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Diffstat (limited to 'dom/events/UIEvent.cpp')
| -rw-r--r-- | dom/events/UIEvent.cpp | 512 |
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(); +} |