RFR: 8354943: [Linux] Simplify and update glass gtk backend: window sizing, positioning, and state management issues [v5]

[Thiago Milczarek Sayao]

On Wed, 23 Apr 2025 19:48:52 GMT, Martin Fox <mfox at openjdk.org> wrote:

>> Thiago Milczarek Sayao has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Reenable RestoreSceneSizeTest (JDK-8353556)
>
> tests/system/src/test/java/test/javafx/stage/FullScreenTest.java line 123:
> 
>> 121:             mode = EnumSource.Mode.INCLUDE,
>> 122:             names = {"DECORATED", "UNDECORATED", "TRANSPARENT"})
>> 123:     void testUnFullScreenChangedSize(StageStyle stageStyle) {
> 
> According to the spec changes to the size or position of a window while it's in fullscreen mode will be ignored and applied after the window leaves fullscreen mode. That's not how it currently works on macOS or Windows 11. Actually implementing that part of the spec would be complicated and probably not worth the development cycles. I would rather remove that wording and drop the testUnFullScreenChangeSize and Position tests.
> 
> I imagine this was easy to implement back when fullscreen was implemented as a separate window. It's not clear this is useful behavior, the spec might just have captured an implementation detail and elevated it to a feature.

I was kind of on the fence with this one. Maybe it’s a case where the docs in Stage.java need fixing — they do also say that width and height should reflect the unfullscreened size. But there are several tests that check the fullscreen size against the screen size, so I opted for notifying the fullscreen sizes.

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PR Review Comment: https://git.openjdk.org/jfx/pull/1789#discussion_r2059342932