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a8474c25fd
Reviewed By: hramos Differential Revision: D4670890 fbshipit-source-id: e8429aa88a1d4f3cc80034dd087739410c0761f2
111 lines
3.2 KiB
JavaScript
111 lines
3.2 KiB
JavaScript
/**
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* Copyright (c) 2015, Facebook, Inc. All rights reserved.
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*
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* Facebook, Inc. ("Facebook") owns all right, title and interest, including
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* all intellectual property and other proprietary rights, in and to the React
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* Native CustomComponents software (the "Software"). Subject to your
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* compliance with these terms, you are hereby granted a non-exclusive,
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* worldwide, royalty-free copyright license to (1) use and copy the Software;
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* and (2) reproduce and distribute the Software as part of your own software
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* ("Your Software"). Facebook reserves all rights not expressly granted to
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* you in this license agreement.
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*
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* THE SOFTWARE AND DOCUMENTATION, IF ANY, ARE PROVIDED "AS IS" AND ANY EXPRESS
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* OR IMPLIED WARRANTIES (INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE) ARE DISCLAIMED.
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* IN NO EVENT SHALL FACEBOOK OR ITS AFFILIATES, OFFICERS, DIRECTORS OR
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* EMPLOYEES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THE SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* @providesModule NavigationTreeNode
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* @flow
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*/
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'use strict';
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var invariant = require('fbjs/lib/invariant');
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var immutable = require('immutable');
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var {List} = immutable;
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/**
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* Utility to build a tree of nodes.
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* Note that this tree does not perform cyclic redundancy check
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* while appending child node.
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*/
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class NavigationTreeNode {
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__parent: ?NavigationTreeNode;
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_children: List<NavigationTreeNode>;
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_value: any;
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constructor(value: any) {
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this.__parent = null;
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this._children = new List();
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this._value = value;
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}
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getValue(): any {
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return this._value;
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}
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getParent(): ?NavigationTreeNode {
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return this.__parent;
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}
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getChildrenCount(): number {
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return this._children.size;
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}
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getChildAt(index: number): ?NavigationTreeNode {
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return index > -1 && index < this._children.size ?
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this._children.get(index) :
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null;
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}
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appendChild(child: NavigationTreeNode): void {
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if (child.__parent) {
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child.__parent.removeChild(child);
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}
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child.__parent = this;
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this._children = this._children.push(child);
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}
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removeChild(child: NavigationTreeNode): void {
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var index = this._children.indexOf(child);
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invariant(
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index > -1,
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'The node to be removed is not a child of this node.'
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);
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child.__parent = null;
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this._children = this._children.splice(index, 1);
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}
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indexOf(child: NavigationTreeNode): number {
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return this._children.indexOf(child);
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}
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forEach(callback: Function, context: any): void {
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this._children.forEach(callback, context);
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}
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map(callback: Function, context: any): Array<NavigationTreeNode> {
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return this._children.map(callback, context).toJS();
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}
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some(callback: Function, context: any): boolean {
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return this._children.some(callback, context);
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}
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}
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module.exports = NavigationTreeNode;
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