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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /dom/xml/nsXMLContentSink.cpp
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'dom/xml/nsXMLContentSink.cpp')
-rw-r--r--dom/xml/nsXMLContentSink.cpp1590
1 files changed, 1590 insertions, 0 deletions
diff --git a/dom/xml/nsXMLContentSink.cpp b/dom/xml/nsXMLContentSink.cpp
new file mode 100644
index 000000000..7c9d308fd
--- /dev/null
+++ b/dom/xml/nsXMLContentSink.cpp
@@ -0,0 +1,1590 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsCOMPtr.h"
+#include "nsXMLContentSink.h"
+#include "nsIParser.h"
+#include "nsIDocument.h"
+#include "nsIDOMDocument.h"
+#include "nsIDOMDocumentType.h"
+#include "nsIContent.h"
+#include "nsIURI.h"
+#include "nsNetUtil.h"
+#include "nsIDocShell.h"
+#include "nsIStyleSheetLinkingElement.h"
+#include "nsIDOMComment.h"
+#include "nsIDOMCDATASection.h"
+#include "DocumentType.h"
+#include "nsHTMLParts.h"
+#include "nsCRT.h"
+#include "mozilla/StyleSheetInlines.h"
+#include "mozilla/css/Loader.h"
+#include "nsGkAtoms.h"
+#include "nsContentUtils.h"
+#include "nsIScriptContext.h"
+#include "nsNameSpaceManager.h"
+#include "nsIServiceManager.h"
+#include "nsIScriptSecurityManager.h"
+#include "nsIContentViewer.h"
+#include "prtime.h"
+#include "mozilla/Logging.h"
+#include "prmem.h"
+#include "nsRect.h"
+#include "nsIWebNavigation.h"
+#include "nsIScriptElement.h"
+#include "nsScriptLoader.h"
+#include "nsStyleLinkElement.h"
+#include "nsReadableUtils.h"
+#include "nsUnicharUtils.h"
+#include "nsICookieService.h"
+#include "nsIPrompt.h"
+#include "nsIChannel.h"
+#include "nsIPrincipal.h"
+#include "nsXMLPrettyPrinter.h"
+#include "nsNodeInfoManager.h"
+#include "nsContentCreatorFunctions.h"
+#include "nsIContentPolicy.h"
+#include "nsContentPolicyUtils.h"
+#include "nsError.h"
+#include "nsIDOMProcessingInstruction.h"
+#include "nsNodeUtils.h"
+#include "nsIScriptGlobalObject.h"
+#include "nsIHTMLDocument.h"
+#include "mozAutoDocUpdate.h"
+#include "nsMimeTypes.h"
+#include "nsHtml5SVGLoadDispatcher.h"
+#include "nsTextNode.h"
+#include "mozilla/dom/CDATASection.h"
+#include "mozilla/dom/Comment.h"
+#include "mozilla/dom/Element.h"
+#include "mozilla/dom/HTMLTemplateElement.h"
+#include "mozilla/dom/ProcessingInstruction.h"
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+// XXX Open Issues:
+// 1) what's not allowed - We need to figure out which HTML tags
+// (prefixed with a HTML namespace qualifier) are explicitly not
+// allowed (if any).
+// 2) factoring code with nsHTMLContentSink - There's some amount of
+// common code between this and the HTML content sink. This will
+// increase as we support more and more HTML elements. How can code
+// from the code be factored?
+
+nsresult
+NS_NewXMLContentSink(nsIXMLContentSink** aResult,
+ nsIDocument* aDoc,
+ nsIURI* aURI,
+ nsISupports* aContainer,
+ nsIChannel* aChannel)
+{
+ NS_PRECONDITION(nullptr != aResult, "null ptr");
+ if (nullptr == aResult) {
+ return NS_ERROR_NULL_POINTER;
+ }
+ RefPtr<nsXMLContentSink> it = new nsXMLContentSink();
+
+ nsresult rv = it->Init(aDoc, aURI, aContainer, aChannel);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ it.forget(aResult);
+ return NS_OK;
+}
+
+nsXMLContentSink::nsXMLContentSink()
+ : mTextLength(0)
+ , mNotifyLevel(0)
+ , mPrettyPrintXML(true)
+ , mPrettyPrintHasSpecialRoot(0)
+ , mPrettyPrintHasFactoredElements(0)
+ , mPrettyPrinting(0)
+ , mPreventScriptExecution(0)
+{
+ PodArrayZero(mText);
+}
+
+nsXMLContentSink::~nsXMLContentSink()
+{
+}
+
+nsresult
+nsXMLContentSink::Init(nsIDocument* aDoc,
+ nsIURI* aURI,
+ nsISupports* aContainer,
+ nsIChannel* aChannel)
+{
+ nsresult rv = nsContentSink::Init(aDoc, aURI, aContainer, aChannel);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ aDoc->AddObserver(this);
+ mIsDocumentObserver = true;
+
+ if (!mDocShell) {
+ mPrettyPrintXML = false;
+ }
+
+ mState = eXMLContentSinkState_InProlog;
+ mDocElement = nullptr;
+
+ return NS_OK;
+}
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(nsXMLContentSink)
+ NS_INTERFACE_MAP_ENTRY(nsIContentSink)
+ NS_INTERFACE_MAP_ENTRY(nsIXMLContentSink)
+ NS_INTERFACE_MAP_ENTRY(nsIExpatSink)
+ NS_INTERFACE_MAP_ENTRY(nsITransformObserver)
+NS_INTERFACE_MAP_END_INHERITING(nsContentSink)
+
+NS_IMPL_ADDREF_INHERITED(nsXMLContentSink, nsContentSink)
+NS_IMPL_RELEASE_INHERITED(nsXMLContentSink, nsContentSink)
+
+NS_IMPL_CYCLE_COLLECTION_CLASS(nsXMLContentSink)
+
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(nsXMLContentSink,
+ nsContentSink)
+ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mCurrentHead)
+ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mDocElement)
+ for (uint32_t i = 0, count = tmp->mContentStack.Length(); i < count; i++) {
+ const StackNode& node = tmp->mContentStack.ElementAt(i);
+ cb.NoteXPCOMChild(node.mContent);
+ }
+ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mDocumentChildren)
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
+
+// nsIContentSink
+NS_IMETHODIMP
+nsXMLContentSink::WillParse(void)
+{
+ return WillParseImpl();
+}
+
+NS_IMETHODIMP
+nsXMLContentSink::WillBuildModel(nsDTDMode aDTDMode)
+{
+ WillBuildModelImpl();
+
+ // Notify document that the load is beginning
+ mDocument->BeginLoad();
+
+ // Check for correct load-command for maybe prettyprinting
+ if (mPrettyPrintXML) {
+ nsAutoCString command;
+ GetParser()->GetCommand(command);
+ if (!command.EqualsLiteral("view")) {
+ mPrettyPrintXML = false;
+ }
+ }
+
+ return NS_OK;
+}
+
+bool
+nsXMLContentSink::CanStillPrettyPrint()
+{
+ return mPrettyPrintXML &&
+ (!mPrettyPrintHasFactoredElements || mPrettyPrintHasSpecialRoot);
+}
+
