Add restore-monitor patch

README.org

@@ -9,6 +9,7 @@
 - [[#patches][Patches]]
   - [[#attach-top][Attach Top]]
   - [[#auto-start][Auto Start]]
+  - [[#restore-monitor][Restore Monitor]]
   - [[#warp-cursor][Warp Cursor]]
 - [[#dwl-configuration][dwl Configuration]]
   - [[#appearance][Appearance]]
@@ -70,6 +71,14 @@ Note: Commands from array are executed using execvp(). So if you need to execute
 #define AUTOSTART_PATCH 1
 #+END_SRC
 
+** [[https://codeberg.org/dwl/dwl-patches/src/branch/main/patches/restore-monitor][Restore Monitor]]
+
+Moves clients to their old output when it is reattached.
+
+#+BEGIN_SRC c :tangle patches.def.h
+#define RESTORE_MONITOR_PATCH 1
+#+END_SRC
+
 ** [[https://codeberg.org/dwl/dwl-patches/src/branch/main/patches/warpcursor][Warp Cursor]]
 
 Warp cursor to the centre of newly focused clients.
@@ -82,7 +91,6 @@ This is my version of the orphaned cursorwarp patch except I left out the config
 #define WARPCURSOR_PATCH 1
 #+END_SRC
 
-
 * dwl Configuration
 
 Taken from https://github.com/djpohly/dwl/issues/466.

dwl.c

@@ -110,6 +110,9 @@ typedef struct {
 	unsigned int type; /* XDGShell or X11* */
 	struct wlr_box geom; /* layout-relative, includes border */
 	Monitor *mon;
+#if RESTORE_MONITOR_PATCH
+	char *output;
+#endif // RESTORE_MONITOR_PATCH
 	struct wlr_scene_tree *scene;
 	struct wlr_scene_rect *border[4]; /* top, bottom, left, right */
 	struct wlr_scene_tree *scene_surface;
@@ -1033,6 +1036,9 @@ createmon(struct wl_listener *listener, void *data)
 	size_t i;
 	struct wlr_output_state state;
 	Monitor *m;
+#if RESTORE_MONITOR_PATCH
+	Client *c;
+#endif // RESTORE_MONITOR_PATCH
 
 	if (!wlr_output_init_render(wlr_output, alloc, drw))
 		return;
@@ -1102,6 +1108,15 @@ 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);
+
+#if RESTORE_MONITOR_PATCH
+	wl_list_for_each(c, &clients, link) {
+		if (strcmp(wlr_output->name, c->output) == 0) {
+			c->mon = m;
+		}
+	}
+	updatemons(NULL, NULL);
+#endif // RESTORE_MONITOR_PATCH
 }
 
 void
@@ -1331,6 +1346,9 @@ destroynotify(struct wl_listener *listener, void *data)
 		wl_list_remove(&c->map.link);
 		wl_list_remove(&c->unmap.link);
 	}
+#if RESTORE_MONITOR_PATCH
+	free(c->output);
+#endif // RESTORE_MONITOR_PATCH
 	free(c);
 }
 
@@ -1841,6 +1859,12 @@ mapnotify(struct wl_listener *listener, void *data)
 	} else {
 		applyrules(c);
 	}
+#if RESTORE_MONITOR_PATCH
+	c->output = strdup(c->mon->wlr_output->name);
+	if (c->output == NULL) {
+		die("oom");
+	}
+#endif // RESTORE_MONITOR_PATCH
 	printstatus();
 
 unset_fullscreen:
@@ -2790,8 +2814,19 @@ void
 tagmon(const Arg *arg)
 {
 	Client *sel = focustop(selmon);
-	if (sel)
+#if RESTORE_MONITOR_PATCH
-		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");
+	}
+#else // RESTORE_MONITOR_PATCH
+    if (sel)
+        setmon(sel, dirtomon(arg->i), 0);
+#endif // RESTORE_MONITOR_PATCH
 }
 
 void

patches.def.h

@@ -2,4 +2,6 @@
 
 #define AUTOSTART_PATCH 1
 
+#define RESTORE_MONITOR_PATCH 1
+
 #define WARPCURSOR_PATCH 1

patches/restore-monitor-20240510.patch

@@ -0,0 +1,82 @@
+From e42ca1c539437d3098d80983cfe2ad6f938d7a08 Mon Sep 17 00:00:00 2001
+From: Eldar Yusupov <eyusupov@gmail.com>
+Date: Sun, 17 Mar 2024 19:12:29 +0300
+Subject: [PATCH] Restore correct montior for client when it is reattached
+
+---
+ dwl.c | 24 ++++++++++++++++++++++--
+ 1 file changed, 22 insertions(+), 2 deletions(-)
+
+diff --git a/dwl.c b/dwl.c
+index bf763df..d8d8139 100644
+--- a/dwl.c
++++ b/dwl.c
+@@ -107,6 +107,7 @@ 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;
+@@ -869,6 +870,7 @@ 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;
+@@ -938,6 +940,13 @@ 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
+@@ -1186,6 +1195,7 @@ destroynotify(struct wl_listener *listener, void *data)
+ 		wl_list_remove(&c->map.link);
+ 		wl_list_remove(&c->unmap.link);
+ 	}
++	free(c->output);
+ 	free(c);
+ }
+ 
+@@ -1618,6 +1628,10 @@ 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:
+@@ -2565,8 +2579,14 @@ 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
+-- 
+2.44.0
+