Function useCompletion

packages/cli/src/ui/hooks/useCompletion.ts:33–129

()

}

export function useCompletion(): UseCompletionReturn {
  const [suggestions, setSuggestions] = useState<Suggestion[]>([]);
  const [activeSuggestionIndex, setActiveSuggestionIndex] =
    useState<number>(-1);
  const [visibleStartIndex, setVisibleStartIndex] = useState<number>(0);
  const [showSuggestions, setShowSuggestions] = useState<boolean>(false);
  const [isLoadingSuggestions, setIsLoadingSuggestions] =
    useState<boolean>(false);
  const [isPerfectMatch, setIsPerfectMatch] = useState<boolean>(false);

  const resetCompletionState = useCallback(() => {
    setSuggestions([]);
    setActiveSuggestionIndex(-1);
    setVisibleStartIndex(0);
    setShowSuggestions(false);
    setIsLoadingSuggestions(false);
    setIsPerfectMatch(false);
  }, []);

  const navigateUp = useCallback(() => {
    if (suggestions.length === 0) return;

    setActiveSuggestionIndex((prevActiveIndex) => {
      // Calculate new active index, handling wrap-around
      const newActiveIndex =
        prevActiveIndex <= 0 ? suggestions.length - 1 : prevActiveIndex - 1;

      // Adjust scroll position based on the new active index
      setVisibleStartIndex((prevVisibleStart) => {
        // Case 1: Wrapped around to the last item
        if (
          newActiveIndex === suggestions.length - 1 &&
          suggestions.length > MAX_SUGGESTIONS_TO_SHOW
        ) {
          return Math.max(0, suggestions.length - MAX_SUGGESTIONS_TO_SHOW);
        }
        // Case 2: Scrolled above the current visible window
        if (newActiveIndex < prevVisibleStart) {
          return newActiveIndex;
        }
        // Otherwise, keep the current scroll position
        return prevVisibleStart;
      });

      return newActiveIndex;
    });
  }, [suggestions.length]);

  const navigateDown = useCallback(() => {
    if (suggestions.length === 0) return;

    setActiveSuggestionIndex((prevActiveIndex) => {
      // Calculate new active index, handling wrap-around
      const newActiveIndex =
        prevActiveIndex >= suggestions.length - 1 ? 0 : prevActiveIndex + 1;

      // Adjust scroll position based on the new active index
      setVisibleStartIndex((prevVisibleStart) => {