fix: start position when first > 1

pkg/math/math.go

@@ -43,7 +43,11 @@ func PagerBox(first, last uint64, pos, count int64) (uint64, int64) {
 	var start uint64
 
 	if pos >= 0 {
-		start = first + uint64(pos)
+		if int64(first) > pos {
+			start = first
+		} else {
+			start = uint64(pos) + 1
+		}
 	} else {
 		start = uint64(int64(last) + pos + 1)
 	}

pkg/math/math_test.go

@@ -76,6 +76,8 @@ func TestPagerBox(t *testing.T) {
 		{1, 10, 10, 10, 0, 0},
 		{1, 10, 0, es.AllEvents, 1, 10},
 		{1, 10, -1, -es.AllEvents, 10, -10},
+
+		{5, 10, 0, 1, 5, 1},
 	}
 
 	for _, tt := range tests {