fix(policy): 新增窗口后通知原焦点窗口状态变更

新增 window_get_showing_title，按 title → instance_name →
class_name → app_id 优先级取显示标题，窗口快照改用该函数，
避免标题缺失时显示为空。

src/backend/x11/backend.c

@@ -558,6 +558,7 @@ static void backend_merge_effects(
     switch (e->type) {
     case ZDWM_EFFECT_MAP_WINDOW:
       window_list_push(&backend->map, e->as.map.window);
+      window_list_push(&backend->configure, e->as.map.window);
       break;
     case ZDWM_EFFECT_UNMAP_WINDOW:
       window_list_push(&backend->unmap, e->as.unmap.window);
@@ -612,6 +613,9 @@ static void backend_merge_effects(
     case ZDWM_EFFECT_CONFIGURE_WINDOW:
       merge_window_configure_params(backend, &e->as.configure);
       break;
+    case ZDWM_EFFECT_CONFIGURE_NOTIFY:
+      window_list_push(&backend->configure, e->as.configure_notify.window);
+      break;
     case ZDWM_EFFECT_CHANGE_BORDER_COLOR: {
       xcb_change_window_attributes_value_list_t value = {
         .border_pixel = e->as.change_border_color.color->argb
@@ -643,6 +647,46 @@ static void backend_merge_effects(
   }
 }
 
+static void batch_send_configure_notify(
+  xcb_connection_t *conn,
+  xcb_window_t *windows,
+  size_t count
+) {
+  if (count == 0) return;
+
+  auto cookie_list = p_new(xcb_get_geometry_cookie_t, count);
+
+  for (size_t i = 0; i < count; ++i) {
+    auto window = windows[i];
+    cookie_list[i] = xcb_get_geometry(conn, window);
+  }
+
+  uint32_t event_mask = XCB_EVENT_MASK_STRUCTURE_NOTIFY;
+  for (size_t i = 0; i < count; ++i) {
+    auto window = windows[i];
+    auto cookie = cookie_list[i];
+    auto reply = xcb_get_geometry_reply(conn, cookie, nullptr);
+    if (!reply) continue;
+
+    xcb_configure_notify_event_t ev = {
+      .response_type = XCB_CONFIGURE_NOTIFY,
+      .event = window,
+      .window = window,
+      .above_sibling = XCB_WINDOW_NONE,
+      .x = reply->x,
+      .y = reply->y,
+      .width = reply->width,
+      .height = reply->height,
+      .border_width = reply->border_width,
+      .override_redirect = false,
+    };
+    xcb_send_event(conn, false, window, event_mask, (char *)&ev);
+    p_delete(&reply);
+  }
+
+  p_delete(&cookie_list);
+}
+
 static void backend_batch_apply_effects(backend_t *backend) {
   xcb_connection_t *conn = backend->conn;
   if (backend->unmap.count) {
@@ -672,6 +716,12 @@ static void backend_batch_apply_effects(backend_t *backend) {
 
   backend_apply_window_configure_list(backend);
 
+  {
+    auto windows = backend->configure.windows;
+    auto count = backend->configure.count;
+    batch_send_configure_notify(conn, windows, count);
+  }
+
   if (backend->update_focus) {
     backend_focus_window(backend, backend->focus_window);
   }
@@ -687,6 +737,7 @@ bool backend_apply_effect(
   window_list_reset(&backend->unmap);
   window_list_reset(&backend->map);
   window_list_reset(&backend->kill);
+  window_list_reset(&backend->configure);
 
   backend_merge_effects(backend, effects, effect_count);
   backend_batch_apply_effects(backend);

src/backend/x11/internal.h

@@ -115,6 +115,7 @@ typedef struct backend_t {
   window_list_t unmap;
   window_list_t map;
   window_list_t kill;
+  window_list_t configure;
 
   tray_host_t *tray;
 } backend_t;

src/config/defaults.c

@@ -122,7 +122,7 @@ bool config_defaults_build(
   RAISE_OR_RUN(default_mode, Super("e"), editor);
   RAISE_OR_RUN(default_mode, Super("q"), browser);
   RAISE_OR_RUN(default_mode, Super("a"), chrome);
-  BIND_DEFAULT(Super("f"), {.type = ZDWM_ACTION_WINDOW_TOGGLE_FLOATING});
+  BIND_DEFAULT(Super("f"), {.type = ZDWM_ACTION_WINDOW_TOGGLE_FULLSCREEN});
   BIND_DEFAULT(Super("m"), {.type = ZDWM_ACTION_WINDOW_TOGGLE_MAXIMIZE});
   BIND_DEFAULT(
     Super("Control+space"),

src/core/command.h

@@ -11,6 +11,7 @@ typedef enum command_type_t {
   ZDWM_COMMAND_RAISE_WINDOW,
   ZDWM_COMMAND_WITHDRAW_WINDOW,
   ZDWM_COMMAND_CONFIGURE_WINDOW,
+  ZDWM_COMMAND_NOTIFY_CONFIGURE,
   ZDWM_COMMAND_CHANGE_WINDOW_STATE,
   ZDWM_COMMAND_START_MOVE_WINDOW,
   ZDWM_COMMAND_STOP_MOVE_WINDOW,
@@ -102,6 +103,7 @@ typedef struct command_t {
     only_window_data_t raise;
     only_window_data_t withdraw;
     configure_data_t configure;
+    only_window_data_t notify_configure;
     window_state_change_command_t state_change;
     start_interaction_command_t move;
     start_interaction_command_t resize;

src/core/listeners.c

@@ -5,6 +5,7 @@
 #include "core/binding.h"
 #include "core/layout.h"
 #include "core/state.h"
+#include "core/window.h"
 
