mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-10-30 21:55:31 +00:00
60ba3c835d
MozReview-Commit-ID: 573o5vmC81z --HG-- extra : source : c284764640e86b9bf63f976b79aa66252f8b635d
2395 lines
70 KiB
C++
2395 lines
70 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 nsIDOMElement, implements nsIContent, provides
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* utility methods for subclasses, and so forth.
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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 "mozilla/AsyncEventDispatcher.h"
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#include "mozilla/DeclarationBlockInlines.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/EventStates.h"
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#include "mozilla/dom/Attr.h"
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#include "nsDOMAttributeMap.h"
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#include "nsIAtom.h"
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#include "mozilla/dom/NodeInfo.h"
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#include "mozilla/dom/Event.h"
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#include "nsIDocumentInlines.h"
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#include "nsIDocumentEncoder.h"
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#include "nsIDOMNodeList.h"
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#include "nsIContentIterator.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 "nsNetUtil.h"
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#include "nsIFrame.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 "nsIDOMEvent.h"
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#include "nsDOMCID.h"
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#include "nsIServiceManager.h"
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#include "nsIDOMCSSStyleDeclaration.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 "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 "nsIDOMMutationEvent.h"
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#include "mozilla/InternalMutationEvent.h"
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#include "mozilla/MouseEvents.h"
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#include "nsNodeUtils.h"
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#include "nsDocument.h"
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#include "nsAttrValueOrString.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 "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 "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 "nsTextFragment.h"
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#include "nsContentCID.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 "js/GCAPI.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 "nsIEditor.h"
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#include "nsIEditorIMESupport.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 "ChildIterator.h"
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#include "mozilla/css/StyleRule.h" /* For nsCSSSelectorList */
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#include "nsRuleProcessorData.h"
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#include "nsTextNode.h"
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#include "mozilla/dom/NodeListBinding.h"
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#ifdef MOZ_XUL
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#include "nsIXULDocument.h"
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#endif /* MOZ_XUL */
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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 "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/HTMLTemplateElement.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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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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nsIContent*
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nsIContent::FindFirstNonChromeOnlyAccessContent() const
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{
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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->GetBindingParent()) {
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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 GetChildAt(0)->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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nsINode*
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nsIContent::GetFlattenedTreeParentNodeInternal() const
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{
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nsINode* parentNode = GetParentNode();
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if (!parentNode || !parentNode->IsContent()) {
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MOZ_ASSERT(!parentNode || parentNode == OwnerDoc());
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return parentNode;
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}
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nsIContent* parent = parentNode->AsContent();
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if (parent && nsContentUtils::HasDistributedChildren(parent) &&
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nsContentUtils::IsInSameAnonymousTree(parent, this)) {
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// This node is distributed to insertion points, thus we
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// need to consult the destination insertion points list to
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// figure out where this node was inserted in the flattened tree.
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// It may be the case that |parent| distributes its children
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// but the child does not match any insertion points, thus
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// the flattened tree parent is nullptr.
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nsTArray<nsIContent*>* destInsertionPoints = GetExistingDestInsertionPoints();
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parent = destInsertionPoints && !destInsertionPoints->IsEmpty() ?
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destInsertionPoints->LastElement()->GetParent() : nullptr;
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} else if (HasFlag(NODE_MAY_BE_IN_BINDING_MNGR)) {
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nsIContent* insertionParent = GetXBLInsertionParent();
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if (insertionParent) {
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parent = insertionParent;
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}
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}
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// Shadow roots never shows up in the flattened tree. Return the host
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// instead.
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if (parent && parent->IsInShadowTree()) {
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ShadowRoot* parentShadowRoot = ShadowRoot::FromNode(parent);
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if (parentShadowRoot) {
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return parentShadowRoot->GetHost();
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}
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}
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return parent;
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}
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nsIContent::IMEState
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nsIContent::GetDesiredIMEState()
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{
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if (!IsEditableInternal()) {
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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(NS_EVENT_STATE_MOZ_READWRITE)) {
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return IMEState(IMEState::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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nsIDocument* doc = GetComposedDoc();
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if (!doc) {
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return IMEState(IMEState::DISABLED);
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}
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nsIPresShell* ps = doc->GetShell();
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if (!ps) {
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return IMEState(IMEState::DISABLED);
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}
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nsPresContext* pc = ps->GetPresContext();
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if (!pc) {
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return IMEState(IMEState::DISABLED);
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}
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nsIEditor* editor = nsContentUtils::GetHTMLEditor(pc);
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nsCOMPtr<nsIEditorIMESupport> imeEditor = do_QueryInterface(editor);
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if (!imeEditor) {
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return IMEState(IMEState::DISABLED);
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}
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IMEState state;
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imeEditor->GetPreferredIMEState(&state);
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return state;
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}
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bool
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nsIContent::HasIndependentSelection()
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{
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nsIFrame* frame = GetPrimaryFrame();
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return (frame && frame->GetStateBits() & NS_FRAME_INDEPENDENT_SELECTION);
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}
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dom::Element*
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nsIContent::GetEditingHost()
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{
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// If this isn't editable, return nullptr.
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if (!IsEditableInternal()) {
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return nullptr;
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}
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nsIDocument* 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 (doc->HasFlag(NODE_IS_EDITABLE) && !IsInShadowTree()) {
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return doc->GetBodyElement();
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}
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nsIContent* content = this;
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for (dom::Element* parent = GetParentElement();
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parent && parent->HasFlag(NODE_IS_EDITABLE);
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parent = content->GetParentElement()) {
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content = parent;
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}
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return content->AsElement();
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}
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nsresult
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nsIContent::LookupNamespaceURIInternal(const nsAString& aNamespacePrefix,
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nsAString& aNamespaceURI) const
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{
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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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nsCOMPtr<nsIAtom> 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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}
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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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const nsIContent* content = this;
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do {
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if (content->GetAttr(kNameSpaceID_XMLNS, name, aNamespaceURI))
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return NS_OK;
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} while ((content = content->GetParent()));
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return NS_ERROR_FAILURE;
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}
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already_AddRefed<nsIURI>
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nsIContent::GetBaseURI(bool aTryUseXHRDocBaseURI) const
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{
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nsIDocument* doc = OwnerDoc();
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// Start with document base
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nsCOMPtr<nsIURI> base = doc->GetBaseURI(aTryUseXHRDocBaseURI);
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// Collect array of xml:base attribute values up the parent chain. This
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// is slightly slower for the case when there are xml:base attributes, but
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// faster for the far more common case of there not being any such
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// attributes.
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// Also check for SVG elements which require special handling
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AutoTArray<nsString, 5> baseAttrs;
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nsString attr;
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const nsIContent *elem = this;
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do {
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// First check for SVG specialness (why is this SVG specific?)
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if (elem->IsSVGElement()) {
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nsIContent* bindingParent = elem->GetBindingParent();
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if (bindingParent) {
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nsXBLBinding* binding = bindingParent->GetXBLBinding();
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if (binding) {
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// XXX sXBL/XBL2 issue
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// If this is an anonymous XBL element use the binding
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// document for the base URI.
