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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#ifndef I_GAME_COMMANDS_H
#define I_GAME_COMMANDS_H
#include "System/StringUtil.h"
// These two are required for the destructors
#include "SyncedActionExecutor.h"
#include "UnsyncedActionExecutor.h"
#include "WordCompletion.h"
#include <map>
#include <string>
#include <stdexcept>
template<class actionExecutor_t>
class IGameCommands
{
protected:
IGameCommands() {}
virtual ~IGameCommands();
public:
typedef std::map<std::string, actionExecutor_t*> actionExecutorsMap_t;
/**
* Registers the default action-executors for chat commands.
* These are all the ones that are not logically tied to a specific
* part/sub-module of the engine (for example rendering related switches).
* @see AddActionExecutor
*/
virtual void AddDefaultActionExecutors() = 0;
/**
* Registers a new action-executor for a chat command.
* @param executor has to be new'ed, will be delete'ed internally.
* @see RemoveActionExecutor
*/
void AddActionExecutor(actionExecutor_t* executor);
/**
* Deregisters an action-executor for a chat command.
* The action-executor corresponding to the given command
* (case-insensitive) will be removed and delete'ed internally.
* @param command used to lookup the action-executor to be removed.
* @see AddActionExecutor
*/
void RemoveActionExecutor(const std::string& command);
/**
* Deregisters all currently registered action-executor for chat commands.
* @see RemoveActionExecutor
*/
void RemoveAllActionExecutors();
/**
* Returns the action-executor for the given command (case-insensitive).
* @param command used to lookup the action-executor to be removed.
* @return the action-executor for the given command, or NULL, if none is
* registered.
*/
const actionExecutor_t* GetActionExecutor(const std::string& command) const;
/**
* Returns the map of currently registered lower-case commands with their
* respective action-executors.
*/
const actionExecutorsMap_t& GetActionExecutors() const { return actionExecutors; }
private:
// XXX maybe use a hash_map here, for faster lookup
actionExecutorsMap_t actionExecutors;
};
/*
* Because this is a template enabled class,
* the implementations have to be in the same file.
*/
template<class actionExecutor_t>
IGameCommands<actionExecutor_t>::~IGameCommands() {
RemoveAllActionExecutors();
}
template<class actionExecutor_t>
void IGameCommands<actionExecutor_t>::AddActionExecutor(actionExecutor_t* executor) {
const std::string commandLower = StringToLower(executor->GetCommand());
const typename actionExecutorsMap_t::const_iterator aei
= actionExecutors.find(commandLower);
if (aei != actionExecutors.end()) {
throw std::logic_error("Tried to register a duplicate action-executor for command: " + commandLower);
} else {
actionExecutors[commandLower] = executor;
wordCompletion->AddWord("/" + commandLower + " ", true, false, false);
}
}
template<class actionExecutor_t>
void IGameCommands<actionExecutor_t>::RemoveActionExecutor(const std::string& command) {
const std::string commandLower = StringToLower(command);
const typename actionExecutorsMap_t::iterator aei
= actionExecutors.find(commandLower);
if (aei != actionExecutors.end()) {
// an executor for this command is registered
// -> remove and delete
actionExecutor_t* executor = aei->second;
actionExecutors.erase(aei);
wordCompletion->RemoveWord("/" + commandLower + " ");
delete executor;
}
}
template<class actionExecutor_t>
void IGameCommands<actionExecutor_t>::RemoveAllActionExecutors() {
while (!actionExecutors.empty()) {
RemoveActionExecutor(actionExecutors.begin()->first);
}
}
template<class actionExecutor_t>
const actionExecutor_t* IGameCommands<actionExecutor_t>::GetActionExecutor(const std::string& command) const {
const actionExecutor_t* executor = NULL;
const std::string commandLower = StringToLower(command);
const typename actionExecutorsMap_t::const_iterator aei
= actionExecutors.find(commandLower);
if (aei != actionExecutors.end()) {
// an executor for this command is registered
executor = aei->second;
}
return executor;
}
#endif // I_GAME_COMMANDS_H
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