+nsresult
+nsXMLContentSink::MaybePrettyPrint()
+{
+ if (!CanStillPrettyPrint()) {
+ mPrettyPrintXML = false;
+
+ return NS_OK;
+ }
+
+ // stop observing in order to avoid crashing when replacing content
+ mDocument->RemoveObserver(this);
+ mIsDocumentObserver = false;
+
+ // Reenable the CSSLoader so that the prettyprinting stylesheets can load
+ if (mCSSLoader) {
+ mCSSLoader->SetEnabled(true);
+ }
+
+ RefPtr<nsXMLPrettyPrinter> printer;
+ nsresult rv = NS_NewXMLPrettyPrinter(getter_AddRefs(printer));
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ bool isPrettyPrinting;
+ rv = printer->PrettyPrint(mDocument, &isPrettyPrinting);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ mPrettyPrinting = isPrettyPrinting;
+ return NS_OK;
+}
+
+static void
+CheckXSLTParamPI(nsIDOMProcessingInstruction* aPi,
+ nsIDocumentTransformer* aProcessor,
+ nsIDocument* aDocument)
+{
+ nsAutoString target, data;
+ aPi->GetTarget(target);
+
+ // Check for namespace declarations
+ if (target.EqualsLiteral("xslt-param-namespace")) {
+ aPi->GetData(data);
+ nsAutoString prefix, namespaceAttr;
+ nsContentUtils::GetPseudoAttributeValue(data, nsGkAtoms::prefix,
+ prefix);
+ if (!prefix.IsEmpty() &&
+ nsContentUtils::GetPseudoAttributeValue(data, nsGkAtoms::_namespace,
+ namespaceAttr)) {
+ aProcessor->AddXSLTParamNamespace(prefix, namespaceAttr);
+ }
+ }
+
+ // Check for actual parameters
+ else if (target.EqualsLiteral("xslt-param")) {
+ aPi->GetData(data);
+ nsAutoString name, namespaceAttr, select, value;
+ nsContentUtils::GetPseudoAttributeValue(data, nsGkAtoms::name,
+ name);
+ nsContentUtils::GetPseudoAttributeValue(data, nsGkAtoms::_namespace,
+ namespaceAttr);
+ if (!nsContentUtils::GetPseudoAttributeValue(data, nsGkAtoms::select, select)) {
+ select.SetIsVoid(true);
+ }
+ if (!nsContentUtils::GetPseudoAttributeValue(data, nsGkAtoms::value, value)) {
+ value.SetIsVoid(true);
+ }
+ if (!name.IsEmpty()) {
+ nsCOMPtr<nsIDOMNode> doc = do_QueryInterface(aDocument);
+ aProcessor->AddXSLTParam(name, namespaceAttr, select, value, doc);
+ }
+ }
+}
+
+NS_IMETHODIMP
+nsXMLContentSink::DidBuildModel(bool aTerminated)
+{
+ if (!mParser) {
+ // If mParser is null, this parse has already been terminated and must
+ // not been terminated again. However, nsDocument may still think that
+ // the parse has not been terminated and call back into here in the case
+ // where the XML parser has finished but the XSLT transform associated
+ // with the document has not.
+ return NS_OK;
+ }
+
+ DidBuildModelImpl(aTerminated);
+
+ if (mXSLTProcessor) {
+ // stop observing in order to avoid crashing when replacing content
+ mDocument->RemoveObserver(this);
+ mIsDocumentObserver = false;
+
+ // Check for xslt-param and xslt-param-namespace PIs
+ for (nsIContent* child = mDocument->GetFirstChild();
+ child;
+ child = child->GetNextSibling()) {
+ if (child->IsNodeOfType(nsINode::ePROCESSING_INSTRUCTION)) {
+ nsCOMPtr<nsIDOMProcessingInstruction> pi = do_QueryInterface(child);
+ CheckXSLTParamPI(pi, mXSLTProcessor, mDocument);
+ }
+ else if (child->IsElement()) {
+ // Only honor PIs in the prolog
+ break;
+ }
+ }
+
+ mXSLTProcessor->SetSourceContentModel(mDocument, mDocumentChildren);
+ // Since the processor now holds a reference to us we drop our reference
+ // to it to avoid owning cycles
+ mXSLTProcessor = nullptr;
+ }
+ else {
+ // Kick off layout for non-XSLT transformed documents.
+
+ // Check if we want to prettyprint
+ MaybePrettyPrint();
+
+ bool startLayout = true;
+
+ if (mPrettyPrinting) {
+ NS_ASSERTION(!mPendingSheetCount, "Shouldn't have pending sheets here!");
+
+ // We're pretty-printing now. See whether we should wait up on
+ // stylesheet loads
+ if (mDocument->CSSLoader()->HasPendingLoads() &&
+ NS_SUCCEEDED(mDocument->CSSLoader()->AddObserver(this))) {
+ // wait for those sheets to load
+ startLayout = false;
+ }
+ }
+
+ if (startLayout) {
+ StartLayout(false);
+
+ ScrollToRef();
+ }
+
+ mDocument->RemoveObserver(this);
+ mIsDocumentObserver = false;
+
+ mDocument->EndLoad();
+ }
+
+ DropParserAndPerfHint();
+
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsXMLContentSink::OnDocumentCreated(nsIDocument* aResultDocument)
+{
+ NS_ENSURE_ARG(aResultDocument);
+
+ nsCOMPtr<nsIHTMLDocument> htmlDoc = do_QueryInterface(aResultDocument);
+ if (htmlDoc) {
+ htmlDoc->SetDocWriteDisabled(true);
+ }
+
+ nsCOMPtr<nsIContentViewer> contentViewer;
+ mDocShell->GetContentViewer(getter_AddRefs(contentViewer));
+ if (contentViewer) {
+ return contentViewer->SetDocumentInternal(aResultDocument, true);
+ }
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsXMLContentSink::OnTransformDone(nsresult aResult,
+ nsIDocument* aResultDocument)
+{
+ MOZ_ASSERT(aResultDocument, "Don't notify about transform end without a document.");
+
+ mDocumentChildren.Clear();
+
+ nsCOMPtr<nsIDOMDocument> domDoc = do_QueryInterface(aResultDocument);
+
+ nsCOMPtr<nsIContentViewer> contentViewer;
+ mDocShell->GetContentViewer(getter_AddRefs(contentViewer));
+
+ if (NS_FAILED(aResult) && contentViewer) {
+ // Transform failed.
+ aResultDocument->SetMayStartLayout(false);
+ // We have an error document.
+ contentViewer->SetDOMDocument(domDoc);
+ }
+
+ nsCOMPtr<nsIDocument> originalDocument = mDocument;
+ // Transform succeeded, or it failed and we have an error document to display.
+ mDocument = aResultDocument;
+ nsCOMPtr<nsIHTMLDocument> htmlDoc = do_QueryInterface(mDocument);
+ if (htmlDoc) {
+ htmlDoc->SetDocWriteDisabled(false);
+ }
+
+ // Notify document observers that all the content has been stuck
+ // into the document.
+ // XXX do we need to notify for things like PIs? Or just the
+ // documentElement?
