/**
* 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<0?0:(page_id" + appendopts.text + "");
}
else
{
lnk = $("")
.attr('href', this.opts.link_to.replace(/__id__/, page_id));
}
if(appendopts.classes){ lnk.addClass(appendopts.classes); }
if(appendopts.rel){ lnk.attr('rel', appendopts.rel); }
lnk.attr('page_id', page_id);
if (page_id != current_page) {
lnk.bind('mouseover', function() {
$(this).addClass("hover");
}).bind('mouseout', function() {
$(this).removeClass("hover");
});
}
return lnk;
},
// Generate a range of numeric links
appendRange:function(container, current_page, start, end, opts) {
var i;
for(i=start; i
");
if (this.opts.showrecord) {
var pagerstate = DN.Language.PagerBeforeState;
pagerstate = pagerstate.replace("{total}", this.opts.maxentries);
pagerstate = pagerstate.replace("{pagesize}", this.opts.items_per_page);
fragment.append(pagerstate);
}
// 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",rel:"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",rel:"next"}));
}
if (this.opts.showpage) {
var pagerState = DN.Language.PagerAfterState;
pagerState = pagerState.replace('{pageindex}', (parseInt(current_page) + 1));
pagerState = pagerState.replace('{total}', np);
fragment.append(pagerState);
}
$('a', fragment).click(eventHandler);
return fragment;
}
});
// Extend jQuery
$.fn.pagination = function(maxentries, opts){
// Initialize options with default values
this.options = opts = $.extend({
items_per_page:15, //分页大小pagesize
num_display_entries:10,//中间显示几页
current_page:0,
num_edge_entries:2, //头尾两边显示页的个数
link_to:"#",
prev_text:DN.Language.PrePage,
next_text:DN.Language.NextPage,
ellipse_text:"...",
prev_show_always:true,
next_show_always:true,
renderer:"defaultRenderer",
show_if_single_page:true,
load_first_page:true,
callback:function(){return false;}
}, opts || {});
this.options.maxentries = maxentries;
this.getPageSize = function() {
return this.options.items_per_page;
};
this.setPageSize = function (pageSize) {
if (parseInt(pageSize) != this.options.items_per_page) {
this.options.items_per_page = pageSize;
this.resetPager();
}
};
this.getRecordCount=function() {
return this.options.maxentries;
}
this.setRecordCount = function (recordCount, ctlPageIndex) {
var npage = ctlPageIndex ? ctlPageIndex - 1 : 0;
if (current_page != npage || parseInt(recordCount) != this.options.maxentries) {
current_page = npage;
this.options.maxentries = recordCount;
maxentries = recordCount;
this.resetPager();
}
}
this.setCurrentPage=function(pageIndex) {
current_page = pageIndex;
}
this.resetPager=function() {
renderer = new $.PaginationRenderers[this.options.renderer](this.options.maxentries, this.options);
var pc = new $.PaginationCalculator(this.options.maxentries, this.options);
var np = pc.numPages();
links = renderer.getLinks(current_page, paginationClickHandler);
containers.empty();
if (this.options.maxentries <= 0) {
if (this.options.emptyText) {
containers.html(this.options.emptyText);
}
}
else if (np > 1 || this.options.show_if_single_page) {
links.appendTo(containers);
}
}
this.clearPager=function() {
containers.empty();
if (this.options.emptyText) {
containers.html(this.options.emptyText);
}
}
var containers = this,
renderer, links, current_page;
/**
* This is the event handling function for the pagination links.
* @param {int} page_id The new page number
*/
function paginationClickHandler(evt) {
var links,
new_current_page = parseInt($(evt.target).attr('page_id')),
continuePropagation = selectPage(new_current_page);
//if (!continuePropagation) {
//evt.stopPropagation();
var ie = navigator.appName == "Microsoft Internet Explorer" ? true : false;
var e = evt ? evt : window.event;
if (ie) {
window.event.cancelBubble = true;
window.event.returnValue = false;
} else {
e.preventDefault();
e.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);
current_page = new_current_page;
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, 10);
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.off('setPage').on('setPage', {numPages:np}, function(evt, page_id) {
if(page_id >= 0 && page_id < evt.data.numPages) {
selectPage(page_id); return false;
}
});
containers.off('prevPage').on('prevPage', function(evt){
var current_page = $(this).data('current_page');
if (current_page > 0) {
selectPage(current_page - 1);
}
return false;
});
containers.off('nextPage').on('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;
});
containers.off('currentPage').on('currentPage', function(){
var current_page = $(this).data('current_page');
selectPage(current_page);
return false;
});*/
// When all initialisation is done, draw the links
links = renderer.getLinks(current_page, paginationClickHandler);
containers.empty();
if (this.options.maxentries <=0) {
if (this.options.emptyText) {
containers.html(this.options.emptyText);
}
}
else if(np > 1 || opts.show_if_single_page) {
links.appendTo(containers);
}
// call callback function
if(opts.load_first_page) {
opts.callback(current_page, containers);
}
return this;
}; // End of $.fn.pagination block
})(jQuery);
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