File "view.js"
Full Path: /home/ycoalition/public_html/blog/wp-includes/blocks/image/view.js
File size: 17.63 KB
MIME-type: text/x-java
Charset: utf-8
import * as __WEBPACK_EXTERNAL_MODULE__wordpress_interactivity_8e89b257__ from "@wordpress/interactivity";
/******/ // The require scope
/******/ var __webpack_require__ = {};
/******/
/************************************************************************/
/******/ /* webpack/runtime/define property getters */
/******/ (() => {
/******/ // define getter functions for harmony exports
/******/ __webpack_require__.d = (exports, definition) => {
/******/ for(var key in definition) {
/******/ if(__webpack_require__.o(definition, key) && !__webpack_require__.o(exports, key)) {
/******/ Object.defineProperty(exports, key, { enumerable: true, get: definition[key] });
/******/ }
/******/ }
/******/ };
/******/ })();
/******/
/******/ /* webpack/runtime/hasOwnProperty shorthand */
/******/ (() => {
/******/ __webpack_require__.o = (obj, prop) => (Object.prototype.hasOwnProperty.call(obj, prop))
/******/ })();
/******/
/************************************************************************/
var __webpack_exports__ = {};
;// CONCATENATED MODULE: external "@wordpress/interactivity"
var x = (y) => {
var x = {}; __webpack_require__.d(x, y); return x
}
var y = (x) => (() => (x))
const 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: ./node_modules/@wordpress/block-library/build-module/image/view.js
/**
* WordPress dependencies
*/
/**
* 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;
const {
state,
actions,
callbacks
} = (0,interactivity_namespaceObject.store)('core/image', {
state: {
currentImageId: null,
get currentImage() {
return state.metadata[state.currentImageId];
},
get overlayOpened() {
return state.currentImageId !== null;
},
get roleAttribute() {
return state.overlayOpened ? 'dialog' : null;
},
get ariaModal() {
return state.overlayOpened ? 'true' : null;
},
get enlargedSrc() {
return state.currentImage.uploadedSrc || 'data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=';
},
get figureStyles() {
return state.overlayOpened && `${state.currentImage.figureStyles?.replace(/margin[^;]*;?/g, '')};`;
},
get imgStyles() {
return state.overlayOpened && `${state.currentImage.imgStyles?.replace(/;$/, '')}; object-fit:cover;`;
},
get imageButtonRight() {
const {
imageId
} = (0,interactivity_namespaceObject.getContext)();
return state.metadata[imageId].imageButtonRight;
},
get imageButtonTop() {
const {
imageId
} = (0,interactivity_namespaceObject.getContext)();
return state.metadata[imageId].imageButtonTop;
},
get isContentHidden() {
const ctx = (0,interactivity_namespaceObject.getContext)();
return state.overlayEnabled && state.currentImageId === ctx.imageId;
},
get isContentVisible() {
const ctx = (0,interactivity_namespaceObject.getContext)();
return !state.overlayEnabled && state.currentImageId === ctx.imageId;
}
},
actions: {
showLightbox() {
const {
imageId
} = (0,interactivity_namespaceObject.getContext)();
// Bails out if the image has not loaded yet.
if (!state.metadata[imageId].imageRef?.complete) {
return;
}
// Stores the positions of the scroll to fix it until the overlay is
// closed.
state.scrollTopReset = document.documentElement.scrollTop;
state.scrollLeftReset = document.documentElement.scrollLeft;
// Sets the current expanded image in the state and enables the overlay.
state.overlayEnabled = true;
state.currentImageId = imageId;
// Computes the styles of the overlay for the animation.
callbacks.setOverlayStyles();
},
hideLightbox() {
if (state.overlayEnabled) {
// Starts the overlay closing animation. The showClosingAnimation
// class is used to avoid showing it on page load.
state.showClosingAnimation = true;
state.overlayEnabled = false;
// Waits until the close animation has completed before allowing a
// user to scroll again. The duration of this animation is defined in
// the `styles.scss` file, 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 () {
// Delays before changing the focus. Otherwise the focus ring will
// appear on Firefox before the image has finished animating, which
// looks broken.
state.currentImage.buttonRef.focus({
preventScroll: true
});
// Resets the current image id to mark the overlay as closed.
state.currentImageId = null;
}, 450);
}
},
handleKeydown(event) {
if (state.overlayEnabled) {
// Focuses the close button when the user presses the tab key.
if (event.key === 'Tab') {
event.preventDefault();
const {
ref
} = (0,interactivity_namespaceObject.getElement)();
ref.querySelector('button').focus();
}
// Closes the lightbox when the user presses the escape key.
if (event.key === 'Escape') {
actions.hideLightbox();
}
}
},
handleTouchMove(event) {
// On mobile devices, prevents triggering the scroll event because
// otherwise the page jumps around when it resets 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 there is a
// better alternative to override or reset the scroll position during
// swipe actions.
