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-rw-r--r--dom/html/nsHTMLContentSink.cpp1106
1 files changed, 1106 insertions, 0 deletions
diff --git a/dom/html/nsHTMLContentSink.cpp b/dom/html/nsHTMLContentSink.cpp
new file mode 100644
index 000000000..3e8e019b8
--- /dev/null
+++ b/dom/html/nsHTMLContentSink.cpp
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+/* -*- 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/. */
+
+/**
+ * This file is near-OBSOLETE. It is used for about:blank only and for the
+ * HTML element factory.
+ * Don't bother adding new stuff in this file.
+ */
+
+#include "mozilla/ArrayUtils.h"
+
+#include "nsContentSink.h"
+#include "nsCOMPtr.h"
+#include "nsReadableUtils.h"
+#include "nsUnicharUtils.h"
+#include "nsIHTMLContentSink.h"
+#include "nsIInterfaceRequestor.h"
+#include "nsIInterfaceRequestorUtils.h"
+#include "nsScriptLoader.h"
+#include "nsIURI.h"
+#include "nsIContentViewer.h"
+#include "mozilla/dom/NodeInfo.h"
+#include "nsToken.h"
+#include "nsIAppShell.h"
+#include "nsCRT.h"
+#include "prtime.h"
+#include "mozilla/Logging.h"
+#include "nsNodeUtils.h"
+#include "nsIContent.h"
+#include "mozilla/dom/Element.h"
+#include "mozilla/Preferences.h"
+
+#include "nsGenericHTMLElement.h"
+
+#include "nsIDOMDocument.h"
+#include "nsIDOMDocumentType.h"
+#include "nsIScriptElement.h"
+
+#include "nsIComponentManager.h"
+#include "nsIServiceManager.h"
+
+#include "nsGkAtoms.h"
+#include "nsContentUtils.h"
+#include "nsIChannel.h"
+#include "nsIHttpChannel.h"
+#include "nsIDocShell.h"
+#include "nsIDocument.h"
+#include "nsStubDocumentObserver.h"
+#include "nsIHTMLDocument.h"
+#include "nsIDOMHTMLMapElement.h"
+#include "nsICookieService.h"
+#include "nsTArray.h"
+#include "nsIScriptSecurityManager.h"
+#include "nsIPrincipal.h"
+#include "nsTextFragment.h"
+#include "nsIScriptGlobalObject.h"
+#include "nsNameSpaceManager.h"
+
+#include "nsIParserService.h"
+
+#include "nsIStyleSheetLinkingElement.h"
+#include "nsITimer.h"
+#include "nsError.h"
+#include "nsContentPolicyUtils.h"
+#include "nsIScriptContext.h"
+#include "nsStyleLinkElement.h"
+
+#include "nsWeakReference.h" // nsHTMLElementFactory supports weak references
+#include "nsIPrompt.h"
+#include "nsLayoutCID.h"
+#include "nsIDocShellTreeItem.h"
+
+#include "nsEscape.h"
+#include "nsNodeInfoManager.h"
+#include "nsContentCreatorFunctions.h"
+#include "mozAutoDocUpdate.h"
+#include "nsTextNode.h"
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+//----------------------------------------------------------------------
+
+typedef nsGenericHTMLElement*
+ (*contentCreatorCallback)(already_AddRefed<mozilla::dom::NodeInfo>&&,
+ FromParser aFromParser);
+
+nsGenericHTMLElement*
+NS_NewHTMLNOTUSEDElement(already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo,
+ FromParser aFromParser)
+{
+ NS_NOTREACHED("The element ctor should never be called");
+ return nullptr;
+}
+
+#define HTML_TAG(_tag, _classname) NS_NewHTML##_classname##Element,
+#define HTML_HTMLELEMENT_TAG(_tag) NS_NewHTMLElement,
+#define HTML_OTHER(_tag) NS_NewHTMLNOTUSEDElement,
+static const contentCreatorCallback sContentCreatorCallbacks[] = {
+ NS_NewHTMLUnknownElement,
+#include "nsHTMLTagList.h"
+#undef HTML_TAG
+#undef HTML_HTMLELEMENT_TAG
+#undef HTML_OTHER
+ NS_NewHTMLUnknownElement
+};
+
+class SinkContext;
+class HTMLContentSink;
+
+/**
+ * This class is near-OBSOLETE. It is used for about:blank only.
+ * Don't bother adding new stuff in this file.
