Fix drag and drop may stuck in multi touch
Currently, we only check the motion entry if the point count is 1 during
drag and drop, that could lead some unexpected behavior if user already
had another pointer touched on screen and it can perform drag. That
symptom may happen when user is using split screen or device has the
waterfall touch screen.
This CL will track the pointer id when starting the drag and drop, so it
could prevent the drag surface jumping to another pointer or cause the
touch didn't work after drop finish.
Bug: 228497357
Test: atest inputflinger_tests CrossAppDragAndDropTests
Change-Id: I8d152d95d1d9ccd65bf953052223ac61a1e910df
diff --git a/services/inputflinger/tests/InputDispatcher_test.cpp b/services/inputflinger/tests/InputDispatcher_test.cpp
index b688898..61e5fe3 100644
--- a/services/inputflinger/tests/InputDispatcher_test.cpp
+++ b/services/inputflinger/tests/InputDispatcher_test.cpp
@@ -6110,8 +6110,7 @@
mDispatcher->setInputWindows({{ADISPLAY_ID_DEFAULT, {mWindow, mSecondWindow}}});
}
- // Start performing drag, we will create a drag window and transfer touch to it.
- void performDrag() {
+ void injectDown() {
ASSERT_EQ(InputEventInjectionResult::SUCCEEDED,
injectMotionDown(mDispatcher, AINPUT_SOURCE_TOUCHSCREEN, ADISPLAY_ID_DEFAULT,
{50, 50}))
@@ -6119,6 +6118,15 @@
// Window should receive motion event.
mWindow->consumeMotionDown(ADISPLAY_ID_DEFAULT);
+ }
+
+ // Start performing drag, we will create a drag window and transfer touch to it.
+ // @param sendDown : if true, send a motion down on first window before perform drag and drop.
+ // Returns true on success.
+ bool performDrag(bool sendDown = true) {
+ if (sendDown) {
+ injectDown();
+ }
// The drag window covers the entire display
mDragWindow = new FakeWindowHandle(mApp, mDispatcher, "DragWindow", ADISPLAY_ID_DEFAULT);
@@ -6126,10 +6134,14 @@
{{ADISPLAY_ID_DEFAULT, {mDragWindow, mWindow, mSecondWindow}}});
// Transfer touch focus to the drag window
- mDispatcher->transferTouchFocus(mWindow->getToken(), mDragWindow->getToken(),
- true /* isDragDrop */);
- mWindow->consumeMotionCancel();
- mDragWindow->consumeMotionDown();
+ bool transferred =
+ mDispatcher->transferTouchFocus(mWindow->getToken(), mDragWindow->getToken(),
+ true /* isDragDrop */);
+ if (transferred) {
+ mWindow->consumeMotionCancel();
+ mDragWindow->consumeMotionDown();
+ }
+ return transferred;
}
// Start performing drag, we will create a drag window and transfer touch to it.
@@ -6276,7 +6288,7 @@
mSecondWindow->assertNoEvents();
}
-TEST_F(InputDispatcherDragTests, DragAndDrop_InvalidWindow) {
+TEST_F(InputDispatcherDragTests, DragAndDropOnInvalidWindow) {
performDrag();
// Set second window invisible.
@@ -6312,6 +6324,89 @@
mSecondWindow->assertNoEvents();
}
+TEST_F(InputDispatcherDragTests, NoDragAndDropWhenMultiFingers) {
+ ASSERT_EQ(InputEventInjectionResult::SUCCEEDED,
+ injectMotionDown(mDispatcher, AINPUT_SOURCE_TOUCHSCREEN, ADISPLAY_ID_DEFAULT,
+ {50, 50}))
+ << "Inject motion event should return InputEventInjectionResult::SUCCEEDED";
+ mWindow->consumeMotionDown(ADISPLAY_ID_DEFAULT);
+
+ const MotionEvent secondFingerDownEvent =
+ MotionEventBuilder(POINTER_1_DOWN, AINPUT_SOURCE_TOUCHSCREEN)
+ .displayId(ADISPLAY_ID_DEFAULT)
+ .eventTime(systemTime(SYSTEM_TIME_MONOTONIC))
+ .pointer(PointerBuilder(/* id */ 0, AMOTION_EVENT_TOOL_TYPE_FINGER).x(50).y(50))
+ .pointer(PointerBuilder(/* id */ 1, AMOTION_EVENT_TOOL_TYPE_FINGER).x(75).y(50))
+ .build();
+ ASSERT_EQ(InputEventInjectionResult::SUCCEEDED,
+ injectMotionEvent(mDispatcher, secondFingerDownEvent, INJECT_EVENT_TIMEOUT,
+ InputEventInjectionSync::WAIT_FOR_RESULT))
+ << "Inject motion event should return InputEventInjectionResult::SUCCEEDED";
+ mWindow->consumeMotionPointerDown(1 /* pointerIndex */);
+
+ // Should not perform drag and drop when window has multi fingers.
