diff options
Diffstat (limited to 'src/qml/qml/v8/qv8typewrapper.cpp')
| -rw-r--r-- | src/qml/qml/v8/qv8typewrapper.cpp | 314 |
1 files changed, 314 insertions, 0 deletions
diff --git a/src/qml/qml/v8/qv8typewrapper.cpp b/src/qml/qml/v8/qv8typewrapper.cpp new file mode 100644 index 0000000000..dbf369e678 --- /dev/null +++ b/src/qml/qml/v8/qv8typewrapper.cpp @@ -0,0 +1,314 @@ +/**************************************************************************** +** +** 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 "qv8contextwrapper_p.h" +#include "qv8engine_p.h" + +#include <private/qqmlengine_p.h> +#include <private/qqmlcontext_p.h> + +#include <private/qjsvalue_p.h> +#include <private/qscript_impl_p.h> + +QT_BEGIN_NAMESPACE + +class QV8TypeResource : public QV8ObjectResource +{ + V8_RESOURCE_TYPE(TypeType); + +public: + QV8TypeResource(QV8Engine *engine); + virtual ~QV8TypeResource(); + + QV8TypeWrapper::TypeNameMode mode; + + QQmlGuard<QObject> object; + + QQmlType *type; + QQmlTypeNameCache *typeNamespace; + const void *importNamespace; +}; + +QV8TypeResource::QV8TypeResource(QV8Engine *engine) +: QV8ObjectResource(engine), mode(QV8TypeWrapper::IncludeEnums), type(0), typeNamespace(0), importNamespace(0) +{ +} + +QV8TypeResource::~QV8TypeResource() +{ + if (typeNamespace) typeNamespace->release(); +} + +QV8TypeWrapper::QV8TypeWrapper() +: m_engine(0) +{ +} + +QV8TypeWrapper::~QV8TypeWrapper() +{ +} + +void QV8TypeWrapper::destroy() +{ + qPersistentDispose(m_constructor); +} + +void QV8TypeWrapper::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 = qPersistentNew<v8::Function>(ft->GetFunction()); +} + +// Returns a type wrapper for type t on o. This allows access of enums, and attached properties. +v8::Local<v8::Object> QV8TypeWrapper::newObject(QObject *o, QQmlType *t, TypeNameMode mode) +{ + Q_ASSERT(t); + // XXX NewInstance() should be optimized + v8::Local<v8::Object> rv = m_constructor->NewInstance(); + QV8TypeResource *r = new QV8TypeResource(m_engine); + r->mode = mode; r->object = o; r->type = t; + rv->SetExternalResource(r); + return rv; +} + +// Returns a type wrapper for importNamespace (of t) on o. This allows nested resolution of a type in a +// namespace. +v8::Local<v8::Object> QV8TypeWrapper::newObject(QObject *o, QQmlTypeNameCache *t, + const void *importNamespace, TypeNameMode mode) +{ + Q_ASSERT(t); + Q_ASSERT(importNamespace); + // XXX NewInstance() should be optimized + v8::Local<v8::Object> rv = m_constructor->NewInstance(); + QV8TypeResource *r = new QV8TypeResource(m_engine); + t->addref(); + r->mode = mode; r->object = o; r->typeNamespace = t; r->importNamespace = importNamespace; + rv->SetExternalResource(r); + return rv; +} + +QVariant QV8TypeWrapper::toVariant(QV8ObjectResource *r) +{ + Q_ASSERT(r->resourceType() == QV8ObjectResource::TypeType); + QV8TypeResource *resource = static_cast<QV8TypeResource *>(r); + QV8Engine *v8engine = resource->engine; + + if (resource->typeNamespace) { + if (QQmlMetaType::ModuleApiInstance *moduleApi = resource->typeNamespace->moduleApi(resource->importNamespace)) { + if (moduleApi->scriptCallback) { + moduleApi->scriptApi = moduleApi->scriptCallback(v8engine->engine(), v8engine->engine()); + moduleApi->scriptCallback = 0; + moduleApi->qobjectCallback = 0; + } else if (moduleApi->qobjectCallback) { + moduleApi->qobjectApi = moduleApi->qobjectCallback(v8engine->engine(), v8engine->engine()); + moduleApi->scriptCallback = 0; + moduleApi->qobjectCallback = 0; + } + + if (moduleApi->qobjectApi) { + return QVariant::fromValue<QObject*>(moduleApi->qobjectApi); + } + } + } + + // only QObject Module API can be converted to a variant. + return QVariant(); +} + +v8::Handle<v8::Value> QV8TypeWrapper::Getter(v8::Local<v8::String> property, + const v8::AccessorInfo &info) +{ + QV8TypeResource *resource = v8_resource_cast<QV8TypeResource>(info.This()); + + if (!resource) + return v8::Undefined(); + + QV8Engine *v8engine = resource->engine; + QObject *object = resource->object; + + QHashedV8String propertystring(property); + + if (resource->type) { + QQmlType *type = resource->type; + + if (QV8Engine::startsWithUpper(property)) { + int value = type->enumValue(propertystring); + if (-1 != value) + return v8::Integer::New(value); + + // Fall through to return empty handle + + } else if (resource->object) { + QObject *ao = qmlAttachedPropertiesObjectById(type->attachedPropertiesId(), object); + if (ao) + return