/* -*- Mode: C++; tab-width: 8; 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/. */ /* * Base class for all element classes; this provides an implementation * of DOM Core's nsIDOMElement, implements nsIContent, provides * utility methods for subclasses, and so forth. */ #include "mozilla/dom/ElementInlines.h" #include "AnimationCommon.h" #include "mozilla/DebugOnly.h" #include "mozilla/dom/Animation.h" #include "mozilla/dom/Attr.h" #include "mozilla/dom/Grid.h" #include "nsDOMAttributeMap.h" #include "nsIAtom.h" #include "nsIContentInlines.h" #include "mozilla/dom/NodeInfo.h" #include "nsIDocumentInlines.h" #include "mozilla/dom/DocumentTimeline.h" #include "nsIDOMNodeList.h" #include "nsIDOMDocument.h" #include "nsIContentIterator.h" #include "nsFocusManager.h" #include "nsFrameManager.h" #include "nsILinkHandler.h" #include "nsIScriptGlobalObject.h" #include "nsIURL.h" #include "nsContainerFrame.h" #include "nsIAnonymousContentCreator.h" #include "nsIPresShell.h" #include "nsPresContext.h" #include "nsStyleConsts.h" #include "nsString.h" #include "nsUnicharUtils.h" #include "nsIDOMEvent.h" #include "nsDOMCID.h" #include "nsIServiceManager.h" #include "nsIDOMCSSStyleDeclaration.h" #include "nsDOMCSSAttrDeclaration.h" #include "nsNameSpaceManager.h" #include "nsContentList.h" #include "nsVariant.h" #include "nsDOMTokenList.h" #include "nsXBLPrototypeBinding.h" #include "nsError.h" #include "nsDOMString.h" #include "nsIScriptSecurityManager.h" #include "nsIDOMMutationEvent.h" #include "mozilla/dom/AnimatableBinding.h" #include "mozilla/dom/KeyframeAnimationOptionsBinding.h" #include "mozilla/AnimationComparator.h" #include "mozilla/AsyncEventDispatcher.h" #include "mozilla/ContentEvents.h" #include "mozilla/DeclarationBlockInlines.h" #include "mozilla/EffectSet.h" #include "mozilla/EventDispatcher.h" #include "mozilla/EventListenerManager.h" #include "mozilla/EventStateManager.h" #include "mozilla/EventStates.h" #include "mozilla/InternalMutationEvent.h" #include "mozilla/MouseEvents.h" #include "mozilla/TextEvents.h" #include "nsNodeUtils.h" #include "mozilla/dom/DirectionalityUtils.h" #include "nsDocument.h" #include "nsAttrValueOrString.h" #include "nsAttrValueInlines.h" #include "nsCSSPseudoElements.h" #ifdef MOZ_XUL #include "nsXULElement.h" #endif /* MOZ_XUL */ #include "nsSVGElement.h" #include "nsFrameSelection.h" #ifdef DEBUG #include "nsRange.h" #endif #include "nsBindingManager.h" #include "nsXBLBinding.h" #include "nsPIDOMWindow.h" #include "nsPIBoxObject.h" #include "mozilla/dom/DOMRect.h" #include "nsSVGUtils.h" #include "nsLayoutUtils.h" #include "nsGkAtoms.h" #include "nsContentUtils.h" #include "ChildIterator.h" #include "nsIDOMEventListener.h" #include "nsIWebNavigation.h" #include "nsIBaseWindow.h" #include "nsIWidget.h" #include "nsNodeInfoManager.h" #include "nsICategoryManager.h" #include "nsIDOMDocumentType.h" #include "nsGenericHTMLElement.h" #include "nsIEditor.h" #include "nsIEditorIMESupport.h" #include "nsContentCreatorFunctions.h" #include "nsIControllers.h" #include "nsView.h" #include "nsViewManager.h" #include "nsIScrollableFrame.h" #include "mozilla/css/StyleRule.h" /* For nsCSSSelectorList */ #include "nsCSSRuleProcessor.h" #include "nsRuleProcessorData.h" #include "nsTextNode.h" #ifdef MOZ_XUL #include "nsIXULDocument.h" #endif /* MOZ_XUL */ #include "nsCycleCollectionParticipant.h" #include "nsCCUncollectableMarker.h" #include "mozAutoDocUpdate.h" #include "nsCSSParser.h" #include "prprf.h" #include "nsDOMMutationObserver.h" #include "nsWrapperCacheInlines.h" #include "xpcpublic.h" #include "nsIScriptError.h" #include "mozilla/Telemetry.h" #include "mozilla/CORSMode.h" #include "mozilla/dom/ShadowRoot.h" #include "mozilla/dom/NodeListBinding.h" #include "nsStyledElement.h" #include "nsXBLService.h" #include "nsITextControlElement.h" #include "nsITextControlFrame.h" #include "nsISupportsImpl.h" #include "mozilla/dom/CSSPseudoElement.h" #include "mozilla/dom/DocumentFragment.h" #include "mozilla/dom/KeyframeEffect.h" #include "mozilla/dom/KeyframeEffectBinding.h" #include "mozilla/dom/WindowBinding.h" #include "mozilla/dom/ElementBinding.h" #include "mozilla/IntegerPrintfMacros.h" #include "mozilla/Preferences.h" #include "nsComputedDOMStyle.h" #include "nsDOMStringMap.h" #include "DOMIntersectionObserver.h" using namespace mozilla; using namespace mozilla::dom; nsIAtom* nsIContent::DoGetID() const { MOZ_ASSERT(HasID(), "Unexpected call"); MOZ_ASSERT(IsElement(), "Only elements can have IDs"); return AsElement()->GetParsedAttr(nsGkAtoms::id)->GetAtomValue(); } const nsAttrValue* Element::DoGetClasses() const { MOZ_ASSERT(MayHaveClass(), "Unexpected call"); if (IsSVGElement()) { const nsAttrValue* animClass = static_cast(this)->GetAnimatedClassName(); if (animClass) { return animClass; } } return GetParsedAttr(nsGkAtoms::_class); } NS_IMETHODIMP Element::QueryInterface(REFNSIID aIID, void** aInstancePtr) { if (aIID.Equals(NS_GET_IID(Element))) { NS_ADDREF_THIS(); *aInstancePtr = this; return NS_OK; } NS_ASSERTION(aInstancePtr, "QueryInterface requires a non-NULL destination!"); nsresult rv = FragmentOrElement::QueryInterface(aIID, aInstancePtr); if (NS_SUCCEEDED(rv)) { return NS_OK; } // Give the binding manager a chance to get an interface for this element. return OwnerDoc()->BindingManager()->GetBindingImplementation(this, aIID, aInstancePtr); } EventStates Element::IntrinsicState() const { return IsEditable() ? NS_EVENT_STATE_MOZ_READWRITE : NS_EVENT_STATE_MOZ_READONLY; } void Element::NotifyStateChange(EventStates aStates) { nsIDocument* doc = GetComposedDoc(); if (doc) { nsAutoScriptBlocker scriptBlocker; doc->ContentStateChanged(this, aStates); } } void Element::UpdateLinkState(EventStates aState) { MOZ_ASSERT(!aState.HasAtLeastOneOfStates(~(NS_EVENT_STATE_VISITED | NS_EVENT_STATE_UNVISITED)), "Unexpected link state bits"); mState = (mState & ~(NS_EVENT_STATE_VISITED | NS_EVENT_STATE_UNVISITED)) | aState; } void Element::UpdateState(bool aNotify) { EventStates oldState = mState; mState = IntrinsicState() | (oldState & ESM_MANAGED_STATES); if (aNotify) { EventStates changedStates = oldState ^ mState; if (!changedStates.IsEmpty()) { nsIDocument* doc = GetComposedDoc(); if (doc) { nsAutoScriptBlocker scriptBlocker; doc->ContentStateChanged(this, changedStates); } } } } void nsIContent::UpdateEditableState(bool aNotify) { // Guaranteed to be non-element content NS_ASSERTION(!IsElement(), "What happened here?"); nsIContent *parent = GetParent(); // Skip over unknown native anonymous content to avoid setting a flag we // can't clear later bool isUnknownNativeAnon = false; if (IsInNativeAnonymousSubtree()) { isUnknownNativeAnon = true; nsCOMPtr root = this; while (root && !root->IsRootOfNativeAnonymousSubtree()) { root = root->GetParent(); } // root should always be true here, but isn't -- bug 999416 if (root) { nsIFrame* rootFrame = root->GetPrimaryFrame(); if (rootFrame) { nsContainerFrame* parentFrame = rootFrame->GetParent(); nsITextControlFrame* textCtrl = do_QueryFrame(parentFrame); isUnknownNativeAnon = !textCtrl; } } } SetEditableFlag(parent && parent->HasFlag(NODE_IS_EDITABLE) && !isUnknownNativeAnon); } void Element::UpdateEditableState(bool aNotify) { nsIContent *parent = GetParent(); SetEditableFlag(parent && parent->HasFlag(NODE_IS_EDITABLE)); if (aNotify) { UpdateState(aNotify); } else { // Avoid calling UpdateState in this very common case, because // this gets called for pretty much every single element on // insertion into the document and UpdateState can be slow for // some kinds of elements even when not notifying. if (IsEditable()) { RemoveStatesSilently(NS_EVENT_STATE_MOZ_READONLY); AddStatesSilently(NS_EVENT_STATE_MOZ_READWRITE); } else { RemoveStatesSilently(NS_EVENT_STATE_MOZ_READWRITE); AddStatesSilently(NS_EVENT_STATE_MOZ_READONLY); } } } int32_t Element::TabIndex() { const nsAttrValue* attrVal = mAttrsAndChildren.GetAttr(nsGkAtoms::tabindex); if (attrVal && attrVal->Type() == nsAttrValue::eInteger) { return attrVal->GetIntegerValue(); } return TabIndexDefault(); } void Element::Focus(mozilla::ErrorResult& aError) { nsCOMPtr domElement = do_QueryInterface(this); nsIFocusManager* fm = nsFocusManager::GetFocusManager(); if (fm && domElement) { aError = fm->SetFocus(domElement, 0); } } void Element::SetTabIndex(int32_t aTabIndex, mozilla::ErrorResult& aError) { nsAutoString value; value.AppendInt(aTabIndex); SetAttr(nsGkAtoms::tabindex, value, aError); } void Element::Blur(mozilla::ErrorResult& aError) { if (!ShouldBlur(this)) { return; } nsIDocument* doc = GetComposedDoc(); if (!doc) { return; } nsPIDOMWindowOuter* win = doc->GetWindow(); nsIFocusManager* fm = nsFocusManager::GetFocusManager(); if (win && fm) { aError = fm->ClearFocus(win); } } EventStates Element::StyleStateFromLocks() const { EventStates locks = LockedStyleStates(); EventStates state = mState | locks; if (locks.HasState(NS_EVENT_STATE_VISITED)) { return state & ~NS_EVENT_STATE_UNVISITED; } if (locks.HasState(NS_EVENT_STATE_UNVISITED)) { return state & ~NS_EVENT_STATE_VISITED; } return state; } EventStates Element::LockedStyleStates() const { EventStates* locks = static_cast(GetProperty(nsGkAtoms::lockedStyleStates)); if (locks) { return *locks; } return EventStates(); } void Element::NotifyStyleStateChange(EventStates aStates) { nsIDocument* doc = GetComposedDoc(); if (doc) { nsIPresShell *presShell = doc->GetShell(); if (presShell) { nsAutoScriptBlocker scriptBlocker; presShell->ContentStateChanged(doc, this, aStates); } } } void Element::LockStyleStates(EventStates aStates) { EventStates* locks = new EventStates(LockedStyleStates()); *locks |= aStates; if (aStates.HasState(NS_EVENT_STATE_VISITED)) { *locks &= ~NS_EVENT_STATE_UNVISITED; } if (aStates.HasState(NS_EVENT_STATE_UNVISITED)) { *locks &= ~NS_EVENT_STATE_VISITED; } SetProperty(nsGkAtoms::lockedStyleStates, locks, nsINode::DeleteProperty); SetHasLockedStyleStates(); NotifyStyleStateChange(aStates); } void Element::UnlockStyleStates(EventStates aStates) { EventStates* locks = new EventStates(LockedStyleStates()); *locks &= ~aStates; if (locks->IsEmpty()) { DeleteProperty(nsGkAtoms::lockedStyleStates); ClearHasLockedStyleStates(); delete locks; } else { SetProperty(nsGkAtoms::lockedStyleStates, locks, nsINode::DeleteProperty); } NotifyStyleStateChange(aStates); } void Element::ClearStyleStateLocks() { EventStates locks = LockedStyleStates(); DeleteProperty(nsGkAtoms::lockedStyleStates); ClearHasLockedStyleStates(); NotifyStyleStateChange(locks); } bool Element::GetBindingURL(nsIDocument *aDocument, css::URLValue **aResult) { // If we have a frame the frame has already loaded the binding. And // otherwise, don't do anything else here unless we're dealing with // XUL or an HTML element that may have a plugin-related overlay // (i.e. object, embed, or applet). bool isXULorPluginElement = (IsXULElement() || IsHTMLElement(nsGkAtoms::object) || IsHTMLElement(nsGkAtoms::embed) || IsHTMLElement(nsGkAtoms::applet)); nsCOMPtr shell = aDocument->GetShell(); if (!shell || GetPrimaryFrame() || !isXULorPluginElement) { *aResult = nullptr; return true; } // Get the computed -moz-binding directly from the style context RefPtr sc = nsComputedDOMStyle::GetStyleContextForElementNoFlush(this, nullptr, shell); NS_ENSURE_TRUE(sc, false); *aResult = sc->StyleDisplay()->mBinding; return true; } JSObject* Element::WrapObject(JSContext *aCx, JS::Handle aGivenProto) { JS::Rooted obj(aCx, nsINode::WrapObject(aCx, aGivenProto)); if (!obj) { return nullptr; } nsIDocument* doc; if (HasFlag(NODE_FORCE_XBL_BINDINGS)) { doc = OwnerDoc(); } else { doc = GetComposedDoc(); } if (!doc) { // There's no baseclass that cares about this call so we just // return here. return obj; } // We must ensure that the XBL Binding is installed before we hand // back this object. if (HasFlag(NODE_MAY_BE_IN_BINDING_MNGR) && GetXBLBinding()) { // There's already a binding for this element so nothing left to // be done here. // In theory we could call ExecuteAttachedHandler here when it's safe to // run script if we also removed the binding from the PAQ queue, but that // seems like a scary change that would mosly just add more // inconsistencies. return obj; } // Make sure the style context goes away _before_ we load the binding // since that can destroy the relevant presshell. mozilla::css::URLValue *bindingURL; bool ok = GetBindingURL(doc, &bindingURL); if (!ok) { dom::Throw(aCx, NS_ERROR_FAILURE); return nullptr; } if (!bindingURL) { // No binding, nothing left to do here. return obj; } nsCOMPtr uri = bindingURL->GetURI(); nsCOMPtr principal = bindingURL->mOriginPrincipal.get(); // We have a binding that must be installed. bool dummy; nsXBLService* xblService = nsXBLService::GetInstance(); if (!xblService) { dom::Throw(aCx, NS_ERROR_NOT_AVAILABLE); return nullptr; } { // Make a scope so that ~nsRefPtr can GC before returning obj. RefPtr binding; xblService->LoadBindings(this, uri, principal, getter_AddRefs(binding), &dummy); if (binding) { if (nsContentUtils::IsSafeToRunScript()) { binding->ExecuteAttachedHandler(); } else { nsContentUtils::AddScriptRunner( NewRunnableMethod(binding, &nsXBLBinding::ExecuteAttachedHandler)); } } } return obj; } /* virtual */ nsINode* Element::GetScopeChainParent() const { return OwnerDoc(); } nsDOMTokenList* Element::ClassList() { Element::nsDOMSlots* slots = DOMSlots(); if (!slots->mClassList) { slots->mClassList = new nsDOMTokenList(this, nsGkAtoms::_class); } return slots->mClassList; } void