node_modules

1 files changed, 901 insertions, 0 deletions

diff --git a/node_modules/react-dom/lib/ReactCompositeComponent.js b/node_modules/react-dom/lib/ReactCompositeComponent.js
new file mode 100644
index 000000000..9f751b203
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+++ b/node_modules/react-dom/lib/ReactCompositeComponent.js
@@ -0,0 +1,901 @@
+/**
+ * Copyright 2013-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ *
+ */
+
+'use strict';
+
+var _prodInvariant = require('./reactProdInvariant'),
+    _assign = require('object-assign');
+
+var React = require('react/lib/React');
+var ReactComponentEnvironment = require('./ReactComponentEnvironment');
+var ReactCurrentOwner = require('react/lib/ReactCurrentOwner');
+var ReactErrorUtils = require('./ReactErrorUtils');
+var ReactInstanceMap = require('./ReactInstanceMap');
+var ReactInstrumentation = require('./ReactInstrumentation');
+var ReactNodeTypes = require('./ReactNodeTypes');
+var ReactReconciler = require('./ReactReconciler');
+
+if (process.env.NODE_ENV !== 'production') {
+  var checkReactTypeSpec = require('./checkReactTypeSpec');
+}
+
+var emptyObject = require('fbjs/lib/emptyObject');
+var invariant = require('fbjs/lib/invariant');
+var shallowEqual = require('fbjs/lib/shallowEqual');
+var shouldUpdateReactComponent = require('./shouldUpdateReactComponent');
+var warning = require('fbjs/lib/warning');
+
+var CompositeTypes = {
+  ImpureClass: 0,
+  PureClass: 1,
+  StatelessFunctional: 2
+};
+
+function StatelessComponent(Component) {}
+StatelessComponent.prototype.render = function () {
+  var Component = ReactInstanceMap.get(this)._currentElement.type;
+  var element = Component(this.props, this.context, this.updater);
+  warnIfInvalidElement(Component, element);
+  return element;
+};
+
+function warnIfInvalidElement(Component, element) {
+  if (process.env.NODE_ENV !== 'production') {
+    process.env.NODE_ENV !== 'production' ? warning(element === null || element === false || React.isValidElement(element), '%s(...): A valid React element (or null) must be returned. You may have ' + 'returned undefined, an array or some other invalid object.', Component.displayName || Component.name || 'Component') : void 0;
+    process.env.NODE_ENV !== 'production' ? warning(!Component.childContextTypes, '%s(...): childContextTypes cannot be defined on a functional component.', Component.displayName || Component.name || 'Component') : void 0;
+  }
+}
+
+function shouldConstruct(Component) {
+  return !!(Component.prototype && Component.prototype.isReactComponent);
+}
+
+function isPureComponent(Component) {
+  return !!(Component.prototype && Component.prototype.isPureReactComponent);
+}
+
+// Separated into a function to contain deoptimizations caused by try/finally.
+function measureLifeCyclePerf(fn, debugID, timerType) {
+  if (debugID === 0) {
+    // Top-level wrappers (see ReactMount) and empty components (see
+    // ReactDOMEmptyComponent) are invisible to hooks and devtools.
+    // Both are implementation details that should go away in the future.
+    return fn();
+  }
+
+  ReactInstrumentation.debugTool.onBeginLifeCycleTimer(debugID, timerType);
+  try {
+    return fn();
+  } finally {
+    ReactInstrumentation.debugTool.onEndLifeCycleTimer(debugID, timerType);
+  }
+}
+
+/**
+ * ------------------ The Life-Cycle of a Composite Component ------------------
+ *
+ * - constructor: Initialization of state. The instance is now retained.
+ *   - componentWillMount
+ *   - render
+ *   - [children's constructors]
+ *     - [children's componentWillMount and render]
+ *     - [children's componentDidMount]
+ *     - componentDidMount
+ *
+ *       Update Phases:
+ *       - componentWillReceiveProps (only called if parent updated)
+ *       - shouldComponentUpdate
+ *         - componentWillUpdate
+ *           - render
+ *           - [children's constructors or receive props phases]
+ *         - componentDidUpdate
+ *
+ *     - componentWillUnmount
+ *     - [children's componentWillUnmount]
+ *   - [children destroyed]
+ * - (destroyed): The instance is now blank, released by React and ready for GC.
+ *
+ * -----------------------------------------------------------------------------
+ */
+
+/**
+ * An incrementing ID assigned to each component when it is mounted. This is
+ * used to enforce the order in which `ReactUpdates` updates dirty components.
