зеркало из https://github.com/mozilla/gecko-dev.git
4710 строки
143 KiB
C++
4710 строки
143 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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* Base class for all element classes; this provides an implementation
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* of DOM Core's Element, implements nsIContent, provides
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* utility methods for subclasses, and so forth.
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*/
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#include "mozilla/dom/ElementInlines.h"
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#include "AnimationCommon.h"
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#include "mozilla/DebugOnly.h"
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#include "mozilla/StaticPrefs.h"
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#include "mozilla/dom/Animation.h"
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#include "mozilla/dom/Attr.h"
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#include "mozilla/dom/Flex.h"
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#include "mozilla/dom/Grid.h"
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#include "mozilla/gfx/Matrix.h"
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#include "nsAtom.h"
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#include "nsCSSFrameConstructor.h"
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#include "nsDOMAttributeMap.h"
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#include "nsIContentInlines.h"
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#include "mozilla/dom/NodeInfo.h"
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#include "nsIDocumentInlines.h"
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#include "mozilla/dom/DocumentTimeline.h"
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#include "nsIContentIterator.h"
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#include "nsFlexContainerFrame.h"
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#include "nsFocusManager.h"
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#include "nsILinkHandler.h"
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#include "nsIScriptGlobalObject.h"
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#include "nsIURL.h"
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#include "nsContainerFrame.h"
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#include "nsIAnonymousContentCreator.h"
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#include "nsIPresShell.h"
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#include "nsPresContext.h"
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#include "nsStyleConsts.h"
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#include "nsString.h"
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#include "nsUnicharUtils.h"
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#include "nsDOMCID.h"
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#include "nsIServiceManager.h"
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#include "nsDOMCSSAttrDeclaration.h"
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#include "nsNameSpaceManager.h"
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#include "nsContentList.h"
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#include "nsVariant.h"
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#include "nsDOMTokenList.h"
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#include "nsXBLPrototypeBinding.h"
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#include "nsError.h"
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#include "nsDOMString.h"
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#include "nsIScriptSecurityManager.h"
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#include "mozilla/dom/AnimatableBinding.h"
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#include "mozilla/dom/FeaturePolicyUtils.h"
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#include "mozilla/dom/HTMLDivElement.h"
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#include "mozilla/dom/HTMLSpanElement.h"
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#include "mozilla/dom/KeyframeAnimationOptionsBinding.h"
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#include "mozilla/dom/MutationEventBinding.h"
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#include "mozilla/AnimationComparator.h"
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#include "mozilla/AsyncEventDispatcher.h"
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#include "mozilla/ContentEvents.h"
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#include "mozilla/DeclarationBlock.h"
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#include "mozilla/EffectSet.h"
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#include "mozilla/EventDispatcher.h"
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#include "mozilla/EventListenerManager.h"
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#include "mozilla/EventStateManager.h"
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#include "mozilla/EventStates.h"
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#include "mozilla/FullscreenChange.h"
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#include "mozilla/InternalMutationEvent.h"
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#include "mozilla/MouseEvents.h"
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#include "mozilla/RestyleManager.h"
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#include "mozilla/SizeOfState.h"
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#include "mozilla/TextEditor.h"
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#include "mozilla/TextEvents.h"
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#include "nsNodeUtils.h"
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#include "mozilla/dom/DirectionalityUtils.h"
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#include "nsDocument.h"
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#include "nsAttrValueOrString.h"
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#include "nsAttrValueInlines.h"
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#include "nsCSSPseudoElements.h"
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#include "nsWindowSizes.h"
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#ifdef MOZ_XUL
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#include "nsXULElement.h"
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#endif /* MOZ_XUL */
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#include "nsSVGElement.h"
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#include "nsFrameSelection.h"
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#ifdef DEBUG
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#include "nsRange.h"
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#endif
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#include "nsBindingManager.h"
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#include "nsXBLBinding.h"
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#include "nsPIDOMWindow.h"
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#include "nsPIBoxObject.h"
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#include "mozilla/dom/DOMRect.h"
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#include "nsSVGUtils.h"
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#include "nsLayoutUtils.h"
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#include "nsGkAtoms.h"
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#include "nsContentUtils.h"
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#include "ChildIterator.h"
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#include "nsIDOMEventListener.h"
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#include "nsIWebNavigation.h"
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#include "nsIBaseWindow.h"
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#include "nsIWidget.h"
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#include "nsNodeInfoManager.h"
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#include "nsICategoryManager.h"
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#include "nsGenericHTMLElement.h"
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#include "nsContentCreatorFunctions.h"
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#include "nsIControllers.h"
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#include "nsView.h"
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#include "nsViewManager.h"
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#include "nsIScrollableFrame.h"
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#include "nsTextNode.h"
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#include "nsCycleCollectionParticipant.h"
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#include "nsCCUncollectableMarker.h"
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#include "mozAutoDocUpdate.h"
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#include "nsDOMMutationObserver.h"
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#include "nsWrapperCacheInlines.h"
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#include "xpcpublic.h"
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#include "nsIScriptError.h"
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#include "mozilla/Telemetry.h"
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#include "mozilla/CORSMode.h"
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#include "mozilla/dom/ShadowRoot.h"
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#include "mozilla/dom/NodeListBinding.h"
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#include "nsStyledElement.h"
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#include "nsXBLService.h"
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#include "nsITextControlElement.h"
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#include "nsITextControlFrame.h"
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#include "nsISupportsImpl.h"
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#include "mozilla/dom/CSSPseudoElement.h"
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#include "mozilla/dom/DocumentFragment.h"
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#include "mozilla/dom/ElementBinding.h"
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#include "mozilla/dom/KeyframeEffectBinding.h"
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#include "mozilla/dom/KeyframeEffect.h"
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#include "mozilla/dom/MouseEventBinding.h"
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#include "mozilla/dom/WindowBinding.h"
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#include "mozilla/dom/VRDisplay.h"
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#include "mozilla/IntegerPrintfMacros.h"
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#include "mozilla/Preferences.h"
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#include "nsComputedDOMStyle.h"
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#include "nsDOMStringMap.h"
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#include "DOMIntersectionObserver.h"
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#include "nsISpeculativeConnect.h"
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#include "nsIIOService.h"
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#include "DOMMatrix.h"
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using namespace mozilla;
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using namespace mozilla::dom;
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using mozilla::gfx::Matrix4x4;
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//
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// Verify sizes of elements on 64-bit platforms. This should catch most memory
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// regressions, and is easy to verify locally since most developers are on
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// 64-bit machines. We use a template rather than a direct static assert so
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// that the error message actually displays the sizes.
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//
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// We need different numbers on certain build types to deal with the owning
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// thread pointer that comes with the non-threadsafe refcount on
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// FragmentOrElement.
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#ifdef MOZ_THREAD_SAFETY_OWNERSHIP_CHECKS_SUPPORTED
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#define EXTRA_DOM_ELEMENT_BYTES 8
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#else
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#define EXTRA_DOM_ELEMENT_BYTES 0
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#endif
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#define ASSERT_ELEMENT_SIZE(type, opt_size) \
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template<int a, int b> struct Check##type##Size \
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{ \
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static_assert(sizeof(void*) != 8 || a == b, "DOM size changed"); \
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}; \
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Check##type##Size<sizeof(type), opt_size + EXTRA_DOM_ELEMENT_BYTES> g##type##CES;
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// Note that mozjemalloc uses a 16 byte quantum, so 128 is a bin/bucket size.
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ASSERT_ELEMENT_SIZE(Element, 128);
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ASSERT_ELEMENT_SIZE(HTMLDivElement, 128);
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ASSERT_ELEMENT_SIZE(HTMLSpanElement, 128);
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#undef ASSERT_ELEMENT_SIZE
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#undef EXTRA_DOM_ELEMENT_BYTES
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nsAtom*
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nsIContent::DoGetID() const
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{
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MOZ_ASSERT(HasID(), "Unexpected call");
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MOZ_ASSERT(IsElement(), "Only elements can have IDs");
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return AsElement()->GetParsedAttr(nsGkAtoms::id)->GetAtomValue();
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}
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const nsAttrValue*
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Element::GetSVGAnimatedClass() const
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{
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MOZ_ASSERT(MayHaveClass() && IsSVGElement(), "Unexpected call");
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return static_cast<const nsSVGElement*>(this)->GetAnimatedClassName();
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}
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NS_IMETHODIMP
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Element::QueryInterface(REFNSIID aIID, void** aInstancePtr)
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{
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if (aIID.Equals(NS_GET_IID(Element))) {
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NS_ADDREF_THIS();
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*aInstancePtr = this;
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return NS_OK;
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}
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NS_ASSERTION(aInstancePtr,
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"QueryInterface requires a non-NULL destination!");
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nsresult rv = FragmentOrElement::QueryInterface(aIID, aInstancePtr);
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if (NS_SUCCEEDED(rv)) {
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return NS_OK;
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}
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// Give the binding manager a chance to get an interface for this element.
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return OwnerDoc()->BindingManager()->GetBindingImplementation(this, aIID,
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aInstancePtr);
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}
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EventStates
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Element::IntrinsicState() const
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{
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return IsEditable() ? NS_EVENT_STATE_MOZ_READWRITE :
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NS_EVENT_STATE_MOZ_READONLY;
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}
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void
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Element::NotifyStateChange(EventStates aStates)
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{
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nsIDocument* doc = GetComposedDoc();
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if (doc) {
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nsAutoScriptBlocker scriptBlocker;
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doc->ContentStateChanged(this, aStates);
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}
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}
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void
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Element::UpdateLinkState(EventStates aState)
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{
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MOZ_ASSERT(!aState.HasAtLeastOneOfStates(~(NS_EVENT_STATE_VISITED |
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NS_EVENT_STATE_UNVISITED)),
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"Unexpected link state bits");
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mState =
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(mState & ~(NS_EVENT_STATE_VISITED | NS_EVENT_STATE_UNVISITED)) |
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aState;
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}
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void
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Element::UpdateState(bool aNotify)
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{
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EventStates oldState = mState;
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mState = IntrinsicState() | (oldState & EXTERNALLY_MANAGED_STATES);
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if (aNotify) {
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EventStates changedStates = oldState ^ mState;
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if (!changedStates.IsEmpty()) {
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nsIDocument* doc = GetComposedDoc();
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if (doc) {
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nsAutoScriptBlocker scriptBlocker;
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doc->ContentStateChanged(this, changedStates);
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}
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}
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}
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}
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void
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nsIContent::UpdateEditableState(bool aNotify)
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{
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// Guaranteed to be non-element content
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NS_ASSERTION(!IsElement(), "What happened here?");
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nsIContent *parent = GetParent();
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// Skip over unknown native anonymous content to avoid setting a flag we
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// can't clear later
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bool isUnknownNativeAnon = false;
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if (IsInNativeAnonymousSubtree()) {
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isUnknownNativeAnon = true;
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nsCOMPtr<nsIContent> root = this;
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while (root && !root->IsRootOfNativeAnonymousSubtree()) {
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root = root->GetParent();
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}
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// root should always be true here, but isn't -- bug 999416
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if (root) {
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nsIFrame* rootFrame = root->GetPrimaryFrame();
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if (rootFrame) {
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nsContainerFrame* parentFrame = rootFrame->GetParent();
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nsITextControlFrame* textCtrl = do_QueryFrame(parentFrame);
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isUnknownNativeAnon = !textCtrl;
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}
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}
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}
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SetEditableFlag(parent && parent->HasFlag(NODE_IS_EDITABLE) &&
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!isUnknownNativeAnon);
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}
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void
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Element::UpdateEditableState(bool aNotify)
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{
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nsIContent *parent = GetParent();
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SetEditableFlag(parent && parent->HasFlag(NODE_IS_EDITABLE));
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if (aNotify) {
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UpdateState(aNotify);
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} else {
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// Avoid calling UpdateState in this very common case, because
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// this gets called for pretty much every single element on
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// insertion into the document and UpdateState can be slow for
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// some kinds of elements even when not notifying.
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if (IsEditable()) {
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RemoveStatesSilently(NS_EVENT_STATE_MOZ_READONLY);
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AddStatesSilently(NS_EVENT_STATE_MOZ_READWRITE);
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} else {
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RemoveStatesSilently(NS_EVENT_STATE_MOZ_READWRITE);
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AddStatesSilently(NS_EVENT_STATE_MOZ_READONLY);
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}
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}
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}
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int32_t
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Element::TabIndex()
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{
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const nsAttrValue* attrVal = mAttrs.GetAttr(nsGkAtoms::tabindex);
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if (attrVal && attrVal->Type() == nsAttrValue::eInteger) {
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return attrVal->GetIntegerValue();
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}
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return TabIndexDefault();
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}
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void
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Element::Focus(mozilla::ErrorResult& aError)
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{
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nsFocusManager* fm = nsFocusManager::GetFocusManager();
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// Also other browsers seem to have the hack to not re-focus (and flush) when
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// the element is already focused.
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if (fm) {
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if (fm->CanSkipFocus(this)) {
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fm->NeedsFlushBeforeEventHandling(this);
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} else {
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aError = fm->SetFocus(this, 0);
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}
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}
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}
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void
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Element::SetTabIndex(int32_t aTabIndex, mozilla::ErrorResult& aError)
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{
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nsAutoString value;
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value.AppendInt(aTabIndex);
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SetAttr(nsGkAtoms::tabindex, value, aError);
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}
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void
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Element::SetXBLBinding(nsXBLBinding* aBinding,
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nsBindingManager* aOldBindingManager)
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{
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nsBindingManager* bindingManager;
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if (aOldBindingManager) {
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MOZ_ASSERT(!aBinding, "aOldBindingManager should only be provided "
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"when removing a binding.");
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bindingManager = aOldBindingManager;
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} else {
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bindingManager = OwnerDoc()->BindingManager();
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}
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// After this point, aBinding will be the most-derived binding for aContent.
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// If we already have a binding for aContent, make sure to
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// remove it from the attached stack. Otherwise we might end up firing its
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// constructor twice (if aBinding inherits from it) or firing its constructor
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// after aContent has been deleted (if aBinding is null and the content node
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// dies before we process mAttachedStack).
