зеркало из https://github.com/mozilla/gecko-dev.git
394 строки
9.0 KiB
C++
394 строки
9.0 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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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* Implementation of DOM Core's nsIDOMAttr node.
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*/
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#include "mozilla/dom/Attr.h"
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#include "mozilla/dom/AttrBinding.h"
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#include "mozilla/dom/Element.h"
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#include "mozilla/EventDispatcher.h"
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#include "mozilla/InternalMutationEvent.h"
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#include "nsContentCreatorFunctions.h"
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#include "nsError.h"
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#include "nsUnicharUtils.h"
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#include "nsDOMString.h"
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#include "nsIContentInlines.h"
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#include "nsIDocument.h"
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#include "nsGkAtoms.h"
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#include "nsCOMArray.h"
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#include "nsNameSpaceManager.h"
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#include "nsNodeUtils.h"
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#include "nsTextNode.h"
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#include "mozAutoDocUpdate.h"
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#include "nsWrapperCacheInlines.h"
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nsIAttribute::nsIAttribute(nsDOMAttributeMap* aAttrMap,
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already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo,
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bool aNsAware)
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: nsINode(aNodeInfo), mAttrMap(aAttrMap), mNsAware(aNsAware)
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{
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}
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nsIAttribute::~nsIAttribute()
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{
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}
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namespace mozilla {
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namespace dom {
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//----------------------------------------------------------------------
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bool Attr::sInitialized;
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Attr::Attr(nsDOMAttributeMap *aAttrMap,
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already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo,
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const nsAString &aValue, bool aNsAware)
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: nsIAttribute(aAttrMap, aNodeInfo, aNsAware), mValue(aValue)
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{
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MOZ_ASSERT(mNodeInfo, "We must get a nodeinfo here!");
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MOZ_ASSERT(mNodeInfo->NodeType() == nsIDOMNode::ATTRIBUTE_NODE,
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"Wrong nodeType");
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// We don't add a reference to our content. It will tell us
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// to drop our reference when it goes away.
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}
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NS_IMPL_CYCLE_COLLECTION_CLASS(Attr)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(Attr)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS
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if (!nsINode::Traverse(tmp, cb)) {
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return NS_SUCCESS_INTERRUPTED_TRAVERSE;
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}
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mAttrMap)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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NS_IMPL_CYCLE_COLLECTION_TRACE_WRAPPERCACHE(Attr)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(Attr)
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nsINode::Unlink(tmp);
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mAttrMap)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END
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NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_BEGIN(Attr)
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Element* ownerElement = tmp->GetElement();
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if (tmp->IsBlack()) {
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if (ownerElement) {
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// The attribute owns the element via attribute map so we can
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// mark it when the attribute is certainly alive.
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mozilla::dom::FragmentOrElement::MarkNodeChildren(ownerElement);
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}
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return true;
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}
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if (ownerElement &&
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mozilla::dom::FragmentOrElement::CanSkip(ownerElement, true)) {
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return true;
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}
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NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_END
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NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_BEGIN(Attr)
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return tmp->IsBlackAndDoesNotNeedTracing(static_cast<nsIAttribute*>(tmp));
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NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_END
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NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_BEGIN(Attr)
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return tmp->IsBlack();
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NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_END
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// QueryInterface implementation for Attr
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NS_INTERFACE_TABLE_HEAD(Attr)
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NS_WRAPPERCACHE_INTERFACE_TABLE_ENTRY
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NS_INTERFACE_TABLE(Attr, nsINode, nsIDOMAttr, nsIAttribute, nsIDOMNode,
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nsIDOMEventTarget, EventTarget)
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NS_INTERFACE_TABLE_TO_MAP_SEGUE_CYCLE_COLLECTION(Attr)
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NS_INTERFACE_MAP_ENTRY_TEAROFF(nsISupportsWeakReference,
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new nsNodeSupportsWeakRefTearoff(this))
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NS_INTERFACE_MAP_END
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NS_IMPL_CYCLE_COLLECTING_ADDREF(Attr)
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NS_IMPL_CYCLE_COLLECTING_RELEASE_WITH_LAST_RELEASE(Attr,
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nsNodeUtils::LastRelease(this))
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void
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Attr::SetMap(nsDOMAttributeMap *aMap)
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{
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if (mAttrMap && !aMap && sInitialized) {
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// We're breaking a relationship with content and not getting a new one,
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// need to locally cache value. GetValue() does that.
