docmost/apps/client/src/features/editor/components/code-block/code-block-view.tsx

import { NodeViewContent, NodeViewProps, NodeViewWrapper } from '@tiptap/react';
import { ActionIcon, CopyButton, Group, Select, Tooltip } from '@mantine/core';
import { useEffect, useState } from 'react';
import { IconCheck, IconCopy } from '@tabler/icons-react';
//import MermaidView from "@/features/editor/components/code-block/mermaid-view.tsx";
import classes from './code-block.module.css';
import React from 'react';
import { Suspense } from 'react';

const MermaidView = React.lazy(
  () => import('@/features/editor/components/code-block/mermaid-view.tsx')
);

export default function CodeBlockView(props: NodeViewProps) {
  const { node, updateAttributes, extension, editor, getPos } = props;
  const { language } = node.attrs;
  const [languageValue, setLanguageValue] = useState<string | null>(
    language || null
  );
  const [isSelected, setIsSelected] = useState(false);

  useEffect(() => {
    const updateSelection = () => {
      const { state } = editor;
      const { from, to } = state.selection;
      // Check if the selection intersects with the node's range
      const isNodeSelected =
        (from >= getPos() && from < getPos() + node.nodeSize) ||
        (to > getPos() && to <= getPos() + node.nodeSize);
      setIsSelected(isNodeSelected);
    };

    editor.on('selectionUpdate', updateSelection);
    return () => {
      editor.off('selectionUpdate', updateSelection);
    };
  }, [editor, getPos(), node.nodeSize]);

  function changeLanguage(language: string) {
    setLanguageValue(language);
    updateAttributes({
      language: language,
    });
  }

  return (
    <NodeViewWrapper className="codeBlock">
      <Group justify="flex-end" contentEditable={false}>
        <Select
          placeholder="auto"
          checkIconPosition="right"
          data={extension.options.lowlight.listLanguages()}
          value={languageValue}
          onChange={changeLanguage}
          searchable
          style={{ maxWidth: '130px' }}
          classNames={{ input: classes.selectInput }}
          disabled={!editor.isEditable}
        />

        <CopyButton value={node?.textContent} timeout={2000}>
          {({ copied, copy }) => (
            <Tooltip
              label={copied ? 'Copied' : 'Copy'}
              withArrow
              position="right"
            >
              <ActionIcon
                color={copied ? 'teal' : 'gray'}
                variant="subtle"
                onClick={copy}
              >
                {copied ? <IconCheck size={16} /> : <IconCopy size={16} />}
              </ActionIcon>
            </Tooltip>
          )}
        </CopyButton>
      </Group>

      <pre
        spellCheck="false"
        hidden={
          ((language === 'mermaid' && !editor.isEditable) ||
            (language === 'mermaid' && !isSelected)) &&
          node.textContent.length > 0
        }
      >
        <NodeViewContent as="code" className={`language-${language}`} />
      </pre>

      {language === 'mermaid' && (
        <Suspense fallback={null}>
          <MermaidView props={props} />
        </Suspense>
      )}
    </NodeViewWrapper>
  );
}