1 files changed, 308 insertions, 0 deletions
diff --git a/src/declarative/qml/qdeclarativebinding.cpp b/src/declarative/qml/qdeclarativebinding.cpp
new file mode 100644
index 0000000000..88ca5cd643
--- /dev/null
+++ b/src/declarative/qml/qdeclarativebinding.cpp
@@ -0,0 +1,308 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qdeclarativebinding_p.h"
+#include "qdeclarativebinding_p_p.h"
+
+#include "qdeclarative.h"
+#include "qdeclarativecontext.h"
+#include "qdeclarativeinfo.h"
+#include "qdeclarativecontext_p.h"
+#include "qdeclarativedeclarativedata_p.h"
+#include "qdeclarativestringconverters_p.h"
+
+#include <qfxperf_p_p.h>
+
+#include <QVariant>
+#include <QtCore/qdebug.h>
+
+QT_BEGIN_NAMESPACE
+
+QDeclarativeBindingData::QDeclarativeBindingData()
+: updating(false), enabled(false)
+{
+}
+
+QDeclarativeBindingData::~QDeclarativeBindingData()
+{
+    removeError();
+}
+
+void QDeclarativeBindingData::refresh()
+{
+    if (enabled && !updating && q) {
+        QDeclarativeBinding *b = static_cast<QDeclarativeBinding *>(QDeclarativeExpressionPrivate::get(q));
+        b->update();
+    }
+}
+
+QDeclarativeBindingPrivate::QDeclarativeBindingPrivate()
+: QDeclarativeExpressionPrivate(new QDeclarativeBindingData)
+{
+}
+
+QDeclarativeBinding::QDeclarativeBinding(void *data, QDeclarativeRefCount *rc, QObject *obj, QDeclarativeContext *ctxt, const QString &url, int lineNumber, QObject *parent)
+: QDeclarativeExpression(ctxt, data, rc, obj, url, lineNumber, *new QDeclarativeBindingPrivate)
+{
+    setParent(parent);
+    setNotifyOnValueChanged(true);
+}
+
+QDeclarativeBinding::QDeclarativeBinding(const QString &str, QObject *obj, QDeclarativeContext *ctxt, QObject *parent)
+: QDeclarativeExpression(ctxt, str, obj, *new QDeclarativeBindingPrivate)
+{
+    setParent(parent);
+    setNotifyOnValueChanged(true);
+}
+
+QDeclarativeBinding::~QDeclarativeBinding()
+{
+}
+
+void QDeclarativeBinding::setTarget(const QDeclarativeProperty &prop)
+{
+    Q_D(QDeclarativeBinding);
+    d->bindingData()->property = prop;
+
+    update();
+}
+
+QDeclarativeProperty QDeclarativeBinding::property() const 
+{
+   Q_D(const QDeclarativeBinding);
+   return d->bindingData()->property; 
+}
+
+void QDeclarativeBinding::update(QDeclarativePropertyPrivate::WriteFlags flags)
+{
+    Q_D(QDeclarativeBinding);
+
+#ifdef Q_ENABLE_PERFORMANCE_LOG
+    QDeclarativePerfTimer<QDeclarativePerf::BindableValueUpdate> bu;
+#endif
+    QDeclarativeBindingData *data = d->bindingData();
+
+    if (!data->enabled)
+        return;
+
+    data->addref();
+
+    if (!data->updating) {
+        data->updating = true;
+
+        if (data->property.propertyType() == qMetaTypeId<QDeclarativeBinding *>()) {
+
+            int idx = data->property.index();
+            Q_ASSERT(idx != -1);
+
+
+            QDeclarativeBinding *t = this;
+            int status = -1;
+            void *a[] = { &t, 0, &status, &flags };
+            QMetaObject::metacall(data->property.object(),
+                                  QMetaObject::WriteProperty,
+                                  idx, a);
+
+        } else {
+            bool isUndefined = false;
+            QVariant value = this->value(&isUndefined);
+
+            if (isUndefined && !data->error.isValid() && data->property.isResettable()) {
+
+                data->property.reset();
+
+            } else if (isUndefined && !data->error.isValid()) {
+
+                QUrl url = QUrl(data->url);
+                int line = data->line;
+                if (url.isEmpty()) url = QUrl(QLatin1String("<Unknown File>"));
+
+                data->error.setUrl(url);
+                data->error.setLine(line);
+                data->error.setColumn(-1);
+                data->error.setDescription(QLatin1String("Unable to assign [undefined] to ") + QLatin1String(QMetaType::typeName(data->property.propertyType())));
+
+            } else if (!isUndefined && data->property.object() && 
+                       !QDeclarativePropertyPrivate::write(data->property, value, flags)) {
+
+                QUrl url = QUrl(data->url);
+                int line = data->line;
+                if (url.isEmpty()) url = QUrl(QLatin1String("<Unknown File>"));
+
+                const char *valueType = 0;
+                if (value.userType() == QVariant::Invalid) valueType = "null";
+                else valueType = QMetaType::typeName(value.userType());
+
+                data->error.setUrl(url);
+                data->error.setLine(line);
+                data->error.setColumn(-1);
+                data->error.setDescription(QLatin1String("Unable to assign ") +
+                                           QLatin1String(valueType) +
+                                           QLatin1String(" to ") +
+                                           QLatin1String(QMetaType::typeName(data->property.propertyType())));
+            }
+
+            if (data->error.isValid()) {
+                QDeclarativeEnginePrivate *p = (data->context() && data->context()->engine())?
