modules: Implement workspace move event

Implementing the move event required to pass the IPC socket to
`i3_ipc_callback_t`, because we won't get notified about any visibility
changes of other workspaces.  That's why we query all workspaces again
after a focused workspace was moved.

modules/i3-common.c

@@ -309,7 +309,7 @@ i3_receive_loop(int abort_fd, int sock,
             }
 
             if (pkt_handler != NULL)
-                err = !pkt_handler(hdr->type, json, data);
+                err = !pkt_handler(sock, hdr->type, json, data);
             else
                 LOG_DBG("no handler for reply/event %d; ignoring", hdr->type);
 

modules/i3-common.h

@@ -11,7 +11,7 @@
 bool i3_get_socket_address(struct sockaddr_un *addr);
 bool i3_send_pkg(int sock, int cmd, char *data);
 
-typedef bool (*i3_ipc_callback_t)(int type, const struct json_object *json, void *data);
+typedef bool (*i3_ipc_callback_t)(int sock, int type, const struct json_object *json, void *data);
 
 struct i3_ipc_callbacks {
     void (*burst_done)(void *data);

modules/i3.c

@@ -213,7 +213,7 @@ workspace_lookup(struct private *m, int id)
 }
 
 static bool
-handle_get_version_reply(int type, const struct json_object *json, void *_m)
+handle_get_version_reply(int sock, int type, const struct json_object *json, void *_m)
 {
     struct json_object *version;
     if (!json_object_object_get_ex(json, "human_readable", &version)) {
@@ -226,7 +226,7 @@ handle_get_version_reply(int type, const struct json_object *json, void *_m)
 }
 
 static bool
-handle_subscribe_reply(int type, const struct json_object *json, void *_m)
+handle_subscribe_reply(int sock, int type, const struct json_object *json, void *_m)
 {
     struct json_object *success;
     if (!json_object_object_get_ex(json, "success", &success)) {
@@ -243,7 +243,7 @@ handle_subscribe_reply(int type, const struct json_object *json, void *_m)
 }
 
 static bool
-handle_get_workspaces_reply(int type, const struct json_object *json, void *_mod)
+handle_get_workspaces_reply(int sock, int type, const struct json_object *json, void *_mod)
 {
     struct module *mod = _mod;
     struct private *m = mod->private;
@@ -272,7 +272,7 @@ handle_get_workspaces_reply(int type, const struct json_object *json, void *_mod
 }
 
 static bool
-handle_workspace_event(int type, const struct json_object *json, void *_mod)
+handle_workspace_event(int sock, int type, const struct json_object *json, void *_mod)
 {
     struct module *mod = _mod;
     struct private *m = mod->private;
@@ -289,6 +289,7 @@ handle_workspace_event(int type, const struct json_object *json, void *_mod)
     bool is_empty = strcmp(change_str, "empty") == 0;
     bool is_focused = strcmp(change_str, "focus") == 0;
     bool is_rename = strcmp(change_str, "rename") == 0;
+    bool is_move = strcmp(change_str, "move") == 0;
     bool is_urgent = strcmp(change_str, "urgent") == 0;
 
     struct json_object *current, *_current_id;
@@ -384,6 +385,29 @@ handle_workspace_event(int type, const struct json_object *json, void *_mod)
         workspace_add(m, ws);
     }
 
+    else if (is_move) {
+        struct workspace *w = workspace_lookup(m, current_id);
+        assert(w != NULL);
+
+        struct json_object *_current_output;
+        if (!json_object_object_get_ex(current, "output", &_current_output)) {
+            LOG_ERR("workspace 'move' event without 'output' property");
+            mtx_unlock(&mod->lock);
+            return false;
+        }
+
+        free(w->output);
+        w->output = strdup(json_object_get_string(_current_output));
+
+        /*
+         * If the moved workspace was focused, schedule a full update because
+         * visibility for other workspaces may have changed.
+         */
+        if (w->focused) {
+            i3_send_pkg(sock, I3_IPC_MESSAGE_TYPE_GET_WORKSPACES, NULL);
+        }
+    }
+
     else if (is_urgent) {
         struct json_object *urgent;
         if (!json_object_object_get_ex(current, "urgent", &urgent)) {
@@ -410,7 +434,7 @@ err:
 }
 
 static bool
-handle_window_event(int type, const struct json_object *json, void *_mod)
+handle_window_event(int sock, int type, const struct json_object *json, void *_mod)
 {
     struct module *mod = _mod;
     struct private *m = mod->private;
@@ -536,7 +560,7 @@ handle_window_event(int type, const struct json_object *json, void *_mod)
 }
 
 static bool
-handle_mode_event(int type, const struct json_object *json, void *_mod)
+handle_mode_event(int sock, int type, const struct json_object *json, void *_mod)
 {
     struct module *mod = _mod;
     struct private *m = mod->private;

modules/sway-xkb.c

@@ -90,7 +90,7 @@ content(struct module *mod)
 }
 
 static bool
-handle_input_reply(int type, const struct json_object *json, void *_mod)
+handle_input_reply(int sock, int type, const struct json_object *json, void *_mod)
 {
     struct module *mod = _mod;
     struct private *m = mod->private;
@@ -155,7 +155,7 @@ handle_input_reply(int type, const struct json_object *json, void *_mod)
 }
 
 static bool
-handle_input_event(int type, const struct json_object *json, void *_mod)
+handle_input_event(int sock, int type, const struct json_object *json, void *_mod)
 {
     struct module *mod = _mod;
     struct private *m = mod->private;