From 045cd0b92413895a47b7fad8627680c8fb426ed8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pau=20Ferrer=20Oca=C3=B1a?= <crazyserver@gmail.com>
Date: Thu, 10 Jun 2021 11:01:13 +0200
Subject: [PATCH 1/5] MOBILE-3320 core: Fix animations on core loading

---
 src/core/components/loading/core-loading.html  | 5 +++--
 src/core/components/loading/loading.scss       | 4 ++++
 src/core/components/loading/loading.ts         | 6 ++++++
 src/core/features/login/pages/sites/sites.html | 2 +-
 src/core/features/login/pages/sites/sites.ts   | 2 ++
 5 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/src/core/components/loading/core-loading.html b/src/core/components/loading/core-loading.html
index 7f5006545..c5b6d803b 100644
--- a/src/core/components/loading/core-loading.html
+++ b/src/core/components/loading/core-loading.html
@@ -2,7 +2,8 @@
     <ion-spinner color="primary"></ion-spinner>
     <p class="core-loading-message" *ngIf="message" role="status">{{message}}</p>
 </div>
-<div #content class="core-loading-content" [id]="uniqueId" [attr.aria-busy]="hideUntil" [@coreShowHideAnimation]>
-    <ng-content *ngIf="hideUntil">
+<div #content class="core-loading-content" [id]="uniqueId" [attr.aria-busy]="!hideUntil" [@coreShowHideAnimation]
+    [class.opacity-hide]="!hideUntil">
+    <ng-content *ngIf="loaded">
     </ng-content>
 </div>
diff --git a/src/core/components/loading/loading.scss b/src/core/components/loading/loading.scss
index 98f596285..c29e4f9b7 100644
--- a/src/core/components/loading/loading.scss
+++ b/src/core/components/loading/loading.scss
@@ -43,6 +43,10 @@
         flex-direction: column;
     }
 
+    .core-loading-content {
+        @include core-transition(opacity, 200ms);
+    }
+
     .core-loading-message {
         @include margin(10px, 0, 0, 0);
     }
diff --git a/src/core/components/loading/loading.ts b/src/core/components/loading/loading.ts
index 7b3f0743d..21aa0b8b5 100644
--- a/src/core/components/loading/loading.ts
+++ b/src/core/components/loading/loading.ts
@@ -55,6 +55,7 @@ export class CoreLoadingComponent implements OnInit, OnChanges, AfterViewInit {
 
     uniqueId: string;
     protected element: HTMLElement; // Current element.
+    loaded = false; // Only comes true once.
 
     constructor(element: ElementRef) {
         this.element = element.nativeElement;
@@ -83,6 +84,7 @@ export class CoreLoadingComponent implements OnInit, OnChanges, AfterViewInit {
         if (this.hideUntil) {
             this.element.classList.add('core-loading-loaded');
         }
+        this.loaded = !!this.hideUntil;
 
         this.content?.nativeElement.classList.toggle('core-loading-content', !!this.hideUntil);
     }
@@ -94,6 +96,10 @@ export class CoreLoadingComponent implements OnInit, OnChanges, AfterViewInit {
      */
     ngOnChanges(changes: { [name: string]: SimpleChange }): void {
         if (changes.hideUntil) {
+            if (!this.loaded) {
+                this.loaded = !!this.hideUntil; // Only comes true once.
+            }
+
             if (this.hideUntil) {
                 setTimeout(() => {
                     // Content is loaded so, center the spinner on the content itself.
diff --git a/src/core/features/login/pages/sites/sites.html b/src/core/features/login/pages/sites/sites.html
index 280e50172..b373216e3 100644
--- a/src/core/features/login/pages/sites/sites.html
+++ b/src/core/features/login/pages/sites/sites.html
@@ -34,7 +34,7 @@
                 <span class="sr-only">{{ 'core.login.sitebadgedescription' | translate:{ count: site.badge } }}</span>
             </ion-badge>
             <ion-button *ngIf="showDelete" slot="end" fill="clear" color="danger" (click)="deleteSite($event, site)"
-                [attr.aria-label]="'core.delete' | translate">
+                [attr.aria-label]="'core.delete' | translate" [@coreSlideInOut]="'fromRight'">
                 <ion-icon name="fas-trash" slot="icon-only" aria-hidden="true"></ion-icon>
             </ion-button>
         </ion-item>
diff --git a/src/core/features/login/pages/sites/sites.ts b/src/core/features/login/pages/sites/sites.ts
index 34d4e873a..e74ac1029 100644
--- a/src/core/features/login/pages/sites/sites.ts
+++ b/src/core/features/login/pages/sites/sites.ts
@@ -22,6 +22,7 @@ import { CoreLoginHelper } from '@features/login/services/login-helper';
 import { CoreNavigator } from '@services/navigator';
 import { CorePushNotifications } from '@features/pushnotifications/services/pushnotifications';
 import { CoreFilter } from '@features/filter/services/filter';
+import { CoreAnimations } from '@components/animations';
 
