feat(core+backend/X11): 实现窗口状态变更（最大化/最小化/全屏）

src/backend/x11/backend.c

@@ -502,6 +502,33 @@ static void backend_merge_effects(
         XCB_ICCCM_WM_STATE_WITHDRAWN
       );
       break;
+    case ZDWM_EFFECT_MINIMIZE_WINDOW: {
+      auto window                = e->as.minimize.window;
+      xcb_icccm_wm_state_t state = XCB_ICCCM_WM_STATE_NORMAL;
+      if (e->as.minimize.value) state = XCB_ICCCM_WM_STATE_ICONIC;
+      window_set_icccm_wm_state(backend->conn, window, state);
+    } break;
+    case ZDWM_EFFECT_MAXIMIZE_WINDOW: {
+      auto window = e->as.maximize.window;
+      if (e->as.maximize.value) {
+        xcb_atom_t max_atoms[] = {
+          backend->atoms._NET_WM_STATE_MAXIMIZED_HORZ,
+          backend->atoms._NET_WM_STATE_MAXIMIZED_VERT
+        };
+        window_set_net_wm_state(backend, window, countof(max_atoms), max_atoms);
+      } else {
+        window_set_net_wm_state(backend, window, 0, nullptr);
+      }
+    } break;
+    case ZDWM_EFFECT_FULLSCREEN_WINDOW: {
+      auto window = e->as.fullscreen.window;
+      if (e->as.fullscreen.value) {
+        auto fullscreen_atom = backend->atoms._NET_WM_STATE_FULLSCREEN;
+        window_set_net_wm_state(backend, window, 1, &fullscreen_atom);
+      } else {
+        window_set_net_wm_state(backend, window, 0, nullptr);
+      }
+    } break;
     case ZDWM_EFFECT_MOVE_WINDOW: {
       window_configure_t *cfg =
         find_or_push_configure(configs, e->as.move.window);

src/backend/x11/window.c

@@ -340,6 +340,24 @@ void window_set_icccm_wm_state(
   xcb_icccm_set_wm_hints(conn, window, &hints);
 }
 
+void window_set_net_wm_state(
+  backend_t *backend,
+  xcb_window_t window,
+  size_t count,
+  xcb_atom_t *atoms
+) {
+  xcb_change_property(
+    backend->conn,
+    XCB_PROP_MODE_REPLACE,
+    window,
+    backend->atoms._NET_WM_STATE,
+    XCB_ATOM_ATOM,
+    32,
+    count,
+    atoms
+  );
+}
+
 void window_list_push(window_list_t *window_list, xcb_window_t window) {
   xcb_window_t *win =
     array_push(window_list->windows, window_list->count, window_list->capacity);

src/backend/x11/window.h

@@ -3,6 +3,7 @@
 #include <stdbool.h>
 #include <stddef.h>
 #include <string.h>
+#include <xcb/xcb.h>
 #include <xcb/xcb_icccm.h>
 #include <xcb/xproto.h>
 
@@ -89,6 +90,12 @@ void window_set_icccm_wm_state(
   xcb_window_t window,
   xcb_icccm_wm_state_t state
 );
+void window_set_net_wm_state(
+  backend_t *backend,
+  xcb_window_t window,
+  size_t count,
+  xcb_atom_t *atoms
+);
 
 void window_list_push(window_list_t *window_list, xcb_window_t window);
 void window_list_reset(window_list_t *window_list);