+ *
+ * @private
+ */
+var nextMountID = 1;
+
+/**
+ * @lends {ReactCompositeComponent.prototype}
+ */
+var ReactCompositeComponent = {
+
+  /**
+   * Base constructor for all composite component.
+   *
+   * @param {ReactElement} element
+   * @final
+   * @internal
+   */
+  construct: function (element) {
+    this._currentElement = element;
+    this._rootNodeID = 0;
+    this._compositeType = null;
+    this._instance = null;
+    this._hostParent = null;
+    this._hostContainerInfo = null;
+
+    // See ReactUpdateQueue
+    this._updateBatchNumber = null;
+    this._pendingElement = null;
+    this._pendingStateQueue = null;
+    this._pendingReplaceState = false;
+    this._pendingForceUpdate = false;
+
+    this._renderedNodeType = null;
+    this._renderedComponent = null;
+    this._context = null;
+    this._mountOrder = 0;
+    this._topLevelWrapper = null;
+
+    // See ReactUpdates and ReactUpdateQueue.
+    this._pendingCallbacks = null;
+
+    // ComponentWillUnmount shall only be called once
+    this._calledComponentWillUnmount = false;
+
+    if (process.env.NODE_ENV !== 'production') {
+      this._warnedAboutRefsInRender = false;
+    }
+  },
+
+  /**
+   * Initializes the component, renders markup, and registers event listeners.
+   *
+   * @param {ReactReconcileTransaction|ReactServerRenderingTransaction} transaction
+   * @param {?object} hostParent
+   * @param {?object} hostContainerInfo
+   * @param {?object} context
+   * @return {?string} Rendered markup to be inserted into the DOM.
+   * @final
+   * @internal
+   */
+  mountComponent: function (transaction, hostParent, hostContainerInfo, context) {
+    var _this = this;
+
+    this._context = context;
+    this._mountOrder = nextMountID++;
+    this._hostParent = hostParent;
+    this._hostContainerInfo = hostContainerInfo;
+
+    var publicProps = this._currentElement.props;
+    var publicContext = this._processContext(context);
+
+    var Component = this._currentElement.type;
+
+    var updateQueue = transaction.getUpdateQueue();
+
+    // Initialize the public class
+    var doConstruct = shouldConstruct(Component);
+    var inst = this._constructComponent(doConstruct, publicProps, publicContext, updateQueue);
+    var renderedElement;
+
+    // Support functional components
+    if (!doConstruct && (inst == null || inst.render == null)) {
+      renderedElement = inst;
+      warnIfInvalidElement(Component, renderedElement);
+      !(inst === null || inst === false || React.isValidElement(inst)) ? process.env.NODE_ENV !== 'production' ? invariant(false, '%s(...): A valid React element (or null) must be returned. You may have returned undefined, an array or some other invalid object.', Component.displayName || Component.name || 'Component') : _prodInvariant('105', Component.displayName || Component.name || 'Component') : void 0;
+      inst = new StatelessComponent(Component);
+      this._compositeType = CompositeTypes.StatelessFunctional;
+    } else {
+      if (isPureComponent(Component)) {
+        this._compositeType = CompositeTypes.PureClass;
+      } else {
+        this._compositeType = CompositeTypes.ImpureClass;
+      }
+    }
+
+    if (process.env.NODE_ENV !== 'production') {
+      // This will throw later in _renderValidatedComponent, but add an early
+      // warning now to help debugging
+      if (inst.render == null) {
+        process.env.NODE_ENV !== 'production' ? warning(false, '%s(...): No `render` method found on the returned component ' + 'instance: you may have forgotten to define `render`.', Component.displayName || Component.name || 'Component') : void 0;
+      }
+
+      var propsMutated = inst.props !== publicProps;
+      var componentName = Component.displayName || Component.name || 'Component';
+
+      process.env.NODE_ENV !== 'production' ? warning(inst.props === undefined || !propsMutated, '%s(...): When calling super() in `%s`, make sure to pass ' + 'up the same props that your component\'s constructor was passed.', componentName, componentName) : void 0;
+    }
+
+    // These should be set up in the constructor, but as a convenience for
+    // simpler class abstractions, we set them up after the fact.
+    inst.props = publicProps;
+    inst.context = publicContext;
+    inst.refs = emptyObject;
+    inst.updater = updateQueue;
+
+    this._instance = inst;
+
+    // Store a reference from the instance back to the internal representation
+    ReactInstanceMap.set(inst, this);
+
+    if (process.env.NODE_ENV !== 'production') {
+      // Since plain JS classes are defined without any special initialization
+      // logic, we can not catch common errors early. Therefore, we have to
+      // catch them here, at initialization time, instead.
