/*!
* Viewer v0.3.1
* https://github.com/fengyuanchen/viewer
*
* Copyright (c) 2015 Fengyuan Chen
* Released under the MIT license
*
* Date: 2015-12-28T03:12:02.123Z
*/
(function (factory) {
if (typeof define === 'function' && define.amd) {
// AMD. Register as anonymous module.
define('viewer', ['jquery'], factory);
} else if (typeof exports === 'object') {
// Node / CommonJS
factory(require('jquery'));
} else {
// Browser globals.
factory(jQuery);
}
})(function ($) {
'use strict';
var $window = $(window);
var $document = $(document);
// Constants
var NAMESPACE = 'viewer';
var ELEMENT_VIEWER = document.createElement(NAMESPACE);
// Classes
var CLASS_TOGGLE = 'viewer-toggle';
var CLASS_FIXED = 'viewer-fixed';
var CLASS_OPEN = 'viewer-open';
var CLASS_SHOW = 'viewer-show';
var CLASS_HIDE = 'viewer-hide';
var CLASS_FADE = 'viewer-fade';
var CLASS_IN = 'viewer-in';
var CLASS_MOVE = 'viewer-move';
var CLASS_ACTIVE = 'viewer-active';
var CLASS_INVISIBLE = 'viewer-invisible';
var CLASS_TRANSITION = 'viewer-transition';
var CLASS_FULLSCREEN = 'viewer-fullscreen';
var CLASS_FULLSCREEN_EXIT = 'viewer-fullscreen-exit';
var CLASS_CLOSE = 'viewer-close';
// Selectors
var SELECTOR_IMG = 'img';
// Events
var EVENT_MOUSEDOWN = 'mousedown touchstart pointerdown MSPointerDown';
var EVENT_MOUSEMOVE = 'mousemove touchmove pointermove MSPointerMove';
var EVENT_MOUSEUP = 'mouseup touchend touchcancel pointerup pointercancel MSPointerUp MSPointerCancel';
var EVENT_WHEEL = 'wheel mousewheel DOMMouseScroll';
var EVENT_TRANSITIONEND = 'transitionend';
var EVENT_LOAD = 'load.' + NAMESPACE;
var EVENT_KEYDOWN = 'keydown.' + NAMESPACE;
var EVENT_CLICK = 'click.' + NAMESPACE;
var EVENT_RESIZE = 'resize.' + NAMESPACE;
var EVENT_BUILD = 'build.' + NAMESPACE;
var EVENT_BUILT = 'built.' + NAMESPACE;
var EVENT_SHOW = 'show.' + NAMESPACE;
var EVENT_SHOWN = 'shown.' + NAMESPACE;
var EVENT_HIDE = 'hide.' + NAMESPACE;
var EVENT_HIDDEN = 'hidden.' + NAMESPACE;
var EVENT_VIEW = 'view.' + NAMESPACE;
var EVENT_VIEWED = 'viewed.' + NAMESPACE;
// Supports
var SUPPORT_TRANSITION = typeof ELEMENT_VIEWER.style.transition !== 'undefined';
// Others
var round = Math.round;
var sqrt = Math.sqrt;
var abs = Math.abs;
var min = Math.min;
var max = Math.max;
var num = Number;
function isString(s) {
return typeof s === 'string';
}
function isNumber(n) {
return typeof n === 'number' && !isNaN(n);
}
function isUndefined(u) {
return typeof u === 'undefined';
}
function toArray(obj, offset) {
var args = [];
if (isNumber(offset)) { // It's necessary for IE8
args.push(offset);
}
return args.slice.apply(obj, args);
}
// Custom proxy to avoid jQuery's guid
function proxy(fn, context) {
var args = toArray(arguments, 2);
return function () {
return fn.apply(context, args.concat(toArray(arguments)));
};
}
function getTransform(options) {
var transforms = [];
var rotate = options.rotate;
var scaleX = options.scaleX;
var scaleY = options.scaleY;
if (isNumber(rotate)) {
transforms.push('rotate(' + rotate + 'deg)');
}
if (isNumber(scaleX) && isNumber(scaleY)) {
transforms.push('scale(' + scaleX + ',' + scaleY + ')');
}
return transforms.length ? transforms.join(' ') : 'none';
}
// Force reflow to enable CSS3 transition
function forceReflow(element) {
return element.offsetWidth;
}
// e.g.: http://domain.com/path/to/picture.jpg?size=1280×960 -> picture.jpg
function getImageName(url) {
return isString(url) ? url.replace(/^.*\//, '').replace(/[\?].*$/, '') : '';
}
function getImageSize(image, callback) {
var newImage;
// Modern browsers
if (image.naturalWidth) {
return callback(image.naturalWidth, image.naturalHeight);
}
// IE8: Don't use `new Image()` here
newImage = document.createElement('img');
newImage.onload = function () {
callback(this.width, this.height);
};
newImage.src = image.src;
}
function getTouchesCenter(touches) {
var length = touches.length;
var pageX = 0;
var pageY = 0;
if (length) {
$.each(touches, function (i, touch) {
pageX += touch.pageX;
pageY += touch.pageY;
});
pageX /= length;
