pjs/parser/html/nsHtml5StringParser.cpp

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5.9 KiB
C++

/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Pierre Phaneuf <pp@ludusdesign.com>
* Henri Sivonen <hsivonen@iki.fi>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#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, nsnull))
, 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,
PRInt32 aContextNamespace,
bool aQuirks,
bool aPreventScriptExecution)
{
NS_ENSURE_TRUE(aSourceBuffer.Length() <= PR_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
mExecutor->EnableFragmentMode(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() <= PR_INT32_MAX,
NS_ERROR_OUT_OF_MEMORY);
mTreeBuilder->setFragmentContext(nsnull,
kNameSpaceID_None,
nsnull,
false);
mExecutor->PreventScriptExecution();
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, nsnull, nsnull);
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()) {
// Flush on each script, because the execution prevention code
// can handle at most one script per flush.
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();
}