Subversion-Projekte lars-tiefland.webanos.zeldi.de

/*

 * This plug-in adds another pagination option similar to `full_numbers`, except

 * it adds ellipses around the page numbers when applicable. You can set how

 * many page numbers should be displayed with the iShowPages option.

 *

 * This plug- in extends the oStdClasses object with the following properties:

 * sPageEllipsis, sPageNumber and sPageNumbers.

 *

 * It also extends the oSettings object with the following properties:

 * _iShowPages, _iShowPagesHalf, _iCurrentPage, _iTotalPages, _iFirstPage and

 * _iLastPage.

 *

 * Note that DataTables 1.10 has this ability built in. As such, this plug-ins

 * has been marked as deprecated, but may still be useful for if you are using

 * an old version of DataTables.

 *

 * @name Ellipses

 * @summary Show ellipses in the pagination control where there is a gap in numbers

 * @deprecated

 * @author [Dave Kennedy](http://daveden.wordpress.com/)

 * @example

 *     $(document).ready(function() {

 *         $('#example').dataTable({

 *             'sPaginationType': 'ellipses'

 *         });

 *     });

 */

$.extend($.fn.dataTableExt.oStdClasses, {

    'sPageEllipsis': 'paginate_ellipsis',

    'sPageNumber': 'paginate_number',

    'sPageNumbers': 'paginate_numbers'

});

$.fn.dataTableExt.oPagination.ellipses = {

    'oDefaults': {

        'iShowPages': 5

    },

    'fnClickHandler': function(e) {

        var fnCallbackDraw = e.data.fnCallbackDraw,

            oSettings = e.data.oSettings,

            sPage = e.data.sPage;

        if ($(this).is('[disabled]')) {

            return false;

        }

        oSettings.oApi._fnPageChange(oSettings, sPage);

        fnCallbackDraw(oSettings);

        return true;

    },

    // fnInit is called once for each instance of pager

    'fnInit': function(oSettings, nPager, fnCallbackDraw) {

        var oClasses = oSettings.oClasses,

            oLang = oSettings.oLanguage.oPaginate,

            that = this;

        var iShowPages = oSettings.oInit.iShowPages || this.oDefaults.iShowPages,

            iShowPagesHalf = Math.floor(iShowPages / 2);

        $.extend(oSettings, {

            _iShowPages: iShowPages,

            _iShowPagesHalf: iShowPagesHalf,

        });

        var oFirst = $('<a class="' + oClasses.sPageButton + ' ' + oClasses.sPageFirst + '">' + oLang.sFirst + '</a>'),

            oPrevious = $('<a class="' + oClasses.sPageButton + ' ' + oClasses.sPagePrevious + '">' + oLang.sPrevious + '</a>'),

            oNumbers = $('<span class="' + oClasses.sPageNumbers + '"></span>'),

            oNext = $('<a class="' + oClasses.sPageButton + ' ' + oClasses.sPageNext + '">' + oLang.sNext + '</a>'),

            oLast = $('<a class="' + oClasses.sPageButton + ' ' + oClasses.sPageLast + '">' + oLang.sLast + '</a>');

        oFirst.click({ 'fnCallbackDraw': fnCallbackDraw, 'oSettings': oSettings, 'sPage': 'first' }, that.fnClickHandler);

        oPrevious.click({ 'fnCallbackDraw': fnCallbackDraw, 'oSettings': oSettings, 'sPage': 'previous' }, that.fnClickHandler);

        oNext.click({ 'fnCallbackDraw': fnCallbackDraw, 'oSettings': oSettings, 'sPage': 'next' }, that.fnClickHandler);

        oLast.click({ 'fnCallbackDraw': fnCallbackDraw, 'oSettings': oSettings, 'sPage': 'last' }, that.fnClickHandler);

        // Draw

        $(nPager).append(oFirst, oPrevious, oNumbers, oNext, oLast);

    },

    // fnUpdate is only called once while table is rendered

    'fnUpdate': function(oSettings, fnCallbackDraw) {

        var oClasses = oSettings.oClasses,

            that = this;

        var tableWrapper = oSettings.nTableWrapper;

        // Update stateful properties

        this.fnUpdateState(oSettings);

        if (oSettings._iCurrentPage === 1) {

            $('.' + oClasses.sPageFirst, tableWrapper).attr('disabled', true);

            $('.' + oClasses.sPagePrevious, tableWrapper).attr('disabled', true);

        } else {

            $('.' + oClasses.sPageFirst, tableWrapper).removeAttr('disabled');

            $('.' + oClasses.sPagePrevious, tableWrapper).removeAttr('disabled');

        }

        if (oSettings._iTotalPages === 0 || oSettings._iCurrentPage === oSettings._iTotalPages) {

            $('.' + oClasses.sPageNext, tableWrapper).attr('disabled', true);

            $('.' + oClasses.sPageLast, tableWrapper).attr('disabled', true);

        } else {

            $('.' + oClasses.sPageNext, tableWrapper).removeAttr('disabled');

            $('.' + oClasses.sPageLast, tableWrapper).removeAttr('disabled');

        }

        var i, oNumber, oNumbers = $('.' + oClasses.sPageNumbers, tableWrapper);

        // Erase

        oNumbers.html('');

        for (i = oSettings._iFirstPage; i <= oSettings._iLastPage; i++) {

            oNumber = $('<a class="' + oClasses.sPageButton + ' ' + oClasses.sPageNumber + '">' + oSettings.fnFormatNumber(i) + '</a>');

            if (oSettings._iCurrentPage === i) {

                oNumber.attr('active', true).attr('disabled', true);

            } else {

                oNumber.click({ 'fnCallbackDraw': fnCallbackDraw, 'oSettings': oSettings, 'sPage': i - 1 }, that.fnClickHandler);

            }

            // Draw

            oNumbers.append(oNumber);

        }

        // Add ellipses

        if (1 < oSettings._iFirstPage) {

            oNumbers.prepend('<span class="' + oClasses.sPageEllipsis + '">...</span>');

        }

        if (oSettings._iLastPage < oSettings._iTotalPages) {

            oNumbers.append('<span class="' + oClasses.sPageEllipsis + '">...</span>');

        }

    },

    // fnUpdateState used to be part of fnUpdate

    // The reason for moving is so we can access current state info before fnUpdate is called

    'fnUpdateState': function(oSettings) {

        var iCurrentPage = Math.ceil((oSettings._iDisplayStart + 1) / oSettings._iDisplayLength),

            iTotalPages = Math.ceil(oSettings.fnRecordsDisplay() / oSettings._iDisplayLength),

            iFirstPage = iCurrentPage - oSettings._iShowPagesHalf,

            iLastPage = iCurrentPage + oSettings._iShowPagesHalf;

        if (iTotalPages < oSettings._iShowPages) {

            iFirstPage = 1;

            iLastPage = iTotalPages;

        } else if (iFirstPage < 1) {

            iFirstPage = 1;

            iLastPage = oSettings._iShowPages;

        } else if (iLastPage > iTotalPages) {

            iFirstPage = (iTotalPages - oSettings._iShowPages) + 1;

            iLastPage = iTotalPages;

        }

        $.extend(oSettings, {

            _iCurrentPage: iCurrentPage,

            _iTotalPages: iTotalPages,

            _iFirstPage: iFirstPage,

            _iLastPage: iLastPage

        });

    }

};