[DevTools] Touch emulation in content.

content/browser/renderer_host/render_widget_host_unittest.cc

Index: content/browser/renderer_host/render_widget_host_unittest.cc
diff --git a/content/browser/renderer_host/render_widget_host_unittest.cc b/content/browser/renderer_host/render_widget_host_unittest.cc
index 979cc669802d54bf6b5568a97ff0745b7e76f8a3..f998d830ecf457bf1cb5877a438bdaa176762ec7 100644
--- a/content/browser/renderer_host/render_widget_host_unittest.cc
+++ b/content/browser/renderer_host/render_widget_host_unittest.cc
@@ -48,6 +48,7 @@ using base::TimeDelta;
 using blink::WebGestureEvent;
 using blink::WebInputEvent;
 using blink::WebKeyboardEvent;
+using blink::WebMouseEvent;
 using blink::WebMouseWheelEvent;
 using blink::WebTouchEvent;
 using blink::WebTouchPoint;
@@ -199,6 +200,7 @@ class MockRenderWidgetHost : public RenderWidgetHostImpl {
       : RenderWidgetHostImpl(delegate, process, routing_id, false),
         unresponsive_timer_fired_(false) {
     input_router_impl_ = static_cast<InputRouterImpl*>(input_router_.get());
+    acked_touch_event_type_ = blink::WebInputEvent::Undefined;
   }
 
   // Allow poking at a few private members.
@@ -261,6 +263,18 @@ class MockRenderWidgetHost : public RenderWidgetHostImpl {
     return touch_event_queue().empty();
   }
 
+  virtual void OnTouchEventAck(

[jdduke (slow), 2014/04/10 16:49:46]

Is there a reason you didn't re-use the touch ack bookkeeping provided by
TestView below? It exposes |acked_event()| which should be equivalent, so
|view_->acked_event().type| should be what you want (I could be wrong).

[dgozman, 2014/04/10 17:38:03]

Touch emulator handles ack before view and consumes it.

[jdduke (slow), 2014/04/10 17:40:22]

Of course, silly me! Still lgtm :)

+      const TouchEventWithLatencyInfo& event,
+      InputEventAckState ack_result) OVERRIDE {
+    // Sniff touch acks.
+    acked_touch_event_type_ = event.event.type;
+    RenderWidgetHostImpl::OnTouchEventAck(event, ack_result);
+  }
+
+  WebInputEvent::Type acked_touch_event_type() const {
+    return acked_touch_event_type_;
+  }
+
   bool ScrollStateIsContentScrolling() const {
     return scroll_state() == OverscrollController::STATE_CONTENT_SCROLLING;
   }
@@ -321,6 +335,7 @@ class MockRenderWidgetHost : public RenderWidgetHostImpl {
 
  private:
   bool unresponsive_timer_fired_;
+  WebInputEvent::Type acked_touch_event_type_;
 
   // |input_router_impl_| and |mock_input_router_| are owned by
   // RenderWidgetHostImpl.  The handles below are provided for convenience so
@@ -582,7 +597,10 @@ class RenderWidgetHostTest : public testing::Test {
   RenderWidgetHostTest()
       : process_(NULL),
         handle_key_press_event_(false),
-        handle_mouse_event_(false) {
+        handle_mouse_event_(false),
+        simulated_event_time_delta_seconds_(0) {
+    last_simulated_event_time_seconds_ =
+        (base::TimeTicks::Now() - base::TimeTicks()).InSecondsF();
   }
   virtual ~RenderWidgetHostTest() {
   }
@@ -645,10 +663,20 @@ class RenderWidgetHostTest : public testing::Test {
     host_->OnMessageReceived(*response);
   }
 
+  double GetNextSimulatedEventTimeSeconds() {
+    last_simulated_event_time_seconds_ += simulated_event_time_delta_seconds_;
+    return last_simulated_event_time_seconds_;
+  }
+
   void SimulateKeyboardEvent(WebInputEvent::Type type) {
-  WebKeyboardEvent event = SyntheticWebKeyboardEventBuilder::Build(type);
-  NativeWebKeyboardEvent native_event;
-  memcpy(&native_event, &event, sizeof(event));
+    SimulateKeyboardEvent(type, 0);
+  }
+
+  void SimulateKeyboardEvent(WebInputEvent::Type type, int modifiers) {
+    WebKeyboardEvent event = SyntheticWebKeyboardEventBuilder::Build(type);
+    event.modifiers = modifiers;
+    NativeWebKeyboardEvent native_event;
+    memcpy(&native_event, &event, sizeof(event));
     host_->ForwardKeyboardEvent(native_event);
   }
 