Element::GetClassList(nsISupports** aClassList) { NS_ADDREF(*aClassList = ClassList()); } void Element::GetAttributeNames(nsTArray& aResult) { uint32_t count = mAttrsAndChildren.AttrCount(); for (uint32_t i = 0; i < count; ++i) { const nsAttrName* name = mAttrsAndChildren.AttrNameAt(i); name->GetQualifiedName(*aResult.AppendElement()); } } already_AddRefed Element::GetElementsByTagName(const nsAString& aLocalName) { return NS_GetContentList(this, kNameSpaceID_Unknown, aLocalName); } void Element::GetElementsByTagName(const nsAString& aLocalName, nsIDOMHTMLCollection** aResult) { *aResult = GetElementsByTagName(aLocalName).take(); } nsIFrame* Element::GetStyledFrame() { nsIFrame *frame = GetPrimaryFrame(Flush_Layout); return frame ? nsLayoutUtils::GetStyleFrame(frame) : nullptr; } nsIScrollableFrame* Element::GetScrollFrame(nsIFrame **aStyledFrame, bool aFlushLayout) { // it isn't clear what to return for SVG nodes, so just return nothing if (IsSVGElement()) { if (aStyledFrame) { *aStyledFrame = nullptr; } return nullptr; } // Inline version of GetStyledFrame to use Flush_None if needed. nsIFrame* frame = GetPrimaryFrame(aFlushLayout ? Flush_Layout : Flush_None); if (frame) { frame = nsLayoutUtils::GetStyleFrame(frame); } if (aStyledFrame) { *aStyledFrame = frame; } if (!frame) { return nullptr; } // menu frames implement GetScrollTargetFrame but we don't want // to use it here. Similar for comboboxes. nsIAtom* type = frame->GetType(); if (type != nsGkAtoms::menuFrame && type != nsGkAtoms::comboboxControlFrame) { nsIScrollableFrame *scrollFrame = frame->GetScrollTargetFrame(); if (scrollFrame) return scrollFrame; } nsIDocument* doc = OwnerDoc(); bool quirksMode = doc->GetCompatibilityMode() == eCompatibility_NavQuirks; Element* elementWithRootScrollInfo = quirksMode ? doc->GetBodyElement() : doc->GetRootElement(); if (this == elementWithRootScrollInfo) { // In quirks mode, the scroll info for the body element should map to the // root scrollable frame. // In strict mode, the scroll info for the root element should map to the // the root scrollable frame. return frame->PresContext()->PresShell()->GetRootScrollFrameAsScrollable(); } return nullptr; } void Element::ScrollIntoView(const BooleanOrScrollIntoViewOptions& aObject) { if (aObject.IsScrollIntoViewOptions()) { return ScrollIntoView(aObject.GetAsScrollIntoViewOptions()); } MOZ_DIAGNOSTIC_ASSERT(aObject.IsBoolean()); ScrollIntoViewOptions options; if (aObject.GetAsBoolean()) { options.mBlock = ScrollLogicalPosition::Start; options.mInline = ScrollLogicalPosition::Nearest; } else { options.mBlock = ScrollLogicalPosition::End; options.mInline = ScrollLogicalPosition::Nearest; } return ScrollIntoView(options); } void Element::ScrollIntoView(const ScrollIntoViewOptions &aOptions) { nsIDocument *document = GetComposedDoc(); if (!document) { return; } // Get the presentation shell nsCOMPtr presShell = document->GetShell(); if (!presShell) { return; } int16_t vpercent = nsIPresShell::SCROLL_CENTER; switch (aOptions.mBlock) { case ScrollLogicalPosition::Start: vpercent = nsIPresShell::SCROLL_TOP; break; case ScrollLogicalPosition::Center: vpercent = nsIPresShell::SCROLL_CENTER; break; case ScrollLogicalPosition::End: vpercent = nsIPresShell::SCROLL_BOTTOM; break; case ScrollLogicalPosition::Nearest: vpercent = nsIPresShell::SCROLL_MINIMUM; break; default: MOZ_ASSERT_UNREACHABLE("Unexpected ScrollLogicalPosition value"); } int16_t hpercent = nsIPresShell::SCROLL_CENTER; switch (aOptions.mInline) { case ScrollLogicalPosition::Start: hpercent = nsIPresShell::SCROLL_LEFT; break; case ScrollLogicalPosition::Center: hpercent = nsIPresShell::SCROLL_CENTER; break; case ScrollLogicalPosition::End: hpercent = nsIPresShell::SCROLL_RIGHT; break; case ScrollLogicalPosition::Nearest: hpercent = nsIPresShell::SCROLL_MINIMUM; break; default: MOZ_ASSERT_UNREACHABLE("Unexpected ScrollLogicalPosition value"); } uint32_t flags = nsIPresShell::SCROLL_OVERFLOW_HIDDEN; if (aOptions.mBehavior == ScrollBehavior::Smooth) { flags |= nsIPresShell::SCROLL_SMOOTH; } else if (aOptions.mBehavior == ScrollBehavior::Auto) { flags |= nsIPresShell::SCROLL_SMOOTH_AUTO; } presShell->ScrollContentIntoView(this, nsIPresShell::ScrollAxis( vpercent, nsIPresShell::SCROLL_ALWAYS), nsIPresShell::ScrollAxis( hpercent, nsIPresShell::SCROLL_ALWAYS), flags); } void Element::Scroll(const CSSIntPoint& aScroll, const ScrollOptions& aOptions) { nsIScrollableFrame* sf = GetScrollFrame(); if (sf) { nsIScrollableFrame::ScrollMode scrollMode = nsIScrollableFrame::INSTANT; if (aOptions.mBehavior == ScrollBehavior::Smooth) { scrollMode = nsIScrollableFrame::SMOOTH_MSD; } else if (aOptions.mBehavior == ScrollBehavior::Auto) { ScrollbarStyles styles = sf->GetScrollbarStyles(); if (styles.mScrollBehavior == NS_STYLE_SCROLL_BEHAVIOR_SMOOTH) { scrollMode = nsIScrollableFrame::SMOOTH_MSD; } } sf->ScrollToCSSPixels(aScroll, scrollMode); } } void Element::Scroll(double aXScroll, double aYScroll) { // Convert -Inf, Inf, and NaN to 0; otherwise, convert by C-style cast. auto scrollPos = CSSIntPoint::Truncate(mozilla::ToZeroIfNonfinite(aXScroll), mozilla::ToZeroIfNonfinite(aYScroll)); Scroll(scrollPos, ScrollOptions()); } void Element::Scroll(const ScrollToOptions& aOptions) { nsIScrollableFrame *sf = GetScrollFrame(); if (sf) { CSSIntPoint scrollPos = sf->GetScrollPositionCSSPixels(); if (aOptions.mLeft.WasPassed()) { scrollPos.x = mozilla::ToZeroIfNonfinite(aOptions.mLeft.Value()); } if (aOptions.mTop.WasPassed()) { scrollPos.y = mozilla::ToZeroIfNonfinite(aOptions.mTop.Value()); } Scroll(scrollPos, aOptions); } } void Element::ScrollTo(double aXScroll, double aYScroll) { Scroll(aXScroll, aYScroll); } void Element::ScrollTo(const ScrollToOptions& aOptions) { Scroll(aOptions); } void Element::ScrollBy(double aXScrollDif, double aYScrollDif) { nsIScrollableFrame *sf = GetScrollFrame(); if (sf) { CSSIntPoint scrollPos = sf->GetScrollPositionCSSPixels(); scrollPos += CSSIntPoint::Truncate(mozilla::ToZeroIfNonfinite(aXScrollDif), mozilla::ToZeroIfNonfinite(aYScrollDif)); Scroll(scrollPos, ScrollOptions()); } } void Element::ScrollBy(const ScrollToOptions& aOptions) { nsIScrollableFrame *sf = GetScrollFrame(); if (sf) { CSSIntPoint scrollPos = sf->GetScrollPositionCSSPixels(); if (aOptions.mLeft.WasPassed()) { scrollPos.x += mozilla::ToZeroIfNonfinite(aOptions.mLeft.Value()); } if (aOptions.mTop.WasPassed()) { scrollPos.y += mozilla::ToZeroIfNonfinite(aOptions.mTop.Value()); } Scroll(scrollPos, aOptions); } } int32_t Element::ScrollTop() { nsIScrollableFrame* sf = GetScrollFrame(); return sf ? sf->GetScrollPositionCSSPixels().y : 0; } void Element::SetScrollTop(int32_t aScrollTop) { nsIScrollableFrame* sf = GetScrollFrame(); if (sf) { nsIScrollableFrame::ScrollMode scrollMode = nsIScrollableFrame::INSTANT; if (sf->GetScrollbarStyles().mScrollBehavior == NS_STYLE_SCROLL_BEHAVIOR_SMOOTH) { scrollMode = nsIScrollableFrame::SMOOTH_MSD; } sf->ScrollToCSSPixels(CSSIntPoint(sf->GetScrollPositionCSSPixels().x, aScrollTop), scrollMode); } } int32_t Element::ScrollLeft() { nsIScrollableFrame* sf = GetScrollFrame(); return sf ? sf->GetScrollPositionCSSPixels().x : 0; } void Element::SetScrollLeft(int32_t aScrollLeft) { nsIScrollableFrame* sf = GetScrollFrame(); if (sf) { nsIScrollableFrame::ScrollMode scrollMode = nsIScrollableFrame::INSTANT; if (sf->GetScrollbarStyles().mScrollBehavior == NS_STYLE_SCROLL_BEHAVIOR_SMOOTH) { scrollMode = nsIScrollableFrame::SMOOTH_MSD; } sf->ScrollToCSSPixels(CSSIntPoint(aScrollLeft, sf->GetScrollPositionCSSPixels().y), scrollMode); } } bool Element::ScrollByNoFlush(int32_t aDx, int32_t aDy) { nsIScrollableFrame* sf = GetScrollFrame(nullptr, false); if (!sf) { return false; } nsWeakFrame weakRef(sf->GetScrolledFrame()); CSSIntPoint before = sf->GetScrollPositionCSSPixels(); sf->ScrollToCSSPixelsApproximate(CSSIntPoint(before.x + aDx, before.y + aDy)); // The frame was destroyed, can't keep on scrolling. if (!weakRef.IsAlive()) { return false; } CSSIntPoint after = sf->GetScrollPositionCSSPixels(); return (before != after); } void Element::MozScrollSnap() { nsIScrollableFrame* sf = GetScrollFrame(nullptr, false); if (sf) { sf->ScrollSnap(); } } static nsSize GetScrollRectSizeForOverflowVisibleFrame(nsIFrame* aFrame) { if (!aFrame) { return nsSize(0,0); } nsRect paddingRect = aFrame->GetPaddingRectRelativeToSelf(); nsOverflowAreas overflowAreas(paddingRect, paddingRect); // Add the scrollable overflow areas of children (if any) to the paddingRect. // It's important to start with the paddingRect, otherwise if there are no // children the overflow rect will be 0,0,0,0 which will force the point 0,0 // to be included in the final rect. nsLayoutUtils::UnionChildOverflow(aFrame, overflowAreas); // Make sure that an empty padding-rect's edges are included, by adding // the padding-rect in again with UnionEdges. nsRect overflowRect = overflowAreas.ScrollableOverflow().UnionEdges(paddingRect); return nsLayoutUtils::GetScrolledRect(aFrame, overflowRect, paddingRect.Size(), aFrame->StyleVisibility()->mDirection).Size(); } int32_t Element::ScrollHeight() { if (IsSVGElement()) return 0; nsIScrollableFrame* sf = GetScrollFrame(); nscoord height; if (sf) { height = sf->GetScrollRange().height + sf->GetScrollPortRect().height; } else { height = GetScrollRectSizeForOverflowVisibleFrame(GetStyledFrame()).height; } return nsPresContext::AppUnitsToIntCSSPixels(height); } int32_t Element::ScrollWidth() { if (IsSVGElement()) return 0; nsIScrollableFrame* sf = GetScrollFrame(); nscoord width; if (sf) { width = sf->GetScrollRange().width + sf->GetScrollPortRect().width; } else { width = GetScrollRectSizeForOverflowVisibleFrame(GetStyledFrame()).width; } return nsPresContext::AppUnitsToIntCSSPixels(width); } nsRect Element::GetClientAreaRect() { nsIFrame* styledFrame; nsIScrollableFrame* sf = GetScrollFrame(&styledFrame); if (sf) { return sf->GetScrollPortRect(); } if (styledFrame && (styledFrame->StyleDisplay()->mDisplay != StyleDisplay::Inline || styledFrame->IsFrameOfType(nsIFrame::eReplaced))) { // Special case code to make client area work even when there isn't // a scroll view, see bug 180552, bug 227567. return styledFrame->GetPaddingRect() - styledFrame->GetPositionIgnoringScrolling(); } // SVG nodes reach here and just return 0 return nsRect(0, 0, 0, 0); } already_AddRefed Element::GetBoundingClientRect() { RefPtr rect = new DOMRect(this); nsIFrame* frame = GetPrimaryFrame(Flush_Layout); if (!frame) { // display:none, perhaps? Return the empty rect return rect.forget(); } nsRect r = nsLayoutUtils::GetAllInFlowRectsUnion(frame, nsLayoutUtils::GetContainingBlockForClientRect(frame), nsLayoutUtils::RECTS_ACCOUNT_FOR_TRANSFORMS); rect->SetLayoutRect(r); return rect.forget(); } already_AddRefed Element::GetClientRects() { RefPtr rectList = new DOMRectList(this); nsIFrame* frame = GetPrimaryFrame(Flush_Layout); if (!frame) { // display:none, perhaps? Return an empty list return rectList.forget(); } nsLayoutUtils::RectListBuilder builder(rectList); nsLayoutUtils::GetAllInFlowRects(frame, nsLayoutUtils::GetContainingBlockForClientRect(frame), &builder, nsLayoutUtils::RECTS_ACCOUNT_FOR_TRANSFORMS); return rectList.forget(); } //---------------------------------------------------------------------- void Element::AddToIdTable(nsIAtom* aId) { NS_ASSERTION(HasID(), "Node doesn't have an ID?"); if (IsInShadowTree()) { ShadowRoot* containingShadow = GetContainingShadow(); containingShadow->AddToIdTable(this, aId); } else { nsIDocument* doc = GetUncomposedDoc(); if (doc && (!IsInAnonymousSubtree() || doc->IsXULDocument())) { doc->AddToIdTable(this, aId); } } } void Element::RemoveFromIdTable() { if (!HasID()) { return; } nsIAtom* id = DoGetID(); if (IsInShadowTree()) { ShadowRoot* containingShadow = GetContainingShadow(); // Check for containingShadow because it may have // been deleted during unlinking. if (containingShadow) { containingShadow->RemoveFromIdTable(this, id); } } else { nsIDocument* doc = GetUncomposedDoc(); if (doc && (!IsInAnonymousSubtree() || doc->IsXULDocument())) { doc->RemoveFromIdTable(this, id); } } } void Element::SetSlot(const nsAString& aName, ErrorResult& aError) { aError = SetAttr(kNameSpaceID_None, nsGkAtoms::slot, aName, true); } void Element::GetSlot(nsAString& aName) { GetAttr(kNameSpaceID_None, nsGkAtoms::slot, aName); } // https://dom.spec.whatwg.org/#dom-element-shadowroot ShadowRoot* Element::GetShadowRootByMode() const { /** * 1. Let shadow be context object’s shadow root. * 2. If shadow is null or its mode is "closed", then return null. */ ShadowRoot* shadowRoot = GetShadowRoot(); if (!shadowRoot || shadowRoot->IsClosed()) { return nullptr; } /** * 3. Return shadow. */ return shadowRoot; } // https://dom.spec.whatwg.org/#dom-element-attachshadow already_AddRefed Element::AttachShadow(const ShadowRootInit& aInit, ErrorResult& aError) { /** * 1. If context object’s namespace is not the HTML namespace, * then throw a "NotSupportedError" DOMException. */ if (!IsHTMLElement()) { aError.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR); return nullptr; } /** * 2. If context object’s local name is not * a valid custom element name, "article", "aside", "blockquote", * "body", "div", "footer", "h1", "h2", "h3", "h4", "h5", "h6", * "header", "main" "nav", "p", "section", or "span", * then throw a "NotSupportedError" DOMException. */ nsIAtom* nameAtom = NodeInfo()->NameAtom(); if (!