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-rw-r--r--dom/events/UIEvent.cpp512
1 files changed, 512 insertions, 0 deletions
diff --git a/dom/events/UIEvent.cpp b/dom/events/UIEvent.cpp
new file mode 100644
index 000000000..561bf4a26
--- /dev/null
+++ b/dom/events/UIEvent.cpp
@@ -0,0 +1,512 @@
+/* -*- 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 "base/basictypes.h"
+#include "ipc/IPCMessageUtils.h"
+#include "mozilla/dom/UIEvent.h"
+#include "mozilla/ArrayUtils.h"
+#include "mozilla/Assertions.h"
+#include "mozilla/ContentEvents.h"
+#include "mozilla/EventStateManager.h"
+#include "mozilla/TextEvents.h"
+#include "nsCOMPtr.h"
+#include "nsContentUtils.h"
+#include "nsIContent.h"
+#include "nsIInterfaceRequestorUtils.h"
+#include "nsIDocShell.h"
+#include "nsIDOMWindow.h"
+#include "nsIDOMNode.h"
+#include "nsIFrame.h"
+#include "prtime.h"
+
+namespace mozilla {
+namespace dom {
+
+UIEvent::UIEvent(EventTarget* aOwner,
+ nsPresContext* aPresContext,
+ WidgetGUIEvent* aEvent)
+ : Event(aOwner, aPresContext,
+ aEvent ? aEvent : new InternalUIEvent(false, eVoidEvent, nullptr))
+ , mClientPoint(0, 0)
+ , mLayerPoint(0, 0)
+ , mPagePoint(0, 0)
+ , mMovementPoint(0, 0)
+ , mIsPointerLocked(EventStateManager::sIsPointerLocked)
+ , mLastClientPoint(EventStateManager::sLastClientPoint)
+{
+ if (aEvent) {
+ mEventIsInternal = false;
+ }
+ else {
+ mEventIsInternal = true;
+ mEvent->mTime = PR_Now();
+ }
+
+ // Fill mDetail and mView according to the mEvent (widget-generated
+ // event) we've got
+ switch(mEvent->mClass) {
+ case eUIEventClass:
+ {
+ mDetail = mEvent->AsUIEvent()->mDetail;
+ break;
+ }
+
+ case eScrollPortEventClass:
+ {
+ InternalScrollPortEvent* scrollEvent = mEvent->AsScrollPortEvent();
+ mDetail = static_cast<int32_t>(scrollEvent->mOrient);
+ break;
+ }
+
+ default:
+ mDetail = 0;
+ break;
+ }
+
+ mView = nullptr;
+ if (mPresContext)
+ {
+ nsIDocShell* docShell = mPresContext->GetDocShell();
+ if (docShell)
+ {
+ mView = docShell->GetWindow();
+ }
+ }
+}
+
+// static
+already_AddRefed<UIEvent>
+UIEvent::Constructor(const GlobalObject& aGlobal,
+ const nsAString& aType,
+ const UIEventInit& aParam,
+ ErrorResult& aRv)
+{
+ nsCOMPtr<EventTarget> t = do_QueryInterface(aGlobal.GetAsSupports());
+ RefPtr<UIEvent> e = new UIEvent(t, nullptr, nullptr);
+ bool trusted = e->Init(t);
+ e->InitUIEvent(aType, aParam.mBubbles, aParam.mCancelable, aParam.mView,
+ aParam.mDetail);
+ e->SetTrusted(trusted);
+ e->SetComposed(aParam.mComposed);
+ return e.forget();
+}
+
+NS_IMPL_CYCLE_COLLECTION_INHERITED(UIEvent, Event,
+ mView)
+
+NS_IMPL_ADDREF_INHERITED(UIEvent, Event)
+NS_IMPL_RELEASE_INHERITED(UIEvent, Event)
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(UIEvent)
+ NS_INTERFACE_MAP_ENTRY(nsIDOMUIEvent)
+NS_INTERFACE_MAP_END_INHERITING(Event)
+
+static nsIntPoint
+DevPixelsToCSSPixels(const LayoutDeviceIntPoint& aPoint,
+ nsPresContext* aContext)
