mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-28 23:31:56 +00:00
2109 lines
69 KiB
C++
2109 lines
69 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 and DocumentFragment.
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*/
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#include "mozilla/ArrayUtils.h"
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#include "mozilla/Likely.h"
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#include "mozilla/MemoryReporting.h"
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#include "mozilla/StaticPtr.h"
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#include "mozilla/dom/FragmentOrElement.h"
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#include "DOMIntersectionObserver.h"
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#include "mozilla/AsyncEventDispatcher.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/ElementAnimationData.h"
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#include "mozilla/HTMLEditor.h"
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#include "mozilla/mozInlineSpellChecker.h"
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#include "mozilla/PresShell.h"
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#include "mozilla/RestyleManager.h"
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#include "mozilla/TextEditor.h"
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#include "mozilla/TouchEvents.h"
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#include "mozilla/URLExtraData.h"
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#include "mozilla/dom/Attr.h"
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#include "mozilla/dom/RadioGroupContainer.h"
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#include "nsDOMAttributeMap.h"
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#include "nsAtom.h"
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#include "mozilla/dom/NodeInfo.h"
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#include "mozilla/dom/Event.h"
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#include "mozilla/dom/ScriptLoader.h"
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#include "mozilla/dom/TouchEvent.h"
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#include "mozilla/dom/CustomElementRegistry.h"
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#include "mozilla/dom/Document.h"
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#include "mozilla/dom/DocumentInlines.h"
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#include "nsIControllers.h"
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#include "nsIDocumentEncoder.h"
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#include "nsFocusManager.h"
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#include "nsIScriptGlobalObject.h"
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#include "nsNetUtil.h"
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#include "nsIFrame.h"
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#include "nsIAnonymousContentCreator.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 "nsDOMCSSAttrDeclaration.h"
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#include "nsNameSpaceManager.h"
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#include "nsContentList.h"
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#include "nsDOMTokenList.h"
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#include "nsError.h"
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#include "nsDOMString.h"
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#include "nsXULElement.h"
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#include "mozilla/InternalMutationEvent.h"
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#include "mozilla/MouseEvents.h"
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#include "nsAttrValueOrString.h"
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#include "nsQueryObject.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 "nsFrameLoader.h"
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#include "nsPIDOMWindow.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 "nsTextFragment.h"
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#include "nsContentCID.h"
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#include "nsWindowSizes.h"
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#include "nsIWidget.h"
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#include "nsNodeInfoManager.h"
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#include "nsGenericHTMLElement.h"
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#include "nsContentCreatorFunctions.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 "ChildIterator.h"
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#include "nsTextNode.h"
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#include "mozilla/dom/NodeListBinding.h"
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#include "nsCCUncollectableMarker.h"
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#include "mozAutoDocUpdate.h"
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#include "mozilla/Sprintf.h"
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#include "nsDOMMutationObserver.h"
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#include "nsWrapperCacheInlines.h"
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#include "nsCycleCollector.h"
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#include "xpcpublic.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/HTMLSlotElement.h"
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#include "mozilla/dom/HTMLTemplateElement.h"
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#include "mozilla/dom/SVGUseElement.h"
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#include "nsStyledElement.h"
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#include "nsIContentInlines.h"
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#include "nsChildContentList.h"
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#include "mozilla/BloomFilter.h"
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#include "NodeUbiReporting.h"
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#ifdef ACCESSIBILITY
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# include "nsAccessibilityService.h"
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#endif
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using namespace mozilla;
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using namespace mozilla::dom;
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int32_t nsIContent::sTabFocusModel = eTabFocus_any;
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bool nsIContent::sTabFocusModelAppliesToXUL = false;
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uint64_t nsMutationGuard::sGeneration = 0;
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NS_IMPL_CYCLE_COLLECTION_CLASS(nsIContent)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(nsIContent)
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MOZ_ASSERT_UNREACHABLE("Our subclasses don't call us");
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsIContent)
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MOZ_ASSERT_UNREACHABLE("Our subclasses don't call us");
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END
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NS_INTERFACE_MAP_BEGIN(nsIContent)
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NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
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// Don't bother to QI to cycle collection, because our CC impl is
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// not doing anything anyway.
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NS_INTERFACE_MAP_ENTRY(nsIContent)
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NS_INTERFACE_MAP_ENTRY(nsINode)
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NS_INTERFACE_MAP_ENTRY(mozilla::dom::EventTarget)
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NS_INTERFACE_MAP_ENTRY_TEAROFF(nsISupportsWeakReference,
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new nsNodeSupportsWeakRefTearoff(this))
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// DOM bindings depend on the identity pointer being the
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// same as nsINode (which nsIContent inherits).
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NS_INTERFACE_MAP_ENTRY(nsISupports)
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NS_INTERFACE_MAP_END
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NS_IMPL_CYCLE_COLLECTING_ADDREF(nsIContent)
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NS_IMPL_DOMARENA_DESTROY(nsIContent)
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NS_IMPL_CYCLE_COLLECTING_RELEASE_WITH_LAST_RELEASE_AND_DESTROY(nsIContent,
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LastRelease(),
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Destroy())
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nsIContent* nsIContent::FindFirstNonChromeOnlyAccessContent() const {
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// This handles also nested native anonymous content.
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for (const nsIContent* content = this; content;
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content = content->GetChromeOnlyAccessSubtreeRootParent()) {
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if (!content->ChromeOnlyAccess()) {
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// Oops, this function signature allows casting const to
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// non-const. (Then again, so does GetFirstChild()->GetParent().)
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return const_cast<nsIContent*>(content);
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}
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}
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return nullptr;
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}
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// https://dom.spec.whatwg.org/#dom-slotable-assignedslot
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HTMLSlotElement* nsIContent::GetAssignedSlotByMode() const {
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/**
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* Get slotable's assigned slot for the result of
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* find a slot with open flag UNSET [1].
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*
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* [1] https://dom.spec.whatwg.org/#assign-a-slot
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*/
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HTMLSlotElement* slot = GetAssignedSlot();
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if (!slot) {
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return nullptr;
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}
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MOZ_ASSERT(GetParent());
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MOZ_ASSERT(GetParent()->GetShadowRoot());
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/**
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* Additional check for open flag SET:
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* If slotable’s parent’s shadow root's mode is not "open",
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* then return null.
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*/
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if (GetParent()->GetShadowRoot()->IsClosed()) {
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return nullptr;
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}
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return slot;
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}
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nsIContent::IMEState nsIContent::GetDesiredIMEState() {
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if (!IsEditable()) {
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// Check for the special case where we're dealing with elements which don't
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// have the editable flag set, but are readwrite (such as text controls).
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if (!IsElement() ||
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!AsElement()->State().HasState(ElementState::READWRITE)) {
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return IMEState(IMEEnabled::Disabled);
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}
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}
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// NOTE: The content for independent editors (e.g., input[type=text],
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// textarea) must override this method, so, we don't need to worry about
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// that here.
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nsIContent* editableAncestor = GetEditingHost();
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// This is in another editable content, use the result of it.
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if (editableAncestor && editableAncestor != this) {
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return editableAncestor->GetDesiredIMEState();
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}
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Document* doc = GetComposedDoc();
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if (!doc) {
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return IMEState(IMEEnabled::Disabled);
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}
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nsPresContext* pc = doc->GetPresContext();
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if (!pc) {
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return IMEState(IMEEnabled::Disabled);
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}
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HTMLEditor* htmlEditor = nsContentUtils::GetHTMLEditor(pc);
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if (!htmlEditor) {
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return IMEState(IMEEnabled::Disabled);
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}
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IMEState state;
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htmlEditor->GetPreferredIMEState(&state);
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return state;
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}
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bool nsIContent::HasIndependentSelection() const {
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nsIFrame* frame = GetPrimaryFrame();
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return (frame && frame->HasAnyStateBits(NS_FRAME_INDEPENDENT_SELECTION));
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}
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dom::Element* nsIContent::GetEditingHost() {
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// If this isn't editable, return nullptr.
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if (!IsEditable()) {
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return nullptr;
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}
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Document* doc = GetComposedDoc();
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if (!doc) {
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return nullptr;
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}
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// If this is in designMode, we should return <body>
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if (IsInDesignMode() && !IsInShadowTree()) {
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return doc->GetBodyElement();
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}
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dom::Element* editableParentElement = nullptr;
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for (dom::Element* parent = GetParentElement();
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parent && parent->HasFlag(NODE_IS_EDITABLE);
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parent = editableParentElement->GetParentElement()) {
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editableParentElement = parent;
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}
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return editableParentElement ? editableParentElement
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: dom::Element::FromNode(this);
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}
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nsresult nsIContent::LookupNamespaceURIInternal(
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const nsAString& aNamespacePrefix, nsAString& aNamespaceURI) const {
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if (aNamespacePrefix.EqualsLiteral("xml")) {
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// Special-case for xml prefix
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aNamespaceURI.AssignLiteral("http://www.w3.org/XML/1998/namespace");
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return NS_OK;
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}
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if (aNamespacePrefix.EqualsLiteral("xmlns")) {
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// Special-case for xmlns prefix
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aNamespaceURI.AssignLiteral("http://www.w3.org/2000/xmlns/");
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return NS_OK;
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}
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RefPtr<nsAtom> name;
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if (!aNamespacePrefix.IsEmpty()) {
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name = NS_Atomize(aNamespacePrefix);
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NS_ENSURE_TRUE(name, NS_ERROR_OUT_OF_MEMORY);
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} else {
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name = nsGkAtoms::xmlns;
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}
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// Trace up the content parent chain looking for the namespace
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// declaration that declares aNamespacePrefix.
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for (Element* element = GetAsElementOrParentElement(); element;
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element = element->GetParentElement()) {
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if (element->GetAttr(kNameSpaceID_XMLNS, name, aNamespaceURI)) {
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return NS_OK;
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}
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}
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return NS_ERROR_FAILURE;
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}
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nsAtom* nsIContent::GetLang() const {
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for (const Element* element = GetAsElementOrParentElement(); element;
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element = element->GetParentElement()) {
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if (!element->GetAttrCount()) {
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continue;
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}
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// xml:lang has precedence over lang on HTML elements (see
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// XHTML1 section C.7).
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const nsAttrValue* attr =
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element->GetParsedAttr(nsGkAtoms::lang, kNameSpaceID_XML);
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if (!attr && element->SupportsLangAttr()) {
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attr = element->GetParsedAttr(nsGkAtoms::lang);
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}
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if (attr) {
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MOZ_ASSERT(attr->Type() == nsAttrValue::eAtom);
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MOZ_ASSERT(attr->GetAtomValue());
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return attr->GetAtomValue();
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}
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}
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return nullptr;
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}
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nsIURI* nsIContent::GetBaseURI(bool aTryUseXHRDocBaseURI) const {
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if (SVGUseElement* use = GetContainingSVGUseShadowHost()) {
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if (URLExtraData* data = use->GetContentURLData()) {
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return data->BaseURI();
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}
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}
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return OwnerDoc()->GetBaseURI(aTryUseXHRDocBaseURI);
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}
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nsIURI* nsIContent::GetBaseURIForStyleAttr() const {
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if (SVGUseElement* use = GetContainingSVGUseShadowHost()) {
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if (URLExtraData* data = use->GetContentURLData()) {
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return data->BaseURI();
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}
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}
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// This also ignores the case that SVG inside XBL binding.
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// But it is probably fine.
