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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtScript module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL-ONLY$
** GNU Lesser General Public License Usage
** 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.
**
** If you have questions regarding the use of this file, please contact
** us via http://www.qt-project.org/.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "config.h"
#include "qscriptclassobject_p.h"
#include "../api/qscriptengine.h"
#include "../api/qscriptengine_p.h"
#include "../api/qscriptcontext.h"
#include "../api/qscriptcontext_p.h"
#include "../api/qscriptclass.h"
#include "../api/qscriptclasspropertyiterator.h"
#include "Error.h"
#include "PropertyNameArray.h"
Q_DECLARE_METATYPE(QScriptContext*)
Q_DECLARE_METATYPE(QScriptValue)
Q_DECLARE_METATYPE(QScriptValueList)
QT_BEGIN_NAMESPACE
namespace QScript
{
ClassObjectDelegate::ClassObjectDelegate(QScriptClass *scriptClass)
: m_scriptClass(scriptClass)
{
}
ClassObjectDelegate::~ClassObjectDelegate()
{
}
QScriptObjectDelegate::Type ClassObjectDelegate::type() const
{
return ClassObject;
}
bool ClassObjectDelegate::getOwnPropertySlot(QScriptObject* object,
JSC::ExecState *exec,
const JSC::Identifier &propertyName,
JSC::PropertySlot &slot)
{
QScriptEnginePrivate *engine = scriptEngineFromExec(exec);
QScript::SaveFrameHelper saveFrame(engine, exec);
// for compatibility with the old back-end, normal JS properties
// are queried first.
if (QScriptObjectDelegate::getOwnPropertySlot(object, exec, propertyName, slot))
return true;
QScriptValue scriptObject = engine->scriptValueFromJSCValue(object);
QScriptString scriptName;
QScriptStringPrivate scriptName_d(engine, propertyName, QScriptStringPrivate::StackAllocated);
QScriptStringPrivate::init(scriptName, &scriptName_d);
uint id = 0;
QScriptClass::QueryFlags flags = m_scriptClass->queryProperty(
scriptObject, scriptName, QScriptClass::HandlesReadAccess, &id);
if (flags & QScriptClass::HandlesReadAccess) {
QScriptValue value = m_scriptClass->property(scriptObject, scriptName, id);
if (!value.isValid()) {
// The class claims to have the property, but returned an invalid
// value. Silently convert to undefined to avoid the invalid value
// "escaping" into JS.
value = QScriptValue(QScriptValue::UndefinedValue);
}
slot.setValue(engine->scriptValueToJSCValue(value));
return true;
}
return false;
}
bool ClassObjectDelegate::getOwnPropertyDescriptor(QScriptObject *object,
JSC::ExecState *exec,
const JSC::Identifier &propertyName,
JSC::PropertyDescriptor &descriptor)
{
QScriptEnginePrivate *engine = scriptEngineFromExec(exec);
QScript::SaveFrameHelper saveFrame(engine, exec);
// for compatibility with the old back-end, normal JS properties
// are queried first.
if (QScriptObjectDelegate::getOwnPropertyDescriptor(object, exec, propertyName, descriptor))
return true;
QScriptValue scriptObject = engine->scriptValueFromJSCValue(object);
QScriptString scriptName;
QScriptStringPrivate scriptName_d(engine, propertyName, QScriptStringPrivate::StackAllocated);
QScriptStringPrivate::init(scriptName, &scriptName_d);
uint id = 0;
QScriptClass::QueryFlags qflags = m_scriptClass->queryProperty(
scriptObject, scriptName, QScriptClass::HandlesReadAccess, &id);
if (qflags & QScriptClass::HandlesReadAccess) {
QScriptValue::PropertyFlags pflags = m_scriptClass->propertyFlags(scriptObject, scriptName, id);
unsigned attribs = 0;
if (pflags & QScriptValue::ReadOnly)
attribs |= JSC::ReadOnly;
if (pflags & QScriptValue::SkipInEnumeration)
attribs |= JSC::DontEnum;
if (pflags & QScriptValue::Undeletable)
attribs |= JSC::DontDelete;
if (pflags & QScriptValue::PropertyGetter)
attribs |= JSC::Getter;
if (pflags & QScriptValue::PropertySetter)
attribs |= JSC::Setter;
attribs |= pflags & QScriptValue::UserRange;
// Rather than calling the getter, we could return an access descriptor here.
