text: import React, { useState, useMemo, useEffect } from 'react';
  import classnames from 'classnames';
  
  var styles = {"test":"_styles-module__test__3ybTi"};
  
  function createCommonjsModule(fn, module) {
  	return module = { exports: {} }, fn(module, module.exports), module.exports;
  }
  
  /** @license React v16.13.1
   * react-is.production.min.js
   *
   * Copyright (c) Facebook, Inc. and its affiliates.
   *
   * This source code is licensed under the MIT license found in the
   * LICENSE file in the root directory of this source tree.
   */
  var b="function"===typeof Symbol&&Symbol.for,c=b?Symbol.for("react.element"):60103,d=b?Symbol.for("react.portal"):60106,e=b?Symbol.for("react.fragment"):60107,f=b?Symbol.for("react.strict_mode"):60108,g=b?Symbol.for("react.profiler"):60114,h=b?Symbol.for("react.provider"):60109,k=b?Symbol.for("react.context"):60110,l=b?Symbol.for("react.async_mode"):60111,m=b?Symbol.for("react.concurrent_mode"):60111,n=b?Symbol.for("react.forward_ref"):60112,p=b?Symbol.for("react.suspense"):60113,q=b?
  Symbol.for("react.suspense_list"):60120,r=b?Symbol.for("react.memo"):60115,t=b?Symbol.for("react.lazy"):60116,v=b?Symbol.for("react.block"):60121,w=b?Symbol.for("react.fundamental"):60117,x=b?Symbol.for("react.responder"):60118,y=b?Symbol.for("react.scope"):60119;
  function z(a){if("object"===typeof a&&null!==a){var u=a.$$typeof;switch(u){case c:switch(a=a.type,a){case l:case m:case e:case g:case f:case p:return a;default:switch(a=a&&a.$$typeof,a){case k:case n:case t:case r:case h:return a;default:return u}}case d:return u}}}function A(a){return z(a)===m}var AsyncMode=l;var ConcurrentMode=m;var ContextConsumer=k;var ContextProvider=h;var Element=c;var ForwardRef=n;var Fragment=e;var Lazy=t;var Memo=r;var Portal=d;
  var Profiler=g;var StrictMode=f;var Suspense=p;var isAsyncMode=function(a){return A(a)||z(a)===l};var isConcurrentMode=A;var isContextConsumer=function(a){return z(a)===k};var isContextProvider=function(a){return z(a)===h};var isElement=function(a){return "object"===typeof a&&null!==a&&a.$$typeof===c};var isForwardRef=function(a){return z(a)===n};var isFragment=function(a){return z(a)===e};var isLazy=function(a){return z(a)===t};
  var isMemo=function(a){return z(a)===r};var isPortal=function(a){return z(a)===d};var isProfiler=function(a){return z(a)===g};var isStrictMode=function(a){return z(a)===f};var isSuspense=function(a){return z(a)===p};
  var isValidElementType=function(a){return "string"===typeof a||"function"===typeof a||a===e||a===m||a===g||a===f||a===p||a===q||"object"===typeof a&&null!==a&&(a.$$typeof===t||a.$$typeof===r||a.$$typeof===h||a.$$typeof===k||a.$$typeof===n||a.$$typeof===w||a.$$typeof===x||a.$$typeof===y||a.$$typeof===v)};var typeOf=z;
  
  var reactIs_production_min = {
  	AsyncMode: AsyncMode,
  	ConcurrentMode: ConcurrentMode,
  	ContextConsumer: ContextConsumer,
  	ContextProvider: ContextProvider,
  	Element: Element,
  	ForwardRef: ForwardRef,
  	Fragment: Fragment,
  	Lazy: Lazy,
  	Memo: Memo,
  	Portal: Portal,
  	Profiler: Profiler,
  	StrictMode: StrictMode,
  	Suspense: Suspense,
  	isAsyncMode: isAsyncMode,
  	isConcurrentMode: isConcurrentMode,
  	isContextConsumer: isContextConsumer,
  	isContextProvider: isContextProvider,
  	isElement: isElement,
  	isForwardRef: isForwardRef,
  	isFragment: isFragment,
  	isLazy: isLazy,
  	isMemo: isMemo,
  	isPortal: isPortal,
  	isProfiler: isProfiler,
  	isStrictMode: isStrictMode,
  	isSuspense: isSuspense,
  	isValidElementType: isValidElementType,
  	typeOf: typeOf
  };
  
  var reactIs_development = createCommonjsModule(function (module, exports) {
  
  
  
  if (process.env.NODE_ENV !== "production") {
    (function() {
  
  // The Symbol used to tag the ReactElement-like types. If there is no native Symbol
  // nor polyfill, then a plain number is used for performance.
  var hasSymbol = typeof Symbol === 'function' && Symbol.for;
  var REACT_ELEMENT_TYPE = hasSymbol ? Symbol.for('react.element') : 0xeac7;
  var REACT_PORTAL_TYPE = hasSymbol ? Symbol.for('react.portal') : 0xeaca;
  var REACT_FRAGMENT_TYPE = hasSymbol ? Symbol.for('react.fragment') : 0xeacb;
  var REACT_STRICT_MODE_TYPE = hasSymbol ? Symbol.for('react.strict_mode') : 0xeacc;
  var REACT_PROFILER_TYPE = hasSymbol ? Symbol.for('react.profiler') : 0xead2;
  var REACT_PROVIDER_TYPE = hasSymbol ? Symbol.for('react.provider') : 0xeacd;
  var REACT_CONTEXT_TYPE = hasSymbol ? Symbol.for('react.context') : 0xeace; // TODO: We don't use AsyncMode or ConcurrentMode anymore. They were temporary
  // (unstable) APIs that have been removed. Can we remove the symbols?
  
  var REACT_ASYNC_MODE_TYPE = hasSymbol ? Symbol.for('react.async_mode') : 0xeacf;
  var REACT_CONCURRENT_MODE_TYPE = hasSymbol ? Symbol.for('react.concurrent_mode') : 0xeacf;
  var REACT_FORWARD_REF_TYPE = hasSymbol ? Symbol.for('react.forward_ref') : 0xead0;
  var REACT_SUSPENSE_TYPE = hasSymbol ? Symbol.for('react.suspense') : 0xead1;
  var REACT_SUSPENSE_LIST_TYPE = hasSymbol ? Symbol.for('react.suspense_list') : 0xead8;
  var REACT_MEMO_TYPE = hasSymbol ? Symbol.for('react.memo') : 0xead3;
  var REACT_LAZY_TYPE = hasSymbol ? Symbol.for('react.lazy') : 0xead4;
  var REACT_BLOCK_TYPE = hasSymbol ? Symbol.for('react.block') : 0xead9;
  var REACT_FUNDAMENTAL_TYPE = hasSymbol ? Symbol.for('react.fundamental') : 0xead5;
  var REACT_RESPONDER_TYPE = hasSymbol ? Symbol.for('react.responder') : 0xead6;
  var REACT_SCOPE_TYPE = hasSymbol ? Symbol.for('react.scope') : 0xead7;
  