(nsContentUtils::IsCustomElementName(nameAtom) || nameAtom == nsGkAtoms::article || nameAtom == nsGkAtoms::aside || nameAtom == nsGkAtoms::blockquote || nameAtom == nsGkAtoms::body || nameAtom == nsGkAtoms::div || nameAtom == nsGkAtoms::footer || nameAtom == nsGkAtoms::h1 || nameAtom == nsGkAtoms::h2 || nameAtom == nsGkAtoms::h3 || nameAtom == nsGkAtoms::h4 || nameAtom == nsGkAtoms::h5 || nameAtom == nsGkAtoms::h6 || nameAtom == nsGkAtoms::header || nameAtom == nsGkAtoms::main || nameAtom == nsGkAtoms::nav || nameAtom == nsGkAtoms::p || nameAtom == nsGkAtoms::section || nameAtom == nsGkAtoms::span)) { aError.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR); return nullptr; } return AttachShadowInternal(aInit.mMode == ShadowRootMode::Closed, aError); } already_AddRefed Element::CreateShadowRoot(ErrorResult& aError) { return AttachShadowInternal(false, aError); } already_AddRefed Element::AttachShadowInternal(bool aClosed, ErrorResult& aError) { /** * 3. If context object is a shadow host, then throw * an "InvalidStateError" DOMException. */ if (GetShadowRoot()) { aError.Throw(NS_ERROR_DOM_INVALID_STATE_ERR); return nullptr; } nsAutoScriptBlocker scriptBlocker; RefPtr nodeInfo; nodeInfo = mNodeInfo->NodeInfoManager()->GetNodeInfo( nsGkAtoms::documentFragmentNodeName, nullptr, kNameSpaceID_None, nsIDOMNode::DOCUMENT_FRAGMENT_NODE); RefPtr docInfo = new nsXBLDocumentInfo(OwnerDoc()); nsXBLPrototypeBinding* protoBinding = new nsXBLPrototypeBinding(); aError = protoBinding->Init(NS_LITERAL_CSTRING("shadowroot"), docInfo, nullptr, true); if (aError.Failed()) { delete protoBinding; return nullptr; } if (nsIDocument* doc = GetComposedDoc()) { if (nsIPresShell* shell = doc->GetShell()) { shell->DestroyFramesForAndRestyle(this); MOZ_ASSERT(!shell->FrameManager()->GetDisplayContentsStyleFor(this)); } } MOZ_ASSERT(!GetPrimaryFrame()); // Unlike for XBL, false is the default for inheriting style. protoBinding->SetInheritsStyle(false); // Calling SetPrototypeBinding takes ownership of protoBinding. docInfo->SetPrototypeBinding(NS_LITERAL_CSTRING("shadowroot"), protoBinding); /** * 4. Let shadow be a new shadow root whose node document is * context object’s node document, host is context object, * and mode is init’s mode. */ RefPtr shadowRoot = new ShadowRoot(this, aClosed, nodeInfo.forget(), protoBinding); shadowRoot->SetIsComposedDocParticipant(IsInComposedDoc()); /** * 5. Set context object’s shadow root to shadow. */ SetShadowRoot(shadowRoot); // xblBinding takes ownership of docInfo. RefPtr xblBinding = new nsXBLBinding(shadowRoot, protoBinding); shadowRoot->SetAssociatedBinding(xblBinding); xblBinding->SetBoundElement(this); SetXBLBinding(xblBinding); /** * 6. Return shadow. */ return shadowRoot.forget(); } void Element::GetAttribute(const nsAString& aName, DOMString& aReturn) { const nsAttrValue* val = mAttrsAndChildren.GetAttr(aName, IsHTMLElement() && IsInHTMLDocument() ? eIgnoreCase : eCaseMatters); if (val) { val->ToString(aReturn); } else { if (IsXULElement()) { // XXX should be SetDOMStringToNull(aReturn); // See bug 232598 // aReturn is already empty } else { aReturn.SetNull(); } } } bool Element::ToggleAttribute(const nsAString& aName, const Optional& aForce, ErrorResult& aError) { aError = nsContentUtils::CheckQName(aName, false); if (aError.Failed()) { return false; } nsAutoString nameToUse; const nsAttrName* name = InternalGetAttrNameFromQName(aName, &nameToUse); if (!name) { if (aForce.WasPassed() && !aForce.Value()) { return false; } nsCOMPtr nameAtom = NS_AtomizeMainThread(nameToUse); if (!nameAtom) { aError.Throw(NS_ERROR_OUT_OF_MEMORY); return false; } aError = SetAttr(kNameSpaceID_None, nameAtom, EmptyString(), true); return true; } if (aForce.WasPassed() && aForce.Value()) { return true; } // Hold a strong reference here so that the atom or nodeinfo doesn't go // away during UnsetAttr. If it did UnsetAttr would be left with a // dangling pointer as argument without knowing it. nsAttrName tmp(*name); aError = UnsetAttr(name->NamespaceID(), name->LocalName(), true); return false; } void Element::SetAttribute(const nsAString& aName, const nsAString& aValue, ErrorResult& aError) { aError = nsContentUtils::CheckQName(aName, false); if (aError.Failed()) { return; } nsAutoString nameToUse; const nsAttrName* name = InternalGetAttrNameFromQName(aName, &nameToUse); if (!name) { nsCOMPtr nameAtom = NS_AtomizeMainThread(nameToUse); if (!nameAtom) { aError.Throw(NS_ERROR_OUT_OF_MEMORY); return; } aError = SetAttr(kNameSpaceID_None, nameAtom, aValue, true); return; } aError = SetAttr(name->NamespaceID(), name->LocalName(), name->GetPrefix(), aValue, true); return; } void Element::RemoveAttribute(const nsAString& aName, ErrorResult& aError) { const nsAttrName* name = InternalGetAttrNameFromQName(aName); if (!name) { // If there is no canonical nsAttrName for this attribute name, then the // attribute does not exist and we can't get its namespace ID and // local name below, so we return early. return; } // Hold a strong reference here so that the atom or nodeinfo doesn't go // away during UnsetAttr. If it did UnsetAttr would be left with a // dangling pointer as argument without knowing it. nsAttrName tmp(*name); aError = UnsetAttr(name->NamespaceID(), name->LocalName(), true); } Attr* Element::GetAttributeNode(const nsAString& aName) { OwnerDoc()->WarnOnceAbout(nsIDocument::eGetAttributeNode); return Attributes()->GetNamedItem(aName); } already_AddRefed Element::SetAttributeNode(Attr& aNewAttr, ErrorResult& aError) { // XXXbz can we just remove this warning and the one in setAttributeNodeNS and // alias setAttributeNode to setAttributeNodeNS? OwnerDoc()->WarnOnceAbout(nsIDocument::eSetAttributeNode); return Attributes()->SetNamedItemNS(aNewAttr, aError); } already_AddRefed Element::RemoveAttributeNode(Attr& aAttribute, ErrorResult& aError) { Element *elem = aAttribute.GetElement(); if (elem != this) { aError.Throw(NS_ERROR_DOM_NOT_FOUND_ERR); return nullptr; } OwnerDoc()->WarnOnceAbout(nsIDocument::eRemoveAttributeNode); nsAutoString nameSpaceURI; aAttribute.NodeInfo()->GetNamespaceURI(nameSpaceURI); return Attributes()->RemoveNamedItemNS(nameSpaceURI, aAttribute.NodeInfo()->LocalName(), aError); } void Element::GetAttributeNS(const nsAString& aNamespaceURI, const nsAString& aLocalName, nsAString& aReturn) { int32_t nsid = nsContentUtils::NameSpaceManager()->GetNameSpaceID(aNamespaceURI, nsContentUtils::IsChromeDoc(OwnerDoc())); if (nsid == kNameSpaceID_Unknown) { // Unknown namespace means no attribute. SetDOMStringToNull(aReturn); return; } nsCOMPtr name = NS_AtomizeMainThread(aLocalName); bool hasAttr = GetAttr(nsid, name, aReturn); if (!hasAttr) { SetDOMStringToNull(aReturn); } } void Element::SetAttributeNS(const nsAString& aNamespaceURI, const nsAString& aQualifiedName, const nsAString& aValue, ErrorResult& aError) { RefPtr ni; aError = nsContentUtils::GetNodeInfoFromQName(aNamespaceURI, aQualifiedName, mNodeInfo->NodeInfoManager(), nsIDOMNode::ATTRIBUTE_NODE, getter_AddRefs(ni)); if (aError.Failed()) { return; } aError = SetAttr(ni->NamespaceID(), ni->NameAtom(), ni->GetPrefixAtom(), aValue, true); } void Element::RemoveAttributeNS(const nsAString& aNamespaceURI, const nsAString& aLocalName, ErrorResult& aError) { nsCOMPtr name = NS_AtomizeMainThread(aLocalName); int32_t nsid = nsContentUtils::NameSpaceManager()->GetNameSpaceID(aNamespaceURI, nsContentUtils::IsChromeDoc(OwnerDoc())); if (nsid == kNameSpaceID_Unknown) { // If the namespace ID is unknown, it means there can't possibly be an // existing attribute. We would need a known namespace ID to pass into // UnsetAttr, so we return early if we don't have one. return; } aError = UnsetAttr(nsid, name, true); } Attr* Element::GetAttributeNodeNS(const nsAString& aNamespaceURI, const nsAString& aLocalName) { OwnerDoc()->WarnOnceAbout(nsIDocument::eGetAttributeNodeNS); return GetAttributeNodeNSInternal(aNamespaceURI, aLocalName); } Attr* Element::GetAttributeNodeNSInternal(const nsAString& aNamespaceURI, const nsAString& aLocalName) { return Attributes()->GetNamedItemNS(aNamespaceURI, aLocalName); } already_AddRefed Element::SetAttributeNodeNS(Attr& aNewAttr, ErrorResult& aError) { OwnerDoc()->WarnOnceAbout(nsIDocument::eSetAttributeNodeNS); return Attributes()->SetNamedItemNS(aNewAttr, aError); } already_AddRefed Element::GetElementsByTagNameNS(const nsAString& aNamespaceURI, const nsAString& aLocalName, ErrorResult& aError) { int32_t nameSpaceId = kNameSpaceID_Wildcard; if (!aNamespaceURI.EqualsLiteral("*")) { aError = nsContentUtils::NameSpaceManager()->RegisterNameSpace(aNamespaceURI, nameSpaceId); if (aError.Failed()) { return nullptr; } } NS_ASSERTION(nameSpaceId != kNameSpaceID_Unknown, "Unexpected namespace ID!"); return NS_GetContentList(this, nameSpaceId, aLocalName); } nsresult Element::GetElementsByTagNameNS(const nsAString& namespaceURI, const nsAString& localName, nsIDOMHTMLCollection** aResult) { mozilla::ErrorResult rv; nsCOMPtr list = GetElementsByTagNameNS(namespaceURI, localName, rv); if (rv.Failed()) { return rv.StealNSResult(); } list.forget(aResult); return NS_OK; } bool Element::HasAttributeNS(const nsAString& aNamespaceURI, const nsAString& aLocalName) const { int32_t nsid = nsContentUtils::NameSpaceManager()->GetNameSpaceID(aNamespaceURI, nsContentUtils::IsChromeDoc(OwnerDoc())); if (nsid == kNameSpaceID_Unknown) { // Unknown namespace means no attr... return false; } nsCOMPtr name = NS_AtomizeMainThread(aLocalName); return HasAttr(nsid, name); } already_AddRefed Element::GetElementsByClassName(const nsAString& aClassNames) { return nsContentUtils::GetElementsByClassName(this, aClassNames); } nsresult Element::GetElementsByClassName(const nsAString& aClassNames, nsIDOMHTMLCollection** aResult) { *aResult = nsContentUtils::GetElementsByClassName(this, aClassNames).take(); return NS_OK; } /** * Returns the count of descendants (inclusive of aContent) in * the uncomposed document that are explicitly set as editable. */ static uint32_t EditableInclusiveDescendantCount(nsIContent* aContent) { auto htmlElem = nsGenericHTMLElement::FromContent(aContent); if (htmlElem) { return htmlElem->EditableInclusiveDescendantCount(); } return aContent->EditableDescendantCount(); } nsresult Element::BindToTree(nsIDocument* aDocument, nsIContent* aParent, nsIContent* aBindingParent, bool aCompileEventHandlers) { NS_PRECONDITION(aParent || aDocument, "Must have document if no parent!"); NS_PRECONDITION((NODE_FROM(aParent, aDocument)->OwnerDoc() == OwnerDoc()), "Must have the same owner document"); NS_PRECONDITION(!aParent || aDocument == aParent->GetUncomposedDoc(), "aDocument must be current doc of aParent"); NS_PRECONDITION(!GetUncomposedDoc(), "Already have a document. Unbind first!"); // Note that as we recurse into the kids, they'll have a non-null parent. So // only assert if our parent is _changing_ while we have a parent. NS_PRECONDITION(!GetParent() || aParent == GetParent(), "Already have a parent. Unbind first!"); NS_PRECONDITION(!GetBindingParent() || aBindingParent == GetBindingParent() || (!aBindingParent && aParent && aParent->GetBindingParent() == GetBindingParent()), "Already have a binding parent. Unbind first!"); NS_PRECONDITION(!aParent || !aDocument || !aParent->HasFlag(NODE_FORCE_XBL_BINDINGS), "Parent in document but flagged as forcing XBL"); NS_PRECONDITION(aBindingParent != this, "Content must not be its own binding parent"); NS_PRECONDITION(!IsRootOfNativeAnonymousSubtree() || aBindingParent == aParent, "Native anonymous content must have its parent as its " "own binding parent"); NS_PRECONDITION(aBindingParent || !aParent || aBindingParent == aParent->GetBindingParent(), "We should be passed the right binding parent"); #ifdef MOZ_XUL // First set the binding parent nsXULElement* xulElem = nsXULElement::FromContent(this); if (xulElem) { xulElem->SetXULBindingParent(aBindingParent); } else #endif { if (aBindingParent) { nsExtendedDOMSlots* slots = ExtendedDOMSlots(); slots->mBindingParent = aBindingParent; // Weak, so no addref happens. } } NS_ASSERTION(!aBindingParent || IsRootOfNativeAnonymousSubtree() || !HasFlag(NODE_IS_IN_NATIVE_ANONYMOUS_SUBTREE) || (aParent && aParent->IsInNativeAnonymousSubtree()), "Trying to re-bind content from native anonymous subtree to " "non-native anonymous parent!"); if (aParent) { if (aParent->IsInNativeAnonymousSubtree()) { SetFlags(NODE_IS_IN_NATIVE_ANONYMOUS_SUBTREE); } if (aParent->HasFlag(NODE_CHROME_ONLY_ACCESS)) { SetFlags(NODE_CHROME_ONLY_ACCESS); } if (aParent->IsInShadowTree()) { ClearSubtreeRootPointer(); SetFlags(NODE_IS_IN_SHADOW_TREE); } ShadowRoot* parentContainingShadow = aParent->GetContainingShadow(); if (parentContainingShadow) { ExtendedDOMSlots()->mContainingShadow = parentContainingShadow; } } bool hadForceXBL = HasFlag(NODE_FORCE_XBL_BINDINGS); bool hadParent = !!GetParentNode(); // Now set the parent and set the "Force attach xbl" flag if needed. if (aParent) { if (!GetParent()) { NS_ADDREF(aParent); } mParent = aParent; if (aParent->HasFlag(NODE_FORCE_XBL_BINDINGS)) { SetFlags(NODE_FORCE_XBL_BINDINGS); } } else { mParent = aDocument; } SetParentIsContent(aParent); // XXXbz sXBL/XBL2 issue! // Finally, set the document if (aDocument) { // Notify XBL- & nsIAnonymousContentCreator-generated // anonymous content that the document is changing. // XXXbz ordering issues here? Probably not, since ChangeDocumentFor is // just pretty broken anyway.... Need to get it working. // XXXbz XBL doesn't handle this (asserts), and we don't really want // to be doing this during parsing anyway... sort this