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GetValue(mValue);
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}
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mAttrMap = aMap;
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}
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Element*
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Attr::GetElement() const
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{
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if (!mAttrMap) {
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return nullptr;
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}
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nsIContent* content = mAttrMap->GetContent();
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return content ? content->AsElement() : nullptr;
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}
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nsresult
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Attr::SetOwnerDocument(nsIDocument* aDocument)
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{
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NS_ASSERTION(aDocument, "Missing document");
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nsIDocument *doc = OwnerDoc();
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NS_ASSERTION(doc != aDocument, "bad call to Attr::SetOwnerDocument");
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doc->DeleteAllPropertiesFor(this);
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nsRefPtr<mozilla::dom::NodeInfo> newNodeInfo;
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newNodeInfo = aDocument->NodeInfoManager()->
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GetNodeInfo(mNodeInfo->NameAtom(), mNodeInfo->GetPrefixAtom(),
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mNodeInfo->NamespaceID(),
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nsIDOMNode::ATTRIBUTE_NODE);
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NS_ASSERTION(newNodeInfo, "GetNodeInfo lies");
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mNodeInfo.swap(newNodeInfo);
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return NS_OK;
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}
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NS_IMETHODIMP
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Attr::GetName(nsAString& aName)
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{
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aName = NodeName();
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return NS_OK;
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}
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already_AddRefed<nsIAtom>
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Attr::GetNameAtom(nsIContent* aContent)
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{
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if (!mNsAware &&
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mNodeInfo->NamespaceID() == kNameSpaceID_None &&
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aContent->IsInHTMLDocument() &&
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aContent->IsHTMLElement()) {
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nsString name;
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mNodeInfo->GetName(name);
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nsAutoString lowercaseName;
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nsContentUtils::ASCIIToLower(name, lowercaseName);
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return do_GetAtom(lowercaseName);
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}
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nsCOMPtr<nsIAtom> nameAtom = mNodeInfo->NameAtom();
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return nameAtom.forget();
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}
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NS_IMETHODIMP
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Attr::GetValue(nsAString& aValue)
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{
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Element* element = GetElement();
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if (element) {
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nsCOMPtr<nsIAtom> nameAtom = mNodeInfo->NameAtom();
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element->GetAttr(mNodeInfo->NamespaceID(), nameAtom, aValue);
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}
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else {
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aValue = mValue;
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}
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return NS_OK;
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}
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void
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Attr::SetValue(const nsAString& aValue, ErrorResult& aRv)
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{
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Element* element = GetElement();
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if (!element) {
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mValue = aValue;
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return;
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}
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nsCOMPtr<nsIAtom> nameAtom = mNodeInfo->NameAtom();
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aRv = element->SetAttr(mNodeInfo->NamespaceID(),
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nameAtom,
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mNodeInfo->GetPrefixAtom(),
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aValue,
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true);
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}
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NS_IMETHODIMP
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Attr::SetValue(const nsAString& aValue)
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{
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ErrorResult rv;
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SetValue(aValue, rv);
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return rv.ErrorCode();
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}
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bool
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Attr::Specified() const
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{
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return true;
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}
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NS_IMETHODIMP
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Attr::GetSpecified(bool* aSpecified)
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{
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NS_ENSURE_ARG_POINTER(aSpecified);
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*aSpecified = Specified();
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return NS_OK;
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}
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Element*
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Attr::GetOwnerElement(ErrorResult& aRv)
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{
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OwnerDoc()->WarnOnceAbout(nsIDocument::eOwnerElement);
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return GetElement();
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}
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NS_IMETHODIMP
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Attr::GetOwnerElement(nsIDOMElement** aOwnerElement)
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{
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NS_ENSURE_ARG_POINTER(aOwnerElement);
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OwnerDoc()->WarnOnceAbout(nsIDocument::eOwnerElement);
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Element* element = GetElement();
