Lotus CIandClaude Opus 5.5
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Firefox, Safari and the WebKitGTK desktop app can't hand the user's click to the call frame (no Capability Delegation), and getDisplayMedia needs it. The host used to click EC's hidden footer button through the DOM instead, which dies with same-origin. Now (pins element-call-embedded 0.25.0-lotus.20): - those engines get `lotusFrameScreenshare`, the fork shows EC's own screenshare button in the frame, and the call bar and status bar hide theirs once controls_state reports `frameScreenshare`; the screenshare-audio mute stays; - the room's call policy is pushed with io.lotus.set_frame_screenshare, so the frame button hides where the server would refuse a share, like ours; - Chromium keeps the delegated io.lotus.set_screenshare from the host bar. Removed the fallbacks for forks older than lotus.14, which read or clicked EC's DOM: the screenshare/layout/settings/reactions/leave button lookups and their MutationObservers, the frame-window hotkey binding, and the speaking/muted tile scrape in useCallSpeakers (io.lotus.call_state is the only source now). getCallDocument is gone; the host's only handle on the frame is postMessage. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01PPmy3tPq869XDW4njjVaKA
128 lines
4.1 KiB
TypeScript
128 lines
4.1 KiB
TypeScript
import {
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type Capability,
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EventDirection,
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MatrixCapabilities,
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WidgetEventCapability,
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} from 'matrix-widget-api';
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import { EventType } from 'matrix-js-sdk';
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export function getCallCapabilities(
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roomId: string,
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userId: string,
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deviceId: string,
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): Set<Capability> {
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const capabilities: Set<Capability> = new Set();
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capabilities.add(MatrixCapabilities.Screenshots);
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capabilities.add(MatrixCapabilities.AlwaysOnScreen);
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capabilities.add(MatrixCapabilities.MSC4039UploadFile);
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capabilities.add(MatrixCapabilities.MSC4039DownloadFile);
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capabilities.add(MatrixCapabilities.MSC3846TurnServers);
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capabilities.add(MatrixCapabilities.MSC4157SendDelayedEvent);
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capabilities.add(MatrixCapabilities.MSC4157UpdateDelayedEvent);
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// MSC4515: Element Call >= 0.22 in widget mode discovers its LiveKit
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// transport by asking the host (it no longer reads .well-known itself), so
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// without this capability every call fails with MISSING_MATRIX_RTC_TRANSPORT.
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capabilities.add(MatrixCapabilities.MSC4515RtcTransports);
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capabilities.add(`org.matrix.msc2762.timeline:${roomId}`);
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capabilities.add(`org.matrix.msc2762.state:${roomId}`);
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capabilities.add(
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WidgetEventCapability.forStateEvent(EventDirection.Receive, EventType.RoomMember).raw,
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);
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capabilities.add(
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WidgetEventCapability.forStateEvent(EventDirection.Receive, 'org.matrix.msc3401.call').raw,
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);
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capabilities.add(
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WidgetEventCapability.forStateEvent(EventDirection.Receive, EventType.RoomEncryption).raw,
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);
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capabilities.add(
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WidgetEventCapability.forStateEvent(EventDirection.Receive, EventType.RoomName).raw,
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);
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capabilities.add(
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WidgetEventCapability.forStateEvent(
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EventDirection.Send,
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'org.matrix.msc3401.call.member',
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userId,
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).raw,
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);
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capabilities.add(
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WidgetEventCapability.forStateEvent(
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EventDirection.Send,
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'org.matrix.msc3401.call.member',
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`_${userId}_${deviceId}_m.call`,
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).raw,
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);
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capabilities.add(
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WidgetEventCapability.forStateEvent(
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EventDirection.Send,
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'org.matrix.msc3401.call.member',
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`${userId}_${deviceId}_m.call`,
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).raw,
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);
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capabilities.add(
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WidgetEventCapability.forStateEvent(
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EventDirection.Send,
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'org.matrix.msc3401.call.member',
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`_${userId}_${deviceId}`,
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).raw,
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);
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capabilities.add(
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WidgetEventCapability.forStateEvent(
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EventDirection.Send,
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'org.matrix.msc3401.call.member',
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`${userId}_${deviceId}`,
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).raw,
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);
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capabilities.add(
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WidgetEventCapability.forStateEvent(EventDirection.Receive, 'org.matrix.msc3401.call.member')
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.raw,
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);
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capabilities.add(
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WidgetEventCapability.forStateEvent(EventDirection.Receive, EventType.RoomCreate).raw,
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);
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[
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'io.element.call.encryption_keys',
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'org.matrix.rageshake_request',
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EventType.Reaction,
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EventType.RoomRedaction,
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'io.element.call.reaction',
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'org.matrix.msc4075.rtc.notification',
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'org.matrix.msc4310.rtc.decline',
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].forEach((type) => {
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capabilities.add(WidgetEventCapability.forRoomEvent(EventDirection.Send, type).raw);
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capabilities.add(WidgetEventCapability.forRoomEvent(EventDirection.Receive, type).raw);
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});
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[
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EventType.CallInvite,
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EventType.CallCandidates,
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EventType.CallAnswer,
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EventType.CallHangup,
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EventType.CallReject,
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EventType.CallSelectAnswer,
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EventType.CallNegotiate,
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EventType.CallSDPStreamMetadataChanged,
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EventType.CallSDPStreamMetadataChangedPrefix,
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EventType.CallReplaces,
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EventType.CallEncryptionKeysPrefix,
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].forEach((type) => {
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capabilities.add(WidgetEventCapability.forToDeviceEvent(EventDirection.Send, type).raw);
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capabilities.add(WidgetEventCapability.forToDeviceEvent(EventDirection.Receive, type).raw);
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});
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return capabilities;
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}
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/**
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* Capability Delegation (`postMessage(msg, { delegate })`) ships only in
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* Chromium; other engines silently ignore the option, so the frame would get
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* no activation. `navigator.userAgentData` is likewise Chromium-only, which
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* makes it the practical feature test.
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*/
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export const canDelegateCapability = (): boolean =>
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typeof navigator !== 'undefined' && 'userAgentData' in navigator;
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