Simplified, type-safe C++ configuration access.

* New offapi com.sun.star.configuration entities to access the complete
configuration read-only or read/write...
* ...configmgr adapted to support those new services/singletons...
* ...new unotools/configuration.hxx is the type-safe C++ plumbing on top of
that...
* ...officecfg now generates C++ headers to access all the properties and sets
given in the .xcs files...
* ...and svl's asiancfg.cxx exemplarily makes use of the new
officecfg/Office/Common.hxx to access the configuration.
* There is still TODOs:  For one, see those listed in
officecfg/registry/cppheader.xsl.  For another, at least a notification
mechanism for the new read-only configuration access and the C++ wrapper is
missing.

1 files changed, 270 insertions, 0 deletions

diff --git a/unotools/inc/unotools/configuration.hxx b/unotools/inc/unotools/configuration.hxx
new file mode 100644
index 000000000000..c9969c8a024f
--- /dev/null
+++ b/unotools/inc/unotools/configuration.hxx
@@ -0,0 +1,270 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * Version: MPL 1.1 / GPLv3+ / LGPLv3+
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License or as specified alternatively below. You may obtain a copy of
+ * the License at http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * Major Contributor(s):
+ * Copyright (C) 2011 Red Hat, Inc., Stephan Bergmann <sbergman@redhat.com>
+ * (initial developer)
+ *
+ * All Rights Reserved.
+ *
+ * For minor contributions see the git repository.
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 3 or later (the "GPLv3+"), or
+ * the GNU Lesser General Public License Version 3 or later (the "LGPLv3+"),
+ * in which case the provisions of the GPLv3+ or the LGPLv3+ are applicable
+ * instead of those above.
+ */
+
+#ifndef INCLUDED_UNOTOOLS_CONFIGURATION_HXX
+#define INCLUDED_UNOTOOLS_CONFIGURATION_HXX
+
+#include "sal/config.h"
+
+#include "boost/noncopyable.hpp"
+#include "boost/shared_ptr.hpp"
+#include "com/sun/star/uno/Any.hxx"
+#include "com/sun/star/uno/Reference.hxx"
+#include "sal/types.h"
+#include "unotools/unotoolsdllapi.h"
+
+namespace com { namespace sun { namespace star {
+    namespace configuration { class XReadWriteAccess; }
+    namespace container {
+        class XHierarchicalNameAccess;
+        class XNameAccess;
+        class XNameContainer;
+    }
+    namespace uno { class XComponentContext; }
+} } }
+namespace rtl { class OUString; }
+
+namespace unotools {
+
+namespace detail { class ConfigurationWrapper; }
+
+/// A batch of configuration changes that is committed as a whole.
+///
+/// Client code needs to call commit explicitly; otherwise the changes are lost
+/// when the instance is destroyed.
+///
+/// This is the only class from this header file that client code should use
+/// directly.
+class UNOTOOLS_DLLPUBLIC ConfigurationChanges: private boost::noncopyable {
+public:
+    static boost::shared_ptr< ConfigurationChanges > create(
+        com::sun::star::uno::Reference< com::sun::star::uno::XComponentContext >
+            const & context);
+
+    ~ConfigurationChanges();
+
+    void commit() const;
+
+private:
+    SAL_DLLPRIVATE ConfigurationChanges(
+        com::sun::star::uno::Reference< com::sun::star::uno::XComponentContext >
+            const & context);
+
+    SAL_DLLPRIVATE void setPropertyValue(
+        rtl::OUString const & path, com::sun::star::uno::Any const & value)
+        const;
+
+    SAL_DLLPRIVATE
+    com::sun::star::uno::Reference< com::sun::star::container::XNameContainer >
+    getSet(rtl::OUString const & path) const;
+
+    com::sun::star::uno::Reference<
+        com::sun::star::configuration::XReadWriteAccess > access_;
+
+    friend class detail::ConfigurationWrapper;
+};
+
+namespace detail {
+
+/// @internal
+class UNOTOOLS_DLLPUBLIC ConfigurationWrapper: private boost::noncopyable {
+public:
+    static ConfigurationWrapper const & get(
+        com::sun::star::uno::Reference< com::sun::star::uno::XComponentContext >
+            const & context);
+
+    SAL_DLLPRIVATE explicit ConfigurationWrapper(
+        com::sun::star::uno::Reference< com::sun::star::uno::XComponentContext >
+            const & context);
+
+    SAL_DLLPRIVATE ~ConfigurationWrapper();
+
+    com::sun::star::uno::Any getPropertyValue(rtl::OUString const & path) const;
+
+    void setPropertyValue(
+        boost::shared_ptr< ConfigurationChanges > const & batch,
+        rtl::OUString const & path, com::sun::star::uno::Any const & value)
+        const;
+
+    com::sun::star::uno::Any getLocalizedPropertyValue(
+        rtl::OUString const & path) const;
+
+    void setLocalizedPropertyValue(
+        boost::shared_ptr< ConfigurationChanges > const & batch,
+        rtl::OUString const & path, com::sun::star::uno::Any const & value)
+        const;
+
+    com::sun::star::uno::Reference< com::sun::star::container::XNameAccess >
+    getSetReadOnly(rtl::OUString const & path) const;
+
+    com::sun::star::uno::Reference< com::sun::star::container::XNameContainer >
+    getSetReadWrite(
+        boost::shared_ptr< ConfigurationChanges > const & batch,
+        rtl::OUString const & path) const;
+
+    boost::shared_ptr< ConfigurationChanges > createChanges() const;
