How can you distinguish between "topic," "focalized," or just vanilla subjects?

How do you differentiate phrases which are topics, focalized, or just plain subjects? What tests can you use?

I am looking at the data below– the capitalized Hawaiian phrases have been claimed to be focalized (emphasized).

• (1) KE HĀ’AWI AKU NEI au I kēia iā’oe.

• PRES give away PRES 1s ACC this to you

• ‘I give this to you.’

• (2) ‘O WAU ke hā’awi aku nei i kēia iā’oe.

• ‘I give this to you.’

• (3) ‘O ‘OE ka mea a’u e hā’awi aku nei i kēia.

• ‘I give this to you.’

• (4) ‘O KĒIA ka’u e hā’awi aku nei iā’oe.

• ‘I give this to you.’

Please send help. I am looking for how to distinguish (in general) between "topic," "focalized," or just vanilla subjects.