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From 7fed9449575b1e4f58d519d2f87b7e66e2056125 Mon Sep 17 00:00:00 2001
From: wochap <gean.marroquin@gmail.com>
Date: Thu, 11 Apr 2024 12:45:47 -0500
Subject: [PATCH] implement regex support in rules for app_id and title Enables
 the use of regular expressions for window rules "app_id" and "title"

---
 config.def.h |  1 +
 dwl.c        | 19 +++++++++++++++++--
 2 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/config.def.h b/config.def.h
index 8847e58..89f5b60 100644
--- a/config.def.h
+++ b/config.def.h
@@ -25,6 +25,7 @@ static const Rule rules[] = {
 	/* examples: */
 	{ "Gimp_EXAMPLE",     NULL,       0,            1,           -1 }, /* Start on currently visible tags floating, not tiled */
 	{ "firefox_EXAMPLE",  NULL,       1 << 8,       0,           -1 }, /* Start on ONLY tag "9" */
+	{ "^kitty_EXAMPLE$",  NULL,       0,            0,           -1 },
 };
 
 /* layout(s) */
diff --git a/dwl.c b/dwl.c
index bf763df..fc185af 100644
--- a/dwl.c
+++ b/dwl.c
@@ -10,6 +10,7 @@
 #include <sys/wait.h>
 #include <time.h>
 #include <unistd.h>
+#include <regex.h>
 #include <wayland-server-core.h>
 #include <wlr/backend.h>
 #include <wlr/backend/libinput.h>
@@ -347,6 +348,7 @@ static Monitor *xytomon(double x, double y);
 static void xytonode(double x, double y, struct wlr_surface **psurface,
 		Client **pc, LayerSurface **pl, double *nx, double *ny);
 static void zoom(const Arg *arg);
+static int regex_match(const char *pattern, const char *str);
 
 /* variables */
 static const char broken[] = "broken";
@@ -459,8 +461,8 @@ applyrules(Client *c)
 		title = broken;
 
 	for (r = rules; r < END(rules); r++) {
-		if ((!r->title || strstr(title, r->title))
-				&& (!r->id || strstr(appid, r->id))) {
+		if ((!r->title || regex_match(r->title, title))
+				&& (!r->id || regex_match(r->id, appid))) {
 			c->isfloating = r->isfloating;
 			newtags |= r->tags;
 			i = 0;
@@ -2929,6 +2931,19 @@ zoom(const Arg *arg)
 	arrange(selmon);
 }
 
+int
+regex_match(const char *pattern, const char *str) {
+  regex_t regex;
+  int reti;
+  if (regcomp(&regex, pattern, REG_EXTENDED) != 0)
+    return 0;
+  reti = regexec(&regex, str, (size_t)0, NULL, 0);
+  regfree(&regex);
+  if (reti == 0)
+    return 1;
+  return 0;
+}
+
 #ifdef XWAYLAND
 void
 activatex11(struct wl_listener *listener, void *data)
-- 
2.43.2