snapshot of https://github.com/jitsi/jitsi-meet.git @ fd1749dd28f4138aa80234fc7f311b19aaffa0e7 (2026-09-15)

react/features/large-video/reducer.ts

@@ -0,0 +1,64 @@
+import { PARTICIPANT_ID_CHANGED } from '../base/participants/actionTypes';
+import ReducerRegistry from '../base/redux/ReducerRegistry';
+
+import {
+    SELECT_LARGE_VIDEO_PARTICIPANT,
+    SET_LARGE_VIDEO_DIMENSIONS,
+    SET_SEE_WHAT_IS_BEING_SHARED,
+    UPDATE_KNOWN_LARGE_VIDEO_RESOLUTION
+} from './actionTypes';
+
+export interface ILargeVideoState {
+    height?: number;
+    participantId?: string;
+    resolution?: number;
+    seeWhatIsBeingShared?: boolean;
+    width?: number;
+}
+
+ReducerRegistry.register<ILargeVideoState>('features/large-video', (state = {}, action): ILargeVideoState => {
+    switch (action.type) {
+
+    // When conference is joined, we update ID of local participant from default
+    // 'local' to real ID. However, in large video we might have already
+    // selected 'local' as participant on stage. So in this case we must update
+    // ID of participant on stage to match ID in 'participants' state to avoid
+    // additional changes in state and (re)renders.
+    case PARTICIPANT_ID_CHANGED:
+        if (state.participantId === action.oldValue) {
+            return {
+                ...state,
+                participantId: action.newValue
+            };
+        }
+        break;
+
+    case SELECT_LARGE_VIDEO_PARTICIPANT:
+        return {
+            ...state,
+            participantId: action.participantId
+        };
+
+    case SET_LARGE_VIDEO_DIMENSIONS:
+        return {
+            ...state,
+            height: action.height,
+            width: action.width
+        };
+
+    case UPDATE_KNOWN_LARGE_VIDEO_RESOLUTION:
+        return {
+            ...state,
+            resolution: action.resolution
+        };
+
+    case SET_SEE_WHAT_IS_BEING_SHARED:
+        return {
+            ...state,
+            seeWhatIsBeingShared: action.seeWhatIsBeingShared
+        };
+
+    }
+
+    return state;
+});