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qqmlvmemetaobject.cpp
1143 lines (964 loc) · 38.8 KB
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qqmlvmemetaobject.cpp
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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the QtQml module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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.
**
** 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.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qqmlvmemetaobject_p.h"
#include "qqml.h"
#include <private/qqmlrefcount_p.h>
#include "qqmlexpression.h"
#include "qqmlexpression_p.h"
#include "qqmlcontext_p.h"
#include "qqmlbinding_p.h"
#include "qqmlpropertyvalueinterceptor_p.h"
#include <private/qv8variantresource_p.h>
Q_DECLARE_METATYPE(QJSValue);
QT_BEGIN_NAMESPACE
QQmlVMEVariantQObjectPtr::QQmlVMEVariantQObjectPtr()
: QQmlGuard<QObject>(0), m_target(0), m_index(-1)
{
}
QQmlVMEVariantQObjectPtr::~QQmlVMEVariantQObjectPtr()
{
}
void QQmlVMEVariantQObjectPtr::objectDestroyed(QObject *)
{
if (m_target && m_index >= 0)
m_target->activate(m_target->object, m_target->methodOffset + m_index, 0);
}
void QQmlVMEVariantQObjectPtr::setGuardedValue(QObject *obj, QQmlVMEMetaObject *target, int index)
{
m_target = target;
m_index = index;
setObject(obj);
}
class QQmlVMEVariant
{
public:
inline QQmlVMEVariant();
inline ~QQmlVMEVariant();
inline const void *dataPtr() const;
inline void *dataPtr();
inline int dataType() const;
inline QObject *asQObject();
inline const QVariant &asQVariant();
inline int asInt();
inline bool asBool();
inline double asDouble();
inline const QString &asQString();
inline const QUrl &asQUrl();
inline const QColor &asQColor();
inline const QTime &asQTime();
inline const QDate &asQDate();
inline const QDateTime &asQDateTime();
inline const QJSValue &asQJSValue();
inline void setValue(QObject *v, QQmlVMEMetaObject *target, int index);
inline void setValue(const QVariant &);
inline void setValue(int);
inline void setValue(bool);
inline void setValue(double);
inline void setValue(const QString &);
inline void setValue(const QUrl &);
inline void setValue(const QColor &);
inline void setValue(const QTime &);
inline void setValue(const QDate &);
inline void setValue(const QDateTime &);
inline void setValue(const QJSValue &);
private:
int type;
void *data[6]; // Large enough to hold all types
inline void cleanup();
};
class QQmlVMEMetaObjectEndpoint : public QQmlNotifierEndpoint
{
public:
QQmlVMEMetaObjectEndpoint();
static void vmecallback(QQmlNotifierEndpoint *);
void tryConnect();
QFlagPointer<QQmlVMEMetaObject> metaObject;
};
QQmlVMEVariant::QQmlVMEVariant()
: type(QVariant::Invalid)
{
}
QQmlVMEVariant::~QQmlVMEVariant()
{
cleanup();
}
void QQmlVMEVariant::cleanup()
{
if (type == QVariant::Invalid) {
} else if (type == QMetaType::Int ||
type == QMetaType::Bool ||
type == QMetaType::Double) {
type = QVariant::Invalid;
} else if (type == QMetaType::QObjectStar) {
((QQmlVMEVariantQObjectPtr*)dataPtr())->~QQmlVMEVariantQObjectPtr();
type = QVariant::Invalid;
} else if (type == QMetaType::QString) {