+ nsIContent *rootElement = mDocument->GetRootElement();
+ if (rootElement) {
+ NS_ASSERTION(mDocument->IndexOf(rootElement) != -1,
+ "rootElement not in doc?");
+ mDocument->BeginUpdate(UPDATE_CONTENT_MODEL);
+ nsNodeUtils::ContentInserted(mDocument, rootElement,
+ mDocument->IndexOf(rootElement));
+ mDocument->EndUpdate(UPDATE_CONTENT_MODEL);
+ }
+
+ // Start the layout process
+ StartLayout(false);
+
+ ScrollToRef();
+
+ originalDocument->EndLoad();
+
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsXMLContentSink::StyleSheetLoaded(StyleSheet* aSheet,
+ bool aWasAlternate,
+ nsresult aStatus)
+{
+ if (!mPrettyPrinting) {
+ return nsContentSink::StyleSheetLoaded(aSheet, aWasAlternate, aStatus);
+ }
+
+ if (!mDocument->CSSLoader()->HasPendingLoads()) {
+ mDocument->CSSLoader()->RemoveObserver(this);
+ StartLayout(false);
+ ScrollToRef();
+ }
+
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsXMLContentSink::WillInterrupt(void)
+{
+ return WillInterruptImpl();
+}
+
+NS_IMETHODIMP
+nsXMLContentSink::WillResume(void)
+{
+ return WillResumeImpl();
+}
+
+NS_IMETHODIMP
+nsXMLContentSink::SetParser(nsParserBase* aParser)
+{
+ NS_PRECONDITION(aParser, "Should have a parser here!");
+ mParser = aParser;
+ return NS_OK;
+}
+
+nsresult
+nsXMLContentSink::CreateElement(const char16_t** aAtts, uint32_t aAttsCount,
+ mozilla::dom::NodeInfo* aNodeInfo, uint32_t aLineNumber,
+ nsIContent** aResult, bool* aAppendContent,
+ FromParser aFromParser)
+{
+ NS_ASSERTION(aNodeInfo, "can't create element without nodeinfo");
+
+ *aResult = nullptr;
+ *aAppendContent = true;
+ nsresult rv = NS_OK;
+
+ RefPtr<mozilla::dom::NodeInfo> ni = aNodeInfo;
+ RefPtr<Element> content;
+ rv = NS_NewElement(getter_AddRefs(content), ni.forget(), aFromParser);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ if (aNodeInfo->Equals(nsGkAtoms::script, kNameSpaceID_XHTML)
+ || aNodeInfo->Equals(nsGkAtoms::script, kNameSpaceID_SVG)
+ ) {
+ nsCOMPtr<nsIScriptElement> sele = do_QueryInterface(content);
+ sele->SetScriptLineNumber(aLineNumber);
+ sele->SetCreatorParser(GetParser());
+ }
+
+ // XHTML needs some special attention
+ if (aNodeInfo->NamespaceEquals(kNameSpaceID_XHTML)) {
+ mPrettyPrintHasFactoredElements = true;
+ }
+ else {
+ // If we care, find out if we just used a special factory.
+ if (!mPrettyPrintHasFactoredElements && !mPrettyPrintHasSpecialRoot &&
+ mPrettyPrintXML) {
+ mPrettyPrintHasFactoredElements =
+ nsContentUtils::NameSpaceManager()->
+ HasElementCreator(aNodeInfo->NamespaceID());
+ }
+
+ if (!aNodeInfo->NamespaceEquals(kNameSpaceID_SVG)) {
+ content.forget(aResult);
+
+ return NS_OK;
+ }
+ }
+
+ if (aNodeInfo->Equals(nsGkAtoms::link, kNameSpaceID_XHTML) ||
+ aNodeInfo->Equals(nsGkAtoms::style, kNameSpaceID_XHTML) ||
+ aNodeInfo->Equals(nsGkAtoms::style, kNameSpaceID_SVG)) {
+ nsCOMPtr<nsIStyleSheetLinkingElement> ssle(do_QueryInterface(content));
+ if (ssle) {
+ ssle->InitStyleLinkElement(false);
+ if (aFromParser) {
+ ssle->SetEnableUpdates(false);
+ }
+ if (!aNodeInfo->Equals(nsGkAtoms::link, kNameSpaceID_XHTML)) {
+ ssle->SetLineNumber(aFromParser ? aLineNumber : 0);
+ }
+ }
+ }
+
+ content.forget(aResult);
+
+ return NS_OK;
+}
+
+
+nsresult
+nsXMLContentSink::CloseElement(nsIContent* aContent)
+{
+ NS_ASSERTION(aContent, "missing element to close");
+
+ mozilla::dom::NodeInfo *nodeInfo = aContent->NodeInfo();
+
+ // Some HTML nodes need DoneAddingChildren() called to initialize
+ // properly (eg form state restoration).
+ if ((nodeInfo->NamespaceID() == kNameSpaceID_XHTML &&
+ (nodeInfo->NameAtom() == nsGkAtoms::select ||
+ nodeInfo->NameAtom() == nsGkAtoms::textarea ||
+ nodeInfo->NameAtom() == nsGkAtoms::video ||
+ nodeInfo->NameAtom() == nsGkAtoms::audio ||
+ nodeInfo->NameAtom() == nsGkAtoms::object ||
+ nodeInfo->NameAtom() == nsGkAtoms::applet))
+ || nodeInfo->NameAtom() == nsGkAtoms::title
+ ) {
+ aContent->DoneAddingChildren(HaveNotifiedForCurrentContent());
+ }
+
+ if (IsMonolithicContainer(nodeInfo)) {
+ mInMonolithicContainer--;
+ }
+
+ if (!nodeInfo->NamespaceEquals(kNameSpaceID_XHTML) &&
+ !nodeInfo->NamespaceEquals(kNameSpaceID_SVG)) {
+ return NS_OK;
+ }
+
+ if (nodeInfo->Equals(nsGkAtoms::script, kNameSpaceID_XHTML)
+ || nodeInfo->Equals(nsGkAtoms::script, kNameSpaceID_SVG)
+ ) {
+ nsCOMPtr<nsIScriptElement> sele = do_QueryInterface(aContent);
+
+ if (mPreventScriptExecution) {
+ sele->PreventExecution();
+ return NS_OK;
+ }
+
+ // Always check the clock in nsContentSink right after a script
+ StopDeflecting();
+
+ // Now tell the script that it's ready to go. This may execute the script
+ // or return true, or neither if the script doesn't need executing.
+ bool block = sele->AttemptToExecute();
+
+ // If the parser got blocked, make sure to return the appropriate rv.
+ // I'm not sure if this is actually needed or not.
+ if (mParser && !mParser->IsParserEnabled()) {
+ // XXX The HTML sink doesn't call BlockParser here, why do we?
+ GetParser()->BlockParser();
+ block = true;
+ }
+
+ return block ? NS_ERROR_HTMLPARSER_BLOCK : NS_OK;
+ }
+
+ nsresult rv = NS_OK;
+ if (nodeInfo->Equals(nsGkAtoms::meta, kNameSpaceID_XHTML) &&
+ // Need to check here to make sure this meta tag does not set
+ // mPrettyPrintXML to false when we have a special root!
+ (!mPrettyPrintXML || !mPrettyPrintHasSpecialRoot)) {
+ rv = ProcessMETATag(aContent);
+ }
+ else if (nodeInfo->Equals(nsGkAtoms::link, kNameSpaceID_XHTML) ||
+ nodeInfo->Equals(nsGkAtoms::style, kNameSpaceID_XHTML) ||
+ nodeInfo->Equals(nsGkAtoms::style, kNameSpaceID_SVG)) {
+ nsCOMPtr<nsIStyleSheetLinkingElement> ssle(do_QueryInterface(aContent));
+ if (ssle) {
+ ssle->SetEnableUpdates(true);
+ bool willNotify;
+ bool isAlternate;
+ rv = ssle->UpdateStyleSheet(mRunsToCompletion ? nullptr : this,
+ &willNotify,
+ &isAlternate);
+ if (NS_SUCCEEDED(rv) && willNotify && !isAlternate && !mRunsToCompletion) {
+ ++mPendingSheetCount;
+ mScriptLoader->AddParserBlockingScriptExecutionBlocker();
+ }
+ }
+ }
+
+ return rv;
+}
+
+nsresult
+nsXMLContentSink::AddContentAsLeaf(nsIContent *aContent)
+{
+ nsresult result = NS_OK;
+
+ if (mState == eXMLContentSinkState_InProlog) {
+ NS_ASSERTION(mDocument, "Fragments have no prolog");
+ mDocumentChildren.AppendElement(aContent);
+ } else if (mState == eXMLContentSinkState_InEpilog) {
+ NS_ASSERTION(mDocument, "Fragments have no epilog");
+ if (mXSLTProcessor) {
+ mDocumentChildren.AppendElement(aContent);
+ } else {
+ mDocument->AppendChildTo(aContent, false);
+ }
+ } else {
+ nsCOMPtr<nsIContent> parent = GetCurrentContent();
+
+ if (parent) {
+ result = parent->AppendChildTo(aContent, false);
+ }
+ }
+ return result;
+}
+
+// Create an XML parser and an XSL content sink and start parsing
+// the XSL stylesheet located at the given URI.
+nsresult
+nsXMLContentSink::LoadXSLStyleSheet(nsIURI* aUrl)
+{
+ nsCOMPtr<nsIDocumentTransformer> processor =
+ do_CreateInstance("@mozilla.org/document-transformer;1?type=xslt");
+ if (!processor) {
+ // No XSLT processor available, continue normal document loading
+ return NS_OK;
+ }
+
+ processor->SetTransformObserver(this);
+
+ if (NS_SUCCEEDED(processor->LoadStyleSheet(aUrl, mDocument))) {
+ mXSLTProcessor.swap(processor);
+ }
+
+ // Intentionally ignore errors here, we should continue loading the
+ // XML document whether we're able to load the XSLT stylesheet or
+ // not.
+
+ return NS_OK;
+}
+
+nsresult
+nsXMLContentSink::ProcessStyleLink(nsIContent* aElement,
+ const nsSubstring& aHref,
+ bool aAlternate,
+ const nsSubstring& aTitle,
+ const nsSubstring& aType,
+ const nsSubstring& aMedia)
+{
+ nsresult rv = NS_OK;
+ mPrettyPrintXML = false;
+
+ nsAutoCString cmd;
+ if (mParser)
+ GetParser()->GetCommand(cmd);
+ if (cmd.EqualsASCII(kLoadAsData))
+ return NS_OK; // Do not load stylesheets when loading as data
+
+ NS_ConvertUTF16toUTF8 type(aType);
+ if (type.EqualsIgnoreCase(TEXT_XSL) ||
+ type.EqualsIgnoreCase(APPLICATION_XSLT_XML) ||
+ type.EqualsIgnoreCase(TEXT_XML) ||
+ type.EqualsIgnoreCase(APPLICATION_XML)) {
+ if (aAlternate) {
+ // don't load alternate XSLT
+ return NS_OK;
+ }
+ // LoadXSLStyleSheet needs a mDocShell.
+ if (!mDocShell)
+ return NS_OK;
+
+ nsCOMPtr<nsIURI> url;
+ rv = NS_NewURI(getter_AddRefs(url), aHref, nullptr,
+ mDocument->GetDocBaseURI());
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ // Do security check
+ nsIScriptSecurityManager *secMan = nsContentUtils::GetSecurityManager();
+ rv = secMan->
+ CheckLoadURIWithPrincipal(mDocument->NodePrincipal(), url,
+ nsIScriptSecurityManager::ALLOW_CHROME);
+ NS_ENSURE_SUCCESS(rv, NS_OK);
+
+ // Do content policy check
+ int16_t decision = nsIContentPolicy::ACCEPT;
+ rv = NS_CheckContentLoadPolicy(nsIContentPolicy::TYPE_XSLT,
+ url,
+ mDocument->NodePrincipal(),
+ aElement,
+ type,
+ nullptr,
+ &decision,
+ nsContentUtils::GetContentPolicy(),
+ nsContentUtils::GetSecurityManager());
+
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ if (NS_CP_REJECTED(decision)) {
+ return NS_OK;
+ }
+
+ return LoadXSLStyleSheet(url);
+ }
+
+ // Let nsContentSink deal with css.
+ rv = nsContentSink::ProcessStyleLink(aElement, aHref, aAlternate,
+ aTitle, aType, aMedia);
+
+ // nsContentSink::ProcessStyleLink handles the bookkeeping here wrt
+ // pending sheets.
+
+ return rv;
+}
+
+NS_IMETHODIMP
+nsXMLContentSink::SetDocumentCharset(nsACString& aCharset)
+{
+ if (mDocument) {
+ mDocument->SetDocumentCharacterSet(aCharset);
+ }
+
+ return NS_OK;
+}
+
+nsISupports *
+nsXMLContentSink::GetTarget()
+{
+ return mDocument;
+}
+
+bool
+nsXMLContentSink::IsScriptExecuting()
+{
+ return IsScriptExecutingImpl();
+}
+
+nsresult
+nsXMLContentSink::FlushText(bool aReleaseTextNode)
+{
+ nsresult rv = NS_OK;
+
+ if (mTextLength != 0) {
+ if (mLastTextNode) {
+ bool notify = HaveNotifiedForCurrentContent();
+ // We could probably always increase mInNotification here since
+ // if AppendText doesn't notify it shouldn't trigger evil code.
+ // But just in case it does, we don't want to mask any notifications.
+ if (notify) {
+ ++mInNotification;
+ }
+ rv = mLastTextNode->AppendText(mText, mTextLength, notify);
+ if (notify) {
+ --mInNotification;
+ }
+
+ mTextLength = 0;
+ } else {
+ RefPtr<nsTextNode> textContent = new nsTextNode(mNodeInfoManager);
+
+ mLastTextNode = textContent;
+
+ // Set the text in the text node
+ textContent->SetText(mText, mTextLength, false);
+ mTextLength = 0;
+
+ // Add text to its parent
+ rv = AddContentAsLeaf(textContent);
+ }
+ }
+
+ if (aReleaseTextNode) {
+ mLastTextNode = nullptr;
+ }
+
+ return rv;
+}
+
+nsIContent*
+nsXMLContentSink::GetCurrentContent()
+{
+ if (mContentStack.Length() == 0) {
+ return nullptr;
+ }
+ return GetCurrentStackNode()->mContent;
+}
+
+StackNode*
+nsXMLContentSink::GetCurrentStackNode()
+{
+ int32_t count = mContentStack.Length();
+ return count != 0 ? &mContentStack[count-1] : nullptr;
+}
+
+
+nsresult
+nsXMLContentSink::PushContent(nsIContent *aContent)
+{
+ NS_PRECONDITION(aContent, "Null content being pushed!");
+ StackNode *sn = mContentStack.AppendElement();
+ NS_ENSURE_TRUE(sn, NS_ERROR_OUT_OF_MEMORY);
+
+ nsIContent* contentToPush = aContent;
+
+ // When an XML parser would append a node to a template element, it
+ // must instead append it to the template element's template contents.
+ if (contentToPush->IsHTMLElement(nsGkAtoms::_template)) {
+ HTMLTemplateElement* templateElement =
+ static_cast<HTMLTemplateElement*>(contentToPush);
+ contentToPush = templateElement->Content();
+ }
+
+ sn->mContent = contentToPush;
+ sn->mNumFlushed = 0;
+ return NS_OK;
+}
+
+void
+nsXMLContentSink::PopContent()
+{
+ int32_t count = mContentStack.Length();
+
+ if (count == 0) {
+ NS_WARNING("Popping empty stack");
+ return;
+ }
+
+ mContentStack.RemoveElementAt(count - 1);
+}
+
+bool
+nsXMLContentSink::HaveNotifiedForCurrentContent() const
+{
+ uint32_t stackLength = mContentStack.Length();
+ if (stackLength) {
+ const StackNode& stackNode = mContentStack[stackLength - 1];
+ nsIContent* parent = stackNode.mContent;
+ return stackNode.mNumFlushed == parent->GetChildCount();
+ }
+ return true;
+}
+
+void
+nsXMLContentSink::MaybeStartLayout(bool aIgnorePendingSheets)
+{
+ // XXXbz if aIgnorePendingSheets is true, what should we do when
+ // mXSLTProcessor or CanStillPrettyPrint()?
+ if (mLayoutStarted || mXSLTProcessor || CanStillPrettyPrint()) {
+ return;
+ }
+ StartLayout(aIgnorePendingSheets);
+}
+
+////////////////////////////////////////////////////////////////////////
+
+bool
+nsXMLContentSink::SetDocElement(int32_t aNameSpaceID,
+ nsIAtom* aTagName,
+ nsIContent *aContent)
+{
+ if (mDocElement)
+ return false;
+
+ mDocElement = aContent;
+
+ if (mXSLTProcessor) {
+ mDocumentChildren.AppendElement(aContent);
+ return true;
+ }
+
+ if (!mDocumentChildren.IsEmpty()) {
+ for (nsIContent* child : mDocumentChildren) {
+ mDocument->AppendChildTo(child, false);
+ }
+ mDocumentChildren.Clear();
+ }
+
+ // check for root elements that needs special handling for
+ // prettyprinting
+ if ((aNameSpaceID == kNameSpaceID_XBL &&
+ aTagName == nsGkAtoms::bindings) ||
+ (aNameSpaceID == kNameSpaceID_XSLT &&
+ (aTagName == nsGkAtoms::stylesheet ||
+ aTagName == nsGkAtoms::transform))) {
+ mPrettyPrintHasSpecialRoot = true;
+ if (mPrettyPrintXML) {
+ // In this case, disable script execution, stylesheet
+ // loading, and auto XLinks since we plan to prettyprint.
+ mDocument->ScriptLoader()->SetEnabled(false);
+ if (mCSSLoader) {
+ mCSSLoader->SetEnabled(false);
+ }
+ }
+ }
+
+ nsresult rv = mDocument->AppendChildTo(mDocElement, NotifyForDocElement());
+ if (NS_FAILED(rv)) {
+ // If we return false here, the caller will bail out because it won't
+ // find a parent content node to append to, which is fine.
+ return false;
+ }
+
+ if (aTagName == nsGkAtoms::html &&
+ aNameSpaceID == kNameSpaceID_XHTML) {
+ ProcessOfflineManifest(aContent);
+ }
+
+ return true;
+}
+
+NS_IMETHODIMP
+nsXMLContentSink::HandleStartElement(const char16_t *aName,
+ const char16_t **aAtts,
+ uint32_t aAttsCount,
+ uint32_t aLineNumber)
+{
+ return HandleStartElement(aName, aAtts, aAttsCount, aLineNumber,
+ true);
+}
+
+nsresult
+nsXMLContentSink::HandleStartElement(const char16_t *aName,
+ const char16_t **aAtts,
+ uint32_t aAttsCount,
+ uint32_t aLineNumber,
+ bool aInterruptable)
+{
+ NS_PRECONDITION(aAttsCount % 2 == 0, "incorrect aAttsCount");
+ // Adjust aAttsCount so it's the actual number of attributes
+ aAttsCount /= 2;
+
+ nsresult result = NS_OK;
+ bool appendContent = true;
+ nsCOMPtr<nsIContent> content;
+
+ // XXX Hopefully the parser will flag this before we get
+ // here. If we're in the epilog, there should be no
+ // new elements
+ MOZ_ASSERT(eXMLContentSinkState_InEpilog != mState);
+
+ FlushText();
+ DidAddContent();
+
+ mState = eXMLContentSinkState_InDocumentElement;
+
+ int32_t nameSpaceID;
+ nsCOMPtr<nsIAtom> prefix, localName;
+ nsContentUtils::SplitExpatName(aName, getter_AddRefs(prefix),
+ getter_AddRefs(localName), &nameSpaceID);
+
+ if (!OnOpenContainer(aAtts, aAttsCount, nameSpaceID, localName, aLineNumber)) {
+ return NS_OK;
+ }
+
+ RefPtr<mozilla::dom::NodeInfo> nodeInfo;
+ nodeInfo = mNodeInfoManager->GetNodeInfo(localName, prefix, nameSpaceID,
+ nsIDOMNode::ELEMENT_NODE);
+
+ result = CreateElement(aAtts, aAttsCount, nodeInfo, aLineNumber,
+ getter_AddRefs(content), &appendContent,
+ FROM_PARSER_NETWORK);
+ NS_ENSURE_SUCCESS(result, result);
+
+ // Have to do this before we push the new content on the stack... and have to
+ // do that before we set attributes, call BindToTree, etc. Ideally we'd push
+ // on the stack inside CreateElement (which is effectively what the HTML sink
+ // does), but that's hard with all the subclass overrides going on.
+ nsCOMPtr<nsIContent> parent = GetCurrentContent();
+
+ result = PushContent(content);
+ NS_ENSURE_SUCCESS(result, result);
+
+ // Set the attributes on the new content element
+ result = AddAttributes(aAtts, content);
+
+ if (NS_OK == result) {
+ // Store the element
+ if (!SetDocElement(nameSpaceID, localName, content) && appendContent) {
+ NS_ENSURE_TRUE(parent, NS_ERROR_UNEXPECTED);
+
+ parent->AppendChildTo(content, false);
+ }
+ }
+
+ // Some HTML nodes need DoneCreatingElement() called to initialize
+ // properly (eg form state restoration).
+ if (nodeInfo->NamespaceID() == kNameSpaceID_XHTML) {
+ if (nodeInfo->NameAtom() == nsGkAtoms::input ||
+ nodeInfo->NameAtom() == nsGkAtoms::button ||
+ nodeInfo->NameAtom() == nsGkAtoms::menuitem ||
+ nodeInfo->NameAtom() == nsGkAtoms::audio ||
+ nodeInfo->NameAtom() == nsGkAtoms::video) {
+ content->DoneCreatingElement();
+ } else if (nodeInfo->NameAtom() == nsGkAtoms::head && !mCurrentHead) {
+ mCurrentHead = content;
+ }
+ }
+
+ if (IsMonolithicContainer(nodeInfo)) {
+ mInMonolithicContainer++;
+ }
+
+ if (!mXSLTProcessor) {
+ if (content == mDocElement) {
+ NotifyDocElementCreated(mDocument);
+ } else if (!mCurrentHead) {
+ // This isn't the root and we're not inside an XHTML <head>.
+ // Might need to start layout
+ MaybeStartLayout(false);
+ }
+ }
+
+ return aInterruptable && NS_SUCCEEDED(result) ? DidProcessATokenImpl() :
+ result;
+}
+
+NS_IMETHODIMP
+nsXMLContentSink::HandleEndElement(const char16_t *aName)
+{
+ return HandleEndElement(aName, true);
+}
+
+nsresult
+nsXMLContentSink::HandleEndElement(const char16_t *aName,
+ bool aInterruptable)
+{
+ nsresult result = NS_OK;
+
+ // XXX Hopefully the parser will flag this before we get
+ // here. If we're in the prolog or epilog, there should be
+ // no close tags for elements.
+ MOZ_ASSERT(eXMLContentSinkState_InDocumentElement == mState);
+
+ FlushText();
+
+ StackNode* sn = GetCurrentStackNode();
+ if (!sn) {
+ return NS_ERROR_UNEXPECTED;
+ }
+
+ nsCOMPtr<nsIContent> content;
+ sn->mContent.swap(content);
+ uint32_t numFlushed = sn->mNumFlushed;
+
+ PopContent();
+ NS_ASSERTION(content, "failed to pop content");
+#ifdef DEBUG
+ // Check that we're closing the right thing
+ nsCOMPtr<nsIAtom> debugNameSpacePrefix, debugTagAtom;
+ int32_t debugNameSpaceID;
+ nsContentUtils::SplitExpatName(aName, getter_AddRefs(debugNameSpacePrefix),
+ getter_AddRefs(debugTagAtom),
+ &debugNameSpaceID);
+ // Check if we are closing a template element because template
+ // elements do not get pushed on the stack, the template
+ // element content is pushed instead.
+ bool isTemplateElement = debugTagAtom == nsGkAtoms::_template &&
+ debugNameSpaceID == kNameSpaceID_XHTML;
+ NS_ASSERTION(content->NodeInfo()->Equals(debugTagAtom, debugNameSpaceID) ||
+ (debugNameSpaceID == kNameSpaceID_MathML &&
+ content->NodeInfo()->NamespaceID() == kNameSpaceID_disabled_MathML &&
+ content->NodeInfo()->Equals(debugTagAtom)) ||
+ isTemplateElement, "Wrong element being closed");
+#endif
+
+ result = CloseElement(content);
+
+ if (mCurrentHead == content) {
+ mCurrentHead = nullptr;
+ }
+
+ if (mDocElement == content) {
+ // XXXbz for roots that don't want to be appended on open, we
+ // probably need to deal here.... (and stop appending them on open).
+ mState = eXMLContentSinkState_InEpilog;
+
+ // We might have had no occasion to start layout yet. Do so now.
+ MaybeStartLayout(false);
+ }
+
+ int32_t stackLen = mContentStack.Length();
+ if (mNotifyLevel >= stackLen) {
+ if (numFlushed < content->GetChildCount()) {
+ NotifyAppend(content, numFlushed);
+ }
+ mNotifyLevel = stackLen - 1;
+ }
+ DidAddContent();
+
+ if (content->IsSVGElement(nsGkAtoms::svg)) {
+ FlushTags();
+ nsCOMPtr<nsIRunnable> event = new nsHtml5SVGLoadDispatcher(content);
+ if (NS_FAILED(NS_DispatchToMainThread(event))) {
+ NS_WARNING("failed to dispatch svg load dispatcher");
+ }
+ }
+
+ return aInterruptable && NS_SUCCEEDED(result) ? DidProcessATokenImpl() :
+ result;
+}
+
+NS_IMETHODIMP
+nsXMLContentSink::HandleComment(const char16_t *aName)
+{
+ FlushText();
+
+ RefPtr<Comment> comment = new Comment(mNodeInfoManager);
+ comment->SetText(nsDependentString(aName), false);
+ nsresult rv = AddContentAsLeaf(comment);
+ DidAddContent();
+
+ return NS_SUCCEEDED(rv) ? DidProcessATokenImpl() : rv;
+}
+
+NS_IMETHODIMP
+nsXMLContentSink::HandleCDataSection(const char16_t *aData,
+ uint32_t aLength)
+{
+ // XSLT doesn't differentiate between text and cdata and wants adjacent
+ // textnodes merged, so add as text.
