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120 lines (104 loc) · 3.52 KB
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/**
* Copyright 2013-2015, 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.
*
* @providesModule ReactReconciler
*/
'use strict';
var ReactRef = require("./ReactRef");
var ReactElementValidator = require("./ReactElementValidator");
/**
* Helper to call ReactRef.attachRefs with this composite component, split out
* to avoid allocations in the transaction mount-ready queue.
*/
function attachRefs() {
ReactRef.attachRefs(this, this._currentElement);
}
var ReactReconciler = {
/**
* Initializes the component, renders markup, and registers event listeners.
*
* @param {ReactComponent} internalInstance
* @param {string} rootID DOM ID of the root node.
* @param {ReactReconcileTransaction|ReactServerRenderingTransaction} transaction
* @return {?string} Rendered markup to be inserted into the DOM.
* @final
* @internal
*/
mountComponent: function(internalInstance, rootID, transaction, context) {
var markup = internalInstance.mountComponent(rootID, transaction, context);
if ("production" !== process.env.NODE_ENV) {
ReactElementValidator.checkAndWarnForMutatedProps(
internalInstance._currentElement
);
}
transaction.getReactMountReady().enqueue(attachRefs, internalInstance);
return markup;
},
/**
* Releases any resources allocated by `mountComponent`.
*
* @final
* @internal
*/
unmountComponent: function(internalInstance) {
ReactRef.detachRefs(internalInstance, internalInstance._currentElement);
internalInstance.unmountComponent();
},
/**
* Update a component using a new element.
*
* @param {ReactComponent} internalInstance
* @param {ReactElement} nextElement
* @param {ReactReconcileTransaction} transaction
* @param {object} context
* @internal
*/
receiveComponent: function(
internalInstance, nextElement, transaction, context
) {
var prevElement = internalInstance._currentElement;
if (nextElement === prevElement && nextElement._owner != null) {
// Since elements are immutable after the owner is rendered,
// we can do a cheap identity compare here to determine if this is a
// superfluous reconcile. It's possible for state to be mutable but such
// change should trigger an update of the owner which would recreate
// the element. We explicitly check for the existence of an owner since
// it's possible for an element created outside a composite to be
// deeply mutated and reused.
return;
}
if ("production" !== process.env.NODE_ENV) {
ReactElementValidator.checkAndWarnForMutatedProps(nextElement);
}
var refsChanged = ReactRef.shouldUpdateRefs(
prevElement,
nextElement
);
if (refsChanged) {
ReactRef.detachRefs(internalInstance, prevElement);
}
internalInstance.receiveComponent(nextElement, transaction, context);
if (refsChanged) {
transaction.getReactMountReady().enqueue(attachRefs, internalInstance);
}
},
/**
* Flush any dirty changes in a component.
*
* @param {ReactComponent} internalInstance
* @param {ReactReconcileTransaction} transaction
* @internal
*/
performUpdateIfNecessary: function(
internalInstance,
transaction
) {
internalInstance.performUpdateIfNecessary(transaction);
}
};
module.exports = ReactReconciler;