((QString *)dataPtr())->~QString();
type = QVariant::Invalid;
} else if (type == QMetaType::QUrl) {
((QUrl *)dataPtr())->~QUrl();
type = QVariant::Invalid;
} else if (type == QMetaType::QColor) {
((QColor *)dataPtr())->~QColor();
type = QVariant::Invalid;
} else if (type == QMetaType::QTime) {
((QTime *)dataPtr())->~QTime();
type = QVariant::Invalid;
} else if (type == QMetaType::QDate) {
((QDate *)dataPtr())->~QDate();
type = QVariant::Invalid;
} else if (type == QMetaType::QDateTime) {
((QDateTime *)dataPtr())->~QDateTime();
type = QVariant::Invalid;
} else if (type == qMetaTypeId<QVariant>()) {
((QVariant *)dataPtr())->~QVariant();
type = QVariant::Invalid;
} else if (type == qMetaTypeId<QJSValue>()) {
((QJSValue *)dataPtr())->~QJSValue();
type = QVariant::Invalid;
}
}
int QQmlVMEVariant::dataType() const
{
return type;
}
const void *QQmlVMEVariant::dataPtr() const
{
return &data;
}
void *QQmlVMEVariant::dataPtr()
{
return &data;
}
QObject *QQmlVMEVariant::asQObject()
{
if (type != QMetaType::QObjectStar)
setValue((QObject *)0, 0, -1);
return *(QQmlGuard<QObject> *)(dataPtr());
}
const QVariant &QQmlVMEVariant::asQVariant()
{
if (type != QMetaType::QVariant)
setValue(QVariant());
return *(QVariant *)(dataPtr());
}
int QQmlVMEVariant::asInt()
{
if (type != QMetaType::Int)
setValue(int(0));
return *(int *)(dataPtr());
}
bool QQmlVMEVariant::asBool()
{
if (type != QMetaType::Bool)
setValue(bool(false));
return *(bool *)(dataPtr());
}
double QQmlVMEVariant::asDouble()
{
if (type != QMetaType::Double)
setValue(double(0));
return *(double *)(dataPtr());
}
const QString &QQmlVMEVariant::asQString()
{
if (type != QMetaType::QString)
setValue(QString());
return *(QString *)(dataPtr());
}
const QUrl &QQmlVMEVariant::asQUrl()
{
if (type != QMetaType::QUrl)
setValue(QUrl());
return *(QUrl *)(dataPtr());
}
const QColor &QQmlVMEVariant::asQColor()
{
if (type != QMetaType::QColor)
setValue(QColor());
return *(QColor *)(dataPtr());
}
const QTime &QQmlVMEVariant::asQTime()
{
if (type != QMetaType::QTime)
setValue(QTime());
return *(QTime *)(dataPtr());
}
const QDate &QQmlVMEVariant::asQDate()
{
if (type != QMetaType::QDate)
setValue(QDate());
return *(QDate *)(dataPtr());
}
const QDateTime &QQmlVMEVariant::asQDateTime()
{
if (type != QMetaType::QDateTime)
setValue(QDateTime());
return *(QDateTime *)(dataPtr());
}
const QJSValue &QQmlVMEVariant::asQJSValue()
{
if (type != qMetaTypeId<QJSValue>())
setValue(QJSValue());
return *(QJSValue *)(dataPtr());
}
void QQmlVMEVariant::setValue(QObject *v, QQmlVMEMetaObject *target, int index)
{
if (type != QMetaType::QObjectStar) {
cleanup();
type = QMetaType::QObjectStar;
new (dataPtr()) QQmlVMEVariantQObjectPtr;
}
reinterpret_cast<QQmlVMEVariantQObjectPtr*>(dataPtr())->setGuardedValue(v, target, index);
}
void QQmlVMEVariant::setValue(const QVariant &v)
{
if (type != qMetaTypeId<QVariant>()) {
cleanup();
type = qMetaTypeId<QVariant>();
new (dataPtr()) QVariant(v);
} else {
*(QVariant *)(dataPtr()) = v;
}
}
void QQmlVMEVariant::setValue(int v)
{
if (type != QMetaType::Int) {
cleanup();
type = QMetaType::Int;
}
*(int *)(dataPtr()) = v;
}
void QQmlVMEVariant::setValue(bool v)
