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Diffstat (limited to 'dom/base/Element.cpp')
| -rw-r--r-- | dom/base/Element.cpp | 3932 |
1 files changed, 3932 insertions, 0 deletions
diff --git a/dom/base/Element.cpp b/dom/base/Element.cpp new file mode 100644 index 000000000..886acc670 --- /dev/null +++ b/dom/base/Element.cpp @@ -0,0 +1,3932 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +/* + * 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/dom/VRDisplay.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* +nsIContent::DoGetClasses() const +{ + MOZ_ASSERT(HasFlag(NODE_MAY_HAVE_CLASS), "Unexpected call"); + MOZ_ASSERT(IsElement(), "Only elements can have classes"); + + if (IsSVGElement()) { + const nsAttrValue* animClass = + static_cast<const nsSVGElement*>(this)->GetAnimatedClassName(); + if (animClass) { + return animClass; + } + } + + return AsElement()->GetParsedAttr(nsGkAtoms::_class); +} + +NS_IMETHODIMP +Element::QueryInterface(REFNSIID aIID, void** aInstancePtr) +{ + 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<nsIContent> 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<nsIDOMElement> 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<EventStates*>(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<EventStates>); + 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<EventStates>); + } + + 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<nsIPresShell> shell = aDocument->GetShell(); + if (!shell || GetPrimaryFrame() || !isXULorPluginElement) { + *aResult = nullptr; + + return true; + } + + // Get the computed -moz-binding directly from the style context + RefPtr<nsStyleContext> sc = + nsComputedDOMStyle::GetStyleContextForElementNoFlush(this, nullptr, shell); + NS_ENSURE_TRUE(sc, false); + + *aResult = sc->StyleDisplay()->mBinding; + + return true; +} + +JSObject* +Element::WrapObject(JSContext *aCx, JS::Handle<JSObject*> aGivenProto) +{ + JS::Rooted<JSObject*> givenProto(aCx, aGivenProto); + JS::Rooted<JSObject*> customProto(aCx); + + if (!givenProto) { + // Custom element prototype swizzling. + CustomElementData* data = GetCustomElementData(); + if (data) { + // If this is a registered custom element then fix the prototype. + nsContentUtils::GetCustomPrototype(OwnerDoc(), NodeInfo()->NamespaceID(), + data->mType, &customProto); + if (customProto && + NodePrincipal()->SubsumesConsideringDomain(nsContentUtils::ObjectPrincipal(customProto))) { + // Just go ahead and create with the right proto up front. Set + // customProto to null to flag that we don't need to do any post-facto + // proto fixups here. + givenProto = customProto; + customProto = nullptr; + } + } + } + + JS::Rooted<JSObject*> obj(aCx, nsINode::WrapObject(aCx, givenProto)); + if (!obj) { + return nullptr; + } + + if (customProto) { + // We want to set the custom prototype in the compartment where it was + // registered. In the case that |obj| and |prototype| are in different + // compartments, this will set the prototype on the |obj|'s wrapper and + // thus only visible in the wrapper's compartment, since we know obj's + // principal does not subsume customProto's in this case. + JSAutoCompartment ac(aCx, customProto); + JS::Rooted<JSObject*> wrappedObj(aCx, obj); + if (!JS_WrapObject(aCx, &wrappedObj) || + !JS_SetPrototype(aCx, wrappedObj, customProto)) { + 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<nsIURI> uri = bindingURL->GetURI(); + nsCOMPtr<nsIPrincipal> 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<nsXBLBinding> 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<nsString>& 