New argument for the rule message: follow

README.md

@@ -173,7 +173,7 @@ The following messages are handled:
 
 - `balance` — Adjust the split ratios so that all windows occupy the same area.
 
-- `rule PATTERN [DESKTOP_NAME] [floating]` — Create a new rule (`PATTERN` must match the class or instance name).
+- `rule PATTERN [DESKTOP_NAME] [floating] [follow]` — Create a new rule (`PATTERN` must match the class or instance name).
 
 - `remove_rule UID ...` — Remove the rules with the given UIDs.
 

bspwm.1

@@ -248,7 +248,7 @@ Flip the window tree.
 .B balance
 Adjust the split ratios so that all windows occupy the same area.
 .TP
-.BI rule " PATTERN [DESKTOP_NAME] [floating]"
+.BI rule " PATTERN [DESKTOP_NAME] [floating] [follow]"
 Create a new rule (PATTERN must match the class or instance name).
 .TP
 .BI remove_rule " UID ..."

messages.c

@@ -367,6 +367,8 @@ void process_message(char *msg, char *rsp)
             while (arg != NULL) {
                 if (strcmp(arg, "floating") == 0) {
                     rule->effect.floating = true;
+                } else if (strcmp(arg, "follow") == 0) {
+                    rule->effect.follow = true;
                 } else {
                     desktop_location_t loc;
                     if (locate_desktop(arg, &loc)) {

rules.c

@@ -60,7 +60,7 @@ bool is_match(rule_t *r, xcb_window_t win)
     return false;
 }
 
-void handle_rules(xcb_window_t win, monitor_t **m, desktop_t **d, bool *floating, bool *transient, bool *fullscreen, bool *takes_focus, bool *manage)
+void handle_rules(xcb_window_t win, monitor_t **m, desktop_t **d, bool *floating, bool *follow, bool *transient, bool *fullscreen, bool *takes_focus, bool *manage)
 {
     xcb_ewmh_get_atoms_reply_t win_type;
 
@@ -113,6 +113,8 @@ void handle_rules(xcb_window_t win, monitor_t **m, desktop_t **d, bool *floating
             rule_effect_t efc = rule->effect;
             if (efc.floating)
                 *floating = true;
+            if (efc.follow)
+                *follow = true;
             if (efc.monitor != NULL && efc.desktop != NULL) {
                 *m = efc.monitor;
                 *d = efc.desktop;
@@ -127,7 +129,7 @@ void list_rules(char *rsp)
     char line[MAXLEN];
 
     for (rule_t *r = rule_head; r != NULL; r = r->next) {
-        snprintf(line, sizeof(line), "%02X %s %s %s\n", r->uid, r->cause.name, (r->effect.desktop != NULL ? r->effect.desktop->name : "\b"), (r->effect.floating ? "floating" : "\b"));
+        snprintf(line, sizeof(line), "%2X %s %s %s %s\n", r->uid, r->cause.name, (r->effect.desktop != NULL ? r->effect.desktop->name : "\b"), (r->effect.floating ? "floating" : "\b"), (r->effect.follow ? "follow" : "\b"));
         strncat(rsp, line, REMLEN(rsp));
     }
 }

rules.h

@@ -6,7 +6,7 @@ void remove_rule(rule_t *);
 void remove_rule_by_uid(unsigned int);
 rule_t *find_rule(unsigned int);
 bool is_match(rule_t *, xcb_window_t);
-void handle_rules(xcb_window_t, monitor_t **, desktop_t **, bool *, bool *, bool *, bool *, bool *);
+void handle_rules(xcb_window_t, monitor_t **, desktop_t **, bool *, bool *, bool *, bool *, bool *, bool *);
 void list_rules(char *);
 
 #endif

types.c

@@ -144,6 +144,7 @@ rule_t *make_rule(void)
     rule_t *r = malloc(sizeof(rule_t));
     r->uid = ++rule_uid;
     r->effect.floating = false;
+    r->effect.follow = false;
     r->effect.monitor = NULL;
     r->effect.desktop = NULL;
     r->prev = NULL;

types.h

@@ -175,6 +175,7 @@ typedef struct {
 
 typedef struct {
     bool floating;
+    bool follow;
     monitor_t *monitor;
     desktop_t *desktop;
 } rule_effect_t;

window.c

@@ -96,9 +96,9 @@ void manage_window(monitor_t *m, desktop_t *d, xcb_window_t win)
     if (override_redirect || locate_window(win, &loc))
         return;
 
-    bool floating = false, transient = false, fullscreen = false, takes_focus = true, manage = true;
+    bool floating = false, follow = false, transient = false, fullscreen = false, takes_focus = true, manage = true;
 
-    handle_rules(win, &m, &d, &floating, &transient, &fullscreen, &takes_focus, &manage);
+    handle_rules(win, &m, &d, &floating, &follow, &transient, &fullscreen, &takes_focus, &manage);
 
     if (!manage) {
         disable_shadow(win);
@@ -162,6 +162,11 @@ void manage_window(monitor_t *m, desktop_t *d, xcb_window_t win)
     uint32_t values[] = {(focus_follows_pointer ? CLIENT_EVENT_MASK_FFP : CLIENT_EVENT_MASK)};
     xcb_change_window_attributes(dpy, c->window, XCB_CW_EVENT_MASK, values);
 
+    if (follow) {
+        select_monitor(m);
+        select_desktop(d);
+    }
+
     num_clients++;
     ewmh_set_wm_desktop(birth, d);
     ewmh_update_client_list();