+      process.env.NODE_ENV !== 'production' ? warning(!inst.getInitialState || inst.getInitialState.isReactClassApproved || inst.state, 'getInitialState was defined on %s, a plain JavaScript class. ' + 'This is only supported for classes created using React.createClass. ' + 'Did you mean to define a state property instead?', this.getName() || 'a component') : void 0;
+      process.env.NODE_ENV !== 'production' ? warning(!inst.getDefaultProps || inst.getDefaultProps.isReactClassApproved, 'getDefaultProps was defined on %s, a plain JavaScript class. ' + 'This is only supported for classes created using React.createClass. ' + 'Use a static property to define defaultProps instead.', this.getName() || 'a component') : void 0;
+      process.env.NODE_ENV !== 'production' ? warning(!inst.propTypes, 'propTypes was defined as an instance property on %s. Use a static ' + 'property to define propTypes instead.', this.getName() || 'a component') : void 0;
+      process.env.NODE_ENV !== 'production' ? warning(!inst.contextTypes, 'contextTypes was defined as an instance property on %s. Use a ' + 'static property to define contextTypes instead.', this.getName() || 'a component') : void 0;
+      process.env.NODE_ENV !== 'production' ? warning(typeof inst.componentShouldUpdate !== 'function', '%s has a method called ' + 'componentShouldUpdate(). Did you mean shouldComponentUpdate()? ' + 'The name is phrased as a question because the function is ' + 'expected to return a value.', this.getName() || 'A component') : void 0;
+      process.env.NODE_ENV !== 'production' ? warning(typeof inst.componentDidUnmount !== 'function', '%s has a method called ' + 'componentDidUnmount(). But there is no such lifecycle method. ' + 'Did you mean componentWillUnmount()?', this.getName() || 'A component') : void 0;
+      process.env.NODE_ENV !== 'production' ? warning(typeof inst.componentWillRecieveProps !== 'function', '%s has a method called ' + 'componentWillRecieveProps(). Did you mean componentWillReceiveProps()?', this.getName() || 'A component') : void 0;
+    }
+
+    var initialState = inst.state;
+    if (initialState === undefined) {
+      inst.state = initialState = null;
+    }
+    !(typeof initialState === 'object' && !Array.isArray(initialState)) ? process.env.NODE_ENV !== 'production' ? invariant(false, '%s.state: must be set to an object or null', this.getName() || 'ReactCompositeComponent') : _prodInvariant('106', this.getName() || 'ReactCompositeComponent') : void 0;
+
+    this._pendingStateQueue = null;
+    this._pendingReplaceState = false;
+    this._pendingForceUpdate = false;
+
+    var markup;
+    if (inst.unstable_handleError) {
+      markup = this.performInitialMountWithErrorHandling(renderedElement, hostParent, hostContainerInfo, transaction, context);
+    } else {
+      markup = this.performInitialMount(renderedElement, hostParent, hostContainerInfo, transaction, context);
+    }
+
+    if (inst.componentDidMount) {
+      if (process.env.NODE_ENV !== 'production') {
+        transaction.getReactMountReady().enqueue(function () {
+          measureLifeCyclePerf(function () {
+            return inst.componentDidMount();
+          }, _this._debugID, 'componentDidMount');
+        });
+      } else {
+        transaction.getReactMountReady().enqueue(inst.componentDidMount, inst);
+      }
+    }
+
+    return markup;
+  },
+
+  _constructComponent: function (doConstruct, publicProps, publicContext, updateQueue) {
+    if (process.env.NODE_ENV !== 'production') {
+      ReactCurrentOwner.current = this;
+      try {
+        return this._constructComponentWithoutOwner(doConstruct, publicProps, publicContext, updateQueue);
+      } finally {
+        ReactCurrentOwner.current = null;
+      }
+    } else {
+      return this._constructComponentWithoutOwner(doConstruct, publicProps, publicContext, updateQueue);
+    }
+  },
+
+  _constructComponentWithoutOwner: function (doConstruct, publicProps, publicContext, updateQueue) {
+    var Component = this._currentElement.type;
+
+    if (doConstruct) {
+      if (process.env.NODE_ENV !== 'production') {
+        return measureLifeCyclePerf(function () {
+          return new Component(publicProps, publicContext, updateQueue);
+        }, this._debugID, 'ctor');
+      } else {
+        return new Component(publicProps, publicContext, updateQueue);
+      }
+    }
+
+    // This can still be an instance in case of factory components
+    // but we'll count this as time spent rendering as the more common case.
