1 files changed, 305 insertions, 0 deletions
diff --git a/src/qml/qml/qqmlboundsignal.cpp b/src/qml/qml/qqmlboundsignal.cpp
new file mode 100644
index 0000000000..ca6b13e7f8
--- /dev/null
+++ b/src/qml/qml/qqmlboundsignal.cpp
@@ -0,0 +1,305 @@
+/****************************************************************************
+**
+** 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.
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qqmlboundsignal_p.h"
+
+#include <private/qmetaobjectbuilder_p.h>
+#include "qqmlengine_p.h"
+#include "qqmlexpression_p.h"
+#include "qqmlcontext_p.h"
+#include "qqmlmetatype_p.h"
+#include "qqml.h"
+#include "qqmlcontext.h"
+#include "qqmlglobal_p.h"
+#include <private/qqmlprofilerservice_p.h>
+#include <private/qv8debugservice_p.h>
+
+#include <QtCore/qstringbuilder.h>
+#include <QtCore/qdebug.h>
+
+QT_BEGIN_NAMESPACE
+
+class QQmlBoundSignalParameters : public QObject
+{
+Q_OBJECT
+public:
+    QQmlBoundSignalParameters(const QMetaMethod &, QObject * = 0);
+    ~QQmlBoundSignalParameters();
+
+    void setValues(void **);
+    void clearValues();
+
+private:
+    friend class MetaObject;
+    int metaCall(QMetaObject::Call, int _id, void **);
+    struct MetaObject : public QAbstractDynamicMetaObject {
+        MetaObject(QQmlBoundSignalParameters *b)
+            : parent(b) {}
+
+        int metaCall(QMetaObject::Call c, int id, void **a) { 
+            return parent->metaCall(c, id, a);
+        }
+        QQmlBoundSignalParameters *parent;
+    };
+
+    int *types;
+    void **values;
+    QMetaObject *myMetaObject;
+};
+
+static int evaluateIdx = -1;
+
+QQmlAbstractBoundSignal::QQmlAbstractBoundSignal(QObject *parent)
+: QObject(parent)
+{
+}
+
+QQmlAbstractBoundSignal::~QQmlAbstractBoundSignal()
+{
+}
+
+QQmlBoundSignal::QQmlBoundSignal(QObject *scope, const QMetaMethod &signal, 
+                               QObject *parent)
+: m_expression(0), m_signal(signal), m_paramsValid(false), m_isEvaluating(false), m_params(0)
+{
+    // This is thread safe.  Although it may be updated by two threads, they
+    // will both set it to the same value - so the worst thing that can happen
+    // is that they both do the work to figure it out.  Boo hoo.
+    if (evaluateIdx == -1) evaluateIdx = metaObject()->methodCount();
+
+    QQml_setParent_noEvent(this, parent);
+    QQmlPropertyPrivate::connect(scope, m_signal.methodIndex(), this, evaluateIdx);
+}
+
+QQmlBoundSignal::QQmlBoundSignal(QQmlContext *ctxt, const QString &val, 
+                               QObject *scope, const QMetaMethod &signal,
+                               QObject *parent)
+: m_expression(0), m_signal(signal), m_paramsValid(false), m_isEvaluating(false), m_params(0)
+{
+    // This is thread safe.  Although it may be updated by two threads, they
+    // will both set it to the same value - so the worst thing that can happen
+    // is that they both do the work to figure it out.  Boo hoo.
+    if (evaluateIdx == -1) evaluateIdx = metaObject()->methodCount();
+
+    QQml_setParent_noEvent(this, parent);
+    QQmlPropertyPrivate::connect(scope, m_signal.methodIndex(), this, evaluateIdx);
+
+    m_expression = new QQmlExpression(ctxt, scope, val);
+}
+
+QQmlBoundSignal::~QQmlBoundSignal()
+{
+    delete m_expression;
+    m_expression = 0;
+}
+
+int QQmlBoundSignal::index() const 
+{ 
+    return m_signal.methodIndex();
+}
+
+/*!
+    Returns the signal expression.
+*/
+QQmlExpression *QQmlBoundSignal::expression() const
+{
+    return m_expression;
+}
+
+/*!
+    Sets the signal expression to \a e.  Returns the current signal expression,
+    or null if there is no signal expression.
+
+    The QQmlBoundSignal instance takes ownership of \a e.  The caller is 
+    assumes ownership of the returned QQmlExpression.
