AOO410/main/framework/source/inc/accelerators/acceleratorcache.hxx

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#ifndef __FRAMEWORK_ACCELERATORS_ACCELERATORCACHE_HXX_
#define __FRAMEWORK_ACCELERATORS_ACCELERATORCACHE_HXX_

//__________________________________________
// own includes

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

//__________________________________________
// interface includes

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

//__________________________________________
// other includes
#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 ::std::hash_map< css::awt::KeyEvent ,
                                 ::rtl::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 */
        virtual 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 ::rtl::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 ::rtl::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 ::rtl::OUString& sCommand) const;
        
        //---------------------------------------
        /** TODO */
        virtual ::rtl::OUString getCommandByKey(const css::awt::KeyEvent& aKey) const;
        
        //---------------------------------------
        /** TODO */
        virtual void removeKey(const css::awt::KeyEvent& aKey);
        virtual void removeCommand(const ::rtl::OUString& sCommand);
};

} // namespace framework

#endif // __FRAMEWORK_ACCELERATORS_ACCELERATORCACHE_HXX_