681 lines
21 KiB
JavaScript
681 lines
21 KiB
JavaScript
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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* @providesModule NavigatorIOS
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* @flow
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*/
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'use strict';
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var EventEmitter = require('EventEmitter');
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var Image = require('Image');
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var NavigationContext = require('NavigationContext');
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var RCTNavigatorManager = require('NativeModules').NavigatorManager;
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var React = require('React');
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var StaticContainer = require('StaticContainer.react');
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var StyleSheet = require('StyleSheet');
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var View = require('View');
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var invariant = require('invariant');
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var logError = require('logError');
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var requireNativeComponent = require('requireNativeComponent');
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var resolveAssetSource = require('resolveAssetSource');
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var TRANSITIONER_REF = 'transitionerRef';
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var PropTypes = React.PropTypes;
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var __uid = 0;
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function getuid() {
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return __uid++;
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}
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var NavigatorTransitionerIOS = React.createClass({
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requestSchedulingNavigation: function(cb) {
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RCTNavigatorManager.requestSchedulingJavaScriptNavigation(
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React.findNodeHandle(this),
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logError,
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cb
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);
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},
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render: function() {
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return (
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<RCTNavigator {...this.props}/>
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);
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},
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});
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type Route = {
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component: Function;
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title: string;
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passProps?: Object;
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backButtonTitle?: string;
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backButtonIcon?: Object;
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leftButtonTitle?: string;
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leftButtonIcon?: Object;
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onLeftButtonPress?: Function;
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rightButtonTitle?: string;
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rightButtonIcon?: Object;
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onRightButtonPress?: Function;
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wrapperStyle?: any;
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};
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type State = {
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idStack: Array<number>;
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routeStack: Array<Route>;
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requestedTopOfStack: number;
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observedTopOfStack: number;
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progress: number;
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fromIndex: number;
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toIndex: number;
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makingNavigatorRequest: boolean;
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updatingAllIndicesAtOrBeyond: number;
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}
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type Event = Object;
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/**
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* Think of `<NavigatorIOS>` as simply a component that renders an
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* `RCTNavigator`, and moves the `RCTNavigator`'s `requestedTopOfStack` pointer
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* forward and backward. The `RCTNavigator` interprets changes in
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* `requestedTopOfStack` to be pushes and pops of children that are rendered.
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* `<NavigatorIOS>` always ensures that whenever the `requestedTopOfStack`
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* pointer is moved, that we've also rendered enough children so that the
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* `RCTNavigator` can carry out the push/pop with those children.
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* `<NavigatorIOS>` also removes children that will no longer be needed
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* (after the pop of a child has been fully completed/animated out).
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*/
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/**
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* NavigatorIOS wraps UIKit navigation and allows you to add back-swipe
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* functionality across your app.
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*
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* #### Routes
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* A route is an object used to describe each page in the navigator. The first
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* route is provided to NavigatorIOS as `initialRoute`:
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*
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* ```
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* render: function() {
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* return (
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* <NavigatorIOS
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* initialRoute={{
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* component: MyView,
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* title: 'My View Title',
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* passProps: { myProp: 'foo' },
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* }}
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* />
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* );
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* },
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* ```
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*
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* Now MyView will be rendered by the navigator. It will recieve the route
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* object in the `route` prop, a navigator, and all of the props specified in
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* `passProps`.
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*
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* See the initialRoute propType for a complete definition of a route.
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*
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* #### Navigator
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*
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* A `navigator` is an object of navigation functions that a view can call. It
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* is passed as a prop to any component rendered by NavigatorIOS.
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*
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* ```
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* var MyView = React.createClass({
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* _handleBackButtonPress: function() {
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* this.props.navigator.pop();
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* },
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* _handleNextButtonPress: function() {
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* this.props.navigator.push(nextRoute);
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* },
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* ...
