1 files changed, 343 insertions, 0 deletions
diff --git a/parser/html/nsHtml5Parser.h b/parser/html/nsHtml5Parser.h
new file mode 100644
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+++ b/parser/html/nsHtml5Parser.h
@@ -0,0 +1,343 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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/. */
+
+#ifndef NS_HTML5_PARSER
+#define NS_HTML5_PARSER
+
+#include "mozilla/UniquePtr.h"
+#include "nsIParser.h"
+#include "nsDeque.h"
+#include "nsIContentSink.h"
+#include "nsIRequest.h"
+#include "nsIChannel.h"
+#include "nsCOMArray.h"
+#include "nsContentSink.h"
+#include "nsCycleCollectionParticipant.h"
+#include "nsHtml5OwningUTF16Buffer.h"
+#include "nsHtml5TreeOpExecutor.h"
+#include "nsHtml5StreamParser.h"
+#include "nsHtml5AtomTable.h"
+#include "nsWeakReference.h"
+#include "nsHtml5StreamListener.h"
+#include "nsCharsetSource.h"
+
+class nsHtml5Parser final : public nsIParser, public nsSupportsWeakReference {
+ public:
+  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+
+  NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(nsHtml5Parser, nsIParser)
+
+  nsHtml5Parser();
+
+  /* Start nsIParser */
+  /**
+   * No-op for backwards compat.
+   */
+  NS_IMETHOD_(void) SetContentSink(nsIContentSink* aSink) override;
+
+  /**
+   * Returns the tree op executor for backwards compat.
+   */
+  NS_IMETHOD_(nsIContentSink*) GetContentSink() override;
+
+  /**
+   * Always returns "view" for backwards compat.
+   */
+  NS_IMETHOD_(void) GetCommand(nsCString& aCommand) override;
+
+  /**
+   * No-op for backwards compat.
+   */
+  NS_IMETHOD_(void) SetCommand(const char* aCommand) override;
+
+  /**
+   * No-op for backwards compat.
+   */
+  NS_IMETHOD_(void) SetCommand(eParserCommands aParserCommand) override;
+
+  /**
+   *  Call this method once you've created a parser, and want to instruct it
+   *  about what charset to load
+   *
+   *  @param   aEncoding the charset of a document
+   *  @param   aCharsetSource the source of the charset
+   */
+  virtual void SetDocumentCharset(NotNull<const Encoding*> aEncoding,
+                                  int32_t aSource,
+                                  bool aForceAutoDetection) override;
+
+  /**
+   * Get the channel associated with this parser
+   * @param aChannel out param that will contain the result
+   * @return NS_OK if successful or NS_NOT_AVAILABLE if not
+   */
+  nsresult GetChannel(nsIChannel** aChannel);
+
+  /**
+   * Get the stream parser for this parser
+   */
+  virtual nsIStreamListener* GetStreamListener() override;
+
+  /**
+   * Don't call. For interface compat only.
+   */
+  NS_IMETHOD ContinueInterruptedParsing() override;
+
+  /**
+   * Blocks the parser.
+   */
+  NS_IMETHOD_(void) BlockParser() override;
+
+  /**
+   * Unblocks the parser.
+   */
+  NS_IMETHOD_(void) UnblockParser() override;
+
+  /**
+   * Asynchronously continues parsing.
+   */
+  NS_IMETHOD_(void) ContinueInterruptedParsingAsync() override;
+
+  /**
+   * Query whether the parser is enabled (i.e. not blocked) or not.
+   */
+  NS_IMETHOD_(bool) IsParserEnabled() override;
+
+  /**
+   * Query whether the parser is closed (i.e. document.closed() is called) or
+   * not.
+   */
+  NS_IMETHOD_(bool) IsParserClosed() override;
+
+  /**
+   * Query whether the parser thinks it's done with parsing.
+   */
+  NS_IMETHOD_(bool) IsComplete() override;
+
+  /**
+   * Set up request observer.
+   *
+   * @param   aURL used for View Source title
+   */
+  NS_IMETHOD Parse(nsIURI* aURL) override;
+
+  /**
+   * document.write and document.close
+   *
+   * @param   aSourceBuffer the argument of document.write (empty for .close())
+   * @param   aKey a key unique to the script element that caused this call
+   * @param   aLastCall true if .close() false if .write()
+   */
+  nsresult Parse(const nsAString& aSourceBuffer, void* aKey, bool aLastCall);
+
+  /**
+   * Stops the parser prematurely
+   */
+  NS_IMETHOD Terminate() override;
+
+  /**
+   * True if the insertion point (per HTML5) is defined.
+   */
+  virtual bool IsInsertionPointDefined() override;
+
+  /**
+   * Call immediately before starting to evaluate a parser-inserted script or
+   * in general when the spec says to increment the script nesting level.
+   */
+  void IncrementScriptNestingLevel() final;
+
+  /**
+   * Call immediately after having evaluated a parser-inserted script or
+   * generally want to restore to the state before the last
+   * IncrementScriptNestingLevel call.
+   */
+  void DecrementScriptNestingLevel() final;
+
+  /**
+   * True if this is an HTML5 parser whose script nesting level (in
+   * the sense of
+   * <https://html.spec.whatwg.org/multipage/parsing.html#script-nesting-level>)
+   * is nonzero.
+   */
+  bool HasNonzeroScriptNestingLevel() const final;
+
+  /**
+   * Marks the HTML5 parser as not a script-created parser: Prepares the
+   * parser to be able to read a stream.
