Add hotkeys for apps

niri/focus-or-launch.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+# Focus an existing window by app-id, or launch it if not found.
+# If the target window is already focused, return to the previous window.
+# Usage: focus-or-launch.sh <app-id> <launch-command...>
+APP_ID="$1"
+shift
+
+WINDOWS=$(niri msg -j windows)
+FOCUSED_ID=$(echo "$WINDOWS" | jq -r '.[] | select(.is_focused == true) | .id')
+TARGET_ID=$(echo "$WINDOWS" | jq -r --arg app "$APP_ID" '.[] | select(.app_id == $app) | .id' | head -1)
+
+PREV_FILE="/tmp/niri-focus-prev-${APP_ID}"
+
+if [ "$FOCUSED_ID" = "$TARGET_ID" ]; then
+    if [ -f "$PREV_FILE" ]; then
+        niri msg action focus-window --id "$(cat "$PREV_FILE")" 2>/dev/null || true
+    fi
+else
+    echo "$FOCUSED_ID" > "$PREV_FILE"
+    if [ -n "$TARGET_ID" ]; then
+        niri msg action focus-window --id "$TARGET_ID"
+    else
+        exec "$@"
+    fi
+fi