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if (element) {
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return CallQueryInterface(element, aOwnerElement);
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}
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*aOwnerElement = nullptr;
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return NS_OK;
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}
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void
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Attr::GetNodeValueInternal(nsAString& aNodeValue)
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{
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OwnerDoc()->WarnOnceAbout(nsIDocument::eNodeValue);
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GetValue(aNodeValue);
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}
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void
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Attr::SetNodeValueInternal(const nsAString& aNodeValue, ErrorResult& aError)
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{
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OwnerDoc()->WarnOnceAbout(nsIDocument::eNodeValue);
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aError = SetValue(aNodeValue);
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}
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nsresult
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Attr::Clone(mozilla::dom::NodeInfo *aNodeInfo, nsINode **aResult) const
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{
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nsAutoString value;
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const_cast<Attr*>(this)->GetValue(value);
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nsRefPtr<mozilla::dom::NodeInfo> ni = aNodeInfo;
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*aResult = new Attr(nullptr, ni.forget(), value, mNsAware);
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if (!*aResult) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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NS_ADDREF(*aResult);
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return NS_OK;
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}
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already_AddRefed<nsIURI>
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Attr::GetBaseURI(bool aTryUseXHRDocBaseURI) const
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{
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Element* parent = GetElement();
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return parent ? parent->GetBaseURI(aTryUseXHRDocBaseURI) : nullptr;
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}
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void
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Attr::GetTextContentInternal(nsAString& aTextContent,
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ErrorResult& aError)
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{
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OwnerDoc()->WarnOnceAbout(nsIDocument::eTextContent);
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GetValue(aTextContent);
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}
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void
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Attr::SetTextContentInternal(const nsAString& aTextContent,
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ErrorResult& aError)
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{
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OwnerDoc()->WarnOnceAbout(nsIDocument::eTextContent);
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SetNodeValueInternal(aTextContent, aError);
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}
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NS_IMETHODIMP
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Attr::GetIsId(bool* aReturn)
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{
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*aReturn = mNodeInfo->Equals(nsGkAtoms::id, kNameSpaceID_None);
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return NS_OK;
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}
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bool
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Attr::IsNodeOfType(uint32_t aFlags) const
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{
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return !(aFlags & ~eATTRIBUTE);
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}
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uint32_t
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Attr::GetChildCount() const
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{
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return 0;
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}
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nsIContent *
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Attr::GetChildAt(uint32_t aIndex) const
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{
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return nullptr;
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}
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nsIContent * const *
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Attr::GetChildArray(uint32_t* aChildCount) const
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{
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*aChildCount = 0;
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return nullptr;
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}
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int32_t
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Attr::IndexOf(const nsINode* aPossibleChild) const
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{
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return -1;
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}
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nsresult
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Attr::InsertChildAt(nsIContent* aKid, uint32_t aIndex,
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bool aNotify)
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{
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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void
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Attr::RemoveChildAt(uint32_t aIndex, bool aNotify)
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{
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}
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nsresult
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Attr::PreHandleEvent(EventChainPreVisitor& aVisitor)
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{
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aVisitor.mCanHandle = true;
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return NS_OK;
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}
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void
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Attr::Initialize()
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{
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sInitialized = true;
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}
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void
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Attr::Shutdown()
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{
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sInitialized = false;
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}
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JSObject*
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Attr::WrapNode(JSContext* aCx)
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{
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return AttrBinding::Wrap(aCx, this);
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}
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} // namespace dom
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} // namespace mozilla
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