/*! medium-zoom 1.0.5 | MIT License | https://github.com/francoischalifour/medium-zoom */
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(function(global, factory) {
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typeof exports === "object" && typeof module !== "undefined" ? module.exports = factory() : typeof define === "function" && define.amd ? define(factory) : (global = global || self,
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global.mediumZoom = factory());
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})(this, function() {
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"use strict";
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var _extends = Object.assign || function(target) {
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for (var i = 1; i < arguments.length; i++) {
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var source = arguments[i];
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for (var key in source) {
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if (Object.prototype.hasOwnProperty.call(source, key)) {
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target[key] = source[key];
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}
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}
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}
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return target;
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};
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var isSupported = function isSupported(node) {
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return node.tagName === "IMG";
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};
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var isNodeList = function isNodeList(selector) {
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return NodeList.prototype.isPrototypeOf(selector);
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};
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var isNode = function isNode(selector) {
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return selector && selector.nodeType === 1;
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};
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var isSvg = function isSvg(image) {
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var source = image.currentSrc || image.src;
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return source.substr(-4).toLowerCase() === ".svg";
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};
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var getImagesFromSelector = function getImagesFromSelector(selector) {
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try {
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if (Array.isArray(selector)) {
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return selector.filter(isSupported);
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}
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if (isNodeList(selector)) {
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return [].slice.call(selector).filter(isSupported);
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}
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if (isNode(selector)) {
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return [ selector ].filter(isSupported);
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}
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if (typeof selector === "string") {
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return [].slice.call(document.querySelectorAll(selector)).filter(isSupported);
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}
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return [];
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} catch (err) {
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throw new TypeError("The provided selector is invalid.\n" + "Expects a CSS selector, a Node element, a NodeList or an array.\n" + "See: https://github.com/francoischalifour/medium-zoom");
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}
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};
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var createOverlay = function createOverlay(background) {
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var overlay = document.createElement("div");
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overlay.classList.add("medium-zoom-overlay");
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overlay.style.background = background;
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return overlay;
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};
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var cloneTarget = function cloneTarget(template) {
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var _template$getBounding = template.getBoundingClientRect(), top = _template$getBounding.top, left = _template$getBounding.left, width = _template$getBounding.width, height = _template$getBounding.height;
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var clone = template.cloneNode();
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var scrollTop = window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop || 0;
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var scrollLeft = window.pageXOffset || document.documentElement.scrollLeft || document.body.scrollLeft || 0;
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clone.removeAttribute("id");
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clone.style.position = "absolute";
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clone.style.top = top + scrollTop + "px";
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clone.style.left = left + scrollLeft + "px";
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clone.style.width = width + "px";
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clone.style.height = height + "px";
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clone.style.transform = "";
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return clone;
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};
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var createCustomEvent = function createCustomEvent(type, params) {
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var eventParams = _extends({
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bubbles: false,
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cancelable: false,
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detail: undefined
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}, params);
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if (typeof window.CustomEvent === "function") {
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return new CustomEvent(type, eventParams);
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}
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var customEvent = document.createEvent("CustomEvent");
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customEvent.initCustomEvent(type, eventParams.bubbles, eventParams.cancelable, eventParams.detail);
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return customEvent;
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};
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var mediumZoom = function mediumZoom(selector) {
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var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
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var Promise = window.Promise || function Promise(fn) {
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function noop() {}
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fn(noop, noop);
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};
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var _handleClick = function _handleClick(event) {
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var target = event.target;
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if (target === overlay) {
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close();
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return;
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}
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if (images.indexOf(target) === -1) {
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return;
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}
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toggle({
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target: target
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});
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};
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var _handleScroll = function _handleScroll() {
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if (isAnimating || !active.original) {
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return;
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}
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var currentScroll = window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop || 0;
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if (Math.abs(scrollTop - currentScroll) > zoomOptions.scrollOffset) {
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setTimeout(close, 150);
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}
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};
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var _handleKeyUp = function _handleKeyUp(event) {