+
+private:
+    rtl::OUString extendLocalizedPath(rtl::OUString const & path) const;
+
+    com::sun::star::uno::Reference< com::sun::star::uno::XComponentContext >
+        context_;
+
+    com::sun::star::uno::Reference<
+        com::sun::star::container::XHierarchicalNameAccess > access_;
+};
+
+}
+
+/// A type-safe wrapper around a (non-localized) configuration property.
+///
+/// Automatically generated headers for the various configuration properties
+/// derive from this template and make available its member functions to access
+/// each given configuration property.
+template< typename T, typename U > struct ConfigurationProperty:
+    private boost::noncopyable
+{
+    /// Get the value of the given (non-localized) configuration property.
+    ///
+    /// For nillable properties, U is of type boost::optional<U'>.
+    static U get(
+        com::sun::star::uno::Reference< com::sun::star::uno::XComponentContext >
+            const & context)
+    {
+        // Folding this into one statement causes a bogus error at least with
+        // Red Hat GCC 4.6.2-1:
+        com::sun::star::uno::Any a(
+            detail::ConfigurationWrapper::get(context).getPropertyValue(
+                T::path()));
+        return a.get< U >();
+    }
+
+    /// Set the value of the given (non-localized) configuration property, via a
+    /// given changes batch.
+    ///
+    /// For nillable properties, U is of type boost::optional<U'>.
+    static void set(
+        com::sun::star::uno::Reference< com::sun::star::uno::XComponentContext >
+            const & context,
+        boost::shared_ptr< ConfigurationChanges > const & batch,
+        U const & value)
+    {
+        detail::ConfigurationWrapper::get(context).setPropertyValue(
+            batch, T::path(), com::sun::star::uno::makeAny(value));
+    }
+
+private:
+    ConfigurationProperty(); // not defined
+    ~ConfigurationProperty(); // not defined
+};
+
+/// A type-safe wrapper around a localized configuration property.
+///
+/// Automatically generated headers for the various localized configuration
+/// properties derive from this template and make available its member functions
+/// to access each given localized configuration property.
+template< typename T, typename U > struct ConfigurationLocalizedProperty:
+    private boost::noncopyable
+{
+    /// Get the value of the given localized configuration property, for the
+    /// locale currently set at the
+    /// com.sun.star.configuration.theDefaultProvider.
+    ///
+    /// For nillable properties, U is of type boost::optional<U'>.
+    static U get(
+        com::sun::star::uno::Reference< com::sun::star::uno::XComponentContext >
+            const & context)
+    {
+        // Folding this into one statement causes a bogus error at least with
+        // Red Hat GCC 4.6.2-1:
+        com::sun::star::uno::Any a(
+            detail::ConfigurationWrapper::get(context).
+            getLocalizedPropertyValue(T::path()));
+        return a.get< U >();
+    }
+
+    /// Set the value of the given localized configuration property, for the
+    /// locale currently set at the
+    /// com.sun.star.configuration.theDefaultProvider, via a given changes
+    /// batch.
+    ///
+    /// For nillable properties, U is of type boost::optional<U'>.
+    static void set(
+        com::sun::star::uno::Reference< com::sun::star::uno::XComponentContext >
+            const & context,
+        boost::shared_ptr< ConfigurationChanges > const & batch,
+        U const & value)
+    {
+        detail::ConfigurationWrapper::get(context).setLocalizedPropertyValue(
+            batch, T::path(), com::sun::star::uno::makeAny(value));
+    }
+
+private:
+    ConfigurationLocalizedProperty(); // not defined
+    ~ConfigurationLocalizedProperty(); // not defined
+};
+
+/// A type-safe wrapper around a configuration set.
+///
+/// Automatically generated headers for the various configuration sets derive
+/// from this template and make available its member functions to access each
+/// given configuration set.
+template< typename T > struct ConfigurationSet: private boost::noncopyable {
+    /// Get read-only access to the given configuration set.
+    static
+    com::sun::star::uno::Reference< com::sun::star::container::XNameAccess >
+    get(com::sun::star::uno::Reference< com::sun::star::uno::XComponentContext >
+            const & context)
+    {
+        return detail::ConfigurationWrapper::get(context).getSetReadOnly(
+            T::path());
+    }
+
+    /// Get read/write access to the given configuration set, storing any
+    /// modifications via the given changes batch.
+    static
+    com::sun::star::uno::Reference< com::sun::star::container::XNameContainer >
+    get(com::sun::star::uno::Reference< com::sun::star::uno::XComponentContext >
+            const & context,
+        boost::shared_ptr< ConfigurationChanges > const & batch)
+    {
+        return detail::ConfigurationWrapper::get(context).getSetReadWrite(
+            batch, T::path());
+    }
+
+private:
+    ConfigurationSet(); // not defined
+    ~ConfigurationSet(); // not defined
+};
+
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */