8236753: Animations do not play backwards after being stopped

Reviewed-by: kcr, arapte

Author: nlisker

modules/javafx.graphics/src/main/java/javafx/animation/Animation.java

@@ -256,7 +256,7 @@ private void set(T value) {
     /* Package-private for testing purposes */
     ClipEnvelope clipEnvelope;
 
-    private boolean lastPlayedFinished = false;
+    private boolean lastPlayedFinished = true;
 
     private boolean lastPlayedForward = true;
     /**
@@ -978,6 +978,7 @@ public void stop() {
             clipEnvelope.abortCurrentPulse();
             doStop();
             jumpTo(Duration.ZERO);
+            lastPlayedFinished = true;
         }
     }
 

modules/javafx.graphics/src/test/java/test/javafx/animation/AnimationTest.java

@@ -322,10 +322,19 @@ public void testPlay() {
         assertFalse(listener.wasCalled);
         assertFalse(timer.containsPulseReceiver(animation.shim_pulseReceiver()));
         animation.stop();
-        animation.setRate(1.0);
+
+        // stopped timeline, rate = -1
+        listener.wasCalled = false;
+        animation.setRate(-1.0);
+        animation.play();
+        assertEquals(ONE_SEC.toMillis(), animation.getCurrentTime().toMillis(), EPSILON);
+        assertFalse(listener.wasCalled);
+        assertTrue(timer.containsPulseReceiver(animation.shim_pulseReceiver()));
+        animation.stop();
 
         // stopped timeline, cycleDuration = 0
         listener.wasCalled = false;
+        animation.setRate(1.0);
         animation.shim_setCycleDuration(Duration.ZERO);
         animation.play();
         assertEquals(Status.STOPPED, animation.getStatus());

modules/javafx.graphics/src/test/java/test/javafx/animation/SequentialTransitionPlayTest.java

@@ -637,10 +637,10 @@ public void testCycleReverse() {
         st.play();
 
         assertEquals(Status.RUNNING, st.getStatus());
-        assertEquals(Status.RUNNING, child1X.getStatus());
-        assertEquals(Status.STOPPED, child1Y.getStatus());
-        assertEquals(0, xProperty.get());
-        assertEquals(0, yProperty.get());
+        assertEquals(Status.STOPPED, child1X.getStatus());
+        assertEquals(Status.RUNNING, child1Y.getStatus());
+        assertEquals(60000, xProperty.get());
+        assertTrue(0 < yProperty.get() && yProperty.get() < 10000);
 
         st.jumpTo(TickCalculation.toDuration(100));