Added PointerEvent firing on touch events.

Source/core/page/EventHandler.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2012 Digia Plc. and/or its subsidiary(-ies)
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 27 matching lines @@
 #include "core/dom/TouchList.h"
 #include "core/dom/shadow/ComposedTreeTraversal.h"
 #include "core/dom/shadow/ShadowRoot.h"
 #include "core/editing/Editor.h"
 #include "core/editing/FrameSelection.h"
 #include "core/editing/htmlediting.h"
 #include "core/editing/iterators/TextIterator.h"
 #include "core/events/EventPath.h"
 #include "core/events/KeyboardEvent.h"
 #include "core/events/MouseEvent.h"
+#include "core/events/PointerEvent.h"
 #include "core/events/TextEvent.h"
 #include "core/events/TouchEvent.h"
 #include "core/events/WheelEvent.h"
 #include "core/fetch/ImageResource.h"
 #include "core/frame/EventHandlerRegistry.h"
 #include "core/frame/FrameHost.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
 #include "core/frame/PinchViewport.h"
 #include "core/frame/Settings.h"
@@ skipping 172 matching lines @@
     , m_fakeMouseMoveEventTimer(this, &EventHandler::fakeMouseMoveEventTimerFired)
     , m_svgPan(false)
     , m_resizeScrollableArea(nullptr)
     , m_eventHandlerWillResetCapturingMouseEventsNode(0)
     , m_clickCount(0)
     , m_shouldOnlyFireDragOverEvent(false)
     , m_mousePositionIsUnknown(true)
     , m_mouseDownTimestamp(0)
     , m_widgetIsLatched(false)
     , m_touchPressed(false)
+    , m_primaryPointerId(0)
     , m_scrollGestureHandlingNode(nullptr)
     , m_lastGestureScrollOverWidget(false)
     , m_maxMouseMovedDuration(0)
     , m_longTapShouldInvokeContextMenu(false)
     , m_activeIntervalTimer(this, &EventHandler::activeIntervalTimerFired)
     , m_lastShowPressTimestamp(0)
     , m_deltaConsumedForScrollSequence(false)
 {
 }
 
@@ skipping 60 matching lines @@
     m_previousWheelScrolledNode = nullptr;
     m_targetForTouchID.clear();
     m_touchSequenceDocument.clear();
     m_touchSequenceUserGestureToken.clear();
     m_scrollGestureHandlingNode = nullptr;
     m_lastGestureScrollOverWidget = false;
     m_previousGestureScrolledNode = nullptr;
     m_scrollbarHandlingScrollGesture = nullptr;
     m_maxMouseMovedDuration = 0;
     m_touchPressed = false;
+    m_primaryPointerId = 0;
     m_mouseDownMayStartSelect = false;
     m_mouseDownMayStartDrag = false;
     m_lastShowPressTimestamp = 0;
     m_lastDeferredTapElement = nullptr;
     m_eventHandlerWillResetCapturingMouseEventsNode = false;
     m_mouseDownWasSingleClickInSelection = false;
     m_selectionInitiationState = HaveNotStartedSelection;
     m_mouseDownMayStartAutoscroll = false;
     m_svgPan = false;
     m_mouseDownPos = IntPoint();
@@ skipping 3439 matching lines @@
             m_lastScrollbarUnderMouse->mouseExited();
 
         // Send mouse entered if we're setting a new scrollbar.
         if (scrollbar && setLast)
             scrollbar->mouseEntered();
 
         m_lastScrollbarUnderMouse = setLast ? scrollbar : nullptr;
     }
 }
 
-static const AtomicString& eventNameForTouchPointState(PlatformTouchPoint::State state)
+static const AtomicString& touchEventNameForTouchPointState(PlatformTouchPoint::State state)
 {
     switch (state) {
     case PlatformTouchPoint::TouchReleased:
         return EventTypeNames::touchend;
     case PlatformTouchPoint::TouchCancelled:
         return EventTypeNames::touchcancel;
     case PlatformTouchPoint::TouchPressed:
         return EventTypeNames::touchstart;
     case PlatformTouchPoint::TouchMoved:
         return EventTypeNames::touchmove;
     case PlatformTouchPoint::TouchStationary:
         // TouchStationary state is not converted to touch events, so fall through to assert.
     default:
         ASSERT_NOT_REACHED();
         return emptyAtom;
     }
 }
 
