Beginning of a new qml parser

The goal is to parse QML and JavaScript binding expressions/functions in one
go and generate data structures that allow for the parsing to happen in a thread
and the instantiation of the object tree in another thread, just reading from
the generated data structures. This will replace qqmlcompiler and the VME.

This new way of loading QML is currently hidden behind the QML_NEW_COMPILER=1
environment variable. There's lots of work left to fill in the gaps in object
construction, Component support, Component.onComplete, error messages, etc. etc.

Change-Id: I5e40643cff169f469f0b6ce151584ffee5ca5e90
Reviewed-by: Lars Knoll <lars.knoll@digia.com>

1 files changed, 97 insertions, 0 deletions

diff --git a/src/qml/qml/qqmlobjectcreator_p.h b/src/qml/qml/qqmlobjectcreator_p.h
new file mode 100644
index 0000000000..6a2b28c35d
--- /dev/null
+++ b/src/qml/qml/qqmlobjectcreator_p.h
@@ -0,0 +1,97 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the tools applications of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** 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, Digia gives you certain additional
+** rights.  These rights are described in the Digia 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.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#ifndef QQMLOBJECTCREATOR_P_H
+#define QQMLOBJECTCREATOR_P_H
+
+#include <private/qqmlimport_p.h>
+#include <private/qqmltypenamecache_p.h>
+#include <private/qv4compileddata_p.h>
+
+QT_BEGIN_NAMESPACE
+
+class QQmlAbstractBinding;
+
+namespace QtQml {
+
+struct Q_QML_EXPORT QmlObjectCreator
+{
+    QmlObjectCreator(QQmlEngine *engine,
+                     // extra data/output stored in these two
+                     QQmlContextData *contextData,
+                     QQmlCompiledData *runtimeData);
+
+    QObject *create(QObject *parent = 0)
+    { return create(unit->indexOfRootObject); }
+    QObject *create(int index, QObject *parent = 0);
+
+    QList<QQmlError> errors;
+
+    bool createVMEMetaObjectAndPropertyCache(const QV4::CompiledData::Object *obj, QQmlPropertyCache *baseTypeCache, QQmlPropertyCache **cache, QByteArray *vmeMetaObjectData) const;
+private:
+    QString stringAt(int idx) const { return unit->header.stringAt(idx); }
+
+    QVector<QQmlAbstractBinding *> setupBindings(const QV4::CompiledData::Object *obj, QV4::Object *qmlGlobal);
+    void setupFunctions(const QV4::CompiledData::Object *obj, QV4::Object *qmlGlobal);
+
+    QVariant variantForBinding(int expectedMetaType, const QV4::CompiledData::Binding *binding) const;
+
+    QString valueAsString(const QV4::CompiledData::Value *value) const;
+    static double valueAsNumber(const QV4::CompiledData::Value *value);
+    static bool valueAsBoolean(const QV4::CompiledData::Value *value);
+
+    QQmlEngine *engine;
+    const QV4::CompiledData::QmlUnit *unit;
+    const QV4::CompiledData::CompilationUnit *jsUnit;
+    QQmlContextData *context;
+    QQmlTypeNameCache *typeNameCache;
+    QQmlCompiledData *runtimeData;
+    QQmlImports imports;
+
+    QObject *_object;
+    QQmlData *_ddata;
+    QQmlPropertyCache *_propertyCache;
+};
+
+} // end namespace QtQml
+
+QT_END_NAMESPACE
+
+#endif // QQMLOBJECTCREATOR_P_H