Initial import of kinetic-dui branch from the old kinetic

1 files changed, 290 insertions, 0 deletions

diff --git a/src/declarative/util/qmlconnection.cpp b/src/declarative/util/qmlconnection.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, 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.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qmlconnection.h"
+#include <QtDeclarative/qmlexpression.h>
+#include "private/qmlboundsignal_p.h"
+#include "private/qobject_p.h"
+#include <QtDeclarative/qmlcontext.h>
+#include <QtCore/qdebug.h>
+
+
+QT_BEGIN_NAMESPACE
+class QmlConnectionPrivate : public QObjectPrivate
+{
+public:
+    QmlConnectionPrivate() : ctxt(0), boundsignal(0), signalSender(0), componentcomplete(false) {}
+
+    QmlContext *ctxt;
+    QmlBoundSignal *boundsignal;
+    QObject *signalSender;
+    QString script;
+    QString signal;
+    bool componentcomplete;
+};
+
+/*!
+    \qmlclass Connection QmlConnection
+    \brief The Connection element describes generalized connections to signals.
+
+    JavaScript-in-HTML style \l {qmlformatsignalscpp}{signal properties} do not allow:
+    \list
+        \i connecting to signals with the same name but different parameters
+        \i conformance checking that parameters are correctly named
+        \i multiple connections to the same signal
+        \i connections outside the scope of the signal sender
+        \i signals in classes with coincidentally-named on<Signal> properties
+    \endlist
+
+    When any of these is needed, the Connection element can be used instead.
+    Where a signal could be connected like this:
+
+    \code
+    <MouseRegion onClicked="foo(x+123,y+456)" />
+    \endcode
+
+    An equivalent binding can be made with a Connection element:
+
+    \code
+    <MouseRegion>
+        <Connection signal="clicked(x,y)" script="foo(x+123,y+456)" />
+    </MouseRegion>
+    \endcode
+
+    More generally, the Connection element can be a child of some other element than
+    the sender of the signal, and the script is the default attribute:
+
+    \code
+    <MouseRegion id="mr"/>
+    ...
+    <Connection sender="{mr}" signal="clicked(x,y)">
+        foo(x+123,y+456)
+    </Connection>
+    \endcode
+*/
+
+/*!
+    \internal
+    \class QmlConnection
+    \brief The QmlConnection class describes generalized connections to signals.
+
+    QmlSetProperties is a mechanism for connecting a script to be run when
+    some object sends a signal.
+*/
+QmlConnection::QmlConnection(QObject *parent) :
+    QObject(*(new QmlConnectionPrivate), parent)
+{
+    Q_D(QmlConnection);
+    d->ctxt = QmlContext::activeContext();
+}
+
+QmlConnection::~QmlConnection()
+{
+    Q_D(QmlConnection);
+    delete d->boundsignal;
+}
+
+/*!
+    \qmlproperty Object Connection::sender
+    This property holds the object that sends the signal.
+
+    By default, the sender is assumed to be the parent of the Connection.
+*/
+
+/*!
+    \property QmlConnection::sender
+    \brief the object that sends the signal.
+
+    By default, the sender is assumed to be the parent of the Connection.
+
+    Note that the set/get methods are setSignalSender() and signalSender(),
+    due to the pre-existence of QObject::sender().
+*/
+QObject *QmlConnection::signalSender() const
+{
+    Q_D(const QmlConnection);
+    return d->signalSender ? d->signalSender : parent();
+}
+
+void QmlConnection::setSignalSender(QObject *obj)
+{
+    Q_D(QmlConnection);
+    if (d->signalSender == obj)
+        return;
+    disconnectIfValid();
+    d->signalSender = obj;
+    connectIfValid();
+}
+
+void QmlConnection::connectIfValid()
+{
+    Q_D(QmlConnection);
+    if (!d->componentcomplete)
+        return;
+    // boundsignal must not exist
+    if ((d->signalSender || parent()) && !d->signal.isEmpty() && !d->script.isEmpty()) {
+        // create
+        // XXX scope?
