react-native-external-keyboard/lib/module/utils/useKeyboardPress/useKeyboardPress.android.js

Toolkit for improving physical keyboard support in React Native

import { useCallback, useMemo, useRef } from 'react';
export const ANDROID_SPACE_KEY_CODE = 62;
export const ANDROID_DPAD_CENTER_CODE = 23;
export const ANDROID_ENTER_CODE = 66;
export const ANDROID_TRIGGER_CODES = [ANDROID_SPACE_KEY_CODE, ANDROID_DPAD_CENTER_CODE, ANDROID_ENTER_CODE];
const MILLISECOND_THRESHOLD = 20;
export const useKeyboardPress = ({
  onKeyUpPress,
  onKeyDownPress,
  onPressIn,
  onPressOut,
  onPress,
  onLongPress,
  triggerCodes = ANDROID_TRIGGER_CODES
}) => {
  const thresholdTime = useRef(0);
  const onKeyUpPressHandler = useCallback(e => {
    const {
      nativeEvent: {
        keyCode,
        isLongPress
      }
    } = e;
    onPressOut === null || onPressOut === void 0 || onPressOut(e);
    onKeyUpPress === null || onKeyUpPress === void 0 || onKeyUpPress(e);
    if (triggerCodes.includes(keyCode)) {
      if (isLongPress) {
        thresholdTime.current = e === null || e === void 0 ? void 0 : e.timeStamp;
        onLongPress === null || onLongPress === void 0 || onLongPress({});
      }
    }
  }, [onPressOut, onKeyUpPress, triggerCodes, onLongPress]);
  const onKeyDownPressHandler = useMemo(() => {
    if (!onPressIn) return onKeyDownPress;
    return e => {
      onKeyDownPress === null || onKeyDownPress === void 0 || onKeyDownPress(e);
      if (triggerCodes.includes(e.nativeEvent.keyCode)) {
        onPressIn === null || onPressIn === void 0 || onPressIn(e);
      }
    };
  }, [onKeyDownPress, onPressIn, triggerCodes]);
  const onPressHandler = useCallback(event => {
    const pressThreshold = ((event === null || event === void 0 ? void 0 : event.timeStamp) ?? 0) - thresholdTime.current;
    if (pressThreshold > MILLISECOND_THRESHOLD) {
      onPress === null || onPress === void 0 || onPress(event);
    }
  }, [onPress]);
  const hasHandler = onPressOut || onKeyUpPress || onLongPress || onPress;
  return {
    onKeyUpPressHandler: hasHandler && onKeyUpPressHandler,
    onKeyDownPressHandler,
    onPressHandler: onPress && onPressHandler
  };
};
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