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/*
Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies)
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#ifndef qscriptengine_p_h
#define qscriptengine_p_h
#include "qscriptconverter_p.h"
#include "qscriptengine.h"
#include "qscriptoriginalglobalobject_p.h"
#include "qscriptstring_p.h"
#include "qscriptsyntaxcheckresult_p.h"
#include "qscriptvalue.h"
#include <JavaScriptCore/JavaScript.h>
#include <JavaScriptCore/JSRetainPtr.h>
#include <JSBasePrivate.h>
#include <QtCore/qshareddata.h>
#include <QtCore/qstring.h>
#include <QtCore/qstringlist.h>
class QScriptEngine;
class QScriptSyntaxCheckResultPrivate;
class QScriptEnginePrivate : public QSharedData {
public:
static QScriptEnginePrivate* get(const QScriptEngine* q) { Q_ASSERT(q); return q->d_ptr.data(); }
static QScriptEngine* get(const QScriptEnginePrivate* d) { Q_ASSERT(d); return d->q_ptr; }
QScriptEnginePrivate(const QScriptEngine*);
~QScriptEnginePrivate();
enum SetExceptionFlag {
IgnoreNullException = 0x01,
NotNullException = 0x02,
};
QScriptSyntaxCheckResultPrivate* checkSyntax(const QString& program);
QScriptValuePrivate* evaluate(const QString& program, const QString& fileName, int lineNumber);
QScriptValuePrivate* evaluate(const QScriptProgramPrivate* program);
inline JSValueRef evaluate(JSStringRef program, JSStringRef fileName, int lineNumber);
inline bool hasUncaughtException() const;
QScriptValuePrivate* uncaughtException() const;
inline void clearExceptions();
inline void setException(JSValueRef exception, const /* SetExceptionFlags */ unsigned flags = IgnoreNullException);
inline int uncaughtExceptionLineNumber() const;
inline QStringList uncaughtExceptionBacktrace() const;
inline void collectGarbage();
inline void reportAdditionalMemoryCost(int cost);
inline JSValueRef makeJSValue(double number) const;
inline JSValueRef makeJSValue(int number) const;
inline JSValueRef makeJSValue(uint number) const;
inline JSValueRef makeJSValue(const QString& string) const;
inline JSValueRef makeJSValue(bool number) const;
inline JSValueRef makeJSValue(QScriptValue::SpecialValue value) const;
QScriptValuePrivate* newFunction(QScriptEngine::FunctionSignature fun, QScriptValuePrivate* prototype, int length);
QScriptValuePrivate* newFunction(QScriptEngine::FunctionWithArgSignature fun, void* arg);
QScriptValuePrivate* newFunction(JSObjectRef funObject, QScriptValuePrivate* prototype);
QScriptValuePrivate* newObject() const;
QScriptValuePrivate* newArray(uint length);
QScriptValuePrivate* globalObject() const;
inline QScriptStringPrivate* toStringHandle(const QString& str) const;
inline operator JSGlobalContextRef() const;
inline bool isArray(JSValueRef value) const;
inline bool isError(JSValueRef value) const;
inline bool objectHasOwnProperty(JSObjectRef object, JSStringRef property) const;
inline QVector<JSStringRef> objectGetOwnPropertyNames(JSObjectRef object) const;
private:
QScriptEngine* q_ptr;
JSGlobalContextRef m_context;
JSValueRef m_exception;
QScriptOriginalGlobalObject m_originalGlobalObject;
JSClassRef m_nativeFunctionClass;
JSClassRef m_nativeFunctionWithArgClass;
};
/*!
Evaluates given JavaScript program and returns result of the evaluation.
\attention this function doesn't take ownership of the parameters.