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var key = event.key || event.keyCode;
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if (key === "Escape" || key === "Esc" || key === 27) {
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close();
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}
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};
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var update = function update() {
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var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
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var newOptions = options;
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if (options.background) {
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overlay.style.background = options.background;
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}
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if (options.container && options.container instanceof Object) {
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newOptions.container = _extends({}, zoomOptions.container, options.container);
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}
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if (options.template) {
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var template = isNode(options.template) ? options.template : document.querySelector(options.template);
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newOptions.template = template;
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}
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zoomOptions = _extends({}, zoomOptions, newOptions);
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images.forEach(function(image) {
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image.dispatchEvent(createCustomEvent("medium-zoom:update", {
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detail: {
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zoom: zoom
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}
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}));
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});
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return zoom;
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};
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var clone = function clone() {
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var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
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return mediumZoom(_extends({}, zoomOptions, options));
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};
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var attach = function attach() {
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for (var _len = arguments.length, selectors = Array(_len), _key = 0; _key < _len; _key++) {
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selectors[_key] = arguments[_key];
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}
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var newImages = selectors.reduce(function(imagesAccumulator, currentSelector) {
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return [].concat(imagesAccumulator, getImagesFromSelector(currentSelector));
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}, []);
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newImages.filter(function(newImage) {
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return images.indexOf(newImage) === -1;
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}).forEach(function(newImage) {
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images.push(newImage);
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newImage.classList.add("medium-zoom-image");
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});
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eventListeners.forEach(function(_ref) {
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var type = _ref.type, listener = _ref.listener, options = _ref.options;
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newImages.forEach(function(image) {
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image.addEventListener(type, listener, options);
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});
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});
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return zoom;
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};
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var detach = function detach() {
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for (var _len2 = arguments.length, selectors = Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
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selectors[_key2] = arguments[_key2];
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}
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if (active.zoomed) {
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close();
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}
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var imagesToDetach = selectors.length > 0 ? selectors.reduce(function(imagesAccumulator, currentSelector) {
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return [].concat(imagesAccumulator, getImagesFromSelector(currentSelector));
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}, []) : images;
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imagesToDetach.forEach(function(image) {
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image.classList.remove("medium-zoom-image");
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image.dispatchEvent(createCustomEvent("medium-zoom:detach", {
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detail: {
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zoom: zoom
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}
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}));
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});
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images = images.filter(function(image) {
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return imagesToDetach.indexOf(image) === -1;
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});
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return zoom;
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};
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var on = function on(type, listener) {
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var options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
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images.forEach(function(image) {
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image.addEventListener("medium-zoom:" + type, listener, options);
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});
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eventListeners.push({
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type: "medium-zoom:" + type,
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listener: listener,
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options: options
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});
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return zoom;
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};
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var off = function off(type, listener) {
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var options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
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images.forEach(function(image) {
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image.removeEventListener("medium-zoom:" + type, listener, options);
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});
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eventListeners = eventListeners.filter(function(eventListener) {
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return !(eventListener.type === "medium-zoom:" + type && eventListener.listener.toString() === listener.toString());
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});
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return zoom;
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};
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var open = function open() {
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var _ref2 = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {}, target = _ref2.target;
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var _animate = function _animate() {
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var container = {
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width: document.documentElement.clientWidth,
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height: document.documentElement.clientHeight,
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left: 0,
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top: 0,
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right: 0,
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bottom: 0
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};
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var viewportWidth = void 0;
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var viewportHeight = void 0;
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if (zoomOptions.container) {
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if (zoomOptions.container instanceof Object) {
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container = _extends({}, container, zoomOptions.container);