@@ -679,11 +707,17 @@ class RenderWidgetHostTest : public testing::Test {
   }
 
   void SimulateMouseMove(int x, int y, int modifiers) {
-    host_->ForwardMouseEvent(
-        SyntheticWebMouseEventBuilder::Build(WebInputEvent::MouseMove,
-                                             x,
-                                             y,
-                                             modifiers));
+    SimulateMouseEvent(WebInputEvent::MouseMove, x, y, modifiers, false);
+  }
+
+  void SimulateMouseEvent(
+      WebInputEvent::Type type, int x, int y, int modifiers, bool pressed) {
+    WebMouseEvent event =
+        SyntheticWebMouseEventBuilder::Build(type, x, y, modifiers);
+    if (pressed)
+      event.button = WebMouseEvent::ButtonLeft;
+    event.timeStampSeconds = GetNextSimulatedEventTimeSeconds();
+    host_->ForwardMouseEvent(event);
   }
 
   void SimulateWheelEventWithPhase(WebMouseWheelEvent::Phase phase) {
@@ -788,6 +822,8 @@ class RenderWidgetHostTest : public testing::Test {
   scoped_ptr<gfx::Screen> screen_;
   bool handle_key_press_event_;
   bool handle_mouse_event_;
+  double last_simulated_event_time_seconds_;
+  double simulated_event_time_delta_seconds_;
 
  private:
   SyntheticWebTouchEvent touch_event_;
@@ -2381,6 +2417,203 @@ TEST_F(RenderWidgetHostTest, OverscrollResetsOnBlur) {
   process_->sink().ClearMessages();
 }
 
