12. The text display control method according to claim 8 , further comprising: changing, using a text size changing unit, a size of the text, wherein, each time the text size changing unit changes the size of the text, the newline insertion unit deletes a previously inserted newline character from the text displayed in the text display area, and wherein processes performed by the text determination unit, the space selection unit, the partial text determination unit, the newline insertion unit, and the display control unit are performed again on the text from which the newline insertion unit has deleted the newline character.
12. The text display control method according to claim 8 , further comprising: changing, using a text size changing unit, a size of the text, wherein, each time the text size changing unit changes the size of the text, the newline insertion unit deletes a previously inserted newline character from the text displayed in the text display area, and wherein processes performed by the text determination unit, the space selection unit, the partial text determination unit, the newline insertion unit, and the display control unit are performed again on the text from which the newline insertion unit has deleted the newline character. 13. The text display control method according to claim 12 , further comprising: each time the text size changing unit changes the size of the text, associating, using a newline position storage unit, a new size of the text and a position at which the newline insertion unit has inserted a newline character into the text displayed in the text display area with the new size with each other and storing the new size and position, wherein, if the text size changing unit changes the size of the text and a position of a newline character corresponding to a new size of the text is stored in the newline position storage unit, the newline insertion unit inserts a newline character into the text displayed in the text display area with the new size at the position of a newline character corresponding to the new size of the text stored in the newline position storage unit.