pageY /= length;
}
return {
pageX: pageX,
pageY: pageY
};
}
function Viewer(element, options) {
this.$element = $(element);
this.options = $.extend({}, Viewer.DEFAULTS, $.isPlainObject(options) && options);
this.isImg = false;
this.isBuilt = false;
this.isShown = false;
this.isViewed = false;
this.isFulled = false;
this.isPlayed = false;
this.wheeling = false;
this.playing = false;
this.fading = false;
this.tooltiping = false;
this.transitioning = false;
this.action = false;
this.target = false;
this.timeout = false;
this.index = 0;
this.length = 0;
this.init();
}
Viewer.prototype = {
constructor: Viewer,
init: function () {
var options = this.options;
var $this = this.$element;
var isImg = $this.is(SELECTOR_IMG);
var $images = isImg ? $this : $this.find(SELECTOR_IMG);
var length = $images.length;
var ready = $.proxy(this.ready, this);
if (!length) {
return;
}
if ($.isFunction(options.build)) {
$this.one(EVENT_BUILD, options.build);
}
if (this.trigger(EVENT_BUILD).isDefaultPrevented()) {
return;
}
// Override `transition` option if it is not supported
if (!SUPPORT_TRANSITION) {
options.transition = false;
}
this.isImg = isImg;
this.length = length;
this.count = 0;
this.$images = $images;
this.$body = $('body');
if (options.inline) {
$this.one(EVENT_BUILT, $.proxy(function () {
this.view();
}, this));
$images.each(function () {
if (this.complete) {
ready();
} else {
$(this).one(EVENT_LOAD, ready);
}
});
} else {
$images.addClass(CLASS_TOGGLE);
$this.on(EVENT_CLICK, $.proxy(this.start, this));
}
},
ready: function () {
this.count++;
if (this.count === this.length) {
this.build();
}
},
build: function () {
var options = this.options;
var $this = this.$element;
var $parent;
var $viewer;
var $button;
var $toolbar;
if (this.isBuilt) {
return;
}
this.$parent = $parent = $this.parent();
this.$viewer = $viewer = $(Viewer.TEMPLATE);
this.$canvas = $viewer.find('.viewer-canvas');
this.$footer = $viewer.find('.viewer-footer');
this.$title = $viewer.find('.viewer-title').toggleClass(CLASS_HIDE, !options.title);
this.$toolbar = $toolbar = $viewer.find('.viewer-toolbar').toggleClass(CLASS_HIDE, !options.toolbar);
this.$navbar = $viewer.find('.viewer-navbar').toggleClass(CLASS_HIDE, !options.navbar);
this.$button = $button = $viewer.find('.viewer-button').toggleClass(CLASS_HIDE, !options.button);
this.$tooltip = $viewer.find('.viewer-tooltip');
this.$player = $viewer.find('.viewer-player');
this.$list = $viewer.find('.viewer-list');
$toolbar.find('li[class*=zoom]').toggleClass(CLASS_INVISIBLE, !options.zoomable);
$toolbar.find('li[class*=flip]').toggleClass(CLASS_INVISIBLE, !options.scalable);
if (!options.rotatable) {
$toolbar.find('li[class*=rotate]').addClass(CLASS_INVISIBLE).appendTo($toolbar);
}
if (options.inline) {
$button.addClass(CLASS_FULLSCREEN);
$viewer.css('z-index', options.zIndexInline);
if ($parent.css('position') === 'static') {
$parent.css('position', 'relative');
}
} else {
$button.addClass(CLASS_CLOSE);
$viewer.
css('z-index', options.zIndex).
addClass([CLASS_FIXED, CLASS_FADE, CLASS_HIDE].join(' '));
}
$this.after($viewer);
if (options.inline) {
this.render();
this.bind();
this.isShown = true;
}
this.isBuilt = true;
if ($.isFunction(options.built)) {
$this.one(EVENT_BUILT, options.built);
}
this.trigger(EVENT_BUILT);
},
unbuild: function () {
var options = this.options;
var $this = this.$element;
if (!this.isBuilt) {
return;
}
if (options.inline) {
$this.removeClass(CLASS_HIDE);
}
this.$viewer.remove();
},
bind: function () {
var options = this.options;
var $this = this.$element;
if ($.isFunction(options.view)) {
$this.on(EVENT_VIEW, options.view);
}
if ($.isFunction(options.viewed)) {
$this.on(EVENT_VIEWED, options.viewed);
}
this.$viewer.
on(EVENT_CLICK, $.proxy(this.click, this)).
on(EVENT_WHEEL, $.proxy(this.wheel, this));
this.$canvas.on(EVENT_MOUSEDOWN, $.proxy(this.mousedown, this));
$document.
on(EVENT_MOUSEMOVE, (this._mousemove = proxy(this.mousemove, this))).
on(EVENT_MOUSEUP, (this._mouseup = proxy(this.mouseup, this))).