out. // aDocument->BindingManager()->ChangeDocumentFor(this, nullptr, // aDocument); // We no longer need to track the subtree pointer (and in fact we'll assert // if we do this any later). ClearSubtreeRootPointer(); // Being added to a document. SetIsInDocument(); // Unset this flag since we now really are in a document. UnsetFlags(NODE_FORCE_XBL_BINDINGS | // And clear the lazy frame construction bits. NODE_NEEDS_FRAME | NODE_DESCENDANTS_NEED_FRAMES); // And the restyle bits UnsetRestyleFlagsIfGecko(); } else if (IsInShadowTree()) { // We're not in a document, but we did get inserted into a shadow tree. // Since we won't have any restyle data in the document's restyle trackers, // don't let us get inserted with restyle bits set incorrectly. // // Also clear all the other flags that are cleared above when we do get // inserted into a document. UnsetFlags(NODE_FORCE_XBL_BINDINGS | NODE_NEEDS_FRAME | NODE_DESCENDANTS_NEED_FRAMES); UnsetRestyleFlagsIfGecko(); } else { // If we're not in the doc and not in a shadow tree, // update our subtree pointer. SetSubtreeRootPointer(aParent->SubtreeRoot()); } if (CustomElementRegistry::IsCustomElementEnabled() && IsInComposedDoc()) { // Connected callback must be enqueued whenever a custom element becomes // connected. CustomElementData* data = GetCustomElementData(); if (data) { if (data->mState == CustomElementData::State::eCustom) { nsContentUtils::EnqueueLifecycleCallback(nsIDocument::eConnected, this); } else { // Step 7.7.2.2 https://dom.spec.whatwg.org/#concept-node-insert nsContentUtils::TryToUpgradeElement(this); } } } // Propagate scoped style sheet tracking bit. if (mParent->IsContent()) { nsIContent* parent; ShadowRoot* shadowRootParent = ShadowRoot::FromNode(mParent); if (shadowRootParent) { parent = shadowRootParent->GetHost(); } else { parent = mParent->AsContent(); } bool inStyleScope = parent->IsElementInStyleScope(); SetIsElementInStyleScope(inStyleScope); SetIsElementInStyleScopeFlagOnShadowTree(inStyleScope); } // This has to be here, rather than in nsGenericHTMLElement::BindToTree, // because it has to happen after updating the parent pointer, but before // recursively binding the kids. if (IsHTMLElement()) { SetDirOnBind(this, aParent); } uint32_t editableDescendantCount = 0; // If NODE_FORCE_XBL_BINDINGS was set we might have anonymous children // that also need to be told that they are moving. nsresult rv; if (hadForceXBL) { nsBindingManager* bmgr = OwnerDoc()->BindingManager(); nsXBLBinding* contBinding = bmgr->GetBindingWithContent(this); // First check if we have a binding... if (contBinding) { nsCOMPtr anonRoot = contBinding->GetAnonymousContent(); bool allowScripts = contBinding->AllowScripts(); for (nsCOMPtr child = anonRoot->GetFirstChild(); child; child = child->GetNextSibling()) { rv = child->BindToTree(aDocument, this, this, allowScripts); NS_ENSURE_SUCCESS(rv, rv); editableDescendantCount += EditableInclusiveDescendantCount(child); } } } UpdateEditableState(false); // Now recurse into our kids for (nsIContent* child = GetFirstChild(); child; child = child->GetNextSibling()) { rv = child->BindToTree(aDocument, this, aBindingParent, aCompileEventHandlers); NS_ENSURE_SUCCESS(rv, rv); editableDescendantCount += EditableInclusiveDescendantCount(child); } if (aDocument) { // Update our editable descendant count because we don't keep track of it // for content that is not in the uncomposed document. MOZ_ASSERT(EditableDescendantCount() == 0); ChangeEditableDescendantCount(editableDescendantCount); if (!hadParent) { uint32_t editableDescendantChange = EditableInclusiveDescendantCount(this); if (editableDescendantChange != 0) { // If we are binding a subtree root to the document, we need to update // the editable descendant count of all the ancestors. nsIContent* parent = GetParent(); while (parent) { parent->ChangeEditableDescendantCount(editableDescendantChange); parent = parent->GetParent(); } } } } nsNodeUtils::ParentChainChanged(this); if (!hadParent && IsRootOfNativeAnonymousSubtree()) { nsNodeUtils::NativeAnonymousChildListChange(this, false); } if (HasID()) { AddToIdTable(DoGetID()); } if (MayHaveStyle() && !IsXULElement()) { // XXXbz if we already have a style attr parsed, this won't do // anything... need to fix that. // If MayHaveStyle() is true, we must be an nsStyledElement static_cast(this)->ReparseStyleAttribute(false); } if (aDocument) { // If we're in a document now, let our mapped attrs know what their new // sheet is. This is safe to run for non-mapped-attribute elements too; // it'll just do a small bit of unnecessary work. But most elements in // practice are mapped-attribute elements. nsHTMLStyleSheet* sheet = aDocument->GetAttributeStyleSheet(); if (sheet) { mAttrsAndChildren.SetMappedAttrStyleSheet(sheet); } } // Call BindToTree on shadow root children. ShadowRoot* shadowRoot = GetShadowRoot(); if (shadowRoot) { shadowRoot->SetIsComposedDocParticipant(IsInComposedDoc()); for (nsIContent* child = shadowRoot->GetFirstChild(); child; child = child->GetNextSibling()) { rv = child->BindToTree(nullptr, shadowRoot, shadowRoot->GetBindingParent(), aCompileEventHandlers); NS_ENSURE_SUCCESS(rv, rv); } } // It would be cleanest to mark nodes as dirty when (a) they're created and // (b) they're unbound from a tree. However, we can't easily do (a) right now, // because IsStyledByServo() is not always easy to check at node creation time, // and the bits have different meaning in the non-IsStyledByServo case. // // So for now, we just mark nodes as dirty when they're inserted into a // document or shadow tree. if (IsStyledByServo() && IsInComposedDoc()) { MOZ_ASSERT(!HasServoData()); SetIsDirtyForServo(); } // XXXbz script execution during binding can trigger some of these // postcondition asserts.... But we do want that, since things will // generally be quite broken when that happens. NS_POSTCONDITION(aDocument == GetUncomposedDoc(), "Bound to wrong document"); NS_POSTCONDITION(aParent == GetParent(), "Bound to wrong parent"); NS_POSTCONDITION(aBindingParent == GetBindingParent(), "Bound to wrong binding parent"); return NS_OK; } RemoveFromBindingManagerRunnable::RemoveFromBindingManagerRunnable(nsBindingManager* aManager, nsIContent* aContent, nsIDocument* aDoc): mManager(aManager), mContent(aContent), mDoc(aDoc) {} RemoveFromBindingManagerRunnable::~RemoveFromBindingManagerRunnable() {} NS_IMETHODIMP RemoveFromBindingManagerRunnable::Run() { // It may be the case that the element was removed from the // DOM, causing this runnable to be created, then inserted back // into the document before the this runnable had a chance to // tear down the binding. Only tear down the binding if the element // is still no longer in the DOM. nsXBLService::LoadBinding tears // down the old binding if the element is inserted back into the // DOM and loads a different binding. if (!mContent->IsInComposedDoc()) { mManager->RemovedFromDocumentInternal(mContent, mDoc, nsBindingManager::eRunDtor); } return NS_OK; } void Element::UnbindFromTree(bool aDeep, bool aNullParent) { NS_PRECONDITION(aDeep || (!GetUncomposedDoc() && !GetBindingParent()), "Shallow unbind won't clear document and binding parent on " "kids!"); RemoveFromIdTable(); // Make sure to unbind this node before doing the kids nsIDocument* document = HasFlag(NODE_FORCE_XBL_BINDINGS) ? OwnerDoc() : GetComposedDoc(); if (HasPointerLock()) { nsIDocument::UnlockPointer(); } if (mState.HasState(NS_EVENT_STATE_FULL_SCREEN)) { // The element being removed is an ancestor of the full-screen element, // exit full-screen state. nsContentUtils::ReportToConsole(nsIScriptError::warningFlag, NS_LITERAL_CSTRING("DOM"), OwnerDoc(), nsContentUtils::eDOM_PROPERTIES, "RemovedFullscreenElement"); // Fully exit full-screen. nsIDocument::ExitFullscreenInDocTree(OwnerDoc()); } if (aNullParent) { if (GetParent() && GetParent()->IsInUncomposedDoc()) { // Update the editable descendant count in the ancestors before we // lose the reference to the parent. int32_t editableDescendantChange = -1 * EditableInclusiveDescendantCount(this); if (editableDescendantChange != 0) { nsIContent* parent = GetParent(); while (parent) { parent->ChangeEditableDescendantCount(editableDescendantChange); parent = parent->GetParent(); } } } if (this->IsRootOfNativeAnonymousSubtree()) { nsNodeUtils::NativeAnonymousChildListChange(this, true); } if (GetParent()) { RefPtr p; p.swap(mParent); } else { mParent = nullptr; } SetParentIsContent(false); } #ifdef DEBUG // If we can get access to the PresContext, then we sanity-check that // we're not leaving behind a pointer to ourselves as the PresContext's // cached provider of the viewport's scrollbar styles. if (document) { nsIPresShell* presShell = document->GetShell(); if (presShell) { nsPresContext* presContext = presShell->GetPresContext(); if (presContext) { MOZ_ASSERT(this != presContext->GetViewportScrollbarStylesOverrideNode(), "Leaving behind a raw pointer to this node (as having " "propagated scrollbar styles) - that's dangerous..."); } } } #endif // Ensure that CSS transitions don't continue on an element at a // different place in the tree (even if reinserted before next // animation refresh). // We need to delete the properties while we're still in document // (if we were in document). // FIXME (Bug 522599): Need a test for this. if (MayHaveAnimations()) { DeleteProperty(nsGkAtoms::transitionsOfBeforeProperty); DeleteProperty(nsGkAtoms::transitionsOfAfterProperty); DeleteProperty(nsGkAtoms::transitionsProperty); DeleteProperty(nsGkAtoms::animationsOfBeforeProperty); DeleteProperty(nsGkAtoms::animationsOfAfterProperty); DeleteProperty(nsGkAtoms::animationsProperty); } ClearInDocument(); // Computed styled data isn't useful for detached nodes, and we'll need to // recomputed it anyway if we ever insert the nodes back into a document. if (IsStyledByServo()) { ClearServoData(); } else { #ifdef MOZ_STYLO MOZ_ASSERT(!HasServoData()); #endif } // Editable descendant count only counts descendants that // are in the uncomposed document. ResetEditableDescendantCount(); if (aNullParent || !mParent->IsInShadowTree()) { UnsetFlags(NODE_IS_IN_SHADOW_TREE); // Begin keeping track of our subtree root. SetSubtreeRootPointer(aNullParent ? this : mParent->SubtreeRoot()); } if (document) { // Notify XBL- & nsIAnonymousContentCreator-generated // anonymous content that the document is changing. // Unlike XBL, bindings for web components shadow DOM // do not get uninstalled. if (HasFlag(NODE_MAY_BE_IN_BINDING_MNGR) && !GetShadowRoot()) { nsContentUtils::AddScriptRunner( new RemoveFromBindingManagerRunnable(document->BindingManager(), this, document)); } document->ClearBoxObjectFor(this); // Disconnected must be enqueued whenever a connected custom element becomes // disconnected. if (CustomElementRegistry::IsCustomElementEnabled()) { CustomElementData* data = GetCustomElementData(); if (data) { if (data->mState == CustomElementData::State::eCustom) { nsContentUtils::EnqueueLifecycleCallback(nsIDocument::eDisconnected, this); } else { // Remove an unresolved custom element that is a candidate for // upgrade when a custom element is disconnected. // We will make sure it's shadow-including tree order in bug 1326028. nsContentUtils::UnregisterUnresolvedElement(this); } } } } // Unset this since that's what the old code effectively did. UnsetFlags(NODE_FORCE_XBL_BINDINGS); bool clearBindingParent = true; #ifdef MOZ_XUL nsXULElement* xulElem = nsXULElement::FromContent(this); if (xulElem) { xulElem->SetXULBindingParent(nullptr); clearBindingParent = false; } #endif nsExtendedDOMSlots* slots = GetExistingExtendedDOMSlots(); if (slots) { if (clearBindingParent) { slots->mBindingParent = nullptr; } if (aNullParent || !mParent->IsInShadowTree()) { slots->mContainingShadow = nullptr; } } // This has to be here, rather than in nsGenericHTMLElement::UnbindFromTree, // because it has to happen after unsetting the parent pointer, but before // recursively unbinding the kids. if (IsHTMLElement()) { ResetDir(this); } if (aDeep) { // Do the kids. Don't call GetChildCount() here since that'll force // XUL to generate template children, which there is no need for since // all we're going to do is unbind them anyway. uint32_t i, n = mAttrsAndChildren.ChildCount(); for (i = 0; i < n; ++i) { // Note that we pass false for aNullParent here, since we don't want // the kids to forget us. We _do_ want them to forget their binding // parent, though, since this only walks non-anonymous kids. mAttrsAndChildren.ChildAt(i)->UnbindFromTree(true, false); } } nsNodeUtils::ParentChainChanged(this); // Unbind children of shadow root. ShadowRoot* shadowRoot = GetShadowRoot(); if (shadowRoot) { for (nsIContent* child = shadowRoot->GetFirstChild(); child; child = child->GetNextSibling()) { child->UnbindFromTree(true, false); } shadowRoot->SetIsComposedDocParticipant(false); } } nsICSSDeclaration* Element::GetSMILOverrideStyle() { Element::nsExtendedDOMSlots* slots = ExtendedDOMSlots(); if (!slots->mSMILOverrideStyle) { slots->mSMILOverrideStyle = new nsDOMCSSAttributeDeclaration(this, true); } return slots->mSMILOverrideStyle; } DeclarationBlock* Element::GetSMILOverrideStyleDeclaration() { Element::nsExtendedDOMSlots* slots = GetExistingExtendedDOMSlots(); return slots ? slots->mSMILOverrideStyleDeclaration.get() : nullptr; } nsresult Element::SetSMILOverrideStyleDeclaration(DeclarationBlock* aDeclaration, bool aNotify) { Element::nsExtendedDOMSlots* slots = ExtendedDOMSlots(); slots->mSMILOverrideStyleDeclaration = aDeclaration; if (aNotify) { nsIDocument* doc = GetComposedDoc(); // Only need to request a restyle if we're in a document. (We might not // be in a document, if we're clearing animation effects on a target node // that's been detached since the previous animation sample.) if (doc) { nsCOMPtr shell = doc->GetShell(); if (shell) { // Pass both eRestyle_StyleAttribute and // eRestyle_StyleAttribute_Animations since we don't know if // this style represents only the ticking of an existing // animation or whether it's a new or changed animation. shell->RestyleForAnimation(this, eRestyle_StyleAttribute | eRestyle_StyleAttribute_Animations); } } } return NS_OK; } bool Element::IsLabelable() const { return false; } bool Element::IsInteractiveHTMLContent(bool aIgnoreTabindex) const { return false; } DeclarationBlock* Element::GetInlineStyleDeclaration() { return nullptr; } nsresult Element::SetInlineStyleDeclaration(DeclarationBlock* aDeclaration, const nsAString* aSerialized, bool aNotify) { NS_NOTYETIMPLEMENTED("Element::SetInlineStyleDeclaration"); return NS_ERROR_NOT_IMPLEMENTED; } NS_IMETHODIMP_(bool) Element::IsAttributeMapped(const nsIAtom* aAttribute) const { return false; } nsChangeHint Element::GetAttributeChangeHint(const nsIAtom* aAttribute, int32_t aModType) const { return nsChangeHint(0); } bool Element::FindAttributeDependence(const nsIAtom* aAttribute, const MappedAttributeEntry* const aMaps[], uint32_t aMapCount) { for (uint32_t mapindex = 0; mapindex < aMapCount; ++mapindex) { for (const MappedAttributeEntry* map = aMaps[mapindex]; map->attribute; ++map) { if (aAttribute == *map->attribute) { return true; } } } return false; } already_AddRefed Element::GetExistingAttrNameFromQName(const nsAString& aStr) const { const nsAttrName* name = InternalGetAttrNameFromQName(aStr); if (!name) { return nullptr; } RefPtr nodeInfo; if (name->IsAtom()) { nodeInfo = mNodeInfo->NodeInfoManager()-> GetNodeInfo(name->Atom(), nullptr, kNameSpaceID_None, nsIDOMNode::ATTRIBUTE_NODE); } else { nodeInfo = name->NodeInfo(); } return nodeInfo.forget(); } // static bool Element::ShouldBlur(nsIContent *aContent) { // Determine if the current element is focused, if it is not focused // then we should not try to blur nsIDocument* document = aContent->GetComposedDoc(); if (!document) return false; nsCOMPtr window = document->GetWindow(); if (!window) return false; nsCOMPtr focusedFrame; nsIContent* contentToBlur = nsFocusManager::GetFocusedDescendant(window, false, getter_AddRefs(focusedFrame)); if (contentToBlur == aContent) return true; // if focus on this element would get redirected, then check the redirected // content as well when blurring. return (contentToBlur && nsFocusManager::GetRedirectedFocus(aContent) == contentToBlur); } bool Element::IsNodeOfType(uint32_t aFlags) const { return !(aFlags & ~eCONTENT); } /* static */ nsresult Element::DispatchEvent(nsPresContext* aPresContext, WidgetEvent* aEvent, nsIContent* aTarget, bool aFullDispatch, nsEventStatus* aStatus) { NS_PRECONDITION(aTarget, "Must have target"); NS_PRECONDITION(aEvent, "Must have source event"); NS_PRECONDITION(aStatus, "Null out param?"); if (!aPresContext) { return NS_OK; } nsCOMPtr shell = aPresContext->GetPresShell(); if (!shell) { return NS_OK; } if (aFullDispatch) { return shell->HandleEventWithTarget(aEvent, nullptr, aTarget, aStatus); } return shell->HandleDOMEventWithTarget(aTarget, aEvent, aStatus); } /* static */ nsresult Element::DispatchClickEvent(nsPresContext* aPresContext, WidgetInputEvent* aSourceEvent, nsIContent* aTarget, bool aFullDispatch, const EventFlags* aExtraEventFlags, nsEventStatus* aStatus) { NS_PRECONDITION(aTarget, "Must have target"); NS_PRECONDITION(aSourceEvent, "Must have source event"); NS_PRECONDITION(aStatus, "Null out param?"); WidgetMouseEvent event(aSourceEvent->IsTrusted(), eMouseClick, aSourceEvent->mWidget, WidgetMouseEvent::eReal); event.mRefPoint = aSourceEvent->mRefPoint; uint32_t clickCount = 1; float pressure = 0; uint16_t inputSource = 0; WidgetMouseEvent* sourceMouseEvent = aSourceEvent->AsMouseEvent(); if (sourceMouseEvent) { clickCount = sourceMouseEvent->mClickCount; pressure = sourceMouseEvent->pressure; inputSource = sourceMouseEvent->inputSource; } else if (aSourceEvent->mClass == eKeyboardEventClass) { inputSource = nsIDOMMouseEvent::MOZ_SOURCE_KEYBOARD; } event.pressure = pressure; event.mClickCount = clickCount; event.inputSource = inputSource; event.mModifiers = aSourceEvent->mModifiers; if (aExtraEventFlags) { // Be careful not to overwrite existing flags! event.mFlags.Union(*aExtraEventFlags); } return DispatchEvent(aPresContext, &event, aTarget, aFullDispatch, aStatus); } nsIFrame* Element::GetPrimaryFrame(mozFlushType aType) { nsIDocument* doc = GetComposedDoc(); if (!doc) { return nullptr; } // Cause a flush, so we get up-to-date frame // information if (aType != Flush_None) { doc->FlushPendingNotifications(aType); } return GetPrimaryFrame(); } //---------------------------------------------------------------------- nsresult Element::LeaveLink(nsPresContext* aPresContext) { nsILinkHandler *handler = aPresContext->GetLinkHandler(); if (!handler) { return NS_OK; } return handler->OnLeaveLink(); } nsresult Element::SetEventHandler(nsIAtom* aEventName, const nsAString& aValue, bool aDefer) { nsIDocument *ownerDoc = OwnerDoc(); if (ownerDoc->IsLoadedAsData()) { // Make this a no-op rather than throwing an error to avoid // the error causing problems setting the attribute. return NS_OK; } NS_PRECONDITION(aEventName, "Must have event name!"); bool defer = true; EventListenerManager* manager = GetEventListenerManagerForAttr(aEventName, &defer); if (!manager) { return NS_OK; } defer = defer && aDefer; // only defer if everyone agrees... manager->SetEventHandler(aEventName, aValue, defer, !nsContentUtils::IsChromeDoc(ownerDoc), this); return NS_OK; } //---------------------------------------------------------------------- const nsAttrName* Element::InternalGetAttrNameFromQName(const nsAString& aStr, nsAutoString* aNameToUse) const { MOZ_ASSERT(!aNameToUse || aNameToUse->IsEmpty()); const nsAttrName* val = nullptr; if (IsHTMLElement() && IsInHTMLDocument()) { nsAutoString lower; nsAutoString& outStr = aNameToUse ? *aNameToUse : lower; nsContentUtils::ASCIIToLower(aStr, outStr); val = mAttrsAndChildren.GetExistingAttrNameFromQName(outStr); if (val) { outStr.Truncate(); } } else { val = mAttrsAndChildren.GetExistingAttrNameFromQName(aStr); if (!val && aNameToUse) { *aNameToUse = aStr; } } return val; } bool Element::MaybeCheckSameAttrVal(int32_t aNamespaceID, nsIAtom* aName, nsIAtom* aPrefix, const nsAttrValueOrString& aValue, bool aNotify, nsAttrValue& aOldValue, uint8_t* aModType, bool* aHasListeners, bool* aOldValueSet) { bool modification = false; *aHasListeners = aNotify && nsContentUtils::HasMutationListeners(this, NS_EVENT_BITS_MUTATION_ATTRMODIFIED, this); *aOldValueSet = false; // If we have no listeners and aNotify is false, we are almost certainly // coming from the content sink and will almost certainly have no previous // value. Even if we do, setting the value is cheap when we have no // listeners and don't plan to notify. The check for aNotify here is an // optimization, the check for *aHasListeners is a correctness issue. if (*aHasListeners || aNotify) { BorrowedAttrInfo info(GetAttrInfo(aNamespaceID, aName)); if (info.mValue) { // Check whether the old value is the same as the new one. Note that we // only need to actually _get_ the old value if we have listeners or // if the element is a custom element (because it may have an // attribute changed callback). if (*aHasListeners || GetCustomElementData()) { // Need to store the old value. // // If the current attribute value contains a pointer to some other data // structure that gets updated in the process of setting the attribute // we'll no longer have the old value of the attribute. Therefore, we // should serialize the attribute value now to keep a snapshot. // // We have to serialize the value anyway in order to create the // mutation event so there's no cost in doing it now. aOldValue.SetToSerialized(*info.mValue); *aOldValueSet = true; } bool valueMatches = aValue.EqualsAsStrings(*info.mValue); if (valueMatches && aPrefix == info.mName->GetPrefix()) { return true; } modification = true; } } *aModType = modification ? static_cast(nsIDOMMutationEvent::MODIFICATION) : static_cast(nsIDOMMutationEvent::ADDITION); return false; } bool Element::OnlyNotifySameValueSet(int32_t aNamespaceID, nsIAtom* aName, nsIAtom* aPrefix, const nsAttrValueOrString& aValue, bool aNotify, nsAttrValue& aOldValue, uint8_t* aModType, bool* aHasListeners, bool* aOldValueSet) { if (!MaybeCheckSameAttrVal(aNamespaceID, aName, aPrefix, aValue, aNotify, aOldValue, aModType, aHasListeners, aOldValueSet)) { return false; } nsAutoScriptBlocker scriptBlocker; nsNodeUtils::AttributeSetToCurrentValue(this, aNamespaceID, aName); return true; } nsresult Element::SetSingleClassFromParser(nsIAtom* aSingleClassName) { // Keep this in sync with SetAttr and SetParsedAttr below. if (!mAttrsAndChildren.CanFitMoreAttrs()) { return NS_ERROR_FAILURE; } nsAttrValue value(aSingleClassName); nsIDocument* document = GetComposedDoc(); mozAutoDocUpdate updateBatch(document, UPDATE_CONTENT_MODEL, false); // In principle, BeforeSetAttr should be called here if a node type // existed that wanted to do something special for class, but there // is no such node type, so calling SetMayHaveClass() directly. SetMayHaveClass(); return SetAttrAndNotify(kNameSpaceID_None, nsGkAtoms::_class, nullptr, // prefix nullptr, // old value value, static_cast(nsIDOMMutationEvent::ADDITION), false, // hasListeners false, // notify kCallAfterSetAttr, document, updateBatch); } nsresult Element::SetAttr(int32_t aNamespaceID, nsIAtom* aName, nsIAtom* aPrefix, const nsAString& aValue, bool aNotify) { // Keep this in sync with SetParsedAttr below and SetSingleClassFromParser // above. NS_ENSURE_ARG_POINTER(aName); NS_ASSERTION(aNamespaceID != kNameSpaceID_Unknown, "Don't call SetAttr with unknown namespace"); if (!mAttrsAndChildren.CanFitMoreAttrs()) { return NS_ERROR_FAILURE; } uint8_t modType; bool hasListeners; // We don't want to spend time preparsing class attributes if the value is not // changing, so just init our nsAttrValueOrString with aValue for the // OnlyNotifySameValueSet call. nsAttrValueOrString value(aValue); nsAttrValue oldValue; bool oldValueSet; if (OnlyNotifySameValueSet(aNamespaceID, aName, aPrefix, value, aNotify, oldValue, &modType, &hasListeners, &oldValueSet)) { return OnAttrSetButNotChanged(aNamespaceID, aName, value, aNotify); } nsAttrValue attrValue; nsAttrValue* preparsedAttrValue; if (aNamespaceID == kNameSpaceID_None && aName == nsGkAtoms::_class) { attrValue.ParseAtomArray(aValue); value.ResetToAttrValue(attrValue); preparsedAttrValue = &attrValue; } else { preparsedAttrValue = nullptr; } if (aNotify) { nsNodeUtils::AttributeWillChange(this, aNamespaceID, aName, modType, preparsedAttrValue); } // Hold a script blocker while calling ParseAttribute since that can call // out to id-observers nsIDocument* document = GetComposedDoc(); mozAutoDocUpdate updateBatch(document, UPDATE_CONTENT_MODEL, aNotify); nsresult rv = BeforeSetAttr(aNamespaceID, aName, &value, aNotify); NS_ENSURE_SUCCESS(rv, rv); if (!preparsedAttrValue && !ParseAttribute(aNamespaceID, aName, aValue, attrValue)) { attrValue.SetTo(aValue); } PreIdMaybeChange(aNamespaceID, aName, &value); return SetAttrAndNotify(aNamespaceID, aName, aPrefix, oldValueSet ? &oldValue : nullptr, attrValue, modType, hasListeners, aNotify, kCallAfterSetAttr, document, updateBatch); } nsresult Element::SetParsedAttr(int32_t aNamespaceID, nsIAtom* aName, nsIAtom* aPrefix, nsAttrValue& aParsedValue, bool aNotify) { // Keep this in sync with SetAttr and SetSingleClassFromParser above NS_ENSURE_ARG_POINTER(aName); NS_ASSERTION(aNamespaceID != kNameSpaceID_Unknown, "Don't call SetAttr with unknown namespace"); if (!mAttrsAndChildren.CanFitMoreAttrs()) { return NS_ERROR_FAILURE; } uint8_t modType; bool hasListeners; nsAttrValueOrString value(aParsedValue); nsAttrValue oldValue; bool oldValueSet; if (OnlyNotifySameValueSet(aNamespaceID, aName, aPrefix, value, aNotify, oldValue, &modType, &hasListeners, &oldValueSet)) { return OnAttrSetButNotChanged(aNamespaceID, aName, value, aNotify); } if (aNotify) { nsNodeUtils::AttributeWillChange(this, aNamespaceID, aName, modType, &aParsedValue); } nsresult rv = BeforeSetAttr(aNamespaceID, aName, &value, aNotify); NS_ENSURE_SUCCESS(rv, rv); PreIdMaybeChange(aNamespaceID, aName, &value); nsIDocument* document = GetComposedDoc(); mozAutoDocUpdate updateBatch(document, UPDATE_CONTENT_MODEL, aNotify); return SetAttrAndNotify(aNamespaceID, aName, aPrefix, oldValueSet ? &oldValue : nullptr, aParsedValue, modType, hasListeners, aNotify, kCallAfterSetAttr, document, updateBatch); } nsresult Element::SetAttrAndNotify(int32_t aNamespaceID, nsIAtom* aName, nsIAtom* aPrefix, const nsAttrValue* aOldValue, nsAttrValue& aParsedValue, uint8_t aModType, bool aFireMutation, bool aNotify, bool aCallAfterSetAttr, nsIDocument* aComposedDocument, const mozAutoDocUpdate&) { nsresult rv; nsMutationGuard::DidMutate(); // Copy aParsedValue for later use since it will be lost when we call // SetAndSwapMappedAttr below nsAttrValue valueForAfterSetAttr; if (aCallAfterSetAttr) { valueForAfterSetAttr.SetTo(aParsedValue); } bool hadValidDir = false; bool hadDirAuto = false; bool