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* });
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* ```
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*
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* A navigation object contains the following functions:
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*
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* - `push(route)` - Navigate forward to a new route
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* - `pop()` - Go back one page
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* - `popN(n)` - Go back N pages at once. When N=1, behavior matches `pop()`
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* - `replace(route)` - Replace the route for the current page and immediately
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* load the view for the new route
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* - `replacePrevious(route)` - Replace the route/view for the previous page
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* - `replacePreviousAndPop(route)` - Replaces the previous route/view and
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* transitions back to it
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* - `resetTo(route)` - Replaces the top item and popToTop
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* - `popToRoute(route)` - Go back to the item for a particular route object
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* - `popToTop()` - Go back to the top item
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*
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* Navigator functions are also available on the NavigatorIOS component:
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*
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* ```
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* var MyView = React.createClass({
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* _handleNavigationRequest: function() {
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* this.refs.nav.push(otherRoute);
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* },
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* render: () => (
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* <NavigatorIOS
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* ref="nav"
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* initialRoute={...}
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* />
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* ),
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* });
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* ```
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*
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*/
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var NavigatorIOS = React.createClass({
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propTypes: {
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/**
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* NavigatorIOS uses "route" objects to identify child views, their props,
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* and navigation bar configuration. "push" and all the other navigation
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* operations expect routes to be like this:
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*/
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initialRoute: PropTypes.shape({
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/**
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* The React Class to render for this route
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*/
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component: PropTypes.func.isRequired,
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/**
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* The title displayed in the nav bar and back button for this route
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*/
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title: PropTypes.string.isRequired,
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/**
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* Specify additional props passed to the component. NavigatorIOS will
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* automatically provide "route" and "navigator" components
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*/
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passProps: PropTypes.object,
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/**
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* If set, the left header button image will appear with this source. Note
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* that this doesn't apply for the header of the current view, but the
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* ones of the views that are pushed afterward.
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*/
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backButtonIcon: Image.propTypes.source,
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/**
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* If set, the left header button will appear with this name. Note that
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* this doesn't apply for the header of the current view, but the ones
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* of the views that are pushed afterward.
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*/
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backButtonTitle: PropTypes.string,
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/**
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* If set, the left header button image will appear with this source
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*/
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leftButtonIcon: Image.propTypes.source,
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/**
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* If set, the left header button will appear with this name
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*/
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leftButtonTitle: PropTypes.string,
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/**
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* Called when the left header button is pressed
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*/
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onLeftButtonPress: PropTypes.func,
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/**
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* If set, the right header button image will appear with this source
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*/
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rightButtonIcon: Image.propTypes.source,
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/**
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* If set, the right header button will appear with this name
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*/
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rightButtonTitle: PropTypes.string,
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/**
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* Called when the right header button is pressed
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*/
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onRightButtonPress: PropTypes.func,
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/**
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* Styles for the navigation item containing the component
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*/
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wrapperStyle: View.propTypes.style,
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}).isRequired,
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/**
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* A Boolean value that indicates whether the navigation bar is hidden
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*/
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navigationBarHidden: PropTypes.bool,
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/**
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* A Boolean value that indicates whether to hide the 1px hairline shadow
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*/
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shadowHidden: PropTypes.bool,
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/**
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* The default wrapper style for components in the navigator.
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* A common use case is to set the backgroundColor for every page
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*/
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itemWrapperStyle: View.propTypes.style,
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/**
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* The color used for buttons in the navigation bar
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*/
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tintColor: PropTypes.string,
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/**
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* The background color of the navigation bar
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*/
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barTintColor: PropTypes.string,
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/**
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* The text color of the navigation bar title
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*/
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titleTextColor: PropTypes.string,
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/**
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* A Boolean value that indicates whether the navigation bar is translucent
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*/
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translucent: PropTypes.bool,
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},
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navigator: (undefined: ?Object),
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navigationContext: new NavigationContext(),
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componentWillMount: function() {
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// Precompute a pack of callbacks that's frequently generated and passed to
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// instances.
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this.navigator = {
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push: this.push,
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pop: this.pop,
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popN: this.popN,
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replace: this.replace,
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replacePrevious: this.replacePrevious,
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replacePreviousAndPop: this.replacePreviousAndPop,
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resetTo: this.resetTo,
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popToRoute: this.popToRoute,
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popToTop: this.popToTop,
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navigationContext: this.navigationContext,
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};
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this._emitWillFocus(this.state.routeStack[this.state.observedTopOfStack]);
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},
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componentDidMount: function() {
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this._emitDidFocus(this.state.routeStack[this.state.observedTopOfStack]);
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},
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componentWillUnmount: function() {
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this.navigationContext.dispose();
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this.navigationContext = new NavigationContext();
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},
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getInitialState: function(): State {
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return {
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idStack: [getuid()],
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routeStack: [this.props.initialRoute],
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// The navigation index that we wish to push/pop to.
