updux/docs-docsidy/docsify/plugins/zoom-image.js
2024-08-08 09:28:44 -04:00

669 lines
22 KiB
JavaScript

(function () {
/*! medium-zoom 1.0.8 | MIT License | https://github.com/francoischalifour/medium-zoom */
var _extends = Object.assign || function (target) {
var arguments$1 = arguments;
for (var i = 1; i < arguments.length; i++) {
var source = arguments$1[i];
for (var key in source) {
if (Object.prototype.hasOwnProperty.call(source, key)) {
target[key] = source[key];
}
}
}
return target;
};
var isSupported = function isSupported(node) {
return node.tagName === 'IMG';
};
/* eslint-disable-next-line no-prototype-builtins */
var isNodeList = function isNodeList(selector) {
return NodeList.prototype.isPrototypeOf(selector);
};
var isNode = function isNode(selector) {
return selector && selector.nodeType === 1;
};
var isSvg = function isSvg(image) {
var source = image.currentSrc || image.src;
return source.substr(-4).toLowerCase() === '.svg';
};
var getImagesFromSelector = function getImagesFromSelector(selector) {
try {
if (Array.isArray(selector)) {
return selector.filter(isSupported);
}
if (isNodeList(selector)) {
// Do not use spread operator or Array.from() for IE support
return [].slice.call(selector).filter(isSupported);
}
if (isNode(selector)) {
return [selector].filter(isSupported);
}
if (typeof selector === 'string') {
// Do not use spread operator or Array.from() for IE support
return [].slice.call(document.querySelectorAll(selector)).filter(isSupported);
}
return [];
} catch (err) {
throw new TypeError('The provided selector is invalid.\n' + 'Expects a CSS selector, a Node element, a NodeList or an array.\n' + 'See: https://github.com/francoischalifour/medium-zoom');
}
};
var createOverlay = function createOverlay(background) {
var overlay = document.createElement('div');
overlay.classList.add('medium-zoom-overlay');
overlay.style.background = background;
return overlay;
};
var cloneTarget = function cloneTarget(template) {
var _template$getBounding = template.getBoundingClientRect(),
top = _template$getBounding.top,
left = _template$getBounding.left,
width = _template$getBounding.width,
height = _template$getBounding.height;
var clone = template.cloneNode();
var scrollTop = window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop || 0;
var scrollLeft = window.pageXOffset || document.documentElement.scrollLeft || document.body.scrollLeft || 0;
clone.removeAttribute('id');
clone.style.position = 'absolute';
clone.style.top = top + scrollTop + 'px';
clone.style.left = left + scrollLeft + 'px';
clone.style.width = width + 'px';
clone.style.height = height + 'px';
clone.style.transform = '';
return clone;
};
var createCustomEvent = function createCustomEvent(type, params) {
var eventParams = _extends({
bubbles: false,
cancelable: false,
detail: undefined
}, params);
if (typeof window.CustomEvent === 'function') {
return new CustomEvent(type, eventParams);
}
var customEvent = document.createEvent('CustomEvent');
customEvent.initCustomEvent(type, eventParams.bubbles, eventParams.cancelable, eventParams.detail);
return customEvent;
};
var mediumZoom = function mediumZoom(selector) {
var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
/**
* Ensure the compatibility with IE11 if no Promise polyfill are used.