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RefPtr<nsXBLBinding> oldBinding = GetXBLBinding();
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if (oldBinding) {
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bindingManager->RemoveFromAttachedQueue(oldBinding);
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}
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if (aBinding) {
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SetFlags(NODE_MAY_BE_IN_BINDING_MNGR);
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nsExtendedDOMSlots* slots = ExtendedDOMSlots();
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slots->mXBLBinding = aBinding;
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bindingManager->AddBoundContent(this);
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} else {
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nsExtendedDOMSlots* slots = GetExistingExtendedDOMSlots();
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if (slots) {
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slots->mXBLBinding = nullptr;
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}
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bindingManager->RemoveBoundContent(this);
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if (oldBinding) {
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oldBinding->SetBoundElement(nullptr);
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}
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}
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}
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void
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Element::SetShadowRoot(ShadowRoot* aShadowRoot)
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{
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nsExtendedDOMSlots* slots = ExtendedDOMSlots();
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slots->mShadowRoot = aShadowRoot;
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}
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void
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Element::Blur(mozilla::ErrorResult& aError)
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{
|
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if (!ShouldBlur(this)) {
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return;
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}
|
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|
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nsIDocument* doc = GetComposedDoc();
|
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if (!doc) {
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return;
|
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}
|
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nsPIDOMWindowOuter* win = doc->GetWindow();
|
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nsIFocusManager* fm = nsFocusManager::GetFocusManager();
|
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if (win && fm) {
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aError = fm->ClearFocus(win);
|
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}
|
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}
|
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|
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EventStates
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Element::StyleStateFromLocks() const
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{
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StyleStateLocks locksAndValues = LockedStyleStates();
|
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EventStates locks = locksAndValues.mLocks;
|
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EventStates values = locksAndValues.mValues;
|
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EventStates state = (mState & ~locks) | (locks & values);
|
||
|
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if (state.HasState(NS_EVENT_STATE_VISITED)) {
|
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return state & ~NS_EVENT_STATE_UNVISITED;
|
||
}
|
||
if (state.HasState(NS_EVENT_STATE_UNVISITED)) {
|
||
return state & ~NS_EVENT_STATE_VISITED;
|
||
}
|
||
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return state;
|
||
}
|
||
|
||
Element::StyleStateLocks
|
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Element::LockedStyleStates() const
|
||
{
|
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StyleStateLocks* locks =
|
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static_cast<StyleStateLocks*>(GetProperty(nsGkAtoms::lockedStyleStates));
|
||
if (locks) {
|
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return *locks;
|
||
}
|
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return StyleStateLocks();
|
||
}
|
||
|
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void
|
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Element::NotifyStyleStateChange(EventStates aStates)
|
||
{
|
||
nsIDocument* doc = GetComposedDoc();
|
||
if (doc) {
|
||
nsIPresShell *presShell = doc->GetShell();
|
||
if (presShell) {
|
||
nsAutoScriptBlocker scriptBlocker;
|
||
presShell->ContentStateChanged(doc, this, aStates);
|
||
}
|
||
}
|
||
}
|
||
|
||
void
|
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Element::LockStyleStates(EventStates aStates, bool aEnabled)
|
||
{
|
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StyleStateLocks* locks = new StyleStateLocks(LockedStyleStates());
|
||
|
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locks->mLocks |= aStates;
|
||
if (aEnabled) {
|
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locks->mValues |= aStates;
|
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} else {
|
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locks->mValues &= ~aStates;
|
||
}
|
||
|
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if (aStates.HasState(NS_EVENT_STATE_VISITED)) {
|
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locks->mLocks &= ~NS_EVENT_STATE_UNVISITED;
|
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}
|
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if (aStates.HasState(NS_EVENT_STATE_UNVISITED)) {
|
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locks->mLocks &= ~NS_EVENT_STATE_VISITED;
|
||
}
|
||
|
||
SetProperty(nsGkAtoms::lockedStyleStates, locks,
|
||
nsINode::DeleteProperty<StyleStateLocks>);
|
||
SetHasLockedStyleStates();
|
||
|
||
NotifyStyleStateChange(aStates);
|
||
}
|
||
|
||
void
|
||
Element::UnlockStyleStates(EventStates aStates)
|
||
{
|
||
StyleStateLocks* locks = new StyleStateLocks(LockedStyleStates());
|
||
|
||
locks->mLocks &= ~aStates;
|
||
|
||
if (locks->mLocks.IsEmpty()) {
|
||
DeleteProperty(nsGkAtoms::lockedStyleStates);
|
||
ClearHasLockedStyleStates();
|
||
delete locks;
|
||
}
|
||
else {
|
||
SetProperty(nsGkAtoms::lockedStyleStates, locks,
|
||
nsINode::DeleteProperty<StyleStateLocks>);
|
||
}
|
||
|
||
NotifyStyleStateChange(aStates);
|
||
}
|
||
|
||
void
|
||
Element::ClearStyleStateLocks()
|
||
{
|
||
StyleStateLocks locks = LockedStyleStates();
|
||
|
||
DeleteProperty(nsGkAtoms::lockedStyleStates);
|
||
ClearHasLockedStyleStates();
|
||
|
||
NotifyStyleStateChange(locks.mLocks);
|
||
}
|
||
|
||
static bool
|
||
IsLikelyCustomElement(const nsXULElement& aElement)
|
||
{
|
||
const CustomElementData* data = aElement.GetCustomElementData();
|
||
if (!data) {
|
||
return false;
|
||
}
|
||
|
||
const CustomElementRegistry* registry =
|
||
nsContentUtils::GetCustomElementRegistry(aElement.OwnerDoc());
|
||
if (!registry) {
|
||
return false;
|
||
}
|
||
|
||
return registry->IsLikelyToBeCustomElement(data->GetCustomElementType());
|
||
}
|
||
|
||
static bool
|
||
MayNeedToLoadXBLBinding(const nsIDocument& aDocument, const Element& aElement)
|
||
{
|
||
// If we have a frame, the frame has already loaded the binding.
|
||
// 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 or embed).
|
||
if (!aDocument.GetShell() || aElement.GetPrimaryFrame()) {
|
||
return false;
|
||
}
|
||
|
||
if (auto* xulElem = nsXULElement::FromNode(aElement)) {
|
||
return !IsLikelyCustomElement(*xulElem);
|
||
}
|
||
|
||
return aElement.IsAnyOfHTMLElements(nsGkAtoms::object, nsGkAtoms::embed);
|
||
}
|
||
|
||
bool
|
||
Element::GetBindingURL(nsIDocument *aDocument, css::URLValue **aResult)
|
||
{
|
||
if (!MayNeedToLoadXBLBinding(*aDocument, *this)) {
|
||
*aResult = nullptr;
|
||
return true;
|
||
}
|
||
|
||
// Get the computed -moz-binding directly from the ComputedStyle
|
||
RefPtr<ComputedStyle> sc =
|
||
nsComputedDOMStyle::GetComputedStyleNoFlush(this, nullptr);
|
||
NS_ENSURE_TRUE(sc, false);
|
||
|
||
NS_IF_ADDREF(*aResult = sc->StyleDisplay()->mBinding);
|
||
return true;
|
||
}
|
||
|
||
JSObject*
|
||
Element::WrapObject(JSContext *aCx, JS::Handle<JSObject*> aGivenProto)
|
||
{
|
||
JS::Rooted<JSObject*> obj(aCx, nsINode::WrapObject(aCx, aGivenProto));
|
||
if (!obj) {
|
||
return nullptr;
|
||
}
|
||
|
||
nsIDocument* 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 ComputedStyle goes away _before_ we load the binding
|
||
// since that can destroy the relevant presshell.
|
||
|
||
{
|
||
// Make a scope so that ~nsRefPtr can GC before returning obj.
|
||
RefPtr<css::URLValue> bindingURL;
|
||
bool ok = GetBindingURL(doc, getter_AddRefs(bindingURL));
|
||
if (!ok) {
|
||
dom::Throw(aCx, NS_ERROR_FAILURE);
|
||
return nullptr;
|
||
}
|
||
|
||
if (bindingURL) {
|
||
nsCOMPtr<nsIURI> uri = bindingURL->GetURI();
|
||
nsCOMPtr<nsIPrincipal> principal = bindingURL->mExtraData->Principal();
|
||
|
||
// 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;
|
||
}
|
||
|
||
RefPtr<nsXBLBinding> binding;
|
||
xblService->LoadBindings(this, uri, principal, getter_AddRefs(binding),
|
||
&dummy);
|
||
|
||
if (binding) {
|
||
if (nsContentUtils::IsSafeToRunScript()) {
|
||
binding->ExecuteAttachedHandler();
|
||
} else {
|
||
nsContentUtils::AddScriptRunner(
|
||
NewRunnableMethod("nsXBLBinding::ExecuteAttachedHandler",
|
||
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::GetAttributeNames(nsTArray<nsString>& aResult)
|
||
{
|
||
uint32_t count = mAttrs.AttrCount();
|
||
for (uint32_t i = 0; i < count; ++i) {
|
||
const nsAttrName* name = mAttrs.AttrNameAt(i);
|
||
name->GetQualifiedName(*aResult.AppendElement());
|
||
}
|
||
}
|
||
|
||
already_AddRefed<nsIHTMLCollection>
|
||
Element::GetElementsByTagName(const nsAString& aLocalName)
|
||
{
|
||
return NS_GetContentList(this, kNameSpaceID_Unknown, aLocalName);
|
||
}
|
||
|
||
nsIScrollableFrame*
|
||
Element::GetScrollFrame(nsIFrame **aFrame, FlushType aFlushType)
|
||
{
|
||
// it isn't clear what to return for SVG nodes, so just return nothing
|
||
if (IsSVGElement()) {
|
||
if (aFrame) {
|
||
*aFrame = nullptr;
|
||
}
|
||
return nullptr;
|
||
}
|
||
|
||
nsIFrame* frame = GetPrimaryFrame(aFlushType);
|
||
if (aFrame) {
|
||
*aFrame = frame;
|
||
}
|
||
if (frame) {
|
||
// menu frames implement GetScrollTargetFrame but we don't want
|
||
// to use it here. Similar for comboboxes.
|
||
LayoutFrameType type = frame->Type();
|
||
if (type != LayoutFrameType::Menu &&
|
||
type != LayoutFrameType::ComboboxControl) {
|
||
nsIScrollableFrame *scrollFrame = frame->GetScrollTargetFrame();
|
||
if (scrollFrame) {
|
||
MOZ_ASSERT(!OwnerDoc()->IsScrollingElement(this),
|
||
"How can we have a scrollframe if we're the "
|
||
"scrollingElement for our document?");
|
||
return scrollFrame;
|
||
}
|
||
}
|
||
}
|
||
|
||
nsIDocument* doc = OwnerDoc();
|
||
// Note: This IsScrollingElement() call can flush frames, if we're the body of
|
||
// a quirks mode document.
|
||
bool isScrollingElement = OwnerDoc()->IsScrollingElement(this);
|
||
// Now reget *aStyledFrame if the caller asked for it, because that frame
|
||
// flush can kill it.
|
||
if (aFrame) {
|
||
*aFrame = GetPrimaryFrame(FlushType::None);
|
||
}
|
||
|
||
if (isScrollingElement) {
|
||
// Our scroll info should map to the root scrollable frame if there is one.
|
||
if (nsIPresShell* shell = doc->GetShell()) {
|
||
return shell->GetRootScrollFrameAsScrollable();
|
||
}
|
||
}
|
||
|
||
return nullptr;
|
||
}
|
||
|
||
void
|
||
Element::ScrollIntoView(const BooleanOrScrollIntoViewOptions& aObject)
|
||
{
|
||
if (aObject.IsScrollIntoViewOptions()) {
|
||
return ScrollIntoView(aObject.GetAsScrollIntoViewOptions());
|
||
}
|
||
|
||
MOZ_DIAGNOSTIC_ASSERT(aObject.IsBoolean());
|
||
|
||
ScrollIntoViewOptions options;
|
||
if (aObject.GetAsBoolean()) {
|
||
options.mBlock = ScrollLogicalPosition::Start;
|
||
options.mInline = ScrollLogicalPosition::Nearest;
|
||
} else {
|
||
options.mBlock = ScrollLogicalPosition::End;
|
||
options.mInline = ScrollLogicalPosition::Nearest;
|
||
}
|
||
return ScrollIntoView(options);
|
||
}
|
||
|
||
void
|
||
Element::ScrollIntoView(const ScrollIntoViewOptions &aOptions)
|
||
{
|
||
nsIDocument *document = GetComposedDoc();
|
||
if (!document) {
|
||
return;
|
||
}
|
||
|
||
// Get the presentation shell
|
||
nsCOMPtr<nsIPresShell> presShell = document->GetShell();
|
||
if (!presShell) {
|
||
return;
|
||
}
|
||
|
||
int16_t vpercent = nsIPresShell::SCROLL_CENTER;
|
||
switch (aOptions.mBlock) {
|
||
case ScrollLogicalPosition::Start:
|
||
vpercent = nsIPresShell::SCROLL_TOP;
|
||
break;
|
||
case ScrollLogicalPosition::Center:
|
||
vpercent = nsIPresShell::SCROLL_CENTER;
|
||
break;
|
||
case ScrollLogicalPosition::End:
|
||
vpercent = nsIPresShell::SCROLL_BOTTOM;
|
||
break;
|
||
case ScrollLogicalPosition::Nearest:
|
||
vpercent = nsIPresShell::SCROLL_MINIMUM;
|
||
break;
|
||
default:
|
||
MOZ_ASSERT_UNREACHABLE("Unexpected ScrollLogicalPosition value");
|
||
}
|
||
|
||
int16_t hpercent = nsIPresShell::SCROLL_CENTER;
|
||
switch (aOptions.mInline) {
|
||
case ScrollLogicalPosition::Start:
|
||
hpercent = nsIPresShell::SCROLL_LEFT;
|
||
break;
|
||
case ScrollLogicalPosition::Center:
|
||
hpercent = nsIPresShell::SCROLL_CENTER;
|
||
break;
|
||
case ScrollLogicalPosition::End:
|
||
hpercent = nsIPresShell::SCROLL_RIGHT;
|
||
break;
|
||
case ScrollLogicalPosition::Nearest:
|
||
hpercent = nsIPresShell::SCROLL_MINIMUM;
|
||
break;
|
||
default:
|
||
MOZ_ASSERT_UNREACHABLE("Unexpected ScrollLogicalPosition value");
|
||
}
|
||
|
||
uint32_t flags = nsIPresShell::SCROLL_OVERFLOW_HIDDEN;
|
||
if (aOptions.mBehavior == ScrollBehavior::Smooth) {
|
||
flags |= nsIPresShell::SCROLL_SMOOTH;
|
||
} else if (aOptions.mBehavior == ScrollBehavior::Auto) {
|
||
flags |= nsIPresShell::SCROLL_SMOOTH_AUTO;
|
||
}
|
||
|
||
presShell->ScrollContentIntoView(this,
|
||
nsIPresShell::ScrollAxis(
|
||
vpercent,
|
||
nsIPresShell::SCROLL_ALWAYS),
|
||
nsIPresShell::ScrollAxis(
|
||
hpercent,
|
||
nsIPresShell::SCROLL_ALWAYS),
|
||
flags);
|
||
}
|
||
|
||
void
|
||
Element::Scroll(const CSSIntPoint& aScroll, const ScrollOptions& aOptions)
|
||
{
|
||
nsIScrollableFrame* sf = GetScrollFrame();
|
||
if (sf) {
|
||
nsIScrollableFrame::ScrollMode scrollMode = nsIScrollableFrame::INSTANT;
|
||
if (aOptions.mBehavior == ScrollBehavior::Smooth) {
|
||
scrollMode = nsIScrollableFrame::SMOOTH_MSD;
|
||
} else if (aOptions.mBehavior == ScrollBehavior::Auto) {
|
||
ScrollStyles styles = sf->GetScrollStyles();
|
||
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)
|
||
{
|
||
// When aScrollTop is 0, we don't need to flush layout to scroll to that
|
||
// point; we know 0 is always in range. At least we think so... But we do
|
||
// need to flush frames so we ensure we find the right scrollable frame if
|
||
// there is one.
|
||
//
|
||
// If aScrollTop is nonzero, we need to flush layout because we need to figure
|
||
// out what our real scrollTopMax is.
|
||
FlushType flushType = aScrollTop == 0 ? FlushType::Frames : FlushType::Layout;
|
||
nsIScrollableFrame* sf = GetScrollFrame(nullptr, flushType);
|
||
if (sf) {
|
||
nsIScrollableFrame::ScrollMode scrollMode = nsIScrollableFrame::INSTANT;
|
||
if (sf->GetScrollStyles().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)
|
||
{
|
||
// We can't assume things here based on the value of aScrollLeft, because
|
||
// depending on our direction and layout 0 may or may not be in our scroll
|
||
// range. So we need to flush layout no matter what.
|
||
nsIScrollableFrame* sf = GetScrollFrame();
|
||
if (sf) {
|
||
nsIScrollableFrame::ScrollMode scrollMode = nsIScrollableFrame::INSTANT;
|
||
if (sf->GetScrollStyles().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, FlushType::None);
|
||
if (!sf) {
|
||
return false;
|
||
}
|
||
|
||
AutoWeakFrame 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, FlushType::None);
|
||
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;
|
||
|
||
nsIFrame* frame;
|
||
nsIScrollableFrame* sf = GetScrollFrame(&frame);
|
||
nscoord height;
|
||
if (sf) {
|
||
height = sf->GetScrollRange().Height() + sf->GetScrollPortRect().Height();
|
||
} else {
|
||
height = GetScrollRectSizeForOverflowVisibleFrame(frame).height;
|
||
}
|
||
|
||
return nsPresContext::AppUnitsToIntCSSPixels(height);
|
||
}
|
||
|
||
int32_t
|
||
Element::ScrollWidth()
|
||
{
|
||
if (IsSVGElement())
|
||
return 0;
|
||
|
||
nsIFrame* frame;
|
||
nsIScrollableFrame* sf = GetScrollFrame(&frame);
|
||
nscoord width;
|
||
if (sf) {
|
||
width = sf->GetScrollRange().Width() + sf->GetScrollPortRect().Width();
|
||
} else {
|
||
width = GetScrollRectSizeForOverflowVisibleFrame(frame).width;
|
||
}
|
||
|
||
return nsPresContext::AppUnitsToIntCSSPixels(width);
|
||
}
|
||
|
||
nsRect
|
||
Element::GetClientAreaRect()
|
||
{
|
||
nsIFrame* frame;
|
||
nsIScrollableFrame* sf = GetScrollFrame(&frame);
|
||
|
||
if (sf) {
|
||
return sf->GetScrollPortRect();
|
||
}
|
||
|
||
if (frame &&
|
||
// The display check is OK even though we're not looking at the style
|
||
// frame, because the style frame only differs from "frame" for tables,
|
||
// and table wrappers have the same display as the table itself.
|
||
(frame->StyleDisplay()->mDisplay != StyleDisplay::Inline ||
|
||
frame->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 frame->GetPaddingRect() - frame->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(FlushType::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(FlushType::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(nsAtom* 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;
|
||
}
|
||
|
||
nsAtom* id = DoGetID();
|
||
if (IsInShadowTree()) {
|
||
ShadowRoot* containingShadow = GetContainingShadow();
|
||
// Check for containingShadow because it may have
|
||
// been deleted during unlinking.