+{
+ return nsIntPoint(aContext->DevPixelsToIntCSSPixels(aPoint.x),
+ aContext->DevPixelsToIntCSSPixels(aPoint.y));
+}
+
+nsIntPoint
+UIEvent::GetMovementPoint()
+{
+ if (mPrivateDataDuplicated || mEventIsInternal) {
+ return mMovementPoint;
+ }
+
+ if (!mEvent ||
+ (mEvent->mClass != eMouseEventClass &&
+ mEvent->mClass != eMouseScrollEventClass &&
+ mEvent->mClass != eWheelEventClass &&
+ mEvent->mClass != eDragEventClass &&
+ mEvent->mClass != ePointerEventClass &&
+ mEvent->mClass != eSimpleGestureEventClass) ||
+ !mEvent->AsGUIEvent()->mWidget) {
+ return nsIntPoint(0, 0);
+ }
+
+ // Calculate the delta between the last screen point and the current one.
+ nsIntPoint current = DevPixelsToCSSPixels(mEvent->mRefPoint, mPresContext);
+ nsIntPoint last = DevPixelsToCSSPixels(mEvent->mLastRefPoint, mPresContext);
+ return current - last;
+}
+
+NS_IMETHODIMP
+UIEvent::GetView(mozIDOMWindowProxy** aView)
+{
+ *aView = mView;
+ NS_IF_ADDREF(*aView);
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+UIEvent::GetDetail(int32_t* aDetail)
+{
+ *aDetail = mDetail;
+ return NS_OK;
+}
+
+void
+UIEvent::InitUIEvent(const nsAString& typeArg,
+ bool canBubbleArg,
+ bool cancelableArg,
+ nsGlobalWindow* viewArg,
+ int32_t detailArg)
+{
+ auto* view = viewArg ? viewArg->AsInner() : nullptr;
+ InitUIEvent(typeArg, canBubbleArg, cancelableArg, view, detailArg);
+}
+
+NS_IMETHODIMP
+UIEvent::InitUIEvent(const nsAString& typeArg,
+ bool canBubbleArg,
+ bool cancelableArg,
+ mozIDOMWindow* viewArg,
+ int32_t detailArg)
+{
+ NS_ENSURE_TRUE(!mEvent->mFlags.mIsBeingDispatched, NS_OK);
+
+ Event::InitEvent(typeArg, canBubbleArg, cancelableArg);
+
+ mDetail = detailArg;
+ mView = viewArg ? nsPIDOMWindowInner::From(viewArg)->GetOuterWindow() :
+ nullptr;
+
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+UIEvent::GetPageX(int32_t* aPageX)
+{
+ NS_ENSURE_ARG_POINTER(aPageX);
+ *aPageX = PageX();
+ return NS_OK;
+}
+
+int32_t
+UIEvent::PageX() const
+{
+ if (mPrivateDataDuplicated) {
+ return mPagePoint.x;
+ }
+
+ return Event::GetPageCoords(mPresContext, mEvent, mEvent->mRefPoint,
+ mClientPoint).x;
+}
+
+NS_IMETHODIMP
+UIEvent::GetPageY(int32_t* aPageY)
+{
+ NS_ENSURE_ARG_POINTER(aPageY);
+ *aPageY = PageY();
+ return NS_OK;
+}
+
+int32_t
+UIEvent::PageY() const
+{
+ if (mPrivateDataDuplicated) {
+ return mPagePoint.y;
+ }
+
+ return Event::GetPageCoords(mPresContext, mEvent, mEvent->mRefPoint,
+ mClientPoint).y;
+}
+
+NS_IMETHODIMP
+UIEvent::GetWhich(uint32_t* aWhich)
+{
+ NS_ENSURE_ARG_POINTER(aWhich);
+ *aWhich = Which();
+ return NS_OK;
+}
+
+already_AddRefed<nsINode>
+UIEvent::GetRangeParent()
+{
+ nsIFrame* targetFrame = nullptr;
+
+ if (mPresContext) {
+ targetFrame = mPresContext->EventStateManager()->GetEventTarget();
+ }
+
+ if (targetFrame) {
+ nsPoint pt = nsLayoutUtils::GetEventCoordinatesRelativeTo(mEvent,
+ targetFrame);
