From 3ae5cd4ff7b2cc73bd2c0ebb25d6afcde64e8e6d Mon Sep 17 00:00:00 2001
From: wochap <gean.marroquin@gmail.com>
Date: Tue, 5 Mar 2024 23:56:23 -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 db0babc..ff23b6f 100644
--- a/config.def.h
+++ b/config.def.h
@@ -25,6 +25,7 @@ static const Rule rules[] = {
 	{ "Gimp",     NULL,       0,            1,           -1 },
 	*/
 	{ "firefox",  NULL,       1 << 8,       0,           -1 },
+	{ "^kitty$",  NULL,       0,            0,           -1 },
 };
 
 /* layout(s) */
diff --git a/dwl.c b/dwl.c
index ef27a1d..df29577 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>
@@ -327,6 +328,7 @@ 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";
@@ -430,8 +432,8 @@ 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;
@@ -2746,6 +2748,19 @@ 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)
-- 
2.42.0