Removing Sayura (phonetic) input method and installing wijesekara sinhala layout for ibus and input

I’m from srilanka and a long term opensuse user. I need to use wijesekara (m17n) input method to type in sinhala. former versions of opensuse provided the wijesekara layout as input method. but now it gives sayura sinhala input method which runs as phonetic. most of the srilankans knows how to use sinhala type writer with wijesekara layout. but, today I installed opensuse 13.1 and found that wijesekara layout is not there. iBus shows the wijesekara layout but it doesn’t work and the " input method" only provides the phonetic input methods.
does anyone can help me to install wijesekara layout on my opensuse 13.1?

Removed sayura by suing software manager YaST GUI and opened iBus preferences. it showed to add

export GTK_IM_MODULE=ibus
export XMODIFIERS=@im=ibus
export QT_IM_MODULE=ibus

to $HOME/.bashrc

but I found that .bashrc is inside the /etc folder.

so I switched in to root on the Dolphin and added that above code in to end of the bashrc file and re-logged. it worked me.