feat(workspaces): hyprland support

Resolves #18.

The bar will now automatically detect whether running under Sway or Hyprland and use the correct IPC client depending.

src/clients/compositor/mod.rs

@@ -0,0 +1,89 @@
+use color_eyre::{Help, Report, Result};
+use std::fmt::{Display, Formatter};
+use tokio::sync::broadcast;
+use tracing::debug;
+
+pub mod hyprland;
+pub mod sway;
+
+pub enum Compositor {
+    Sway,
+    Hyprland,
+    Unsupported,
+}
+
+impl Display for Compositor {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        write!(
+            f,
+            "{}",
+            match self {
+                Compositor::Sway => "Sway",
+                Compositor::Hyprland => "Hyprland",
+                Compositor::Unsupported => "Unsupported",
+            }
+        )
+    }
+}
+
+impl Compositor {
+    /// Attempts to get the current compositor.
+    /// This is done by checking system env vars.
+    fn get_current() -> Self {
+        if std::env::var("SWAYSOCK").is_ok() {
+            Self::Sway
+        } else if std::env::var("HYPRLAND_INSTANCE_SIGNATURE").is_ok() {
+            Self::Hyprland
+        } else {
+            Self::Unsupported
+        }
+    }
+
+    /// Gets the workspace client for the current compositor
+    pub fn get_workspace_client() -> Result<&'static (dyn WorkspaceClient + Send)> {
+        let current = Self::get_current();
+        debug!("Getting workspace client for: {current}");
+        match current {
+            Compositor::Sway => Ok(sway::get_sub_client()),
+            Compositor::Hyprland => Ok(hyprland::get_client()),
+            Compositor::Unsupported => Err(Report::msg("Unsupported compositor")
+                .note("Currently workspaces are only supported by Sway and Hyprland")),
+        }
+    }
+}
+
+#[derive(Debug, Clone)]
+pub struct Workspace {
+    /// Unique identifier
+    pub id: String,
+    /// Workspace friendly name
+    pub name: String,
+    /// Name of the monitor (output) the workspace is located on
+    pub monitor: String,
+    /// Whether the workspace is in focus
+    pub focused: bool,
+}
+
+#[derive(Debug, Clone)]
+pub enum WorkspaceUpdate {
+    /// Provides an initial list of workspaces.
+    /// This is re-sent to all subscribers when a new subscription is created.
+    Init(Vec<Workspace>),
+    Add(Workspace),
+    Remove(Workspace),
+    Update(Workspace),
+    Move(Workspace),
+    /// Declares focus moved from the old workspace to the new.
+    Focus {
+        old: Workspace,
+        new: Workspace,
+    },
+}
+
+pub trait WorkspaceClient {
+    /// Requests the workspace with this name is focused.
+    fn focus(&self, name: String) -> Result<()>;
+
+    /// Creates a new to workspace event receiver.
+    fn subscribe_workspace_change(&self) -> broadcast::Receiver<WorkspaceUpdate>;
+}