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return OwnerDoc()->GetDocBaseURI();
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}
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already_AddRefed<URLExtraData> nsIContent::GetURLDataForStyleAttr(
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nsIPrincipal* aSubjectPrincipal) const {
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if (SVGUseElement* use = GetContainingSVGUseShadowHost()) {
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if (URLExtraData* data = use->GetContentURLData()) {
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return do_AddRef(data);
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}
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}
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auto* doc = OwnerDoc();
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if (aSubjectPrincipal && aSubjectPrincipal != NodePrincipal()) {
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nsCOMPtr<nsIReferrerInfo> referrerInfo =
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doc->ReferrerInfoForInternalCSSAndSVGResources();
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// TODO: Cache this?
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return MakeAndAddRef<URLExtraData>(doc->GetDocBaseURI(), referrerInfo,
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aSubjectPrincipal);
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}
|
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return do_AddRef(doc->DefaultStyleAttrURLData());
|
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}
|
||
|
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void nsIContent::ConstructUbiNode(void* storage) {
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JS::ubi::Concrete<nsIContent>::construct(storage, this);
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}
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bool nsIContent::InclusiveDescendantMayNeedSpellchecking(HTMLEditor* aEditor) {
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// Return true if the node may have elements as children, since those or their
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// descendants may have spellcheck attributes.
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return HasFlag(NODE_MAY_HAVE_ELEMENT_CHILDREN) ||
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mozInlineSpellChecker::ShouldSpellCheckNode(aEditor, this);
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}
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//----------------------------------------------------------------------
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static inline JSObject* GetJSObjectChild(nsWrapperCache* aCache) {
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return aCache->PreservingWrapper() ? aCache->GetWrapperPreserveColor()
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: nullptr;
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}
|
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|
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static bool NeedsScriptTraverse(nsINode* aNode) {
|
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return aNode->PreservingWrapper() && aNode->GetWrapperPreserveColor() &&
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!aNode->HasKnownLiveWrapperAndDoesNotNeedTracing(aNode);
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}
|
||
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//----------------------------------------------------------------------
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NS_IMPL_CYCLE_COLLECTING_ADDREF(nsAttrChildContentList)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(nsAttrChildContentList)
|
||
|
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NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(nsAttrChildContentList, mNode)
|
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|
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// If the wrapper is known-live, the list can't be part of a garbage cycle.
|
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NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_BEGIN(nsAttrChildContentList)
|
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return tmp->HasKnownLiveWrapper();
|
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NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_END
|
||
|
||
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_BEGIN(nsAttrChildContentList)
|
||
return tmp->HasKnownLiveWrapperAndDoesNotNeedTracing(tmp);
|
||
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_END
|
||
|
||
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_BEGIN(nsAttrChildContentList)
|
||
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_END
|
||
|
||
NS_INTERFACE_TABLE_HEAD(nsAttrChildContentList)
|
||
NS_WRAPPERCACHE_INTERFACE_TABLE_ENTRY
|
||
NS_INTERFACE_TABLE(nsAttrChildContentList, nsINodeList)
|
||
NS_INTERFACE_TABLE_TO_MAP_SEGUE_CYCLE_COLLECTION(nsAttrChildContentList)
|
||
NS_INTERFACE_MAP_END
|
||
|
||
JSObject* nsAttrChildContentList::WrapObject(
|
||
JSContext* cx, JS::Handle<JSObject*> aGivenProto) {
|
||
return NodeList_Binding::Wrap(cx, this, aGivenProto);
|
||
}
|
||
|
||
uint32_t nsAttrChildContentList::Length() {
|
||
return mNode ? mNode->GetChildCount() : 0;
|
||
}
|
||
|
||
nsIContent* nsAttrChildContentList::Item(uint32_t aIndex) {
|
||
if (mNode) {
|
||
return mNode->GetChildAt_Deprecated(aIndex);
|
||
}
|
||
|
||
return nullptr;
|
||
}
|
||
|
||
int32_t nsAttrChildContentList::IndexOf(nsIContent* aContent) {
|
||
if (mNode) {
|
||
return mNode->ComputeIndexOf_Deprecated(aContent);
|
||
}
|
||
|
||
return -1;
|
||
}
|
||
|
||
//----------------------------------------------------------------------
|
||
uint32_t nsParentNodeChildContentList::Length() {
|
||
if (!mIsCacheValid && !ValidateCache()) {
|
||
return 0;
|
||
}
|
||
|
||
MOZ_ASSERT(mIsCacheValid);
|
||
|
||
return mCachedChildArray.Length();
|
||
}
|
||
|
||
nsIContent* nsParentNodeChildContentList::Item(uint32_t aIndex) {
|
||
if (!mIsCacheValid && !ValidateCache()) {
|
||
return nullptr;
|
||
}
|
||
|
||
MOZ_ASSERT(mIsCacheValid);
|
||
|
||
return mCachedChildArray.SafeElementAt(aIndex, nullptr);
|
||
}
|
||
|
||
int32_t nsParentNodeChildContentList::IndexOf(nsIContent* aContent) {
|
||
if (!mIsCacheValid && !ValidateCache()) {
|
||
return -1;
|
||
}
|
||
|
||
MOZ_ASSERT(mIsCacheValid);
|
||
|
||
return mCachedChildArray.IndexOf(aContent);
|
||
}
|
||
|
||
bool nsParentNodeChildContentList::ValidateCache() {
|
||
MOZ_ASSERT(!mIsCacheValid);
|
||
MOZ_ASSERT(mCachedChildArray.IsEmpty());
|
||
|
||
nsINode* parent = GetParentObject();
|
||
if (!parent) {
|
||
return false;
|
||
}
|
||
|
||
for (nsIContent* node = parent->GetFirstChild(); node;
|
||
node = node->GetNextSibling()) {
|
||
mCachedChildArray.AppendElement(node);
|
||
}
|
||
mIsCacheValid = true;
|
||
|
||
return true;
|
||
}
|
||
|
||
//----------------------------------------------------------------------
|
||
|
||
nsIHTMLCollection* FragmentOrElement::Children() {
|
||
nsDOMSlots* slots = DOMSlots();
|
||
|
||
if (!slots->mChildrenList) {
|
||
slots->mChildrenList =
|
||
new nsContentList(this, kNameSpaceID_Wildcard, nsGkAtoms::_asterisk,
|
||
nsGkAtoms::_asterisk, false);
|
||
}
|
||
|
||
return slots->mChildrenList;
|
||
}
|
||
|
||
//----------------------------------------------------------------------
|
||
|
||
NS_IMPL_CYCLE_COLLECTION(nsNodeSupportsWeakRefTearoff, mNode)
|
||
|
||
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsNodeSupportsWeakRefTearoff)
|
||
NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)
|
||
NS_INTERFACE_MAP_END_AGGREGATED(mNode)
|
||
|
||
NS_IMPL_CYCLE_COLLECTING_ADDREF(nsNodeSupportsWeakRefTearoff)
|
||
NS_IMPL_CYCLE_COLLECTING_RELEASE(nsNodeSupportsWeakRefTearoff)
|
||
|
||
NS_IMETHODIMP
|
||
nsNodeSupportsWeakRefTearoff::GetWeakReference(
|
||
nsIWeakReference** aInstancePtr) {
|
||
nsINode::nsSlots* slots = mNode->Slots();
|
||
if (!slots->mWeakReference) {
|
||
slots->mWeakReference = new nsNodeWeakReference(mNode);
|
||
}
|
||
|
||
NS_ADDREF(*aInstancePtr = slots->mWeakReference);
|
||
|
||
return NS_OK;
|
||
}
|
||
|
||
//----------------------------------------------------------------------
|
||
|
||
static const size_t MaxDOMSlotSizeAllowed =
|
||
#ifdef HAVE_64BIT_BUILD
|
||
128;
|
||
#else
|
||
64;
|
||
#endif
|
||
|
||
static_assert(sizeof(nsINode::nsSlots) <= MaxDOMSlotSizeAllowed,
|
||
"DOM slots cannot be grown without consideration");
|
||
static_assert(sizeof(FragmentOrElement::nsDOMSlots) <= MaxDOMSlotSizeAllowed,
|
||
"DOM slots cannot be grown without consideration");
|
||
|
||
void nsIContent::nsExtendedContentSlots::UnlinkExtendedSlots(nsIContent&) {
|
||
mContainingShadow = nullptr;
|
||
mAssignedSlot = nullptr;
|
||
}
|
||
|
||
void nsIContent::nsExtendedContentSlots::TraverseExtendedSlots(
|
||
nsCycleCollectionTraversalCallback& aCb) {
|
||
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(aCb, "mExtendedSlots->mContainingShadow");
|
||
aCb.NoteXPCOMChild(NS_ISUPPORTS_CAST(nsIContent*, mContainingShadow));
|
||
|
||
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(aCb, "mExtendedSlots->mAssignedSlot");
|
||
aCb.NoteXPCOMChild(NS_ISUPPORTS_CAST(nsIContent*, mAssignedSlot.get()));
|
||
}
|
||
|
||
nsIContent::nsExtendedContentSlots::nsExtendedContentSlots() = default;
|
||
|
||
nsIContent::nsExtendedContentSlots::~nsExtendedContentSlots() {
|
||
MOZ_ASSERT(!mManualSlotAssignment);
|
||
}
|
||
|
||
size_t nsIContent::nsExtendedContentSlots::SizeOfExcludingThis(
|
||
MallocSizeOf aMallocSizeOf) const {
|
||
// For now, nothing to measure here. We don't actually own any of our
|
||
// members.
|
||
return 0;
|
||
}
|
||
|
||
FragmentOrElement::nsDOMSlots::nsDOMSlots() : mDataset(nullptr) {
|
||
MOZ_COUNT_CTOR(nsDOMSlots);
|
||
}
|
||
|
||
FragmentOrElement::nsDOMSlots::~nsDOMSlots() {
|
||
MOZ_COUNT_DTOR(nsDOMSlots);
|
||
|
||
if (mAttributeMap) {
|
||
mAttributeMap->DropReference();
|
||
}
|
||
}
|
||
|
||
void FragmentOrElement::nsDOMSlots::Traverse(
|
||
nsCycleCollectionTraversalCallback& aCb) {
|
||
nsIContent::nsContentSlots::Traverse(aCb);
|
||
|
||
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(aCb, "mSlots->mStyle");
|
||
aCb.NoteXPCOMChild(mStyle.get());
|
||
|
||
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(aCb, "mSlots->mAttributeMap");
|
||
aCb.NoteXPCOMChild(mAttributeMap.get());
|
||
|
||
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(aCb, "mSlots->mChildrenList");
|
||
aCb.NoteXPCOMChild(NS_ISUPPORTS_CAST(nsINodeList*, mChildrenList));
|
||
|
||
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(aCb, "mSlots->mClassList");
|
||
aCb.NoteXPCOMChild(mClassList.get());
|
||
|
||
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(aCb, "mSlots->mPart");
|
||
aCb.NoteXPCOMChild(mPart.get());
|
||
}
|
||
|
||
void FragmentOrElement::nsDOMSlots::Unlink(nsINode& aNode) {
|
||
nsIContent::nsContentSlots::Unlink(aNode);
|
||
mStyle = nullptr;
|
||
if (mAttributeMap) {
|
||
mAttributeMap->DropReference();
|
||
mAttributeMap = nullptr;
|
||
}
|
||
mChildrenList = nullptr;
|
||
mClassList = nullptr;
|
||
mPart = nullptr;
|
||
}
|
||
|
||
size_t FragmentOrElement::nsDOMSlots::SizeOfIncludingThis(
|
||
MallocSizeOf aMallocSizeOf) const {
|
||
size_t n = aMallocSizeOf(this);
|
||
|
||
nsExtendedContentSlots* extendedSlots = GetExtendedContentSlots();
|
||
if (extendedSlots) {
|
||
if (OwnsExtendedSlots()) {
|
||
n += aMallocSizeOf(extendedSlots);
|
||
}
|
||
|
||
n += extendedSlots->SizeOfExcludingThis(aMallocSizeOf);
|
||
}
|
||
|
||
if (mAttributeMap) {
|
||
n += mAttributeMap->SizeOfIncludingThis(aMallocSizeOf);
|
||
}
|
||
|
||
if (mChildrenList) {
|
||
n += mChildrenList->SizeOfIncludingThis(aMallocSizeOf);
|
||
}
|
||
|
||
// Measurement of the following members may be added later if DMD finds it is
|
||
// worthwhile:
|
||
// - Superclass members (nsINode::nsSlots)
|
||
// - mStyle
|
||
// - mDataSet
|
||
// - mClassList
|
||
|
||
// The following member are not measured:
|
||
// - mControllers: because it is non-owning
|
||
return n;
|
||
}
|
||
|
||
FragmentOrElement::nsExtendedDOMSlots::nsExtendedDOMSlots() = default;
|
||
|
||
FragmentOrElement::nsExtendedDOMSlots::~nsExtendedDOMSlots() = default;
|
||
|
||
void FragmentOrElement::nsExtendedDOMSlots::UnlinkExtendedSlots(
|
||
nsIContent& aContent) {
|
||
nsIContent::nsExtendedContentSlots::UnlinkExtendedSlots(aContent);
|
||
|
||
// mShadowRoot will similarly be cleared explicitly from
|
||
// FragmentOrElement::Unlink.
