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-rw-r--r--dom/events/UIEvent.cpp335
1 files changed, 335 insertions, 0 deletions
diff --git a/dom/events/UIEvent.cpp b/dom/events/UIEvent.cpp
new file mode 100644
index 0000000000..ce43eb08f5
--- /dev/null
+++ b/dom/events/UIEvent.cpp
@@ -0,0 +1,335 @@
+/* -*- 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 "ipc/IPCMessageUtilsSpecializations.h"
+#include "mozilla/dom/UIEvent.h"
+#include "mozilla/ArrayUtils.h"
+#include "mozilla/Assertions.h"
+#include "mozilla/ContentEvents.h"
+#include "mozilla/EventStateManager.h"
+#include "mozilla/PointerLockManager.h"
+#include "mozilla/PresShell.h"
+#include "mozilla/TextEvents.h"
+#include "nsCOMPtr.h"
+#include "nsContentUtils.h"
+#include "nsIContent.h"
+#include "nsIInterfaceRequestorUtils.h"
+#include "nsIDocShell.h"
+#include "nsIFrame.h"
+#include "nsLayoutUtils.h"
+#include "prtime.h"
+
+namespace mozilla::dom {
+
+UIEvent::UIEvent(EventTarget* aOwner, nsPresContext* aPresContext,
+ WidgetGUIEvent* aEvent)
+ : Event(aOwner, aPresContext,
+ aEvent ? aEvent : new InternalUIEvent(false, eVoidEvent, nullptr)),
+ mDefaultClientPoint(0, 0),
+ mLayerPoint(0, 0),
+ mPagePoint(0, 0),
+ mMovementPoint(0, 0) {
+ if (aEvent) {
+ mEventIsInternal = false;
+ } else {
+ mEventIsInternal = true;
+ }
+
+ // 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) {
+ 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(UIEvent)
+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 (mEvent->mFlags.mIsPositionless) {
+ return nsIntPoint(0, 0);
+ }
+
+ if (mPrivateDataDuplicated || mEventIsInternal) {
+ return mMovementPoint;
+ }
+
+ if (!mEvent || !mEvent->AsGUIEvent()->mWidget ||
+ (mEvent->mMessage != eMouseMove && mEvent->mMessage != ePointerMove)) {
+ // Pointer Lock spec defines that movementX/Y must be zero for all mouse
+ // events except mousemove.
+ 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;
+}
+
+void UIEvent::InitUIEvent(const nsAString& typeArg, bool canBubbleArg,
+ bool cancelableArg, nsGlobalWindowInner* viewArg,
+ int32_t detailArg) {
+ if (NS_WARN_IF(mEvent->mFlags.mIsBeingDispatched)) {
+ return;
+ }
+
+ Event::InitEvent(typeArg, canBubbleArg, cancelableArg);
+
+ mDetail = detailArg;
+ mView = viewArg ? viewArg->GetOuterWindow() : nullptr;
+}
+
+already_AddRefed<nsIContent> UIEvent::GetRangeParentContentAndOffset(
+ int32_t* aOffset) const {
+ if (NS_WARN_IF(!mPresContext)) {
+ return nullptr;
+ }
+ RefPtr<PresShell> presShell = mPresContext->GetPresShell();
+ if (NS_WARN_IF(!presShell)) {
+ return nullptr;
+ }
+ nsCOMPtr<nsIContent> container;
+ nsLayoutUtils::GetContainerAndOffsetAtEvent(
+ presShell, mEvent, getter_AddRefs(container), aOffset);
+ return container.forget();
+}
+
+int32_t UIEvent::RangeOffset() const {
+ if (NS_WARN_IF(!mPresContext)) {
+ return 0;
+ }
+ RefPtr<PresShell> presShell = mPresContext->GetPresShell();
+ if (NS_WARN_IF(!presShell)) {
+ return 0;
+ }
+ int32_t offset = 0;
+ nsLayoutUtils::GetContainerAndOffsetAtEvent(presShell, mEvent, nullptr,
+ &offset);
+ return offset;
+}
+
+nsIntPoint UIEvent::GetLayerPoint() const {
+ if (mEvent->mFlags.mIsPositionless) {
+ return nsIntPoint(0, 0);
+ }
+
+ 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, RelativeTo{layer}));
+ return nsIntPoint(nsPresContext::AppUnitsToIntCSSPixels(pt.x),
+ nsPresContext::AppUnitsToIntCSSPixels(pt.y));
+}
+
+void UIEvent::DuplicatePrivateData() {
+ mDefaultClientPoint = Event::GetClientCoords(
+ mPresContext, mEvent, mEvent->mRefPoint, mDefaultClientPoint);
+ mMovementPoint = GetMovementPoint();
+ mLayerPoint = GetLayerPoint();
+ mPagePoint = Event::GetPageCoords(mPresContext, mEvent, mEvent->mRefPoint,
+ mDefaultClientPoint);
+ // GetScreenPoint converts mEvent->mRefPoint to right coordinates.
+ CSSIntPoint screenPoint =
+ Event::GetScreenCoords(mPresContext, mEvent, mEvent->mRefPoint)
+ .valueOr(CSSIntPoint{0, 0});
+
+ Event::DuplicatePrivateData();
+
+ CSSToLayoutDeviceScale scale = mPresContext
+ ? mPresContext->CSSToDevPixelScale()
+ : CSSToLayoutDeviceScale(1);
+ mEvent->mRefPoint = RoundedToInt(screenPoint * scale);
+}
+
+void UIEvent::Serialize(IPC::MessageWriter* aWriter,
+ bool aSerializeInterfaceType) {
+ if (aSerializeInterfaceType) {
+ IPC::WriteParam(aWriter, u"uievent"_ns);
+ }
+
+ Event::Serialize(aWriter, false);
+
+ IPC::WriteParam(aWriter, Detail());
+}
+
+bool UIEvent::Deserialize(IPC::MessageReader* aReader) {
+ NS_ENSURE_TRUE(Event::Deserialize(aReader), false);
+ NS_ENSURE_TRUE(IPC::ReadParam(aReader, &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[] = {
+ // clang-format off
+ { 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 },
+ // clang-format on
+};
+
+// 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);
+}
+
+static Modifiers ConvertToModifiers(const EventModifierInit& aParam) {
+ Modifiers bits = MODIFIER_NONE;
+
+#define SET_MODIFIER(aName, aValue) bits |= aParam.m##aName ? (aValue) : 0;
+
+ 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(ModifierScrollLock, MODIFIER_SCROLLLOCK)
+ SET_MODIFIER(ModifierSymbol, MODIFIER_SYMBOL)
+ SET_MODIFIER(ModifierSymbolLock, MODIFIER_SYMBOLLOCK)
+
+#undef SET_MODIFIER
+
+ return bits;
+}
+
+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 = ConvertToModifiers(aParam);
+}
+
+} // namespace mozilla::dom
+
+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();
+}