ShareDND

Automatic Do Not Disturb while the screen is being shared.

When the first screencast starts (any app sharing via the portal — Discord, OBS, browsers, niri msg action set-dynamic-cast-*, ...), notification DND is enabled. When the last screencast stops, notifications come back.

Plugin

Field	Value
ID	whyoolw/sharednd
Entry	Service: service

Usage

Enable the plugin in Settings → Plugins while running a niri session. The headless service starts monitoring screencasts immediately; it has no bar widget or panel. Start and stop a screen share to verify that Noctalia's DND state follows the session according to the ownership settings below.

How it works

• A headless service follows niri msg -j event-stream and reacts to CastsChanged / CastStartedOrChanged / CastStopped events — no polling.
• On every cast event it re-queries niri msg -j casts as the authoritative state, so missed or reordered events cannot desync it. The stream is wrapped in a shell retry loop and resends full state on reconnect.
• Stop transitions are debounced by ~1 second: switching what is being shared produces a stop/start event pair, which the debounce collapses — DND does not flap, and the stop/start race cannot drop ownership.
• DND is toggled through the host IPC (noctalia msg notification-dnd-set), so the usual OSD feedback appears.

Ownership rules

• If DND was already on before sharing started, the plugin leaves it on after sharing ends (it never took ownership). The "Always disable DND after sharing" setting overrides this.
• If DND was enabled manually during sharing while the plugin owned it, it will still be turned off when sharing ends (the plugin cannot tell the difference).

Settings

• Only active streams — count only casts with is_active: true. Off by default: any open screencast session (even paused or showing nothing) keeps DND on.
• Always disable DND after sharing — force DND off when sharing ends, regardless of its state before sharing started.

Requirements

• Requires niri (detection is niri IPC). Detection only starts inside a niri session (NIRI_SOCKET set and the niri binary in PATH); on other compositors the service is inert and spawns no processes.
• Disabling or reloading the plugin mid-share while it owns DND turns DND back off (onExit cleanup).