@wordpress/block-editor/build-module/hooks/use-zoom-out.js

Generic block editor.

// packages/block-editor/src/hooks/use-zoom-out.js
import { useSelect, useDispatch } from "@wordpress/data";
import { useEffect, useRef } from "@wordpress/element";
import { store as blockEditorStore } from "../store";
import { unlock } from "../lock-unlock";
function useZoomOut(enabled = true) {
  const { setZoomLevel, resetZoomLevel } = unlock(
    useDispatch(blockEditorStore)
  );
  const { isZoomedOut, isZoomOut } = useSelect((select) => {
    const { isZoomOut: _isZoomOut } = unlock(select(blockEditorStore));
    return {
      isZoomedOut: _isZoomOut(),
      isZoomOut: _isZoomOut
    };
  }, []);
  const controlZoomLevelRef = useRef(false);
  const isEnabledRef = useRef(enabled);
  useEffect(() => {
    if (isZoomedOut !== isEnabledRef.current) {
      controlZoomLevelRef.current = false;
    }
  }, [isZoomedOut]);
  useEffect(() => {
    isEnabledRef.current = enabled;
    if (enabled !== isZoomOut()) {
      controlZoomLevelRef.current = true;
      if (enabled) {
        setZoomLevel("auto-scaled");
      } else {
        resetZoomLevel();
      }
    }
    return () => {
      if (controlZoomLevelRef.current && isZoomOut()) {
        resetZoomLevel();
      }
    };
  }, [enabled, isZoomOut, resetZoomLevel, setZoomLevel]);
}
export {
  useZoomOut
};
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