30-seconds-of-code/node_modules/react-reconciler/cjs/react-reconciler-reflection.development.js

/** @license React v0.20.4
 * react-reconciler-reflection.development.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.
 */

'use strict';



if (process.env.NODE_ENV !== "production") {
  (function() {
'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

var React = require('react');

/**
 * Use invariant() to assert state which your program assumes to be true.
 *
 * Provide sprintf-style format (only %s is supported) and arguments
 * to provide information about what broke and what you were
 * expecting.
 *
 * The invariant message will be stripped in production, but the invariant
 * will remain to ensure logic does not differ in production.
 */

var validateFormat = function () {};

{
  validateFormat = function (format) {
    if (format === undefined) {
      throw new Error('invariant requires an error message argument');
    }
  };
}

function invariant(condition, format, a, b, c, d, e, f) {
  validateFormat(format);

  if (!condition) {
    var error = void 0;
    if (format === undefined) {
      error = new Error('Minified exception occurred; use the non-minified dev environment ' + 'for the full error message and additional helpful warnings.');
    } else {
      var args = [a, b, c, d, e, f];
      var argIndex = 0;
      error = new Error(format.replace(/%s/g, function () {
        return args[argIndex++];
      }));
      error.name = 'Invariant Violation';
    }

    error.framesToPop = 1; // we don't care about invariant's own frame
    throw error;
  }
}

// Relying on the `invariant()` implementation lets us
// preserve the format and params in the www builds.

/**
 * Similar to invariant but only logs a warning if the condition is not met.
 * This can be used to log issues in development environments in critical
 * paths. Removing the logging code for production environments will keep the
 * same logic and follow the same code paths.
 */

var warningWithoutStack = function () {};

{
  warningWithoutStack = function (condition, format) {
    for (var _len = arguments.length, args = Array(_len > 2 ? _len - 2 : 0), _key = 2; _key < _len; _key++) {
      args[_key - 2] = arguments[_key];
    }

    if (format === undefined) {
      throw new Error('`warningWithoutStack(condition, format, ...args)` requires a warning ' + 'message argument');
    }
    if (args.length > 8) {
      // Check before the condition to catch violations early.
      throw new Error('warningWithoutStack() currently supports at most 8 arguments.');
    }
    if (condition) {
      return;
    }
    if (typeof console !== 'undefined') {
      var argsWithFormat = args.map(function (item) {
        return '' + item;
      });
      argsWithFormat.unshift('Warning: ' + format);

      // We intentionally don't use spread (or .apply) directly because it
      // breaks IE9: https://github.com/facebook/react/issues/13610
      Function.prototype.apply.call(console.error, console, argsWithFormat);
    }
    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.
      var argIndex = 0;
      var message = 'Warning: ' + format.replace(/%s/g, function () {
        return args[argIndex++];
      });
      throw new Error(message);
    } catch (x) {}
  };
}

var warningWithoutStack$1 = warningWithoutStack;

/**
 * `ReactInstanceMap` maintains a mapping from a public facing stateful
 * instance (key) and the internal representation (value). This allows public
 * methods to accept the user facing instance as an argument and map them back
 * to internal methods.
 *
 * Note that this module is currently shared and assumed to be stateless.
 * If this becomes an actual Map, that will break.
 */

/**
 * This API should be called `delete` but we'd have to make sure to always
 * transform these to strings for IE support. When this transform is fully
 * supported we can rename it.
 */


function get(key) {
  return key._reactInternalFiber;
}

var ReactSharedInternals = React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED;

// Prevent newer renderers from RTE when used with older react package versions.
// Current owner and dispatcher used to share the same ref,
// but PR #14548 split them out to better support the react-debug-tools package.
if (!ReactSharedInternals.hasOwnProperty('ReactCurrentDispatcher')) {
  ReactSharedInternals.ReactCurrentDispatcher = {
    current: null
  };
}

// 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_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;

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_MEMO_TYPE = hasSymbol ? Symbol.for('react.memo') : 0xead3;
var REACT_LAZY_TYPE = hasSymbol ? Symbol.for('react.lazy') : 0xead4;

var Resolved = 1;


function refineResolvedLazyComponent(lazyComponent) {
  return lazyComponent._status === Resolved ? lazyComponent._result : null;
}

function getWrappedName(outerType, innerType, wrapperName) {
  var functionName = innerType.displayName || innerType.name || '';
  return outerType.displayName || (functionName !== '' ? wrapperName + '(' + functionName + ')' : wrapperName);
}