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<nsIHTMLCollection> +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() +{ + ScrollIntoView(ScrollIntoViewOptions()); +} + +void +Element::ScrollIntoView(bool aTop) +{ + ScrollIntoViewOptions options; + if (!aTop) { + options.mBlock = ScrollLogicalPosition::End; + } + ScrollIntoView(options); +} + +void +Element::ScrollIntoView(const ScrollIntoViewOptions &aOptions) +{ + nsIDocument *document = GetComposedDoc(); + if (!document) { + return; + } + + // Get the presentation shell + nsCOMPtr<nsIPresShell> presShell = document->GetShell(); + if (!presShell) { + return; + } + + int16_t vpercent = (aOptions.mBlock == ScrollLogicalPosition::Start) + ? nsIPresShell::SCROLL_TOP + : nsIPresShell::SCROLL_BOTTOM; + + 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(), + 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<DOMRect> +Element::GetBoundingClientRect() +{ + RefPtr<DOMRect> 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<DOMRectList> +Element::GetClientRects() +{ + RefPtr<DOMRectList> 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); + } + } +} + +already_AddRefed<ShadowRoot> +Element::CreateShadowRoot(ErrorResult& aError) +{ + nsAutoScriptBlocker scriptBlocker; + + RefPtr<mozilla::dom::NodeInfo> nodeInfo; + nodeInfo = mNodeInfo->NodeInfoManager()->GetNodeInfo( + nsGkAtoms::documentFragmentNodeName, nullptr, kNameSpaceID_None, + nsIDOMNode::DOCUMENT_FRAGMENT_NODE); + + RefPtr<nsXBLDocumentInfo> 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; + } + + nsIDocument* doc = GetComposedDoc(); + nsIContent* destroyedFramesFor = nullptr; + if (doc) { + nsIPresShell* shell = doc->GetShell(); + if (shell) { + shell->DestroyFramesFor(this, &destroyedFramesFor); + 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); + + RefPtr<ShadowRoot> shadowRoot = new ShadowRoot(this, nodeInfo.forget(), + protoBinding); + + shadowRoot->SetIsComposedDocParticipant(IsInComposedDoc()); + + // Replace the old ShadowRoot with the new one and let the old + // ShadowRoot know about the younger ShadowRoot because the old + // ShadowRoot is projected into the younger ShadowRoot's shadow + // insertion point (if it exists). + ShadowRoot* olderShadow = GetShadowRoot(); + SetShadowRoot(shadowRoot); + if (olderShadow) { + olderShadow->SetYoungerShadow(shadowRoot); + + // Unbind children of older shadow root because they + // are no longer in the composed tree. + for (nsIContent* child = olderShadow->GetFirstChild(); child; + child = child->GetNextSibling()) { + child->UnbindFromTree(true, false); + } + + olderShadow->SetIsComposedDocParticipant(false); + } + + // xblBinding takes ownership of docInfo. + RefPtr<nsXBLBinding> xblBinding = new nsXBLBinding(shadowRoot, protoBinding); + shadowRoot->SetAssociatedBinding(xblBinding); + xblBinding->SetBoundElement(this); + + SetXBLBinding(xblBinding); + + // Recreate the frame for the bound content because binding a ShadowRoot + // changes how things are rendered. + if (doc) { + MOZ_ASSERT(doc == GetComposedDoc()); + nsIPresShell* shell = doc->GetShell(); + if (shell) { + shell->CreateFramesFor(destroyedFramesFor); + } + } + + return shadowRoot.forget(); +} + +NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(DestinationInsertionPointList, mParent, + mDestinationPoints) + +NS_INTERFACE_TABLE_HEAD(DestinationInsertionPointList) + NS_WRAPPERCACHE_INTERFACE_TABLE_ENTRY + NS_INTERFACE_TABLE(DestinationInsertionPointList, nsINodeList, nsIDOMNodeList) + NS_INTERFACE_TABLE_TO_MAP_SEGUE_CYCLE_COLLECTION(DestinationInsertionPointList) +NS_INTERFACE_MAP_END + +NS_IMPL_CYCLE_COLLECTING_ADDREF(DestinationInsertionPointList) +NS_IMPL_CYCLE_COLLECTING_RELEASE(DestinationInsertionPointList) + +DestinationInsertionPointList::DestinationInsertionPointList(Element* aElement) + : mParent(aElement) +{ + nsTArray<nsIContent*>* destPoints = aElement->GetExistingDestInsertionPoints(); + if (destPoints) { + for (uint32_t i = 0; i < destPoints->Length(); i++) { + mDestinationPoints.AppendElement(destPoints->ElementAt(i)); + } + } +} + +DestinationInsertionPointList::~DestinationInsertionPointList() +{ +} + +nsIContent* +DestinationInsertionPointList::Item(uint32_t aIndex) +{ + return mDestinationPoints.SafeElementAt(aIndex); +} + +NS_IMETHODIMP +DestinationInsertionPointList::Item(uint32_t aIndex, nsIDOMNode** aReturn) +{ + nsIContent* item = Item(aIndex); + if (!item) { + return NS_ERROR_FAILURE; + } + + return CallQueryInterface(item, aReturn); +} + +uint32_t +DestinationInsertionPointList::Length() const +{ + return mDestinationPoints.Length(); +} + +NS_IMETHODIMP +DestinationInsertionPointList::GetLength(uint32_t* aLength) +{ + *aLength = Length(); + return NS_OK; +} + +int32_t +DestinationInsertionPointList::IndexOf(nsIContent* aContent) +{ + return mDestinationPoints.IndexOf(aContent); +} + +JSObject* +DestinationInsertionPointList::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) +{ + return NodeListBinding::Wrap(aCx, this, aGivenProto); +} + +already_AddRefed<DestinationInsertionPointList> +Element::GetDestinationInsertionPoints() +{ + RefPtr<DestinationInsertionPointList> list = + new DestinationInsertionPointList(this); + return list.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(); + } + } +} + +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<nsIAtom> nameAtom = NS_Atomize(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<Attr> +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<Attr> +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<nsIAtom> name = NS_Atomize(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<mozilla::dom::NodeInfo> 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<nsIAtom> name = NS_Atomize(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<Attr> +Element::SetAttributeNodeNS(Attr& aNewAttr, + ErrorResult& aError) +{ + OwnerDoc()->WarnOnceAbout(nsIDocument::eSetAttributeNodeNS); + return Attributes()->SetNamedItemNS(aNewAttr, aError); +} + +already_AddRefed<nsIHTMLCollection> +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<nsIHTMLCollection> 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<nsIAtom> name = NS_Atomize(aLocalName); + return HasAttr(nsid, name); +} + +already_AddRefed<nsIHTMLCollection> +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) { + nsDOMSlots *slots = DOMSlots(); + + 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) { + DOMSlots()->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()); + } + + nsIDocument* composedDoc = GetComposedDoc(); + if (composedDoc) { + // Attached callback must be enqueued whenever custom element is inserted into a + // document and this document has a browsing context. + if (GetCustomElementData() && composedDoc->GetDocShell()) { + // Enqueue an attached callback for the custom element. + nsContentUtils::EnqueueLifecycleCallback( + composedDoc, nsIDocument::eAttached, 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<nsIContent> anonRoot = contBinding->GetAnonymousContent(); + bool allowScripts = contBinding->AllowScripts(); + for (nsCOMPtr<nsIContent> 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<nsStyledElement*>(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<nsINode> p; + p.swap(mParent); + } else { + mParent = nullptr; + } + SetParentIsContent(false); + } + + // 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); + + // Detached must be enqueued whenever custom element is removed from + // the document and this document has a browsing context. + if (GetCustomElementData() && document->GetDocShell()) { + // Enqueue a detached callback for the custom element. + nsContentUtils::EnqueueLifecycleCallback( + document, nsIDocument::eDetached, 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 + + nsDOMSlots* slots = GetExistingDOMSlots(); + 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::nsDOMSlots *slots = DOMSlots(); + + if (!slots->mSMILOverrideStyle) { + slots->mSMILOverrideStyle = new nsDOMCSSAttributeDeclaration(this, true); + } + + return slots->mSMILOverrideStyle; +} + +DeclarationBlock* +Element::GetSMILOverrideStyleDeclaration() +{ + Element::nsDOMSlots *slots = GetExistingDOMSlots(); + return slots ? slots->mSMILOverrideStyleDeclaration.get() : nullptr; +} + +nsresult +Element::SetSMILOverrideStyleDeclaration(DeclarationBlock* aDeclaration, + bool aNotify) +{ + Element::nsDOMSlots *slots = DOMSlots(); + + 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<nsIPresShell> 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<mozilla::dom::NodeInfo> +Element::GetExistingAttrNameFromQName(const nsAString& aStr) const +{ + const nsAttrName* name = InternalGetAttrNameFromQName(aStr); + if (!name) { + return nullptr; + } + + RefPtr<mozilla::dom::NodeInfo> 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<nsPIDOMWindowOuter> window = document->GetWindow(); + if (!window) + return false; + + nsCOMPtr<nsPIDOMWindowOuter> 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<nsIPresShell> 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 modification = false; + *aHasListeners = aNotify && + nsContentUtils::HasMutationListeners(this, + NS_EVENT_BITS_MUTATION_ATTRMODIFIED, + this); + + // 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); + } + bool valueMatches = aValue.EqualsAsStrings(*info.mValue); + if (valueMatches && aPrefix == info.mName->GetPrefix()) { + return true; + } + modification = true; + } + } + *aModType = modification ? + static_cast<uint8_t>(nsIDOMMutationEvent::MODIFICATION) : + static_cast<uint8_t>(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) +{ + if (!MaybeCheckSameAttrVal(aNamespaceID, aName, aPrefix, aValue, aNotify, + aOldValue, aModType, aHasListeners)) { + return false; + } + + nsAutoScriptBlocker scriptBlocker; + nsNodeUtils::AttributeSetToCurrentValue(this, aNamespaceID, aName); + return true; +} + +nsresult +Element::SetAttr(int32_t aNamespaceID, nsIAtom* aName, + nsIAtom* aPrefix, const nsAString& aValue, + bool aNotify) +{ + // Keep this in sync with SetParsedAttr below + + 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(aValue); + nsAttrValue oldValue; + + if (OnlyNotifySameValueSet(aNamespaceID, aName, aPrefix, value, aNotify, + oldValue, &modType, &hasListeners)) { + return NS_OK; + } + + nsresult rv = BeforeSetAttr(aNamespaceID, aName, &value, aNotify); + NS_ENSURE_SUCCESS(rv, rv); + nsAttrValue* preparsedAttrValue = value.GetStoredAttrValue(); + + if (aNotify) { + nsNodeUtils::AttributeWillChange(this, aNamespaceID, aName, modType, + preparsedAttrValue); + } + + // Hold a script blocker while calling ParseAttribute since that can call + // out to id-observers + nsAutoScriptBlocker scriptBlocker; + + nsAttrValue attrValue; + if (preparsedAttrValue) { + attrValue.SwapValueWith(*preparsedAttrValue); + } + // Even the value was pre-parsed in BeforeSetAttr, we