{
if (type != QMetaType::Bool) {
cleanup();
type = QMetaType::Bool;
}
*(bool *)(dataPtr()) = v;
}
void QQmlVMEVariant::setValue(double v)
{
if (type != QMetaType::Double) {
cleanup();
type = QMetaType::Double;
}
*(double *)(dataPtr()) = v;
}
void QQmlVMEVariant::setValue(const QString &v)
{
if (type != QMetaType::QString) {
cleanup();
type = QMetaType::QString;
new (dataPtr()) QString(v);
} else {
*(QString *)(dataPtr()) = v;
}
}
void QQmlVMEVariant::setValue(const QUrl &v)
{
if (type != QMetaType::QUrl) {
cleanup();
type = QMetaType::QUrl;
new (dataPtr()) QUrl(v);
} else {
*(QUrl *)(dataPtr()) = v;
}
}
void QQmlVMEVariant::setValue(const QColor &v)
{
if (type != QMetaType::QColor) {
cleanup();
type = QMetaType::QColor;
new (dataPtr()) QColor(v);
} else {
*(QColor *)(dataPtr()) = v;
}
}
void QQmlVMEVariant::setValue(const QTime &v)
{
if (type != QMetaType::QTime) {
cleanup();
type = QMetaType::QTime;
new (dataPtr()) QTime(v);
} else {
*(QTime *)(dataPtr()) = v;
}
}
void QQmlVMEVariant::setValue(const QDate &v)
{
if (type != QMetaType::QDate) {
cleanup();
type = QMetaType::QDate;
new (dataPtr()) QDate(v);
} else {
*(QDate *)(dataPtr()) = v;
}
}
void QQmlVMEVariant::setValue(const QDateTime &v)
{
if (type != QMetaType::QDateTime) {
cleanup();
type = QMetaType::QDateTime;
new (dataPtr()) QDateTime(v);
} else {
*(QDateTime *)(dataPtr()) = v;
}
}
void QQmlVMEVariant::setValue(const QJSValue &v)
{
if (type != qMetaTypeId<QJSValue>()) {
cleanup();
type = qMetaTypeId<QJSValue>();
new (dataPtr()) QJSValue(v);
} else {
*(QJSValue *)(dataPtr()) = v;
}
}
QQmlVMEMetaObjectEndpoint::QQmlVMEMetaObjectEndpoint()
{
callback = &vmecallback;
}
void QQmlVMEMetaObjectEndpoint::vmecallback(QQmlNotifierEndpoint *e)
{
QQmlVMEMetaObjectEndpoint *vmee = static_cast<QQmlVMEMetaObjectEndpoint*>(e);
vmee->tryConnect();
}
void QQmlVMEMetaObjectEndpoint::tryConnect()
{
int aliasId = this - metaObject->aliasEndpoints;
if (metaObject.flag()) {
// This is actually notify
int sigIdx = metaObject->methodOffset + aliasId + metaObject->metaData->propertyCount;
QMetaObject::activate(metaObject->object, sigIdx, 0);
} else {
QQmlVMEMetaData::AliasData *d = metaObject->metaData->aliasData() + aliasId;
if (!d->isObjectAlias()) {
QQmlContextData *ctxt = metaObject->ctxt;
QObject *target = ctxt->idValues[d->contextIdx].data();
if (!target)
return;
QMetaProperty prop = target->metaObject()->property(d->propertyIndex());
if (prop.hasNotifySignal())
connect(target, prop.notifySignalIndex());
}
metaObject.setFlag();
}
}
QQmlVMEMetaObject::QQmlVMEMetaObject(QObject *obj,
const QMetaObject *other,
const QQmlVMEMetaData *meta,
QQmlCompiledData *cdata)
: QV8GCCallback::Node(GcPrologueCallback), object(obj), compiledData(cdata),
ctxt(QQmlData::get(obj, true)->outerContext), metaData(meta), data(0),
aliasEndpoints(0), firstVarPropertyIndex(-1), varPropertiesInitialized(false),
v8methods(0), parent(0)
{
compiledData->addref();
*static_cast<QMetaObject *>(this) = *other;
this->d.superdata = obj->metaObject();
QObjectPrivate *op = QObjectPrivate::get(obj);
if (op->metaObject)
parent = static_cast<QAbstractDynamicMetaObject*>(op->metaObject);