+static const AtomicString& pointerEventNameForTouchPointState(PlatformTouchPoint::State state)
+{
+    switch (state) {
+    case PlatformTouchPoint::TouchReleased:
+        return EventTypeNames::pointerup;
+    case PlatformTouchPoint::TouchCancelled:
+        return EventTypeNames::pointercancel;
+    case PlatformTouchPoint::TouchPressed:
+        return EventTypeNames::pointerdown;
+    case PlatformTouchPoint::TouchMoved:
+        return EventTypeNames::pointermove;
+    case PlatformTouchPoint::TouchStationary:
+        // TouchStationary state is not converted to touch events, so fall through to assert.
+    default:
+        ASSERT_NOT_REACHED();
+        return emptyAtom;
+    }
+}
+
 HitTestResult EventHandler::hitTestResultInFrame(LocalFrame* frame, const LayoutPoint& point, HitTestRequest::HitTestRequestType hitType)
 {
     HitTestResult result(HitTestRequest(hitType), point);
 
     if (!frame || !frame->contentLayoutObject())
         return result;
     if (frame->view()) {
         IntRect rect = frame->view()->visibleContentRect(IncludeScrollbars);
         if (!rect.contains(roundedIntPoint(point)))
             return result;
     }
     frame->contentLayoutObject()->hitTest(result);
     return result;
 }
 
 bool EventHandler::handleTouchEvent(const PlatformTouchEvent& event)
 {
     TRACE_EVENT0("blink", "EventHandler::handleTouchEvent");
 
     const Vector<PlatformTouchPoint>& points = event.touchPoints();
 
-    unsigned i;
     bool freshTouchEvents = true;
     bool allTouchReleased = true;
-    for (i = 0; i < points.size(); ++i) {
+    for (unsigned i = 0; i < points.size(); ++i) {
         const PlatformTouchPoint& point = points[i];
         if (point.state() != PlatformTouchPoint::TouchPressed)
             freshTouchEvents = false;
         if (point.state() != PlatformTouchPoint::TouchReleased && point.state() != PlatformTouchPoint::TouchCancelled)
             allTouchReleased = false;
     }
     if (freshTouchEvents) {
         // Ideally we'd ASSERT !m_touchSequenceDocument here since we should
         // have cleared the active document when we saw the last release. But we
         // have some tests that violate this, ClusterFuzz could trigger it, and
@@ skipping 13 matching lines @@
     m_touchSequenceUserGestureToken = gestureIndicator->currentToken();
 
     ASSERT(m_frame->view());
     if (m_touchSequenceDocument && (!m_touchSequenceDocument->frame() || !m_touchSequenceDocument->frame()->view())) {
         // If the active touch document has no frame or view, it's probably being destroyed
         // so we can't dispatch events.
         return false;
     }
 
     // First do hit tests for any new touch points.
-    for (i = 0; i < points.size(); ++i) {
+    for (unsigned i = 0; i < points.size(); ++i) {
         const PlatformTouchPoint& point = points[i];
 
