port dwm "push" patch to dwl

Signed-off-by: Leonardo Hernández Hernández <leohdz172@proton.me>

dwl.c

@@ -113,6 +113,7 @@ typedef struct {
 	unsigned int type; /* XDGShell or X11* */
 	struct wlr_box geom; /* layout-relative, includes border */
 	Monitor *mon;
+	char *output;
 	struct wlr_scene_tree *scene;
 	struct wlr_scene_rect *border[4]; /* top, bottom, left, right */
 	struct wlr_scene_tree *scene_surface;
@@ -388,6 +389,12 @@ static void zoom(const Arg *arg);
 static void bstack(Monitor *m);
 static void bstackhoriz(Monitor *m);
 
+/* push */
+static Client *nexttiled(Client *sel);
+static Client *prevtiled(Client *sel);
+static void pushdown(const Arg *arg);
+static void pushup(const Arg *arg);
+
 /* variables */
 static const char broken[] = "broken";
 static pid_t child_pid = -1;
@@ -1105,6 +1112,7 @@ createmon(struct wl_listener *listener, void *data)
 	size_t i;
 	struct wlr_output_state state;
 	Monitor *m;
+	Client *c;
 
 	if (!wlr_output_init_render(wlr_output, alloc, drw))
 		return;
@@ -1196,6 +1204,13 @@ createmon(struct wl_listener *listener, void *data)
 		wlr_output_layout_add_auto(output_layout, wlr_output);
 	else
 		wlr_output_layout_add(output_layout, wlr_output, m->m.x, m->m.y);
+
+	wl_list_for_each(c, &clients, link) {
+		if (strcmp(wlr_output->name, c->output) == 0) {
+			c->mon = m;
+		}
+	}
+	updatemons(NULL, NULL);
 }
 
 void
@@ -1426,6 +1441,7 @@ destroynotify(struct wl_listener *listener, void *data)
 		wl_list_remove(&c->map.link);
 		wl_list_remove(&c->unmap.link);
 	}
+	free(c->output);
 	free(c);
 }
 
@@ -2136,6 +2152,10 @@ mapnotify(struct wl_listener *listener, void *data)
 	} else {
 		applyrules(c);
 	}
+	c->output = strdup(c->mon->wlr_output->name);
+	if (c->output == NULL) {
+		die("oom");
+	}
 	printstatus();
 
 unset_fullscreen:
@@ -3080,8 +3100,14 @@ void
 tagmon(const Arg *arg)
 {
 	Client *sel = focustop(selmon);
-	if (sel)
-		setmon(sel, dirtomon(arg->i), 0);
+	if (!sel)
+		return;
+	setmon(sel, dirtomon(arg->i), 0);
+	free(sel->output);
+	sel->output = strdup(sel->mon->wlr_output->name);
+	if (sel->output == NULL) {
+		die("oom");
+	}
 }
 
 void
@@ -3755,3 +3781,67 @@ bstackhoriz(Monitor *m) {
 		i++;
 	}
 }
+
+static Client *
+nexttiled(Client *sel) {
+	Client *c;
+	wl_list_for_each(c, &sel->link, link) {
+		if (&c->link == &clients)
+			break;  /* don't wrap */
+		if (!c->isfloating && VISIBLEON(c, selmon))
+			return c;
+	}
+	return NULL;
+}
+
+static Client *
+prevtiled(Client *sel) {
+	Client *c;
+	wl_list_for_each_reverse(c, &sel->link, link) {
+		if (&c->link == &clients)
+			break;  /* don't wrap */
+		if (!c->isfloating && VISIBLEON(c, selmon))
+			return c;
+	}
+	return NULL;
+}
+
+static void
+pushup(const Arg *arg) {
+	Client *sel = focustop(selmon);
+	Client *c;
+
+	if(!sel || sel->isfloating)
+		return;
+	if((c = prevtiled(sel))) {
+		/* attach before c */
+		wl_list_remove(&sel->link);
+		wl_list_insert(c->link.prev, &sel->link);
+	} else {
+		/* move to the end */
+		wl_list_remove(&sel->link);
+		wl_list_insert(clients.prev, &sel->link);
+	}
+	focusclient(sel, 1);
+	arrange(selmon);
+}
+
+static void
+pushdown(const Arg *arg) {
+	Client *sel = focustop(selmon);
+	Client *c;
+
+	if(!sel || sel->isfloating)
+		return;
+	if((c = nexttiled(sel))) {
+		/* attach after c */
+		wl_list_remove(&sel->link);
+		wl_list_insert(&c->link, &sel->link);
+	} else {
+		/* move to the front */
+		wl_list_remove(&sel->link);
+		wl_list_insert(&clients, &sel->link);
+	}
+	focusclient(sel, 1);
+	arrange(selmon);
+}