处理窗口销毁事件

src/include/event-adapter.h

@@ -1,5 +1,6 @@
 #pragma once
 
+#include <stdbool.h>
 #include <stdint.h>
 #include <xcb/xproto.h>
 
@@ -78,10 +79,12 @@ typedef struct map_request_event_t {
 typedef struct unmap_notify_event_t {
   event_type_t type;
   xcb_window_t window;
+  bool send_event;
 } unmap_notify_event_t;
 
 typedef struct destroy_notify_event_t {
   event_type_t type;
+  xcb_window_t window;
 } destroy_notify_event_t;
 
 typedef struct expose_event_t {

src/include/xcb.h

@@ -46,7 +46,7 @@ void map_window(xcb_window_t window);
  * @returns 返回窗口名字符串指针，使用完后记得使用 free 释放内存
  */
 char *get_window_name(xcb_window_t window);
-void init_window_event_mask(xcb_window_t window);
+void set_window_event_mask(xcb_window_t window, bool clear);
 void change_window_border_color(xcb_window_t window, uint32_t argb);
 void focus_window(xcb_window_t window);
 
@@ -112,5 +112,6 @@ typedef enum wm_state_t {
 } wm_state_t;
 int32_t get_window_state(xcb_window_t window);
 void set_window_state(xcb_window_t window, wm_state_t state);
+void set_window_list(xcb_window_t *list, uint32_t length);
 
 bool get_pointer_position(int32_t *x, int32_t *y);

src/main.c

@@ -39,11 +39,13 @@ static void key_press(key_press_event_t *event);
 static void configure_request(configure_request_event_t *event);
 static void map_request(map_request_event_t *event);
 static void unmap_notify(unmap_notify_event_t *event);
+static void destroy_notify(destroy_notify_event_t *event);
 static void motion_notify(motion_notify_event_t *event);
 static void enter_notify(enter_notify_event_t *event);
 static void focus_in(focus_in_event_t *event);
 static void manage_window(xcb_window_t window);
-static void unmanage_client(client_t *client);
+static void unmanage_client(client_t *client, bool destroyed);
+static void update_client_list(void);
 static void update_client_name(client_t *client);
 static void apply_rules(client_t *client);
 static uint32_t get_tags_mask_of_monitor(monitor_t *monitor);
@@ -465,6 +467,7 @@ void xcb_event_handler(generic_event_t *event, void *user_data) {
     EVENT(EVENT_TYPE_CONFIGURE_REQUEST, configure_request);
     EVENT(EVENT_TYPE_MAP_REQUEST, map_request);
     EVENT(EVENT_TYPE_UNMAP_NOTIFY, unmap_notify);
+    EVENT(EVENT_TYPE_DESTROY_NOTIFY, destroy_notify);
     EVENT(EVENT_TYPE_MOTION_NOTIFY, motion_notify);
     EVENT(EVENT_TYPE_ENTER_NOTIFY, enter_notify);
     EVENT(EVENT_TYPE_FOCUS_IN, focus_in);
@@ -512,8 +515,17 @@ void map_request(map_request_event_t *event) {
 void unmap_notify(unmap_notify_event_t *event) {
   client_t *c = get_client_of_window(event->window);
   if (c) {
-    unmanage_client(c);
+    if (event->send_event) {
+      set_window_state(event->window, wm_state_withdrawn);
+    } else {
+      unmanage_client(c, false);
     }
+  }
+}
+
+void destroy_notify(destroy_notify_event_t *event) {
+  client_t *c = get_client_of_window(event->window);
+  if (c) unmanage_client(c, true);
 }
 
 void motion_notify(motion_notify_event_t *event) {
@@ -586,7 +598,7 @@ void manage_window(xcb_window_t window) {
 
   attach_client(c);
   attach_stack_client(c);
-  init_window_event_mask(window);
+  set_window_event_mask(window, false);
   change_window_border_color(window, color_set->border_color.argb);
   if (c->monitor == current_monitor) {
     unfocus(current_monitor->selected_client, false);
@@ -596,14 +608,41 @@ void manage_window(xcb_window_t window) {
   focus(NULL);
 }
 
-void unmanage_client(client_t *client) {
+void unmanage_client(client_t *client, bool destroyed) {
   monitor_t *monitor = client->monitor;
 
   detach_client(client);
   detach_stack_client(client);
-  free(client);
-  arrange(monitor);
+  if (!destroyed) {
+    set_window_event_mask(client->window, true);
+    configure_window(client->window, client->x, client->y, client->width,
+                     client->height, client->old_border_width);
+    set_window_state(client->window, wm_state_withdrawn);
     flush_xcb_connection();
+  }
+  free(client);
+  focus(NULL);
+  update_client_list();
+  arrange(monitor);
+}
+
+void update_client_list(void) {
+  uint32_t length = 0;
+  for (monitor_t *m = monitors; m; m = m->next) {
+    for (client_t *c = m->clients; c; c = c->next) length++;
+  }
+  if (!length) {
+    set_window_list(NULL, length);
+    return;
+  }
+
+  xcb_window_t *list = ecalloc(length, sizeof(xcb_window_t));
+  uint32_t i = 0;
+  for (monitor_t *m = monitors; m; m = m->next) {
+    for (client_t *c = m->clients; c; c = c->next) list[i++] = c->window;
+  }
+  set_window_list(list, length);
+  free(list);
 }
 
