473 lines
13 KiB
JavaScript
473 lines
13 KiB
JavaScript
(function (root, factory) {
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'use strict';
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if(typeof define === 'function' && define.amd) {
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define(['jquery'], function($){
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factory($);
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});
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} else if(typeof module === 'object' && module.exports) {
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module.exports = (root.EasyZoom = factory(require('jquery')));
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} else {
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root.EasyZoom = factory(root.jQuery);
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}
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}(this, function ($) {
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'use strict';
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var zoomImgOverlapX;
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var zoomImgOverlapY;
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var ratioX;
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var ratioY;
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var pointerPositionX;
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var pointerPositionY;
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var defaults = {
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// The text to display within the notice box while loading the zoom image.
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loadingNotice: 'Loading image',
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// The text to display within the notice box if an error occurs when loading the zoom image.
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errorNotice: 'The image could not be loaded',
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// The time (in milliseconds) to display the error notice.
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errorDuration: 2500,
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// Attribute to retrieve the zoom image URL from.
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linkAttribute: 'href',
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// Prevent clicks on the zoom image link.
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preventClicks: true,
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// Callback function to execute before the flyout is displayed.
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beforeShow: $.noop,
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// Callback function to execute before the flyout is removed.
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beforeHide: $.noop,
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// Callback function to execute when the flyout is displayed.
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onShow: $.noop,
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// Callback function to execute when the flyout is removed.
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onHide: $.noop,
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// Callback function to execute when the cursor is moved while over the image.
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onMove: $.noop
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};
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/**
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* EasyZoom
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* @constructor
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* @param {Object} target
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* @param {Object} options (Optional)
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*/
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function EasyZoom(target, options) {
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this.$target = $(target);
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this.opts = $.extend({}, defaults, options, this.$target.data());
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this.isOpen === undefined && this._init();
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}
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/**
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* Init
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* @private
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*/
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EasyZoom.prototype._init = function() {
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this.$link = this.$target.find('a');
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this.$image = this.$target.find('img');
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this.$flyout = $('<div class="easyzoom-flyout" />');
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this.$notice = $('<div class="easyzoom-notice" />');
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this.$target.on({
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'mousemove.easyzoom touchmove.easyzoom': $.proxy(this._onMove, this),
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'mouseleave.easyzoom touchend.easyzoom': $.proxy(this._onLeave, this),
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'mouseenter.easyzoom touchstart.easyzoom': $.proxy(this._onEnter, this)
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});
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this.opts.preventClicks && this.$target.on('click.easyzoom', function(e) {
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e.preventDefault();
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});
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};
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/**
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* Show
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* @param {MouseEvent|TouchEvent} e
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* @param {Boolean} testMouseOver (Optional)
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*/
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EasyZoom.prototype.show = function(e, testMouseOver) {
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var self = this;
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if (this.opts.beforeShow.call(this) === false) return;
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if (!this.isReady) {
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return this._loadImage(this.$link.attr(this.opts.linkAttribute), function() {
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if (self.isMouseOver || !testMouseOver) {
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self.show(e);
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}
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});
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}
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this.$target.append(this.$flyout);
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var targetWidth = this.$target.outerWidth();
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var targetHeight = this.$target.outerHeight();
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var flyoutInnerWidth = this.$flyout.width();
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var flyoutInnerHeight = this.$flyout.height();
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var zoomImgWidth = this.$zoom.width();
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var zoomImgHeight = this.$zoom.height();
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zoomImgOverlapX = zoomImgWidth - flyoutInnerWidth;
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zoomImgOverlapY = zoomImgHeight - flyoutInnerHeight;
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// For when the zoom image is smaller than the flyout element.
