Add spatial audio capabilities

src/settings/SettingsModal.jsx

@@ -24,12 +24,13 @@ import { ReactComponent as DeveloperIcon } from "../icons/Developer.svg";
 import { SelectInput } from "../input/SelectInput";
 import { Item } from "@react-stately/collections";
 import { useMediaHandler } from "./useMediaHandler";
+import { useSpatialAudio, useShowInspector } from "./useSetting";
 import { FieldRow, InputField } from "../input/Input";
 import { Button } from "../button";
 import { useDownloadDebugLog } from "./submit-rageshake";
 import { Body } from "../typography/Typography";
 
-export function SettingsModal({ setShowInspector, showInspector, ...rest }) {
+export const SettingsModal = (props) => {
   const {
     audioInput,
     audioInputs,
@@ -41,6 +42,8 @@ export function SettingsModal({ setShowInspector, showInspector, ...rest }) {
     audioOutputs,
     setAudioOutput,
   } = useMediaHandler();
+  const [spatialAudio, setSpatialAudio] = useSpatialAudio();
+  const [showInspector, setShowInspector] = useShowInspector();
 
   const downloadDebugLog = useDownloadDebugLog();
 
@@ -50,7 +53,7 @@ export function SettingsModal({ setShowInspector, showInspector, ...rest }) {
       isDismissable
       mobileFullScreen
       className={styles.settingsModal}
-      {...rest}
+      {...props}
     >
       <TabContainer className={styles.tabContainer}>
         <TabItem
@@ -81,6 +84,15 @@ export function SettingsModal({ setShowInspector, showInspector, ...rest }) {
               ))}
             </SelectInput>
           )}
+          <FieldRow>
+            <InputField
+              id="spatialAudio"
+              label="Spatial audio (experimental)"
+              type="checkbox"
+              checked={spatialAudio}
+              onChange={(e) => setSpatialAudio(e.target.checked)}
+            />
+          </FieldRow>
         </TabItem>
         <TabItem
           title={
@@ -130,4 +142,4 @@ export function SettingsModal({ setShowInspector, showInspector, ...rest }) {
       </TabContainer>
     </Modal>
   );
-}
+};

src/settings/useSetting.ts

@@ -0,0 +1,56 @@
+/*
+Copyright 2022 New Vector Ltd
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import { EventEmitter } from "events";
+import { useMemo, useState, useEffect, useCallback } from "react";
+
+// Bus to notify other useSetting consumers when a setting is changed
+const settingsBus = new EventEmitter();
+
+// Like useState, but reads from and persists the value to localStorage
+const useSetting = <T>(
+  name: string,
+  defaultValue: T
+): [T, (value: T) => void] => {
+  const key = useMemo(() => `matrix-setting-${name}`, [name]);
+
+  const [value, setValue] = useState<T>(() => {
+    const item = localStorage.getItem(key);
+    return item == null ? defaultValue : JSON.parse(item);
+  });
+
+  useEffect(() => {
+    settingsBus.on(name, setValue);
+    return () => {
+      settingsBus.off(name, setValue);
+    };
+  }, [name, setValue]);
+
+  return [
+    value,
+    useCallback(
+      (newValue: T) => {
+        setValue(newValue);
+        localStorage.setItem(key, JSON.stringify(newValue));
+        settingsBus.emit(name, newValue);
+      },
+      [name, key, setValue]
+    ),
+  ];
+};
+
+export const useSpatialAudio = () => useSetting("spatial-audio", false);
+export const useShowInspector = () => useSetting("show-inspector", false);