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Merge pull request #74 from yjlintw/bug-fix
Bug fix
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,235 @@ | ||
| /*! | ||
| Zoom 1.7.20 | ||
| license: MIT | ||
| http://www.jacklmoore.com/zoom | ||
| */ | ||
| (function ($) { | ||
| var defaults = { | ||
| url: false, | ||
| callback: false, | ||
| target: false, | ||
| duration: 120, | ||
| on: 'mouseover', // other options: grab, click, toggle | ||
| touch: true, // enables a touch fallback | ||
| onZoomIn: false, | ||
| onZoomOut: false, | ||
| magnify: 1 | ||
| }; | ||
|
|
||
| // Core Zoom Logic, independent of event listeners. | ||
| $.zoom = function(target, source, img, magnify) { | ||
| var targetHeight, | ||
| targetWidth, | ||
| sourceHeight, | ||
| sourceWidth, | ||
| xRatio, | ||
| yRatio, | ||
| offset, | ||
| $target = $(target), | ||
| position = $target.css('position'), | ||
| $source = $(source); | ||
|
|
||
| // The parent element needs positioning so that the zoomed element can be correctly positioned within. | ||
| target.style.position = /(absolute|fixed)/.test(position) ? position : 'relative'; | ||
| target.style.overflow = 'hidden'; | ||
| img.style.width = img.style.height = ''; | ||
|
|
||
| $(img) | ||
| .addClass('zoomImg') | ||
| .css({ | ||
| position: 'absolute', | ||
| top: 0, | ||
| left: 0, | ||
| opacity: 0, | ||
| width: img.width * magnify, | ||
| height: img.height * magnify, | ||
| border: 'none', | ||
| maxWidth: 'none', | ||
| maxHeight: 'none' | ||
| }) | ||
| .appendTo(target); | ||
|
|
||
| return { | ||
| init: function() { | ||
| targetWidth = $target.outerWidth(); | ||
| targetHeight = $target.outerHeight(); | ||
|
|
||
| if (source === target) { | ||
| sourceWidth = targetWidth; | ||
| sourceHeight = targetHeight; | ||
| } else { | ||
| sourceWidth = $source.outerWidth(); | ||
| sourceHeight = $source.outerHeight(); | ||
| } | ||
|
|
||
| xRatio = (img.width - targetWidth) / sourceWidth; | ||
| yRatio = (img.height - targetHeight) / sourceHeight; | ||
|
|
||
| offset = $source.offset(); | ||
| }, | ||
| move: function (e) { | ||
| var left = (e.pageX - offset.left), | ||
| top = (e.pageY - offset.top); | ||
|
|
||
| top = Math.max(Math.min(top, sourceHeight), 0); | ||
| left = Math.max(Math.min(left, sourceWidth), 0); | ||
|
|
||
| img.style.left = (left * -xRatio) + 'px'; | ||
| img.style.top = (top * -yRatio) + 'px'; | ||
| } | ||
| }; | ||
| }; | ||
|
|
||
| $.fn.zoom = function (options) { | ||
| return this.each(function () { | ||
| var | ||
| settings = $.extend({}, defaults, options || {}), | ||
| //target will display the zoomed image | ||
| target = settings.target && $(settings.target)[0] || this, | ||
| //source will provide zoom location info (thumbnail) | ||
| source = this, | ||
| $source = $(source), | ||
| img = document.createElement('img'), | ||
| $img = $(img), | ||
| mousemove = 'mousemove.zoom', | ||
| clicked = false, | ||
| touched = false; | ||
|
|
||
| // If a url wasn't specified, look for an image element. | ||
| if (!settings.url) { | ||
| var srcElement = source.querySelector('img'); | ||
| if (srcElement) { | ||
| settings.url = srcElement.getAttribute('data-src') || srcElement.currentSrc || srcElement.src; | ||
| } | ||
| if (!settings.url) { | ||
| return; | ||
| } | ||
| } | ||
|
|
||
| $source.one('zoom.destroy', function(position, overflow){ | ||
