From c5333e44d94f9d3cf439ac7e257d64f3f3014cfb Mon Sep 17 00:00:00 2001
From: Rutherther <rutherther@ditigal.xyz>
Date: Sun, 21 Dec 2025 16:19:15 +0100
Subject: [PATCH] Allow applying custom logic applycustomrules

I will use this for custom rules for opening programs just the first
time or putting them to a specific tag when opened second time and so on.
---
 config.def.h |  6 ++++++
 dwl.c        | 38 +++++++++++++++++++++++++-------------
 2 files changed, 31 insertions(+), 13 deletions(-)

diff --git a/config.def.h b/config.def.h
index 63005316c28ccb0119d8daf1aa85fdbc4344d161..ffc55be04dbba89fa78c8700cce5ac5dc8e207c9 100644
--- a/config.def.h
+++ b/config.def.h
@@ -217,3 +217,9 @@ static const Button buttons[] = {
 	{ MODKEY, BTN_MIDDLE, togglefloating, {0} },
 	{ MODKEY, BTN_RIGHT,  moveresize,     {.ui = CurResize} },
 };
+
+bool applycustomrules(const char *appid, const char *title, Rule *r)
+{
+  // TODO: apply any rules you wish
+  return false;
+}
diff --git a/dwl.c b/dwl.c
index cef9b8a469dde502d68769e31bb8089eb7c8ff91..ad242068b633e75fec9696f128e96b1c2e2184a1 100644
--- a/dwl.c
+++ b/dwl.c
@@ -261,7 +261,7 @@ typedef struct {
 	int noswallow;
 	int allow_activation;
 	int monitor;
-	const char scratchkey;
+	char scratchkey;
 } Rule;
 
 typedef struct {
@@ -585,7 +585,7 @@ applyrules(Client *c)
 	const char *appid, *title;
 	uint32_t newtags = 0;
 	int i;
-	const Rule *r;
+	Rule *r;
 	Monitor *mon = selmon, *m;
 
 	c->scratchkey = 0;
@@ -594,23 +594,35 @@ applyrules(Client *c)
 
 	c->pid = client_get_pid(c);
 
+  void
+  applyrule(const Rule *r)
+  {
+    c->isfloating = r->isfloating;
+    c->isterm     = r->isterm;
+    c->noswallow  = r->noswallow;
+    c->scratchkey = r->scratchkey;
+    c->allow_activation = r->allow_activation;
+    newtags |= r->tags;
+    i = 0;
+    wl_list_for_each(m, &mons, link) {
+      if (r->monitor == i++)
+        mon = m;
+    }
+  }
+
 	for (r = rules; r < END(rules); r++) {
 		if ((!r->title || strstr(title, r->title))
 				&& (!r->id || strstr(appid, r->id))) {
-			c->isfloating = r->isfloating;
-			c->isterm     = r->isterm;
-			c->noswallow  = r->noswallow;
-			c->scratchkey = r->scratchkey;
-			c->allow_activation = r->allow_activation;
-			newtags |= r->tags;
-			i = 0;
-			wl_list_for_each(m, &mons, link) {
-				if (r->monitor == i++)
-					mon = m;
-			}
+      applyrule(r);
 		}
 	}
 
+  // Reset the rule.
+  Rule rule = (Rule) { NULL, NULL, 0, 0, 0, 0, -1, 0 };
+  if (applycustomrules(appid, title, &rule)) {
+    applyrule(&rule);
+  }
+
 	wl_list_for_each(m, &mons, link) {
 		// tag with different monitor selected by rules
 		if (m->tagset[m->seltags] & newtags) {