|
||
mSMILOverrideStyle = nullptr;
|
||
mControllers = nullptr;
|
||
mLabelsList = nullptr;
|
||
mPopoverData = nullptr;
|
||
if (mCustomElementData) {
|
||
mCustomElementData->Unlink();
|
||
mCustomElementData = nullptr;
|
||
}
|
||
if (mAnimations) {
|
||
mAnimations = nullptr;
|
||
aContent.ClearMayHaveAnimations();
|
||
}
|
||
mExplicitlySetAttrElements.Clear();
|
||
mRadioGroupContainer = nullptr;
|
||
}
|
||
|
||
void FragmentOrElement::nsExtendedDOMSlots::TraverseExtendedSlots(
|
||
nsCycleCollectionTraversalCallback& aCb) {
|
||
nsIContent::nsExtendedContentSlots::TraverseExtendedSlots(aCb);
|
||
|
||
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(aCb, "mExtendedSlots->mSMILOverrideStyle");
|
||
aCb.NoteXPCOMChild(mSMILOverrideStyle.get());
|
||
|
||
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(aCb, "mExtendedSlots->mControllers");
|
||
aCb.NoteXPCOMChild(mControllers);
|
||
|
||
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(aCb, "mExtendedSlots->mLabelsList");
|
||
aCb.NoteXPCOMChild(NS_ISUPPORTS_CAST(nsINodeList*, mLabelsList));
|
||
|
||
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(aCb, "mExtendedSlots->mShadowRoot");
|
||
aCb.NoteXPCOMChild(NS_ISUPPORTS_CAST(nsIContent*, mShadowRoot));
|
||
|
||
if (mCustomElementData) {
|
||
mCustomElementData->Traverse(aCb);
|
||
}
|
||
if (mAnimations) {
|
||
mAnimations->Traverse(aCb);
|
||
}
|
||
if (mRadioGroupContainer) {
|
||
RadioGroupContainer::Traverse(mRadioGroupContainer.get(), aCb);
|
||
}
|
||
}
|
||
|
||
size_t FragmentOrElement::nsExtendedDOMSlots::SizeOfExcludingThis(
|
||
MallocSizeOf aMallocSizeOf) const {
|
||
size_t n =
|
||
nsIContent::nsExtendedContentSlots::SizeOfExcludingThis(aMallocSizeOf);
|
||
|
||
// We own mSMILOverrideStyle but there seems to be no memory reporting on CSS
|
||
// declarations? At least report the memory the declaration takes up
|
||
// directly.
|
||
if (mSMILOverrideStyle) {
|
||
n += aMallocSizeOf(mSMILOverrideStyle);
|
||
}
|
||
|
||
// We don't really own mSMILOverrideStyleDeclaration. mSMILOverrideStyle owns
|
||
// it.
|
||
|
||
// We don't seem to have memory reporting for nsXULControllers. At least
|
||
// report the memory it's using directly.
|
||
if (mControllers) {
|
||
n += aMallocSizeOf(mControllers);
|
||
}
|
||
|
||
if (mLabelsList) {
|
||
n += mLabelsList->SizeOfIncludingThis(aMallocSizeOf);
|
||
}
|
||
|
||
// mShadowRoot should be handled during normal DOM tree memory reporting, just
|
||
// like kids, siblings, etc.
|
||
|
||
if (mCustomElementData) {
|
||
n += mCustomElementData->SizeOfIncludingThis(aMallocSizeOf);
|
||
}
|
||
|
||
if (mRadioGroupContainer) {
|
||
n += mRadioGroupContainer->SizeOfIncludingThis(aMallocSizeOf);
|
||
}
|
||
|
||
return n;
|
||
}
|
||
|
||
FragmentOrElement::FragmentOrElement(
|
||
already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
|
||
: nsIContent(std::move(aNodeInfo)) {}
|
||
|
||
FragmentOrElement::~FragmentOrElement() {
|
||
MOZ_ASSERT(!IsInUncomposedDoc(),
|
||
"Please remove this from the document properly");
|
||
if (GetParent()) {
|
||
NS_RELEASE(mParent);
|
||
}
|
||
}
|
||
|
||
static nsINode* FindChromeAccessOnlySubtreeOwner(nsINode* aNode) {
|
||
if (!aNode->ChromeOnlyAccess()) {
|
||
return aNode;
|
||
}
|
||
return const_cast<nsIContent*>(aNode->GetChromeOnlyAccessSubtreeRootParent());
|
||
}
|
||
|
||
nsINode* FindChromeAccessOnlySubtreeOwner(EventTarget* aTarget) {
|
||
nsINode* node = nsINode::FromEventTargetOrNull(aTarget);
|
||
if (!node) {
|
||
return nullptr;
|
||
}
|
||
return FindChromeAccessOnlySubtreeOwner(node);
|
||
}
|
||
|
||
void nsIContent::GetEventTargetParent(EventChainPreVisitor& aVisitor) {
|
||
// FIXME! Document how this event retargeting works, Bug 329124.
|
||
aVisitor.mCanHandle = true;
|
||
aVisitor.mMayHaveListenerManager = HasListenerManager();
|
||
|
||
if (IsInShadowTree()) {
|
||
aVisitor.mItemInShadowTree = true;
|
||
}
|
||
|
||
// Don't propagate mouseover and mouseout events when mouse is moving
|
||
// inside chrome access only content.
|
||
bool isAnonForEvents = IsRootOfChromeAccessOnlySubtree();
|
||
aVisitor.mRootOfClosedTree = isAnonForEvents;
|
||
if ((aVisitor.mEvent->mMessage == eMouseOver ||
|
||
aVisitor.mEvent->mMessage == eMouseOut ||
|
||
aVisitor.mEvent->mMessage == ePointerOver ||
|
||
aVisitor.mEvent->mMessage == ePointerOut) &&
|
||
// Check if we should stop event propagation when event has just been
|
||
// dispatched or when we're about to propagate from
|
||
// chrome access only subtree or if we are about to propagate out of
|
||
// a shadow root to a shadow root host.
|
||
((this == aVisitor.mEvent->mOriginalTarget && !ChromeOnlyAccess()) ||
|
||
isAnonForEvents)) {
|
||
nsCOMPtr<nsIContent> relatedTarget = nsIContent::FromEventTargetOrNull(
|
||
aVisitor.mEvent->AsMouseEvent()->mRelatedTarget);
|
||
if (relatedTarget && relatedTarget->OwnerDoc() == OwnerDoc()) {
|
||
// If current target is anonymous for events or we know that related
|
||
// target is descendant of an element which is anonymous for events,
|
||
// we may want to stop event propagation.
|
||
// If this is the original target, aVisitor.mRelatedTargetIsInAnon
|
||
// must be updated.
|
||
if (isAnonForEvents || aVisitor.mRelatedTargetIsInAnon ||
|
||
(aVisitor.mEvent->mOriginalTarget == this &&
|
||
(aVisitor.mRelatedTargetIsInAnon =
|
||
relatedTarget->ChromeOnlyAccess()))) {
|
||
nsINode* anonOwner = FindChromeAccessOnlySubtreeOwner(this);
|
||
if (anonOwner) {
|
||
nsINode* anonOwnerRelated =
|
||
FindChromeAccessOnlySubtreeOwner(relatedTarget);
|
||
if (anonOwnerRelated) {
|
||
// Note, anonOwnerRelated may still be inside some other
|
||
// native anonymous subtree. The case where anonOwner is still
|
||
// inside native anonymous subtree will be handled when event
|
||
// propagates up in the DOM tree.
|
||
while (anonOwner != anonOwnerRelated &&
|
||
anonOwnerRelated->ChromeOnlyAccess()) {
|
||
anonOwnerRelated =
|
||
FindChromeAccessOnlySubtreeOwner(anonOwnerRelated);
|
||
}
|
||
if (anonOwner == anonOwnerRelated) {
|
||
#ifdef DEBUG_smaug
|
||
nsCOMPtr<nsIContent> originalTarget =
|
||
nsIContent::FromEventTargetOrNull(
|
||
aVisitor.mEvent->mOriginalTarget);
|
||
nsAutoString ot, ct, rt;
|
||
if (originalTarget) {
|
||
originalTarget->NodeInfo()->NameAtom()->ToString(ot);
|
||
}
|
||
NodeInfo()->NameAtom()->ToString(ct);
|
||
relatedTarget->NodeInfo()->NameAtom()->ToString(rt);
|
||
printf(
|
||
"Stopping %s propagation:"
|
||
"\n\toriginalTarget=%s \n\tcurrentTarget=%s %s"
|
||
"\n\trelatedTarget=%s %s \n%s",
|
||
(aVisitor.mEvent->mMessage == eMouseOver) ? "mouseover"
|
||
: "mouseout",
|
||
NS_ConvertUTF16toUTF8(ot).get(),
|
||
NS_ConvertUTF16toUTF8(ct).get(),
|
||
isAnonForEvents
|
||
? "(is native anonymous)"
|
||
: (ChromeOnlyAccess() ? "(is in native anonymous subtree)"
|
||
: ""),
|
||
NS_ConvertUTF16toUTF8(rt).get(),
|
||
relatedTarget->ChromeOnlyAccess()
|
||
? "(is in native anonymous subtree)"
|
||
: "",
|
||
(originalTarget &&
|
||
relatedTarget->FindFirstNonChromeOnlyAccessContent() ==
|
||
originalTarget->FindFirstNonChromeOnlyAccessContent())
|
||
? ""
|
||
: "Wrong event propagation!?!\n");
|
||
#endif
|
||
aVisitor.SetParentTarget(nullptr, false);
|
||
// Event should not propagate to non-anon content.
