;(function($){
/*******************************************************************************************/
// jquery.pajinate.js - version 0.4
// A jQuery plugin for paginating through any number of DOM elements
//
// Copyright (c) 2010, Wes Nolte (http://wesnolte.com)
// Licensed under the MIT License (MIT-LICENSE.txt)
// http://www.opensource.org/licenses/mit-license.php
// Created: 2010-04-16 | Updated: 2010-04-26
//
/*******************************************************************************************/
$.fn.pajinate = function(options){
// Set some state information
var current_page = 'current_page';
var items_per_page = 'items_per_page';
var meta;
// Setup default option values
var defaults = {
item_container_id : '.content',
items_per_page : 10,
nav_panel_id : '.page_navigation',
nav_info_id : '.info_text',
num_page_links_to_display : 20,
start_page : 0,
wrap_around : false,
nav_label_first : 'First',
nav_label_prev : 'Prev',
nav_label_next : 'Next',
nav_label_last : 'Last',
nav_order : ["first", "prev", "num", "next", "last"],
nav_label_info : 'Showing {0}-{1} of {2} results',
show_first_last: true,
abort_on_small_lists: false,
jquery_ui: false,
jquery_ui_active: "ui-state-highlight",
jquery_ui_default: "ui-state-default",
jquery_ui_disabled: "ui-state-disabled"
};
var options = $.extend(defaults,options);
var $item_container;
var $page_container;
var $items;
var $nav_panels;
var total_page_no_links;
var jquery_ui_default_class = options.jquery_ui ? options.jquery_ui_default : '';
var jquery_ui_active_class = options.jquery_ui ? options.jquery_ui_active : '';
var jquery_ui_disabled_class = options.jquery_ui ? options.jquery_ui_disabled : '';
return this.each(function(){
$page_container = $(this);
$item_container = $(this).find(options.item_container_id);
$items = $page_container.find(options.item_container_id).children();
if (options.abort_on_small_lists && options.items_per_page >= $items.size())
return $page_container;
meta = $page_container;
// Initialize meta data
meta.data(current_page,0);
meta.data(items_per_page, options.items_per_page);
// Get the total number of items
var total_items = $item_container.children().size();
// Calculate the number of pages needed
var number_of_pages = Math.ceil(total_items/options.items_per_page);
// Construct the nav bar
var more = '...';
var less = '...';
var first = !options.show_first_last ? '' : ''+ options.nav_label_first +'';
var last = !options.show_first_last ? '' : ''+ options.nav_label_last +'';
var navigation_html = "";
for(var i = 0; i < options.nav_order.length; i++) {
switch (options.nav_order[i]) {
case "first":
navigation_html += first;
break;
case "last":
navigation_html += last;
break;
case "next":
navigation_html += ''+ options.nav_label_next +'';
break;
case "prev":
navigation_html += ''+ options.nav_label_prev +'';
break;
case "num":
navigation_html += less;
var current_link = 0;
while(number_of_pages > current_link){
navigation_html += ''+ (current_link + 1) +'';
current_link++;
}
navigation_html += more;
break;
default:
break;
}
}
// And add it to the appropriate area of the DOM
$nav_panels = $page_container.find(options.nav_panel_id);
$nav_panels.html(navigation_html).each(function(){
$(this).find('.page_link:first').addClass('first');
$(this).find('.page_link:last').addClass('last');
});
// Hide the more/less indicators
$nav_panels.children('.ellipse').hide();
// Set the active page link styling
$nav_panels.find('.previous_link').next().next().addClass('active_page '+ jquery_ui_active_class);
/* Setup Page Display */
// And hide all pages
$items.hide();
// Show the first page
$items.slice(0, meta.data(items_per_page)).show();
/* Setup Nav Menu Display */
// Page number slices
total_page_no_links = $page_container.children(options.nav_panel_id+':first').children('.page_link').size();
options.num_page_links_to_display = Math.min(options.num_page_links_to_display,total_page_no_links);
$nav_panels.children('.page_link').hide(); // Hide all the page links
// And only show the number we should be seeing
$nav_panels.each(function(){
$(this).children('.page_link').slice(0, options.num_page_links_to_display).show();
});
/* Bind the actions to their respective links */
// Event handler for 'First' link
$page_container.find('.first_link').click(function(e){
e.preventDefault();
movePageNumbersRight($(this),0);
gotopage(0);
});