+    if (process.env.NODE_ENV !== 'production') {
+      return measureLifeCyclePerf(function () {
+        return Component(publicProps, publicContext, updateQueue);
+      }, this._debugID, 'render');
+    } else {
+      return Component(publicProps, publicContext, updateQueue);
+    }
+  },
+
+  performInitialMountWithErrorHandling: function (renderedElement, hostParent, hostContainerInfo, transaction, context) {
+    var markup;
+    var checkpoint = transaction.checkpoint();
+    try {
+      markup = this.performInitialMount(renderedElement, hostParent, hostContainerInfo, transaction, context);
+    } catch (e) {
+      // Roll back to checkpoint, handle error (which may add items to the transaction), and take a new checkpoint
+      transaction.rollback(checkpoint);
+      this._instance.unstable_handleError(e);
+      if (this._pendingStateQueue) {
+        this._instance.state = this._processPendingState(this._instance.props, this._instance.context);
+      }
+      checkpoint = transaction.checkpoint();
+
+      this._renderedComponent.unmountComponent(true);
+      transaction.rollback(checkpoint);
+
+      // Try again - we've informed the component about the error, so they can render an error message this time.
+      // If this throws again, the error will bubble up (and can be caught by a higher error boundary).
+      markup = this.performInitialMount(renderedElement, hostParent, hostContainerInfo, transaction, context);
+    }
+    return markup;
+  },
+
+  performInitialMount: function (renderedElement, hostParent, hostContainerInfo, transaction, context) {
+    var inst = this._instance;
+
+    var debugID = 0;
+    if (process.env.NODE_ENV !== 'production') {
+      debugID = this._debugID;
+    }
+
+    if (inst.componentWillMount) {
+      if (process.env.NODE_ENV !== 'production') {
+        measureLifeCyclePerf(function () {
+          return inst.componentWillMount();
+        }, debugID, 'componentWillMount');
+      } else {
+        inst.componentWillMount();
+      }
+      // When mounting, calls to `setState` by `componentWillMount` will set
+      // `this._pendingStateQueue` without triggering a re-render.
+      if (this._pendingStateQueue) {
+        inst.state = this._processPendingState(inst.props, inst.context);
+      }
+    }
+
+    // If not a stateless component, we now render
+    if (renderedElement === undefined) {
+      renderedElement = this._renderValidatedComponent();
+    }
+
+    var nodeType = ReactNodeTypes.getType(renderedElement);
+    this._renderedNodeType = nodeType;
+    var child = this._instantiateReactComponent(renderedElement, nodeType !== ReactNodeTypes.EMPTY /* shouldHaveDebugID */
+    );
+    this._renderedComponent = child;
+
+    var markup = ReactReconciler.mountComponent(child, transaction, hostParent, hostContainerInfo, this._processChildContext(context), debugID);
+
+    if (process.env.NODE_ENV !== 'production') {
+      if (debugID !== 0) {
+        var childDebugIDs = child._debugID !== 0 ? [child._debugID] : [];
+        ReactInstrumentation.debugTool.onSetChildren(debugID, childDebugIDs);
+      }
+    }
+
+    return markup;
+  },
+
+  getHostNode: function () {
+    return ReactReconciler.getHostNode(this._renderedComponent);
+  },
+
+  /**
+   * Releases any resources allocated by `mountComponent`.
+   *
+   * @final
+   * @internal
+   */
+  unmountComponent: function (safely) {
+    if (!this._renderedComponent) {
+      return;
+    }
+
+    var inst = this._instance;
+
+    if (inst.componentWillUnmount && !inst._calledComponentWillUnmount) {
+      inst._calledComponentWillUnmount = true;
+
+      if (safely) {
+        var name = this.getName() + '.componentWillUnmount()';
+        ReactErrorUtils.invokeGuardedCallback(name, inst.componentWillUnmount.bind(inst));
+      } else {
+        if (process.env.NODE_ENV !== 'production') {
+          measureLifeCyclePerf(function () {
+            return inst.componentWillUnmount();
+          }, this._debugID, 'componentWillUnmount');
+        } else {
+          inst.componentWillUnmount();
+        }
+      }
+    }
+
+    if (this._renderedComponent) {
+      ReactReconciler.unmountComponent(this._renderedComponent, safely);
+      this._renderedNodeType = null;
+      this._renderedComponent = null;
+      this._instance = null;
+    }
+
+    // Reset pending fields
+    // Even if this component is scheduled for another update in ReactUpdates,
+    // it would still be ignored because these fields are reset.
