Use skeleton for review image loading (#10040)

* don't show chips and date when image is loading

* add skeleton and change observer threshold

* remove debug

* use skeleton for live view too

* old activity indicator looks better on live

* fix gradients and lazy load with skeleton

* fading effects

web/package-lock.json

@@ -27,6 +27,7 @@
         "@radix-ui/react-toggle": "^1.0.3",
         "@radix-ui/react-toggle-group": "^1.0.4",
         "@radix-ui/react-tooltip": "^1.0.7",
+        "@types/react-lazy-load-image-component": "^1.6.3",
         "apexcharts": "^3.45.1",
         "axios": "^1.6.2",
         "class-variance-authority": "^0.7.0",
@@ -45,6 +46,7 @@
         "react-dom": "^18.2.0",
         "react-hook-form": "^7.48.2",
         "react-icons": "^4.12.0",
+        "react-lazy-load-image-component": "^1.6.0",
         "react-router-dom": "^6.20.1",
         "react-transition-group": "^4.4.5",
         "react-use-websocket": "^4.5.0",
@@ -2553,14 +2555,12 @@
     "node_modules/@types/prop-types": {
       "version": "15.7.11",
       "resolved": "https://registry.npmjs.org/@types/prop-types/-/prop-types-15.7.11.tgz",
-      "integrity": "sha512-ga8y9v9uyeiLdpKddhxYQkxNDrfvuPrlFb0N1qnZZByvcElJaXthF1UhvCh9TLWJBEHeNtdnbysW7Y6Uq8CVng==",
+      "integrity": "sha512-ga8y9v9uyeiLdpKddhxYQkxNDrfvuPrlFb0N1qnZZByvcElJaXthF1UhvCh9TLWJBEHeNtdnbysW7Y6Uq8CVng=="
-      "devOptional": true
     },
     "node_modules/@types/react": {
       "version": "18.2.41",
       "resolved": "https://registry.npmjs.org/@types/react/-/react-18.2.41.tgz",
       "integrity": "sha512-CwOGr/PiLiNBxEBqpJ7fO3kocP/2SSuC9fpH5K7tusrg4xPSRT/193rzolYwQnTN02We/ATXKnb6GqA5w4fRxw==",
-      "devOptional": true,
       "dependencies": {
         "@types/prop-types": "*",
         "@types/scheduler": "*",
@@ -2586,6 +2586,15 @@
         "react-icons": "*"
       }
     },
+    "node_modules/@types/react-lazy-load-image-component": {
+      "version": "1.6.3",
+      "resolved": "https://registry.npmjs.org/@types/react-lazy-load-image-component/-/react-lazy-load-image-component-1.6.3.tgz",
+      "integrity": "sha512-HsIsYz7yWWTh/bftdzGnijKD26JyofLRqM/RM80sxs7Gk13G83ew8R/ra2XzXuiZfjNEjAq/Va+NBHFF9ciwxA==",
+      "dependencies": {
+        "@types/react": "*",
+        "csstype": "^3.0.2"
+      }
+    },
     "node_modules/@types/react-transition-group": {
       "version": "4.4.10",
       "resolved": "https://registry.npmjs.org/@types/react-transition-group/-/react-transition-group-4.4.10.tgz",
@@ -2598,8 +2607,7 @@
     "node_modules/@types/scheduler": {
       "version": "0.16.8",
       "resolved": "https://registry.npmjs.org/@types/scheduler/-/scheduler-0.16.8.tgz",
-      "integrity": "sha512-WZLiwShhwLRmeV6zH+GkbOFT6Z6VklCItrDioxUnv+u4Ll+8vKeFySoFyK/0ctcRpOmwAicELfmys1sDc/Rw+A==",
+      "integrity": "sha512-WZLiwShhwLRmeV6zH+GkbOFT6Z6VklCItrDioxUnv+u4Ll+8vKeFySoFyK/0ctcRpOmwAicELfmys1sDc/Rw+A=="
-      "devOptional": true
     },
     "node_modules/@types/semver": {
       "version": "7.5.6",
@@ -5606,12 +5614,22 @@
       "integrity": "sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==",
       "dev": true
     },
+    "node_modules/lodash.debounce": {
+      "version": "4.0.8",
+      "resolved": "https://registry.npmjs.org/lodash.debounce/-/lodash.debounce-4.0.8.tgz",
+      "integrity": "sha512-FT1yDzDYEoYWhnSGnpE/4Kj1fLZkDFyqRb7fNt6FdYOSxlUWAtp42Eh6Wb0rGIv/m9Bgo7x4GhQbm5Ys4SG5ow=="
+    },
     "node_modules/lodash.merge": {
       "version": "4.6.2",
       "resolved": "https://registry.npmjs.org/lodash.merge/-/lodash.merge-4.6.2.tgz",
       "integrity": "sha512-0KpjqXRVvrYyCsX1swR/XTK0va6VQkQM6MNo7PqW77ByjAhoARA8EfrP1N4+KlKj8YS0ZUCtRT/YUuhyYDujIQ==",
       "dev": true
     },
+    "node_modules/lodash.throttle": {
+      "version": "4.1.1",
+      "resolved": "https://registry.npmjs.org/lodash.throttle/-/lodash.throttle-4.1.1.tgz",
+      "integrity": "sha512-wIkUCfVKpVsWo3JSZlc+8MB5it+2AN5W8J7YVMST30UrvcQNZ1Okbj+rbVniijTWE6FGYy4XJq/rHkas8qJMLQ=="
+    },
     "node_modules/log-symbols": {
       "version": "4.1.0",
       "resolved": "https://registry.npmjs.org/log-symbols/-/log-symbols-4.1.0.tgz",
@@ -6887,6 +6905,19 @@
       "integrity": "sha512-xWGDIW6x921xtzPkhiULtthJHoJvBbF3q26fzloPCK0hsvxtPVelvftw3zjbHWSkR2km9Z+4uxbDDK/6Zw9B8w==",
       "dev": true
     },
+    "node_modules/react-lazy-load-image-component": {
+      "version": "1.6.0",
+      "resolved": "https://registry.npmjs.org/react-lazy-load-image-component/-/react-lazy-load-image-component-1.6.0.tgz",
+      "integrity": "sha512-8KFkDTgjh+0+PVbH+cx0AgxLGbdTsxWMnxXzU5HEUztqewk9ufQAu8cstjZhyvtMIPsdMcPZfA0WAa7HtjQbBQ==",
+      "dependencies": {
+        "lodash.debounce": "^4.0.8",
+        "lodash.throttle": "^4.1.1"
+      },
+      "peerDependencies": {
+        "react": "^15.x.x || ^16.x.x || ^17.x.x || ^18.x.x",
+        "react-dom": "^15.x.x || ^16.x.x || ^17.x.x || ^18.x.x"
+      }
+    },
     "node_modules/react-remove-scroll": {
       "version": "2.5.5",
       "resolved": "https://registry.npmjs.org/react-remove-scroll/-/react-remove-scroll-2.5.5.tgz",

