533 lines
20 KiB
JavaScript
533 lines
20 KiB
JavaScript
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"use strict";
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(self["__WordPressPrivateInteractivityAPI__"] = self["__WordPressPrivateInteractivityAPI__"] || []).push([[354],{
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/***/ 699:
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/***/ (function(__unused_webpack_module, __unused_webpack___webpack_exports__, __webpack_require__) {
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/* harmony import */ var _wordpress_interactivity__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(754);
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/**
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* WordPress dependencies
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*/
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const focusableSelectors = ['a[href]', 'area[href]', 'input:not([disabled]):not([type="hidden"]):not([aria-hidden])', 'select:not([disabled]):not([aria-hidden])', 'textarea:not([disabled]):not([aria-hidden])', 'button:not([disabled]):not([aria-hidden])', 'iframe', 'object', 'embed', '[contenteditable]', '[tabindex]:not([tabindex^="-"])'];
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/*
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* Stores a context-bound scroll handler.
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*
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* This callback could be defined inline inside of the store
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* object but it's created externally to avoid confusion about
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* how its logic is called. This logic is not referenced directly
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* by the directives in the markup because the scroll event we
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* need to listen to is triggered on the window; so by defining it
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* outside of the store, we signal that the behavior here is different.
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* If we find a compelling reason to move it to the store, feel free.
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*
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* @type {Function}
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*/
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let scrollCallback;
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/*
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* Tracks whether user is touching screen; used to
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* differentiate behavior for touch and mouse input.
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*
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* @type {boolean}
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*/
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let isTouching = false;
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/*
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* Tracks the last time the screen was touched; used to
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* differentiate behavior for touch and mouse input.
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*
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* @type {number}
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*/
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let lastTouchTime = 0;
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/*
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* Lightbox page-scroll handler: prevents scrolling.
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*
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* This handler is added to prevent scrolling behaviors that
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* trigger content shift while the lightbox is open.
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*
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* It would be better to accomplish this through CSS alone, but
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* using overflow: hidden is currently the only way to do so, and
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* that causes the layout to shift and prevents the zoom animation
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* from working in some cases because we're unable to account for
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* the layout shift when doing the animation calculations. Instead,
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* here we use JavaScript to prevent and reset the scrolling
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* behavior. In the future, we may be able to use CSS or overflow: hidden
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* instead to not rely on JavaScript, but this seems to be the best approach
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* for now that provides the best visual experience.
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*
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* @param {Object} context Interactivity page context?
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*/
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function handleScroll(context) {
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// We can't override the scroll behavior on mobile devices
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// because doing so breaks the pinch to zoom functionality, and we
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// want to allow users to zoom in further on the high-res image.
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if (!isTouching && Date.now() - lastTouchTime > 450) {
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// We are unable to use event.preventDefault() to prevent scrolling
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// because the scroll event can't be canceled, so we reset the position instead.
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window.scrollTo(context.core.image.scrollLeftReset, context.core.image.scrollTopReset);
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}
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}
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(0,_wordpress_interactivity__WEBPACK_IMPORTED_MODULE_0__/* .store */ .h)({
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state: {
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core: {
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image: {
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windowWidth: window.innerWidth,
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windowHeight: window.innerHeight
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}
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}
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},
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actions: {
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core: {
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image: {
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showLightbox: ({
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context,
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event
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}) => {
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// We can't initialize the lightbox until the reference
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// image is loaded, otherwise the UX is broken.
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if (!context.core.image.imageLoaded) {
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return;
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}
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context.core.image.initialized = true;
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context.core.image.lastFocusedElement = window.document.activeElement;
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context.core.image.scrollDelta = 0;
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context.core.image.pointerType = event.pointerType;
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context.core.image.lightboxEnabled = true;
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setStyles(context, context.core.image.imageRef);
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context.core.image.scrollTopReset = window.pageYOffset || document.documentElement.scrollTop;
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// In most cases, this value will be 0, but this is included
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// in case a user has created a page with horizontal scrolling.
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context.core.image.scrollLeftReset = window.pageXOffset || document.documentElement.scrollLeft;
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// We define and bind the scroll callback here so
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// that we can pass the context and as an argument.
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// We may be able to change this in the future if we
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// define the scroll callback in the store instead, but
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// this approach seems to tbe clearest for now.
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scrollCallback = handleScroll.bind(null, context);
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// We need to add a scroll event listener to the window
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// here because we are unable to otherwise access it via
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// the Interactivity API directives. If we add a native way
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// to access the window, we can remove this.
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window.addEventListener('scroll', scrollCallback, false);
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},
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hideLightbox: async ({
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context
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}) => {
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context.core.image.hideAnimationEnabled = true;
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if (context.core.image.lightboxEnabled) {
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// We want to wait until the close animation is completed
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// before allowing a user to scroll again. The duration of this
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// animation is defined in the styles.scss and depends on if the
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// animation is 'zoom' or 'fade', but in any case we should wait
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// a few milliseconds longer than the duration, otherwise a user
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// may scroll too soon and cause the animation to look sloppy.
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setTimeout(function () {
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window.removeEventListener('scroll', scrollCallback);
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// If we don't delay before changing the focus,
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// the focus ring will appear on Firefox before
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// the image has finished animating, which looks broken.
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context.core.image.lightboxTriggerRef.focus({
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preventScroll: true
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});
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}, 450);
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context.core.image.lightboxEnabled = false;
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}
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},
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handleKeydown: ({
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context,
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actions,
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event
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}) => {
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if (context.core.image.lightboxEnabled) {
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if (event.key === 'Tab' || event.keyCode === 9) {
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// If shift + tab it change the direction
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if (event.shiftKey && window.document.activeElement === context.core.image.firstFocusableElement) {
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event.preventDefault();
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context.core.image.lastFocusableElement.focus();
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} else if (!event.shiftKey && window.document.activeElement === context.core.image.lastFocusableElement) {
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event.preventDefault();
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context.core.image.firstFocusableElement.focus();
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}
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}
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if (event.key === 'Escape' || event.keyCode === 27) {
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actions.core.image.hideLightbox({
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context,
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event
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});
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}
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}
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},
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// This is fired just by lazily loaded
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// images on the page, not all images.
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handleLoad: ({
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context,
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effects,
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ref
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}) => {
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context.core.image.imageLoaded = true;
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context.core.image.imageCurrentSrc = ref.currentSrc;
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effects.core.image.setButtonStyles({
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context,
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ref
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});
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},
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handleTouchStart: () => {
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isTouching = true;
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},
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handleTouchMove: ({
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context,
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event
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}) => {
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// On mobile devices, we want to prevent triggering the
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// scroll event because otherwise the page jumps around as
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// we reset the scroll position. This also means that closing
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// the lightbox requires that a user perform a simple tap. This
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// may be changed in the future if we find a better alternative
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// to override or reset the scroll position during swipe actions.
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if (context.core.image.lightboxEnabled) {
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event.preventDefault();
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}
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},
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handleTouchEnd: () => {
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// We need to wait a few milliseconds before resetting
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// to ensure that pinch to zoom works consistently
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// on mobile devices when the lightbox is open.
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lastTouchTime = Date.now();
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isTouching = false;
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}
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}
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}
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},
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selectors: {
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core: {
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image: {
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roleAttribute: ({
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context
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}) => {
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return context.core.image.lightboxEnabled ? 'dialog' : null;
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},
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ariaModal: ({
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context
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}) => {
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return context.core.image.lightboxEnabled ? 'true' : null;
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},
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dialogLabel: ({
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context
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}) => {
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return context.core.image.lightboxEnabled ? context.core.image.dialogLabel : null;
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},
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lightboxObjectFit: ({
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context
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}) => {
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if (context.core.image.initialized) {
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return 'cover';
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}
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},
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enlargedImgSrc: ({
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context
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}) => {
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return context.core.image.initialized ? context.core.image.imageUploadedSrc : 'data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=';
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}
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}
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}
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},
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effects: {
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core: {
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image: {
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initOriginImage: ({
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context,
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ref
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}) => {
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context.core.image.imageRef = ref;
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context.core.image.lightboxTriggerRef = ref.parentElement.querySelector('.lightbox-trigger');
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if (ref.complete) {
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context.core.image.imageLoaded = true;
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context.core.image.imageCurrentSrc = ref.currentSrc;
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}
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},
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initLightbox: async ({
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context,
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ref
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}) => {
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if (context.core.image.lightboxEnabled) {
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const focusableElements = ref.querySelectorAll(focusableSelectors);
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context.core.image.firstFocusableElement = focusableElements[0];
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context.core.image.lastFocusableElement = focusableElements[focusableElements.length - 1];
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// Move focus to the dialog when opening it.