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if (zoomImgOverlapX < 0) zoomImgOverlapX = 0;
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if (zoomImgOverlapY < 0) zoomImgOverlapY = 0;
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ratioX = zoomImgOverlapX / targetWidth;
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ratioY = zoomImgOverlapY / targetHeight;
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this.isOpen = true;
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this.opts.onShow.call(this);
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e && this._move(e);
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};
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/**
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* On enter
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* @private
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* @param {Event} e
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*/
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EasyZoom.prototype._onEnter = function(e) {
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var touches = e.originalEvent.touches;
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this.isMouseOver = true;
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if (!touches || touches.length == 1) {
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e.preventDefault();
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this.show(e, true);
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}
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};
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/**
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* On move
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* @private
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* @param {Event} e
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*/
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EasyZoom.prototype._onMove = function(e) {
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if (!this.isOpen) return;
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e.preventDefault();
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this._move(e);
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};
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/**
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* On leave
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* @private
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*/
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EasyZoom.prototype._onLeave = function() {
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this.isMouseOver = false;
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this.isOpen && this.hide();
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};
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/**
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* On load
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* @private
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* @param {Event} e
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*/
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EasyZoom.prototype._onLoad = function(e) {
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// IE may fire a load event even on error so test the image dimensions
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if (!e.currentTarget.width) return;
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this.isReady = true;
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this.$notice.detach();
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this.$flyout.html(this.$zoom);
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this.$target.removeClass('is-loading').addClass('is-ready');
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e.data.call && e.data();
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};
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/**
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* On error
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* @private
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*/
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EasyZoom.prototype._onError = function() {
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var self = this;
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this.$notice.text(this.opts.errorNotice);
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this.$target.removeClass('is-loading').addClass('is-error');
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this.detachNotice = setTimeout(function() {
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self.$notice.detach();
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self.detachNotice = null;
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}, this.opts.errorDuration);
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};
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/**
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* Load image
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* @private
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* @param {String} href
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* @param {Function} callback
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*/
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EasyZoom.prototype._loadImage = function(href, callback) {
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var zoom = new Image();
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this.$target
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.addClass('is-loading')
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.append(this.$notice.text(this.opts.loadingNotice));
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this.$zoom = $(zoom)
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.on('error', $.proxy(this._onError, this))
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.on('load', callback, $.proxy(this._onLoad, this));
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zoom.style.position = 'absolute';
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zoom.src = href;
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};
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/**
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* Move
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* @private
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* @param {Event} e
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*/
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EasyZoom.prototype._move = function(e) {
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if (e.type.indexOf('touch') === 0) {
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var touchlist = e.touches || e.originalEvent.touches;
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pointerPositionX = touchlist[0].pageX;
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pointerPositionY = touchlist[0].pageY;
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} else {
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pointerPositionX = e.pageX || pointerPositionX;
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pointerPositionY = e.pageY || pointerPositionY;
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}
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var targetOffset = this.$target.offset();
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var relativePositionX = pointerPositionY - targetOffset.top;
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var relativePositionY = pointerPositionX - targetOffset.left;
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var moveX = Math.ceil(relativePositionX * ratioY);
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var moveY = Math.ceil(relativePositionY * ratioX);
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// Close if outside
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if (moveY < 0 || moveX < 0 || moveY > zoomImgOverlapX || moveX > zoomImgOverlapY) {
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this.hide();
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} else {
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var top = moveX * -1;
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var left = moveY * -1;
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this.$zoom.css({
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top: top,
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left: left
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});
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this.opts.onMove.call(this, top, left);
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}
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};
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/**
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* Hide
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*/
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EasyZoom.prototype.hide = function() {
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if (!this.isOpen) return;
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if (this.opts.beforeHide.call(this) === false) return;
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this.$flyout.detach();
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this.isOpen = false;
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this.opts.onHide.call(this);
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};
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/**
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* Swap
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* @param {String} standardSrc
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* @param {String} zoomHref
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* @param {String|Array} srcset (Optional)
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*/
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EasyZoom.prototype.swap = function(standardSrc, zoomHref, srcset) {
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this.hide();
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this.isReady = false;
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this.detachNotice && clearTimeout(this.detachNotice);
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this.$notice.parent().length && this.$notice.detach();
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this.$target.removeClass('is-loading is-ready is-error');
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this.$image.attr({
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src: standardSrc,
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srcset: Array.isArray(srcset) ? srcset.join() : srcset
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});
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this.$link.attr(this.opts.linkAttribute, zoomHref);