+ nsCOMPtr<nsIContent> parent = targetFrame->GetContentOffsetsFromPoint(pt).content;
+ if (parent) {
+ if (parent->ChromeOnlyAccess() &&
+ !nsContentUtils::CanAccessNativeAnon()) {
+ return nullptr;
+ }
+ return parent.forget();
+ }
+ }
+
+ return nullptr;
+}
+
+NS_IMETHODIMP
+UIEvent::GetRangeParent(nsIDOMNode** aRangeParent)
+{
+ NS_ENSURE_ARG_POINTER(aRangeParent);
+ *aRangeParent = nullptr;
+ nsCOMPtr<nsINode> n = GetRangeParent();
+ if (n) {
+ CallQueryInterface(n, aRangeParent);
+ }
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+UIEvent::GetRangeOffset(int32_t* aRangeOffset)
+{
+ NS_ENSURE_ARG_POINTER(aRangeOffset);
+ *aRangeOffset = RangeOffset();
+ return NS_OK;
+}
+
+int32_t
+UIEvent::RangeOffset() const
+{
+ if (!mPresContext) {
+ return 0;
+ }
+
+ nsIFrame* targetFrame = mPresContext->EventStateManager()->GetEventTarget();
+ if (!targetFrame) {
+ return 0;
+ }
+
+ nsPoint pt = nsLayoutUtils::GetEventCoordinatesRelativeTo(mEvent,
+ targetFrame);
+ return targetFrame->GetContentOffsetsFromPoint(pt).offset;
+}
+
+nsIntPoint
+UIEvent::GetLayerPoint() const
+{
+ if (!mEvent ||
+ (mEvent->mClass != eMouseEventClass &&
+ mEvent->mClass != eMouseScrollEventClass &&
+ mEvent->mClass != eWheelEventClass &&
+ mEvent->mClass != ePointerEventClass &&
+ mEvent->mClass != eTouchEventClass &&
+ mEvent->mClass != eDragEventClass &&
+ mEvent->mClass != eSimpleGestureEventClass) ||
+ !mPresContext ||
+ mEventIsInternal) {
+ return mLayerPoint;
+ }
+ // XXX I'm not really sure this is correct; it's my best shot, though
+ nsIFrame* targetFrame = mPresContext->EventStateManager()->GetEventTarget();
+ if (!targetFrame)
+ return mLayerPoint;
+ nsIFrame* layer = nsLayoutUtils::GetClosestLayer(targetFrame);
+ nsPoint pt(nsLayoutUtils::GetEventCoordinatesRelativeTo(mEvent, layer));
+ return nsIntPoint(nsPresContext::AppUnitsToIntCSSPixels(pt.x),
+ nsPresContext::AppUnitsToIntCSSPixels(pt.y));
+}
+
+NS_IMETHODIMP
+UIEvent::GetLayerX(int32_t* aLayerX)
+{
+ NS_ENSURE_ARG_POINTER(aLayerX);
+ *aLayerX = GetLayerPoint().x;
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+UIEvent::GetLayerY(int32_t* aLayerY)
+{
+ NS_ENSURE_ARG_POINTER(aLayerY);
+ *aLayerY = GetLayerPoint().y;
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+UIEvent::GetIsChar(bool* aIsChar)
+{
+ *aIsChar = IsChar();
+ return NS_OK;
+}
+
+bool
+UIEvent::IsChar() const
+{
+ WidgetKeyboardEvent* keyEvent = mEvent->AsKeyboardEvent();
+ return keyEvent ? keyEvent->mIsChar : false;
+}
+
+mozilla::dom::Event*
+UIEvent::AsEvent(void)
+{
+ return this;
+}
+
+NS_IMETHODIMP
+UIEvent::DuplicatePrivateData()
+{
+ mClientPoint =
+ Event::GetClientCoords(mPresContext, mEvent, mEvent->mRefPoint,
+ mClientPoint);
+ mMovementPoint = GetMovementPoint();
+ mLayerPoint = GetLayerPoint();
+ mPagePoint =
+ Event::GetPageCoords(mPresContext, mEvent, mEvent->mRefPoint, mClientPoint);
+ // GetScreenPoint converts mEvent->mRefPoint to right coordinates.
