llcommandhandler.cpp

Go to the documentation of this file.

#include "llviewerprecompiledheaders.h"

#include "llcommandhandler.h"

// system includes
#include <boost/tokenizer.hpp>

//---------------------------------------------------------------------------
// Underlying registry for command handlers, not directly accessible.
//---------------------------------------------------------------------------

class LLCommandHandlerRegistry
{
public:
        static LLCommandHandlerRegistry& instance();
        void add(const char* cmd, LLCommandHandler* handler);
        bool dispatch(const std::string& cmd, const std::vector<std::string>& params);

private:
        std::map<std::string, LLCommandHandler*> mMap;
};

// static 
LLCommandHandlerRegistry& LLCommandHandlerRegistry::instance()
{
        // Force this to be initialized on first call, because we're going
        // to be adding items to the std::map before main() and we can't
        // rely on a global being initialized in the right order.
        static LLCommandHandlerRegistry instance;
        return instance;
}

void LLCommandHandlerRegistry::add(const char* cmd, LLCommandHandler* handler)
{
        mMap[cmd] = handler;
}

bool LLCommandHandlerRegistry::dispatch(const std::string& cmd,
                                                                                const std::vector<std::string>& params)
{
        std::map<std::string, LLCommandHandler*>::iterator it = mMap.find(cmd);
        if (it == mMap.end()) return false;
        LLCommandHandler* handler = it->second;
        if (!handler) return false;
        return handler->handle(params);
}

//---------------------------------------------------------------------------
// Automatic registration of commands, runs before main()
//---------------------------------------------------------------------------

LLCommandHandler::LLCommandHandler(const char* cmd)
{
        LLCommandHandlerRegistry::instance().add(cmd, this);
}

LLCommandHandler::~LLCommandHandler()
{
        // Don't care about unregistering these, all the handlers
        // should be static objects.
}

//---------------------------------------------------------------------------
// Public interface
//---------------------------------------------------------------------------

// static
bool LLCommandDispatcher::dispatch(const std::string& cmd, const std::vector<std::string>& params)
{
        return LLCommandHandlerRegistry::instance().dispatch(cmd, params);
}

---