1 files changed, 342 insertions, 0 deletions
diff --git a/include/comphelper/configuration.hxx b/include/comphelper/configuration.hxx
new file mode 100644
index 000000000..222b9d5af
--- /dev/null
+++ b/include/comphelper/configuration.hxx
@@ -0,0 +1,342 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#ifndef INCLUDED_COMPHELPER_CONFIGURATION_HXX
+#define INCLUDED_COMPHELPER_CONFIGURATION_HXX
+
+#include <sal/config.h>
+
+#include <optional>
+#include <string_view>
+
+#include <com/sun/star/uno/Any.hxx>
+#include <com/sun/star/uno/Reference.h>
+#include <comphelper/comphelperdllapi.h>
+#include <comphelper/processfactory.hxx>
+#include <sal/types.h>
+#include <memory>
+
+namespace com::sun::star {
+    namespace configuration { class XReadWriteAccess; }
+    namespace container {
+        class XHierarchicalNameAccess;
+        class XHierarchicalNameReplace;
+        class XNameAccess;
+        class XNameContainer;
+    }
+    namespace uno { class XComponentContext; }
+}
+
+namespace comphelper {
+
+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 COMPHELPER_DLLPUBLIC ConfigurationChanges {
+public:
+    static std::shared_ptr<ConfigurationChanges> create();
+
+    ~ConfigurationChanges();
+
+    void commit() const;
+
+private:
+    ConfigurationChanges(const ConfigurationChanges&) = delete;
+    ConfigurationChanges& operator=(const ConfigurationChanges&) = delete;
+
+    SAL_DLLPRIVATE ConfigurationChanges(
+        css::uno::Reference< css::uno::XComponentContext >
+            const & context);
+
+    SAL_DLLPRIVATE void setPropertyValue(
+        OUString const & path, css::uno::Any const & value)
+        const;
+
+    SAL_DLLPRIVATE css::uno::Reference<
+        css::container::XHierarchicalNameReplace >
+    getGroup(OUString const & path) const;
+
+    SAL_DLLPRIVATE
+    css::uno::Reference< css::container::XNameContainer >
+    getSet(OUString const & path) const;
+
+    css::uno::Reference<
+        css::configuration::XReadWriteAccess > access_;
+
+    friend class detail::ConfigurationWrapper;
+};
+
+namespace detail {
+
+/// @internal
+class COMPHELPER_DLLPUBLIC ConfigurationWrapper {
+public:
+    static ConfigurationWrapper const & get();
+
+    bool isReadOnly(OUString const & path) const;
+
+    css::uno::Any getPropertyValue(std::u16string_view path) const;
+
+    static void setPropertyValue(
+        std::shared_ptr< ConfigurationChanges > const & batch,
+        OUString const & path, css::uno::Any const & value);
+
+    css::uno::Any getLocalizedPropertyValue(
+        std::u16string_view path) const;
+
+    static void setLocalizedPropertyValue(
+        std::shared_ptr< ConfigurationChanges > const & batch,
+        OUString const & path, css::uno::Any const & value);
+
+    css::uno::Reference<
+        css::container::XHierarchicalNameAccess >
+    getGroupReadOnly(OUString const & path) const;
+
+    static css::uno::Reference<
+        css::container::XHierarchicalNameReplace >
+    getGroupReadWrite(
+        std::shared_ptr< ConfigurationChanges > const & batch,
+        OUString const & path);
+
+    css::uno::Reference< css::container::XNameAccess >
+    getSetReadOnly(OUString const & path) const;
+
+    static css::uno::Reference< css::container::XNameContainer >
+    getSetReadWrite(
+        std::shared_ptr< ConfigurationChanges > const & batch,
+        OUString const & path);
+
+    std::shared_ptr< ConfigurationChanges > createChanges() const;
+
+private:
+    SAL_DLLPRIVATE explicit ConfigurationWrapper();
+
+    SAL_DLLPRIVATE ~ConfigurationWrapper();
+
+    ConfigurationWrapper(const ConfigurationWrapper&) = delete;
+    ConfigurationWrapper& operator=(const ConfigurationWrapper&) = delete;
+
+    css::uno::Reference< css::uno::XComponentContext >          context_;
+
+    css::uno::Reference< css::configuration::XReadWriteAccess > access_;
+        // should really be a css.configuration.ReadOnlyAccess (with added
+        // css.beans.XHierarchicalPropertySetInfo), but then
+        // configmgr::Access::asProperty() would report all properties as
+        // READONLY, so isReadOnly() would not work
+};
+
+/// @internal
+template< typename T > struct Convert {
+    static css::uno::Any toAny(T const & value)
+    { return css::uno::Any(value); }
+
+    static T fromAny(css::uno::Any const & value)
+    { return value.get< T >(); }
+
+private:
+    Convert(const Convert&) = delete;
+    Convert& operator=(const Convert&) = delete;
+
+    Convert() = delete;
+    ~Convert() = delete;
+};
+
+/// @internal
+template< typename T > struct Convert< std::optional< T > >
+{
+    static css::uno::Any toAny(std::optional< T > const & value) {
+        return value
+            ? css::uno::Any(*value)
+            : css::uno::Any();
+    }
+
+    static std::optional< T > fromAny(css::uno::Any const & value)
+    {
+        return value.hasValue()
+            ? std::optional< T >(value.get< T >()) : std::optional< T >();
+    }
+
+private:
+    Convert(const Convert&) = delete;
+    Convert& operator=(const Convert&) = delete;
+
+    Convert() = delete;
+    ~Convert() = delete;
+};
+
+}
+
+/// 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
+{
+    /// Get the read-only status of the given (non-localized) configuration
+    /// property.
