From 8d3ce8d29c9abd89ce47c882e0d7b2ac0f861966 Mon Sep 17 00:00:00 2001
From: Liam DeBeasi <liamdebeasi@users.noreply.github.com>
Date: Mon, 24 Feb 2020 11:22:07 -0500
Subject: [PATCH] fix(modal): allow swipe to close animation to be overridden
 (#20585)

fixes #20577
---
 core/src/components/modal/modal.tsx           |  7 ++-
 .../src/components/modal/test/spec/index.html | 55 ++++++++++++++++++-
 core/src/utils/overlays.ts                    |  5 +-
 3 files changed, 59 insertions(+), 8 deletions(-)

diff --git a/core/src/components/modal/modal.tsx b/core/src/components/modal/modal.tsx
index c135844c89..b7386cb376 100644
--- a/core/src/components/modal/modal.tsx
+++ b/core/src/components/modal/modal.tsx
@@ -1,5 +1,6 @@
 import { Component, ComponentInterface, Element, Event, EventEmitter, Host, Method, Prop, h } from '@stencil/core';
 
+import { config } from '../../global/config';
 import { getIonMode } from '../../global/ionic-global';
 import { Animation, AnimationBuilder, ComponentProps, ComponentRef, FrameworkDelegate, Gesture, OverlayEventDetail, OverlayInterface } from '../../interface';
 import { attachComponent, detachComponent } from '../../utils/framework-delegate';
@@ -150,7 +151,8 @@ export class Modal implements ComponentInterface, OverlayInterface {
       // All of the elements needed for the swipe gesture
       // should be in the DOM and referenced by now, except
       // for the presenting el
-      const ani = this.animation = iosLeaveAnimation(this.el, this.presentingElement);
+      const animationBuilder = this.leaveAnimation || config.get('modalLeave', iosLeaveAnimation);
+      const ani = this.animation = animationBuilder(this.el, this.presentingElement);
       this.gesture = createSwipeToCloseGesture(
         this.el,
         ani,
@@ -188,9 +190,8 @@ export class Modal implements ComponentInterface, OverlayInterface {
       return false;
     }
 
-    const iosAni = (this.animation === undefined || (role === BACKDROP || role === undefined)) ? iosLeaveAnimation : undefined;
     const enteringAnimation = activeAnimations.get(this) || [];
-    const dismissed = await dismiss(this, data, role, 'modalLeave', iosAni, mdLeaveAnimation, this.presentingElement);
+    const dismissed = await dismiss(this, data, role, 'modalLeave', iosLeaveAnimation, mdLeaveAnimation, this.presentingElement);
 
     if (dismissed) {
       await detachComponent(this.delegate, this.usersElement);
diff --git a/core/src/components/modal/test/spec/index.html b/core/src/components/modal/test/spec/index.html
index 95670f940e..567126c486 100644
--- a/core/src/components/modal/test/spec/index.html
+++ b/core/src/components/modal/test/spec/index.html
@@ -13,8 +13,9 @@
   <script nomodule src="../../../../../dist/ionic/ionic.js"></script>
   <script type="module" src="../../../../../dist/ionic/ionic.esm.js"></script>
   <script type="module">
-    import { modalController } from '../../../../dist/ionic/index.esm.js';
+    import { modalController, createAnimation } from '../../../../dist/ionic/index.esm.js';
     window.modalController = modalController;
+    window.createAnimation = createAnimation;
   </script>
   <style>
   #modal-header {
@@ -33,7 +34,7 @@
     font-size: 11px;
     color: #111;
   }
-  
+
   ion-list ion-icon {
     width: 100%;
     height: 100%;
@@ -57,6 +58,11 @@
       </ion-header>
 
       <ion-content>
+        <ion-item>
+          <ion-label>Use Custom Animation</ion-label>
+          <ion-toggle></ion-toggle>
+        </ion-item>
+
         <ion-list id="list"></ion-list>
       </ion-content>
     </div>
@@ -66,6 +72,44 @@
     window.addEventListener("ionModalDidDismiss", function (e) { console.log('DidDismiss', e) })
     window.addEventListener("ionModalWillDismiss", function (e) { console.log('WillDismiss', e) })
 
+    const enterAnimation = (baseEl) => {
+      const backdropAnimation = createAnimation()
+        .addElement(baseEl.querySelector('ion-backdrop'))
+        .fromTo('opacity', '0.01', '0.4');
+
+      const wrapperAnimation = createAnimation()
+        .addElement(baseEl.querySelector('.modal-wrapper'))
+        .keyframes([
+          { offset: 0, opacity: '0', transform: 'scale(0)' },
+          { offset: 1, opacity: '0.99', transform: 'scale(1)' }
+        ]);
+
+      return createAnimation()
+        .addElement(baseEl)
+        .easing('ease-out')
+        .duration(500)
+        .addAnimation([backdropAnimation, wrapperAnimation]);
+    }
+
+    const leaveAnimation = (baseEl) => {
+      const backdropAnimation = createAnimation()
+        .addElement(baseEl.querySelector('ion-backdrop'))
+        .fromTo('opacity', '0.4', '0.01');
+
+      const wrapperAnimation = createAnimation()
+        .addElement(baseEl.querySelector('.modal-wrapper'))
+        .keyframes([
+          { offset: 0, opacity: '0.99', transform: 'scale(1)' },
+          { offset: 1, opacity: '0', transform: 'scale(0)' }
+        ]);
+
+      return createAnimation()
+        .addElement(baseEl)
+        .easing('ease-out')
+        .duration(500)
+        .addAnimation([backdropAnimation, wrapperAnimation]);
+    }
+
     const people = [
       {
           "name": "Miyah Myles",
@@ -450,11 +494,16 @@
 
         presentModal(topModal);
       });
+
+
+      const toggle = document.querySelector('ion-toggle');
       // present the modal
       const modalElement = await modalController.create({
         presentingElement: presentingEl,
         component: element,
-        swipeToClose: true
+        swipeToClose: true,
+        enterAnimation: (toggle.checked) ? enterAnimation : undefined,
+        leaveAnimation: (toggle.checked) ? leaveAnimation : undefined,
       });
       return modalElement;
     }
diff --git a/core/src/utils/overlays.ts b/core/src/utils/overlays.ts
index 33e386dc87..bfae599df2 100644
--- a/core/src/utils/overlays.ts
+++ b/core/src/utils/overlays.ts
@@ -142,7 +142,7 @@ export const dismiss = async (
   data: any | undefined,
   role: string | undefined,
   name: keyof IonicConfig,
-  iosLeaveAnimation: AnimationBuilder | undefined,
+  iosLeaveAnimation: AnimationBuilder,
   mdLeaveAnimation: AnimationBuilder,
   opts?: any
 ): Promise<boolean> => {
@@ -158,7 +158,8 @@ export const dismiss = async (
       ? overlay.leaveAnimation
       : config.get(name, overlay.mode === 'ios' ? iosLeaveAnimation : mdLeaveAnimation);
 
-    if (animationBuilder !== undefined) {
+    // If dismissed via gesture, no need to play leaving animation again
+    if (role !== 'gesture') {
       await overlayAnimation(overlay, animationBuilder, overlay.el, opts);
     }
     overlay.didDismiss.emit({ data, role });