oldValueSet; if (aNamespaceID == kNameSpaceID_None) { if (aName == nsGkAtoms::dir) { hadValidDir = HasValidDir() || IsHTMLElement(nsGkAtoms::bdi); hadDirAuto = HasDirAuto(); // already takes bdi into account } // XXXbz Perhaps we should push up the attribute mapping function // stuff to Element? if (!IsAttributeMapped(aName) || !SetAndSwapMappedAttribute(aComposedDocument, aName, aParsedValue, &oldValueSet, &rv)) { rv = mAttrsAndChildren.SetAndSwapAttr(aName, aParsedValue, &oldValueSet); } } else { RefPtr ni; ni = mNodeInfo->NodeInfoManager()->GetNodeInfo(aName, aPrefix, aNamespaceID, nsIDOMNode::ATTRIBUTE_NODE); rv = mAttrsAndChildren.SetAndSwapAttr(ni, aParsedValue, &oldValueSet); } NS_ENSURE_SUCCESS(rv, rv); PostIdMaybeChange(aNamespaceID, aName, &valueForAfterSetAttr); // If the old value owns its own data, we know it is OK to keep using it. // oldValue will be null if there was no previously set value const nsAttrValue* oldValue; if (aParsedValue.StoresOwnData()) { if (oldValueSet) { oldValue = &aParsedValue; } else { oldValue = nullptr; } } else { // No need to conditionally assign null here. If there was no previously // set value for the attribute, aOldValue will already be null. oldValue = aOldValue; } if (aComposedDocument || HasFlag(NODE_FORCE_XBL_BINDINGS)) { RefPtr binding = GetXBLBinding(); if (binding) { binding->AttributeChanged(aName, aNamespaceID, false, aNotify); } } if (CustomElementRegistry::IsCustomElementEnabled()) { if (CustomElementData* data = GetCustomElementData()) { if (CustomElementDefinition* definition = nsContentUtils::GetElementDefinitionIfObservingAttr(this, data->GetCustomElementType(), aName)) { MOZ_ASSERT(data->mState == CustomElementData::State::eCustom, "AttributeChanged callback should fire only if " "custom element state is custom"); nsCOMPtr oldValueAtom; if (oldValue) { oldValueAtom = oldValue->GetAsAtom(); } else { // If there is no old value, get the value of the uninitialized attribute // that was swapped with aParsedValue. oldValueAtom = aParsedValue.GetAsAtom(); } nsCOMPtr newValueAtom = valueForAfterSetAttr.GetAsAtom(); nsAutoString ns; nsContentUtils::NameSpaceManager()->GetNameSpaceURI(aNamespaceID, ns); LifecycleCallbackArgs args = { nsDependentAtomString(aName), aModType == nsIDOMMutationEvent::ADDITION ? NullString() : nsDependentAtomString(oldValueAtom), nsDependentAtomString(newValueAtom), (ns.IsEmpty() ? NullString() : ns) }; nsContentUtils::EnqueueLifecycleCallback(nsIDocument::eAttributeChanged, this, &args, nullptr, definition); } } } if (aCallAfterSetAttr) { rv = AfterSetAttr(aNamespaceID, aName, &valueForAfterSetAttr, oldValue, aNotify); NS_ENSURE_SUCCESS(rv, rv); if (aNamespaceID == kNameSpaceID_None && aName == nsGkAtoms::dir) { OnSetDirAttr(this, &valueForAfterSetAttr, hadValidDir, hadDirAuto, aNotify); } } UpdateState(aNotify); if (aNotify) { // Don't pass aOldValue to AttributeChanged since it may not be reliable. // Callers only compute aOldValue under certain conditions which may not // be triggered by all nsIMutationObservers. nsNodeUtils::AttributeChanged(this, aNamespaceID, aName, aModType, aParsedValue.StoresOwnData() ? &aParsedValue : nullptr); } if (aFireMutation) { InternalMutationEvent mutation(true, eLegacyAttrModified); nsAutoString ns; nsContentUtils::NameSpaceManager()->GetNameSpaceURI(aNamespaceID, ns); Attr* attrNode = GetAttributeNodeNSInternal(ns, nsDependentAtomString(aName)); mutation.mRelatedNode = attrNode; mutation.mAttrName = aName; nsAutoString newValue; GetAttr(aNamespaceID, aName, newValue); if (!newValue.IsEmpty()) { mutation.mNewAttrValue = NS_Atomize(newValue); } if (oldValue && !oldValue->IsEmptyString()) { mutation.mPrevAttrValue = oldValue->GetAsAtom(); } mutation.mAttrChange = aModType; mozAutoSubtreeModified subtree(OwnerDoc(), this); (new AsyncEventDispatcher(this, mutation))->RunDOMEventWhenSafe(); } return NS_OK; } bool Element::ParseAttribute(int32_t aNamespaceID, nsIAtom* aAttribute, const nsAString& aValue, nsAttrValue& aResult) { if (aNamespaceID == kNameSpaceID_None) { MOZ_ASSERT(aAttribute != nsGkAtoms::_class, "The class attribute should be preparsed and therefore should " "never be passed to Element::ParseAttribute"); if (aAttribute == nsGkAtoms::id) { // Store id as an atom. id="" means that the element has no id, // not that it has an emptystring as the id. if (aValue.IsEmpty()) { return false; } aResult.ParseAtom(aValue); return true; } } return false; } bool Element::SetAndSwapMappedAttribute(nsIDocument* aDocument, nsIAtom* aName, nsAttrValue& aValue, bool* aValueWasSet, nsresult* aRetval) { *aRetval = NS_OK; return false; } nsresult Element::BeforeSetAttr(int32_t aNamespaceID, nsIAtom* aName, const nsAttrValueOrString* aValue, bool aNotify) { if (aNamespaceID == kNameSpaceID_None) { if (aName == nsGkAtoms::_class) { if (aValue) { // Note: This flag is asymmetrical. It is never unset and isn't exact. // If it is ever made to be exact, we probably need to handle this // similarly to how ids are handled in PreIdMaybeChange and // PostIdMaybeChange. // Note that SetSingleClassFromParser inlines BeforeSetAttr and // calls SetMayHaveClass directly. Making a subclass take action // on the class attribute in a BeforeSetAttr override would // require revising SetSingleClassFromParser. SetMayHaveClass(); } } } return NS_OK; } void Element::PreIdMaybeChange(int32_t aNamespaceID, nsIAtom* aName, const nsAttrValueOrString* aValue) { if (aNamespaceID != kNameSpaceID_None || aName != nsGkAtoms::id) { return; } RemoveFromIdTable(); return; } void Element::PostIdMaybeChange(int32_t aNamespaceID, nsIAtom* aName, const nsAttrValue* aValue) { if (aNamespaceID != kNameSpaceID_None || aName != nsGkAtoms::id) { return; } // id="" means that the element has no id, not that it has an empty // string as the id. if (aValue && !aValue->IsEmptyString()) { SetHasID(); AddToIdTable(aValue->GetAtomValue()); } else { ClearHasID(); } return; } EventListenerManager* Element::GetEventListenerManagerForAttr(nsIAtom* aAttrName, bool* aDefer) { *aDefer = true; return GetOrCreateListenerManager(); } BorrowedAttrInfo Element::GetAttrInfo(int32_t aNamespaceID, nsIAtom* aName) const { NS_ASSERTION(nullptr != aName, "must have attribute name"); NS_ASSERTION(aNamespaceID != kNameSpaceID_Unknown, "must have a real namespace ID!"); int32_t index = mAttrsAndChildren.IndexOfAttr(aName, aNamespaceID); if (index < 0) { return BorrowedAttrInfo(nullptr, nullptr); } return mAttrsAndChildren.AttrInfoAt(index); } BorrowedAttrInfo Element::GetAttrInfoAt(uint32_t aIndex) const { if (aIndex >= mAttrsAndChildren.AttrCount()) { return BorrowedAttrInfo(nullptr, nullptr); } return mAttrsAndChildren.AttrInfoAt(aIndex); } bool Element::GetAttr(int32_t aNameSpaceID, nsIAtom* aName, nsAString& aResult) const { DOMString str; bool haveAttr = GetAttr(aNameSpaceID, aName, str); str.ToString(aResult); return haveAttr; } int32_t Element::FindAttrValueIn(int32_t aNameSpaceID, nsIAtom* aName, AttrValuesArray* aValues, nsCaseTreatment aCaseSensitive) const { NS_ASSERTION(aName, "Must have attr name"); NS_ASSERTION(aNameSpaceID != kNameSpaceID_Unknown, "Must have namespace"); NS_ASSERTION(aValues, "Null value array"); const nsAttrValue* val = mAttrsAndChildren.GetAttr(aName, aNameSpaceID); if (val) { for (int32_t i = 0; aValues[i]; ++i) { if (val->Equals(*aValues[i], aCaseSensitive)) { return i; } } return ATTR_VALUE_NO_MATCH; } return ATTR_MISSING; } nsresult Element::UnsetAttr(int32_t aNameSpaceID, nsIAtom* aName, bool aNotify) { NS_ASSERTION(nullptr != aName, "must have attribute name"); int32_t index = mAttrsAndChildren.IndexOfAttr(aName, aNameSpaceID); if (index < 0) { return NS_OK; } nsIDocument *document = GetComposedDoc(); mozAutoDocUpdate updateBatch(document, UPDATE_CONTENT_MODEL, aNotify); if (aNotify) { nsNodeUtils::AttributeWillChange(this, aNameSpaceID, aName, nsIDOMMutationEvent::REMOVAL, nullptr); } nsresult rv = BeforeSetAttr(aNameSpaceID, aName, nullptr, aNotify); NS_ENSURE_SUCCESS(rv, rv); bool hasMutationListeners = aNotify && nsContentUtils::HasMutationListeners(this, NS_EVENT_BITS_MUTATION_ATTRMODIFIED, this); PreIdMaybeChange(aNameSpaceID, aName, nullptr); // Grab the attr node if needed before we remove it from the attr map RefPtr attrNode; if (hasMutationListeners) { nsAutoString ns; nsContentUtils::NameSpaceManager()->GetNameSpaceURI(aNameSpaceID, ns); attrNode = GetAttributeNodeNSInternal(ns, nsDependentAtomString(aName)); } // Clear binding to nsIDOMMozNamedAttrMap nsDOMSlots *slots = GetExistingDOMSlots(); if (slots && slots->mAttributeMap) { slots->mAttributeMap->DropAttribute(aNameSpaceID, aName); } // The id-handling code, and in the future possibly other code, need to // react to unexpected attribute changes. nsMutationGuard::DidMutate(); bool hadValidDir = false; bool hadDirAuto = false; if (aNameSpaceID == kNameSpaceID_None && aName == nsGkAtoms::dir) { hadValidDir = HasValidDir() || IsHTMLElement(nsGkAtoms::bdi); hadDirAuto = HasDirAuto(); // already takes bdi into account } nsAttrValue oldValue; rv = mAttrsAndChildren.RemoveAttrAt(index, oldValue); NS_ENSURE_SUCCESS(rv, rv); PostIdMaybeChange(aNameSpaceID, aName, nullptr); if (document || HasFlag(NODE_FORCE_XBL_BINDINGS)) { RefPtr binding = GetXBLBinding(); if (binding) { binding->AttributeChanged(aName, aNameSpaceID, true, aNotify); } } if (CustomElementRegistry::IsCustomElementEnabled()) { if (CustomElementData* data = GetCustomElementData()) { if (CustomElementDefinition* definition = nsContentUtils::GetElementDefinitionIfObservingAttr(this, data->GetCustomElementType(), aName)) { MOZ_ASSERT(data->mState == CustomElementData::State::eCustom, "AttributeChanged callback should fire only if " "custom element state is custom"); nsAutoString ns; nsContentUtils::NameSpaceManager()->GetNameSpaceURI(aNameSpaceID, ns); nsCOMPtr oldValueAtom = oldValue.GetAsAtom(); LifecycleCallbackArgs args = { nsDependentAtomString(aName), nsDependentAtomString(oldValueAtom), NullString(), (ns.IsEmpty() ? NullString() : ns) }; nsContentUtils::EnqueueLifecycleCallback(nsIDocument::eAttributeChanged, this, &args, nullptr, definition); } } } rv = AfterSetAttr(aNameSpaceID, aName, nullptr, &oldValue, aNotify); NS_ENSURE_SUCCESS(rv, rv); UpdateState(aNotify); if (aNotify) { // We can always pass oldValue here since there is no new value which could // have corrupted it. nsNodeUtils::AttributeChanged(this, aNameSpaceID, aName, nsIDOMMutationEvent::REMOVAL, &oldValue); } if (aNameSpaceID == kNameSpaceID_None && aName == nsGkAtoms::dir) { OnSetDirAttr(this, nullptr, hadValidDir, hadDirAuto, aNotify); } if (hasMutationListeners) { InternalMutationEvent mutation(true, eLegacyAttrModified); mutation.mRelatedNode = attrNode; mutation.mAttrName = aName; nsAutoString value; oldValue.ToString(value); if (!value.IsEmpty()) mutation.mPrevAttrValue = NS_Atomize(value); mutation.mAttrChange = nsIDOMMutationEvent::REMOVAL; mozAutoSubtreeModified subtree(OwnerDoc(), this); (new AsyncEventDispatcher(this, mutation))->RunDOMEventWhenSafe(); } return NS_OK; } const nsAttrName* Element::GetAttrNameAt(uint32_t aIndex) const { return mAttrsAndChildren.GetSafeAttrNameAt(aIndex); } uint32_t Element::GetAttrCount() const { return mAttrsAndChildren.AttrCount(); } void Element::DescribeAttribute(uint32_t index, nsAString& aOutDescription) const { // name mAttrsAndChildren.AttrNameAt(index)->GetQualifiedName(aOutDescription); // value aOutDescription.AppendLiteral("=\""); nsAutoString value; mAttrsAndChildren.AttrAt(index)->ToString(value); for (uint32_t i = value.Length(); i > 0; --i) { if (value[i - 1] == char16_t('"')) value.Insert(char16_t('\\'), i - 1); } aOutDescription.Append(value); aOutDescription.Append('"'); } #ifdef DEBUG void Element::ListAttributes(FILE* out) const { uint32_t index, count = mAttrsAndChildren.AttrCount(); for (index = 0; index < count; index++) { nsAutoString attributeDescription; DescribeAttribute(index, attributeDescription); fputs(" ", out); fputs(NS_LossyConvertUTF16toASCII(attributeDescription).get(), out); } } void Element::List(FILE* out, int32_t aIndent, const nsCString& aPrefix) const { int32_t indent; for (indent = aIndent; --indent >= 0; ) fputs(" ", out); fputs(aPrefix.get(), out); fputs(NS_LossyConvertUTF16toASCII(mNodeInfo->QualifiedName()).get(), out); fprintf(out, "@%p", (void *)this); ListAttributes(out); fprintf(out, " state=[%llx]", static_cast(State().GetInternalValue())); fprintf(out, " flags=[%08x]", static_cast(GetFlags())); if (IsCommonAncestorForRangeInSelection()) { nsRange::RangeHashTable* ranges = static_cast(GetProperty(nsGkAtoms::range)); fprintf(out, " ranges:%d", ranges ? ranges->Count() : 0); } fprintf(out, " primaryframe=%p", static_cast(GetPrimaryFrame())); fprintf(out, " refcount=%" PRIuPTR "<", mRefCnt.get()); nsIContent* child = GetFirstChild(); if (child) { fputs("\n", out); for (; child; child = child->GetNextSibling()) { child->List(out, aIndent + 1); } for (indent = aIndent; --indent >= 0; ) fputs(" ", out); } fputs(">\n", out); Element* nonConstThis = const_cast(this); // XXX sXBL/XBL2 issue! Owner or current document? nsIDocument *document = OwnerDoc(); // Note: not listing nsIAnonymousContentCreator-created content... nsBindingManager* bindingManager = document->BindingManager(); nsCOMPtr anonymousChildren; bindingManager->GetAnonymousNodesFor(nonConstThis, getter_AddRefs(anonymousChildren)); if (anonymousChildren) { uint32_t length = 0; anonymousChildren->GetLength(&length); for (indent = aIndent; --indent >= 0; ) fputs(" ", out); fputs("anonymous-children<\n", out); for (uint32_t i = 0; i < length; ++i) { nsCOMPtr node; anonymousChildren->Item(i, getter_AddRefs(node)); nsCOMPtr child = do_QueryInterface(node); child->List(out, aIndent + 1); } for (indent = aIndent; --indent >= 0; ) fputs(" ", out); fputs(">\n", out); bool outHeader = false; ExplicitChildIterator iter(nonConstThis); for (nsIContent* child = iter.GetNextChild(); child; child = iter.GetNextChild()) { if (!outHeader) { outHeader = true; for (indent = aIndent; --indent >= 0; ) fputs(" ", out); fputs("content-list<\n", out); } child->List(out, aIndent + 1); } if (outHeader) { for (indent = aIndent; --indent >= 0; ) fputs(" ", out); fputs(">\n", out); } } } void Element::DumpContent(FILE* out, int32_t aIndent, bool aDumpAll) const { int32_t indent; for (indent = aIndent; --indent >= 0; ) fputs(" ", out); const nsString& buf = mNodeInfo->QualifiedName(); fputs("<", out); fputs(NS_LossyConvertUTF16toASCII(buf).get(), out); if(aDumpAll) ListAttributes(out); fputs(">", out); if(aIndent) fputs("\n", out); for (nsIContent* child = GetFirstChild(); child; child = child->GetNextSibling()) { int32_t indent = aIndent ? aIndent + 1 : 0; child->DumpContent(out, indent, aDumpAll); } for (indent = aIndent; --indent >= 0; ) fputs(" ", out); fputs("", out); if(aIndent) fputs("\n", out); } #endif void Element::Describe(nsAString& aOutDescription) const { aOutDescription.Append(mNodeInfo->QualifiedName()); aOutDescription.AppendPrintf("@%p", (void *)this); uint32_t index, count = mAttrsAndChildren.AttrCount(); for (index = 0; index < count; index++) { aOutDescription.Append(' '); nsAutoString attributeDescription; DescribeAttribute(index, attributeDescription); aOutDescription.Append(attributeDescription); } } bool Element::CheckHandleEventForLinksPrecondition(EventChainVisitor& aVisitor, nsIURI** aURI) const { if (aVisitor.mEventStatus == nsEventStatus_eConsumeNoDefault || (!aVisitor.mEvent->IsTrusted() && (aVisitor.mEvent->mMessage != eMouseClick) && (aVisitor.mEvent->mMessage != eKeyPress) && (aVisitor.mEvent->mMessage != eLegacyDOMActivate)) || !aVisitor.mPresContext || aVisitor.mEvent->mFlags.mMultipleActionsPrevented) { return false; } // Make sure we actually are a link return IsLink(aURI); } nsresult Element::GetEventTargetParentForLinks(EventChainPreVisitor& aVisitor) { // Optimisation: return early if this event doesn't interest us. // IMPORTANT: this switch and the switch below it must be kept in sync! switch (aVisitor.mEvent->mMessage) { case eMouseOver: case eFocus: case eMouseOut: case eBlur: break; default: return NS_OK; } // Make sure we meet the preconditions before continuing nsCOMPtr absURI; if (!CheckHandleEventForLinksPrecondition(aVisitor, getter_AddRefs(absURI))) { return NS_OK; } nsresult rv = NS_OK; // We do the status bar updates in GetEventTargetParent so that the status bar // gets updated even if the event is consumed before we have a chance to set // it. switch (aVisitor.mEvent->mMessage) { // Set the status bar similarly for mouseover and focus case eMouseOver: aVisitor.mEventStatus = nsEventStatus_eConsumeNoDefault; MOZ_FALLTHROUGH; case eFocus: { InternalFocusEvent* focusEvent = aVisitor.mEvent->AsFocusEvent(); if (!focusEvent || !focusEvent->mIsRefocus) { nsAutoString target; GetLinkTarget(target); nsContentUtils::TriggerLink(this, aVisitor.mPresContext, absURI, target, false, true, true); // Make sure any ancestor links don't also TriggerLink aVisitor.mEvent->mFlags.mMultipleActionsPrevented = true; } break; } case eMouseOut: aVisitor.mEventStatus = nsEventStatus_eConsumeNoDefault; MOZ_FALLTHROUGH; case eBlur: rv = LeaveLink(aVisitor.mPresContext); if (NS_SUCCEEDED(rv)) { aVisitor.mEvent->mFlags.mMultipleActionsPrevented = true; } break; default: // switch not in sync with the optimization switch earlier in this function NS_NOTREACHED("switch statements not in sync"); return NS_ERROR_UNEXPECTED; } return rv; } nsresult Element::PostHandleEventForLinks(EventChainPostVisitor& aVisitor) { // Optimisation: return early if this event doesn't interest us. // IMPORTANT: this switch and the switch below it must be kept in sync! switch (aVisitor.mEvent->mMessage) { case eMouseDown: case eMouseClick: case eLegacyDOMActivate: case eKeyPress: break; default: return NS_OK; } // Make sure we meet the preconditions before continuing nsCOMPtr absURI; if (!CheckHandleEventForLinksPrecondition(aVisitor, getter_AddRefs(absURI))) { return NS_OK; } nsresult rv = NS_OK; switch (aVisitor.mEvent->mMessage) { case eMouseDown: { if (aVisitor.mEvent->AsMouseEvent()->button == WidgetMouseEvent::eLeftButton) { // don't make the link grab the focus if there is no link handler nsILinkHandler *handler = aVisitor.mPresContext->GetLinkHandler(); nsIDocument *document = GetComposedDoc(); if (handler && document) { nsIFocusManager* fm = nsFocusManager::GetFocusManager(); if (fm) { aVisitor.mEvent->mFlags.mMultipleActionsPrevented = true; nsCOMPtr elem = do_QueryInterface(this); fm->SetFocus(elem, nsIFocusManager::FLAG_BYMOUSE | nsIFocusManager::FLAG_NOSCROLL); } EventStateManager::SetActiveManager( aVisitor.mPresContext->EventStateManager(), this); } } } break; case eMouseClick: { WidgetMouseEvent* mouseEvent = aVisitor.mEvent->AsMouseEvent(); if (mouseEvent->IsLeftClickEvent()) { if (mouseEvent->IsControl() || mouseEvent->IsMeta() || mouseEvent->IsAlt() ||mouseEvent->IsShift()) { break; } // The default action is simply to dispatch DOMActivate nsCOMPtr shell = aVisitor.mPresContext->GetPresShell(); if (shell) { // single-click nsEventStatus status = nsEventStatus_eIgnore; // DOMActive event should be trusted since the activation is actually // occurred even if the cause is an untrusted click event. InternalUIEvent actEvent(true, eLegacyDOMActivate, mouseEvent); actEvent.mDetail = 1; rv = shell->HandleDOMEventWithTarget(this, &actEvent, &status); if (NS_SUCCEEDED(rv)) { aVisitor.mEventStatus = nsEventStatus_eConsumeNoDefault; } } } break; } case eLegacyDOMActivate: { if (aVisitor.mEvent->mOriginalTarget == this) { nsAutoString target; GetLinkTarget(target); const InternalUIEvent* activeEvent = aVisitor.mEvent->AsUIEvent(); MOZ_ASSERT(activeEvent); nsContentUtils::TriggerLink(this, aVisitor.mPresContext, absURI, target, true, true, activeEvent->IsTrustable()); aVisitor.mEventStatus = nsEventStatus_eConsumeNoDefault; } } break; case eKeyPress: { WidgetKeyboardEvent* keyEvent = aVisitor.mEvent->AsKeyboardEvent(); if (keyEvent && keyEvent->mKeyCode == NS_VK_RETURN) { nsEventStatus status = nsEventStatus_eIgnore; rv = DispatchClickEvent(aVisitor.mPresContext, keyEvent, this, false, nullptr, &status); if (NS_SUCCEEDED(rv)) { aVisitor.mEventStatus = nsEventStatus_eConsumeNoDefault; } } } break; default: // switch not in sync with the optimization switch earlier in this function NS_NOTREACHED("switch statements not in sync"); return NS_ERROR_UNEXPECTED; } return rv; } void Element::GetLinkTarget(nsAString& aTarget) { aTarget.Truncate(); } static void nsDOMTokenListPropertyDestructor(void *aObject, nsIAtom *aProperty, void *aPropertyValue, void *aData) { nsDOMTokenList* list = static_cast(aPropertyValue); NS_RELEASE(list); } static nsIAtom** sPropertiesToTraverseAndUnlink[] = { &nsGkAtoms::sandbox, &nsGkAtoms::sizes, &nsGkAtoms::dirAutoSetBy, nullptr }; // static nsIAtom*** Element::HTMLSVGPropertiesToTraverseAndUnlink() { return sPropertiesToTraverseAndUnlink; } nsDOMTokenList* Element::GetTokenList(nsIAtom* aAtom, const DOMTokenListSupportedTokenArray aSupportedTokens) { #ifdef DEBUG nsIAtom*** props = HTMLSVGPropertiesToTraverseAndUnlink(); bool found = false; for (uint32_t i = 0; props[i]; ++i) { if (*props[i] == aAtom) { found = true; break; } } MOZ_ASSERT(found, "Trying to use an unknown tokenlist!"); #endif nsDOMTokenList* list = nullptr; if (HasProperties()) { list = static_cast(GetProperty(aAtom)); } if (!list) { list = new nsDOMTokenList(this, aAtom, aSupportedTokens); NS_ADDREF(list); SetProperty(aAtom, list, nsDOMTokenListPropertyDestructor); } return list; } Element* Element::Closest(const nsAString& aSelector, ErrorResult& aResult) { nsCSSSelectorList* selectorList = ParseSelectorList(aSelector, aResult); if (!selectorList) { // Either we failed (and aResult already has the exception), or this // is a pseudo-element-only selector that matches nothing. return nullptr; } OwnerDoc()->FlushPendingLinkUpdates(); TreeMatchContext matchingContext(false, nsRuleWalker::eRelevantLinkUnvisited, OwnerDoc(), TreeMatchContext::eNeverMatchVisited); matchingContext.SetHasSpecifiedScope(); matchingContext.AddScopeElement(this); for (nsINode* node = this; node; node = node->GetParentNode()) { if (node->IsElement() && nsCSSRuleProcessor::SelectorListMatches(node->AsElement(), matchingContext, selectorList)) { return node->AsElement(); } } return nullptr; } bool Element::Matches(const nsAString& aSelector, ErrorResult& aError) { nsCSSSelectorList* selectorList = ParseSelectorList(aSelector, aError); if (!selectorList) { // Either we failed (and aError already has the exception), or this // is a pseudo-element-only selector that matches nothing. return false; } OwnerDoc()->FlushPendingLinkUpdates(); TreeMatchContext matchingContext(false, nsRuleWalker::eRelevantLinkUnvisited, OwnerDoc(), TreeMatchContext::eNeverMatchVisited); matchingContext.SetHasSpecifiedScope(); matchingContext.AddScopeElement(this); return nsCSSRuleProcessor::SelectorListMatches(this, matchingContext, selectorList); } static const nsAttrValue::EnumTable kCORSAttributeTable[] = { // Order matters here // See ParseCORSValue { "anonymous", CORS_ANONYMOUS }, { "use-credentials", CORS_USE_CREDENTIALS }, { nullptr, 0 } }; /* static */ void Element::ParseCORSValue(const nsAString& aValue, nsAttrValue& aResult) { DebugOnly success = aResult.ParseEnumValue(aValue, kCORSAttributeTable, false, // default value is anonymous if aValue is // not a value we understand &kCORSAttributeTable[0]); MOZ_ASSERT(success); } /* static */ CORSMode Element::StringToCORSMode(const nsAString& aValue) { if (aValue.IsVoid()) { return CORS_NONE; } nsAttrValue val; Element::ParseCORSValue(aValue, val); return CORSMode(val.GetEnumValue()); } /* static */ CORSMode Element::AttrValueToCORSMode(const nsAttrValue* aValue) { if (!aValue) { return CORS_NONE; } return CORSMode(aValue->GetEnumValue()); } static const char* GetFullScreenError(nsIDocument* aDoc) { if (aDoc->NodePrincipal()->GetAppStatus() >= nsIPrincipal::APP_STATUS_INSTALLED) { // Request is in a web app and in the same origin as the web app. // Don't enforce as strict security checks for web apps, the user // is supposed to have trust in them. However documents cross-origin // to the web app must still confirm to the normal security checks. return nullptr; } if (!nsContentUtils::IsRequestFullScreenAllowed()) { return "FullscreenDeniedNotInputDriven"; } return nullptr; } void Element::RequestFullscreen(ErrorResult& aError) { // Only grant full-screen requests if this is called from inside a trusted // event handler (i.e. inside an event handler for a user initiated event). // This stops the full-screen from being abused similar to the popups of old, // and it also makes it harder for bad guys' script to go full-screen and // spoof the browser chrome/window and phish logins etc. // Note that requests for fullscreen inside a web app's origin are exempt // from this restriction. if (const char* error = GetFullScreenError(OwnerDoc())) { OwnerDoc()->DispatchFullscreenError(error); return; } auto request = MakeUnique(this); request->mIsCallerChrome = nsContentUtils::IsCallerChrome(); OwnerDoc()->AsyncRequestFullScreen(Move(request)); } void Element::RequestPointerLock() { OwnerDoc()->RequestPointerLock(this); } void Element::GetGridFragments(nsTArray>& aResult) { nsGridContainerFrame* frame = nsGridContainerFrame::GetGridFrameWithComputedInfo(GetPrimaryFrame()); // If we get a nsGridContainerFrame from the prior call, // all the next-in-flow frames will also be nsGridContainerFrames. while (frame) { aResult.AppendElement( new Grid(this, frame) ); frame = static_cast(frame->GetNextInFlow()); } } already_AddRefed Element::Animate(JSContext* aContext, JS::Handle aKeyframes, const UnrestrictedDoubleOrKeyframeAnimationOptions& aOptions, ErrorResult& aError) { Nullable target; target.SetValue().SetAsElement() = this; return Animate(target, aContext, aKeyframes, aOptions, aError); } /* static */ already_AddRefed Element::Animate(const Nullable& aTarget, JSContext* aContext, JS::Handle aKeyframes, const UnrestrictedDoubleOrKeyframeAnimationOptions& aOptions, ErrorResult& aError) { MOZ_ASSERT(!aTarget.IsNull() && (aTarget.Value().IsElement() || aTarget.Value().IsCSSPseudoElement()), "aTarget should be initialized"); RefPtr referenceElement; if (aTarget.Value().IsElement()) { referenceElement = &aTarget.Value().GetAsElement(); } else { referenceElement = aTarget.Value().GetAsCSSPseudoElement().ParentElement(); } nsCOMPtr ownerGlobal = referenceElement->GetOwnerGlobal(); if (!ownerGlobal) { aError.Throw(NS_ERROR_FAILURE); return nullptr; } GlobalObject global(aContext, ownerGlobal->GetGlobalJSObject()); MOZ_ASSERT(!global.Failed()); // Wrap the aKeyframes object for the cross-compartment case. JS::Rooted keyframes(aContext); keyframes = aKeyframes; Maybe ac; if (js::GetContextCompartment(aContext) != js::GetObjectCompartment(ownerGlobal->GetGlobalJSObject())) { ac.emplace(aContext, ownerGlobal->GetGlobalJSObject()); if (!JS_WrapObject(aContext, &keyframes)) { return