https://www.colorful.cn/assets/js/jquery.pagination.js

1/**
2 * This jQuery plugin displays pagination links inside the selected elements.
3 *
4 * @author Gabriel Birke (birke *at* d-scribe *dot* de)
5 * @version 1.1
6 * @param {int} maxentries Number of entries to paginate
7 * @param {Object} opts Several options (see README for documentation)
8 * @return {Object} jQuery Object
9 */
10jQuery.fn.pagination = function (maxentries, opts) {
11    opts = jQuery.extend({
12        items_per_page: 10,
13        num_display_entries: 10,
14        current_page: 0,
15        num_edge_entries: 0,
16        link_to: "#",
17        prev_text: "Prev",
18        next_text: "Next",
19        ellipse_text: "...",
20        prev_show_always: true,
21        next_show_always: true,
22        callback: function () { return false; }
23    }, opts || {});
24
25    return this.each(function () {
26        /**
27        * Calculate the maximum number of pages
28        */
29        function numPages() {
30            return Math.ceil(maxentries / opts.items_per_page);
31        }
32
33        /**
34        * Calculate start and end point of pagination links depending on 
35        * current_page and num_display_entries.
36        * @return {Array}
37        */
38        function getInterval() {
39            var ne_half = Math.ceil(opts.num_display_entries / 2);
40            var np = numPages();
41            var upper_limit = np - opts.num_display_entries;
42            var start = current_page > ne_half ? Math.max(Math.min(current_page - ne_half, upper_limit), 0) : 0;
43            var end = current_page > ne_half ? Math.min(current_page + ne_half, np) : Math.min(opts.num_display_entries, np);
44            return [start, end];
45        }
46
47        /**
48        * This is the event handling function for the pagination links. 
49        * @param {int} page_id The new page number
50        */
51        function pageSelected(page_id, evt) {
52            current_page = page_id;
53            drawLinks();
54            var continuePropagation = opts.callback(page_id, panel);
55            if (!continuePropagation) {
56                if (evt.stopPropagation) {
57                    evt.stopPropagation();
58                }
59                else {
60                    evt.cancelBubble = true;
61                }
62            }
63            return continuePropagation;
64        }
65
66        /**
67        * This function inserts the pagination links into the container element
68        */
69        function drawLinks() {
70            panel.empty();
71            var interval = getInterval();
72            var np = numPages();
73            // This helper function returns a handler function that calls pageSelected with the right page_id
74            var getClickHandler = function (page_id) {
75                return function (evt) { return pageSelected(page_id, evt); }
76            }
77            // Helper function for generating a single link (or a span tag if it'S the current page)
78            var appendItem = function (page_id, appendopts) {
79                page_id = page_id < 0 ? 0 : (page_id < np ? page_id : np - 1); // Normalize page id to sane value
80                appendopts = jQuery.extend({ text: page_id + 1, classes: "" }, appendopts || {});
81                if (page_id == current_page) {
82                    var lnk = $("<li class='active'><a href='javascript:;'>" + (appendopts.text) + "</a></li>");
83                }
84                else {
85                    var lnk = $("<li><a href='javascript:;'>" + (appendopts.text) + "</a></li>")
86						.bind("click", getClickHandler(page_id))
87						.attr('href', opts.link_to.replace(/__id__/, page_id));
88
89
90                }
91                if (appendopts.classes) { lnk.removeAttr('class'); lnk.addClass(appendopts.classes); }
92                panel.append(lnk);
93            }
94            // Generate "Previous"-Link
95            if (opts.prev_text && (current_page > 0 || opts.prev_show_always)) {
96                if (current_page == 0) {
97                    appendItem(current_page - 1, { text: opts.prev_text, classes: "disabled" });
98                }
99                else {
100                    appendItem(current_page - 1, { text: opts.prev_text, classes: "" });
101                }
102            }
103            // Generate starting points
104            if (interval[0] >

104 0 && opts.num_edge_entries > 0) {
105                var end = Math.min(opts.num_edge_entries, interval[0]);
106                for (var i = 0; i < end; i++) {
107                    appendItem(i);
108                }
109                if (opts.num_edge_entries < interval[0] && opts.ellipse_text) {
110                    jQuery("<li><a>" + opts.ellipse_text + "</a></li>").appendTo(panel);
111                }
112            }
113            // Generate interval links
114            for (var i = interval[0]; i < interval[1]; i++) {
115                appendItem(i);
116            }
117            // Generate ending points
118            if (interval[1] < np && opts.num_edge_entries > 0) {
119                if (np - opts.num_edge_entries > interval[1] && opts.ellipse_text) {
120                    jQuery("<li><a href='javascript:;'>" + opts.ellipse_text + "</li>").appendTo(panel);
121                }
122                var begin = Math.max(np - opts.num_edge_entries, interval[1]);
123                for (var i = begin; i < np; i++) {
124                    appendItem(i);
125                }
126
127            }
128            // Generate "Next"-Link
129            if (opts.next_text && (current_page < np - 1 || opts.next_show_always)) {
130                if (current_page == np - 1) {
131                    appendItem(current_page + 1, { text: opts.next_text, classes: "disabled" });
132                }
133                else {
134                    appendItem(current_page + 1, { text: opts.next_text, classes: "" });
135                }
136            }
137        }
138
139        // Extract current_page from options
140        var current_page = opts.current_page;
141        // Create a sane value for maxentries and items_per_page
142        maxentries = (!maxentries || maxentries < 0) ? 1 : maxentries;
143        opts.items_per_page = (!opts.items_per_page || opts.items_per_page < 0) ? 1 : opts.items_per_page;
144        // Store DOM element for easy access from all inner functions
145        var panel = jQuery(this);
146        // Attach control functions to the DOM element 
147        this.selectPage = function (page_id) { pageSelected(page_id); }
148        this.prevPage = function () {
149            if (current_page > 0) {
150                pageSelected(current_page - 1);
151                return true;
152            }
153            else {
154                return false;
155            }
156        }
157        this.nextPage = function () {
158            if (current_page < numPages() - 1) {
159                pageSelected(current_page + 1);
160                return true;
161            }
162            else {
163                return false;
164            }
165        }
166        // When all initialisation is done, draw the links
167        drawLinks();
168    });
169}
170
171