Added a simple app to dump the QML type system to an XML file.

src/tools/qml/qmldump/main.cpp

+#include <QApplication>
+#include <QSet>
+#include <QXmlStreamWriter>
+#include <QXmlStreamReader>
+
+#include <QMetaObject>
+#include <QMetaProperty>
+#include <QPushButton>
+#include <QDebug>
+#include <iostream>
+#include <QtDeclarative>
+#include <QtDeclarative/private/qdeclarativemetatype_p.h>
+#include <QtDeclarative/QDeclarativeView>
+
+static QHash<QByteArray, const QDeclarativeType *> qmlTypeByCppName;
+static QHash<QByteArray, QByteArray> cppToQml;
+
+QByteArray convertToQmlType(const QByteArray &cppName)
+{
+    QByteArray qmlName = cppToQml.value(cppName, cppName);
+    qmlName.replace("::", ".");
+    qmlName.replace("/", ".");
+    return qmlName;
+}
+
+void erasure(QByteArray *typeName, bool *isList, bool *isPointer)
+{
+    static QByteArray declListPrefix = "QDeclarativeListProperty<";
+
+    if (typeName->endsWith('*')) {
+        *isPointer = true;
+        typeName->truncate(typeName->length() - 1);
+        erasure(typeName, isList, isPointer);
+    } else if (typeName->startsWith(declListPrefix)) {
+        *isList = true;
+        typeName->truncate(typeName->length() - 1); // get rid of the suffix '>'
+        *typeName = typeName->mid(declListPrefix.size());
+        erasure(typeName, isList, isPointer);
+    }
+
+    *typeName = convertToQmlType(*typeName);
+}
+
+void processMetaObject(const QMetaObject *meta, QSet<const QMetaObject *> *metas)
+{
+    if (! meta || metas->contains(meta))
+        return;
+
+    metas->insert(meta);
+    processMetaObject(meta->superClass(), metas);
+}
+
+void processObject(QObject *object, QSet<const QMetaObject *> *metas)
+{
+    if (! object)
+        return;
+
+    const QMetaObject *meta = object->metaObject();
+    processMetaObject(meta, metas);
+
+    for (int index = 0; index < meta->propertyCount(); ++index) {
+        QMetaProperty prop = meta->property(index);
+        if (QDeclarativeMetaType::isQObject(prop.userType())) {
+            QObject *oo = QDeclarativeMetaType::toQObject(prop.read(object));
+            processObject(oo, metas);
+        }
+    }
+
+}
+
+void processDeclarativeType(const QDeclarativeType *ty, QSet<const QMetaObject *> *metas)
+{
+    processMetaObject(ty->metaObject(), metas);
+}
+
+void writeType(QXmlStreamAttributes *attrs, QByteArray typeName)
+{
+    bool isList = false, isPointer = false;
+    erasure(&typeName, &isList, &isPointer);
+    attrs->append(QXmlStreamAttribute("type", typeName));
+    if (isList)
+        attrs->append(QXmlStreamAttribute("isList", "true"));
+}
+
+void dump(const QMetaProperty &prop, QXmlStreamWriter *xml)
+{
+    xml->writeStartElement("property");
+
+    QXmlStreamAttributes attributes;
+    attributes.append(QXmlStreamAttribute("name", QString::fromUtf8(prop.name())));
+
+    writeType(&attributes, prop.typeName());
+
+    xml->writeAttributes(attributes);
+    xml->writeEndElement();
+}
+
+void dump(const QMetaMethod &meth, QXmlStreamWriter *xml)
+{
+    if (meth.methodType() == QMetaMethod::Signal) {
+        if (meth.access() != QMetaMethod::Protected)
+            return; // nothing to do.
+    } else if (meth.access() != QMetaMethod::Public) {
+        return; // nothing to do.
+    }
+
+    QByteArray name = meth.signature();
+    int lparenIndex = name.indexOf('(');
+    if (lparenIndex == -1) {
+        return; // invalid signature
+    }
+
+    name = name.left(lparenIndex);
+
+
+    QString elementName = QLatin1String("method");
+
+    QXmlStreamAttributes attributes;
+    if (meth.methodType() == QMetaMethod::Signal)
+        elementName = QLatin1String("signal");
+
+    xml->writeStartElement(elementName);
+
+    attributes.append(QXmlStreamAttribute("name", name));
+
+    const QString typeName = convertToQmlType(meth.typeName());
+    if (! typeName.isEmpty())
+        attributes.append(QXmlStreamAttribute("type", typeName));
+
+    xml->writeAttributes(attributes);
+
+    for (int i = 0; i < meth.parameterTypes().size(); ++i) {
+        QByteArray argName = meth.parameterNames().at(i);
+
+        xml->writeStartElement("param");
+
+        QXmlStreamAttributes attrs;
+
