* Add a draw callback for the pagination on first instance, to update the paging display */
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if ( !oSettings.aanFeatures.p )
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{
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oSettings.aoDrawCallback.push( {
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"fn": function( oSettings ) {
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DataTable.ext.oPagination[ oSettings.sPaginationType ].fnUpdate( oSettings, function( oSettings ) {
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_fnCalculateEnd( oSettings );
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_fnDraw( oSettings );
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} );
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},
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"sName": "pagination"
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} );
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}
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return nPaginate;
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}
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/**
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* Alter the display settings to change the page
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* @param {object} oSettings dataTables settings object
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* @param {string|int} mAction Paging action to take: "first", "previous", "next" or "last"
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* or page number to jump to (integer)
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* @returns {bool} true page has changed, false - no change (no effect) eg 'first' on page 1
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* @memberof DataTable#oApi
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*/
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function _fnPageChange ( oSettings, mAction )
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{
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var iOldStart = oSettings._iDisplayStart;
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if ( typeof mAction === "number" )
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{
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oSettings._iDisplayStart = mAction * oSettings._iDisplayLength;
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if ( oSettings._iDisplayStart > oSettings.fnRecordsDisplay() )
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{
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oSettings._iDisplayStart = 0;
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}
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}
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else if ( mAction == "first" )
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{
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oSettings._iDisplayStart = 0;
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}
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else if ( mAction == "previous" )
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{
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oSettings._iDisplayStart = oSettings._iDisplayLength>=0 ?
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oSettings._iDisplayStart - oSettings._iDisplayLength :
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0;
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/* Correct for under-run */
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if ( oSettings._iDisplayStart < 0 )
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{
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oSettings._iDisplayStart = 0;
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}
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}
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else if ( mAction == "next" )
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{
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if ( oSettings._iDisplayLength >= 0 )
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{
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/* Make sure we are not over running the display array */
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if ( oSettings._iDisplayStart + oSettings._iDisplayLength < oSettings.fnRecordsDisplay() )
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{
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oSettings._iDisplayStart += oSettings._iDisplayLength;
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}
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}
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else
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{
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oSettings._iDisplayStart = 0;
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}
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}
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else if ( mAction == "last" )
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{
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if ( oSettings._iDisplayLength >= 0 )
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{
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var iPages = parseInt( (oSettings.fnRecordsDisplay()-1) / oSettings._iDisplayLength, 10 ) + 1;
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oSettings._iDisplayStart = (iPages-1) * oSettings._iDisplayLength;
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}
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else
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{
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oSettings._iDisplayStart = 0;
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}
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}
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else
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{
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_fnLog( oSettings, 0, "Unknown paging action: "+mAction );
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}
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$(oSettings.oInstance).trigger('page', oSettings);
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return iOldStart != oSettings._iDisplayStart;
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}
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