fixed message cursor positions

util/distancebetweenpoints.h

@@ -0,0 +1,22 @@
+#ifndef DISTANCEBETWEENPOINTS_H
+#define DISTANCEBETWEENPOINTS_H
+
+#include <math.h>
+
+namespace chatterino {
+namespace util {
+
+static float distanceBetweenPoints(const QPointF &p1, const QPointF &p2)
+{
+    QPointF tmp = p1 - p2;
+
+    float distance = 0.f;
+    distance += tmp.x() * tmp.x();
+    distance += tmp.y() * tmp.y();
+
+    return sqrt(distance);
+}
+}
+}
+
+#endif  // DISTANCEBETWEENPOINTS_H