op->metaObject = this;
propOffset = QAbstractDynamicMetaObject::propertyOffset();
methodOffset = QAbstractDynamicMetaObject::methodOffset();
data = new QQmlVMEVariant[metaData->propertyCount - metaData->varPropertyCount];
aConnected.resize(metaData->aliasCount);
int list_type = qMetaTypeId<QQmlListProperty<QObject> >();
// ### Optimize
for (int ii = 0; ii < metaData->propertyCount - metaData->varPropertyCount; ++ii) {
int t = (metaData->propertyData() + ii)->propertyType;
if (t == list_type) {
listProperties.append(List(methodOffset + ii));
data[ii].setValue(listProperties.count() - 1);
}
}
firstVarPropertyIndex = metaData->propertyCount - metaData->varPropertyCount;
if (metaData->varPropertyCount)
QV8GCCallback::addGcCallbackNode(this);
}
QQmlVMEMetaObject::~QQmlVMEMetaObject()
{
compiledData->release();
delete parent;
delete [] data;
delete [] aliasEndpoints;
for (int ii = 0; v8methods && ii < metaData->methodCount; ++ii) {
qPersistentDispose(v8methods[ii]);
}
delete [] v8methods;
if (metaData->varPropertyCount)
qPersistentDispose(varProperties); // if not weak, will not have been cleaned up by the callback.
}
int QQmlVMEMetaObject::metaCall(QMetaObject::Call c, int _id, void **a)
{
int id = _id;
if(c == QMetaObject::WriteProperty) {
int flags = *reinterpret_cast<int*>(a[3]);
if (!(flags & QQmlPropertyPrivate::BypassInterceptor)
&& !aInterceptors.isEmpty()
&& aInterceptors.testBit(id)) {
QPair<int, QQmlPropertyValueInterceptor*> pair = interceptors.value(id);
int valueIndex = pair.first;
QQmlPropertyValueInterceptor *vi = pair.second;
int type = property(id).userType();
if (type != QVariant::Invalid) {
if (valueIndex != -1) {
QQmlEnginePrivate *ep = ctxt?QQmlEnginePrivate::get(ctxt->engine):0;
QQmlValueType *valueType = 0;
if (ep) valueType = ep->valueTypes[type];
else valueType = QQmlValueTypeFactory::valueType(type);
Q_ASSERT(valueType);
valueType->setValue(QVariant(type, a[0]));
QMetaProperty valueProp = valueType->metaObject()->property(valueIndex);
vi->write(valueProp.read(valueType));
if (!ep) delete valueType;
return -1;
} else {
vi->write(QVariant(type, a[0]));
return -1;
}
}
}
}
if (c == QMetaObject::ReadProperty || c == QMetaObject::WriteProperty || c == QMetaObject::ResetProperty) {
if (id >= propOffset) {
id -= propOffset;
if (id < metaData->propertyCount) {
int t = (metaData->propertyData() + id)->propertyType;
bool needActivate = false;
if (id >= firstVarPropertyIndex) {
Q_ASSERT(t == QMetaType::QVariant);
// the context can be null if accessing var properties from cpp after re-parenting an item.
QQmlEnginePrivate *ep = (ctxt == 0 || ctxt->engine == 0) ? 0 : QQmlEnginePrivate::get(ctxt->engine);
QV8Engine *v8e = (ep == 0) ? 0 : ep->v8engine();
if (v8e) {
v8::HandleScope handleScope;
v8::Context::Scope contextScope(v8e->context());
if (c == QMetaObject::ReadProperty) {
*reinterpret_cast<QVariant *>(a[0]) = readPropertyAsVariant(id);
} else if (c == QMetaObject::WriteProperty) {
writeProperty(id, *reinterpret_cast<QVariant *>(a[0]));
}
} else if (c == QMetaObject::ReadProperty) {
// if the context was disposed, we just return an invalid variant from read.
