diff -r 000000000000 -r 6474c204b198 dom/events/TouchEvent.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/events/TouchEvent.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,257 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/dom/TouchEvent.h"
+#include "mozilla/dom/Touch.h"
+#include "mozilla/dom/TouchListBinding.h"
+#include "mozilla/Preferences.h"
+#include "mozilla/TouchEvents.h"
+#include "nsContentUtils.h"
+
+namespace mozilla {
+
+#ifdef XP_WIN
+namespace widget {
+extern int32_t IsTouchDeviceSupportPresent();
+} // namespace widget
+#endif // #ifdef XP_WIN
+
+namespace dom {
+
+/******************************************************************************
+ * TouchList
+ *****************************************************************************/
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(TouchList)
+  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
+  NS_INTERFACE_MAP_ENTRY(nsISupports)
+NS_INTERFACE_MAP_END
+
+NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_2(TouchList, mParent, mPoints)
+
+NS_IMPL_CYCLE_COLLECTING_ADDREF(TouchList)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(TouchList)
+
+JSObject*
+TouchList::WrapObject(JSContext* aCx)
+{
+  return TouchListBinding::Wrap(aCx, this);
+}
+
+// static
+bool
+TouchList::PrefEnabled(JSContext* aCx, JSObject* aGlobal)
+{
+  return TouchEvent::PrefEnabled(aCx, aGlobal);
+}
+
+Touch*
+TouchList::IdentifiedTouch(int32_t aIdentifier) const
+{
+  for (uint32_t i = 0; i < mPoints.Length(); ++i) {
+    Touch* point = mPoints[i];
+    if (point && point->Identifier() == aIdentifier) {
+      return point;
+    }
+  }
+  return nullptr;
+}
+
+/******************************************************************************
+ * TouchEvent
+ *****************************************************************************/
+
+TouchEvent::TouchEvent(EventTarget* aOwner,
+                       nsPresContext* aPresContext,
+                       WidgetTouchEvent* aEvent)
+  : UIEvent(aOwner, aPresContext,
+            aEvent ? aEvent : new WidgetTouchEvent(false, 0, nullptr))
+{
+  if (aEvent) {
+    mEventIsInternal = false;
+
+    for (uint32_t i = 0; i < aEvent->touches.Length(); ++i) {
+      Touch* touch = aEvent->touches[i];
+      touch->InitializePoints(mPresContext, aEvent);
+    }
+  } else {
+    mEventIsInternal = true;
+    mEvent->time = PR_Now();
+  }
+}
+
+NS_IMPL_CYCLE_COLLECTION_INHERITED(TouchEvent, UIEvent,
+                                   mTouches,
+                                   mTargetTouches,
+                                   mChangedTouches)
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(TouchEvent)
+NS_INTERFACE_MAP_END_INHERITING(UIEvent)
+
+NS_IMPL_ADDREF_INHERITED(TouchEvent, UIEvent)
+NS_IMPL_RELEASE_INHERITED(TouchEvent, UIEvent)
+
+void
+TouchEvent::InitTouchEvent(const nsAString& aType,
+                           bool aCanBubble,
+                           bool aCancelable,
+                           nsIDOMWindow* aView,
+                           int32_t aDetail,
+                           bool aCtrlKey,
+                           bool aAltKey,
+                           bool aShiftKey,
+                           bool aMetaKey,
+                           TouchList* aTouches,
+                           TouchList* aTargetTouches,
+                           TouchList* aChangedTouches,
+                           ErrorResult& aRv)
+{
+  aRv = UIEvent::InitUIEvent(aType, aCanBubble, aCancelable, aView, aDetail);
+  if (aRv.Failed()) {
+    return;
+  }
+
+  mEvent->AsInputEvent()->InitBasicModifiers(aCtrlKey, aAltKey,
+                                             aShiftKey, aMetaKey);
+  mTouches = aTouches;
+  mTargetTouches = aTargetTouches;
+  mChangedTouches = aChangedTouches;
+}
+
