vendor: 6,059 bytes, lines 1-237
1/*! 2 Zoom 1.7.21 3 license: MIT 4 http://www.jacklmoore.com/zoom 5*/ 6(function ($) { 7 var defaults = { 8 url: false, 9 callback: false, 10 target: false, 11 duration: 120, 12 on: 'mouseover', // other options: grab, click, toggle 13 touch: true, // enables a touch fallback 14 onZoomIn: false, 15 onZoomOut: false, 16 magnify: 1 17 }; 18 19 // Core Zoom Logic, independent of event listeners. 20 $.zoom = function(target, source, img, magnify) { 21 var targetHeight, 22 targetWidth, 23 sourceHeight, 24 sourceWidth, 25 xRatio, 26 yRatio, 27 offset, 28 $target = $(target), 29 position = $target.css('position'), 30 $source = $(source); 31 32 // The parent element needs positioning so that the zoomed element can be correctly positioned within. 33 target.style.position = /(absolute|fixed)/.test(position) ? position : 'relative'; 34 target.style.overflow = 'hidden'; 35 img.style.width = img.style.height = ''; 36 37 $(img) 38 .addClass('zoomImg') 39 .css({ 40 position: 'absolute', 41 top: 0, 42 left: 0, 43 opacity: 0, 44 width: img.width * magnify, 45 height: img.height * magnify, 46 border: 'none', 47 maxWidth: 'none', 48 maxHeight: 'none' 49 }) 50 .appendTo(target); 51 52 return { 53 init: function() { 54 targetWidth = $target.outerWidth(); 55 targetHeight = $target.outerHeight(); 56 57 if (source === target) { 58 sourceWidth = targetWidth; 59 sourceHeight = targetHeight; 60 } else { 61 sourceWidth = $source.outerWidth(); 62 sourceHeight = $source.outerHeight(); 63 } 64 65 xRatio = (img.width - targetWidth) / sourceWidth; 66 yRatio = (img.height - targetHeight) / sourceHeight; 67 68 offset = $source.offset(); 69 }, 70 move: function (e) { 71 var left = (e.pageX - offset.left), 72 top = (e.pageY - offset.top); 73 74 top = Math.max(Math.min(top, sourceHeight), 0); 75 left = Math.max(Math.min(left, sourceWidth), 0); 76 77 img.style.left = (left * -xRatio) + 'px'; 78 img.style.top = (top * -yRatio) + 'px'; 79 } 80 }; 81 }; 82 83 $.fn.zoom = function (options) { 84 return this.each(function () { 85 var 86 settings = $.extend({}, defaults, options || {}), 87 //target will display the zoomed image 88 target = settings.target && $(settings.target)[0] || this, 89 //source will provide zoom location info (thumbnail) 90 source = this, 91 $source = $(source), 92 img = document.createElement('img'), 93 $img = $(img), 94 mousemove = 'mousemove.zoom', 95 clicked = false, 96 touched = false; 97 98 // If a url wasn't specified, look for an image element. 99 if (!settings.url) { 100 var srcElement = source.querySelector('img'); 101 if (srcElement) { 102 settings.url = srcElement.getAttribute('data-src') || srcElement.currentSrc || srcElement.src; 103 settings.alt = srcElement.getAttribute('data-alt') || srcElement.alt; 104 } 105 if (!settings.url) { 106 return; 107 } 108 } 109 110 $source.one('zoom.destroy', function(position, overflow){ 111 $source.off(".zoom"); 112 target.style.position = position; 113 target.style.overflow = overflow; 114 img.onload = null; 115 $img.remove(); 116 }.bind(this, target.style.position, target.style.overflow)); 117 118 img.onload = function () { 119 var zoom = $.zoom(target, source, img, settings.magnify); 120 121 function start(e) { 122 zoom.init(); 123 zoom.move(e); 124 125 // Skip the fade-in for IE8 and lower since it chokes on fading-in 126 // and changing position based on mousemovement at the same time. 127 $img.stop() 128 .fadeTo($.support.opacity ? settings.duration : 0, 1, 'function' === typeof settings.onZoomIn ? settings.onZoomIn.call(img) : false); 129 } 130 131 function stop() { 132 $img.stop() 133 .fadeTo(settings.duration, 0, 'function' === typeof settings.onZoomOut ? settings.onZoomOut.call(img) : false); 134 } 135 136 // Mouse events 137 if (settings.on === 'grab') { 138 $source 139 .on('mousedown.zoom', 140 function (e) { 141 if (e.which === 1) { 142 $(document).one('mouseup.zoom', 143 function () { 144 stop(); 145 146 $(document).off(mousemove, zoom.move); 147 } 148 ); 149 150 start(e); 151 152 $(document).on(mousemove, zoom.move); 153 154 e.preventDefault(); 155 } 156 } 157 ); 158 } else if (settings.on === 'click') { 159 $source.on('click.zoom', 160 function (e) { 161 if (clicked) { 162 // bubble the event up to the document to trigger the unbind. 163 return; 164 } else { 165 clicked = true; 166 start(e); 167 $(document).on(mousemove, zoom.move); 168 $(document).one('click.zoom', 169 function () { 170 stop(); 171 clicked = false; 172 $(document).off(mousemove, zoom.move); 173 } 174 ); 175 return false; 176 } 177 } 178 ); 179 } else if (settings.on === 'toggle') { 180 $source.on('click.zoom', 181 function (e) { 182 if (clicked) { 183 stop(); 184 } else { 185 start(e); 186 } 187 clicked = !clicked; 188 } 189 ); 190 } else if (settings.on === 'mouseover') { 191 zoom.init(); // Preemptively call init because IE7 will fire the mousemove handler before the hover handler. 192 193 $source 194 .on('mouseenter.zoom', start) 195 .on('mouseleave.zoom', stop) 196 .on(mousemove, zoom.move); 197 } 198 199 // Touch fallback 200 if (settings.touch) { 201 $source 202 .on('touchstart.zoom', function (e) { 203 e.preventDefault(); 204 if (touched) { 205 touched = false; 206 stop(); 207 } else { 208 touched = true; 209 start( e.originalEvent.touches[0] || e.originalEvent.changedTouches[0] ); 210 } 211 }) 212 .on('touchmove.zoom', function (e) { 213 e.preventDefault(); 214 zoom.move( e.originalEvent.touches[0] || e.originalEvent.changedTouches[0] ); 215 }) 216 .on('touchend.zoom', function (e) { 217 e.preventDefault(); 218 if (touched) { 219 touched = false; 220 stop(); 221 } 222 }); 223 } 224 225 if ('function' === typeof settings.callback) { 226 settings.callback.call(img); 227 } 228 }; 229 230 img.setAttribute('role', 'presentation'); 231 img.alt = settings.alt || ''; 232 img.src = settings.url; 233 }); 234 }; 235 236 $.fn.zoom.defaults = defaults; 237}(window.jQuery));
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