react-native-safe-area-context/lib/commonjs/NativeSafeAreaProvider.web.js

A flexible way to handle safe area, also works on Android and web.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.NativeSafeAreaProvider = NativeSafeAreaProvider;
var React = _interopRequireWildcard(require("react"));
var _reactNative = require("react-native");
function _interopRequireWildcard(e, t) { if ("function" == typeof WeakMap) var r = new WeakMap(), n = new WeakMap(); return (_interopRequireWildcard = function (e, t) { if (!t && e && e.__esModule) return e; var o, i, f = { __proto__: null, default: e }; if (null === e || "object" != typeof e && "function" != typeof e) return f; if (o = t ? n : r) { if (o.has(e)) return o.get(e); o.set(e, f); } for (const t in e) "default" !== t && {}.hasOwnProperty.call(e, t) && ((i = (o = Object.defineProperty) && Object.getOwnPropertyDescriptor(e, t)) && (i.get || i.set) ? o(f, t, i) : f[t] = e[t]); return f; })(e, t); }
/* eslint-env browser */

/**
 * TODO:
 * Currently insets and frame are based on the window and are not
 * relative to the provider view. This is inconsistent with iOS and Android.
 * However in most cases if the provider view covers the screen this is not
 * an issue.
 */

const CSSTransitions = {
  WebkitTransition: 'webkitTransitionEnd',
  Transition: 'transitionEnd',
  MozTransition: 'transitionend',
  MSTransition: 'msTransitionEnd',
  OTransition: 'oTransitionEnd'
};
function NativeSafeAreaProvider({
  children,
  style,
  onInsetsChange
}) {
  React.useEffect(() => {
    // Skip for SSR.
    if (typeof document === 'undefined') {
      return;
    }
    const element = createContextElement();
    document.body.appendChild(element);
    const onEnd = () => {
      const {
        paddingTop,
        paddingBottom,
        paddingLeft,
        paddingRight
      } = window.getComputedStyle(element);
      const insets = {
        top: paddingTop ? parseInt(paddingTop, 10) : 0,
        bottom: paddingBottom ? parseInt(paddingBottom, 10) : 0,
        left: paddingLeft ? parseInt(paddingLeft, 10) : 0,
        right: paddingRight ? parseInt(paddingRight, 10) : 0
      };
      const frame = {
        x: 0,
        y: 0,
        width: document.documentElement.offsetWidth,
        height: document.documentElement.offsetHeight
      };
      // @ts-ignore: missing properties
      onInsetsChange({
        nativeEvent: {
          insets,
          frame
        }
      });
    };
    element.addEventListener(getSupportedTransitionEvent(), onEnd);
    onEnd();
    return () => {
      document.body.removeChild(element);
      element.removeEventListener(getSupportedTransitionEvent(), onEnd);
    };
  }, [onInsetsChange]);
  return /*#__PURE__*/React.createElement(_reactNative.View, {
    style: style
  }, children);
}
let _supportedTransitionEvent = null;
function getSupportedTransitionEvent() {
  if (_supportedTransitionEvent != null) {
    return _supportedTransitionEvent;
  }
  const element = document.createElement('invalidtype');
  _supportedTransitionEvent = CSSTransitions.Transition;
  for (const key in CSSTransitions) {
    if (element.style[key] !== undefined) {
      _supportedTransitionEvent = CSSTransitions[key];
      break;
    }
  }
  return _supportedTransitionEvent;
}
let _supportedEnv = null;
function getSupportedEnv() {
  if (_supportedEnv !== null) {
    return _supportedEnv;
  }
  const {
    CSS
  } = window;
  if (CSS && CSS.supports && CSS.supports('top: constant(safe-area-inset-top)')) {
    _supportedEnv = 'constant';
  } else {
    _supportedEnv = 'env';
  }
  return _supportedEnv;
}
function getInset(side) {
  return `${getSupportedEnv()}(safe-area-inset-${side})`;
}
function createContextElement() {
  const element = document.createElement('div');
  const {
    style
  } = element;
  style.position = 'fixed';
  style.left = '0';
  style.top = '0';
  style.width = '0';
  style.height = '0';
  style.zIndex = '-1';
  style.overflow = 'hidden';
  style.visibility = 'hidden';
  // Bacon: Anything faster than this and the callback will be invoked too early with the wrong insets
  style.transitionDuration = '0.05s';
  style.transitionProperty = 'padding';
  style.transitionDelay = '0s';
  style.paddingTop = getInset('top');
  style.paddingBottom = getInset('bottom');
  style.paddingLeft = getInset('left');
  style.paddingRight = getInset('right');
  return element;
}
//# sourceMappingURL=NativeSafeAreaProvider.web.js.map