зеркало из https://github.com/mozilla/gecko-dev.git
138 строки
4.6 KiB
C++
138 строки
4.6 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsHtml5StringParser.h"
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#include "nsHtml5TreeOpExecutor.h"
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#include "nsHtml5TreeBuilder.h"
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#include "nsHtml5Tokenizer.h"
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#include "nsIContent.h"
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#include "nsIDocument.h"
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#include "nsIDOMDocumentFragment.h"
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#include "nsHtml5DependentUTF16Buffer.h"
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NS_IMPL_ISUPPORTS0(nsHtml5StringParser)
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nsHtml5StringParser::nsHtml5StringParser()
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: mExecutor(new nsHtml5TreeOpExecutor(true))
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, mTreeBuilder(new nsHtml5TreeBuilder(mExecutor, nullptr))
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, mTokenizer(new nsHtml5Tokenizer(mTreeBuilder, false))
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{
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MOZ_COUNT_CTOR(nsHtml5StringParser);
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mAtomTable.Init();
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mTokenizer->setInterner(&mAtomTable);
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}
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nsHtml5StringParser::~nsHtml5StringParser()
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{
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MOZ_COUNT_DTOR(nsHtml5StringParser);
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}
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nsresult
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nsHtml5StringParser::ParseFragment(const nsAString& aSourceBuffer,
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nsIContent* aTargetNode,
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nsIAtom* aContextLocalName,
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int32_t aContextNamespace,
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bool aQuirks,
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bool aPreventScriptExecution)
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{
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NS_ENSURE_TRUE(aSourceBuffer.Length() <= INT32_MAX,
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NS_ERROR_OUT_OF_MEMORY);
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nsIDocument* doc = aTargetNode->OwnerDoc();
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nsIURI* uri = doc->GetDocumentURI();
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NS_ENSURE_TRUE(uri, NS_ERROR_NOT_AVAILABLE);
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nsIContent* target = aTargetNode;
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mTreeBuilder->setFragmentContext(aContextLocalName,
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aContextNamespace,
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&target,
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aQuirks);
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#ifdef DEBUG
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if (!aPreventScriptExecution) {
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NS_ASSERTION(!aTargetNode->IsInDoc(),
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"If script execution isn't prevented, "
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"the target node must not be in doc.");
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nsCOMPtr<nsIDOMDocumentFragment> domFrag = do_QueryInterface(aTargetNode);
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NS_ASSERTION(domFrag,
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"If script execution isn't prevented, must parse to DOM fragment.");
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}
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#endif
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mTreeBuilder->SetPreventScriptExecution(aPreventScriptExecution);
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Tokenize(aSourceBuffer, doc, true);
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return NS_OK;
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}
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nsresult
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nsHtml5StringParser::ParseDocument(const nsAString& aSourceBuffer,
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nsIDocument* aTargetDoc,
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bool aScriptingEnabledForNoscriptParsing)
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{
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MOZ_ASSERT(!aTargetDoc->GetFirstChild());
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NS_ENSURE_TRUE(aSourceBuffer.Length() <= INT32_MAX,
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NS_ERROR_OUT_OF_MEMORY);
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mTreeBuilder->setFragmentContext(nullptr,
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kNameSpaceID_None,
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nullptr,
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false);
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mTreeBuilder->SetPreventScriptExecution(true);
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Tokenize(aSourceBuffer, aTargetDoc, aScriptingEnabledForNoscriptParsing);
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return NS_OK;
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}
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void
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nsHtml5StringParser::Tokenize(const nsAString& aSourceBuffer,
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nsIDocument* aDocument,
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bool aScriptingEnabledForNoscriptParsing) {
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nsIURI* uri = aDocument->GetDocumentURI();
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mExecutor->Init(aDocument, uri, nullptr, nullptr);
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mExecutor->SetParser(this);
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mExecutor->SetNodeInfoManager(aDocument->NodeInfoManager());
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NS_PRECONDITION(!mExecutor->HasStarted(),
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"Tried to start parse without initializing the parser.");
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mTreeBuilder->setScriptingEnabled(aScriptingEnabledForNoscriptParsing);
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mTreeBuilder->setIsSrcdocDocument(aDocument->IsSrcdocDocument());
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mTokenizer->start();
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mExecutor->Start(); // Don't call WillBuildModel in fragment case
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if (!aSourceBuffer.IsEmpty()) {
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bool lastWasCR = false;
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nsHtml5DependentUTF16Buffer buffer(aSourceBuffer);
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while (buffer.hasMore()) {
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buffer.adjust(lastWasCR);
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lastWasCR = false;
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if (buffer.hasMore()) {
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lastWasCR = mTokenizer->tokenizeBuffer(&buffer);
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if (mTreeBuilder->HasScript()) {
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// If we come here, we are in createContextualFragment() or in the
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// upcoming document.parse(). It's unclear if it's really necessary
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// to flush here, but let's do so for consistency with other flushes
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// to avoid different code paths on the executor side.
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mTreeBuilder->Flush(); // Move ops to the executor
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mExecutor->FlushDocumentWrite(); // run the ops
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}
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}
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}
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}
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mTokenizer->eof();
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mTreeBuilder->StreamEnded();
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mTreeBuilder->Flush();
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mExecutor->FlushDocumentWrite();
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mTokenizer->end();
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mExecutor->DropParserAndPerfHint();
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mExecutor->DropHeldElements();
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mTreeBuilder->DropHandles();
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mAtomTable.Clear();
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mExecutor->Reset();
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}
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