on(EVENT_KEYDOWN, (this._keydown = proxy(this.keydown, this)));
$window.on(EVENT_RESIZE, (this._resize = proxy(this.resize, this)));
},
unbind: function () {
var options = this.options;
var $this = this.$element;
if ($.isFunction(options.view)) {
$this.off(EVENT_VIEW, options.view);
}
if ($.isFunction(options.viewed)) {
$this.off(EVENT_VIEWED, options.viewed);
}
this.$viewer.
off(EVENT_CLICK, this.click).
off(EVENT_WHEEL, this.wheel);
this.$canvas.off(EVENT_MOUSEDOWN, this.mousedown);
$document.
off(EVENT_MOUSEMOVE, this._mousemove).
off(EVENT_MOUSEUP, this._mouseup).
off(EVENT_KEYDOWN, this._keydown);
$window.off(EVENT_RESIZE, this._resize);
},
render: function () {
this.initContainer();
this.initViewer();
this.initList();
this.renderViewer();
},
initContainer: function () {
this.container = {
width: $window.innerWidth(),
height: $window.innerHeight()
};
},
initViewer: function () {
var options = this.options;
var $parent = this.$parent;
var viewer;
if (options.inline) {
this.parent = viewer = {
width: max($parent.width(), options.minWidth),
height: max($parent.height(), options.minHeight)
};
}
if (this.isFulled || !viewer) {
viewer = this.container;
}
this.viewer = $.extend({}, viewer);
},
renderViewer: function () {
if (this.options.inline && !this.isFulled) {
this.$viewer.css(this.viewer);
}
},
initList: function () {
var options = this.options;
var $this = this.$element;
var $list = this.$list;
var list = [];
this.$images.each(function (i) {
var src = this.src;
var alt = this.alt || getImageName(src);
var url = options.url;
if (!src) {
return;
}
if (isString(url)) {
url = this.getAttribute(url);
} else if ($.isFunction(url)) {
url = url.call(this, this);
}
list.push(
'
' +
'' +
''
);
});
$list.html(list.join('')).find(SELECTOR_IMG).one(EVENT_LOAD, {
filled: true
}, $.proxy(this.loadImage, this));
this.$items = $list.children();
if (options.transition) {
$this.one(EVENT_VIEWED, function () {
$list.addClass(CLASS_TRANSITION);
});
}
},
renderList: function (index) {
var i = index || this.index;
var width = this.$items.eq(i).width();
var outerWidth = width + 1; // 1 pixel of `margin-left` width
// Place the active item in the center of the screen
this.$list.css({
width: outerWidth * this.length,
marginLeft: (this.viewer.width - width) / 2 - outerWidth * i
});
},
resetList: function () {
this.$list.empty().removeClass(CLASS_TRANSITION).css('margin-left', 0);
},
initImage: function (callback) {
var options = this.options;
var $image = this.$image;
var viewer = this.viewer;
var footerHeight = this.$footer.height();
var viewerWidth = viewer.width;
var viewerHeight = max(viewer.height - footerHeight, footerHeight);
var oldImage = this.image || {};
getImageSize($image[0], $.proxy(function (naturalWidth, naturalHeight) {
var aspectRatio = naturalWidth / naturalHeight;
var width = viewerWidth;
var height = viewerHeight;
var initialImage;
var image;
if (viewerHeight * aspectRatio > viewerWidth) {
height = viewerWidth / aspectRatio;
} else {
width = viewerHeight * aspectRatio;
}
width = min(width * 0.9, naturalWidth);
height = min(height * 0.9, naturalHeight);
image = {
naturalWidth: naturalWidth,
naturalHeight: naturalHeight,
aspectRatio: aspectRatio,
ratio: width / naturalWidth,
width: width,
height: height,
left: (viewerWidth - width) / 2,
top: (viewerHeight - height) / 2
};
initialImage = $.extend({}, image);
if (options.rotatable) {
image.rotate = oldImage.rotate || 0;
initialImage.rotate = 0;
}
if (options.scalable) {
image.scaleX = oldImage.scaleX || 1;
image.scaleY = oldImage.scaleY || 1;
initialImage.scaleX = 1;
initialImage.scaleY = 1;
}
this.image = image;
this.initialImage = initialImage;
if ($.isFunction(callback)) {
callback();
}
}, this));
},
renderImage: function (callback) {
var image = this.image;
var $image = this.$image;
$image.css({
width: image.width,
height: image.height,
marginLeft: image.left,
marginTop: image.top,
transform: getTransform(image)
});
if ($.isFunction(callback)) {
if (this.transitioning) {
$image.one(EVENT_TRANSITIONEND, callback);
} else {
callback();
}
}
},
resetImage: function () {
this.$image.remove();
this.$image = null;
},
start: function (e) {
var target = e.target;
if ($(target).hasClass(CLASS_TOGGLE)) {
this.target = target;
this.show();
}
},
click: function (e) {
var $target = $(e.target);
var action = $target.data('action');
var image = this.image;
switch (action) {
case 'mix':
if (this.isPlayed) {
this.stop();
} else {
if (this.options.inline) {
if (this.isFulled) {
this.exit();
} else {
this.full();
}
} else {
this.hide();
}
}
break;
case 'view':
this.view($target.data('index'));
break;
case 'zoom-in':
this.zoom(0.1, true);
break;
case 'zoom-out':
this.zoom(-0.1, true);
break;
case 'one-to-one':
this.toggle();
break;
case 'reset':
this.reset();
break;
case 'prev':
this.prev();
break;
case 'play':
this.play();
break;
case 'next':
this.next();
break;
case 'rotate-left':
this.rotate(-90);
break;
case 'rotate-right':
this.rotate(90);
break;
case 'flip-horizontal':
this.scale(-image.scaleX || -1, image.scaleY || 1);
break;
case 'flip-vertical':
this.scale(image.scaleX || 1, -image.scaleY || -1);
break;
default:
if (this.isPlayed) {
this.stop();
}
}
},
load: function () {
var options = this.options;
var viewer = this.viewer;
var $image = this.$image;
if (this.timeout) {
clearTimeout(this.timeout);
this.timeout = false;
}
$image.removeClass(CLASS_INVISIBLE).css('cssText', (
'width:0;' +
'height:0;' +
'margin-left:' + viewer.width / 2 + 'px;' +
'margin-top:' + viewer.height / 2 + 'px;' +
'max-width:none!important;' +
'visibility:visible;'
));
this.initImage($.proxy(function () {
$image.