 /**
  * Page that displays a "splash screen" while the app is being initialized.
@@ -29,6 +30,7 @@ import { CoreFilter } from '@features/filter/services/filter';
 @Component({
     selector: 'page-core-login-sites',
     templateUrl: 'sites.html',
+    animations: [CoreAnimations.SLIDE_IN_OUT],
 })
 export class CoreLoginSitesPage implements OnInit {
 

From 182d9b5ae21b655087b4fd7435c1e36879180821 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pau=20Ferrer=20Oca=C3=B1a?= <crazyserver@gmail.com>
Date: Thu, 10 Jun 2021 11:01:21 +0200
Subject: [PATCH 2/5] MOBILE-3320 settings: Fix dark mode status bar color on
 iOS

---
 .../settings/services/settings-helper.ts      | 24 +++++++++----------
 src/core/services/app.ts                      | 11 +++++++--
 2 files changed, 20 insertions(+), 15 deletions(-)

diff --git a/src/core/features/settings/services/settings-helper.ts b/src/core/features/settings/services/settings-helper.ts
index 713407274..cad265dad 100644
--- a/src/core/features/settings/services/settings-helper.ts
+++ b/src/core/features/settings/services/settings-helper.ts
@@ -63,8 +63,11 @@ export class CoreSettingsHelperProvider {
     protected syncPromises: { [s: string]: Promise<void> } = {};
     protected prefersDark?: MediaQueryList;
     protected colorSchemes: CoreColorScheme[] = [];
+    protected currentColorScheme = CoreColorScheme.LIGHT;
 
     constructor() {
+        this.prefersDark = window.matchMedia('(prefers-color-scheme: dark)');
+
         if (!CoreConstants.CONFIG.forceColorScheme) {
             // Update color scheme when a user enters or leaves a site, or when the site info is updated.
             const applySiteScheme = (): void => {
@@ -72,7 +75,6 @@ export class CoreSettingsHelperProvider {
                     // Dark mode is disabled, force light mode.
                     this.setColorScheme(CoreColorScheme.LIGHT);
                 } else {
-                    this.prefersDark = window.matchMedia('(prefers-color-scheme: dark)');
                     // Reset color scheme settings.
                     this.initColorScheme();
                 }
@@ -86,7 +88,12 @@ export class CoreSettingsHelperProvider {
                 // Reset color scheme settings.
                 this.initColorScheme();
             });
+        } else {
+            this.initColorScheme();
         }
+
+        // Listen for changes to the prefers-color-scheme media query.
+        this.prefersDark.addEventListener && this.prefersDark.addEventListener('change', this.toggleDarkModeListener.bind(this));
     }
 
     /**
@@ -432,17 +439,10 @@ export class CoreSettingsHelperProvider {
      * @param colorScheme Name of the color scheme.
      */
     setColorScheme(colorScheme: CoreColorScheme): void {
+        this.currentColorScheme = colorScheme;
         if (colorScheme == CoreColorScheme.SYSTEM && this.prefersDark) {
-            // Listen for changes to the prefers-color-scheme media query.
-            this.prefersDark.addEventListener &&
-                this.prefersDark.addEventListener('change', this.toggleDarkModeListener);
-
             this.toggleDarkMode(this.prefersDark.matches);
         } else {
-            // Stop listening to changes.
-            this.prefersDark?.removeEventListener &&
-                this.prefersDark?.removeEventListener('change', this.toggleDarkModeListener);
-
             this.toggleDarkMode(colorScheme == CoreColorScheme.DARK);
         }
     }
@@ -460,11 +460,9 @@ export class CoreSettingsHelperProvider {
 
