1 files changed, 306 insertions, 0 deletions
diff --git a/src/declarative/qml/qdeclarativeboundsignal.cpp b/src/declarative/qml/qdeclarativeboundsignal.cpp
new file mode 100644
index 0000000000..47a15cb0ce
--- /dev/null
+++ b/src/declarative/qml/qdeclarativeboundsignal.cpp
@@ -0,0 +1,306 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 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 "private/qdeclarativeboundsignal_p.h"
+
+#include "private/qmetaobjectbuilder_p.h"
+#include "private/qdeclarativeengine_p.h"
+#include "private/qdeclarativeexpression_p.h"
+#include "private/qdeclarativecontext_p.h"
+#include "private/qdeclarativemetatype_p.h"
+#include "qdeclarative.h"
+#include "qdeclarativecontext.h"
+#include "private/qdeclarativeglobal_p.h"
+#include "private/qdeclarativedebugtrace_p.h"
+
+#include <QtCore/qstringbuilder.h>
+#include <QtCore/qdebug.h>
+
+QT_BEGIN_NAMESPACE
+
+class QDeclarativeBoundSignalParameters : public QObject
+{
+Q_OBJECT
+public:
+    QDeclarativeBoundSignalParameters(const QMetaMethod &, QObject * = 0);
+    ~QDeclarativeBoundSignalParameters();
+
+    void setValues(void **);
+    void clearValues();
+
+private:
+    friend class MetaObject;
+    int metaCall(QMetaObject::Call, int _id, void **);
+    struct MetaObject : public QAbstractDynamicMetaObject {
+        MetaObject(QDeclarativeBoundSignalParameters *b)
+            : parent(b) {}
+
+        int metaCall(QMetaObject::Call c, int id, void **a) { 
+            return parent->metaCall(c, id, a);
+        }
+        QDeclarativeBoundSignalParameters *parent;
+    };
+
+    int *types;
+    void **values;
+    QMetaObject *myMetaObject;
+};
+
+static int evaluateIdx = -1;
+
+QDeclarativeAbstractBoundSignal::QDeclarativeAbstractBoundSignal(QObject *parent)
+: QObject(parent)
+{
+}
+
+QDeclarativeAbstractBoundSignal::~QDeclarativeAbstractBoundSignal()
+{
+}
+
+QDeclarativeBoundSignal::QDeclarativeBoundSignal(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();
+
+    QDeclarative_setParent_noEvent(this, parent);
+    QDeclarativePropertyPrivate::connect(scope, m_signal.methodIndex(), this, evaluateIdx);
+}
+
+QDeclarativeBoundSignal::QDeclarativeBoundSignal(QDeclarativeContext *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();
+
+    QDeclarative_setParent_noEvent(this, parent);
+    QDeclarativePropertyPrivate::connect(scope, m_signal.methodIndex(), this, evaluateIdx);
+
+    m_expression = new QDeclarativeExpression(ctxt, scope, val);
+}
+
+QDeclarativeBoundSignal::~QDeclarativeBoundSignal()
+{
+    delete m_expression;
+    m_expression = 0;
+}
+
+int QDeclarativeBoundSignal::index() const 
+{ 
+    return m_signal.methodIndex();
+}
+
+/*!
+    Returns the signal expression.
+*/
+QDeclarativeExpression *QDeclarativeBoundSignal::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 QDeclarativeBoundSignal instance takes ownership of \a e.  The caller is 
+    assumes ownership of the returned QDeclarativeExpression.