QScriptValue value = m_scriptClass->property(scriptObject, scriptName, id);
if (!value.isValid()) {
// The class claims to have the property, but returned an invalid
// value. Silently convert to undefined to avoid the invalid value
// "escaping" into JS.
value = QScriptValue(QScriptValue::UndefinedValue);
}
descriptor.setDescriptor(engine->scriptValueToJSCValue(value), attribs);
return true;
}
return false;
}
void ClassObjectDelegate::put(QScriptObject* object, JSC::ExecState *exec,
const JSC::Identifier &propertyName,
JSC::JSValue value, JSC::PutPropertySlot &slot)
{
QScriptEnginePrivate *engine = scriptEngineFromExec(exec);
QScript::SaveFrameHelper saveFrame(engine, exec);
QScriptValue scriptObject = engine->scriptValueFromJSCValue(object);
QScriptString scriptName;
QScriptStringPrivate scriptName_d(engine, propertyName, QScriptStringPrivate::StackAllocated);
QScriptStringPrivate::init(scriptName, &scriptName_d);
uint id = 0;
QScriptClass::QueryFlags flags = m_scriptClass->queryProperty(
scriptObject, scriptName, QScriptClass::HandlesWriteAccess, &id);
if (flags & QScriptClass::HandlesWriteAccess) {
m_scriptClass->setProperty(scriptObject, scriptName, id, engine->scriptValueFromJSCValue(value));
return;
}
QScriptObjectDelegate::put(object, exec, propertyName, value, slot);
}
bool ClassObjectDelegate::deleteProperty(QScriptObject* object, JSC::ExecState *exec,
const JSC::Identifier &propertyName)
{
// ### avoid duplication of put()
QScriptEnginePrivate *engine = scriptEngineFromExec(exec);
QScript::SaveFrameHelper saveFrame(engine, exec);
QScriptValue scriptObject = engine->scriptValueFromJSCValue(object);
QScriptString scriptName;
QScriptStringPrivate scriptName_d(engine, propertyName, QScriptStringPrivate::StackAllocated);
QScriptStringPrivate::init(scriptName, &scriptName_d);
uint id = 0;
QScriptClass::QueryFlags flags = m_scriptClass->queryProperty(
scriptObject, scriptName, QScriptClass::HandlesWriteAccess, &id);
if (flags & QScriptClass::HandlesWriteAccess) {
if (m_scriptClass->propertyFlags(scriptObject, scriptName, id) & QScriptValue::Undeletable)
return false;
m_scriptClass->setProperty(scriptObject, scriptName, id, QScriptValue());
return true;
}
return QScriptObjectDelegate::deleteProperty(object, exec, propertyName);
}
void ClassObjectDelegate::getOwnPropertyNames(QScriptObject* object, JSC::ExecState *exec,
JSC::PropertyNameArray &propertyNames,
JSC::EnumerationMode mode)
{
// For compatibility with the old back-end, normal JS properties
// are added first.
