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-rw-r--r--indra/llxuixml/llregistry.h351
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diff --git a/indra/llxuixml/llregistry.h b/indra/llxuixml/llregistry.h
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--- a/indra/llxuixml/llregistry.h
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-/**
- * @file llregistry.h
- * @brief template classes for registering name, value pairs in nested scopes, statically, etc.
- *
- * $LicenseInfo:firstyear=2001&license=viewerlgpl$
- * Second Life Viewer Source Code
- * Copyright (C) 2010, Linden Research, Inc.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation;
- * version 2.1 of the License only.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- *
- * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
- * $/LicenseInfo$
- */
-
-#ifndef LL_LLREGISTRY_H
-#define LL_LLREGISTRY_H
-
-#include <list>
-
-#include <boost/type_traits.hpp>
-#include "llsingleton.h"
-
-template <typename T>
-class LLRegistryDefaultComparator
-{
- bool operator()(const T& lhs, const T& rhs) { return lhs < rhs; }
-};
-
-template <typename KEY, typename VALUE, typename COMPARATOR = LLRegistryDefaultComparator<KEY> >
-class LLRegistry
-{
-public:
- typedef LLRegistry<KEY, VALUE, COMPARATOR> registry_t;
- typedef typename boost::add_reference<typename boost::add_const<KEY>::type>::type ref_const_key_t;
- typedef typename boost::add_reference<typename boost::add_const<VALUE>::type>::type ref_const_value_t;
- typedef typename boost::add_reference<VALUE>::type ref_value_t;
- typedef typename boost::add_pointer<typename boost::add_const<VALUE>::type>::type ptr_const_value_t;
- typedef typename boost::add_pointer<VALUE>::type ptr_value_t;
-
- class Registrar
- {
- friend class LLRegistry<KEY, VALUE, COMPARATOR>;
- public:
- typedef typename std::map<KEY, VALUE> registry_map_t;
-
- bool add(ref_const_key_t key, ref_const_value_t value)
- {
- if (mMap.insert(std::make_pair(key, value)).second == false)
- {
- llwarns << "Tried to register " << key << " but it was already registered!" << llendl;
- return false;
- }
- return true;
- }
-
- void remove(ref_const_key_t key)
- {
- mMap.erase(key);
- }
-
- void replace(ref_const_key_t key, ref_const_value_t value)
- {
- mMap[key] = value;
- }
-
- typename registry_map_t::const_iterator beginItems() const
- {
- return mMap.begin();
- }
-
- typename registry_map_t::const_iterator endItems() const
- {
- return mMap.end();
- }
-
- protected:
- ptr_value_t getValue(ref_const_key_t key)
- {
- typename registry_map_t::iterator found_it = mMap.find(key);
- if (found_it != mMap.end())
- {
- return &(found_it->second);
- }
- return NULL;
- }
-
- ptr_const_value_t getValue(ref_const_key_t key) const
- {
- typename registry_map_t::const_iterator found_it = mMap.find(key);
- if (found_it != mMap.end())
- {
- return &(found_it->second);
- }
- return NULL;
- }
-
- // if the registry is used to store pointers, and null values are valid entries
- // then use this function to check the existence of an entry
- bool exists(ref_const_key_t key) const
- {
- return mMap.find(key) != mMap.end();
- }
-
- bool empty() const
- {
- return mMap.empty();
- }
-
- protected:
- // use currentRegistrar() or defaultRegistrar()
- Registrar() {}
- ~Registrar() {}
-
- private:
- registry_map_t mMap;
- };
-
- typedef typename std::list<Registrar*> scope_list_t;
- typedef typename std::list<Registrar*>::iterator scope_list_iterator_t;
- typedef typename std::list<Registrar*>::const_iterator scope_list_const_iterator_t;
-
- LLRegistry()
- {}
-
- ~LLRegistry() {}
-
- ptr_value_t getValue(ref_const_key_t key)
- {
- for(scope_list_iterator_t it = mActiveScopes.begin();
- it != mActiveScopes.end();
- ++it)
- {
- ptr_value_t valuep = (*it)->getValue(key);
- if (valuep != NULL) return valuep;
- }
- return mDefaultRegistrar.getValue(key);
- }
-
- ptr_const_value_t getValue(ref_const_key_t key) const
- {
- for(scope_list_const_iterator_t it = mActiveScopes.begin();
- it != mActiveScopes.end();
- ++it)
- {
- ptr_value_t valuep = (*it)->getValue(key);
