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Editing: view.js

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import * as __WEBPACK_EXTERNAL_MODULE__wordpress_interactivity_8e89b257__ from "@wordpress/interactivity";
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/******/ var __webpack_require__ = {};
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/******/ 	__webpack_require__.d = (exports, definition) => {
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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))
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
});

Editing: view.js

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