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requestedTopOfStack: 0,
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// The last index that native has sent confirmation of completed push/pop
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// for. At this point, we can discard any views that are beyond the
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// `requestedTopOfStack`. A value of `null` means we have not received
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// any confirmation, ever. We may receive an `observedTopOfStack` without
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// ever requesting it - native can instigate pops of its own with the
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// backswipe gesture.
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observedTopOfStack: 0,
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progress: 1,
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fromIndex: 0,
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toIndex: 0,
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// Whether or not we are making a navigator request to push/pop. (Used
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// for performance optimization).
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makingNavigatorRequest: false,
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// Whether or not we are updating children of navigator and if so (not
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// `null`) which index marks the beginning of all updates. Used for
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// performance optimization.
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updatingAllIndicesAtOrBeyond: 0,
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};
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},
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_toFocusOnNavigationComplete: (undefined: any),
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_handleFocusRequest: function(item: any) {
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if (this.state.makingNavigatorRequest) {
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this._toFocusOnNavigationComplete = item;
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} else {
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this._getFocusEmitter().emit('focus', item);
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}
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},
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_focusEmitter: (undefined: ?EventEmitter),
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_getFocusEmitter: function(): EventEmitter {
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// Flow not yet tracking assignments to instance fields.
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var focusEmitter = this._focusEmitter;
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if (!focusEmitter) {
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focusEmitter = new EventEmitter();
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this._focusEmitter = focusEmitter;
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}
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return focusEmitter;
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},
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getChildContext: function(): {
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onFocusRequested: Function;
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focusEmitter: EventEmitter;
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} {
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return {
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onFocusRequested: this._handleFocusRequest,
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focusEmitter: this._getFocusEmitter(),
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};
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},
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childContextTypes: {
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onFocusRequested: React.PropTypes.func,
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focusEmitter: React.PropTypes.instanceOf(EventEmitter),
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},
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_tryLockNavigator: function(cb: () => void) {
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this.refs[TRANSITIONER_REF].requestSchedulingNavigation(
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(acquiredLock) => acquiredLock && cb()
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);
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},
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_handleNavigatorStackChanged: function(e: Event) {
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var newObservedTopOfStack = e.nativeEvent.stackLength - 1;
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this._emitDidFocus(this.state.routeStack[newObservedTopOfStack]);
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invariant(
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newObservedTopOfStack <= this.state.requestedTopOfStack,
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'No navigator item should be pushed without JS knowing about it %s %s', newObservedTopOfStack, this.state.requestedTopOfStack
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);
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var wasWaitingForConfirmation =
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this.state.requestedTopOfStack !== this.state.observedTopOfStack;
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if (wasWaitingForConfirmation) {
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invariant(
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newObservedTopOfStack === this.state.requestedTopOfStack,
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'If waiting for observedTopOfStack to reach requestedTopOfStack, ' +
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'the only valid observedTopOfStack should be requestedTopOfStack.'
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);
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}
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// Mark the most recent observation regardless of if we can lock the
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// navigator. `observedTopOfStack` merely represents what we've observed
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// and this first `setState` is only executed to update debugging
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// overlays/navigation bar.
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// Also reset progress, toIndex, and fromIndex as they might not end
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// in the correct states for a two possible reasons:
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// Progress isn't always 0 or 1 at the end, the system rounds
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// If the Navigator is offscreen these values won't be updated
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// TOOD: Revisit this decision when no longer relying on native navigator.
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var nextState = {
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observedTopOfStack: newObservedTopOfStack,
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makingNavigatorRequest: false,
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updatingAllIndicesAtOrBeyond: null,
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progress: 1,
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toIndex: newObservedTopOfStack,
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fromIndex: newObservedTopOfStack,
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};
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this.setState(nextState, this._eliminateUnneededChildren);
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},
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_eliminateUnneededChildren: function() {
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// Updating the indices that we're deleting and that's all. (Truth: Nothing
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// even uses the indices in this case, but let's make this describe the
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// truth anyways).
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var updatingAllIndicesAtOrBeyond =
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this.state.routeStack.length > this.state.observedTopOfStack + 1 ?
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this.state.observedTopOfStack + 1 :
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null;
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this.setState({
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idStack: this.state.idStack.slice(0, this.state.observedTopOfStack + 1),
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routeStack: this.state.routeStack.slice(0, this.state.observedTopOfStack + 1),
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// Now we rerequest the top of stack that we observed.
