config.def.h

@@ -171,9 +171,7 @@ static uint forcemousemod = ShiftMask;
 static MouseShortcut mshortcuts[] = {
 	/* mask                 button   function        argument       release */
 	{ XK_ANY_MOD,           Button2, selpaste,       {.i = 0},      1 },
-	{ ShiftMask,            Button4, ttysend,        {.s = "\033[5;2~"} },
 	{ XK_ANY_MOD,           Button4, ttysend,        {.s = "\031"} },
-	{ ShiftMask,            Button5, ttysend,        {.s = "\033[6;2~"} },
 	{ XK_ANY_MOD,           Button5, ttysend,        {.s = "\005"} },
 };
 

st.c

@@ -1106,17 +1106,27 @@ selscroll(int orig, int n)
 	if (sel.ob.x == -1)
 		return;
 
-	if (BETWEEN(sel.nb.y, orig, term.bot) != BETWEEN(sel.ne.y, orig, term.bot)) {
-		selclear();
-	} else if (BETWEEN(sel.nb.y, orig, term.bot)) {
-		sel.ob.y += n;
-		sel.oe.y += n;
-		if (sel.ob.y < term.top || sel.ob.y > term.bot ||
-		    sel.oe.y < term.top || sel.oe.y > term.bot) {
+	if (BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
+		if ((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
 			selclear();
-		} else {
-			selnormalize();
+			return;
 		}
+		if (sel.type == SEL_RECTANGULAR) {
+			if (sel.ob.y < term.top)
+				sel.ob.y = term.top;
+			if (sel.oe.y > term.bot)
+				sel.oe.y = term.bot;
+		} else {
+			if (sel.ob.y < term.top) {
+				sel.ob.y = term.top;
+				sel.ob.x = 0;
+			}
+			if (sel.oe.y > term.bot) {
+				sel.oe.y = term.bot;
+				sel.oe.x = term.col;
+			}
+		}
+		selnormalize();
 	}
 }
 

st.info

@@ -158,7 +158,6 @@ st-mono| simpleterm monocolor,
 	rc=\E8,
 	rev=\E[7m,
 	ri=\EM,
-	rin=\E[%p1%dT,
 	ritm=\E[23m,
 	rmacs=\E(B,
 	rmcup=\E[?1049l,