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(nullptr)
     , m_rootLayer(nullptr)
     , m_rootGraphicsLayer(nullptr)
     , m_rootTransformLayer(nullptr)
     , 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_shouldDispatchFirstLayoutAfterFinishedLoading(false)
     , m_displayMode(WebDisplayModeBrowser)
@@ skipping 186 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 39 matching lines @@
     switch (event.type) {
     case WebInputEvent::GestureFlingStart: {
         if (mainFrameImpl()->frame()->eventHandler().isScrollbarHandlingGestures())
             break;
         endActiveFlingAnimation();
         m_client->cancelScheduledContentIntents();
         m_positionOnFlingStart = WebPoint(event.x, event.y);
         m_globalPositionOnFlingStart = WebPoint(event.globalX, event.globalY);
         m_flingModifier = event.modifiers;
         m_flingSourceDevice = event.sourceDevice;
+        ASSERT(m_flingSourceDevice != WebGestureDeviceUninitialized);
         OwnPtr<WebGestureCurve> flingCurve = adoptPtr(Platform::current()->createFlingAnimationCurve(event.sourceDevice, WebFloatPoint(event.data.flingStart.velocityX, event.data.flingStart.velocityY), WebSize()));
         ASSERT(flingCurve);
         m_gestureAnimation = WebActiveGestureAnimation::createAtAnimationStart(flingCurve.release(), this);
         scheduleAnimation();
         eventSwallowed = true;
 
         // Plugins may need to see GestureFlingStart to balance
         // GestureScrollBegin (since the former replaces GestureScrollEnd when
         // transitioning to a fling).
         PlatformGestureEventBuilder platformEvent(mainFrameImpl()->frameView(), event);
@@ skipping 192 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);
+    ASSERT(parameters.sourceDevice != WebGestureDeviceUninitialized);
+    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 936 matching lines @@
 void WebViewImpl::beginFrame(double lastFrameTimeMonotonic)
 {
     TRACE_EVENT1("blink", "WebViewImpl::beginFrame", "frameTime", lastFrameTimeMonotonic);
     ASSERT(lastFrameTimeMonotonic);
 
     // Create synthetic wheel events as necessary for fling.
     if (m_gestureAnimation) {
         if (m_gestureAnimation->animate(lastFrameTimeMonotonic))
             scheduleAnimation();
         else {
+            ASSERT(m_flingSourceDevice != WebGestureDeviceUninitialized);
+            WebGestureDevice lastFlingSourceDevice = m_flingSourceDevice;
             endActiveFlingAnimation();
 
             PlatformGestureEvent endScrollEvent(PlatformEvent::GestureScrollEnd,
                 m_positionOnFlingStart, m_globalPositionOnFlingStart,
-                IntSize(), 0, PlatformEvent::NoModifiers);
+                IntSize(), 0, PlatformEvent::NoModifiers, lastFlingSourceDevice == 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, lastFrameTimeMonotonic);
@@ skipping 2182 matching lines @@
 
 WebHitTestResult WebViewImpl::hitTestResultForTap(const WebPoint& tapPointWindowPos, const WebSize& tapArea)
 {
     if (!m_page->mainFrame()->isLocalFrame())
         return HitTestResult();
 
     WebGestureEvent tapEvent;
     tapEvent.x = tapPointWindowPos.x;
     tapEvent.y = tapPointWindowPos.y;
     tapEvent.type = WebInputEvent::GestureTap;
+    // GestureTap is only ever from a touchscreen.
+    tapEvent.sourceDevice = WebGestureDeviceTouchscreen;
     tapEvent.data.tap.tapCount = 1;
     tapEvent.data.tap.width = tapArea.width;
     tapEvent.data.tap.height = tapArea.height;
 
     PlatformGestureEventBuilder platformEvent(mainFrameImpl()->frameView(), tapEvent);
 
     HitTestResult result = m_page->deprecatedLocalMainFrame()->eventHandler().hitTestResultForGestureEvent(platformEvent, HitTestRequest::ReadOnly | HitTestRequest::Active).hitTestResult();
 
     result.setToShadowHostIfInUserAgentShadowRoot();
     return result;
@@ skipping 334 matching lines @@
     if (m_pageColorOverlay)
         m_pageColorOverlay->update();
     if (InspectorOverlay* overlay = inspectorOverlay()) {
         PageOverlay* inspectorPageOverlay = overlay->pageOverlay();
         if (inspectorPageOverlay)
             inspectorPageOverlay->update();
     }
 }
 
 } // namespace blink