nullptr; } } RefPtr effect = KeyframeEffect::Constructor(global, aTarget, keyframes, aOptions, aError); if (aError.Failed()) { return nullptr; } AnimationTimeline* timeline = referenceElement->OwnerDoc()->Timeline(); RefPtr animation = Animation::Constructor(global, effect, Optional(timeline), aError); if (aError.Failed()) { return nullptr; } if (aOptions.IsKeyframeAnimationOptions()) { animation->SetId(aOptions.GetAsKeyframeAnimationOptions().mId); } animation->Play(aError, Animation::LimitBehavior::AutoRewind); if (aError.Failed()) { return nullptr; } return animation.forget(); } void Element::GetAnimations(const AnimationFilter& filter, nsTArray>& aAnimations) { nsIDocument* doc = GetComposedDoc(); if (doc) { doc->FlushPendingNotifications(Flush_Style); } Element* elem = this; CSSPseudoElementType pseudoType = CSSPseudoElementType::NotPseudo; // For animations on generated-content elements, the animations are stored // on the parent element. if (IsGeneratedContentContainerForBefore()) { elem = GetParentElement(); pseudoType = CSSPseudoElementType::before; } else if (IsGeneratedContentContainerForAfter()) { elem = GetParentElement(); pseudoType = CSSPseudoElementType::after; } if (!elem) { return; } if (!filter.mSubtree || pseudoType == CSSPseudoElementType::before || pseudoType == CSSPseudoElementType::after) { GetAnimationsUnsorted(elem, pseudoType, aAnimations); } else { for (nsIContent* node = this; node; node = node->GetNextNode(this)) { if (!node->IsElement()) { continue; } Element* element = node->AsElement(); Element::GetAnimationsUnsorted(element, CSSPseudoElementType::NotPseudo, aAnimations); Element::GetAnimationsUnsorted(element, CSSPseudoElementType::before, aAnimations); Element::GetAnimationsUnsorted(element, CSSPseudoElementType::after, aAnimations); } } aAnimations.Sort(AnimationPtrComparator>()); } /* static */ void Element::GetAnimationsUnsorted(Element* aElement, CSSPseudoElementType aPseudoType, nsTArray>& aAnimations) { MOZ_ASSERT(aPseudoType == CSSPseudoElementType::NotPseudo || aPseudoType == CSSPseudoElementType::after || aPseudoType == CSSPseudoElementType::before, "Unsupported pseudo type"); MOZ_ASSERT(aElement, "Null element"); EffectSet* effects = EffectSet::GetEffectSet(aElement, aPseudoType); if (!effects) { return; } for (KeyframeEffectReadOnly* effect : *effects) { MOZ_ASSERT(effect && effect->GetAnimation(), "Only effects associated with an animation should be " "added to an element's effect set"); Animation* animation = effect->GetAnimation(); MOZ_ASSERT(animation->IsRelevant(), "Only relevant animations should be added to an element's " "effect set"); aAnimations.AppendElement(animation); } } NS_IMETHODIMP Element::GetInnerHTML(nsAString& aInnerHTML) { GetMarkup(false, aInnerHTML); return NS_OK; } void Element::SetInnerHTML(const nsAString& aInnerHTML, ErrorResult& aError) { SetInnerHTMLInternal(aInnerHTML, aError); } void Element::GetOuterHTML(nsAString& aOuterHTML) { GetMarkup(true, aOuterHTML); } void Element::SetOuterHTML(const nsAString& aOuterHTML, ErrorResult& aError) { nsCOMPtr parent = GetParentNode(); if (!parent) { return; } if (parent->NodeType() == nsIDOMNode::DOCUMENT_NODE) { aError.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR); return; } if (OwnerDoc()->IsHTMLDocument()) { nsIAtom* localName; int32_t namespaceID; if (parent->IsElement()) { localName = parent->NodeInfo()->NameAtom(); namespaceID = parent->NodeInfo()->NamespaceID(); } else { NS_ASSERTION(parent->NodeType() == nsIDOMNode::DOCUMENT_FRAGMENT_NODE, "How come the parent isn't a document, a fragment or an element?"); localName = nsGkAtoms::body; namespaceID = kNameSpaceID_XHTML; } RefPtr fragment = new DocumentFragment(OwnerDoc()->NodeInfoManager()); nsContentUtils::ParseFragmentHTML(aOuterHTML, fragment, localName, namespaceID, OwnerDoc()->GetCompatibilityMode() == eCompatibility_NavQuirks, true); parent->ReplaceChild(*fragment, *this, aError); return; } nsCOMPtr context; if (parent->IsElement()) { context = parent; } else { NS_ASSERTION(parent->NodeType() == nsIDOMNode::DOCUMENT_FRAGMENT_NODE, "How come the parent isn't a document, a fragment or an element?"); RefPtr info = OwnerDoc()->NodeInfoManager()->GetNodeInfo(nsGkAtoms::body, nullptr, kNameSpaceID_XHTML, nsIDOMNode::ELEMENT_NODE); context = NS_NewHTMLBodyElement(info.forget(), FROM_PARSER_FRAGMENT); } nsCOMPtr df; aError = nsContentUtils::CreateContextualFragment(context, aOuterHTML, true, getter_AddRefs(df)); if (aError.Failed()) { return; } nsCOMPtr fragment = do_QueryInterface(df); parent->ReplaceChild(*fragment, *this, aError); } enum nsAdjacentPosition { eBeforeBegin, eAfterBegin, eBeforeEnd, eAfterEnd }; void Element::InsertAdjacentHTML(const nsAString& aPosition, const nsAString& aText, ErrorResult& aError) { nsAdjacentPosition position; if (aPosition.LowerCaseEqualsLiteral("beforebegin")) { position = eBeforeBegin; } else if (aPosition.LowerCaseEqualsLiteral("afterbegin")) { position = eAfterBegin; } else if (aPosition.LowerCaseEqualsLiteral("beforeend")) { position = eBeforeEnd; } else if (aPosition.LowerCaseEqualsLiteral("afterend")) { position = eAfterEnd; } else { aError.Throw(NS_ERROR_DOM_SYNTAX_ERR); return; } nsCOMPtr destination; if (position == eBeforeBegin || position == eAfterEnd) { destination = GetParent(); if (!destination) { aError.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR); return; } } else { destination = this; } nsIDocument* doc = OwnerDoc(); // Needed when insertAdjacentHTML is used in combination with contenteditable mozAutoDocUpdate updateBatch(doc, UPDATE_CONTENT_MODEL, true); nsAutoScriptLoaderDisabler sld(doc); // Batch possible DOMSubtreeModified events. mozAutoSubtreeModified subtree(doc, nullptr); // Parse directly into destination if possible if (doc->IsHTMLDocument() && !OwnerDoc()->MayHaveDOMMutationObservers() && (position == eBeforeEnd || (position == eAfterEnd && !GetNextSibling()) || (position == eAfterBegin && !GetFirstChild()))) { int32_t oldChildCount = destination->GetChildCount(); int32_t contextNs = destination->GetNameSpaceID(); nsIAtom* contextLocal = destination->NodeInfo()->NameAtom(); if (contextLocal == nsGkAtoms::html && contextNs == kNameSpaceID_XHTML) { // For compat with IE6 through IE9. Willful violation of HTML5 as of // 2011-04-06. CreateContextualFragment does the same already. // Spec bug: http://www.w3.org/Bugs/Public/show_bug.cgi?id=12434 contextLocal = nsGkAtoms::body; } aError = nsContentUtils::ParseFragmentHTML(aText, destination, contextLocal, contextNs, doc->GetCompatibilityMode() == eCompatibility_NavQuirks, true); // HTML5 parser has notified, but not fired mutation events. nsContentUtils::FireMutationEventsForDirectParsing(doc, destination, oldChildCount); return; } // couldn't parse directly nsCOMPtr df; aError = nsContentUtils::CreateContextualFragment(destination, aText, true, getter_AddRefs(df)); if (aError.Failed()) { return; } nsCOMPtr fragment = do_QueryInterface(df); // Suppress assertion about node removal mutation events that can't have // listeners anyway, because no one has had the chance to register mutation // listeners on the fragment that comes from the parser. nsAutoScriptBlockerSuppressNodeRemoved scriptBlocker; nsAutoMutationBatch mb(destination, true, false); switch (position) { case eBeforeBegin: destination->InsertBefore(*fragment, this, aError); break; case eAfterBegin: static_cast(this)->InsertBefore(*fragment, GetFirstChild(), aError); break; case eBeforeEnd: static_cast(this)->AppendChild(*fragment, aError); break; case eAfterEnd: destination->InsertBefore(*fragment, GetNextSibling(), aError); break; } } nsINode* Element::InsertAdjacent(const nsAString& aWhere, nsINode* aNode, ErrorResult& aError) { if (aWhere.LowerCaseEqualsLiteral("beforebegin")) { nsCOMPtr parent = GetParentNode(); if (!parent) { return nullptr; } parent->InsertBefore(*aNode, this, aError); } else if (aWhere.LowerCaseEqualsLiteral("afterbegin")) { nsCOMPtr refNode = GetFirstChild(); static_cast(this)->InsertBefore(*aNode, refNode, aError); } else if (aWhere.LowerCaseEqualsLiteral("beforeend")) { static_cast(this)->AppendChild(*aNode, aError); } else if (aWhere.LowerCaseEqualsLiteral("afterend")) { nsCOMPtr parent = GetParentNode(); if (!parent) { return nullptr; } nsCOMPtr refNode = GetNextSibling(); parent->InsertBefore(*aNode, refNode, aError); } else { aError.Throw(NS_ERROR_DOM_SYNTAX_ERR); return nullptr; } return aError.Failed() ? nullptr : aNode; } Element* Element::InsertAdjacentElement(const nsAString& aWhere, Element& aElement, ErrorResult& aError) { nsINode* newNode = InsertAdjacent(aWhere, &aElement, aError); MOZ_ASSERT(!newNode || newNode->IsElement()); return newNode ? newNode->AsElement() : nullptr; } void Element::InsertAdjacentText( const nsAString& aWhere, const nsAString& aData, ErrorResult& aError) { RefPtr textNode = OwnerDoc()->CreateTextNode(aData); InsertAdjacent(aWhere, textNode, aError); } nsIEditor* Element::GetEditorInternal() { nsCOMPtr textCtrl = do_QueryInterface(this); return textCtrl ? textCtrl->GetTextEditor() : nullptr; } nsresult Element::SetBoolAttr(nsIAtom* aAttr, bool aValue) { if (aValue) { return SetAttr(kNameSpaceID_None, aAttr, EmptyString(), true); } return UnsetAttr(kNameSpaceID_None, aAttr, true); } void Element::GetEnumAttr(nsIAtom* aAttr, const char* aDefault, nsAString& aResult) const { GetEnumAttr(aAttr, aDefault, aDefault, aResult); } void Element::GetEnumAttr(nsIAtom* aAttr, const char* aDefaultMissing, const char* aDefaultInvalid, nsAString& aResult) const { const nsAttrValue* attrVal = mAttrsAndChildren.GetAttr(aAttr); aResult.Truncate(); if (!attrVal) { if (aDefaultMissing) { AppendASCIItoUTF16(nsDependentCString(aDefaultMissing), aResult); } else { SetDOMStringToNull(aResult); } } else { if (attrVal->Type() == nsAttrValue::eEnum) { attrVal->GetEnumString(aResult, true); } else if (aDefaultInvalid) { AppendASCIItoUTF16(nsDependentCString(aDefaultInvalid), aResult); } } } void Element::SetOrRemoveNullableStringAttr(nsIAtom* aName, const nsAString& aValue, ErrorResult& aError) { if (DOMStringIsNull(aValue)) { UnsetAttr(aName, aError); } else { SetAttr(aName, aValue, aError); } } Directionality Element::GetComputedDirectionality() const { nsIFrame* frame = GetPrimaryFrame(); if (frame) { return frame->StyleVisibility()->mDirection == NS_STYLE_DIRECTION_LTR ? eDir_LTR : eDir_RTL; } return GetDirectionality(); } float Element::FontSizeInflation() { nsIFrame* frame = GetPrimaryFrame(); if (!frame) { return -1.0; } if (nsLayoutUtils::FontSizeInflationEnabled(frame->PresContext())) { return nsLayoutUtils::FontSizeInflationFor(frame); } return 1.0; } net::ReferrerPolicy Element::GetReferrerPolicyAsEnum() { if (Preferences::GetBool("network.http.enablePerElementReferrer", true) && IsHTMLElement()) { const nsAttrValue* referrerValue = GetParsedAttr(nsGkAtoms::referrerpolicy); if (referrerValue && referrerValue->Type() == nsAttrValue::eEnum) { return net::ReferrerPolicy(referrerValue->GetEnumValue()); } } return net::RP_Unset; } already_AddRefed Element::Dataset() { nsDOMSlots *slots = DOMSlots(); if (!slots->mDataset) { // mDataset is a weak reference so assignment will not AddRef. // AddRef is called before returning the pointer. slots->mDataset = new nsDOMStringMap(this); } RefPtr ret = slots->mDataset; return ret.forget(); } void Element::ClearDataset() { nsDOMSlots *slots = GetExistingDOMSlots(); MOZ_ASSERT(slots && slots->mDataset, "Slots should exist and dataset should not be null."); slots->mDataset = nullptr; } nsDataHashtable, int32_t>* Element::RegisteredIntersectionObservers() { nsExtendedDOMSlots* slots = ExtendedDOMSlots(); return &slots->mRegisteredIntersectionObservers; } enum nsPreviousIntersectionThreshold { eUninitialized = -2, eNonIntersecting = -1 }; void Element::RegisterIntersectionObserver(DOMIntersectionObserver* aObserver) { nsDataHashtable, int32_t>* observers = RegisteredIntersectionObservers(); if (observers->Contains(aObserver)) { return; } // Value can be: // -2: Makes sure next calculated threshold always differs, leading to a // notification task being scheduled. // -1: Non-intersecting. // >= 0: Intersecting, valid index of aObserver->mThresholds. RegisteredIntersectionObservers()->Put(aObserver, eUninitialized); } void Element::UnregisterIntersectionObserver(DOMIntersectionObserver* aObserver) { nsDataHashtable, int32_t>* observers = RegisteredIntersectionObservers(); observers->Remove(aObserver); } bool Element::UpdateIntersectionObservation(DOMIntersectionObserver* aObserver, int32_t aThreshold) { nsDataHashtable, int32_t>* observers = RegisteredIntersectionObservers(); if (!observers->Contains(aObserver)) { return false; } int32_t previousThreshold = observers->Get(aObserver); if (previousThreshold != aThreshold) { observers->Put(aObserver, aThreshold); return true; } return false; } void Element::SetCustomElementData(CustomElementData* aData) { nsExtendedDOMSlots *slots = ExtendedDOMSlots(); MOZ_ASSERT(!slots->mCustomElementData, "Custom element data may not be changed once set."); slots->mCustomElementData = aData; } CustomElementDefinition* Element::GetCustomElementDefinition() const { CustomElementData* data = GetCustomElementData(); if (!data) { return nullptr; } return data->GetCustomElementDefinition(); } void Element::SetCustomElementDefinition(CustomElementDefinition* aDefinition) { CustomElementData* data = GetCustomElementData(); MOZ_ASSERT(data); data->SetCustomElementDefinition(aDefinition); }