|
||
aVisitor.mCanHandle = isAnonForEvents;
|
||
return;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
// Event parent is the assigned slot, if node is assigned, or node's parent
|
||
// otherwise.
|
||
HTMLSlotElement* slot = GetAssignedSlot();
|
||
nsIContent* parent = slot ? slot : GetParent();
|
||
|
||
// Event may need to be retargeted if this is the root of a native
|
||
// anonymous content subtree or event is dispatched somewhere inside XBL.
|
||
if (isAnonForEvents) {
|
||
#ifdef DEBUG
|
||
// If a DOM event is explicitly dispatched using node.dispatchEvent(), then
|
||
// all the events are allowed even in the native anonymous content..
|
||
nsCOMPtr<nsIContent> t =
|
||
nsIContent::FromEventTargetOrNull(aVisitor.mEvent->mOriginalTarget);
|
||
NS_ASSERTION(!t || !t->ChromeOnlyAccess() ||
|
||
aVisitor.mEvent->mClass != eMutationEventClass ||
|
||
aVisitor.mDOMEvent,
|
||
"Mutation event dispatched in native anonymous content!?!");
|
||
#endif
|
||
aVisitor.mEventTargetAtParent = parent;
|
||
} else if (parent && aVisitor.mOriginalTargetIsInAnon) {
|
||
nsCOMPtr<nsIContent> content(
|
||
nsIContent::FromEventTargetOrNull(aVisitor.mEvent->mTarget));
|
||
if (content &&
|
||
content->GetClosestNativeAnonymousSubtreeRootParentOrHost() == parent) {
|
||
aVisitor.mEventTargetAtParent = parent;
|
||
}
|
||
}
|
||
|
||
if (!aVisitor.mEvent->mFlags.mComposedInNativeAnonymousContent &&
|
||
IsRootOfNativeAnonymousSubtree() && OwnerDoc()->GetWindow()) {
|
||
aVisitor.SetParentTarget(OwnerDoc()->GetWindow()->GetParentTarget(), true);
|
||
} else if (parent) {
|
||
aVisitor.SetParentTarget(parent, false);
|
||
if (slot) {
|
||
ShadowRoot* root = slot->GetContainingShadow();
|
||
if (root && root->IsClosed()) {
|
||
aVisitor.mParentIsSlotInClosedTree = true;
|
||
}
|
||
}
|
||
} else {
|
||
aVisitor.SetParentTarget(GetComposedDoc(), false);
|
||
}
|
||
|
||
if (!ChromeOnlyAccess() && !aVisitor.mRelatedTargetRetargetedInCurrentScope) {
|
||
// We don't support Shadow DOM in native anonymous content yet.
|
||
aVisitor.mRelatedTargetRetargetedInCurrentScope = true;
|
||
if (aVisitor.mEvent->mOriginalRelatedTarget) {
|
||
// https://dom.spec.whatwg.org/#concept-event-dispatch
|
||
// Step 3.
|
||
// "Let relatedTarget be the result of retargeting event's relatedTarget
|
||
// against target if event's relatedTarget is non-null, and null
|
||
// otherwise."
|
||
//
|
||
// This is a bit complicated because the event might be from native
|
||
// anonymous content, but we need to deal with non-native anonymous
|
||
// content there.
|
||
bool initialTarget = this == aVisitor.mEvent->mOriginalTarget;
|
||
nsCOMPtr<nsINode> originalTargetAsNode;
|
||
// Use of mOriginalTargetIsInAnon is an optimization here.
|
||
if (!initialTarget && aVisitor.mOriginalTargetIsInAnon) {
|
||
originalTargetAsNode =
|
||
FindChromeAccessOnlySubtreeOwner(aVisitor.mEvent->mOriginalTarget);
|
||
initialTarget = originalTargetAsNode == this;
|
||
}
|
||
if (initialTarget) {
|
||
nsCOMPtr<nsINode> relatedTargetAsNode =
|
||
FindChromeAccessOnlySubtreeOwner(
|
||
aVisitor.mEvent->mOriginalRelatedTarget);
|
||
if (!originalTargetAsNode) {
|
||
originalTargetAsNode =
|
||
nsINode::FromEventTargetOrNull(aVisitor.mEvent->mOriginalTarget);
|
||
}
|
||
|
||
if (relatedTargetAsNode && originalTargetAsNode) {
|
||
nsINode* retargetedRelatedTarget = nsContentUtils::Retarget(
|
||
relatedTargetAsNode, originalTargetAsNode);
|
||
if (originalTargetAsNode == retargetedRelatedTarget &&
|
||
retargetedRelatedTarget != relatedTargetAsNode) {
|
||
// Step 4.
|
||
// "If target is relatedTarget and target is not event's
|
||
// relatedTarget, then return true."
|
||
aVisitor.IgnoreCurrentTargetBecauseOfShadowDOMRetargeting();
|
||
// Old code relies on mTarget to point to the first element which
|
||
// was not added to the event target chain because of mCanHandle
|
||
// being false, but in Shadow DOM case mTarget really should
|
||
// point to a node in Shadow DOM.
|
||
aVisitor.mEvent->mTarget = aVisitor.mTargetInKnownToBeHandledScope;
|
||
return;
|
||
}
|
||
|
||
// Part of step 5. Retargeting target has happened already higher
|
||
// up in this method.
|
||
// "Append to an event path with event, target, targetOverride,
|
||
// relatedTarget, and false."
|
||
aVisitor.mRetargetedRelatedTarget = retargetedRelatedTarget;
|
||
}
|
||
} else {
|
||
nsCOMPtr<nsINode> relatedTargetAsNode =
|
||
FindChromeAccessOnlySubtreeOwner(
|
||
aVisitor.mEvent->mOriginalRelatedTarget);
|
||
if (relatedTargetAsNode) {
|
||
// Step 11.3.
|
||
// "Let relatedTarget be the result of retargeting event's
|
||
// relatedTarget against parent if event's relatedTarget is non-null,
|
||
// and null otherwise.".
|
||
nsINode* retargetedRelatedTarget =
|
||
nsContentUtils::Retarget(relatedTargetAsNode, this);
|
||
nsCOMPtr<nsINode> targetInKnownToBeHandledScope =
|
||
FindChromeAccessOnlySubtreeOwner(
|
||
aVisitor.mTargetInKnownToBeHandledScope);
|
||
// If aVisitor.mTargetInKnownToBeHandledScope wasn't nsINode,
|
||
// targetInKnownToBeHandledScope will be null. This may happen when
|
||
// dispatching event to Window object in a content page and
|
||
// propagating the event to a chrome Element.
|
||
if (targetInKnownToBeHandledScope &&
|
||
IsShadowIncludingInclusiveDescendantOf(
|
||
targetInKnownToBeHandledScope->SubtreeRoot())) {
|
||
// Part of step 11.4.
|
||
// "If target's root is a shadow-including inclusive ancestor of
|
||
// parent, then"
|
||
// "...Append to an event path with event, parent, null,
|
||
// relatedTarget, " and slot-in-closed-tree."
|
||
aVisitor.mRetargetedRelatedTarget = retargetedRelatedTarget;
|
||
} else if (this == retargetedRelatedTarget) {
|
||
// Step 11.5
|
||
// "Otherwise, if parent and relatedTarget are identical, then set
|
||
// parent to null."
|
||
aVisitor.IgnoreCurrentTargetBecauseOfShadowDOMRetargeting();
|
||
// Old code relies on mTarget to point to the first element which
|
||
// was not added to the event target chain because of mCanHandle
|
||
// being false, but in Shadow DOM case mTarget really should
|
||
// point to a node in Shadow DOM.
|
||
aVisitor.mEvent->mTarget = aVisitor.mTargetInKnownToBeHandledScope;
|
||
return;
|
||
} else if (targetInKnownToBeHandledScope) {
|
||
// Note, if targetInKnownToBeHandledScope is null,
|
||
// mTargetInKnownToBeHandledScope could be Window object in content
|
||
// page and we're in chrome document in the same process.
|
||
|
||
// Step 11.6
|
||
aVisitor.mRetargetedRelatedTarget = retargetedRelatedTarget;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
if (aVisitor.mEvent->mClass == eTouchEventClass) {
|
||
// Retarget touch objects.
|
||
MOZ_ASSERT(!aVisitor.mRetargetedTouchTargets.isSome());
|
||
aVisitor.mRetargetedTouchTargets.emplace();
|
||
WidgetTouchEvent* touchEvent = aVisitor.mEvent->AsTouchEvent();
|
||
WidgetTouchEvent::TouchArray& touches = touchEvent->mTouches;
|
||
for (uint32_t i = 0; i < touches.Length(); ++i) {
|
||
Touch* touch = touches[i];
|
||
EventTarget* originalTarget = touch->mOriginalTarget;
|
||
EventTarget* touchTarget = originalTarget;
|
||
nsCOMPtr<nsINode> targetAsNode =
|
||
nsINode::FromEventTargetOrNull(originalTarget);
|
||
if (targetAsNode) {
|
||
EventTarget* retargeted =
|
||
nsContentUtils::Retarget(targetAsNode, this);
|
||
if (retargeted) {
|
||
touchTarget = retargeted;
|
||
}
|
||
}
|
||
aVisitor.mRetargetedTouchTargets->AppendElement(touchTarget);
|
||
touch->mTarget = touchTarget;
|
||
}
|
||
MOZ_ASSERT(aVisitor.mRetargetedTouchTargets->Length() ==
|
||
touches.Length());
|
||
}
|
||
}
|
||
|
||
if (slot) {
|
||
// Inform that we're about to exit the current scope.
|
||
aVisitor.mRelatedTargetRetargetedInCurrentScope = false;
|
||
}
|
||
}
|
||
|
||
bool nsIContent::IsFocusable(int32_t* aTabIndex, bool aWithMouse) {
|
||
bool focusable = IsFocusableInternal(aTabIndex, aWithMouse);
|
||
// Ensure that the return value and aTabIndex are consistent in the case
|
||
// we're in userfocusignored context.
|
||
if (focusable || (aTabIndex && *aTabIndex != -1)) {
|
||
return focusable;
|
||
}
|
||
return false;
|
||
}
|
||
|
||
Element* nsIContent::GetAutofocusDelegate(bool aWithMouse) const {
|
||
for (nsINode* node = GetFirstChild(); node; node = node->GetNextNode(this)) {
|
||
auto* descendant = Element::FromNode(*node);
|
||
if (!descendant || !descendant->GetBoolAttr(nsGkAtoms::autofocus)) {
|
||
continue;
|
||
}
|
||
|
||
nsIFrame* frame = descendant->GetPrimaryFrame();
|
||
if (frame && frame->IsFocusable(aWithMouse)) {
|
||
return descendant;
|
||
}
|
||
}
|
||
return nullptr;
|
||
}
|
||
|
||
Element* nsIContent::GetFocusDelegate(bool aWithMouse) const {
|
||
const nsIContent* whereToLook = this;
|
||
if (ShadowRoot* root = GetShadowRoot()) {
|
||
if (!root->DelegatesFocus()) {
|
||
// 1. If focusTarget is a shadow host and its shadow root 's delegates
|
||
// focus is false, then return null.
