Promote speakers to the first page of the grid

src/room/InCallView.tsx

@@ -216,6 +216,7 @@ export function InCallView({
           focused: screenshareFeeds.length === 0 && callFeed === activeSpeaker,
           isLocal: member.userId === localUserId && deviceId === localDeviceId,
           presenter,
+          isSpeaker: callFeed === activeSpeaker,
           largeBaseSize: false,
           connectionState,
         });
@@ -244,6 +245,7 @@ export function InCallView({
           focused: true,
           isLocal: screenshareFeed.isLocal(),
           presenter: false,
+          isSpeaker: screenshareFeed === activeSpeaker,
           largeBaseSize: true,
           placeNear: `${member.userId} ${deviceId}`,
           connectionState,

src/video-grid/NewVideoGrid.tsx

@@ -46,6 +46,7 @@ import {
   addItems,
   tryMoveTile,
   resize,
+  promoteSpeakers,
 } from "./model";
 import { TileWrapper } from "./TileWrapper";
 
@@ -96,6 +97,9 @@ const useGridState = (
       const newItems = items.filter((i) => !existingItemIds.has(i.id));
       const grid3 = addItems(newItems, grid2);
 
+      // Step 4: Promote speakers to the top
+      promoteSpeakers(grid3);
+
       return { ...grid3, generation: prevGrid.generation + 1 };
     },
     [columns, items]

src/video-grid/TileDescriptor.tsx

@@ -26,6 +26,7 @@ export interface TileDescriptor {
   member: RoomMember;
   focused: boolean;
   presenter: boolean;
+  isSpeaker: boolean;
   callFeed?: CallFeed;
   isLocal?: boolean;
   largeBaseSize: boolean;

src/video-grid/model.ts

@@ -668,3 +668,31 @@ export function resize(g: Grid, columns: number): Grid {
 
   return fillGaps(result);
 }
+
+/**
+ * Promotes speakers to the first page of the grid.
+ */
+export function promoteSpeakers(g: Grid) {
+  // This is all a bit of a hack right now, because we don't know if the designs
+  // will stick with this approach in the long run
+  // We assume that 4 rows are probably about 1 page
+  const firstPageEnd = g.columns * 4;
+
+  for (let from = firstPageEnd; from < g.cells.length; from++) {
+    const fromCell = g.cells[from];
+    // Don't bother trying to promote enlarged tiles
+    if (
+      fromCell?.item.isSpeaker &&
+      fromCell.columns === 1 &&
+      fromCell.rows === 1
+    ) {
+      // Promote this tile by making 10 attempts to place it on the first page
+      for (let j = 0; j < 10; j++) {
+        const to = Math.floor(Math.random() * firstPageEnd);
+        const toCell = g.cells[to];
+        if (toCell === undefined || (toCell.columns === 1 && toCell.rows === 1))
+          moveTile(g, from, to);
+      }
+    }
+  }
+}