function getComponentName(type) {
  if (type == null) {
    // Host root, text node or just invalid type.
    return null;
  }
  {
    if (typeof type.tag === 'number') {
      warningWithoutStack$1(false, 'Received an unexpected object in getComponentName(). ' + 'This is likely a bug in React. Please file an issue.');
    }
  }
  if (typeof type === 'function') {
    return type.displayName || type.name || null;
  }
  if (typeof type === 'string') {
    return type;
  }
  switch (type) {
    case REACT_CONCURRENT_MODE_TYPE:
      return 'ConcurrentMode';
    case REACT_FRAGMENT_TYPE:
      return 'Fragment';
    case REACT_PORTAL_TYPE:
      return 'Portal';
    case REACT_PROFILER_TYPE:
      return 'Profiler';
    case REACT_STRICT_MODE_TYPE:
      return 'StrictMode';
    case REACT_SUSPENSE_TYPE:
      return 'Suspense';
  }
  if (typeof type === 'object') {
    switch (type.$$typeof) {
      case REACT_CONTEXT_TYPE:
        return 'Context.Consumer';
      case REACT_PROVIDER_TYPE:
        return 'Context.Provider';
      case REACT_FORWARD_REF_TYPE:
        return getWrappedName(type, type.render, 'ForwardRef');
      case REACT_MEMO_TYPE:
        return getComponentName(type.type);
      case REACT_LAZY_TYPE:
        {
          var thenable = type;
          var resolvedThenable = refineResolvedLazyComponent(thenable);
          if (resolvedThenable) {
            return getComponentName(resolvedThenable);
          }
        }
    }
  }
  return null;
}

var ClassComponent = 1;
 // Before we know whether it is function or class
var HostRoot = 3; // Root of a host tree. Could be nested inside another node.
var HostPortal = 4; // A subtree. Could be an entry point to a different renderer.
var HostComponent = 5;
var HostText = 6;

// Don't change these two values. They're used by React Dev Tools.
var NoEffect = /*              */0;


// You can change the rest (and add more).
var Placement = /*             */2;










// Passive & Update & Callback & Ref & Snapshot


// Union of all host effects

var ReactCurrentOwner = ReactSharedInternals.ReactCurrentOwner;

var MOUNTING = 1;
var MOUNTED = 2;
var UNMOUNTED = 3;

function isFiberMountedImpl(fiber) {
  var node = fiber;
  if (!fiber.alternate) {
    // If there is no alternate, this might be a new tree that isn't inserted
    // yet. If it is, then it will have a pending insertion effect on it.
    if ((node.effectTag & Placement) !== NoEffect) {
      return MOUNTING;
    }
    while (node.return) {
      node = node.return;
      if ((node.effectTag & Placement) !== NoEffect) {
        return MOUNTING;
      }
    }
  } else {
    while (node.return) {
      node = node.return;
    }
  }
  if (node.tag === HostRoot) {
    // TODO: Check if this was a nested HostRoot when used with
    // renderContainerIntoSubtree.
    return MOUNTED;
  }
  // If we didn't hit the root, that means that we're in an disconnected tree
  // that has been unmounted.
  return UNMOUNTED;
}

function isFiberMounted(fiber) {
  return isFiberMountedImpl(fiber) === MOUNTED;
}

function isMounted(component) {
  {
    var owner = ReactCurrentOwner.current;
    if (owner !== null && owner.tag === ClassComponent) {
      var ownerFiber = owner;
      var instance = ownerFiber.stateNode;
      !instance._warnedAboutRefsInRender ? warningWithoutStack$1(false, '%s is accessing isMounted inside its render() function. ' + 'render() should be a pure function of props and state. It should ' + 'never access something that requires stale data from the previous ' + 'render, such as refs. Move this logic to componentDidMount and ' + 'componentDidUpdate instead.', getComponentName(ownerFiber.type) || 'A component') : void 0;
      instance._warnedAboutRefsInRender = true;
    }
  }

  var fiber = get(component);
  if (!fiber) {
    return false;
  }
  return isFiberMountedImpl(fiber) === MOUNTED;
}

function assertIsMounted(fiber) {
  !(isFiberMountedImpl(fiber) === MOUNTED) ? invariant(false, 'Unable to find node on an unmounted component.') : void 0;
}

function findCurrentFiberUsingSlowPath(fiber) {
  var alternate = fiber.alternate;
  if (!alternate) {
    // If there is no alternate, then we only need to check if it is mounted.
    var state = isFiberMountedImpl(fiber);
    !(state !== UNMOUNTED) ? invariant(false, 'Unable to find node on an unmounted component.') : void 0;
    if (state === MOUNTING) {
      return null;
    }
    return fiber;
  }
  // If we have two possible branches, we'll walk backwards up to the root
  // to see what path the root points to. On the way we may hit one of the
  // special cases and we'll deal with them.
  var a = fiber;
  var b = alternate;
  while (true) {
    var parentA = a.return;
    var parentB = parentA ? parentA.alternate : null;
    if (!parentA || !parentB) {
      // We're at the root.
      break;
    }

