386 lines
15 KiB
Rust
386 lines
15 KiB
Rust
use crate::socket::{create_niri_socket, query, tell};
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use anyhow::{Context, Result, anyhow};
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use niri_ipc::{
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Action, Event, Reply, Request, Response, Window, Workspace, WorkspaceReferenceArg,
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state::{EventStreamState, EventStreamStatePart},
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};
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use niri_tag::{TagCmd, TagEvent, TagState};
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use smol::{
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channel::{self, Sender},
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future,
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io::BufReader,
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net::unix::UnixStream,
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};
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use std::collections::HashMap;
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pub struct NiriTag {
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tags: HashMap<u8, bool>,
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windows: HashMap<u64, u8>,
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state: EventStreamState,
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socket: BufReader<UnixStream>,
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ev_tx: channel::Sender<TagEvent>,
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}
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enum TagAction {
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ChangeWindow(u64),
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ChangeTag(u8),
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}
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impl NiriTag {
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pub async fn new(ev_tx: channel::Sender<TagEvent>) -> Result<Self> {
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Ok(Self {
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tags: HashMap::new(),
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windows: HashMap::new(),
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state: EventStreamState::default(),
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socket: create_niri_socket().await?,
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ev_tx,
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})
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}
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async fn do_action(&mut self, action: TagAction) -> Result<()> {
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use TagAction::*;
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let same_output =
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|wsid: u64, candidates: &HashMap<&u64, &Workspace>| -> Result<Workspace> {
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candidates
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.values()
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.filter_map(|ws| {
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let output = ws.output.clone()?;
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let win_output = self
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.state
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.workspaces
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.workspaces
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.get(&wsid)?
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.output
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.clone()?;
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(win_output == output).then_some(ws)
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})
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.last()
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.context(anyhow!(
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"No inactive workspaces on output of workspace {} found",
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wsid
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))
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.copied()
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.cloned()
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};
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let (active, inactive): (HashMap<_, _>, HashMap<_, _>) = self
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.state
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.workspaces
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.workspaces
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.iter()
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.partition(|(_, ws)| ws.is_active);
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match action {
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ChangeWindow(wid) => {
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let current_tag = *self.windows.entry(wid).or_insert(0);
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let tag_visible = *self.tags.entry(current_tag).or_insert(true);
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let win = self
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.state
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.windows
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.windows
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.get(&wid)
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.ok_or(anyhow!("Failed to retrieve window {} from niri state", wid))?;
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let wsid: u64 = win
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.workspace_id
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.ok_or(anyhow!("Retrieving workspace id of a changed window"))?;
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let win_visible = active.contains_key(&wsid);
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match (win_visible, tag_visible) {
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(true, false) => {
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let inactive_same_output = same_output(wsid, &inactive)?;
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tell(
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&mut self.socket,
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Request::Action(Action::MoveWindowToWorkspace {
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window_id: Some(wid),
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reference: WorkspaceReferenceArg::Id(inactive_same_output.id),
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focus: false,
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}),
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)
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.await
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}
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(false, true) => {
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let active_same_output = same_output(wsid, &active)?;
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tell(
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&mut self.socket,
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Request::Action(Action::MoveWindowToWorkspace {
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window_id: Some(wid),
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reference: WorkspaceReferenceArg::Id(active_same_output.id),
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focus: true,
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}),
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)
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.await
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}
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_ => Ok(()),
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}
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}
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ChangeTag(tag) => {
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tracing::debug!("Changing tag {}", tag);
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let tag_visible = *self.tags.entry(tag).or_insert(true);
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tracing::debug!("Windows: {:?}", self.windows);
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let affected_windows: Vec<u64> = self
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.windows
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.iter()
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.filter(|(_, t)| tag == **t)
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.map(|(wid, _)| *wid)
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.collect();
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tracing::debug!(
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"{} affected windows of tag {}: {:?}",
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affected_windows.len(),
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tag,
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affected_windows
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);
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let focus = affected_windows.last().cloned();
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for wid in affected_windows {
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tracing::debug!("Changing affected window {}", wid);
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if let Some(win) = self.state.windows.windows.get(&wid) {
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let wsid = win.workspace_id.unwrap();
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match same_output(wsid, if tag_visible { &active } else { &inactive }) {
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Ok(status_same_output) => {
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if let Err(e) = tell(
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&mut self.socket,
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Request::Action(Action::MoveWindowToWorkspace {
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window_id: Some(wid),
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reference: WorkspaceReferenceArg::Id(status_same_output.id),
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focus: false,
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}),
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)
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.await
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{
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tracing::error!(
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"Failed to move window {} to workspace {}: {}",
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wid,
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status_same_output.id,
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e
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);
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}
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}
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Err(e) => tracing::error!(
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"Failed to get workspace on same output as {}: {}",
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wsid,
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e
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),
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}
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} else {
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tracing::warn!("Failed to get wid {} from niri state", wid);
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continue;
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}
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}
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if let Some(focus) = focus {
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if tag_visible {
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tell(
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&mut self.socket,
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Request::Action(Action::FocusWindow { id: focus }),
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)
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.await?;
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}
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}
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Ok(())
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}
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}
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}
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async fn get_focused_window(&mut self) -> Result<Window> {
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let q = query(&mut self.socket, Request::FocusedWindow).await?;
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if let Reply::Ok(Response::FocusedWindow(win)) = q {
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if let Some(win) = win {
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Ok(win)
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} else {
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Err(anyhow!("No focused window to operate on"))
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}
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} else {
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Err(anyhow!(
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"Invalid response from Niri when requesting FocusedWindow: {}",
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if q.is_err() {
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q.unwrap_err()
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} else {
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serde_json::to_string(&q.unwrap())?
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}
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))
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}
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}
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async fn handle_recvd(&mut self, recvd: Receivable) -> Result<()> {
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use TagAction::*;
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let send_event = async |tx: Sender<TagEvent>, ev| {
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smol::spawn(async move {
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tx.send(ev)
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.await
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.inspect_err(|e| tracing::error!("Failed to send event: {}", e))
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})
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.detach();
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};
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let add_tag = async |tx: Sender<TagEvent>, windows: &HashMap<u64, u8>, t| {
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if windows
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.iter()
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.filter(|(_, tag)| **tag == t)
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.collect::<HashMap<_, _>>()
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.is_empty()
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{
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send_event(tx, TagEvent::TagOccupied(t)).await;
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}
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};
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let rm_tag = async |tx: Sender<TagEvent>, windows: &HashMap<u64, u8>, wid, old_tag| {
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if old_tag != 0
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&& windows
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.iter()
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.filter(|(w, tag)| **tag == old_tag && **w != wid)
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.collect::<Vec<(_, _)>>()
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.is_empty()
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{
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send_event(tx, TagEvent::TagEmpty(old_tag)).await;
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}
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};
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// first do any local mutations
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let action: TagAction = match recvd {
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Receivable::Event(ev) => {
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let _ = self.state.apply(ev.clone());
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return self.handle_event(ev).await;
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}
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Receivable::FullState(tx) => {
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tracing::debug!("received request for full state");
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let fullstate: HashMap<u8, TagState> = self
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.tags
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.iter()
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.map(|(&t, &enabled)| {
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(
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t,
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TagState {
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enabled,
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occupied: self.windows.values().filter(|w_t| **w_t == t).count()
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> 0,
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urgent: false, // urgency is TODO
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},
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)
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})
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.collect();
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return tx.send(fullstate).await.map_err(|e| anyhow!(e));
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}
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Receivable::TagCmd(cmd) => match cmd {
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TagCmd::AddTagToWin(t) => {
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let win = self.get_focused_window().await?;
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let wid = win.id;
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self.windows.insert(wid, t);
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tracing::debug!("adding tag {} to {}", t, wid);
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let tx = self.ev_tx.clone();
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add_tag(tx, &self.windows, t).await;
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ChangeWindow(wid)
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}
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TagCmd::RemoveTagFromWin(_) => {
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let win = self.get_focused_window().await?;
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let wid = win.id;
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let old_tag = self.windows.insert(wid, 0).unwrap_or(0);
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tracing::debug!("resetting tag on {}", wid);
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let tx = self.ev_tx.clone();
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rm_tag(tx, &self.windows, wid, old_tag).await;
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ChangeWindow(wid)
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}
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TagCmd::ToggleTagOnWin(t) => {
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let win = self.get_focused_window().await?;
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let wid = win.id;
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tracing::debug!("{} has tag {:?}", wid, self.windows.get(&wid));
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let this_tag = *self.windows.entry(wid).or_insert(0);
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let toggle = if this_tag == t { 0 } else { t };
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let tx = self.ev_tx.clone();
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if toggle == 0 {
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rm_tag(tx, &self.windows, wid, this_tag).await;
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} else {
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add_tag(tx, &self.windows, t).await;
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}
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tracing::debug!("toggling {} to tag {}", wid, toggle);
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self.windows.insert(wid, toggle);
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ChangeWindow(wid)
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}
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TagCmd::EnableTag(t) => {
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self.tags.insert(t, true);
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send_event(self.ev_tx.clone(), TagEvent::TagEnabled(t)).await;
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ChangeTag(t)
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}
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TagCmd::DisableTag(t) => {
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self.tags.insert(t, false);
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send_event(self.ev_tx.clone(), TagEvent::TagDisabled(t)).await;
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ChangeTag(t)
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}
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TagCmd::ToggleTag(t) => {
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let visible = *self.tags.entry(t).or_insert(false);
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if visible {
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send_event(self.ev_tx.clone(), TagEvent::TagEnabled(t)).await;
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} else {
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send_event(self.ev_tx.clone(), TagEvent::TagDisabled(t)).await;
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}
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tracing::debug!("toggling tag {} to {}", t, !visible);
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self.tags.insert(t, !visible);
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ChangeTag(t)
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}
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},
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};
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// then arrange corresponding state in the compositor
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self.do_action(action).await
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}
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async fn handle_event(&mut self, ev: Event) -> Result<()> {
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use Event::*;
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match ev {
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WindowOpenedOrChanged { window } => {
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self.windows.entry(window.id).or_insert(0);
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Ok(())
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}
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WindowClosed { id } => {
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self.windows.remove(&id);
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Ok(())
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}
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// WorkspaceActivated { .. } => (),
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// WorkspacesChanged { .. } => (),
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// WorkspaceUrgencyChanged { .. } => (),
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WindowsChanged { windows } => {
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for w in windows {
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self.windows.entry(w.id).or_insert(0);
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let action = self.do_action(TagAction::ChangeWindow(w.id)).await;
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if let Err(e) = action {
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tracing::warn!("Failed to ChangeWindow on {}: {}", w.id, e);
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}
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}
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Ok(())
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}
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// WindowUrgencyChanged { .. } => (),
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_ => Ok(()),
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}
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}
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#[allow(unreachable_code)]
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pub async fn manage_tags(
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mut self,
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ev_rx: channel::Receiver<Event>,
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tag_rx: channel::Receiver<TagCmd>,
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fullstate_rx: channel::Receiver<channel::Sender<HashMap<u8, TagState>>>,
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) -> Result<()> {
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// base tag is always visible
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self.tags.insert(0, true);
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loop {
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let recvd: Receivable = future::or(
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async { ev_rx.recv().await.map(Receivable::Event) },
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future::or(
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async { tag_rx.recv().await.map(Receivable::TagCmd) },
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async { fullstate_rx.recv().await.map(Receivable::FullState) },
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),
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)
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.await?;
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tracing::debug!("manager received {:?}", recvd);
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let res = self.handle_recvd(recvd).await;
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match res {
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Ok(()) => (),
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Err(e) => tracing::error!("error occurred in manager loop: {}", e),
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}
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}
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tracing::error!("Manager loop ended");
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unreachable!("Manager loop ended");
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}
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}
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#[derive(Debug)]
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enum Receivable {
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Event(Event),
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TagCmd(TagCmd),
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FullState(channel::Sender<HashMap<u8, TagState>>),
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}
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