From ec7deb3d123bb44b5d57590615a60ed48b1d2860 Mon Sep 17 00:00:00 2001
From: Michael Brasser <michael.brasser@nokia.com>
Date: Fri, 23 Mar 2012 09:32:45 +1000
Subject: Add QQmlBoundSignalNoParams

This class is used for signal handlers with no parameters, and is more
lightweight than QQmlBoundSignal.

Change-Id: Ie63eb989d334906657fd16fe35386df198654c28
Reviewed-by: Chris Adams <christopher.adams@nokia.com>
---
 src/qml/qml/qqmlboundsignal.cpp | 65 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 65 insertions(+)

(limited to 'src/qml/qml/qqmlboundsignal.cpp')

diff --git a/src/qml/qml/qqmlboundsignal.cpp b/src/qml/qml/qqmlboundsignal.cpp
index d666d9ceb0..b375a70d50 100644
--- a/src/qml/qml/qqmlboundsignal.cpp
+++ b/src/qml/qml/qqmlboundsignal.cpp
@@ -300,6 +300,71 @@ int QQmlBoundSignalParameters::metaCall(QMetaObject::Call c, int id, void **a)
     }
 }
 
+////////////////////////////////////////////////////////////////////////
+
+QQmlBoundSignalNoParams::QQmlBoundSignalNoParams(QObject *scope, const QMetaMethod &signal,
+                               QObject *owner)
+: m_expression(0), m_owner(owner), m_index(signal.methodIndex()), m_isEvaluating(false)
+{
+    callback = &subscriptionCallback;
+    QQmlNotifierEndpoint::connect(scope, m_index);
+}
+
+QQmlBoundSignalNoParams::~QQmlBoundSignalNoParams()
+{
+    delete m_expression;
+    m_expression = 0;
+}
+
+int QQmlBoundSignalNoParams::index() const
+{
+    return m_index;
+}
+
+/*!
+    Returns the signal expression.
+*/
+QQmlExpression *QQmlBoundSignalNoParams::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 QQmlBoundSignalNoParams instance takes ownership of \a e.  The caller is
+    assumes ownership of the returned QQmlExpression.
+*/
+QQmlExpression *QQmlBoundSignalNoParams::setExpression(QQmlExpression *e)
+{
+    QQmlExpression *rv = m_expression;
+    m_expression = e;
+    if (m_expression) m_expression->setNotifyOnValueChanged(false);
+    return rv;
+}
+
+void QQmlBoundSignalNoParams::subscriptionCallback(QQmlNotifierEndpoint *e)
+{
+    QQmlBoundSignalNoParams *s = static_cast<QQmlBoundSignalNoParams*>(e);
+    if (!s->m_expression)
+        return;
+
+    if (QQmlDebugService::isDebuggingEnabled())
+        QV8DebugService::instance()->signalEmitted(QString::fromAscii(s->m_owner->metaObject()->method(s->m_index).signature()));
+
+    QQmlHandlingSignalProfiler prof(s->m_owner, s->m_index, s->m_expression);
+
+    s->m_isEvaluating = true;
+
+    if (s->m_expression && s->m_expression->engine()) {
+        QQmlExpressionPrivate::get(s->m_expression)->value();
+        if (s->m_expression && s->m_expression->hasError())
+            QQmlEnginePrivate::warning(s->m_expression->engine(), s->m_expression->error());
+    }
+    s->m_isEvaluating = false;
+}
+
 QT_END_NAMESPACE
 
 #include <qqmlboundsignal.moc>
-- 
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