/* 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 "nsHtml5StringParser.h"

#include "nsHtml5DependentUTF16Buffer.h"

#include "nsHtml5Tokenizer.h"

#include "nsHtml5TreeBuilder.h"

#include "nsHtml5TreeOpExecutor.h"

#include "nsIContent.h"

#include "nsIDocument.h"

#include "mozilla/dom/DocumentFragment.h"

NS_IMPL_ISUPPORTS0(nsHtml5StringParser)

nsHtml5StringParser::nsHtml5StringParser()

  : mBuilder(new nsHtml5OplessBuilder())

  , mTreeBuilder(new nsHtml5TreeBuilder(mBuilder))

  , mTokenizer(new nsHtml5Tokenizer(mTreeBuilder, false))

{

  mTokenizer->setInterner(&mAtomTable);

}

nsHtml5StringParser::~nsHtml5StringParser() {}

nsresult

nsHtml5StringParser::ParseFragment(const nsAString& aSourceBuffer,

                                   nsIContent* aTargetNode,

                                   nsAtom* aContextLocalName,

                                   int32_t aContextNamespace,

                                   bool aQuirks,

                                   bool aPreventScriptExecution)

{

  NS_ENSURE_TRUE(aSourceBuffer.Length() <= INT32_MAX, NS_ERROR_OUT_OF_MEMORY);

  nsIDocument* doc = aTargetNode->OwnerDoc();

  nsIURI* uri = doc->GetDocumentURI();

  NS_ENSURE_TRUE(uri, NS_ERROR_NOT_AVAILABLE);

  mTreeBuilder->setFragmentContext(

    aContextLocalName, aContextNamespace, aTargetNode, aQuirks);

#ifdef DEBUG

  if (!aPreventScriptExecution) {

    NS_ASSERTION(!aTargetNode->IsInUncomposedDoc(),

                 "If script execution isn't prevented, "

                 "the target node must not be in doc.");

    NS_ASSERTION(

      aTargetNode->NodeType() == nsINode::DOCUMENT_FRAGMENT_NODE,

      "If script execution isn't prevented, must parse to DOM fragment.");

  }

#endif

  mTreeBuilder->SetPreventScriptExecution(aPreventScriptExecution);

  return Tokenize(aSourceBuffer, doc, true);

}

nsresult

nsHtml5StringParser::ParseDocument(const nsAString& aSourceBuffer,

                                   nsIDocument* aTargetDoc,

                                   bool aScriptingEnabledForNoscriptParsing)

{

  MOZ_ASSERT(!aTargetDoc->GetFirstChild());

  NS_ENSURE_TRUE(aSourceBuffer.Length() <= INT32_MAX, NS_ERROR_OUT_OF_MEMORY);

  mTreeBuilder->setFragmentContext(nullptr, kNameSpaceID_None, nullptr, false);

  mTreeBuilder->SetPreventScriptExecution(true);

  return Tokenize(

    aSourceBuffer, aTargetDoc, aScriptingEnabledForNoscriptParsing);

}

nsresult

nsHtml5StringParser::Tokenize(const nsAString& aSourceBuffer,

                              nsIDocument* aDocument,

                              bool aScriptingEnabledForNoscriptParsing)

{

  nsIURI* uri = aDocument->GetDocumentURI();

  mBuilder->Init(aDocument, uri, nullptr, nullptr);

  mBuilder->SetParser(this);

  mBuilder->SetNodeInfoManager(aDocument->NodeInfoManager());

  // Mark the parser as *not* broken by passing NS_OK

  nsresult rv = mBuilder->MarkAsBroken(NS_OK);

  mTreeBuilder->setScriptingEnabled(aScriptingEnabledForNoscriptParsing);

  mTreeBuilder->setIsSrcdocDocument(aDocument->IsSrcdocDocument());

  mBuilder->Start();

  mTokenizer->start();

  if (!aSourceBuffer.IsEmpty()) {

    bool lastWasCR = false;

    nsHtml5DependentUTF16Buffer buffer(aSourceBuffer);

    while (buffer.hasMore()) {

      buffer.adjust(lastWasCR);

      lastWasCR = false;

      if (buffer.hasMore()) {

        if (!mTokenizer->EnsureBufferSpace(buffer.getLength())) {

          rv = mBuilder->MarkAsBroken(NS_ERROR_OUT_OF_MEMORY);

          break;

        }

        lastWasCR = mTokenizer->tokenizeBuffer(&buffer);

        if (NS_FAILED(rv = mBuilder->IsBroken())) {

          break;

        }

      }

    }

  }

  if (NS_SUCCEEDED(rv)) {

    mTokenizer->eof();

  }

  mTokenizer->end();

  mBuilder->Finish();

  mAtomTable.Clear();

  return rv;

}