Add autoscroll

src/main/java/de/zonlykroks/advancedscripts/screen/ScriptEditScreen.java

@@ -332,6 +332,7 @@ public class ScriptEditScreen extends Screen {
             savedCursorY = -1;
             savedCursorX = -1;
         }
+        autoScroll();
     }
 
     @Override
@@ -360,6 +361,7 @@ public class ScriptEditScreen extends Screen {
         boolean valid = insert(chr + "");
         savedCursorY = -1;
         savedCursorX = -1;
+        autoScroll();
         return valid;
     }
 
@@ -540,6 +542,14 @@ public class ScriptEditScreen extends Screen {
         return true;
     }
 
+    private void autoScroll() {
+        if (cursorY < scroll) {
+            scroll = cursorY;
+        } else if (cursorY >= scroll + ((this.height - 25 - 66) / 9)) {
+            scroll = cursorY - ((this.height - 25 - 66) / 9);
+        }
+    }
+
     private boolean isAtEndOfLine() {
         return cursorX == lines.get(cursorY).length();
     }