RFR: 8348095: [Linux] Menu shows up in wrong position when using i3 windows manager in full screen mode

[Jose Pereda]

On Sun, 9 Feb 2025 19:10:49 GMT, Thiago Milczarek Sayao <tsayao at openjdk.org> wrote:

> The issue was with the view's position, specifically the content's X and Y coordinates relative to the window, including its decorations. When in fullscreen mode, the window remains decorated, but the decorations are hidden. As a result, the content's position needs to be recalculated to account for the window's adjusted layout.
> 
> It's not specific to i3.
> 
> I used `gdk_window_get_root_origin`   because GTK will try harder to find the value, even if `_NET_FRAME_EXTENTS` is not supported on some Window Manager.

I've tested successfully on Ubuntu, with or without i3 wm, and Fedora+Sway. 
It looks good, but I had to add some debug info myself for better understanding of the changes... so that's why I left one remark.

modules/javafx.graphics/src/main/native-glass/gtk/glass_window.cpp line 983:

> 981:     geometry.y = root_y;
> 982:     geometry.view_x = origin_x - root_x;
> 983:     geometry.view_y = origin_y - root_y;

Looks good, but maybe you could add a small comment about what `x/y` and `view_x/view_y` mean?

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PR Review: https://git.openjdk.org/jfx/pull/1702#pullrequestreview-2608366331
PR Review Comment: https://git.openjdk.org/jfx/pull/1702#discussion_r1950635001