RFR: 8221261: deadlock of CInputMethod.characterIndexForPoint and webkit.InputMethodClientImpl.getLocationOffset

[Kevin Rushforth]

On Fri, 22 Dec 2023 11:27:00 GMT, Johannes Bechberger <jbechberger at openjdk.org> wrote:

> A dead-lock is caused by the interaction of MacOS, the AWTEventQueue and JavaFX when the users pressed the Caps Lock key while the AWTEventQueue is processing another event (more on this in the issue). The bug depends on the specific timing of the event sending and can apparently be prevented by finishing all incoming OS events directly while the LWCToolkit.invokeAndWait method is executed.
> 
> This fix is tested and fixes the issue.
> 
> I attached a small
> [reproducer](https://github.com/openjdk/jdk/files/13751865/Archive.zip), just run it with `mvn install package javafx:run`.

We were able to fix this entirely in JavaFX via openjdk/jfx#1327 , which is now integrated.

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PR Comment: https://git.openjdk.org/jdk/pull/17184#issuecomment-1892435484