MOBILE-3631 core: Add splitview placeholder page

src/core/components/split-view/split-view.html

@@ -1,5 +1,7 @@
 <ion-content class="menu">
     <ng-content></ng-content>
 </ion-content>
-<ion-router-outlet class="content"></ion-router-outlet>
+<ion-router-outlet class="content-outlet"></ion-router-outlet>
-<!-- @todo placeholder -->
+<core-empty-box class="content-placeholder" icon="fas-arrow-circle-left" [message]="placeholderText | translate"
+    [flipIconRtl]="true">
+</core-empty-box>

src/core/components/split-view/split-view.scss

@@ -1,11 +1,13 @@
-// @todo RTL layout
-
 :host {
     --menu-min-width: 270px;
     --menu-max-width: 28%;
+    --menu-box-shadow: var(--core-menu-box-shadow-end);
+    --menu-z: 2;
+    --menu-border-width: 1;
     --menu-display: flex;
     --content-display: block;
-    --border-width: 1;
+    --content-outlet-display: none;
+    --content-placeholder-display: var(--content-display);
 
     top: 0;
     right: 0;
@@ -17,58 +19,74 @@
     flex-direction: row;
     flex-wrap: nowrap;
     contain: strict;
-}
 
-:host(.menu-only) {
+    .menu,
-    --menu-min-width: 0;
+    .content-outlet {
-    --menu-max-width: 100%;
-    --content-display: none;
-    --border-width: 0;
-}
-
-:host(.content-only) {
-    --menu-display: none;
-    --border-width: 0;
-}
-
-:host-context(ion-app.md) {
-    --border: calc(var(--border-width) * 1px) solid var(--ion-item-border-color, var(--ion-border-color, var(--ion-color-step-150, rgba(0, 0, 0, .13))));
-}
-
-:host-context(ion-app.ios) {
-    --border: calc(var(--border-width) * .55px) solid var(--ion-item-border-color, var(--ion-border-color, var(--ion-color-step-250, #c8c7cc)));
-}
-
-.menu,
-.content {
         top: 0;
         right: 0;
         bottom: 0;
         left: 0;
         position: relative;
-    box-shadow: none !important;
+        box-shadow: none;
         z-index: 0;
-}
+    }
 
-.menu {
+    .menu {
+        box-shadow: var(--menu-box-shadow);
+        z-index: var(--menu-z);
         display: var(--menu-display);
         flex-shrink: 0;
         order: -1;
-    border-left: unset;
+        width: 100%;
-    border-right: unset;
         border-inline-start: 0;
         border-inline-end: var(--border);
         min-width: var(--menu-min-width);
         max-width: var(--menu-max-width);
-    width: 100%;
+    }
-}
 
-.content {
+    .content-outlet {
-    display: var(--content-display);
+        display: var(--content-outlet-display);
         flex: 1;
 
         ::ng-deep ion-header {
             display: none;
         }
 
+    }
+
+    .content-placeholder {
+        display: var(--content-placeholder-display);
+        flex: 1;
+        position: relative;
+        background-color: var(--ion-background);
+    }
+
+}
+
+:host(.menu-only) {
+    --menu-min-width: 0;
+    --menu-max-width: 100%;
+    --content-display: none;
+    --menu-border-width: 0;
+    --menu-box-shadow: none;
+    --menu-z: 0;
+    --selected-item-border-width: 0;
+}
+
+:host(.content-only) {
+    --menu-display: none;
+    --menu-border-width: 0;
+}
+
+:host(.outlet-activated) {
+    --content-placeholder-display: none;
+    --content-outlet-display: var(--content-display);
+}
+
+:host-context(ion-app.md) {
+    --border: calc(var(--menu-border-width) * 1px) solid var(--ion-item-border-color, var(--ion-border-color, var(--ion-color-step-150, rgba(0, 0, 0, .13))));
+}
+
+:host-context(ion-app.ios) {
+    --border: calc(var(--menu-border-width) * .55px) solid var(--ion-item-border-color, var(--ion-border-color, var(--ion-color-step-250, #c8c7cc)));
 }

src/core/components/split-view/split-view.ts

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-import { AfterViewInit, Component, ElementRef, HostBinding, OnDestroy, ViewChild } from '@angular/core';
+import { AfterViewInit, Component, ElementRef, HostBinding, Input, OnDestroy, ViewChild } from '@angular/core';
 import { IonRouterOutlet } from '@ionic/angular';
 import { CoreScreen } from '@services/screen';
 import { Subscription } from 'rxjs';
@@ -32,6 +32,7 @@ export class CoreSplitViewComponent implements AfterViewInit, OnDestroy {
 
     @ViewChild(IonRouterOutlet) outlet!: IonRouterOutlet;
     @HostBinding('class') classes = '';
+    @Input() placeholderText = 'core.emptysplit';
     isNested = false;
 
     private subscriptions?: Subscription[];
@@ -65,6 +66,10 @@ export class CoreSplitViewComponent implements AfterViewInit, OnDestroy {
     private updateClasses(): void {
         const classes: string[] = [this.getCurrentMode()];
 
