/**
 * This pagination plug-in provides pagination controls for DataTables which
 * match the style and interaction of the ExtJS library's grid component.
 *
 *  @name ExtJS style
 *  @summary Pagination in the styling of ExtJS
 *  @author [Zach Curtis](http://zachariahtimothy.wordpress.com/)
 *
 *  @example
 *    $(document).ready(function() {
 *        $('#example').dataTable( {
 *            "sPaginationType": "extStyle"
 *        } );
 *    } );
 */

$.fn.dataTableExt.oPagination.extStyle = {
	"fnInit": function (oSettings, nPaging, fnCallbackDraw) {
		nFirst = $('<span />', { 'class': 'paginate_button first' });
		nPrevious = $('<span />', { 'class': 'paginate_button previous' });
		nNext = $('<span />', { 'class': 'paginate_button next' });
		nLast = $('<span />', { 'class': 'paginate_button last' });
		nPageTxt = $("<span />", { text: 'Page' });
		nPageNumBox = $('<input />', { type: 'text', val: 1, 'class': 'pageinate_input_box' });
		nPageOf = $('<span />', { text: 'of' });
		nTotalPages = $('<span />', { text: parseInt(oSettings.aoData.length / oSettings._iDisplayLength, 10) });
 
		$(nPaging)
			.append(nFirst)
			.append(nPrevious)
			.append(nPageTxt)
			.append(nPageNumBox)
			.append(nPageOf)
			.append(nTotalPages)
			.append(nNext)
			.append(nLast);
 
		nFirst.click(function () {
			oSettings.oApi._fnPageChange(oSettings, "first");
			fnCallbackDraw(oSettings);
			nPageNumBox.val(parseInt(oSettings._iDisplayEnd / oSettings._iDisplayLength, 10));
		}).bind('selectstart', function () { return false; });
 
		nPrevious.click(function () {
			oSettings.oApi._fnPageChange(oSettings, "previous");
			fnCallbackDraw(oSettings);
			nPageNumBox.val(parseInt(oSettings._iDisplayEnd / oSettings._iDisplayLength, 10));
		}).bind('selectstart', function () { return false; });
 
		nNext.click(function () {
			oSettings.oApi._fnPageChange(oSettings, "next");
			fnCallbackDraw(oSettings);
		   nPageNumBox.val(parseInt(oSettings._iDisplayEnd / oSettings._iDisplayLength, 10));
		}).bind('selectstart', function () { return false; });
 
		nLast.click(function () {
			oSettings.oApi._fnPageChange(oSettings, "last");
			fnCallbackDraw(oSettings);
			nPageNumBox.val(parseInt(oSettings._iDisplayEnd / oSettings._iDisplayLength,10 ));
		}).bind('selectstart', function () { return false; });
 
		nPageNumBox.focus(function () {
			$(this).attr("style", "border-color: #D0B39A");
		}).blur(function () {
			$(this).attr("style", "border-color: #C9C9C9");
		}).change(function () {
			var pageValue = parseInt($(this).val(), 10);
			if ((pageValue !== NaN) && pageValue > 0 && pageValue < oSettings.aoData.length) {
				oSettings._iDisplayStart = $(this).val();
				fnCallbackDraw(oSettings);
			}
		});
 
	},
 
 
	"fnUpdate": function (oSettings, fnCallbackDraw) {
		if (!oSettings.aanFeatures.p) {
			return;
		}
 
		/* Loop over each instance of the pager */
		var an = oSettings.aanFeatures.p;
		for (var i = 0, iLen = an.length; i < iLen; i++) {
			//var buttons = an[i].getElementsByTagName('span');
			var buttons = $(an[i]).find('span.paginate_button');
			if (oSettings._iDisplayStart === 0) {
				buttons.eq(0).attr("class", "paginate_disabled_first paginate_button");
				buttons.eq(1).attr("class", "paginate_disabled_previous paginate_button");
			}
			else {
				buttons.eq(0).attr("class", "paginate_enabled_first paginate_button");
				buttons.eq(1).attr("class", "paginate_enabled_previous paginate_button");
			}
 
			if (oSettings.fnDisplayEnd() == oSettings.fnRecordsDisplay()) {
				buttons.eq(2).attr("class", "paginate_disabled_next paginate_button");
				buttons.eq(3).attr("class", "paginate_disabled_last paginate_button");
			}
			else {
				buttons.eq(2).attr("class", "paginate_enabled_next paginate_button");
				buttons.eq(3).attr("class", "paginate_enabled_last paginate_button");
			}
		}
	}
};