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// XXX Will fail with xml:base
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base = binding->PrototypeBinding()->DocURI();
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break;
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}
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}
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}
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nsIURI* explicitBaseURI = elem->GetExplicitBaseURI();
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if (explicitBaseURI) {
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base = explicitBaseURI;
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break;
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}
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// Otherwise check for xml:base attribute
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elem->GetAttr(kNameSpaceID_XML, nsGkAtoms::base, attr);
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if (!attr.IsEmpty()) {
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baseAttrs.AppendElement(attr);
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}
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elem = elem->GetParent();
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} while(elem);
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// Now resolve against all xml:base attrs
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for (uint32_t i = baseAttrs.Length() - 1; i != uint32_t(-1); --i) {
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nsCOMPtr<nsIURI> newBase;
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nsresult rv = NS_NewURI(getter_AddRefs(newBase), baseAttrs[i],
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doc->GetDocumentCharacterSet().get(), base);
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// Do a security check, almost the same as nsDocument::SetBaseURL()
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// Only need to do this on the final uri
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if (NS_SUCCEEDED(rv) && i == 0) {
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rv = nsContentUtils::GetSecurityManager()->
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CheckLoadURIWithPrincipal(NodePrincipal(), newBase,
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nsIScriptSecurityManager::STANDARD);
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}
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if (NS_SUCCEEDED(rv)) {
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base.swap(newBase);
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}
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}
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return base.forget();
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}
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//----------------------------------------------------------------------
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static inline JSObject*
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GetJSObjectChild(nsWrapperCache* aCache)
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{
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return aCache->PreservingWrapper() ? aCache->GetWrapperPreserveColor() : nullptr;
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}
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static bool
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NeedsScriptTraverse(nsINode* aNode)
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{
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return aNode->PreservingWrapper() && aNode->GetWrapperPreserveColor() &&
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!aNode->IsBlackAndDoesNotNeedTracing(aNode);
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}
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//----------------------------------------------------------------------
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NS_IMPL_CYCLE_COLLECTING_ADDREF(nsChildContentList)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(nsChildContentList)
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// If nsChildContentList is changed so that any additional fields are
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// traversed by the cycle collector, then CAN_SKIP must be updated to
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// check that the additional fields are null.
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NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_0(nsChildContentList)
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// nsChildContentList only ever has a single child, its wrapper, so if
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// the wrapper is black, the list can't be part of a garbage cycle.
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NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_BEGIN(nsChildContentList)
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return tmp->IsBlack();
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NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_END
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NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_BEGIN(nsChildContentList)
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return tmp->IsBlackAndDoesNotNeedTracing(tmp);
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NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_END
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// CanSkipThis returns false to avoid problems with incomplete unlinking.
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NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_BEGIN(nsChildContentList)
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NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_END
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NS_INTERFACE_TABLE_HEAD(nsChildContentList)
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NS_WRAPPERCACHE_INTERFACE_TABLE_ENTRY
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NS_INTERFACE_TABLE(nsChildContentList, nsINodeList, nsIDOMNodeList)
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NS_INTERFACE_TABLE_TO_MAP_SEGUE_CYCLE_COLLECTION(nsChildContentList)
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NS_INTERFACE_MAP_END
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JSObject*
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nsChildContentList::WrapObject(JSContext *cx, JS::Handle<JSObject*> aGivenProto)
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{
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return NodeListBinding::Wrap(cx, this, aGivenProto);
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}
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NS_IMETHODIMP
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nsChildContentList::GetLength(uint32_t* aLength)
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{
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*aLength = mNode ? mNode->GetChildCount() : 0;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsChildContentList::Item(uint32_t aIndex, nsIDOMNode** aReturn)
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{
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nsINode* node = Item(aIndex);
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if (!node) {
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*aReturn = nullptr;
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return NS_OK;
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}
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return CallQueryInterface(node, aReturn);
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}
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nsIContent*
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nsChildContentList::Item(uint32_t aIndex)
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{
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if (mNode) {
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return mNode->GetChildAt(aIndex);
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}
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return nullptr;
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}
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int32_t
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nsChildContentList::IndexOf(nsIContent* aContent)
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{
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if (mNode) {
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return mNode->IndexOf(aContent);
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}
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return -1;
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}
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//----------------------------------------------------------------------
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nsIHTMLCollection*
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FragmentOrElement::Children()
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{
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|
FragmentOrElement::nsDOMSlots *slots = DOMSlots();
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if (!slots->mChildrenList) {
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|
slots->mChildrenList = new nsContentList(this, kNameSpaceID_Wildcard,
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nsGkAtoms::_asterisk, nsGkAtoms::_asterisk,
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false);
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}
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return slots->mChildrenList;
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}