+ */
+class HTMLContentSink : public nsContentSink,
+ public nsIHTMLContentSink
+{
+public:
+ friend class SinkContext;
+
+ HTMLContentSink();
+
+ NS_DECL_AND_IMPL_ZEROING_OPERATOR_NEW
+
+ nsresult Init(nsIDocument* aDoc, nsIURI* aURI, nsISupports* aContainer,
+ nsIChannel* aChannel);
+
+ // nsISupports
+ NS_DECL_ISUPPORTS_INHERITED
+ NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(HTMLContentSink, nsContentSink)
+
+ // nsIContentSink
+ NS_IMETHOD WillParse(void) override;
+ NS_IMETHOD WillBuildModel(nsDTDMode aDTDMode) override;
+ NS_IMETHOD DidBuildModel(bool aTerminated) override;
+ NS_IMETHOD WillInterrupt(void) override;
+ NS_IMETHOD WillResume(void) override;
+ NS_IMETHOD SetParser(nsParserBase* aParser) override;
+ virtual void FlushPendingNotifications(mozFlushType aType) override;
+ NS_IMETHOD SetDocumentCharset(nsACString& aCharset) override;
+ virtual nsISupports *GetTarget() override;
+ virtual bool IsScriptExecuting() override;
+
+ // nsIHTMLContentSink
+ NS_IMETHOD OpenContainer(ElementType aNodeType) override;
+ NS_IMETHOD CloseContainer(ElementType aTag) override;
+
+protected:
+ virtual ~HTMLContentSink();
+
+ nsCOMPtr<nsIHTMLDocument> mHTMLDocument;
+
+ // The maximum length of a text run
+ int32_t mMaxTextRun;
+
+ RefPtr<nsGenericHTMLElement> mRoot;
+ RefPtr<nsGenericHTMLElement> mBody;
+ RefPtr<nsGenericHTMLElement> mHead;
+
+ AutoTArray<SinkContext*, 8> mContextStack;
+ SinkContext* mCurrentContext;
+ SinkContext* mHeadContext;
+
+ // Boolean indicating whether we've seen a <head> tag that might have had
+ // attributes once already.
+ bool mHaveSeenHead;
+
+ // Boolean indicating whether we've notified insertion of our root content
+ // yet. We want to make sure to only do this once.
+ bool mNotifiedRootInsertion;
+
+ nsresult FlushTags() override;
+
+ // Routines for tags that require special handling
+ nsresult CloseHTML();
+ nsresult OpenBody();
+ nsresult CloseBody();
+
+ void CloseHeadContext();
+
+ // nsContentSink overrides
+ void UpdateChildCounts() override;
+
+ void NotifyInsert(nsIContent* aContent,
+ nsIContent* aChildContent,
+ int32_t aIndexInContainer);
+ void NotifyRootInsertion();
+};
+
+class SinkContext
+{
+public:
+ explicit SinkContext(HTMLContentSink* aSink);
+ ~SinkContext();
+
+ nsresult Begin(nsHTMLTag aNodeType, nsGenericHTMLElement* aRoot,
+ uint32_t aNumFlushed, int32_t aInsertionPoint);
+ nsresult OpenBody();
+ nsresult CloseBody();
+ nsresult End();
+
+ nsresult GrowStack();
+ nsresult FlushTags();
+
+ bool IsCurrentContainer(nsHTMLTag mType);
+
+ void DidAddContent(nsIContent* aContent);
+ void UpdateChildCounts();
+
+private:
+ // Function to check whether we've notified for the current content.
+ // What this actually does is check whether we've notified for all
+ // of the parent's kids.
+ bool HaveNotifiedForCurrentContent() const;
+
+public:
+ HTMLContentSink* mSink;
+ int32_t mNotifyLevel;
+
+ struct Node {
+ nsHTMLTag mType;
+ nsGenericHTMLElement* mContent;
+ uint32_t mNumFlushed;
+ int32_t mInsertionPoint;
+
+ nsIContent *Add(nsIContent *child);
+ };
+
+ Node* mStack;
+ int32_t mStackSize;
+ int32_t mStackPos;
+};
+
+nsresult
+NS_NewHTMLElement(Element** aResult, already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo,
+ FromParser aFromParser, const nsAString* aIs)
+{
+ *aResult = nullptr;
+
+ RefPtr<mozilla::dom::NodeInfo> nodeInfo = aNodeInfo;
+
+ nsIParserService* parserService = nsContentUtils::GetParserService();
+ if (!parserService)
+ return NS_ERROR_OUT_OF_MEMORY;
+
+ nsIAtom *name = nodeInfo->NameAtom();
+
+ NS_ASSERTION(nodeInfo->NamespaceEquals(kNameSpaceID_XHTML),
+ "Trying to HTML elements that don't have the XHTML namespace");
+
+ int32_t tag = parserService->HTMLCaseSensitiveAtomTagToId(name);
+
+ // Per the Custom Element specification, unknown tags that are valid custom
+ // element names should be HTMLElement instead of HTMLUnknownElement.