web/package.json

@@ -32,6 +32,7 @@
     "@radix-ui/react-toggle": "^1.0.3",
     "@radix-ui/react-toggle-group": "^1.0.4",
     "@radix-ui/react-tooltip": "^1.0.7",
+    "@types/react-lazy-load-image-component": "^1.6.3",
     "apexcharts": "^3.45.1",
     "axios": "^1.6.2",
     "class-variance-authority": "^0.7.0",
@@ -50,6 +51,7 @@
     "react-dom": "^18.2.0",
     "react-hook-form": "^7.48.2",
     "react-icons": "^4.12.0",
+    "react-lazy-load-image-component": "^1.6.0",
     "react-router-dom": "^6.20.1",
     "react-transition-group": "^4.4.5",
     "react-use-websocket": "^4.5.0",

web/src/components/player/PreviewThumbnailPlayer.tsx

@@ -7,7 +7,7 @@ import { getIconForLabel, getIconForSubLabel } from "@/utils/iconUtil";
 import TimeAgo from "../dynamic/TimeAgo";
 import useSWR from "swr";
 import { FrigateConfig } from "@/types/frigateConfig";
-import { isMobile, isSafari } from "react-device-detect";
+import { isFirefox, isMobile, isSafari } from "react-device-detect";
 import Chip from "../Chip";
 import {
   ContextMenu,
@@ -19,6 +19,8 @@ import {
 import { LuCheckSquare, LuFileUp, LuTrash } from "react-icons/lu";
 import axios from "axios";
 import { useFormattedTimestamp } from "@/hooks/use-date-utils";
+import { Skeleton } from "../ui/skeleton";
+import { LazyLoadImage } from "react-lazy-load-image-component";
 
 type PreviewPlayerProps = {
   review: ReviewSegment;
@@ -49,6 +51,7 @@ export default function PreviewThumbnailPlayer({
   const [hoverTimeout, setHoverTimeout] = useState<NodeJS.Timeout | null>();
   const [playback, setPlayback] = useState(false);
   const [progress, setProgress] = useState(0);
+  const [imgLoaded, setImgLoaded] = useState(false);
 
   const playingBack = useMemo(() => playback, [playback, autoPlayback]);
 