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ref.focus();
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}
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},
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setButtonStyles: ({
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context,
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ref
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}) => {
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const {
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naturalWidth,
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naturalHeight,
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offsetWidth,
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offsetHeight
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} = ref;
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// If the image isn't loaded yet, we can't
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// calculate where the button should be.
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if (naturalWidth === 0 || naturalHeight === 0) {
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return;
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}
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const figure = ref.parentElement;
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const figureWidth = ref.parentElement.clientWidth;
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// We need special handling for the height because
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// a caption will cause the figure to be taller than
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// the image, which means we need to account for that
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// when calculating the placement of the button in the
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// top right corner of the image.
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let figureHeight = ref.parentElement.clientHeight;
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const caption = figure.querySelector('figcaption');
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if (caption) {
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const captionComputedStyle = window.getComputedStyle(caption);
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figureHeight = figureHeight - caption.offsetHeight - parseFloat(captionComputedStyle.marginTop) - parseFloat(captionComputedStyle.marginBottom);
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}
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const buttonOffsetTop = figureHeight - offsetHeight;
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const buttonOffsetRight = figureWidth - offsetWidth;
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// In the case of an image with object-fit: contain, the
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// size of the <img> element can be larger than the image itself,
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// so we need to calculate where to place the button.
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if (context.core.image.scaleAttr === 'contain') {
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// Natural ratio of the image.
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const naturalRatio = naturalWidth / naturalHeight;
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// Offset ratio of the image.
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const offsetRatio = offsetWidth / offsetHeight;
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if (naturalRatio >= offsetRatio) {
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// If it reaches the width first, keep
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// the width and compute the height.
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const referenceHeight = offsetWidth / naturalRatio;
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context.core.image.imageButtonTop = (offsetHeight - referenceHeight) / 2 + buttonOffsetTop + 16;
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context.core.image.imageButtonRight = buttonOffsetRight + 16;
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} else {
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// If it reaches the height first, keep
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// the height and compute the width.
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const referenceWidth = offsetHeight * naturalRatio;
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context.core.image.imageButtonTop = buttonOffsetTop + 16;
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context.core.image.imageButtonRight = (offsetWidth - referenceWidth) / 2 + buttonOffsetRight + 16;
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}
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} else {
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context.core.image.imageButtonTop = buttonOffsetTop + 16;
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context.core.image.imageButtonRight = buttonOffsetRight + 16;
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}
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},
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setStylesOnResize: ({
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state,
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context,
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ref
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}) => {
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if (context.core.image.lightboxEnabled && (state.core.image.windowWidth || state.core.image.windowHeight)) {
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setStyles(context, ref);
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}
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}
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}
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}
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}
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}, {
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afterLoad: ({
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state
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}) => {
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window.addEventListener('resize', debounce(() => {
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state.core.image.windowWidth = window.innerWidth;
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state.core.image.windowHeight = window.innerHeight;
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}));
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}
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});
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/*
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* Computes styles for the lightbox and adds them to the document.
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*
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* @function
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* @param {Object} context - An Interactivity API context
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* @param {Object} event - A triggering event
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*/
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function setStyles(context, ref) {
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// The reference img element lies adjacent
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// to the event target button in the DOM.
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let {
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naturalWidth,
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naturalHeight,
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offsetWidth: originalWidth,
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offsetHeight: originalHeight
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} = ref;
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let {
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x: screenPosX,
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y: screenPosY
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} = ref.getBoundingClientRect();
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// Natural ratio of the image clicked to open the lightbox.
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const naturalRatio = naturalWidth / naturalHeight;
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// Original ratio of the image clicked to open the lightbox.
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let originalRatio = originalWidth / originalHeight;
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// If it has object-fit: contain, recalculate the original sizes
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// and the screen position without the blank spaces.
