Switch to the new `session` API for screen-sharing (#25802)

src/@types/global.d.ts

@@ -32,7 +32,8 @@ type ElectronChannel =
     | "setBadgeCount"
     | "update-downloaded"
     | "userDownloadCompleted"
-    | "userDownloadAction";
+    | "userDownloadAction"
+    | "openDesktopCapturerSourcePicker";
 
 declare global {
     interface Window {

src/vector/platform/ElectronPlatform.tsx

@@ -43,6 +43,7 @@ import { MatrixEvent } from "matrix-js-sdk/src/models/event";
 import { BreadcrumbsStore } from "matrix-react-sdk/src/stores/BreadcrumbsStore";
 import { UPDATE_EVENT } from "matrix-react-sdk/src/stores/AsyncStore";
 import { avatarUrlForRoom, getInitialLetter } from "matrix-react-sdk/src/Avatar";
+import DesktopCapturerSourcePicker from "matrix-react-sdk/src/components/views/elements/DesktopCapturerSourcePicker";
 
 import VectorBasePlatform from "./VectorBasePlatform";
 import { SeshatIndexManager } from "./SeshatIndexManager";
@@ -163,6 +164,14 @@ export default class ElectronPlatform extends VectorBasePlatform {
             });
         });
 
+        window.electron.on("openDesktopCapturerSourcePicker", () => {
+            const { finished } = Modal.createDialog(DesktopCapturerSourcePicker);
+            finished.then(([source]) => {
+                if (!source) return;
+                this.ipc.call("callDisplayMediaCallback", source);
+            });
+        });
+
         this.ipc.call("startSSOFlow", this.ssoID);
 
         BreadcrumbsStore.instance.on(UPDATE_EVENT, this.onBreadcrumbsUpdate);

test/unit-tests/vector/platform/ElectronPlatform-test.ts

@@ -21,6 +21,9 @@ import { Action } from "matrix-react-sdk/src/dispatcher/actions";
 import dispatcher from "matrix-react-sdk/src/dispatcher/dispatcher";
 import * as rageshake from "matrix-react-sdk/src/rageshake/rageshake";
 import { BreadcrumbsStore } from "matrix-react-sdk/src/stores/BreadcrumbsStore";
+import Modal from "matrix-react-sdk/src/Modal";
+import DesktopCapturerSourcePicker from "matrix-react-sdk/src/components/views/elements/DesktopCapturerSourcePicker";
+import { mocked } from "jest-mock";
 
 import ElectronPlatform from "../../../../src/vector/platform/ElectronPlatform";
 
@@ -76,6 +79,35 @@ describe("ElectronPlatform", () => {
         expect(dispatchFireSpy).toHaveBeenCalledWith(Action.ViewUserSettings);
     });
 
+    it("creates a modal on openDesktopCapturerSourcePicker", async () => {
+        const plat = new ElectronPlatform();
+        Modal.createDialog = jest.fn();
+
+        // @ts-ignore mock
+        mocked(Modal.createDialog).mockReturnValue({
+            finished: new Promise((r) => r(["source"])),
+        });
+
+        let res: () => void;
+        const waitForIPCSend = new Promise<void>((r) => {
+            res = r;
+        });
+        // @ts-ignore mock
+        jest.spyOn(plat.ipc, "call").mockImplementation(() => {
+            res();
+        });
+
+        const [event, handler] = getElectronEventHandlerCall("openDesktopCapturerSourcePicker")!;
+        handler();
+
+        await waitForIPCSend;
+
+        expect(event).toBeTruthy();
+        expect(Modal.createDialog).toHaveBeenCalledWith(DesktopCapturerSourcePicker);
+        // @ts-ignore mock
+        expect(plat.ipc.call).toHaveBeenCalledWith("callDisplayMediaCallback", "source");
+    });
+
     describe("updates", () => {
         it("dispatches on check updates action", () => {
             new ElectronPlatform();