jquery.strongpager.js
229 lines
| 1 | /*! |
| 2 | * jQuery Strong Pager Plugin |
| 3 | * Version 2.1 |
| 4 | * |
| 5 | * Copyright (c) 2017 Chris Dillon |
| 6 | * Released under the MIT license |
| 7 | */ |
| 8 | ;(function ($) { |
| 9 | |
| 10 | var defaults = { |
| 11 | pageSize: 10, |
| 12 | currentPage: 1, |
| 13 | pagerLocation: 'after', |
| 14 | scrollTop: 1, |
| 15 | offset: 40, |
| 16 | div: '.strong-content', |
| 17 | imagesLoaded: true |
| 18 | }; |
| 19 | |
| 20 | $.fn.strongPager = function (options) { |
| 21 | |
| 22 | if (this.length === 0) { |
| 23 | return this; |
| 24 | } |
| 25 | |
| 26 | // create a namespace to be used throughout the plugin |
| 27 | var pager = {}; |
| 28 | // set a reference to our view container |
| 29 | var el = this; |
| 30 | |
| 31 | /** |
| 32 | * Initialize |
| 33 | */ |
| 34 | var init = function () { |
| 35 | var pagerVar = el.data('pager-var'); |
| 36 | var config = {}; |
| 37 | |
| 38 | if (typeof(window[pagerVar]) !== 'undefined') { |
| 39 | config = window[pagerVar].config; |
| 40 | } |
| 41 | |
| 42 | // Merge user options with the defaults |
| 43 | pager.settings = $.extend({}, defaults, config, options); |
| 44 | |
| 45 | pager.div = el.find(pager.settings.div); |
| 46 | pager.pageCounter = 0; |
| 47 | pager.scrollto = 0; |
| 48 | pager.currentPage = pager.settings.currentPage; |
| 49 | pager.visibilityInterval = 0; |
| 50 | |
| 51 | // Wait for images loaded |
| 52 | if (pager.settings.imagesLoaded) { |
| 53 | el.imagesLoaded(setup); |
| 54 | } else { |
| 55 | setup(); |
| 56 | } |
| 57 | |
| 58 | // Store reference to self in order to access public functions later |
| 59 | $(el).data('strongPager', this); |
| 60 | |
| 61 | // Set initialized flag |
| 62 | el.attr("data-state", "init"); |
| 63 | |
| 64 | }; |
| 65 | |
| 66 | /** |
| 67 | * Scroll upon navigation |
| 68 | */ |
| 69 | var scroll = function () { |
| 70 | if (pager.settings.scrollTop) { |
| 71 | $('html, body').animate({scrollTop: pager.scrollto}, 800); |
| 72 | } |
| 73 | }; |
| 74 | |
| 75 | /** |
| 76 | * Paginate |
| 77 | */ |
| 78 | var paginate = function () { |
| 79 | var pageCounter = 1; |
| 80 | |
| 81 | pager.div.wrap('<div class="simplePagerContainer"></div>'); |
| 82 | |
| 83 | pager.div.children().each(function (i) { |
| 84 | var rangeEnd = pageCounter * pager.settings.pageSize - 1; |
| 85 | if (i > rangeEnd) { |
| 86 | pageCounter++; |
| 87 | } |
| 88 | $(this).addClass('simplePagerPage' + pageCounter); |
| 89 | }); |
| 90 | |
| 91 | pager.pageCounter = pageCounter; |
| 92 | }; |
| 93 | |
| 94 | /** |
| 95 | * Calculate offset for scrolling |
| 96 | */ |
| 97 | var findOffset = function () { |
| 98 | var containerOffset; |
| 99 | |
| 100 | // WooCommerce product tabs |
| 101 | if (el.closest('.woocommerce-tabs').length) { |
| 102 | containerOffset = el.closest('.woocommerce-tabs').offset(); |
| 103 | } else { |
| 104 | containerOffset = el.find('.simplePagerContainer').offset(); |
| 105 | } |
| 106 | |
| 107 | pager.scrollto = ~~(containerOffset.top - pager.settings.offset); |
| 108 | |
| 109 | // WordPress admin bar |
| 110 | if (document.getElementById('#wpadminbar')) { |
| 111 | pager.scrollto -= 32; |
| 112 | } |