*/
var Promise = window.Promise || function Promise(fn) {
function noop() {}
fn(noop, noop);
};
var _handleClick = function _handleClick(event) {
var target = event.target;
if (target === overlay) {
close();
return;
}
if (images.indexOf(target) === -1) {
return;
}
toggle({ target: target });
};
var _handleScroll = function _handleScroll() {
if (isAnimating || !active.original) {
return;
}
var currentScroll = window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop || 0;
if (Math.abs(scrollTop - currentScroll) > zoomOptions.scrollOffset) {
setTimeout(close, 150);
}
};
var _handleKeyUp = function _handleKeyUp(event) {
var key = event.key || event.keyCode;
// Close if escape key is pressed
if (key === 'Escape' || key === 'Esc' || key === 27) {
close();
}
};
var update = function update() {
var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
var newOptions = options;
if (options.background) {
overlay.style.background = options.background;
}
if (options.container && options.container instanceof Object) {
newOptions.container = _extends({}, zoomOptions.container, options.container);
}
if (options.template) {
var template = isNode(options.template) ? options.template : document.querySelector(options.template);
newOptions.template = template;
}
zoomOptions = _extends({}, zoomOptions, newOptions);
images.forEach(function (image) {
image.dispatchEvent(createCustomEvent('medium-zoom:update', {
detail: { zoom: zoom }
}));
});
return zoom;
};
var clone = function clone() {
var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
return mediumZoom(_extends({}, zoomOptions, options));
};
var attach = function attach() {
var arguments$1 = arguments;
for (var _len = arguments.length, selectors = Array(_len), _key = 0; _key < _len; _key++) {
selectors[_key] = arguments$1[_key];
}
var newImages = selectors.reduce(function (imagesAccumulator, currentSelector) {
return [].concat(imagesAccumulator, getImagesFromSelector(currentSelector));
}, []);
newImages.filter(function (newImage) {
return images.indexOf(newImage) === -1;
}).forEach(function (newImage) {
images.push(newImage);
newImage.classList.add('medium-zoom-image');
});
eventListeners.forEach(function (_ref) {
var type = _ref.type,
listener = _ref.listener,
options = _ref.options;
newImages.forEach(function (image) {
image.addEventListener(type, listener, options);
});
});
return zoom;
};
var detach = function detach() {
var arguments$1 = arguments;
for (var _len2 = arguments.length, selectors = Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
selectors[_key2] = arguments$1[_key2];
}
if (active.zoomed) {
close();
}
var imagesToDetach = selectors.length > 0 ? selectors.reduce(function (imagesAccumulator, currentSelector) {
return [].concat(imagesAccumulator, getImagesFromSelector(currentSelector));
}, []) : images;
imagesToDetach.forEach(function (image) {
image.classList.remove('medium-zoom-image');
image.dispatchEvent(createCustomEvent('medium-zoom:detach', {
detail: { zoom: zoom }
}));
});
images = images.filter(function (image) {
return imagesToDetach.indexOf(image) === -1;
});
return zoom;
};
var on = function on(type, listener) {
var options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
images.forEach(function (image) {
image.addEventListener('medium-zoom:' + type, listener, options);
});
eventListeners.push({ type: 'medium-zoom:' + type, listener: listener, options: options });
return zoom;
};
var off = function off(type, listener) {
var options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
images.forEach(function (image) {
image.removeEventListener('medium-zoom:' + type, listener, options);
});
eventListeners = eventListeners.filter(function (eventListener) {
return !(eventListener.type === 'medium-zoom:' + type && eventListener.listener.toString() === listener.toString());
});
return zoom;
};
var open = function open() {
var _ref2 = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {},
target = _ref2.target;
var _animate = function _animate() {
var container = {
width: document.documentElement.clientWidth,
height: document.documentElement.clientHeight,
left: 0,
top: 0,
right: 0,
bottom: 0
};
var viewportWidth = void 0;
var viewportHeight = void 0;
if (zoomOptions.container) {
if (zoomOptions.container instanceof Object) {
// The container is given as an object with properties like width, height, left, top
container = _extends({}, container, zoomOptions.container);
// We need to adjust custom options like container.right or container.bottom
viewportWidth = container.width - container.left - container.right - zoomOptions.margin * 2;
viewportHeight = container.height - container.top - container.bottom - zoomOptions.margin * 2;
} else {
// The container is given as an element
var zoomContainer = isNode(zoomOptions.container) ? zoomOptions.container : document.querySelector(zoomOptions.container);
var _zoomContainer$getBou = zoomContainer.getBoundingClientRect(),
_width = _zoomContainer$getBou.width,
_height = _zoomContainer$getBou.height,
_left = _zoomContainer$getBou.left,