+    this._pendingStateQueue = null;
+    this._pendingReplaceState = false;
+    this._pendingForceUpdate = false;
+    this._pendingCallbacks = null;
+    this._pendingElement = null;
+
+    // These fields do not really need to be reset since this object is no
+    // longer accessible.
+    this._context = null;
+    this._rootNodeID = 0;
+    this._topLevelWrapper = null;
+
+    // Delete the reference from the instance to this internal representation
+    // which allow the internals to be properly cleaned up even if the user
+    // leaks a reference to the public instance.
+    ReactInstanceMap.remove(inst);
+
+    // Some existing components rely on inst.props even after they've been
+    // destroyed (in event handlers).
+    // TODO: inst.props = null;
+    // TODO: inst.state = null;
+    // TODO: inst.context = null;
+  },
+
+  /**
+   * Filters the context object to only contain keys specified in
+   * `contextTypes`
+   *
+   * @param {object} context
+   * @return {?object}
+   * @private
+   */
+  _maskContext: function (context) {
+    var Component = this._currentElement.type;
+    var contextTypes = Component.contextTypes;
+    if (!contextTypes) {
+      return emptyObject;
+    }
+    var maskedContext = {};
+    for (var contextName in contextTypes) {
+      maskedContext[contextName] = context[contextName];
+    }
+    return maskedContext;
+  },
+
+  /**
+   * Filters the context object to only contain keys specified in
+   * `contextTypes`, and asserts that they are valid.
+   *
+   * @param {object} context
+   * @return {?object}
+   * @private
+   */
+  _processContext: function (context) {
+    var maskedContext = this._maskContext(context);
+    if (process.env.NODE_ENV !== 'production') {
+      var Component = this._currentElement.type;
+      if (Component.contextTypes) {
+        this._checkContextTypes(Component.contextTypes, maskedContext, 'context');
+      }
+    }
+    return maskedContext;
+  },
+
+  /**
+   * @param {object} currentContext
+   * @return {object}
+   * @private
+   */
+  _processChildContext: function (currentContext) {
+    var Component = this._currentElement.type;
+    var inst = this._instance;
+    var childContext;
+
+    if (inst.getChildContext) {
+      if (process.env.NODE_ENV !== 'production') {
+        ReactInstrumentation.debugTool.onBeginProcessingChildContext();
+        try {
+          childContext = inst.getChildContext();
+        } finally {
+          ReactInstrumentation.debugTool.onEndProcessingChildContext();
+        }
+      } else {
+        childContext = inst.getChildContext();
+      }
+    }
+
+    if (childContext) {
+      !(typeof Component.childContextTypes === 'object') ? process.env.NODE_ENV !== 'production' ? invariant(false, '%s.getChildContext(): childContextTypes must be defined in order to use getChildContext().', this.getName() || 'ReactCompositeComponent') : _prodInvariant('107', this.getName() || 'ReactCompositeComponent') : void 0;
+      if (process.env.NODE_ENV !== 'production') {
+        this._checkContextTypes(Component.childContextTypes, childContext, 'child context');
+      }
+      for (var name in childContext) {
+        !(name in Component.childContextTypes) ? process.env.NODE_ENV !== 'production' ? invariant(false, '%s.getChildContext(): key "%s" is not defined in childContextTypes.', this.getName() || 'ReactCompositeComponent', name) : _prodInvariant('108', this.getName() || 'ReactCompositeComponent', name) : void 0;
+      }
+      return _assign({}, currentContext, childContext);
+    }
+    return currentContext;
+  },
+
+  /**
+   * Assert that the context types are valid
+   *
+   * @param {object} typeSpecs Map of context field to a ReactPropType
+   * @param {object} values Runtime values that need to be type-checked
+   * @param {string} location e.g. "prop", "context", "child context"
+   * @private
+   */
+  _checkContextTypes: function (typeSpecs, values, location) {
+    if (process.env.NODE_ENV !== 'production') {
+      checkReactTypeSpec(typeSpecs, values, location, this.getName(), null, this._debugID);
+    }
+  },
+
+  receiveComponent: function (nextElement, transaction, nextContext) {
+    var prevElement = this._currentElement;
+    var prevContext = this._context;
+
+    this._pendingElement = null;
+
+    this.updateComponent(transaction, prevElement, nextElement, prevContext, nextContext);
+  },
+
+  /**
+   * If any of `_pendingElement`, `_pendingStateQueue`, or `_pendingForceUpdate`
+   * is set, update the component.