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//----------------------------------------------------------------------
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NS_IMPL_ISUPPORTS(nsNodeWeakReference,
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nsIWeakReference)
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nsNodeWeakReference::~nsNodeWeakReference()
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|
{
|
|
if (mNode) {
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NS_ASSERTION(mNode->Slots()->mWeakReference == this,
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"Weak reference has wrong value");
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mNode->Slots()->mWeakReference = nullptr;
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}
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}
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NS_IMETHODIMP
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nsNodeWeakReference::QueryReferent(const nsIID& aIID, void** aInstancePtr)
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{
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return mNode ? mNode->QueryInterface(aIID, aInstancePtr) :
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NS_ERROR_NULL_POINTER;
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}
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size_t
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nsNodeWeakReference::SizeOfOnlyThis(mozilla::MallocSizeOf aMallocSizeOf) const
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{
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return aMallocSizeOf(this);
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}
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|
|
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;
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
FragmentOrElement::nsDOMSlots::nsDOMSlots()
|
|
: nsINode::nsSlots(),
|
|
mDataset(nullptr),
|
|
mBindingParent(nullptr)
|
|
{
|
|
}
|
|
|
|
FragmentOrElement::nsDOMSlots::~nsDOMSlots()
|
|
{
|
|
if (mAttributeMap) {
|
|
mAttributeMap->DropReference();
|
|
}
|
|
}
|
|
|
|
void
|
|
FragmentOrElement::nsDOMSlots::Traverse(nsCycleCollectionTraversalCallback &cb, bool aIsXUL)
|
|
{
|
|
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mSlots->mStyle");
|
|
cb.NoteXPCOMChild(mStyle.get());
|
|
|
|
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mSlots->mSMILOverrideStyle");
|
|
cb.NoteXPCOMChild(mSMILOverrideStyle.get());
|
|
|
|
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mSlots->mAttributeMap");
|
|
cb.NoteXPCOMChild(mAttributeMap.get());
|
|
|
|
if (aIsXUL) {
|
|
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mSlots->mControllers");
|
|
cb.NoteXPCOMChild(mControllers);
|
|
}
|
|
|
|
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mSlots->mXBLBinding");
|
|
cb.NoteNativeChild(mXBLBinding, NS_CYCLE_COLLECTION_PARTICIPANT(nsXBLBinding));
|
|
|
|
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mSlots->mXBLInsertionParent");
|
|
cb.NoteXPCOMChild(mXBLInsertionParent.get());
|
|
|
|
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mSlots->mShadowRoot");
|
|
cb.NoteXPCOMChild(NS_ISUPPORTS_CAST(nsIContent*, mShadowRoot));
|
|
|
|
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mSlots->mContainingShadow");
|
|
cb.NoteXPCOMChild(NS_ISUPPORTS_CAST(nsIContent*, mContainingShadow));
|
|
|
|
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mSlots->mChildrenList");
|
|
cb.NoteXPCOMChild(NS_ISUPPORTS_CAST(nsIDOMNodeList*, mChildrenList));
|
|
|
|
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mSlots->mClassList");
|
|
cb.NoteXPCOMChild(mClassList.get());
|
|
|
|
if (mCustomElementData) {
|
|
for (uint32_t i = 0; i < mCustomElementData->mCallbackQueue.Length(); i++) {
|
|
mCustomElementData->mCallbackQueue[i]->Traverse(cb);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
FragmentOrElement::nsDOMSlots::Unlink(bool aIsXUL)
|
|
{
|
|
mStyle = nullptr;
|
|
mSMILOverrideStyle = nullptr;
|
|
if (mAttributeMap) {
|
|
mAttributeMap->DropReference();
|
|
mAttributeMap = nullptr;
|
|
}
|
|
if (aIsXUL)
|
|
NS_IF_RELEASE(mControllers);
|
|
|
|
MOZ_ASSERT(!mXBLBinding);
|
|
|
|
mXBLInsertionParent = nullptr;
|
|
mShadowRoot = nullptr;
|
|
mContainingShadow = nullptr;
|
|
mChildrenList = nullptr;
|
|
mCustomElementData = nullptr;
|
|
mClassList = nullptr;
|
|
}
|
|
|
|
size_t
|
|
FragmentOrElement::nsDOMSlots::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const
|
|
{
|
|
size_t n = aMallocSizeOf(this);
|
|
|
|
if (mAttributeMap) {
|
|
n += mAttributeMap->SizeOfIncludingThis(aMallocSizeOf);
|
|
}
|
|
|
|
// Measurement of the following members may be added later if DMD finds it is
|
|
// worthwhile:
|
|
// - Superclass members (nsINode::nsSlots)
|
|
// - mStyle
|
|
// - mDataSet
|
|
// - mSMILOverrideStyle
|
|
// - mSMILOverrideStyleDeclaration
|
|
// - mChildrenList
|
|
// - mClassList
|
|
|
|
// The following members are not measured:
|
|
// - mBindingParent / mControllers: because they're non-owning
|
|
return n;
|
|
}
|
|
|
|
FragmentOrElement::FragmentOrElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo)
|
|
: nsIContent(aNodeInfo)
|
|
{
|
|
}
|
|
|
|
FragmentOrElement::FragmentOrElement(already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
|
|
: nsIContent(aNodeInfo)
|
|
{
|
|
}
|
|
|
|
FragmentOrElement::~FragmentOrElement()
|
|
{
|
|
NS_PRECONDITION(!IsInUncomposedDoc(),
|
|
"Please remove this from the document properly");
|
|
if (GetParent()) {
|
|
NS_RELEASE(mParent);
|
|
}
|
|
}
|
|
|
|
already_AddRefed<nsINodeList>
|
|
FragmentOrElement::GetChildren(uint32_t aFilter)
|
|
{
|
|
RefPtr<nsSimpleContentList> list = new nsSimpleContentList(this);
|
|
AllChildrenIterator iter(this, aFilter);
|
|
while (nsIContent* kid = iter.GetNextChild()) {
|
|
list->AppendElement(kid);
|
|
}
|
|
|
|
return list.forget();
|
|
}
|
|
|
|
static nsIContent*
|
|
FindChromeAccessOnlySubtreeOwner(nsIContent* aContent)
|
|
{
|
|
if (aContent->ChromeOnlyAccess()) {
|
|
bool chromeAccessOnly = false;
|
|
while (aContent && !chromeAccessOnly) {
|
|
chromeAccessOnly = aContent->IsRootOfChromeAccessOnlySubtree();
|
|
aContent = aContent->GetParent();
|
|
}
|
|
}
|
|
return aContent;
|
|
}
|
|
|
|
nsresult
|
|
nsIContent::PreHandleEvent(EventChainPreVisitor& aVisitor)
|
|
{
|
|
//FIXME! Document how this event retargeting works, Bug 329124.
|
|
aVisitor.mCanHandle = true;
|
|
aVisitor.mMayHaveListenerManager = HasListenerManager();
|
|
|
|
// Don't propagate mouseover and mouseout events when mouse is moving
|
|
// inside chrome access only content.
|
|
bool isAnonForEvents = IsRootOfChromeAccessOnlySubtree();
|
|
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 || GetShadowRoot())) {
|
|
nsCOMPtr<nsIContent> relatedTarget =
|
|
do_QueryInterface(aVisitor.mEvent->AsMouseEvent()->relatedTarget);
|
|
if (relatedTarget &&
|
|
relatedTarget->OwnerDoc() == OwnerDoc()) {
|
|
|
|
// In the web components case, we may need to stop propagation of events
|
|
// at shadow root host.
|
|
if (GetShadowRoot()) {
|
|
nsIContent* adjustedTarget =
|
|
Event::GetShadowRelatedTarget(this, relatedTarget);
|
|
if (this == adjustedTarget) {
|
|
aVisitor.mParentTarget = nullptr;
|
|
aVisitor.mCanHandle = false;
|
|
return NS_OK;
|
|
}
|
|
}
|
|
|
|
// 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()))) {
|
|
nsIContent* anonOwner = FindChromeAccessOnlySubtreeOwner(this);
|
|
if (anonOwner) {
|
|
nsIContent* 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 =
|
|
do_QueryInterface(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.mParentTarget = nullptr;
|
|
// Event should not propagate to non-anon content.
|
|
aVisitor.mCanHandle = isAnonForEvents;
|
|
return NS_OK;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
nsIContent* parent = GetParent();
|
|
|
|
// Web components have a special event chain that need to account
|
|
// for destination insertion points where nodes have been distributed.
|
|
nsTArray<nsIContent*>* destPoints = GetExistingDestInsertionPoints();
|
|
if (destPoints && !destPoints->IsEmpty()) {
|
|
// Push destination insertion points to aVisitor.mDestInsertionPoints
|
|
// excluding shadow insertion points.
|
|
bool didPushNonShadowInsertionPoint = false;
|
|
for (uint32_t i = 0; i < destPoints->Length(); i++) {
|
|
nsIContent* point = destPoints->ElementAt(i);
|
|
if (!ShadowRoot::IsShadowInsertionPoint(point)) {
|
|
aVisitor.mDestInsertionPoints.AppendElement(point);
|
|
didPushNonShadowInsertionPoint = true;
|
|
}
|
|
}
|
|
|
|
// Next node in the event path is the final destination
|
|
// (non-shadow) insertion point that was pushed.
|
|
if (didPushNonShadowInsertionPoint) {
|
|
parent = aVisitor.mDestInsertionPoints.LastElement();
|
|
aVisitor.mDestInsertionPoints.SetLength(
|
|
aVisitor.mDestInsertionPoints.Length() - 1);
|
|
}
|
|
}
|
|
|
|
ShadowRoot* thisShadowRoot = ShadowRoot::FromNode(this);
|
|
if (thisShadowRoot) {
|
|
if (!aVisitor.mEvent->mFlags.mComposed) {
|
|
// If we do stop propagation, we still want to propagate
|
|
// the event to chrome (nsPIDOMWindow::GetParentTarget()).
|
|
// The load event is special in that we don't ever propagate it
|
|
// to chrome.
|
|
nsCOMPtr<nsPIDOMWindowOuter> win = OwnerDoc()->GetWindow();
|
|
EventTarget* parentTarget = win && aVisitor.mEvent->mMessage != eLoad
|
|
? win->GetParentTarget() : nullptr;
|
|
|
|
aVisitor.mParentTarget = parentTarget;
|
|
return NS_OK;
|
|
}
|
|
|
|
if (!aVisitor.mDestInsertionPoints.IsEmpty()) {
|
|
parent = aVisitor.mDestInsertionPoints.LastElement();
|
|
aVisitor.mDestInsertionPoints.SetLength(
|
|
aVisitor.mDestInsertionPoints.Length() - 1);
|
|
} else {
|
|
// The pool host for the youngest shadow root is shadow DOM host,
|
|
// for older shadow roots, it is the shadow insertion point
|
|
// where the shadow root is projected, nullptr if none exists.
