RFR: 8359108: Mac - When Swing starts First, native application menu doesn't work for JavaFX [v2]

[Pabulaner IV]

On Sun, 31 Aug 2025 07:03:40 GMT, Pabulaner IV <duke at openjdk.org> wrote:

>> This pull request fixes the system menu bar on Mac when combining windows of Swing and JavaFX.
>> 
>> The first issue was to get the native menu bar working simultaneously on Swing and JavaFX, which was done by just returning always true inside the supportsSystemMenu method.
>> 
>> The second issue was to remove all system menu items installed by a swing window. This was fixed by checking the system menu bar every time an item is inserted or removed and removing all menu items that are not owned by JavaFX. This check is done on every insert and remove as JavaFX does not have a clear method inside the MenuBarDelegate class that could be called every time the window gets the focus.
>> 
>> I tested the fix with two Swing and two JavaFX windows that are run inside the same application and it worked without any errors, but on further testing I noticed some issues with the menu bar. I am currently writing the test and fixes for it.
>> 
>> Co-Author: @FlorianKirmaier
>
> Pabulaner IV has refreshed the contents of this pull request, and previous commits have been removed. The incremental views will show differences compared to the previous content of the PR. The pull request contains one new commit since the last revision:
> 
>   8359108: Mac - When Swing starts First, native application menu doesn't work for JavaFX

I have now added 3 test cases to show that the change works as expected:

- one test for a single window
- one test for multiple windows
- one test for enabling / disabling the system menu on a JFX window while the application is running

I used osascript for the tests to get back the native menus of the currently active application.

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PR Comment: https://git.openjdk.org/jfx/pull/1835#issuecomment-3239839961