 void update_client_name(client_t *client) {
@@ -842,7 +881,7 @@ void cleanup(void) {
   while (m) {
     while (c) {
       client_t *tc = c->next;
-      free(c);
+      unmanage_client(c, false);
       c = tc;
     }
     monitor_t *next_monitor = m->next;

src/xcb/event.c

@@ -65,10 +65,14 @@ static void convert_event(xcb_generic_event_t *xcb_event,
       xcb_unmap_notify_event_t *ev = (xcb_unmap_notify_event_t *)xcb_event;
       event->unmap_notify.type = EVENT_TYPE_UNMAP_NOTIFY;
       event->unmap_notify.window = ev->window;
+      event->unmap_notify.send_event = XCB_EVENT_SENT(ev);
     } break;
-    case XCB_DESTROY_NOTIFY:
-      event->type = EVENT_TYPE_DESTROY_NOTIFY;
+    case XCB_DESTROY_NOTIFY: {
+      xcb_destroy_notify_event_t *ev = (xcb_destroy_notify_event_t *)xcb_event;
+      event->destroy_notify.type = EVENT_TYPE_DESTROY_NOTIFY;
+      event->destroy_notify.window = ev->window;
       break;
+    }
     case XCB_EXPOSE:
       event->type = EVENT_TYPE_EXPOSE;
       break;

src/xcb/window.c

@@ -274,13 +274,14 @@ char *get_window_name(xcb_window_t window) {
   }
 }
 
-void init_window_event_mask(xcb_window_t window) {
+void set_window_event_mask(xcb_window_t window, bool clear) {
   xcb_cw_t change_mask = XCB_CW_EVENT_MASK;
-  xcb_params_cw_t params = {
-    .event_mask = XCB_EVENT_MASK_ENTER_WINDOW | XCB_EVENT_MASK_FOCUS_CHANGE |
+  uint32_t event_mask = clear ? XCB_EVENT_MASK_NO_EVENT
+                              : XCB_EVENT_MASK_ENTER_WINDOW |
+                                  XCB_EVENT_MASK_FOCUS_CHANGE |
                                   XCB_EVENT_MASK_PROPERTY_CHANGE |
-                  XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY,
-  };
+                                  XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY;
+  xcb_params_cw_t params = {.event_mask = event_mask};
   xcb_aux_change_window_attributes(conn, window, change_mask, &params);
 }
 

src/xcb/wm-extension.c

@@ -2,6 +2,7 @@
 #include <stdint.h>
 #include <string.h>
 #include <xcb/xcb.h>
+#include <xcb/xcb_ewmh.h>
 #include <xcb/xcb_icccm.h>
 #include <xcb/xproto.h>
 
@@ -149,3 +150,14 @@ void set_window_state(xcb_window_t window, wm_state_t state) {
   }
   xcb_icccm_set_wm_hints(conn, window, &hints);
 }
+
+void set_window_list(xcb_window_t *list, uint32_t length) {
+  int screen_nbr = 0;
+  for (int i = 0; i < ewmh->nb_screens; i++) {
+    if (screen == ewmh->screens[i]) {
+      screen_nbr = i;
+      break;
+    }
+  }
+  xcb_ewmh_set_client_list(ewmh, screen_nbr, length, list);
+}

src/xcb/xcb.c

@@ -184,10 +184,11 @@ window_list_t *scan_window_list(void) {
 
   xcb_window_t *list = xcb_query_tree_children(tree_reply);
   int len = xcb_query_tree_children_length(tree_reply);
+  if (!len) return NULL;
 
   uint32_t normal_count = 0, transient_count = 0;
-  xcb_window_t normal_window_array[len];
-  xcb_window_t transient_window_array[len];
+  xcb_window_t *normal_window_array = ecalloc(len, sizeof(xcb_window_t));
+  xcb_window_t *transient_window_array = ecalloc(len, sizeof(xcb_window_t));
   for (int i = 0; i < len; i++) {
     xcb_window_t window = list[i];
 
@@ -214,25 +215,12 @@ window_list_t *scan_window_list(void) {
   }
   free(tree_reply);
 
-  if ((!normal_count) && (!transient_count)) return NULL;
-
   window_list_t *r = ecalloc(1, sizeof(window_list_t));
+  r->normal_list = normal_window_array;
+  r->transient_list = transient_window_array;
   r->normal_count = normal_count;
   r->transient_count = transient_count;
 
-  if (normal_count) {
-    r->normal_list = ecalloc(normal_count, sizeof(xcb_window_t));
-    for (uint32_t i = 0; i < normal_count; i++) {
-      r->normal_list[i] = normal_window_array[i];
-    }
-  }
-  if (transient_count) {
-    r->transient_list = ecalloc(transient_count, sizeof(xcb_window_t));
-    for (uint32_t i = 0; i < transient_count; i++) {
-      r->transient_list[i] = transient_window_array[i];
-    }
-  }
-
   return r;
 }