+                    QDeclarativeEnginePrivate::get(data->context()->engine()):0;
+               if (!data->addError(p)) 
+                   qWarning().nospace() << qPrintable(this->error().toString());
+            } else {
+                data->removeError();
+            }
+        }
+
+        data->updating = false;
+    } else {
+        qmlInfo(data->property.object()) << tr("Binding loop detected for property \"%1\"").arg(data->property.name());
+    }
+
+    data->release();
+}
+
+void QDeclarativeBindingPrivate::emitValueChanged()
+{
+    Q_Q(QDeclarativeBinding);
+    q->update();
+}
+
+void QDeclarativeBinding::setEnabled(bool e, QDeclarativePropertyPrivate::WriteFlags flags)
+{
+    Q_D(QDeclarativeBinding);
+    d->bindingData()->enabled = e;
+    setNotifyOnValueChanged(e);
+
+    QDeclarativeAbstractBinding::setEnabled(e, flags);
+
+    if (e) {
+        addToObject(d->bindingData()->property.object());
+        update(flags);
+    } else {
+        removeFromObject();
+    }
+}
+
+int QDeclarativeBinding::propertyIndex()
+{
+    Q_D(QDeclarativeBinding);
+    return d->bindingData()->property.index();
+}
+
+bool QDeclarativeBinding::enabled() const
+{
+    Q_D(const QDeclarativeBinding);
+
+    return d->bindingData()->enabled;
+}
+
+QString QDeclarativeBinding::expression() const
+{
+    return QDeclarativeExpression::expression();
+}
+
+QDeclarativeAbstractBinding::QDeclarativeAbstractBinding()
+: m_object(0), m_mePtr(0), m_prevBinding(0), m_nextBinding(0)
+{
+}
+
+QDeclarativeAbstractBinding::~QDeclarativeAbstractBinding()
+{
+    removeFromObject();
+    if (m_mePtr)
+        *m_mePtr = 0;
+}
+
+void QDeclarativeAbstractBinding::destroy()
+{
+    delete this;
+}
+
+void QDeclarativeAbstractBinding::addToObject(QObject *object)
+{
+    Q_ASSERT(object);
+
+    removeFromObject();
+
+    Q_ASSERT(!m_prevBinding);
+
+    QDeclarativeDeclarativeData *data = QDeclarativeDeclarativeData::get(object, true);
+    m_nextBinding = data->bindings;
+    if (m_nextBinding) m_nextBinding->m_prevBinding = &m_nextBinding;
+    m_prevBinding = &data->bindings;
+    data->bindings = this;
+    m_object = object;
+
+    data->setBindingBit(m_object, propertyIndex());
+}
+
+void QDeclarativeAbstractBinding::removeFromObject()
+{
+    if (m_prevBinding) {
+        Q_ASSERT(m_object);
+
+        *m_prevBinding = m_nextBinding;
+        if (m_nextBinding) m_nextBinding->m_prevBinding = m_prevBinding;
+        m_prevBinding = 0;
+        m_nextBinding = 0;
+
+        QDeclarativeDeclarativeData *data = QDeclarativeDeclarativeData::get(m_object, false);
+        if (data) data->clearBindingBit(propertyIndex());
+        m_object = 0;
+    }
+}
+
+void QDeclarativeAbstractBinding::clear()
+{
+    if (m_mePtr)
+        *m_mePtr = 0;
+}
+
+QString QDeclarativeAbstractBinding::expression() const
+{
+    return QLatin1String("<Unknown>");
+}
+
+void QDeclarativeAbstractBinding::setEnabled(bool e, QDeclarativePropertyPrivate::WriteFlags)
+{
+    if (e) m_mePtr = 0;
+}
+
+QT_END_NAMESPACE