|
||
if (containingShadow) {
|
||
containingShadow->RemoveFromIdTable(this, id);
|
||
}
|
||
} else {
|
||
nsIDocument* doc = GetUncomposedDoc();
|
||
if (doc && (!IsInAnonymousSubtree() || doc->IsXULDocument())) {
|
||
doc->RemoveFromIdTable(this, id);
|
||
}
|
||
}
|
||
}
|
||
|
||
void
|
||
Element::SetSlot(const nsAString& aName, ErrorResult& aError)
|
||
{
|
||
aError = SetAttr(kNameSpaceID_None, nsGkAtoms::slot, aName, true);
|
||
}
|
||
|
||
void
|
||
Element::GetSlot(nsAString& aName)
|
||
{
|
||
GetAttr(kNameSpaceID_None, nsGkAtoms::slot, aName);
|
||
}
|
||
|
||
// https://dom.spec.whatwg.org/#dom-element-shadowroot
|
||
ShadowRoot*
|
||
Element::GetShadowRootByMode() const
|
||
{
|
||
/**
|
||
* 1. Let shadow be context object’s shadow root.
|
||
* 2. If shadow is null or its mode is "closed", then return null.
|
||
*/
|
||
ShadowRoot* shadowRoot = GetShadowRoot();
|
||
if (!shadowRoot || shadowRoot->IsClosed()) {
|
||
return nullptr;
|
||
}
|
||
|
||
/**
|
||
* 3. Return shadow.
|
||
*/
|
||
return shadowRoot;
|
||
}
|
||
|
||
// https://dom.spec.whatwg.org/#dom-element-attachshadow
|
||
already_AddRefed<ShadowRoot>
|
||
Element::AttachShadow(const ShadowRootInit& aInit, ErrorResult& aError)
|
||
{
|
||
/**
|
||
* 1. If context object’s namespace is not the HTML namespace,
|
||
* then throw a "NotSupportedError" DOMException.
|
||
*/
|
||
if (!IsHTMLElement() &&
|
||
!(XRE_IsParentProcess() && IsXULElement() && nsContentUtils::AllowXULXBLForPrincipal(NodePrincipal()))) {
|
||
aError.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
|
||
return nullptr;
|
||
}
|
||
|
||
/**
|
||
* 2. If context object’s local name is not
|
||
* a valid custom element name, "article", "aside", "blockquote",
|
||
* "body", "div", "footer", "h1", "h2", "h3", "h4", "h5", "h6",
|
||
* "header", "main" "nav", "p", "section", or "span",
|
||
* then throw a "NotSupportedError" DOMException.
|
||
*/
|
||
nsAtom* nameAtom = NodeInfo()->NameAtom();
|
||
if (!(nsContentUtils::IsCustomElementName(nameAtom, NodeInfo()->NamespaceID()) ||
|
||
nameAtom == nsGkAtoms::article ||
|
||
nameAtom == nsGkAtoms::aside ||
|
||
nameAtom == nsGkAtoms::blockquote ||
|
||
nameAtom == nsGkAtoms::body ||
|
||
nameAtom == nsGkAtoms::div ||
|
||
nameAtom == nsGkAtoms::footer ||
|
||
nameAtom == nsGkAtoms::h1 ||
|
||
nameAtom == nsGkAtoms::h2 ||
|
||
nameAtom == nsGkAtoms::h3 ||
|
||
nameAtom == nsGkAtoms::h4 ||
|
||
nameAtom == nsGkAtoms::h5 ||
|
||
nameAtom == nsGkAtoms::h6 ||
|
||
nameAtom == nsGkAtoms::header ||
|
||
nameAtom == nsGkAtoms::main ||
|
||
nameAtom == nsGkAtoms::nav ||
|
||
nameAtom == nsGkAtoms::p ||
|
||
nameAtom == nsGkAtoms::section ||
|
||
nameAtom == nsGkAtoms::span)) {
|
||
aError.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
|
||
return nullptr;
|
||
}
|
||
|
||
/**
|
||
* 3. If context object is a shadow host, then throw
|
||
* an "InvalidStateError" DOMException.
|
||
*/
|
||
if (GetShadowRoot() || GetXBLBinding()) {
|
||
aError.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
|
||
return nullptr;
|
||
}
|
||
|
||
if (StaticPrefs::dom_webcomponents_shadowdom_report_usage()) {
|
||
OwnerDoc()->ReportShadowDOMUsage();
|
||
}
|
||
|
||
return AttachShadowWithoutNameChecks(aInit.mMode);
|
||
}
|
||
|
||
already_AddRefed<ShadowRoot>
|
||
Element::AttachShadowWithoutNameChecks(ShadowRootMode aMode)
|
||
{
|
||
nsAutoScriptBlocker scriptBlocker;
|
||
|
||
RefPtr<mozilla::dom::NodeInfo> nodeInfo =
|
||
mNodeInfo->NodeInfoManager()->GetNodeInfo(
|
||
nsGkAtoms::documentFragmentNodeName, nullptr, kNameSpaceID_None,
|
||
DOCUMENT_FRAGMENT_NODE);
|
||
|
||
if (nsIDocument* doc = GetComposedDoc()) {
|
||
if (nsIPresShell* shell = doc->GetShell()) {
|
||
shell->DestroyFramesForAndRestyle(this);
|
||
}
|
||
}
|
||
MOZ_ASSERT(!GetPrimaryFrame());
|
||
|
||
/**
|
||
* 4. Let shadow be a new shadow root whose node document is
|
||
* context object’s node document, host is context object,
|
||
* and mode is init’s mode.
|
||
*/
|
||
RefPtr<ShadowRoot> shadowRoot =
|
||
new ShadowRoot(this, aMode, nodeInfo.forget());
|
||
|
||
if (NodeOrAncestorHasDirAuto()) {
|
||
shadowRoot->SetAncestorHasDirAuto();
|
||
}
|
||
|
||
/**
|
||
* 5. Set context object’s shadow root to shadow.
|
||
*/
|
||
SetShadowRoot(shadowRoot);
|
||
|
||
// Dispatch a "shadowrootattached" event for devtools.
|
||
{
|
||
AsyncEventDispatcher* dispatcher =
|
||
new AsyncEventDispatcher(this,
|
||
NS_LITERAL_STRING("shadowrootattached"),
|
||
CanBubble::eYes,
|
||
ChromeOnlyDispatch::eYes,
|
||
Composed::eYes);
|
||
dispatcher->PostDOMEvent();
|
||
}
|
||
|
||
/**
|
||
* 6. Return shadow.
|
||
*/
|
||
return shadowRoot.forget();
|
||
}
|
||
|
||
void
|
||
Element::UnattachShadow()
|
||
{
|
||
RefPtr<ShadowRoot> shadowRoot = GetShadowRoot();
|
||
if (!shadowRoot) {
|
||
return;
|
||
}
|
||
|
||
nsAutoScriptBlocker scriptBlocker;
|
||
|
||
nsIDocument* doc = GetComposedDoc();
|
||
if (doc) {
|
||
if (nsIPresShell* shell = doc->GetShell()) {
|
||
shell->DestroyFramesForAndRestyle(this);
|
||
}
|
||
}
|
||
MOZ_ASSERT(!GetPrimaryFrame());
|
||
|
||
// Simply unhook the shadow root from the element.
|
||
MOZ_ASSERT(!shadowRoot->HasSlots(), "Won't work when shadow root has slots!");
|
||
shadowRoot->Unbind();
|
||
SetShadowRoot(nullptr);
|
||
}
|
||
|
||
void
|
||
Element::GetAttribute(const nsAString& aName, DOMString& aReturn)
|
||
{
|
||
const nsAttrValue* val =
|
||
mAttrs.GetAttr(aName,
|
||
IsHTMLElement() && IsInHTMLDocument() ?
|
||
eIgnoreCase : eCaseMatters);
|
||
if (val) {
|
||
val->ToString(aReturn);
|
||
} else {
|
||
if (IsXULElement()) {
|
||
// XXX should be SetDOMStringToNull(aReturn);
|
||
// See bug 232598
|
||
// aReturn is already empty
|
||
} else {
|
||
aReturn.SetNull();
|
||
}
|
||
}
|
||
}
|
||
|
||
bool
|
||
Element::ToggleAttribute(const nsAString& aName,
|
||
const Optional<bool>& aForce,
|
||
nsIPrincipal* aTriggeringPrincipal,
|
||
ErrorResult& aError)
|
||
{
|
||
aError = nsContentUtils::CheckQName(aName, false);
|
||
if (aError.Failed()) {
|
||
return false;
|
||
}
|
||
|
||
nsAutoString nameToUse;
|
||
const nsAttrName* name = InternalGetAttrNameFromQName(aName, &nameToUse);
|
||
if (!name) {
|
||
if (aForce.WasPassed() && !aForce.Value()) {
|
||
return false;
|
||
}
|
||
RefPtr<nsAtom> nameAtom = NS_AtomizeMainThread(nameToUse);
|
||
if (!nameAtom) {
|
||
aError.Throw(NS_ERROR_OUT_OF_MEMORY);
|
||
return false;
|
||
}
|
||
aError = SetAttr(kNameSpaceID_None, nameAtom, EmptyString(), aTriggeringPrincipal, true);
|
||
return true;
|
||
}
|
||
if (aForce.WasPassed() && aForce.Value()) {
|
||
return true;
|
||
}
|
||
// Hold a strong reference here so that the atom or nodeinfo doesn't go
|
||
// away during UnsetAttr. If it did UnsetAttr would be left with a
|
||
// dangling pointer as argument without knowing it.
|
||
nsAttrName tmp(*name);
|
||
|
||
aError = UnsetAttr(name->NamespaceID(), name->LocalName(), true);
|
||
return false;
|
||
}
|
||
|
||
void
|
||
Element::SetAttribute(const nsAString& aName,
|
||
const nsAString& aValue,
|
||
nsIPrincipal* aTriggeringPrincipal,
|
||
ErrorResult& aError)
|
||
{
|
||
aError = nsContentUtils::CheckQName(aName, false);
|
||
if (aError.Failed()) {
|
||
return;
|
||
}
|
||
|
||
nsAutoString nameToUse;
|
||
const nsAttrName* name = InternalGetAttrNameFromQName(aName, &nameToUse);
|
||
if (!name) {
|
||
RefPtr<nsAtom> nameAtom = NS_AtomizeMainThread(nameToUse);
|
||
if (!nameAtom) {
|
||
aError.Throw(NS_ERROR_OUT_OF_MEMORY);
|
||
return;
|
||
}
|
||
aError = SetAttr(kNameSpaceID_None, nameAtom, aValue, aTriggeringPrincipal, true);
|
||
return;
|
||
}
|
||
|
||
aError = SetAttr(name->NamespaceID(), name->LocalName(), name->GetPrefix(),
|
||
aValue, aTriggeringPrincipal, true);
|
||
}
|
||
|
||
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)
|
||
{
|
||
return Attributes()->GetNamedItem(aName);
|
||
}
|
||
|
||
already_AddRefed<Attr>
|
||
Element::SetAttributeNode(Attr& aNewAttr, ErrorResult& aError)
|
||
{
|
||
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;
|
||
}
|
||
|
||
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;
|
||
}
|
||
|
||
RefPtr<nsAtom> name = NS_AtomizeMainThread(aLocalName);
|
||
bool hasAttr = GetAttr(nsid, name, aReturn);
|
||
if (!hasAttr) {
|
||
SetDOMStringToNull(aReturn);
|
||
}
|
||
}
|
||
|
||
void
|
||
Element::SetAttributeNS(const nsAString& aNamespaceURI,
|
||
const nsAString& aQualifiedName,
|
||
const nsAString& aValue,
|
||
nsIPrincipal* aTriggeringPrincipal,
|
||
ErrorResult& aError)
|
||
{
|
||
RefPtr<mozilla::dom::NodeInfo> ni;
|
||
aError =
|
||
nsContentUtils::GetNodeInfoFromQName(aNamespaceURI, aQualifiedName,
|
||
mNodeInfo->NodeInfoManager(),
|
||
ATTRIBUTE_NODE,
|
||
getter_AddRefs(ni));
|
||
if (aError.Failed()) {
|
||
return;
|
||
}
|
||
|
||
aError = SetAttr(ni->NamespaceID(), ni->NameAtom(), ni->GetPrefixAtom(),
|
||
aValue, aTriggeringPrincipal, true);
|
||
}
|
||
|
||
void
|
||
Element::RemoveAttributeNS(const nsAString& aNamespaceURI,
|
||
const nsAString& aLocalName,
|
||
ErrorResult& aError)
|
||
{
|
||
RefPtr<nsAtom> name = NS_AtomizeMainThread(aLocalName);
|
||
int32_t nsid =
|
||
nsContentUtils::NameSpaceManager()->GetNameSpaceID(aNamespaceURI,
|
||
nsContentUtils::IsChromeDoc(OwnerDoc()));
|
||
|
||
if (nsid == kNameSpaceID_Unknown) {
|
||
// If the namespace ID is unknown, it means there can't possibly be an
|
||
// existing attribute. We would need a known namespace ID to pass into
|
||
// UnsetAttr, so we return early if we don't have one.
|
||
return;
|
||
}
|
||
|
||
aError = UnsetAttr(nsid, name, true);
|
||
}
|
||
|
||
Attr*
|
||
Element::GetAttributeNodeNS(const nsAString& aNamespaceURI,
|
||
const nsAString& aLocalName)
|
||
{
|
||
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)
|
||
{
|
||
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);
|
||
}
|
||
|
||
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;
|
||
}
|
||
|
||
RefPtr<nsAtom> name = NS_AtomizeMainThread(aLocalName);
|
||
return HasAttr(nsid, name);
|
||
}
|
||
|
||
already_AddRefed<nsIHTMLCollection>
|
||
Element::GetElementsByClassName(const nsAString& aClassNames)
|
||
{
|
||
return nsContentUtils::GetElementsByClassName(this, aClassNames);
|
||
}
|
||
|
||
void
|
||
Element::GetElementsWithGrid(nsTArray<RefPtr<Element>>& aElements)
|
||
{
|
||
nsINode* cur = this;
|
||
while (cur) {
|
||
if (cur->IsElement()) {
|
||
Element* elem = cur->AsElement();
|
||
|
||
if (elem->GetPrimaryFrame()) {
|
||
// See if this has a GridContainerFrame. Use the same method that
|
||
// nsGridContainerFrame uses, which deals with some edge cases.
|
||
if (nsGridContainerFrame::GetGridContainerFrame(elem->GetPrimaryFrame())) {
|
||
aElements.AppendElement(elem);
|
||
}
|
||
|
||
// This element has a frame, so allow the traversal to go through
|
||
// the children.
|
||
cur = cur->GetNextNode(this);
|
||
continue;
|
||
}
|
||
}
|
||
|
||
// Either this isn't an element, or it has no frame. Continue with the
|
||
// traversal but ignore all the children.
|
||
cur = cur->GetNextNonChildNode(this);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 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::FromNode(aContent);
|
||
if (htmlElem) {
|
||
return htmlElem->EditableInclusiveDescendantCount();
|
||
}
|
||
|
||
return aContent->EditableDescendantCount();
|
||
}
|
||
|
||
nsresult
|
||
Element::BindToTree(nsIDocument* aDocument, nsIContent* aParent,
|
||
nsIContent* aBindingParent)
|
||
{
|
||
MOZ_ASSERT(aParent || aDocument, "Must have document if no parent!");
|
||
MOZ_ASSERT((NODE_FROM(aParent, aDocument)->OwnerDoc() == OwnerDoc()),
|
||
"Must have the same owner document");
|
||
MOZ_ASSERT(!aParent || aDocument == aParent->GetUncomposedDoc(),
|
||
"aDocument must be current doc of aParent");
|
||
MOZ_ASSERT(!IsInComposedDoc(), "Already have a document. Unbind first!");
|
||
MOZ_ASSERT(!IsInUncomposedDoc(), "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.
|
||
MOZ_ASSERT(!GetParent() || aParent == GetParent(),
|
||
"Already have a parent. Unbind first!");
|
||
MOZ_ASSERT(!GetBindingParent() ||
|
||
aBindingParent == GetBindingParent() ||
|
||
(!aBindingParent && aParent &&
|
||
aParent->GetBindingParent() == GetBindingParent()),
|
||
"Already have a binding parent. Unbind first!");
|
||
MOZ_ASSERT(aBindingParent != this,
|
||
"Content must not be its own binding parent");
|
||
MOZ_ASSERT(!IsRootOfNativeAnonymousSubtree() ||
|
||
aBindingParent == aParent,
|
||
"Native anonymous content must have its parent as its "
|
||
"own binding parent");
|
||
MOZ_ASSERT(aBindingParent || !aParent ||
|
||
aBindingParent == aParent->GetBindingParent(),
|
||
"We should be passed the right binding parent");
|
||
|
||
#ifdef MOZ_XUL
|
||
// First set the binding parent
|
||
nsXULElement* xulElem = nsXULElement::FromNode(this);
|
||
if (xulElem) {
|
||
xulElem->SetXULBindingParent(aBindingParent);
|
||
}
|
||
else
|
||
#endif
|
||
{
|
||
if (aBindingParent) {
|
||
nsExtendedDOMSlots* slots = ExtendedDOMSlots();
|
||
|
||
slots->mBindingParent = aBindingParent; // Weak, so no addref happens.