     /**
      * Listener function to toggle dark mode.
-     *
-     * @param e Event object.
      */
-    protected toggleDarkModeListener = (e: MediaQueryListEvent): void => {
-        document.body.classList.toggle('dark', e.matches);
+    protected toggleDarkModeListener(): void {
+        this.setColorScheme(this.currentColorScheme);
     };
 
     /**
diff --git a/src/core/services/app.ts b/src/core/services/app.ts
index a44ba3c64..7febb968a 100644
--- a/src/core/services/app.ts
+++ b/src/core/services/app.ts
@@ -654,10 +654,17 @@ export class CoreAppProvider {
 
         const useLightText = CoreColors.isWhiteContrastingBetter(color);
         const statusBar = StatusBar.instance;
-        statusBar.backgroundColorByHexString(color);
-        useLightText ? statusBar.styleLightContent() : statusBar.styleDefault();
 
         this.isIOS() && statusBar.overlaysWebView(false);
+
+        // styleDefault will use white text on iOS when darkmode is on. Force the background to black.
+        if (this.isIOS() && !useLightText && window.matchMedia('(prefers-color-scheme: dark)').matches) {
+            statusBar.backgroundColorByHexString('#000000');
+            statusBar.styleLightContent();
+        } else {
+            statusBar.backgroundColorByHexString(color);
+            useLightText ? statusBar.styleLightContent() : statusBar.styleDefault();
+        }
     }
 
     /**

From 67e6a45b2d1e1c9f21cba492b179cb725bc7c17a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pau=20Ferrer=20Oca=C3=B1a?= <crazyserver@gmail.com>
Date: Thu, 10 Jun 2021 15:37:10 +0200
Subject: [PATCH 3/5] MOBILE-3320 style: Fix quiz styles

---
 .../ddwtos/component/addon-qtype-ddwtos.html  | 20 ++++++++++---------
 src/addons/qtype/ddwtos/component/ddwtos.scss |  1 +
 src/theme/components/format-text.scss         |  1 -
 3 files changed, 12 insertions(+), 10 deletions(-)

diff --git a/src/addons/qtype/ddwtos/component/addon-qtype-ddwtos.html b/src/addons/qtype/ddwtos/component/addon-qtype-ddwtos.html
index 86b733857..39222c454 100644
--- a/src/addons/qtype/ddwtos/component/addon-qtype-ddwtos.html
+++ b/src/addons/qtype/ddwtos/component/addon-qtype-ddwtos.html
@@ -1,4 +1,4 @@
-<div *ngIf="ddQuestion && (ddQuestion.text || ddQuestion.text === '')" class="addon-qtype-ddwtos-container">
+<div *ngIf="ddQuestion && (ddQuestion.text || ddQuestion.text === '')">
     <!-- Content is outside the core-loading to let the script calculate drag items position -->
     <core-loading [hideUntil]="ddQuestion.loaded"></core-loading>
 
@@ -10,16 +10,18 @@
                     <ion-label>{{ 'core.question.howtodraganddrop' | translate }}</ion-label>
                 </ion-item>
             </ion-card>
-            <core-format-text [component]="component" [componentId]="componentId" [text]="ddQuestion.text"
-                [contextLevel]="contextLevel" [contextInstanceId]="contextInstanceId" [courseId]="courseId" #questiontext
-                (afterRender)="textRendered()">
-            </core-format-text>
+            <div class="addon-qtype-ddwtos-container">
+                <core-format-text [component]="component" [componentId]="componentId" [text]="ddQuestion.text"
+                    [contextLevel]="contextLevel" [contextInstanceId]="contextInstanceId" [courseId]="courseId" #questiontext
+                    (afterRender)="textRendered()">
+                </core-format-text>
 
-            <core-format-text *ngIf="ddQuestion.answers" [component]="component" [componentId]="componentId"
-                [text]="ddQuestion.answers" [filter]="false" (afterRender)="answersRendered()">
-            </core-format-text>
+                <core-format-text *ngIf="ddQuestion.answers" [component]="component" [componentId]="componentId"
+                    [text]="ddQuestion.answers" [filter]="false" (afterRender)="answersRendered()">
+                </core-format-text>
 