+   *
+   * @param aCommand the parser command (Yeah, this is bad API design. Let's
+   * make this better when retiring nsIParser)
+   */
+  void MarkAsNotScriptCreated(const char* aCommand);
+
+  /**
+   * True if this is a script-created HTML5 parser.
+   */
+  virtual bool IsScriptCreated() override;
+
+  /* End nsIParser  */
+
+  // Not from an external interface
+  // Non-inherited methods
+
+ public:
+  /**
+   * Initializes the parser to load from a channel.
+   */
+  virtual nsresult Initialize(mozilla::dom::Document* aDoc, nsIURI* aURI,
+                              nsISupports* aContainer, nsIChannel* aChannel);
+
+  inline nsHtml5Tokenizer* GetTokenizer() { return mTokenizer.get(); }
+
+  void InitializeDocWriteParserState(nsAHtml5TreeBuilderState* aState,
+                                     int32_t aLine);
+
+  void DropStreamParser() {
+    if (GetStreamParser()) {
+      GetStreamParser()->DropTimer();
+      mStreamListener->DropDelegate();
+      mStreamListener = nullptr;
+    }
+  }
+
+  void StartTokenizer(bool aScriptingEnabled);
+
+  void ContinueAfterFailedCharsetSwitch();
+
+  nsHtml5StreamParser* GetStreamParser() {
+    if (!mStreamListener) {
+      return nullptr;
+    }
+    return mStreamListener->GetDelegate();
+  }
+
+  void PermanentlyUndefineInsertionPoint() {
+    mInsertionPointPermanentlyUndefined = true;
+  }
+
+  /**
+   * Parse until pending data is exhausted or a script blocks the parser
+   */
+  nsresult ParseUntilBlocked();
+
+  /**
+   * Start our executor.  This is meant to be used from document.open() _only_
+   * and does some work similar to what nsHtml5StreamParser::OnStartRequest does
+   * for normal parses.
+   */
+  nsresult StartExecutor();
+
+ private:
+  virtual ~nsHtml5Parser();
+
+  // State variables
+
+  /**
+   * Whether the last character tokenized was a carriage return (for CRLF)
+   */
+  bool mLastWasCR;
+
+  /**
+   * Whether the last character tokenized was a carriage return (for CRLF)
+   * when preparsing document.write.
+   */
+  bool mDocWriteSpeculativeLastWasCR;
+
+  /**
+   * The parser is blocking on the load of an external script from a web
+   * page, or any number of extension content scripts.
+   */
+  uint32_t mBlocked;
+
+  /**
+   * Whether the document.write() speculator is already active.
+   */
+  bool mDocWriteSpeculatorActive;
+
+  /**
+   * The number of IncrementScriptNestingLevel calls we've seen without a
+   * matching DecrementScriptNestingLevel.
+   */
+  int32_t mScriptNestingLevel;
+
+  /**
+   * True if document.close() has been called.
+   */
+  bool mDocumentClosed;
+
+  bool mInDocumentWrite;
+
+  /**
+   * This is set when the tokenizer has seen EOF. The purpose is to
+   * keep the insertion point undefined between the time the
+   * parser has reached the point where it can't accept more input
+   * and the time the document's mParser is set to nullptr.
+   * Scripts can run during this time period due to an update
+   * batch ending and due to various end-of-parse events firing.
+   * (Setting mParser on the document to nullptr at the point
+   * where this flag gets set to true would break things that for
+   * legacy reasons assume that mParser on the document stays
+   * non-null though the end-of-parse events.)
+   */
+  bool mInsertionPointPermanentlyUndefined;
+
+  // Portable parser objects
+  /**
+   * The first buffer in the pending UTF-16 buffer queue
+   */
+  RefPtr<nsHtml5OwningUTF16Buffer> mFirstBuffer;
+
+  /**
+   * The last buffer in the pending UTF-16 buffer queue. Always points
+   * to a sentinel object with nullptr as its parser key.
+   */
+  nsHtml5OwningUTF16Buffer* mLastBuffer;  // weak ref;
+
+  /**
+   * The tree operation executor
+   */
+  RefPtr<nsHtml5TreeOpExecutor> mExecutor;
+
+  /**
+   * The HTML5 tree builder
+   */
+  const mozilla::UniquePtr<nsHtml5TreeBuilder> mTreeBuilder;
+
+  /**
+   * The HTML5 tokenizer
+   */
+  const mozilla::UniquePtr<nsHtml5Tokenizer> mTokenizer;
+
+  /**
+   * Another HTML5 tree builder for preloading document.written content.
+   */
+  mozilla::UniquePtr<nsHtml5TreeBuilder> mDocWriteSpeculativeTreeBuilder;
+
+  /**
+   * Another HTML5 tokenizer for preloading document.written content.
+   */
+  mozilla::UniquePtr<nsHtml5Tokenizer> mDocWriteSpeculativeTokenizer;
+
+  /**
+   * The stream listener holding the stream parser.
+   */
+  RefPtr<nsHtml5StreamListener> mStreamListener;
+
+  /**
+   *
+   */
+  int32_t mRootContextLineNumber;
+
+  /**
+   * Whether it's OK to transfer parsing back to the stream parser
+   */
+  bool mReturnToStreamParserPermitted;
+
+  /**
+   * The scoped atom table
+   */
+  nsHtml5AtomTable mAtomTable;
+};
+#endif