+        if (! argName.isEmpty())
+            attrs.append(QXmlStreamAttribute("name", argName));
+
+        writeType(&attrs, meth.parameterTypes().at(i));
+        xml->writeAttributes(attrs);
+
+        xml->writeEndElement();
+    }
+
+    xml->writeEndElement();
+}
+
+void dump(const QMetaEnum &e, QXmlStreamWriter *xml)
+{
+    xml->writeStartElement("enum");
+
+    QXmlStreamAttributes attributes;
+    attributes.append(QXmlStreamAttribute("name", QString::fromUtf8(e.name()))); // ### FIXME
+    xml->writeAttributes(attributes);
+
+    for (int index = 0; index < e.keyCount(); ++index) {
+        xml->writeStartElement("enumerator");
+
+        QXmlStreamAttributes attributes;
+        attributes.append(QXmlStreamAttribute("name", QString::fromUtf8(e.key(index))));
+        attributes.append(QXmlStreamAttribute("value", QString::number(e.value(index))));
+        xml->writeAttributes(attributes);
+
+        xml->writeEndElement();
+    }
+
+    xml->writeEndElement();
+}
+
+class FriendlyQObject: public QObject
+{
+public:
+    static const QMetaObject *qtMeta() { return &staticQtMetaObject; }
+};
+
+void dump(const QMetaObject *meta, QXmlStreamWriter *xml)
+{
+    xml->writeStartElement("type");
+
+    QXmlStreamAttributes attributes;
+    attributes.append(QXmlStreamAttribute("name", convertToQmlType(meta->className())));
+
+    if (const QDeclarativeType *qmlTy = qmlTypeByCppName.value(meta->className())) {
+        attributes.append(QXmlStreamAttribute("version", QString("%1.%2").arg(qmlTy->majorVersion()).arg(qmlTy->minorVersion())));
+    }
+
+    QString version;
+
+    if (meta->superClass())
+        attributes.append(QXmlStreamAttribute("extends", convertToQmlType(meta->superClass()->className())));
+
+    if (! version.isEmpty())
+        attributes.append(QXmlStreamAttribute("version", version));
+
+    xml->writeAttributes(attributes);
+
+    for (int index = meta->enumeratorOffset(); index < meta->enumeratorCount(); ++index)
+        dump(meta->enumerator(index), xml);
+
+    for (int index = meta->propertyOffset(); index < meta->propertyCount(); ++index)
+        dump(meta->property(index), xml);
+
+    for (int index = meta->methodOffset(); index < meta->methodCount(); ++index)
+        dump(meta->method(index), xml);
+
+    xml->writeEndElement();
+}
+
+int main(int argc, char *argv[])
+{
+    QApplication app(argc, argv);
+
+    QDeclarativeView view;
+    QDeclarativeEngine *engine = view.engine();
+
+    cppToQml.insert("QString", "string");
+
+    QSet<const QMetaObject *> metas;
+
+    metas.insert(FriendlyQObject::qtMeta());
+
+    foreach (const QDeclarativeType *ty, QDeclarativeMetaType::qmlTypes()) {
+        cppToQml.insert(ty->metaObject()->className(), ty->qmlTypeName());
+        qmlTypeByCppName.insert(ty->metaObject()->className(), ty);
+        processDeclarativeType(ty, &metas);
+    }
+
+    foreach (const QDeclarativeType *ty, QDeclarativeMetaType::qmlTypes()) {
+        QByteArray tyName = ty->qmlTypeName();
+        tyName = tyName.mid(tyName.lastIndexOf('/') + 1);
+
+        QByteArray code;
+        code += "import Qt 4.6;\n";
+        code += tyName;
+        code += " {}\n";
+
+        QDeclarativeComponent c(engine);
+        c.setData(code, QUrl("xxx"));
+        processObject(c.create(), &metas);
+    }
+
+    QByteArray bytes;
+    QXmlStreamWriter xml(&bytes);
+    xml.setAutoFormatting(true);
+
+    xml.writeStartDocument("1.0");
+    xml.writeStartElement("module");
+
+    foreach (const QMetaObject *meta, metas) {
+        dump(meta, &xml);
+    }
+
+    xml.writeEndElement();
+    xml.writeEndDocument();
+
+    std::cout << bytes.constData();
+
+    QTimer timer;
+    timer.setSingleShot(true);
+    timer.setInterval(0);
+    QObject::connect(&timer, SIGNAL(timeout()), &app, SLOT(quit()));
+
+    timer.start();
+
+    return app.exec();
+}

src/tools/qml/qmldump/qmldump.pro

+#-------------------------------------------------
+#
+# Project created by QtCreator 2010-02-24T10:21:38
+#
+#-------------------------------------------------
+
+TARGET = qmldump
+QT += declarative
+CONFIG   += console
+CONFIG   -= app_bundle
+
+TEMPLATE = app
+
+SOURCES += main.cpp