diff options
Diffstat (limited to 'src/qml/qml/v8/qv8valuetypewrapper.cpp')
| -rw-r--r-- | src/qml/qml/v8/qv8valuetypewrapper.cpp | 452 |
1 files changed, 0 insertions, 452 deletions
diff --git a/src/qml/qml/v8/qv8valuetypewrapper.cpp b/src/qml/qml/v8/qv8valuetypewrapper.cpp deleted file mode 100644 index d5d977d9c4..0000000000 --- a/src/qml/qml/v8/qv8valuetypewrapper.cpp +++ /dev/null @@ -1,452 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies). -** Contact: http://www.qt-project.org/legal -** -** This file is part of the QtQml module of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** 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 Digia. For licensing terms and -** conditions see http://qt.digia.com/licensing. For further information -** use the contact form at http://qt.digia.com/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 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, Digia gives you certain additional -** rights. These rights are described in the Digia 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. -** -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "qv8valuetypewrapper_p.h" -#include "qv8engine_p.h" - -#include <private/qqmlvaluetype_p.h> -#include <private/qqmlbinding_p.h> -#include <private/qqmlglobal_p.h> - -QT_BEGIN_NAMESPACE - -class QV8ValueTypeResource : public QV8ObjectResource -{ - V8_RESOURCE_TYPE(ValueTypeType) - -public: - enum ObjectType { Reference, Copy }; - - QV8ValueTypeResource(QV8Engine *engine, ObjectType objectType); - - ObjectType objectType; - QQmlValueType *type; -}; - -class QV8ValueTypeReferenceResource : public QV8ValueTypeResource -{ -public: - QV8ValueTypeReferenceResource(QV8Engine *engine); - - QQmlGuard<QObject> object; - int property; -}; - -class QV8ValueTypeCopyResource : public QV8ValueTypeResource -{ -public: - QV8ValueTypeCopyResource(QV8Engine *engine); - - QVariant value; -}; - -QV8ValueTypeResource::QV8ValueTypeResource(QV8Engine *engine, ObjectType objectType) -: QV8ObjectResource(engine), objectType(objectType) -{ -} - -QV8ValueTypeReferenceResource::QV8ValueTypeReferenceResource(QV8Engine *engine) -: QV8ValueTypeResource(engine, Reference) -{ -} - -QV8ValueTypeCopyResource::QV8ValueTypeCopyResource(QV8Engine *engine) -: QV8ValueTypeResource(engine, Copy) -{ -} - -QV8ValueTypeWrapper::QV8ValueTypeWrapper() -: m_engine(0) -{ -} - -QV8ValueTypeWrapper::~QV8ValueTypeWrapper() -{ -} - -void QV8ValueTypeWrapper::destroy() -{ - qPersistentDispose(m_toString); - qPersistentDispose(m_constructor); - qPersistentDispose(m_toStringSymbol); -} - -static quint32 toStringHash = -1; - -void QV8ValueTypeWrapper::init(QV8Engine *engine) -{ - m_engine = engine; - m_toString = qPersistentNew<v8::Function>(v8::FunctionTemplate::New(ToString)->GetFunction()); - v8::Local<v8::FunctionTemplate> ft = v8::FunctionTemplate::New(); - ft->InstanceTemplate()->SetNamedPropertyHandler(Getter, Setter); - ft->InstanceTemplate()->SetHasExternalResource(true); - ft->InstanceTemplate()->MarkAsUseUserObjectComparison(); - ft->InstanceTemplate()->SetAccessor(v8::String::New("toString"), ToStringGetter, 0, - m_toString, v8::DEFAULT, - v8::PropertyAttribute(v8::ReadOnly | v8::DontDelete)); - m_constructor = qPersistentNew<v8::Function>(ft->GetFunction()); - - m_toStringSymbol = qPersistentNew<v8::String>(v8::String::NewSymbol("toString")); - m_toStringString = QHashedV8String(m_toStringSymbol); - toStringHash = m_toStringString.hash(); -} - -v8::Local<v8::Object> QV8ValueTypeWrapper::newValueType(QObject *object, int property, QQmlValueType *type) -{ - // XXX NewInstance() should be optimized - v8::Local<v8::Object> rv = m_constructor->NewInstance(); - QV8ValueTypeReferenceResource *r = new QV8ValueTypeReferenceResource(m_engine); - r->type = type; r->object = object; r->property = property; - rv->SetExternalResource(r); - return rv; -} - -v8::Local<v8::Object> QV8ValueTypeWrapper::newValueType(const QVariant &value, QQmlValueType *type) -{ - // XXX NewInstance() should be optimized - v8::Local<v8::Object> rv = m_constructor->NewInstance(); - QV8ValueTypeCopyResource *r = new QV8ValueTypeCopyResource(m_engine); - r->type = type; r->value = value; - rv->SetExternalResource(r); - return rv; -} - -static bool readReferenceValue(QV8ValueTypeReferenceResource *reference) -{ - // A reference resource may be either a "true" reference (eg, to a QVector3D property) - // or a "variant" reference (eg, to a QVariant property which happens to contain a value-type). - QMetaProperty writebackProperty = reference->object->metaObject()->property(reference->property); - if (writebackProperty.userType() == QMetaType::QVariant) { - // variant-containing-value-type reference - QVariant variantReferenceValue; - reference->type->readVariantValue(reference->object, reference->property, &variantReferenceValue); - int variantReferenceType = variantReferenceValue.userType(); - if (variantReferenceType != reference->type->userType()) { - // This is a stale VariantReference. That is, the variant has been - // overwritten with a different type in the meantime. - // We need to modify this reference to the updated value type, if - // possible, or return false if it is not a value type. - if (QQmlValueTypeFactory::isValueType(variantReferenceType)) { - reference->type = QQmlValueTypeFactory::valueType(variantReferenceType); - if (!reference->type) { - return false; - } - } else { - return false; - } - } - reference->type->setValue(variantReferenceValue); - } else { - // value-type reference - reference->type->read(reference->object, reference->property); - } - return true; -} - -bool QV8ValueTypeWrapper::isValueType(v8::Handle<v8::Object> obj) const -{ - QV8ValueTypeResource *r = v8_resource_cast<QV8ValueTypeResource>(obj); - return (r != 0); -} - -QVariant QV8ValueTypeWrapper::toVariant(v8::Handle<v8::Object> obj, int typeHint, bool *succeeded) -{ - // NOTE: obj must not be an external resource object (ie, wrapper object) - // instead, it is a normal js object which one of the value-type providers - // may know how to convert to the given type. - return QQml_valueTypeProvider()->createVariantFromJsObject(typeHint, QQmlV8Handle::fromHandle(obj), m_engine, succeeded); -} - -QVariant QV8ValueTypeWrapper::toVariant(v8::Handle<v8::Object> obj) -{ - QV8ValueTypeResource *r = v8_resource_cast<QV8ValueTypeResource>(obj); - if (r) return toVariant(r); - else return QVariant(); -} - -QVariant QV8ValueTypeWrapper::toVariant(QV8ObjectResource *r) -{ - Q_ASSERT(r->resourceType() == QV8ObjectResource::ValueTypeType); - QV8ValueTypeResource *resource = static_cast<QV8ValueTypeResource *>(r); - - if (resource->objectType == QV8ValueTypeResource::Reference) { - QV8ValueTypeReferenceResource *reference = static_cast<QV8ValueTypeReferenceResource *>(resource); - - if (reference->object && readReferenceValue(reference)) { - return reference->type->value(); - } else { - return QVariant(); - } - - } else { - Q_ASSERT(resource->objectType == QV8ValueTypeResource::Copy); - - QV8ValueTypeCopyResource *copy = static_cast<QV8ValueTypeCopyResource *>(resource); - - return copy->value; - } -} - -bool QV8ValueTypeWrapper::isEqual(QV8ObjectResource *r, const QVariant& value) -{ - Q_ASSERT(r->resourceType() == QV8ObjectResource::ValueTypeType); - QV8ValueTypeResource *resource = static_cast<QV8ValueTypeResource *>(r); - - if (resource->objectType == QV8ValueTypeResource::Reference) { - QV8ValueTypeReferenceResource *reference = static_cast<QV8ValueTypeReferenceResource *>(resource); - if (reference->object && readReferenceValue(reference)) { - return reference->type->isEqual(value); - } else { - return false; - } - } else { - Q_ASSERT(resource->objectType == QV8ValueTypeResource::Copy); - QV8ValueTypeCopyResource *copy = static_cast<QV8ValueTypeCopyResource *>(resource); - resource->type->setValue(copy->value); - if (resource->type->isEqual(value)) - return true; - return (value == copy->value); - } -} - -v8::Handle<v8::Value> QV8ValueTypeWrapper::ToStringGetter(v8::Local<v8::String> property, - const v8::AccessorInfo &info) -{ - Q_UNUSED(property); - return info.Data(); -} - -v8::Handle<v8::Value> QV8ValueTypeWrapper::ToString(const v8::Arguments &args) -{ - QV8ValueTypeResource *resource = v8_resource_cast<QV8ValueTypeResource>(args.This()); - if (resource) { - if (resource->objectType == QV8ValueTypeResource::Reference) { - QV8ValueTypeReferenceResource *reference = static_cast<QV8ValueTypeReferenceResource *>(resource); - if (reference->object && readReferenceValue(reference)) { - return resource->engine->toString(resource->type->toString()); - } else { - return v8::Undefined(); - } - } else { - Q_ASSERT(resource->objectType == QV8ValueTypeResource::Copy); - QV8ValueTypeCopyResource *copy = static_cast<QV8ValueTypeCopyResource *>(resource); - resource->type->setValue(copy->value); - return resource->engine->toString(resource->type->toString()); - } - } else { - return v8::Undefined(); - } -} - -v8::Handle<v8::Value> QV8ValueTypeWrapper::Getter(v8::Local<v8::String> property, - const v8::AccessorInfo &info) -{ - QV8ValueTypeResource *r = v8_resource_cast<QV8ValueTypeResource>(info.This()); - if (!r) return v8::Handle<v8::Value>(); - - QHashedV8String propertystring(property); - - { - // Comparing the hash first actually makes a measurable difference here, at least on x86 - quint32 hash = propertystring.hash(); - if (hash == toStringHash && - r->engine->valueTypeWrapper()->m_toStringString == propertystring) { - return r->engine->valueTypeWrapper()->m_toString; - } - } - - // Note: readReferenceValue() can change the reference->type. - if (r->objectType == QV8ValueTypeResource::Reference) { - QV8ValueTypeReferenceResource *reference = static_cast<QV8ValueTypeReferenceResource *>(r); - - if (!reference->object || !readReferenceValue(reference)) - return v8::Handle<v8::Value>(); - - } else { - Q_ASSERT(r->objectType == QV8ValueTypeResource::Copy); - - QV8ValueTypeCopyResource *copy = static_cast<QV8ValueTypeCopyResource *>(r); - - r->type->setValue(copy->value); - } - - QQmlPropertyData local; - QQmlPropertyData *result = 0; - { - QQmlData *ddata = QQmlData::get(r->type, false); - if (ddata && ddata->propertyCache) - result = ddata->propertyCache->property(propertystring, 0, 0); - else - result = QQmlPropertyCache::property(r->engine->engine(), r->type, - propertystring, 0, local); - } - - if (!result) - return v8::Handle<v8::Value>(); - - if (result->isFunction()) { - // calling a Q_INVOKABLE function of a value type - QQmlContextData *context = r->engine->callingContext(); - return r->engine->qobjectWrapper()->getProperty(r->type, propertystring, context, QV8QObjectWrapper::IgnoreRevision); - } - -#define VALUE_TYPE_LOAD(metatype, cpptype, constructor) \ - if (result->propType == metatype) { \ - cpptype v; \ - void *args[] = { &v, 0 }; \ - r->type->qt_metacall(QMetaObject::ReadProperty, result->coreIndex, args); \ - return constructor(v); \ - } - - // These four types are the most common used by the value type wrappers - VALUE_TYPE_LOAD(QMetaType::QReal, qreal, v8::Number::New); - VALUE_TYPE_LOAD(QMetaType::Int, int, v8::Integer::New); - VALUE_TYPE_LOAD(QMetaType::QString, QString, r->engine->toString); - VALUE_TYPE_LOAD(QMetaType::Bool, bool, v8::Boolean::New); - - QVariant v(result->propType, (void *)0); - void *args[] = { v.data(), 0 }; - r->type->qt_metacall(QMetaObject::ReadProperty, result->coreIndex, args); - return