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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtDeclarative module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qmlrewrite_p.h"
#include <QtCore/qdebug.h>
#include "qmlglobal_p.h"
QT_BEGIN_NAMESPACE
DEFINE_BOOL_CONFIG_OPTION(rewriteDump, QML_REWRITE_DUMP);
namespace QmlRewrite {
bool SharedBindingTester::isSharable(const QString &code)
{
Engine engine;
NodePool pool(QString(), &engine);
Lexer lexer(&engine);
Parser parser(&engine);
lexer.setCode(code, 0);
parser.parseStatement();
if (!parser.statement())
return false;
_sharable = true;
AST::Node::acceptChild(parser.statement(), this);
return _sharable;
}
QString RewriteBinding::operator()(const QString &code, bool *ok)
{
Engine engine;
NodePool pool(QString(), &engine);
Lexer lexer(&engine);
Parser parser(&engine);
lexer.setCode(code, 0);
parser.parseStatement();
if (!parser.statement()) {
if (ok) *ok = false;
return QString();
} else {
if (ok) *ok = true;
}
return rewrite(code, 0, parser.statement());
}
void RewriteBinding::accept(AST::Node *node)
{
AST::Node::acceptChild(node, this);
}
QString RewriteBinding::rewrite(QString code, unsigned position,
AST::Statement *node)
{
TextWriter w;
_writer = &w;
_position = position;
_inLoop = 0;
accept(node);
unsigned startOfStatement = node->firstSourceLocation().begin() - _position;
unsigned endOfStatement = node->lastSourceLocation().end() - _position;
_writer->replace(startOfStatement, 0, QLatin1String("(function() { "));
_writer->replace(endOfStatement, 0, QLatin1String(" })"));
if (rewriteDump()) {
qWarning() << "=============================================================";
qWarning() << "Rewrote:";
qWarning() << qPrintable(code);
}
w.write(&code);
if (rewriteDump()) {
qWarning() << "To:";
qWarning() << qPrintable(code);
qWarning() << "=============================================================";
}
return code;
}
bool RewriteBinding::visit(AST::Block *ast)
{
for (AST::StatementList *it = ast->statements; it; it = it->next) {
if (! it->next) {
// we need to rewrite only the last statement of a block.
accept(it->statement);
}
}
return false;
}
bool RewriteBinding::visit(AST::ExpressionStatement *ast)
{
if (! _inLoop) {
unsigned startOfExpressionStatement = ast->firstSourceLocation().begin() - _position;
_writer->replace(startOfExpressionStatement, 0, QLatin1String("return "));
}
return false;
}
bool RewriteBinding::visit(AST::DoWhileStatement *)
{
++_inLoop;
return true;
}
void RewriteBinding::endVisit(AST::DoWhileStatement *)
{
--_inLoop;
}
bool RewriteBinding::visit(AST::WhileStatement *)
{
++_inLoop;
return true;
}
void RewriteBinding::endVisit(AST::WhileStatement *)
{
--_inLoop;
}
bool RewriteBinding::visit(AST::ForStatement *)
{
++_inLoop;
return true;
}
void RewriteBinding::endVisit(AST::ForStatement *)
{
--_inLoop;
}
bool RewriteBinding::visit(AST::LocalForStatement *)
{
++_inLoop;
return true;
}
void RewriteBinding::endVisit(AST::LocalForStatement *)
{
--_inLoop;
}
bool RewriteBinding::visit(AST::ForEachStatement *)
{
++_inLoop;
return true;
}
void RewriteBinding::endVisit(AST::ForEachStatement *)
{
--_inLoop;
}
bool RewriteBinding::visit(AST::LocalForEachStatement *)
{
++_inLoop;
return true;
}
void RewriteBinding::endVisit(AST::LocalForEachStatement *)
{
--_inLoop;
}
} // namespace QmlRewrite
QT_END_NAMESPACE
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