v8engine->qobjectWrapper()->getProperty(ao, propertystring, + QV8QObjectWrapper::IgnoreRevision); + + // Fall through to return empty handle + } + + // Fall through to return empty handle + + } else if (resource->typeNamespace) { + Q_ASSERT(resource->importNamespace); + QQmlTypeNameCache::Result r = resource->typeNamespace->query(propertystring, + resource->importNamespace); + + if (r.isValid()) { + if (r.type) { + return v8engine->typeWrapper()->newObject(object, r.type, resource->mode); + } else if (r.scriptIndex != -1) { + int index = r.scriptIndex; + QQmlContextData *context = v8engine->callingContext(); + if (index < context->importedScripts.count()) + return context->importedScripts.at(index); + } + + return v8::Undefined(); + } else if (QQmlMetaType::ModuleApiInstance *moduleApi = resource->typeNamespace->moduleApi(resource->importNamespace)) { + + if (moduleApi->scriptCallback) { + moduleApi->scriptApi = moduleApi->scriptCallback(v8engine->engine(), v8engine->engine()); + moduleApi->scriptCallback = 0; + moduleApi->qobjectCallback = 0; + } else if (moduleApi->qobjectCallback) { + moduleApi->qobjectApi = moduleApi->qobjectCallback(v8engine->engine(), v8engine->engine()); + moduleApi->scriptCallback = 0; + moduleApi->qobjectCallback = 0; + } + + if (moduleApi->qobjectApi) { + // check for enum value + if (QV8Engine::startsWithUpper(property)) { + if (resource->mode == IncludeEnums) { + QString name = v8engine->toString(property); + + // ### Optimize + QByteArray enumName = name.toUtf8(); + const QMetaObject *metaObject = moduleApi->qobjectApi->metaObject(); + for (int ii = metaObject->enumeratorCount() - 1; ii >= 0; --ii) { + QMetaEnum e = metaObject->enumerator(ii); + bool ok; + int value = e.keyToValue(enumName.constData(), &ok); + if (ok) + return v8::Integer::New(value); + } + } + } + + // check for property. + v8::Handle<v8::Value> rv = v8engine->qobjectWrapper()->getProperty(moduleApi->qobjectApi, propertystring, QV8QObjectWrapper::IgnoreRevision); + return rv; + } else if (!moduleApi->scriptApi.isUndefined()) { + // NOTE: if used in a binding, changes will not trigger re-evaluation since non-NOTIFYable. + QJSValuePrivate *apiprivate = QJSValuePrivate::get(moduleApi->scriptApi); + QScopedPointer<QJSValuePrivate> propertyValue(apiprivate->property(property).give()); + return propertyValue->asV8Value(v8engine); + } else { + return v8::Handle<v8::Value>(); + } + } + + // Fall through to return empty handle + + } else { + Q_ASSERT(!"Unreachable"); + } + + return v8::Handle<v8::Value>(); +} + +v8::Handle<v8::Value> QV8TypeWrapper::Setter(v8::Local<v8::String> property, + v8::Local<v8::Value> value, + const v8::AccessorInfo &info) +{ + QV8TypeResource *resource = v8_resource_cast<QV8TypeResource>(info.This()); + + if (!resource) + return value; + + QV8Engine *v8engine = resource->engine; + + QHashedV8String propertystring(property); + + if (resource->type && resource->object) { + QQmlType *type = resource->type; + QObject *object = resource->object; + QObject *ao = qmlAttachedPropertiesObjectById(type->attachedPropertiesId(), object); + if (ao) + v8engine->qobjectWrapper()->setProperty(ao, propertystring, value, + QV8QObjectWrapper::IgnoreRevision); + } else if (resource->typeNamespace) { + if (QQmlMetaType::ModuleApiInstance *moduleApi = resource->typeNamespace->moduleApi(resource->importNamespace)) { + if (moduleApi->scriptCallback) { + moduleApi->scriptApi = moduleApi->scriptCallback(v8engine->engine(), v8engine->engine()); + moduleApi->scriptCallback = 0; + moduleApi->qobjectCallback = 0; + } else if (moduleApi->qobjectCallback) { + moduleApi->qobjectApi = moduleApi->qobjectCallback(v8engine->engine(), v8engine->engine()); + moduleApi->scriptCallback = 0; + moduleApi->qobjectCallback = 0; + } + + if (moduleApi->qobjectApi) { + v8engine->qobjectWrapper()->setProperty(moduleApi->qobjectApi, propertystring, value, + QV8QObjectWrapper::IgnoreRevision); + } else if (!moduleApi->scriptApi.isUndefined()) { + QScopedPointer<QJSValuePrivate> setvalp(new QJSValuePrivate(v8engine, value)); + QJSValuePrivate *apiprivate = QJSValuePrivate::get(moduleApi->scriptApi); + if (apiprivate->propertyFlags(property) & QJSValuePrivate::ReadOnly) { + QString error = QLatin1String("Cannot assign to read-only property \"") + + v8engine->toString(property) + QLatin1Char('\"'); + v8::ThrowException(v8::Exception::Error(v8engine->toString(error))); + } else { + apiprivate->setProperty(property, setvalp.data()); + } + } + } + } + + return value; +} + +QT_END_NAMESPACE |