config, fns, manage: terminal classes in config instead of hardcoded in manage()

config.h

@@ -113,6 +113,7 @@
 /* List of window classes to spawn as sticky;
  * Class values for currently open windows are conveniently shown in the last
  * column of the 'xshove' command given with no arguments.
+ * Can be partial strings.
  * Remember the backslash at the end of non-terminating lines!
  */
 
@@ -122,7 +123,23 @@
   0                \
 }
 
+/* List of terminal window classes -- include your favorite terminal here,
+ * and remove those you don't use. Can be partial strings.
+ * This array is required. Remember the backslash at the end of non-
+ * terminating lines!
+ */
+
+#define TERMINALS {\
+  "term",          \
+  "Term",          \
+  "xvt",           \
+  "Alacritty",     \
+  "onsole",        \
+  0                \
+}
+
 /* List of window classes to REQUIRE window sweeping when spawning;
+ * Can be partial strings.
  * Remember the backslash at the end of non-terminating lines!
  */
 

fns.h

@@ -61,6 +61,7 @@ void setlabel();
 void getproto();
 void gettrans();
 int shouldalwaysdraw(Client* c);
+int isterminalwindow(Client* c);
 
 /* key.c */
 void keypress();

manage.c

@@ -50,9 +50,7 @@ int manage(Client* c, int mapped) {
     c->is9term = 0;
 #endif
     if (isNew) {
-      c->is9term = strstr(c->class, "term") || strstr(c->class, "Term") ||
+      c->is9term = isterminalwindow(c);
-                   strstr(c->class, "urxvt") || strstr(c->class, "URxvt") ||
-                   strstr(c->class, "onsole") || strstr(c->class, "Alacritty");
       isNew = 0;
     }
   } else {
@@ -573,3 +571,16 @@ int shouldalwaysdraw(Client* c) {
     return 0;
 }
 #endif
+
+int isterminalwindow(Client* c) {
+  static char* termnames[] = TERMINALS;
+  char** t = termnames;
+
+  while (*t) {
+    if (c && c->class && strstr(c->class, *t)) {
+      return 1;
+    }
+    ++t;
+  }
+  return 0;
+}