Move model types into their own library

The model types are not part of the core QML runtime and should only be
loaded if you explicitly import them. We cannot enforce that in Qt5 as
some of them are available from the QtQml import, but we can change it
in Qt6.

Change-Id: I1e49e84d748e352537ec2d4af901c034c91d038f
Reviewed-by: Erik Verbruggen <erik.verbruggen@me.com>

1 files changed, 198 insertions, 0 deletions

diff --git a/src/qmlmodels/qquickpackage.cpp b/src/qmlmodels/qquickpackage.cpp
new file mode 100644
index 0000000000..03539d8737
--- /dev/null
+++ b/src/qmlmodels/qquickpackage.cpp
@@ -0,0 +1,198 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtQml module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qquickpackage_p.h"
+
+#include <private/qobject_p.h>
+#include <private/qqmlguard_p.h>
+
+QT_BEGIN_NAMESPACE
+
+/*!
+    \qmltype Package
+    \instantiates QQuickPackage
+    \inqmlmodule QtQuick
+    \ingroup qtquick-views
+    \brief Specifies a collection of named items.
+
+    The Package type is used in conjunction with
+    DelegateModel to enable delegates with a shared context
+    to be provided to multiple views.
+
+    Any item within a Package may be assigned a name via the
+    \l{Package::name}{Package.name} attached property.
+
+    The example below creates a Package containing two named items;
+    \e list and \e grid.  The third item in the package (the \l Rectangle) is parented to whichever
+    delegate it should appear in.  This allows an item to move
+    between views.
+
+    \snippet package/Delegate.qml 0
+
+    These named items are used as the delegates by the two views who
+    reference the special \l{DelegateModel::parts} property to select
+    a model which provides the chosen delegate.
+
+    \snippet package/view.qml 0
+
+    \sa {Qt Quick Examples - Views}, {Qt Quick Demo - Photo Viewer}, {Qt QML}
+*/
+
+/*!
+    \qmlattachedproperty string QtQuick::Package::name
+    This attached property holds the name of an item within a Package.
+*/
+
+
+class QQuickPackagePrivate : public QObjectPrivate
+{
+public:
+    QQuickPackagePrivate() {}
+
+    struct DataGuard : public QQmlGuard<QObject>
+    {
+        DataGuard(QObject *obj, QList<DataGuard> *l) : list(l) { (QQmlGuard<QObject>&)*this = obj; }
+        QList<DataGuard> *list;
+        void objectDestroyed(QObject *) override {
+            // we assume priv will always be destroyed after objectDestroyed calls
+            list->removeOne(*this);
+        }
+    };
+
+    QList<DataGuard> dataList;
+    static void data_append(QQmlListProperty<QObject> *prop, QObject *o) {
+        QList<DataGuard> *list = static_cast<QList<DataGuard> *>(prop->data);
+        list->append(DataGuard(o, list));
+    }
+    static void data_clear(QQmlListProperty<QObject> *prop) {
+        QList<DataGuard> *list = static_cast<QList<DataGuard> *>(prop->data);
+        list->clear();
+    }
+    static QObject *data_at(QQmlListProperty<QObject> *prop, int index) {
+        QList<DataGuard> *list = static_cast<QList<DataGuard> *>(prop->data);
+        return list->at(index);
+    }
+    static int data_count(QQmlListProperty<QObject> *prop) {
+        QList<DataGuard> *list = static_cast<QList<DataGuard> *>(prop->data);
+        return list->count();
+    }
+};
+
+QHash<QObject *, QQuickPackageAttached *> QQuickPackageAttached::attached;
+
+QQuickPackageAttached::QQuickPackageAttached(QObject *parent)
+: QObject(parent)
+{
+    attached.insert(parent, this);
+}
+
+QQuickPackageAttached::~QQuickPackageAttached()
+{
+    attached.remove(parent());
+}
+
+QString QQuickPackageAttached::name() const
+{
+    return _name;
+}
+
+void QQuickPackageAttached::setName(const QString &n)
+{
+    _name = n;
+}
+
+QQuickPackage::QQuickPackage(QObject *parent)
+    : QObject(*(new QQuickPackagePrivate), parent)
+{
+}
+
+QQuickPackage::~QQuickPackage()
+{
+}
+
+QQmlListProperty<QObject> QQuickPackage::data()
+{
+    Q_D(QQuickPackage);
+    return QQmlListProperty<QObject>(this, &d->dataList, QQuickPackagePrivate::data_append,
+                                                        QQuickPackagePrivate::data_count,
+                                                        QQuickPackagePrivate::data_at,
+                                                        QQuickPackagePrivate::data_clear);
+}
+
+bool QQuickPackage::hasPart(const QString &name)
+{
+    Q_D(QQuickPackage);
+    for (int ii = 0; ii < d->dataList.count(); ++ii) {
+        QObject *obj = d->dataList.at(ii);
+        QQuickPackageAttached *a = QQuickPackageAttached::attached.value(obj);
+        if (a && a->name() == name)
+            return true;
+    }
+    return false;
+}
+
+QObject *QQuickPackage::part(const QString &name)
+{
+    Q_D(QQuickPackage);
+    if (name.isEmpty() && !d->dataList.isEmpty())
+        return d->dataList.at(0);
+
+    for (int ii = 0; ii < d->dataList.count(); ++ii) {
+        QObject *obj = d->dataList.at(ii);
+        QQuickPackageAttached *a = QQuickPackageAttached::attached.value(obj);
+        if (a && a->name() == name)
+            return obj;
+    }
+
+    if (name == QLatin1String("default") && !d->dataList.isEmpty())
+        return d->dataList.at(0);
+
+    return nullptr;
+}
+
+QQuickPackageAttached *QQuickPackage::qmlAttachedProperties(QObject *o)
+{
+    return new QQuickPackageAttached(o);
+}
+
+
+
+QT_END_NAMESPACE
+
+#include "moc_qquickpackage_p.cpp"