<AWT Dev> [10] Review request for 8155197: Focus transition issue

[Dmitry Markov]

Hello,

Could you review a fix for jdk10, please?

  bug: https://bugs.openjdk.java.net/browse/JDK-8155197
  webrev: http://cr.openjdk.java.net/~dmarkov/8155197/webrev.00/

Problem description:
Currently we restore focus synchronously to a component if the window (which contains it) owns the focus. However if another window/dialog is displayed at the same time, the first window loses focus, (i.e. synchronous focus request failed) and the focus target is shifted to the next component in the focus traversal cycle.

Fix:
It is necessary to check the result of synchronous focus request for a component. If the focus request’s failed because the contained window lost focus, we should restore focus to this component next time when its parent window obtains focus.

Testing:
I ran corresponding JCK and regression tests and did not observe any new failures.

Thanks,
Dmitry