fix(vue): improve swipe to go back reliability

packages/vue/src/components/IonRouterOutlet.ts

@@ -10,14 +10,13 @@ import {
   InjectionKey
 } from 'vue';
 import { AnimationBuilder } from '@ionic/core';
-import { useRoute, useRouter } from 'vue-router';
+import { useRoute } from 'vue-router';
 import { fireLifecycle, generateId, LIFECYCLE_DID_ENTER, LIFECYCLE_DID_LEAVE, LIFECYCLE_WILL_ENTER, LIFECYCLE_WILL_LEAVE } from '../utils';
 
 let viewDepthKey: InjectionKey<0> = Symbol(0);
 export const IonRouterOutlet = defineComponent({
   name: 'IonRouterOutlet',
   setup(_, { attrs }) {
-    const vueRouter = useRouter();
     const route = useRoute();
     const depth = inject(viewDepthKey, 0);
 
@@ -57,13 +56,22 @@ export const IonRouterOutlet = defineComponent({
 
     const canStart = () => {
       const stack = viewStacks.getViewStack(id);
-      return stack && stack.length > 1;
+      if (!stack || stack.length <= 1) return false;
+
+      /**
+       * We only want to outlet of the entering view
+       * to respond to this gesture, so check
+       * to make sure the view is in the outlet we want.
+       */
+      const routeInfo = ionRouter.getCurrentRouteInfo();
+      const enteringViewItem = viewStacks.findViewItemByRouteInfo({ pathname: routeInfo.pushedByRoute }, id);
+
+      return !!enteringViewItem;
     }
     const onStart = async () => {
       const routeInfo = ionRouter.getCurrentRouteInfo();
       const { routerAnimation } = routeInfo;
-      const items = viewStacks.getViewStack(id);
-      const enteringViewItem = items[items.length - 2];
+      const enteringViewItem = viewStacks.findViewItemByRouteInfo({ pathname: routeInfo.pushedByRoute }, id);
       const leavingViewItem = viewStacks.findViewItemByRouteInfo(routeInfo, id);
 
       if (leavingViewItem) {
@@ -105,7 +113,23 @@ export const IonRouterOutlet = defineComponent({
     const onEnd = (shouldContinue: boolean) => {
       if (shouldContinue) {
         skipTransition = true;
-        vueRouter.back();
+
+        /**
+         * Use the same logic as clicking
+         * ion-back-button to determine where
+         * to go back to.
+         */
+        ionRouter.handleNavigateBack();
+      } else {
+        /**
+         * In the event that the swipe
+         * gesture was aborted, we should
+         * re-hide the page that was going to enter.
+         */
+        const routeInfo = ionRouter.getCurrentRouteInfo();
+        const enteringViewItem = viewStacks.findViewItemByRouteInfo({ pathname: routeInfo.pushedByRoute }, id);
+        enteringViewItem.ionPageElement.setAttribute('aria-hidden', 'true');
+        enteringViewItem.ionPageElement.classList.add('ion-page-hidden');
       }
     }
 

packages/vue/test-app/package.json

@@ -11,8 +11,8 @@
     "cypress": "node_modules/.bin/cypress run --headless --browser chrome"
   },
   "dependencies": {
-    "@ionic/vue": "5.4.0-dev.202010081632.d371af4",
-    "@ionic/vue-router": "5.4.0-dev.202010081632.d371af4",
+    "@ionic/vue": "5.4.0-dev.202010091911.bfc0b25",
+    "@ionic/vue-router": "5.4.0-dev.202010091911.bfc0b25",
     "core-js": "^3.6.5",
     "vue": "^3.0.0-0",
     "vue-router": "^4.0.0-0"

packages/vue/test-app/src/views/Tabs.vue

@@ -1,7 +1,7 @@
 <template>
   <ion-page data-pageid="tabs">
     <ion-content>
-      <ion-tabs>
+      <ion-tabs id="tabs">
         <ion-tab-bar slot="bottom">
           <ion-tab-button tab="tab1" href="/tabs/tab1">
             <ion-icon :icon="triangle" />

