@gechiui/block-editor/build-module/components/block-tools/insertion-point.js

Generic block editor.

import { createElement } from "@gechiui/element";

/**
 * External dependencies
 */
import classnames from 'classnames';
/**
 * GeChiUI dependencies
 */

import { useSelect, useDispatch } from '@gechiui/data';
import { useCallback, useRef, useMemo, createContext, useContext } from '@gechiui/element';
import { Popover, __unstableMotion as motion } from '@gechiui/components';
import { useReducedMotion } from '@gechiui/compose';
import { isRTL } from '@gechiui/i18n';
/**
 * Internal dependencies
 */

import Inserter from '../inserter';
import { store as blockEditorStore } from '../../store';
import { __unstableUseBlockElement as useBlockElement } from '../block-list/use-block-props/use-block-refs';
import { usePopoverScroll } from './use-popover-scroll';
export const InsertionPointOpenRef = createContext();

function InsertionPointPopover(_ref) {
  let {
    __unstablePopoverSlot,
    __unstableContentRef
  } = _ref;
  const {
    selectBlock
  } = useDispatch(blockEditorStore);
  const openRef = useContext(InsertionPointOpenRef);
  const ref = useRef();
  const {
    orientation,
    previousClientId,
    nextClientId,
    rootClientId,
    isInserterShown
  } = useSelect(select => {
    var _getBlockListSettings;

    const {
      getBlockOrder,
      getBlockListSettings,
      getBlockInsertionPoint,
      isBlockBeingDragged,
      getPreviousBlockClientId,
      getNextBlockClientId
    } = select(blockEditorStore);
    const insertionPoint = getBlockInsertionPoint();
    const order = getBlockOrder(insertionPoint.rootClientId);

    if (!order.length) {
      return {};
    }

    let _previousClientId = order[insertionPoint.index - 1];
    let _nextClientId = order[insertionPoint.index];

    while (isBlockBeingDragged(_previousClientId)) {
      _previousClientId = getPreviousBlockClientId(_previousClientId);
    }

    while (isBlockBeingDragged(_nextClientId)) {
      _nextClientId = getNextBlockClientId(_nextClientId);
    }

    return {
      previousClientId: _previousClientId,
      nextClientId: _nextClientId,
      orientation: ((_getBlockListSettings = getBlockListSettings(insertionPoint.rootClientId)) === null || _getBlockListSettings === void 0 ? void 0 : _getBlockListSettings.orientation) || 'vertical',
      rootClientId: insertionPoint.rootClientId,
      isInserterShown: insertionPoint === null || insertionPoint === void 0 ? void 0 : insertionPoint.__unstableWithInserter
    };
  }, []);
  const previousElement = useBlockElement(previousClientId);
  const nextElement = useBlockElement(nextClientId);
  const isVertical = orientation === 'vertical';
  const style = useMemo(() => {
    if (!previousElement && !nextElement) {
      return {};
    }

    const previousRect = previousElement ? previousElement.getBoundingClientRect() : null;
    const nextRect = nextElement ? nextElement.getBoundingClientRect() : null;

    if (isVertical) {
      return {
        width: previousElement ? previousElement.offsetWidth : nextElement.offsetWidth,
        height: nextRect && previousRect ? nextRect.top - previousRect.bottom : 0
      };
    }

    let width = 0;

    if (previousRect && nextRect) {
      width = isRTL() ? previousRect.left - nextRect.right : nextRect.left - previousRect.right;
    }

    return {
      width,
      height: previousElement ? previousElement.offsetHeight : nextElement.offsetHeight
    };
  }, [previousElement, nextElement]);
  const getAnchorRect = useCallback(() => {
    if (!previousElement && !nextElement) {
      return {};
    }

    const {
      ownerDocument
    } = previousElement || nextElement;
    const previousRect = previousElement ? previousElement.getBoundingClientRect() : null;
    const nextRect = nextElement ? nextElement.getBoundingClientRect() : null;

    if (isVertical) {
      if (isRTL()) {
        return {
          top: previousRect ? previousRect.bottom : nextRect.top,
          left: previousRect ? previousRect.right : nextRect.right,
          right: previousRect ? previousRect.left : nextRect.left,
          bottom: nextRect ? nextRect.top : previousRect.bottom,
          ownerDocument
        };
      }

      return {
        top: previousRect ? previousRect.bottom : nextRect.top,
        left: previousRect ? previousRect.left : nextRect.left,
        right: previousRect ? previousRect.right : nextRect.right,
        bottom: nextRect ? nextRect.top : previousRect.bottom,
        ownerDocument
      };
    }

    if (isRTL()) {
      return {
        top: previousRect ? previousRect.top : nextRect.top,
        left: previousRect ? previousRect.left : nextRect.right,
        right: nextRect ? nextRect.right : previousRect.left,
        bottom: previousRect ? previousRect.bottom : nextRect.bottom,
        ownerDocument
      };
    }

