The Tor Browser: dom/events/UIEvent.cpp@b8a032363ba2 (annotated)

dom/events/UIEvent.cpp@b8a032363ba2 (annotated)

dom/events/UIEvent.cpp

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* 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 "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, 0))
   , 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->time = PR_Now();
   }
   // Fill mDetail and mView according to the mEvent (widget-generated
   // event) we've got
   switch(mEvent->eventStructType)
   {
     case NS_UI_EVENT:
     {
       mDetail = mEvent->AsUIEvent()->detail;
       break;
     }
     case NS_SCROLLPORT_EVENT:
     {
       InternalScrollPortEvent* scrollEvent = mEvent->AsScrollPortEvent();
       mDetail = (int32_t)scrollEvent->orient;
       break;
     }
     default:
       mDetail = 0;
       break;
   }
   mView = nullptr;
   if (mPresContext)
   {
     nsISupports* container = mPresContext->GetContainerWeak();
     if (container)
     {
        nsCOMPtr<nsIDOMWindow> window = do_GetInterface(container);
        if (window)
           mView = do_QueryInterface(window);
     }
   }
 }
 // static
 already_AddRefed<UIEvent>
 UIEvent::Constructor(const GlobalObject& aGlobal,
                      const nsAString& aType,
                      const UIEventInit& aParam,
                      ErrorResult& aRv)
 {
   nsCOMPtr<EventTarget> t = do_QueryInterface(aGlobal.GetAsSupports());
   nsRefPtr<UIEvent> e = new UIEvent(t, nullptr, nullptr);
   bool trusted = e->Init(t);
   aRv = e->InitUIEvent(aType, aParam.mBubbles, aParam.mCancelable, aParam.mView,
                        aParam.mDetail);
   e->SetTrusted(trusted);
   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) {
     return mMovementPoint;
   }
   if (!mEvent ||
       (mEvent->eventStructType != NS_MOUSE_EVENT &&
        mEvent->eventStructType != NS_MOUSE_SCROLL_EVENT &&
        mEvent->eventStructType != NS_WHEEL_EVENT &&
        mEvent->eventStructType != NS_DRAG_EVENT &&
        mEvent->eventStructType != NS_POINTER_EVENT &&
        mEvent->eventStructType != NS_SIMPLE_GESTURE_EVENT) ||
        !mEvent->AsGUIEvent()->widget) {
     return nsIntPoint(0, 0);
   }
   // Calculate the delta between the last screen point and the current one.
   nsIntPoint current = DevPixelsToCSSPixels(mEvent->refPoint, mPresContext);
   nsIntPoint last = DevPixelsToCSSPixels(mEvent->lastRefPoint, mPresContext);
   return current - last;
 }
 NS_IMETHODIMP
 UIEvent::GetView(nsIDOMWindow** aView)
 {
   *aView = mView;
   NS_IF_ADDREF(*aView);
   return NS_OK;
 }
 NS_IMETHODIMP
 UIEvent::GetDetail(int32_t* aDetail)
 {
   *aDetail = mDetail;
   return NS_OK;
 }
 NS_IMETHODIMP
 UIEvent::InitUIEvent(const nsAString& typeArg,
                      bool canBubbleArg,
                      bool cancelableArg,
                      nsIDOMWindow* viewArg,
                      int32_t detailArg)
 {
   if (viewArg) {
     nsCOMPtr<nsPIDOMWindow> view = do_QueryInterface(viewArg);
     NS_ENSURE_TRUE(view, NS_ERROR_INVALID_ARG);
   }
   nsresult rv = Event::InitEvent(typeArg, canBubbleArg, cancelableArg);
   NS_ENSURE_SUCCESS(rv, rv);
   mDetail = detailArg;
   mView = viewArg;
   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->refPoint,
                               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->refPoint,
                               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;
 }
 NS_IMETHODIMP
 UIEvent::GetCancelBubble(bool* aCancelBubble)
 {
