feat: add consume & expel for scroller stack

src/config/parse_config.h

@@ -537,6 +537,10 @@ int32_t parse_direction(const char *str) {
 		return LEFT;
 	} else if (strcmp(lowerStr, "right") == 0) {
 		return RIGHT;
+	} else if (strcmp(lowerStr, "consume") == 0) {
+		return CONSUME;
+	} else if (strcmp(lowerStr, "expel") == 0) {
+		return EXPEL;
 	} else {
 		return UNDIR;
 	}

src/dispatch/bind_define.h

@@ -1855,6 +1855,41 @@ int32_t scroller_stack(const Arg *arg) {
 	if (!c || !c->mon || c->isfloating || !is_scroller_layout(selmon))
 		return 0;
 
+	if (arg->i == CONSUME) {
+		bool is_horizontal_layout =
+			c->mon->pertag->ltidxs[c->mon->pertag->curtag]->id == SCROLLER;
+		int32_t consume_dir = is_horizontal_layout ? RIGHT : DOWN;
+
+		Client *target_client = find_client_by_direction(c, &(Arg){.i = consume_dir}, false, true);
+
+		if (target_client) {
+			Client *stack_tail = get_scroll_stack_head(c);
+			while (stack_tail->next_in_stack) {
+				stack_tail = stack_tail->next_in_stack;
+			}
+
+			scroller_insert_stack(target_client, stack_tail, false);
+		}
+		return 0;
+	}
+
+	if (arg->i == EXPEL) {
+		Client *stack_head = get_scroll_stack_head(c);
+		Client *stack_tail = stack_head;
+
+		while (stack_tail->next_in_stack) {
+			stack_tail = stack_tail->next_in_stack;
+		}
+
+		if (stack_tail != stack_head) {
+			exit_scroller_stack(stack_tail);
+			wl_list_remove(&stack_tail->link);
+			wl_list_insert(&stack_head->link, &stack_tail->link);
+			arrange(selmon, false, false);
+		}
+		return 0;
+	}
+
 	Client *target_client = find_client_by_direction(c, arg, false, true);
 
 	return scroller_apply_stack(c, target_client, arg->i);

src/mango.c

@@ -172,7 +172,7 @@ enum {
 	NetLast
 }; /* EWMH atoms */
 #endif
-enum { UP, DOWN, LEFT, RIGHT, UNDIR }; /* smartmovewin */
+enum { UP, DOWN, LEFT, RIGHT, UNDIR, CONSUME, EXPEL }; /* smartmovewin */
 enum { NONE, OPEN, MOVE, CLOSE, TAG, FOCUS, OPAFADEIN, OPAFADEOUT };
 enum { UNFOLD, FOLD, INVALIDFOLD };
 enum { PREV, NEXT };