From 3398d028c61165c219bf9361f5b81d3a54e968c8 Mon Sep 17 00:00:00 2001
From: Mitchell Riedstra <mitch@riedstra.dev>
Date: Wed, 28 Dec 2022 00:27:22 -0500
Subject: Use regular expressions for tagging windows by class and name

---
 .gitignore |  3 +++
 config.h   | 24 ++++++++++++------------
 dwm.c      |  6 +++---
 util2.c    | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 util2.h    | 24 ------------------------
 5 files changed, 71 insertions(+), 39 deletions(-)
 create mode 100644 .gitignore
 create mode 100644 util2.c
 delete mode 100644 util2.h

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..80baf9b
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+*.o
+tags
+dwm
diff --git a/config.h b/config.h
index abeeaee..f0c2cc7 100644
--- a/config.h
+++ b/config.h
@@ -37,18 +37,18 @@ static const Rule rules[] = {
 	 *	WM_NAME(STRING) = title
 	 */
 	/* class            instance    title       tags mask     isfloating   monitor */
-	{  "St",             NULL,      NULL,       1<<0,         0,           -1  },
-	{  "Gimp",           NULL,      NULL,       1<<2,         0,           -1  },
-	{  "Pavucontrol",    NULL,      NULL,       1<<6,         0,           -1  },
-	{  "Blueman-manager",NULL,      NULL,       1<<6,         0,           -1  },
-	{  "Claws-mail",     NULL,      NULL,       1<<7,         0,           -1  },
-	{  "Evolution",      NULL,      NULL,       1<<7,         0,           -1  },
-	{  "Zotero",         NULL,      NULL,       1<<7,         0,           -1  },
-	{  "Google-chrome",  NULL,      NULL,       1<<8,         0,           -1  },
-	{  "Chromium",       NULL,      NULL,       1<<8,         0,           -1  },
-	{  "Firefox",        NULL,      NULL,       1<<8,         0,           -1  },
-	{  "firefox",        NULL,      NULL,       1<<8,         0,           -1  },
-	{  "code-oss",       NULL,      NULL,       1<<1,         0,           -1  },
+	{  "^St$",             NULL,      NULL,       1<<0,         0,           -1  },
+	{  "^Gimp$",           NULL,      NULL,       1<<2,         0,           -1  },
+	{  "^Pavucontrol$",    NULL,      NULL,       1<<6,         0,           -1  },
+	{  "^Blueman-manager$",NULL,      NULL,       1<<6,         0,           -1  },
+	{  "^Claws-mail$",     NULL,      NULL,       1<<7,         0,           -1  },
+	{  "^Evolution$",      NULL,      NULL,       1<<7,         0,           -1  },
+	{  "^Zotero$",         NULL,      NULL,       1<<7,         0,           -1  },
+	{  "^Google-chrome$",  NULL,      NULL,       1<<8,         0,           -1  },
+	{  "^Chromium$",       NULL,      NULL,       1<<8,         0,           -1  },
+	{  "^Firefox$",        NULL,      NULL,       1<<8,         0,           -1  },
+	{  "^code-oss$",       NULL,      NULL,       1<<1,         0,           -1  },
+	{  "^jetbrains.*$",    NULL,      NULL,       1<<2,         0,           -1  },
 };
 
 /* layout(s) */
diff --git a/dwm.c b/dwm.c
index ee4137f..67955f6 100644
--- a/dwm.c
+++ b/dwm.c
@@ -43,7 +43,7 @@
 
 #include "drw.h"
 #include "util.h"
-#include "util2.h"
+#include "util2.c"
 
 /* macros */
 #define BUTTONMASK              (ButtonPressMask|ButtonReleaseMask)
@@ -298,8 +298,8 @@ applyrules(Client *c)
 
 	for (i = 0; i < LENGTH(rules); i++) {
 		r = &rules[i];
-		if ((!r->title || strstr(c->name, r->title))
-		&& (!r->class || strstr(class, r->class))
+		if ((!r->title || reMatch(r->title, c->name) == 0)
+		&& (!r->class || reMatch(r->class, class) == 0)
 		&& (!r->instance || strstr(instance, r->instance)))
 		{
 			c->isfloating = r->isfloating;
diff --git a/util2.c b/util2.c
new file mode 100644
index 0000000..1ce2c55
--- /dev/null
+++ b/util2.c
@@ -0,0 +1,53 @@
+#include <stdio.h>
+#include <fcntl.h>
+#include <err.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <regex.h>
+
+int
+readEnv(FILE *fh)
+{
+	int ret;
+	char name[1024], value[8192];
+
+	while (1) {
+		if ((ret = fscanf(fh, "%1023[^=]=%8191[^\n]\n", &name, &value)) == EOF)
+			break;
+		else if (ret == 0)
+			break;
+
+		fprintf(stderr, "Setting: '%s' = '%s'\n", name, value);
+		setenv(name, value, 1);
+	}
+
+	return 0;
+}
+
+int
+reMatch(const char *regex, const char *str) {
+    char reErr[1024] = {0};
+    regex_t *re = calloc(1, sizeof(regex_t));
+    int rc = 0;
+
+    if (!re)
+        return -1;
+
+    rc = regcomp(re, regex, REG_EXTENDED|REG_ICASE|REG_NOSUB);
+    if (rc != 0) {
+        regerror(rc, re, reErr, 1024);
+        fprintf(stderr, "Regex compile err: %s %s\n", regex, reErr);
+        return -1;
+    }
+
+    rc = regexec(re, str, 0, NULL, 0);
+    regfree(re);
+    if (rc != 0) {
+        regerror(rc, re, reErr, 1024);
+        fprintf(stderr, "Regex match error: %s -> %s : %s\n",
+                regex, str, reErr);
+        return -1;
+    }
+
+    return rc;
+}
diff --git a/util2.h b/util2.h
deleted file mode 100644
index ab25acf..0000000
--- a/util2.h
+++ /dev/null
@@ -1,24 +0,0 @@
-#include <stdio.h>
-#include <fcntl.h>
-#include <err.h>
-#include <unistd.h>
-#include <stdlib.h>
-
-int
-readEnv(FILE *fh)
-{
-	int ret;
-	char name[1024], value[8192];
-
-	while (1) {
-		if ((ret = fscanf(fh, "%1023[^=]=%8191[^\n]\n", &name, &value)) == EOF)
-			break;
-		else if (ret == 0)
-			break;
-
-		fprintf(stderr, "Setting: '%s' = '%s'\n", name, value);
-		setenv(name, value, 1);
-	}
-
-	return 0;
-}
-- 
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