   NS_ENSURE_ARG_POINTER(aCancelBubble);
   *aCancelBubble = CancelBubble();
   return NS_OK;
 }
 NS_IMETHODIMP
 UIEvent::SetCancelBubble(bool aCancelBubble)
 {
   mEvent->mFlags.mPropagationStopped = aCancelBubble;
   return NS_OK;
 }
 nsIntPoint
 UIEvent::GetLayerPoint() const
 {
   if (!mEvent ||
       (mEvent->eventStructType != NS_MOUSE_EVENT &&
        mEvent->eventStructType != NS_MOUSE_SCROLL_EVENT &&
        mEvent->eventStructType != NS_WHEEL_EVENT &&
        mEvent->eventStructType != NS_POINTER_EVENT &&
        mEvent->eventStructType != NS_TOUCH_EVENT &&
        mEvent->eventStructType != NS_DRAG_EVENT &&
        mEvent->eventStructType != NS_SIMPLE_GESTURE_EVENT) ||
       !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();
   if (keyEvent) {
     return keyEvent->isChar;
   }
   WidgetTextEvent* textEvent = mEvent->AsTextEvent();
   return textEvent ? textEvent->isChar : false;
 }
 NS_IMETHODIMP
 UIEvent::DuplicatePrivateData()
 {
   mClientPoint =
     Event::GetClientCoords(mPresContext, mEvent, mEvent->refPoint,
                            mClientPoint);
   mMovementPoint = GetMovementPoint();
   mLayerPoint = GetLayerPoint();
   mPagePoint =
     Event::GetPageCoords(mPresContext, mEvent, mEvent->refPoint, mClientPoint);
   // GetScreenPoint converts mEvent->refPoint to right coordinates.
   nsIntPoint screenPoint =
     Event::GetScreenCoords(mPresContext, mEvent, mEvent->refPoint);
   nsresult rv = Event::DuplicatePrivateData();
   if (NS_SUCCEEDED(rv)) {
     mEvent->refPoint = LayoutDeviceIntPoint::FromUntyped(screenPoint);
   }
   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, void** 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_META,       NS_DOM_KEYNAME_META },
   { MODIFIER_NUMLOCK,    NS_DOM_KEYNAME_NUMLOCK },
   { MODIFIER_SCROLLLOCK, NS_DOM_KEYNAME_SCROLLLOCK },
   { MODIFIER_SHIFT,      NS_DOM_KEYNAME_SHIFT },
   { 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");
   if (aKey.EqualsLiteral(NS_DOM_KEYNAME_SHIFT)) {
     return inputEvent->IsShift();
   }
   if (aKey.EqualsLiteral(NS_DOM_KEYNAME_CONTROL)) {
     return inputEvent->IsControl();
   }
   if (aKey.EqualsLiteral(NS_DOM_KEYNAME_META)) {
     return inputEvent->IsMeta();
   }
   if (aKey.EqualsLiteral(NS_DOM_KEYNAME_ALT)) {
     return inputEvent->IsAlt();
   }
   if (aKey.EqualsLiteral(NS_DOM_KEYNAME_ALTGRAPH)) {
     return inputEvent->IsAltGraph();
   }
   if (aKey.EqualsLiteral(NS_DOM_KEYNAME_OS)) {
     return inputEvent->IsOS();
   }
   if (aKey.EqualsLiteral(NS_DOM_KEYNAME_CAPSLOCK)) {
     return inputEvent->IsCapsLocked();
   }
   if (aKey.EqualsLiteral(NS_DOM_KEYNAME_NUMLOCK)) {
     return inputEvent->IsNumLocked();
   }
   if (aKey.EqualsLiteral(NS_DOM_KEYNAME_FN)) {
     return inputEvent->IsFn();
   }
   if (aKey.EqualsLiteral(NS_DOM_KEYNAME_SCROLLLOCK)) {
     return inputEvent->IsScrollLocked();
   }
   if (aKey.EqualsLiteral(NS_DOM_KEYNAME_SYMBOLLOCK)) {
     return inputEvent->IsSymbolLocked();
   }
   return false;
 }
 } // namespace dom
 } // namespace mozilla
 using namespace mozilla;
 using namespace mozilla::dom;
 nsresult
 NS_NewDOMUIEvent(nsIDOMEvent** aInstancePtrResult,
                  EventTarget* aOwner,
                  nsPresContext* aPresContext,
                  WidgetGUIEvent* aEvent)
 {
   UIEvent* it = new UIEvent(aOwner, aPresContext, aEvent);
   NS_ADDREF(it);
   *aInstancePtrResult = static_cast<Event*>(it);
   return NS_OK;
 }

The Tor Browser / annotate

dom/events/UIEvent.cpp@b8a032363ba2 (annotated)

dom/events/UIEvent.cpp