From f90067ff7ce101c81407bc8d62e6e67857100b44 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=AB=98=E4=B9=90=E5=A4=A9?= <virtoolswebplayer@gmail.com>
Date: Fri, 4 Mar 2016 16:47:25 +0800
Subject: [PATCH] ExRouter add onTransitionToTop , like ExNavigator
 transitionToTop , 
 https://github.com/aksonov/react-native-router-flux/issues/279

---
 ExRouter.js | 28 +++++++++++++++++++++++++++-
 README.md   |  2 +-
 2 files changed, 28 insertions(+), 2 deletions(-)

diff --git a/ExRouter.js b/ExRouter.js
index 8a34a0c30..c78da9533 100644
--- a/ExRouter.js
+++ b/ExRouter.js
@@ -186,11 +186,12 @@ export default class ExRouter extends React.Component {
         this.onReplace = this.onReplace.bind(this);
         this.onJump = this.onJump.bind(this);
         this.onActionSheet = this.onActionSheet.bind(this);
+        this.onTransitionToTop = this.onTransitionToTop.bind(this);
         this.state = {};
     }
 
     componentWillUnmount() {
-        if (this === Actions.currentRouter.delegate) {
+        if (Actions.currentRouter && this === Actions.currentRouter.delegate) {
             Actions.currentRouter = null;
         }
     }
@@ -267,6 +268,31 @@ export default class ExRouter extends React.Component {
         return true;
     }
 
+    onTransitionToTop(route:Route, props:{ [key: string]: any}) {
+        if (this.props.onTransitionToTop) {
+            const res = this.props.onTransitionToTop(route, props);
+            if (!res) {
+                return false;
+            }
+        }
+        const navigator = this.refs.nav;
+        let router:BaseRouter = route.parent;
+
+        // reset router stack
+        router._stack = [route.name];
+
+        // you can use navigator.transitionToTop or  navigator.immediatelyResetRouteStack + navigator.push
+        // navigator.immediatelyResetRouteStack + navigator.push is more beter ,
+        // if target route's parent(router) stack only have one route  eg ['someroute']
+
+        //navigator.transitionToTop(new ExRouteAdapter(route, props));
+
+        navigator.immediatelyResetRouteStack([]);
+        navigator.push(new ExRouteAdapter(route, props));
+
+        return true;
+    }
+
     onModal(route: Route, props:{ [key: string]: any}):boolean {
         let element = React.createElement(route.component, Object.assign({}, route.props, props));
         this.setState({modal: element});
diff --git a/README.md b/README.md
index 765418f48..e969cddac 100644
--- a/README.md
+++ b/README.md
@@ -38,7 +38,7 @@ npm i react-native-router-flux --save
 |-----------|--------|---------|--------------------------------------------|
 | name | string | required | Will be used to call screen transition, for example, `Actions.name(params)`. Must be unique. |
 | component | React.Component | semi-required | The `Component` to be displayed. Not required when defining a nested `Router` or child, see example |
-| type | string | optional | Defines how the new screen is added to the navigator stack. One of `push`, `modal`,`actionSheet`,`replace`, `switch`, `reset`.  Default is 'push'. `replace` tells navigator to replace current route with new route. `actionSheet` shows Action Sheet popup, you must pass callback as callback function, check Example for details. `modal` type inserts its 'component' after navigator component. It could be used for popup alerts as well for various needed processes before any navigator transitions (like login auth process).``switch` is used for tab screens. `reset` is similar to replace except it unmounts the componets in the navigator stack. `modal` component could be dismissed by using Actions.dismiss() |
+| type | string | optional | Defines how the new screen is added to the navigator stack. One of `push`, `modal`,`actionSheet`,`replace`, `switch`, `reset` `transitionToTop`.  Default is 'push'. `replace` tells navigator to replace current route with new route. `actionSheet` shows Action Sheet popup, you must pass callback as callback function, check Example for details. `modal` type inserts its 'component' after navigator component. It could be used for popup alerts as well for various needed processes before any navigator transitions (like login auth process).``switch` is used for tab screens. `reset` is similar to replace except it unmounts the componets in the navigator stack. `modal` component could be dismissed by using Actions.dismiss() `transitionToTop` will reset router stack ['route.name'] and with animation, if route has `sceneConfig`. eg `<Route name="login" schema="modal" component={Login} type="transitionToTop" />` |
 | initial | bool | false | Set to `true` if this is the initial screen |
 | title | string | null | The title to be displayed in the navigation bar |
 | schema | string | optional | Set this property to the name of a previously defined `Schema` to inherit its properties |