fix(web): fix lost scrollpos on deep link to timeline asset, scrub stop (#16305)

* Work in progress - super quick asset store->state

* bugfix: deep linking to timeline, on scrub stop

* format, remove stale

* disable test, todo: fix test

* remove unused import

* Fix merge

* lint

* lint

* lint

* Default to non-wasm layout

* lint

* intobs fix

* fix rejected promise

* Review comments, static import wasm

* Back to dynamic

* try top-level-await

* back to the first solution, with more finesse

* comment out wasm for now

* back out the wasm/thumbhash/thumbnail changes

* lint

* Fully remove wasm

* lockfile

---------

Co-authored-by: Alex Tran <alex.tran1502@gmail.com>

web/src/lib/utils/layout-utils.ts

@@ -0,0 +1,106 @@
+import { getAssetRatio } from '$lib/utils/asset-utils';
+// import { TUNABLES } from '$lib/utils/tunables';
+// note: it's important that this is not imported in more than one file due to https://github.com/sveltejs/kit/issues/7805
+// import { JustifiedLayout, type LayoutOptions } from '@immich/justified-layout-wasm';
+import type { AssetResponseDto } from '@immich/sdk';
+import createJustifiedLayout from 'justified-layout';
+
+export type getJustifiedLayoutFromAssetsFunction = typeof getJustifiedLayoutFromAssets;
+
+// let useWasm = TUNABLES.LAYOUT.WASM;
+
+export type CommonJustifiedLayout = {
+  containerWidth: number;
+  containerHeight: number;
+  getTop(boxIdx: number): number;
+  getLeft(boxIdx: number): number;
+  getWidth(boxIdx: number): number;
+  getHeight(boxIdx: number): number;
+};
+
+export type CommonLayoutOptions = {
+  rowHeight: number;
+  rowWidth: number;
+  spacing: number;
+  heightTolerance: number;
+};
+
+export function getJustifiedLayoutFromAssets(
+  assets: AssetResponseDto[],
+  options: CommonLayoutOptions,
+): CommonJustifiedLayout {
+  // if (useWasm) {
+  //   return wasmJustifiedLayout(assets, options);
+  // }
+  return justifiedLayout(assets, options);
+}
+
+// commented out until a solution for top level awaits on safari is fixed
+// function wasmJustifiedLayout(assets: AssetResponseDto[], options: LayoutOptions) {
+//   const aspectRatios = new Float32Array(assets.length);
+//   // eslint-disable-next-line unicorn/no-for-loop
+//   for (let i = 0; i < assets.length; i++) {
+//     const { width, height } = getAssetRatio(assets[i]);
+//     aspectRatios[i] = width / height;
+//   }
+//   return new JustifiedLayout(aspectRatios, options);
+// }
+
+type Geometry = ReturnType<typeof createJustifiedLayout>;
+class Adapter {
+  result;
+  constructor(result: Geometry) {
+    this.result = result;
+  }
+
+  get containerWidth() {
+    let width = 0;
+    for (const box of this.result.boxes) {
+      if (box.top < 100) {
+        width = box.left + box.width;
+      }
+    }
+    return width;
+  }
+
+  get containerHeight() {
+    return this.result.containerHeight;
+  }
+
+  getTop(boxIdx: number) {
+    return this.result.boxes[boxIdx]?.top;
+  }
+
+  getLeft(boxIdx: number) {
+    return this.result.boxes[boxIdx]?.left;
+  }
+
+  getWidth(boxIdx: number) {
+    return this.result.boxes[boxIdx]?.width;
+  }
+
+  getHeight(boxIdx: number) {
+    return this.result.boxes[boxIdx]?.height;
+  }
+}
+
+export const emptyGeometry = new Adapter({
+  containerHeight: 0,
+  widowCount: 0,
+  boxes: [],
+});
+
+export function justifiedLayout(assets: AssetResponseDto[], options: CommonLayoutOptions) {
+  const adapter = {
+    targetRowHeight: options.rowHeight,
+    containerWidth: options.rowWidth,
+    boxSpacing: options.spacing,
+    targetRowHeightTolerange: options.heightTolerance,
+  };
+
+  const result = createJustifiedLayout(
+    assets.map((g) => getAssetRatio(g)),
+    adapter,
+  );
+  return new Adapter(result);
+}