diff options
Diffstat (limited to 'indra/llcommon')
| -rw-r--r-- | indra/llcommon/CMakeLists.txt | 2 | ||||
| -rw-r--r-- | indra/llcommon/llevents.h | 70 | ||||
| -rw-r--r-- | indra/llcommon/lllistenerwrapper.h | 198 |
3 files changed, 1 insertions, 269 deletions
diff --git a/indra/llcommon/CMakeLists.txt b/indra/llcommon/CMakeLists.txt index d237985b04..035b379246 100644 --- a/indra/llcommon/CMakeLists.txt +++ b/indra/llcommon/CMakeLists.txt @@ -1,4 +1,3 @@ - # -*- cmake -*- project(llcommon) @@ -185,7 +184,6 @@ set(llcommon_HEADER_FILES llkeythrottle.h llleap.h llleaplistener.h - lllistenerwrapper.h llliveappconfig.h lllivefile.h llmainthreadtask.h diff --git a/indra/llcommon/llevents.h b/indra/llcommon/llevents.h index 18525a8fa5..253592256d 100644 --- a/indra/llcommon/llevents.h +++ b/indra/llcommon/llevents.h @@ -814,62 +814,6 @@ private: LL_COMMON_API bool sendReply(const LLSD& reply, const LLSD& request, const std::string& replyKey="reply"); -/** - * Base class for LLListenerWrapper. See visit_and_connect() and llwrap(). We - * provide virtual @c accept_xxx() methods, customization points allowing a - * subclass access to certain data visible at LLEventPump::listen() time. - * Example subclass usage: - * - * @code - * myEventPump.listen("somename", - * llwrap<MyListenerWrapper>(boost::bind(&MyClass::method, instance, _1))); - * @endcode - * - * Because of the anticipated usage (note the anonymous temporary - * MyListenerWrapper instance in the example above), the @c accept_xxx() - * methods must be @c const. - */ -class LL_COMMON_API LLListenerWrapperBase -{ -public: - /// New instance. The accept_xxx() machinery makes it important to use - /// shared_ptrs for our data. Many copies of this object are made before - /// the instance that actually ends up in the signal, yet accept_xxx() - /// will later be called on the @em original instance. All copies of the - /// same original instance must share the same data. - LLListenerWrapperBase(): - mName(new std::string), - mConnection(new LLBoundListener) - { - } - - /// Copy constructor. Copy shared_ptrs to original instance data. - LLListenerWrapperBase(const LLListenerWrapperBase& that): - mName(that.mName), - mConnection(that.mConnection) - { - } - virtual ~LLListenerWrapperBase() {} - - /// Ask LLEventPump::listen() for the listener name - virtual void accept_name(const std::string& name) const - { - *mName = name; - } - - /// Ask LLEventPump::listen() for the new connection - virtual void accept_connection(const LLBoundListener& connection) const - { - *mConnection = connection; - } - -protected: - /// Listener name. - boost::shared_ptr<std::string> mName; - /// Connection. - boost::shared_ptr<LLBoundListener> mConnection; -}; - /***************************************************************************** * Underpinnings *****************************************************************************/ @@ -1121,19 +1065,7 @@ namespace LLEventDetail // Boost.Signals, in case we were passed a boost::ref(). visit_each(visitor, LLEventDetail::unwrap(raw_listener)); // Make the connection using passed function. - LLBoundListener connection(connect_func(listener)); - // If the LISTENER is an LLListenerWrapperBase subclass, pass it the - // desired information. It's important that we pass the raw_listener - // so the compiler can make decisions based on its original type. - const LLListenerWrapperBase* lwb = - ll_template_cast<const LLListenerWrapperBase*>(&raw_listener); - if (lwb) - { - lwb->accept_name(name); - lwb->accept_connection(connection); - } - // In any case, show new connection to caller. - return connection; + return connect_func(listener); } } // namespace LLEventDetail diff --git a/indra/llcommon/lllistenerwrapper.h b/indra/llcommon/lllistenerwrapper.h deleted file mode 100644 index 09d074abca..0000000000 --- a/indra/llcommon/lllistenerwrapper.h +++ /dev/null @@ -1,198 +0,0 @@ -/** - * @file lllistenerwrapper.h - * @author Nat Goodspeed - * @date 2009-11-30 - * @brief Introduce LLListenerWrapper template - * - * $LicenseInfo:firstyear=2009&license=viewerlgpl$ - * 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 - * $/LicenseInfo$ - */ - -#if ! defined(LL_LLLISTENERWRAPPER_H) -#define LL_LLLISTENERWRAPPER_H - -#include "llevents.h" // LLListenerWrapperBase -#include <boost/visit_each.hpp> - -/** - * Template base class for coding wrappers for LLEventPump listeners. - * - * Derive your listener wrapper