Initial V8 integration

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