/**
- This jQuery plugin displays pagination links inside the selected elements.
- This plugin needs at least jQuery 1.4.2 *
- @author Gabriel Birke (birke at d-scribe dot de)
- @version 2.2
- @param {int} maxentries Number of entries to paginate
- @param {Object} opts Several options (see README for documentation)
-
@return {Object} jQuery Object
/
(function($){
/*- @class Class for calculating pagination values */ $.PaginationCalculator = function(maxentries, opts) { this.maxentries = maxentries; this.opts = opts; }
$.extend($.PaginationCalculator.prototype, {
/**
* Calculate the maximum number of pages
* @method
* @returns {Number}
/
numPages:function() {
return Math.ceil(this.maxentries/this.opts.items_per_page);
},
/*
* Calculate start and end point of pagination links depending on
* current_page and num_display_entries.
* @returns {Array}
*/
getInterval:function(current_page) {
var ne_half = Math.floor(this.opts.num_display_entries/2);
var np = this.numPages();
var upper_limit = np - this.opts.num_display_entries;
var start = current_page > ne_half ? Math.max( Math.min(current_page - ne_half, upper_limit), 0 ) : 0;
var end = current_page > ne_half?Math.min(current_page+ne_half + (this.opts.num_display_entries % 2), np):Math.min(this.opts.num_display_entries, np);
return {start:start, end:end};
}
});// Initialize jQuery object container for pagination renderers
$.PaginationRenderers = {}/**
-
@class Default renderer for rendering pagination links
/
$.PaginationRenderers.defaultRenderer = function(maxentries, opts) {
this.maxentries = maxentries;
this.opts = opts;
this.pc = new $.PaginationCalculator(maxentries, opts);
}
$.extend($.PaginationRenderers.defaultRenderer.prototype, {
/*- Helper function for generating a single link (or a span tag if it's the current page)
- @param {Number} page_id The page id for the new item
- @param {Number} current_page
- @param {Object} appendopts Options for the new item: text and classes
-
@returns {jQuery} jQuery object containing the link
");
*/
createLink:function(page_id, current_page, appendopts){
var lnk, np = this.pc.numPages();
page_id = page_id appendopts = $.extend({text:page_id+1, classes:""}, appendopts||{});
if(page_id == current_page){
lnk = $("" + appendopts.text + "");
}
else
{
lnk = $("" + appendopts.text + "")
.attr('href', this.opts.link_to.replace(/__id__/,page_id));
}
if(appendopts.classes){ lnk.addClass(appendopts.classes); }
lnk.data('page_id', page_id);
return lnk;
},
// Generate a range of numeric links
appendRange:function(container, current_page, start, end, opts) {
var i;
for(i=start; i this.createLink(i, current_page, opts).appendTo(container);
}
},
getLinks:function(current_page, eventHandler) {
var begin, end,
interval = this.pc.getInterval(current_page),
np = this.pc.numPages(),
fragment = $("// Generate "Previous"-Link
if(this.opts.prev_text && (current_page > 0 || this.opts.prev_show_always)){
fragment.append(this.createLink(current_page-1, current_page, {text:this.opts.prev_text, classes:"prev"}));
}
// Generate starting points
if (interval.start > 0 && this.opts.num_edge_entries > 0)
{
end = Math.min(this.opts.num_edge_entries, interval.start);
this.appendRange(fragment, current_page, 0, end, {classes:'sp'});
if(this.opts.num_edge_entries < interval.start && this.opts.ellipse_text)
{
$(""+this.opts.ellipse_text+"").appendTo(fragment);
}
}
// Generate interval links
this.appendRange(fragment, current_page, interval.start, interval.end);
// Generate ending points
if (interval.end < np && this.opts.num_edge_entries > 0)
{
if(np-this.opts.num_edge_entries > interval.end && this.opts.ellipse_text)
{
$(""+this.opts.ellipse_text+"").appendTo(fragment);
}
begin = Math.max(np-this.opts.num_edge_entries, interval.end);
this.appendRange(fragment, current_page, begin, np, {classes:'ep'});}
// Generate "Next"-Link
if(this.opts.next_text && (current_page < np-1 || this.opts.next_show_always)){
fragment.append(this.createLink(current_page+1, current_page, {text:this.opts.next_text, classes:"next"}));
}
$('a', fragment).click(eventHandler);
return fragment;
}
});
// Extend jQuery
$.fn.pagination = function(maxentries, opts){// Initialize options with default values opts = $.extend({ items_per_page:1, num_display_entries:4, current_page:0, num_edge_entries:1, link_to:"#", prev_text:"Prev", next_text:"Next", ellipse_text:"...", prev_show_always:true, next_show_always:true, renderer:"defaultRenderer", show_if_single_page:false, load_first_page:false, callback:function(){return false;} },opts||{}); var containers = this, renderer, links, current_page; //goto$(".page-btn").one("click",function(){
var allPage = $(".allPage").text();
//console.log(allPage);
var goPage = $(".page-go input").val() - 1; //跳转页数
if(goPage > -1 && goPage < allPage){
opts.current_page = goPage;
$("#Pagination").pagination(allPage,opts);
}else {
$("#Pagination").pagination(allPage);
}
//清空用户跳转页数
$(".page-go input").val("");
});/** * This is the event handling function for the pagination links. * @param {int} page_id The new page number */ function paginationClickHandler(evt){ var links, new_current_page = $(evt.target).data('page_id'), continuePropagation = selectPage(new_current_page); if (!continuePropagation) { evt.stopPropagation(); } return continuePropagation; } /** * This is a utility function for the internal event handlers. * It sets the new current page on the pagination container objects, * generates a new HTMl fragment for the pagination links and calls * the callback function. */ function selectPage(new_current_page) { // update the link display of a all containers containers.data('current_page', new_current_page); links = renderer.getLinks(new_current_page, paginationClickHandler); containers.empty(); links.appendTo(containers); // call the callback and propagate the event if it does not return false var continuePropagation = opts.callback(new_current_page, containers); return continuePropagation; } // ----------------------------------- // Initialize containers // ----------------------------------- current_page = parseInt(opts.current_page); containers.data('current_page', current_page); // Create a sane value for maxentries and items_per_page maxentries = (!maxentries || maxentries < 0)?1:maxentries; opts.items_per_page = (!opts.items_per_page || opts.items_per_page < 0)?1:opts.items_per_page; if(!$.PaginationRenderers[opts.renderer]) { throw new ReferenceError("Pagination renderer '" + opts.renderer + "' was not found in jQuery.PaginationRenderers object."); } renderer = new $.PaginationRenderers[opts.renderer](maxentries, opts); // Attach control events to the DOM elements var pc = new $.PaginationCalculator(maxentries, opts); var np = pc.numPages(); containers.bind('setPage', {numPages:np}, function(evt, page_id) { if(page_id >= 0 && page_id < evt.data.numPages) { selectPage(page_id); return false; } }); containers.bind('prevPage', function(evt){ var current_page = $(this).data('current_page'); if (current_page > 0) { selectPage(current_page - 1); } return false; }); containers.bind('nextPage', {numPages:np}, function(evt){ var current_page = $(this).data('current_page'); if(current_page < evt.data.numPages - 1) { selectPage(current_page + 1); } return false; }); // When all initialisation is done, draw the links links = renderer.getLinks(current_page, paginationClickHandler); containers.empty(); if(np > 1 || opts.show_if_single_page) { links.appendTo(containers); } // call callback function if(opts.load_first_page) { opts.callback(current_page, containers); }} // End of $.fn.pagination block
})(jQuery);
