@/utils#getBlockNodeByIdx TypeScript Examples

The following examples show how to use @/utils#getBlockNodeByIdx. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example #1
Source File: index.tsx    From easy-email with MIT License 5 votes vote down vote up 
FocusBlockLayoutProvider: React.FC = (props) => {
  const [focusBlockNode, setFocusBlockNode] = useState<HTMLElement | null>(
    null
  );
  const { initialized } = useEditorContext();
  const { focusIdx } = useFocusIdx();
  const focusIdxRef = useRefState(focusIdx);

  const root = useMemo(() => {
    return initialized ? getShadowRoot()?.querySelector(`[${DATA_RENDER_COUNT}]`) : null;
  }, [initialized]);

  useEffect(() => {
    if (!root) return;
    let lastCount: any = '0';
    const ms = new MutationObserver(() => {
      const currentCount = root.getAttribute(DATA_RENDER_COUNT);
      if (lastCount !== currentCount) {
        lastCount = currentCount;

        const ele = getBlockNodeByIdx(focusIdxRef.current);
        if (ele) {
          setFocusBlockNode(ele);
        }

      }

    });
    ms.observe(root, {
      attributeFilter: [DATA_RENDER_COUNT]
    });

    return () => {
      ms.disconnect();
    };

  }, [focusIdxRef, root]);

  useEffect(() => {
    if (!root) return;
    if (focusIdx) {
      root.setAttribute(DATA_RENDER_COUNT, (+new Date()).toString());
    }
  }, [focusIdx, root]);

  const value = useMemo(() => {
    return {
      focusBlockNode,
    };
  }, [focusBlockNode]);

  return (
    <FocusBlockLayoutContext.Provider value={value}>
      {props.children}
    </FocusBlockLayoutContext.Provider>
  );
}