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if (context.core.image.scaleAttr === 'contain') {
|
||
|
|
if (naturalRatio > originalRatio) {
|
||
|
|
const heightWithoutSpace = originalWidth / naturalRatio;
|
||
|
|
// Recalculate screen position without the top space.
|
||
|
|
screenPosY += (originalHeight - heightWithoutSpace) / 2;
|
||
|
|
originalHeight = heightWithoutSpace;
|
||
|
|
} else {
|
||
|
|
const widthWithoutSpace = originalHeight * naturalRatio;
|
||
|
|
// Recalculate screen position without the left space.
|
||
|
|
screenPosX += (originalWidth - widthWithoutSpace) / 2;
|
||
|
|
originalWidth = widthWithoutSpace;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
originalRatio = originalWidth / originalHeight;
|
||
|
|
|
||
|
|
// Typically, we use the image's full-sized dimensions. If those
|
||
|
|
// dimensions have not been set (i.e. an external image with only one size),
|
||
|
|
// the image's dimensions in the lightbox are the same
|
||
|
|
// as those of the image in the content.
|
||
|
|
let imgMaxWidth = parseFloat(context.core.image.targetWidth !== 'none' ? context.core.image.targetWidth : naturalWidth);
|
||
|
|
let imgMaxHeight = parseFloat(context.core.image.targetHeight !== 'none' ? context.core.image.targetHeight : naturalHeight);
|
||
|
|
|
||
|
|
// Ratio of the biggest image stored in the database.
|
||
|
|
let imgRatio = imgMaxWidth / imgMaxHeight;
|
||
|
|
let containerMaxWidth = imgMaxWidth;
|
||
|
|
let containerMaxHeight = imgMaxHeight;
|
||
|
|
let containerWidth = imgMaxWidth;
|
||
|
|
let containerHeight = imgMaxHeight;
|
||
|
|
// Check if the target image has a different ratio than the original one (thumbnail).
|
||
|
|
// Recalculate the width and height.
|
||
|
|
if (naturalRatio.toFixed(2) !== imgRatio.toFixed(2)) {
|
||
|
|
if (naturalRatio > imgRatio) {
|
||
|
|
// If the width is reached before the height, we keep the maxWidth
|
||
|
|
// and recalculate the height.
|
||
|
|
// Unless the difference between the maxHeight and the reducedHeight
|
||
|
|
// is higher than the maxWidth, where we keep the reducedHeight and
|
||
|
|
// recalculate the width.
|
||
|
|
const reducedHeight = imgMaxWidth / naturalRatio;
|
||
|
|
if (imgMaxHeight - reducedHeight > imgMaxWidth) {
|
||
|
|
imgMaxHeight = reducedHeight;
|
||
|
|
imgMaxWidth = reducedHeight * naturalRatio;
|
||
|
|
} else {
|
||
|
|
imgMaxHeight = imgMaxWidth / naturalRatio;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
// If the height is reached before the width, we keep the maxHeight
|
||
|
|
// and recalculate the width.
|
||
|
|
// Unless the difference between the maxWidth and the reducedWidth
|
||
|
|
// is higher than the maxHeight, where we keep the reducedWidth and
|
||
|
|
// recalculate the height.
|
||
|
|
const reducedWidth = imgMaxHeight * naturalRatio;
|
||
|
|
if (imgMaxWidth - reducedWidth > imgMaxHeight) {
|
||
|
|
imgMaxWidth = reducedWidth;
|
||
|
|
imgMaxHeight = reducedWidth / naturalRatio;
|
||
|
|
} else {
|
||
|
|
imgMaxWidth = imgMaxHeight * naturalRatio;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
containerWidth = imgMaxWidth;
|
||
|
|
containerHeight = imgMaxHeight;
|
||
|
|
imgRatio = imgMaxWidth / imgMaxHeight;
|
||
|
|
|
||
|
|
// Calculate the max size of the container.
|
||
|
|
if (originalRatio > imgRatio) {
|
||
|
|
containerMaxWidth = imgMaxWidth;
|
||
|
|
containerMaxHeight = containerMaxWidth / originalRatio;
|
||
|
|
} else {
|
||
|
|
containerMaxHeight = imgMaxHeight;
|
||
|
|
containerMaxWidth = containerMaxHeight * originalRatio;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// If the image has been pixelated on purpose, keep that size.
|
||
|
|
if (originalWidth > containerWidth || originalHeight > containerHeight) {
|
||
|
|
containerWidth = originalWidth;
|
||
|
|
containerHeight = originalHeight;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Calculate the final lightbox image size and the
|
||
|
|
// scale factor. MaxWidth is either the window container
|
||
|
|
// (accounting for padding) or the image resolution.