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requestedTopOfStack: this.state.observedTopOfStack,
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makingNavigatorRequest: true,
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updatingAllIndicesAtOrBeyond: updatingAllIndicesAtOrBeyond,
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});
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},
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_emitDidFocus: function(route: Route) {
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this.navigationContext.emit('didfocus', {route: route});
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},
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_emitWillFocus: function(route: Route) {
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this.navigationContext.emit('willfocus', {route: route});
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},
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push: function(route: Route) {
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invariant(!!route, 'Must supply route to push');
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// Make sure all previous requests are caught up first. Otherwise reject.
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if (this.state.requestedTopOfStack === this.state.observedTopOfStack) {
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this._tryLockNavigator(() => {
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this._emitWillFocus(route);
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var nextStack = this.state.routeStack.concat([route]);
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var nextIDStack = this.state.idStack.concat([getuid()]);
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this.setState({
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// We have to make sure that we've also supplied enough views to
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// satisfy our request to adjust the `requestedTopOfStack`.
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idStack: nextIDStack,
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routeStack: nextStack,
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requestedTopOfStack: nextStack.length - 1,
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makingNavigatorRequest: true,
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updatingAllIndicesAtOrBeyond: nextStack.length - 1,
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});
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});
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}
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},
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popN: function(n: number) {
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if (n === 0) {
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return;
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}
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// Make sure all previous requests are caught up first. Otherwise reject.
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if (this.state.requestedTopOfStack === this.state.observedTopOfStack) {
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if (this.state.requestedTopOfStack > 0) {
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this._tryLockNavigator(() => {
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var newRequestedTopOfStack = this.state.requestedTopOfStack - n;
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invariant(newRequestedTopOfStack >= 0, 'Cannot pop below 0');
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this._emitWillFocus(this.state.routeStack[newRequestedTopOfStack]);
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this.setState({
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requestedTopOfStack: newRequestedTopOfStack,
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makingNavigatorRequest: true,
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// Not actually updating the indices yet until we get the native
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// `onNavigationComplete`.
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updatingAllIndicesAtOrBeyond: null,
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});
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});
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}
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}
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},
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pop: function() {
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this.popN(1);
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},
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/**
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* Replace a route in the navigation stack.
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*
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* `index` specifies the route in the stack that should be replaced.
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* If it's negative, it counts from the back.
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*/
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replaceAtIndex: function(route: Route, index: number) {
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invariant(!!route, 'Must supply route to replace');
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if (index < 0) {
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index += this.state.routeStack.length;
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}
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if (this.state.routeStack.length <= index) {
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return;
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}
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// I don't believe we need to lock for a replace since there's no
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// navigation actually happening
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var nextIDStack = this.state.idStack.slice();
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var nextRouteStack = this.state.routeStack.slice();
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nextIDStack[index] = getuid();
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nextRouteStack[index] = route;
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this.setState({
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idStack: nextIDStack,
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routeStack: nextRouteStack,
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makingNavigatorRequest: false,
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updatingAllIndicesAtOrBeyond: index,
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});
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this._emitWillFocus(route);
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this._emitDidFocus(route);
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},
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/**
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* Replaces the top of the navigation stack.
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*/
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replace: function(route: Route) {
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this.replaceAtIndex(route, -1);
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},
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/**
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* Replace the current route's parent.
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*/
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replacePrevious: function(route: Route) {
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this.replaceAtIndex(route, -2);
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},
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popToTop: function() {
|
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this.popToRoute(this.state.routeStack[0]);
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},
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popToRoute: function(route: Route) {
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var indexOfRoute = this.state.routeStack.indexOf(route);
|
|
invariant(
|
|
indexOfRoute !== -1,
|
|
'Calling pop to route for a route that doesn\'t exist!'
|
|
);
|
|
var numToPop = this.state.routeStack.length - indexOfRoute - 1;
|
|
this.popN(numToPop);
|
|
},
|
|
|
|
replacePreviousAndPop: function(route: Route) {
|
|
// Make sure all previous requests are caught up first. Otherwise reject.
|
|
if (this.state.requestedTopOfStack !== this.state.observedTopOfStack) {
|
|
return;
|
|
}
|
|
if (this.state.routeStack.length < 2) {
|
|
return;
|
|
}
|
|
this._tryLockNavigator(() => {
|
|
this.replacePrevious(route);
|
|
this.setState({
|
|
requestedTopOfStack: this.state.requestedTopOfStack - 1,
|
|
makingNavigatorRequest: true,
|
|
});
|
|
});
|
|
},
|
|
|
|
resetTo: function(route: Route) {
|
|
invariant(!!route, 'Must supply route to push');
|
|
// Make sure all previous requests are caught up first. Otherwise reject.