*reinterpret_cast<QVariant *>(a[0]) = QVariant();
}
} else {
if (c == QMetaObject::ReadProperty) {
switch(t) {
case QVariant::Int:
*reinterpret_cast<int *>(a[0]) = data[id].asInt();
break;
case QVariant::Bool:
*reinterpret_cast<bool *>(a[0]) = data[id].asBool();
break;
case QVariant::Double:
*reinterpret_cast<double *>(a[0]) = data[id].asDouble();
break;
case QVariant::String:
*reinterpret_cast<QString *>(a[0]) = data[id].asQString();
break;
case QVariant::Url:
*reinterpret_cast<QUrl *>(a[0]) = data[id].asQUrl();
break;
case QVariant::Color:
*reinterpret_cast<QColor *>(a[0]) = data[id].asQColor();
break;
case QVariant::Date:
*reinterpret_cast<QDate *>(a[0]) = data[id].asQDate();
break;
case QVariant::DateTime:
*reinterpret_cast<QDateTime *>(a[0]) = data[id].asQDateTime();
break;
case QMetaType::QObjectStar:
*reinterpret_cast<QObject **>(a[0]) = data[id].asQObject();
break;
case QMetaType::QVariant:
*reinterpret_cast<QVariant *>(a[0]) = readPropertyAsVariant(id);
break;
default:
break;
}
if (t == qMetaTypeId<QQmlListProperty<QObject> >()) {
int listIndex = data[id].asInt();
const List *list = &listProperties.at(listIndex);
*reinterpret_cast<QQmlListProperty<QObject> *>(a[0]) =
QQmlListProperty<QObject>(object, (void *)list,
list_append, list_count, list_at,
list_clear);
}
} else if (c == QMetaObject::WriteProperty) {
switch(t) {
case QVariant::Int:
needActivate = *reinterpret_cast<int *>(a[0]) != data[id].asInt();
data[id].setValue(*reinterpret_cast<int *>(a[0]));
break;
case QVariant::Bool:
needActivate = *reinterpret_cast<bool *>(a[0]) != data[id].asBool();
data[id].setValue(*reinterpret_cast<bool *>(a[0]));
break;
case QVariant::Double:
needActivate = *reinterpret_cast<double *>(a[0]) != data[id].asDouble();
data[id].setValue(*reinterpret_cast<double *>(a[0]));
break;
case QVariant::String:
needActivate = *reinterpret_cast<QString *>(a[0]) != data[id].asQString();
data[id].setValue(*reinterpret_cast<QString *>(a[0]));
break;
case QVariant::Url:
needActivate = *reinterpret_cast<QUrl *>(a[0]) != data[id].asQUrl();
data[id].setValue(*reinterpret_cast<QUrl *>(a[0]));
break;
case QVariant::Color:
needActivate = *reinterpret_cast<QColor *>(a[0]) != data[id].asQColor();
data[id].setValue(*reinterpret_cast<QColor *>(a[0]));
break;
case QVariant::Date:
needActivate = *reinterpret_cast<QDate *>(a[0]) != data[id].asQDate();
data[id].setValue(*reinterpret_cast<QDate *>(a[0]));
break;
case QVariant::DateTime:
needActivate = *reinterpret_cast<QDateTime *>(a[0]) != data[id].asQDateTime();
data[id].setValue(*reinterpret_cast<QDateTime *>(a[0]));
break;
case QMetaType::QObjectStar:
needActivate = *reinterpret_cast<QObject **>(a[0]) != data[id].asQObject();
data[id].setValue(*reinterpret_cast<QObject **>(a[0]), this, id);
break;
case QMetaType::QVariant:
writeProperty(id, *reinterpret_cast<QVariant *>(a[0]));
break;
default:
break;
}
}
}
if (c == QMetaObject::WriteProperty && needActivate) {
activate(object, methodOffset + id, 0);
}
return -1;
}
id -= metaData->propertyCount;
if (id < metaData->aliasCount) {
QQmlVMEMetaData::AliasData *d = metaData->aliasData() + id;
if (d->flags & QML_ALIAS_FLAG_PTR && c == QMetaObject::ReadProperty)
*reinterpret_cast<void **>(a[0]) = 0;
if (!ctxt) return -1;
QQmlContext *context = ctxt->asQQmlContext();