|
||
return nullptr;
|
||
}
|
||
whereToLook = root;
|
||
}
|
||
|
||
auto IsFocusable = [&](Element* aElement) -> nsIFrame::Focusable {
|
||
nsIFrame* frame = aElement->GetPrimaryFrame();
|
||
|
||
if (!frame) {
|
||
return {};
|
||
}
|
||
|
||
return frame->IsFocusable(aWithMouse);
|
||
};
|
||
|
||
Element* potentialFocus = nullptr;
|
||
for (nsINode* node = whereToLook->GetFirstChild(); node;
|
||
node = node->GetNextNode(whereToLook)) {
|
||
auto* el = Element::FromNode(*node);
|
||
if (!el) {
|
||
continue;
|
||
}
|
||
|
||
const bool autofocus = el->GetBoolAttr(nsGkAtoms::autofocus);
|
||
|
||
if (autofocus) {
|
||
if (IsFocusable(el)) {
|
||
// Found an autofocus candidate.
|
||
return el;
|
||
}
|
||
} else if (!potentialFocus) {
|
||
if (nsIFrame::Focusable focusable = IsFocusable(el)) {
|
||
if (IsHTMLElement(nsGkAtoms::dialog)) {
|
||
if (focusable.mTabIndex >= 0) {
|
||
// If focusTarget is a dialog element and descendant is sequentially
|
||
// focusable, then set focusableArea to descendant.
|
||
potentialFocus = el;
|
||
}
|
||
} else {
|
||
// This element could be the one if we can't find an
|
||
// autofocus candidate which has the precedence.
|
||
potentialFocus = el;
|
||
}
|
||
}
|
||
}
|
||
|
||
if (!autofocus && potentialFocus) {
|
||
// Nothing else to do, we are not looking for more focusable elements
|
||
// here.
|
||
continue;
|
||
}
|
||
|
||
if (auto* shadow = el->GetShadowRoot()) {
|
||
if (shadow->DelegatesFocus()) {
|
||
if (Element* delegatedFocus = shadow->GetFocusDelegate(aWithMouse)) {
|
||
if (autofocus) {
|
||
// This element has autofocus and we found an focus delegates
|
||
// in its descendants, so use the focus delegates
|
||
return delegatedFocus;
|
||
}
|
||
if (!potentialFocus) {
|
||
potentialFocus = delegatedFocus;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
return potentialFocus;
|
||
}
|
||
|
||
bool nsIContent::IsFocusableInternal(int32_t* aTabIndex, bool aWithMouse) {
|
||
if (aTabIndex) {
|
||
*aTabIndex = -1; // Default, not tabbable
|
||
}
|
||
return false;
|
||
}
|
||
|
||
void nsIContent::SetAssignedSlot(HTMLSlotElement* aSlot) {
|
||
MOZ_ASSERT(aSlot || GetExistingExtendedContentSlots());
|
||
ExtendedContentSlots()->mAssignedSlot = aSlot;
|
||
}
|
||
|
||
static Maybe<uint32_t> DoComputeFlatTreeIndexOf(FlattenedChildIterator& aIter,
|
||
const nsINode* aPossibleChild) {
|
||
if (aPossibleChild->GetFlattenedTreeParentNode() != aIter.Parent()) {
|
||
return Nothing();
|
||
}
|
||
|
||
uint32_t index = 0u;
|
||
for (nsIContent* child = aIter.GetNextChild(); child;
|
||
child = aIter.GetNextChild()) {
|
||
if (child == aPossibleChild) {
|
||
return Some(index);
|
||
}
|
||
|
||
++index;
|
||
}
|
||
|
||
return Nothing();
|
||
}
|
||
|
||
Maybe<uint32_t> nsIContent::ComputeFlatTreeIndexOf(
|
||
const nsINode* aPossibleChild) const {
|
||
if (!aPossibleChild) {
|
||
return Nothing();
|
||
}
|
||
|
||
FlattenedChildIterator iter(this);
|
||
if (!iter.ShadowDOMInvolved()) {
|
||
auto index = ComputeIndexOf(aPossibleChild);
|
||
MOZ_ASSERT(DoComputeFlatTreeIndexOf(iter, aPossibleChild) == index);
|
||
return index;
|
||
}
|
||
|
||
return DoComputeFlatTreeIndexOf(iter, aPossibleChild);
|
||
}
|
||
|
||
#ifdef MOZ_DOM_LIST
|
||
void nsIContent::Dump() { List(); }
|
||
#endif
|
||
|
||
void FragmentOrElement::GetTextContentInternal(nsAString& aTextContent,
|
||
OOMReporter& aError) {
|
||
if (!nsContentUtils::GetNodeTextContent(this, true, aTextContent, fallible)) {
|
||
aError.ReportOOM();
|
||
}
|
||
}
|
||
|
||
void FragmentOrElement::SetTextContentInternal(const nsAString& aTextContent,
|
||
nsIPrincipal* aSubjectPrincipal,
|
||
ErrorResult& aError) {
|
||
bool tryReuse = false;
|
||
if (!aTextContent.IsEmpty()) {
|
||
if (nsIContent* firstChild = GetFirstChild()) {
|
||
tryReuse = firstChild->NodeType() == TEXT_NODE &&
|
||
!firstChild->GetNextSibling() &&
|
||
firstChild->OwnedOnlyByTheDOMAndFrameTrees() &&
|
||
#ifdef ACCESSIBILITY
|
||
!GetAccService() &&
|
||
#endif
|
||
!OwnerDoc()->MayHaveDOMMutationObservers() &&
|
||
!nsContentUtils::HasMutationListeners(
|
||
OwnerDoc(), NS_EVENT_BITS_MUTATION_ALL);
|
||
}
|
||
}
|
||
|
||
aError = nsContentUtils::SetNodeTextContent(this, aTextContent, tryReuse);
|
||
}
|
||
|
||
void FragmentOrElement::DestroyContent() {
|
||
// Drop any servo data. We do this before the RemovedFromDocument call below
|
||
// so that it doesn't need to try to keep the style state sane when shuffling
|
||
// around the flattened tree.
|
||
//
|
||
// TODO(emilio): I suspect this can be asserted against instead, with a bit of
|
||
// effort to avoid calling Document::Destroy with a shell...
|
||
if (IsElement()) {
|
||
AsElement()->ClearServoData();
|
||
}
|
||
|
||
#ifdef DEBUG
|
||
uint32_t oldChildCount = GetChildCount();
|
||
#endif
|
||
|
||
for (nsIContent* child = GetFirstChild(); child;
|
||
child = child->GetNextSibling()) {
|
||
child->DestroyContent();
|
||
MOZ_ASSERT(child->GetParent() == this,
|
||
"Mutating the tree during XBL destructors is evil");
|
||
}
|
||
|
||
MOZ_ASSERT(oldChildCount == GetChildCount(),
|
||
"Mutating the tree during XBL destructors is evil");
|
||
|
||
if (ShadowRoot* shadowRoot = GetShadowRoot()) {
|
||
shadowRoot->DestroyContent();
|
||
}
|
||
}
|
||
|
||
void FragmentOrElement::SaveSubtreeState() {
|
||
for (nsIContent* child = GetFirstChild(); child;
|
||
child = child->GetNextSibling()) {
|
||
child->SaveSubtreeState();
|
||
}
|
||
|
||
// FIXME(bug 1469277): Pretty sure this wants to dig into shadow trees as
|
||
// well.
|
||
}
|
||
|
||
//----------------------------------------------------------------------
|
||
|
||
// Generic DOMNode implementations
|
||
|
||
void FragmentOrElement::FireNodeInserted(
|
||
Document* aDoc, nsINode* aParent,
|
||
const nsTArray<nsCOMPtr<nsIContent>>& aNodes) {
|
||
for (const nsCOMPtr<nsIContent>& childContent : aNodes) {
|
||
if (nsContentUtils::HasMutationListeners(
|
||
childContent, NS_EVENT_BITS_MUTATION_NODEINSERTED, aParent)) {
|
||
InternalMutationEvent mutation(true, eLegacyNodeInserted);
|
||
mutation.mRelatedNode = aParent;
|
||
|
||
mozAutoSubtreeModified subtree(aDoc, aParent);
|
||
AsyncEventDispatcher::RunDOMEventWhenSafe(*childContent, mutation);
|
||
}
|
||
}
|
||
}
|
||
|
||
//----------------------------------------------------------------------
|
||
|
||
// nsISupports implementation
|
||
|
||
#define SUBTREE_UNBINDINGS_PER_RUNNABLE 500
|
||
|
||
class ContentUnbinder : public Runnable {
|
||
public:
|
||
ContentUnbinder() : Runnable("ContentUnbinder") { mLast = this; }
|
||
|
||
~ContentUnbinder() { Run(); }
|
||
|
||
void UnbindSubtree(nsIContent* aNode) {
|
||
if (aNode->NodeType() != nsINode::ELEMENT_NODE &&
|
||
aNode->NodeType() != nsINode::DOCUMENT_FRAGMENT_NODE) {
|
||
return;
|
||
}
|
||
FragmentOrElement* container = static_cast<FragmentOrElement*>(aNode);
|
||
if (container->HasChildren()) {
|
||
// Invalidate cached array of child nodes
|
||
container->InvalidateChildNodes();
|
||
|
||
while (container->HasChildren()) {
|
||
// Hold a strong ref to the node when we remove it, because we may be
|
||
// the last reference to it. We need to call DisconnectChild()
|
||
// before calling UnbindFromTree, since this last can notify various
|
||
// observers and they should really see consistent
|
||
// tree state.
|
||
// If this code changes, change the corresponding code in
|
||
// FragmentOrElement's and Document's unlink impls.
|
||
nsCOMPtr<nsIContent> child = container->GetLastChild();
|
||
container->DisconnectChild(child);
|
||
UnbindSubtree(child);
|
||
child->UnbindFromTree();
|
||
}
|
||
}
|
||
}
|
||
|
||
NS_IMETHOD Run() override {
|
||
nsAutoScriptBlocker scriptBlocker;
|
||
uint32_t len = mSubtreeRoots.Length();
|
||
if (len) {
|
||
for (uint32_t i = 0; i < len; ++i) {
|
||
UnbindSubtree(mSubtreeRoots[i]);
|
||
}
|
||
mSubtreeRoots.Clear();
|
||
}
|
||
nsCycleCollector_dispatchDeferredDeletion();
|
||
if (this == sContentUnbinder) {
|
||
sContentUnbinder = nullptr;
|
||
if (mNext) {
|
||
RefPtr<ContentUnbinder> next;
|
||
next.swap(mNext);
|
||
sContentUnbinder = next;
|
||
next->mLast = mLast;
|
||
mLast = nullptr;
|
||
NS_DispatchToCurrentThreadQueue(next.forget(),
|
||
EventQueuePriority::Idle);
|
||
}
|
||
}
|
||
return NS_OK;
|
||
}
|
||
|
||
static void UnbindAll() {
|
||
RefPtr<ContentUnbinder> ub = sContentUnbinder;
|
||
sContentUnbinder = nullptr;
|
||
while (ub) {
|
||
ub->Run();
|
||
ub = ub->mNext;
|
||
}
|
||
}
|
||
|
||
static void Append(nsIContent* aSubtreeRoot) {
|
||
if (!sContentUnbinder) {
|
||
sContentUnbinder = new ContentUnbinder();
|
||
nsCOMPtr<nsIRunnable> e = sContentUnbinder;
|
||
NS_DispatchToCurrentThreadQueue(e.forget(), EventQueuePriority::Idle);
|
||
}
|
||
|
||
if (sContentUnbinder->mLast->mSubtreeRoots.Length() >=
|
||
SUBTREE_UNBINDINGS_PER_RUNNABLE) {
|
||
sContentUnbinder->mLast->mNext = new ContentUnbinder();
|
||
sContentUnbinder->mLast = sContentUnbinder->mLast->mNext;
|
||
}
|
||
sContentUnbinder->mLast->mSubtreeRoots.AppendElement(aSubtreeRoot);
|
||
}
|
||
|
||
private:
|
||
AutoTArray<nsCOMPtr<nsIContent>, SUBTREE_UNBINDINGS_PER_RUNNABLE>
|
||
mSubtreeRoots;
|
||
RefPtr<ContentUnbinder> mNext;
|
||
ContentUnbinder* mLast;
|
||
static ContentUnbinder* sContentUnbinder;
|
||
};
|
||
|
||
ContentUnbinder* ContentUnbinder::sContentUnbinder = nullptr;
|
||
|
||
void FragmentOrElement::ClearContentUnbinder() { ContentUnbinder::UnbindAll(); }
|
||
|
||
// Note, _INHERITED macro isn't used here since nsINode implementations are
|
||
// rather special.
