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/* 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 "nsHtml5TreeOpExecutor.h"
#include "nsHtml5TreeBuilder.h"
#include "nsHtml5Tokenizer.h"
#include "nsIContent.h"
#include "nsIDocument.h"
#include "nsIDOMDocumentFragment.h"
#include "nsHtml5DependentUTF16Buffer.h"
NS_IMPL_ISUPPORTS0(nsHtml5StringParser)
nsHtml5StringParser::nsHtml5StringParser()
: mExecutor(new nsHtml5TreeOpExecutor(true))
, mTreeBuilder(new nsHtml5TreeBuilder(mExecutor, nullptr))
, mTokenizer(new nsHtml5Tokenizer(mTreeBuilder, false))
{
MOZ_COUNT_CTOR(nsHtml5StringParser);
mAtomTable.Init();
mTokenizer->setInterner(&mAtomTable);
}
nsHtml5StringParser::~nsHtml5StringParser()
{
MOZ_COUNT_DTOR(nsHtml5StringParser);
}
nsresult
nsHtml5StringParser::ParseFragment(const nsAString& aSourceBuffer,
nsIContent* aTargetNode,
nsIAtom* 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);
nsIContent* target = aTargetNode;
mTreeBuilder->setFragmentContext(aContextLocalName,
aContextNamespace,
&target,
aQuirks);
#ifdef DEBUG
if (!aPreventScriptExecution) {
NS_ASSERTION(!aTargetNode->IsInDoc(),
"If script execution isn't prevented, "
"the target node must not be in doc.");
nsCOMPtr<nsIDOMDocumentFragment> domFrag = do_QueryInterface(aTargetNode);
NS_ASSERTION(domFrag,
"If script execution isn't prevented, must parse to DOM fragment.");
}
#endif
mTreeBuilder->SetPreventScriptExecution(aPreventScriptExecution);
Tokenize(aSourceBuffer, doc, true);
return NS_OK;
}
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);
Tokenize(aSourceBuffer, aTargetDoc, aScriptingEnabledForNoscriptParsing);
return NS_OK;
}
void
nsHtml5StringParser::Tokenize(const nsAString& aSourceBuffer,
nsIDocument* aDocument,
bool aScriptingEnabledForNoscriptParsing) {
nsIURI* uri = aDocument->GetDocumentURI();
mExecutor->Init(aDocument, uri, nullptr, nullptr);
mExecutor->SetParser(this);
mExecutor->SetNodeInfoManager(aDocument->NodeInfoManager());
NS_PRECONDITION(!mExecutor->HasStarted(),
"Tried to start parse without initializing the parser.");
mTreeBuilder->setScriptingEnabled(aScriptingEnabledForNoscriptParsing);
mTokenizer->start();
mExecutor->Start(); // Don't call WillBuildModel in fragment case
if (!aSourceBuffer.IsEmpty()) {
bool lastWasCR = false;
nsHtml5DependentUTF16Buffer buffer(aSourceBuffer);
while (buffer.hasMore()) {
buffer.adjust(lastWasCR);
lastWasCR = false;
if (buffer.hasMore()) {
lastWasCR = mTokenizer->tokenizeBuffer(&buffer);
if (mTreeBuilder->HasScript()) {
// If we come here, we are in createContextualFragment() or in the
// upcoming document.parse(). It's unclear if it's really necessary
// to flush here, but let's do so for consistency with other flushes
// to avoid different code paths on the executor side.
mTreeBuilder->Flush(); // Move ops to the executor
mExecutor->FlushDocumentWrite(); // run the ops
}
}
}
}
mTokenizer->eof();
mTreeBuilder->StreamEnded();
mTreeBuilder->Flush();
mExecutor->FlushDocumentWrite();
mTokenizer->end();
mExecutor->DropParserAndPerfHint();
mExecutor->DropHeldElements();
mTreeBuilder->DropHandles();
mAtomTable.Clear();
mExecutor->Reset();
}
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