Merge "Allow Task#setDragResizing on W_M_MULTI_WINDOW" into main

services/core/java/com/android/server/wm/Task.java

@@ -2909,7 +2909,7 @@ class Task extends TaskFragment {
         if (mDragResizing != dragResizing) {
             // No need to check if allowed if it's leaving dragResize
             if (dragResizing
-                    && !(getRootTask().getWindowingMode() == WINDOWING_MODE_FREEFORM)) {
+                    && !(getRootTask().getWindowConfiguration().canResizeTask())) {
                 Slog.e(TAG, "Drag resize isn't allowed for root task id=" + getRootTaskId());
                 return;
             }

services/tests/wmtests/src/com/android/server/wm/TaskTests.java

@@ -1583,6 +1583,35 @@ public class TaskTests extends WindowTestsBase {
                 task.getTopChild());
     }
 
+    @Test
+    public void testSetDragResizing() {
+        final Task task = createTask(mDisplayContent);
+
+        // Allowed for freeform.
+        task.setWindowingMode(WINDOWING_MODE_FREEFORM);
+
+        task.setDragResizing(true);
+        assertTrue(task.isDragResizing());
+        task.setDragResizing(false);
+        assertFalse(task.isDragResizing());
+
+        // Allowed for multi-window.
+        task.setWindowingMode(WINDOWING_MODE_MULTI_WINDOW);
+
+        task.setDragResizing(true);
+        assertTrue(task.isDragResizing());
+        task.setDragResizing(false);
+        assertFalse(task.isDragResizing());
+
+        // Disallowed for fullscreen.
+        task.setWindowingMode(WINDOWING_MODE_FULLSCREEN);
+
+        task.setDragResizing(true);
+        assertFalse(task.isDragResizing());
+        task.setDragResizing(false);
+        assertFalse(task.isDragResizing());
+    }
+
     private Task getTestTask() {
         return new TaskBuilder(mSupervisor).setCreateActivity(true).build();
     }