+ CSSIntPoint screenPoint =
+ Event::GetScreenCoords(mPresContext, mEvent, mEvent->mRefPoint);
+ nsresult rv = Event::DuplicatePrivateData();
+ if (NS_SUCCEEDED(rv)) {
+ CSSToLayoutDeviceScale scale = mPresContext ? mPresContext->CSSToDevPixelScale()
+ : CSSToLayoutDeviceScale(1);
+ mEvent->mRefPoint = RoundedToInt(screenPoint * scale);
+ }
+ return rv;
+}
+
+NS_IMETHODIMP_(void)
+UIEvent::Serialize(IPC::Message* aMsg, bool aSerializeInterfaceType)
+{
+ if (aSerializeInterfaceType) {
+ IPC::WriteParam(aMsg, NS_LITERAL_STRING("uievent"));
+ }
+
+ Event::Serialize(aMsg, false);
+
+ int32_t detail = 0;
+ GetDetail(&detail);
+ IPC::WriteParam(aMsg, detail);
+}
+
+NS_IMETHODIMP_(bool)
+UIEvent::Deserialize(const IPC::Message* aMsg, PickleIterator* aIter)
+{
+ NS_ENSURE_TRUE(Event::Deserialize(aMsg, aIter), false);
+ NS_ENSURE_TRUE(IPC::ReadParam(aMsg, aIter, &mDetail), false);
+ return true;
+}
+
+// XXX Following struct and array are used only in
+// UIEvent::ComputeModifierState(), but if we define them in it,
+// we fail to build on Mac at calling mozilla::ArrayLength().
+struct ModifierPair
+{
+ Modifier modifier;
+ const char* name;
+};
+static const ModifierPair kPairs[] = {
+ { MODIFIER_ALT, NS_DOM_KEYNAME_ALT },
+ { MODIFIER_ALTGRAPH, NS_DOM_KEYNAME_ALTGRAPH },
+ { MODIFIER_CAPSLOCK, NS_DOM_KEYNAME_CAPSLOCK },
+ { MODIFIER_CONTROL, NS_DOM_KEYNAME_CONTROL },
+ { MODIFIER_FN, NS_DOM_KEYNAME_FN },
+ { MODIFIER_FNLOCK, NS_DOM_KEYNAME_FNLOCK },
+ { MODIFIER_META, NS_DOM_KEYNAME_META },
+ { MODIFIER_NUMLOCK, NS_DOM_KEYNAME_NUMLOCK },
+ { MODIFIER_SCROLLLOCK, NS_DOM_KEYNAME_SCROLLLOCK },
+ { MODIFIER_SHIFT, NS_DOM_KEYNAME_SHIFT },
+ { MODIFIER_SYMBOL, NS_DOM_KEYNAME_SYMBOL },
+ { MODIFIER_SYMBOLLOCK, NS_DOM_KEYNAME_SYMBOLLOCK },
+ { MODIFIER_OS, NS_DOM_KEYNAME_OS }
+};
+
+// static
+Modifiers
+UIEvent::ComputeModifierState(const nsAString& aModifiersList)
+{
+ if (aModifiersList.IsEmpty()) {
+ return 0;
+ }
+
+ // Be careful about the performance. If aModifiersList is too long,
+ // parsing it needs too long time.