- if (valuep != NULL) return valuep;
- }
- return mDefaultRegistrar.getValue(key);
- }
-
- bool exists(ref_const_key_t key) const
- {
- for(scope_list_const_iterator_t it = mActiveScopes.begin();
- it != mActiveScopes.end();
- ++it)
- {
- if ((*it)->exists(key)) return true;
- }
-
- return mDefaultRegistrar.exists(key);
- }
-
- bool empty() const
- {
- for(scope_list_const_iterator_t it = mActiveScopes.begin();
- it != mActiveScopes.end();
- ++it)
- {
- if (!(*it)->empty()) return false;
- }
-
- return mDefaultRegistrar.empty();
- }
-
-
- Registrar& defaultRegistrar()
- {
- return mDefaultRegistrar;
- }
-
- const Registrar& defaultRegistrar() const
- {
- return mDefaultRegistrar;
- }
-
-
- Registrar& currentRegistrar()
- {
- if (!mActiveScopes.empty())
- {
- return *mActiveScopes.front();
- }
-
- return mDefaultRegistrar;
- }
-
- const Registrar& currentRegistrar() const
- {
- if (!mActiveScopes.empty())
- {
- return *mActiveScopes.front();
- }
-
- return mDefaultRegistrar;
- }
-
-
-protected:
- void addScope(Registrar* scope)
- {
- // newer scopes go up front
- mActiveScopes.insert(mActiveScopes.begin(), scope);
- }
-
- void removeScope(Registrar* scope)
- {
- // O(N) but should be near the beggining and N should be small and this is safer than storing iterators
- scope_list_iterator_t iter = std::find(mActiveScopes.begin(), mActiveScopes.end(), scope);
- if (iter != mActiveScopes.end())
- {
- mActiveScopes.erase(iter);
- }
- }
-
-private:
- scope_list_t mActiveScopes;
- Registrar mDefaultRegistrar;
-};
-
-template <typename KEY, typename VALUE, typename DERIVED_TYPE, typename COMPARATOR = LLRegistryDefaultComparator<KEY> >
-class LLRegistrySingleton
- : public LLRegistry<KEY, VALUE, COMPARATOR>,
- public LLSingleton<DERIVED_TYPE>
-{
- friend class LLSingleton<DERIVED_TYPE>;
-public:
- typedef LLRegistry<KEY, VALUE, COMPARATOR> registry_t;
- typedef const KEY& ref_const_key_t;
- typedef const VALUE& ref_const_value_t;
- typedef VALUE* ptr_value_t;
- typedef const VALUE* ptr_const_value_t;
- typedef LLSingleton<DERIVED_TYPE> singleton_t;
-
- class ScopedRegistrar : public registry_t::Registrar
- {
- public:
- ScopedRegistrar(bool push_scope = true)
- {
- if (push_scope)
- {
- pushScope();
- }
- }
-
- ~ScopedRegistrar()
- {
- if (!singleton_t::destroyed())
- {
- popScope();
- }
- }
-
- void pushScope()
- {
- singleton_t::instance().addScope(this);
- }
-
- void popScope()
- {
- singleton_t::instance().removeScope(this);
- }
-
- ptr_value_t getValueFromScope(ref_const_key_t key)
- {
- return getValue(key);
- }
-
- ptr_const_value_t getValueFromScope(ref_const_key_t key) const
- {
- return getValue(key);
- }
-
- private:
- typename std::list<typename registry_t::Registrar*>::iterator mListIt;
- };
-
- class StaticRegistrar : public registry_t::Registrar
- {
- public:
- virtual ~StaticRegistrar() {}
- StaticRegistrar(ref_const_key_t key, ref_const_value_t value)
- {
- singleton_t::instance().mStaticScope->add(key, value);
- }
- };
-
- // convenience functions
- typedef typename LLRegistry<KEY, VALUE, COMPARATOR>::Registrar& ref_registrar_t;
- static ref_registrar_t currentRegistrar()
- {
- return singleton_t::instance().registry_t::currentRegistrar();
- }
-
- static ref_registrar_t defaultRegistrar()
- {
- return singleton_t::instance().registry_t::defaultRegistrar();
- }
-
- static ptr_value_t getValue(ref_const_key_t key)
- {
- return singleton_t::instance().registry_t::getValue(key);
- }
-
-protected:
- // DERIVED_TYPE needs to derive from LLRegistrySingleton
- LLRegistrySingleton()
- : mStaticScope(NULL)
- {}
-
- virtual void initSingleton()
- {
- mStaticScope = new ScopedRegistrar();
- }
-
- virtual ~LLRegistrySingleton()
- {
- delete mStaticScope;
- }
-
-private:
- ScopedRegistrar* mStaticScope;
-};
-
-// helper macro for doing static registration
-#define GLUED_TOKEN(x, y) x ## y
-#define GLUE_TOKENS(x, y) GLUED_TOKEN(x, y)
-#define LLREGISTER_STATIC(REGISTRY, KEY, VALUE) static REGISTRY::StaticRegistrar GLUE_TOKENS(reg, __LINE__)(KEY, VALUE);
-
-#endif
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