+        int sigIdx = -1;
+        int lparen = d->signal.indexOf(QLatin1Char('('));
+        QList<QByteArray> sigparams;
+        if (lparen >= 0 && d->signal.length() > lparen+2) {
+            QStringList l = d->signal.mid(lparen+1,d->signal.length()-lparen-2).split(QLatin1Char(','));
+            foreach (QString s, l) {
+                sigparams.append(s.toLatin1());
+            }
+        }
+        QString signalname = d->signal.left(lparen);
+        QObject *sender = d->signalSender ? d->signalSender : parent();
+        const QMetaObject *mo = sender->metaObject();
+        int methods = mo->methodCount();
+        for(int ii = 0; ii < methods; ++ii) {
+            QMetaMethod method = mo->method(ii);
+            QString methodName = QLatin1String(method.signature());
+            int idx = methodName.indexOf(QLatin1Char('('));
+            methodName = methodName.left(idx);
+            if(methodName == signalname && (lparen<0 || method.parameterNames() == sigparams)) {
+                sigIdx = ii;
+                break;
+            }
+        }
+        if (sigIdx < 0) {
+            qWarning() << "signal" << d->signal << "not found";
+            return;
+        }
+
+        if (sigparams.isEmpty())
+            d->boundsignal = new QmlBoundSignal(d->ctxt, d->script, sender, sigIdx, this);
+        else
+            d->boundsignal = new QmlBoundSignalProxy(new QmlContext(d->ctxt,this), d->script, sender, sigIdx, this);
+    }
+}
+
+void QmlConnection::disconnectIfValid()
+{
+    Q_D(QmlConnection);
+    if (!d->componentcomplete)
+        return;
+    if ((d->signalSender || parent()) && !d->signal.isEmpty() && !d->script.isEmpty()) {
+        // boundsignal must exist
+        // destroy
+        delete d->boundsignal;
+        d->boundsignal = 0;
+    }
+}
+
+void QmlConnection::componentComplete()
+{
+    Q_D(QmlConnection);
+    d->componentcomplete=true;
+    connectIfValid();
+}
+
+
+/*!
+    \qmlproperty string Connection::script
+    This property holds the JavaScript executed whenever the signal is sent.
+
+    This is the default attribute of Connection.
+*/
+
+/*!
+    \property QmlConnection::script
+    \brief the JavaScript executed whenever the signal is sent.
+*/
+QString QmlConnection::script() const
+{
+    Q_D(const QmlConnection);
+    return d->script;
+}
+
+void QmlConnection::setScript(const QString& script)
+{
+    Q_D(QmlConnection);
+    if ((d->signalSender || parent()) && !d->signal.isEmpty()) {
+        if (d->script.isEmpty()) {
+            // mustn't exist - create
+            d->script = script;
+            connectIfValid();
+        } else {
+            // must exist - update
+            d->script = script;
+            d->boundsignal->setExpression(script);
+        }
+    } else {
+        d->script = script;
+    }
+}
+
+/*!
+    \qmlproperty string Connection::signal
+    This property holds the signal from the sender to which the script is attached.
+
+    The signal must have its formal parameter names given in parentheses:
+
+    \code
+        <Connection signal="clicked(x,y)" ... />
+    \endcode
+*/
+
+/*!
+    \property QmlConnection::signal
+    \brief the signal from the sender to which the script is attached.
+*/
+QString QmlConnection::signal() const
+{
+    Q_D(const QmlConnection);
+    return d->signal;
+}
+
+void QmlConnection::setSignal(const QString& sig)
+{
+    Q_D(QmlConnection);
+    if (d->signal == sig)
+        return;
+    disconnectIfValid();
+    d->signal =  sig;
+    connectIfValid();
+}
+
+QML_DEFINE_TYPE(QmlConnection,Connection);
+
+QT_END_NAMESPACE