+std::string GetInputMessageTypes(RenderWidgetHostProcess* process) {
+  const WebInputEvent* event = NULL;
+  ui::LatencyInfo latency_info;
+  bool is_keyboard_shortcut;
+  std::string result;
+  for (size_t i = 0; i < process->sink().message_count(); ++i) {
+    const IPC::Message *message = process->sink().GetMessageAt(i);
+    EXPECT_EQ(InputMsg_HandleInputEvent::ID, message->type());
+    EXPECT_TRUE(InputMsg_HandleInputEvent::Read(
+        message, &event, &latency_info, &is_keyboard_shortcut));
+    if (i != 0)
+      result += " ";
+    result += WebInputEventTraits::GetName(event->type);
+  }
+  process->sink().ClearMessages();
+  return result;
+}
+
+TEST_F(RenderWidgetHostTest, TouchEmulator) {
+  simulated_event_time_delta_seconds_ = 0.1;
+  host_->DisableGestureDebounce();
+  // Immediately ack all touches instead of sending them to the renderer.
+  host_->OnMessageReceived(ViewHostMsg_HasTouchEventHandlers(0, false));
+  host_->OnMessageReceived(
+      ViewHostMsg_SetTouchEventEmulationEnabled(0, true, true));
+  process_->sink().ClearMessages();
+  view_->set_bounds(gfx::Rect(0, 0, 400, 200));
+  view_->Show();
+
+  SimulateMouseEvent(WebInputEvent::MouseMove, 10, 10, 0, false);
+  EXPECT_EQ(0U, process_->sink().message_count());
+
+  // Mouse press becomes touch start which in turn becomes tap.
+  SimulateMouseEvent(WebInputEvent::MouseDown, 10, 10, 0, true);
+  EXPECT_EQ(WebInputEvent::TouchStart, host_->acked_touch_event_type());
+  EXPECT_EQ("GestureTapDown", GetInputMessageTypes(process_));
+  SendInputEventACK(WebInputEvent::GestureTapDown,
+                    INPUT_EVENT_ACK_STATE_NOT_CONSUMED);
+
+  // Mouse drag generates touch move, cancels tap and starts scroll.
+  SimulateMouseEvent(WebInputEvent::MouseMove, 10, 30, 0, true);
+  EXPECT_EQ(WebInputEvent::TouchMove, host_->acked_touch_event_type());
+  EXPECT_EQ(
+      "GestureTapCancel GestureScrollBegin GestureScrollUpdate",
+      GetInputMessageTypes(process_));
+  SendInputEventACK(WebInputEvent::GestureTapCancel,
+                    INPUT_EVENT_ACK_STATE_NOT_CONSUMED);
+  SendInputEventACK(WebInputEvent::GestureScrollBegin,
+                    INPUT_EVENT_ACK_STATE_CONSUMED);
+  SendInputEventACK(WebInputEvent::GestureScrollUpdate,
+                    INPUT_EVENT_ACK_STATE_CONSUMED);
+  EXPECT_EQ(0U, process_->sink().message_count());
+
+  // Mouse drag with shift becomes pinch.
+  SimulateMouseEvent(
+      WebInputEvent::MouseMove, 10, 40, WebInputEvent::ShiftKey, true);
+  EXPECT_EQ(WebInputEvent::TouchMove, host_->acked_touch_event_type());
+  EXPECT_EQ("GesturePinchBegin",
+            GetInputMessageTypes(process_));
+  SendInputEventACK(WebInputEvent::GesturePinchBegin,
+                    INPUT_EVENT_ACK_STATE_CONSUMED);
+  EXPECT_EQ(0U, process_->sink().message_count());
+
+  SimulateMouseEvent(
+      WebInputEvent::MouseMove, 10, 50, WebInputEvent::ShiftKey, true);
+  EXPECT_EQ(WebInputEvent::TouchMove, host_->acked_touch_event_type());
+  EXPECT_EQ("GesturePinchUpdate",
+            GetInputMessageTypes(process_));
+  SendInputEventACK(WebInputEvent::GesturePinchUpdate,
+                    INPUT_EVENT_ACK_STATE_CONSUMED);
+  EXPECT_EQ(0U, process_->sink().message_count());
+
+  // Mouse drag without shift becomes scroll again.
+  SimulateMouseEvent(WebInputEvent::MouseMove, 10, 60, 0, true);
+  EXPECT_EQ(WebInputEvent::TouchMove, host_->acked_touch_event_type());
+  EXPECT_EQ("GesturePinchEnd GestureScrollUpdate",
+            GetInputMessageTypes(process_));
+  SendInputEventACK(WebInputEvent::GestureScrollUpdate,
+                    INPUT_EVENT_ACK_STATE_CONSUMED);
+  EXPECT_EQ(0U, process_->sink().message_count());
+
+  SimulateMouseEvent(WebInputEvent::MouseMove, 10, 70, 0, true);
+  EXPECT_EQ(WebInputEvent::TouchMove, host_->acked_touch_event_type());
+  EXPECT_EQ("GestureScrollUpdate",
+            GetInputMessageTypes(process_));
+  SendInputEventACK(WebInputEvent::GestureScrollUpdate,
+                    INPUT_EVENT_ACK_STATE_CONSUMED);
+  EXPECT_EQ(0U, process_->sink().message_count());
+
+  SimulateMouseEvent(WebInputEvent::MouseUp, 10, 70, 0, true);
+  EXPECT_EQ(WebInputEvent::TouchEnd, host_->acked_touch_event_type());
+  EXPECT_EQ("GestureScrollEnd", GetInputMessageTypes(process_));
+  SendInputEventACK(WebInputEvent::GestureScrollEnd,
+                    INPUT_EVENT_ACK_STATE_CONSUMED);
+  EXPECT_EQ(0U, process_->sink().message_count());
+
+  // Mouse move does nothing.
+  SimulateMouseEvent(WebInputEvent::MouseMove, 10, 80, 0, false);
+  EXPECT_EQ(0U, process_->sink().message_count());
+