  function isValidElementType(type) {
    return typeof type === 'string' || typeof type === 'function' || // Note: its typeof might be other than 'symbol' or 'number' if it's a polyfill.
    type === REACT_FRAGMENT_TYPE || type === REACT_CONCURRENT_MODE_TYPE || type === REACT_PROFILER_TYPE || type === REACT_STRICT_MODE_TYPE || type === REACT_SUSPENSE_TYPE || type === REACT_SUSPENSE_LIST_TYPE || typeof type === 'object' && type !== null && (type.$$typeof === REACT_LAZY_TYPE || type.$$typeof === REACT_MEMO_TYPE || type.$$typeof === REACT_PROVIDER_TYPE || type.$$typeof === REACT_CONTEXT_TYPE || type.$$typeof === REACT_FORWARD_REF_TYPE || type.$$typeof === REACT_FUNDAMENTAL_TYPE || type.$$typeof === REACT_RESPONDER_TYPE || type.$$typeof === REACT_SCOPE_TYPE || type.$$typeof === REACT_BLOCK_TYPE);
  }
  
  function typeOf(object) {
    if (typeof object === 'object' && object !== null) {
      var $$typeof = object.$$typeof;
  
      switch ($$typeof) {
        case REACT_ELEMENT_TYPE:
          var type = object.type;
  
          switch (type) {
            case REACT_ASYNC_MODE_TYPE:
            case REACT_CONCURRENT_MODE_TYPE:
            case REACT_FRAGMENT_TYPE:
            case REACT_PROFILER_TYPE:
            case REACT_STRICT_MODE_TYPE:
            case REACT_SUSPENSE_TYPE:
              return type;
  
            default:
              var $$typeofType = type && type.$$typeof;
  
              switch ($$typeofType) {
                case REACT_CONTEXT_TYPE:
                case REACT_FORWARD_REF_TYPE:
                case REACT_LAZY_TYPE:
                case REACT_MEMO_TYPE:
                case REACT_PROVIDER_TYPE:
                  return $$typeofType;
  
                default:
                  return $$typeof;
              }
  
          }
  
        case REACT_PORTAL_TYPE:
          return $$typeof;
      }
    }
  
    return undefined;
  } // AsyncMode is deprecated along with isAsyncMode
  
  var AsyncMode = REACT_ASYNC_MODE_TYPE;
  var ConcurrentMode = REACT_CONCURRENT_MODE_TYPE;
  var ContextConsumer = REACT_CONTEXT_TYPE;
  var ContextProvider = REACT_PROVIDER_TYPE;
  var Element = REACT_ELEMENT_TYPE;
  var ForwardRef = REACT_FORWARD_REF_TYPE;
  var Fragment = REACT_FRAGMENT_TYPE;
  var Lazy = REACT_LAZY_TYPE;
  var Memo = REACT_MEMO_TYPE;
  var Portal = REACT_PORTAL_TYPE;
  var Profiler = REACT_PROFILER_TYPE;
  var StrictMode = REACT_STRICT_MODE_TYPE;
  var Suspense = REACT_SUSPENSE_TYPE;
  var hasWarnedAboutDeprecatedIsAsyncMode = false; // AsyncMode should be deprecated
  
  function isAsyncMode(object) {
    {
      if (!hasWarnedAboutDeprecatedIsAsyncMode) {
        hasWarnedAboutDeprecatedIsAsyncMode = true; // Using console['warn'] to evade Babel and ESLint
  
        console['warn']('The ReactIs.isAsyncMode() alias has been deprecated, ' + 'and will be removed in React 17+. Update your code to use ' + 'ReactIs.isConcurrentMode() instead. It has the exact same API.');
      }
    }
  
    return isConcurrentMode(object) || typeOf(object) === REACT_ASYNC_MODE_TYPE;
  }
  function isConcurrentMode(object) {
    return typeOf(object) === REACT_CONCURRENT_MODE_TYPE;
  }
  function isContextConsumer(object) {
    return typeOf(object) === REACT_CONTEXT_TYPE;
  }
  function isContextProvider(object) {
    return typeOf(object) === REACT_PROVIDER_TYPE;
  }
  function isElement(object) {
    return typeof object === 'object' && object !== null && object.$$typeof === REACT_ELEMENT_TYPE;
  }
  function isForwardRef(object) {
    return typeOf(object) === REACT_FORWARD_REF_TYPE;
  }
  function isFragment(object) {
    return typeOf(object) === REACT_FRAGMENT_TYPE;
  }
  function isLazy(object) {
    return typeOf(object) === REACT_LAZY_TYPE;
  }
  function isMemo(object) {
    return typeOf(object) === REACT_MEMO_TYPE;
  }
  function isPortal(object) {
    return typeOf(object) === REACT_PORTAL_TYPE;
  }
  function isProfiler(object) {
    return typeOf(object) === REACT_PROFILER_TYPE;
  }
  function isStrictMode(object) {
    return typeOf(object) === REACT_STRICT_MODE_TYPE;
  }
  function isSuspense(object) {
    return typeOf(object) === REACT_SUSPENSE_TYPE;
  }
  
  exports.AsyncMode = AsyncMode;
  exports.ConcurrentMode = ConcurrentMode;
  exports.ContextConsumer = ContextConsumer;
  exports.ContextProvider = ContextProvider;
  exports.Element = Element;
  exports.ForwardRef = ForwardRef;
  exports.Fragment = Fragment;
  exports.Lazy = Lazy;
  exports.Memo = Memo;
  exports.Portal = Portal;
  exports.Profiler = Profiler;
  exports.StrictMode = StrictMode;
  exports.Suspense = Suspense;
  exports.isAsyncMode = isAsyncMode;
  exports.isConcurrentMode = isConcurrentMode;
  exports.isContextConsumer = isContextConsumer;
  exports.isContextProvider = isContextProvider;
  exports.isElement = isElement;
  exports.isForwardRef = isForwardRef;
  exports.isFragment = isFragment;
  exports.isLazy = isLazy;
  exports.isMemo = isMemo;
  exports.isPortal = isPortal;
  exports.isProfiler = isProfiler;
  exports.isStrictMode = isStrictMode;
  exports.isSuspense = isSuspense;
  exports.isValidElementType = isValidElementType;
  exports.typeOf = typeOf;
    })();
  }
  });
  
  var reactIs = createCommonjsModule(function (module) {
  
  if (process.env.NODE_ENV === 'production') {
    module.exports = reactIs_production_min;
  } else {
    module.exports = reactIs_development;
  }
  });
  
  /*
  object-assign
  (c) Sindre Sorhus
  @license MIT
  */
  /* eslint-disable no-unused-vars */
  var getOwnPropertySymbols = Object.getOwnPropertySymbols;
  var hasOwnProperty = Object.prototype.hasOwnProperty;
  var propIsEnumerable = Object.prototype.propertyIsEnumerable;
  
  function toObject(val) {
  	if (val === null || val === undefined) {
  		throw new TypeError('Object.assign cannot be called with null or undefined');
  	}
  
  	return Object(val);
  }
  
  function shouldUseNative() {
  	try {
  		if (!Object.assign) {
  			return false;
  		}
  
  		// Detect buggy property enumeration order in older V8 versions.
  