+ // XXX Should we abort if aModifiersList is too long?
+
+ Modifiers modifiers = 0;
+
+ nsAString::const_iterator listStart, listEnd;
+ aModifiersList.BeginReading(listStart);
+ aModifiersList.EndReading(listEnd);
+
+ for (uint32_t i = 0; i < ArrayLength(kPairs); i++) {
+ nsAString::const_iterator start(listStart), end(listEnd);
+ if (!FindInReadable(NS_ConvertASCIItoUTF16(kPairs[i].name), start, end)) {
+ continue;
+ }
+
+ if ((start != listStart && !NS_IsAsciiWhitespace(*(--start))) ||
+ (end != listEnd && !NS_IsAsciiWhitespace(*(end)))) {
+ continue;
+ }
+ modifiers |= kPairs[i].modifier;
+ }
+
+ return modifiers;
+}
+
+bool
+UIEvent::GetModifierStateInternal(const nsAString& aKey)
+{
+ WidgetInputEvent* inputEvent = mEvent->AsInputEvent();
+ MOZ_ASSERT(inputEvent, "mEvent must be WidgetInputEvent or derived class");
+ return ((inputEvent->mModifiers & WidgetInputEvent::GetModifier(aKey)) != 0);
+}
+
+void
+UIEvent::InitModifiers(const EventModifierInit& aParam)
+{
+ if (NS_WARN_IF(!mEvent)) {
+ return;
+ }
+ WidgetInputEvent* inputEvent = mEvent->AsInputEvent();
+ MOZ_ASSERT(inputEvent,
+ "This method shouldn't be called if it doesn't have modifiers");
+ if (NS_WARN_IF(!inputEvent)) {
+ return;
+ }
+
+ inputEvent->mModifiers = MODIFIER_NONE;
+
+#define SET_MODIFIER(aName, aValue) \
+ if (aParam.m##aName) { \
+ inputEvent->mModifiers |= aValue; \
+ } \
+
+ SET_MODIFIER(CtrlKey, MODIFIER_CONTROL)
+ SET_MODIFIER(ShiftKey, MODIFIER_SHIFT)
+ SET_MODIFIER(AltKey, MODIFIER_ALT)
+ SET_MODIFIER(MetaKey, MODIFIER_META)
+ SET_MODIFIER(ModifierAltGraph, MODIFIER_ALTGRAPH)
+ SET_MODIFIER(ModifierCapsLock, MODIFIER_CAPSLOCK)
+ SET_MODIFIER(ModifierFn, MODIFIER_FN)
+ SET_MODIFIER(ModifierFnLock, MODIFIER_FNLOCK)
+ SET_MODIFIER(ModifierNumLock, MODIFIER_NUMLOCK)
+ SET_MODIFIER(ModifierOS, MODIFIER_OS)
+ SET_MODIFIER(ModifierScrollLock, MODIFIER_SCROLLLOCK)
+ SET_MODIFIER(ModifierSymbol, MODIFIER_SYMBOL)
+ SET_MODIFIER(ModifierSymbolLock, MODIFIER_SYMBOLLOCK)
+
+#undef SET_MODIFIER
+}
+
+} // namespace dom
+} // namespace mozilla
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+already_AddRefed<UIEvent>
+NS_NewDOMUIEvent(EventTarget* aOwner,
+ nsPresContext* aPresContext,
+ WidgetGUIEvent* aEvent)
+{
+ RefPtr<UIEvent> it = new UIEvent(aOwner, aPresContext, aEvent);
+ return it.forget();
+}