still need to call + // ParseAttribute because it can have side effects. + if (!ParseAttribute(aNamespaceID, aName, aValue, attrValue)) { + attrValue.SetTo(aValue); + } + + return SetAttrAndNotify(aNamespaceID, aName, aPrefix, oldValue, + attrValue, modType, hasListeners, aNotify, + kCallAfterSetAttr); +} + +nsresult +Element::SetParsedAttr(int32_t aNamespaceID, nsIAtom* aName, + nsIAtom* aPrefix, nsAttrValue& aParsedValue, + bool aNotify) +{ + // Keep this in sync with SetAttr 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; + + if (OnlyNotifySameValueSet(aNamespaceID, aName, aPrefix, value, aNotify, + oldValue, &modType, &hasListeners)) { + return NS_OK; + } + + nsresult rv = BeforeSetAttr(aNamespaceID, aName, &value, aNotify); + NS_ENSURE_SUCCESS(rv, rv); + + if (aNotify) { + nsNodeUtils::AttributeWillChange(this, aNamespaceID, aName, modType, + &aParsedValue); + } + + return SetAttrAndNotify(aNamespaceID, aName, aPrefix, oldValue, + aParsedValue, modType, hasListeners, aNotify, + kCallAfterSetAttr); +} + +nsresult +Element::SetAttrAndNotify(int32_t aNamespaceID, + nsIAtom* aName, + nsIAtom* aPrefix, + const nsAttrValue& aOldValue, + nsAttrValue& aParsedValue, + uint8_t aModType, + bool aFireMutation, + bool aNotify, + bool aCallAfterSetAttr) +{ + nsresult rv; + + nsIDocument* document = GetComposedDoc(); + mozAutoDocUpdate updateBatch(document, UPDATE_CONTENT_MODEL, aNotify); + + 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; + + 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) || + !SetMappedAttribute(document, aName, aParsedValue, &rv)) { + rv = mAttrsAndChildren.SetAndSwapAttr(aName, aParsedValue); + } + } + else { + RefPtr<mozilla::dom::NodeInfo> ni; + ni = mNodeInfo->NodeInfoManager()->GetNodeInfo(aName, aPrefix, + aNamespaceID, + nsIDOMNode::ATTRIBUTE_NODE); + + rv = mAttrsAndChildren.SetAndSwapAttr(ni, aParsedValue); + } + + // If the old value owns its own data, we know it is OK to keep using it. + const nsAttrValue* oldValue = + aParsedValue.StoresOwnData() ? &aParsedValue : &aOldValue; + + NS_ENSURE_SUCCESS(rv, rv); + + if (document || HasFlag(NODE_FORCE_XBL_BINDINGS)) { + RefPtr<nsXBLBinding> binding = GetXBLBinding(); + if (binding) { + binding->AttributeChanged(aName, aNamespaceID, false, aNotify); + } + } + + UpdateState(aNotify); + + nsIDocument* ownerDoc = OwnerDoc(); + if (ownerDoc && GetCustomElementData()) { + nsCOMPtr<nsIAtom> oldValueAtom = oldValue->GetAsAtom(); + nsCOMPtr<nsIAtom> newValueAtom = valueForAfterSetAttr.GetAsAtom(); + LifecycleCallbackArgs args = { + nsDependentAtomString(aName), + aModType == nsIDOMMutationEvent::ADDITION ? + NullString() : nsDependentAtomString(oldValueAtom), + nsDependentAtomString(newValueAtom) + }; + + nsContentUtils::EnqueueLifecycleCallback( + ownerDoc, nsIDocument::eAttributeChanged, this, &args); + } + + if (aCallAfterSetAttr) { + rv = AfterSetAttr(aNamespaceID, aName, &valueForAfterSetAttr, aNotify); + NS_ENSURE_SUCCESS(rv, rv); + + if (aNamespaceID == kNameSpaceID_None && aName == nsGkAtoms::dir) { + OnSetDirAttr(this, &valueForAfterSetAttr, + hadValidDir, hadDirAuto, 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, + oldValue == &aParsedValue ? &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->IsEmptyString()) { + mutation.mPrevAttrValue = oldValue->GetAsAtom(); + } + mutation.mAttrChange = aModType; + + mozAutoSubtreeModified subtree(OwnerDoc(), this); + (new AsyncEventDispatcher(this, mutation))->RunDOMEventWhenSafe(); + } + + return NS_OK; +} + +nsresult +Element::BeforeSetAttr(int32_t aNamespaceID, nsIAtom* aName, + nsAttrValueOrString* aValue, bool