QQmlContextPrivate *ctxtPriv = QQmlContextPrivate::get(context);
QObject *target = ctxtPriv->data->idValues[d->contextIdx].data();
if (!target)
return -1;
connectAlias(id);
if (d->isObjectAlias()) {
*reinterpret_cast<QObject **>(a[0]) = target;
return -1;
}
// Remove binding (if any) on write
if(c == QMetaObject::WriteProperty) {
int flags = *reinterpret_cast<int*>(a[3]);
if (flags & QQmlPropertyPrivate::RemoveBindingOnAliasWrite) {
QQmlData *targetData = QQmlData::get(target);
if (targetData && targetData->hasBindingBit(d->propertyIndex())) {
QQmlAbstractBinding *binding = QQmlPropertyPrivate::setBinding(target, d->propertyIndex(), d->isValueTypeAlias()?d->valueTypeIndex():-1, 0);
if (binding) binding->destroy();
}
}
}
if (d->isValueTypeAlias()) {
// Value type property
QQmlEnginePrivate *ep = QQmlEnginePrivate::get(ctxt->engine);
QQmlValueType *valueType = ep->valueTypes[d->valueType()];
Q_ASSERT(valueType);
valueType->read(target, d->propertyIndex());
int rv = QMetaObject::metacall(valueType, c, d->valueTypeIndex(), a);
if (c == QMetaObject::WriteProperty)
valueType->write(target, d->propertyIndex(), 0x00);
return rv;
} else {
return QMetaObject::metacall(target, c, d->propertyIndex(), a);
}
}
return -1;
}
} else if(c == QMetaObject::InvokeMetaMethod) {
if (id >= methodOffset) {
id -= methodOffset;
int plainSignals = metaData->signalCount + metaData->propertyCount +
metaData->aliasCount;
if (id < plainSignals) {
QMetaObject::activate(object, _id, a);
return -1;
}
id -= plainSignals;
if (id < metaData->methodCount) {
if (!ctxt->engine)
return -1; // We can't run the method
QQmlEnginePrivate *ep = QQmlEnginePrivate::get(ctxt->engine);
ep->referenceScarceResources(); // "hold" scarce resources in memory during evaluation.
v8::Handle<v8::Function> function = method(id);
if (function.IsEmpty()) {
// The function was not compiled. There are some exceptional cases which the
// expression rewriter does not rewrite properly (e.g., \r-terminated lines
// are not rewritten correctly but this bug is deemed out-of-scope to fix for
// performance reasons; see QTBUG-24064) and thus compilation will have failed.
QQmlError e;
e.setDescription(QString(QLatin1String("Exception occurred during compilation of function: %1")).
arg(QLatin1String(QMetaObject::method(_id).signature())));
ep->warning(e);
return -1; // The dynamic method with that id is not available.
}
QQmlVMEMetaData::MethodData *data = metaData->methodData() + id;
v8::HandleScope handle_scope;
v8::Context::Scope scope(ep->v8engine()->context());
v8::Handle<v8::Value> *args = 0;
if (data->parameterCount) {
args = new v8::Handle<v8::Value>[data->parameterCount];
for (int ii = 0; ii < data->parameterCount; ++ii)
args[ii] = ep->v8engine()->fromVariant(*(QVariant *)a[ii + 1]);
}
v8::TryCatch try_catch;
v8::Local<v8::Value> result = function->Call(ep->v8engine()->global(), data->parameterCount, args);
QVariant rv;
if (try_catch.HasCaught()) {
QQmlError error;
QQmlExpressionPrivate::exceptionToError(try_catch.Message(), error);
if (error.isValid())
ep->warning(error);
if (a[0]) *(QVariant *)a[0] = QVariant();
} else {
if (a[0]) *(QVariant *)a[0] = ep->v8engine()->toVariant(result, 0);
}
ep->dereferenceScarceResources(); // "release" scarce resources if top-level expression evaluation is complete.