+*/
+QQmlExpression *QQmlBoundSignal::setExpression(QQmlExpression *e)
+{
+    QQmlExpression *rv = m_expression;
+    m_expression = e;
+    if (m_expression) m_expression->setNotifyOnValueChanged(false);
+    return rv;
+}
+
+QQmlBoundSignal *QQmlBoundSignal::cast(QObject *o)
+{
+    QQmlAbstractBoundSignal *s = qobject_cast<QQmlAbstractBoundSignal*>(o);
+    return static_cast<QQmlBoundSignal *>(s);
+}
+
+int QQmlBoundSignal::qt_metacall(QMetaObject::Call c, int id, void **a)
+{
+    if (c == QMetaObject::InvokeMetaMethod && id == evaluateIdx) {
+        if (!m_expression)
+            return -1;
+
+        if (QQmlDebugService::isDebuggingEnabled())
+            QV8DebugService::instance()->signalEmitted(QString::fromAscii(m_signal.signature()));
+
+        QQmlHandlingSignalProfiler prof;
+        if (prof.enabled) {
+            prof.setSignalInfo(QString::fromLatin1(m_signal.signature()),
+                               m_expression->expression());
+            prof.setLocation(m_expression->sourceFile(), m_expression->lineNumber(),
+                             m_expression->columnNumber());
+        }
+
+        m_isEvaluating = true;
+        if (!m_paramsValid) {
+            if (!m_signal.parameterTypes().isEmpty())
+                m_params = new QQmlBoundSignalParameters(m_signal, this);
+            m_paramsValid = true;
+        }
+
+        if (m_params) m_params->setValues(a);
+        if (m_expression && m_expression->engine()) {
+            QQmlExpressionPrivate::get(m_expression)->value(m_params);
+            if (m_expression && m_expression->hasError())
+                QQmlEnginePrivate::warning(m_expression->engine(), m_expression->error());
+        }
+        if (m_params) m_params->clearValues();
+        m_isEvaluating = false;
+        return -1;
+    } else {
+        return QObject::qt_metacall(c, id, a);
+    }
+}
+
+QQmlBoundSignalParameters::QQmlBoundSignalParameters(const QMetaMethod &method, 
+                                                                     QObject *parent)
+: QObject(parent), types(0), values(0)
+{
+    MetaObject *mo = new MetaObject(this);
+
+    // ### Optimize!
+    QMetaObjectBuilder mob;
+    mob.setSuperClass(&QQmlBoundSignalParameters::staticMetaObject);
+    mob.setClassName("QQmlBoundSignalParameters");
+
+    QList<QByteArray> paramTypes = method.parameterTypes();
+    QList<QByteArray> paramNames = method.parameterNames();
+    types = new int[paramTypes.count()];
+    for (int ii = 0; ii < paramTypes.count(); ++ii) {
+        const QByteArray &type = paramTypes.at(ii);
+        const QByteArray &name = paramNames.at(ii);
+
+        if (name.isEmpty() || type.isEmpty()) {
+            types[ii] = 0;
+            continue;
+        }
+
+        QVariant::Type t = (QVariant::Type)QMetaType::type(type.constData());
+        if (QQmlMetaType::isQObject(t)) {
+            types[ii] = QMetaType::QObjectStar;
+            QMetaPropertyBuilder prop = mob.addProperty(name, "QObject*");
+            prop.setWritable(false);
+        } else {
+            QByteArray propType = type;
+            if (t >= QVariant::UserType || t == QVariant::Invalid) {
+                QByteArray scope;
+                QByteArray name;
+                int scopeIdx = propType.lastIndexOf("::");
+                if (scopeIdx != -1) {
+                    scope = propType.left(scopeIdx);
+                    name = propType.mid(scopeIdx + 2);
+                } else {
+                    name = propType;
+                }
+                const QMetaObject *meta;
+                if (scope == "Qt")
+                    meta = &QObject::staticQtMetaObject;
+                else
+                    meta = parent->parent()->metaObject();   //### assumes parent->parent()
+                for (int i = meta->enumeratorCount() - 1; i >= 0; --i) {
+                    QMetaEnum m = meta->enumerator(i);
+                    if ((m.name() == name) && (scope.isEmpty() || (m.scope() == scope))) {
+                        t = QVariant::Int;
+                        propType = "int";
+                        break;
+                    }
+                }
+            }
+            types[ii] = t;
+            QMetaPropertyBuilder prop = mob.addProperty(name, propType);
+            prop.setWritable(false);
+        }
+    }
+    myMetaObject = mob.toMetaObject();
+    *static_cast<QMetaObject *>(mo) = *myMetaObject;
+
+    d_ptr->metaObject = mo;
+}
+
+QQmlBoundSignalParameters::~QQmlBoundSignalParameters()
+{
+    delete [] types;
+    free(myMetaObject);
+}
+
+void QQmlBoundSignalParameters::setValues(void **v)
+{
+    values = v;
+}
+
+void QQmlBoundSignalParameters::clearValues()
+{
+    values = 0;
+}
+
+int QQmlBoundSignalParameters::metaCall(QMetaObject::Call c, int id, void **a)
+{
+    if (!values)
+        return -1;
+
+    if (c == QMetaObject::ReadProperty && id >= 1) {
+        int t = types[id - 1];
+        void *p = a[0];
+        QMetaType::destruct(t, p);
+        QMetaType::construct(t, p, values[id]);
+        return -1;
+    } else {
+        return qt_metacall(c, id, a);
+    }
+}
+
+QT_END_NAMESPACE
+
+#include <qqmlboundsignal.moc>