Use addMoveToFullscreenChanges on fullscreen launch.

When a desktop is minimized and a task contained inside it is then
launched in fullscreen, the windowing mode is always set to
WINDOWING_MODE_FULLSCREEN. However, when the display windowing is
fullscreen, the task should be set to WINDOWING_MODE_UNDEFINED to
prevent issues with future split screen transitions (see
ag/23624076 for more details).

This is already done for other freeform -> fullscreen transitions, this
CL just applies the logic to task launches.

Bug: 372809656
Test: Manual
Flag: EXEMPT bugfix
Change-Id: Ib05f7b9912d3cc3b834b9e3217a56337de3c163d

1 files changed, 7 insertions, 0 deletions

diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/desktopmode/DesktopTasksController.kt b/libs/WindowManager/Shell/src/com/android/wm/shell/desktopmode/DesktopTasksController.kt
index 223038f84418..7112de33a180 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/desktopmode/DesktopTasksController.kt
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/desktopmode/DesktopTasksController.kt
@@ -1603,6 +1603,13 @@ class DesktopTasksController(
                     transition, wct, task.displayId
                 )
             }
+        } else if (taskRepository.isActiveTask(task.taskId)) {
+            // If a freeform task receives a request for a fullscreen launch, apply the same
+            // changes we do for similar transitions. The task not having WINDOWING_MODE_UNDEFINED
+            // set when needed can interfere with future split / multi-instance transitions.
+            return WindowContainerTransaction().also { wct ->
+                addMoveToFullscreenChanges(wct, task)
+            }
         }
         return null
     }