  		// https://bugs.chromium.org/p/v8/issues/detail?id=4118
  		var test1 = new String('abc');  // eslint-disable-line no-new-wrappers
  		test1[5] = 'de';
  		if (Object.getOwnPropertyNames(test1)[0] === '5') {
  			return false;
  		}
  
  		// https://bugs.chromium.org/p/v8/issues/detail?id=3056
  		var test2 = {};
  		for (var i = 0; i < 10; i++) {
  			test2['_' + String.fromCharCode(i)] = i;
  		}
  		var order2 = Object.getOwnPropertyNames(test2).map(function (n) {
  			return test2[n];
  		});
  		if (order2.join('') !== '0123456789') {
  			return false;
  		}
  
  		// https://bugs.chromium.org/p/v8/issues/detail?id=3056
  		var test3 = {};
  		'abcdefghijklmnopqrst'.split('').forEach(function (letter) {
  			test3[letter] = letter;
  		});
  		if (Object.keys(Object.assign({}, test3)).join('') !==
  				'abcdefghijklmnopqrst') {
  			return false;
  		}
  
  		return true;
  	} catch (err) {
  		// We don't expect any of the above to throw, but better to be safe.
  		return false;
  	}
  }
  
  var objectAssign = shouldUseNative() ? Object.assign : function (target, source) {
  	var from;
  	var to = toObject(target);
  	var symbols;
  
  	for (var s = 1; s < arguments.length; s++) {
  		from = Object(arguments[s]);
  
  		for (var key in from) {
  			if (hasOwnProperty.call(from, key)) {
  				to[key] = from[key];
  			}
  		}
  
  		if (getOwnPropertySymbols) {
  			symbols = getOwnPropertySymbols(from);
  			for (var i = 0; i < symbols.length; i++) {
  				if (propIsEnumerable.call(from, symbols[i])) {
  					to[symbols[i]] = from[symbols[i]];
  				}
  			}
  		}
  	}
  
  	return to;
  };
  
  /**
   * Copyright (c) 2013-present, Facebook, Inc.
   *
   * This source code is licensed under the MIT license found in the
   * LICENSE file in the root directory of this source tree.
   */
  
  var ReactPropTypesSecret = 'SECRET_DO_NOT_PASS_THIS_OR_YOU_WILL_BE_FIRED';
  
  var ReactPropTypesSecret_1 = ReactPropTypesSecret;
  
  var printWarning = function() {};
  
  if (process.env.NODE_ENV !== 'production') {
    var ReactPropTypesSecret$1 = ReactPropTypesSecret_1;
    var loggedTypeFailures = {};
    var has = Function.call.bind(Object.prototype.hasOwnProperty);
  
    printWarning = function(text) {
      var message = 'Warning: ' + text;
      if (typeof console !== 'undefined') {
        console.error(message);
      }
      try {
        // --- Welcome to debugging React ---
        // This error was thrown as a convenience so that you can use this stack
        // to find the callsite that caused this warning to fire.
        throw new Error(message);
      } catch (x) {}
    };
  }
  
  /**
   * Assert that the values match with the type specs.
   * Error messages are memorized and will only be shown once.
   *
   * @param {object} typeSpecs Map of name to a ReactPropType
   * @param {object} values Runtime values that need to be type-checked
   * @param {string} location e.g. "prop", "context", "child context"
   * @param {string} componentName Name of the component for error messages.
   * @param {?Function} getStack Returns the component stack.
   * @private
   */
  function checkPropTypes(typeSpecs, values, location, componentName, getStack) {
    if (process.env.NODE_ENV !== 'production') {
      for (var typeSpecName in typeSpecs) {
        if (has(typeSpecs, typeSpecName)) {
          var error;
          // Prop type validation may throw. In case they do, we don't want to
          // fail the render phase where it didn't fail before. So we log it.
          // After these have been cleaned up, we'll let them throw.
          try {
            // This is intentionally an invariant that gets caught. It's the same
            // behavior as without this statement except with a better message.
            if (typeof typeSpecs[typeSpecName] !== 'function') {
              var err = Error(
                (componentName || 'React class') + ': ' + location + ' type `' + typeSpecName + '` is invalid; ' +
                'it must be a function, usually from the `prop-types` package, but received `' + typeof typeSpecs[typeSpecName] + '`.'
              );
              err.name = 'Invariant Violation';
              throw err;
            }
            error = typeSpecs[typeSpecName](values, typeSpecName, componentName, location, null, ReactPropTypesSecret$1);
          } catch (ex) {
            error = ex;
          }
          if (error && !(error instanceof Error)) {
            printWarning(
              (componentName || 'React class') + ': type specification of ' +
              location + ' `' + typeSpecName + '` is invalid; the type checker ' +
              'function must return `null` or an `Error` but returned a ' + typeof error + '. ' +
              'You may have forgotten to pass an argument to the type checker ' +
              'creator (arrayOf, instanceOf, objectOf, oneOf, oneOfType, and ' +
              'shape all require an argument).'
            );
          }
          if (error instanceof Error && !(error.message in loggedTypeFailures)) {
            // Only monitor this failure once because there tends to be a lot of the
            // same error.
            loggedTypeFailures[error.message] = true;
  
            var stack = getStack ? getStack() : '';
  
            printWarning(
              'Failed ' + location + ' type: ' + error.message + (stack != null ? stack : '')
            );
          }
        }
      }
    }
  }
  
  /**
   * Resets warning cache when testing.
   *
   * @private
   */
  checkPropTypes.resetWarningCache = function() {
    if (process.env.NODE_ENV !== 'production') {
      loggedTypeFailures = {};
    }
  };
  
  var checkPropTypes_1 = checkPropTypes;
  
  var has$1 = Function.call.bind(Object.prototype.hasOwnProperty);
  var printWarning$1 = function() {};
  
  if (process.env.NODE_ENV !== 'production') {
    printWarning$1 = function(text) {
      var message = 'Warning: ' + text;
      if (typeof console !== 'undefined') {
        console.error(message);
      }
      try {
        // --- Welcome to debugging React ---
        // This error was thrown as a convenience so that you can use this stack
        // to find the callsite that caused this warning to fire.
        throw new Error(message);
      } catch (x) {}
    };
  }
  
  function emptyFunctionThatReturnsNull() {
    return null;
  }
  
  var factoryWithTypeCheckers = function(isValidElement, throwOnDirectAccess) {
    /* global Symbol */
    var ITERATOR_SYMBOL = typeof Symbol === 'function' && Symbol.iterator;
    var FAUX_ITERATOR_SYMBOL = '@@iterator'; // Before Symbol spec.
  
