bug#7282: 23.2; [PATCH] Improve text composition by Input Methods on MacOSX.

[YAMAMOTO Mitsuharu]

>>>>> On Tue, 26 Oct 2010 21:20:13 +0900, Keitaro Miyazaki 
>>>>> <keitaro.miyazaki@gmail.com> said:

> It is quite difficult to compose "input text" of language such as
> Japanese by Input Methods like "Kotoeri" on MacOSX, because emacs
> does not show clause boundary of the "input text".

> I made an attached patch which improves text composition by making a
> highlight on active clause of the "input text".

The members in `selRange' are in UTF-16 indices.  So they are not
necessarily coincide with character indices when the marked text
contains non-BMP characters.

                                     YAMAMOTO Mitsuharu
                                mituharu@math.s.chiba-u.ac.jp