toggleClass(CLASS_TRANSITION, options.transition).
toggleClass(CLASS_MOVE, options.movable);
this.renderImage($.proxy(function () {
this.isViewed = true;
this.trigger(EVENT_VIEWED);
}, this));
}, this));
},
loadImage: function (e) {
var image = e.target;
var $image = $(image);
var $parent = $image.parent();
var parentWidth = $parent.width();
var parentHeight = $parent.height();
var filled = e.data && e.data.filled;
getImageSize(image, function (naturalWidth, naturalHeight) {
var aspectRatio = naturalWidth / naturalHeight;
var width = parentWidth;
var height = parentHeight;
if (parentHeight * aspectRatio > parentWidth) {
if (filled) {
width = parentHeight * aspectRatio;
} else {
height = parentWidth / aspectRatio;
}
} else {
if (filled) {
height = parentWidth / aspectRatio;
} else {
width = parentHeight * aspectRatio;
}
}
$image.css({
width: width,
height: height,
marginLeft: (parentWidth - width) / 2,
marginTop: (parentHeight - height) / 2
});
});
},
resize: function () {
this.initContainer();
this.initViewer();
this.renderViewer();
this.renderList();
this.initImage($.proxy(function () {
this.renderImage();
}, this));
if (this.isPlayed) {
this.$player.
find(SELECTOR_IMG).
one(EVENT_LOAD, $.proxy(this.loadImage, this)).
trigger(EVENT_LOAD);
}
},
wheel: function (event) {
var e = event.originalEvent || event;
var ratio = num(this.options.zoomRatio) || 0.1;
var delta = 1;
if (!this.isViewed) {
return;
}
event.preventDefault();
// Limit wheel speed to prevent zoom too fast
if (this.wheeling) {
return;
}
this.wheeling = true;
setTimeout($.proxy(function () {
this.wheeling = false;
}, this), 50);
if (e.deltaY) {
delta = e.deltaY > 0 ? 1 : -1;
} else if (e.wheelDelta) {
delta = -e.wheelDelta / 120;
} else if (e.detail) {
delta = e.detail > 0 ? 1 : -1;
}
this.zoom(-delta * ratio, true, event);
},
keydown: function (e) {
var options = this.options;
var which = e.which;
if (!this.isFulled || !options.keyboard) {
return;
}
switch (which) {
// (Key: Esc)
case 27:
if (this.isPlayed) {
this.stop();
} else {
if (options.inline) {
if (this.isFulled) {
this.exit();
}
} else {
this.hide();
}
}
break;
// (Key: Space)
case 32:
if (this.isPlayed) {
this.stop();
}
break;
// View previous (Key: ←)
case 37:
this.prev();
break;
// Zoom in (Key: ↑)
case 38:
// Prevent scroll on Firefox
e.preventDefault();
this.zoom(options.zoomRatio, true);
break;
// View next (Key: →)
case 39:
this.next();
break;
// Zoom out (Key: ↓)
case 40:
// Prevent scroll on Firefox
e.preventDefault();
this.zoom(-options.zoomRatio, true);
break;
// Zoom out to initial size (Key: Ctrl + 0)
case 48:
// Go to next
// Zoom in to natural size (Key: Ctrl + 1)
case 49:
if (e.ctrlKey || e.shiftKey) {
e.preventDefault();
this.toggle();
}
break;
// No default
}
},
mousedown: function (event) {
var options = this.options;
var originalEvent = event.originalEvent;
var touches = originalEvent && originalEvent.touches;
var e = event;
var action = options.movable ? 'move' : false;
var touchesLength;
if (!this.isViewed) {
return;
}
if (touches) {
touchesLength = touches.length;
if (touchesLength > 1) {
if (options.zoomable && touchesLength === 2) {
e = touches[1];
this.startX2 = e.pageX;
this.startY2 = e.pageY;
action = 'zoom';
} else {
return;
}
} else {
if (this.isSwitchable()) {
action = 'switch';
}
}
e = touches[0];
}
if (action) {
event.preventDefault();
this.action = action;
// IE8 has `event.pageX/Y`, but not `event.originalEvent.pageX/Y`
// IE10 has `event.originalEvent.pageX/Y`, but not `event.pageX/Y`
this.startX = e.pageX || originalEvent && originalEvent.pageX;
this.startY = e.pageY || originalEvent && originalEvent.pageY;
}
},
mousemove: function (event) {
var options = this.options;
var action = this.action;
var $image = this.$image;
var originalEvent = event.originalEvent;
var touches = originalEvent && originalEvent.touches;
var e = event;
var touchesLength;
if (!this.isViewed) {
return;
}
if (touches) {
touchesLength = touches.length;
if (touchesLength > 1) {
