editing arabic script

[Ahmed Mohammed Abdel-Razek]

if i have mixed arabic and english words in the same line the program edit them as the all left to right
so when i select an arabic word it select it right but when i start typing the program type in another place
http://i.imgur.com/sYSfiei.png

if i have only arabic words in a line it will edit it without any problem

[Ahmed Mohammed Abdel-Razek]

I should explain more it edited the line in the right positions but from the wrong side, in mixed Arabic English lines when I won’t to edit an Arabic word it will start writing from the right Col but from the left side not the right one