+    static bool isReadOnly()
+    {
+        return detail::ConfigurationWrapper::get().isReadOnly(T::path());
+    }
+
+    /// Get the value of the given (non-localized) configuration property.
+    ///
+    /// For nillable properties, U is of type std::optional<U'>.
+    static U get()
+    {
+        // Folding this into one statement causes a bogus error at least with
+        // Red Hat GCC 4.6.2-1:
+        css::uno::Any a(
+            detail::ConfigurationWrapper::get().getPropertyValue(
+                T::path()));
+        return detail::Convert< U >::fromAny(a);
+    }
+
+    /// Set the value of the given (non-localized) configuration property, via a
+    /// given changes batch.
+    ///
+    /// For nillable properties, U is of type std::optional<U'>.
+    static void set(
+        U const & value,
+        std::shared_ptr< ConfigurationChanges > const & batch)
+    {
+        comphelper::detail::ConfigurationWrapper::setPropertyValue(
+            batch, T::path(), detail::Convert< U >::toAny(value));
+    }
+
+private:
+    ConfigurationProperty(const ConfigurationProperty&) = delete;
+    ConfigurationProperty& operator=(const ConfigurationProperty&) = delete;
+
+    ConfigurationProperty() = delete;
+    ~ConfigurationProperty() = delete;
+};
+
+/// 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
+{
+    /// 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 std::optional<U'>.
+    static U get()
+    {
+        // Folding this into one statement causes a bogus error at least with
+        // Red Hat GCC 4.6.2-1:
+        css::uno::Any a(
+            detail::ConfigurationWrapper::get().
+            getLocalizedPropertyValue(T::path()));
+        return detail::Convert< U >::fromAny(a);
+    }
+
+    /// 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 std::optional<U'>.
+    static void set(
+        U const & value,
+        std::shared_ptr< ConfigurationChanges > const & batch)
+    {
+        comphelper::detail::ConfigurationWrapper::setLocalizedPropertyValue(
+            batch, T::path(), detail::Convert< U >::toAny(value));
+    }
+
+private:
+    ConfigurationLocalizedProperty(const ConfigurationLocalizedProperty&) = delete;
+    ConfigurationLocalizedProperty& operator=(const ConfigurationLocalizedProperty&) = delete;
+
+    ConfigurationLocalizedProperty() = delete;
+    ~ConfigurationLocalizedProperty() = delete;
+};
+
+/// A type-safe wrapper around a configuration group.
+///
+/// Automatically generated headers for the various configuration groups derive
+/// from this template and make available its member functions to access each
+/// given configuration group.
+template< typename T > struct ConfigurationGroup {
+    /// Get read-only access to the given configuration group.
+    static css::uno::Reference<
+        css::container::XHierarchicalNameAccess >
+    get()
+    {
+        return detail::ConfigurationWrapper::get().getGroupReadOnly(
+            T::path());
+    }
+
+    /// Get read/write access to the given configuration group, storing any
+    /// modifications via the given changes batch.
+    static css::uno::Reference<
+        css::container::XHierarchicalNameReplace >
+    get(std::shared_ptr< ConfigurationChanges > const & batch)
+    {
+        return comphelper::detail::ConfigurationWrapper::getGroupReadWrite(
+            batch, T::path());
+    }
+
+private:
+    ConfigurationGroup(const ConfigurationGroup&) = delete;
+    ConfigurationGroup& operator=(const ConfigurationGroup&) = delete;
+
+    ConfigurationGroup() = delete;
+    ~ConfigurationGroup() = delete;
+};
+
+/// 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 {
+    /// Get read-only access to the given configuration set.
+    static
+    css::uno::Reference< css::container::XNameAccess >
+    get()
+    {
+        return detail::ConfigurationWrapper::get().getSetReadOnly(
+            T::path());
+    }
+
+    /// Get read/write access to the given configuration set, storing any
+    /// modifications via the given changes batch.
+    static
+    css::uno::Reference< css::container::XNameContainer >
+    get(std::shared_ptr< ConfigurationChanges > const & batch)
+    {
+        return comphelper::detail::ConfigurationWrapper::getSetReadWrite(
+            batch, T::path());
+    }
+
+private:
+    ConfigurationSet(const ConfigurationSet&) = delete;
+    ConfigurationSet& operator=(const ConfigurationSet&) = delete;
+
+    ConfigurationSet() = delete;
+    ~ConfigurationSet() = delete;
+};
+
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */