Add a "second click" key type which is fired for the second click of a

double click, even if the timer hasn't expired to confirm it isn't
actually a triple click. Provides a way for people who don't care about
triple clicks or can make their commands have no side effects to avoid
the double click timer delay.

key-string.c

@@ -100,6 +100,9 @@ static const struct {
 	KEYC_MOUSE_STRING(MOUSEDRAGEND3, MouseDragEnd3),
 	KEYC_MOUSE_STRING(WHEELUP, WheelUp),
 	KEYC_MOUSE_STRING(WHEELDOWN, WheelDown),
+	KEYC_MOUSE_STRING(SECONDCLICK1, SecondClick1),
+	KEYC_MOUSE_STRING(SECONDCLICK2, SecondClick2),
+	KEYC_MOUSE_STRING(SECONDCLICK3, SecondClick3),
 	KEYC_MOUSE_STRING(DOUBLECLICK1, DoubleClick1),
 	KEYC_MOUSE_STRING(DOUBLECLICK2, DoubleClick2),
 	KEYC_MOUSE_STRING(DOUBLECLICK3, DoubleClick3),

server-client.c

@@ -440,6 +440,7 @@ server_client_check_mouse(struct client *c, struct key_event *event)
 	       UP,
 	       DRAG,
 	       WHEEL,
+	       SECOND,
 	       DOUBLE,
 	       TRIPLE } type = NOTYPE;
 	enum { NOWHERE,
@@ -493,9 +494,10 @@ server_client_check_mouse(struct client *c, struct key_event *event)
 			evtimer_del(&c->click_timer);
 			c->flags &= ~CLIENT_DOUBLECLICK;
 			if (m->b == c->click_button) {
-				type = NOTYPE;
+				type = SECOND;
+				x = m->x, y = m->y, b = m->b;
+				log_debug("second-click at %u,%u", x, y);
 				c->flags |= CLIENT_TRIPLECLICK;
-				goto add_timer;
 			}
 		} else if (c->flags & CLIENT_TRIPLECLICK) {
 			evtimer_del(&c->click_timer);
@@ -507,13 +509,12 @@ server_client_check_mouse(struct client *c, struct key_event *event)
 				ignore = 1;
 				goto have_event;
 			}
-		} else
+		} else {
+			type = DOWN;
+			x = m->x, y = m->y, b = m->b;
+			log_debug("down at %u,%u", x, y);
 			c->flags |= CLIENT_DOUBLECLICK;
-
-	add_timer:
-		type = DOWN;
-		x = m->x, y = m->y, b = m->b;
-		log_debug("down at %u,%u", x, y);
+		}
 
 		if (KEYC_CLICK_TIMEOUT != 0) {
 			memcpy(&c->click_event, m, sizeof c->click_event);
@@ -877,6 +878,52 @@ have_event:
 			break;
 		}
 		break;
+	case SECOND:
+		switch (MOUSE_BUTTONS(b)) {
+		case 0:
+			if (where == PANE)
+				key = KEYC_SECONDCLICK1_PANE;
+			if (where == STATUS)
+				key = KEYC_SECONDCLICK1_STATUS;
+			if (where == STATUS_LEFT)
+				key = KEYC_SECONDCLICK1_STATUS_LEFT;
+			if (where == STATUS_RIGHT)
+				key = KEYC_SECONDCLICK1_STATUS_RIGHT;
+			if (where == STATUS_DEFAULT)
+				key = KEYC_SECONDCLICK1_STATUS_DEFAULT;
+			if (where == BORDER)
+				key = KEYC_SECONDCLICK1_BORDER;
+			break;
+		case 1:
+			if (where == PANE)
+				key = KEYC_SECONDCLICK2_PANE;
+			if (where == STATUS)
+				key = KEYC_SECONDCLICK2_STATUS;
+			if (where == STATUS_LEFT)
+				key = KEYC_SECONDCLICK2_STATUS_LEFT;
+			if (where == STATUS_RIGHT)
+				key = KEYC_SECONDCLICK2_STATUS_RIGHT;
+			if (where == STATUS_DEFAULT)
+				key = KEYC_SECONDCLICK2_STATUS_DEFAULT;
+			if (where == BORDER)
+				key = KEYC_SECONDCLICK2_BORDER;
+			break;
+		case 2:
+			if (where == PANE)
+				key = KEYC_SECONDCLICK3_PANE;
+			if (where == STATUS)
+				key = KEYC_SECONDCLICK3_STATUS;
+			if (where == STATUS_LEFT)
+				key = KEYC_SECONDCLICK3_STATUS_LEFT;
+			if (where == STATUS_RIGHT)
+				key = KEYC_SECONDCLICK3_STATUS_RIGHT;
+			if (where == STATUS_DEFAULT)
+				key = KEYC_SECONDCLICK3_STATUS_DEFAULT;
+			if (where == BORDER)
+				key = KEYC_SECONDCLICK3_BORDER;
+			break;
+		}
+		break;
 	case DOUBLE:
 		switch (MOUSE_BUTTONS(b)) {
 		case 0:

tmux.1

@@ -3982,10 +3982,19 @@ The following mouse events are available:
 .It Li "MouseDown1" Ta "MouseUp1" Ta "MouseDrag1" Ta "MouseDragEnd1"
 .It Li "MouseDown2" Ta "MouseUp2" Ta "MouseDrag2" Ta "MouseDragEnd2"
 .It Li "MouseDown3" Ta "MouseUp3" Ta "MouseDrag3" Ta "MouseDragEnd3"
+.It Li "SecondClick1" Ta "SecondClick2" Ta "SecondClick3"
 .It Li "DoubleClick1" Ta "DoubleClick2" Ta "DoubleClick3"
 .It Li "TripleClick1" Ta "TripleClick2" Ta "TripleClick3"
 .El
 .Pp
+The
+.Ql SecondClick
+events are fired for the second click of a double click, even if there may be a
+third click which will fire
+.Ql TripleClick
+instead of
+.Ql DoubleClick .
+.Pp
 Each should be suffixed with a location, for example
 .Ql MouseDown1Status .
 .Pp

tmux.h

@@ -182,6 +182,9 @@ enum {
 	KEYC_MOUSE_KEY(MOUSEDRAGEND3),
 	KEYC_MOUSE_KEY(WHEELUP),
 	KEYC_MOUSE_KEY(WHEELDOWN),
+	KEYC_MOUSE_KEY(SECONDCLICK1),
+	KEYC_MOUSE_KEY(SECONDCLICK2),
+	KEYC_MOUSE_KEY(SECONDCLICK3),
 	KEYC_MOUSE_KEY(DOUBLECLICK1),
 	KEYC_MOUSE_KEY(DOUBLECLICK2),
 	KEYC_MOUSE_KEY(DOUBLECLICK3),