_top = _zoomContainer$getBou.top;
container = _extends({}, container, {
width: _width,
height: _height,
left: _left,
top: _top
});
}
}
viewportWidth = viewportWidth || container.width - zoomOptions.margin * 2;
viewportHeight = viewportHeight || container.height - zoomOptions.margin * 2;
var zoomTarget = active.zoomedHd || active.original;
var naturalWidth = isSvg(zoomTarget) ? viewportWidth : zoomTarget.naturalWidth || viewportWidth;
var naturalHeight = isSvg(zoomTarget) ? viewportHeight : zoomTarget.naturalHeight || viewportHeight;
var _zoomTarget$getBoundi = zoomTarget.getBoundingClientRect(),
top = _zoomTarget$getBoundi.top,
left = _zoomTarget$getBoundi.left,
width = _zoomTarget$getBoundi.width,
height = _zoomTarget$getBoundi.height;
var scaleX = Math.min(Math.max(width, naturalWidth), viewportWidth) / width;
var scaleY = Math.min(Math.max(height, naturalHeight), viewportHeight) / height;
var scale = Math.min(scaleX, scaleY);
var translateX = (-left + (viewportWidth - width) / 2 + zoomOptions.margin + container.left) / scale;
var translateY = (-top + (viewportHeight - height) / 2 + zoomOptions.margin + container.top) / scale;
var transform = 'scale(' + scale + ') translate3d(' + translateX + 'px, ' + translateY + 'px, 0)';
active.zoomed.style.transform = transform;
if (active.zoomedHd) {
active.zoomedHd.style.transform = transform;
}
};
return new Promise(function (resolve) {
if (target && images.indexOf(target) === -1) {
resolve(zoom);
return;
}
var _handleOpenEnd = function _handleOpenEnd() {
isAnimating = false;
active.zoomed.removeEventListener('transitionend', _handleOpenEnd);
active.original.dispatchEvent(createCustomEvent('medium-zoom:opened', {
detail: { zoom: zoom }
}));
resolve(zoom);
};
if (active.zoomed) {
resolve(zoom);
return;
}
if (target) {
// The zoom was triggered manually via a click
active.original = target;
} else if (images.length > 0) {
var _images = images;
active.original = _images[0];
} else {
resolve(zoom);
return;
}
active.original.dispatchEvent(createCustomEvent('medium-zoom:open', {
detail: { zoom: zoom }
}));
scrollTop = window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop || 0;
isAnimating = true;
active.zoomed = cloneTarget(active.original);
document.body.appendChild(overlay);
if (zoomOptions.template) {
var template = isNode(zoomOptions.template) ? zoomOptions.template : document.querySelector(zoomOptions.template);
active.template = document.createElement('div');
active.template.appendChild(template.content.cloneNode(true));
document.body.appendChild(active.template);
}
// If the selected <img> tag is inside a <picture> tag, set the
// currently-applied source as the cloned `src=` attribute.
// (as these might differ, or src= might be unset in some cases)
if (active.original.parentElement && active.original.parentElement.tagName === 'PICTURE' && active.original.currentSrc) {
active.zoomed.src = active.original.currentSrc;
}
document.body.appendChild(active.zoomed);
window.requestAnimationFrame(function () {
document.body.classList.add('medium-zoom--opened');
});
active.original.classList.add('medium-zoom-image--hidden');
active.zoomed.classList.add('medium-zoom-image--opened');
active.zoomed.addEventListener('click', close);
active.zoomed.addEventListener('transitionend', _handleOpenEnd);
if (active.original.getAttribute('data-zoom-src')) {
active.zoomedHd = active.zoomed.cloneNode();
// Reset the `scrset` property or the HD image won't load.
active.zoomedHd.removeAttribute('srcset');
active.zoomedHd.removeAttribute('sizes');
// Remove loading attribute so the browser can load the image normally
active.zoomedHd.removeAttribute('loading');
active.zoomedHd.src = active.zoomed.getAttribute('data-zoom-src');
active.zoomedHd.onerror = function () {
clearInterval(getZoomTargetSize);
console.warn('Unable to reach the zoom image target ' + active.zoomedHd.src);
active.zoomedHd = null;
_animate();
};
// We need to access the natural size of the full HD
// target as fast as possible to compute the animation.
var getZoomTargetSize = setInterval(function () {
if ( active.zoomedHd.complete) {
clearInterval(getZoomTargetSize);
active.zoomedHd.classList.add('medium-zoom-image--opened');
active.zoomedHd.addEventListener('click', close);
document.body.appendChild(active.zoomedHd);
_animate();
}
}, 10);
} else if (active.original.hasAttribute('srcset')) {
// If an image has a `srcset` attribuet, we don't know the dimensions of the
// zoomed (HD) image (like when `data-zoom-src` is specified).
// Therefore the approach is quite similar.
active.zoomedHd = active.zoomed.cloneNode();
// Resetting the sizes attribute tells the browser to load the
// image best fitting the current viewport size, respecting the `srcset`.
active.zoomedHd.removeAttribute('sizes');
// In Firefox, the `loading` attribute needs to be set to `eager` (default
// value) for the load event to be fired.
active.zoomedHd.removeAttribute('loading');
// Wait for the load event of the hd image. This will fire if the image
// is already cached.