|
|
parent = thisShadowRoot->GetPoolHost();
|
|
}
|
|
}
|
|
|
|
// 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 =
|
|
do_QueryInterface(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(do_QueryInterface(aVisitor.mEvent->mTarget));
|
|
if (content && content->GetBindingParent() == parent) {
|
|
aVisitor.mEventTargetAtParent = parent;
|
|
}
|
|
}
|
|
|
|
// check for an anonymous parent
|
|
// XXX XBL2/sXBL issue
|
|
if (HasFlag(NODE_MAY_BE_IN_BINDING_MNGR)) {
|
|
nsIContent* insertionParent = GetXBLInsertionParent();
|
|
NS_ASSERTION(!(aVisitor.mEventTargetAtParent && insertionParent &&
|
|
aVisitor.mEventTargetAtParent != insertionParent),
|
|
"Retargeting and having insertion parent!");
|
|
if (insertionParent) {
|
|
parent = insertionParent;
|
|
}
|
|
}
|
|
|
|
if (!aVisitor.mEvent->mFlags.mComposedInNativeAnonymousContent &&
|
|
IsRootOfNativeAnonymousSubtree() && OwnerDoc() &&
|
|
OwnerDoc()->GetWindow()) {
|
|
aVisitor.mParentTarget = OwnerDoc()->GetWindow()->GetParentTarget();
|
|
} else if (parent) {
|
|
aVisitor.mParentTarget = parent;
|
|
} else {
|
|
aVisitor.mParentTarget = GetComposedDoc();
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
bool
|
|
nsIContent::GetAttr(int32_t aNameSpaceID, nsIAtom* aName,
|
|
nsAString& aResult) const
|
|
{
|
|
if (IsElement()) {
|
|
return AsElement()->GetAttr(aNameSpaceID, aName, aResult);
|
|
}
|
|
aResult.Truncate();
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
nsIContent::HasAttr(int32_t aNameSpaceID, nsIAtom* aName) const
|
|
{
|
|
return IsElement() && AsElement()->HasAttr(aNameSpaceID, aName);
|
|
}
|
|
|
|
bool
|
|
nsIContent::AttrValueIs(int32_t aNameSpaceID,
|
|
nsIAtom* aName,
|
|
const nsAString& aValue,
|
|
nsCaseTreatment aCaseSensitive) const
|
|
{
|
|
return IsElement() &&
|
|
AsElement()->AttrValueIs(aNameSpaceID, aName, aValue, aCaseSensitive);
|
|
}
|
|
|
|
bool
|
|
nsIContent::AttrValueIs(int32_t aNameSpaceID,
|
|
nsIAtom* aName,
|
|
nsIAtom* aValue,
|
|
nsCaseTreatment aCaseSensitive) const
|
|
{
|
|
return IsElement() &&
|
|
AsElement()->AttrValueIs(aNameSpaceID, aName, aValue, aCaseSensitive);
|
|
}
|
|
|
|
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)) {
|
|
if (nsContentUtils::IsUserFocusIgnored(this)) {
|
|
if (aTabIndex) {
|
|
*aTabIndex = -1;
|
|
}
|
|
return false;
|
|
}
|
|
return focusable;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
nsIContent::IsFocusableInternal(int32_t* aTabIndex, bool aWithMouse)
|
|
{
|
|
if (aTabIndex) {
|
|
*aTabIndex = -1; // Default, not tabbable
|
|
}
|
|
return false;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
FragmentOrElement::WalkContentStyleRules(nsRuleWalker* aRuleWalker)
|
|
{
|
|
return NS_OK;
|
|
}
|
|
|
|
bool
|
|
FragmentOrElement::IsLink(nsIURI** aURI) const
|
|
{
|
|
*aURI = nullptr;
|
|
return false;
|
|
}
|
|
|
|
nsIContent*
|
|
FragmentOrElement::GetBindingParent() const
|
|
{
|
|
nsDOMSlots *slots = GetExistingDOMSlots();
|
|
|
|
if (slots) {
|
|
return slots->mBindingParent;
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
nsXBLBinding*
|
|
FragmentOrElement::GetXBLBinding() const
|
|
{
|
|
if (HasFlag(NODE_MAY_BE_IN_BINDING_MNGR)) {
|
|
nsDOMSlots *slots = GetExistingDOMSlots();
|
|
if (slots) {
|
|
return slots->mXBLBinding;
|
|
}
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
void
|
|
FragmentOrElement::SetXBLBinding(nsXBLBinding* aBinding,
|
|
nsBindingManager* aOldBindingManager)
|
|
{
|
|
nsBindingManager* bindingManager;
|
|
if (aOldBindingManager) {
|
|
MOZ_ASSERT(!aBinding, "aOldBindingManager should only be provided "
|
|
"when removing a binding.");
|
|
bindingManager = aOldBindingManager;
|
|
} else {
|
|
bindingManager = OwnerDoc()->BindingManager();
|
|
}
|
|
|
|
// After this point, aBinding will be the most-derived binding for aContent.
|
|
// If we already have a binding for aContent, make sure to
|
|
// remove it from the attached stack. Otherwise we might end up firing its
|
|
// constructor twice (if aBinding inherits from it) or firing its constructor
|
|
// after aContent has been deleted (if aBinding is null and the content node
|
|
// dies before we process mAttachedStack).
|
|
RefPtr<nsXBLBinding> oldBinding = GetXBLBinding();
|
|
if (oldBinding) {
|
|
bindingManager->RemoveFromAttachedQueue(oldBinding);
|
|
}
|
|
|
|
if (aBinding) {
|
|
SetFlags(NODE_MAY_BE_IN_BINDING_MNGR);
|
|
nsDOMSlots *slots = DOMSlots();
|
|
slots->mXBLBinding = aBinding;
|
|
bindingManager->AddBoundContent(this);
|
|
} else {
|
|
nsDOMSlots *slots = GetExistingDOMSlots();
|
|
if (slots) {
|
|
slots->mXBLBinding = nullptr;
|
|
}
|
|
bindingManager->RemoveBoundContent(this);
|
|
if (oldBinding) {
|
|
oldBinding->SetBoundElement(nullptr);
|
|
}
|
|
}
|
|
}
|
|
|
|
nsIContent*
|
|
FragmentOrElement::GetXBLInsertionParent() const
|
|
{
|
|
if (HasFlag(NODE_MAY_BE_IN_BINDING_MNGR)) {
|
|
nsDOMSlots *slots = GetExistingDOMSlots();
|
|
if (slots) {
|
|
return slots->mXBLInsertionParent;
|
|
}
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
ShadowRoot*
|
|
FragmentOrElement::GetContainingShadow() const
|
|
{
|
|
nsDOMSlots *slots = GetExistingDOMSlots();
|
|
if (slots) {
|
|
return slots->mContainingShadow;
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
void
|
|
FragmentOrElement::SetShadowRoot(ShadowRoot* aShadowRoot)
|
|
{
|
|
nsDOMSlots *slots = DOMSlots();
|
|
slots->mShadowRoot = aShadowRoot;
|
|
}
|
|
|
|
nsTArray<nsIContent*>&
|
|
FragmentOrElement::DestInsertionPoints()
|
|
{
|
|
nsDOMSlots *slots = DOMSlots();
|
|
return slots->mDestInsertionPoints;
|
|
}
|
|
|
|
nsTArray<nsIContent*>*
|
|
FragmentOrElement::GetExistingDestInsertionPoints() const
|
|
{
|
|
nsDOMSlots *slots = GetExistingDOMSlots();
|
|
if (slots) {
|
|
return &slots->mDestInsertionPoints;
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
void
|
|
FragmentOrElement::SetXBLInsertionParent(nsIContent* aContent)
|
|
{
|
|
if (aContent) {
|
|
nsDOMSlots *slots = DOMSlots();
|
|
SetFlags(NODE_MAY_BE_IN_BINDING_MNGR);
|
|
slots->mXBLInsertionParent = aContent;
|
|
} else {
|
|
nsDOMSlots *slots = GetExistingDOMSlots();
|
|
if (slots) {
|
|
slots->mXBLInsertionParent = nullptr;
|
|
}
|
|
}
|
|
}
|
|
|
|
CustomElementData*
|
|
FragmentOrElement::GetCustomElementData() const