if (options.zoomable && touchesLength === 2) {
e = touches[1];
this.endX2 = e.pageX;
this.endY2 = e.pageY;
} else {
return;
}
}
e = touches[0];
}
if (action) {
event.preventDefault();
if (action === 'move' && options.transition && $image.hasClass(CLASS_TRANSITION)) {
$image.removeClass(CLASS_TRANSITION);
}
this.endX = e.pageX || originalEvent && originalEvent.pageX;
this.endY = e.pageY || originalEvent && originalEvent.pageY;
this.change(event);
}
},
mouseup: function (event) {
var action = this.action;
if (action) {
event.preventDefault();
if (action === 'move' && this.options.transition) {
this.$image.addClass(CLASS_TRANSITION);
}
this.action = false;
}
},
// Show the viewer (only available in modal mode)
show: function () {
var options = this.options;
var $viewer;
if (options.inline || this.transitioning) {
return;
}
if (!this.isBuilt) {
this.build();
}
if ($.isFunction(options.show)) {
this.$element.one(EVENT_SHOW, options.show);
}
if (this.trigger(EVENT_SHOW).isDefaultPrevented()) {
return;
}
this.$body.addClass(CLASS_OPEN);
$viewer = this.$viewer.removeClass(CLASS_HIDE);
this.$element.one(EVENT_SHOWN, $.proxy(function () {
this.view(this.target ? this.$images.index(this.target) : this.index);
this.target = false;
}, this));
if (options.transition) {
this.transitioning = true;
$viewer.addClass(CLASS_TRANSITION);
forceReflow($viewer[0]);
$viewer.one(EVENT_TRANSITIONEND, $.proxy(this.shown, this)).addClass(CLASS_IN);
} else {
$viewer.addClass(CLASS_IN);
this.shown();
}
},
// Hide the viewer (only available in modal mode)
hide: function () {
var options = this.options;
var $viewer = this.$viewer;
if (options.inline || this.transitioning || !this.isShown) {
return;
}
if ($.isFunction(options.hide)) {
this.$element.one(EVENT_HIDE, options.hide);
}
if (this.trigger(EVENT_HIDE).isDefaultPrevented()) {
return;
}
if (this.isViewed && options.transition) {
this.transitioning = true;
this.$image.one(EVENT_TRANSITIONEND, $.proxy(function () {
$viewer.one(EVENT_TRANSITIONEND, $.proxy(this.hidden, this)).removeClass(CLASS_IN);
}, this));
this.zoomTo(0, false, false, true);
} else {
$viewer.removeClass(CLASS_IN);
this.hidden();
}
},
/**
* View one of the images with image's index
*
* @param {Number} index
*/
view: function (index) {
var $title = this.$title;
var $image;
var $item;
var $img;
var url;
var alt;
index = Number(index) || 0;
if (!this.isShown || this.isPlayed || index < 0 || index >= this.length ||
this.isViewed && index === this.index) {
return;
}
if (this.trigger(EVENT_VIEW).isDefaultPrevented()) {
return;
}
$item = this.$items.eq(index);
$img = $item.find(SELECTOR_IMG);
url = $img.data('originalUrl');
alt = $img.attr('alt');
this.$image = $image = $('');
this.$items.eq(this.index).removeClass(CLASS_ACTIVE);
$item.addClass(CLASS_ACTIVE);
this.isViewed = false;
this.index = index;
this.image = null;
this.$canvas.html($image.addClass(CLASS_INVISIBLE));
if ($image[0].complete) {
this.load();
} else {
$image.one(EVENT_LOAD, $.proxy(this.load, this));
if (this.timeout) {
clearTimeout(this.timeout);
}
// Make the image visible if it fails to load within 1s
this.timeout = setTimeout($.proxy(function () {
$image.removeClass(CLASS_INVISIBLE);
this.timeout = false;
}, this), 1000);
}
$title.empty();
// Center current item
this.renderList();
// Show title when viewed
this.$element.one(EVENT_VIEWED, $.proxy(function () {
var image = this.image;
var width = image.naturalWidth;
var height = image.naturalHeight;
$title.html(alt + ' (' + width + ' × ' + height + ')');
}, this));
},
// View the previous image
prev: function () {
this.view(max(this.index - 1, 0));
},
// View the next image
next: function () {
this.view(min(this.index + 1, this.length - 1));
},
/**
* Move the image with relative offsets
*
* @param {Number} offsetX
* @param {Number} offsetY (optional)
*/
move: function (offsetX, offsetY) {
var image = this.image;
this.moveTo(
isUndefined(offsetX) ? offsetX : image.left + num(offsetX),
isUndefined(offsetY) ? offsetY : image.top + num(offsetY)
