Move binding and expression classes to separate files

Change-Id: Ia9c6996a606e140f31681ecd26d93b1b0fdedf02
Reviewed-by: Roberto Raggi <roberto.raggi@nokia.com>

1 files changed, 124 insertions, 0 deletions

diff --git a/src/qml/qml/qqmlabstractexpression_p.h b/src/qml/qml/qqmlabstractexpression_p.h
new file mode 100644
index 0000000000..fe2ee1762b
--- /dev/null
+++ b/src/qml/qml/qqmlabstractexpression_p.h
@@ -0,0 +1,124 @@
+/****************************************************************************
+**
+** 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.
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QQMLABSTRACTEXPRESSION_P_H
+#define QQMLABSTRACTEXPRESSION_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <private/qqmlcontext_p.h>
+#include <private/qfieldlist_p.h>
+#include <private/qflagpointer_p.h>
+
+QT_BEGIN_NAMESPACE
+
+class QQmlAbstractExpression
+{
+public:
+    QQmlAbstractExpression();
+    virtual ~QQmlAbstractExpression();
+
+    bool isValid() const;
+
+    QQmlContextData *context() const;
+    void setContext(QQmlContextData *);
+
+    virtual void refresh();
+
+    class DeleteWatcher {
+    public:
+        inline DeleteWatcher(QQmlAbstractExpression *);
+        inline ~DeleteWatcher();
+        inline bool wasDeleted() const;
+    private:
+        friend class QQmlAbstractExpression;
+        QQmlContextData *_c;
+        QQmlAbstractExpression **_w;
+        QQmlAbstractExpression *_s;
+    };
+
+private:
+    friend class QQmlContext;
+    friend class QQmlContextData;
+    friend class QQmlContextPrivate;
+
+    QBiPointer<QQmlContextData, DeleteWatcher> m_context;
+    QQmlAbstractExpression **m_prevExpression;
+    QQmlAbstractExpression  *m_nextExpression;
+};
+
+QQmlAbstractExpression::DeleteWatcher::DeleteWatcher(QQmlAbstractExpression *e)
+: _c(0), _w(0), _s(e)
+{
+    if (e->m_context.isT1()) {
+        _w = &_s;
+        _c = e->m_context.asT1();
+        e->m_context = this;
+    } else {
+        // Another watcher is already registered
+        _w = &e->m_context.asT2()->_s;
+    }
+}
+
+QQmlAbstractExpression::DeleteWatcher::~DeleteWatcher()
+{
+    Q_ASSERT(*_w == 0 || (*_w == _s && _s->m_context.isT2()));
+    if (*_w && _s->m_context.asT2() == this)
+        _s->m_context = _c;
+}
+
+bool QQmlAbstractExpression::DeleteWatcher::wasDeleted() const
+{
+    return *_w == 0;
+}
+
+QT_END_NAMESPACE
+
+#endif // QQMLABSTRACTEXPRESSION_P_H