r->engine->fromVariant(v); -#undef VALUE_TYPE_ACCESSOR -} - -v8::Handle<v8::Value> QV8ValueTypeWrapper::Setter(v8::Local<v8::String> property, - v8::Local<v8::Value> value, - const v8::AccessorInfo &info) -{ - QV8ValueTypeResource *r = v8_resource_cast<QV8ValueTypeResource>(info.This()); - if (!r) return value; - - QByteArray propName = r->engine->toString(property).toUtf8(); - if (r->objectType == QV8ValueTypeResource::Reference) { - QV8ValueTypeReferenceResource *reference = static_cast<QV8ValueTypeReferenceResource *>(r); - QMetaProperty writebackProperty = reference->object->metaObject()->property(reference->property); - - if (!reference->object || !writebackProperty.isWritable() || !readReferenceValue(reference)) - return value; - - // we lookup the index after readReferenceValue() since it can change the reference->type. - int index = r->type->metaObject()->indexOfProperty(propName.constData()); - if (index == -1) - return value; - QMetaProperty p = r->type->metaObject()->property(index); - - QQmlBinding *newBinding = 0; - - if (value->IsFunction()) { - if (value->ToObject()->GetHiddenValue(r->engine->bindingFlagKey()).IsEmpty()) { - // assigning a JS function to a non-var-property is not allowed. - QString error = QLatin1String("Cannot assign JavaScript function to value-type property"); - v8::ThrowException(v8::Exception::Error(r->engine->toString(error))); - return value; - } - - QQmlContextData *context = r->engine->callingContext(); - v8::Handle<v8::Function> function = v8::Handle<v8::Function>::Cast(value); - - QQmlPropertyData cacheData; - cacheData.setFlags(QQmlPropertyData::IsWritable | - QQmlPropertyData::IsValueTypeVirtual); - cacheData.propType = reference->object->metaObject()->property(reference->property).userType(); - cacheData.coreIndex = reference->property; - cacheData.valueTypeFlags = 0; - cacheData.valueTypeCoreIndex = index; - cacheData.valueTypePropType = p.userType(); - - v8::Local<v8::StackTrace> trace = - v8::StackTrace::CurrentStackTrace(1, - (v8::StackTrace::StackTraceOptions)(v8::StackTrace::kLineNumber | - v8::StackTrace::kScriptName)); - v8::Local<v8::StackFrame> frame = trace->GetFrame(0); - int lineNumber = frame->GetLineNumber(); - int columnNumber = frame->GetColumn(); - QString url = r->engine->toString(frame->GetScriptName()); - - newBinding = new QQmlBinding(&function, reference->object, context, - url, qmlSourceCoordinate(lineNumber), qmlSourceCoordinate(columnNumber)); - newBinding->setTarget(reference->object, cacheData, context); - newBinding->setEvaluateFlags(newBinding->evaluateFlags() | - QQmlBinding::RequiresThisObject); - } - - QQmlAbstractBinding *oldBinding = - QQmlPropertyPrivate::setBinding(reference->object, reference->property, index, newBinding); - if (oldBinding) - oldBinding->destroy(); - - if (!value->IsFunction()) { - QVariant v = r->engine->toVariant(value, -1); - - if (p.isEnumType() && (QMetaType::Type)v.type() == QMetaType::Double) - v = v.toInt(); - - p.write(reference->type, v); - - if (writebackProperty.userType() == QMetaType::QVariant) { - QVariant variantReferenceValue = r->type->value(); - reference->type->writeVariantValue(reference->object, reference->property, 0, &variantReferenceValue); - } else { - reference->type->write(reference->object, reference->property, 0); - } - } - - } else { - Q_ASSERT(r->objectType == QV8ValueTypeResource::Copy); - - QV8ValueTypeCopyResource *copy = static_cast<QV8ValueTypeCopyResource *>(r); - - int index = r->type->metaObject()->indexOfProperty(propName.constData()); - if (index == -1) - return value; - - QVariant v = r->engine->toVariant(value, -1); - - r->type->setValue(copy->value); - QMetaProperty p = r->type->metaObject()->property(index); - p.write(r->type, v); - copy->value = r->type->value(); - } - - return value; -} - -QT_END_NAMESPACE |