|
||
}
|
||
}
|
||
NS_ASSERTION(!aBindingParent || IsRootOfNativeAnonymousSubtree() ||
|
||
!HasFlag(NODE_IS_IN_NATIVE_ANONYMOUS_SUBTREE) ||
|
||
(aParent && aParent->IsInNativeAnonymousSubtree()),
|
||
"Trying to re-bind content from native anonymous subtree to "
|
||
"non-native anonymous parent!");
|
||
if (aParent) {
|
||
if (aParent->IsInNativeAnonymousSubtree()) {
|
||
SetFlags(NODE_IS_IN_NATIVE_ANONYMOUS_SUBTREE);
|
||
}
|
||
if (aParent->HasFlag(NODE_CHROME_ONLY_ACCESS)) {
|
||
SetFlags(NODE_CHROME_ONLY_ACCESS);
|
||
}
|
||
if (HasFlag(NODE_IS_ANONYMOUS_ROOT)) {
|
||
aParent->SetMayHaveAnonymousChildren();
|
||
}
|
||
if (aParent->IsInShadowTree()) {
|
||
ClearSubtreeRootPointer();
|
||
SetFlags(NODE_IS_IN_SHADOW_TREE);
|
||
MOZ_ASSERT(aParent->GetContainingShadow());
|
||
ExtendedDOMSlots()->mContainingShadow = aParent->GetContainingShadow();
|
||
}
|
||
}
|
||
|
||
bool hadParent = !!GetParentNode();
|
||
|
||
// Now set the parent.
|
||
if (aParent) {
|
||
if (!GetParent()) {
|
||
NS_ADDREF(aParent);
|
||
}
|
||
mParent = aParent;
|
||
} else {
|
||
mParent = aDocument;
|
||
}
|
||
SetParentIsContent(aParent);
|
||
|
||
// XXXbz sXBL/XBL2 issue!
|
||
|
||
MOZ_ASSERT(!HasAnyOfFlags(Element::kAllServoDescendantBits));
|
||
|
||
// 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();
|
||
SetIsConnected(true);
|
||
|
||
// Clear the lazy frame construction bits.
|
||
UnsetFlags(NODE_NEEDS_FRAME | NODE_DESCENDANTS_NEED_FRAMES);
|
||
} else if (IsInShadowTree()) {
|
||
SetIsConnected(aParent->IsInComposedDoc());
|
||
// 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.
|
||
//
|
||
// See the comment about the restyle bits above, it also applies.
|
||
UnsetFlags(NODE_NEEDS_FRAME | NODE_DESCENDANTS_NEED_FRAMES);
|
||
} else {
|
||
// If we're not in the doc and not in a shadow tree,
|
||
// update our subtree pointer.
|
||
SetSubtreeRootPointer(aParent->SubtreeRoot());
|
||
}
|
||
|
||
if (CustomElementRegistry::IsCustomElementEnabled(OwnerDoc()) && IsInComposedDoc()) {
|
||
// Connected callback must be enqueued whenever a custom element becomes
|
||
// connected.
|
||
CustomElementData* data = GetCustomElementData();
|
||
if (data) {
|
||
if (data->mState == CustomElementData::State::eCustom) {
|
||
nsContentUtils::EnqueueLifecycleCallback(nsIDocument::eConnected, this);
|
||
} else {
|
||
// Step 7.7.2.2 https://dom.spec.whatwg.org/#concept-node-insert
|
||
nsContentUtils::TryToUpgradeElement(this);
|
||
}
|
||
}
|
||
}
|
||
|
||
// 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;
|
||
|
||
UpdateEditableState(false);
|
||
|
||
// If we had a pre-existing XBL binding, we might have anonymous children that
|
||
// also need to be told that they are moving.
|
||
if (HasFlag(NODE_MAY_BE_IN_BINDING_MNGR)) {
|
||
nsXBLBinding* binding =
|
||
OwnerDoc()->BindingManager()->GetBindingWithContent(this);
|
||
|
||
if (binding) {
|
||
binding->BindAnonymousContent(
|
||
binding->GetAnonymousContent(),
|
||
this,
|
||
binding->PrototypeBinding()->ChromeOnlyContent());
|
||
}
|
||
}
|
||
|
||
// Now recurse into our kids
|
||
nsresult rv;
|
||
for (nsIContent* child = GetFirstChild(); child;
|
||
child = child->GetNextSibling()) {
|
||
rv = child->BindToTree(aDocument, this, aBindingParent);
|
||
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.
|
||
// But we don't cross Shadow DOM boundary.
|
||
// (The expected behavior with Shadow DOM is unclear)
|
||
nsIContent* parent = GetParent();
|
||
while (parent && parent->IsElement()) {
|
||
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, false);
|
||
}
|
||
|
||
// Call BindToTree on shadow root children.
|
||
if (ShadowRoot* shadowRoot = GetShadowRoot()) {
|
||
rv = shadowRoot->Bind();
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
}
|
||
|
||
// FIXME(emilio): Why is this needed? The element shouldn't even be styled in
|
||
// the first place, we should style it properly eventually.
|
||
//
|
||
// Also, if this _is_ needed, then it's wrong and should use GetComposedDoc()
|
||
// to account for Shadow DOM.
|
||
if (aDocument && MayHaveAnimations()) {
|
||
CSSPseudoElementType pseudoType = GetPseudoElementType();
|
||
if ((pseudoType == CSSPseudoElementType::NotPseudo ||
|
||
pseudoType == CSSPseudoElementType::before ||
|
||
pseudoType == CSSPseudoElementType::after) &&
|
||
EffectSet::GetEffectSet(this, pseudoType)) {
|
||
if (nsPresContext* presContext = aDocument->GetPresContext()) {
|
||
presContext->EffectCompositor()->
|
||
RequestRestyle(this, pseudoType,
|
||
EffectCompositor::RestyleType::Standard,
|
||
EffectCompositor::CascadeLevel::Animations);
|
||
}
|
||
}
|
||
}
|
||
|
||
// 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.
|
||
MOZ_ASSERT(aDocument == GetUncomposedDoc(), "Bound to wrong document");
|
||
MOZ_ASSERT(aParent == GetParent(), "Bound to wrong parent");
|
||
MOZ_ASSERT(aBindingParent == GetBindingParent(),
|
||
"Bound to wrong binding parent");
|
||
|
||
return NS_OK;
|
||
}
|
||
|
||
RemoveFromBindingManagerRunnable::RemoveFromBindingManagerRunnable(
|
||
nsBindingManager* aManager,
|
||
nsIContent* aContent,
|
||
nsIDocument* aDoc)
|
||
: mozilla::Runnable("dom::RemoveFromBindingManagerRunnable")
|
||
, 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;
|
||
}
|
||
|
||
static bool
|
||
ShouldRemoveFromIdTableOnUnbind(const Element& aElement, bool aNullParent)
|
||
{
|
||
if (aElement.IsInUncomposedDoc()) {
|
||
return true;
|
||
}
|
||
|
||
if (!aElement.IsInShadowTree()) {
|
||
return false;
|
||
}
|
||
|
||
return aNullParent || !aElement.GetParent()->IsInShadowTree();
|
||
}
|
||
|
||
void
|
||
Element::UnbindFromTree(bool aDeep, bool aNullParent)
|
||
{
|
||
MOZ_ASSERT(aDeep || (!GetUncomposedDoc() && !GetBindingParent()),
|
||
"Shallow unbind won't clear document and binding parent on "
|
||
"kids!");
|
||
|
||
// Make sure to only remove from the ID table if our subtree root is actually
|
||
// changing.
|
||
if (ShouldRemoveFromIdTableOnUnbind(*this, aNullParent)) {
|
||
RemoveFromIdTable();
|
||
}
|
||
|
||
// Make sure to unbind this node before doing the kids
|
||
nsIDocument* document = GetComposedDoc();
|
||
|
||
if (HasPointerLock()) {
|
||
nsIDocument::UnlockPointer();
|
||
}
|
||
if (mState.HasState(NS_EVENT_STATE_FULLSCREEN)) {
|
||
// The element being removed is an ancestor of the fullscreen element,
|
||
// exit fullscreen state.
|
||
nsContentUtils::ReportToConsole(nsIScriptError::warningFlag,
|
||
NS_LITERAL_CSTRING("DOM"), OwnerDoc(),
|
||
nsContentUtils::eDOM_PROPERTIES,
|
||
"RemovedFullscreenElement");
|
||
// Fully exit fullscreen.
|
||
nsIDocument::ExitFullscreenInDocTree(OwnerDoc());
|
||
}
|
||
|
||
if (HasServoData()) {
|
||
MOZ_ASSERT(document);
|
||
MOZ_ASSERT(IsInAnonymousSubtree());
|
||
}
|
||
|
||
if (document) {
|
||
ClearServoData(document);
|
||
}
|
||
|
||
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 (IsRootOfNativeAnonymousSubtree()) {
|
||
nsNodeUtils::NativeAnonymousChildListChange(this, true);
|
||
}
|
||
|
||
if (GetParent()) {
|
||
RefPtr<nsINode> p;
|
||
p.swap(mParent);
|
||
} else {
|
||
mParent = nullptr;
|
||
}
|
||
SetParentIsContent(false);
|
||
}
|
||
|
||
#ifdef DEBUG
|
||
// If we can get access to the PresContext, then we sanity-check that
|
||
// we're not leaving behind a pointer to ourselves as the PresContext's
|
||
// cached provider of the viewport's scrollbar styles.
|
||
if (document) {
|
||
nsPresContext* presContext = document->GetPresContext();
|
||
if (presContext) {
|
||
MOZ_ASSERT(this !=
|
||
presContext->GetViewportScrollStylesOverrideElement(),
|
||
"Leaving behind a raw pointer to this element (as having "
|
||
"propagated scrollbar styles) - that's dangerous...");
|
||
}
|
||
}
|
||
#endif
|
||
|
||
ClearInDocument();
|
||
SetIsConnected(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);
|
||
if (document) {
|
||
if (nsPresContext* presContext = document->GetPresContext()) {
|
||
// We have to clear all pending restyle requests for the animations on
|
||
// this element to avoid unnecessary restyles when we re-attached this
|
||
// element.
|
||
presContext->EffectCompositor()->ClearRestyleRequestsFor(this);
|
||
}
|
||
}
|
||
}
|
||
|
||
// 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());
|
||
}
|
||
|
||
bool clearBindingParent = true;
|
||
|
||
#ifdef MOZ_XUL
|
||
if (nsXULElement* xulElem = nsXULElement::FromNode(this)) {;
|
||
xulElem->SetXULBindingParent(nullptr);
|
||
clearBindingParent = false;
|
||
}
|
||
#endif
|
||
|
||
if (nsExtendedDOMSlots* slots = GetExistingExtendedDOMSlots()) {
|
||
if (clearBindingParent) {
|
||
slots->mBindingParent = nullptr;
|
||
}
|
||
if (aNullParent || !mParent->IsInShadowTree()) {
|
||
slots->mContainingShadow = nullptr;
|
||
}
|
||
}
|
||
|
||
if (document) {
|
||
if (HasFlag(NODE_MAY_BE_IN_BINDING_MNGR)) {
|
||
// Notify XBL- & nsIAnonymousContentCreator-generated anonymous content
|
||
// that the document is changing.
|
||
nsContentUtils::AddScriptRunner(
|
||
new RemoveFromBindingManagerRunnable(
|
||
document->BindingManager(), this, document));
|
||
nsXBLBinding* binding =
|
||
document->BindingManager()->GetBindingWithContent(this);
|
||
if (binding) {
|
||
nsXBLBinding::UnbindAnonymousContent(
|
||
document,
|
||
binding->GetAnonymousContent(),
|
||
/* aNullParent */ false);
|
||
}
|
||
}
|
||
|
||
document->ClearBoxObjectFor(this);
|
||
|
||
// Disconnected must be enqueued whenever a connected custom element becomes
|
||
// disconnected.
|
||
if (CustomElementRegistry::IsCustomElementEnabled(OwnerDoc())) {
|
||
CustomElementData* data = GetCustomElementData();
|
||
if (data) {
|
||
if (data->mState == CustomElementData::State::eCustom) {
|
||
nsContentUtils::EnqueueLifecycleCallback(nsIDocument::eDisconnected,
|
||
this);
|
||
} else {
|
||
// Remove an unresolved custom element that is a candidate for upgrade
|
||
// when a custom element is disconnected.
|
||
nsContentUtils::UnregisterUnresolvedElement(this);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
// 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) {
|
||
for (nsIContent* child = GetFirstChild(); child;
|
||
child = child->GetNextSibling()) {
|
||
// 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.
|
||
child->UnbindFromTree(true, false);
|
||
}
|
||
}
|
||
|
||
nsNodeUtils::ParentChainChanged(this);
|
||
|
||
// Unbind children of shadow root.
|
||
if (ShadowRoot* shadowRoot = GetShadowRoot()) {
|
||
shadowRoot->Unbind();
|
||
}
|
||
|
||
MOZ_ASSERT(!HasAnyOfFlags(kAllServoDescendantBits));
|
||
MOZ_ASSERT(!document || document->GetServoRestyleRoot() != this);
|
||
}
|
||
|
||
nsDOMCSSAttributeDeclaration*
|
||
Element::SMILOverrideStyle()
|
||
{
|
||
Element::nsExtendedDOMSlots* slots = ExtendedDOMSlots();
|
||
|
||
if (!slots->mSMILOverrideStyle) {
|
||
slots->mSMILOverrideStyle = new nsDOMCSSAttributeDeclaration(this, true);
|
||
}
|
||
|
||
return slots->mSMILOverrideStyle;
|
||
}
|
||
|
||
DeclarationBlock*
|
||
Element::GetSMILOverrideStyleDeclaration()
|
||
{
|
||
Element::nsExtendedDOMSlots* slots = GetExistingExtendedDOMSlots();
|
||
return slots ? slots->mSMILOverrideStyleDeclaration.get() : nullptr;
|
||
}
|
||
|
||
nsresult
|
||
Element::SetSMILOverrideStyleDeclaration(DeclarationBlock* aDeclaration,
|
||
bool aNotify)
|
||
{
|
||
Element::nsExtendedDOMSlots* slots = ExtendedDOMSlots();
|
||
|
||
slots->mSMILOverrideStyleDeclaration = aDeclaration;
|
||
|
||
if (aNotify) {
|
||
nsIDocument* doc = GetComposedDoc();
|
||
// Only need to request a restyle if we're in a document. (We might not
|
||
// be in a document, if we're clearing animation effects on a target node
|
||
// that's been detached since the previous animation sample.)
|
||
if (doc) {
|
||
nsCOMPtr<nsIPresShell> shell = doc->GetShell();
|
||
if (shell) {
|
||
shell->RestyleForAnimation(this, eRestyle_StyleAttribute_Animations);
|
||
}
|
||
}
|
||
}
|
||
|
||
return NS_OK;
|
||
}
|
||
|
||
bool
|
||
Element::IsLabelable() const
|
||
{
|
||
return false;
|
||
}
|
||
|
||
bool
|
||
Element::IsInteractiveHTMLContent(bool aIgnoreTabindex) const
|
||
{
|
||
return false;
|
||
}
|
||
|
||
DeclarationBlock*
|
||
Element::GetInlineStyleDeclaration() const
|
||
{
|
||
if (!MayHaveStyle()) {
|
||
return nullptr;
|
||
}
|
||
const nsAttrValue* attrVal = mAttrs.GetAttr(nsGkAtoms::style);
|
||
|
||
if (attrVal && attrVal->Type() == nsAttrValue::eCSSDeclaration) {
|
||
return attrVal->GetCSSDeclarationValue();
|
||
}
|
||
|
||
return nullptr;
|
||
}
|
||
|
||
const nsMappedAttributes*
|
||
Element::GetMappedAttributes() const
|
||
{
|
||
return mAttrs.GetMapped();
|
||
}
|
||
|
||
void
|
||
Element::InlineStyleDeclarationWillChange(MutationClosureData& aData)
|
||
{
|
||
MOZ_ASSERT_UNREACHABLE("Element::InlineStyleDeclarationWillChange");
|
||
}
|
||
|
||
nsresult
|
||
Element::SetInlineStyleDeclaration(DeclarationBlock& aDeclaration,
|
||
MutationClosureData& aData)
|
||
{
|
||
MOZ_ASSERT_UNREACHABLE("Element::SetInlineStyleDeclaration");
|
||
return NS_ERROR_NOT_IMPLEMENTED;
|
||
}
|
||
|
||
NS_IMETHODIMP_(bool)
|
||
Element::IsAttributeMapped(const nsAtom* aAttribute) const
|
||
{
|
||
return false;
|
||
}
|
||
|
||
nsChangeHint
|
||
Element::GetAttributeChangeHint(const nsAtom* aAttribute,
|
||
int32_t aModType) const
|
||
{
|
||
return nsChangeHint(0);
|
||
}
|
||
|
||
bool
|
||
Element::FindAttributeDependence(const nsAtom* 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, 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,
|
||
nsFocusManager::eOnlyCurrentWindow,
|
||
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 false;
|
||
}
|
||
|
||
/* static */
|
||
nsresult
|
||
Element::DispatchEvent(nsPresContext* aPresContext,
|
||
WidgetEvent* aEvent,
|
||
nsIContent* aTarget,
|
||
bool aFullDispatch,
|
||
nsEventStatus* aStatus)
|
||
{
|
||
MOZ_ASSERT(aTarget, "Must have target");
|
||
MOZ_ASSERT(aEvent, "Must have source event");
|
||
MOZ_ASSERT(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)
|
||
{
|
||
MOZ_ASSERT(aTarget, "Must have target");
|
||
MOZ_ASSERT(aSourceEvent, "Must have source event");
|
||
MOZ_ASSERT(aStatus, "Null out param?");
|
||
|
||
WidgetMouseEvent event(aSourceEvent->IsTrusted(), eMouseClick,
|
||
aSourceEvent->mWidget, WidgetMouseEvent::eReal);
|
||
event.mRefPoint = aSourceEvent->mRefPoint;
|
||
uint32_t clickCount = 1;
|
||
float pressure = 0;
|
||
uint32_t pointerId = 0; // Use the default value here.
