Plumb gesture source value through Blink.

third_party/WebKit/Source/web/WebViewImpl.cpp

 /*
  * Copyright (C) 2011, 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 419 matching lines @@
     , m_isTransparent(false)
     , m_tabsToLinks(false)
     , m_layerTreeView(0)
     , m_rootLayer(0)
     , m_rootGraphicsLayer(0)
     , m_rootTransformLayer(0)
     , m_graphicsLayerFactory(adoptPtr(new GraphicsLayerFactoryChromium(this)))
     , m_matchesHeuristicsForGpuRasterization(false)
     , m_recreatingGraphicsContext(false)
     , m_flingModifier(0)
-    , m_flingSourceDevice(false)
+    , m_flingSourceDevice(WebGestureDeviceUninitialized)
     , m_fullscreenController(FullscreenController::create(this))
     , m_showFPSCounter(false)
     , m_baseBackgroundColor(Color::white)
     , m_backgroundColorOverride(Color::transparent)
     , m_zoomFactorOverride(0)
     , m_userGestureObserved(false)
     , m_shouldDispatchFirstVisuallyNonEmptyLayout(false)
     , m_shouldDispatchFirstLayoutAfterFinishedParsing(false)
     , m_displayMode(WebDisplayModeBrowser)
     , m_elasticOverscroll(FloatSize())
@@ skipping 184 matching lines @@
 }
 
 bool WebViewImpl::handleMouseWheel(LocalFrame& mainFrame, const WebMouseWheelEvent& event)
 {
     hidePopups();
     return PageWidgetEventHandler::handleMouseWheel(mainFrame, event);
 }
 
 bool WebViewImpl::scrollBy(const WebFloatSize& delta, const WebFloatSize& velocity)
 {
+    ASSERT(m_flingSourceDevice != WebGestureDeviceUninitialized);
     if (m_flingSourceDevice == WebGestureDeviceTouchpad) {
         WebMouseWheelEvent syntheticWheel;
         const float tickDivisor = WheelEvent::TickMultiplier;
 
         syntheticWheel.deltaX = delta.width;
         syntheticWheel.deltaY = delta.height;
         syntheticWheel.wheelTicksX = delta.width / tickDivisor;
         syntheticWheel.wheelTicksY = delta.height / tickDivisor;
         syntheticWheel.hasPreciseScrollingDeltas = true;
         syntheticWheel.x = m_positionOnFlingStart.x;
@@ skipping 251 matching lines @@
 void WebViewImpl::transferActiveWheelFlingAnimation(const WebActiveWheelFlingParameters& parameters)
 {
     TRACE_EVENT0("blink", "WebViewImpl::transferActiveWheelFlingAnimation");
     ASSERT(!m_gestureAnimation);
     m_positionOnFlingStart = parameters.point;
     m_globalPositionOnFlingStart = parameters.globalPoint;
     m_flingModifier = parameters.modifiers;
     OwnPtr<WebGestureCurve> curve = adoptPtr(Platform::current()->createFlingAnimationCurve(parameters.sourceDevice, WebFloatPoint(parameters.delta), parameters.cumulativeScroll));
     ASSERT(curve);
     m_gestureAnimation = WebActiveGestureAnimation::createWithTimeOffset(curve.release(), this, parameters.startTime);
+    m_flingSourceDevice = parameters.sourceDevice;
     scheduleAnimation();
 }
 
 bool WebViewImpl::endActiveFlingAnimation()
 {
     if (m_gestureAnimation) {
         m_gestureAnimation.clear();
+        m_flingSourceDevice = WebGestureDeviceUninitialized;
         if (m_layerTreeView)
             m_layerTreeView->didStopFlinging();
         return true;
     }
     return false;
 }
 
 bool WebViewImpl::startPageScaleAnimation(const IntPoint& targetPosition, bool useAnchor, float newScale, double durationInSeconds)
 {
     VisualViewport& visualViewport = page()->frameHost().visualViewport();
@@ skipping 932 matching lines @@
     TRACE_EVENT1("blink", "WebViewImpl::beginFrame", "frameTime", frameTime.lastFrameTimeMonotonic);
     ASSERT(frameTime.lastFrameTimeMonotonic);
 
     // Create synthetic wheel events as necessary for fling.
     if (m_gestureAnimation) {
         if (m_gestureAnimation->animate(frameTime.lastFrameTimeMonotonic))
             scheduleAnimation();
         else {
             endActiveFlingAnimation();
 
+            ASSERT(m_flingSourceDevice != WebGestureDeviceUninitialized);
             PlatformGestureEvent endScrollEvent(PlatformEvent::GestureScrollEnd,
                 m_positionOnFlingStart, m_globalPositionOnFlingStart,
-                IntSize(), 0, PlatformEvent::NoModifiers);
+                IntSize(), 0, PlatformEvent::NoModifiers, m_flingSourceDevice == WebGestureDeviceTouchpad ? PlatformGestureSourceTouchpad : PlatformGestureSourceTouchscreen);
             endScrollEvent.setScrollGestureData(0, 0, 0, 0, true, false, -1 /* null plugin id */);
 
             mainFrameImpl()->frame()->eventHandler().handleGestureScrollEnd(endScrollEvent);
         }
     }
 
     if (!m_page)
         return;
 
     PageWidgetDelegate::animate(*m_page, frameTime.lastFrameTimeMonotonic);
@@ skipping 2562 matching lines @@
     if (m_pageColorOverlay)
         m_pageColorOverlay->update();
     if (InspectorOverlay* overlay = inspectorOverlay()) {
         PageOverlay* inspectorPageOverlay = overlay->pageOverlay();
         if (inspectorPageOverlay)
             inspectorPageOverlay->update();
     }
 }
 
 } // namespace blink