Prevent layout recalculations in some animations

stylesheets/_modules.scss

@@ -3924,8 +3924,8 @@ button.module-image__border-overlay:focus {
     line-height: 0;
     overflow: hidden;
     border-radius: 5px;
-    transition: top 200ms linear, left 200ms linear, width 200ms linear,
-      height 200ms linear;
+    transform: translate(0, 0);
+    transition: transform 200ms linear, width 200ms linear, height 200ms linear;
 
     &__remote-video {
       // The background-color is seen while the video loads.

stylesheets/components/CallingToast.scss

@@ -13,12 +13,13 @@
   position: absolute;
   text-align: center;
   top: 12px;
-  transition: top 200ms ease-out, opacity 200ms ease-out;
+  transform: translateY(0);
+  transition: transform 200ms ease-out, opacity 200ms ease-out;
   user-select: none;
   z-index: $z-index-above-above-base;
 
   &--hidden {
     opacity: 0;
-    top: 5px;
+    transform: translateY(-7px);
   }
 }

stylesheets/components/ConversationHeader.scss

@@ -55,11 +55,12 @@
     width: 24px;
     height: 24px;
     min-width: 24px;
-    margin-left: -24px;
+    margin-left: 12px;
+    transform: translateX(-36px);
     vertical-align: text-bottom;
     border: none;
     opacity: 0;
-    transition: margin-left $transition, opacity $transition;
+    transition: transform $transition, opacity $transition;
 
     &:disabled {
       cursor: default;
@@ -68,7 +69,7 @@
     &--show {
       opacity: 1;
       margin-right: 6px;
-      margin-left: 12px;
+      transform: translateX(0px);
     }
 
     @include light-theme {

stylesheets/components/IncomingCallBar.scss

@@ -5,6 +5,7 @@
   &__container {
     animation: IncomingCallBar--animation 0.2s forwards ease-out;
     position: fixed;
+    top: 22px;
     width: 100%;
     z-index: $z-index-popup;
     padding: {
@@ -185,12 +186,12 @@
 
 @keyframes IncomingCallBar--animation {
   from {
-    top: -100px;
+    transform: translateY(-100px);
     opacity: 0;
   }
 
   to {
-    top: 22px;
+    transform: translateY(0px);
     opacity: 1;
   }
 }

stylesheets/components/InstallScreenQrCodeNotScannedStep.scss

@@ -15,6 +15,7 @@
     flex-direction: row;
     animation: 500ms module-InstallScreenQrCodeNotScannedStep__slide-in;
     position: relative;
+    top: 0;
 
     @include light-theme {
       max-width: $base-max-width;
@@ -113,12 +114,12 @@
 
 @keyframes module-InstallScreenQrCodeNotScannedStep__slide-in {
   from {
-    top: -8px;
+    transform: translateY(-8px);
     opacity: 0;
   }
 
   to {
-    top: 0;
+    transform: translateY(0px);
     opacity: 1;
   }
 }

stylesheets/components/LeftPaneDialog.scss

@@ -238,7 +238,9 @@
       border-radius: 2px;
       display: block;
       height: 100%;
-      transition: width 500ms ease-out;
+      width: 100%;
+      transform: translateX(-100%);
+      transition: transform 500ms ease-out;
     }
   }
 

ts/components/CallingToastManager.tsx

@@ -115,33 +115,33 @@ export function CallingToastManager(props: PropsType): JSX.Element {
     toast = screenSharingToast;
   }
 
-  const [toastMessage, setToastMessage] = useState('');
+  const [isVisible, setIsVisible] = useState(false);
   const timeoutRef = useRef<NodeJS.Timeout | null>(null);
 
   const dismissToast = useCallback(() => {
     if (timeoutRef) {
-      setToastMessage('');
+      setIsVisible(false);
     }
-  }, [setToastMessage, timeoutRef]);
+  }, [setIsVisible, timeoutRef]);
 
   useEffect(() => {
-    if (toast) {
-      if (toast.type === 'dismissable') {
-        clearTimeoutIfNecessary(timeoutRef.current);
-        timeoutRef.current = setTimeout(dismissToast, DEFAULT_LIFETIME);
-      }
+    setIsVisible(toast !== undefined);
+  }, [toast]);
 
-      setToastMessage(toast.message);
+  useEffect(() => {
+    if (toast?.type === 'dismissable') {
+      clearTimeoutIfNecessary(timeoutRef.current);
+      timeoutRef.current = setTimeout(dismissToast, DEFAULT_LIFETIME);
     }
 
     return () => {
       clearTimeoutIfNecessary(timeoutRef.current);
     };
-  }, [dismissToast, setToastMessage, timeoutRef, toast]);
+  }, [dismissToast, setIsVisible, timeoutRef, toast]);
 
   return (
-    <CallingToast isVisible={Boolean(toastMessage)} onClick={dismissToast}>
-      {toastMessage}
+    <CallingToast isVisible={isVisible} onClick={dismissToast}>
+      {toast?.message}
     </CallingToast>
   );
 }

ts/components/DialogUpdate.stories.tsx

@@ -7,6 +7,7 @@ import { action } from '@storybook/addon-actions';
 import { DialogUpdate } from './DialogUpdate';
 import { DialogType } from '../types/Dialogs';
 import { WidthBreakpoint } from './_util';
+import { SECOND } from '../util/durations';
 import { FakeLeftPaneContainer } from '../test-both/helpers/FakeLeftPaneContainer';
 
 import { setupI18n } from '../util/setupI18n';
@@ -110,10 +111,29 @@ FullDownloadReadyWide.story = {
 };
 
 export function DownloadingWide(): JSX.Element {
+  const [downloadedSize, setDownloadedSize] = React.useState(0);
+
+  const { downloadSize } = defaultProps;
+
+  React.useEffect(() => {
+    const interval = setInterval(() => {
+      setDownloadedSize(x => {
+        const newValue = x + 0.25 * downloadSize;
+        if (newValue > downloadSize) {
+          return 0;
+        }
+        return newValue;
+      });
+    }, SECOND);
+
+    return () => clearInterval(interval);
+  }, [downloadSize]);
+
   return (
     <FakeLeftPaneContainer containerWidthBreakpoint={WidthBreakpoint.Wide}>
       <DialogUpdate
         {...defaultProps}
+        downloadedSize={downloadedSize}
         containerWidthBreakpoint={WidthBreakpoint.Wide}
         currentVersion="5.24.0"
         dialogType={DialogType.Downloading}

ts/components/DialogUpdate.tsx

@@ -204,7 +204,7 @@ export function DialogUpdate({
         <div className="LeftPaneDialog__progress--container">
           <div
             className="LeftPaneDialog__progress--bar"
-            style={{ width: `${width}%` }}
+            style={{ transform: `translateX(${width - 100}%)` }}
           />
         </div>
       </LeftPaneDialog>

ts/components/GroupCallRemoteParticipant.tsx

@@ -235,8 +235,7 @@ export const GroupCallRemoteParticipant: React.FC<PropsType> = React.memo(
 
       if ('top' in props) {
         containerStyles.position = 'absolute';
-        containerStyles.top = props.top;
-        containerStyles.left = props.left;
+        containerStyles.transform = `translate(${props.left}px, ${props.top}px)`;
       }
     }