|
||
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_CLASS(FragmentOrElement)
|
||
|
||
// We purposefully don't UNLINK_BEGIN_INHERITED here.
|
||
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(FragmentOrElement)
|
||
nsIContent::Unlink(tmp);
|
||
|
||
if (tmp->HasProperties()) {
|
||
if (tmp->IsElement()) {
|
||
Element* elem = tmp->AsElement();
|
||
elem->UnlinkIntersectionObservers();
|
||
}
|
||
|
||
if (tmp->IsHTMLElement() || tmp->IsSVGElement()) {
|
||
nsStaticAtom* const* props =
|
||
Element::HTMLSVGPropertiesToTraverseAndUnlink();
|
||
for (uint32_t i = 0; props[i]; ++i) {
|
||
tmp->RemoveProperty(props[i]);
|
||
}
|
||
}
|
||
}
|
||
|
||
// Unlink child content (and unbind our subtree).
|
||
if (tmp->UnoptimizableCCNode() || !nsCCUncollectableMarker::sGeneration) {
|
||
// Don't allow script to run while we're unbinding everything.
|
||
nsAutoScriptBlocker scriptBlocker;
|
||
while (tmp->HasChildren()) {
|
||
// Hold a strong ref to the node when we remove it, because we may be
|
||
// the last reference to it.
|
||
// If this code changes, change the corresponding code in Document's
|
||
// unlink impl and ContentUnbinder::UnbindSubtree.
|
||
nsCOMPtr<nsIContent> child = tmp->GetLastChild();
|
||
tmp->DisconnectChild(child);
|
||
child->UnbindFromTree();
|
||
}
|
||
} else if (!tmp->GetParent() && tmp->HasChildren()) {
|
||
ContentUnbinder::Append(tmp);
|
||
} /* else {
|
||
The subtree root will end up to a ContentUnbinder, and that will
|
||
unbind the child nodes.
|
||
} */
|
||
|
||
if (ShadowRoot* shadowRoot = tmp->GetShadowRoot()) {
|
||
shadowRoot->Unbind();
|
||
tmp->ExtendedDOMSlots()->mShadowRoot = nullptr;
|
||
}
|
||
|
||
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
|
||
|
||
void FragmentOrElement::MarkNodeChildren(nsINode* aNode) {
|
||
JSObject* o = GetJSObjectChild(aNode);
|
||
if (o) {
|
||
JS::ExposeObjectToActiveJS(o);
|
||
}
|
||
|
||
EventListenerManager* elm = aNode->GetExistingListenerManager();
|
||
if (elm) {
|
||
elm->MarkForCC();
|
||
}
|
||
}
|
||
|
||
nsINode* FindOptimizableSubtreeRoot(nsINode* aNode) {
|
||
nsINode* p;
|
||
while ((p = aNode->GetParentNode())) {
|
||
if (aNode->UnoptimizableCCNode()) {
|
||
return nullptr;
|
||
}
|
||
aNode = p;
|
||
}
|
||
|
||
if (aNode->UnoptimizableCCNode()) {
|
||
return nullptr;
|
||
}
|
||
return aNode;
|
||
}
|
||
|
||
StaticAutoPtr<nsTHashSet<nsINode*>> gCCBlackMarkedNodes;
|
||
|
||
static void ClearBlackMarkedNodes() {
|
||
if (!gCCBlackMarkedNodes) {
|
||
return;
|
||
}
|
||
for (nsINode* n : *gCCBlackMarkedNodes) {
|
||
n->SetCCMarkedRoot(false);
|
||
n->SetInCCBlackTree(false);
|
||
}
|
||
gCCBlackMarkedNodes = nullptr;
|
||
}
|
||
|
||
// static
|
||
void FragmentOrElement::RemoveBlackMarkedNode(nsINode* aNode) {
|
||
if (!gCCBlackMarkedNodes) {
|
||
return;
|
||
}
|
||
gCCBlackMarkedNodes->Remove(aNode);
|
||
}
|
||
|
||
static bool IsCertainlyAliveNode(nsINode* aNode, Document* aDoc) {
|
||
MOZ_ASSERT(aNode->GetComposedDoc() == aDoc);
|
||
|
||
// Marked to be in-CC-generation or if the document is an svg image that's
|
||
// being kept alive by the image cache. (Note that an svg image's internal
|
||
// SVG document will receive an OnPageHide() call when it gets purged from
|
||
// the image cache; hence, we use IsVisible() as a hint that the document is
|
||
// actively being kept alive by the cache.)
|
||
return nsCCUncollectableMarker::InGeneration(aDoc->GetMarkedCCGeneration()) ||
|
||
(nsCCUncollectableMarker::sGeneration && aDoc->IsBeingUsedAsImage() &&
|
||
aDoc->IsVisible());
|
||
}
|
||
|
||
// static
|
||
bool FragmentOrElement::CanSkipInCC(nsINode* aNode) {
|
||
// Don't try to optimize anything during shutdown.
|
||
if (nsCCUncollectableMarker::sGeneration == 0) {
|
||
return false;
|
||
}
|
||
|
||
Document* currentDoc = aNode->GetComposedDoc();
|
||
if (currentDoc && IsCertainlyAliveNode(aNode, currentDoc)) {
|
||
return !NeedsScriptTraverse(aNode);
|
||
}
|
||
|
||
// Bail out early if aNode is somewhere in anonymous content,
|
||
// or otherwise unusual.
|
||
if (aNode->UnoptimizableCCNode()) {
|
||
return false;
|
||
}
|
||
|
||
nsINode* root = currentDoc ? static_cast<nsINode*>(currentDoc)
|
||
: FindOptimizableSubtreeRoot(aNode);
|
||
if (!root) {
|
||
return false;
|
||
}
|
||
|
||
// Subtree has been traversed already.
|
||
if (root->CCMarkedRoot()) {
|
||
return root->InCCBlackTree() && !NeedsScriptTraverse(aNode);
|
||
}
|
||
|
||
if (!gCCBlackMarkedNodes) {
|
||
gCCBlackMarkedNodes = new nsTHashSet<nsINode*>(1020);
|
||
}
|
||
|
||
// nodesToUnpurple contains nodes which will be removed
|
||
// from the purple buffer if the DOM tree is known-live.
|
||
AutoTArray<nsIContent*, 1020> nodesToUnpurple;
|
||
// grayNodes need script traverse, so they aren't removed from
|
||
// the purple buffer, but are marked to be in known-live subtree so that
|
||
// traverse is faster.
|
||
AutoTArray<nsINode*, 1020> grayNodes;
|
||
|
||
bool foundLiveWrapper = root->HasKnownLiveWrapper();
|
||
if (root != currentDoc) {
|
||
currentDoc = nullptr;
|
||
if (NeedsScriptTraverse(root)) {
|
||
grayNodes.AppendElement(root);
|
||
} else if (static_cast<nsIContent*>(root)->IsPurple()) {
|
||
nodesToUnpurple.AppendElement(static_cast<nsIContent*>(root));
|
||
}
|
||
}
|
||
|
||
// Traverse the subtree and check if we could know without CC
|
||
// that it is known-live.
|
||
// Note, this traverse is non-virtual and inline, so it should be a lot faster
|
||
// than CC's generic traverse.
|
||
for (nsIContent* node = root->GetFirstChild(); node;
|
||
node = node->GetNextNode(root)) {
|
||
foundLiveWrapper = foundLiveWrapper || node->HasKnownLiveWrapper();
|
||
if (foundLiveWrapper && currentDoc) {
|
||
// If we can mark the whole document known-live, no need to optimize
|
||
// so much, since when the next purple node in the document will be
|
||
// handled, it is fast to check that currentDoc is in CCGeneration.
|
||
break;
|
||
}
|
||
if (NeedsScriptTraverse(node)) {
|
||
// Gray nodes need real CC traverse.
|
||
grayNodes.AppendElement(node);
|
||
} else if (node->IsPurple()) {
|
||
nodesToUnpurple.AppendElement(node);
|
||
}
|
||
}
|
||
|
||
root->SetCCMarkedRoot(true);
|
||
root->SetInCCBlackTree(foundLiveWrapper);
|
||
gCCBlackMarkedNodes->Insert(root);
|
||
|
||
if (!foundLiveWrapper) {
|
||
return false;
|
||
}
|
||
|
||
if (currentDoc) {
|
||
// Special case documents. If we know the document is known-live,
|
||
// we can mark the document to be in CCGeneration.
|
||
currentDoc->MarkUncollectableForCCGeneration(
|
||
nsCCUncollectableMarker::sGeneration);
|
||
} else {
|
||
for (uint32_t i = 0; i < grayNodes.Length(); ++i) {
|
||
nsINode* node = grayNodes[i];
|
||
node->SetInCCBlackTree(true);
|
||
gCCBlackMarkedNodes->Insert(node);
|
||
}
|
||
}
|
||
|
||
// Subtree is known-live, we can remove non-gray purple nodes from
|
||
// purple buffer.
|
||
for (uint32_t i = 0; i < nodesToUnpurple.Length(); ++i) {
|
||
nsIContent* purple = nodesToUnpurple[i];
|
||
// Can't remove currently handled purple node.
|
||
if (purple != aNode) {
|
||
purple->RemovePurple();
|
||
}
|
||
}
|
||
return !NeedsScriptTraverse(aNode);
|
||
}
|
||
|
||
AutoTArray<nsINode*, 1020>* gPurpleRoots = nullptr;
|
||
AutoTArray<nsIContent*, 1020>* gNodesToUnbind = nullptr;
|
||
|
||
void ClearCycleCollectorCleanupData() {
|
||
if (gPurpleRoots) {
|
||
uint32_t len = gPurpleRoots->Length();
|
||
for (uint32_t i = 0; i < len; ++i) {
|
||
nsINode* n = gPurpleRoots->ElementAt(i);
|
||
n->SetIsPurpleRoot(false);
|
||
}
|
||
delete gPurpleRoots;
|
||
gPurpleRoots = nullptr;
|
||
}
|
||
if (gNodesToUnbind) {
|
||
uint32_t len = gNodesToUnbind->Length();
|
||
for (uint32_t i = 0; i < len; ++i) {
|
||
nsIContent* c = gNodesToUnbind->ElementAt(i);
|
||
c->SetIsPurpleRoot(false);
|
||
ContentUnbinder::Append(c);
|
||
}
|
||
delete gNodesToUnbind;
|
||
gNodesToUnbind = nullptr;
|
||
}
|
||
}
|
||
|
||
static bool ShouldClearPurple(nsIContent* aContent) {
|
||
MOZ_ASSERT(aContent);
|
||
if (aContent->IsPurple()) {
|
||
return true;
|
||
}
|
||
|
||
JSObject* o = GetJSObjectChild(aContent);
|
||
if (o && JS::ObjectIsMarkedGray(o)) {
|
||
return true;
|
||
}
|
||
|
||
if (aContent->HasListenerManager()) {
|
||
return true;
|
||
}
|
||
|
||
return aContent->HasProperties();
|
||
}
|
||
|
||
// If aNode is not optimizable, but is an element
|
||
// with a frame in a document which has currently active presshell,
|
||
// we can act as if it was optimizable. When the primary frame dies, aNode
|
||
// will end up to the purple buffer because of the refcount change.
