WebRoot/static/common/pager/jquery.pager.js

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/*
* jQuery pager plugin
* Version 1.0 (11/20/2010)
*/
(function($) {

    $.fn.pager = function(options) {

        var opts = $.extend({}, $.fn.pager.defaults, options);

        return this.each(function() {

        // empty out the destination element and then render out the pager with the supplied options
            $(this).empty().append(renderpager(parseInt(options.pagenumber), parseInt(options.pagecount), options.buttonClickCallback));
            
            // specify correct cursor activity
            $('.pages li').mouseover(function() { document.body.style.cursor = "pointer"; }).mouseout(function() { document.body.style.cursor = "auto"; });
        });
    };

    // render and return the pager with the supplied options
    function renderpager(pagenumber, pagecount, buttonClickCallback) {

        // setup $pager to hold render
        var $pager = $('<ul class="pages"></ul>');

        // add in the previous and next buttons
        $pager.append(renderButton('首页', pagenumber, pagecount, buttonClickCallback)).append(renderButton('上一页', pagenumber, pagecount, buttonClickCallback));

        // pager currently only handles 10 viewable pages ( could be easily parameterized, maybe in next version ) so handle edge cases
        var startPoint = 1;
        var endPoint = 5;

        if (pagenumber >= 5) {
            startPoint = pagenumber - 2;
            endPoint = pagenumber + 2;
        }

        if (endPoint > pagecount) {
            startPoint = pagecount - 4;
            endPoint = pagecount;
        }

        if (startPoint < 1) {
            startPoint = 1;
        }

        // loop thru visible pages and render buttons
        for (var page = startPoint; page <= endPoint; page++) {

            var currentButton = $('<li class="page-number">' + (page) + '</li>');

            page == pagenumber ? currentButton.addClass('pgCurrent') : currentButton.click(function() { buttonClickCallback(this.firstChild.data); });
            currentButton.appendTo($pager);
        }

        // render in the next and 末页 buttons before returning the whole rendered control back.
        $pager.append(renderButton('下一页', pagenumber, pagecount, buttonClickCallback)).append(renderButton('末页', pagenumber, pagecount, buttonClickCallback));

        return $pager;