QScriptObjectDelegate::getOwnPropertyNames(object, exec, propertyNames, mode);
QScriptEnginePrivate *engine = scriptEngineFromExec(exec);
QScript::SaveFrameHelper saveFrame(engine, exec);
QScriptValue scriptObject = engine->scriptValueFromJSCValue(object);
QScriptClassPropertyIterator *it = m_scriptClass->newIterator(scriptObject);
if (it != 0) {
while (it->hasNext()) {
it->next();
QString name = it->name().toString();
propertyNames.add(JSC::Identifier(exec, name));
}
delete it;
}
}
JSC::CallType ClassObjectDelegate::getCallData(QScriptObject*, JSC::CallData &callData)
{
if (!m_scriptClass->supportsExtension(QScriptClass::Callable))
return JSC::CallTypeNone;
callData.native.function = call;
return JSC::CallTypeHost;
}
JSC::JSValue JSC_HOST_CALL ClassObjectDelegate::call(JSC::ExecState *exec, JSC::JSObject *callee,
JSC::JSValue thisValue, const JSC::ArgList &args)
{
if (!callee->inherits(&QScriptObject::info))
return JSC::throwError(exec, JSC::TypeError, "callee is not a ClassObject object");
QScriptObject *obj = static_cast<QScriptObject*>(callee);
QScriptObjectDelegate *delegate = obj->delegate();
if (!delegate || (delegate->type() != QScriptObjectDelegate::ClassObject))
return JSC::throwError(exec, JSC::TypeError, "callee is not a ClassObject object");
QScriptClass *scriptClass = static_cast<ClassObjectDelegate*>(delegate)->scriptClass();
QScriptEnginePrivate *eng_p = scriptEngineFromExec(exec);
JSC::ExecState *oldFrame = eng_p->currentFrame;
eng_p->pushContext(exec, thisValue, args, callee);
QScriptContext *ctx = eng_p->contextForFrame(eng_p->currentFrame);
QScriptValue scriptObject = eng_p->scriptValueFromJSCValue(obj);
QVariant result = scriptClass->extension(QScriptClass::Callable, QVariant::fromValue(ctx));
eng_p->popContext();
eng_p->currentFrame = oldFrame;
return QScriptEnginePrivate::jscValueFromVariant(exec, result);
}
JSC::ConstructType ClassObjectDelegate::getConstructData(QScriptObject*, JSC::ConstructData &constructData)
{
if (!m_scriptClass->supportsExtension(QScriptClass::Callable))
return JSC::ConstructTypeNone;
constructData.native.function = construct;
return JSC::ConstructTypeHost;
}
JSC::JSObject* ClassObjectDelegate::construct(JSC::ExecState *exec, JSC::JSObject *callee,
const JSC::ArgList &args)
{
Q_ASSERT(callee->inherits(&QScriptObject::info));
QScriptObject *obj = static_cast<QScriptObject*>(callee);
QScriptObjectDelegate *delegate = obj->delegate();
QScriptClass *scriptClass = static_cast<ClassObjectDelegate*>(delegate)->scriptClass();
QScriptEnginePrivate *eng_p = scriptEngineFromExec(exec);
JSC::ExecState *oldFrame = eng_p->currentFrame;
eng_p->pushContext(exec, JSC::JSValue(), args, callee, true);
QScriptContext *ctx = eng_p->contextForFrame(eng_p->currentFrame);
QScriptValue defaultObject = ctx->thisObject();
QScriptValue result = qvariant_cast<QScriptValue>(scriptClass->extension(QScriptClass::Callable, QVariant::fromValue(ctx)));
if (!result.isObject())
result = defaultObject;
eng_p->popContext();
eng_p->currentFrame = oldFrame;
return JSC::asObject(eng_p->scriptValueToJSCValue(result));
}
bool ClassObjectDelegate::hasInstance(QScriptObject* object, JSC::ExecState *exec,
JSC::JSValue value, JSC::JSValue proto)
{
if (!scriptClass()->supportsExtension(QScriptClass::HasInstance))
return QScriptObjectDelegate::hasInstance(object, exec, value, proto);
QScriptValueList args;
QScriptEnginePrivate *eng_p = scriptEngineFromExec(exec);
QScript::SaveFrameHelper saveFrame(eng_p, exec);
args << eng_p->scriptValueFromJSCValue(object) << eng_p->scriptValueFromJSCValue(value);
QVariant result = scriptClass()->extension(QScriptClass::HasInstance, QVariant::fromValue(args));
return result.toBool();
}
} // namespace QScript
QT_END_NAMESPACE
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