-            <div class="drags"></div>
+                <div class="drags"></div>
+            </div>
         </ion-label>
     </ion-item>
 </div>
diff --git a/src/addons/qtype/ddwtos/component/ddwtos.scss b/src/addons/qtype/ddwtos/component/ddwtos.scss
index e5b4ccfb5..bc6bc852b 100644
--- a/src/addons/qtype/ddwtos/component/ddwtos.scss
+++ b/src/addons/qtype/ddwtos/component/ddwtos.scss
@@ -3,6 +3,7 @@
 // Style ddwtos content a bit. Almost all these styles are copied from Moodle.
 .addon-qtype-ddwtos-container {
     min-height: 80px; // To display the loading.
+    position: relative;
 }
 
 core-format-text ::ng-deep, .drags ::ng-deep {
diff --git a/src/theme/components/format-text.scss b/src/theme/components/format-text.scss
index 9046fa194..423de0eaa 100644
--- a/src/theme/components/format-text.scss
+++ b/src/theme/components/format-text.scss
@@ -338,7 +338,6 @@ core-rich-text-editor .core-rte-editor {
     select,
     input:not([type=checkbox]):not([type=radio]):not([type=hidden]) {
         height: 30px;
-        line-height: 30px;
         display: inline-block;
         border: 1px solid var(--gray-dark);
         background: var(--background-contrast);

From a21c7597d798ced0930ae8203d94dde820ff6db4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pau=20Ferrer=20Oca=C3=B1a?= <crazyserver@gmail.com>
Date: Thu, 10 Jun 2021 16:33:30 +0200
Subject: [PATCH 4/5] MOBILE-3320 survey: Improve radio buttons a11y

---
 .../survey/components/index/addon-mod-survey-index.html    | 7 ++++---
 src/addons/mod/survey/components/index/index.scss          | 6 ++++++
 src/theme/components/format-text.scss                      | 5 +++++
 3 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/src/addons/mod/survey/components/index/addon-mod-survey-index.html b/src/addons/mod/survey/components/index/addon-mod-survey-index.html
index 6f024a1d5..c3f2ea353 100644
--- a/src/addons/mod/survey/components/index/addon-mod-survey-index.html
+++ b/src/addons/mod/survey/components/index/addon-mod-survey-index.html
@@ -79,7 +79,7 @@
 
                 <!-- Subquestion -->
                 <ion-radio-group [(ngModel)]="answers[question.name]" [required]="question.required" [name]="question.name">
-                    <ion-row *ngIf="question.parent !== 0" class="ion-align-items-center ion-padding" [class.even]="isEven">
+                    <ion-row *ngIf="question.parent !== 0" class="ion-align-items-center ion-padding-horizontal" [class.even]="isEven">
 
                         <ion-col size="7">
                             <ion-label id="addon-mod_survey-{{question.id}}">
@@ -91,9 +91,10 @@
 
                         <!-- Tablet view: radio buttons -->
                         <ion-col class="ion-hide-md-down ion-text-center" size="1"
-                            *ngFor="let option of question.optionsArray; let value=index;">
+                            *ngFor="let option of question.optionsArray; let value=index;"
+                            >
                             <!-- Empty slot to avoid errors on migration tslint checks -->
-                            <ion-radio [value]="value + 1" [attr.aria-labelledby]="'addon-mod_survey-'+question.id" slot="">
+                            <ion-radio [value]="value + 1" [attr.aria-label]="question.num + '. '+question.text + ': ' + option">
                             </ion-radio>
                         </ion-col>
                         <ion-col class="ion-hide-md-up" size="5">
diff --git a/src/addons/mod/survey/components/index/index.scss b/src/addons/mod/survey/components/index/index.scss
index 261e20841..87933f475 100644
--- a/src/addons/mod/survey/components/index/index.scss
+++ b/src/addons/mod/survey/components/index/index.scss
@@ -17,6 +17,12 @@
     .even {
         background-color: var(--even-background);
     }
+
+    ion-radio {
+        height: var(--a11y-min-target-size);
+        width: var(--a11y-min-target-size);
+        padding: 12px;
+    }
 }
 
