current window title

modules/WindowTitle.qml

@@ -1,12 +1,59 @@
 import QtQuick
+import Quickshell.Io
 import "." as M
 
-// Niri window title disabled — Quickshell.Services.Niri not available
-Text {
-    text: ""
+M.BarLabel {
+    id: root
+
+    label: root._title
     color: M.Theme.base05
-    font.pixelSize: M.Theme.fontSize
-    font.family: M.Theme.fontFamily
+    tooltip: root._appId ? root._appId + "\n" + root._title : root._title
     elide: Text.ElideRight
-    verticalAlignment: Text.AlignVCenter
+
+    property string _title: ""
+    property string _appId: ""
+
+    // Initial state — niri event-stream doesn't replay current focus
+    Process {
+        id: initProc
+        running: true
+        command: ["niri", "msg", "--json", "focused-window"]
+        stdout: StdioCollector {
+            onStreamFinished: {
+                try {
+                    const w = JSON.parse(text);
+                    if (w) {
+                        root._title = w.title || "";
+                        root._appId = w.app_id || "";
+                    }
+                } catch (e) {}
+            }
+        }
+    }
+
+    // Live updates via event stream
+    Process {
+        id: eventStream
+        running: true
+        command: ["niri", "msg", "--json", "event-stream"]
+        stdout: SplitParser {
+            splitMarker: "\n"
+            onRead: line => {
+                try {
+                    const ev = JSON.parse(line);
+                    if (ev.WindowFocusChanged !== undefined) {
+                        const w = ev.WindowFocusChanged.window;
+                        root._title = w ? (w.title || "") : "";
+                        root._appId = w ? (w.app_id || "") : "";
+                    } else if (ev.WindowOpenedOrChanged !== undefined) {
+                        const w = ev.WindowOpenedOrChanged.window;
+                        if (w.is_focused) {
+                            root._title = w.title || "";
+                            root._appId = w.app_id || "";
+                        }
+                    }
+                } catch (e) {}
+            }
+        }
+    }
 }