@@ -110,7 +113,7 @@ export default function PreviewThumbnailPlayer({
           onClick={onClick}
         >
           {playingBack && (
-            <div className="absolute left-0 top-0 right-0 bottom-0">
+            <div className="absolute left-0 top-0 right-0 bottom-0 animate-in fade-in">
               <PreviewContent
                 review={review}
                 relevantPreview={relevantPreview}
@@ -119,17 +122,26 @@ export default function PreviewThumbnailPlayer({
               />
             </div>
           )}
-          <img
+          <LazyLoadImage
             className={`w-full h-full transition-opacity ${
               playingBack ? "opacity-0" : "opacity-100"
             }`}
-            loading="lazy"
             src={`${apiHost}${review.thumb_path.replace(
               "/media/frigate/",
               ""
             )}`}
+            onLoad={() => {
+              setImgLoaded(true);
+            }}
+            placeholder={<Skeleton className="w-full h-full rounded-xl" />}
           />
-          {(review.severity == "alert" || review.severity == "detection") && (
+
+          {!playingBack && imgLoaded && (
+            <>
+              <div className="absolute top-0 left-0 right-0 rounded-t-l z-10 w-full h-[30%] bg-gradient-to-b from-black/60 to-transparent pointer-events-none animate-in fade-in">
+                <div className="flex h-full justify-between items-start mx-3 pb-1 text-white text-sm ">
+                  {(review.severity == "alert" ||
+                    review.severity == "detection") && (
                     <Chip className="absolute top-2 left-2 flex gap-1 bg-gradient-to-br from-gray-400 to-gray-500 bg-gray-500 z-0">
                       {review.data.objects.map((object) => {
                         return getIconForLabel(object, "w-3 h-3 text-white");
@@ -142,14 +154,16 @@ export default function PreviewThumbnailPlayer({
                       })}
                     </Chip>
                   )}
-          {!playingBack && (
+                </div>
-            <div className="absolute left-[6px] right-[6px] bottom-1 flex justify-between text-white">
+              </div>
+              <div className="absolute bottom-0 left-0 right-0 rounded-b-l z-10 w-full h-[20%] bg-gradient-to-t from-black/60 to-transparent pointer-events-none animate-in fade-in">
+                <div className="flex h-full justify-between items-end mx-3 pb-1 text-white text-sm ">
                   <TimeAgo time={review.start_time * 1000} dense />
                   {formattedDate}
                 </div>
+              </div>
+            </>
           )}
-          <div className="absolute top-0 left-0 right-0 rounded-2xl z-10 w-full h-[30%] bg-gradient-to-b from-black/20 to-transparent pointer-events-none" />
-          <div className="absolute bottom-0 left-0 right-0 rounded-2xl z-10 w-full h-[10%] bg-gradient-to-t from-black/20 to-transparent pointer-events-none" />
           {playingBack && (
             <Slider
               className="absolute left-0 right-0 bottom-0 z-10"
@@ -159,8 +173,8 @@ export default function PreviewThumbnailPlayer({
               max={100}
             />
           )}
-          {!playingBack && review.has_been_reviewed && (
+          {!playingBack && imgLoaded && review.has_been_reviewed && (
-            <div className="absolute left-0 top-0 bottom-0 right-0 bg-black bg-opacity-60" />
+            <div className="absolute left-0 top-0 bottom-0 right-0 z-10 bg-black bg-opacity-60" />
           )}
         </div>
       </ContextMenuTrigger>
@@ -192,7 +206,10 @@ function PreviewContent({
     }
 
     // start with a bit of padding
-    return Math.max(0, review.start_time - relevantPreview.start - PREVIEW_PADDING);
+    return Math.max(
+      0,
+      review.start_time - relevantPreview.start - PREVIEW_PADDING
+    );
   }, []);
   const [lastPercent, setLastPercent] = useState(0.0);
 
@@ -203,7 +220,7 @@ function PreviewContent({
       return;
     }
 
-    if (isSafari) {
+    if (isSafari || (isFirefox && isMobile)) {
       playerRef.current.pause();
       setManualPlayback(true);
     } else {
@@ -223,7 +240,8 @@ function PreviewContent({
       (playerRef.current?.currentTime || 0) - playerStartTime;
 
     // end with a bit of padding
-    const playerDuration = review.end_time - review.start_time + PREVIEW_PADDING;
+    const playerDuration =
+      review.end_time - review.start_time + PREVIEW_PADDING;
     const playerPercent = (playerProgress / playerDuration) * 100;
 
     if (
@@ -340,9 +358,8 @@ function InProgressPreview({
 
   if (!previewFrames || previewFrames.length == 0) {
     return (
-      <img
+      <LazyLoadImage
         className="h-full w-full"
-        loading="lazy"
         src={`${apiHost}${review.thumb_path.replace("/media/frigate/", "")}`}
       />
     );

web/src/components/ui/skeleton.tsx

@@ -0,0 +1,15 @@
+import { cn } from "@/lib/utils"
+
+function Skeleton({
+  className,
+  ...props
+}: React.HTMLAttributes<HTMLDivElement>) {
+  return (
+    <div
+      className={cn("animate-pulse rounded-md bg-muted", className)}
+      {...props}
+    />
+  )
+}
+
+export { Skeleton }

web/src/views/events/DesktopEventView.tsx

@@ -133,7 +133,7 @@ export default function DesktopEventView({
           setMinimap([...visibleTimestamps]);
         });
       },
-      { root: contentRef.current, threshold: 0.5 }
+      { root: contentRef.current, threshold: 0.1 }
     );
 
     return () => {