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};
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/**
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* Teardown
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*/
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EasyZoom.prototype.teardown = function() {
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this.hide();
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this.$target
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.off('.easyzoom')
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.removeClass('is-loading is-ready is-error');
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this.detachNotice && clearTimeout(this.detachNotice);
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delete this.$link;
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delete this.$zoom;
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delete this.$image;
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delete this.$notice;
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delete this.$flyout;
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delete this.isOpen;
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delete this.isReady;
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};
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// jQuery plugin wrapper
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$.fn.easyZoom = function(options) {
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return this.each(function() {
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var api = $.data(this, 'easyZoom');
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if (!api) {
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$.data(this, 'easyZoom', new EasyZoom(this, options));
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} else if (api.isOpen === undefined) {
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api._init();
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}
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});
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};
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return EasyZoom;
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}));
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/**
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* Ready init easyZoom
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* @type type
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*/
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jQuery(document).ready(function($) {
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"use strict";
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var _zoom = $('body').hasClass('product-zoom') ? true : false;
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if (_zoom && !check_ontouchstart()) {
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var _product_zoom = $('.main-images.no-easyzoom').length ? false : true;
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/**
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* Init
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*/
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if (_product_zoom) {
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$('.easyzoom').easyZoom();
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}
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/**
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* Disabled easyZoom in ipad
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*/
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$('body').on('touchstart', '*', function() {
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var _product_zoom = $('.main-images.no-easyzoom').length ? false : true;
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if (_product_zoom && $('.easyzoom').length > 0) {
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$('.easyzoom').each(function() {
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var _easyZoom = $(this);
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if (!$(_easyZoom).hasClass('nasa-disabled-touchstart')) {
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var _easyZoom_init = $(_easyZoom).easyZoom();
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var api_easyZoom = _easyZoom_init.data('easyZoom');
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api_easyZoom.teardown();
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$(_easyZoom).addClass('nasa-disabled-touchstart');
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}
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});
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}
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});
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$('body').on('nasa_before_changed_src_main_img', function() {
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var _product_zoom = $('.main-images.no-easyzoom').length ? false : true;
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if (_product_zoom && $('.easyzoom').length) {
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if ($('.easyzoom .nasa-disabled-touchstart').length <= 0) {
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$('.easyzoom').easyZoom();
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}
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}
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});
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$('body').on('nasa_after_changed_src_main_img', function(ev, image_large, image_link) {
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var _api_easyZoom = false;
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var _product_zoom = $('.main-images.no-easyzoom').length ? false : true;
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if (_product_zoom && $('.easyzoom').length) {
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if ($('.easyzoom .nasa-disabled-touchstart').length <= 0) {
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var _api_easyZoom = $('.easyzoom').data('easyZoom');
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}
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}
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if (_api_easyZoom) {
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_api_easyZoom.swap(image_large, image_link);
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var _imgChange = $('.main-images .nasa-item-main-image-wrap[data-key="0"] img');
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if ($(_imgChange).hasClass('jetpack-lazy-image')) {
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$(_imgChange).attr('src', image_large);
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$(_imgChange)
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.removeAttr('srcset')
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.removeAttr('data-lazy-src');
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}
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}
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ev.preventDefault();
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});
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$('body').on('nasa_changed_gallery_variable_single', function() {
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reset_easy_zoom($);
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});
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$('body').on('nasa_product_gallery_remove_crazy', function() {
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reset_easy_zoom($);
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});
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$('body').on('nasa_reset_easy_zoom', function() {
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reset_easy_zoom($);
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});
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}
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});
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/**
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* Reset easyZoom
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*
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* @param {type} $
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* @returns {undefined}
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*/
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function reset_easy_zoom($) {
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var _zoom = $('body').hasClass('product-zoom') ? true : false;
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var _product_zoom = $('.main-images.no-easyzoom').length ? false : true;
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if (_zoom && _product_zoom && $('.easyzoom .nasa-disabled-touchstart').length <= 0) {
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if ($('.easyzoom').length > 0) {
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$('.easyzoom').each(function() {
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var _this = $(this);
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if (!$(_this).hasClass('nasa-loaded')) {
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if ($(_this).find('> a').attr('href') === '') {
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var _href = $(_this).find('> a').attr('data-o_href');
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if (_href) {
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$(_this).find('> a').attr('href', _href);
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}
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}
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$(_this).addClass('nasa-loaded');
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}
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});
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}
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$('.easyzoom').easyZoom();
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}
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}
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/**
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* Check device ontouchstart support
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* if (('ontouchstart' in window) || (navigator.maxTouchPoints > 0) || (navigator.msMaxTouchPoints > 0))
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*
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* @returns {Boolean}
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*/
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function check_ontouchstart() {
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return ('ontouchstart' in window) || (navigator.maxTouchPoints > 0) || (navigator.msMaxTouchPoints > 0);
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}
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