+*/
+QDeclarativeExpression *QDeclarativeBoundSignal::setExpression(QDeclarativeExpression *e)
+{
+    QDeclarativeExpression *rv = m_expression;
+    m_expression = e;
+    if (m_expression) m_expression->setNotifyOnValueChanged(false);
+    return rv;
+}
+
+QDeclarativeBoundSignal *QDeclarativeBoundSignal::cast(QObject *o)
+{
+    QDeclarativeAbstractBoundSignal *s = qobject_cast<QDeclarativeAbstractBoundSignal*>(o);
+    return static_cast<QDeclarativeBoundSignal *>(s);
+}
+
+int QDeclarativeBoundSignal::qt_metacall(QMetaObject::Call c, int id, void **a)
+{
+    if (c == QMetaObject::InvokeMetaMethod && id == evaluateIdx) {
+        if (!m_expression)
+            return -1;
+        if (QDeclarativeDebugService::isDebuggingEnabled()) {
+            QDeclarativeDebugTrace::startRange(QDeclarativeDebugTrace::HandlingSignal);
+            QDeclarativeDebugTrace::rangeData(QDeclarativeDebugTrace::HandlingSignal, QLatin1String(m_signal.signature()) % QLatin1String(": ") % m_expression->expression());
+            QDeclarativeDebugTrace::rangeLocation(QDeclarativeDebugTrace::HandlingSignal, m_expression->sourceFile(), m_expression->lineNumber());
+        }
+        m_isEvaluating = true;
+        if (!m_paramsValid) {
+            if (!m_signal.parameterTypes().isEmpty())
+                m_params = new QDeclarativeBoundSignalParameters(m_signal, this);
+            m_paramsValid = true;
+        }
+
+        if (m_params) m_params->setValues(a);
+        if (m_expression && m_expression->engine()) {
+            QDeclarativeExpressionPrivate::get(m_expression)->value(m_params);
+            if (m_expression && m_expression->hasError())
+                QDeclarativeEnginePrivate::warning(m_expression->engine(), m_expression->error());
+        }
+        if (m_params) m_params->clearValues();
+        m_isEvaluating = false;
+        QDeclarativeDebugTrace::endRange(QDeclarativeDebugTrace::HandlingSignal);
+        return -1;
+    } else {
+        return QObject::qt_metacall(c, id, a);
+    }
+}
+
+QDeclarativeBoundSignalParameters::QDeclarativeBoundSignalParameters(const QMetaMethod &method, 
+                                                                     QObject *parent)
+: QObject(parent), types(0), values(0)
+{
+    MetaObject *mo = new MetaObject(this);
+
+    // ### Optimize!
+    QMetaObjectBuilder mob;
+    mob.setSuperClass(&QDeclarativeBoundSignalParameters::staticMetaObject);
+    mob.setClassName("QDeclarativeBoundSignalParameters");
+
+    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 (QDeclarativeMetaType::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) {
+                //copy of QDeclarativeObjectScriptClass::enumType()
+                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;
+                    }
+                }
+            }
+            if (QDeclarativeMetaType::canCopy(t)) {
+                types[ii] = t;
+                QMetaPropertyBuilder prop = mob.addProperty(name, propType);
+                prop.setWritable(false);
+            } else {
+                types[ii] = 0x80000000 | t;
+                QMetaPropertyBuilder prop = mob.addProperty(name, "QVariant");
+                prop.setWritable(false);
+            }
+        }
+    }
+    myMetaObject = mob.toMetaObject();
+    *static_cast<QMetaObject *>(mo) = *myMetaObject;
+
+    d_ptr->metaObject = mo;
+}
+
+QDeclarativeBoundSignalParameters::~QDeclarativeBoundSignalParameters()
+{
+    delete [] types;
+    qFree(myMetaObject);
+}
+
+void QDeclarativeBoundSignalParameters::setValues(void **v)
+{
+    values = v;
+}
+
+void QDeclarativeBoundSignalParameters::clearValues()
+{
+    values = 0;
+}
+
+int QDeclarativeBoundSignalParameters::metaCall(QMetaObject::Call c, int id, void **a)
+{
+    if (!values)
+        return -1;
+
+    if (c == QMetaObject::ReadProperty && id >= 1) {
+        if (types[id - 1] & 0x80000000) {
+            *((QVariant *)a[0]) = QVariant(types[id - 1] & 0x7FFFFFFF, values[id]);
+        } else {
+            QDeclarativeMetaType::copy(types[id - 1], a[0], values[id]);
+        }
+        return -1;
+    } else {
+        return qt_metacall(c, id, a);
+    }
+}
+
+QT_END_NAMESPACE
+
+#include <qdeclarativeboundsignal.moc>