+ ASSERT_FALSE(performDrag(false));
+}
+
+TEST_F(InputDispatcherDragTests, DragAndDropWhenSplitTouch) {
+ // First down on second window.
+ ASSERT_EQ(InputEventInjectionResult::SUCCEEDED,
+ injectMotionDown(mDispatcher, AINPUT_SOURCE_TOUCHSCREEN, ADISPLAY_ID_DEFAULT,
+ {150, 50}))
+ << "Inject motion event should return InputEventInjectionResult::SUCCEEDED";
+
+ mSecondWindow->consumeMotionDown(ADISPLAY_ID_DEFAULT);
+
+ // Second down on first window.
+ const MotionEvent secondFingerDownEvent =
+ MotionEventBuilder(POINTER_1_DOWN, AINPUT_SOURCE_TOUCHSCREEN)
+ .displayId(ADISPLAY_ID_DEFAULT)
+ .eventTime(systemTime(SYSTEM_TIME_MONOTONIC))
+ .pointer(
+ PointerBuilder(/* id */ 0, AMOTION_EVENT_TOOL_TYPE_FINGER).x(150).y(50))
+ .pointer(PointerBuilder(/* id */ 1, AMOTION_EVENT_TOOL_TYPE_FINGER).x(50).y(50))
+ .build();
+ ASSERT_EQ(InputEventInjectionResult::SUCCEEDED,
+ injectMotionEvent(mDispatcher, secondFingerDownEvent, INJECT_EVENT_TIMEOUT,
+ InputEventInjectionSync::WAIT_FOR_RESULT))
+ << "Inject motion event should return InputEventInjectionResult::SUCCEEDED";
+ mWindow->consumeMotionDown(ADISPLAY_ID_DEFAULT);
+
+ // Perform drag and drop from first window.
+ ASSERT_TRUE(performDrag(false));
+
+ // Move on window.
+ const MotionEvent secondFingerMoveEvent =
+ MotionEventBuilder(AMOTION_EVENT_ACTION_MOVE, AINPUT_SOURCE_TOUCHSCREEN)
+ .eventTime(systemTime(SYSTEM_TIME_MONOTONIC))
+ .pointer(
+ PointerBuilder(/* id */ 0, AMOTION_EVENT_TOOL_TYPE_FINGER).x(150).y(50))
+ .pointer(PointerBuilder(/* id */ 1, AMOTION_EVENT_TOOL_TYPE_FINGER).x(50).y(50))
+ .build();
+ ASSERT_EQ(InputEventInjectionResult::SUCCEEDED,
+ injectMotionEvent(mDispatcher, secondFingerMoveEvent, INJECT_EVENT_TIMEOUT,
+ InputEventInjectionSync::WAIT_FOR_RESULT));
+ mDragWindow->consumeMotionMove(ADISPLAY_ID_DEFAULT);
+ mWindow->consumeDragEvent(false, 50, 50);
+ mSecondWindow->consumeMotionMove();
+
+ // Release the drag pointer should perform drop.
+ const MotionEvent secondFingerUpEvent =
+ MotionEventBuilder(POINTER_1_UP, AINPUT_SOURCE_TOUCHSCREEN)
+ .eventTime(systemTime(SYSTEM_TIME_MONOTONIC))
+ .pointer(
+ PointerBuilder(/* id */ 0, AMOTION_EVENT_TOOL_TYPE_FINGER).x(150).y(50))
+ .pointer(PointerBuilder(/* id */ 1, AMOTION_EVENT_TOOL_TYPE_FINGER).x(50).y(50))
+ .build();
+ ASSERT_EQ(InputEventInjectionResult::SUCCEEDED,
+ injectMotionEvent(mDispatcher, secondFingerUpEvent, INJECT_EVENT_TIMEOUT,
+ InputEventInjectionSync::WAIT_FOR_RESULT));
+ mDragWindow->consumeMotionUp(ADISPLAY_ID_DEFAULT);
+ mFakePolicy->assertDropTargetEquals(mWindow->getToken());
+ mWindow->assertNoEvents();
+ mSecondWindow->consumeMotionMove();
+}
+
class InputDispatcherDropInputFeatureTest : public InputDispatcherTest {};
TEST_F(InputDispatcherDropInputFeatureTest, WindowDropsInput) {