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+edition = "2024" + +[dependencies] +anyhow = "1.0.98" +libsystemd = "0.7.2" +serde_json = "1.0.140" +thiserror = "2.0.12" +tracing-subscriber = "0.3.19" +niri-ipc = { path = "niri/niri-ipc" } +smol = "2.0.2" +tracing = "0.1.41" +nix = { version = "0.30.1", features = ["process", "user"] } +serde = { version = "1.0.219", features = ["derive"] } diff --git a/default.nix b/default.nix new file mode 100644 index 0000000..cfb65ec --- /dev/null +++ b/default.nix @@ -0,0 +1,10 @@ +{ + buildRustPackage, + niri, +}: +buildRustPackage (finalAttrs: { + pname = "niri-tag"; + version = (builtins.fromTOML (builtins.readFile ./Cargo.toml)).package.version; + src = ./.; + cargoLock.lockFile = ./Cargo.lock; +}) diff --git a/flake.lock b/flake.lock new file mode 100644 index 0000000..bd00d62 --- /dev/null +++ b/flake.lock @@ -0,0 +1,200 @@ +{ + "nodes": { + "naersk": { + "inputs": { + "nixpkgs": "nixpkgs" + }, + "locked": { + "lastModified": 1745925850, + "narHash": "sha256-cyAAMal0aPrlb1NgzMxZqeN1mAJ2pJseDhm2m6Um8T0=", + "owner": "nix-community", + "repo": "naersk", + "rev": "38bc60bbc157ae266d4a0c96671c6c742ee17a5f", + "type": "github" + }, + "original": { + "owner": "nix-community", + "repo": "naersk", + "type": "github" + } + }, + "niri-flake": { + "inputs": { + "niri-stable": "niri-stable", + "niri-unstable": "niri-unstable", + "nixpkgs": "nixpkgs_2", + "nixpkgs-stable": "nixpkgs-stable", + "xwayland-satellite-stable": "xwayland-satellite-stable", + "xwayland-satellite-unstable": "xwayland-satellite-unstable" + }, + "locked": { + "lastModified": 1749890123, + "narHash": "sha256-pRkyWFytGAMaHlrOJIYYEur8NRDe0kTfMIhRdTeasRQ=", + "owner": "sodiboo", + "repo": "niri-flake", + "rev": "8f39eb82488525728eda222b34e79b1ecf6d3f96", + "type": "github" + }, + "original": { + "owner": "sodiboo", + "repo": "niri-flake", + "type": "github" + } + }, + "niri-stable": { + "flake": false, + "locked": { + "lastModified": 1740117926, + "narHash": "sha256-mTTHA0RAaQcdYe+9A3Jx77cmmyLFHmRoZdd8RpWa+m8=", + "owner": "YaLTeR", + "repo": "niri", + "rev": "b94a5db8790339cf9134873d8b490be69e02ac71", + "type": "github" + }, + "original": { + "owner": "YaLTeR", + "ref": "v25.02", + "repo": "niri", + "type": "github" + } + }, + "niri-unstable": { + "flake": false, + "locked": { + "lastModified": 1749797708, + "narHash": "sha256-P5x0U6AW5Zn20bARv4D83d8XlNaWK1st9QwBfSe+Vfg=", + "owner": "YaLTeR", + "repo": "niri", + "rev": "f3f6e79eeca8924ff9cfea4b30006e5b782bc93e", + "type": "github" + }, + "original": { + "owner": "YaLTeR", + "repo": "niri", + "type": "github" + } + }, + "nixpkgs": { + "locked": { + "lastModified": 1749871736, + "narHash": "sha256-K9yBph93OLTNw02Q6e9CYFGrUhvEXnh45vrZqIRWfvQ=", + "owner": "NixOS", + "repo": "nixpkgs", + "rev": "6afe187897bef7933475e6af374c893f4c84a293", + "type": "github" + }, + "original": { + "owner": "NixOS", + "ref": "nixpkgs-unstable", + "repo": "nixpkgs", + "type": "github" + } + }, + "nixpkgs-stable": { + "locked": { + "lastModified": 1749727998, + "narHash": "sha256-mHv/yeUbmL91/TvV95p+mBVahm9mdQMJoqaTVTALaFw=", + "owner": "NixOS", + "repo": "nixpkgs", + "rev": "fd487183437963a59ba763c0cc4f27e3447dd6dd", + "type": "github" + }, + "original": { + "owner": "NixOS", + "ref": "nixos-25.05", + "repo": "nixpkgs", + "type": "github" + } + }, + "nixpkgs_2": { + "locked": { + "lastModified": 1749794982, + "narHash": "sha256-Kh9K4taXbVuaLC0IL+9HcfvxsSUx8dPB5s5weJcc9pc=", + "owner": "NixOS", + "repo": "nixpkgs", + "rev": "ee930f9755f58096ac6e8ca94a1887e0534e2d81", + "type": "github" + }, + "original": { + "owner": "NixOS", + "ref": "nixos-unstable", + "repo": "nixpkgs", + "type": "github" + } + }, + "nixpkgs_3": { + "locked": { + "lastModified": 