    return {
      top: previousRect ? previousRect.top : nextRect.top,
      left: previousRect ? previousRect.right : nextRect.left,
      right: nextRect ? nextRect.left : previousRect.right,
      bottom: previousRect ? previousRect.bottom : nextRect.bottom,
      ownerDocument
    };
  }, [previousElement, nextElement]);
  const popoverScrollRef = usePopoverScroll(__unstableContentRef);
  const disableMotion = useReducedMotion();
  const className = classnames('block-editor-block-list__insertion-point', 'is-' + orientation);

  function onClick(event) {
    if (event.target === ref.current && nextClientId) {
      selectBlock(nextClientId, -1);
    }
  }

  function onFocus(event) {
    // Only handle click on the wrapper specifically, and not an event
    // bubbled from the inserter itself.
    if (event.target !== ref.current) {
      openRef.current = true;
    }
  } // Only show the in-between inserter between blocks, so when there's a
  // previous and a next element.


  const showInsertionPointInserter = previousElement && nextElement && isInserterShown; // Define animation variants for the line element.

  const horizontalLine = {
    start: {
      width: 0,
      top: '50%',
      bottom: '50%',
      x: 0
    },
    rest: {
      width: 4,
      top: 0,
      bottom: 0,
      x: -2
    },
    hover: {
      width: 4,
      top: 0,
      bottom: 0,
      x: -2
    }
  };
  const verticalLine = {
    start: {
      height: 0,
      left: '50%',
      right: '50%',
      y: 0
    },
    rest: {
      height: 4,
      left: 0,
      right: 0,
      y: -2
    },
    hover: {
      height: 4,
      left: 0,
      right: 0,
      y: -2
    }
  };
  const lineVariants = {
    // Initial position starts from the center and invisible.
    start: { ...(!isVertical ? horizontalLine.start : verticalLine.start),
      opacity: 0
    },
    // The line expands to fill the container. If the inserter is visible it
    // is delayed so it appears orchestrated.
    rest: { ...(!isVertical ? horizontalLine.rest : verticalLine.rest),
      opacity: 1,
      borderRadius: '2px',
      transition: {
        delay: showInsertionPointInserter ? 0.4 : 0
      }
    },
    hover: { ...(!isVertical ? horizontalLine.hover : verticalLine.hover),
      opacity: 1,
      borderRadius: '2px',
      transition: {
        delay: 0.4
      }
    }
  };
  const inserterVariants = {
    start: {
      scale: disableMotion ? 1 : 0
    },
    rest: {
      scale: 1,
      transition: {
        delay: 0.2
      }
    }
  };
  /* eslint-disable jsx-a11y/no-static-element-interactions, jsx-a11y/click-events-have-key-events */
  // While ideally it would be enough to capture the
  // bubbling focus event from the Inserter, due to the
  // characteristics of click focusing of `button`s in
  // Firefox and Safari, it is not reliable.
  //
  // See: https://developer.mozilla.org/en-US/docs/Web/HTML/Element/button#Clicking_and_focus

  return createElement(Popover, {
    ref: popoverScrollRef,
    noArrow: true,
    animate: false,
    getAnchorRect: getAnchorRect,
    focusOnMount: false,
    className: "block-editor-block-list__insertion-point-popover" // Render in the old slot if needed for backward compatibility,
    // otherwise render in place (not in the the default popover slot).
    ,
    __unstableSlotName: __unstablePopoverSlot || null // Forces a remount of the popover when its position changes
    // This makes sure the popover doesn't animate from its previous position.
    ,
    key: nextClientId + '--' + rootClientId
  }, createElement(motion.div, {
    layout: !disableMotion,
    initial: disableMotion ? 'rest' : 'start',
    animate: "rest",
    whileHover: "hover",
    whileTap: "pressed",
    exit: "start",
    ref: ref,
    tabIndex: -1,
    onClick: onClick,
    onFocus: onFocus,
    className: classnames(className, {
      'is-with-inserter': showInsertionPointInserter
    }),
    style: style
  }, createElement(motion.div, {
    variants: lineVariants,
    className: "block-editor-block-list__insertion-point-indicator"
  }), showInsertionPointInserter && createElement(motion.div, {
    variants: inserterVariants,
    className: classnames('block-editor-block-list__insertion-point-inserter')
  }, createElement(Inserter, {
    position: "bottom center",
    clientId: nextClientId,
    rootClientId: rootClientId,
    __experimentalIsQuick: true,
    onToggle: isOpen => {
      openRef.current = isOpen;
    },
    onSelectOrClose: () => {
      openRef.current = false;
    }
  }))));
  /* eslint-enable jsx-a11y/no-static-element-interactions, jsx-a11y/click-events-have-key-events */
}

export default function InsertionPoint(_ref2) {
  let {
    children,
    __unstablePopoverSlot,
    __unstableContentRef
  } = _ref2;
  const isVisible = useSelect(select => {
    return select(blockEditorStore).isBlockInsertionPointVisible();
  }, []);
  return createElement(InsertionPointOpenRef.Provider, {
    value: useRef(false)
  }, isVisible && createElement(InsertionPointPopover, {
    __unstablePopoverSlot: __unstablePopoverSlot,
    __unstableContentRef: __unstableContentRef
  }), children);
}
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