|
|
if (this.state.requestedTopOfStack !== this.state.observedTopOfStack) {
|
|
return;
|
|
}
|
|
this.replaceAtIndex(route, 0);
|
|
this.popToRoute(route);
|
|
},
|
|
|
|
handleNavigationComplete: function(e: Event) {
|
|
if (this._toFocusOnNavigationComplete) {
|
|
this._getFocusEmitter().emit('focus', this._toFocusOnNavigationComplete);
|
|
this._toFocusOnNavigationComplete = null;
|
|
}
|
|
this._handleNavigatorStackChanged(e);
|
|
},
|
|
|
|
_routeToStackItem: function(route: Route, i: number) {
|
|
var Component = route.component;
|
|
var shouldUpdateChild = this.state.updatingAllIndicesAtOrBeyond !== null &&
|
|
this.state.updatingAllIndicesAtOrBeyond >= i;
|
|
|
|
return (
|
|
<StaticContainer key={'nav' + i} shouldUpdate={shouldUpdateChild}>
|
|
<RCTNavigatorItem
|
|
title={route.title}
|
|
style={[
|
|
styles.stackItem,
|
|
this.props.itemWrapperStyle,
|
|
route.wrapperStyle
|
|
]}
|
|
backButtonIcon={resolveAssetSource(route.backButtonIcon)}
|
|
backButtonTitle={route.backButtonTitle}
|
|
leftButtonIcon={resolveAssetSource(route.leftButtonIcon)}
|
|
leftButtonTitle={route.leftButtonTitle}
|
|
onNavLeftButtonTap={route.onLeftButtonPress}
|
|
rightButtonIcon={resolveAssetSource(route.rightButtonIcon)}
|
|
rightButtonTitle={route.rightButtonTitle}
|
|
onNavRightButtonTap={route.onRightButtonPress}
|
|
navigationBarHidden={this.props.navigationBarHidden}
|
|
shadowHidden={this.props.shadowHidden}
|
|
tintColor={this.props.tintColor}
|
|
barTintColor={this.props.barTintColor}
|
|
translucent={this.props.translucent !== false}
|
|
titleTextColor={this.props.titleTextColor}>
|
|
<Component
|
|
navigator={this.navigator}
|
|
route={route}
|
|
{...route.passProps}
|
|
/>
|
|
</RCTNavigatorItem>
|
|
</StaticContainer>
|
|
);
|
|
},
|
|
|
|
renderNavigationStackItems: function() {
|
|
var shouldRecurseToNavigator =
|
|
this.state.makingNavigatorRequest ||
|
|
this.state.updatingAllIndicesAtOrBeyond !== null;
|
|
// If not recursing update to navigator at all, may as well avoid
|
|
// computation of navigator children.
|
|
var items = shouldRecurseToNavigator ?
|
|
this.state.routeStack.map(this._routeToStackItem) : null;
|
|
return (
|
|
<StaticContainer shouldUpdate={shouldRecurseToNavigator}>
|
|
<NavigatorTransitionerIOS
|
|
ref={TRANSITIONER_REF}
|
|
style={styles.transitioner}
|
|
vertical={this.props.vertical}
|
|
requestedTopOfStack={this.state.requestedTopOfStack}
|
|
onNavigationComplete={this.handleNavigationComplete}>
|
|
{items}
|
|
</NavigatorTransitionerIOS>
|
|
</StaticContainer>
|
|
);
|
|
},
|
|
|
|
render: function() {
|
|
return (
|
|
<View style={this.props.style}>
|
|
{this.renderNavigationStackItems()}
|
|
</View>
|
|
);
|
|
},
|
|
});
|
|
|
|
var styles = StyleSheet.create({
|
|
stackItem: {
|
|
backgroundColor: 'white',
|
|
overflow: 'hidden',
|
|
position: 'absolute',
|
|
top: 0,
|
|
left: 0,
|
|
right: 0,
|
|
bottom: 0,
|
|
},
|
|
transitioner: {
|
|
flex: 1,
|
|
},
|
|
});
|
|
|
|
var RCTNavigator = requireNativeComponent('RCTNavigator');
|
|
var RCTNavigatorItem = requireNativeComponent('RCTNavItem');
|
|
|
|
module.exports = NavigatorIOS;
|