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| -rw-r--r-- | include/comphelper/configuration.hxx | 342 |
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: */ |