+ if (mXSLTProcessor) {
+ return AddText(aData, aLength);
+ }
+
+ FlushText();
+
+ RefPtr<CDATASection> cdata = new CDATASection(mNodeInfoManager);
+ cdata->SetText(aData, aLength, false);
+ nsresult rv = AddContentAsLeaf(cdata);
+ DidAddContent();
+
+ return NS_SUCCEEDED(rv) ? DidProcessATokenImpl() : rv;
+}
+
+NS_IMETHODIMP
+nsXMLContentSink::HandleDoctypeDecl(const nsAString & aSubset,
+ const nsAString & aName,
+ const nsAString & aSystemId,
+ const nsAString & aPublicId,
+ nsISupports* aCatalogData)
+{
+ FlushText();
+
+ nsresult rv = NS_OK;
+
+ NS_ASSERTION(mDocument, "Shouldn't get here from a document fragment");
+
+ nsCOMPtr<nsIAtom> name = NS_Atomize(aName);
+ NS_ENSURE_TRUE(name, NS_ERROR_OUT_OF_MEMORY);
+
+ // Create a new doctype node
+ nsCOMPtr<nsIDOMDocumentType> docType;
+ rv = NS_NewDOMDocumentType(getter_AddRefs(docType), mNodeInfoManager,
+ name, aPublicId, aSystemId, aSubset);
+ if (NS_FAILED(rv) || !docType) {
+ return rv;
+ }
+
+ MOZ_ASSERT(!aCatalogData, "Need to add back support for catalog style "
+ "sheets");
+
+ nsCOMPtr<nsIContent> content = do_QueryInterface(docType);
+ NS_ASSERTION(content, "doctype isn't content?");
+
+ mDocumentChildren.AppendElement(content);
+ DidAddContent();
+ return DidProcessATokenImpl();
+}
+
+NS_IMETHODIMP
+nsXMLContentSink::HandleCharacterData(const char16_t *aData,
+ uint32_t aLength)
+{
+ return HandleCharacterData(aData, aLength, true);
+}
+
+nsresult
+nsXMLContentSink::HandleCharacterData(const char16_t *aData, uint32_t aLength,
+ bool aInterruptable)
+{
+ nsresult rv = NS_OK;
+ if (aData && mState != eXMLContentSinkState_InProlog &&
+ mState != eXMLContentSinkState_InEpilog) {
+ rv = AddText(aData, aLength);
+ }
+ return aInterruptable && NS_SUCCEEDED(rv) ? DidProcessATokenImpl() : rv;
+}
+
+NS_IMETHODIMP
+nsXMLContentSink::HandleProcessingInstruction(const char16_t *aTarget,
+ const char16_t *aData)
+{
+ FlushText();
+
+ const nsDependentString target(aTarget);
+ const nsDependentString data(aData);
+
+ nsCOMPtr<nsIContent> node =
+ NS_NewXMLProcessingInstruction(mNodeInfoManager, target, data);
+
+ nsCOMPtr<nsIStyleSheetLinkingElement> ssle(do_QueryInterface(node));
+ if (ssle) {
+ ssle->InitStyleLinkElement(false);
+ ssle->SetEnableUpdates(false);
+ mPrettyPrintXML = false;
+ }
+
+ nsresult rv = AddContentAsLeaf(node);
+ NS_ENSURE_SUCCESS(rv, rv);
+ DidAddContent();
+
+ if (ssle) {
+ // This is an xml-stylesheet processing instruction... but it might not be
+ // a CSS one if the type is set to something else.
+ ssle->SetEnableUpdates(true);
+ bool willNotify;
+ bool isAlternate;
+ rv = ssle->UpdateStyleSheet(mRunsToCompletion ? nullptr : this,
+ &willNotify,
+ &isAlternate);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ if (willNotify) {
+ // Successfully started a stylesheet load
+ if (!isAlternate && !mRunsToCompletion) {
+ ++mPendingSheetCount;
+ mScriptLoader->AddParserBlockingScriptExecutionBlocker();
+ }
+
+ return NS_OK;
+ }
+ }
+
+ // If it's not a CSS stylesheet PI...
+ nsAutoString type;
+ nsContentUtils::GetPseudoAttributeValue(data, nsGkAtoms::type, type);
+
+ if (mState != eXMLContentSinkState_InProlog ||
+ !target.EqualsLiteral("xml-stylesheet") ||
+ type.IsEmpty() ||
+ type.LowerCaseEqualsLiteral("text/css")) {
+ return DidProcessATokenImpl();
+ }
+
+ nsAutoString href, title, media;
+ bool isAlternate = false;
+
+ // If there was no href, we can't do anything with this PI
+ if (!ParsePIData(data, href, title, media, isAlternate)) {
+ return DidProcessATokenImpl();
+ }
+
+ rv = ProcessStyleLink(node, href, isAlternate, title, type, media);
+ return NS_SUCCEEDED(rv) ? DidProcessATokenImpl() : rv;
+}
+
+/* static */
+bool
+nsXMLContentSink::ParsePIData(const nsString &aData, nsString &aHref,
+ nsString &aTitle, nsString &aMedia,
+ bool &aIsAlternate)
+{
+ // If there was no href, we can't do anything with this PI
+ if (!nsContentUtils::GetPseudoAttributeValue(aData, nsGkAtoms::href, aHref)) {
+ return false;
+ }
+
+ nsContentUtils::GetPseudoAttributeValue(aData, nsGkAtoms::title, aTitle);
+
+ nsContentUtils::GetPseudoAttributeValue(aData, nsGkAtoms::media, aMedia);
+
+ nsAutoString alternate;
+ nsContentUtils::GetPseudoAttributeValue(aData,
+ nsGkAtoms::alternate,
+ alternate);
+
+ aIsAlternate = alternate.EqualsLiteral("yes");
+
+ return true;
+}
+
+NS_IMETHODIMP
+nsXMLContentSink::HandleXMLDeclaration(const char16_t *aVersion,
+ const char16_t *aEncoding,
+ int32_t aStandalone)
+{
+ mDocument->SetXMLDeclaration(aVersion, aEncoding, aStandalone);
+
+ return DidProcessATokenImpl();
+}
+
+NS_IMETHODIMP
+nsXMLContentSink::ReportError(const char16_t* aErrorText,
+ const char16_t* aSourceText,
+ nsIScriptError *aError,
+ bool *_retval)
+{
+ NS_PRECONDITION(aError && aSourceText && aErrorText, "Check arguments!!!");
+ nsresult rv = NS_OK;
+
+ // The expat driver should report the error. We're just cleaning up the mess.
+ *_retval = true;
+
+ mPrettyPrintXML = false;
+
+ mState = eXMLContentSinkState_InProlog;
+
+ // XXX need to stop scripts here -- hsivonen
+
+ // stop observing in order to avoid crashing when removing content
+ mDocument->RemoveObserver(this);
+ mIsDocumentObserver = false;
+
+ // Clear the current content
+ mDocumentChildren.Clear();
+ nsCOMPtr<nsIDOMNode> node(do_QueryInterface(mDocument));
+ if (node) {
+ for (;;) {
+ nsCOMPtr<nsIDOMNode> child, dummy;
+ node->GetLastChild(getter_AddRefs(child));
+ if (!child)
+ break;
+ node->RemoveChild(child, getter_AddRefs(dummy));
+ }
+ }
+ mDocElement = nullptr;
+
+ // Clear any buffered-up text we have. It's enough to set the length to 0.
+ // The buffer itself is allocated when we're created and deleted in our
+ // destructor, so don't mess with it.
+ mTextLength = 0;
+
+ if (mXSLTProcessor) {
+ // Get rid of the XSLT processor.