+   *
+   * @param {ReactReconcileTransaction} transaction
+   * @internal
+   */
+  performUpdateIfNecessary: function (transaction) {
+    if (this._pendingElement != null) {
+      ReactReconciler.receiveComponent(this, this._pendingElement, transaction, this._context);
+    } else if (this._pendingStateQueue !== null || this._pendingForceUpdate) {
+      this.updateComponent(transaction, this._currentElement, this._currentElement, this._context, this._context);
+    } else {
+      this._updateBatchNumber = null;
+    }
+  },
+
+  /**
+   * Perform an update to a mounted component. The componentWillReceiveProps and
+   * shouldComponentUpdate methods are called, then (assuming the update isn't
+   * skipped) the remaining update lifecycle methods are called and the DOM
+   * representation is updated.
+   *
+   * By default, this implements React's rendering and reconciliation algorithm.
+   * Sophisticated clients may wish to override this.
+   *
+   * @param {ReactReconcileTransaction} transaction
+   * @param {ReactElement} prevParentElement
+   * @param {ReactElement} nextParentElement
+   * @internal
+   * @overridable
+   */
+  updateComponent: function (transaction, prevParentElement, nextParentElement, prevUnmaskedContext, nextUnmaskedContext) {
+    var inst = this._instance;
+    !(inst != null) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'Attempted to update component `%s` that has already been unmounted (or failed to mount).', this.getName() || 'ReactCompositeComponent') : _prodInvariant('136', this.getName() || 'ReactCompositeComponent') : void 0;
+
+    var willReceive = false;
+    var nextContext;
+
+    // Determine if the context has changed or not
+    if (this._context === nextUnmaskedContext) {
+      nextContext = inst.context;
+    } else {
+      nextContext = this._processContext(nextUnmaskedContext);
+      willReceive = true;
+    }
+
+    var prevProps = prevParentElement.props;
+    var nextProps = nextParentElement.props;
+
+    // Not a simple state update but a props update
+    if (prevParentElement !== nextParentElement) {
+      willReceive = true;
+    }
+
+    // An update here will schedule an update but immediately set
+    // _pendingStateQueue which will ensure that any state updates gets
+    // immediately reconciled instead of waiting for the next batch.
+    if (willReceive && inst.componentWillReceiveProps) {
+      if (process.env.NODE_ENV !== 'production') {
+        measureLifeCyclePerf(function () {
+          return inst.componentWillReceiveProps(nextProps, nextContext);
+        }, this._debugID, 'componentWillReceiveProps');
+      } else {
+        inst.componentWillReceiveProps(nextProps, nextContext);
+      }
+    }
+
+    var nextState = this._processPendingState(nextProps, nextContext);
+    var shouldUpdate = true;
+
+    if (!this._pendingForceUpdate) {
+      if (inst.shouldComponentUpdate) {
+        if (process.env.NODE_ENV !== 'production') {
+          shouldUpdate = measureLifeCyclePerf(function () {
+            return inst.shouldComponentUpdate(nextProps, nextState, nextContext);
+          }, this._debugID, 'shouldComponentUpdate');
+        } else {
+          shouldUpdate = inst.shouldComponentUpdate(nextProps, nextState, nextContext);
+        }
+      } else {
+        if (this._compositeType === CompositeTypes.PureClass) {
+          shouldUpdate = !shallowEqual(prevProps, nextProps) || !shallowEqual(inst.state, nextState);
+        }
+      }
+    }
+
+    if (process.env.NODE_ENV !== 'production') {
+      process.env.NODE_ENV !== 'production' ? warning(shouldUpdate !== undefined, '%s.shouldComponentUpdate(): Returned undefined instead of a ' + 'boolean value. Make sure to return true or false.', this.getName() || 'ReactCompositeComponent') : void 0;
+    }
+
+    this._updateBatchNumber = null;
+    if (shouldUpdate) {
+      this._pendingForceUpdate = false;
+      // Will set `this.props`, `this.state` and `this.context`.
+      this._performComponentUpdate(nextParentElement, nextProps, nextState, nextContext, transaction, nextUnmaskedContext);
+    } else {
+      // If it's determined that a component should not update, we still want
+      // to set props and state but we shortcut the rest of the update.
