From 964de33b23f29354dfcea08faeb81225f916a5d0 Mon Sep 17 00:00:00 2001
From: Zedhugh Chen <zedhugh@gmail.com>
Date: Thu, 7 May 2026 01:58:00 +0800
Subject: [PATCH] =?UTF-8?q?feat(policy):=20=E5=A4=84=E7=90=86=E7=AA=97?=
 =?UTF-8?q?=E5=8F=A3=E5=85=83=E6=95=B0=E6=8D=AE=E5=8F=98=E6=9B=B4=E4=BA=8B?=
 =?UTF-8?q?=E4=BB=B6?=
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---
 src/core/policy.c | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/src/core/policy.c b/src/core/policy.c
index fbe0290..bab29dc 100644
--- a/src/core/policy.c
+++ b/src/core/policy.c
@@ -140,6 +140,33 @@ static void route_window_remove(
   }
 }
 
+static void route_window_metadata_changed(
+  state_t *state,
+  const window_metadata_change_event_t *e
+) {
+  auto window = state_window_get(state, e->window);
+  if (!window) return;
+
+  auto window_id = e->window;
+  auto metadata  = &e->metadata;
+
+  if (e->changed_fields & ZDWM_WINDOW_METADATA_CHANGE_TITLE) {
+    state_window_set_title(state, window_id, metadata->title);
+  }
+  if (e->changed_fields & ZDWM_WINDOW_METADATA_CHANGE_APP_ID) {
+    state_window_set_app_id(state, window_id, metadata->app_id);
+  }
+  if (e->changed_fields & ZDWM_WINDOW_METADATA_CHANGE_ROLE) {
+    state_window_set_role(state, window_id, metadata->role);
+  }
+  if (e->changed_fields & ZDWM_WINDOW_METADATA_CHANGE_CLASS) {
+    state_window_set_class(state, window_id, metadata->class_name);
+  }
+  if (e->changed_fields & ZDWM_WINDOW_METADATA_CHANGE_INSTANCE) {
+    state_window_set_instance(state, window_id, metadata->instance_name);
+  }
+}
+
 static void route_configure_request(
   state_t *state,
   const configure_data_t *data,
@@ -190,6 +217,9 @@ void policy_route_event(
   case ZDWM_EVENT_WINDOW_REMOVE:
     route_window_remove(state, &event->as.window_remove, out);
     break;
+  case ZDWM_EVENT_WINDOW_METADATA_CHANGED:
+    route_window_metadata_changed(state, &event->as.window_metadata_change);
+    break;
   case ZDWM_EVENT_CONFIGURE_REQUEST: {
     auto data = &event->as.configure_request;
     route_configure_request(state, data, ctx->layouts, out);