diff options
Diffstat (limited to 'src/qml/qml/v8/qv8variantwrapper.cpp')
-rw-r--r-- | src/qml/qml/v8/qv8variantwrapper.cpp | 279 |
1 files changed, 279 insertions, 0 deletions
diff --git a/src/qml/qml/v8/qv8variantwrapper.cpp b/src/qml/qml/v8/qv8variantwrapper.cpp new file mode 100644 index 0000000000..4b1fc643f6 --- /dev/null +++ b/src/qml/qml/v8/qv8variantwrapper.cpp @@ -0,0 +1,279 @@ +/**************************************************************************** +** +** 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 "qv8variantwrapper_p.h" +#include "qv8variantresource_p.h" +#include "qv8engine_p.h" +#include <private/qqmlengine_p.h> + +QT_BEGIN_NAMESPACE + +QV8VariantResource::QV8VariantResource(QV8Engine *engine, const QVariant &data) +: QV8ObjectResource(engine), QQmlEnginePrivate::ScarceResourceData(data), m_isScarceResource(false), m_vmePropertyReferenceCount(0) +{ +} + +void QV8VariantResource::addVmePropertyReference() +{ + if (m_isScarceResource && ++m_vmePropertyReferenceCount == 1) { + // remove from the ep->scarceResources list + // since it is now no longer eligible to be + // released automatically by the engine. + node.remove(); + } +} + +void QV8VariantResource::removeVmePropertyReference() +{ + if (m_isScarceResource && --m_vmePropertyReferenceCount == 0) { + // and add to the ep->scarceResources list + // since it is now eligible to be released + // automatically by the engine. + QQmlEnginePrivate::get(engine->engine())->scarceResources.insert(this); + } +} + +QV8VariantWrapper::QV8VariantWrapper() +: m_engine(0) +{ +} + +QV8VariantWrapper::~QV8VariantWrapper() +{ +} + +void QV8VariantWrapper::init(QV8Engine *engine) +{ + m_engine = engine; + m_toString = qPersistentNew<v8::Function>(v8::FunctionTemplate::New(ToString)->GetFunction()); + m_valueOf = qPersistentNew<v8::Function>(v8::FunctionTemplate::New(ValueOf)->GetFunction()); + + { + v8::Local<v8::FunctionTemplate> ft = v8::FunctionTemplate::New(); + ft->InstanceTemplate()->SetFallbackPropertyHandler(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)); + ft->InstanceTemplate()->SetAccessor(v8::String::New("valueOf"), ValueOfGetter, 0, + m_valueOf, v8::DEFAULT, + v8::PropertyAttribute(v8::ReadOnly | v8::DontDelete)); + m_constructor = qPersistentNew<v8::Function>(ft->GetFunction()); + } + { + m_preserve = qPersistentNew<v8::Function>(v8::FunctionTemplate::New(Preserve)->GetFunction()); + m_destroy = qPersistentNew<v8::Function>(v8::FunctionTemplate::New(Destroy)->GetFunction()); + v8::Local<v8::FunctionTemplate> ft = v8::FunctionTemplate::New(); + ft->InstanceTemplate()->SetFallbackPropertyHandler(Getter, Setter); + ft->InstanceTemplate()->SetHasExternalResource(true); + ft->InstanceTemplate()->MarkAsUseUserObjectComparison(); + ft->InstanceTemplate()->SetAccessor(v8::String::New("preserve"), PreserveGetter, 0, + m_preserve, v8::DEFAULT, + v8::PropertyAttribute(v8::ReadOnly | v8::DontDelete)); + ft->InstanceTemplate()->SetAccessor(v8::String::New("destroy"), DestroyGetter, 0, + m_destroy, v8::DEFAULT, + v8::PropertyAttribute(v8::ReadOnly | v8::DontDelete)); + ft->InstanceTemplate()->SetAccessor(v8::String::New("toString"), ToStringGetter, 0, + m_toString, v8::DEFAULT, + v8::PropertyAttribute(v8::ReadOnly | v8::DontDelete)); + ft->InstanceTemplate()->SetAccessor(v8::String::New("valueOf"), ValueOfGetter, 0, + m_valueOf, v8::DEFAULT, + v8::PropertyAttribute(v8::ReadOnly | v8::DontDelete)); + m_scarceConstructor = qPersistentNew<v8::Function>(ft->GetFunction()); + } + +} + +void QV8VariantWrapper::destroy() +{ + qPersistentDispose(m_valueOf); + qPersistentDispose(m_toString); + qPersistentDispose(m_destroy); + qPersistentDispose(m_preserve); + qPersistentDispose(m_scarceConstructor); + qPersistentDispose(m_constructor); +} + +v8::Local<v8::Object> QV8VariantWrapper::newVariant(const QVariant &value) +{ + bool scarceResource = value.type() == QVariant::Pixmap || + value.type() == QVariant::Image; + + // XXX NewInstance() should be optimized + v8::Local<v8::Object> rv; + QV8VariantResource *r = new QV8VariantResource(m_engine, value); + + if (scarceResource) { + QQmlEnginePrivate *ep = QQmlEnginePrivate::get(m_engine->engine()); + Q_ASSERT(ep->scarceResourcesRefCount); + rv = m_scarceConstructor->NewInstance(); + r->m_isScarceResource = true; + ep->scarceResources.insert(r); + } else { + rv = m_constructor->NewInstance(); + } + + rv->SetExternalResource(r); + return rv; +} + +bool QV8VariantWrapper::isVariant(v8::Handle<v8::Value> value) +{ + return value->IsObject() && v8_resource_cast<QV8VariantResource>(value->ToObject()); +} + +QVariant QV8VariantWrapper::toVariant(v8::Handle<v8::Object> obj) +{ + QV8VariantResource *r = v8_resource_cast<QV8VariantResource>(obj); + return r?r->data:QVariant(); +} + +QVariant QV8VariantWrapper::toVariant(QV8ObjectResource *r) +{ + Q_ASSERT(r->resourceType() == QV8ObjectResource::VariantType); + return static_cast<QV8VariantResource *>(r)->data; +} + +QVariant &QV8VariantWrapper::variantValue(v8::Handle<v8::Value> value) +{ + Q_ASSERT(isVariant(value)); + QV8VariantResource *r = v8_resource_cast<QV8VariantResource>(value->ToObject()); + return static_cast<QV8VariantResource *>(r)->data; +} + +v8::Handle<v8::Value> QV8VariantWrapper::Getter(v8::Local<v8::String> /* property */, + const v8::AccessorInfo & /* info */) +{ + return v8::Handle<v8::Value>(); +} + +v8::Handle<v8::Value> QV8VariantWrapper::Setter(v8::Local<v8::String> /* property */, + v8::Local<v8::Value> value, + const v8::AccessorInfo & /* info */) +{ + return value; +} + +v8::Handle<v8::Value> QV8VariantWrapper::PreserveGetter(v8::Local<v8::String> property, + const v8::AccessorInfo &info) +{ + Q_UNUSED(property); + return info.Data(); +} + +v8::Handle<v8::Value> QV8VariantWrapper::DestroyGetter(v8::Local<v8::String> property, + const v8::AccessorInfo &info) +{ + Q_UNUSED(property); + return info.Data(); +} + +v8::Handle<v8::Value> QV8VariantWrapper::ToStringGetter(v8::Local<v8::String> property, + const v8::AccessorInfo &info) +{ + Q_UNUSED(property); + return info.Data(); +} + +v8::Handle<v8::Value> QV8VariantWrapper::ValueOfGetter(v8::Local<v8::String> property, + const v8::AccessorInfo &info) +{ + Q_UNUSED(property); + return info.Data(); +} + +v8::Handle<v8::Value> QV8VariantWrapper::Preserve(const v8::Arguments &args) +{ + QV8VariantResource *resource = v8_resource_cast<QV8VariantResource>(args.This()); + if (resource) { + resource->node.remove(); + } + return v8::Undefined(); +} + +v8::Handle<v8::Value> QV8VariantWrapper::Destroy(const v8::Arguments &args) +{ + QV8VariantResource *resource = v8_resource_cast<QV8VariantResource>(args.This()); + if (resource) { + resource->data = QVariant(); + resource->node.remove(); + } + return v8::Undefined(); +} + +v8::Handle<v8::Value> QV8VariantWrapper::ToString(const v8::Arguments &args) +{ + QV8VariantResource *resource = v8_resource_cast<QV8VariantResource>(args.This()); + if (resource) { + QString result = resource->data.toString(); + if (result.isEmpty() && !resource->data.canConvert(QVariant::String)) + result = QString::fromLatin1("QVariant(%0)").arg(QString::fromLatin1(resource->data.typeName())); + return resource->engine->toString(result); + } else { + return v8::Undefined(); + } +} + +v8::Handle<v8::Value> QV8VariantWrapper::ValueOf(const v8::Arguments &args) +{ + QV8VariantResource *resource = v8_resource_cast<QV8VariantResource>(args.This()); + if (resource) { + QVariant v = resource->data; + switch (v.type()) { + case QVariant::Invalid: + return v8::Undefined(); + case QVariant::String: + return resource->engine->toString(v.toString()); + case QVariant::Int: + case QVariant::Double: + case QVariant::UInt: + return v8::Number::New(v.toDouble()); + case QVariant::Bool: + return v8::Boolean::New(v.toBool()); + default: + break; + } + } + return args.This(); +} + +QT_END_NAMESPACE |