RFR: 8280994: [XWayland] Drag and Drop does not work in java -> wayland app direction [v2]

[Alexander Zvegintsev]

On Mon, 5 Jun 2023 06:50:01 GMT, Prasanta Sadhukhan <psadhukhan at openjdk.org> wrote:

>> Not sure what is the purpose of `win != 0 && isXWaylandDndAwareWindow()`, it'll change the behavior for the  X11 session(isXWaylandDndAwareWindow is always false in this case).
>> 
>> `findClientWindow` is a recursive function, and the `isXWaylandDndAwareWindow` check is already performed within the call from line 442.
>
> Yes, since it's a recursive function, I was just trying to understand if `isXWaylandDndAwareWindow `is called at right place
> I tried a simple recursive program similar to `findClientWindow `which gives StackOverflowError so I was thinking if `findClientWindow  `can also give SOF and whether we should call `isXWaylandDndAwareWindow ` at l446 or l439
> 
> 
> public class Recursion {
>     public static void main(String[] args) {
>         long value = 22;
>         System.out.println(test(value));
>     }
> 
>     private static long test(long value) {
>         long arr[] = {1L,2L,3L};
>         for (long i : arr) {
>             long val = test(i);
>             if (val != 0) {
>                 System.out.println("val " + val);
>                 return val;
>             }
>         }
>         if (getValue(value) == 22) {
>             return value;
>         }
>         return 0;
>     }
>     private static long getValue(long value) {
>         return value;
>     }
> }

Yes, this could happen if the implementation changes, currently the dummy window has no children.

Updated.

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/14266#discussion_r1217973252