Support read-only iteration of list properties

Eventually this should be extended to support modifying list properties.

1 files changed, 141 insertions, 0 deletions

diff --git a/src/declarative/qml/qmllistscriptclass.cpp b/src/declarative/qml/qmllistscriptclass.cpp
new file mode 100644
index 0000000..09bde8c
--- /dev/null
+++ b/src/declarative/qml/qmllistscriptclass.cpp
@@ -0,0 +1,141 @@
+/****************************************************************************
+**
+** 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 "qmllistscriptclass_p.h"
+#include <private/qmlengine_p.h>
+
+QT_BEGIN_NAMESPACE
+
+struct ListData : public QScriptDeclarativeClass::Object {
+    QGuard<QObject> object;
+    int propertyIdx;
+    QmlListScriptClass::ListType type;
+};
+
+QmlListScriptClass::QmlListScriptClass(QmlEngine *e)
+: QScriptDeclarativeClass(QmlEnginePrivate::getScriptEngine(e)), engine(e)
+{
+    QScriptEngine *scriptEngine = QmlEnginePrivate::getScriptEngine(engine);
+
+    m_lengthId = createPersistentIdentifier(QLatin1String("length"));
+}
+
+QmlListScriptClass::~QmlListScriptClass()
+{
+}
+
+QScriptValue QmlListScriptClass::newList(QObject *object, int propId, ListType type)
+{
+    QScriptEngine *scriptEngine = QmlEnginePrivate::getScriptEngine(engine);
+
+    if (!object || propId == -1)
+        return scriptEngine->nullValue();
+
+    ListData *data = new ListData;
+    data->object = object;
+    data->propertyIdx = propId;
+    data->type = type;
+
+    return newObject(scriptEngine, this, data);
+}
+
+QScriptClass::QueryFlags 
+QmlListScriptClass::queryProperty(Object *object, const Identifier &name, 
+                                  QScriptClass::QueryFlags flags)
+{
+    if (name == m_lengthId.identifier)
+        return QScriptClass::HandlesReadAccess;
+
+    bool ok = false;
+    quint32 idx = toArrayIndex(name, &ok);
+
+    if (ok) {
+        lastIndex = idx;
+        return QScriptClass::HandlesReadAccess;
+    } else {
+        return 0;
+    }
+}
+
+QScriptValue QmlListScriptClass::property(Object *obj, const Identifier &name)
+{
+    QScriptEngine *scriptEngine = QmlEnginePrivate::getScriptEngine(engine);
+    QmlEnginePrivate *enginePriv = QmlEnginePrivate::get(engine);
+
+    ListData *data = (ListData *)obj;
+    if (!data->object) 
+        return scriptEngine->undefinedValue();
+
+    void *list = 0;
+    void *args[] = { &list, 0 };
+    QMetaObject::metacall(data->object, QMetaObject::ReadProperty, 
+                          data->propertyIdx, args);
+
+    if (!list)
+        return scriptEngine->undefinedValue();
+
+    if (data->type == QListPtr) {
+        const QList<QObject *> &qlist = *((QList<QObject *>*)list);
+
+        if (name == m_lengthId.identifier) 
+            return qlist.count();
+        else if (lastIndex < qlist.count())
+            return enginePriv->objectClass->newQObject(qlist.at(lastIndex));
+        else
+            return scriptEngine->undefinedValue();
+
+    } else {
+        Q_ASSERT(data->type == QmlListPtr);
+        const QmlList<QObject *> &qmllist = *((QmlList<QObject *>*)list);
+
+        int count = qmllist.count();
+
+        if (name == m_lengthId.identifier) 
+            return count;
+        else if (lastIndex < count) 
+            return enginePriv->objectClass->newQObject(qmllist.at(lastIndex));
+        else
+            return scriptEngine->undefinedValue();
+    }
+}
+
+QT_END_NAMESPACE
+