+ bool isCustomElementName = (tag == eHTMLTag_userdefined &&
+ nsContentUtils::IsCustomElementName(name));
+ if (isCustomElementName) {
+ NS_IF_ADDREF(*aResult = NS_NewHTMLElement(nodeInfo.forget(), aFromParser));
+ } else {
+ *aResult = CreateHTMLElement(tag, nodeInfo.forget(), aFromParser).take();
+ }
+
+ if (!*aResult) {
+ return NS_ERROR_OUT_OF_MEMORY;
+ }
+
+ if (isCustomElementName || aIs) {
+ nsContentUtils::SetupCustomElement(*aResult, aIs);
+ }
+
+ return NS_OK;
+}
+
+already_AddRefed<nsGenericHTMLElement>
+CreateHTMLElement(uint32_t aNodeType,
+ already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo,
+ FromParser aFromParser)
+{
+ NS_ASSERTION(aNodeType <= NS_HTML_TAG_MAX ||
+ aNodeType == eHTMLTag_userdefined,
+ "aNodeType is out of bounds");
+
+ contentCreatorCallback cb = sContentCreatorCallbacks[aNodeType];
+
+ NS_ASSERTION(cb != NS_NewHTMLNOTUSEDElement,
+ "Don't know how to construct tag element!");
+
+ RefPtr<nsGenericHTMLElement> result = cb(Move(aNodeInfo), aFromParser);
+
+ return result.forget();
+}
+
+//----------------------------------------------------------------------
+
+SinkContext::SinkContext(HTMLContentSink* aSink)
+ : mSink(aSink),
+ mNotifyLevel(0),
+ mStack(nullptr),
+ mStackSize(0),
+ mStackPos(0)
+{
+ MOZ_COUNT_CTOR(SinkContext);
+}
+
+SinkContext::~SinkContext()
+{
+ MOZ_COUNT_DTOR(SinkContext);
+
+ if (mStack) {
+ for (int32_t i = 0; i < mStackPos; i++) {
+ NS_RELEASE(mStack[i].mContent);
+ }
+ delete [] mStack;
+ }
+}
+
+nsresult
+SinkContext::Begin(nsHTMLTag aNodeType,
+ nsGenericHTMLElement* aRoot,
+ uint32_t aNumFlushed,
+ int32_t aInsertionPoint)
+{
+ if (mStackSize < 1) {
+ nsresult rv = GrowStack();
+ if (NS_FAILED(rv)) {
+ return rv;
+ }
+ }
+
+ mStack[0].mType = aNodeType;
+ mStack[0].mContent = aRoot;
+ mStack[0].mNumFlushed = aNumFlushed;
+ mStack[0].mInsertionPoint = aInsertionPoint;
+ NS_ADDREF(aRoot);
+ mStackPos = 1;
+
+ return NS_OK;
+}
+
+bool
+SinkContext::IsCurrentContainer(nsHTMLTag aTag)
+{
+ if (aTag == mStack[mStackPos - 1].mType) {
+ return true;
+ }
+
+ return false;
+}
+
+void
+SinkContext::DidAddContent(nsIContent* aContent)
+{
+ if ((mStackPos == 2) && (mSink->mBody == mStack[1].mContent)) {
+ // We just finished adding something to the body
+ mNotifyLevel = 0;
+ }
+
+ // If we just added content to a node for which
+ // an insertion happen, we need to do an immediate
+ // notification for that insertion.
+ if (0 < mStackPos &&
+ mStack[mStackPos - 1].mInsertionPoint != -1 &&
+ mStack[mStackPos - 1].mNumFlushed <
+ mStack[mStackPos - 1].mContent->GetChildCount()) {
+ nsIContent* parent = mStack[mStackPos - 1].mContent;
+ int32_t childIndex = mStack[mStackPos - 1].mInsertionPoint - 1;
+ NS_ASSERTION(parent->GetChildAt(childIndex) == aContent,
+ "Flushing the wrong child.");
+ mSink->NotifyInsert(parent, aContent, childIndex);
+ mStack[mStackPos - 1].mNumFlushed = parent->GetChildCount();
+ } else if (mSink->IsTimeToNotify()) {
+ FlushTags();
+ }
+}
+
+nsresult
+SinkContext::OpenBody()
+{
+ if (mStackPos <= 0) {
+ NS_ERROR("container w/o parent");
+
+ return NS_ERROR_FAILURE;
+ }
+
+ nsresult rv;
+ if (mStackPos + 1 > mStackSize) {
+ rv = GrowStack();
+ if (NS_FAILED(rv)) {
+ return rv;
+ }
+ }
+
+ RefPtr<mozilla::dom::NodeInfo> nodeInfo =
+ mSink->mNodeInfoManager->GetNodeInfo(nsGkAtoms::body, nullptr,
+ kNameSpaceID_XHTML,
+ nsIDOMNode::ELEMENT_NODE);
+ NS_ENSURE_TRUE(nodeInfo, NS_ERROR_UNEXPECTED);
+
+ // Make the content object
+ RefPtr<nsGenericHTMLElement> body =
+ NS_NewHTMLBodyElement(nodeInfo.forget(), FROM_PARSER_NETWORK);
+ if (!body) {
+ return NS_ERROR_OUT_OF_MEMORY;
+ }
+
+ mStack[mStackPos].mType = eHTMLTag_body;
+ body.forget(&mStack[mStackPos].mContent);
+ mStack[mStackPos].mNumFlushed = 0;
+ mStack[mStackPos].mInsertionPoint = -1;
+ ++mStackPos;
+ mStack[mStackPos - 2].Add(mStack[mStackPos - 1].mContent);
+
+ return NS_OK;
+}
+
+bool
+SinkContext::HaveNotifiedForCurrentContent() const
+{
+ if (0 < mStackPos) {
+ nsIContent* parent = mStack[mStackPos - 1].mContent;
+ return mStack[mStackPos-1].mNumFlushed == parent->GetChildCount();
+ }
+
+ return true;
+}
+
+nsIContent *
+SinkContext::Node::Add(nsIContent *child)
+{
+ NS_ASSERTION(mContent, "No parent to insert/append into!");
+ if (mInsertionPoint != -1) {
+ NS_ASSERTION(mNumFlushed == mContent->GetChildCount(),
+ "Inserting multiple children without flushing.");
+ mContent->InsertChildAt(child, mInsertionPoint++, false);
+ } else {
+ mContent->AppendChildTo(child, false);
+ }
+ return child;
+}
+
+nsresult
+SinkContext::CloseBody()
+{
+ NS_ASSERTION(mStackPos > 0,
+ "stack out of bounds. wrong context probably!");
+
+ if (mStackPos <= 0) {
+ return NS_OK; // Fix crash - Ref. bug 45975 or 45007
+ }
+
+ --mStackPos;
+ NS_ASSERTION(mStack[mStackPos].mType == eHTMLTag_body,
+ "Tag mismatch. Closing tag on wrong context or something?");
+
+ nsGenericHTMLElement* content = mStack[mStackPos].mContent;
+
+ content->Compact();
+
+ // If we're in a state where we do append notifications as
+ // we go up the tree, and we're at the level where the next
+ // notification needs to be done, do the notification.
+ if (mNotifyLevel >= mStackPos) {
+ // Check to see if new content has been added after our last
+ // notification
+
+ if (mStack[mStackPos].mNumFlushed < content->GetChildCount()) {
+ mSink->NotifyAppend(content, mStack[mStackPos].mNumFlushed);
+ mStack[mStackPos].mNumFlushed = content->GetChildCount();
+ }
+
+ // Indicate that notification has now happened at this level
+ mNotifyLevel = mStackPos - 1;
+ }
+
+ DidAddContent(content);
+ NS_IF_RELEASE(content);
+
+ return NS_OK;
+}
+
+nsresult
+SinkContext::End()
+{
+ for (int32_t i = 0; i < mStackPos; i++) {
+ NS_RELEASE(mStack[i].mContent);
+ }
+
+ mStackPos = 0;
+
+ return NS_OK;
+}
+
+nsresult
+SinkContext::GrowStack()
+{
+ int32_t newSize = mStackSize * 2;
+ if (newSize == 0) {
+ newSize = 32;
+ }
+
+ Node* stack = new Node[newSize];
+
+ if (mStackPos != 0) {
+ memcpy(stack, mStack, sizeof(Node) * mStackPos);
+ delete [] mStack;
+ }
+
+ mStack = stack;
+ mStackSize = newSize;
+
+ return NS_OK;
+}
+
+/**
+ * NOTE!! Forked into nsXMLContentSink. 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
+SinkContext::FlushTags()
+{
+ mSink->mDeferredFlushTags = false;
+ bool oldBeganUpdate = mSink->mBeganUpdate;
+ uint32_t oldUpdates = mSink->mUpdatesInNotification;
+
+ ++(mSink->mInNotification);
+ mSink->mUpdatesInNotification = 0;
+ {
+ // Scope so we call EndUpdate before we decrease mInNotification
+ mozAutoDocUpdate updateBatch(mSink->mDocument, UPDATE_CONTENT_MODEL,
+ true);
+ mSink->mBeganUpdate = true;
+
+ // 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.
+
+ // Note that we can start at stackPos == 0 here, because it's the caller's
+ // responsibility to handle flushing interactions between contexts (see
+ // HTMLContentSink::BeginContext).
+ int32_t stackPos = 0;
+ bool flushed = false;
+ uint32_t childCount;
+ nsGenericHTMLElement* content;
+
+ while (stackPos < mStackPos) {
+ content = mStack[stackPos].mContent;
+ childCount = content->GetChildCount();
+
+ if (!flushed && (mStack[stackPos].mNumFlushed < childCount)) {
+ if (mStack[stackPos].mInsertionPoint != -1) {
+ // We might have popped the child off our stack already
+ // but not notified on it yet, which is why we have to get it
+ // directly from its parent node.
+
+ int32_t childIndex = mStack[stackPos].mInsertionPoint - 1;
+ nsIContent* child = content->GetChildAt(childIndex);
+ // Child not on stack anymore; can't assert it's correct
+ NS_ASSERTION(!(mStackPos > (stackPos + 1)) ||
+ (child == mStack[stackPos + 1].mContent),
+ "Flushing the wrong child.");
+ mSink->NotifyInsert(content, child, childIndex);
+ } else {
+ mSink->NotifyAppend(content, mStack[stackPos].mNumFlushed);
+ }
+
+ flushed = true;
+ }
+
+ mStack[stackPos].mNumFlushed = childCount;
+ stackPos++;
+ }
+ mNotifyLevel = mStackPos - 1;
+ }
+ --(mSink->mInNotification);
+
+ if (mSink->mUpdatesInNotification > 1) {
+ UpdateChildCounts();
+ }
+
+ mSink->mUpdatesInNotification = oldUpdates;
+ mSink->mBeganUpdate = oldBeganUpdate;
+
+ return NS_OK;
+}
+
+/**
+ * NOTE!! Forked into nsXMLContentSink. Please keep in sync.
+ */
+void
+SinkContext::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 stackPos = mStackPos - 1;
+ while (stackPos >= 0) {
+ Node & node = mStack[stackPos];
+ node.mNumFlushed = node.mContent->GetChildCount();
+
+ stackPos--;
+ }
+
+ mNotifyLevel = mStackPos - 1;
+}
+
+nsresult
+NS_NewHTMLContentSink(nsIHTMLContentSink** aResult,
+ nsIDocument* aDoc,
+ nsIURI* aURI,
+ nsISupports* aContainer,
+ nsIChannel* aChannel)
+{
+ NS_ENSURE_ARG_POINTER(aResult);
+
+ RefPtr<HTMLContentSink> it = new HTMLContentSink();
+
+ nsresult rv = it->Init(aDoc, aURI, aContainer, aChannel);
+
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ *aResult = it;
+ NS_ADDREF(*aResult);
+
+ return NS_OK;
+}
+
+HTMLContentSink::HTMLContentSink()
+{
+ // Note: operator new zeros our memory
+}
+
+HTMLContentSink::~HTMLContentSink()
+{
+ if (mNotificationTimer) {
+ mNotificationTimer->Cancel();
+ }
+
+ int32_t numContexts = mContextStack.Length();
+
+ if (mCurrentContext == mHeadContext && numContexts > 0) {
+ // Pop off the second html context if it's not done earlier
+ mContextStack.RemoveElementAt(--numContexts);
+ }
+
+ int32_t i;
+ for (i = 0; i < numContexts; i++) {
+ SinkContext* sc = mContextStack.ElementAt(i);
+ if (sc) {
+ sc->End();
+ if (sc == mCurrentContext) {
+ mCurrentContext = nullptr;
+ }
+
+ delete sc;
+ }
+ }
+
+ if (mCurrentContext == mHeadContext) {
+ mCurrentContext = nullptr;
+ }
+
+ delete mCurrentContext;
+
+ delete mHeadContext;
+}
+
+NS_IMPL_CYCLE_COLLECTION_CLASS(HTMLContentSink)
+
+NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(HTMLContentSink, nsContentSink)
+ NS_IMPL_CYCLE_COLLECTION_UNLINK(mHTMLDocument)
+ NS_IMPL_CYCLE_COLLECTION_UNLINK(mRoot)
+ NS_IMPL_CYCLE_COLLECTION_UNLINK(mBody)
+ NS_IMPL_CYCLE_COLLECTION_UNLINK(mHead)
+NS_IMPL_CYCLE_COLLECTION_UNLINK_END
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(HTMLContentSink,
+ nsContentSink)
+ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mHTMLDocument)
+ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mRoot)
+ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mBody)
+ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mHead)
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
+
+NS_INTERFACE_TABLE_HEAD_CYCLE_COLLECTION_INHERITED(HTMLContentSink)
+ NS_INTERFACE_TABLE_BEGIN
+ NS_INTERFACE_TABLE_ENTRY(HTMLContentSink, nsIContentSink)
+ NS_INTERFACE_TABLE_ENTRY(HTMLContentSink, nsIHTMLContentSink)
+ NS_INTERFACE_TABLE_END
+NS_INTERFACE_TABLE_TAIL_INHERITING(nsContentSink)
+
+NS_IMPL_ADDREF_INHERITED(HTMLContentSink, nsContentSink)
+NS_IMPL_RELEASE_INHERITED(HTMLContentSink, nsContentSink)
+
+nsresult
+HTMLContentSink::Init(nsIDocument* aDoc,
+ nsIURI* aURI,
+ nsISupports* aContainer,
+ nsIChannel* aChannel)
+{
+ NS_ENSURE_TRUE(aContainer, NS_ERROR_NULL_POINTER);
+
+ nsresult rv = nsContentSink::Init(aDoc, aURI, aContainer, aChannel);
+ if (NS_FAILED(rv)) {
+ return rv;
+ }
+
+ aDoc->AddObserver(this);
+ mIsDocumentObserver = true;
+ mHTMLDocument = do_QueryInterface(aDoc);
+
+ NS_ASSERTION(mDocShell, "oops no docshell!");
+
+ // Changed from 8192 to greatly improve page loading performance on
+ // large pages. See bugzilla bug 77540.
+ mMaxTextRun = Preferences::GetInt("content.maxtextrun", 8191);
+
+ RefPtr<mozilla::dom::NodeInfo> nodeInfo;
+ nodeInfo = mNodeInfoManager->GetNodeInfo(nsGkAtoms::html, nullptr,
+ kNameSpaceID_XHTML,
+ nsIDOMNode::ELEMENT_NODE);
+
+ // Make root part
+ mRoot = NS_NewHTMLHtmlElement(nodeInfo.forget());
+ if (!mRoot) {
+ return NS_ERROR_OUT_OF_MEMORY;
+ }
+
+ NS_ASSERTION(mDocument->GetChildCount() == 0,
+ "Document should have no kids here!");
+ rv = mDocument->AppendChildTo(mRoot, false);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ // Make head part
+ nodeInfo = mNodeInfoManager->GetNodeInfo(nsGkAtoms::head,
+ nullptr, kNameSpaceID_XHTML,
+ nsIDOMNode::ELEMENT_NODE);
+
+ mHead = NS_NewHTMLHeadElement(nodeInfo.forget());
+ if (NS_FAILED(rv)) {
+ return NS_ERROR_OUT_OF_MEMORY;
+ }
+
+ mRoot->AppendChildTo(mHead, false);
+
+ mCurrentContext = new SinkContext(this);
+ mCurrentContext->Begin(eHTMLTag_html, mRoot, 0, -1);
+ mContextStack.AppendElement(mCurrentContext);
+
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+HTMLContentSink::WillParse(void)
+{
+ return WillParseImpl();
+}
+
+NS_IMETHODIMP
+HTMLContentSink::WillBuildModel(nsDTDMode aDTDMode)
+{
+ WillBuildModelImpl();
+
+ if (mHTMLDocument) {
+ nsCompatibility mode = eCompatibility_NavQuirks;
+ switch (aDTDMode) {
+ case eDTDMode_full_standards:
+ mode = eCompatibility_FullStandards;
+ break;
+ case eDTDMode_almost_standards:
+ mode = eCompatibility_AlmostStandards;
+ break;
+ default:
+ break;
+ }
+ mHTMLDocument->SetCompatibilityMode(mode);
+ }
+
+ // Notify document that the load is beginning
+ mDocument->BeginLoad();
+
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+HTMLContentSink::DidBuildModel(bool aTerminated)
+{
+ DidBuildModelImpl(aTerminated);
+
+ // Reflow the last batch of content
+ if (mBody) {
+ mCurrentContext->FlushTags();
+ } else if (!mLayoutStarted) {
+ // We never saw the body, and layout never got started. Force
+ // layout *now*, to get an initial reflow.
