gpu benchmarking swipe for touchpad

content/browser/renderer_host/input/synthetic_gesture_target_base.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/renderer_host/input/synthetic_gesture_target_base.h"
 
 #include "content/browser/renderer_host/render_widget_host_impl.h"
 #include "content/browser/renderer_host/render_widget_host_view_base.h"
 #include "content/browser/renderer_host/ui_events_helper.h"
 #include "content/common/input_messages.h"
 #include "third_party/WebKit/public/platform/WebInputEvent.h"
 #include "ui/events/blink/web_input_event_traits.h"
 #include "ui/events/event.h"
 #include "ui/events/latency_info.h"
 
 using blink::WebInputEvent;
 using blink::WebTouchEvent;
 using blink::WebTouchPoint;
 using blink::WebMouseEvent;
 using blink::WebMouseWheelEvent;
+using blink::WebGestureEvent;
 
 namespace content {
 namespace {
 
 // This value was determined experimentally. It was sufficient to not cause a
 // fling on Android and Aura.
 const int kPointerAssumedStoppedTimeMs = 100;
 
 // SyntheticGestureTargetBase passes input events straight on to the renderer
 // without going through a gesture recognition framework. There is thus no touch
@@ skipping 37 matching lines @@
     CHECK(PointIsWithinContents(web_wheel.x, web_wheel.y))
         << "Mouse wheel position is not within content bounds.";
     DispatchWebMouseWheelEventToPlatform(web_wheel, latency_info);
   } else if (WebInputEvent::isMouseEventType(event.type())) {
     const WebMouseEvent& web_mouse =
         static_cast<const WebMouseEvent&>(event);
     CHECK(event.type() != WebInputEvent::MouseDown ||
           PointIsWithinContents(web_mouse.x, web_mouse.y))
         << "Mouse pointer is not within content bounds on MouseDown.";
     DispatchWebMouseEventToPlatform(web_mouse, latency_info);
+  } else if (event.type() == WebInputEvent::GestureFlingStart) {
+    const WebGestureEvent& gesture_event =
+        static_cast<const WebGestureEvent&>(event);
+    CHECK(gesture_event.sourceDevice == blink::WebGestureDeviceTouchpad)
+        << "The gesture event source must be touchpad.";
+    DispatchTouchpadGestureFlingStartToPlatform(gesture_event, latency_info);
   } else {
     NOTREACHED();
   }
 }
 
 void SyntheticGestureTargetBase::DispatchWebTouchEventToPlatform(
       const blink::WebTouchEvent& web_touch,
       const ui::LatencyInfo& latency_info) {
   // We assume that platforms supporting touch have their own implementation of
   // SyntheticGestureTarget to route the events through their respective input
   // stack.
   CHECK(false) << "Touch events not supported for this browser.";
 }
 
 void SyntheticGestureTargetBase::DispatchWebMouseWheelEventToPlatform(
       const blink::WebMouseWheelEvent& web_wheel,
       const ui::LatencyInfo& latency_info) {
   host_->ForwardWheelEventWithLatencyInfo(web_wheel, latency_info);
 }
 
 void SyntheticGestureTargetBase::DispatchWebMouseEventToPlatform(
       const blink::WebMouseEvent& web_mouse,
       const ui::LatencyInfo& latency_info) {
   host_->ForwardMouseEventWithLatencyInfo(web_mouse, latency_info);
 }
 
+void SyntheticGestureTargetBase::DispatchTouchpadGestureFlingStartToPlatform(
+    const blink::WebGestureEvent& web_gesture,
+    const ui::LatencyInfo& latency_info) {
+  DCHECK_EQ(web_gesture.type(), WebInputEvent::GestureFlingStart);
+  DCHECK_EQ(web_gesture.sourceDevice, blink::WebGestureDeviceTouchpad);
+  host_->ForwardGestureEventWithLatencyInfo(web_gesture, latency_info);

[bokan, 2017/03/10 14:41:57]

This base implementation is meant to work on Mac? Doesn't Mac's event stream for
flings differ significantly enough that this won't work?

[sahel, 2017/03/10 21:51:41]

Swipe for touchpad sends a bunch of mouse wheel events followed by a fling
event. The only platform that has this event sequence is ChromeOS.
In aura implementation I generate a ui event from the fling gesture event.
But in the base implementation I just forward the GFS event itself.

Does it work on mac or not? yes it does, but it doesn't simulate the event
sequence on mac and it's not intended to do so. This is used for testing
parts of the code that handle touchpad fling.

+}
+
 void SyntheticGestureTargetBase::SetNeedsFlush() {
   host_->SetNeedsFlush();
 }
 
 SyntheticGestureParams::GestureSourceType
 SyntheticGestureTargetBase::GetDefaultSyntheticGestureSourceType() const {
   return SyntheticGestureParams::MOUSE_INPUT;
 }
 
 base::TimeDelta SyntheticGestureTargetBase::PointerAssumedStoppedTime()
@@ skipping 12 matching lines @@
   return 0.0f;
 }
 
 bool SyntheticGestureTargetBase::PointIsWithinContents(int x, int y) const {
   gfx::Rect bounds = host_->GetView()->GetViewBounds();
   bounds -= bounds.OffsetFromOrigin();  // Translate the bounds to (0,0).
   return bounds.Contains(x, y);
 }
 
 }  // namespace content