packages/vue/test-app/tests/e2e/specs/navigation.js

@@ -1,20 +1,4 @@
 describe('Navigation', () => {
-
- /*
- // TODO move these to separate describe block
- it.skip('should swipe and abort', () => {
-    cy.ionPageInvisible('home');
-    cy.ionSwipeToGoBack();
-    cy.ionPageInvisible('home');
-    cy.ionPageVisible('navigation');
-  });
-
-  it.skip('should swipe and complete', () => {
-    cy.ionSwipeToGoBack(true);
-    cy.ionPageVisible('home');
-  });
-  */
-
   it('should go to sibling page', () => {
     cy.visit('http://localhost:8080');
     cy.get('ion-item#navigation').click();
@@ -64,3 +48,27 @@ describe('Navigation', () => {
     cy.ionPageDoesNotExist('navigationchild')
   })
 });
+
+describe('Navigation - Swipe to Go Back', () => {
+  beforeEach(() => {
+    cy.viewport(320, 568);
+    cy.visit('http://localhost:8080?ionic:mode=ios');
+    cy.get('#navigation').click();
+    cy.ionPageHidden('home');
+    cy.ionPageVisible('navigation')
+  });
+
+  it('should swipe and abort', () => {
+    cy.ionSwipeToGoBack();
+    cy.ionPageHidden('home');
+    cy.ionPageVisible('navigation');
+  });
+
+  it('should swipe and complete', () => {
+    cy.ionSwipeToGoBack(true);
+    cy.ionPageVisible('home');
+
+    // TODO: Vue router does not go back in cypress with router.back()
+    //cy.ionPageDoesNotExist('navigation');
+  });
+})

packages/vue/test-app/tests/e2e/specs/tabs.js

@@ -66,3 +66,71 @@ describe('Tabs', () => {
     cy.ionPageDoesNotExist('tabs');
   });
 })
+
+describe('Tabs - Swipe to Go Back', () => {
+  beforeEach(() => {
+    cy.viewport(320, 568);
+    cy.visit('http://localhost:8080?ionic:mode=ios');
+    cy.get('#tabs').click();
+    cy.ionPageHidden('home');
+    cy.ionPageVisible('tab1')
+  });
+
+  it('should swipe and abort', () => {
+    cy.ionSwipeToGoBack();
+    cy.ionPageHidden('home');
+    cy.ionPageVisible('tab1');
+  });
+
+  it('should swipe and go back to home', () => {
+    cy.ionSwipeToGoBack(true);
+    cy.ionPageVisible('home');
+
+    // TODO: Vue router does not go back in cypress with router.back()
+    //cy.ionPageDoesNotExist('tabs1');
+  });
+
+  it('should swipe and abort within a tab', () => {
+    cy.get('#child-one').click();
+    cy.ionPageVisible('tab1childone');
+    cy.ionPageHidden('tab1');
+
+    cy.ionSwipeToGoBack(false, 'ion-tabs#tabs ion-router-outlet');
+
+    cy.ionPageHidden('tab1');
+    cy.ionPageVisible('tab1childone');
+  });
+
+  it('should swipe and go back within a tab', () => {
+    cy.get('#child-one').click();
+    cy.ionPageVisible('tab1childone');
+    cy.ionPageHidden('tab1');
+
+    cy.ionSwipeToGoBack(true, 'ion-tabs#tabs ion-router-outlet');
+
+    cy.ionPageVisible('tab1');
+    cy.ionPageDoesNotExist('tab1childone');
+  });
+
+  it('should swipe and go back to correct tab after switching tabs', () => {
+    cy.get('#child-one').click();
+    cy.ionPageVisible('tab1childone');
+    cy.ionPageHidden('tab1');
+
+    cy.get('ion-tab-button#tab-button-tab2').click();
+    cy.ionPageVisible('tab2');
+    cy.ionPageHidden('tab1childone');
+
+    cy.get('ion-tab-button#tab-button-tab1').click();
+    cy.ionPageVisible('tab1childone');
+    cy.ionPageHidden('tab2');
+
+    cy.ionSwipeToGoBack(true, 'ion-tabs#tabs ion-router-outlet');
+
+    cy.ionPageVisible('tab1');
+    cy.ionPageDoesNotExist('tab1childone');
+
+    cy.ionSwipeToGoBack(true, 'ion-tabs#tabs ion-router-outlet');
+    cy.ionPageVisible('home');
+  });
+})

packages/vue/test-app/tests/e2e/support/commands.js

@@ -24,11 +24,20 @@
 // -- This is will overwrite an existing command --
 // Cypress.Commands.overwrite("visit", (originalFn, url, options) => { ... })
 
-Cypress.Commands.add('ionSwipeToGoBack', (complete = false) => {
-  cy.get('ion-router-outlet')
-    .trigger('mousedown', { position: "left" })
-    .trigger('mousemove', { clientX: (complete) ? 100 : 300, clientY: 275 })
-    .trigger('mouseup', { force: true })
+Cypress.Commands.add('ionSwipeToGoBack', (complete = false, selector = 'ion-router-outlet') => {
+  const increment = (complete) ? 60 : 25;
+  cy.get(selector)
+    .first()
+    .trigger('mousedown', 0, 275, { which: 1, force: true })
+    .trigger('mousemove', increment * 1, 275, { which: 1, force: true })
+    .wait(50)
+    .trigger('mousemove', increment * 2, 275, { which: 1, force: true })
+    .wait(50)
+    .trigger('mousemove', increment * 3, 275, { which: 1, force: true })
+    .wait(50)
+    .trigger('mousemove', increment * 4, 275, { which: 1, force: true })
+    .wait(50)
+    .trigger('mouseup', increment * 4, 275, { which: 1, force: true })
   cy.wait(150);
 })