);
},
/**
* Move the image to an absolute point
*
* @param {Number} x
* @param {Number} y (optional)
*/
moveTo: function (x, y) {
var image = this.image;
var changed = false;
// If "y" is not present, its default value is "x"
if (isUndefined(y)) {
y = x;
}
x = num(x);
y = num(y);
if (this.isViewed && !this.isPlayed && this.options.movable) {
if (isNumber(x)) {
image.left = x;
changed = true;
}
if (isNumber(y)) {
image.top = y;
changed = true;
}
if (changed) {
this.renderImage();
}
}
},
/**
* Zoom the image with a relative ratio
*
* @param {Number} ratio
* @param {Boolean} hasTooltip (optional)
* @param {jQuery Event} _event (private)
*/
zoom: function (ratio, hasTooltip, _event) {
var image = this.image;
ratio = num(ratio);
if (ratio < 0) {
ratio = 1 / (1 - ratio);
} else {
ratio = 1 + ratio;
}
this.zoomTo(image.width * ratio / image.naturalWidth, hasTooltip, _event);
},
/**
* Zoom the image to an absolute ratio
*
* @param {Number} ratio
* @param {Boolean} hasTooltip (optional)
* @param {jQuery Event} _event (private)
* @param {Boolean} _zoomable (private)
*/
zoomTo: function (ratio, hasTooltip, _event, _zoomable) {
var options = this.options;
var minZoomRatio = 0.01;
var maxZoomRatio = 100;
var image = this.image;
var width = image.width;
var height = image.height;
var originalEvent;
var newWidth;
var newHeight;
var offset;
var center;
ratio = max(0, ratio);
if (isNumber(ratio) && this.isViewed && !this.isPlayed && (_zoomable || options.zoomable)) {
if (!_zoomable) {
minZoomRatio = max(minZoomRatio, options.minZoomRatio);
maxZoomRatio = min(maxZoomRatio, options.maxZoomRatio);
ratio = min(max(ratio, minZoomRatio), maxZoomRatio);
}
if (ratio > 0.95 && ratio < 1.05) {
ratio = 1;
}
newWidth = image.naturalWidth * ratio;
newHeight = image.naturalHeight * ratio;
if (_event && (originalEvent = _event.originalEvent)) {
offset = this.$viewer.offset();
center = originalEvent.touches ? getTouchesCenter(originalEvent.touches) : {
pageX: _event.pageX || originalEvent.pageX || 0,
pageY: _event.pageY || originalEvent.pageY || 0
};
// Zoom from the triggering point of the event
image.left -= (newWidth - width) * (
((center.pageX - offset.left) - image.left) / width
);
image.top -= (newHeight - height) * (
((center.pageY - offset.top) - image.top) / height
);
} else {
// Zoom from the center of the image
image.left -= (newWidth - width) / 2;
image.top -= (newHeight - height) / 2;
}
image.width = newWidth;
image.height = newHeight;
image.ratio = ratio;
this.renderImage();
if (hasTooltip) {
this.tooltip();
}
}
},
/**
* Rotate the image with a relative degree
*
* @param {Number} degree
*/
rotate: function (degree) {
this.rotateTo((this.image.rotate || 0) + num(degree));
},
/**
* Rotate the image to an absolute degree
* https://developer.mozilla.org/en-US/docs/Web/CSS/transform-function#rotate()
*
* @param {Number} degree
*/
rotateTo: function (degree) {
var image = this.image;
degree = num(degree);
if (isNumber(degree) && this.isViewed && !this.isPlayed && this.options.rotatable) {
image.rotate = degree;
this.renderImage();
}
},
/**
* Scale the image
* https://developer.mozilla.org/en-US/docs/Web/CSS/transform-function#scale()
*
* @param {Number} scaleX
* @param {Number} scaleY (optional)
*/
scale: function (scaleX, scaleY) {
var image = this.image;
var changed = false;
// If "scaleY" is not present, its default value is "scaleX"
if (isUndefined(scaleY)) {
scaleY = scaleX;
}
scaleX = num(scaleX);
scaleY = num(scaleY);
if (this.isViewed && !this.isPlayed && this.options.scalable) {
if (isNumber(scaleX)) {
image.scaleX = scaleX;
changed = true;
}
if (isNumber(scaleY)) {
image.scaleY = scaleY;
changed = true;
}
if (changed) {
this.renderImage();
}
}
},
/**
* Scale the abscissa of the image
*
* @param {Number} scaleX
*/
scaleX: function (scaleX) {
this.scale(scaleX, this.image.scaleY);
},
/**
* Scale the ordinate of the image
*
* @param {Number} scaleY
*/
scaleY: function (scaleY) {
this.scale(this.image.scaleX, scaleY);