aNotify) +{ + if (aNamespaceID == kNameSpaceID_None) { + if (aName == nsGkAtoms::_class) { + // aValue->GetAttrValue will only be non-null here when this is called + // via Element::SetParsedAttr. This shouldn't happen for "class", but + // this will handle it. + if (aValue && !aValue->GetAttrValue()) { + nsAttrValue attr; + attr.ParseAtomArray(aValue->String()); + aValue->TakeParsedValue(attr); + } + } + } + return NS_OK; +} + +bool +Element::ParseAttribute(int32_t aNamespaceID, + nsIAtom* aAttribute, + const nsAString& aValue, + nsAttrValue& aResult) +{ + if (aNamespaceID == kNameSpaceID_None) { + if (aAttribute == nsGkAtoms::_class) { + SetFlags(NODE_MAY_HAVE_CLASS); + // Result should have been preparsed above. + return true; + } + 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. + RemoveFromIdTable(); + if (aValue.IsEmpty()) { + ClearHasID(); + return false; + } + aResult.ParseAtom(aValue); + SetHasID(); + AddToIdTable(aResult.GetAtomValue()); + return true; + } + } + + return false; +} + +bool +Element::SetMappedAttribute(nsIDocument* aDocument, + nsIAtom* aName, + nsAttrValue& aValue, + nsresult* aRetval) +{ + *aRetval = NS_OK; + return false; +} + +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; + } + + nsresult rv = BeforeSetAttr(aNameSpaceID, aName, nullptr, aNotify); + NS_ENSURE_SUCCESS(rv, rv); + + nsIDocument *document = GetComposedDoc(); + mozAutoDocUpdate updateBatch(document, UPDATE_CONTENT_MODEL, aNotify); + + if (aNotify) { + nsNodeUtils::AttributeWillChange(this, aNameSpaceID, aName, + nsIDOMMutationEvent::REMOVAL, + nullptr); + } + + bool hasMutationListeners = aNotify && + nsContentUtils::HasMutationListeners(this, + NS_EVENT_BITS_MUTATION_ATTRMODIFIED, + this); + + // Grab the attr node if needed before we remove it from the attr map + RefPtr<Attr> 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(); + + if (aName == nsGkAtoms::id && aNameSpaceID == kNameSpaceID_None) { + // Have to do this before clearing flag. See RemoveFromIdTable + RemoveFromIdTable(); + ClearHasID(); + } + + 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); + + if (document || HasFlag(NODE_FORCE_XBL_BINDINGS)) { + RefPtr<nsXBLBinding> binding = GetXBLBinding(); + if (binding) { + binding->AttributeChanged(aName, aNameSpaceID, true, aNotify); + } + } + + UpdateState(aNotify); + + nsIDocument* ownerDoc = OwnerDoc(); + if (ownerDoc && GetCustomElementData()) { + nsCOMPtr<nsIAtom> oldValueAtom = oldValue.GetAsAtom(); + LifecycleCallbackArgs args = { + nsDependentAtomString(aName), + nsDependentAtomString(oldValueAtom), + NullString() + }; + + nsContentUtils::EnqueueLifecycleCallback( + ownerDoc, nsIDocument::eAttributeChanged, this, &args); + } + + 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); + } + + rv = AfterSetAttr(aNameSpaceID, aName, nullptr, aNotify); + NS_ENSURE_SUCCESS(rv, rv); + + 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<unsigned long long>(State().GetInternalValue())); + fprintf(out, " flags=[%08x]", static_cast<unsigned int>(GetFlags())); + if (IsCommonAncestorForRangeInSelection()) { + nsRange::RangeHashTable* ranges = + static_cast<nsRange::RangeHashTable*>(GetProperty(nsGkAtoms::range)); + fprintf(out, " ranges:%d", ranges ? ranges->Count() : 0); + } + fprintf(out, " primaryframe=%p", static_cast<void*>(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<Element*>(this); + + // XXX sXBL/XBL2 issue! Owner or current document? + nsIDocument *document = OwnerDoc(); + + // Note: not listing nsIAnonymousContentCreator-created content... + + nsBindingManager* bindingManager = document->BindingManager(); + nsCOMPtr<nsIDOMNodeList> 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<nsIDOMNode> node; + anonymousChildren->Item(i, getter_AddRefs(node)); + nsCOMPtr<nsIContent> 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); + fputs(NS_LossyConvertUTF16toASCII(buf).get(), 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::PreHandleEventForLinks(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<nsIURI> absURI; + if (!CheckHandleEventForLinksPrecondition(aVisitor, getter_AddRefs(absURI))) { + return NS_OK; + } + + nsresult rv = NS_OK; + + // We do the status bar updates in PreHandleEvent 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<nsIURI> 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<nsIDOMElement> 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<nsIPresShell> 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<nsDOMTokenList*>(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<nsDOMTokenList*>(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<bool> 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<FullscreenRequest>(this); + request->mIsCallerChrome = nsContentUtils::IsCallerChrome(); + + OwnerDoc()->AsyncRequestFullScreen(Move(request)); +} + +void +Element::RequestPointerLock() +{ + OwnerDoc()->RequestPointerLock(this); +} + +void +Element::GetGridFragments(nsTArray<RefPtr<Grid>>& 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<nsGridContainerFrame*>(frame->GetNextInFlow()); + } +} + +already_AddRefed<Animation> +Element::Animate(JSContext* aContext, + JS::Handle<JSObject*> aKeyframes, + const UnrestrictedDoubleOrKeyframeAnimationOptions& aOptions, + ErrorResult& aError) +{ + Nullable<ElementOrCSSPseudoElement> target; + target.SetValue().SetAsElement() = this; + return Animate(target, aContext, aKeyframes, aOptions, aError); +} + +/* static */ already_AddRefed<Animation> +Element::Animate(const Nullable<ElementOrCSSPseudoElement>& aTarget, + JSContext* aContext, + JS::Handle<JSObject*> aKeyframes, + const UnrestrictedDoubleOrKeyframeAnimationOptions& aOptions, + ErrorResult& aError) +{ + MOZ_ASSERT(!aTarget.IsNull() && + (aTarget.Value().IsElement() || + aTarget.Value().IsCSSPseudoElement()), + "aTarget should be initialized"); + + RefPtr<Element> referenceElement; + if (aTarget.Value().IsElement()) { + referenceElement = &aTarget.Value().GetAsElement(); + } else { + referenceElement = aTarget.Value().GetAsCSSPseudoElement().ParentElement(); + } + + nsCOMPtr<nsIGlobalObject> 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<JSObject*> keyframes(aContext); + keyframes = aKeyframes; + Maybe<JSAutoCompartment> ac; + if (js::GetContextCompartment(aContext) != + js::GetObjectCompartment(ownerGlobal->GetGlobalJSObject())) { + ac.emplace(aContext, ownerGlobal->GetGlobalJSObject()); + if (!JS_WrapObject(aContext, &keyframes)) { + return nullptr; + } + } + + RefPtr<KeyframeEffect> effect = + KeyframeEffect::Constructor(global, aTarget, keyframes, aOptions, aError); + if (aError.Failed()) { + return nullptr; + } + + AnimationTimeline* timeline = referenceElement->OwnerDoc()->Timeline(); + RefPtr<Animation> animation = + Animation::Constructor(global, effect, + Optional<AnimationTimeline*>(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<RefPtr<Animation>>& 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<RefPtr<Animation>>()); +} + +/* static */ void +Element::GetAnimationsUnsorted(Element* aElement, + CSSPseudoElementType aPseudoType, + nsTArray<RefPtr<Animation>>& 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<nsINode> 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<DocumentFragment> fragment = + new DocumentFragment(OwnerDoc()->NodeInfoManager()); + nsContentUtils::ParseFragmentHTML(aOuterHTML, + fragment, + localName, + namespaceID, + OwnerDoc()->GetCompatibilityMode() == + eCompatibility_NavQuirks, + true); + parent->ReplaceChild(*fragment, *this, aError); + return; + } + + nsCOMPtr<nsINode> 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<mozilla::dom::NodeInfo> info = + OwnerDoc()->NodeInfoManager()->GetNodeInfo(nsGkAtoms::body, + nullptr, + kNameSpaceID_XHTML, + nsIDOMNode::ELEMENT_NODE); + context = NS_NewHTMLBodyElement(info.forget(), FROM_PARSER_FRAGMENT); + } + + nsCOMPtr<nsIDOMDocumentFragment> df; + aError = nsContentUtils::CreateContextualFragment(context, + aOuterHTML, + true, + getter_AddRefs(df)); + if (aError.Failed()) { + return; + } + nsCOMPtr<nsINode> 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<nsIContent> 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<nsIDOMDocumentFragment> df; + aError = nsContentUtils::CreateContextualFragment(destination, + aText, + true, + getter_AddRefs(df)); + if (aError.Failed()) { + return; + } + + nsCOMPtr<nsINode> 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<nsINode*>(this)->InsertBefore(*fragment, GetFirstChild(), + aError); + break; + case eBeforeEnd: + static_cast<nsINode*>(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<nsINode> parent = GetParentNode(); + if (!parent) { + return nullptr; + } + parent->InsertBefore(*aNode, this, aError); + } else if (aWhere.LowerCaseEqualsLiteral("afterbegin")) { + nsCOMPtr<nsINode> refNode = GetFirstChild(); + static_cast<nsINode*>(this)->InsertBefore(*aNode, refNode, aError); + } else if (aWhere.LowerCaseEqualsLiteral("beforeend")) { + static_cast<nsINode*>(this)->AppendChild(*aNode, aError); + } else if (aWhere.LowerCaseEqualsLiteral("afterend")) { + nsCOMPtr<nsINode> parent = GetParentNode(); + if (!parent) { + return nullptr; + } + nsCOMPtr<nsINode> 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<nsTextNode> textNode = OwnerDoc()->CreateTextNode(aData); + InsertAdjacent(aWhere, textNode, aError); +} + +nsIEditor* +Element::GetEditorInternal() +{ + nsCOMPtr<nsITextControlElement> 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<nsDOMStringMap> +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<nsDOMStringMap> 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; +} + +nsTArray<Element::nsDOMSlots::IntersectionObserverRegistration>* +Element::RegisteredIntersectionObservers() +{ + nsDOMSlots* slots = DOMSlots(); + return &slots->mRegisteredIntersectionObservers; +} + +void +Element::RegisterIntersectionObserver(DOMIntersectionObserver* aObserver) +{ + RegisteredIntersectionObservers()->AppendElement( + nsDOMSlots::IntersectionObserverRegistration { aObserver, -1 }); +} + +void +Element::UnregisterIntersectionObserver(DOMIntersectionObserver* aObserver) +{ + nsTArray<nsDOMSlots::IntersectionObserverRegistration>* observers = + RegisteredIntersectionObservers(); + for (uint32_t i = 0; i < observers->Length(); ++i) { + nsDOMSlots::IntersectionObserverRegistration reg = observers->ElementAt(i); + if (reg.observer == aObserver) { + observers->RemoveElementAt(i); + break; + } + } +} + +bool +Element::UpdateIntersectionObservation(DOMIntersectionObserver* aObserver, int32_t aThreshold) +{ + nsTArray<nsDOMSlots::IntersectionObserverRegistration>* observers = + RegisteredIntersectionObservers(); + for (auto& reg : *observers) { + if (reg.observer == aObserver && reg.previousThreshold != aThreshold) { + reg.previousThreshold = aThreshold; + return true; + } + } + return false; +} |