var loadEventListener = active.zoomedHd.addEventListener('load', function () {
active.zoomedHd.removeEventListener('load', loadEventListener);
active.zoomedHd.classList.add('medium-zoom-image--opened');
active.zoomedHd.addEventListener('click', close);
document.body.appendChild(active.zoomedHd);
_animate();
});
} else {
_animate();
}
});
};
var close = function close() {
return new Promise(function (resolve) {
if (isAnimating || !active.original) {
resolve(zoom);
return;
}
var _handleCloseEnd = function _handleCloseEnd() {
active.original.classList.remove('medium-zoom-image--hidden');
document.body.removeChild(active.zoomed);
if (active.zoomedHd) {
document.body.removeChild(active.zoomedHd);
}
document.body.removeChild(overlay);
active.zoomed.classList.remove('medium-zoom-image--opened');
if (active.template) {
document.body.removeChild(active.template);
}
isAnimating = false;
active.zoomed.removeEventListener('transitionend', _handleCloseEnd);
active.original.dispatchEvent(createCustomEvent('medium-zoom:closed', {
detail: { zoom: zoom }
}));
active.original = null;
active.zoomed = null;
active.zoomedHd = null;
active.template = null;
resolve(zoom);
};
isAnimating = true;
document.body.classList.remove('medium-zoom--opened');
active.zoomed.style.transform = '';
if (active.zoomedHd) {
active.zoomedHd.style.transform = '';
}
// Fade out the template so it's not too abrupt
if (active.template) {
active.template.style.transition = 'opacity 150ms';
active.template.style.opacity = 0;
}
active.original.dispatchEvent(createCustomEvent('medium-zoom:close', {
detail: { zoom: zoom }
}));
active.zoomed.addEventListener('transitionend', _handleCloseEnd);
});
};
var toggle = function toggle() {
var _ref3 = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {},
target = _ref3.target;
if (active.original) {
return close();
}
return open({ target: target });
};
var getOptions = function getOptions() {
return zoomOptions;
};
var getImages = function getImages() {
return images;
};
var getZoomedImage = function getZoomedImage() {
return active.original;
};
var images = [];
var eventListeners = [];
var isAnimating = false;
var scrollTop = 0;
var zoomOptions = options;
var active = {
original: null,
zoomed: null,
zoomedHd: null,
template: null
// If the selector is omitted, it's replaced by the options
};if (Object.prototype.toString.call(selector) === '[object Object]') {
zoomOptions = selector;
} else if (selector || typeof selector === 'string' // to process empty string as a selector
) {
attach(selector);
}
// Apply the default option values
zoomOptions = _extends({
margin: 0,
background: '#fff',
scrollOffset: 40,
container: null,
template: null
}, zoomOptions);
var overlay = createOverlay(zoomOptions.background);
document.addEventListener('click', _handleClick);
document.addEventListener('keyup', _handleKeyUp);
document.addEventListener('scroll', _handleScroll);
window.addEventListener('resize', close);
var zoom = {
open: open,
close: close,
toggle: toggle,
update: update,
clone: clone,
attach: attach,
detach: detach,
on: on,
off: off,
getOptions: getOptions,
getImages: getImages,
getZoomedImage: getZoomedImage
};
return zoom;
};
function styleInject(css, ref) {
if ( ref === void 0 ) { ref = {}; }
var insertAt = ref.insertAt;
if (!css || typeof document === 'undefined') { return; }
var head = document.head || document.getElementsByTagName('head')[0];
var style = document.createElement('style');
style.type = 'text/css';
if (insertAt === 'top') {
if (head.firstChild) {
head.insertBefore(style, head.firstChild);
} else {
head.appendChild(style);
}
} else {
head.appendChild(style);
}
if (style.styleSheet) {
style.styleSheet.cssText = css;
} else {
style.appendChild(document.createTextNode(css));
}
}
var css = ".medium-zoom-overlay{position:fixed;top:0;right:0;bottom:0;left:0;opacity:0;transition:opacity .3s;will-change:opacity}.medium-zoom--opened .medium-zoom-overlay{cursor:pointer;cursor:zoom-out;opacity:1}.medium-zoom-image{cursor:pointer;cursor:zoom-in;transition:transform .3s cubic-bezier(.2,0,.2,1)!important}.medium-zoom-image--hidden{visibility:hidden}.medium-zoom-image--opened{position:relative;cursor:pointer;cursor:zoom-out;will-change:transform}";
styleInject(css);
/* eslint-disable no-unused-vars */
var matchesSelector =
Element.prototype.matches ||
Element.prototype.webkitMatchesSelector ||
Element.prototype.msMatchesSelector;
function install(hook) {
var zoom;
hook.doneEach(function (_) {
var elms = Array.apply(
null,
document.querySelectorAll(
'.markdown-section img:not(.emoji):not([data-no-zoom])'
)
);
elms = elms.filter(function (elm) { return matchesSelector.call(elm, 'a img') === false; });
if (zoom) {
zoom.detach();
}
zoom = mediumZoom(elms);
});
}
$docsify.plugins = [].concat(install, $docsify.plugins);
}());