         // Touch events implicitly capture to the touched node, and don't change
         // active/hover states themselves (Gesture events do). So we only need
         // to hit-test on touchstart, and it can be read-only.
         if (point.state() == PlatformTouchPoint::TouchPressed) {
             HitTestRequest::HitTestRequestType hitType = HitTestRequest::TouchEvent | HitTestRequest::ReadOnly | HitTestRequest::Active;
             LayoutPoint pagePoint = roundedLayoutPoint(m_frame->view()->rootFrameToContents(point.pos()));
             HitTestResult result;
             if (!m_touchSequenceDocument) {
@@ skipping 14 matching lines @@
                 node = ComposedTreeTraversal::parent(*node);
 
             if (!m_touchSequenceDocument) {
                 // Keep track of which document should receive all touch events
                 // in the active sequence. This must be a single document to
                 // ensure we don't leak Nodes between documents.
                 m_touchSequenceDocument = &(result.innerNode()->document());
                 ASSERT(m_touchSequenceDocument->frame()->view());
             }
 
+            // If it is the first TouchPressed we have seen so far, we will consider it primary.
+            if (!m_primaryPointerId)
+                m_primaryPointerId = point.id();
+
             // Ideally we'd ASSERT(!m_targetForTouchID.contains(point.id())
             // since we shouldn't get a touchstart for a touch that's already
             // down. However EventSender allows this to be violated and there's
             // some tests that take advantage of it. There may also be edge
             // cases in the browser where this happens.
             // See http://crbug.com/345372.
             m_targetForTouchID.set(point.id(), node);
 
             TouchAction effectiveTouchAction = computeEffectiveTouchAction(*node);
             if (effectiveTouchAction != TouchActionAuto)
                 m_frame->page()->chrome().client().setTouchAction(effectiveTouchAction);
         }
     }
 
     m_touchPressed = !allTouchReleased;
 
+    unsigned lastPrimaryPointerId = m_primaryPointerId;
+    if (allTouchReleased)
+        m_primaryPointerId = 0;
+
     // If there's no document receiving touch events, or no handlers on the
     // document set to receive the events, then we can skip all the rest of
     // this work.
     if (!m_touchSequenceDocument || !m_touchSequenceDocument->frameHost() || !m_touchSequenceDocument->frameHost()->eventHandlerRegistry().hasEventHandlers(EventHandlerRegistry::TouchEvent) || !m_touchSequenceDocument->frame()) {
         if (allTouchReleased) {
             m_touchSequenceDocument.clear();
             m_touchSequenceUserGestureToken.clear();
         }
         return false;
     }
@@ skipping 14 matching lines @@
     // Array of touches per state, used to assemble the 'changedTouches' list.
     using EventTargetSet = WillBeHeapHashSet<RefPtrWillBeMember<EventTarget>>;
     struct {
         // The touches corresponding to the particular change state this struct
         // instance represents.
         RefPtrWillBeMember<TouchList> m_touches;
         // Set of targets involved in m_touches.
         EventTargetSet m_targets;
     } changedTouches[PlatformTouchPoint::TouchStateEnd];
 
-    for (i = 0; i < points.size(); ++i) {
+    for (unsigned i = 0; i < points.size(); ++i) {
         const PlatformTouchPoint& point = points[i];
         PlatformTouchPoint::State pointState = point.state();
         RefPtrWillBeRawPtr<EventTarget> touchTarget = nullptr;
 
         if (pointState == PlatformTouchPoint::TouchReleased || pointState == PlatformTouchPoint::TouchCancelled) {
             // The target should be the original target for this touch, so get
             // it from the hashmap. As it's a release or cancel we also remove
             // it from the map.
             touchTarget = m_targetForTouchID.take(point.id());
         } else {
@@ skipping 72 matching lines @@
                 changedTouches[pointState].m_touches = TouchList::create();
             changedTouches[pointState].m_touches->append(touch);
             changedTouches[pointState].m_targets.add(touchTarget);
         }
     }
     if (allTouchReleased) {
         m_touchSequenceDocument.clear();
         m_touchSequenceUserGestureToken.clear();
     }
 
