Say hello to QtQuick module

This change moves the QtQuick 2 types and C++ API (including
SceneGraph) to a new module (AKA library), QtQuick.

99% of this change is moving files from src/declarative to
src/quick, and from tests/auto/declarative to
tests/auto/qtquick2.

The loading of QtQuick 2 ("import QtQuick 2.0") is now delegated to
a plugin, src/imports/qtquick2, just like it's done for QtQuick 1.

All tools, examples, and tests that use QtQuick C++ API have gotten
"QT += quick" or "QT += quick-private" added to their .pro file.

A few additional internal QtDeclarative classes had to be exported
(via Q_DECLARATIVE_PRIVATE_EXPORT) since they're needed by the
QtQuick 2 implementation.

The old header locations (e.g. QtDeclarative/qquickitem.h) will
still be supported for some time, but will produce compile-time
warnings. (To avoid the QtQuick implementation using the
compatibility headers (since QtDeclarative's includepath comes
first), a few include statements were modified, e.g. from
"#include <qsgnode.h>" to "#include <QtQuick/qsgnode.h>".)

There's a change in qtbase that automatically adds QtQuick to the
module list if QtDeclarative is used. Together with the compatibility
headers, this should help reduce the migration pain for existing
projects.

In theory, simply getting an existing QtDeclarative-based project
to compile and link shouldn't require any changes for now -- but
porting to the new scheme is of course recommended, and will
eventually become mandatory.

Task-number: QTBUG-22889
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>
Change-Id: Ia52be9373172ba2f37e7623231ecb060316c96a7
Reviewed-by: Kent Hansen <kent.hansen@nokia.com>
Reviewed-by: Sergio Ahumada <sergio.ahumada@nokia.com>