    /**
     * Returns the iterator method function contained on the iterable object.
     *
     * Be sure to invoke the function with the iterable as context:
     *
     *     var iteratorFn = getIteratorFn(myIterable);
     *     if (iteratorFn) {
     *       var iterator = iteratorFn.call(myIterable);
     *       ...
     *     }
     *
     * @param {?object} maybeIterable
     * @return {?function}
     */
    function getIteratorFn(maybeIterable) {
      var iteratorFn = maybeIterable && (ITERATOR_SYMBOL && maybeIterable[ITERATOR_SYMBOL] || maybeIterable[FAUX_ITERATOR_SYMBOL]);
      if (typeof iteratorFn === 'function') {
        return iteratorFn;
      }
    }
  
    /**
     * Collection of methods that allow declaration and validation of props that are
     * supplied to React components. Example usage:
     *
     *   var Props = require('ReactPropTypes');
     *   var MyArticle = React.createClass({
     *     propTypes: {
     *       // An optional string prop named "description".
     *       description: Props.string,
     *
     *       // A required enum prop named "category".
     *       category: Props.oneOf(['News','Photos']).isRequired,
     *
     *       // A prop named "dialog" that requires an instance of Dialog.
     *       dialog: Props.instanceOf(Dialog).isRequired
     *     },
     *     render: function() { ... }
     *   });
     *
     * A more formal specification of how these methods are used:
     *
     *   type := array|bool|func|object|number|string|oneOf([...])|instanceOf(...)
     *   decl := ReactPropTypes.{type}(.isRequired)?
     *
     * Each and every declaration produces a function with the same signature. This
     * allows the creation of custom validation functions. For example:
     *
     *  var MyLink = React.createClass({
     *    propTypes: {
     *      // An optional string or URI prop named "href".
     *      href: function(props, propName, componentName) {
     *        var propValue = props[propName];
     *        if (propValue != null && typeof propValue !== 'string' &&
     *            !(propValue instanceof URI)) {
     *          return new Error(
     *            'Expected a string or an URI for ' + propName + ' in ' +
     *            componentName
     *          );
     *        }
     *      }
     *    },
     *    render: function() {...}
     *  });
     *
     * @internal
     */
  
    var ANONYMOUS = '<<anonymous>>';
  
    // Important!
    // Keep this list in sync with production version in `./factoryWithThrowingShims.js`.
    var ReactPropTypes = {
      array: createPrimitiveTypeChecker('array'),
      bool: createPrimitiveTypeChecker('boolean'),
      func: createPrimitiveTypeChecker('function'),
      number: createPrimitiveTypeChecker('number'),
      object: createPrimitiveTypeChecker('object'),
      string: createPrimitiveTypeChecker('string'),
      symbol: createPrimitiveTypeChecker('symbol'),
  
      any: createAnyTypeChecker(),
      arrayOf: createArrayOfTypeChecker,
      element: createElementTypeChecker(),
      elementType: createElementTypeTypeChecker(),
      instanceOf: createInstanceTypeChecker,
      node: createNodeChecker(),
      objectOf: createObjectOfTypeChecker,
      oneOf: createEnumTypeChecker,
      oneOfType: createUnionTypeChecker,
      shape: createShapeTypeChecker,
      exact: createStrictShapeTypeChecker,
    };
  
    /**
     * inlined Object.is polyfill to avoid requiring consumers ship their own
     * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/is
     */
    /*eslint-disable no-self-compare*/
    function is(x, y) {
      // SameValue algorithm
      if (x === y) {
        // Steps 1-5, 7-10
        // Steps 6.b-6.e: +0 != -0
        return x !== 0 || 1 / x === 1 / y;
      } else {
        // Step 6.a: NaN == NaN
        return x !== x && y !== y;
      }
    }
    /*eslint-enable no-self-compare*/
  
    /**
     * We use an Error-like object for backward compatibility as people may call
     * PropTypes directly and inspect their output. However, we don't use real
     * Errors anymore. We don't inspect their stack anyway, and creating them
     * is prohibitively expensive if they are created too often, such as what
     * happens in oneOfType() for any type before the one that matched.
     */
    function PropTypeError(message) {
      this.message = message;
      this.stack = '';
    }
    // Make `instanceof Error` still work for returned errors.
    PropTypeError.prototype = Error.prototype;
  
    function createChainableTypeChecker(validate) {
      if (process.env.NODE_ENV !== 'production') {
        var manualPropTypeCallCache = {};
        var manualPropTypeWarningCount = 0;
      }
      function checkType(isRequired, props, propName, componentName, location, propFullName, secret) {
        componentName = componentName || ANONYMOUS;
        propFullName = propFullName || propName;
  
        if (secret !== ReactPropTypesSecret_1) {
          if (throwOnDirectAccess) {
            // New behavior only for users of `prop-types` package
            var err = new Error(
              'Calling PropTypes validators directly is not supported by the `prop-types` package. ' +
              'Use `PropTypes.checkPropTypes()` to call them. ' +
              'Read more at http://fb.me/use-check-prop-types'
            );
            err.name = 'Invariant Violation';
            throw err;
          } else if (process.env.NODE_ENV !== 'production' && typeof console !== 'undefined') {
            // Old behavior for people using React.PropTypes
            var cacheKey = componentName + ':' + propName;
            if (
              !manualPropTypeCallCache[cacheKey] &&
              // Avoid spamming the console because they are often not actionable except for lib authors
              manualPropTypeWarningCount < 3
            ) {
              printWarning$1(
                'You are manually calling a React.PropTypes validation ' +
                'function for the `' + propFullName + '` prop on `' + componentName  + '`. This is deprecated ' +
                'and will throw in the standalone `prop-types` package. ' +
                'You may be seeing this warning due to a third-party PropTypes ' +
                'library. See https://fb.me/react-warning-dont-call-proptypes ' + 'for details.'
              );
              manualPropTypeCallCache[cacheKey] = true;
              manualPropTypeWarningCount++;
            }
          }
        }
        if (props[propName] == null) {
          if (isRequired) {
            if (props[propName] === null) {
              return new PropTypeError('The ' + location + ' `' + propFullName + '` is marked as required ' + ('in `' + componentName + '`, but its value is `null`.'));
            }
            return new PropTypeError('The ' + location + ' `' + propFullName + '` is marked as required in ' + ('`' + componentName + '`, but its value is `undefined`.'));
          }
          return null;
        } else {
          return validate(props, propName, componentName, location, propFullName);
        }
      }
  
      var chainedCheckType = checkType.bind(null, false);
      chainedCheckType.isRequired = checkType.bind(null, true);
  
      return chainedCheckType;
    }
  
    function createPrimitiveTypeChecker(expectedType) {
      function validate(props, propName, componentName, location, propFullName, secret) {
        var propValue = props[propName];
        var propType = getPropType(propValue);
        if (propType !== expectedType) {
          // `propValue` being instance of, say, date/regexp, pass the 'object'
          // check, but we can offer a more precise error message here rather than
          // 'of type `object`'.
          var preciseType = getPreciseType(propValue);
  