},
// Play the images
play: function () {
var options = this.options;
var $player = this.$player;
var load = $.proxy(this.loadImage, this);
var list = [];
var total = 0;
var index = 0;
var playing;
if (!this.isShown || this.isPlayed) {
return;
}
if (options.fullscreen) {
this.fullscreen();
}
this.isPlayed = true;
$player.addClass(CLASS_SHOW);
this.$items.each(function (i) {
var $this = $(this);
var $img = $this.find(SELECTOR_IMG);
var $image = $('');
total++;
$image.addClass(CLASS_FADE).toggleClass(CLASS_TRANSITION, options.transition);
if ($this.hasClass(CLASS_ACTIVE)) {
$image.addClass(CLASS_IN);
index = i;
}
list.push($image);
$image.one(EVENT_LOAD, {
filled: false
}, load);
$player.append($image);
});
if (isNumber(options.interval) && options.interval > 0) {
playing = $.proxy(function () {
this.playing = setTimeout(function () {
list[index].removeClass(CLASS_IN);
index++;
index = index < total ? index : 0;
list[index].addClass(CLASS_IN);
playing();
}, options.interval);
}, this);
if (total > 1) {
playing();
}
}
},
// Stop play
stop: function () {
if (!this.isPlayed) {
return;
}
this.isPlayed = false;
clearTimeout(this.playing);
this.$player.removeClass(CLASS_SHOW).empty();
},
// Enter modal mode (only available in inline mode)
full: function () {
var options = this.options;
var $image = this.$image;
var $list = this.$list;
if (!this.isShown || this.isPlayed || this.isFulled || !options.inline) {
return;
}
this.isFulled = true;
this.$body.addClass(CLASS_OPEN);
this.$button.addClass(CLASS_FULLSCREEN_EXIT);
if (options.transition) {
$image.removeClass(CLASS_TRANSITION);
$list.removeClass(CLASS_TRANSITION);
}
this.$viewer.addClass(CLASS_FIXED).removeAttr('style').css('z-index', options.zIndex);
this.initContainer();
this.viewer = $.extend({}, this.container);
this.renderList();
this.initImage($.proxy(function () {
this.renderImage(function () {
if (options.transition) {
setTimeout(function () {
$image.addClass(CLASS_TRANSITION);
$list.addClass(CLASS_TRANSITION);
}, 0);
}
});
}, this));
},
// Exit modal mode (only available in inline mode)
exit: function () {
var options = this.options;
var $image = this.$image;
var $list = this.$list;
if (!this.isFulled) {
return;
}
this.isFulled = false;
this.$body.removeClass(CLASS_OPEN);
this.$button.removeClass(CLASS_FULLSCREEN_EXIT);
if (options.transition) {
$image.removeClass(CLASS_TRANSITION);
$list.removeClass(CLASS_TRANSITION);
}
this.$viewer.removeClass(CLASS_FIXED).css('z-index', options.zIndexInline);
this.viewer = $.extend({}, this.parent);
this.renderViewer();
this.renderList();
this.initImage($.proxy(function () {
this.renderImage(function () {
if (options.transition) {
setTimeout(function () {
$image.addClass(CLASS_TRANSITION);
$list.addClass(CLASS_TRANSITION);
}, 0);
}
});
}, this));
},
// Show the current ratio of the image with percentage
tooltip: function () {
var options = this.options;
var $tooltip = this.$tooltip;
var image = this.image;
var classes = [
CLASS_SHOW,
CLASS_FADE,
CLASS_TRANSITION
].join(' ');
if (!this.isViewed || this.isPlayed || !options.tooltip) {
return;
}
$tooltip.text(round(image.ratio * 100) + '%');
if (!this.tooltiping) {
if (options.transition) {
if (this.fading) {
$tooltip.trigger(EVENT_TRANSITIONEND);
}
$tooltip.addClass(classes);
forceReflow($tooltip[0]);
$tooltip.addClass(CLASS_IN);
} else {
$tooltip.addClass(CLASS_SHOW);
}
} else {
clearTimeout(this.tooltiping);
}
this.tooltiping = setTimeout($.proxy(function () {
if (options.transition) {
$tooltip.one(EVENT_TRANSITIONEND, $.proxy(function () {
$tooltip.removeClass(classes);
this.fading = false;
}, this)).removeClass(CLASS_IN);
this.fading = true;
} else {
$tooltip.removeClass(CLASS_SHOW);
}
this.tooltiping = false;
}, this), 1000);
},
// Toggle the image size between its natural size and initial size.
toggle: function () {
if (this.image.ratio === 1) {
this.zoomTo(this.initialImage.ratio, true);
} else {
this.zoomTo(1, true);
}
},
// Reset the image to its initial state.