|
||
bool NodeHasActiveFrame(Document* aCurrentDoc, nsINode* aNode) {
|
||
return aCurrentDoc->GetPresShell() && aNode->IsElement() &&
|
||
aNode->AsElement()->GetPrimaryFrame();
|
||
}
|
||
|
||
// CanSkip checks if aNode is known-live, and if it is, returns true. If aNode
|
||
// is in a known-live DOM tree, CanSkip may also remove other objects from
|
||
// purple buffer and unmark event listeners and user data. If the root of the
|
||
// DOM tree is a document, less optimizations are done since checking the
|
||
// liveness of the current document is usually fast and we don't want slow down
|
||
// such common cases.
|
||
bool FragmentOrElement::CanSkip(nsINode* aNode, bool aRemovingAllowed) {
|
||
// Don't try to optimize anything during shutdown.
|
||
if (nsCCUncollectableMarker::sGeneration == 0) {
|
||
return false;
|
||
}
|
||
|
||
bool unoptimizable = aNode->UnoptimizableCCNode();
|
||
Document* currentDoc = aNode->GetComposedDoc();
|
||
if (currentDoc && IsCertainlyAliveNode(aNode, currentDoc) &&
|
||
(!unoptimizable || NodeHasActiveFrame(currentDoc, aNode))) {
|
||
MarkNodeChildren(aNode);
|
||
return true;
|
||
}
|
||
|
||
if (unoptimizable) {
|
||
return false;
|
||
}
|
||
|
||
nsINode* root = currentDoc ? static_cast<nsINode*>(currentDoc)
|
||
: FindOptimizableSubtreeRoot(aNode);
|
||
if (!root) {
|
||
return false;
|
||
}
|
||
|
||
// Subtree has been traversed already, and aNode has
|
||
// been handled in a way that doesn't require revisiting it.
|
||
if (root->IsPurpleRoot()) {
|
||
return false;
|
||
}
|
||
|
||
// nodesToClear contains nodes which are either purple or
|
||
// gray.
|
||
AutoTArray<nsIContent*, 1020> nodesToClear;
|
||
|
||
bool foundLiveWrapper = root->HasKnownLiveWrapper();
|
||
bool domOnlyCycle = false;
|
||
if (root != currentDoc) {
|
||
currentDoc = nullptr;
|
||
if (!foundLiveWrapper) {
|
||
domOnlyCycle = static_cast<nsIContent*>(root)->OwnedOnlyByTheDOMTree();
|
||
}
|
||
if (ShouldClearPurple(static_cast<nsIContent*>(root))) {
|
||
nodesToClear.AppendElement(static_cast<nsIContent*>(root));
|
||
}
|
||
}
|
||
|
||
// Traverse the subtree and check if we could know without CC
|
||
// that it is known-live.
|
||
// Note, this traverse is non-virtual and inline, so it should be a lot faster
|
||
// than CC's generic traverse.
|
||
for (nsIContent* node = root->GetFirstChild(); node;
|
||
node = node->GetNextNode(root)) {
|
||
foundLiveWrapper = foundLiveWrapper || node->HasKnownLiveWrapper();
|
||
if (foundLiveWrapper) {
|
||
domOnlyCycle = false;
|
||
if (currentDoc) {
|
||
// If we can mark the whole document live, no need to optimize
|
||
// so much, since when the next purple node in the document will be
|
||
// handled, it is fast to check that the currentDoc is in CCGeneration.
|
||
break;
|
||
}
|
||
// No need to put stuff to the nodesToClear array, if we can clear it
|
||
// already here.
|
||
if (node->IsPurple() && (node != aNode || aRemovingAllowed)) {
|
||
node->RemovePurple();
|
||
}
|
||
MarkNodeChildren(node);
|
||
} else {
|
||
domOnlyCycle = domOnlyCycle && node->OwnedOnlyByTheDOMTree();
|
||
if (ShouldClearPurple(node)) {
|
||
// Collect interesting nodes which we can clear if we find that
|
||
// they are kept alive in a known-live tree or are in a DOM-only cycle.
|
||
nodesToClear.AppendElement(node);
|
||
}
|
||
}
|
||
}
|
||
|
||
if (!currentDoc || !foundLiveWrapper) {
|
||
root->SetIsPurpleRoot(true);
|
||
if (domOnlyCycle) {
|
||
if (!gNodesToUnbind) {
|
||
gNodesToUnbind = new AutoTArray<nsIContent*, 1020>();
|
||
}
|
||
gNodesToUnbind->AppendElement(static_cast<nsIContent*>(root));
|
||
for (uint32_t i = 0; i < nodesToClear.Length(); ++i) {
|
||
nsIContent* n = nodesToClear[i];
|
||
if ((n != aNode || aRemovingAllowed) && n->IsPurple()) {
|
||
n->RemovePurple();
|
||
}
|
||
}
|
||
return true;
|
||
} else {
|
||
if (!gPurpleRoots) {
|
||
gPurpleRoots = new AutoTArray<nsINode*, 1020>();
|
||
}
|
||
gPurpleRoots->AppendElement(root);
|
||
}
|
||
}
|
||
|
||
if (!foundLiveWrapper) {
|
||
return false;
|
||
}
|
||
|
||
if (currentDoc) {
|
||
// Special case documents. If we know the document is known-live,
|
||
// we can mark the document to be in CCGeneration.
|
||
currentDoc->MarkUncollectableForCCGeneration(
|
||
nsCCUncollectableMarker::sGeneration);
|
||
MarkNodeChildren(currentDoc);
|
||
}
|
||
|
||
// Subtree is known-live, so we can remove purple nodes from
|
||
// purple buffer and mark stuff that to be certainly alive.
|
||
for (uint32_t i = 0; i < nodesToClear.Length(); ++i) {
|
||
nsIContent* n = nodesToClear[i];
|
||
MarkNodeChildren(n);
|
||
// Can't remove currently handled purple node,
|
||
// unless aRemovingAllowed is true.
|
||
if ((n != aNode || aRemovingAllowed) && n->IsPurple()) {
|
||
n->RemovePurple();
|
||
}
|
||
}
|
||
return true;
|
||
}
|
||
|
||
bool FragmentOrElement::CanSkipThis(nsINode* aNode) {
|
||
if (nsCCUncollectableMarker::sGeneration == 0) {
|
||
return false;
|
||
}
|
||
if (aNode->HasKnownLiveWrapper()) {
|
||
return true;
|
||
}
|
||
Document* c = aNode->GetComposedDoc();
|
||
return ((c && IsCertainlyAliveNode(aNode, c)) || aNode->InCCBlackTree()) &&
|
||
!NeedsScriptTraverse(aNode);
|
||
}
|
||
|
||
void FragmentOrElement::InitCCCallbacks() {
|
||
nsCycleCollector_setForgetSkippableCallback(ClearCycleCollectorCleanupData);
|
||
nsCycleCollector_setBeforeUnlinkCallback(ClearBlackMarkedNodes);
|
||
}
|
||
|
||
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_BEGIN(FragmentOrElement)
|
||
return FragmentOrElement::CanSkip(tmp, aRemovingAllowed);
|
||
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_END
|
||
|
||
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_BEGIN(FragmentOrElement)
|
||
return FragmentOrElement::CanSkipInCC(tmp);
|
||
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_END
|
||
|
||
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_BEGIN(FragmentOrElement)
|
||
return FragmentOrElement::CanSkipThis(tmp);
|
||
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_END
|
||
|
||
// We purposefully don't TRAVERSE_BEGIN_INHERITED here. All the bits
|
||
// we should traverse should be added here or in nsINode::Traverse.
|
||
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INTERNAL(FragmentOrElement)
|
||
if (MOZ_UNLIKELY(cb.WantDebugInfo())) {
|
||
char name[512];
|
||
uint32_t nsid = tmp->GetNameSpaceID();
|
||
nsAtomCString localName(tmp->NodeInfo()->NameAtom());
|
||
nsAutoCString uri;
|
||
if (tmp->OwnerDoc()->GetDocumentURI()) {
|
||
uri = tmp->OwnerDoc()->GetDocumentURI()->GetSpecOrDefault();
|
||
}
|
||
|
||
nsAutoString id;
|
||
nsAtom* idAtom = tmp->GetID();
|
||
if (idAtom) {
|
||
id.AppendLiteral(" id='");
|
||
id.Append(nsDependentAtomString(idAtom));
|
||
id.Append('\'');
|
||
}
|
||
|
||
nsAutoString classes;
|
||
const nsAttrValue* classAttrValue =
|
||
tmp->IsElement() ? tmp->AsElement()->GetClasses() : nullptr;
|
||
if (classAttrValue) {
|
||
classes.AppendLiteral(" class='");
|
||
nsAutoString classString;
|
||
classAttrValue->ToString(classString);
|
||
classString.ReplaceChar(char16_t('\n'), char16_t(' '));
|
||
classes.Append(classString);
|
||
classes.Append('\'');
|
||
}
|
||
|
||
nsAutoCString orphan;
|
||
if (!tmp->IsInComposedDoc()) {
|
||
orphan.AppendLiteral(" (orphan)");
|
||
}
|
||
|
||
const char* nsuri = nsNameSpaceManager::GetNameSpaceDisplayName(nsid);
|
||
SprintfLiteral(name, "FragmentOrElement %s %s%s%s%s %s", nsuri,
|
||
localName.get(), NS_ConvertUTF16toUTF8(id).get(),
|
||
NS_ConvertUTF16toUTF8(classes).get(), orphan.get(),
|
||
uri.get());
|
||
cb.DescribeRefCountedNode(tmp->mRefCnt.get(), name);
|
||
} else {
|
||
NS_IMPL_CYCLE_COLLECTION_DESCRIBE(FragmentOrElement, tmp->mRefCnt.get())
|
||
}
|
||
|
||
if (!nsIContent::Traverse(tmp, cb)) {
|
||
return NS_SUCCESS_INTERRUPTED_TRAVERSE;
|
||
}
|
||
|
||
if (tmp->HasProperties()) {
|
||
if (tmp->IsElement()) {
|
||
Element* elem = tmp->AsElement();
|
||
IntersectionObserverList* observers =
|
||
static_cast<IntersectionObserverList*>(
|
||
elem->GetProperty(nsGkAtoms::intersectionobserverlist));
|
||
if (observers) {
|
||
for (DOMIntersectionObserver* observer : observers->Keys()) {
|
||
cb.NoteXPCOMChild(observer);
|
||
}
|
||
}
|
||
}
|
||
if (tmp->IsHTMLElement() || tmp->IsSVGElement()) {
|
||
nsStaticAtom* const* props =
|
||
Element::HTMLSVGPropertiesToTraverseAndUnlink();
|
||
for (uint32_t i = 0; props[i]; ++i) {
|
||
nsISupports* property =
|
||
static_cast<nsISupports*>(tmp->GetProperty(props[i]));
|
||
cb.NoteXPCOMChild(property);
|
||
}
|
||
}
|
||
}
|
||
if (tmp->IsElement()) {
|
||
Element* element = tmp->AsElement();
|
||
// Traverse attribute names.