+  // Another mouse down continues scroll.
+  SimulateMouseEvent(WebInputEvent::MouseDown, 10, 80, 0, true);
+  EXPECT_EQ(WebInputEvent::TouchStart, host_->acked_touch_event_type());
+  EXPECT_EQ("GestureTapDown", GetInputMessageTypes(process_));
+  SendInputEventACK(WebInputEvent::GestureTapDown,
+                    INPUT_EVENT_ACK_STATE_NOT_CONSUMED);
+  EXPECT_EQ(0U, process_->sink().message_count());
+
+  SimulateMouseEvent(WebInputEvent::MouseMove, 10, 100, 0, true);
+  EXPECT_EQ(WebInputEvent::TouchMove, host_->acked_touch_event_type());
+  EXPECT_EQ(
+      "GestureTapCancel GestureScrollBegin GestureScrollUpdate",
+      GetInputMessageTypes(process_));
+  SendInputEventACK(WebInputEvent::GestureTapCancel,
+                    INPUT_EVENT_ACK_STATE_NOT_CONSUMED);
+  SendInputEventACK(WebInputEvent::GestureScrollBegin,
+                    INPUT_EVENT_ACK_STATE_CONSUMED);
+  SendInputEventACK(WebInputEvent::GestureScrollUpdate,
+                    INPUT_EVENT_ACK_STATE_CONSUMED);
+  EXPECT_EQ(0U, process_->sink().message_count());
+
+  // Another pinch.
+  SimulateMouseEvent(
+      WebInputEvent::MouseMove, 10, 110, WebInputEvent::ShiftKey, true);
+  EXPECT_EQ(WebInputEvent::TouchMove, host_->acked_touch_event_type());
+  EXPECT_EQ("GesturePinchBegin",
+            GetInputMessageTypes(process_));
+  SendInputEventACK(WebInputEvent::GesturePinchBegin,
+                    INPUT_EVENT_ACK_STATE_CONSUMED);
+  EXPECT_EQ(0U, process_->sink().message_count());
+
+  SimulateMouseEvent(
+      WebInputEvent::MouseMove, 10, 120, WebInputEvent::ShiftKey, true);
+  EXPECT_EQ(WebInputEvent::TouchMove, host_->acked_touch_event_type());
+  EXPECT_EQ("GesturePinchUpdate",
+            GetInputMessageTypes(process_));
+  SendInputEventACK(WebInputEvent::GesturePinchUpdate,
+                    INPUT_EVENT_ACK_STATE_CONSUMED);
+  EXPECT_EQ(0U, process_->sink().message_count());
+
+  // Turn off emulation during a pinch.
+  host_->OnMessageReceived(
+      ViewHostMsg_SetTouchEventEmulationEnabled(0, false, false));
+  EXPECT_EQ(WebInputEvent::TouchCancel, host_->acked_touch_event_type());
+  EXPECT_EQ("GesturePinchEnd GestureScrollEnd",
+            GetInputMessageTypes(process_));
+  SendInputEventACK(WebInputEvent::GesturePinchEnd,
+                    INPUT_EVENT_ACK_STATE_CONSUMED);
+  SendInputEventACK(WebInputEvent::GestureScrollEnd,
+                    INPUT_EVENT_ACK_STATE_CONSUMED);
+  EXPECT_EQ(0U, process_->sink().message_count());
+
+  // Mouse event should pass untouched.
+  SimulateMouseEvent(
+      WebInputEvent::MouseMove, 10, 10, WebInputEvent::ShiftKey, true);
+  EXPECT_EQ("MouseMove", GetInputMessageTypes(process_));
+  SendInputEventACK(WebInputEvent::MouseMove,
+                    INPUT_EVENT_ACK_STATE_CONSUMED);
+  EXPECT_EQ(0U, process_->sink().message_count());
+
+  // Turn on emulation.
+  host_->OnMessageReceived(
+      ViewHostMsg_SetTouchEventEmulationEnabled(0, true, true));
+  EXPECT_EQ(0U, process_->sink().message_count());
+
+  // Another touch.
+  SimulateMouseEvent(WebInputEvent::MouseDown, 10, 10, 0, true);
+  EXPECT_EQ(WebInputEvent::TouchStart, host_->acked_touch_event_type());
+  EXPECT_EQ("GestureTapDown", GetInputMessageTypes(process_));
+  SendInputEventACK(WebInputEvent::GestureTapDown,
+                    INPUT_EVENT_ACK_STATE_NOT_CONSUMED);
+  EXPECT_EQ(0U, process_->sink().message_count());
+
+  // Scroll.
+  SimulateMouseEvent(WebInputEvent::MouseMove, 10, 30, 0, true);
+  EXPECT_EQ(WebInputEvent::TouchMove, host_->acked_touch_event_type());
+  EXPECT_EQ(
+      "GestureTapCancel GestureScrollBegin GestureScrollUpdate",
+      GetInputMessageTypes(process_));
+  SendInputEventACK(WebInputEvent::GestureTapCancel,
+                    INPUT_EVENT_ACK_STATE_NOT_CONSUMED);
+  SendInputEventACK(WebInputEvent::GestureScrollBegin,
+                    INPUT_EVENT_ACK_STATE_CONSUMED);
+  SendInputEventACK(WebInputEvent::GestureScrollUpdate,
+                    INPUT_EVENT_ACK_STATE_CONSUMED);
+
+  // Turn off emulation during a scroll.
+  host_->OnMessageReceived(
+      ViewHostMsg_SetTouchEventEmulationEnabled(0, false, false));
+  EXPECT_EQ(WebInputEvent::TouchCancel, host_->acked_touch_event_type());
+
+  EXPECT_EQ("GestureScrollEnd", GetInputMessageTypes(process_));
+  SendInputEventACK(WebInputEvent::GestureScrollEnd,
+                    INPUT_EVENT_ACK_STATE_CONSUMED);
+  EXPECT_EQ(0U, process_->sink().message_count());
+}
+
 #define TEST_InputRouterRoutes_NOARGS(INPUTMSG) \
   TEST_F(RenderWidgetHostTest, InputRouterRoutes##INPUTMSG) { \
     host_->SetupForInputRouterTest(); \