          return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` of type ' + ('`' + preciseType + '` supplied to `' + componentName + '`, expected ') + ('`' + expectedType + '`.'));
        }
        return null;
      }
      return createChainableTypeChecker(validate);
    }
  
    function createAnyTypeChecker() {
      return createChainableTypeChecker(emptyFunctionThatReturnsNull);
    }
  
    function createArrayOfTypeChecker(typeChecker) {
      function validate(props, propName, componentName, location, propFullName) {
        if (typeof typeChecker !== 'function') {
          return new PropTypeError('Property `' + propFullName + '` of component `' + componentName + '` has invalid PropType notation inside arrayOf.');
        }
        var propValue = props[propName];
        if (!Array.isArray(propValue)) {
          var propType = getPropType(propValue);
          return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` of type ' + ('`' + propType + '` supplied to `' + componentName + '`, expected an array.'));
        }
        for (var i = 0; i < propValue.length; i++) {
          var error = typeChecker(propValue, i, componentName, location, propFullName + '[' + i + ']', ReactPropTypesSecret_1);
          if (error instanceof Error) {
            return error;
          }
        }
        return null;
      }
      return createChainableTypeChecker(validate);
    }
  
    function createElementTypeChecker() {
      function validate(props, propName, componentName, location, propFullName) {
        var propValue = props[propName];
        if (!isValidElement(propValue)) {
          var propType = getPropType(propValue);
          return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` of type ' + ('`' + propType + '` supplied to `' + componentName + '`, expected a single ReactElement.'));
        }
        return null;
      }
      return createChainableTypeChecker(validate);
    }
  
    function createElementTypeTypeChecker() {
      function validate(props, propName, componentName, location, propFullName) {
        var propValue = props[propName];
        if (!reactIs.isValidElementType(propValue)) {
          var propType = getPropType(propValue);
          return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` of type ' + ('`' + propType + '` supplied to `' + componentName + '`, expected a single ReactElement type.'));
        }
        return null;
      }
      return createChainableTypeChecker(validate);
    }
  
    function createInstanceTypeChecker(expectedClass) {
      function validate(props, propName, componentName, location, propFullName) {
        if (!(props[propName] instanceof expectedClass)) {
          var expectedClassName = expectedClass.name || ANONYMOUS;
          var actualClassName = getClassName(props[propName]);
          return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` of type ' + ('`' + actualClassName + '` supplied to `' + componentName + '`, expected ') + ('instance of `' + expectedClassName + '`.'));
        }
        return null;
      }
      return createChainableTypeChecker(validate);
    }
  
    function createEnumTypeChecker(expectedValues) {
      if (!Array.isArray(expectedValues)) {
        if (process.env.NODE_ENV !== 'production') {
          if (arguments.length > 1) {
            printWarning$1(
              'Invalid arguments supplied to oneOf, expected an array, got ' + arguments.length + ' arguments. ' +
              'A common mistake is to write oneOf(x, y, z) instead of oneOf([x, y, z]).'
            );
          } else {
            printWarning$1('Invalid argument supplied to oneOf, expected an array.');
          }
        }
        return emptyFunctionThatReturnsNull;
      }
  
      function validate(props, propName, componentName, location, propFullName) {
        var propValue = props[propName];
        for (var i = 0; i < expectedValues.length; i++) {
          if (is(propValue, expectedValues[i])) {
            return null;
          }
        }
  
        var valuesString = JSON.stringify(expectedValues, function replacer(key, value) {
          var type = getPreciseType(value);
          if (type === 'symbol') {
            return String(value);
          }
          return value;
        });
        return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` of value `' + String(propValue) + '` ' + ('supplied to `' + componentName + '`, expected one of ' + valuesString + '.'));
      }
      return createChainableTypeChecker(validate);
    }
  
    function createObjectOfTypeChecker(typeChecker) {
      function validate(props, propName, componentName, location, propFullName) {
        if (typeof typeChecker !== 'function') {
          return new PropTypeError('Property `' + propFullName + '` of component `' + componentName + '` has invalid PropType notation inside objectOf.');
        }
        var propValue = props[propName];
        var propType = getPropType(propValue);
        if (propType !== 'object') {
          return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` of type ' + ('`' + propType + '` supplied to `' + componentName + '`, expected an object.'));
        }
        for (var key in propValue) {
          if (has$1(propValue, key)) {
            var error = typeChecker(propValue, key, componentName, location, propFullName + '.' + key, ReactPropTypesSecret_1);
            if (error instanceof Error) {
              return error;
            }
          }
        }
        return null;
      }
      return createChainableTypeChecker(validate);
    }
  
    function createUnionTypeChecker(arrayOfTypeCheckers) {
      if (!Array.isArray(arrayOfTypeCheckers)) {
        process.env.NODE_ENV !== 'production' ? printWarning$1('Invalid argument supplied to oneOfType, expected an instance of array.') : void 0;
        return emptyFunctionThatReturnsNull;
      }
  
      for (var i = 0; i < arrayOfTypeCheckers.length; i++) {
        var checker = arrayOfTypeCheckers[i];
        if (typeof checker !== 'function') {
          printWarning$1(
            'Invalid argument supplied to oneOfType. Expected an array of check functions, but ' +
            'received ' + getPostfixForTypeWarning(checker) + ' at index ' + i + '.'
          );
          return emptyFunctionThatReturnsNull;
        }
      }
  
      function validate(props, propName, componentName, location, propFullName) {
        for (var i = 0; i < arrayOfTypeCheckers.length; i++) {
          var checker = arrayOfTypeCheckers[i];
          if (checker(props, propName, componentName, location, propFullName, ReactPropTypesSecret_1) == null) {
            return null;
          }
        }
  
        return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` supplied to ' + ('`' + componentName + '`.'));
      }
      return createChainableTypeChecker(validate);
    }
  
    function createNodeChecker() {
      function validate(props, propName, componentName, location, propFullName) {
        if (!isNode(props[propName])) {
          return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` supplied to ' + ('`' + componentName + '`, expected a ReactNode.'));
        }
        return null;
      }
      return createChainableTypeChecker(validate);
    }
  
    function createShapeTypeChecker(shapeTypes) {
      function validate(props, propName, componentName, location, propFullName) {
        var propValue = props[propName];
        var propType = getPropType(propValue);
        if (propType !== 'object') {
          return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` of type `' + propType + '` ' + ('supplied to `' + componentName + '`, expected `object`.'));
        }
        for (var key in shapeTypes) {
          var checker = shapeTypes[key];
          if (!checker) {
            continue;
          }
          var error = checker(propValue, key, componentName, location, propFullName + '.' + key, ReactPropTypesSecret_1);
          if (error) {
            return error;
          }
        }
        return null;
      }
      return createChainableTypeChecker(validate);
    }
  