return -1;
}
return -1;
}
}
if (parent)
return parent->metaCall(c, _id, a);
else
return object->qt_metacall(c, _id, a);
}
v8::Handle<v8::Function> QQmlVMEMetaObject::method(int index)
{
if (!v8methods)
v8methods = new v8::Persistent<v8::Function>[metaData->methodCount];
if (v8methods[index].IsEmpty()) {
QQmlVMEMetaData::MethodData *data = metaData->methodData() + index;
const char *body = ((const char*)metaData) + data->bodyOffset;
int bodyLength = data->bodyLength;
// XXX We should evaluate all methods in a single big script block to
// improve the call time between dynamic methods defined on the same
// object
v8methods[index] = QQmlExpressionPrivate::evalFunction(ctxt, object, body,
bodyLength,
ctxt->urlString,
data->lineNumber);
}
return v8methods[index];
}
v8::Handle<v8::Value> QQmlVMEMetaObject::readVarProperty(int id)
{
Q_ASSERT(id >= firstVarPropertyIndex);
if (ensureVarPropertiesAllocated())
return varProperties->Get(id - firstVarPropertyIndex);
return v8::Handle<v8::Value>();
}
QVariant QQmlVMEMetaObject::readPropertyAsVariant(int id)
{
if (id >= firstVarPropertyIndex) {
if (ensureVarPropertiesAllocated())
return QQmlEnginePrivate::get(ctxt->engine)->v8engine()->toVariant(varProperties->Get(id - firstVarPropertyIndex), -1);
return QVariant();
} else {
if (data[id].dataType() == QMetaType::QObjectStar) {
return QVariant::fromValue(data[id].asQObject());
} else {
return data[id].asQVariant();
}
}
}
void QQmlVMEMetaObject::writeVarProperty(int id, v8::Handle<v8::Value> value)
{
Q_ASSERT(id >= firstVarPropertyIndex);
if (!ensureVarPropertiesAllocated())
return;
// Importantly, if the current value is a scarce resource, we need to ensure that it
// gets automatically released by the engine if no other references to it exist.
v8::Local<v8::Value> oldv = varProperties->Get(id - firstVarPropertyIndex);
if (oldv->IsObject()) {
QV8VariantResource *r = v8_resource_cast<QV8VariantResource>(v8::Handle<v8::Object>::Cast(oldv));
if (r) {
r->removeVmePropertyReference();
}
}
// And, if the new value is a scarce resource, we need to ensure that it does not get
// automatically released by the engine until no other references to it exist.
if (value->IsObject()) {
QV8VariantResource *r = v8_resource_cast<QV8VariantResource>(v8::Handle<v8::Object>::Cast(value));
if (r) {
r->addVmePropertyReference();
}
}
// Write the value and emit change signal as appropriate.
varProperties->Set(id - firstVarPropertyIndex, value);
activate(object, methodOffset + id, 0);
}
void QQmlVMEMetaObject::writeProperty(int id, const QVariant &value)
{
if (id >= firstVarPropertyIndex) {
if (!ensureVarPropertiesAllocated())
return;
// Importantly, if the current value is a scarce resource, we need to ensure that it
// gets automatically released by the engine if no other references to it exist.
v8::Local<v8::Value> oldv = varProperties->Get(id - firstVarPropertyIndex);
if (oldv->IsObject()) {
QV8VariantResource *r = v8_resource_cast<QV8VariantResource>(v8::Handle<v8::Object>::Cast(oldv));
if (r) {
r->removeVmePropertyReference();
}
}
// And, if the new value is a scarce resource, we need to ensure that it does not get
// automatically released by the engine until no other references to it exist.
v8::Handle<v8::Value> newv = QQmlEnginePrivate::get(ctxt->engine)->v8engine()->fromVariant(value);
if (newv->IsObject()) {
QV8VariantResource *r = v8_resource_cast<QV8VariantResource>(v8::Handle<v8::Object>::Cast(newv));
if (r) {
r->addVmePropertyReference();
}
}
// Write the value and emit change signal as appropriate.
