1 files changed, 289 insertions, 0 deletions
diff --git a/src/declarative/qml/v8/qv8valuetypewrapper.cpp b/src/declarative/qml/v8/qv8valuetypewrapper.cpp
new file mode 100644
index 0000000000..6dfb4312bc
--- /dev/null
+++ b/src/declarative/qml/v8/qv8valuetypewrapper.cpp
@@ -0,0 +1,289 @@
+/****************************************************************************
+**
+** 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 "qv8valuetypewrapper_p.h"
+#include "qv8engine_p.h"
+
+#include <private/qdeclarativevaluetype_p.h>
+#include <private/qdeclarativebinding_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;
+    QDeclarativeValueType *type;
+};
+
+class QV8ValueTypeReferenceResource : public QV8ValueTypeResource
+{
+public:
+    QV8ValueTypeReferenceResource(QV8Engine *engine);
+
+    QDeclarativeGuard<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()
+{
+    m_constructor.Dispose();
+}
+
+void QV8ValueTypeWrapper::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());
+}
+
+v8::Local<v8::Object> QV8ValueTypeWrapper::newValueType(QObject *object, int property, QDeclarativeValueType *type)
+{
+    // XXX aakenned - NewInstance() is slow for our case
+    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, QDeclarativeValueType *type)
+{
+    // XXX aakenned - NewInstance() is slow for our case
+    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;
+}
+
+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) {
+            reference->type->read(reference->object, reference->property);
+            return reference->type->value();
+        } else {
+            return QVariant();
+        }
+
+    } else {
+        Q_ASSERT(resource->objectType == QV8ValueTypeResource::Copy);
+
+        QV8ValueTypeCopyResource *copy = static_cast<QV8ValueTypeCopyResource *>(resource);
+
+        return copy->value;
+    }
+}
+
+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::Undefined();
+
+    // XXX aakenned - this is horribly inefficient.  People seem to have taken a
+    // liking to value type properties, so we should probably try and optimize it
+    // a little.
+
+    QByteArray propName = r->engine->toString(property).toUtf8();
+    int index = r->type->metaObject()->indexOfProperty(propName.constData());
+    if (index == -1)
+        return v8::Undefined();
+
+    if (r->objectType == QV8ValueTypeResource::Reference) {
+        QV8ValueTypeReferenceResource *reference = static_cast<QV8ValueTypeReferenceResource *>(r);
+
+        if (!reference->object)
+            return v8::Undefined();
+
+        r->type->read(reference->object, reference->property);
+    } else {
+        Q_ASSERT(r->objectType == QV8ValueTypeResource::Copy);
+
+        QV8ValueTypeCopyResource *copy = static_cast<QV8ValueTypeCopyResource *>(r);
+
+        r->type->setValue(copy->value);
+    }
+
+    QMetaProperty prop = r->type->metaObject()->property(index);
+    QVariant result = prop.read(r->type);
+
+    return r->engine->fromVariant(result);
+}
+
+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();
+    int index = r->type->metaObject()->indexOfProperty(propName.constData());
+    if (index == -1)
+        return value;
+
+    if (r->objectType == QV8ValueTypeResource::Reference) {
+        QV8ValueTypeReferenceResource *reference = static_cast<QV8ValueTypeReferenceResource *>(r);
+
+        if (!reference->object || 
+            !reference->object->metaObject()->property(reference->property).isWritable())
+            return value;
+
+        r->type->read(reference->object, reference->property);
+        QMetaProperty p = r->type->metaObject()->property(index);
+
+        QDeclarativeBinding *newBinding = 0;
+
+        if (value->IsFunction()) {
+            QDeclarativeContextData *context = r->engine->callingContext();
+            v8::Handle<v8::Function> function = v8::Handle<v8::Function>::Cast(value);
+
+            QDeclarativePropertyCache::Data cacheData;
+            cacheData.flags = QDeclarativePropertyCache::Data::IsWritable;
+            cacheData.propType = reference->object->metaObject()->property(reference->property).userType();
+            cacheData.coreIndex = reference->property;
+
+            QDeclarativePropertyCache::ValueTypeData valueTypeData;
+            valueTypeData.valueTypeCoreIdx = index;
+            valueTypeData.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();
+            QString url = r->engine->toString(frame->GetScriptName());
+
+            newBinding = new QDeclarativeBinding(&function, reference->object, context);
+            newBinding->setSourceLocation(url, lineNumber);
+            newBinding->setTarget(QDeclarativePropertyPrivate::restore(cacheData, valueTypeData, 
+                                                                       reference->object, context));
+            newBinding->setEvaluateFlags(newBinding->evaluateFlags() | QDeclarativeBinding::RequiresThisObject);
+        }
+
+        QDeclarativeAbstractBinding *oldBinding = 
+            QDeclarativePropertyPrivate::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);
+
+            reference->type->write(reference->object, reference->property, 0);
+        }
+
+    } else {
+        Q_ASSERT(r->objectType == QV8ValueTypeResource::Copy);
+
+        QV8ValueTypeCopyResource *copy = static_cast<QV8ValueTypeCopyResource *>(r);
+
+        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