Add m-esr52 at 52.6.0

1 files changed, 303 insertions, 0 deletions

diff --git a/dom/events/TouchEvent.cpp b/dom/events/TouchEvent.cpp
new file mode 100644
index 000000000..cc9684eb3
--- /dev/null
+++ b/dom/events/TouchEvent.cpp
@@ -0,0 +1,303 @@
+/* -*- 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/Navigator.h"
+#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"
+#include "nsIDocShell.h"
+#include "mozilla/WidgetUtils.h"
+
+namespace mozilla {
+
+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(TouchList, mParent, mPoints)
+
+NS_IMPL_CYCLE_COLLECTING_ADDREF(TouchList)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(TouchList)
+
+JSObject*
+TouchList::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
+{
+  return TouchListBinding::Wrap(aCx, this, aGivenProto);
+}
+
+// static
+bool
+TouchList::PrefEnabled(JSContext* aCx, JSObject* aGlobal)
+{
+  return TouchEvent::PrefEnabled(aCx, aGlobal);
+}
+
+/******************************************************************************
+ * TouchEvent
+ *****************************************************************************/
+
+TouchEvent::TouchEvent(EventTarget* aOwner,
+                       nsPresContext* aPresContext,
+                       WidgetTouchEvent* aEvent)
+  : UIEvent(aOwner, aPresContext,
+            aEvent ? aEvent :
+                     new WidgetTouchEvent(false, eVoidEvent, nullptr))
+{
+  if (aEvent) {
+    mEventIsInternal = false;
+
+    for (uint32_t i = 0; i < aEvent->mTouches.Length(); ++i) {
+      Touch* touch = aEvent->mTouches[i];
+      touch->InitializePoints(mPresContext, aEvent);
+    }
+  } else {
+    mEventIsInternal = true;
+    mEvent->mTime = 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,
+                           nsGlobalWindow* aView,
+                           int32_t aDetail,
+                           bool aCtrlKey,
+                           bool aAltKey,
+                           bool aShiftKey,
+                           bool aMetaKey,
+                           TouchList* aTouches,
+                           TouchList* aTargetTouches,
+                           TouchList* aChangedTouches)
+{
+  NS_ENSURE_TRUE_VOID(!mEvent->mFlags.mIsBeingDispatched);
+
+  UIEvent::InitUIEvent(aType, aCanBubble, aCancelable, aView, aDetail);
+  mEvent->AsInputEvent()->InitBasicModifiers(aCtrlKey, aAltKey,
+                                             aShiftKey, aMetaKey);
+  mTouches = aTouches;
+  mTargetTouches = aTargetTouches;
+  mChangedTouches = aChangedTouches;
+}
+
+TouchList*
+TouchEvent::Touches()
+{
+  if (!mTouches) {
+    WidgetTouchEvent* touchEvent = mEvent->AsTouchEvent();
+    if (mEvent->mMessage == eTouchEnd || mEvent->mMessage == eTouchCancel) {
+      // for touchend events, remove any changed touches from mTouches
+      WidgetTouchEvent::AutoTouchArray unchangedTouches;
+      const WidgetTouchEvent::TouchArray& touches = touchEvent->mTouches;
+      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->mTouches);
+    }
+  }
+  return mTouches;
+}
+
+TouchList*
+TouchEvent::TargetTouches()
+{
+  if (!mTargetTouches) {
+    WidgetTouchEvent::AutoTouchArray targetTouches;
+    WidgetTouchEvent* touchEvent = mEvent->AsTouchEvent();
+    const WidgetTouchEvent::TouchArray& touches = touchEvent->mTouches;
+    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->mMessage != eTouchEnd && mEvent->mMessage != eTouchCancel) ||
+          !touches[i]->mChanged) {
+        if (touches[i]->mTarget == mEvent->mOriginalTarget) {
+          targetTouches.AppendElement(touches[i]);
+        }
+      }
+    }
+    mTargetTouches = new TouchList(ToSupports(this), targetTouches);
+  }