|
|
{
|
|
nsDOMSlots *slots = GetExistingDOMSlots();
|
|
if (slots) {
|
|
return slots->mCustomElementData;
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
void
|
|
FragmentOrElement::SetCustomElementData(CustomElementData* aData)
|
|
{
|
|
nsDOMSlots *slots = DOMSlots();
|
|
MOZ_ASSERT(!slots->mCustomElementData, "Custom element data may not be changed once set.");
|
|
slots->mCustomElementData = aData;
|
|
}
|
|
|
|
nsresult
|
|
FragmentOrElement::InsertChildAt(nsIContent* aKid,
|
|
uint32_t aIndex,
|
|
bool aNotify)
|
|
{
|
|
NS_PRECONDITION(aKid, "null ptr");
|
|
|
|
return doInsertChildAt(aKid, aIndex, aNotify, mAttrsAndChildren);
|
|
}
|
|
|
|
void
|
|
FragmentOrElement::RemoveChildAt(uint32_t aIndex, bool aNotify)
|
|
{
|
|
nsCOMPtr<nsIContent> oldKid = mAttrsAndChildren.GetSafeChildAt(aIndex);
|
|
NS_ASSERTION(oldKid == GetChildAt(aIndex), "Unexpected child in RemoveChildAt");
|
|
|
|
if (oldKid) {
|
|
doRemoveChildAt(aIndex, aNotify, oldKid, mAttrsAndChildren);
|
|
}
|
|
}
|
|
|
|
void
|
|
FragmentOrElement::GetTextContentInternal(nsAString& aTextContent,
|
|
ErrorResult& aError)
|
|
{
|
|
if (!nsContentUtils::GetNodeTextContent(this, true, aTextContent, fallible)) {
|
|
aError.Throw(NS_ERROR_OUT_OF_MEMORY);
|
|
}
|
|
}
|
|
|
|
void
|
|
FragmentOrElement::SetTextContentInternal(const nsAString& aTextContent,
|
|
ErrorResult& aError)
|
|
{
|
|
aError = nsContentUtils::SetNodeTextContent(this, aTextContent, false);
|
|
}
|
|
|
|
void
|
|
FragmentOrElement::DestroyContent()
|
|
{
|
|
nsIDocument *document = OwnerDoc();
|
|
document->BindingManager()->RemovedFromDocument(this, document,
|
|
nsBindingManager::eRunDtor);
|
|
document->ClearBoxObjectFor(this);
|
|
|
|
uint32_t i, count = mAttrsAndChildren.ChildCount();
|
|
for (i = 0; i < count; ++i) {
|
|
// The child can remove itself from the parent in BindToTree.
|
|
mAttrsAndChildren.ChildAt(i)->DestroyContent();
|
|
}
|
|
ShadowRoot* shadowRoot = GetShadowRoot();
|
|
if (shadowRoot) {
|
|
shadowRoot->DestroyContent();
|
|
}
|
|
}
|
|
|
|
void
|
|
FragmentOrElement::SaveSubtreeState()
|
|
{
|
|
uint32_t i, count = mAttrsAndChildren.ChildCount();
|
|
for (i = 0; i < count; ++i) {
|
|
mAttrsAndChildren.ChildAt(i)->SaveSubtreeState();
|
|
}
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
|
|
// Generic DOMNode implementations
|
|
|
|
void
|
|
FragmentOrElement::FireNodeInserted(nsIDocument* aDoc,
|
|
nsINode* aParent,
|
|
nsTArray<nsCOMPtr<nsIContent> >& aNodes)
|
|
{
|
|
uint32_t count = aNodes.Length();
|
|
for (uint32_t i = 0; i < count; ++i) {
|
|
nsIContent* childContent = aNodes[i];
|
|
|
|
if (nsContentUtils::HasMutationListeners(childContent,
|
|
NS_EVENT_BITS_MUTATION_NODEINSERTED, aParent)) {
|
|
InternalMutationEvent mutation(true, eLegacyNodeInserted);
|
|
mutation.mRelatedNode = do_QueryInterface(aParent);
|
|
|
|
mozAutoSubtreeModified subtree(aDoc, aParent);
|
|
(new AsyncEventDispatcher(childContent, mutation))->RunDOMEventWhenSafe();
|
|
}
|
|
}
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
|
|
// nsISupports implementation
|
|
|
|
#define SUBTREE_UNBINDINGS_PER_RUNNABLE 500
|
|
|
|
class ContentUnbinder : public Runnable
|
|
{
|
|
public:
|
|
ContentUnbinder()
|
|
{
|
|
mLast = this;
|
|
}
|
|
|
|
~ContentUnbinder()
|
|
{
|
|
Run();
|
|
}
|
|
|
|
void UnbindSubtree(nsIContent* aNode)
|
|
{
|
|
if (aNode->NodeType() != nsIDOMNode::ELEMENT_NODE &&
|
|
aNode->NodeType() != nsIDOMNode::DOCUMENT_FRAGMENT_NODE) {
|
|
return;
|
|
}
|
|
FragmentOrElement* container = static_cast<FragmentOrElement*>(aNode);
|
|
uint32_t childCount = container->mAttrsAndChildren.ChildCount();
|
|
if (childCount) {
|
|
while (childCount-- > 0) {
|
|
// Hold a strong ref to the node when we remove it, because we may be
|
|
// the last reference to it. We need to call TakeChildAt() and
|
|
// update mFirstChild before calling UnbindFromTree, since this last
|
|
// can notify various observers and they should really see consistent
|
|
// tree state.
|
|
nsCOMPtr<nsIContent> child =
|
|
container->mAttrsAndChildren.TakeChildAt(childCount);
|
|
if (childCount == 0) {
|
|
container->mFirstChild = nullptr;
|
|
}
|
|
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_DispatchToMainThread(next);
|
|
}
|
|
}
|
|
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_DispatchToMainThread(e);
|
|
}
|
|
|
|
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();
|
|
}
|
|
|
|
NS_IMPL_CYCLE_COLLECTION_CLASS(FragmentOrElement)
|
|
|
|
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(FragmentOrElement)
|
|
nsINode::Unlink(tmp);
|
|
|
|
// The XBL binding is removed by RemoveFromBindingManagerRunnable
|
|
// which is dispatched in UnbindFromTree.
|
|
|
|
if (tmp->HasProperties()) {
|
|
if (tmp->IsHTMLElement() || tmp->IsSVGElement()) {
|
|
nsIAtom*** props = Element::HTMLSVGPropertiesToTraverseAndUnlink();
|
|
for (uint32_t i = 0; props[i]; ++i) {
|
|
tmp->DeleteProperty(*props[i]);
|
|
}
|
|
if (tmp->MayHaveAnimations()) {
|
|
nsIAtom** effectProps = EffectSet::GetEffectSetPropertyAtoms();
|
|
for (uint32_t i = 0; effectProps[i]; ++i) {
|
|
tmp->DeleteProperty(effectProps[i]);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Unlink child content (and unbind our subtree).
|
|
if (tmp->UnoptimizableCCNode() || !nsCCUncollectableMarker::sGeneration) {
|
|
uint32_t childCount = tmp->mAttrsAndChildren.ChildCount();
|
|
if (childCount) {
|
|
// Don't allow script to run while we're unbinding everything.
|
|
nsAutoScriptBlocker scriptBlocker;
|
|
while (childCount-- > 0) {
|
|
// Hold a strong ref to the node when we remove it, because we may be
|
|
// the last reference to it. We need to call TakeChildAt() and
|
|
// update mFirstChild before calling UnbindFromTree, since this last
|
|
// can notify various observers and they should really see consistent
|
|
// tree state.
|
|
nsCOMPtr<nsIContent> child = tmp->mAttrsAndChildren.TakeChildAt(childCount);
|
|
if (childCount == 0) {
|
|
tmp->mFirstChild = nullptr;
|
|
}
|
|
child->UnbindFromTree();
|
|
}
|
|
}
|
|
} else if (!tmp->GetParent() && tmp->mAttrsAndChildren.ChildCount()) {
|
|
ContentUnbinder::Append(tmp);
|
|
} /* else {
|
|
The subtree root will end up to a ContentUnbinder, and that will
|
|
unbind the child nodes.
