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import * as __WEBPACK_EXTERNAL_MODULE__wordpress_interactivity_8e89b257__ from "@wordpress/interactivity";
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var __webpack_exports__ = {};
;// CONCATENATED MODULE: external "@wordpress/interactivity"
var x = y => { var x = {}; __webpack_require__.d(x, y); return x; }
var y = x => () => x
var interactivity_namespaceObject = x({ ["getContext"]: () => __WEBPACK_EXTERNAL_MODULE__wordpress_interactivity_8e89b257__.getContext, ["getElement"]: () => __WEBPACK_EXTERNAL_MODULE__wordpress_interactivity_8e89b257__.getElement, ["store"]: () => __WEBPACK_EXTERNAL_MODULE__wordpress_interactivity_8e89b257__.store });
;// CONCATENATED MODULE: ./packages/block-library/src/image/view.js
/**
* WordPress dependencies
*/
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^="-"])'];
/**
* Stores a context-bound scroll handler.
*
* This callback could be defined inline inside of the store
* object but it's created externally to avoid confusion about
* how its logic is called. This logic is not referenced directly
* by the directives in the markup because the scroll event we
* need to listen to is triggered on the window; so by defining it
* outside of the store, we signal that the behavior here is different.
* If we find a compelling reason to move it to the store, feel free.
*
* @type {Function}
*/
let scrollCallback;
/**
* Tracks whether user is touching screen; used to
* differentiate behavior for touch and mouse input.
*
* @type {boolean}
*/
let isTouching = false;
/**
* Tracks the last time the screen was touched; used to
* differentiate behavior for touch and mouse input.
*
* @type {number}
*/
let lastTouchTime = 0;
/**
* Lightbox page-scroll handler: prevents scrolling.
*
* This handler is added to prevent scrolling behaviors that
* trigger content shift while the lightbox is open.
*
* It would be better to accomplish this through CSS alone, but
* using overflow: hidden is currently the only way to do so, and
* that causes the layout to shift and prevents the zoom animation
* from working in some cases because we're unable to account for
* the layout shift when doing the animation calculations. Instead,
* here we use JavaScript to prevent and reset the scrolling
* behavior. In the future, we may be able to use CSS or overflow: hidden
* instead to not rely on JavaScript, but this seems to be the best approach
* for now that provides the best visual experience.
*
* @param {Object} ctx Context object with the `core/image` namespace.
*/
function handleScroll(ctx) {
// We can't override the scroll behavior on mobile devices
// because doing so breaks the pinch to zoom functionality, and we
// want to allow users to zoom in further on the high-res image.
if (!isTouching && Date.now() - lastTouchTime > 450) {
// We are unable to use event.preventDefault() to prevent scrolling
// because the scroll event can't be canceled, so we reset the position instead.
window.scrollTo(ctx.scrollLeftReset, ctx.scrollTopReset);
}
}
const {
state,
actions,
callbacks
} = (0,interactivity_namespaceObject.store)('core/image', {
state: {
windowWidth: window.innerWidth,
windowHeight: window.innerHeight,
get roleAttribute() {
const ctx = (0,interactivity_namespaceObject.getContext)();
return ctx.lightboxEnabled ? 'dialog' : null;
},
get ariaModal() {
const ctx = (0,interactivity_namespaceObject.getContext)();
return ctx.lightboxEnabled ? 'true' : null;
},
get dialogLabel() {
const ctx = (0,interactivity_namespaceObject.getContext)();
return ctx.lightboxEnabled ? ctx.dialogLabel : null;
},
get lightboxObjectFit() {
const ctx = (0,interactivity_namespaceObject.getContext)();
if (ctx.initialized) {
return 'cover';
}
},
get enlargedImgSrc() {
const ctx = (0,interactivity_namespaceObject.getContext)();
return ctx.initialized ? ctx.imageUploadedSrc : 'data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=';
}
},
actions: {
showLightbox(event) {
const ctx = (0,interactivity_namespaceObject.getContext)();
// We can't initialize the lightbox until the reference
// image is loaded, otherwise the UX is broken.
if (!ctx.imageLoaded) {
return;
}
ctx.initialized = true;
ctx.lastFocusedElement = window.document.activeElement;
ctx.scrollDelta = 0;
ctx.pointerType = event.pointerType;
ctx.lightboxEnabled = true;
setStyles(ctx, ctx.imageRef);
ctx.scrollTopReset = window.pageYOffset || document.documentElement.scrollTop;
// In most cases, this value will be 0, but this is included
// in case a user has created a page with horizontal scrolling.
ctx.scrollLeftReset = window.pageXOffset || document.documentElement.scrollLeft;
// We define and bind the scroll callback here so
// that we can pass the context and as an argument.
