allow scrolling with mousewheel

config.h

@@ -200,10 +200,8 @@ 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, kscrollup,      {.i = 3}         }, /* You can increase .i to increase scroll speed*/
-	{ XK_ANY_MOD,           Button4, ttysend,        {.s = "\031"} },
+	{ XK_ANY_MOD,           Button5, kscrolldown,    {.i = 3}         },
-	{ ShiftMask,            Button5, ttysend,        {.s = "\033[6;2~"} },
-	{ XK_ANY_MOD,           Button5, ttysend,        {.s = "\005"} },
 };
 
 /* Internal keyboard shortcuts. */

st.c

@@ -1056,6 +1056,12 @@ tnew(int col, int row)
 	treset();
 }
 
+int
+tisaltscr(void)
+{
+	return IS_SET(MODE_ALTSCREEN);
+}
+
 void
 tswapscreen(void)
 {

st.h

@@ -95,6 +95,7 @@ void sendbreak(const Arg *);
 void toggleprinter(const Arg *);
 
 int tattrset(int);
+int tisaltscr(void);
 void tnew(int, int);
 void tresize(int, int);
 void tsetdirtattr(int);

x.c

@@ -35,6 +35,7 @@ typedef struct {
 	void (*func)(const Arg *);
 	const Arg arg;
 	uint  release;
+    int  altscrn;  /* 0: don't care, -1: not alt screen, 1: alt screen */
 } MouseShortcut;
 
 typedef struct {
@@ -473,6 +474,7 @@ mouseaction(XEvent *e, uint release)
 	for (ms = mshortcuts; ms < mshortcuts + LEN(mshortcuts); ms++) {
 		if (ms->release == release &&
 		    ms->button == e->xbutton.button &&
+            (!ms->altscrn || (ms->altscrn == (tisaltscr() ? 1 : -1))) &&
 		    (match(ms->mod, state) ||  /* exact or forced */
 		     match(ms->mod, state & ~forcemousemod))) {
 			ms->func(&(ms->arg));