// Event handler for 'Last' link
$page_container.find('.last_link').click(function(e){
e.preventDefault();
var lastPage = total_page_no_links - 1;
movePageNumbersLeft($(this),lastPage);
gotopage(lastPage);
});
// Event handler for 'Prev' link
$page_container.find('.previous_link').click(function(e){
e.preventDefault();
showPrevPage($(this));
});
// Event handler for 'Next' link
$page_container.find('.next_link').click(function(e){
e.preventDefault();
showNextPage($(this));
});
// Event handler for each 'Page' link
$page_container.find('.page_link').click(function(e){
e.preventDefault();
gotopage($(this).attr('longdesc'));
});
// Goto the required page
gotopage(parseInt(options.start_page));
toggleMoreLess();
if(!options.wrap_around)
tagNextPrev();
});
function showPrevPage(e){
new_page = parseInt(meta.data(current_page)) - 1;
// Check that we aren't on a boundary link
if($(e).siblings('.active_page').prev('.page_link').length==true){
movePageNumbersRight(e,new_page);
gotopage(new_page);
}else if(options.wrap_around){
gotopage(total_page_no_links-1);
}
}
function showNextPage(e){
new_page = parseInt(meta.data(current_page)) + 1;
// Check that we aren't on a boundary link
if($(e).siblings('.active_page').next('.page_link').length==true){
movePageNumbersLeft(e,new_page);
gotopage(new_page);
} else if (options.wrap_around) {
gotopage(0);
}
}
function gotopage(page_num){
var ipp = parseInt(meta.data(items_per_page));
var isLastPage = false;
// Find the start of the next slice
start_from = page_num * ipp;
// Find the end of the next slice
end_on = start_from + ipp;
// Hide the current page
var items = $items.hide().slice(start_from, end_on);
items.show();
// Reassign the active class
$page_container.find(options.nav_panel_id).children('.page_link[longdesc=' + page_num +']').addClass('active_page '+ jquery_ui_active_class)
.siblings('.active_page')
.removeClass('active_page ' + jquery_ui_active_class);
// Set the current page meta data
meta.data(current_page,page_num);
$page_container.find(options.nav_info_id).html(options.nav_label_info.replace("{0}",start_from+1).
replace("{1}",start_from + items.length).replace("{2}",$items.length));
// Hide the more and/or less indicators
toggleMoreLess();
// Add a class to the next or prev links if there are no more pages next or previous to the active page
tagNextPrev();
}
// Methods to shift the diplayed index of page numbers to the left or right
function movePageNumbersLeft(e, new_p){
var new_page = new_p;
var $current_active_link = $(e).siblings('.active_page');
if($current_active_link.siblings('.page_link[longdesc=' + new_page +']').css('display') == 'none'){
$nav_panels.each(function(){
$(this).children('.page_link')
.hide() // Hide all the page links
.slice(parseInt(new_page - options.num_page_links_to_display + 1) , new_page + 1)
.show();
});
}
}
function movePageNumbersRight(e, new_p){
var new_page = new_p;
var $current_active_link = $(e).siblings('.active_page');
if($current_active_link.siblings('.page_link[longdesc=' + new_page +']').css('display') == 'none'){
$nav_panels.each(function(){
$(this).children('.page_link')
.hide() // Hide all the page links
.slice( new_page , new_page + parseInt(options.num_page_links_to_display))
.show();
});
}
}
// Show or remove the ellipses that indicate that more page numbers exist in the page index than are currently shown
function toggleMoreLess(){
if(!$nav_panels.children('.page_link:visible').hasClass('last')){
$nav_panels.children('.more').show();
}else {
$nav_panels.children('.more').hide();
}
if(!$nav_panels.children('.page_link:visible').hasClass('first')){
$nav_panels.children('.less').show();
}else {
$nav_panels.children('.less').hide();
}
}
/* Add the style class ".no_more" to the first/prev and last/next links to allow custom styling */
function tagNextPrev() {
if($nav_panels.children('.last').hasClass('active_page')){
$nav_panels.children('.next_link').add('.last_link').addClass('no_more ' + jquery_ui_disabled_class);
} else {
$nav_panels.children('.next_link').add('.last_link').removeClass('no_more ' + jquery_ui_disabled_class);
}
if($nav_panels.children('.first').hasClass('active_page')){
$nav_panels.children('.previous_link').add('.first_link').addClass('no_more ' + jquery_ui_disabled_class);
} else {
$nav_panels.children('.previous_link').add('.first_link').removeClass('no_more ' + jquery_ui_disabled_class);
}
}
};
})(jQuery);