| $source.off(".zoom"); | ||
| target.style.position = position; | ||
| target.style.overflow = overflow; | ||
| img.onload = null; | ||
| $img.remove(); | ||
| }.bind(this, target.style.position, target.style.overflow)); | ||
|
|
||
| img.onload = function () { | ||
| var zoom = $.zoom(target, source, img, settings.magnify); | ||
|
|
||
| function start(e) { | ||
| zoom.init(); | ||
| zoom.move(e); | ||
|
|
||
| // Skip the fade-in for IE8 and lower since it chokes on fading-in | ||
| // and changing position based on mousemovement at the same time. | ||
| $img.stop() | ||
| .fadeTo($.support.opacity ? settings.duration : 0, 1, $.isFunction(settings.onZoomIn) ? settings.onZoomIn.call(img) : false); | ||
| } | ||
|
|
||
| function stop() { | ||
| $img.stop() | ||
| .fadeTo(settings.duration, 0, $.isFunction(settings.onZoomOut) ? settings.onZoomOut.call(img) : false); | ||
| } | ||
|
|
||
| // Mouse events | ||
| if (settings.on === 'grab') { | ||
| $source | ||
| .on('mousedown.zoom', | ||
| function (e) { | ||
| if (e.which === 1) { | ||
| $(document).one('mouseup.zoom', | ||
| function () { | ||
| stop(); | ||
|
|
||
| $(document).off(mousemove, zoom.move); | ||
| } | ||
| ); | ||
|
|
||
| start(e); | ||
|
|
||
| $(document).on(mousemove, zoom.move); | ||
|
|
||
| e.preventDefault(); | ||
| } | ||
| } | ||
| ); | ||
| } else if (settings.on === 'click') { | ||
| $source.on('click.zoom', | ||
| function (e) { | ||
| if (clicked) { | ||
| // bubble the event up to the document to trigger the unbind. | ||
| return; | ||
| } else { | ||
| clicked = true; | ||
| start(e); | ||
| $(document).on(mousemove, zoom.move); | ||
| $(document).one('click.zoom', | ||
| function () { | ||
| stop(); | ||
| clicked = false; | ||
| $(document).off(mousemove, zoom.move); | ||
| } | ||
| ); | ||
| return false; | ||
| } | ||
| } | ||
| ); | ||
| } else if (settings.on === 'toggle') { | ||
| $source.on('click.zoom', | ||
| function (e) { | ||
| if (clicked) { | ||
| stop(); | ||
| } else { | ||
| start(e); | ||
| } | ||
| clicked = !clicked; | ||
| } | ||
| ); | ||
| } else if (settings.on === 'mouseover') { | ||
| zoom.init(); // Preemptively call init because IE7 will fire the mousemove handler before the hover handler. | ||
|
|
||
| $source | ||
| .on('mouseenter.zoom', start) | ||
| .on('mouseleave.zoom', stop) | ||
| .on(mousemove, zoom.move); | ||
| } | ||
|
|
||
| // Touch fallback | ||
| if (settings.touch) { | ||
| $source | ||
| .on('touchstart.zoom', function (e) { | ||
| e.preventDefault(); | ||
| if (touched) { | ||
| touched = false; | ||
| stop(); | ||
| } else { | ||
| touched = true; | ||
| start( e.originalEvent.touches[0] || e.originalEvent.changedTouches[0] ); | ||
| } | ||
| }) | ||
| .on('touchmove.zoom', function (e) { | ||
| e.preventDefault(); | ||
| zoom.move( e.originalEvent.touches[0] || e.originalEvent.changedTouches[0] ); | ||
| }) | ||
| .on('touchend.zoom', function (e) { | ||
| e.preventDefault(); | ||
| if (touched) { | ||
| touched = false; | ||
| stop(); | ||
| } | ||
| }); | ||
| } | ||
|
|
||
| if ($.isFunction(settings.callback)) { | ||
| settings.callback.call(img); | ||
| } | ||
| }; | ||
|
|
||
| img.setAttribute('role', 'presentation'); | ||
| img.src = settings.url; | ||
| }); | ||
| }; | ||
|
|
||
| $.fn.zoom.defaults = defaults; | ||
| }(window.jQuery)); |
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