    function createStrictShapeTypeChecker(shapeTypes) {
      function validate(props, propName, componentName, location, propFullName) {
        var propValue = props[propName];
        var propType = getPropType(propValue);
        if (propType !== 'object') {
          return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` of type `' + propType + '` ' + ('supplied to `' + componentName + '`, expected `object`.'));
        }
        // We need to check all keys in case some are required but missing from
        // props.
        var allKeys = objectAssign({}, props[propName], shapeTypes);
        for (var key in allKeys) {
          var checker = shapeTypes[key];
          if (!checker) {
            return new PropTypeError(
              'Invalid ' + location + ' `' + propFullName + '` key `' + key + '` supplied to `' + componentName + '`.' +
              '\nBad object: ' + JSON.stringify(props[propName], null, '  ') +
              '\nValid keys: ' +  JSON.stringify(Object.keys(shapeTypes), null, '  ')
            );
          }
          var error = checker(propValue, key, componentName, location, propFullName + '.' + key, ReactPropTypesSecret_1);
          if (error) {
            return error;
          }
        }
        return null;
      }
  
      return createChainableTypeChecker(validate);
    }
  
    function isNode(propValue) {
      switch (typeof propValue) {
        case 'number':
        case 'string':
        case 'undefined':
          return true;
        case 'boolean':
          return !propValue;
        case 'object':
          if (Array.isArray(propValue)) {
            return propValue.every(isNode);
          }
          if (propValue === null || isValidElement(propValue)) {
            return true;
          }
  
          var iteratorFn = getIteratorFn(propValue);
          if (iteratorFn) {
            var iterator = iteratorFn.call(propValue);
            var step;
            if (iteratorFn !== propValue.entries) {
              while (!(step = iterator.next()).done) {
                if (!isNode(step.value)) {
                  return false;
                }
              }
            } else {
              // Iterator will provide entry [k,v] tuples rather than values.
              while (!(step = iterator.next()).done) {
                var entry = step.value;
                if (entry) {
                  if (!isNode(entry[1])) {
                    return false;
                  }
                }
              }
            }
          } else {
            return false;
          }
  
          return true;
        default:
          return false;
      }
    }
  
    function isSymbol(propType, propValue) {
      // Native Symbol.
      if (propType === 'symbol') {
        return true;
      }
  
      // falsy value can't be a Symbol
      if (!propValue) {
        return false;
      }
  
      // 19.4.3.5 Symbol.prototype[@@toStringTag] === 'Symbol'
      if (propValue['@@toStringTag'] === 'Symbol') {
        return true;
      }
  
      // Fallback for non-spec compliant Symbols which are polyfilled.
      if (typeof Symbol === 'function' && propValue instanceof Symbol) {
        return true;
      }
  
      return false;
    }
  
    // Equivalent of `typeof` but with special handling for array and regexp.
    function getPropType(propValue) {
      var propType = typeof propValue;
      if (Array.isArray(propValue)) {
        return 'array';
      }
      if (propValue instanceof RegExp) {
        // Old webkits (at least until Android 4.0) return 'function' rather than
        // 'object' for typeof a RegExp. We'll normalize this here so that /bla/
        // passes PropTypes.object.
        return 'object';
      }
      if (isSymbol(propType, propValue)) {
        return 'symbol';
      }
      return propType;
    }
  
    // This handles more types than `getPropType`. Only used for error messages.
    // See `createPrimitiveTypeChecker`.
    function getPreciseType(propValue) {
      if (typeof propValue === 'undefined' || propValue === null) {
        return '' + propValue;
      }
      var propType = getPropType(propValue);
      if (propType === 'object') {
        if (propValue instanceof Date) {
          return 'date';
        } else if (propValue instanceof RegExp) {
          return 'regexp';
        }
      }
      return propType;
    }
  
    // Returns a string that is postfixed to a warning about an invalid type.
    // For example, "undefined" or "of type array"
    function getPostfixForTypeWarning(value) {
      var type = getPreciseType(value);
      switch (type) {
        case 'array':
        case 'object':
          return 'an ' + type;
        case 'boolean':
        case 'date':
        case 'regexp':
          return 'a ' + type;
        default:
          return type;
      }
    }
  
    // Returns class name of the object, if any.
    function getClassName(propValue) {
      if (!propValue.constructor || !propValue.constructor.name) {
        return ANONYMOUS;
      }
      return propValue.constructor.name;
    }
  
    ReactPropTypes.checkPropTypes = checkPropTypes_1;
    ReactPropTypes.resetWarningCache = checkPropTypes_1.resetWarningCache;
    ReactPropTypes.PropTypes = ReactPropTypes;
  
    return ReactPropTypes;
  };
  
  function emptyFunction() {}
  function emptyFunctionWithReset() {}
  emptyFunctionWithReset.resetWarningCache = emptyFunction;
  
  var factoryWithThrowingShims = function() {
    function shim(props, propName, componentName, location, propFullName, secret) {
      if (secret === ReactPropTypesSecret_1) {
        // It is still safe when called from React.
        return;
      }
      var err = new Error(
        'Calling PropTypes validators directly is not supported by the `prop-types` package. ' +
        'Use PropTypes.checkPropTypes() to call them. ' +
        'Read more at http://fb.me/use-check-prop-types'
      );
      err.name = 'Invariant Violation';
      throw err;
    }  shim.isRequired = shim;
    function getShim() {
      return shim;
    }  // Important!
    // Keep this list in sync with production version in `./factoryWithTypeCheckers.js`.
    var ReactPropTypes = {
      array: shim,
      bool: shim,
      func: shim,
      number: shim,
      object: shim,
      string: shim,
      symbol: shim,
  
      any: shim,
      arrayOf: getShim,
      element: shim,
      elementType: shim,
      instanceOf: getShim,
      node: shim,
      objectOf: getShim,
      oneOf: getShim,
      oneOfType: getShim,
      shape: getShim,
      exact: getShim,
  
      checkPropTypes: emptyFunctionWithReset,
      resetWarningCache: emptyFunction
    };
  
    ReactPropTypes.PropTypes = ReactPropTypes;
  
    return ReactPropTypes;
  };
  
  var propTypes = createCommonjsModule(function (module) {
  /**
   * Copyright (c) 2013-present, Facebook, Inc.
   *
   * This source code is licensed under the MIT license found in the
   * LICENSE file in the root directory of this source tree.
   */
  
  if (process.env.NODE_ENV !== 'production') {
    var ReactIs = reactIs;
  
