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-rw-r--r--dom/events/WheelEvent.cpp147
1 files changed, 147 insertions, 0 deletions
diff --git a/dom/events/WheelEvent.cpp b/dom/events/WheelEvent.cpp
new file mode 100644
index 000000000..de6c9445a
--- /dev/null
+++ b/dom/events/WheelEvent.cpp
@@ -0,0 +1,147 @@
+/* -*- 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/WheelEvent.h"
+#include "mozilla/MouseEvents.h"
+#include "prtime.h"
+
+namespace mozilla {
+namespace dom {
+
+WheelEvent::WheelEvent(EventTarget* aOwner,
+ nsPresContext* aPresContext,
+ WidgetWheelEvent* aWheelEvent)
+ : MouseEvent(aOwner, aPresContext,
+ aWheelEvent ? aWheelEvent :
+ new WidgetWheelEvent(false, eVoidEvent, nullptr))
+ , mAppUnitsPerDevPixel(0)
+{
+ if (aWheelEvent) {
+ mEventIsInternal = false;
+ // If the delta mode is pixel, the WidgetWheelEvent's delta values are in
+ // device pixels. However, JS contents need the delta values in CSS pixels.
+ // We should store the value of mAppUnitsPerDevPixel here because
+ // it might be changed by changing zoom or something.
+ if (aWheelEvent->mDeltaMode == nsIDOMWheelEvent::DOM_DELTA_PIXEL) {
+ mAppUnitsPerDevPixel = aPresContext->AppUnitsPerDevPixel();
+ }
+ } else {
+ mEventIsInternal = true;
+ mEvent->mTime = PR_Now();
+ mEvent->mRefPoint = LayoutDeviceIntPoint(0, 0);
+ mEvent->AsWheelEvent()->inputSource = nsIDOMMouseEvent::MOZ_SOURCE_UNKNOWN;
+ }
+}
+
+NS_IMPL_ADDREF_INHERITED(WheelEvent, MouseEvent)
+NS_IMPL_RELEASE_INHERITED(WheelEvent, MouseEvent)
+
+NS_INTERFACE_MAP_BEGIN(WheelEvent)
+NS_INTERFACE_MAP_END_INHERITING(MouseEvent)
+
+void
+WheelEvent::InitWheelEvent(const nsAString& aType,
+ bool aCanBubble,
+ bool aCancelable,
+ nsGlobalWindow* aView,
+ int32_t aDetail,
+ int32_t aScreenX,
+ int32_t aScreenY,
+ int32_t aClientX,
+ int32_t aClientY,
+ uint16_t aButton,
+ EventTarget* aRelatedTarget,
+ const nsAString& aModifiersList,
+ double aDeltaX,
+ double aDeltaY,
+ double aDeltaZ,
+ uint32_t aDeltaMode)
+{
+ NS_ENSURE_TRUE_VOID(!mEvent->mFlags.mIsBeingDispatched);
+
+ MouseEvent::InitMouseEvent(aType, aCanBubble, aCancelable, aView, aDetail,
+ aScreenX, aScreenY, aClientX, aClientY, aButton,
+ aRelatedTarget, aModifiersList);
+
+ WidgetWheelEvent* wheelEvent = mEvent->AsWheelEvent();
+ wheelEvent->mDeltaX = aDeltaX;
+ wheelEvent->mDeltaY = aDeltaY;
+ wheelEvent->mDeltaZ = aDeltaZ;
+ wheelEvent->mDeltaMode = aDeltaMode;
+}
+
+double
+WheelEvent::DeltaX()
+{
+ if (!mAppUnitsPerDevPixel) {
+ return mEvent->AsWheelEvent()->mDeltaX;
+ }
+ return mEvent->AsWheelEvent()->mDeltaX *
+ mAppUnitsPerDevPixel / nsPresContext::AppUnitsPerCSSPixel();
+}
+
+double
+WheelEvent::DeltaY()
+{
+ if (!mAppUnitsPerDevPixel) {
+ return mEvent->AsWheelEvent()->mDeltaY;
+ }
+ return mEvent->AsWheelEvent()->mDeltaY *
+ mAppUnitsPerDevPixel / nsPresContext::AppUnitsPerCSSPixel();
+}
+
+double
+WheelEvent::DeltaZ()
+{
+ if (!mAppUnitsPerDevPixel) {
+ return mEvent->AsWheelEvent()->mDeltaZ;
+ }
+ return mEvent->AsWheelEvent()->mDeltaZ *
+ mAppUnitsPerDevPixel / nsPresContext::AppUnitsPerCSSPixel();
+}
+
+uint32_t
+WheelEvent::DeltaMode()
+{
+ return mEvent->AsWheelEvent()->mDeltaMode;
+}
+
+already_AddRefed<WheelEvent>
+WheelEvent::Constructor(const GlobalObject& aGlobal,
+ const nsAString& aType,
+ const WheelEventInit& aParam,
+ ErrorResult& aRv)
+{
+ nsCOMPtr<EventTarget> t = do_QueryInterface(aGlobal.GetAsSupports());
+ RefPtr<WheelEvent> e = new WheelEvent(t, nullptr, nullptr);
+ bool trusted = e->Init(t);
+ e->InitWheelEvent(aType, aParam.mBubbles, aParam.mCancelable,
+ aParam.mView, aParam.mDetail,
+ aParam.mScreenX, aParam.mScreenY,
+ aParam.mClientX, aParam.mClientY,
+ aParam.mButton, aParam.mRelatedTarget,
+ EmptyString(), aParam.mDeltaX,
+ aParam.mDeltaY, aParam.mDeltaZ, aParam.mDeltaMode);
+ e->InitializeExtraMouseEventDictionaryMembers(aParam);
+ e->SetTrusted(trusted);
+ e->SetComposed(aParam.mComposed);
+ return e.forget();
+}
+
+} // namespace dom
+} // namespace mozilla
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+already_AddRefed<WheelEvent>
+NS_NewDOMWheelEvent(EventTarget* aOwner,
+ nsPresContext* aPresContext,
+ WidgetWheelEvent* aEvent)
+{
+ RefPtr<WheelEvent> it = new WheelEvent(aOwner, aPresContext, aEvent);
+ return it.forget();
+}