|
||
uint16_t inputSource = 0;
|
||
WidgetMouseEvent* sourceMouseEvent = aSourceEvent->AsMouseEvent();
|
||
if (sourceMouseEvent) {
|
||
clickCount = sourceMouseEvent->mClickCount;
|
||
pressure = sourceMouseEvent->pressure;
|
||
pointerId = sourceMouseEvent->pointerId;
|
||
inputSource = sourceMouseEvent->inputSource;
|
||
} else if (aSourceEvent->mClass == eKeyboardEventClass) {
|
||
event.mFlags.mIsPositionless = true;
|
||
inputSource = MouseEvent_Binding::MOZ_SOURCE_KEYBOARD;
|
||
}
|
||
event.pressure = pressure;
|
||
event.mClickCount = clickCount;
|
||
event.pointerId = pointerId;
|
||
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(FlushType aType)
|
||
{
|
||
nsIDocument* doc = GetComposedDoc();
|
||
if (!doc) {
|
||
return nullptr;
|
||
}
|
||
|
||
// Cause a flush, so we get up-to-date frame
|
||
// information
|
||
if (aType != FlushType::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(nsAtom* 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;
|
||
}
|
||
|
||
MOZ_ASSERT(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 = mAttrs.GetExistingAttrNameFromQName(outStr);
|
||
if (val) {
|
||
outStr.Truncate();
|
||
}
|
||
} else {
|
||
val = mAttrs.GetExistingAttrNameFromQName(aStr);
|
||
if (!val && aNameToUse) {
|
||
*aNameToUse = aStr;
|
||
}
|
||
}
|
||
|
||
return val;
|
||
}
|
||
|
||
bool
|
||
Element::MaybeCheckSameAttrVal(int32_t aNamespaceID,
|
||
nsAtom* aName,
|
||
nsAtom* aPrefix,
|
||
const nsAttrValueOrString& aValue,
|
||
bool aNotify,
|
||
nsAttrValue& aOldValue,
|
||
uint8_t* aModType,
|
||
bool* aHasListeners,
|
||
bool* aOldValueSet)
|
||
{
|
||
bool modification = false;
|
||
*aHasListeners = aNotify &&
|
||
nsContentUtils::HasMutationListeners(this,
|
||
NS_EVENT_BITS_MUTATION_ATTRMODIFIED,
|
||
this);
|
||
*aOldValueSet = false;
|
||
|
||
// If we have no listeners and aNotify is false, we are almost certainly
|
||
// coming from the content sink and will almost certainly have no previous
|
||
// value. Even if we do, setting the value is cheap when we have no
|
||
// listeners and don't plan to notify. The check for aNotify here is an
|
||
// optimization, the check for *aHasListeners is a correctness issue.
|
||
if (*aHasListeners || aNotify) {
|
||
BorrowedAttrInfo info(GetAttrInfo(aNamespaceID, aName));
|
||
if (info.mValue) {
|
||
// Check whether the old value is the same as the new one. Note that we
|
||
// only need to actually _get_ the old value if we have listeners or
|
||
// if the element is a custom element (because it may have an
|
||
// attribute changed callback).
|
||
if (*aHasListeners || GetCustomElementData()) {
|
||
// Need to store the old value.
|
||
//
|
||
// If the current attribute value contains a pointer to some other data
|
||
// structure that gets updated in the process of setting the attribute
|
||
// we'll no longer have the old value of the attribute. Therefore, we
|
||
// should serialize the attribute value now to keep a snapshot.
|
||
//
|
||
// We have to serialize the value anyway in order to create the
|
||
// mutation event so there's no cost in doing it now.
|
||
aOldValue.SetToSerialized(*info.mValue);
|
||
*aOldValueSet = true;
|
||
}
|
||
bool valueMatches = aValue.EqualsAsStrings(*info.mValue);
|
||
if (valueMatches && aPrefix == info.mName->GetPrefix()) {
|
||
return true;
|
||
}
|
||
modification = true;
|
||
}
|
||
}
|
||
*aModType = modification ?
|
||
static_cast<uint8_t>(MutationEvent_Binding::MODIFICATION) :
|
||
static_cast<uint8_t>(MutationEvent_Binding::ADDITION);
|
||
return false;
|
||
}
|
||
|
||
bool
|
||
Element::OnlyNotifySameValueSet(int32_t aNamespaceID, nsAtom* aName,
|
||
nsAtom* aPrefix,
|
||
const nsAttrValueOrString& aValue,
|
||
bool aNotify, nsAttrValue& aOldValue,
|
||
uint8_t* aModType, bool* aHasListeners,
|
||
bool* aOldValueSet)
|
||
{
|
||
if (!MaybeCheckSameAttrVal(aNamespaceID, aName, aPrefix, aValue, aNotify,
|
||
aOldValue, aModType, aHasListeners,
|
||
aOldValueSet)) {
|
||
return false;
|
||
}
|
||
|
||
nsAutoScriptBlocker scriptBlocker;
|
||
nsNodeUtils::AttributeSetToCurrentValue(this, aNamespaceID, aName);
|
||
return true;
|
||
}
|
||
|
||
nsresult
|
||
Element::SetSingleClassFromParser(nsAtom* aSingleClassName)
|
||
{
|
||
// Keep this in sync with SetAttr and SetParsedAttr below.
|
||
|
||
nsAttrValue value(aSingleClassName);
|
||
|
||
nsIDocument* document = GetComposedDoc();
|
||
mozAutoDocUpdate updateBatch(document, false);
|
||
|
||
// In principle, BeforeSetAttr should be called here if a node type
|
||
// existed that wanted to do something special for class, but there
|
||
// is no such node type, so calling SetMayHaveClass() directly.
|
||
SetMayHaveClass();
|
||
|
||
return SetAttrAndNotify(kNameSpaceID_None,
|
||
nsGkAtoms::_class,
|
||
nullptr, // prefix
|
||
nullptr, // old value
|
||
value,
|
||
nullptr,
|
||
static_cast<uint8_t>(MutationEvent_Binding::ADDITION),
|
||
false, // hasListeners
|
||
false, // notify
|
||
kCallAfterSetAttr,
|
||
document,
|
||
updateBatch);
|
||
}
|
||
|
||
nsresult
|
||
Element::SetAttr(int32_t aNamespaceID, nsAtom* aName,
|
||
nsAtom* aPrefix, const nsAString& aValue,
|
||
nsIPrincipal* aSubjectPrincipal,
|
||
bool aNotify)
|
||
{
|
||
// Keep this in sync with SetParsedAttr below and SetSingleClassFromParser
|
||
// above.
|
||
|
||
NS_ENSURE_ARG_POINTER(aName);
|
||
NS_ASSERTION(aNamespaceID != kNameSpaceID_Unknown,
|
||
"Don't call SetAttr with unknown namespace");
|
||
|
||
uint8_t modType;
|
||
bool hasListeners;
|
||
// We don't want to spend time preparsing class attributes if the value is not
|
||
// changing, so just init our nsAttrValueOrString with aValue for the
|
||
// OnlyNotifySameValueSet call.
|
||
nsAttrValueOrString value(aValue);
|
||
nsAttrValue oldValue;
|
||
bool oldValueSet;
|
||
|
||
if (OnlyNotifySameValueSet(aNamespaceID, aName, aPrefix, value, aNotify,
|
||
oldValue, &modType, &hasListeners, &oldValueSet)) {
|
||
return OnAttrSetButNotChanged(aNamespaceID, aName, value, aNotify);
|
||
}
|
||
|
||
nsAttrValue attrValue;
|
||
nsAttrValue* preparsedAttrValue;
|
||
if (aNamespaceID == kNameSpaceID_None && aName == nsGkAtoms::_class) {
|
||
attrValue.ParseAtomArray(aValue);
|
||
value.ResetToAttrValue(attrValue);
|
||
preparsedAttrValue = &attrValue;
|
||
} else {
|
||
preparsedAttrValue = nullptr;
|
||
}
|
||
|
||
if (aNotify) {
|
||
nsNodeUtils::AttributeWillChange(this, aNamespaceID, aName, modType,
|
||
preparsedAttrValue);
|
||
}
|
||
|
||
// Hold a script blocker while calling ParseAttribute since that can call
|
||
// out to id-observers
|
||
nsIDocument* document = GetComposedDoc();
|
||
mozAutoDocUpdate updateBatch(document, aNotify);
|
||
|
||
nsresult rv = BeforeSetAttr(aNamespaceID, aName, &value, aNotify);
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
|
||
if (!preparsedAttrValue &&
|
||
!ParseAttribute(aNamespaceID, aName, aValue, aSubjectPrincipal,
|
||
attrValue)) {
|
||
attrValue.SetTo(aValue);
|
||
}
|
||
|
||
PreIdMaybeChange(aNamespaceID, aName, &value);
|
||
|
||
return SetAttrAndNotify(aNamespaceID, aName, aPrefix,
|
||
oldValueSet ? &oldValue : nullptr,
|
||
attrValue, aSubjectPrincipal, modType,
|
||
hasListeners, aNotify,
|
||
kCallAfterSetAttr, document, updateBatch);
|
||
}
|
||
|
||
nsresult
|
||
Element::SetParsedAttr(int32_t aNamespaceID, nsAtom* aName,
|
||
nsAtom* aPrefix, nsAttrValue& aParsedValue,
|
||
bool aNotify)
|
||
{
|
||
// Keep this in sync with SetAttr and SetSingleClassFromParser above
|
||
|
||
NS_ENSURE_ARG_POINTER(aName);
|
||
NS_ASSERTION(aNamespaceID != kNameSpaceID_Unknown,
|
||
"Don't call SetAttr with unknown namespace");
|
||
|
||
uint8_t modType;
|
||
bool hasListeners;
|
||
nsAttrValueOrString value(aParsedValue);
|
||
nsAttrValue oldValue;
|
||
bool oldValueSet;
|
||
|
||
if (OnlyNotifySameValueSet(aNamespaceID, aName, aPrefix, value, aNotify,
|
||
oldValue, &modType, &hasListeners, &oldValueSet)) {
|
||
return OnAttrSetButNotChanged(aNamespaceID, aName, value, aNotify);
|
||
}
|
||
|
||
if (aNotify) {
|
||
nsNodeUtils::AttributeWillChange(this, aNamespaceID, aName, modType,
|
||
&aParsedValue);
|
||
}
|
||
|
||
nsresult rv = BeforeSetAttr(aNamespaceID, aName, &value, aNotify);
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
|
||
PreIdMaybeChange(aNamespaceID, aName, &value);
|
||
|
||
nsIDocument* document = GetComposedDoc();
|
||
mozAutoDocUpdate updateBatch(document, aNotify);
|
||
return SetAttrAndNotify(aNamespaceID, aName, aPrefix,
|
||
oldValueSet ? &oldValue : nullptr,
|
||
aParsedValue, nullptr, modType, hasListeners, aNotify,
|
||
kCallAfterSetAttr, document, updateBatch);
|
||
}
|
||
|
||
nsresult
|
||
Element::SetAttrAndNotify(int32_t aNamespaceID,
|
||
nsAtom* aName,
|
||
nsAtom* aPrefix,
|
||
const nsAttrValue* aOldValue,
|
||
nsAttrValue& aParsedValue,
|
||
nsIPrincipal* aSubjectPrincipal,
|
||
uint8_t aModType,
|
||
bool aFireMutation,
|
||
bool aNotify,
|
||
bool aCallAfterSetAttr,
|
||
nsIDocument* aComposedDocument,
|
||
const mozAutoDocUpdate&)
|
||
{
|
||
nsresult rv;
|
||
nsMutationGuard::DidMutate();
|
||
|
||
// Copy aParsedValue for later use since it will be lost when we call
|
||
// SetAndSwapMappedAttr below
|
||
nsAttrValue valueForAfterSetAttr;
|
||
if (aCallAfterSetAttr || GetCustomElementData()) {
|
||
valueForAfterSetAttr.SetTo(aParsedValue);
|
||
}
|
||
|
||
bool hadValidDir = false;
|
||
bool hadDirAuto = false;
|
||
bool oldValueSet;
|
||
|
||
if (aNamespaceID == kNameSpaceID_None) {
|
||
if (aName == nsGkAtoms::dir) {
|
||
hadValidDir = HasValidDir() || IsHTMLElement(nsGkAtoms::bdi);
|
||
hadDirAuto = HasDirAuto(); // already takes bdi into account
|
||
}
|
||
|
||
// XXXbz Perhaps we should push up the attribute mapping function
|
||
// stuff to Element?
|
||
if (!IsAttributeMapped(aName) ||
|
||
!SetAndSwapMappedAttribute(aName, aParsedValue, &oldValueSet, &rv)) {
|
||
rv = mAttrs.SetAndSwapAttr(aName, aParsedValue, &oldValueSet);
|
||
}
|
||
}
|
||
else {
|
||
RefPtr<mozilla::dom::NodeInfo> ni;
|
||
ni = mNodeInfo->NodeInfoManager()->GetNodeInfo(aName, aPrefix,
|
||
aNamespaceID,
|
||
ATTRIBUTE_NODE);
|
||
|
||
rv = mAttrs.SetAndSwapAttr(ni, aParsedValue, &oldValueSet);
|
||
}
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
|
||
PostIdMaybeChange(aNamespaceID, aName, &valueForAfterSetAttr);
|
||
|
||
// If the old value owns its own data, we know it is OK to keep using it.
|
||
// oldValue will be null if there was no previously set value
|
||
const nsAttrValue* oldValue;
|
||
if (aParsedValue.StoresOwnData()) {
|
||
if (oldValueSet) {
|
||
oldValue = &aParsedValue;
|
||
} else {
|
||
oldValue = nullptr;
|
||
}
|
||
} else {
|
||
// No need to conditionally assign null here. If there was no previously
|
||
// set value for the attribute, aOldValue will already be null.
|
||
oldValue = aOldValue;
|
||
}
|
||
|
||
if (aComposedDocument) {
|
||
RefPtr<nsXBLBinding> binding = GetXBLBinding();
|
||
if (binding) {
|
||
binding->AttributeChanged(aName, aNamespaceID, false, aNotify);
|
||
}
|
||
}
|
||
|
||
if (CustomElementRegistry::IsCustomElementEnabled(OwnerDoc())) {
|
||
CustomElementDefinition* definition = GetCustomElementDefinition();
|
||
// Only custom element which is in `custom` state could get the
|
||
// CustomElementDefinition.
|
||
if (definition && definition->IsInObservedAttributeList(aName)) {
|
||
RefPtr<nsAtom> oldValueAtom;
|
||
if (oldValue) {
|
||
oldValueAtom = oldValue->GetAsAtom();
|
||
} else {
|
||
// If there is no old value, get the value of the uninitialized
|
||
// attribute that was swapped with aParsedValue.
|
||
oldValueAtom = aParsedValue.GetAsAtom();
|
||
}
|
||
RefPtr<nsAtom> newValueAtom = valueForAfterSetAttr.GetAsAtom();
|
||
nsAutoString ns;
|
||
nsContentUtils::NameSpaceManager()->GetNameSpaceURI(aNamespaceID, ns);
|
||
|
||
LifecycleCallbackArgs args = {
|
||
nsDependentAtomString(aName),
|
||
aModType == MutationEvent_Binding::ADDITION ?
