@wordpress/block-editor/build-module/components/block-list/index.js

Generic block editor.

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

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

import { AsyncModeProvider, useSelect } from '@wordpress/data';
import { useViewportMatch, useMergeRefs } from '@wordpress/compose';
/**
 * Internal dependencies
 */

import BlockListBlock from './block';
import BlockListAppender from '../block-list-appender';
import useBlockDropZone from '../use-block-drop-zone';
import { useInBetweenInserter } from './use-in-between-inserter';
import BlockTools from '../block-tools';
import { store as blockEditorStore } from '../../store';
import { usePreParsePatterns } from '../../utils/pre-parse-patterns';
import { LayoutProvider, defaultLayout } from './layout';

function Root({
  className,
  children
}) {
  const isLargeViewport = useViewportMatch('medium');
  const {
    isTyping,
    isOutlineMode,
    isFocusMode,
    isNavigationMode
  } = useSelect(select => {
    const {
      isTyping: _isTyping,
      getSettings,
      isNavigationMode: _isNavigationMode
    } = select(blockEditorStore);
    const {
      outlineMode,
      focusMode
    } = getSettings();
    return {
      isTyping: _isTyping(),
      isOutlineMode: outlineMode,
      isFocusMode: focusMode,
      isNavigationMode: _isNavigationMode()
    };
  }, []);
  return createElement("div", {
    ref: useMergeRefs([useBlockDropZone(), useInBetweenInserter()]),
    className: classnames('block-editor-block-list__layout is-root-container', className, {
      'is-typing': isTyping,
      'is-outline-mode': isOutlineMode,
      'is-focus-mode': isFocusMode && isLargeViewport,
      'is-navigate-mode': isNavigationMode
    })
  }, children);
}

export default function BlockList({
  className,
  __experimentalLayout
}) {
  usePreParsePatterns();
  return createElement(BlockTools, null, createElement(Root, {
    className: className
  }, createElement(BlockListItems, {
    __experimentalLayout: __experimentalLayout
  })));
}

function Items({
  placeholder,
  rootClientId,
  renderAppender,
  __experimentalAppenderTagName,
  __experimentalLayout: layout = defaultLayout
}) {
  function selector(select) {
    const {
      getBlockOrder,
      getSelectedBlockClientId,
      getMultiSelectedBlockClientIds,
      hasMultiSelection
    } = select(blockEditorStore);
    return {
      blockClientIds: getBlockOrder(rootClientId),
      selectedBlockClientId: getSelectedBlockClientId(),
      multiSelectedBlockClientIds: getMultiSelectedBlockClientIds(),
      hasMultiSelection: hasMultiSelection()
    };
  }

  const {
    blockClientIds,
    selectedBlockClientId,
    multiSelectedBlockClientIds,
    hasMultiSelection
  } = useSelect(selector, [rootClientId]);
  return createElement(LayoutProvider, {
    value: layout
  }, blockClientIds.map((clientId, index) => {
    const isBlockInSelection = hasMultiSelection ? multiSelectedBlockClientIds.includes(clientId) : selectedBlockClientId === clientId;
    return createElement(AsyncModeProvider, {
      key: clientId,
      value: !isBlockInSelection
    }, createElement(BlockListBlock, {
      rootClientId: rootClientId,
      clientId: clientId // This prop is explicitely computed and passed down
      // to avoid being impacted by the async mode
      // otherwise there might be a small delay to trigger the animation.
      ,
      index: index
    }));
  }), blockClientIds.length < 1 && placeholder, createElement(BlockListAppender, {
    tagName: __experimentalAppenderTagName,
    rootClientId: rootClientId,
    renderAppender: renderAppender
  }));
}

export function BlockListItems(props) {
  // This component needs to always be synchronous as it's the one changing
  // the async mode depending on the block selection.
  return createElement(AsyncModeProvider, {
    value: false
  }, createElement(Items, props));
}
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