feat(core+backend/X11): 区分窗口销毁和撤销

src/backend/x11/backend.c

@@ -9,6 +9,7 @@
 #include <xcb/randr.h>
 #include <xcb/xcb.h>
 #include <xcb/xcb_aux.h>
+#include <xcb/xcb_icccm.h>
 #include <xcb/xcb_keysyms.h>
 #include <xcb/xfixes.h>
 #include <xcb/xinerama.h>
@@ -494,6 +495,13 @@ static void backend_merge_effects(
     case ZDWM_EFFECT_KILL_WINDOW:
       window_list_push(&backend->kill, e->as.kill.window);
       break;
+    case ZDWM_EFFECT_WITHDRAW_WINDOW:
+      window_set_icccm_wm_state(
+        backend->conn,
+        e->as.withdraw.window,
+        XCB_ICCCM_WM_STATE_WITHDRAWN
+      );
+      break;
     case ZDWM_EFFECT_MOVE_WINDOW: {
       window_configure_t *cfg =
         find_or_push_configure(configs, e->as.move.window);

src/backend/x11/event.c

@@ -173,7 +173,11 @@ static bool handle_unmap_notify(
 ) {
   event->type                    = ZDWM_EVENT_WINDOW_REMOVE;
   event->as.window_remove.window = xcb_event->window;
-  event->as.window_remove.reason = ZDWM_WINDOW_REMOVE_WITHDRAWN;
+  if (XCB_EVENT_SENT(xcb_event)) {
+    event->as.window_remove.reason = ZDWM_WINDOW_REMOVE_WITHDRAWN;
+  } else {
+    event->as.window_remove.reason = ZDWM_WINDOW_REMOVE_DESTROY;
+  }
 
   return true;
 }
@@ -251,7 +255,8 @@ bool backend_next_event(backend_t *backend, event_t *event) {
     uint8_t response_type = XCB_EVENT_RESPONSE_TYPE(raw_event);
     bool handled          = false;
 
-    printf("xcb event type: %u\n", response_type);
+    auto label = xcb_event_get_label(response_type);
+    printf("xcb event type: %s[%u]\n", label, response_type);
 
     switch (response_type) {
 #define EVENT(type, handler)                              \

src/backend/x11/window.c

@@ -319,6 +319,27 @@ void window_clean_event_mask(xcb_connection_t *conn, xcb_window_t window) {
   xcb_change_window_attributes_aux(conn, window, change_mask, &value_list);
 }
 
+void window_set_icccm_wm_state(
+  xcb_connection_t *conn,
+  xcb_window_t window,
+  xcb_icccm_wm_state_t state
+) {
+  xcb_icccm_wm_hints_t hints;
+  xcb_icccm_wm_hints_set_none(&hints);
+  switch (state) {
+  case XCB_ICCCM_WM_STATE_WITHDRAWN:
+    xcb_icccm_wm_hints_set_withdrawn(&hints);
+    break;
+  case XCB_ICCCM_WM_STATE_NORMAL:
+    xcb_icccm_wm_hints_set_normal(&hints);
+    break;
+  case XCB_ICCCM_WM_STATE_ICONIC:
+    xcb_icccm_wm_hints_set_iconic(&hints);
+    break;
+  }
+  xcb_icccm_set_wm_hints(conn, window, &hints);
+}
+
 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

@@ -84,6 +84,11 @@ void window_kill(backend_t *backend, xcb_window_t window);
 void root_set_event_mask(backend_t *backend);
 void window_set_event_mask(xcb_connection_t *conn, xcb_window_t window);
 void window_clean_event_mask(xcb_connection_t *conn, xcb_window_t window);
+void window_set_icccm_wm_state(
+  xcb_connection_t *conn,
+  xcb_window_t window,
+  xcb_icccm_wm_state_t state
+);
 
 void window_list_push(window_list_t *window_list, xcb_window_t window);
 void window_list_reset(window_list_t *window_list);