1749213349, + "narHash": "sha256-UAaWOyQhdp7nXzsbmLVC67fo+QetzoTm9hsPf9X3yr4=", + "owner": "nixos", + "repo": "nixpkgs", + "rev": "a4ff0e3c64846abea89662bfbacf037ef4b34207", + "type": "github" + }, + "original": { + "owner": "nixos", + "ref": "nixpkgs-unstable", + "repo": "nixpkgs", + "type": "github" + } + }, + "root": { + "inputs": { + "naersk": "naersk", + "niri-flake": "niri-flake", + "nixpkgs": "nixpkgs_3", + "systems": "systems" + } + }, + "systems": { + "locked": { + "lastModified": 1689347949, + "narHash": "sha256-12tWmuL2zgBgZkdoB6qXZsgJEH9LR3oUgpaQq2RbI80=", + "owner": "nix-systems", + "repo": "default-linux", + "rev": "31732fcf5e8fea42e59c2488ad31a0e651500f68", + "type": "github" + }, + "original": { + "owner": "nix-systems", + "repo": "default-linux", + "type": "github" + } + }, + "xwayland-satellite-stable": { + "flake": false, + "locked": { + "lastModified": 1739246919, + "narHash": "sha256-/hBM43/Gd0/tW+egrhlWgOIISeJxEs2uAOIYVpfDKeU=", + "owner": "Supreeeme", + "repo": "xwayland-satellite", + "rev": "44590a416d4a3e8220e19e29e0b6efe64a80315d", + "type": "github" + }, + "original": { + "owner": "Supreeeme", + "ref": "v0.5.1", + "repo": "xwayland-satellite", + "type": "github" + } + }, + "xwayland-satellite-unstable": { + "flake": false, + "locked": { + "lastModified": 1749315541, + "narHash": "sha256-bEik1BfVOFnWvtOrcOHluos/edJ8f+G2y1QySbt/0Ak=", + "owner": "Supreeeme", + "repo": "xwayland-satellite", + "rev": "da2ecb5be816de35e2efe23a408a1c49fe8b11ba", + "type": "github" + }, + "original": { + "owner": "Supreeeme", + "repo": "xwayland-satellite", + "type": "github" + } + } + }, + "root": "root", + "version": 7 +} diff --git a/flake.nix b/flake.nix new file mode 100644 index 0000000..75a73a0 --- /dev/null +++ b/flake.nix @@ -0,0 +1,65 @@ +{ + inputs = { + nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable"; + systems.url = "github:nix-systems/default-linux"; + naersk.url = "github:nix-community/naersk"; + niri-flake.url = "github:sodiboo/niri-flake"; + }; + + outputs = + inputs: + with inputs; + let + getPackages = builtins.attrValues; + forAllSystems = + function: nixpkgs.lib.genAttrs (import systems) (system: function nixpkgs.legacyPackages.${system}); + deps = forAllSystems (pkgs: { + naersk = pkgs.callPackages naersk { }; + build = getPackages { + inherit (pkgs) + cargo + rustc + pkg-config + systemdLibs + ; + }; + dev = getPackages { + inherit (pkgs) + rust-analyzer + rustfmt + clippy + ; + }; + }); + in + { + devShells = forAllSystems (pkgs: { + default = pkgs.mkShell { + packages = with deps.${pkgs.system}; build ++ dev; + RUST_SRC_DIR = "${pkgs.rustPlatform.rustLibSrc}"; + RUST_LOG = "debug"; + shellHook = '' + cp -R ${niri-flake.inputs.niri-unstable} niri/ + ''; + }; + }); + packages = forAllSystems (pkgs: { + unstable = deps.${pkgs.system}.naersk.buildPackage { + src = ./.; + RUSTFLAGS = "--cfg tokio_unstable"; + preConfigure = '' + cp -R ${niri-flake.inputs.niri-unstable} niri/ + ''; + }; + stable = deps.${pkgs.system}.naersk.buildPackage { + src = ./.; + RUSTFLAGS = "--cfg tokio_unstable"; + preBuild = '' + cp -R ${niri-flake.inputs.niri-stable}/niri-ipc . + ''; + }; + default = self.packages.${pkgs.system}.unstable; + }); + # TODO make module that compiles based on niri version + }; +} diff --git a/src/main.rs b/src/main.rs new file mode 100644 index 0000000..2c6147d --- /dev/null +++ b/src/main.rs @@ -0,0 +1,303 @@ +use std::{collections::HashMap, env}; + +use anyhow::{Context, Result, anyhow}; +use niri_ipc::{ + Action, Event, Reply, Request, Response, Window, WorkspaceReferenceArg, + state::{EventStreamState, EventStreamStatePart}, +}; +use nix::unistd::{geteuid, getpid}; +use serde::{Deserialize, Serialize}; +use smol::{ + channel::{self}, + future, + io::{AsyncBufReadExt, AsyncWriteExt, BufReader}, + net::unix::{UnixListener, UnixStream}, +}; + +struct NiriTag { + tags: HashMap, + windows: HashMap, +} + +impl NiriTag { + fn new() -> Self { + Self { + tags: HashMap::new(), + windows: HashMap::new(), + } + } +} + +async fn query(socket: &mut BufReader, req: Request) -> Result { + let req = serde_json::to_string(&req)?; + tracing::debug!