1 files changed, 302 insertions, 0 deletions

diff --git a/src/quick/util/qdeclarativeconnections.cpp b/src/quick/util/qdeclarativeconnections.cpp
new file mode 100644
index 0000000000..ee2c6edcc5
--- /dev/null
+++ b/src/quick/util/qdeclarativeconnections.cpp
@@ -0,0 +1,302 @@
+/****************************************************************************
+**
+** 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.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 "qdeclarativeconnections_p.h"
+
+#include <private/qdeclarativeexpression_p.h>
+#include <private/qdeclarativeproperty_p.h>
+#include <private/qdeclarativeboundsignal_p.h>
+#include <qdeclarativecontext.h>
+#include <private/qdeclarativecontext_p.h>
+#include <qdeclarativeinfo.h>
+
+#include <QtCore/qdebug.h>
+#include <QtCore/qstringlist.h>
+
+#include <private/qobject_p.h>
+
+QT_BEGIN_NAMESPACE
+
+class QDeclarativeConnectionsPrivate : public QObjectPrivate
+{
+public:
+    QDeclarativeConnectionsPrivate() : target(0), targetSet(false), ignoreUnknownSignals(false), componentcomplete(true) {}
+
+    QList<QDeclarativeBoundSignal*> boundsignals;
+    QObject *target;
+
+    bool targetSet;
+    bool ignoreUnknownSignals;
+    bool componentcomplete;
+
+    QByteArray data;
+};
+
+/*!
+    \qmlclass Connections QDeclarativeConnections
+    \inqmlmodule QtQuick 2
+    \ingroup qml-utility-elements
+    \brief A Connections element describes generalized connections to signals.
+
+    A Connections object creates a connection to a QML signal.
+
+    When connecting to signals in QML, the usual way is to create an
+    "on<Signal>" handler that reacts when a signal is received, like this:
+
+    \qml
+    MouseArea {
+        onClicked: { foo(parameters) }
+    }
+    \endqml
+
+    However, it is not possible to connect to a signal in this way in some 
+    cases, such as when:
+
+    \list
+        \i Multiple connections to the same signal are required
+        \i Creating connections outside the scope of the signal sender
+        \i Connecting to targets not defined in QML
+    \endlist
+
+    When any of these are needed, the Connections element can be used instead.
+
+    For example, the above code can be changed to use a Connections object,
+    like this:
+
+    \qml
+    MouseArea {
+        Connections {
+            onClicked: foo(parameters)
+        }
+    }
+    \endqml
+
+    More generally, the Connections object can be a child of some object other than
+    the sender of the signal:
+
+    \qml
+    MouseArea {
+        id: area
+    }
+    // ...
+    \endqml
+    \qml
+    Connections {
+        target: area
+        onClicked: foo(parameters)
+    }
+    \endqml
+
+    \sa QtDeclarative
+*/
+QDeclarativeConnections::QDeclarativeConnections(QObject *parent) :
+    QObject(*(new QDeclarativeConnectionsPrivate), parent)
+{
+}
+
+QDeclarativeConnections::~QDeclarativeConnections()
+{
+}
+
+/*!
+    \qmlproperty Object QtQuick2::Connections::target
+    This property holds the object that sends the signal.
+
+    If this property is not set, the \c target defaults to the parent of the Connection.
+
+    If set to null, no connection is made and any signal handlers are ignored
+    until the target is not null.
+*/
+QObject *QDeclarativeConnections::target() const
+{
+    Q_D(const QDeclarativeConnections);
+    return d->targetSet ? d->target : parent();
+}
+
+void QDeclarativeConnections::setTarget(QObject *obj)
+{
+    Q_D(QDeclarativeConnections);
+    d->targetSet = true; // even if setting to 0, it is *set*
+    if (d->target == obj)
+        return;
+    foreach (QDeclarativeBoundSignal *s, d->boundsignals) {
+        // It is possible that target is being changed due to one of our signal
+        // handlers -> use deleteLater().
+        if (s->isEvaluating())
+            s->deleteLater();
+        else
+            delete s;
+    }
+    d->boundsignals.clear();
+    d->target = obj;
+    connectSignals();
+    emit targetChanged();
+}
+
+/*!
+    \qmlproperty bool QtQuick2::Connections::ignoreUnknownSignals
+
+    Normally, a connection to a non-existent signal produces runtime errors.
+
+    If this property is set to \c true, such errors are ignored.
+    This is useful if you intend to connect to different types of objects, handling
+    a different set of signals for each object.
+*/
+bool QDeclarativeConnections::ignoreUnknownSignals() const
+{
+    Q_D(const QDeclarativeConnections);
+    return d->ignoreUnknownSignals;
+}
+
+void QDeclarativeConnections::setIgnoreUnknownSignals(bool ignore)
+{
+    Q_D(QDeclarativeConnections);
+    d->ignoreUnknownSignals = ignore;
+}
+
+
+
+QByteArray
+QDeclarativeConnectionsParser::compile(const QList<QDeclarativeCustomParserProperty> &props)
+{
+    QByteArray rv;
+    QDataStream ds(&rv, QIODevice::WriteOnly);
+
+    for(int ii = 0; ii < props.count(); ++ii)
+    {
+        QString propName = props.at(ii).name();
+        int propLine = props.at(ii).location().line;
+
+        if (!propName.startsWith(QLatin1String("on")) || !propName.at(2).isUpper()) {
+            error(props.at(ii), QDeclarativeConnections::tr("Cannot assign to non-existent property \"%1\"").arg(propName));
+            return QByteArray();
+        }
+
+        QList<QVariant> values = props.at(ii).assignedValues();
+
+        for (int i = 0; i < values.count(); ++i) {
+            const QVariant &value = values.at(i);
+
+            if (value.userType() == qMetaTypeId<QDeclarativeCustomParserNode>()) {
+                error(props.at(ii), QDeclarativeConnections::tr("Connections: nested objects not allowed"));
+                return QByteArray();
+            } else if (value.userType() == qMetaTypeId<QDeclarativeCustomParserProperty>()) {
+                error(props.at(ii), QDeclarativeConnections::tr("Connections: syntax error"));
+                return QByteArray();
+            } else {
+                QDeclarativeScript::Variant v = qvariant_cast<QDeclarativeScript::Variant>(value);
+                if (v.isScript()) {
+                    ds << propName;
+                    ds << rewriteSignalHandler(v.asScript(), propName);
+                    ds << propLine;
+                } else {
+                    error(props.at(ii), QDeclarativeConnections::tr("Connections: script expected"));
+                    return QByteArray();
+                }
+            }
+        }
+    }
+
+    return rv;
+}
+
+void QDeclarativeConnectionsParser::setCustomData(QObject *object,
+                                            const QByteArray &data)
+{
+    QDeclarativeConnectionsPrivate *p =
+        static_cast<QDeclarativeConnectionsPrivate *>(QObjectPrivate::get(object));
+    p->data = data;
+}
+
+
+void QDeclarativeConnections::connectSignals()
+{
+    Q_D(QDeclarativeConnections);
+    if (!d->componentcomplete || (d->targetSet && !target()))
+        return;
+
+    QDataStream ds(d->data);
+    while (!ds.atEnd()) {
+        QString propName;
+        ds >> propName;
+        QString script;
+        ds >> script;
+        int line;
+        ds >> line;
+        QDeclarativeProperty prop(target(), propName);
+        if (prop.isValid() && (prop.type() & QDeclarativeProperty::SignalProperty)) {
+            QDeclarativeBoundSignal *signal =
+                new QDeclarativeBoundSignal(target(), prop.method(), this);
+
+            QString location;
+            QDeclarativeContextData *ctxtdata = 0;
+            QDeclarativeData *ddata = QDeclarativeData::get(this);
+            if (ddata) {
+                ctxtdata = ddata->outerContext;
+                if (ctxtdata && !ctxtdata->url.isEmpty())
+                    location = ddata->outerContext->url.toString();
+            }
+
+            QDeclarativeExpression *expression = ctxtdata ?
+                QDeclarativeExpressionPrivate::create(ctxtdata, 0, script, true, location, line) : 0;
+            signal->setExpression(expression);
+            d->boundsignals += signal;
+        } else {
+            if (!d->ignoreUnknownSignals)
+                qmlInfo(this) << tr("Cannot assign to non-existent property \"%1\"").arg(propName);
+        }
+    }
+}
+
+void QDeclarativeConnections::classBegin()
+{
+    Q_D(QDeclarativeConnections);
+    d->componentcomplete=false;
+}
+
+void QDeclarativeConnections::componentComplete()
+{
+    Q_D(QDeclarativeConnections);
+    d->componentcomplete=true;
+    connectSignals();
+}
+
+QT_END_NAMESPACE