src/core/command.h

@@ -6,6 +6,7 @@
 typedef enum command_type_t {
   ZDWM_COMMAND_MANAGE_WINDOW,
   ZDWM_COMMAND_UNMANAGE_WINDOW,
+  ZDWM_COMMAND_WITHDRAW_WINDOW,
   ZDWM_COMMAND_FOCUS_WINDOW,
   ZDWM_COMMAND_KILL_WINDOW,
   ZDWM_COMMAND_SWITCH_WORKSPACE,
@@ -40,6 +41,7 @@ typedef struct command_t {
   union {
     manage_window_command_t manage_window;
     only_window_command_t unmanage;
+    only_window_command_t withdraw;
     only_window_command_t focus;
     only_window_command_t kill;
     switch_workspace_command_t switch_workspace;

src/core/plan.h

@@ -10,6 +10,7 @@ typedef enum effect_type_t {
   ZDWM_EFFECT_UNMAP_WINDOW,
   ZDWM_EFFECT_FOCUS_WINDOW,
   ZDWM_EFFECT_KILL_WINDOW,
+  ZDWM_EFFECT_WITHDRAW_WINDOW,
   ZDWM_EFFECT_MOVE_WINDOW,
   ZDWM_EFFECT_RESIZE_WINDOW,
   ZDWM_EFFECT_CHANGE_BORDER_COLOR,
@@ -61,6 +62,7 @@ typedef struct effect_t {
     effect_only_window_id_t unmap;
     effect_only_window_id_t focus;
     effect_only_window_id_t kill;
+    effect_only_window_id_t withdraw;
     effect_move_window_t move;
     effect_resize_window_t resize;
     effect_change_border_color_t change_border_color;

src/core/policy.c

@@ -119,11 +119,22 @@ static void route_window_remove(
   const window_t *window = state_window_get(state, e->window);
   if (!window) return;
 
-  command_t unmanage_window_cmd = {
-    .type               = ZDWM_COMMAND_UNMANAGE_WINDOW,
-    .as.unmanage.window = e->window,
-  };
-  command_buffer_push(out, &unmanage_window_cmd);
+  switch (e->reason) {
+  case ZDWM_WINDOW_REMOVE_WITHDRAWN:
+    command_t withdrawn_window_cmd = {
+      .type               = ZDWM_COMMAND_WITHDRAW_WINDOW,
+      .as.withdraw.window = e->window,
+    };
+    command_buffer_push(out, &withdrawn_window_cmd);
+    break;
+  case ZDWM_WINDOW_REMOVE_DESTROY:
+    command_t unmanage_window_cmd = {
+      .type               = ZDWM_COMMAND_UNMANAGE_WINDOW,
+      .as.unmanage.window = e->window,
+    };
+    command_buffer_push(out, &unmanage_window_cmd);
+    break;
+  }
 }
 
 void policy_route_event(
@@ -232,6 +243,18 @@ static void unmanage_window(state_t *state, window_id_t window, plan_t *plan) {
   }
 }
 
+static void
+withdraw_window(const state_t *state, window_id_t window, plan_t *plan) {
+  auto win = state_window_get(state, window);
+  if (!win) return;
+
+  effect_t withdraw_window_effect = {
+    .type               = ZDWM_EFFECT_WITHDRAW_WINDOW,
+    .as.withdraw.window = win->id,
+  };
+  plan_push_effect(plan, &withdraw_window_effect);
+}
+
 static void focus_window(state_t *state, window_id_t window, plan_t *plan) {
   auto win = state_window_get(state, window);
   if (!win) return;
@@ -298,6 +321,9 @@ void policy_apply_command(
     case ZDWM_COMMAND_UNMANAGE_WINDOW:
       unmanage_window(state, cmd->as.unmanage.window, plan);
       break;
+    case ZDWM_COMMAND_WITHDRAW_WINDOW:
+      withdraw_window(state, cmd->as.withdraw.window, plan);
+      break;
     case ZDWM_COMMAND_FOCUS_WINDOW:
       focus_window(state, cmd->as.focus.window, plan);
       break;