Preload tabs in shared media

Fix jumping empty context text in sidebar

src/components/chat/chat.ts

@@ -165,6 +165,9 @@ export default class Chat extends EventListenerBase<{
 
     appSidebarRight.sharedMediaTab.setLoadMutex(this.setPeerPromise);
     appSidebarRight.sharedMediaTab.loadSidebarMedia(true);
+    this.setPeerPromise.then(() => {
+      appSidebarRight.sharedMediaTab.loadSidebarMedia(false);
+    });
 
     return this.setPeerPromise;
   }

src/components/sidebarRight/tabs/sharedMedia.ts

@@ -314,6 +314,7 @@ export default class AppSharedMediaTab implements SliderTab {
       const scrollBarWidth = container.offsetWidth - container.clientWidth;
       container.style.overflowY = 'hidden';
       container.style.paddingRight = `${scrollBarWidth}px`;
+      this.contentContainer.classList.add('sliding');
     }
   };
 
@@ -322,6 +323,7 @@ export default class AppSharedMediaTab implements SliderTab {
     const container = this.scroll.container;
     container.style.overflowY = '';
     container.style.paddingRight = '0';
+    this.contentContainer.classList.remove('sliding');
   };
 
   public filterMessagesByType(ids: number[], type: SharedMediaType) {
@@ -688,7 +690,7 @@ export default class AppSharedMediaTab implements SliderTab {
     
     const peerId = this.peerId;
     
-    let typesToLoad = single ? [this.sharedMediaType] : this.sharedMediaTypes;
+    let typesToLoad = single ? [this.sharedMediaType] : this.sharedMediaTypes.filter(t => t !== this.sharedMediaType);
     typesToLoad = typesToLoad.filter(type => !this.loadedAllMedia[type] 
       || this.usedFromHistory[type] < this.historiesStorage[peerId][type].length);
 
@@ -769,10 +771,13 @@ export default class AppSharedMediaTab implements SliderTab {
           this.loadSidebarMediaPromises[type].then(() => {
             setTimeout(() => {
               this.log('will preload more');
-              this.loadSidebarMedia(true, true).then(() => {
+              const promise = this.loadSidebarMedia(true, true);
-                this.log('preloaded more');
+              if(promise) {
-                this.scroll.checkForTriggers();
+                promise.then(() => {
-              });
+                  this.log('preloaded more');
+                  this.scroll.checkForTriggers();
+                });
+              }
             }, 0);
           });
         }

src/lib/appManagers/appImManager.ts

@@ -400,6 +400,10 @@ export class AppImManager {
       appSidebarRight.sharedMediaTab.setPeer(this.chat.peerId);
       appSidebarRight.sharedMediaTab.loadSidebarMedia(true);
       appSidebarRight.sharedMediaTab.fillProfileElements();
+      
+      setTimeout(() => {
+        appSidebarRight.sharedMediaTab.loadSidebarMedia(false);
+      });
     }
     
     setTimeout(() => {

src/scss/partials/_rightSidebar.scss

@@ -116,6 +116,10 @@
       min-height: calc((var(--vh, 1vh) * 100) - 100% - 60px);
       display: flex;
       flex-direction: column;
+
+      &.sliding {
+        max-height: calc((var(--vh, 1vh) * 100) - 100% - 60px);
+      }
     }
   }