| 113 | }; |
| 114 | |
| 115 | /** |
| 116 | * Hide all and show current |
| 117 | */ |
| 118 | var switchPages = function (fade) { |
| 119 | // Hide the pages |
| 120 | pager.div.children().hide(); |
| 121 | |
| 122 | // Show the container which now has paging controls |
| 123 | el.show(); |
| 124 | |
| 125 | // Show the current page |
| 126 | var newPage = pager.div.children('.simplePagerPage' + pager.currentPage); |
| 127 | if (fade) { |
| 128 | newPage.fadeIn(); |
| 129 | } else { |
| 130 | newPage.show(); |
| 131 | } |
| 132 | }; |
| 133 | |
| 134 | /** |
| 135 | * Add navigation |
| 136 | */ |
| 137 | var addNavigation = function () { |
| 138 | var nav = '<ul class="simplePagerNav">'; |
| 139 | var cssClass; |
| 140 | |
| 141 | for (var i = 1; i <= pager.pageCounter; i++) { |
| 142 | cssClass = ''; |
| 143 | if (i === pager.currentPage) { |
| 144 | cssClass = 'currentPage '; |
| 145 | } |
| 146 | nav += '<li class="' + cssClass + 'simplePageNav' + i + '"><a rel="' + i + '" href="#">' + i + '</a></li>'; |
| 147 | } |
| 148 | nav += '</ul>'; |
| 149 | nav = '<div class="simplePagerList">' + nav + '</div>'; |
| 150 | |
| 151 | switch (pager.settings.pagerLocation) { |
| 152 | case 'before': |
| 153 | pager.div.before(nav); |
| 154 | break; |
| 155 | case 'both': |
| 156 | pager.div.before(nav); |
| 157 | pager.div.after(nav); |
| 158 | break; |
| 159 | default: |
| 160 | pager.div.after(nav); |
| 161 | } |
| 162 | }; |
| 163 | |
| 164 | /** |
| 165 | * Navigation behavior |
| 166 | */ |
| 167 | var navigationHandler = function () { |
| 168 | el.find('.simplePagerNav a').click(function (e) { |
| 169 | var $this = $(e.target); |
| 170 | var container; |
| 171 | |
| 172 | container = $this.closest('.simplePagerContainer'); |
| 173 | |
| 174 | // Get the REL attribute |
| 175 | pager.currentPage = $this.attr('rel'); |
| 176 | |
| 177 | // Remove current page highlight |
| 178 | container.find('li.currentPage').removeClass('currentPage'); |
| 179 | |
| 180 | // Add current page highlight |
| 181 | container.find('a[rel="' + pager.currentPage + '"]').parent('li').addClass('currentPage'); |
| 182 | |
| 183 | // Switch pages |
| 184 | switchPages(true); |
| 185 | |
| 186 | // Scroll up for any nav click |
| 187 | scroll(); |
| 188 | |
| 189 | return false; |
| 190 | }); |
| 191 | }; |
| 192 | |
| 193 | /** |
| 194 | * Visibility check. |
| 195 | */ |
| 196 | var visibilityCheck = function () { |
| 197 | if (el.is(':visible')) { |
| 198 | clearInterval(pager.visibilityInterval); |
| 199 | findOffset(); |
| 200 | } |
| 201 | }; |
| 202 | |
| 203 | /** |
| 204 | * Setup |
| 205 | */ |
| 206 | var setup = function () { |
| 207 | paginate(); |
| 208 | // Bail if only one page |
| 209 | if (pager.pageCounter > 1) { |
| 210 | addNavigation(); |
| 211 | navigationHandler(); |
| 212 | } |
| 213 | |
| 214 | switchPages(); |
| 215 | |
| 216 | // Set up timer to calculate offset which is dependent on visibility |
| 217 | pager.visibilityInterval = setInterval(visibilityCheck, 500); |
| 218 | }; |
| 219 | |
| 220 | /** |
| 221 | * Start it up |
| 222 | */ |
| 223 | init(); |
| 224 | |
| 225 | return this; |
| 226 | }; |
| 227 | |
| 228 | })(jQuery); |
| 229 |