from LLListenerWrapper. You must use - * LLLISTENER_WRAPPER_SUBCLASS() so your subclass will play nicely with - * boost::visit_each (q.v.). That way boost::signals2 can still detect - * derivation from LLEventTrackable, and so forth. - */ -template <typename LISTENER> -class LLListenerWrapper: public LLListenerWrapperBase -{ -public: - /// Wrap an arbitrary listener object - LLListenerWrapper(const LISTENER& listener): - mListener(listener) - {} - - /// call - virtual bool operator()(const LLSD& event) - { - return mListener(event); - } - - /// Allow boost::visit_each() to peek at our mListener. - template <class V> - void accept_visitor(V& visitor) const - { - using boost::visit_each; - visit_each(visitor, mListener, 0); - } - -private: - LISTENER mListener; -}; - -/** - * Specialize boost::visit_each() (leveraging ADL) to peek inside an - * LLListenerWrapper<T> to traverse its LISTENER. We borrow the - * accept_visitor() pattern from boost::bind(), avoiding the need to make - * mListener public. - */ -template <class V, typename T> -void visit_each(V& visitor, const LLListenerWrapper<T>& wrapper, int) -{ - wrapper.accept_visitor(visitor); -} - -/// use this (sigh!) for each subclass of LLListenerWrapper<T> you write -#define LLLISTENER_WRAPPER_SUBCLASS(CLASS) \ -template <class V, typename T> \ -void visit_each(V& visitor, const CLASS<T>& wrapper, int) \ -{ \ - visit_each(visitor, static_cast<const LLListenerWrapper<T>&>(wrapper), 0); \ -} \ - \ -/* Have to state this explicitly, rather than using LL_TEMPLATE_CONVERTIBLE, */ \ -/* because the source type is itself a template. */ \ -template <typename T> \ -struct ll_template_cast_impl<const LLListenerWrapperBase*, const CLASS<T>*> \ -{ \ - const LLListenerWrapperBase* operator()(const CLASS<T>* wrapper) \ - { \ - return wrapper; \ - } \ -} - -/** - * Make an instance of a listener wrapper. Every wrapper class must be a - * template accepting a listener object of arbitrary type. In particular, the - * type of a boost::bind() expression is deliberately undocumented. So we - * can't just write Wrapper<CorrectType>(boost::bind(...)). Instead we must - * write llwrap<Wrapper>(boost::bind(...)). - */ -template <template<typename> class WRAPPER, typename T> -WRAPPER<T> llwrap(const T& listener) -{ - return WRAPPER<T>(listener); -} - -/** - * This LLListenerWrapper template subclass is used to report entry/exit to an - * event listener, by changing this: - * @code - * someEventPump.listen("MyClass", - * boost::bind(&MyClass::method, ptr, _1)); - * @endcode - * to this: - * @code - * someEventPump.listen("MyClass", - * llwrap<LLCoutListener>( - * boost::bind(&MyClass::method, ptr, _1))); - * @endcode - */ -template <class LISTENER> -class LLCoutListener: public LLListenerWrapper<LISTENER> -{ - typedef LLListenerWrapper<LISTENER> super; - -public: - /// Wrap an arbitrary listener object - LLCoutListener(const LISTENER& listener): - super(listener) - {} - - /// call - virtual bool operator()(const LLSD& event) - { - std::cout << "Entering listener " << *super::mName << " with " << event << std::endl; - bool handled = super::operator()(event); - std::cout << "Leaving listener " << *super::mName; - if (handled) - { - std::cout << " (handled)"; - } - std::cout << std::endl; - return handled; - } -}; - -LLLISTENER_WRAPPER_SUBCLASS(LLCoutListener); - -/** - * This LLListenerWrapper template subclass is used to log entry/exit to an - * event listener, by changing this: - * @code - * someEventPump.listen("MyClass", - * boost::bind(&MyClass::method, ptr, _1)); - * @endcode - * to this: - * @code - * someEventPump.listen("MyClass", - * llwrap<LLLogListener>( - * boost::bind(&MyClass::method, ptr, _1))); - * @endcode - */ -template <class LISTENER> -class LLLogListener: public LLListenerWrapper<LISTENER> -{ - typedef LLListenerWrapper<LISTENER> super; - -public: - /// Wrap an arbitrary listener object - LLLogListener(const LISTENER& listener): - super(listener) - {} - - /// call - virtual bool operator()(const LLSD& event) - { - LL_DEBUGS("LLLogListener") << "Entering listener " << *super::mName << " with " << event << LL_ENDL; - bool handled = super::operator()(event); - LL_DEBUGS("LLLogListener") << "Leaving listener " << *super::mName; - if (handled) - { - LL_CONT << " (handled)"; - } - LL_CONT << LL_ENDL; - return handled; - } -}; - -LLLISTENER_WRAPPER_SUBCLASS(LLLogListener); - -#endif /* ! defined(LL_LLLISTENERWRAPPER_H) */ |