QVariant currentValue = readPropertyAsVariant(id);
varProperties->Set(id - firstVarPropertyIndex, newv);
if ((currentValue.userType() != value.userType() || currentValue != value))
activate(object, methodOffset + id, 0);
} else {
bool needActivate = false;
if (value.userType() == QMetaType::QObjectStar) {
QObject *o = qvariant_cast<QObject *>(value);
needActivate = (data[id].dataType() != QMetaType::QObjectStar || data[id].asQObject() != o);
data[id].setValue(qvariant_cast<QObject *>(value), this, id);
} else {
needActivate = (data[id].dataType() != qMetaTypeId<QVariant>() ||
data[id].asQVariant().userType() != value.userType() ||
data[id].asQVariant() != value);
data[id].setValue(value);
}
if (needActivate)
activate(object, methodOffset + id, 0);
}
}
void QQmlVMEMetaObject::listChanged(int id)
{
activate(object, methodOffset + id, 0);
}
void QQmlVMEMetaObject::list_append(QQmlListProperty<QObject> *prop, QObject *o)
{
List *list = static_cast<List *>(prop->data);
list->append(o);
QMetaObject::activate(prop->object, list->notifyIndex, 0);
}
int QQmlVMEMetaObject::list_count(QQmlListProperty<QObject> *prop)
{
return static_cast<List *>(prop->data)->count();
}
QObject *QQmlVMEMetaObject::list_at(QQmlListProperty<QObject> *prop, int index)
{
return static_cast<List *>(prop->data)->at(index);
}
void QQmlVMEMetaObject::list_clear(QQmlListProperty<QObject> *prop)
{
List *list = static_cast<List *>(prop->data);
list->clear();
QMetaObject::activate(prop->object, list->notifyIndex, 0);
}
void QQmlVMEMetaObject::registerInterceptor(int index, int valueIndex, QQmlPropertyValueInterceptor *interceptor)
{
if (aInterceptors.isEmpty())
aInterceptors.resize(propertyCount() + metaData->propertyCount);
aInterceptors.setBit(index);
interceptors.insert(index, qMakePair(valueIndex, interceptor));
}
int QQmlVMEMetaObject::vmeMethodLineNumber(int index)
{
if (index < methodOffset) {
Q_ASSERT(parent);
return static_cast<QQmlVMEMetaObject *>(parent)->vmeMethodLineNumber(index);
}
int plainSignals = metaData->signalCount + metaData->propertyCount + metaData->aliasCount;
Q_ASSERT(index >= (methodOffset + plainSignals) && index < (methodOffset + plainSignals + metaData->methodCount));
int rawIndex = index - methodOffset - plainSignals;
QQmlVMEMetaData::MethodData *data = metaData->methodData() + rawIndex;
return data->lineNumber;
}
v8::Handle<v8::Function> QQmlVMEMetaObject::vmeMethod(int index)
{
if (index < methodOffset) {
Q_ASSERT(parent);
return static_cast<QQmlVMEMetaObject *>(parent)->vmeMethod(index);
}
int plainSignals = metaData->signalCount + metaData->propertyCount + metaData->aliasCount;
Q_ASSERT(index >= (methodOffset + plainSignals) && index < (methodOffset + plainSignals + metaData->methodCount));
return method(index - methodOffset - plainSignals);
}
// Used by debugger
void QQmlVMEMetaObject::setVmeMethod(int index, v8::Persistent<v8::Function> value)
{