|
||
|
|
let horizontalPadding = 0;
|
||
|
|
if (window.innerWidth > 480) {
|
||
|
|
horizontalPadding = 80;
|
||
|
|
} else if (window.innerWidth > 1920) {
|
||
|
|
horizontalPadding = 160;
|
||
|
|
}
|
||
|
|
const verticalPadding = 80;
|
||
|
|
const targetMaxWidth = Math.min(window.innerWidth - horizontalPadding, containerWidth);
|
||
|
|
const targetMaxHeight = Math.min(window.innerHeight - verticalPadding, containerHeight);
|
||
|
|
const targetContainerRatio = targetMaxWidth / targetMaxHeight;
|
||
|
|
if (originalRatio > targetContainerRatio) {
|
||
|
|
// If targetMaxWidth is reached before targetMaxHeight
|
||
|
|
containerWidth = targetMaxWidth;
|
||
|
|
containerHeight = containerWidth / originalRatio;
|
||
|
|
} else {
|
||
|
|
// If targetMaxHeight is reached before targetMaxWidth
|
||
|
|
containerHeight = targetMaxHeight;
|
||
|
|
containerWidth = containerHeight * originalRatio;
|
||
|
|
}
|
||
|
|
const containerScale = originalWidth / containerWidth;
|
||
|
|
const lightboxImgWidth = imgMaxWidth * (containerWidth / containerMaxWidth);
|
||
|
|
const lightboxImgHeight = imgMaxHeight * (containerHeight / containerMaxHeight);
|
||
|
|
|
||
|
|
// Add the CSS variables needed.
|
||
|
|
let styleTag = document.getElementById('wp-lightbox-styles');
|
||
|
|
if (!styleTag) {
|
||
|
|
styleTag = document.createElement('style');
|
||
|
|
styleTag.id = 'wp-lightbox-styles';
|
||
|
|
document.head.appendChild(styleTag);
|
||
|
|
}
|
||
|
|
|
||
|
|
// As of this writing, using the calculations above will render the lightbox
|
||
|
|
// with a small, erroneous whitespace on the left side of the image in iOS Safari,
|
||
|
|
// perhaps due to an inconsistency in how browsers handle absolute positioning and CSS
|
||
|
|
// transformation. In any case, adding 1 pixel to the container width and height solves
|
||
|
|
// the problem, though this can be removed if the issue is fixed in the future.
|
||
|
|
styleTag.innerHTML = `
|
||
|
|
:root {
|
||
|
|
--wp--lightbox-initial-top-position: ${screenPosY}px;
|
||
|
|
--wp--lightbox-initial-left-position: ${screenPosX}px;
|
||
|
|
--wp--lightbox-container-width: ${containerWidth + 1}px;
|
||
|
|
--wp--lightbox-container-height: ${containerHeight + 1}px;
|
||
|
|
--wp--lightbox-image-width: ${lightboxImgWidth}px;
|
||
|
|
--wp--lightbox-image-height: ${lightboxImgHeight}px;
|
||
|
|
--wp--lightbox-scale: ${containerScale};
|
||
|
|
}
|
||
|
|
`;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Debounces a function call.
|
||
|
|
*
|
||
|
|
* @function
|
||
|
|
* @param {Function} func - A function to be called
|
||
|
|
* @param {number} wait - The time to wait before calling the function
|
||
|
|
*/
|
||
|
|
function debounce(func, wait = 50) {
|
||
|
|
let timeout;
|
||
|
|
return () => {
|
||
|
|
const later = () => {
|
||
|
|
timeout = null;
|
||
|
|
func();
|
||
|
|
};
|
||
|
|
clearTimeout(timeout);
|
||
|
|
timeout = setTimeout(later, wait);
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
/***/ })
|
||
|
|
|
||
|
|
},
|
||
|
|
/******/ function(__webpack_require__) { // webpackRuntimeModules
|
||
|
|
/******/ var __webpack_exec__ = function(moduleId) { return __webpack_require__(__webpack_require__.s = moduleId); }
|
||
|
|
/******/ var __webpack_exports__ = (__webpack_exec__(699));
|
||
|
|
/******/ }
|
||
|
|
]);
|