RFR: 8241192: [macosx] Wrong letter typed after ´ symbol when using Finnish layout

[Dmitry Markov]

On Fri, 28 Jan 2022 09:38:35 GMT, Prasanta Sadhukhan <psadhukhan at openjdk.org> wrote:

> If we press " ´ " (on U.S. keyboard layout it is the [+] button just before the [delete] button), and then press "s" , 2 "´" characters are entered in a text field instead of "´s" with "Finish" keyboard layout.
> This is because, although " ´ " is construed as "complex" char and inserted properly the next "s" character is treated as non-complex character as it's utf8Length is 1 and utf16Length is 2, so we need to explicitly make it a "complex" char sequence if the code point is 0x73 ie "s" in Finnish layout for it to be inserted properly.

It seems we fail to detect accented symbols at least for “Finish” keyboard layout (other layouts might be affected too). 
I would expect that the function `keyDown()` will set `fProcessingKeystroke` flag to `NO` and then `insertText()` will do the rest but it does not work and requires investigation.

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PR: https://git.openjdk.java.net/jdk/pull/7262