rn-custom-style-sheet/lib/commonjs/Core/Hooks/UseDeviceOrientation/UseDeviceOrientationUtils.js

React Native component to select a specific value from a range of values.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.getScreenResolution = getScreenResolution;
exports.listenOrientationChange = listenOrientationChange;
exports.removeOrientationListener = removeOrientationListener;
var _reactNative = require("react-native");
var _Reducer = require("../../Reducer");
function getScreenResolution(window, withPortraitBehaviorInLandscapeMode) {
  const orientation = window.width < window.height ? _Reducer.OrientationEnum.Portrait : _Reducer.OrientationEnum.Landscape;
  const isPortrait = orientation === _Reducer.OrientationEnum.Portrait || orientation === _Reducer.OrientationEnum.Landscape && !withPortraitBehaviorInLandscapeMode;
  const windowWidth = isPortrait ? window.width : window.height;
  const windowHeight = isPortrait ? window.height : window.width;
  const shortDimension = Math.min(windowWidth, windowHeight);
  const longDimension = Math.max(windowWidth, windowHeight);
  return {
    orientation,
    screenResolution: {
      windowWidth,
      windowHeight,
      shortDimension,
      longDimension
    }
  };
}

/**
 * Event listener function that detects orientation change (every time it occurs) and triggers
 * screen rerendering. It does that, by changing the state of the screen where the function is
 * called. State changing occurs for a new state variable with the name 'orientation' that will
 * always hold the current value of the orientation after the 1st orientation change.
 * Invoke it inside the screen's constructor or in componentDidMount lifecycle method.
 * @param {object} that Screen's class component this variable. The function needs it to
 *                      invoke setState method and trigger screen rerender (this.setState()).
 */
function listenOrientationChange(withPortraitBehaviorInLandscapeMode, callback) {
  const subscription = _reactNative.Dimensions.addEventListener('change', ({
    window
  }) => {
    // Trigger screen's rerender with a state update of the orientation variable
    callback?.(getScreenResolution(window, withPortraitBehaviorInLandscapeMode));
  });
  return subscription;
}

/**
 * Wrapper function that removes orientation change listener and should be invoked in
 * componentWillUnmount lifecycle method of every class component (UI screen) that
 * listenOrientationChange function has been invoked. This should be done in order to
 * avoid adding new listeners every time the same component is re-mounted.
 */
function removeOrientationListener(subscription) {
  subscription?.remove();
}
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