Improve script lookup caching

1 files changed, 283 insertions, 0 deletions

diff --git a/src/declarative/qml/qmlobjectscriptclass.cpp b/src/declarative/qml/qmlobjectscriptclass.cpp
new file mode 100644
index 0000000..0ae1809
--- /dev/null
+++ b/src/declarative/qml/qmlobjectscriptclass.cpp
@@ -0,0 +1,283 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, 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.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qmlobjectscriptclass_p.h"
+#include <private/qmlengine_p.h>
+#include <private/qguard_p.h>
+#include <private/qmldeclarativedata_p.h>
+
+QT_BEGIN_NAMESPACE
+
+struct ObjectData {
+    ObjectData(QObject *o) : object(o) {}
+    QGuard<QObject> object;
+};
+
+static QScriptValue QmlObjectToString(QScriptContext *context, QScriptEngine *engine)
+{
+    QObject* obj = context->thisObject().data().toQObject();
+    QString ret = QLatin1String("Qml Object, ");
+    if(obj){
+        //###Should this be designer or developer details? Dev for now.
+        //TODO: Can we print the id too?
+        ret += QLatin1String("\"");
+        ret += obj->objectName();
+        ret += QLatin1String("\" ");
+        ret += QLatin1String(obj->metaObject()->className());
+        ret += QLatin1String("(0x");
+        ret += QString::number((quintptr)obj,16);
+        ret += QLatin1String(")");
+    }else{
+        ret += QLatin1String("null");
+    }
+    return engine->newVariant(ret);
+}
+
+static QScriptValue QmlObjectDestroy(QScriptContext *context, QScriptEngine *engine)
+{
+    QObject* obj = context->thisObject().toQObject();
+    if(obj){
+        int delay = 0;
+        if(context->argumentCount() > 0)
+            delay = context->argument(0).toInt32();
+        obj->deleteLater();
+        //### Should this be delayed as well?
+        context->thisObject().setData(QScriptValue(engine, 0));
+    }
+    return engine->nullValue();
+}
+
+/*
+    The QmlObjectScriptClass handles property access for QObjects
+    via QtScript. It is also used to provide a more useful API in
+    QtScript for QML.
+ */
+QmlObjectScriptClass::QmlObjectScriptClass(QmlEngine *bindEngine)
+: QScriptDeclarativeClass(QmlEnginePrivate::getScriptEngine(bindEngine)), lastData(0),
+  engine(bindEngine)
+{
+    engine = bindEngine;
+    QScriptEngine *scriptEngine = QmlEnginePrivate::getScriptEngine(bindEngine);
+
+    m_destroy = scriptEngine->newFunction(QmlObjectDestroy);
+    m_destroyId = createPersistentIdentifier<Dummy>(QLatin1String("destroy"));
+}
+
+QmlObjectScriptClass::~QmlObjectScriptClass()
+{
+    delete m_destroyId;
+}
+
+QScriptValue QmlObjectScriptClass::newQObject(QObject *object) 
+{
+    QScriptEngine *scriptEngine = QmlEnginePrivate::getScriptEngine(engine);
+
+    return newObject(scriptEngine, this, (Object)new ObjectData(object));
+}
+
+QObject *QmlObjectScriptClass::toQObject(const QScriptValue &value) const
+{
+    return value.toQObject();
+}
+
+QScriptClass::QueryFlags 
+QmlObjectScriptClass::queryProperty(const Object &object, const Identifier &name, 
+                                    QScriptClass::QueryFlags flags)
+{
+    return queryProperty(toQObject(object), name, flags);
+}
+
+QScriptClass::QueryFlags 
+QmlObjectScriptClass::queryProperty(QObject *obj, const Identifier &name, 
+                                    QScriptClass::QueryFlags flags)
+{
+    Q_UNUSED(flags);
+    lastData = 0;
+
+    if (name == m_destroyId->identifier)
+        return QScriptClass::HandlesReadAccess;
+
+    if (!obj)
+        return 0;
+
+    QmlEnginePrivate *enginePrivate = QmlEnginePrivate::get(engine);
+    QmlPropertyCache *cache = 0;
+    QmlDeclarativeData *ddata = QmlDeclarativeData::get(obj);
+    if (ddata)
+        cache = ddata->propertyCache;
+    if (!cache) {
+        cache = enginePrivate->cache(obj);
+        if (ddata) { cache->addref(); ddata->propertyCache = cache; }
+    }
+
+    if (cache) {
+        QmlPropertyCache::Data *property = cache->property(name);
+        if (!property) return 0;
+
+        if (flags == QScriptClass::HandlesReadAccess) {
+            lastData = property;
+            return QScriptClass::HandlesReadAccess;
+        } else if (property->propType > 0 && property->propType < QVariant::UserType) {
+            lastData = property;
+            return flags;
+        }
+    }
+
+    // Fallback
+    return QmlEnginePrivate::get(engine)->queryObject(toString(name), &m_id, obj);
+}
+
+QScriptValue QmlObjectScriptClass::property(const Object &object, const Identifier &name)
+{
+    return property(toQObject(object), name);
+}
+
+QScriptValue QmlObjectScriptClass::property(QObject *obj, const Identifier &name)
+{
+    if (name == m_destroyId->identifier)
+        return m_destroy;
+
+    QScriptEngine *scriptEngine = QmlEnginePrivate::getScriptEngine(engine);
+    QmlEnginePrivate *enginePriv = QmlEnginePrivate::get(engine);
+
+    if (!obj) {
+        return QScriptValue();
+    } else if (lastData) {
+
+        if (lastData->flags & QmlPropertyCache::Data::IsFunction) {
+            // ### Optimize
+            QScriptValue sobj = scriptEngine->newQObject(obj);
+            return sobj.property(toString(name));
+        } else {
+            QVariant var = obj->metaObject()->property(lastData->coreIndex).read(obj);
+            if (!(lastData->flags & QmlPropertyCache::Data::IsConstant)) {
+                enginePriv->capturedProperties << 
+                    QmlEnginePrivate::CapturedProperty(obj, lastData->coreIndex, 
+                                                       lastData->notifyIndex);
+            }
+
+            if (lastData->flags & QmlPropertyCache::Data::IsQObjectDerived) {
+                QObject *rv = *(QObject **)var.constData();
+                return newQObject(rv);
+            } else {
+                return qScriptValueFromValue(scriptEngine, var);
+            }
+        }
+
+    } else {
+        return QmlEnginePrivate::get(engine)->propertyObject(toString(name), obj, m_id);
+    }
+}
+
+void QmlObjectScriptClass::setProperty(const Object &object, 
+                                       const Identifier &name, 
+                                       const QScriptValue &value)
+{
+    return setProperty(toQObject(object), name, value);
+}
+
+void QmlObjectScriptClass::setProperty(QObject *obj, 
+                                       const Identifier &name, 
+                                       const QScriptValue &value)
+{
+    Q_UNUSED(name);
+    Q_UNUSED(object);
+
+    QScriptEngine *scriptEngine = QmlEnginePrivate::getScriptEngine(engine);
+    QmlEnginePrivate *enginePriv = QmlEnginePrivate::get(engine);
+
+    if (!obj) {
+        return;
+    } else if (lastData) {
+        switch (lastData->propType) {
+        case 1:
+            {
+                bool b = value.toBoolean();
+                void *a[1];
+                a[0] = &b;
+                QMetaObject::metacall(obj, QMetaObject::WriteProperty, lastData->coreIndex, a);
+            }
+            break;
+
+        case 2:
+            {
+                int b = value.toInteger();
+                void *a[1];
+                a[0] = &b;
+                QMetaObject::metacall(obj, QMetaObject::WriteProperty, lastData->coreIndex, a);
+            }
+            break;
+
+        case 6:
+            {
+                double b = value.toNumber();
+                void *a[1];
+                a[0] = &b;
+                QMetaObject::metacall(obj, QMetaObject::WriteProperty, lastData->coreIndex, a);
+            }
+            break;
+
+        default:
+            {
+                QMetaProperty p = obj->metaObject()->property(lastData->coreIndex);
+                p.write(obj, value.toVariant());
+            }
+        }
+    } else {
+        QmlEnginePrivate::get(engine)->setPropertyObject(value, m_id);
+    }
+}
+
+QObject *QmlObjectScriptClass::toQObject(const Object &object, bool *ok)
+{
+    if (ok) *ok = true;
+
+    ObjectData *data = (ObjectData*)object;
+    return data->object.data();
+}
+
+void QmlObjectScriptClass::destroyed(const Object &object)
+{
+    ObjectData *data = (ObjectData*)object;
+    delete data;
+}
+
+QT_END_NAMESPACE