|
||
VoidString() : nsDependentAtomString(oldValueAtom),
|
||
nsDependentAtomString(newValueAtom),
|
||
(ns.IsEmpty() ? VoidString() : ns)
|
||
};
|
||
|
||
nsContentUtils::EnqueueLifecycleCallback(nsIDocument::eAttributeChanged,
|
||
this, &args, nullptr, definition);
|
||
}
|
||
}
|
||
|
||
if (aCallAfterSetAttr) {
|
||
rv = AfterSetAttr(aNamespaceID, aName, &valueForAfterSetAttr, oldValue,
|
||
aSubjectPrincipal, aNotify);
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
|
||
if (aNamespaceID == kNameSpaceID_None && aName == nsGkAtoms::dir) {
|
||
OnSetDirAttr(this, &valueForAfterSetAttr,
|
||
hadValidDir, hadDirAuto, aNotify);
|
||
}
|
||
}
|
||
|
||
UpdateState(aNotify);
|
||
|
||
if (aNotify) {
|
||
// Don't pass aOldValue to AttributeChanged since it may not be reliable.
|
||
// Callers only compute aOldValue under certain conditions which may not
|
||
// be triggered by all nsIMutationObservers.
|
||
nsNodeUtils::AttributeChanged(this, aNamespaceID, aName, aModType,
|
||
aParsedValue.StoresOwnData() ? &aParsedValue : nullptr);
|
||
}
|
||
|
||
if (aFireMutation) {
|
||
InternalMutationEvent mutation(true, eLegacyAttrModified);
|
||
|
||
nsAutoString ns;
|
||
nsContentUtils::NameSpaceManager()->GetNameSpaceURI(aNamespaceID, ns);
|
||
Attr* attrNode =
|
||
GetAttributeNodeNSInternal(ns, nsDependentAtomString(aName));
|
||
mutation.mRelatedNode = attrNode;
|
||
|
||
mutation.mAttrName = aName;
|
||
nsAutoString newValue;
|
||
GetAttr(aNamespaceID, aName, newValue);
|
||
if (!newValue.IsEmpty()) {
|
||
mutation.mNewAttrValue = NS_Atomize(newValue);
|
||
}
|
||
if (oldValue && !oldValue->IsEmptyString()) {
|
||
mutation.mPrevAttrValue = oldValue->GetAsAtom();
|
||
}
|
||
mutation.mAttrChange = aModType;
|
||
|
||
mozAutoSubtreeModified subtree(OwnerDoc(), this);
|
||
(new AsyncEventDispatcher(this, mutation))->RunDOMEventWhenSafe();
|
||
}
|
||
|
||
return NS_OK;
|
||
}
|
||
|
||
bool
|
||
Element::ParseAttribute(int32_t aNamespaceID,
|
||
nsAtom* aAttribute,
|
||
const nsAString& aValue,
|
||
nsIPrincipal* aMaybeScriptedPrincipal,
|
||
nsAttrValue& aResult)
|
||
{
|
||
if (aAttribute == nsGkAtoms::lang) {
|
||
aResult.ParseAtom(aValue);
|
||
return true;
|
||
}
|
||
|
||
if (aNamespaceID == kNameSpaceID_None) {
|
||
MOZ_ASSERT(aAttribute != nsGkAtoms::_class,
|
||
"The class attribute should be preparsed and therefore should "
|
||
"never be passed to Element::ParseAttribute");
|
||
if (aAttribute == nsGkAtoms::id) {
|
||
// Store id as an atom. id="" means that the element has no id,
|
||
// not that it has an emptystring as the id.
|
||
if (aValue.IsEmpty()) {
|
||
return false;
|
||
}
|
||
aResult.ParseAtom(aValue);
|
||
return true;
|
||
}
|
||
}
|
||
|
||
return false;
|
||
}
|
||
|
||
bool
|
||
Element::SetAndSwapMappedAttribute(nsAtom* aName,
|
||
nsAttrValue& aValue,
|
||
bool* aValueWasSet,
|
||
nsresult* aRetval)
|
||
{
|
||
*aRetval = NS_OK;
|
||
return false;
|
||
}
|
||
|
||
nsresult
|
||
Element::BeforeSetAttr(int32_t aNamespaceID, nsAtom* aName,
|
||
const nsAttrValueOrString* aValue, bool aNotify)
|
||
{
|
||
if (aNamespaceID == kNameSpaceID_None) {
|
||
if (aName == nsGkAtoms::_class) {
|
||
if (aValue) {
|
||
// Note: This flag is asymmetrical. It is never unset and isn't exact.
|
||
// If it is ever made to be exact, we probably need to handle this
|
||
// similarly to how ids are handled in PreIdMaybeChange and
|
||
// PostIdMaybeChange.
|
||
// Note that SetSingleClassFromParser inlines BeforeSetAttr and
|
||
// calls SetMayHaveClass directly. Making a subclass take action
|
||
// on the class attribute in a BeforeSetAttr override would
|
||
// require revising SetSingleClassFromParser.
|
||
SetMayHaveClass();
|
||
}
|
||
}
|
||
}
|
||
|
||
return NS_OK;
|
||
}
|
||
|
||
void
|
||
Element::PreIdMaybeChange(int32_t aNamespaceID, nsAtom* aName,
|
||
const nsAttrValueOrString* aValue)
|
||
{
|
||
if (aNamespaceID != kNameSpaceID_None || aName != nsGkAtoms::id) {
|
||
return;
|
||
}
|
||
RemoveFromIdTable();
|
||
}
|
||
|
||
void
|
||
Element::PostIdMaybeChange(int32_t aNamespaceID, nsAtom* aName,
|
||
const nsAttrValue* aValue)
|
||
{
|
||
if (aNamespaceID != kNameSpaceID_None || aName != nsGkAtoms::id) {
|
||
return;
|
||
}
|
||
|
||
// id="" means that the element has no id, not that it has an empty
|
||
// string as the id.
|
||
if (aValue && !aValue->IsEmptyString()) {
|
||
SetHasID();
|
||
AddToIdTable(aValue->GetAtomValue());
|
||
} else {
|
||
ClearHasID();
|
||
}
|
||
}
|
||
|
||
nsresult
|
||
Element::OnAttrSetButNotChanged(int32_t aNamespaceID, nsAtom* aName,
|
||
const nsAttrValueOrString& aValue,
|
||
bool aNotify)
|
||
{
|
||
if (CustomElementRegistry::IsCustomElementEnabled(OwnerDoc())) {
|
||
// Only custom element which is in `custom` state could get the
|
||
// CustomElementDefinition.
|
||
CustomElementDefinition* definition = GetCustomElementDefinition();
|
||
if (definition && definition->IsInObservedAttributeList(aName)) {
|
||
nsAutoString ns;
|
||
nsContentUtils::NameSpaceManager()->GetNameSpaceURI(aNamespaceID, ns);
|
||
|
||
nsAutoString value(aValue.String());
|
||
LifecycleCallbackArgs args = {
|
||
nsDependentAtomString(aName),
|
||
value,
|
||
value,
|
||
(ns.IsEmpty() ? VoidString() : ns)
|
||
};
|
||
|
||
nsContentUtils::EnqueueLifecycleCallback(nsIDocument::eAttributeChanged,
|
||
this, &args, nullptr, definition);
|
||
}
|
||
}
|
||
|
||
return NS_OK;
|
||
}
|
||
|
||
EventListenerManager*
|
||
Element::GetEventListenerManagerForAttr(nsAtom* aAttrName,
|
||
bool* aDefer)
|
||
{
|
||
*aDefer = true;
|
||
return GetOrCreateListenerManager();
|
||
}
|
||
|
||
bool
|
||
Element::GetAttr(int32_t aNameSpaceID, nsAtom* aName,
|
||
nsAString& aResult) const
|
||
{
|
||
DOMString str;
|
||
bool haveAttr = GetAttr(aNameSpaceID, aName, str);
|
||
str.ToString(aResult);
|
||
return haveAttr;
|
||
}
|
||
|
||
int32_t
|
||
Element::FindAttrValueIn(int32_t aNameSpaceID,
|
||
nsAtom* 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 = mAttrs.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, nsAtom* aName,
|
||
bool aNotify)
|
||
{
|
||
NS_ASSERTION(nullptr != aName, "must have attribute name");
|
||
|
||
int32_t index = mAttrs.IndexOfAttr(aName, aNameSpaceID);
|
||
if (index < 0) {
|
||
return NS_OK;
|
||
}
|
||
|
||
nsIDocument *document = GetComposedDoc();
|
||
mozAutoDocUpdate updateBatch(document, aNotify);
|
||
|
||
if (aNotify) {
|
||
nsNodeUtils::AttributeWillChange(this, aNameSpaceID, aName,
|
||
MutationEvent_Binding::REMOVAL,
|
||
nullptr);
|
||
}
|
||
|
||
nsresult rv = BeforeSetAttr(aNameSpaceID, aName, nullptr, aNotify);
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
|
||
bool hasMutationListeners = aNotify &&
|
||
nsContentUtils::HasMutationListeners(this,
|
||
NS_EVENT_BITS_MUTATION_ATTRMODIFIED,
|
||
this);
|
||
|
||
PreIdMaybeChange(aNameSpaceID, aName, nullptr);
|
||
|
||
// Grab the attr node if needed before we remove it from the attr map
|
||
RefPtr<Attr> attrNode;
|
||
if (hasMutationListeners) {
|
||
nsAutoString ns;
|
||
nsContentUtils::NameSpaceManager()->GetNameSpaceURI(aNameSpaceID, ns);
|
||
attrNode = GetAttributeNodeNSInternal(ns, nsDependentAtomString(aName));
|
||
}
|
||
|
||
// Clear the attribute out from attribute map.
|
||
nsDOMSlots *slots = GetExistingDOMSlots();
|
||
if (slots && slots->mAttributeMap) {
|
||
slots->mAttributeMap->DropAttribute(aNameSpaceID, aName);
|
||
}
|
||
|
||
// The id-handling code, and in the future possibly other code, need to
|
||
// react to unexpected attribute changes.
|
||
nsMutationGuard::DidMutate();
|
||
|
||
bool hadValidDir = false;
|
||
bool hadDirAuto = false;
|
||
|
||
if (aNameSpaceID == kNameSpaceID_None && aName == nsGkAtoms::dir) {
|
||
hadValidDir = HasValidDir() || IsHTMLElement(nsGkAtoms::bdi);
|
||
hadDirAuto = HasDirAuto(); // already takes bdi into account
|
||
}
|
||
|
||
nsAttrValue oldValue;
|
||
rv = mAttrs.RemoveAttrAt(index, oldValue);
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
|
||
PostIdMaybeChange(aNameSpaceID, aName, nullptr);
|
||
|
||
if (document) {
|
||
RefPtr<nsXBLBinding> binding = GetXBLBinding();
|
||
if (binding) {
|
||
binding->AttributeChanged(aName, aNameSpaceID, true, aNotify);
|
||
}
|
||
}
|
||
|
||
if (CustomElementRegistry::IsCustomElementEnabled(OwnerDoc())) {
|
||
CustomElementDefinition* definition = GetCustomElementDefinition();
|
||
// Only custom element which is in `custom` state could get the
|
||
// CustomElementDefinition.
|
||
if (definition && definition->IsInObservedAttributeList(aName)) {
|
||
nsAutoString ns;
|
||
nsContentUtils::NameSpaceManager()->GetNameSpaceURI(aNameSpaceID, ns);
|
||
|
||
RefPtr<nsAtom> oldValueAtom = oldValue.GetAsAtom();
|
||
LifecycleCallbackArgs args = {
|
||
nsDependentAtomString(aName),
|
||
nsDependentAtomString(oldValueAtom),
|
||
VoidString(),
|
||
(ns.IsEmpty() ? VoidString() : ns)
|
||
};
|
||
|
||
nsContentUtils::EnqueueLifecycleCallback(nsIDocument::eAttributeChanged,
|
||
this, &args, nullptr, definition);
|
||
}
|
||
}
|
||
|
||
rv = AfterSetAttr(aNameSpaceID, aName, nullptr, &oldValue, nullptr, aNotify);
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
|
||
UpdateState(aNotify);
|
||
|
||
if (aNotify) {
|
||
// We can always pass oldValue here since there is no new value which could
|
||
// have corrupted it.
|
||
nsNodeUtils::AttributeChanged(this, aNameSpaceID, aName,
|
||
MutationEvent_Binding::REMOVAL, &oldValue);
|
||
}
|
||
|
||
if (aNameSpaceID == kNameSpaceID_None && aName == nsGkAtoms::dir) {
|
||
OnSetDirAttr(this, nullptr, hadValidDir, hadDirAuto, aNotify);
|
||
}
|
||
|
||
if (hasMutationListeners) {
|
||
InternalMutationEvent mutation(true, eLegacyAttrModified);
|
||
|
||
mutation.mRelatedNode = attrNode;
|
||
mutation.mAttrName = aName;
|
||
|
||
nsAutoString value;
|
||
oldValue.ToString(value);
|
||
if (!value.IsEmpty())
|
||
mutation.mPrevAttrValue = NS_Atomize(value);
|
||
mutation.mAttrChange = MutationEvent_Binding::REMOVAL;
|
||
|
||
mozAutoSubtreeModified subtree(OwnerDoc(), this);
|
||
(new AsyncEventDispatcher(this, mutation))->RunDOMEventWhenSafe();
|
||
}
|
||
|
||
return NS_OK;
|
||
}
|
||
|
||
void
|
||
Element::DescribeAttribute(uint32_t index, nsAString& aOutDescription) const
|
||
{
|
||
// name
|
||
mAttrs.AttrNameAt(index)->GetQualifiedName(aOutDescription);
|
||
|
||
// value
|
||
aOutDescription.AppendLiteral("=\"");
|
||
nsAutoString value;
|
||
mAttrs.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 = mAttrs.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()) {
|
||
const LinkedList<nsRange>* ranges = GetExistingCommonAncestorRanges();
|
||
int32_t count = 0;
|
||
if (ranges) {
|
||
// Can't use range-based iteration on a const LinkedList, unfortunately.
|
||
for (const nsRange* r = ranges->getFirst(); r; r = r->getNext()) {
|
||
++count;
|
||
}
|
||
}
|
||
fprintf(out, " ranges:%d", count);
|
||
}
|
||
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();
|
||
nsINodeList* anonymousChildren =
|
||
bindingManager->GetAnonymousNodesFor(nonConstThis);
|
||
|
||
if (anonymousChildren) {
|
||
uint32_t length = anonymousChildren->Length();
|
||
|
||
for (indent = aIndent; --indent >= 0; ) fputs(" ", out);
|
||
fputs("anonymous-children<\n", out);
|
||
|
||
for (uint32_t i = 0; i < length; ++i) {
|
||
nsIContent* child = anonymousChildren->Item(i);
|
||
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 = mAttrs.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);
|
||
}
|
||
|
||
void
|
||
Element::GetEventTargetParentForLinks(EventChainPreVisitor& aVisitor)
|
||
{
|
||
// Optimisation: return early if this event doesn't interest us.
|
||
// IMPORTANT: this switch and the switch below it must be kept in sync!
|
||
switch (aVisitor.mEvent->mMessage) {
|
||
case eMouseOver:
|
||
case eFocus:
|
||
case eMouseOut:
|
||
case eBlur:
|
||
break;
|
||
default:
|
||
return;
|
||
}
|
||
|
||
// Make sure we meet the preconditions before continuing
|
||
nsCOMPtr<nsIURI> absURI;
|
||
if (!CheckHandleEventForLinksPrecondition(aVisitor, getter_AddRefs(absURI))) {
|
||
return;
|
||
}
|
||
|
||
// We do the status bar updates in GetEventTargetParent so that the status bar
|
||
// gets updated even if the event is consumed before we have a chance to set
|
||
// it.
|
||
switch (aVisitor.mEvent->mMessage) {
|
||
// Set the status bar similarly for mouseover and focus
|
||
case eMouseOver:
|
||
aVisitor.mEventStatus = nsEventStatus_eConsumeNoDefault;
|
||
MOZ_FALLTHROUGH;
|
||
case eFocus: {
|
||
InternalFocusEvent* focusEvent = aVisitor.mEvent->AsFocusEvent();
|
||
if (!focusEvent || !focusEvent->mIsRefocus) {
|
||
nsAutoString target;
|
||
GetLinkTarget(target);
|
||
nsContentUtils::TriggerLink(this, aVisitor.mPresContext, absURI, target,
|
||
/* click */ false, /* isTrusted */ 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:
|
||
{
|
||
nsresult 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
|
||
MOZ_ASSERT_UNREACHABLE("switch statements not in sync");
|
||
}
|
||
}
|
||
|
||
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;
|
||
RefPtr<Element> kungFuDeathGrip(this);
|
||
fm->SetFocus(kungFuDeathGrip, nsIFocusManager::FLAG_BYMOUSE |
|
||
nsIFocusManager::FLAG_NOSCROLL);
|
||
}
|
||
|
||
EventStateManager::SetActiveManager(
|
||
aVisitor.mPresContext->EventStateManager(), this);
|
||
|
||
// OK, we're pretty sure we're going to load, so warm up a speculative
|
||
// connection to be sure we have one ready when we open the channel.