// We may be able to change this in the future if we
// define the scroll callback in the store instead, but
// this approach seems to tbe clearest for now.
scrollCallback = handleScroll.bind(null, ctx);
// We need to add a scroll event listener to the window
// here because we are unable to otherwise access it via
// the Interactivity API directives. If we add a native way
// to access the window, we can remove this.
window.addEventListener('scroll', scrollCallback, false);
},
hideLightbox() {
const ctx = (0,interactivity_namespaceObject.getContext)();
ctx.hideAnimationEnabled = true;
if (ctx.lightboxEnabled) {
// We want to wait until the close animation is completed
// before allowing a user to scroll again. The duration of this
// animation is defined in the styles.scss and depends on if the
// animation is 'zoom' or 'fade', but in any case we should wait
// a few milliseconds longer than the duration, otherwise a user
// may scroll too soon and cause the animation to look sloppy.
setTimeout(function () {
window.removeEventListener('scroll', scrollCallback);
// If we don't delay before changing the focus,
// the focus ring will appear on Firefox before
// the image has finished animating, which looks broken.
ctx.lightboxTriggerRef.focus({
preventScroll: true
});
}, 450);
ctx.lightboxEnabled = false;
}
},
handleKeydown(event) {
const ctx = (0,interactivity_namespaceObject.getContext)();
if (ctx.lightboxEnabled) {
if (event.key === 'Tab' || event.keyCode === 9) {
// If shift + tab it change the direction
if (event.shiftKey && window.document.activeElement === ctx.firstFocusableElement) {
event.preventDefault();
ctx.lastFocusableElement.focus();
} else if (!event.shiftKey && window.document.activeElement === ctx.lastFocusableElement) {
event.preventDefault();
ctx.firstFocusableElement.focus();
}
}
if (event.key === 'Escape' || event.keyCode === 27) {
actions.hideLightbox(event);
}
}
},
// This is fired just by lazily loaded
// images on the page, not all images.
handleLoad() {
const ctx = (0,interactivity_namespaceObject.getContext)();
const {
ref
} = (0,interactivity_namespaceObject.getElement)();
ctx.imageLoaded = true;
ctx.imageCurrentSrc = ref.currentSrc;
callbacks.setButtonStyles();
},
handleTouchStart() {
isTouching = true;
},
handleTouchMove(event) {
const ctx = (0,interactivity_namespaceObject.getContext)();
// On mobile devices, we want to prevent triggering the
// scroll event because otherwise the page jumps around as
// we reset the scroll position. This also means that closing
// the lightbox requires that a user perform a simple tap. This
// may be changed in the future if we find a better alternative
// to override or reset the scroll position during swipe actions.
if (ctx.lightboxEnabled) {
event.preventDefault();
}
},
handleTouchEnd() {
// We need to wait a few milliseconds before resetting
// to ensure that pinch to zoom works consistently
// on mobile devices when the lightbox is open.
lastTouchTime = Date.now();
isTouching = false;
}
},
callbacks: {
initOriginImage() {
const ctx = (0,interactivity_namespaceObject.getContext)();
const {
ref
} = (0,interactivity_namespaceObject.getElement)();
ctx.imageRef = ref;
if (ref.complete) {
ctx.imageLoaded = true;
ctx.imageCurrentSrc = ref.currentSrc;
}
},
initTriggerButton() {
const ctx = (0,interactivity_namespaceObject.getContext)();
const {
ref
} = (0,interactivity_namespaceObject.getElement)();
ctx.lightboxTriggerRef = ref;
},
initLightbox() {
const ctx = (0,interactivity_namespaceObject.getContext)();
const {
ref
} = (0,interactivity_namespaceObject.getElement)();
if (ctx.lightboxEnabled) {
const focusableElements = ref.querySelectorAll(focusableSelectors);
ctx.firstFocusableElement = focusableElements[0];
ctx.lastFocusableElement = focusableElements[focusableElements.length - 1];
// Move focus to the dialog when opening it.