("sending request: {}", req); + socket.write_all(&[req.as_bytes(), b"\n"].concat()).await?; + socket.flush().await?; + let mut rep = String::new(); + socket.read_line(&mut rep).await?; + Ok(serde_json::from_str(&rep)?) +} + +async fn tell(socket: &mut BufReader, req: Request) -> Result<()> { + let rep = query(socket, req).await?; + if let Reply::Ok(Response::Handled) = rep { + Ok(()) + } else { + Err(anyhow!( + "Expected Reply::Ok(Response::Handled), got {}", + rep.unwrap_err() + )) + } +} + +async fn create_niri_socket() -> Result> { + let socket_path = env::var(niri_ipc::socket::SOCKET_PATH_ENV) + .context("Couldn't find Niri socket path ($NIRI_SOCKET) in environment")?; + tracing::debug!("socket path is: {}", socket_path); + let raw = UnixStream::connect(&socket_path).await?; + Ok(BufReader::new(raw)) +} + +#[allow(unreachable_code)] +async fn event_listener(tx: channel::Sender) -> Result<()> { + tracing::debug!("creating listener socket"); + let mut socket = create_niri_socket().await?; + tracing::debug!("requesting event stream"); + let mut buf = String::new(); + tell(&mut socket, Request::EventStream).await?; + tracing::debug!("beginning event loop"); + loop { + let _ = socket.read_line(&mut buf).await?; + let event: Event = serde_json::from_str(&buf)?; + tracing::debug!("event: {:?}", event); + tx.send(event).await?; + } + unreachable!("Listener loop ended"); +} + +#[derive(Serialize, Deserialize)] +enum TagCmd { + Add(u8), + Remove(u8), + Enable(u8), + Disable(u8), +} + +enum Receivable { + Event(Event), + TagCmd(TagCmd), +} + +#[allow(unreachable_code)] +async fn manage_tags( + ev_rx: channel::Receiver, + tag_rx: channel::Receiver, +) -> Result<()> { + // notify.recv().await?; + // drop(notify); + let mut state = EventStreamState::default(); + let mut tags = NiriTag::new(); + let mut socket = create_niri_socket().await?; + // base tag is always visible + tags.tags.insert(0, true); + + async fn on_focused_window( + socket: &mut BufReader, + mut ok: O, + mut err: E, + ) -> Result<()> + where + O: FnMut(Option) -> Result<()>, + E: FnMut(Reply) -> Result<()>, + { + let q = query(socket, Request::FocusedWindow).await?; + if let Reply::Ok(Response::FocusedWindow(win)) = q { + ok(win) + } else { + err(q) + } + } + + loop { + let recvd: Receivable = + future::or(async { ev_rx.recv().await.map(Receivable::Event) }, async { + tag_rx.recv().await.map(Receivable::TagCmd) + }) + .await?; + + let res = + match recvd { + Receivable::Event(ev) => { + let _ = state.apply(ev.clone()); + Ok(()) + } + Receivable::TagCmd(cmd) => { + // get wid of current window, add tag to it + match cmd { + TagCmd::Add(t) => on_focused_window( + &mut socket, + |win| { + if let Some(win) = win { + let wid = win.id; + tags.windows.insert(wid, t); + Ok(()) + } else { + Err(anyhow!("No focused window to tag")) + } + }, + |q: Reply| { + Err(anyhow!( + "Invalid response from Niri when requesting FocusedWindow: {}", + if q.is_err() { + q.unwrap_err() + } else { + serde_json::to_string(&q.unwrap())? + } + )) + }, + ) + .await, + TagCmd::Remove(_) => on_focused_window( + &mut socket, + |win| { + if let Some(win) = win { + let wid = win.id; + tags.windows.remove(&wid); + Ok(()) + } else { + Err(anyhow!("No focused window to untag")) + } + }, + |q: Reply| { + Err(anyhow!