rosa-build/app/assets/javascripts/jquery.dataTables_ext.js

(function($, window, document, undefined) {
	$.extend( $.fn.DataTable.ext.oPagination, {
		"will_paginate_like": {
			/*
			 * Function: oPagination.full_numbers.fnInit
			 * Purpose:  Initialise dom elements required for pagination with a list of the pages
			 * Returns:  -
			 * Inputs:   object:oSettings - dataTables settings object
			 *           node:nPaging - the DIV which contains this pagination control
			 *           function:fnCallbackDraw - draw function which must be called on update
			 */
			"fnInit": function ( oSettings, nPaging, fnCallbackDraw ) {
				var oLang = oSettings.oLanguage.oPaginate;
				var oClasses = oSettings.oClasses;
				var fnClickHandler = function ( e ) {
					if ( oSettings.oApi._fnPageChange( oSettings, e.data.action ) )
					{
						fnCallbackDraw( oSettings );
					}
				};
	
				$(nPaging).append(
					'<a  tabindex="'+oSettings.iTabIndex+'" class="'+oClasses.sPageButton+" "+oClasses.sPagePrevious+'">'+oLang.sPrevious+'</a>'+
					'<span></span>'+
					'<a tabindex="'+oSettings.iTabIndex+'" class="'+oClasses.sPageButton+" "+oClasses.sPageNext+'">'+oLang.sNext+'</a>'
				);
				var els = $('a', nPaging);
			    var nPrev = els[0],
					nNext = els[1]
				
				oSettings.oApi._fnBindAction( nPrev,  {action: "previous"}, fnClickHandler );
				oSettings.oApi._fnBindAction( nNext,  {action: "next"},     fnClickHandler );
				
				/* ID the first elements only */
				if ( !oSettings.aanFeatures.p )
				{
					nPaging.id = oSettings.sTableId+'_paginate';
					nPrev.id =oSettings.sTableId+'_previous';
					nNext.id =oSettings.sTableId+'_next';
				}
			},
			
			/*
			 * Function: oPagination.full_numbers.fnUpdate
			 * Purpose:  Update the list of page buttons shows
			 * Returns:  -
			 * Inputs:   object:oSettings - dataTables settings object
			 *           function:fnCallbackDraw - draw function to call on page change
			 */
			"fnUpdate": function ( oSettings, fnCallbackDraw ) {
				if ( !oSettings.aanFeatures.p )
				{
					return;
				}
				
				var iPageCount = $.fn.DataTable.ext.oPagination.iFullNumbersShowPages;
				var iPageCountHalf = Math.floor(iPageCount / 2);
				var iPages = Math.ceil((oSettings.fnRecordsDisplay()) / oSettings._iDisplayLength);
				var iCurrentPage = Math.ceil(oSettings._iDisplayStart / oSettings._iDisplayLength) + 1;
				var sList = "";
				var iStartButton, iEndButton, i, iLen;
				var oClasses = oSettings.oClasses;
				var anButtons, anStatic, nPaginateList;
				var an = oSettings.aanFeatures.p;
				var fnBind = function (j) {
					oSettings.oApi._fnBindAction( this, {"page": j+iStartButton-1}, function(e) {
						/* Use the information in the element to jump to the required page */
						oSettings.oApi._fnPageChange( oSettings, e.data.page );
						fnCallbackDraw( oSettings );
						e.preventDefault();
					} );
				};
				
				/* Pages calculation */
				if (iPages < iPageCount)
				{
					iStartButton = 1;
					iEndButton = iPages;
				}
				else if (iCurrentPage <= iPageCountHalf)
				{
					iStartButton = 1;
					iEndButton = iPageCount;
				}
				else if (iCurrentPage >= (iPages - iPageCountHalf))
				{
					iStartButton = iPages - iPageCount + 1;
					iEndButton = iPages;
				}
				else
				{
					iStartButton = iCurrentPage - Math.ceil(iPageCount / 2) + 1;
					iEndButton = iStartButton + iPageCount - 1;
				}
				
				/* Build the dynamic list */
				for ( i=iStartButton ; i<=iEndButton ; i++ )
				{
					sList += (iCurrentPage !== i) ?
						'<a tabindex="'+oSettings.iTabIndex+'" class="'+oClasses.sPageButton+'">'+oSettings.fnFormatNumber(i)+'</a>' :
						'<a tabindex="'+oSettings.iTabIndex+'" class="'+oClasses.sPageButtonActive+'">'+oSettings.fnFormatNumber(i)+'</a>';
				}
				
				/* Loop over each instance of the pager */
				for ( i=0, iLen=an.length ; i<iLen ; i++ )
				{
					if ( an[i].childNodes.length === 0 )
					{
						continue;
					}
					
					/* Build up the dynamic list forst - html and listeners */
					$('span:eq(0)', an[i])
						.html( sList )
						.children('a').each( fnBind );
					
					/* Update the premanent botton's classes */
					anButtons = an[i].getElementsByTagName('a');
					anStatic = [
						anButtons[0], anButtons[anButtons.length-1]
					];
	
					$(anStatic).removeClass( oClasses.sPageButton+" "+oClasses.sPageButtonActive+" "+oClasses.sPageButtonStaticDisabled );
					$([anStatic[0]]).addClass( 
						(iCurrentPage==1) ?
							oClasses.sPageButtonStaticDisabled :
							oClasses.sPageButton
					);
					$([anStatic[1]]).addClass(
						(iPages===0 || iCurrentPage===iPages || oSettings._iDisplayLength===-1) ?
							oClasses.sPageButtonStaticDisabled :
							oClasses.sPageButton
					);
				}
			}
		}

	} );
}(jQuery, window, document, undefined));