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viewportWidth = container.width - container.left - container.right - zoomOptions.margin * 2;
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viewportHeight = container.height - container.top - container.bottom - zoomOptions.margin * 2;
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} else {
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var zoomContainer = isNode(zoomOptions.container) ? zoomOptions.container : document.querySelector(zoomOptions.container);
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var _zoomContainer$getBou = zoomContainer.getBoundingClientRect(), _width = _zoomContainer$getBou.width, _height = _zoomContainer$getBou.height, _left = _zoomContainer$getBou.left, _top = _zoomContainer$getBou.top;
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container = _extends({}, container, {
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width: _width,
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height: _height,
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left: _left,
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top: _top
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});
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}
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}
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viewportWidth = viewportWidth || container.width - zoomOptions.margin * 2;
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viewportHeight = viewportHeight || container.height - zoomOptions.margin * 2;
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var zoomTarget = active.zoomedHd || active.original;
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var naturalWidth = isSvg(zoomTarget) ? viewportWidth : zoomTarget.naturalWidth || viewportWidth;
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var naturalHeight = isSvg(zoomTarget) ? viewportHeight : zoomTarget.naturalHeight || viewportHeight;
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var _zoomTarget$getBoundi = zoomTarget.getBoundingClientRect(), top = _zoomTarget$getBoundi.top, left = _zoomTarget$getBoundi.left, width = _zoomTarget$getBoundi.width, height = _zoomTarget$getBoundi.height;
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var scaleX = Math.min(naturalWidth, viewportWidth) / width;
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var scaleY = Math.min(naturalHeight, viewportHeight) / height;
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var scale = Math.min(scaleX, scaleY);
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var translateX = (-left + (viewportWidth - width) / 2 + zoomOptions.margin + container.left) / scale;
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var translateY = (-top + (viewportHeight - height) / 2 + zoomOptions.margin + container.top) / scale;
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var transform = "scale(" + scale + ") translate3d(" + translateX + "px, " + translateY + "px, 0)";
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active.zoomed.style.transform = transform;
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if (active.zoomedHd) {
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active.zoomedHd.style.transform = transform;
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}
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};
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return new Promise(function(resolve) {
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if (target && images.indexOf(target) === -1) {
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resolve(zoom);
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return;
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}
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var _handleOpenEnd = function _handleOpenEnd() {
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isAnimating = false;
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active.zoomed.removeEventListener("transitionend", _handleOpenEnd);
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active.original.dispatchEvent(createCustomEvent("medium-zoom:opened", {
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detail: {
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zoom: zoom
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}
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}));
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resolve(zoom);
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};
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if (active.zoomed) {
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resolve(zoom);
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return;
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}
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if (target) {
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active.original = target;
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} else if (images.length > 0) {
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var _images = images;
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active.original = _images[0];
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} else {
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resolve(zoom);
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return;
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}
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active.original.dispatchEvent(createCustomEvent("medium-zoom:open", {
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detail: {
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zoom: zoom
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}
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}));
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scrollTop = window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop || 0;
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isAnimating = true;
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active.zoomed = cloneTarget(active.original);
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document.body.appendChild(overlay);
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if (zoomOptions.template) {
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var template = isNode(zoomOptions.template) ? zoomOptions.template : document.querySelector(zoomOptions.template);
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active.template = document.createElement("div");
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active.template.appendChild(template.content.cloneNode(true));
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document.body.appendChild(active.template);
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}
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document.body.appendChild(active.zoomed);
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window.requestAnimationFrame(function() {
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document.body.classList.add("medium-zoom--opened");
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});
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active.original.classList.add("medium-zoom-image--hidden");
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active.zoomed.classList.add("medium-zoom-image--opened");
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active.zoomed.addEventListener("click", close);
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active.zoomed.addEventListener("transitionend", _handleOpenEnd);
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if (active.original.getAttribute("data-zoom-src")) {
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active.zoomedHd = active.zoomed.cloneNode();
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active.zoomedHd.removeAttribute("srcset");
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active.zoomedHd.removeAttribute("sizes");
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active.zoomedHd.src = active.zoomed.getAttribute("data-zoom-src");
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active.zoomedHd.onerror = function() {
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clearInterval(getZoomTargetSize);
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console.warn("Unable to reach the zoom image target " + active.zoomedHd.src);
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active.zoomedHd = null;
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_animate();
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};
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var getZoomTargetSize = setInterval(function() {
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if (active.zoomedHd.complete) {
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clearInterval(getZoomTargetSize);
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active.zoomedHd.classList.add("medium-zoom-image--opened");
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active.zoomedHd.addEventListener("click", close);
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document.body.appendChild(active.zoomedHd);
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_animate();
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}
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}, 10);
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} else if (active.original.hasAttribute("srcset")) {
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active.zoomedHd = active.zoomed.cloneNode();
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active.zoomedHd.removeAttribute("sizes");
