Refer workspace by id

niri-ipc/src/lib.rs

@@ -1727,7 +1727,15 @@ impl FromStr for WorkspaceReferenceArg {
                 return Err("workspace index must be between 0 and 255");
             }
         } else {
-            Self::Name(s.to_string())
+            if let Some(target_id) = s.strip_prefix("id:") {
+                if let Ok(wid) = target_id.parse::<u64>() {
+                    Self::Id(wid)
+                } else {
+                    return Err("workspace id must be integer");
+                }
+            } else {
+                Self::Name(s.to_string())
+            }
         };
 
         Ok(reference)

src/ipc/client.rs

@@ -379,12 +379,13 @@ pub fn handle_msg(mut msg: Msg, json: bool) -> anyhow::Result<()> {
 
                 let is_active = if ws.is_active { " * " } else { "   " };
                 let idx = ws.idx;
+                let wid = ws.id;
                 let name = if let Some(name) = ws.name.as_deref() {
                     format!(" \"{name}\"")
                 } else {
                     String::new()
                 };
-                println!("{is_active}{idx}{name}");
+                println!("{is_active}{idx}\t{wid}\t{name}");
             }
         }
         Msg::KeyboardLayouts => {