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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 sw=2 et tw=78: */
/* 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 */
#ifndef nsHtml5DocumentBuilder_h
#define nsHtml5DocumentBuilder_h
#include "mozilla/dom/Document.h"
#include "nsContentSink.h"
#include "nsHtml5DocumentMode.h"
#include "nsIContent.h"
namespace mozilla::dom {
class Document;
typedef nsIContent* nsIContentPtr;
enum eHtml5FlushState {
eNotFlushing = 0, // not flushing
eInFlush = 1, // the Flush() method is on the call stack
eInDocUpdate = 2, // inside an update batch on the document
class nsHtml5DocumentBuilder : public nsContentSink {
using Encoding = mozilla::Encoding;
template <typename T>
using NotNull = mozilla::NotNull<T>;
inline void HoldElement(already_AddRefed<nsIContent> aContent) {
*(mOwnedElements.AppendElement()) = aContent;
nsresult Init(Document* aDoc, nsIURI* aURI, nsISupports* aContainer,
nsIChannel* aChannel);
// Getters and setters for fields from nsContentSink
Document* GetDocument() { return mDocument; }
nsNodeInfoManager* GetNodeInfoManager() { return mNodeInfoManager; }
* Marks this parser as broken and tells the stream parser (if any) to
* terminate.
* @return aReason for convenience
virtual nsresult MarkAsBroken(nsresult aReason);
* Checks if this parser is broken. Returns a non-NS_OK (i.e. non-0)
* value if broken.
inline nsresult IsBroken() { return mBroken; }
inline bool IsComplete() { return !mParser; }
inline void BeginDocUpdate() {
MOZ_RELEASE_ASSERT(IsInFlush(), "Tried to double-open doc update.");
MOZ_RELEASE_ASSERT(mParser, "Started doc update without parser.");
mFlushState = eInDocUpdate;
inline void EndDocUpdate() {
"Tried to end doc update without one open.");
mFlushState = eInFlush;
inline void BeginFlush() {
MOZ_RELEASE_ASSERT(mFlushState == eNotFlushing,
"Tried to start a flush when already flushing.");
MOZ_RELEASE_ASSERT(mParser, "Started a flush without parser.");
mFlushState = eInFlush;
inline void EndFlush() {
MOZ_RELEASE_ASSERT(IsInFlush(), "Tried to end flush when not flushing.");
mFlushState = eNotFlushing;
inline bool IsInDocUpdate() { return mFlushState == eInDocUpdate; }
inline bool IsInFlush() { return mFlushState == eInFlush; }
* Sets up style sheet load / parse
void UpdateStyleSheet(nsIContent* aElement);
void SetDocumentMode(nsHtml5DocumentMode m);
void SetNodeInfoManager(nsNodeInfoManager* aManager) {
mNodeInfoManager = aManager;
// nsContentSink methods
virtual void UpdateChildCounts() override;
virtual nsresult FlushTags() override;
explicit nsHtml5DocumentBuilder(bool aRunsToCompletion);
virtual ~nsHtml5DocumentBuilder();
AutoTArray<nsCOMPtr<nsIContent>, 32> mOwnedElements;
* Non-NS_OK if this parser should refuse to process any more input.
* For example, the parser needs to be marked as broken if it drops some
* input due to a memory allocation failure. In such a case, the whole
* parser needs to be marked as broken, because some input has been lost
* and parsing more input could lead to a DOM where pieces of HTML source
* that weren't supposed to become scripts become scripts.
nsresult mBroken;
eHtml5FlushState mFlushState;
#endif // nsHtml5DocumentBuilder_h