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var loadEventListener = active.zoomedHd.addEventListener("load", function() {
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active.zoomedHd.removeEventListener("load", loadEventListener);
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active.zoomedHd.classList.add("medium-zoom-image--opened");
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active.zoomedHd.addEventListener("click", close);
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document.body.appendChild(active.zoomedHd);
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_animate();
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});
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} else {
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_animate();
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}
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});
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};
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var close = function close() {
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return new Promise(function(resolve) {
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if (isAnimating || !active.original) {
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resolve(zoom);
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return;
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}
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var _handleCloseEnd = function _handleCloseEnd() {
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active.original.classList.remove("medium-zoom-image--hidden");
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document.body.removeChild(active.zoomed);
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if (active.zoomedHd) {
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document.body.removeChild(active.zoomedHd);
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}
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document.body.removeChild(overlay);
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active.zoomed.classList.remove("medium-zoom-image--opened");
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if (active.template) {
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document.body.removeChild(active.template);
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}
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isAnimating = false;
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active.zoomed.removeEventListener("transitionend", _handleCloseEnd);
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active.original.dispatchEvent(createCustomEvent("medium-zoom:closed", {
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detail: {
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zoom: zoom
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}
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}));
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active.original = null;
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active.zoomed = null;
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active.zoomedHd = null;
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active.template = null;
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resolve(zoom);
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};
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isAnimating = true;
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document.body.classList.remove("medium-zoom--opened");
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active.zoomed.style.transform = "";
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if (active.zoomedHd) {
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active.zoomedHd.style.transform = "";
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}
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if (active.template) {
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active.template.style.transition = "opacity 150ms";
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active.template.style.opacity = 0;
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}
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active.original.dispatchEvent(createCustomEvent("medium-zoom:close", {
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detail: {
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zoom: zoom
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}
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}));
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active.zoomed.addEventListener("transitionend", _handleCloseEnd);
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});
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};
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var toggle = function toggle() {
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var _ref3 = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {}, target = _ref3.target;
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if (active.original) {
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return close();
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}
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return open({
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target: target
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});
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};
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var getOptions = function getOptions() {
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return zoomOptions;
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};
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var getImages = function getImages() {
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return images;
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};
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var getZoomedImage = function getZoomedImage() {
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return active.original;
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};
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var images = [];
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var eventListeners = [];
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var isAnimating = false;
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var scrollTop = 0;
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var zoomOptions = options;
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var active = {
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original: null,
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zoomed: null,
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zoomedHd: null,
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template: null
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};
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if (Object.prototype.toString.call(selector) === "[object Object]") {
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zoomOptions = selector;
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} else if (selector || typeof selector === "string") {
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attach(selector);
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}
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zoomOptions = _extends({
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margin: 0,
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background: "#fff",
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scrollOffset: 40,
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container: null,
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template: null
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}, zoomOptions);
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var overlay = createOverlay(zoomOptions.background);
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document.addEventListener("click", _handleClick);
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document.addEventListener("keyup", _handleKeyUp);
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document.addEventListener("scroll", _handleScroll);
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window.addEventListener("resize", close);
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var zoom = {
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open: open,
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close: close,
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toggle: toggle,
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update: update,
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clone: clone,
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attach: attach,
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detach: detach,
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on: on,
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off: off,
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getOptions: getOptions,
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getImages: getImages,
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getZoomedImage: getZoomedImage
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};
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return zoom;
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};
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return mediumZoom;
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});
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