ref.focus();
}
},
setButtonStyles() {
const {
ref
} = (0,interactivity_namespaceObject.getElement)();
const {
naturalWidth,
naturalHeight,
offsetWidth,
offsetHeight
} = ref;
// If the image isn't loaded yet, we can't
// calculate where the button should be.
if (naturalWidth === 0 || naturalHeight === 0) {
return;
}
const figure = ref.parentElement;
const figureWidth = ref.parentElement.clientWidth;
// We need special handling for the height because
// a caption will cause the figure to be taller than
// the image, which means we need to account for that
// when calculating the placement of the button in the
// top right corner of the image.
let figureHeight = ref.parentElement.clientHeight;
const caption = figure.querySelector('figcaption');
if (caption) {
const captionComputedStyle = window.getComputedStyle(caption);
if (!['absolute', 'fixed'].includes(captionComputedStyle.position)) {
figureHeight = figureHeight - caption.offsetHeight - parseFloat(captionComputedStyle.marginTop) - parseFloat(captionComputedStyle.marginBottom);
}
}
const buttonOffsetTop = figureHeight - offsetHeight;
const buttonOffsetRight = figureWidth - offsetWidth;
const ctx = (0,interactivity_namespaceObject.getContext)();
// In the case of an image with object-fit: contain, the
// size of the <img> element can be larger than the image itself,
// so we need to calculate where to place the button.
if (ctx.scaleAttr === 'contain') {
// Natural ratio of the image.
const naturalRatio = naturalWidth / naturalHeight;
// Offset ratio of the image.
const offsetRatio = offsetWidth / offsetHeight;
if (naturalRatio >= offsetRatio) {
// If it reaches the width first, keep
// the width and compute the height.
const referenceHeight = offsetWidth / naturalRatio;
ctx.imageButtonTop = (offsetHeight - referenceHeight) / 2 + buttonOffsetTop + 16;
ctx.imageButtonRight = buttonOffsetRight + 16;
} else {
// If it reaches the height first, keep
// the height and compute the width.
const referenceWidth = offsetHeight * naturalRatio;
ctx.imageButtonTop = buttonOffsetTop + 16;
ctx.imageButtonRight = (offsetWidth - referenceWidth) / 2 + buttonOffsetRight + 16;
}
} else {
ctx.imageButtonTop = buttonOffsetTop + 16;
ctx.imageButtonRight = buttonOffsetRight + 16;
}
},
setStylesOnResize() {
const ctx = (0,interactivity_namespaceObject.getContext)();
const {
ref
} = (0,interactivity_namespaceObject.getElement)();
if (ctx.lightboxEnabled && (state.windowWidth || state.windowHeight)) {
setStyles(ctx, ref);
}
}
}
});
window.addEventListener('resize', debounce(() => {
state.windowWidth = window.innerWidth;
state.windowHeight = window.innerHeight;
}));
/**
* Computes styles for the lightbox and adds them to the document.
*
* @function
* @param {Object} ctx - Context for the `core/image` namespace.
* @param {Object} ref - The element reference.
*/
function setStyles(ctx, ref) {
// The reference img element lies adjacent
// to the event target button in the DOM.
let {
naturalWidth,
naturalHeight,
offsetWidth: originalWidth,
offsetHeight: originalHeight
} = ref;
let {
x: screenPosX,
y: screenPosY
} = ref.getBoundingClientRect();
// Natural ratio of the image clicked to open the lightbox.
const naturalRatio = naturalWidth / naturalHeight;
// Original ratio of the image clicked to open the lightbox.
let originalRatio = originalWidth / originalHeight;
// If it has object-fit: contain, recalculate the original sizes
// and the screen position without the blank spaces.
if (ctx.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(ctx.targetWidth !== 'none' ? ctx.targetWidth : naturalWidth);
let imgMaxHeight = parseFloat(ctx.targetHeight !== 'none' ? ctx.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};
--wp--lightbox-scrollbar-width: ${window.innerWidth - document.documentElement.clientWidth}px;
}
`;
}
/**
* 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);
};
}