    // By explicitly using `prop-types` you are opting into new development behavior.
    // http://fb.me/prop-types-in-prod
    var throwOnDirectAccess = true;
    module.exports = factoryWithTypeCheckers(ReactIs.isElement, throwOnDirectAccess);
  } else {
    // By explicitly using `prop-types` you are opting into new production behavior.
    // http://fb.me/prop-types-in-prod
    module.exports = factoryWithThrowingShims();
  }
  });
  
  class ViewportLayout extends Array {
    constructor(title, id) {
      super(0);
      Object.defineProperties(this, {
        title: {
          value: title
        },
        id: {
          value: id
        }
      });
    }
  
    add(x, y, z, w) {
      const entry = new Float64Array(4);
      entry[0] = isNaN(x) ? 0.0 : x;
      entry[1] = isNaN(y) ? 0.0 : y;
      entry[2] = isNaN(z) ? 0.0 : z;
      entry[3] = isNaN(w) ? 0.0 : w;
  
      if (ViewportLayout.isValidEntry(entry)) {
        return this.push(entry);
      }
  
      return this.length;
    }
  
    get(i) {
      if (i >= 0 && i < this.length) {
        const entry = this[i];
  
        if (ViewportLayout.isValidEntry(entry)) {
          return entry;
        }
      }
    }
  
    static isValidEntry(subject) {
      return subject instanceof Float64Array && subject.length === 4 && subject[0] >= 0.0 && subject[2] <= 1.0 && subject[2] > subject[0] && subject[1] <= 1.0 && subject[3] >= 0.0 && subject[3] < subject[1];
    }
  
  }
  
  function getStyleFromSpatialPosition(spatialPosition) {
    if (spatialPosition instanceof Float64Array && spatialPosition.length === 4) {
      const [left, top, right, bottom] = Array.prototype.map.call(spatialPosition, (s, i) => {
        if (i === 1 || i === 2) s = 1.0 - s;
        return (s * 100.0).toFixed(4) + '%';
      });
      return Object.freeze({
        left,
        top,
        right,
        bottom
      });
    }
  
    return null;
  }
  
  function createGridLayout(layout, rows, columns) {
    const count = rows * columns;
  
    if (layout instanceof ViewportLayout && count > 0) {
      const xStep = 1 / columns;
      const yStep = 1 / rows;
  
      for (let i = 0; i < count; ++i) {
        const xOff = i % columns;
        const yOff = rows - (i - xOff) / columns;
        const xOrig = xOff * xStep;
        const yOrig = yOff * yStep;
        layout.add(xOrig, yOrig, xOrig + xStep, yOrig - yStep);
      }
  
      return count;
    }
  
    return 0;
  }
  
  function create3PlaneLayout(layout) {
    if (layout instanceof ViewportLayout) {
      layout.add(0.0, 1.0, 0.5, 0.5);
      layout.add(0.0, 0.5, 0.5, 0.0);
      layout.add(0.5, 1.0, 1.0, 0.0);
      return layout;
    }
  
    return null;
  }
  
  function getSuitableGridLayout(count) {
    let rows = 1;
    let columns = 1;
  
    if ((count |= 0) >= 2) {
      columns = Math.ceil(Math.sqrt(count));
      rows = count === 2 ? 1 : columns;
    }
  
    return Object.freeze({
      rows,
      columns
    });
  }
  
  const layoutToViewports = layout => {
    const viewports = [];
  
    if (layout instanceof ViewportLayout) {
      layout.forEach(spatialPosition => {
        if (ViewportLayout.isValidEntry(spatialPosition)) {
          viewports.push({
            spatialPosition,
            plugin: 'cornerstone'
          });
        }
      });
    }
  
    return viewports;
  };
  
  class ViewportGridLayout extends ViewportLayout {
    constructor(rows, columns) {
      super(`Grid ${rows}x${columns}`, `grid-${rows}x${columns}`);
      this.rows = Math.max(1, rows | 0);
      this.columns = Math.max(1, columns | 0);
      createGridLayout(this, rows, columns);
      Object.freeze(this);
    }
  
    static for(count) {
      const {
        rows,
        columns
      } = getSuitableGridLayout(count);
      return new ViewportGridLayout(rows, columns);
    }
  
  }
  
  const _subscriptions = Symbol('subscriptions');
  
  const _lastSubscriptionId = Symbol('lastSubscriptionId');
  
  class PubSub {
    constructor() {
      this[_subscriptions] = {};
      this[_lastSubscriptionId] = 0;
    }
  
    subscribe(eventName, callback) {
      if (typeof callback !== 'function') {
        throw new Error('The provided callback must be a function');
      }
  
      if (!this[_subscriptions].hasOwnProperty(eventName)) {
        this[_subscriptions][eventName] = {};
      }
  
      const subscriptionId = `sub${this[_lastSubscriptionId]++}`;
      this[_subscriptions][eventName][subscriptionId] = callback;
    }
  
    unsubscribe(eventName, callback) {
      const callbacks = this[_subscriptions][eventName] || {};
  
      for (let subscriptionId in callbacks) {
        if (!callback) {
          delete callbacks[subscriptionId];
        } else if (callbacks[subscriptionId] === callback) {
          delete callbacks[subscriptionId];
        }
      }
    }
  
    publish(eventName, ...payload) {
      const callbacks = this[_subscriptions][eventName] || {};
  
      for (let subscriptionId in callbacks) {
        callbacks[subscriptionId](...payload);
      }
    }
  
    unsubscribeFromAll() {
      for (let eventName in this[_subscriptions]) {
        const callbacks = this[_subscriptions][eventName];
  
        for (let subscriptionId in callbacks) {
          delete callbacks[subscriptionId];
        }
      }
    }
  
  }
  
  var styles$1 = {"layoutButton":"_LayoutButton-module__layoutButton__2k5Bq","layoutButtonLabel":"_LayoutButton-module__layoutButtonLabel__1r8A7","layoutButtonIcon":"_LayoutButton-module__layoutButtonIcon__q_pwF","layoutButtonIconBox":"_LayoutButton-module__layoutButtonIconBox__295-0","highlighted":"_LayoutButton-module__highlighted__1xVxU"};
  
  const LayoutButton = ({
    layout,
    onClick,
    showLabel,
    highlightedIndices
  }) => {
    const onClickHandler = () => onClick(layout);
  
    const boxes = [];
  
    for (let i = 0; i < layout.length; ++i) {
      const spatialPosition = layout.get(i);
  
      if (spatialPosition) {
        boxes.push( /*#__PURE__*/React.createElement("div", {
          className: classnames(styles$1.layoutButtonIconBox, highlightedIndices.includes(i) ? styles$1.highlighted : ''),
          style: getStyleFromSpatialPosition(spatialPosition),
          key: i
        }));
      }
    }
  
    return /*#__PURE__*/React.createElement("div", {
      className: styles$1.layoutButton,
      onClick: onClickHandler
    }, /*#__PURE__*/React.createElement("div", {
      className: styles$1.layoutButtonIcon
    }, boxes), showLabel && /*#__PURE__*/React.createElement("span", {
      className: styles$1.layoutButtonLabel
    }, layout.title));
  };
  
  const noop = () => {};
  