+      this._currentElement = nextParentElement;
+      this._context = nextUnmaskedContext;
+      inst.props = nextProps;
+      inst.state = nextState;
+      inst.context = nextContext;
+    }
+  },
+
+  _processPendingState: function (props, context) {
+    var inst = this._instance;
+    var queue = this._pendingStateQueue;
+    var replace = this._pendingReplaceState;
+    this._pendingReplaceState = false;
+    this._pendingStateQueue = null;
+
+    if (!queue) {
+      return inst.state;
+    }
+
+    if (replace && queue.length === 1) {
+      return queue[0];
+    }
+
+    var nextState = _assign({}, replace ? queue[0] : inst.state);
+    for (var i = replace ? 1 : 0; i < queue.length; i++) {
+      var partial = queue[i];
+      _assign(nextState, typeof partial === 'function' ? partial.call(inst, nextState, props, context) : partial);
+    }
+
+    return nextState;
+  },
+
+  /**
+   * Merges new props and state, notifies delegate methods of update and
+   * performs update.
+   *
+   * @param {ReactElement} nextElement Next element
+   * @param {object} nextProps Next public object to set as properties.
+   * @param {?object} nextState Next object to set as state.
+   * @param {?object} nextContext Next public object to set as context.
+   * @param {ReactReconcileTransaction} transaction
+   * @param {?object} unmaskedContext
+   * @private
+   */
+  _performComponentUpdate: function (nextElement, nextProps, nextState, nextContext, transaction, unmaskedContext) {
+    var _this2 = this;
+
+    var inst = this._instance;
+
+    var hasComponentDidUpdate = Boolean(inst.componentDidUpdate);
+    var prevProps;
+    var prevState;
+    var prevContext;
+    if (hasComponentDidUpdate) {
+      prevProps = inst.props;
+      prevState = inst.state;
+      prevContext = inst.context;
+    }
+
+    if (inst.componentWillUpdate) {
+      if (process.env.NODE_ENV !== 'production') {
+        measureLifeCyclePerf(function () {
+          return inst.componentWillUpdate(nextProps, nextState, nextContext);
+        }, this._debugID, 'componentWillUpdate');
+      } else {
+        inst.componentWillUpdate(nextProps, nextState, nextContext);
+      }
+    }
+
+    this._currentElement = nextElement;
+    this._context = unmaskedContext;
+    inst.props = nextProps;
+    inst.state = nextState;
+    inst.context = nextContext;
+
+    this._updateRenderedComponent(transaction, unmaskedContext);
+
+    if (hasComponentDidUpdate) {
+      if (process.env.NODE_ENV !== 'production') {
+        transaction.getReactMountReady().enqueue(function () {
+          measureLifeCyclePerf(inst.componentDidUpdate.bind(inst, prevProps, prevState, prevContext), _this2._debugID, 'componentDidUpdate');
+        });
+      } else {
+        transaction.getReactMountReady().enqueue(inst.componentDidUpdate.bind(inst, prevProps, prevState, prevContext), inst);
+      }
+    }
+  },
+
+  /**
+   * Call the component's `render` method and update the DOM accordingly.
+   *
+   * @param {ReactReconcileTransaction} transaction
+   * @internal
+   */
+  _updateRenderedComponent: function (transaction, context) {
+    var prevComponentInstance = this._renderedComponent;
+    var prevRenderedElement = prevComponentInstance._currentElement;
+    var nextRenderedElement = this._renderValidatedComponent();
+
+    var debugID = 0;
+    if (process.env.NODE_ENV !== 'production') {
+      debugID = this._debugID;
+    }
+
+    if (shouldUpdateReactComponent(prevRenderedElement, nextRenderedElement)) {
+      ReactReconciler.receiveComponent(prevComponentInstance, nextRenderedElement, transaction, this._processChildContext(context));
+    } else {
+      var oldHostNode = ReactReconciler.getHostNode(prevComponentInstance);
+      ReactReconciler.unmountComponent(prevComponentInstance, false);
+
+      var nodeType = ReactNodeTypes.getType(nextRenderedElement);
+      this._renderedNodeType = nodeType;
+      var child = this._instantiateReactComponent(nextRenderedElement, nodeType !== ReactNodeTypes.EMPTY /* shouldHaveDebugID */
+      );
+      this._renderedComponent = child;
+
+      var nextMarkup = ReactReconciler.mountComponent(child, transaction, this._hostParent, this._hostContainerInfo, this._processChildContext(context), debugID);
+
+      if (process.env.NODE_ENV !== 'production') {
+        if (debugID !== 0) {
+          var childDebugIDs = child._debugID !== 0 ? [child._debugID] : [];
+          ReactInstrumentation.debugTool.onSetChildren(debugID, childDebugIDs);
+        }
+      }
+
+      this._replaceNodeWithMarkup(oldHostNode, nextMarkup, prevComponentInstance);
+    }
+  },
+
+  /**
+   * Overridden in shallow rendering.