+ // NOTE: only force the layout if we are NOT destroying the
+ // docshell. If we are destroying it, then starting layout will
+ // likely cause us to crash, or at best waste a lot of time as we
+ // are just going to tear it down anyway.
+ bool bDestroying = true;
+ if (mDocShell) {
+ mDocShell->IsBeingDestroyed(&bDestroying);
+ }
+
+ if (!bDestroying) {
+ StartLayout(false);
+ }
+ }
+
+ ScrollToRef();
+
+ // Make sure we no longer respond to document mutations. We've flushed all
+ // our notifications out, so there's no need to do anything else here.
+
+ // XXXbz I wonder whether we could End() our contexts here too, or something,
+ // just to make sure we no longer notify... Or is the mIsDocumentObserver
+ // thing sufficient?
+ mDocument->RemoveObserver(this);
+ mIsDocumentObserver = false;
+
+ mDocument->EndLoad();
+
+ DropParserAndPerfHint();
+
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+HTMLContentSink::SetParser(nsParserBase* aParser)
+{
+ NS_PRECONDITION(aParser, "Should have a parser here!");
+ mParser = aParser;
+ return NS_OK;
+}
+
+nsresult
+HTMLContentSink::CloseHTML()
+{
+ if (mHeadContext) {
+ if (mCurrentContext == mHeadContext) {
+ uint32_t numContexts = mContextStack.Length();
+
+ // Pop off the second html context if it's not done earlier
+ mCurrentContext = mContextStack.ElementAt(--numContexts);
+ mContextStack.RemoveElementAt(numContexts);
+ }
+
+ mHeadContext->End();
+
+ delete mHeadContext;
+ mHeadContext = nullptr;
+ }
+
+ return NS_OK;
+}
+
+nsresult
+HTMLContentSink::OpenBody()
+{
+ CloseHeadContext(); // do this just in case if the HEAD was left open!
+
+ // if we already have a body we're done
+ if (mBody) {
+ return NS_OK;
+ }
+
+ nsresult rv = mCurrentContext->OpenBody();
+
+ if (NS_FAILED(rv)) {
+ return rv;
+ }
+
+ mBody = mCurrentContext->mStack[mCurrentContext->mStackPos - 1].mContent;
+
+ if (mCurrentContext->mStackPos > 1) {
+ int32_t parentIndex = mCurrentContext->mStackPos - 2;
+ nsGenericHTMLElement *parent = mCurrentContext->mStack[parentIndex].mContent;
+ int32_t numFlushed = mCurrentContext->mStack[parentIndex].mNumFlushed;
+ int32_t childCount = parent->GetChildCount();
+ NS_ASSERTION(numFlushed < childCount, "Already notified on the body?");
+
+ int32_t insertionPoint =
+ mCurrentContext->mStack[parentIndex].mInsertionPoint;
+
+ // XXX: I have yet to see a case where numFlushed is non-zero and
+ // insertionPoint is not -1, but this code will try to handle
+ // those cases too.
+
+ uint32_t oldUpdates = mUpdatesInNotification;
+ mUpdatesInNotification = 0;
+ if (insertionPoint != -1) {
+ NotifyInsert(parent, mBody, insertionPoint - 1);
+ } else {
+ NotifyAppend(parent, numFlushed);
+ }
+ mCurrentContext->mStack[parentIndex].mNumFlushed = childCount;
+ if (mUpdatesInNotification > 1) {
+ UpdateChildCounts();
+ }
+ mUpdatesInNotification = oldUpdates;
+ }
+
+ StartLayout(false);
+
+ return NS_OK;
+}
+
+nsresult
+HTMLContentSink::CloseBody()
+{
+ // Flush out anything that's left
+ mCurrentContext->FlushTags();
+ mCurrentContext->CloseBody();
+
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+HTMLContentSink::OpenContainer(ElementType aElementType)
+{
+ nsresult rv = NS_OK;
+
+ switch (aElementType) {
+ case eBody:
+ rv = OpenBody();
+ break;
+ case eHTML:
+ if (mRoot) {
+ // If we've already hit this code once, then we're done
+ if (!mNotifiedRootInsertion) {
+ NotifyRootInsertion();
+ }
+ ProcessOfflineManifest(mRoot);
+ }
+ break;
+ }
+
+ return rv;
+}
+
+NS_IMETHODIMP
+HTMLContentSink::CloseContainer(const ElementType aTag)
+{
+ nsresult rv = NS_OK;
+
+ switch (aTag) {
+ case eBody:
+ rv = CloseBody();
+ break;
+ case eHTML:
+ rv = CloseHTML();
+ break;
+ }
+
+ return rv;
+}
+
+NS_IMETHODIMP
+HTMLContentSink::WillInterrupt()
+{
+ return WillInterruptImpl();
+}
+
+NS_IMETHODIMP
+HTMLContentSink::WillResume()
+{
+ return WillResumeImpl();
+}
+
+void
+HTMLContentSink::CloseHeadContext()
+{
+ if (mCurrentContext) {
+ if (!mCurrentContext->IsCurrentContainer(eHTMLTag_head))
+ return;
+
+ mCurrentContext->FlushTags();
+ }
+
+ if (!mContextStack.IsEmpty())
+ {
+ uint32_t n = mContextStack.Length() - 1;
+ mCurrentContext = mContextStack.ElementAt(n);
+ mContextStack.RemoveElementAt(n);
+ }
+}
+
+void
+HTMLContentSink::NotifyInsert(nsIContent* aContent,
+ nsIContent* aChildContent,
+ int32_t aIndexInContainer)
+{
+ if (aContent && aContent->GetUncomposedDoc() != mDocument) {
+ // aContent is not actually in our document anymore.... Just bail out of
+ // here; notifying on our document for this insert would be wrong.