 #define FOR_EACH_LISTENER(FIELD, BODY)         \
   do {                                         \
@@ -117,7 +118,7 @@ static bool listeners_window_snapshot(
   *out = (zdwm_window_t){
     .workspace = window->workspace_id,
     .id = window->id,
-    .title = window->title,
+    .title = window_get_showing_title(window),
     .focused = workspace->focused_window_id == window->id,
     .urgent = window->urgent,
     .skip_taskbar = window->skip_taskbar,

src/core/plan.c

@@ -121,6 +121,16 @@ void plan_push_resize_effect(plan_t *plan, window_id_t window_id) {
   plan_push_effect(plan, &effect);
 }
 
+void plan_push_configure_notify_effect(plan_t *plan, window_id_t window_id) {
+  if (window_id_invalid(window_id)) return;
+
+  effect_t effect = {
+    .type = ZDWM_EFFECT_CONFIGURE_NOTIFY,
+    .as.configure_notify.window = window_id,
+  };
+  plan_push_effect(plan, &effect);
+}
+
 void plan_push_fullscreen_effect(
   plan_t *plan,
   window_id_t window_id,

src/core/plan.h

@@ -26,6 +26,7 @@ void plan_push_kill_effect(plan_t *plan, window_id_t window_id);
 void plan_push_withdraw_effect(plan_t *plan, window_id_t window_id);
 void plan_push_move_effect(plan_t *plan, window_id_t window_id);
 void plan_push_resize_effect(plan_t *plan, window_id_t window_id);
+void plan_push_configure_notify_effect(plan_t *plan, window_id_t window_id);
 void plan_push_fullscreen_effect(
   plan_t *plan,
   window_id_t window_id,

src/core/policy.c

@@ -771,6 +771,15 @@ static void route_window_state_request(
   command_buffer_push(out, &change_window_state_cmd);
 }
 
+static void
+add_notify_configure_command(command_buffer_t *out, window_id_t window) {
+  command_t notify_cmd = {
+    .type = ZDWM_COMMAND_NOTIFY_CONFIGURE,
+    .as.notify_configure = {.window = window},
+  };
+  command_buffer_push(out, &notify_cmd);
+}
+
 static void route_configure_request(
   state_t *state,
   const configure_data_t *data,
@@ -788,6 +797,7 @@ static void route_configure_request(
   }
 
   if (!state_workspace_show(state, window->workspace_id)) return;
+  add_notify_configure_command(out, data->window);
   if (window_need_layout(window)) return;
   auto workspace = state_workspace_get(state, window->workspace_id);
   if (layout_get(layouts, workspace->layout_id)) return;
@@ -938,10 +948,13 @@ static void manage_window(
   auto window = state_window_add(state, &command->info);
   auto window_id = window->id;
   auto workspace_id = command->workspace;
+  auto workspace = state_workspace_get(state, workspace_id);
+  auto old_focused_window = workspace->focused_window_id;
   state_window_set_workspace(state, window_id, workspace_id);
   set_foucs_window(ctx, workspace_id, window_id, plan);
   plan_push_grab_button_effect(plan, window_id);
   push_window_list_effect(state, plan);
+  listeners_notify_window_updated(ctx->listeners, state, old_focused_window);
   listeners_notify_window_added(ctx->listeners, state, window_id);
 
   if (window_should_fix_size(window)) {
@@ -950,7 +963,6 @@ static void manage_window(
     state_window_set_floating(state, window_id, command->floating);
   }
 
-  auto workspace = state_workspace_get(state, workspace_id);
   auto need_layout = window_need_layout(window);
   auto layout_func = layout_get(ctx->layouts, workspace->layout_id);
 
@@ -1690,6 +1702,9 @@ void policy_apply_command(
     case ZDWM_COMMAND_CONFIGURE_WINDOW:
       configure_window(state, &cmd->as.configure, plan);
       break;
+    case ZDWM_COMMAND_NOTIFY_CONFIGURE:
+      plan_push_configure_notify_effect(plan, cmd->as.notify_configure.window);
+      break;
     case ZDWM_COMMAND_CHANGE_WINDOW_STATE:
       change_window_state(ctx, &cmd->as.state_change, plan);
       break;

src/core/window.c

@@ -145,3 +145,11 @@ bool window_can_resize(const window_t *window) {
 
   return true;
 }
+
+const char *window_get_showing_title(const window_t *window) {
+  if (window->title) return window->title;
+  if (window->instance_name) return window->instance_name;
+  if (window->class_name) return window->class_name;
+  if (window->app_id) return window->app_id;
+  return nullptr;
+}

src/core/window.h

@@ -67,3 +67,4 @@ bool window_need_resize(const window_t *window, int32_t width, int32_t height);
 bool window_should_has_border(const window_t *window);
 bool window_should_fix_size(const window_t *window);
 bool window_can_resize(const window_t *window);
+const char *window_get_showing_title(const window_t *window);

src/interface/effect.h

@@ -17,6 +17,7 @@ typedef enum effect_type_t {
   ZDWM_EFFECT_MAXIMIZE_WINDOW,
   ZDWM_EFFECT_FULLSCREEN_WINDOW,
   ZDWM_EFFECT_CONFIGURE_WINDOW,
+  ZDWM_EFFECT_CONFIGURE_NOTIFY,
   ZDWM_EFFECT_CHANGE_BORDER_COLOR,
   ZDWM_EFFECT_CHANGE_WINDOW_LIST,
   ZDWM_EFFECT_RESTACK_WINDOWS,
@@ -86,6 +87,7 @@ typedef struct effect_t {
     effect_bool_window_t maximize;
     effect_bool_window_t fullscreen;
     configure_data_t configure;
+    only_window_data_t configure_notify;
     effect_change_border_color_t change_border_color;
     effect_window_list_t change_window_list;
     effect_window_list_t restack_windows;