( + "Invalid response from Niri when requesting FocusedWindow: {}", + if q.is_err() { + q.unwrap_err() + } else { + serde_json::to_string(&q.unwrap())? + } + )) + }, + ) + .await, + TagCmd::Enable(t) => { + tags.tags.insert(t, true); + Ok(()) + } + TagCmd::Disable(t) => { + tags.tags.insert(t, false); + Ok(()) + } + } + } + }; + match res { + Ok(()) => (), + Err(e) => tracing::error!("error occurred in manager loop: {}", e), + } + // use Event::*; + // do we want to catch events or just let them apply and then set things right? + // match ev { + // WorkspaceActivated { .. } => (), + // WorkspacesChanged { .. } => (), + // WorkspaceUrgencyChanged { .. } => (), + // WindowsChanged { .. } => (), + // WindowOpenedOrChanged { .. } => (), + // WindowUrgencyChanged { .. } => (), + // WindowClosed { .. } => (), + // _ => (), + // } + for (&wid, window) in state.windows.windows.iter() { + let (active, inactive): (Vec<_>, Vec<_>) = state + .workspaces + .workspaces + .iter() + .map(|(wsid, ws)| (wsid, ws.is_active)) + .partition(|(_, a)| *a); + if let Some(wsid) = window.workspace_id { + if let Some(&window_tag) = tags.windows.get(&wid) { + if let Some(&tag_enabled) = tags.tags.get(&window_tag) { + if tag_enabled && inactive.contains(&(&wsid, false)) { + tell( + &mut socket, + Request::Action(Action::MoveWindowToWorkspace { + window_id: Some(wid), + reference: WorkspaceReferenceArg::Index(0), + focus: false, + }), + ) + .await?; + tracing::debug!("making visible {}", wid); + } else if !tag_enabled && active.contains(&(&wsid, true)) { + let hidden = *inactive.first().unwrap().0; + tell( + &mut socket, + Request::Action(Action::MoveWindowToWorkspace { + window_id: Some(wid), + reference: WorkspaceReferenceArg::Id(hidden), + focus: false, + }), + ) + .await?; + tracing::debug!("making hidden {}", wid); + } + } else { + tags.windows.insert(wid, 0); + } + } + } + } + } + tracing::error!("Manager loop ended"); + unreachable!("Manager loop ended"); + Ok(()) +} + +#[allow(unreachable_code)] +async fn ipc_listener(tx: channel::Sender) -> Result<()> { + tracing::debug!("creating niri-tag socket"); + let sock_path = format!("/run/user/{}/niri-tag.sock", geteuid()); + if smol::fs::metadata(&sock_path).await.is_ok() { + tracing::debug!("removing old niri-tag socket"); + smol::fs::remove_file(&sock_path).await?; + } + tracing::debug!("establishing niri-tag socket connection"); + let listen = UnixListener::bind(&sock_path) + .inspect_err(|f| tracing::error!("failed to listen to niri-tag socket: {}", f))?; + let mut buf = String::new(); + tracing::debug!( + "this is what a proper tagcmd call looks like: {}", + serde_json::to_string(&TagCmd::Add(1))? + ); + loop { + let (raw_sock, _addr) = listen.accept().await?; + let mut socket = BufReader::new(raw_sock); + tracing::debug!("awaiting ipc socket"); + let _ = socket.read_line(&mut buf).await?; + tracing::debug!("forwarding ipc command"); + tx.send(serde_json::from_str(&buf)?).await?; + socket.close().await?; + } + tracing::error!("IPC loop ended"); + unreachable!("IPC loop ended"); + Ok(()) +} + +fn main() -> Result<()> { + // let systemd know we're ready + let _ = libsystemd::daemon::notify(false, &[libsystemd::daemon::NotifyState::Ready])?; + // debug stuff + tracing_subscriber::fmt() + .with_max_level(tracing::Level::TRACE) + .init(); + let span = tracing::span!(tracing::Level::TRACE, "main"); + let _ = span.enter(); + // spawn socket listener for niri event stream + let (event_tx, event_rx) = smol::channel::unbounded(); + smol::spawn(event_listener(event_tx)).detach(); + // spawn socket listener for ipc + let (ipc_tx, ipc_rx) = smol::channel::unbounded(); + smol::spawn(ipc_listener(ipc_tx)).detach(); + // begin managing niri tags + smol::block_on(manage_tags(event_rx, ipc_rx)) +}