 :host-context(body.dark) {
diff --git a/src/theme/components/format-text.scss b/src/theme/components/format-text.scss
index 423de0eaa..06176a466 100644
--- a/src/theme/components/format-text.scss
+++ b/src/theme/components/format-text.scss
@@ -180,6 +180,11 @@ core-format-text {
         ion-icon {
             flex: 1;
             align-self: center;
+            /** Fix iOS icon size */
+            margin: 0 auto;
+            position: absolute;
+            left: 0;
+            right: 0;
         }
 
         &:hover {

From 21d968c84e9a4931e4688e75a4d91da4f8433844 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pau=20Ferrer=20Oca=C3=B1a?= <crazyserver@gmail.com>
Date: Thu, 10 Jun 2021 18:51:51 +0200
Subject: [PATCH 5/5] MOBILE-3320 core: Prevent flickering on tab scrolling

---
 src/core/classes/tabs.ts | 25 ++++++++++++-------------
 1 file changed, 12 insertions(+), 13 deletions(-)

diff --git a/src/core/classes/tabs.ts b/src/core/classes/tabs.ts
index ddacb08bb..285a47660 100644
--- a/src/core/classes/tabs.ts
+++ b/src/core/classes/tabs.ts
@@ -61,7 +61,6 @@ export class CoreTabsBaseComponent<T extends CoreTabBase> implements OnInit, Aft
     numTabsShown = 0;
     direction = 'ltr';
     description = '';
-    lastScroll = 0;
     slidesOpts = {
         initialSlide: 0,
         slidesPerView: 3,
@@ -89,6 +88,8 @@ export class CoreTabsBaseComponent<T extends CoreTabBase> implements OnInit, Aft
     protected slidesSwiper: any; // eslint-disable-line @typescript-eslint/no-explicit-any
     protected slidesSwiperLoaded = false;
     protected scrollElements: Record<string | number, HTMLElement> = {}; // Scroll elements for each loaded tab.
+    protected lastScroll = 0;
+    protected previousLastScroll = 0;
 
     tabAction: CoreTabsRoleTab<T>;
 
@@ -164,6 +165,7 @@ export class CoreTabsBaseComponent<T extends CoreTabBase> implements OnInit, Aft
             this.tabBarElement!.classList.remove('tabs-hidden');
             if (scroll === 0) {
                 this.tabBarElement!.style.height = '';
+                this.previousLastScroll = this.lastScroll;
                 this.lastScroll = 0;
             } else if (scroll !== undefined) {
                 this.tabBarElement!.style.height = (this.tabBarHeight - scroll) + 'px';
@@ -253,17 +255,13 @@ export class CoreTabsBaseComponent<T extends CoreTabBase> implements OnInit, Aft
             return;
         }
 
-        if (!this.tabsShown) {
-            if (window.innerHeight >= CoreTabsBaseComponent.MAX_HEIGHT_TO_HIDE_TABS) {
-                // Ensure tabbar is shown.
-                this.tabsShown = true;
-                this.tabBarElement?.classList.remove('tabs-hidden');
-                this.lastScroll = 0;
-                this.calculateTabBarHeight();
-            } else {
-                // Don't recalculate.
-                return;
-            }
+        if (window.innerHeight >= CoreTabsBaseComponent.MAX_HEIGHT_TO_HIDE_TABS) {
+            // Ensure tabbar is shown.
+            this.applyScroll(true, 0);
+            this.calculateTabBarHeight();
+        } else if (!this.tabsShown) {
+            // Don't recalculate.
+            return;
         }
 
         await this.calculateMaxSlides();
@@ -504,7 +502,7 @@ export class CoreTabsBaseComponent<T extends CoreTabBase> implements OnInit, Aft
             return;
         }
 
-        if (scrollTop == this.lastScroll) {
+        if (scrollTop == this.lastScroll || scrollTop == this.previousLastScroll) {
             // Ensure scroll has been modified to avoid flicks.
             return;
         }
@@ -522,6 +520,7 @@ export class CoreTabsBaseComponent<T extends CoreTabBase> implements OnInit, Aft
         }
 
         // Use lastScroll after moving the tabs to avoid flickering.
+        this.previousLastScroll = this.lastScroll;
         this.lastScroll = scrollTop;
     }