+  return mTargetTouches;
+}
+
+TouchList*
+TouchEvent::ChangedTouches()
+{
+  if (!mChangedTouches) {
+    WidgetTouchEvent::AutoTouchArray changedTouches;
+    WidgetTouchEvent* touchEvent = mEvent->AsTouchEvent();
+    const WidgetTouchEvent::TouchArray& touches = touchEvent->mTouches;
+    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)
+{
+  nsIDocShell* docShell = nullptr;
+  if (aGlobal) {
+    nsGlobalWindow* win = xpc::WindowOrNull(aGlobal);
+    if (win) {
+      docShell = win->GetDocShell();
+    }
+  }
+  return PrefEnabled(docShell);
+}
+
+// static
+bool
+TouchEvent::PrefEnabled(nsIDocShell* aDocShell)
+{
+  static bool sPrefCached = false;
+  static int32_t sPrefCacheValue = 0;
+
+  uint32_t touchEventsOverride = nsIDocShell::TOUCHEVENTS_OVERRIDE_NONE;
+  if (aDocShell) {
+    aDocShell->GetTouchEventsOverride(&touchEventsOverride);
+  }
+
+  if (!sPrefCached) {
+    sPrefCached = true;
+    Preferences::AddIntVarCache(&sPrefCacheValue, "dom.w3c_touch_events.enabled");
+  }
+
+  bool enabled = false;
+  if (touchEventsOverride == nsIDocShell::TOUCHEVENTS_OVERRIDE_ENABLED) {
+    enabled = true;
+  } else if (touchEventsOverride == nsIDocShell::TOUCHEVENTS_OVERRIDE_DISABLED) {
+    enabled = false;
+  } else {
+    if (sPrefCacheValue == 2) {
+#if defined(MOZ_B2G) || defined(MOZ_WIDGET_ANDROID)
+      // Touch support is always enabled on B2G and android.
+      enabled = true;
+#elif defined(XP_WIN) || MOZ_WIDGET_GTK == 3
+      static bool sDidCheckTouchDeviceSupport = false;
+      static bool sIsTouchDeviceSupportPresent = false;
+      // On Windows and GTK3 we auto-detect based on device support.
+      if (!sDidCheckTouchDeviceSupport) {
+        sDidCheckTouchDeviceSupport = true;
+        sIsTouchDeviceSupportPresent = WidgetUtils::IsTouchDeviceSupportPresent();
+      }
+      enabled = sIsTouchDeviceSupportPresent;
+#else
+      enabled = false;
+#endif
+    } else {
+      enabled = !!sPrefCacheValue;
+    }
+  }
+
+  if (enabled) {
+    nsContentUtils::InitializeTouchEventTable();
+  }
+  return enabled;
+}
+
+// static
+already_AddRefed<Event>
+TouchEvent::Constructor(const GlobalObject& aGlobal,
+                        const nsAString& aType,
+                        const TouchEventInit& aParam,
+                        ErrorResult& aRv)
+{
+  nsCOMPtr<EventTarget> t = do_QueryInterface(aGlobal.GetAsSupports());
+  RefPtr<TouchEvent> e = new TouchEvent(t, nullptr, nullptr);
+  bool trusted = e->Init(t);
+  RefPtr<TouchList> touches = e->CopyTouches(aParam.mTouches);
+  RefPtr<TouchList> targetTouches = e->CopyTouches(aParam.mTargetTouches);
+  RefPtr<TouchList> changedTouches = e->CopyTouches(aParam.mChangedTouches);
+  e->InitTouchEvent(aType, aParam.mBubbles, aParam.mCancelable, aParam.mView,
+                    aParam.mDetail, aParam.mCtrlKey, aParam.mAltKey,
+                    aParam.mShiftKey, aParam.mMetaKey, touches, targetTouches,
+                    changedTouches);
+  e->SetTrusted(trusted);
+  e->SetComposed(aParam.mComposed);
+  return e.forget();
+}
+
+
+already_AddRefed<TouchList>
+TouchEvent::CopyTouches(const Sequence<OwningNonNull<Touch>>& aTouches)
+{
+  RefPtr<TouchList> list = new TouchList(GetParentObject());
+  size_t len = aTouches.Length();
+  for (size_t i = 0; i < len; ++i) {
+    list->Append(aTouches[i]);
+  }
+  return list.forget();
+}
+
+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;
+
+already_AddRefed<TouchEvent>
+NS_NewDOMTouchEvent(EventTarget* aOwner,
+                    nsPresContext* aPresContext,
+                    WidgetTouchEvent* aEvent)
+{
+  RefPtr<TouchEvent> it = new TouchEvent(aOwner, aPresContext, aEvent);
+  return it.forget();
+}