|
|
} */
|
|
|
|
// Clear flag here because unlinking slots will clear the
|
|
// containing shadow root pointer.
|
|
tmp->UnsetFlags(NODE_IS_IN_SHADOW_TREE);
|
|
|
|
nsIDocument* doc = tmp->OwnerDoc();
|
|
doc->BindingManager()->RemovedFromDocument(tmp, doc,
|
|
nsBindingManager::eDoNotRunDtor);
|
|
|
|
// Unlink any DOM slots of interest.
|
|
{
|
|
nsDOMSlots *slots = tmp->GetExistingDOMSlots();
|
|
if (slots) {
|
|
slots->Unlink(tmp->IsXULElement());
|
|
}
|
|
}
|
|
|
|
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
|
|
|
|
NS_IMPL_CYCLE_COLLECTION_TRACE_WRAPPERCACHE(FragmentOrElement)
|
|
|
|
void
|
|
FragmentOrElement::MarkUserData(void* aObject, nsIAtom* aKey, void* aChild,
|
|
void* aData)
|
|
{
|
|
uint32_t* gen = static_cast<uint32_t*>(aData);
|
|
xpc_MarkInCCGeneration(static_cast<nsISupports*>(aChild), *gen);
|
|
}
|
|
|
|
void
|
|
FragmentOrElement::MarkNodeChildren(nsINode* aNode)
|
|
{
|
|
JSObject* o = GetJSObjectChild(aNode);
|
|
if (o) {
|
|
JS::ExposeObjectToActiveJS(o);
|
|
}
|
|
|
|
EventListenerManager* elm = aNode->GetExistingListenerManager();
|
|
if (elm) {
|
|
elm->MarkForCC();
|
|
}
|
|
|
|
if (aNode->HasProperties()) {
|
|
nsIDocument* ownerDoc = aNode->OwnerDoc();
|
|
ownerDoc->PropertyTable(DOM_USER_DATA)->
|
|
Enumerate(aNode, FragmentOrElement::MarkUserData,
|
|
&nsCCUncollectableMarker::sGeneration);
|
|
}
|
|
}
|
|
|
|
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<nsTHashtable<nsPtrHashKey<nsINode>>> gCCBlackMarkedNodes;
|
|
|
|
static void
|
|
ClearBlackMarkedNodes()
|
|
{
|
|
if (!gCCBlackMarkedNodes) {
|
|
return;
|
|
}
|
|
for (auto iter = gCCBlackMarkedNodes->ConstIter(); !iter.Done();
|
|
iter.Next()) {
|
|
nsINode* n = iter.Get()->GetKey();
|
|
n->SetCCMarkedRoot(false);
|
|
n->SetInCCBlackTree(false);
|
|
}
|
|
gCCBlackMarkedNodes = nullptr;
|
|
}
|
|
|
|
// static
|
|
void
|
|
FragmentOrElement::RemoveBlackMarkedNode(nsINode* aNode)
|
|
{
|
|
if (!gCCBlackMarkedNodes) {
|
|
return;
|
|
}
|
|
gCCBlackMarkedNodes->RemoveEntry(aNode);
|
|
}
|
|
|
|
static bool
|
|
IsCertainlyAliveNode(nsINode* aNode, nsIDocument* aDoc)
|
|
{
|
|
MOZ_ASSERT(aNode->GetUncomposedDoc() == 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;
|
|
}
|
|
|
|
//XXXsmaug Need to figure out in which cases Shadow DOM can be optimized out
|
|
// from the CC graph.
|
|
nsIDocument* currentDoc = aNode->GetUncomposedDoc();
|
|
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 nsTHashtable<nsPtrHashKey<nsINode> >(1020);
|
|
}
|
|
|
|
// nodesToUnpurple contains nodes which will be removed
|
|
// from the purple buffer if the DOM tree is black.
|
|
AutoTArray<nsIContent*, 1020> nodesToUnpurple;
|
|
// grayNodes need script traverse, so they aren't removed from
|
|
// the purple buffer, but are marked to be in black subtree so that
|
|
// traverse is faster.
|
|
AutoTArray<nsINode*, 1020> grayNodes;
|
|
|
|
bool foundBlack = root->IsBlack();
|
|
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 black.
|
|
// 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)) {
|
|
foundBlack = foundBlack || node->IsBlack();
|
|
if (foundBlack && currentDoc) {
|
|
// If we can mark the whole document black, 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(foundBlack);
|
|
gCCBlackMarkedNodes->PutEntry(root);
|
|
|
|
if (!foundBlack) {
|
|
return false;
|
|
}
|
|
|
|
if (currentDoc) {
|
|
// Special case documents. If we know the document is black,
|
|
// 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->PutEntry(node);
|
|
}
|
|
}
|
|
|
|
// Subtree is black, 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(nsIDocument* aCurrentDoc, nsINode* aNode)
|
|
{
|
|
return aCurrentDoc->GetShell() && aNode->IsElement() &&
|
|
aNode->AsElement()->GetPrimaryFrame();
|
|
}
|
|
|
|
bool
|
|
OwnedByBindingManager(nsIDocument* aCurrentDoc, nsINode* aNode)
|
|
{
|
|
return aNode->IsElement() && aNode->AsElement()->GetXBLBinding();
|
|
}
|
|
|
|
// CanSkip checks if aNode is black, and if it is, returns
|
|
// true. If aNode is in a black 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 blackness 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();
|
|
nsIDocument* currentDoc = aNode->GetUncomposedDoc();
|
|
if (currentDoc && IsCertainlyAliveNode(aNode, currentDoc) &&
|
|
(!unoptimizable || NodeHasActiveFrame(currentDoc, aNode) ||
|
|
OwnedByBindingManager(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 foundBlack = root->IsBlack();
|
|
bool domOnlyCycle = false;
|
|
if (root != currentDoc) {
|
|
currentDoc = nullptr;
|
|
if (!foundBlack) {
|
|
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 black.
|
|
// 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)) {
|
|
foundBlack = foundBlack || node->IsBlack();
|
|
if (foundBlack) {
|
|
domOnlyCycle = false;
|
|
if (currentDoc) {
|
|
// If we can mark the whole document black, 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 black tree or are in a DOM-only cycle.
|
|
nodesToClear.AppendElement(node);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!currentDoc || !foundBlack) {
|
|
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 (!foundBlack) {
|
|
return false;
|
|
}
|
|
|
|
if (currentDoc) {
|
|
// Special case documents. If we know the document is black,
|
|
// we can mark the document to be in CCGeneration.
|
|
currentDoc->
|
|
MarkUncollectableForCCGeneration(nsCCUncollectableMarker::sGeneration);
|
|
MarkNodeChildren(currentDoc);
|
|
}
|
|
|
|
// Subtree is black, 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->IsBlack()) {
|
|
return true;
|
|
}
|
|
nsIDocument* c = aNode->GetUncomposedDoc();
|
|
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
|
|
|
|
static const char* kNSURIs[] = {
|
|
" ([none])",
|
|
" (xmlns)",
|
|
" (xml)",
|
|
" (xhtml)",
|
|
" (XLink)",
|
|
" (XSLT)",
|
|
" (XBL)",
|
|
" (MathML)",
|
|
" (RDF)",
|
|
" (XUL)",
|
|
" (SVG)",
|
|
" (XML Events)"
|
|
};
|
|
|
|
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;
|
|
nsIAtom* idAtom = tmp->GetID();
|
|
if (idAtom) {
|
|
id.AppendLiteral(" id='");
|
|
id.Append(nsDependentAtomString(idAtom));
|
|
id.Append('\'');
|
|
}
|
|
|
|
nsAutoString classes;
|
|
const nsAttrValue* classAttrValue = tmp->GetClasses();
|
|
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->IsInUncomposedDoc() &&
|
|
// Ignore xbl:content, which is never in the document and hence always
|
|
// appears to be orphaned.
|
|
!tmp->NodeInfo()->Equals(nsGkAtoms::content, kNameSpaceID_XBL)) {
|
|
orphan.AppendLiteral(" (orphan)");
|
|
}
|
|
|
|
const char* nsuri = nsid < ArrayLength(kNSURIs) ? kNSURIs[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())
|
|
}
|
|
|
|
// Always need to traverse script objects, so do that before we check
|
|
// if we're uncollectable.
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS
|
|
|
|
if (!nsINode::Traverse(tmp, cb)) {
|
|
return NS_SUCCESS_INTERRUPTED_TRAVERSE;
|
|
}
|
|
|
|
tmp->OwnerDoc()->BindingManager()->Traverse(tmp, cb);
|
|
|
|
// Check that whenever we have effect properties, MayHaveAnimations is set.
|
|
#ifdef DEBUG
|
|
nsIAtom** effectProps = EffectSet::GetEffectSetPropertyAtoms();
|
|
for (uint32_t i = 0; effectProps[i]; ++i) {
|
|
MOZ_ASSERT_IF(tmp->GetProperty(effectProps[i]), tmp->MayHaveAnimations());
|
|
}
|
|
#endif
|
|
|
|
if (tmp->HasProperties()) {
|
|
if (tmp->IsHTMLElement() || tmp->IsSVGElement()) {
|
|
nsIAtom*** 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->MayHaveAnimations()) {
|
|
nsIAtom** effectProps = EffectSet::GetEffectSetPropertyAtoms();
|
|
for (uint32_t i = 0; effectProps[i]; ++i) {
|
|
EffectSet* effectSet =
|
|
static_cast<EffectSet*>(tmp->GetProperty(effectProps[i]));
|
|
if (effectSet) {
|
|
effectSet->Traverse(cb);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Traverse attribute names and child content.
|
|
{
|
|
uint32_t i;
|
|
uint32_t attrs = tmp->mAttrsAndChildren.AttrCount();
|
|
for (i = 0; i < attrs; i++) {
|
|
const nsAttrName* name = tmp->mAttrsAndChildren.AttrNameAt(i);
|
|
if (!name->IsAtom()) {
|
|
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb,
|
|
"mAttrsAndChildren[i]->NodeInfo()");
|
|
cb.NoteNativeChild(name->NodeInfo(),
|
|
NS_CYCLE_COLLECTION_PARTICIPANT(NodeInfo));
|
|
}
|
|
}
|
|
|
|
uint32_t kids = tmp->mAttrsAndChildren.ChildCount();
|
|
for (i = 0; i < kids; i++) {
|
|
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mAttrsAndChildren[i]");
|
|
cb.NoteXPCOMChild(tmp->mAttrsAndChildren.GetSafeChildAt(i));
|
|
}
|
|
}
|
|
|
|
// Traverse any DOM slots of interest.
|
|
{
|
|
nsDOMSlots *slots = tmp->GetExistingDOMSlots();
|
|
if (slots) {
|
|
slots->Traverse(cb, tmp->IsXULElement());
|
|
}
|
|
}
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
|
|
|
|
|
|
NS_INTERFACE_MAP_BEGIN(FragmentOrElement)
|
|
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
|
|
NS_INTERFACE_MAP_ENTRIES_CYCLE_COLLECTION(FragmentOrElement)
|
|
NS_INTERFACE_MAP_ENTRY(Element)
|
|
NS_INTERFACE_MAP_ENTRY(nsIContent)
|
|
NS_INTERFACE_MAP_ENTRY(nsINode)
|
|
NS_INTERFACE_MAP_ENTRY(nsIDOMEventTarget)
|
|
NS_INTERFACE_MAP_ENTRY(mozilla::dom::EventTarget)
|
|
NS_INTERFACE_MAP_ENTRY_TEAROFF(nsISupportsWeakReference,
|
|
new nsNodeSupportsWeakRefTearoff(this))
|
|
// DOM bindings depend on the identity pointer being the
|
|
// same as nsINode (which nsIContent inherits).
|
|
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIContent)
|
|
NS_INTERFACE_MAP_END
|
|
|
|
NS_IMPL_CYCLE_COLLECTING_ADDREF(FragmentOrElement)
|
|
NS_IMPL_CYCLE_COLLECTING_RELEASE_WITH_LAST_RELEASE(FragmentOrElement,
|
|
nsNodeUtils::LastRelease(this))
|
|
|
|
//----------------------------------------------------------------------
|
|
|
|
nsresult
|
|
FragmentOrElement::CopyInnerTo(FragmentOrElement* aDst)
|
|
{
|
|
uint32_t i, count = mAttrsAndChildren.AttrCount();
|
|
for (i = 0; i < count; ++i) {
|
|
const nsAttrName* name = mAttrsAndChildren.AttrNameAt(i);
|
|
const nsAttrValue* value = mAttrsAndChildren.AttrAt(i);
|
|
nsAutoString valStr;
|
|
value->ToString(valStr);
|
|
nsresult rv = aDst->SetAttr(name->NamespaceID(), name->LocalName(),
|
|
name->GetPrefix(), valStr, false);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
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
|
|
NS_NOTREACHED("called FragmentOrElement::TextLength");
|
|
|
|
return 0;
|
|
}
|
|
|
|
nsresult
|
|
FragmentOrElement::SetText(const char16_t* aBuffer, uint32_t aLength,
|
|
bool aNotify)
|
|
{
|
|
NS_ERROR("called FragmentOrElement::SetText");
|
|
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
nsresult
|
|
FragmentOrElement::AppendText(const char16_t* aBuffer, uint32_t aLength,
|
|
bool aNotify)
|
|
{
|
|
NS_ERROR("called FragmentOrElement::AppendText");
|
|
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
bool
|
|
FragmentOrElement::TextIsOnlyWhitespace()
|
|
{
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
FragmentOrElement::HasTextForTranslation()
|
|
{
|
|
return false;
|
|
}
|
|
|
|
void
|
|
FragmentOrElement::AppendTextTo(nsAString& aResult)
|
|
{
|
|
// We can remove this assertion if it turns out to be useful to be able
|
|
// to depend on this appending nothing.
|
|
NS_NOTREACHED("called FragmentOrElement::TextLength");
|
|
}
|
|
|
|
bool
|
|
FragmentOrElement::AppendTextTo(nsAString& aResult, const mozilla::fallible_t&)
|
|
{
|
|
// We can remove this assertion if it turns out to be useful to be able
|
|
// to depend on this appending nothing.
|
|
NS_NOTREACHED("called FragmentOrElement::TextLength");
|
|
|
|
return false;
|
|
}
|
|
|
|
uint32_t
|
|
FragmentOrElement::GetChildCount() const
|
|
{
|
|
return mAttrsAndChildren.ChildCount();
|
|
}
|
|
|
|
nsIContent *
|
|
FragmentOrElement::GetChildAt(uint32_t aIndex) const
|
|
{
|
|
return mAttrsAndChildren.GetSafeChildAt(aIndex);
|
|
}
|
|
|
|
nsIContent * const *
|
|
FragmentOrElement::GetChildArray(uint32_t* aChildCount) const
|
|
{
|
|
return mAttrsAndChildren.GetChildArray(aChildCount);
|
|
}
|
|
|
|
int32_t
|
|
FragmentOrElement::IndexOf(const nsINode* aPossibleChild) const
|
|
{
|
|
return mAttrsAndChildren.IndexOfChild(aPossibleChild);
|
|
}
|
|
|
|
static inline bool
|
|
IsVoidTag(nsIAtom* aTag)
|
|
{
|
|
static const nsIAtom* 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::BloomFilter<12, nsIAtom> 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(nsIAtom* aLocalName)
|
|
{
|
|
return aLocalName && IsVoidTag(aLocalName);
|
|
}
|
|
|
|
void
|
|
FragmentOrElement::GetMarkup(bool aIncludeSelf, nsAString& aMarkup)
|
|
{
|
|
aMarkup.Truncate();
|
|
|
|
nsIDocument* 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_CreateInstance(PromiseFlatCString(
|
|
nsDependentCString(NS_DOC_ENCODER_CONTRACTID_BASE) +
|
|
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_CreateInstance(NS_DOC_ENCODER_CONTRACTID_BASE "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);
|
|
nsIEditor* editor = elem ? elem->GetEditorInternal() : nullptr;
|
|
if (editor && editor->OutputsMozDirty()) {
|
|
flags &= ~nsIDocumentEncoder::OutputIgnoreMozDirty;
|
|
}
|
|
}
|
|
|
|
DebugOnly<nsresult> rv = docEncoder->NativeInit(doc, contentType, flags);
|
|
MOZ_ASSERT(NS_SUCCEEDED(rv));
|
|
|
|
if (aIncludeSelf) {
|
|
docEncoder->SetNativeNode(this);
|
|
} else {
|
|
docEncoder->SetNativeContainerNode(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)
|
|
{
|
|
FragmentOrElement* target = this;
|
|
// Handle template case.
|
|
if (nsNodeUtils::IsTemplateElement(target)) {
|
|
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;
|
|
}
|
|
|
|
nsIDocument* 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, UPDATE_CONTENT_MODEL, true);
|
|
|
|
// Remove childnodes.
|
|
uint32_t childCount = target->GetChildCount();
|
|
nsAutoMutationBatch mb(target, true, false);
|
|
for (uint32_t i = 0; i < childCount; ++i) {
|
|
target->RemoveChildAt(0, true);
|
|
}
|
|
mb.RemovalDone();
|
|
|
|
nsAutoScriptLoaderDisabler sld(doc);
|
|
|
|
nsIAtom* contextLocalName = NodeInfo()->NameAtom();
|
|
int32_t contextNameSpaceID = GetNameSpaceID();
|
|
|
|
ShadowRoot* shadowRoot = ShadowRoot::FromNode(this);
|
|
if (shadowRoot) {
|
|
// Fix up the context to be the host of the ShadowRoot.
|
|
contextLocalName = shadowRoot->GetHost()->NodeInfo()->NameAtom();
|
|
contextNameSpaceID = shadowRoot->GetHost()->GetNameSpaceID();
|
|
}
|
|
|
|
if (doc->IsHTMLDocument()) {
|
|
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(target, 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;
|
|
|
|
static_cast<nsINode*>(target)->AppendChild(*df, aError);
|
|
mb.NodesAdded();
|
|
}
|
|
}
|
|
}
|
|
|
|
nsINode::nsSlots*
|
|
FragmentOrElement::CreateSlots()
|
|
{
|
|
return new nsDOMSlots();
|
|
}
|
|
|
|
void
|
|
FragmentOrElement::FireNodeRemovedForChildren()
|
|
{
|
|
nsIDocument* doc = OwnerDoc();
|
|
// Optimize the common case
|
|
if (!nsContentUtils::
|
|
HasMutationListeners(doc, NS_EVENT_BITS_MUTATION_NODEREMOVED)) {
|
|
return;
|
|
}
|
|
|
|
nsCOMPtr<nsIDocument> owningDoc = doc;
|
|
|
|
nsCOMPtr<nsINode> child;
|
|
for (child = GetFirstChild();
|
|
child && child->GetParentNode() == this;
|
|
child = child->GetNextSibling()) {
|
|
nsContentUtils::MaybeFireNodeRemoved(child, this, doc);
|
|
}
|
|
}
|
|
|
|
size_t
|
|
FragmentOrElement::SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const
|
|
{
|
|
size_t n = 0;
|
|
n += nsIContent::SizeOfExcludingThis(aMallocSizeOf);
|
|
n += mAttrsAndChildren.SizeOfExcludingThis(aMallocSizeOf);
|
|
|
|
nsDOMSlots* slots = GetExistingDOMSlots();
|
|
if (slots) {
|
|
n += slots->SizeOfIncludingThis(aMallocSizeOf);
|
|
}
|
|
|
|
return n;
|
|
}
|
|
|
|
void
|
|
FragmentOrElement::SetIsElementInStyleScopeFlagOnSubtree(bool aInStyleScope)
|
|
{
|
|
if (aInStyleScope && IsElementInStyleScope()) {
|
|
return;
|
|
}
|
|
|
|
if (IsElement()) {
|
|
SetIsElementInStyleScope(aInStyleScope);
|
|
SetIsElementInStyleScopeFlagOnShadowTree(aInStyleScope);
|
|
}
|
|
|
|
nsIContent* n = GetNextNode(this);
|
|
while (n) {
|
|
if (n->IsElementInStyleScope()) {
|
|
n = n->GetNextNonChildNode(this);
|
|
} else {
|
|
if (n->IsElement()) {
|
|
n->SetIsElementInStyleScope(aInStyleScope);
|
|
n->AsElement()->SetIsElementInStyleScopeFlagOnShadowTree(aInStyleScope);
|
|
}
|
|
n = n->GetNextNode(this);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
FragmentOrElement::SetIsElementInStyleScopeFlagOnShadowTree(bool aInStyleScope)
|
|
{
|
|
NS_ASSERTION(IsElement(), "calling SetIsElementInStyleScopeFlagOnShadowTree "
|
|
"on a non-Element is useless");
|
|
ShadowRoot* shadowRoot = GetShadowRoot();
|
|
while (shadowRoot) {
|
|
shadowRoot->SetIsElementInStyleScopeFlagOnSubtree(aInStyleScope);
|
|
shadowRoot = shadowRoot->GetOlderShadowRoot();
|
|
}
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
static void
|
|
AssertDirtyDescendantsBitPropagated(nsINode* aNode)
|
|
{
|
|
MOZ_ASSERT(aNode->HasDirtyDescendantsForServo());
|
|
nsINode* parent = aNode->GetFlattenedTreeParentNode();
|
|
if (!parent->IsContent()) {
|
|
MOZ_ASSERT(parent == aNode->OwnerDoc());
|
|
MOZ_ASSERT(parent->HasDirtyDescendantsForServo());
|
|
} else {
|
|
AssertDirtyDescendantsBitPropagated(parent);
|
|
}
|
|
}
|
|
#else
|
|
static void AssertDirtyDescendantsBitPropagated(nsINode* aNode) {}
|
|
#endif
|
|
|
|
void
|
|
nsIContent::MarkAncestorsAsHavingDirtyDescendantsForServo()
|
|
{
|
|
MOZ_ASSERT(IsInComposedDoc());
|
|
|
|
// Get the parent in the flattened tree.
|
|
nsINode* parent = GetFlattenedTreeParentNode();
|
|
|
|
// Loop until we hit a base case.
|
|
while (true) {
|
|
|
|
// Base case: the document.
|
|
if (!parent->IsContent()) {
|
|
MOZ_ASSERT(parent == OwnerDoc());
|
|
parent->SetHasDirtyDescendantsForServo();
|
|
return;
|
|
}
|
|
|
|
// Base case: the parent is already marked, and therefore
|
|
// so are all its ancestors.
|
|
if (parent->HasDirtyDescendantsForServo()) {
|
|
AssertDirtyDescendantsBitPropagated(parent);
|
|
return;
|
|
}
|
|
|
|
// Mark the parent and iterate.
|
|
parent->SetHasDirtyDescendantsForServo();
|
|
parent = parent->GetFlattenedTreeParentNode();
|
|
}
|
|
}
|