实现 wm_scan_clients 函数

src/event.c

@@ -2,7 +2,6 @@
 
 #include <glib.h>
 #include <stdint.h>
-#include <string.h>
 #include <xcb/xcb.h>
 #include <xcb/xcb_event.h>
 #include <xcb/xcb_keysyms.h>
@@ -107,10 +106,8 @@ static void key_press(xcb_key_press_event_t *ev) {
 }
 
 static void map_request(xcb_map_request_event_t *ev) {
-  xcb_get_window_attributes_cookie_t wa_cookie =
-    xcb_get_window_attributes_unchecked(wm.xcb_conn, ev->window);
   xcb_get_window_attributes_reply_t *wa_reply =
-    xcb_get_window_attributes_reply(wm.xcb_conn, wa_cookie, nullptr);
+    xwindow_get_attributes_reply(ev->window);
 
   if (!wa_reply) return;
   if (wa_reply->override_redirect) {
@@ -120,10 +117,8 @@ static void map_request(xcb_map_request_event_t *ev) {
 
   client_t *c = client_get_by_window(ev->window);
   if (!c) {
-    xcb_get_geometry_cookie_t geo_cookie =
-      xcb_get_geometry(wm.xcb_conn, ev->window);
     xcb_get_geometry_reply_t *geo_reply =
-      xcb_get_geometry_reply(wm.xcb_conn, geo_cookie, nullptr);
+      xwindow_get_geometry_reply(ev->window);
     if (!geo_reply) {
       p_delete(&wa_reply);
       return;

src/wm.c

@@ -243,7 +243,67 @@ void wm_detect_monitor(void) {
   wm.current_monitor = monitor;
 }
 
-void wm_scan_clients(void) {}
+typedef struct window_list_t {
+  xcb_window_t *normal_list;
+  xcb_window_t *transient_list;
+  uint32_t normal_count;
+  uint32_t transient_count;
+} window_list_t;
+void wm_scan_clients(void) {
+  xcb_query_tree_cookie_t cookie = xcb_query_tree(wm.xcb_conn, wm.screen->root);
+  xcb_query_tree_reply_t *tree_reply =
+    xcb_query_tree_reply(wm.xcb_conn, cookie, nullptr);
+  if (!tree_reply) return;
+
+  xcb_window_t *list = xcb_query_tree_children(tree_reply);
+  int len = xcb_query_tree_children_length(tree_reply);
+  if (!len) {
+    p_delete(&tree_reply);
+    return;
+  }
+
+  xcb_get_window_attributes_reply_t *wa_reply = nullptr;
+  xcb_get_geometry_reply_t *geo_reply = nullptr;
+  for (int i = 0; i < len; i++) {
+    xcb_window_t window = list[i];
+    wa_reply = xwindow_get_attributes_reply(window);
+    if (!wa_reply) continue;
+
+    uint8_t override_redirect = wa_reply->override_redirect;
+    uint8_t map_state = wa_reply->map_state;
+    p_delete(&wa_reply);
+
+    if (override_redirect || xwindow_get_transient_for(window)) continue;
+
+    geo_reply = xwindow_get_geometry_reply(window);
+    if (!geo_reply) continue;
+
+    if (map_state == XCB_MAP_STATE_VIEWABLE ||
+        xwindow_get_state(window) == XCB_ICCCM_WM_STATE_ICONIC) {
+      client_manage(window, geo_reply);
+    }
+    p_delete(&geo_reply);
+  }
+  for (int i = 0; i < len; i++) {
+    xcb_window_t window = list[i];
+    wa_reply = xwindow_get_attributes_reply(window);
+    if (!wa_reply) continue;
+
+    uint8_t map_state = wa_reply->map_state;
+    p_delete(&wa_reply);
+
+    geo_reply = xwindow_get_geometry_reply(window);
+    if (!geo_reply) continue;
+
+    if (xwindow_get_transient_for(window) &&
+        (map_state == XCB_MAP_STATE_VIEWABLE ||
+         xwindow_get_state(window) == XCB_ICCCM_WM_STATE_ICONIC)) {
+      client_manage(window, geo_reply);
+    }
+    p_delete(&geo_reply);
+  }
+  p_delete(&tree_reply);
+}
 
 void wm_clean(void) {
   text_clean_pango_layout();
@@ -483,6 +543,7 @@ int main(int argc, char *argv[]) {
   wm_detect_monitor();
   wm_setup();
   setup_event_loop();
+  wm_scan_clients();
 
   debug_show_monitor_list();
 

src/xwindow.c

@@ -205,3 +205,37 @@ void xwindow_get_text_property(xcb_window_t window, xcb_atom_t property,
 
   p_delete(&reply);
 }
+
+xcb_window_t xwindow_get_transient_for(xcb_window_t window) {
+  xcb_connection_t *conn = wm.xcb_conn;
+  xcb_window_t t_window = XCB_WINDOW_NONE;
+  xcb_get_property_cookie_t cookie =
+    xcb_icccm_get_wm_transient_for(conn, window);
+  xcb_icccm_get_wm_transient_for_reply(conn, cookie, &t_window, nullptr);
+  return t_window;
+}
+
+/**
+ * @brief 获取窗口的状态
+ * @param window 目标窗口
+ * @returns 成功返回 xcb_icccm_wm_state_t 枚举类型，失败返回 -1
+ */
+int32_t xwindow_get_state(xcb_window_t window) {
+  xcb_connection_t *conn = wm.xcb_conn;
+  xcb_icccm_wm_hints_t hints;
+  xcb_get_property_cookie_t cookie = xcb_icccm_get_wm_hints(conn, window);
+  if (!xcb_icccm_get_wm_hints_reply(conn, cookie, &hints, nullptr)) return -1;
+  return hints.initial_state;
+}
+
+xcb_get_geometry_reply_t *xwindow_get_geometry_reply(xcb_window_t window) {
+  xcb_get_geometry_cookie_t cookie = xcb_get_geometry(wm.xcb_conn, window);
+  return xcb_get_geometry_reply(wm.xcb_conn, cookie, nullptr);
+}
+
+xcb_get_window_attributes_reply_t *xwindow_get_attributes_reply(
+  xcb_window_t window) {
+  xcb_get_window_attributes_cookie_t wa_cookie =
+    xcb_get_window_attributes(wm.xcb_conn, window);
+  return xcb_get_window_attributes_reply(wm.xcb_conn, wa_cookie, nullptr);
+}

src/xwindow.h

@@ -20,6 +20,11 @@ bool xwindow_send_event(xcb_window_t window, xcb_atom_t atom);
 void xwindow_focus(xcb_window_t window);
 void xwindow_get_text_property(xcb_window_t window, xcb_atom_t property,
                                char **out);
+xcb_window_t xwindow_get_transient_for(xcb_window_t window);
+int32_t xwindow_get_state(xcb_window_t window);
+xcb_get_geometry_reply_t *xwindow_get_geometry_reply(xcb_window_t window);
+xcb_get_window_attributes_reply_t *xwindow_get_attributes_reply(
+  xcb_window_t window);
 
 #define xwindow_set_name_static(window, name)                    \
   xcb_icccm_set_wm_name(wm.xcb_conn, window, XCB_ATOM_STRING, 8, \