    // If both copies of the parent fiber point to the same child, we can
    // assume that the child is current. This happens when we bailout on low
    // priority: the bailed out fiber's child reuses the current child.
    if (parentA.child === parentB.child) {
      var child = parentA.child;
      while (child) {
        if (child === a) {
          // We've determined that A is the current branch.
          assertIsMounted(parentA);
          return fiber;
        }
        if (child === b) {
          // We've determined that B is the current branch.
          assertIsMounted(parentA);
          return alternate;
        }
        child = child.sibling;
      }
      // We should never have an alternate for any mounting node. So the only
      // way this could possibly happen is if this was unmounted, if at all.
      invariant(false, 'Unable to find node on an unmounted component.');
    }

    if (a.return !== b.return) {
      // The return pointer of A and the return pointer of B point to different
      // fibers. We assume that return pointers never criss-cross, so A must
      // belong to the child set of A.return, and B must belong to the child
      // set of B.return.
      a = parentA;
      b = parentB;
    } else {
      // The return pointers point to the same fiber. We'll have to use the
      // default, slow path: scan the child sets of each parent alternate to see
      // which child belongs to which set.
      //
      // Search parent A's child set
      var didFindChild = false;
      var _child = parentA.child;
      while (_child) {
        if (_child === a) {
          didFindChild = true;
          a = parentA;
          b = parentB;
          break;
        }
        if (_child === b) {
          didFindChild = true;
          b = parentA;
          a = parentB;
          break;
        }
        _child = _child.sibling;
      }
      if (!didFindChild) {
        // Search parent B's child set
        _child = parentB.child;
        while (_child) {
          if (_child === a) {
            didFindChild = true;
            a = parentB;
            b = parentA;
            break;
          }
          if (_child === b) {
            didFindChild = true;
            b = parentB;
            a = parentA;
            break;
          }
          _child = _child.sibling;
        }
        !didFindChild ? invariant(false, 'Child was not found in either parent set. This indicates a bug in React related to the return pointer. Please file an issue.') : void 0;
      }
    }

    !(a.alternate === b) ? invariant(false, 'Return fibers should always be each others\' alternates. This error is likely caused by a bug in React. Please file an issue.') : void 0;
  }
  // If the root is not a host container, we're in a disconnected tree. I.e.
  // unmounted.
  !(a.tag === HostRoot) ? invariant(false, 'Unable to find node on an unmounted component.') : void 0;
  if (a.stateNode.current === a) {
    // We've determined that A is the current branch.
    return fiber;
  }
  // Otherwise B has to be current branch.
  return alternate;
}

function findCurrentHostFiber(parent) {
  var currentParent = findCurrentFiberUsingSlowPath(parent);
  if (!currentParent) {
    return null;
  }

  // Next we'll drill down this component to find the first HostComponent/Text.
  var node = currentParent;
  while (true) {
    if (node.tag === HostComponent || node.tag === HostText) {
      return node;
    } else if (node.child) {
      node.child.return = node;
      node = node.child;
      continue;
    }
    if (node === currentParent) {
      return null;
    }
    while (!node.sibling) {
      if (!node.return || node.return === currentParent) {
        return null;
      }
      node = node.return;
    }
    node.sibling.return = node.return;
    node = node.sibling;
  }
  // Flow needs the return null here, but ESLint complains about it.
  // eslint-disable-next-line no-unreachable
  return null;
}

function findCurrentHostFiberWithNoPortals(parent) {
  var currentParent = findCurrentFiberUsingSlowPath(parent);
  if (!currentParent) {
    return null;
  }

  // Next we'll drill down this component to find the first HostComponent/Text.
  var node = currentParent;
  while (true) {
    if (node.tag === HostComponent || node.tag === HostText) {
      return node;
    } else if (node.child && node.tag !== HostPortal) {
      node.child.return = node;
      node = node.child;
      continue;
    }
    if (node === currentParent) {
      return null;
    }
    while (!node.sibling) {
      if (!node.return || node.return === currentParent) {
        return null;
      }
      node = node.return;
    }
    node.sibling.return = node.return;
    node = node.sibling;
  }
  // Flow needs the return null here, but ESLint complains about it.
  // eslint-disable-next-line no-unreachable
  return null;
}

exports.isFiberMounted = isFiberMounted;
exports.isMounted = isMounted;
exports.findCurrentFiberUsingSlowPath = findCurrentFiberUsingSlowPath;
exports.findCurrentHostFiber = findCurrentHostFiber;
exports.findCurrentHostFiberWithNoPortals = findCurrentHostFiberWithNoPortals;
  })();
}