+        if (this.outlet.isActivated) {
+            classes.push('outlet-activated');
+        }
+
         if (this.isNested) {
             classes.push('nested');
         }
@@ -92,4 +97,13 @@ export class CoreSplitViewComponent implements AfterViewInit, OnDestroy {
         return CoreSplitViewMode.MenuAndContent;
     }
 
+    /**
+     * Check if both panels are shown. It depends on screen width.
+     *
+     * @return If split view is enabled.
+     */
+    isOn(): boolean {
+        return this.outlet.isActivated;
+    }
+
 }

src/core/features/block/components/course-blocks/course-blocks.scss

@@ -1,4 +1,6 @@
 :host {
+    --side-blocks-box-shadow: var(--core-menu-box-shadow-start);
+
     &.core-no-blocks .core-course-blocks-content {
         height: auto;
     }
@@ -20,7 +22,7 @@
             div.core-course-blocks-side {
                 max-width: var(--side-blocks-max-width);
                 min-width: var(--side-blocks-min-width);
-                box-shadow: -4px 0px 16px rgba(0, 0, 0, 0.18);
+                box-shadow: var(--side-blocks-box-shadow);
                 z-index: 2;
                 // @todo @include core-split-area-end();
             }
@@ -53,7 +55,7 @@
 :host-context([dir="rtl"]).core-has-blocks {
     @media (min-width: 768px) {
         div.core-course-blocks-side {
-            box-shadow: 4px 0px 16px rgba(0, 0, 0, 0.18);
+            box-shadow: var(--side-blocks-box-shadow);
         }
     }
 }

src/core/services/navigator.ts

@@ -91,6 +91,21 @@ export class CoreNavigatorService {
         return matches?.[1] ?? null;
     }
 
+    /**
+     * Returns if a section is loaded on the split view (tablet mode).
+     *
+     * @param path Path, can be a glob pattern.
+     * @return Whether the active route is using the given path.
+     */
+    isCurrentPathInTablet(path: string): boolean {
+        if (CoreScreen.instance.isMobile) {
+            // Split view is off.
+            return false;
+        }
+
+        return this.isCurrent(path);
+    }
+
     /**
      * Navigate to a new path.
      *
@@ -213,6 +228,8 @@ export class CoreNavigatorService {
      * @return Previous path.
      */
     getPreviousPath(): string {
+        // @todo: Remove this method and the used attributes.
+        // This is a quick workarround to avoid loops. Ie, in messages we can navigate to user profile and there to messages.
         return CoreUrlUtils.instance.removeUrlParams(this.previousPath || '');
     }
 

src/theme/app.scss

@@ -69,6 +69,10 @@ ion-icon {
     }
 }
 
+[dir=rtl] ion-icon.icon-flip-rtl {
+    transform: scaleX(-1);
+}
+
 // Ionic alert.
 ion-alert.core-alert-network-error .alert-head {
     position: relative;

src/theme/variables.scss

@@ -106,6 +106,7 @@
         --color: var(--custom-bottom-tabs-color, var(--white));
     }
 
+    --core-toolbar-button-image-width: var(--custom-toolbar-button-image-width, 32px);
     --ion-statusbar-background: var(--custom-toolbar-background, var(--ion-color-primary));
     ion-toolbar {
         --color: var(--custom-toolbar-color, var(--ion-color-primary-contrast));
@@ -170,8 +171,6 @@
     --selected-item-color: var(--custom-selected-item-color, var(--core-color));
     --selected-item-border-width: var(--custom-selected-item-border-width, 5px);
 
-    --drop-shadow: var(--custom-drop-shadow, 0, 0, 0, 0.2);
-
     --core-login-background: var(--custom-login-background, var(--white));
     --core-login-text-color: var(--custom-login-text-color, var(--black));
 
@@ -188,11 +187,8 @@
     --core-star-color: var(--custom-star-color, var(--core-color));
 
     --core-large-avatar-size:  var(--custom-large-avatar-size, 90px);
-
     --core-avatar-size:  var(--custom-avatar-size, 40px);
 
-    --core-toolbar-button-image-width: var(--custom-toolbar-button-image-width, 32px);
-
     --core-send-message-input-background: var(--custom-send-message-input-background, var(--gray));
     --core-send-message-input-color: var(--custom-send-message-input-color, var(--black));
 
@@ -214,6 +210,11 @@
     --addon-messages-avatar-size: var(--custom-messages-avatar-size, 30px);
     --addon-messages-discussion-badge: var(--custom-messages-discussion-badge, var(--core-color));
     --addon-messages-discussion-badge-text: var(--custom-messages-discussion-badge-text, var(--white));
+
+    --drop-shadow: var(--custom-drop-shadow, 0, 0, 0, 0.2);
+
+    --core-menu-box-shadow-end: var(--custom-menu-box-shadow-end, -4px 0px 16px rgba(0, 0, 0, 0.18));
+    --core-menu-box-shadow-start: var(--custom-menu-box-shadow-start, 4px 0px 16px rgba(0, 0, 0, 0.18));
 }
 
 /*