+ return;
+ }
+
+ mInNotification++;
+
+ {
+ // Scope so we call EndUpdate before we decrease mInNotification
+ MOZ_AUTO_DOC_UPDATE(mDocument, UPDATE_CONTENT_MODEL, !mBeganUpdate);
+ nsNodeUtils::ContentInserted(NODE_FROM(aContent, mDocument),
+ aChildContent, aIndexInContainer);
+ mLastNotificationTime = PR_Now();
+ }
+
+ mInNotification--;
+}
+
+void
+HTMLContentSink::NotifyRootInsertion()
+{
+ NS_PRECONDITION(!mNotifiedRootInsertion, "Double-notifying on root?");
+ NS_ASSERTION(!mLayoutStarted,
+ "How did we start layout without notifying on root?");
+ // Now make sure to notify that we have now inserted our root. If
+ // there has been no initial reflow yet it'll be a no-op, but if
+ // there has been one we need this to get its frames constructed.
+ // Note that if mNotifiedRootInsertion is true we don't notify here,
+ // since that just means there are multiple <html> tags in the
+ // document; in those cases we just want to put all the attrs on one
+ // tag.
+ mNotifiedRootInsertion = true;
+ int32_t index = mDocument->IndexOf(mRoot);
+ NS_ASSERTION(index != -1, "mRoot not child of document?");
+ NotifyInsert(nullptr, mRoot, index);
+
+ // Now update the notification information in all our
+ // contexts, since we just inserted the root and notified on
+ // our whole tree
+ UpdateChildCounts();
+}
+
+void
+HTMLContentSink::UpdateChildCounts()
+{
+ uint32_t numContexts = mContextStack.Length();
+ for (uint32_t i = 0; i < numContexts; i++) {
+ SinkContext* sc = mContextStack.ElementAt(i);
+
+ sc->UpdateChildCounts();
+ }
+
+ mCurrentContext->UpdateChildCounts();
+}
+
+void
+HTMLContentSink::FlushPendingNotifications(mozFlushType aType)
+{
+ // Only flush tags if we're not doing the notification ourselves
+ // (since we aren't reentrant)
+ if (!mInNotification) {
+ // Only flush if we're still a document observer (so that our child counts
+ // should be correct).
+ if (mIsDocumentObserver) {
+ if (aType >= Flush_ContentAndNotify) {
+ FlushTags();
+ }
+ }
+ if (aType >= Flush_InterruptibleLayout) {
+ // Make sure that layout has started so that the reflow flush
+ // will actually happen.
+ StartLayout(true);
+ }
+ }
+}
+
+nsresult
+HTMLContentSink::FlushTags()
+{
+ if (!mNotifiedRootInsertion) {
+ NotifyRootInsertion();
+ return NS_OK;
+ }
+
+ return mCurrentContext ? mCurrentContext->FlushTags() : NS_OK;
+}
+
+NS_IMETHODIMP
+HTMLContentSink::SetDocumentCharset(nsACString& aCharset)
+{
+ MOZ_ASSERT_UNREACHABLE("<meta charset> case doesn't occur with about:blank");
+ return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+nsISupports *
+HTMLContentSink::GetTarget()
+{
+ return mDocument;
+}
+
+bool
+HTMLContentSink::IsScriptExecuting()
+{
+ return IsScriptExecutingImpl();
+}