|
||
uint32_t i;
|
||
uint32_t attrs = element->GetAttrCount();
|
||
for (i = 0; i < attrs; i++) {
|
||
const nsAttrName* name = element->GetUnsafeAttrNameAt(i);
|
||
if (!name->IsAtom()) {
|
||
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mAttrs[i]->NodeInfo()");
|
||
cb.NoteNativeChild(name->NodeInfo(),
|
||
NS_CYCLE_COLLECTION_PARTICIPANT(NodeInfo));
|
||
}
|
||
}
|
||
}
|
||
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
|
||
|
||
NS_INTERFACE_MAP_BEGIN(FragmentOrElement)
|
||
NS_INTERFACE_MAP_ENTRIES_CYCLE_COLLECTION(FragmentOrElement)
|
||
NS_INTERFACE_MAP_END_INHERITING(nsIContent)
|
||
|
||
//----------------------------------------------------------------------
|
||
|
||
const nsTextFragment* FragmentOrElement::GetText() { return nullptr; }
|
||
|
||
uint32_t FragmentOrElement::TextLength() const {
|
||
// We can remove this assertion if it turns out to be useful to be able
|
||
// to depend on this returning 0
|
||
MOZ_ASSERT_UNREACHABLE("called FragmentOrElement::TextLength");
|
||
|
||
return 0;
|
||
}
|
||
|
||
bool FragmentOrElement::TextIsOnlyWhitespace() { return false; }
|
||
|
||
bool FragmentOrElement::ThreadSafeTextIsOnlyWhitespace() const { return false; }
|
||
|
||
static inline bool IsVoidTag(nsAtom* aTag) {
|
||
static const nsAtom* voidElements[] = {
|
||
nsGkAtoms::area, nsGkAtoms::base, nsGkAtoms::basefont,
|
||
nsGkAtoms::bgsound, nsGkAtoms::br, nsGkAtoms::col,
|
||
nsGkAtoms::embed, nsGkAtoms::frame, nsGkAtoms::hr,
|
||
nsGkAtoms::img, nsGkAtoms::input, nsGkAtoms::keygen,
|
||
nsGkAtoms::link, nsGkAtoms::meta, nsGkAtoms::param,
|
||
nsGkAtoms::source, nsGkAtoms::track, nsGkAtoms::wbr};
|
||
|
||
static mozilla::BitBloomFilter<12, nsAtom> sFilter;
|
||
static bool sInitialized = false;
|
||
if (!sInitialized) {
|
||
sInitialized = true;
|
||
for (uint32_t i = 0; i < ArrayLength(voidElements); ++i) {
|
||
sFilter.add(voidElements[i]);
|
||
}
|
||
}
|
||
|
||
if (sFilter.mightContain(aTag)) {
|
||
for (uint32_t i = 0; i < ArrayLength(voidElements); ++i) {
|
||
if (aTag == voidElements[i]) {
|
||
return true;
|
||
}
|
||
}
|
||
}
|
||
return false;
|
||
}
|
||
|
||
/* static */
|
||
bool FragmentOrElement::IsHTMLVoid(nsAtom* aLocalName) {
|
||
return aLocalName && IsVoidTag(aLocalName);
|
||
}
|
||
|
||
void FragmentOrElement::GetMarkup(bool aIncludeSelf, nsAString& aMarkup) {
|
||
aMarkup.Truncate();
|
||
|
||
Document* doc = OwnerDoc();
|
||
if (IsInHTMLDocument()) {
|
||
nsContentUtils::SerializeNodeToMarkup(this, !aIncludeSelf, aMarkup);
|
||
return;
|
||
}
|
||
|
||
nsAutoString contentType;
|
||
doc->GetContentType(contentType);
|
||
bool tryToCacheEncoder = !aIncludeSelf;
|
||
|
||
nsCOMPtr<nsIDocumentEncoder> docEncoder = doc->GetCachedEncoder();
|
||
if (!docEncoder) {
|
||
docEncoder = do_createDocumentEncoder(
|
||
PromiseFlatCString(NS_ConvertUTF16toUTF8(contentType)).get());
|
||
}
|
||
if (!docEncoder) {
|
||
// This could be some type for which we create a synthetic document. Try
|
||
// again as XML
|
||
contentType.AssignLiteral("application/xml");
|
||
docEncoder = do_createDocumentEncoder("application/xml");
|
||
// Don't try to cache the encoder since it would point to a different
|
||
// contentType once it has been reinitialized.
|
||
tryToCacheEncoder = false;
|
||
}
|
||
|
||
NS_ENSURE_TRUE_VOID(docEncoder);
|
||
|
||
uint32_t flags = nsIDocumentEncoder::OutputEncodeBasicEntities |
|
||
// Output DOM-standard newlines
|
||
nsIDocumentEncoder::OutputLFLineBreak |
|
||
// Don't do linebreaking that's not present in
|
||
// the source
|
||
nsIDocumentEncoder::OutputRaw |
|
||
// Only check for mozdirty when necessary (bug 599983)
|
||
nsIDocumentEncoder::OutputIgnoreMozDirty;
|
||
|
||
if (IsEditable()) {
|
||
nsCOMPtr<Element> elem = do_QueryInterface(this);
|
||
TextEditor* textEditor = elem ? elem->GetTextEditorInternal() : nullptr;
|
||
if (textEditor && textEditor->OutputsMozDirty()) {
|
||
flags &= ~nsIDocumentEncoder::OutputIgnoreMozDirty;
|
||
}
|
||
}
|
||
|
||
DebugOnly<nsresult> rv = docEncoder->NativeInit(doc, contentType, flags);
|
||
MOZ_ASSERT(NS_SUCCEEDED(rv));
|
||
|
||
if (aIncludeSelf) {
|
||
docEncoder->SetNode(this);
|
||
} else {
|
||
docEncoder->SetContainerNode(this);
|
||
}
|
||
rv = docEncoder->EncodeToString(aMarkup);
|
||
MOZ_ASSERT(NS_SUCCEEDED(rv));
|
||
if (tryToCacheEncoder) {
|
||
doc->SetCachedEncoder(docEncoder.forget());
|
||
}
|
||
}
|
||
|
||
static bool ContainsMarkup(const nsAString& aStr) {
|
||
// Note: we can't use FindCharInSet because null is one of the characters we
|
||
// want to search for.
|
||
const char16_t* start = aStr.BeginReading();
|
||
const char16_t* end = aStr.EndReading();
|
||
|
||
while (start != end) {
|
||
char16_t c = *start;
|
||
if (c == char16_t('<') || c == char16_t('&') || c == char16_t('\r') ||
|
||
c == char16_t('\0')) {
|
||
return true;
|
||
}
|
||
++start;
|
||
}
|
||
|
||
return false;
|
||
}
|
||
|
||
void FragmentOrElement::SetInnerHTMLInternal(const nsAString& aInnerHTML,
|
||
ErrorResult& aError) {
|
||
// Keep "this" alive should be guaranteed by the caller, and also the content
|
||
// of a template element (if this is one) should never been released by from
|
||
// this during this call. Therefore, using raw pointer here is safe.
|
||
FragmentOrElement* target = this;
|
||
// Handle template case.
|
||
if (target->IsTemplateElement()) {
|
||
DocumentFragment* frag =
|
||
static_cast<HTMLTemplateElement*>(target)->Content();
|
||
MOZ_ASSERT(frag);
|
||
target = frag;
|
||
}
|
||
// Fast-path for strings with no markup. Limit this to short strings, to
|
||
// avoid ContainsMarkup taking too long. The choice for 100 is based on
|
||
// gut feeling.
|
||
//
|
||
// Don't do this for elements with a weird parser insertion mode, for
|
||
// instance setting innerHTML = "" on a <html> element should add the
|
||
// optional <head> and <body> elements.
|
||
if (!target->HasWeirdParserInsertionMode() && aInnerHTML.Length() < 100 &&
|
||
!ContainsMarkup(aInnerHTML)) {
|
||
aError = nsContentUtils::SetNodeTextContent(target, aInnerHTML, false);
|
||
return;
|
||
}
|
||
|
||
// mozAutoSubtreeModified keeps the owner document alive. Therefore, using a
|
||
// raw pointer here is safe.
|
||
Document* const doc = target->OwnerDoc();
|
||
|
||
// Batch possible DOMSubtreeModified events.
|
||
mozAutoSubtreeModified subtree(doc, nullptr);
|
||
|
||
target->FireNodeRemovedForChildren();
|
||
|
||
// Needed when innerHTML is used in combination with contenteditable
|
||
mozAutoDocUpdate updateBatch(doc, true);
|
||
|
||
// Remove childnodes.
|
||
nsAutoMutationBatch mb(target, true, false);
|
||
while (target->HasChildren()) {
|
||
target->RemoveChildNode(target->GetFirstChild(), true);
|
||
}
|
||
mb.RemovalDone();
|
||
|
||
nsAutoScriptLoaderDisabler sld(doc);
|
||
|
||
FragmentOrElement* parseContext = this;
|
||
if (ShadowRoot* shadowRoot = ShadowRoot::FromNode(this)) {
|
||
// Fix up the context to be the host of the ShadowRoot. See
|
||
// https://w3c.github.io/DOM-Parsing/#dom-innerhtml-innerhtml setter step 1.
|
||
parseContext = shadowRoot->GetHost();
|
||
}
|
||
|
||
if (doc->IsHTMLDocument()) {
|
||
nsAtom* contextLocalName = parseContext->NodeInfo()->NameAtom();
|
||
int32_t contextNameSpaceID = parseContext->GetNameSpaceID();
|
||
|
||
int32_t oldChildCount = target->GetChildCount();
|
||
aError = nsContentUtils::ParseFragmentHTML(
|
||
aInnerHTML, target, contextLocalName, contextNameSpaceID,
|
||
doc->GetCompatibilityMode() == eCompatibility_NavQuirks, true);
|
||
mb.NodesAdded();
|
||
// HTML5 parser has notified, but not fired mutation events.
|
||
nsContentUtils::FireMutationEventsForDirectParsing(doc, target,
|
||
oldChildCount);
|
||
} else {
|
||
RefPtr<DocumentFragment> df = nsContentUtils::CreateContextualFragment(
|
||
parseContext, aInnerHTML, true, aError);
|
||
if (!aError.Failed()) {
|
||
// 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;
|
||
|
||
target->AppendChild(*df, aError);
|
||
mb.NodesAdded();
|
||
}
|
||
}
|
||
}
|
||
|
||
void FragmentOrElement::AddSizeOfExcludingThis(nsWindowSizes& aSizes,
|
||
size_t* aNodeSize) const {
|
||
nsIContent::AddSizeOfExcludingThis(aSizes, aNodeSize);
|
||
|
||
nsDOMSlots* slots = GetExistingDOMSlots();
|
||
if (slots) {
|
||
*aNodeSize += slots->SizeOfIncludingThis(aSizes.mState.mMallocSizeOf);
|
||
}
|
||
}
|