reset: function () {
if (this.isViewed && !this.isPlayed) {
this.image = $.extend({}, this.initialImage);
this.renderImage();
}
},
// Destroy the viewer
destroy: function () {
var $this = this.$element;
if (this.options.inline) {
this.unbind();
} else {
if (this.isShown) {
this.unbind();
}
this.$images.removeClass(CLASS_TOGGLE);
$this.off(EVENT_CLICK, this.start);
}
this.unbuild();
$this.removeData(NAMESPACE);
},
// A shortcut for triggering custom events
trigger: function (type, data) {
var e = $.Event(type, data);
this.$element.trigger(e);
return e;
},
shown: function () {
var options = this.options;
this.transitioning = false;
this.isFulled = true;
this.isShown = true;
this.isVisible = true;
this.render();
this.bind();
if ($.isFunction(options.shown)) {
this.$element.one(EVENT_SHOWN, options.shown);
}
this.trigger(EVENT_SHOWN);
},
hidden: function () {
var options = this.options;
this.transitioning = false;
this.isViewed = false;
this.isFulled = false;
this.isShown = false;
this.isVisible = false;
this.unbind();
this.$body.removeClass(CLASS_OPEN);
this.$viewer.addClass(CLASS_HIDE);
this.resetList();
this.resetImage();
if ($.isFunction(options.hidden)) {
this.$element.one(EVENT_HIDDEN, options.hidden);
}
this.trigger(EVENT_HIDDEN);
},
fullscreen: function () {
var documentElement = document.documentElement;
if (this.isFulled && !document.fullscreenElement && !document.mozFullScreenElement &&
!document.webkitFullscreenElement && !document.msFullscreenElement) {
if (documentElement.requestFullscreen) {
documentElement.requestFullscreen();
} else if (documentElement.msRequestFullscreen) {
documentElement.msRequestFullscreen();
} else if (documentElement.mozRequestFullScreen) {
documentElement.mozRequestFullScreen();
} else if (documentElement.webkitRequestFullscreen) {
documentElement.webkitRequestFullscreen(Element.ALLOW_KEYBOARD_INPUT);
}
}
},
change: function (event) {
var offsetX = this.endX - this.startX;
var offsetY = this.endY - this.startY;
switch (this.action) {
// Move the current image
case 'move':
this.move(offsetX, offsetY);
break;
// Zoom the current image
case 'zoom':
this.zoom(function (x1, y1, x2, y2) {
var z1 = sqrt(x1 * x1 + y1 * y1);
var z2 = sqrt(x2 * x2 + y2 * y2);
return (z2 - z1) / z1;
}(
abs(this.startX - this.startX2),
abs(this.startY - this.startY2),
abs(this.endX - this.endX2),
abs(this.endY - this.endY2)
), false, event);
this.startX2 = this.endX2;
this.startY2 = this.endY2;
break;
case 'switch':
this.action = 'switched';
if (offsetX > 1) {
this.prev();
} else if (offsetX < -1) {
this.next();
}
break;
// No default
}
// Override
this.startX = this.endX;
this.startY = this.endY;
},
isSwitchable: function () {
var image = this.image;
var viewer = this.viewer;
return (image.left >= 0 && image.top >= 0 && image.width <= viewer.width &&
image.height <= viewer.height);
}
};
Viewer.DEFAULTS = {
// Enable inline mode
inline: false,
// Show the button on the top-right of the viewer
button: true,
// Show the navbar
navbar: true,
// Show the title
title: true,
// Show the toolbar
toolbar: true,
// Show the tooltip with image ratio (percentage) when zoom in or zoom out
tooltip: true,
// Enable to move the image
movable: true,
// Enable to zoom the image
zoomable: true,
// Enable to rotate the image
rotatable: true,
// Enable to scale the image
scalable: true,
// Enable CSS3 Transition for some special elements
transition: true,
// Enable to request fullscreen when play
fullscreen: true,
// Enable keyboard support
keyboard: true,
// Define interval of each image when playing
interval: 5000,
// Min width of the viewer in inline mode
minWidth: 200,
// Min height of the viewer in inline mode
minHeight: 100,
// Define the ratio when zoom the image by wheeling mouse
zoomRatio: 0.1,
// Define the min ratio of the image when zoom out
minZoomRatio: 0.01,
// Define the max ratio of the image when zoom in
maxZoomRatio: 100,
// Define the CSS `z-index` value of viewer in modal mode.
zIndex: 2015,
// Define the CSS `z-index` value of viewer in inline mode.
zIndexInline: 0,
// Define where to get the original image URL for viewing
// Type: String (an image attribute) or Function (should return an image URL)
url: 'src',
// Event shortcuts
build: null,
built: null,
show: null,
shown: null,
hide: null,
hidden: null,
view: null,
viewed: null
};
Viewer.TEMPLATE = (
'' +
'
' +
'' +
'
' +
'
' +
'
' +
'
'
);
// Save the other viewer
Viewer.other = $.fn.viewer;
// Register as jQuery plugin
$.fn.viewer = function (options) {
var args = toArray(arguments, 1);
var result;
this.each(function () {
var $this = $(this);
var data = $this.data(NAMESPACE);
var fn;
if (!data) {
if (/destroy|hide|exit|stop|reset/.test(options)) {
return;
}
$this.data(NAMESPACE, (data = new Viewer(this, options)));
}
if (isString(options) && $.isFunction(fn = data[options])) {
result = fn.apply(data, args);
}
});
return isUndefined(result) ? this : result;
};
$.fn.viewer.Constructor = Viewer;
$.fn.viewer.setDefaults = Viewer.setDefaults;
// No conflict
$.fn.viewer.noConflict = function () {
$.fn.viewer = Viewer.other;
return this;
};
});