|
||
nsCOMPtr<nsISpeculativeConnect> sc =
|
||
do_QueryInterface(nsContentUtils::GetIOService());
|
||
nsCOMPtr<nsIInterfaceRequestor> ir = do_QueryInterface(handler);
|
||
sc->SpeculativeConnect2(absURI, NodePrincipal(), ir);
|
||
}
|
||
}
|
||
}
|
||
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,
|
||
/* click */ 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
|
||
MOZ_ASSERT_UNREACHABLE("switch statements not in sync");
|
||
return NS_ERROR_UNEXPECTED;
|
||
}
|
||
|
||
return rv;
|
||
}
|
||
|
||
void
|
||
Element::GetLinkTarget(nsAString& aTarget)
|
||
{
|
||
aTarget.Truncate();
|
||
}
|
||
|
||
static void
|
||
nsDOMTokenListPropertyDestructor(void *aObject, nsAtom *aProperty,
|
||
void *aPropertyValue, void *aData)
|
||
{
|
||
nsDOMTokenList* list =
|
||
static_cast<nsDOMTokenList*>(aPropertyValue);
|
||
NS_RELEASE(list);
|
||
}
|
||
|
||
static nsStaticAtom* const sPropertiesToTraverseAndUnlink[] =
|
||
{
|
||
nsGkAtoms::sandbox,
|
||
nsGkAtoms::sizes,
|
||
nsGkAtoms::dirAutoSetBy,
|
||
nullptr
|
||
};
|
||
|
||
// static
|
||
nsStaticAtom* const*
|
||
Element::HTMLSVGPropertiesToTraverseAndUnlink()
|
||
{
|
||
return sPropertiesToTraverseAndUnlink;
|
||
}
|
||
|
||
nsDOMTokenList*
|
||
Element::GetTokenList(nsAtom* aAtom,
|
||
const DOMTokenListSupportedTokenArray aSupportedTokens)
|
||
{
|
||
#ifdef DEBUG
|
||
const nsStaticAtom* const* 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)
|
||
{
|
||
const RawServoSelectorList* list = ParseSelectorList(aSelector, aResult);
|
||
if (!list) {
|
||
return nullptr;
|
||
}
|
||
|
||
return const_cast<Element*>(Servo_SelectorList_Closest(this, list));
|
||
}
|
||
|
||
bool
|
||
Element::Matches(const nsAString& aSelector, ErrorResult& aResult)
|
||
{
|
||
const RawServoSelectorList* list = ParseSelectorList(aSelector, aResult);
|
||
if (!list) {
|
||
return false;
|
||
}
|
||
return Servo_SelectorList_Matches(this, list);
|
||
}
|
||
|
||
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(CallerType aCallerType)
|
||
{
|
||
if (!nsContentUtils::IsRequestFullscreenAllowed(aCallerType)) {
|
||
return "FullscreenDeniedNotInputDriven";
|
||
}
|
||
|
||
return nullptr;
|
||
}
|
||
|
||
already_AddRefed<Promise>
|
||
Element::RequestFullscreen(CallerType aCallerType, ErrorResult& aRv)
|
||
{
|
||
auto request = FullscreenRequest::Create(this, aCallerType, aRv);
|
||
RefPtr<Promise> promise = request->GetPromise();
|
||
|
||
if (!FeaturePolicyUtils::IsFeatureAllowed(OwnerDoc(),
|
||
NS_LITERAL_STRING("fullscreen"))) {
|
||
request->Reject("FullscreenDeniedFeaturePolicy");
|
||
return promise.forget();
|
||
}
|
||
|
||
// Only grant fullscreen 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 fullscreen from being abused similar to the popups of old,
|
||
// and it also makes it harder for bad guys' script to go fullscreen 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(aCallerType)) {
|
||
request->Reject(error);
|
||
} else {
|
||
OwnerDoc()->AsyncRequestFullscreen(std::move(request));
|
||
}
|
||
return promise.forget();
|
||
}
|
||
|
||
void
|
||
Element::RequestPointerLock(CallerType aCallerType)
|
||
{
|
||
OwnerDoc()->RequestPointerLock(this, aCallerType);
|
||
}
|
||
|
||
already_AddRefed<Flex>
|
||
Element::GetAsFlexContainer()
|
||
{
|
||
nsIFrame* frame = GetPrimaryFrame();
|
||
|
||
// We need the flex frame to compute additional info, and use
|
||
// that annotated version of the frame.
|
||
nsFlexContainerFrame* flexFrame =
|
||
nsFlexContainerFrame::GetFlexFrameWithComputedInfo(frame);
|
||
|
||
if (flexFrame) {
|
||
RefPtr<Flex> flex = new Flex(this, flexFrame);
|
||
return flex.forget();
|
||
}
|
||
return nullptr;
|
||
}
|
||
|
||
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<DOMMatrixReadOnly>
|
||
Element::GetTransformToAncestor(Element& aAncestor)
|
||
{
|
||
nsIFrame* primaryFrame = GetPrimaryFrame();
|
||
nsIFrame* ancestorFrame = aAncestor.GetPrimaryFrame();
|
||
|
||
Matrix4x4 transform;
|
||
if (primaryFrame) {
|
||
// If aAncestor is not actually an ancestor of this (including nullptr),
|
||
// then the call to GetTransformToAncestor will return the transform
|
||
// all the way up through the parent chain.
|
||
transform = nsLayoutUtils::GetTransformToAncestor(primaryFrame,
|
||
ancestorFrame, nsIFrame::IN_CSS_UNITS).GetMatrix();
|
||
}
|
||
|
||
DOMMatrixReadOnly* matrix = new DOMMatrix(this, transform);
|
||
RefPtr<DOMMatrixReadOnly> result(matrix);
|
||
return result.forget();
|
||
}
|
||
|
||
already_AddRefed<DOMMatrixReadOnly>
|
||
Element::GetTransformToParent()
|
||
{
|
||
nsIFrame* primaryFrame = GetPrimaryFrame();
|
||
|
||
Matrix4x4 transform;
|
||
if (primaryFrame) {
|
||
nsIFrame* parentFrame = primaryFrame->GetParent();
|
||
transform = nsLayoutUtils::GetTransformToAncestor(primaryFrame,
|
||
parentFrame, nsIFrame::IN_CSS_UNITS).GetMatrix();
|
||
}
|
||
|
||
DOMMatrixReadOnly* matrix = new DOMMatrix(this, transform);
|
||
RefPtr<DOMMatrixReadOnly> result(matrix);
|
||
return result.forget();
|
||
}
|
||
|
||
already_AddRefed<DOMMatrixReadOnly>
|
||
Element::GetTransformToViewport()
|
||
{
|
||
nsIFrame* primaryFrame = GetPrimaryFrame();
|
||
Matrix4x4 transform;
|
||
if (primaryFrame) {
|
||
transform = nsLayoutUtils::GetTransformToAncestor(primaryFrame,
|
||
nsLayoutUtils::GetDisplayRootFrame(primaryFrame), nsIFrame::IN_CSS_UNITS).GetMatrix();
|
||
}
|
||
|
||
DOMMatrixReadOnly* matrix = new DOMMatrix(this, transform);
|
||
RefPtr<DOMMatrixReadOnly> result(matrix);
|
||
return result.forget();
|
||
}
|
||
|
||
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());
|
||
|
||
// KeyframeEffect constructor doesn't follow the standard Xray calling
|
||
// convention and needs to be called in caller's compartment.
|
||
// This should match to RunConstructorInCallerCompartment attribute in
|
||
// KeyframeEffect.webidl.
|
||
RefPtr<KeyframeEffect> effect =
|
||
KeyframeEffect::Constructor(global, aTarget, aKeyframes, aOptions,
|
||
aError);
|
||
if (aError.Failed()) {
|
||
return nullptr;
|
||
}
|
||
|
||
// Animation constructor follows the standard Xray calling convention and
|
||
// needs to be called in the target element's realm.
|
||
Maybe<JSAutoRealm> ar;
|
||
if (js::GetContextCompartment(aContext) !=
|
||
js::GetObjectCompartment(ownerGlobal->GetGlobalJSObject())) {
|
||
ar.emplace(aContext, ownerGlobal->GetGlobalJSObject());
|
||
}
|
||
|
||
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) {
|
||
// We don't need to explicitly flush throttled animations here, since
|
||
// updating the animation style of elements will never affect the set of
|
||
// running animations and it's only the set of running animations that is
|
||
// important here.
|
||
doc->FlushPendingNotifications(
|
||
ChangesToFlush(FlushType::Style, false /* flush animations */));
|
||
}
|
||
|
||
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 (KeyframeEffect* 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);
|
||
}
|
||
}
|
||
|
||
void
|
||
Element::GetInnerHTML(nsAString& aInnerHTML, OOMReporter& aError)
|
||
{
|
||
GetMarkup(false, aInnerHTML);
|
||
}
|
||
|
||
void
|
||
Element::SetInnerHTML(const nsAString& aInnerHTML, nsIPrincipal* aSubjectPrincipal, 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() == DOCUMENT_NODE) {
|
||
aError.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);
|
||
return;
|
||
}
|
||
|
||
if (OwnerDoc()->IsHTMLDocument()) {
|
||
nsAtom* localName;
|
||
int32_t namespaceID;
|
||
if (parent->IsElement()) {
|
||
localName = parent->NodeInfo()->NameAtom();
|
||
namespaceID = parent->NodeInfo()->NamespaceID();
|
||
} else {
|
||
NS_ASSERTION(parent->NodeType() == 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() == 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,
|
||
ELEMENT_NODE);
|
||
context = NS_NewHTMLBodyElement(info.forget(), FROM_PARSER_FRAGMENT);
|
||
}
|
||
|
||
RefPtr<DocumentFragment> fragment =
|
||
nsContentUtils::CreateContextualFragment(context, aOuterHTML, true, aError);
|
||
if (aError.Failed()) {
|
||
return;
|
||
}
|
||
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, 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();
|
||
nsAtom* 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
|
||
RefPtr<DocumentFragment> fragment =
|
||
nsContentUtils::CreateContextualFragment(destination, aText, true, aError);
|
||
if (aError.Failed()) {
|
||
return;
|
||
}
|
||
|
||
// 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);
|
||
}
|
||
|
||
TextEditor*
|
||
Element::GetTextEditorInternal()
|
||
{
|
||
nsCOMPtr<nsITextControlElement> textCtrl = do_QueryInterface(this);
|
||
return textCtrl ? textCtrl->GetTextEditor() : nullptr;
|
||
}
|
||
|
||
nsresult
|
||
Element::SetBoolAttr(nsAtom* aAttr, bool aValue)
|
||
{
|
||
if (aValue) {
|
||
return SetAttr(kNameSpaceID_None, aAttr, EmptyString(), true);
|
||
}
|
||
|
||
return UnsetAttr(kNameSpaceID_None, aAttr, true);
|
||
}
|
||
|
||
void
|
||
Element::GetEnumAttr(nsAtom* aAttr,
|
||
const char* aDefault,
|
||
nsAString& aResult) const
|
||
{
|
||
GetEnumAttr(aAttr, aDefault, aDefault, aResult);
|
||
}
|
||
|
||
void
|
||
Element::GetEnumAttr(nsAtom* aAttr,
|
||
const char* aDefaultMissing,
|
||
const char* aDefaultInvalid,
|
||
nsAString& aResult) const
|
||
{
|
||
const nsAttrValue* attrVal = mAttrs.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(nsAtom* 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 (IsHTMLElement()) {
|
||
const nsAttrValue* referrerValue = GetParsedAttr(nsGkAtoms::referrerpolicy);
|
||
return ReferrerPolicyFromAttr(referrerValue);
|
||
}
|
||
return net::RP_Unset;
|
||
}
|
||
|
||
net::ReferrerPolicy
|
||
Element::ReferrerPolicyFromAttr(const nsAttrValue* aValue)
|
||
{
|
||
if (aValue && aValue->Type() == nsAttrValue::eEnum) {
|
||
return net::ReferrerPolicy(aValue->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;
|
||
}
|
||
|
||
enum nsPreviousIntersectionThreshold {
|
||
eUninitialized = -2,
|
||
eNonIntersecting = -1
|
||
};
|
||
|
||
static void
|
||
IntersectionObserverPropertyDtor(void* aObject, nsAtom* aPropertyName,
|
||
void* aPropertyValue, void* aData)
|
||
{
|
||
Element* element = static_cast<Element*>(aObject);
|
||
IntersectionObserverList* observers =
|
||
static_cast<IntersectionObserverList*>(aPropertyValue);
|
||
for (auto iter = observers->Iter(); !iter.Done(); iter.Next()) {
|
||
DOMIntersectionObserver* observer = iter.Key();
|
||
observer->UnlinkTarget(*element);
|
||
}
|
||
delete observers;
|
||
}
|
||
|
||
void
|
||
Element::RegisterIntersectionObserver(DOMIntersectionObserver* aObserver)
|
||
{
|
||
IntersectionObserverList* observers =
|
||
static_cast<IntersectionObserverList*>(
|
||
GetProperty(nsGkAtoms::intersectionobserverlist)
|
||
);
|
||
|
||
if (!observers) {
|
||
observers = new IntersectionObserverList();
|
||
observers->Put(aObserver, eUninitialized);
|
||
SetProperty(nsGkAtoms::intersectionobserverlist, observers,
|
||
IntersectionObserverPropertyDtor, true);
|
||
return;
|
||
}
|
||
|
||
observers->LookupForAdd(aObserver).OrInsert([]() {
|
||
// Value can be:
|
||
// -2: Makes sure next calculated threshold always differs, leading to a
|
||
// notification task being scheduled.
|
||
// -1: Non-intersecting.
|
||
// >= 0: Intersecting, valid index of aObserver->mThresholds.
|
||
return eUninitialized;
|
||
});
|
||
}
|
||
|
||
void
|
||
Element::UnregisterIntersectionObserver(DOMIntersectionObserver* aObserver)
|
||
{
|
||
IntersectionObserverList* observers =
|
||
static_cast<IntersectionObserverList*>(
|
||
GetProperty(nsGkAtoms::intersectionobserverlist)
|
||
);
|
||
if (observers) {
|
||
observers->Remove(aObserver);
|
||
}
|
||
}
|
||
|
||
void
|
||
Element::UnlinkIntersectionObservers()
|
||
{
|
||
IntersectionObserverList* observers =
|
||
static_cast<IntersectionObserverList*>(
|
||
GetProperty(nsGkAtoms::intersectionobserverlist)
|
||
);
|
||
if (!observers) {
|
||
return;
|
||
}
|
||
for (auto iter = observers->Iter(); !iter.Done(); iter.Next()) {
|
||
DOMIntersectionObserver* observer = iter.Key();
|
||
observer->UnlinkTarget(*this);
|
||
}
|
||
observers->Clear();
|
||
}
|
||
|
||
bool
|
||
Element::UpdateIntersectionObservation(DOMIntersectionObserver* aObserver, int32_t aThreshold)
|
||
{
|
||
IntersectionObserverList* observers =
|
||
static_cast<IntersectionObserverList*>(
|
||
GetProperty(nsGkAtoms::intersectionobserverlist)
|
||
);
|
||
if (!observers) {
|
||
return false;
|
||
}
|
||
bool updated = false;
|
||
if (auto entry = observers->Lookup(aObserver)) {
|
||
updated = entry.Data() != aThreshold;
|
||
entry.Data() = aThreshold;
|
||
}
|
||
return updated;
|
||
}
|
||
|
||
template<class T> void
|
||
Element::GetCustomInterface(nsGetterAddRefs<T> aResult)
|
||
{
|
||
nsCOMPtr<nsISupports> iface =
|
||
CustomElementRegistry::CallGetCustomInterface(this, NS_GET_TEMPLATE_IID(T));
|
||
if (iface) {
|
||
CallQueryInterface(iface, static_cast<T**>(aResult));
|
||
}
|
||
}
|
||
|
||
void
|
||
Element::ClearServoData(nsIDocument* aDoc) {
|
||
MOZ_ASSERT(aDoc);
|
||
if (HasServoData()) {
|
||
Servo_Element_ClearData(this);
|
||
} else {
|
||
UnsetFlags(kAllServoDescendantBits | NODE_NEEDS_FRAME);
|
||
}
|
||
// Since this element is losing its servo data, nothing under it may have
|
||
// servo data either, so we can forget restyles rooted at this element. This
|
||
// is necessary for correctness, since we invoke ClearServoData in various
|
||
// places where an element's flattened tree parent changes, and such a change
|
||
// may also make an element invalid to be used as a restyle root.
