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/**
* 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');
var invariant = require('fbjs/lib/invariant');
/**
* @param {?object} object
* @return {boolean} True if `object` is a valid owner.
* @final
*/
function isValidOwner(object) {
return !!(object && typeof object.attachRef === 'function' && typeof object.detachRef === 'function');
}
/**
* ReactOwners are capable of storing references to owned components.
*
* All components are capable of //being// referenced by owner components, but
* only ReactOwner components are capable of //referencing// owned components.
* The named reference is known as a "ref".
*
* Refs are available when mounted and updated during reconciliation.
*
* var MyComponent = React.createClass({
* render: function() {
* return (
* <div onClick={this.handleClick}>
* <CustomComponent ref="custom" />
* </div>
* );
* },
* handleClick: function() {
* this.refs.custom.handleClick();
* },
* componentDidMount: function() {
* this.refs.custom.initialize();
* }
* });
*
* Refs should rarely be used. When refs are used, they should only be done to
* control data that is not handled by React's data flow.
*
* @class ReactOwner
*/
var ReactOwner = {
/**
* Adds a component by ref to an owner component.
*
* @param {ReactComponent} component Component to reference.
* @param {string} ref Name by which to refer to the component.
* @param {ReactOwner} owner Component on which to record the ref.
* @final
* @internal
*/
addComponentAsRefTo: function (component, ref, owner) {
!isValidOwner(owner) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'addComponentAsRefTo(...): Only a ReactOwner can have refs. You might be adding a ref to a component that was not created inside a component\'s `render` method, or you have multiple copies of React loaded (details: https://fb.me/react-refs-must-have-owner).') : _prodInvariant('119') : void 0;
owner.attachRef(ref, component);
},
/**
* Removes a component by ref from an owner component.
*
* @param {ReactComponent} component Component to dereference.
* @param {string} ref Name of the ref to remove.
* @param {ReactOwner} owner Component on which the ref is recorded.
* @final
* @internal
*/
removeComponentAsRefFrom: function (component, ref, owner) {
!isValidOwner(owner) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'removeComponentAsRefFrom(...): Only a ReactOwner can have refs. You might be removing a ref to a component that was not created inside a component\'s `render` method, or you have multiple copies of React loaded (details: https://fb.me/react-refs-must-have-owner).') : _prodInvariant('120') : void 0;
var ownerPublicInstance = owner.getPublicInstance();
// Check that `component`'s owner is still alive and that `component` is still the current ref
// because we do not want to detach the ref if another component stole it.
if (ownerPublicInstance && ownerPublicInstance.refs[ref] === component.getPublicInstance()) {
owner.detachRef(ref);
}
}
};
module.exports = ReactOwner;
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