From 0f8c35ae6c64670ff6da886fc4e82abf016fa415 Mon Sep 17 00:00:00 2001
From: Zedhugh Chen <zedhugh@gmail.com>
Date: Tue, 7 Apr 2026 05:47:47 +0800
Subject: [PATCH] =?UTF-8?q?core:=20=E6=B7=BB=E5=8A=A0=E8=BD=AC=E7=A7=BB=20?=
 =?UTF-8?q?window=20metadata=20=E6=95=B0=E6=8D=AE=E7=9A=84=E6=8E=A5?=
 =?UTF-8?q?=E5=8F=A3?=
MIME-Version: 1.0
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Content-Transfer-Encoding: 8bit

---
 src/base/memory.h |  7 +++++++
 src/core/state.c  | 26 ++++++++++++++++++++++++++
 src/core/state.h  | 19 +++++++++++++++++++
 3 files changed, 52 insertions(+)

diff --git a/src/base/memory.h b/src/base/memory.h
index c9a47bf..ed772ed 100644
--- a/src/base/memory.h
+++ b/src/base/memory.h
@@ -18,6 +18,13 @@
     *(void **)__ptr = nullptr;       \
   } while (0)
 
+#define p_take(dst_p, src_p) \
+  do {                       \
+    p_delete(dst_p);         \
+    *(dst_p) = *(src_p);     \
+    *(src_p) = nullptr;      \
+  } while (0)
+
 static inline char *p_strdup(const char *text) {
   char *r = strdup(text);
   if (!r) abort();
diff --git a/src/core/state.c b/src/core/state.c
index f61342d..227aede 100644
--- a/src/core/state.c
+++ b/src/core/state.c
@@ -7,6 +7,7 @@
 #include "base/array.h"
 #include "base/log.h"
 #include "base/memory.h"
+#include "core/event.h"
 #include "core/layer.h"
 #include "core/types.h"
 #include "core/wm_desc.h"
@@ -435,6 +436,31 @@ void state_window_set_frame_rect(state_t *state, window_id_t window_id,
   window->frame_rect = frame_rect;
 }
 
+bool state_window_take_metadata(state_t *state, window_id_t window_id,
+                                window_metadata_t *metadata,
+                                uint32_t changed_fields) {
+  window_t *window = (window_t *)state_window_get(state, window_id);
+  if (!window) return false;
+
+  if (changed_fields & ZDWM_WINDOW_METADATA_CHANGE_TITLE) {
+    p_take(&window->title, &metadata->title);
+  }
+  if (changed_fields & ZDWM_WINDOW_METADATA_CHANGE_APP_ID) {
+    p_take(&window->app_id, &metadata->app_id);
+  }
+  if (changed_fields & ZDWM_WINDOW_METADATA_CHANGE_ROLE) {
+    p_take(&window->role, &metadata->role);
+  }
+  if (changed_fields & ZDWM_WINDOW_METADATA_CHANGE_CLASS) {
+    p_take(&window->class_name, &metadata->class_name);
+  }
+  if (changed_fields & ZDWM_WINDOW_METADATA_CHANGE_INSTANCE) {
+    p_take(&window->instance_name, &metadata->instance_name);
+  }
+
+  return true;
+}
+
 bool state_window_set_title(state_t *state, window_id_t window_id,
                             const char *title) {
   window_t *window = (window_t *)state_window_get(state, window_id);
diff --git a/src/core/state.h b/src/core/state.h
index df5c3bb..d8c43a1 100644
--- a/src/core/state.h
+++ b/src/core/state.h
@@ -1,9 +1,11 @@
 #pragma once
 
 #include <stddef.h>
+#include <stdint.h>
 
 #include "core/layer.h"
 #include "core/types.h"
+#include "core/window.h"
 #include "core/wm_desc.h"
 
 /* 核心实体定义 */
@@ -167,6 +169,23 @@ void state_window_set_float_rect(state_t *state, window_id_t window_id,
                                  rect_t float_rect);
 void state_window_set_frame_rect(state_t *state, window_id_t window_id,
                                  rect_t frame_rect);
+/**
+ * @brief 按字段掩码转移窗口元数据的所有权
+ * @param state 状态实例指针
+ * @param window_id 目标窗口 id
+ * @param metadata 元数据来源；成功时仅被转移字段会被置空
+ * @param changed_fields 需要转移的字段掩码
+ * @return 成功返回 true；若目标窗口不存在则返回 false
+ * @details
+ * 成功时，仅转移 changed_fields 指定的字段到目标 window，并将 metadata 中对应
+ * 字段置空；未置位字段保持在 metadata 中，所有权仍归调用方。
+ *
+ * 失败时，不接管 metadata 中任何字段的所有权，metadata 保持不变，仍由调用方负
+ * 责后续访问与释放。
+ */
+bool state_window_take_metadata(state_t *state, window_id_t window_id,
+                                window_metadata_t *metadata,
+                                uint32_t changed_fields);
 bool state_window_set_title(state_t *state, window_id_t window_id,
                             const char *title);
 bool state_window_set_app_id(state_t *state, window_id_t window_id,