Add monchange patch

patches/monchange/README.md

@@ -0,0 +1,19 @@
+### Description
+
+Allows one to configure a script that runs whenever on monitor configuration
+change is detected.
+
+This script is declared an Arg (just like any command run by spawn). It
+can be configured through `monchange` in your config.h.
+
+As an example usage, one could write a script that automatically configures
+the wallpaper on every display.
+
+### Download
+- [monchange-0.7](/dwl/dwl-patches/raw/branch/main/patches/monchange/monchange-0.7.patch)
+
+### Authors
+- [ChausseBenjamin](https://codeberg.org/ChausseBenjamin)
+  benjamin@chausse.xyz
+  whisperwood at [Libera IRC dwl channel](https://web.libera.chat/?channels=#dwl)
+  whisperwood at [dwl Discord](https://discord.gg/jJxZnrGPWN)

patches/monchange/monchange-0.7.patch

@@ -0,0 +1,55 @@
+From ddd9c82891bc14fb8de10a157451c5b8472b75e1 Mon Sep 17 00:00:00 2001
+From: Benjamin Chausse <benjamin@chausse.xyz>
+Date: Wed, 7 Aug 2024 16:52:21 -0400
+Subject: [PATCH] Implement monchange trigger script
+
+---
+ config.def.h | 3 +++
+ dwl.c        | 8 ++++++--
+ 2 files changed, 9 insertions(+), 2 deletions(-)
+
+diff --git a/config.def.h b/config.def.h
+index 22d2171..10d3563 100644
+--- a/config.def.h
++++ b/config.def.h
+@@ -118,6 +118,9 @@ static const enum libinput_config_tap_button_map button_map = LIBINPUT_CONFIG_TA
+ /* helper for spawning shell commands in the pre dwm-5.0 fashion */
+ #define SHCMD(cmd) { .v = (const char*[]){ "/bin/sh", "-c", cmd, NULL } }
+ 
++/* script that runs whenever the monitor configuration changes */
++static const Arg monchange = SHCMD("makewall");
++
+ /* commands */
+ static const char *termcmd[] = { "foot", NULL };
+ static const char *menucmd[] = { "wmenu-run", NULL };
+diff --git a/dwl.c b/dwl.c
+index a2711f6..d18bed5 100644
+--- a/dwl.c
++++ b/dwl.c
+@@ -752,6 +752,7 @@ closemon(Monitor *m)
+ 	}
+ 	focusclient(focustop(selmon), 1);
+ 	printstatus();
++  spawn(&monchange);
+ }
+ 
+ void
+@@ -1044,10 +1045,13 @@ createmon(struct wl_listener *listener, void *data)
+ 	 * output (such as DPI, scale factor, manufacturer, etc).
+ 	 */
+ 	m->scene_output = wlr_scene_output_create(scene, wlr_output);
+-	if (m->m.x == -1 && m->m.y == -1)
++	if (m->m.x == -1 && m->m.y == -1) {
+ 		wlr_output_layout_add_auto(output_layout, wlr_output);
+-	else
++  } else {
+ 		wlr_output_layout_add(output_layout, wlr_output, m->m.x, m->m.y);
++  }
++
++  spawn(&monchange);
+ }
+ 
+ void
+-- 
+2.45.2
+