diff options
Diffstat (limited to 'src/declarative/qml/v8/qv8variantwrapper.cpp')
-rw-r--r-- | src/declarative/qml/v8/qv8variantwrapper.cpp | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/src/declarative/qml/v8/qv8variantwrapper.cpp b/src/declarative/qml/v8/qv8variantwrapper.cpp new file mode 100644 index 0000000000..2d91a335b2 --- /dev/null +++ b/src/declarative/qml/v8/qv8variantwrapper.cpp @@ -0,0 +1,190 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the QtDeclarative module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** 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, 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. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qv8variantwrapper_p.h" +#include "qv8engine_p.h" +#include "qdeclarativeengine_p.h" + +QT_BEGIN_NAMESPACE + +class QV8VariantResource : public QV8ObjectResource, + public QDeclarativeEnginePrivate::ScarceResourceData +{ + V8_RESOURCE_TYPE(VariantType); +public: + QV8VariantResource(QV8Engine *engine, const QVariant &data); +}; + +QV8VariantResource::QV8VariantResource(QV8Engine *engine, const QVariant &data) +: QV8ObjectResource(engine), QDeclarativeEnginePrivate::ScarceResourceData(data) +{ +} + +QV8VariantWrapper::QV8VariantWrapper() +: m_engine(0) +{ +} + +QV8VariantWrapper::~QV8VariantWrapper() +{ +} + +void QV8VariantWrapper::init(QV8Engine *engine) +{ + m_engine = engine; + { + v8::Local<v8::FunctionTemplate> ft = v8::FunctionTemplate::New(); + ft->InstanceTemplate()->SetNamedPropertyHandler(Getter, Setter); + ft->InstanceTemplate()->SetHasExternalResource(true); + m_constructor = v8::Persistent<v8::Function>::New(ft->GetFunction()); + } + { + m_preserve = v8::Persistent<v8::Function>::New(v8::FunctionTemplate::New(Preserve)->GetFunction()); + m_destroy = v8::Persistent<v8::Function>::New(v8::FunctionTemplate::New(Destroy)->GetFunction()); + v8::Local<v8::FunctionTemplate> ft = v8::FunctionTemplate::New(); + ft->InstanceTemplate()->SetFallbackPropertyHandler(Getter, Setter); + ft->InstanceTemplate()->SetHasExternalResource(true); + 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)); + m_scarceConstructor = v8::Persistent<v8::Function>::New(ft->GetFunction()); + } + +} + +void QV8VariantWrapper::destroy() +{ + m_destroy.Dispose(); + m_preserve.Dispose(); + m_scarceConstructor.Dispose(); + m_constructor.Dispose(); +} + +v8::Local<v8::Object> QV8VariantWrapper::newVariant(const QVariant &value) +{ + bool scarceResource = value.type() == QVariant::Pixmap || + value.type() == QVariant::Image; + + QDeclarativeEnginePrivate *ep = QDeclarativeEnginePrivate::get(m_engine->engine()); + + // XXX aakenned - NewInstance() is slow for our case + v8::Local<v8::Object> rv; + QV8VariantResource *r = new QV8VariantResource(m_engine, value); + + if (scarceResource) { + Q_ASSERT(ep->scarceResourcesRefCount); + rv = m_scarceConstructor->NewInstance(); + 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; +} + +v8::Handle<v8::Value> QV8VariantWrapper::Getter(v8::Local<v8::String> property, + const v8::AccessorInfo &info) +{ + return v8::Undefined(); +} + +v8::Handle<v8::Value> QV8VariantWrapper::Setter(v8::Local<v8::String> property, + v8::Local<v8::Value> value, + const v8::AccessorInfo &info) +{ + return v8::Undefined(); +} + +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::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(); +} + +QT_END_NAMESPACE |