|
||
if (aDoc->GetServoRestyleRoot() == this) {
|
||
aDoc->ClearServoRestyleRoot();
|
||
}
|
||
}
|
||
|
||
void
|
||
Element::SetCustomElementData(CustomElementData* aData)
|
||
{
|
||
SetHasCustomElementData();
|
||
|
||
if (aData->mState != CustomElementData::State::eCustom) {
|
||
SetDefined(false);
|
||
}
|
||
|
||
nsExtendedDOMSlots *slots = ExtendedDOMSlots();
|
||
MOZ_ASSERT(!slots->mCustomElementData, "Custom element data may not be changed once set.");
|
||
#if DEBUG
|
||
// We assert only XUL usage, since web may pass whatever as 'is' value
|
||
if (NodeInfo()->NamespaceID() == kNameSpaceID_XUL) {
|
||
nsAtom* name = NodeInfo()->NameAtom();
|
||
nsAtom* type = aData->GetCustomElementType();
|
||
// Check to see if the tag name is a dashed name.
|
||
if (nsContentUtils::IsNameWithDash(name)) {
|
||
// Assert that a tag name with dashes is always an autonomous custom
|
||
// element.
|
||
MOZ_ASSERT(type == name);
|
||
} else {
|
||
// Could still be an autonomous custom element with a non-dashed tag name.
|
||
// Need the check below for sure.
|
||
if (type != name) {
|
||
// Assert that the name of the built-in custom element type is always
|
||
// a dashed name.
|
||
MOZ_ASSERT(nsContentUtils::IsNameWithDash(type));
|
||
}
|
||
}
|
||
}
|
||
#endif
|
||
slots->mCustomElementData = aData;
|
||
}
|
||
|
||
CustomElementDefinition*
|
||
Element::GetCustomElementDefinition() const
|
||
{
|
||
CustomElementData* data = GetCustomElementData();
|
||
if (!data) {
|
||
return nullptr;
|
||
}
|
||
|
||
return data->GetCustomElementDefinition();
|
||
}
|
||
|
||
void
|
||
Element::SetCustomElementDefinition(CustomElementDefinition* aDefinition)
|
||
{
|
||
CustomElementData* data = GetCustomElementData();
|
||
MOZ_ASSERT(data);
|
||
|
||
data->SetCustomElementDefinition(aDefinition);
|
||
}
|
||
|
||
MOZ_DEFINE_MALLOC_SIZE_OF(ServoElementMallocSizeOf)
|
||
MOZ_DEFINE_MALLOC_ENCLOSING_SIZE_OF(ServoElementMallocEnclosingSizeOf)
|
||
|
||
void
|
||
Element::AddSizeOfExcludingThis(nsWindowSizes& aSizes, size_t* aNodeSize) const
|
||
{
|
||
FragmentOrElement::AddSizeOfExcludingThis(aSizes, aNodeSize);
|
||
|
||
if (HasServoData()) {
|
||
// Measure the ElementData object itself.
|
||
aSizes.mLayoutElementDataObjects +=
|
||
aSizes.mState.mMallocSizeOf(mServoData.Get());
|
||
|
||
// Measure mServoData, excluding the ComputedValues. This measurement
|
||
// counts towards the element's size. We use ServoElementMallocSizeOf and
|
||
// ServoElementMallocEnclosingSizeOf rather than |aState.mMallocSizeOf| to
|
||
// better distinguish in DMD's output the memory measured within Servo
|
||
// code.
|
||
*aNodeSize +=
|
||
Servo_Element_SizeOfExcludingThisAndCVs(ServoElementMallocSizeOf,
|
||
ServoElementMallocEnclosingSizeOf,
|
||
&aSizes.mState.mSeenPtrs, this);
|
||
|
||
// Now measure just the ComputedValues (and style structs) under
|
||
// mServoData. This counts towards the relevant fields in |aSizes|.
|
||
RefPtr<ComputedStyle> sc;
|
||
if (Servo_Element_HasPrimaryComputedValues(this)) {
|
||
sc = Servo_Element_GetPrimaryComputedValues(this).Consume();
|
||
if (!aSizes.mState.HaveSeenPtr(sc.get())) {
|
||
sc->AddSizeOfIncludingThis(aSizes, &aSizes.mLayoutComputedValuesDom);
|
||
}
|
||
|
||
for (size_t i = 0; i < nsCSSPseudoElements::kEagerPseudoCount; i++) {
|
||
if (Servo_Element_HasPseudoComputedValues(this, i)) {
|
||
sc = Servo_Element_GetPseudoComputedValues(this, i).Consume();
|
||
if (!aSizes.mState.HaveSeenPtr(sc.get())) {
|
||
sc->AddSizeOfIncludingThis(aSizes,
|
||
&aSizes.mLayoutComputedValuesDom);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
#ifdef DEBUG
|
||
static bool
|
||
BitsArePropagated(const Element* aElement, uint32_t aBits, nsINode* aRestyleRoot)
|
||
{
|
||
const Element* curr = aElement;
|
||
while (curr) {
|
||
if (curr == aRestyleRoot) {
|
||
return true;
|
||
}
|
||
if (!curr->HasAllFlags(aBits)) {
|
||
return false;
|
||
}
|
||
nsINode* parentNode = curr->GetParentNode();
|
||
curr = curr->GetFlattenedTreeParentElementForStyle();
|
||
MOZ_ASSERT_IF(!curr,
|
||
parentNode == aElement->OwnerDoc() ||
|
||
parentNode == parentNode->OwnerDoc()->GetRootElement());
|
||
}
|
||
return true;
|
||
}
|
||
#endif
|
||
|
||
static inline void
|
||
AssertNoBitsPropagatedFrom(nsINode* aRoot)
|
||
{
|
||
#ifdef DEBUG
|
||
if (!aRoot || !aRoot->IsElement()) {
|
||
return;
|
||
}
|
||
|
||
auto* element = aRoot->GetFlattenedTreeParentElementForStyle();
|
||
while (element) {
|
||
MOZ_ASSERT(!element->HasAnyOfFlags(Element::kAllServoDescendantBits));
|
||
element = element->GetFlattenedTreeParentElementForStyle();
|
||
}
|
||
#endif
|
||
}
|
||
|
||
// Sets `aBits` on `aElement` and all of its flattened-tree ancestors up to and
|
||
// including aStopAt or the root element (whichever is encountered first), and
|
||
// as long as `aBitsToStopAt` isn't found anywhere in the chain.
|
||
static inline Element*
|
||
PropagateBits(Element* aElement, uint32_t aBits, nsINode* aStopAt, uint32_t aBitsToStopAt)
|
||
{
|
||
Element* curr = aElement;
|
||
while (curr && !curr->HasAllFlags(aBitsToStopAt)) {
|
||
curr->SetFlags(aBits);
|
||
if (curr == aStopAt) {
|
||
break;
|
||
}
|
||
curr = curr->GetFlattenedTreeParentElementForStyle();
|
||
}
|
||
|
||
if (aBitsToStopAt != aBits && curr) {
|
||
curr->SetFlags(aBits);
|
||
}
|
||
|
||
return curr;
|
||
}
|
||
|
||
// Notes that a given element is "dirty" with respect to the given descendants
|
||
// bit (which may be one of dirty descendants, dirty animation descendants, or
|
||
// need frame construction for descendants).
|
||
//
|
||
// This function operates on the dirty element itself, despite the fact that the
|
||
// bits are generally used to describe descendants. This allows restyle roots
|
||
// to be scoped as tightly as possible. On the first call to NoteDirtyElement
|
||
// since the last restyle, we don't set any descendant bits at all, and just set
|
||
// the element as the restyle root.
|
||
//
|
||
// Because the style traversal handles multiple tasks (styling, animation-ticking,
|
||
// and lazy frame construction), there are potentially three separate kinds of
|
||
// dirtiness to track. Rather than maintaining three separate restyle roots, we
|
||
// use a single root, and always bubble it up to be the nearest common ancestor
|
||
// of all the dirty content in the tree. This means that we need to track the
|
||
// types of dirtiness that the restyle root corresponds to, so
|
||
// SetServoRestyleRoot accepts a bitfield along with an element.
|
||
//
|
||
// The overall algorithm is as follows:
|
||
// * When the first dirty element is noted, we just set as the restyle root.
|
||
// * When additional dirty elements are noted, we propagate the given bit up
|
||
// the tree, until we either reach the restyle root or the document root.
|
||
// * If we reach the document root, we then propagate the bits associated with
|
||
// the restyle root up the tree until we cross the path of the new root. Once
|
||
// we find this common ancestor, we record it as the restyle root, and then
|
||
// clear the bits between the new restyle root and the document root.
|
||
// * If we have dirty content beneath multiple "document style traversal roots"
|
||
// (which are the main DOM + each piece of document-level native-anoymous
|
||
// content), we set the restyle root to the nsINode of the document itself.
|
||
// This is the bail-out case where we traverse everything.
|
||
//
|
||
// Note that, since we track a root, we try to optimize the case where an
|
||
// element under the current root is dirtied, that's why we don't trivially use
|
||
// `nsContentUtils::GetCommonFlattenedTreeAncestorForStyle`.
|
||
static void
|
||
NoteDirtyElement(Element* aElement, uint32_t aBits)
|
||
{
|
||
MOZ_ASSERT(aElement->IsInComposedDoc());
|
||
|
||
// Check the existing root early on, since it may allow us to short-circuit
|
||
// before examining the parent chain.
|
||
nsIDocument* doc = aElement->GetComposedDoc();
|
||
nsINode* existingRoot = doc->GetServoRestyleRoot();
|
||
if (existingRoot == aElement) {
|
||
doc->SetServoRestyleRootDirtyBits(doc->GetServoRestyleRootDirtyBits() | aBits);
|
||
return;
|
||
}
|
||
|
||
nsINode* parent = aElement->GetFlattenedTreeParentNodeForStyle();
|
||
if (!parent) {
|
||
// The element is not in the flattened tree, bail.
|
||
return;
|
||
}
|
||
|
||
if (MOZ_LIKELY(parent->IsElement())) {
|
||
// If our parent is unstyled, we can inductively assume that it will be
|
||
// traversed when the time is right, and that the traversal will reach us
|
||
// when it happens. Nothing left to do.
|
||
if (!parent->AsElement()->HasServoData()) {
|
||
return;
|
||
}
|
||
|
||
// Similarly, if our parent already has the bit we're propagating, we can
|
||
// assume everything is already set up.
|
||
if (parent->HasAllFlags(aBits)) {
|
||
return;
|
||
}
|
||
|
||
// If the parent is styled but is display:none, we're done.
|
||
//
|
||
// We can't check for a frame here, since <frame> elements inside <frameset>
|
||
// still need to generate a frame, even if they're display: none. :(
|
||
//
|
||
// The servo traversal doesn't keep style data under display: none subtrees,
|
||
// so in order for it to not need to cleanup each time anything happens in a
|
||
// display: none subtree, we keep it clean.
|
||
//
|
||
// Also, we can't be much more smarter about using the parent's frame in
|
||
// order to avoid work here, because since the style system keeps style data
|
||
// in, e.g., subtrees under a leaf frame, missing restyles and such in there
|
||
// has observable behavior via getComputedStyle, for example.
|
||
if (Servo_Element_IsDisplayNone(parent->AsElement())) {
|
||
return;
|
||
}
|
||
}
|
||
|
||
if (nsIPresShell* shell = doc->GetShell()) {
|
||
shell->EnsureStyleFlush();
|
||
}
|
||
|
||
MOZ_ASSERT(parent->IsElement() || parent == doc);
|
||
|
||
// The bit checks below rely on this to arrive to useful conclusions about the
|
||
// shape of the tree.
|
||
AssertNoBitsPropagatedFrom(existingRoot);
|
||
|
||
// If there's no existing restyle root, or if the root is already aElement,
|
||
// just note the root+bits and return.
|
||
if (!existingRoot) {
|
||
doc->SetServoRestyleRoot(aElement, aBits);
|
||
return;
|
||
}
|
||
|
||
// There is an existing restyle root - walk up the tree from our element,
|
||
// propagating bits as we go.
|
||
const bool reachedDocRoot =
|
||
!parent->IsElement() ||
|
||
!PropagateBits(parent->AsElement(), aBits, existingRoot, aBits);
|
||
|
||
uint32_t existingBits = doc->GetServoRestyleRootDirtyBits();
|
||
if (!reachedDocRoot || existingRoot == doc) {
|
||
// We're a descendant of the existing root. All that's left to do is to
|
||
// make sure the bit we propagated is also registered on the root.
|
||
doc->SetServoRestyleRoot(existingRoot, existingBits | aBits);
|
||
} else {
|
||
// We reached the root without crossing the pre-existing restyle root. We
|
||
// now need to find the nearest common ancestor, so climb up from the
|
||
// existing root, extending bits along the way.
|
||
Element* rootParent = existingRoot->GetFlattenedTreeParentElementForStyle();
|
||
// We can stop at the first occurrence of `aBits` in order to find the
|
||
// common ancestor.
|
||
if (Element* commonAncestor = PropagateBits(rootParent, existingBits, aElement, aBits)) {
|
||
MOZ_ASSERT(commonAncestor == aElement ||
|
||
commonAncestor == nsContentUtils::GetCommonFlattenedTreeAncestorForStyle(aElement, rootParent));
|
||
|
||
// We found a common ancestor. Make that the new style root, and clear the
|
||
// bits between the new style root and the document root.
|
||
doc->SetServoRestyleRoot(commonAncestor, existingBits | aBits);
|
||
Element* curr = commonAncestor;
|
||
while ((curr = curr->GetFlattenedTreeParentElementForStyle())) {
|
||
MOZ_ASSERT(curr->HasAllFlags(aBits));
|
||
curr->UnsetFlags(aBits);
|
||
}
|
||
AssertNoBitsPropagatedFrom(commonAncestor);
|
||
} else {
|
||
// We didn't find a common ancestor element. That means we're descended
|
||
// from two different document style roots, so the common ancestor is the
|
||
// document.
|
||
doc->SetServoRestyleRoot(doc, existingBits | aBits);
|
||
}
|
||
}
|
||
|
||
// See the comment in nsIDocument::SetServoRestyleRoot about the !IsElement()
|
||
// check there. Same justification here.
|
||
MOZ_ASSERT(aElement == doc->GetServoRestyleRoot() ||
|
||
!doc->GetServoRestyleRoot()->IsElement() ||
|
||
nsContentUtils::ContentIsFlattenedTreeDescendantOfForStyle(
|
||
aElement, doc->GetServoRestyleRoot()));
|
||
MOZ_ASSERT(aElement == doc->GetServoRestyleRoot() ||
|
||
!doc->GetServoRestyleRoot()->IsElement() ||
|
||
!parent->IsElement() ||
|
||
BitsArePropagated(parent->AsElement(), aBits, doc->GetServoRestyleRoot()));
|
||
MOZ_ASSERT(doc->GetServoRestyleRootDirtyBits() & aBits);
|
||
}
|
||
|
||
void
|
||
Element::NoteDirtySubtreeForServo()
|
||
{
|
||
MOZ_ASSERT(IsInComposedDoc());
|
||
MOZ_ASSERT(HasServoData());
|
||
|
||
nsIDocument* doc = GetComposedDoc();
|
||
nsINode* existingRoot = doc->GetServoRestyleRoot();
|
||
uint32_t existingBits = existingRoot ? doc->GetServoRestyleRootDirtyBits() : 0;
|
||
|
||
if (existingRoot &&
|
||
existingRoot->IsElement() &&
|
||
existingRoot != this &&
|
||
nsContentUtils::ContentIsFlattenedTreeDescendantOfForStyle(
|
||
existingRoot->AsElement(), this)) {
|
||
PropagateBits(existingRoot->AsElement()->GetFlattenedTreeParentElementForStyle(),
|
||
existingBits,
|
||
this,
|
||
existingBits);
|
||
|
||
doc->ClearServoRestyleRoot();
|
||
}
|
||
|
||
NoteDirtyElement(this, existingBits | ELEMENT_HAS_DIRTY_DESCENDANTS_FOR_SERVO);
|
||
}
|
||
|
||
void
|
||
Element::NoteDirtyForServo()
|
||
{
|
||
NoteDirtyElement(this, ELEMENT_HAS_DIRTY_DESCENDANTS_FOR_SERVO);
|
||
}
|
||
|
||
void
|
||
Element::NoteAnimationOnlyDirtyForServo()
|
||
{
|
||
NoteDirtyElement(this, ELEMENT_HAS_ANIMATION_ONLY_DIRTY_DESCENDANTS_FOR_SERVO);
|
||
}
|
||
|
||
void
|
||
Element::NoteDescendantsNeedFramesForServo()
|
||
{
|
||
// Since lazy frame construction can be required for non-element nodes, this
|
||
// Note() method operates on the parent of the frame-requiring content, unlike
|
||
// the other Note() methods above (which operate directly on the element that
|
||
// needs processing).
|
||
NoteDirtyElement(this, NODE_DESCENDANTS_NEED_FRAMES);
|
||
SetFlags(NODE_DESCENDANTS_NEED_FRAMES);
|
||
}
|