+TouchList*
+TouchEvent::Touches()
+{
+  if (!mTouches) {
+    WidgetTouchEvent* touchEvent = mEvent->AsTouchEvent();
+    if (mEvent->message == NS_TOUCH_END || mEvent->message == NS_TOUCH_CANCEL) {
+      // for touchend events, remove any changed touches from the touches array
+      nsTArray< nsRefPtr<Touch> > unchangedTouches;
+      const nsTArray< nsRefPtr<Touch> >& touches = touchEvent->touches;
+      for (uint32_t i = 0; i < touches.Length(); ++i) {
+        if (!touches[i]->mChanged) {
+          unchangedTouches.AppendElement(touches[i]);
+        }
+      }
+      mTouches = new TouchList(ToSupports(this), unchangedTouches);
+    } else {
+      mTouches = new TouchList(ToSupports(this), touchEvent->touches);
+    }
+  }
+  return mTouches;
+}
+
+TouchList*
+TouchEvent::TargetTouches()
+{
+  if (!mTargetTouches) {
+    nsTArray< nsRefPtr<Touch> > targetTouches;
+    WidgetTouchEvent* touchEvent = mEvent->AsTouchEvent();
+    const nsTArray< nsRefPtr<Touch> >& touches = touchEvent->touches;
+    for (uint32_t i = 0; i < touches.Length(); ++i) {
+      // for touchend/cancel events, don't append to the target list if this is a
+      // touch that is ending
+      if ((mEvent->message != NS_TOUCH_END &&
+           mEvent->message != NS_TOUCH_CANCEL) || !touches[i]->mChanged) {
+        if (touches[i]->mTarget == mEvent->originalTarget) {
+          targetTouches.AppendElement(touches[i]);
+        }
+      }
+    }
+    mTargetTouches = new TouchList(ToSupports(this), targetTouches);
+  }
+  return mTargetTouches;
+}
+
+TouchList*
+TouchEvent::ChangedTouches()
+{
+  if (!mChangedTouches) {
+    nsTArray< nsRefPtr<Touch> > changedTouches;
+    WidgetTouchEvent* touchEvent = mEvent->AsTouchEvent();
+    const nsTArray< nsRefPtr<Touch> >& touches = touchEvent->touches;
+    for (uint32_t i = 0; i < touches.Length(); ++i) {
+      if (touches[i]->mChanged) {
+        changedTouches.AppendElement(touches[i]);
+      }
+    }
+    mChangedTouches = new TouchList(ToSupports(this), changedTouches);
+  }
+  return mChangedTouches;
+}
+
+// static
+bool
+TouchEvent::PrefEnabled(JSContext* aCx, JSObject* aGlobal)
+{
+  bool prefValue = false;
+  int32_t flag = 0;
+  if (NS_SUCCEEDED(Preferences::GetInt("dom.w3c_touch_events.enabled",
+                                        &flag))) {
+    if (flag == 2) {
+#ifdef XP_WIN
+      static bool sDidCheckTouchDeviceSupport = false;
+      static bool sIsTouchDeviceSupportPresent = false;
+      // On Windows we auto-detect based on device support.
+      if (!sDidCheckTouchDeviceSupport) {
+        sDidCheckTouchDeviceSupport = true;
+        sIsTouchDeviceSupportPresent = widget::IsTouchDeviceSupportPresent();
+      }
+      prefValue = sIsTouchDeviceSupportPresent;
+#else
+      NS_WARNING("dom.w3c_touch_events.enabled=2 not implemented!");
+      prefValue = false;
+#endif
+    } else {
+      prefValue = !!flag;
+    }
+  }
+  if (prefValue) {
+    nsContentUtils::InitializeTouchEventTable();
+  }
+  return prefValue;
+}
+
+bool
+TouchEvent::AltKey()
+{
+  return mEvent->AsTouchEvent()->IsAlt();
+}
+
+bool
+TouchEvent::MetaKey()
+{
+  return mEvent->AsTouchEvent()->IsMeta();
+}
+
+bool
+TouchEvent::CtrlKey()
+{
+  return mEvent->AsTouchEvent()->IsControl();
+}
+
+bool
+TouchEvent::ShiftKey()
+{
+  return mEvent->AsTouchEvent()->IsShift();
+}
+
+} // namespace dom
+} // namespace mozilla
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+nsresult
+NS_NewDOMTouchEvent(nsIDOMEvent** aInstancePtrResult,
+                    EventTarget* aOwner,
+                    nsPresContext* aPresContext,
+                    WidgetTouchEvent* aEvent)
+{
+  TouchEvent* it = new TouchEvent(aOwner, aPresContext, aEvent);
+  NS_ADDREF(it);
+  *aInstancePtrResult = static_cast<Event*>(it);
+  return NS_OK;
+}