loongoffice/framework/source/inc/accelerators/acceleratorcache.hxx

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 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
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#ifndef INCLUDED_FRAMEWORK_SOURCE_INC_ACCELERATORS_ACCELERATORCACHE_HXX
#define INCLUDED_FRAMEWORK_SOURCE_INC_ACCELERATORS_ACCELERATORCACHE_HXX

#include <threadhelp/threadhelpbase.hxx>
#include <general.h>
#include <stdtypes.h>

#include <com/sun/star/awt/KeyEvent.hpp>

#include <comphelper/sequenceasvector.hxx>


// definition

namespace framework
{


/**
    @short  implements a cache for any accelerator configuration.

    @descr  Its implemented threadsafe, supports copy-on-write pattern
            and a flush mechansim to support concurrent access to the same
            configuration.

            copy-on-write ... How? Do the following:
 */
class AcceleratorCache : public ThreadHelpBase // attention! Must be the first base class to guarentee right initialize lock ...
{

    // const, types

    public:


        /** TODO document me
            commands -> keys
        */
        typedef ::comphelper::SequenceAsVector< css::awt::KeyEvent > TKeyList;
        typedef BaseHash< TKeyList > TCommand2Keys;


        /** TODO document me
            keys -> commands
        */
        typedef ::boost::unordered_map< css::awt::KeyEvent ,
                                 OUString    ,
                                 KeyEventHashCode   ,
                                 KeyEventEqualsFunc > TKey2Commands;


    // member

    private:


        /** map commands to keys in relation 1:n.
            First key is interpreted as preferred one! */
        TCommand2Keys m_lCommand2Keys;


        /** map keys to commands in relation 1:1. */
        TKey2Commands m_lKey2Commands;


    // interface

    public:


        /** @short  creates a new - but empty - cache instance. */
        AcceleratorCache();


        /** @short  make a copy of this cache.
            @descr  Used for the copy-on-write feature.
        */
        AcceleratorCache(const AcceleratorCache& rCopy);


        /** @short  does nothing real. */
        virtual ~AcceleratorCache();


        /** @short  write changes back to the original container.

            @param  rCopy
                    the (changed!) copy, which should be written
                    back to this original container.
          */
        virtual void takeOver(const AcceleratorCache& rCopy);


        /** TODO document me */
        AcceleratorCache& operator=(const AcceleratorCache& rCopy);


        /** @short  checks if the specified key exists.

            @param  aKey
                    the key, which should be checked.

            @return [bool]
                    sal_True if the speicfied key exists inside this container.
         */
        virtual sal_Bool hasKey(const css::awt::KeyEvent& aKey) const;
        virtual sal_Bool hasCommand(const OUString& sCommand) const;


        /** TODO document me */
        virtual TKeyList getAllKeys() const;


        /** @short  add a new or change an existing key-command pair
                    of this container.

            @param  aKey
                    describe the key.

            @param  sCommand
                    describe the command.
          */
        virtual void setKeyCommandPair(const css::awt::KeyEvent& aKey    ,
                                       const OUString&    sCommand);


        /** @short  returns the list of keys, which are registered
                    for this command.

            @param  sCommand
                    describe the command.

            @return [TKeyList]
                    the list of registered keys. Can be empty!
          */
        virtual TKeyList getKeysByCommand(const OUString& sCommand) const;


        /** TODO */
        virtual OUString getCommandByKey(const css::awt::KeyEvent& aKey) const;


        /** TODO */
        virtual void removeKey(const css::awt::KeyEvent& aKey);
        virtual void removeCommand(const OUString& sCommand);
};

} // namespace framework

#endif // INCLUDED_FRAMEWORK_SOURCE_INC_ACCELERATORS_ACCELERATORCACHE_HXX

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