\internal
*/
JSValueRef QScriptEnginePrivate::evaluate(JSStringRef program, JSStringRef fileName, int lineNumber)
{
JSValueRef exception;
JSValueRef result = JSEvaluateScript(m_context, program, /* Global Object */ 0, fileName, lineNumber, &exception);
if (!result) {
setException(exception, NotNullException);
return exception; // returns an exception
}
clearExceptions();
return result;
}
bool QScriptEnginePrivate::hasUncaughtException() const
{
return m_exception;
}
void QScriptEnginePrivate::clearExceptions()
{
if (m_exception)
JSValueUnprotect(m_context, m_exception);
m_exception = 0;
}
void QScriptEnginePrivate::setException(JSValueRef exception, const /* SetExceptionFlags */ unsigned flags)
{
if (!((flags & NotNullException) || exception))
return;
Q_ASSERT(exception);
if (m_exception)
JSValueUnprotect(m_context, m_exception);
JSValueProtect(m_context, exception);
m_exception = exception;
}
int QScriptEnginePrivate::uncaughtExceptionLineNumber() const
{
if (!hasUncaughtException() || !JSValueIsObject(m_context, m_exception))
return -1;
JSValueRef exception = 0;
JSRetainPtr<JSStringRef> lineNumberPropertyName(Adopt, QScriptConverter::toString("line"));
JSValueRef lineNumber = JSObjectGetProperty(m_context, const_cast<JSObjectRef>(m_exception), lineNumberPropertyName.get(), &exception);
int result = JSValueToNumber(m_context, lineNumber, &exception);
return exception ? -1 : result;
}
QStringList QScriptEnginePrivate::uncaughtExceptionBacktrace() const
{
if (!hasUncaughtException() || !JSValueIsObject(m_context, m_exception))
return QStringList();
JSValueRef exception = 0;
JSRetainPtr<JSStringRef> fileNamePropertyName(Adopt, QScriptConverter::toString("sourceURL"));
JSRetainPtr<JSStringRef> lineNumberPropertyName(Adopt, QScriptConverter::toString("line"));
JSValueRef jsFileName = JSObjectGetProperty(m_context, const_cast<JSObjectRef>(m_exception), fileNamePropertyName.get(), &exception);
JSValueRef jsLineNumber = JSObjectGetProperty(m_context, const_cast<JSObjectRef>(m_exception), lineNumberPropertyName.get(), &exception);
JSRetainPtr<JSStringRef> fileName(Adopt, JSValueToStringCopy(m_context, jsFileName, &exception));
int lineNumber = JSValueToNumber(m_context, jsLineNumber, &exception);
return QStringList(QString::fromLatin1("<anonymous>()@%0:%1")
.arg(QScriptConverter::toString(fileName.get()))
.arg(QScriptConverter::toString(exception ? -1 : lineNumber)));
}
void QScriptEnginePrivate::collectGarbage()
{
JSGarbageCollect(m_context);
}
void QScriptEnginePrivate::reportAdditionalMemoryCost(int cost)
{
if (cost > 0)
JSReportExtraMemoryCost(m_context, cost);
}
JSValueRef QScriptEnginePrivate::makeJSValue(double number) const
{
return JSValueMakeNumber(m_context, number);
}
JSValueRef QScriptEnginePrivate::makeJSValue(int number) const
{
return JSValueMakeNumber(m_context, number);
}
JSValueRef QScriptEnginePrivate::makeJSValue(uint number) const
{
return JSValueMakeNumber(m_context, number);
}
JSValueRef QScriptEnginePrivate::makeJSValue(const QString& string) const
{
JSStringRef tmp = QScriptConverter::toString(string);
JSValueRef result = JSValueMakeString(m_context, tmp);
JSStringRelease(tmp);
return result;
}
JSValueRef QScriptEnginePrivate::makeJSValue(bool value) const
{
return JSValueMakeBoolean(m_context, value);
}
JSValueRef QScriptEnginePrivate::makeJSValue(QScriptValue::SpecialValue value) const
{
if (value == QScriptValue::NullValue)
return JSValueMakeNull(m_context);
return JSValueMakeUndefined(m_context);
}
QScriptStringPrivate* QScriptEnginePrivate::toStringHandle(const QString& str) const
{
return new QScriptStringPrivate(str);
}
QScriptEnginePrivate::operator JSGlobalContextRef() const
{
Q_ASSERT(this);
return m_context;
}
bool QScriptEnginePrivate::isArray(JSValueRef value) const
{
return m_originalGlobalObject.isArray(value);
}
bool QScriptEnginePrivate::isError(JSValueRef value) const
{
return m_originalGlobalObject.isError(value);
}
inline bool QScriptEnginePrivate::objectHasOwnProperty(JSObjectRef object, JSStringRef property) const
{
// FIXME We need a JSC C API function for this.
return m_originalGlobalObject.objectHasOwnProperty(object, property);
}
inline QVector<JSStringRef> QScriptEnginePrivate::objectGetOwnPropertyNames(JSObjectRef object) const
{
// FIXME We can't use C API function JSObjectGetPropertyNames as it returns only enumerable properties.
return m_originalGlobalObject.objectGetOwnPropertyNames(object);
}
#endif
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