+   *
+   * @protected
+   */
+  _replaceNodeWithMarkup: function (oldHostNode, nextMarkup, prevInstance) {
+    ReactComponentEnvironment.replaceNodeWithMarkup(oldHostNode, nextMarkup, prevInstance);
+  },
+
+  /**
+   * @protected
+   */
+  _renderValidatedComponentWithoutOwnerOrContext: function () {
+    var inst = this._instance;
+    var renderedElement;
+
+    if (process.env.NODE_ENV !== 'production') {
+      renderedElement = measureLifeCyclePerf(function () {
+        return inst.render();
+      }, this._debugID, 'render');
+    } else {
+      renderedElement = inst.render();
+    }
+
+    if (process.env.NODE_ENV !== 'production') {
+      // We allow auto-mocks to proceed as if they're returning null.
+      if (renderedElement === undefined && inst.render._isMockFunction) {
+        // This is probably bad practice. Consider warning here and
+        // deprecating this convenience.
+        renderedElement = null;
+      }
+    }
+
+    return renderedElement;
+  },
+
+  /**
+   * @private
+   */
+  _renderValidatedComponent: function () {
+    var renderedElement;
+    if (process.env.NODE_ENV !== 'production' || this._compositeType !== CompositeTypes.StatelessFunctional) {
+      ReactCurrentOwner.current = this;
+      try {
+        renderedElement = this._renderValidatedComponentWithoutOwnerOrContext();
+      } finally {
+        ReactCurrentOwner.current = null;
+      }
+    } else {
+      renderedElement = this._renderValidatedComponentWithoutOwnerOrContext();
+    }
+    !(
+    // TODO: An `isValidNode` function would probably be more appropriate
+    renderedElement === null || renderedElement === false || React.isValidElement(renderedElement)) ? process.env.NODE_ENV !== 'production' ? invariant(false, '%s.render(): A valid React element (or null) must be returned. You may have returned undefined, an array or some other invalid object.', this.getName() || 'ReactCompositeComponent') : _prodInvariant('109', this.getName() || 'ReactCompositeComponent') : void 0;
+
+    return renderedElement;
+  },
+
+  /**
+   * Lazily allocates the refs object and stores `component` as `ref`.
+   *
+   * @param {string} ref Reference name.
+   * @param {component} component Component to store as `ref`.
+   * @final
+   * @private
+   */
+  attachRef: function (ref, component) {
+    var inst = this.getPublicInstance();
+    !(inst != null) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'Stateless function components cannot have refs.') : _prodInvariant('110') : void 0;
+    var publicComponentInstance = component.getPublicInstance();
+    if (process.env.NODE_ENV !== 'production') {
+      var componentName = component && component.getName ? component.getName() : 'a component';
+      process.env.NODE_ENV !== 'production' ? warning(publicComponentInstance != null || component._compositeType !== CompositeTypes.StatelessFunctional, 'Stateless function components cannot be given refs ' + '(See ref "%s" in %s created by %s). ' + 'Attempts to access this ref will fail.', ref, componentName, this.getName()) : void 0;
+    }
+    var refs = inst.refs === emptyObject ? inst.refs = {} : inst.refs;
+    refs[ref] = publicComponentInstance;
+  },
+
+  /**
+   * Detaches a reference name.
+   *
+   * @param {string} ref Name to dereference.
+   * @final
+   * @private
+   */
+  detachRef: function (ref) {
+    var refs = this.getPublicInstance().refs;
+    delete refs[ref];
+  },
+
+  /**
+   * Get a text description of the component that can be used to identify it
+   * in error messages.
+   * @return {string} The name or null.
+   * @internal
+   */
+  getName: function () {
+    var type = this._currentElement.type;
+    var constructor = this._instance && this._instance.constructor;
+    return type.displayName || constructor && constructor.displayName || type.name || constructor && constructor.name || null;
+  },
+
+  /**
+   * Get the publicly accessible representation of this component - i.e. what
+   * is exposed by refs and returned by render. Can be null for stateless
+   * components.
+   *
+   * @return {ReactComponent} the public component instance.
+   * @internal
+   */
+  getPublicInstance: function () {
+    var inst = this._instance;
+    if (this._compositeType === CompositeTypes.StatelessFunctional) {
+      return null;
+    }
+    return inst;
+  },
+
+  // Stub
+  _instantiateReactComponent: null
+
+};
+
+module.exports = ReactCompositeComponent;
\ No newline at end of file