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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qbs.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "scriptimporter.h"
#include "evaluator.h"
#include "scriptengine.h"
#include <parser/qmljsastfwd_p.h>
#include <parser/qmljsastvisitor_p.h>
#include <parser/qmljslexer_p.h>
#include <parser/qmljsparser_p.h>
#include <tools/error.h>
#include <QtScript/qscriptvalueiterator.h>
namespace qbs {
namespace Internal {
class IdentifierExtractor : private QbsQmlJS::AST::Visitor
{
public:
void start(QbsQmlJS::AST::Node *node)
{
m_first = true;
m_barrier = false;
m_suffix += QLatin1String("\nreturn {");
if (node)
node->accept(this);
m_suffix += QLatin1String("}})()");
}
const QString &suffix() const { return m_suffix; }
private:
bool visit(QbsQmlJS::AST::SourceElements *) override
{
// Only consider the top level of source elements.
if (m_barrier)
return false;
m_barrier = true;
return true;
}
void endVisit(QbsQmlJS::AST::SourceElements *) override
{
m_barrier = false;
}
bool visit(QbsQmlJS::AST::FunctionSourceElement *fse) override
{
add(fse->declaration->name);
return false;
}
bool visit(QbsQmlJS::AST::VariableDeclaration *vd) override
{
add(vd->name);
return false;
}
void add(const QStringRef &name)
{
if (m_first) {
m_first = false;
m_suffix.reserve(m_suffix.length() + name.length() * 2 + 1);
} else {
m_suffix.reserve(m_suffix.length() + name.length() * 2 + 2);
m_suffix += QLatin1Char(',');
}
m_suffix += name;
m_suffix += QLatin1Char(':');
m_suffix += name;
}
bool m_first = false;
bool m_barrier = false;
QString m_suffix;
};
ScriptImporter::ScriptImporter(ScriptEngine *scriptEngine)
: m_engine(scriptEngine)
{
}
QScriptValue ScriptImporter::importSourceCode(const QString &sourceCode, const QString &filePath,
QScriptValue &targetObject)
{
Q_ASSERT(targetObject.isObject());
// The targetObject doesn't get overwritten but enhanced by the contents of the .js file.
// This is necessary for library imports that consist of multiple js files.
QString &code = m_sourceCodeCache[filePath];
if (code.isEmpty()) {
QbsQmlJS::Engine engine;
QbsQmlJS::Lexer lexer(&engine);
lexer.setCode(sourceCode, 1, false);
QbsQmlJS::Parser parser(&engine);
if (!parser.parseProgram()) {
throw ErrorInfo(parser.errorMessage(), CodeLocation(filePath, parser.errorLineNumber(),
parser.errorColumnNumber()));
}
IdentifierExtractor extractor;
extractor.start(parser.rootNode());
code = QLatin1String("(function(){\n") + sourceCode + extractor.suffix();
}
QScriptValue result = m_engine->evaluate(code, filePath, 0);
throwOnEvaluationError(m_engine, result, [&filePath] () { return CodeLocation(filePath, 0); });
copyProperties(result, targetObject);
return result;
}
void ScriptImporter::copyProperties(const QScriptValue &src, QScriptValue &dst)
{
QScriptValueIterator it(src);
while (it.hasNext()) {
it.next();
dst.setProperty(it.name(), it.value());
}
}
} // namespace Internal
} // namespace qbs
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