  LayoutButton.defaultProps = {
    showLabel: true,
    highlightedIndices: [],
    onClick: noop
  };
  LayoutButton.propTypes = {
    layout: propTypes.instanceOf(ViewportLayout).isRequired,
    onClick: propTypes.func,
    showLabel: propTypes.bool,
    highlightedIndices: propTypes.arrayOf(propTypes.number)
  };
  
  const DEFAULT_LAYOUT = 'grid-1x1';
  
  const _defaultViewportLayouts = Symbol('defaultViewportLayouts');
  
  const _layout = Symbol('layout');
  
  const _selected = Symbol('selected');
  
  const LayoutServiceEvents = Object.freeze({
    LayoutChanged: 'LayoutChanged',
    SelectionChanged: 'SelectionChanged'
  });
  
  class LayoutService extends PubSub {
    constructor() {
      super();
      this[_layout] = null;
      this[_selected] = 0;
      this.setLayout(this.getDefaultViewportLayoutById(DEFAULT_LAYOUT));
    }
  
    get layout() {
      return this[_layout];
    }
  
    get selected() {
      return this[_selected];
    }
  
    setLayout(newLayout) {
      const oldLayout = this[_layout];
  
      if (newLayout instanceof ViewportLayout && newLayout !== oldLayout) {
        this[_layout] = newLayout;
        this.publish(LayoutServiceEvents.LayoutChanged, newLayout, oldLayout);
        return true;
      }
  
      return false;
    }
  
    setDefaultLayoutById(id) {
      const layout = this.getDefaultViewportLayoutById(id);
      return this.setLayout(layout);
    }
  
    getContent(index) {
      const content = this[_content];
  
      if (content instanceof Array && (index |= 0) >= 0 && index < content.length) {
        return content[index];
      }
  
      return null;
    }
  
    setSelected(index) {
      const {
        length
      } = this[_layout];
      const previous = this[_selected];
  
      if ((index |= 0) >= 0 && index < length && index !== previous) {
        this[_selected] = index;
        this.publish(LayoutServiceEvents.SelectionChanged, this[_selected], previous);
      }
    }
  
    getDefaultViewportLayouts() {
      let defaultViewportLayouts = LayoutService[_defaultViewportLayouts];
  
      if (!defaultViewportLayouts) {
        defaultViewportLayouts = Object.freeze([new ViewportGridLayout(1, 1), new ViewportGridLayout(1, 2), new ViewportGridLayout(1, 3), new ViewportGridLayout(2, 1), new ViewportGridLayout(2, 2), new ViewportGridLayout(2, 3), new ViewportGridLayout(3, 3), create3PlaneLayout(new ViewportLayout('3-Plane', '3-plane'))]);
        LayoutService[_defaultViewportLayouts] = defaultViewportLayouts;
      }
  
      return defaultViewportLayouts;
    }
  
    getDefaultViewportLayoutById(id) {
      const layouts = this.getDefaultViewportLayouts();
  
      for (let i = 0; i < layouts.length; ++i) {
        const layout = layouts[i];
  
        if (layout.id === id) {
          return layout;
        }
      }
  
      return null;
    }
  
  }
  
  LayoutService.Events = LayoutServiceEvents;
  var LayoutService$1 = new LayoutService();
  
  var styles$2 = {"layoutSelector":"_LayoutSelector-module__layoutSelector__2uJOA","layoutOptions":"_LayoutSelector-module__layoutOptions__23Lkt","layoutButton":"_LayoutSelector-module__layoutButton__3e-aB"};
  
  const LayoutSelector = () => {
    const [layout, setLayout] = useState(null);
    const layoutOptions = LayoutService$1.getDefaultViewportLayouts();
    const options = useMemo(() => {
      const buttons = [];
  
      const onClickHandler = layout => {
        LayoutService$1.setLayout(layout);
      };
  
      for (let i = 0; i < layoutOptions.length; ++i) {
        buttons.push( /*#__PURE__*/React.createElement(LayoutButton, {
          layout: layoutOptions[i],
          key: i,
          onClick: onClickHandler
        }));
      }
  
      return buttons;
    }, [layoutOptions]);
    useEffect(() => {
      const {
        LayoutChanged
      } = LayoutServiceEvents;
      LayoutService$1.subscribe(LayoutChanged, setLayout);
      setLayout(LayoutService$1.layout);
      return () => {
        LayoutService$1.unsubscribe(LayoutChanged, setLayout);
      };
    }, []);
    return /*#__PURE__*/React.createElement("div", {
      className: styles$2.layoutSelector
    }, layout && /*#__PURE__*/React.createElement(LayoutButton, {
      layout: layout
    }), options.length > 0 && /*#__PURE__*/React.createElement("div", {
      className: styles$2.layoutOptions
    }, options));
  };
  
  var styles$3 = {"displayEnvironment":"_DisplayEnvironment-module__displayEnvironment__1z13W","displayEnvironmentWrapper":"_DisplayEnvironment-module__displayEnvironmentWrapper__1ky4k","viewportBox":"_DisplayEnvironment-module__viewportBox__1La0r"};
  
  const {
    LayoutChanged
  } = LayoutServiceEvents;
  
  const DisplayEnvironment = () => {
    const [viewports, setViewports] = useState([]);
    useEffect(() => {
      LayoutService$1.setDefaultLayoutById('grid-2x2', true);
      const viewports = layoutToViewports(LayoutService$1.layout);
      setViewports(viewports);
  
      const onLayoutChangeHandler = layout => {
        const viewports = layoutToViewports(layout);
        setViewports(viewports);
      };
  
      LayoutService$1.subscribe(LayoutChanged, onLayoutChangeHandler);
      return () => {
        LayoutService$1.unsubscribe(LayoutChanged, onLayoutChangeHandler);
      };
    }, []);
  
    const getViewportBoxes = () => viewports.map(({
      spatialPosition,
      plugin
    }, viewportIndex) => {
      const viewportId = `empty-${viewportIndex}`;
      const style = getStyleFromSpatialPosition(spatialPosition);
  
      const getViewport = plugin => /*#__PURE__*/React.createElement("div", null, "Test Viewport");
  
      const ViewportComponent = getViewport();
      return /*#__PURE__*/React.createElement("div", {
        className: styles$3.viewportBox,
        style: style,
        "data-viewport-id": viewportId,
        key: viewportId
      }, ViewportComponent);
    });
  
    const ViewportBoxes = useMemo(getViewportBoxes, [viewports]);
    return /*#__PURE__*/React.createElement("div", {
      className: styles$3.displayEnvironmentWrapper
    }, /*#__PURE__*/React.createElement(LayoutSelector, null), /*#__PURE__*/React.createElement("div", {
      className: styles$3.displayEnvironment
    }, ViewportBoxes));
  };
  
  const ExampleComponent = ({
    text
  }) => {
    return /*#__PURE__*/React.createElement("div", {
      className: styles.test
    }, "Example Component: ", text);
  };
  
  export { DisplayEnvironment, ExampleComponent, LayoutButton, LayoutSelector, LayoutService$1 as LayoutService, PubSub, ViewportGridLayout, ViewportLayout, create3PlaneLayout, createGridLayout, getStyleFromSpatialPosition, getSuitableGridLayout, layoutToViewports };
  //# sourceMappingURL=index.modern.js.map
  