if (state.overlayEnabled) {
event.preventDefault();
}
},
handleTouchStart() {
isTouching = true;
},
handleTouchEnd() {
// Waits 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;
},
handleScroll() {
// Prevents scrolling behaviors that trigger content shift while the
// lightbox is open. It would be better to accomplish through CSS alone,
// but using overflow: hidden is currently the only way to do so and
// that causes a layout to shift and prevents the zoom animation from
// working in some cases because it's not possible to account for the
// layout shift when doing the animation calculations. Instead, it uses
// JavaScript to prevent and reset the scrolling behavior.
if (state.overlayOpened) {
// Avoids overriding the scroll behavior on mobile devices because
// doing so breaks the pinch to zoom functionality, and users should
// be able to zoom in further on the high-res image.
if (!isTouching && Date.now() - lastTouchTime > 450) {
// It doesn't rely on `event.preventDefault()` to prevent scrolling
// because the scroll event can't be canceled, so it resets the
// position instead.
window.scrollTo(state.scrollLeftReset, state.scrollTopReset);
}
}
}
},
callbacks: {
setOverlayStyles() {
if (!state.overlayEnabled) {
return;
}
let {
naturalWidth,
naturalHeight,
offsetWidth: originalWidth,
offsetHeight: originalHeight
} = state.currentImage.imageRef;
let {
x: screenPosX,
y: screenPosY
} = state.currentImage.imageRef.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, recalculates the original sizes
// and the screen position without the blank spaces.
if (state.currentImage.scaleAttr === 'contain') {
if (naturalRatio > originalRatio) {
const heightWithoutSpace = originalWidth / naturalRatio;
// Recalculates screen position without the top space.
screenPosY += (originalHeight - heightWithoutSpace) / 2;
originalHeight = heightWithoutSpace;
} else {
const widthWithoutSpace = originalHeight * naturalRatio;
// Recalculates screen position without the left space.
screenPosX += (originalWidth - widthWithoutSpace) / 2;
originalWidth = widthWithoutSpace;
}
}
originalRatio = originalWidth / originalHeight;
// Typically, it uses 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(state.currentImage.targetWidth !== 'none' ? state.currentImage.targetWidth : naturalWidth);
let imgMaxHeight = parseFloat(state.currentImage.targetHeight !== 'none' ? state.currentImage.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;
// Checks if the target image has a different ratio than the original
// one (thumbnail). Recalculates the width and height.
if (naturalRatio.toFixed(2) !== imgRatio.toFixed(2)) {
if (naturalRatio > imgRatio) {
// If the width is reached before the height, it keeps the maxWidth
// and recalculates the height unless the difference between the
// maxHeight and the reducedHeight is higher than the maxWidth,
// where it keeps 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, it keeps the maxHeight
// and recalculate the width unlesss the difference between the
// maxWidth and the reducedWidth is higher than the maxHeight, where
// it keeps 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;
// Calculates 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, it keeps that size.
if (originalWidth > containerWidth || originalHeight > containerHeight) {
containerWidth = originalWidth;
containerHeight = originalHeight;
}
// Calculates 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);
// 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.
state.overlayStyles = `
: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;
}
`;
},
setButtonStyles() {
const {
imageId
} = (0,interactivity_namespaceObject.getContext)();
const {
ref
} = (0,interactivity_namespaceObject.getElement)();
state.metadata[imageId].imageRef = ref;
state.metadata[imageId].currentSrc = ref.currentSrc;
const {
naturalWidth,
naturalHeight,
offsetWidth,
offsetHeight
} = ref;
// If the image isn't loaded yet, it can't calculate where the button
// should be.
if (naturalWidth === 0 || naturalHeight === 0) {
return;
}
const figure = ref.parentElement;
const figureWidth = ref.parentElement.clientWidth;
// It needs special handling for the height because a caption will cause
// the figure to be taller than the image, which means it needs 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;
let imageButtonTop = buttonOffsetTop + 16;
let imageButtonRight = buttonOffsetRight + 16;
// In the case of an image with object-fit: contain, the size of the
// <img> element can be larger than the image itself, so it needs to
// calculate where to place the button.
if (state.metadata[imageId].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, it keeps the width and compute the
// height.
const referenceHeight = offsetWidth / naturalRatio;
imageButtonTop = (offsetHeight - referenceHeight) / 2 + buttonOffsetTop + 16;
imageButtonRight = buttonOffsetRight + 16;
} else {
// If it reaches the height first, it keeps the height and compute
// the width.
const referenceWidth = offsetHeight * naturalRatio;
imageButtonTop = buttonOffsetTop + 16;
imageButtonRight = (offsetWidth - referenceWidth) / 2 + buttonOffsetRight + 16;
}
}
state.metadata[imageId].imageButtonTop = imageButtonTop;
state.metadata[imageId].imageButtonRight = imageButtonRight;
},
setOverlayFocus() {
if (state.overlayEnabled) {
// Moves the focus to the dialog when it opens.
const {
ref
} = (0,interactivity_namespaceObject.getElement)();
ref.focus();
}
},
initTriggerButton() {
const {
imageId
} = (0,interactivity_namespaceObject.getContext)();
const {
ref
} = (0,interactivity_namespaceObject.getElement)();
state.metadata[imageId].buttonRef = ref;
}
}
}, {
lock: true
});