+ mXSLTProcessor->CancelLoads();
+ mXSLTProcessor = nullptr;
+ }
+
+ // release the nodes on stack
+ mContentStack.Clear();
+ mNotifyLevel = 0;
+
+ // return leaving the document empty if we're asked to not add a <parsererror> root node
+ if (mDocument->SuppressParserErrorElement()) {
+ return NS_OK;
+ }
+
+ // prepare to set <parsererror> as the document root
+ rv = HandleProcessingInstruction(u"xml-stylesheet",
+ u"href=\"chrome://global/locale/intl.css\" type=\"text/css\"");
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ const char16_t* noAtts[] = { 0, 0 };
+
+ NS_NAMED_LITERAL_STRING(errorNs,
+ "http://www.mozilla.org/newlayout/xml/parsererror.xml");
+
+ nsAutoString parsererror(errorNs);
+ parsererror.Append((char16_t)0xFFFF);
+ parsererror.AppendLiteral("parsererror");
+
+ rv = HandleStartElement(parsererror.get(), noAtts, 0, (uint32_t)-1,
+ false);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ rv = HandleCharacterData(aErrorText, NS_strlen(aErrorText), false);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ nsAutoString sourcetext(errorNs);
+ sourcetext.Append((char16_t)0xFFFF);
+ sourcetext.AppendLiteral("sourcetext");
+
+ rv = HandleStartElement(sourcetext.get(), noAtts, 0, (uint32_t)-1,
+ false);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ rv = HandleCharacterData(aSourceText, NS_strlen(aSourceText), false);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ rv = HandleEndElement(sourcetext.get(), false);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ rv = HandleEndElement(parsererror.get(), false);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ FlushTags();
+
+ return NS_OK;
+}
+
+nsresult
+nsXMLContentSink::AddAttributes(const char16_t** aAtts,
+ nsIContent* aContent)
+{
+ // Add tag attributes to the content attributes
+ nsCOMPtr<nsIAtom> prefix, localName;
+ while (*aAtts) {
+ int32_t nameSpaceID;
+ nsContentUtils::SplitExpatName(aAtts[0], getter_AddRefs(prefix),
+ getter_AddRefs(localName), &nameSpaceID);
+
+ // Add attribute to content
+ aContent->SetAttr(nameSpaceID, localName, prefix,
+ nsDependentString(aAtts[1]), false);
+ aAtts += 2;
+ }
+
+ return NS_OK;
+}
+
+#define NS_ACCUMULATION_BUFFER_SIZE 4096
+
+nsresult
+nsXMLContentSink::AddText(const char16_t* aText,
+ int32_t aLength)
+{
+ // Copy data from string into our buffer; flush buffer when it fills up.
+ int32_t offset = 0;
+ while (0 != aLength) {
+ int32_t amount = NS_ACCUMULATION_BUFFER_SIZE - mTextLength;
+ if (0 == amount) {
+ nsresult rv = FlushText(false);
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ return rv;
+ }
+ MOZ_ASSERT(mTextLength == 0);
+ amount = NS_ACCUMULATION_BUFFER_SIZE;
+ }
+
+ if (amount > aLength) {
+ amount = aLength;
+ }
+ memcpy(&mText[mTextLength], &aText[offset], sizeof(char16_t) * amount);
+ mTextLength += amount;
+ offset += amount;
+ aLength -= amount;
+ }
+
+ return NS_OK;
+}
+
+void
+nsXMLContentSink::FlushPendingNotifications(mozFlushType aType)
+{
+ // Only flush tags if we're not doing the notification ourselves
+ // (since we aren't reentrant)
+ if (!mInNotification) {
+ if (mIsDocumentObserver) {
+ // Only flush if we're still a document observer (so that our child
+ // counts should be correct).
+ if (aType >= Flush_ContentAndNotify) {
+ FlushTags();
+ }
+ else {
+ FlushText(false);
+ }
+ }
+ if (aType >= Flush_InterruptibleLayout) {
+ // Make sure that layout has started so that the reflow flush
+ // will actually happen.
+ MaybeStartLayout(true);
+ }
+ }
+}
+
+/**
+ * NOTE!! Forked from SinkContext. Please keep in sync.
+ *
+ * Flush all elements that have been seen so far such that
+ * they are visible in the tree. Specifically, make sure
+ * that they are all added to their respective parents.
+ * Also, do notification at the top for all content that
+ * has been newly added so that the frame tree is complete.
+ */
+nsresult
+nsXMLContentSink::FlushTags()
+{
+ mDeferredFlushTags = false;
+ bool oldBeganUpdate = mBeganUpdate;
+ uint32_t oldUpdates = mUpdatesInNotification;
+
+ mUpdatesInNotification = 0;
+ ++mInNotification;
+ {
+ // Scope so we call EndUpdate before we decrease mInNotification
+ mozAutoDocUpdate updateBatch(mDocument, UPDATE_CONTENT_MODEL, true);
+ mBeganUpdate = true;
+
+ // Don't release last text node in case we need to add to it again
+ FlushText(false);
+
+ // Start from the base of the stack (growing downward) and do
+ // a notification from the node that is closest to the root of
+ // tree for any content that has been added.
+
+ int32_t stackPos;
+ int32_t stackLen = mContentStack.Length();
+ bool flushed = false;
+ uint32_t childCount;
+ nsIContent* content;
+
+ for (stackPos = 0; stackPos < stackLen; ++stackPos) {
+ content = mContentStack[stackPos].mContent;
+ childCount = content->GetChildCount();
+
+ if (!flushed && (mContentStack[stackPos].mNumFlushed < childCount)) {
+ NotifyAppend(content, mContentStack[stackPos].mNumFlushed);
+ flushed = true;
+ }
+
+ mContentStack[stackPos].mNumFlushed = childCount;
+ }
+ mNotifyLevel = stackLen - 1;
+ }
+ --mInNotification;
+
+ if (mUpdatesInNotification > 1) {
+ UpdateChildCounts();
+ }
+
+ mUpdatesInNotification = oldUpdates;
+ mBeganUpdate = oldBeganUpdate;
+
+ return NS_OK;
+}
+
+/**
+ * NOTE!! Forked from SinkContext. Please keep in sync.
+ */
+void
+nsXMLContentSink::UpdateChildCounts()
+{
+ // Start from the top of the stack (growing upwards) and see if any
+ // new content has been appended. If so, we recognize that reflows
+ // have been generated for it and we should make sure that no
+ // further reflows occur. Note that we have to include stackPos == 0
+ // to properly notify on kids of <html>.
+ int32_t stackLen = mContentStack.Length();
+ int32_t stackPos = stackLen - 1;
+ while (stackPos >= 0) {
+ StackNode & node = mContentStack[stackPos];
+ node.mNumFlushed = node.mContent->GetChildCount();
+
+ stackPos--;
+ }
+ mNotifyLevel = stackLen - 1;
+}
+
+bool
+nsXMLContentSink::IsMonolithicContainer(mozilla::dom::NodeInfo* aNodeInfo)
+{
+ return ((aNodeInfo->NamespaceID() == kNameSpaceID_XHTML &&
+ (aNodeInfo->NameAtom() == nsGkAtoms::tr ||
+ aNodeInfo->NameAtom() == nsGkAtoms::select ||
+ aNodeInfo->NameAtom() == nsGkAtoms::object ||
+ aNodeInfo->NameAtom() == nsGkAtoms::applet)) ||
+ (aNodeInfo->NamespaceID() == kNameSpaceID_MathML &&
+ (aNodeInfo->NameAtom() == nsGkAtoms::math))
+ );
+}
+
+void
+nsXMLContentSink::ContinueInterruptedParsingIfEnabled()
+{
+ if (mParser && mParser->IsParserEnabled()) {
+ GetParser()->ContinueInterruptedParsing();
+ }
+}
+
+void
+nsXMLContentSink::ContinueInterruptedParsingAsync()
+{
+ nsCOMPtr<nsIRunnable> ev = NewRunnableMethod(this,
+ &nsXMLContentSink::ContinueInterruptedParsingIfEnabled);
+
+ NS_DispatchToCurrentThread(ev);
+}
+
+nsIParser*
+nsXMLContentSink::GetParser()
+{
+ return static_cast<nsIParser*>(mParser.get());
+}