+    bool swallowedEvent = false;
+
+    if (RuntimeEnabledFeatures::pointerEventEnabled()) {
+        // Iterate the changedTouches list and m_targets within it, sending PointerEvents
+        // to the targets as required.
+        for (unsigned state = 0; state != PlatformTouchPoint::TouchStateEnd; ++state) {
+            if (!changedTouches[state].m_touches)
+                continue;
+
+            const AtomicString& eventName(pointerEventNameForTouchPointState(static_cast<PlatformTouchPoint::State>(state)));
+            const EventTargetSet& targetsForState = changedTouches[state].m_targets;
+
+            for (const RefPtrWillBeMember<EventTarget>& eventTarget : targetsForState) {
+                EventTarget* pointerEventTarget = eventTarget.get();
+                TouchList* touchesForTarget = touchesByTarget.get(pointerEventTarget);
+                for (unsigned i = 0; i < touchesForTarget->length(); i++) {
+                    Touch* touch = touchesForTarget->item(i);
+
+                    PointerEventInit pointerEventInit;
+                    pointerEventInit.setPointerId(touch->identifier());
+                    pointerEventInit.setWidth(touch->radiusX());
+                    pointerEventInit.setHeight(touch->radiusY());
+                    pointerEventInit.setPressure(touch->force());
+                    pointerEventInit.setTiltX(0.0);
+                    pointerEventInit.setTiltY(0.0);
+                    pointerEventInit.setPointerType(eventName);
+                    pointerEventInit.setIsPrimary(lastPrimaryPointerId == touch->identifier());
+
+                    RefPtrWillBeRawPtr<PointerEvent> pointerEvent = PointerEvent::create(eventName, pointerEventInit);
+                    pointerEventTarget->toNode()->dispatchPointerEvent(pointerEvent.get());
+                    swallowedEvent = swallowedEvent || pointerEvent->defaultPrevented() || pointerEvent->defaultHandled();
+                }
+            }
+        }
+
+        // Skip firing TouchEvent's if any PointerEvent was consumed.
+        if (swallowedEvent)
+            return true;
+    }
+
     // Now iterate the changedTouches list and m_targets within it, sending
-    // events to the targets as required.
-    bool swallowedEvent = false;
+    // TouchEvents to the targets as required.
     for (unsigned state = 0; state != PlatformTouchPoint::TouchStateEnd; ++state) {
         if (!changedTouches[state].m_touches)
             continue;
 
-        const AtomicString& stateName(eventNameForTouchPointState(static_cast<PlatformTouchPoint::State>(state)));
+        const AtomicString& eventName(touchEventNameForTouchPointState(static_cast<PlatformTouchPoint::State>(state)));
         const EventTargetSet& targetsForState = changedTouches[state].m_targets;
         for (const RefPtrWillBeMember<EventTarget>& eventTarget : targetsForState) {
             EventTarget* touchEventTarget = eventTarget.get();
             RefPtrWillBeRawPtr<TouchEvent> touchEvent = TouchEvent::create(
                 touches.get(), touchesByTarget.get(touchEventTarget), changedTouches[state].m_touches.get(),
-                stateName, touchEventTarget->toNode()->document().domWindow(),
+                eventName, touchEventTarget->toNode()->document().domWindow(),
                 event.ctrlKey(), event.altKey(), event.shiftKey(), event.metaKey(), event.cancelable(), event.causesScrollingIfUncanceled(), event.timestamp());
             touchEventTarget->toNode()->dispatchTouchEvent(touchEvent.get());
             swallowedEvent = swallowedEvent || touchEvent->defaultPrevented() || touchEvent->defaultHandled();
         }
     }
 
     return swallowedEvent;
 }
 
 TouchAction EventHandler::intersectTouchAction(TouchAction action1, TouchAction action2)
@@ skipping 111 matching lines @@
 unsigned EventHandler::accessKeyModifiers()
 {
 #if OS(MACOSX)
     return PlatformEvent::CtrlKey | PlatformEvent::AltKey;
 #else
     return PlatformEvent::AltKey;
 #endif
 }
 
 } // namespace blink