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/* signalproxy.cc
*
* Copyright (C) 2002 The gtkmm Development Team
*
* 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; either
* version 2.1 of the License, or (at your option) any later version.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include <glib-object.h>
#include <glibmm/exceptionhandler.h>
#include <glibmm/object.h>
#include <glibmm/signalproxy.h>
namespace
{
extern "C"
{
// From functions with C linkage to public static member functions with C++ linkage
static void SignalProxyNormal_slot0_void_callback(GObject* self, void* data)
{
Glib::SignalProxyNormal::slot0_void_callback(self, data);
}
static void SignalProxyConnectionNode_destroy_notify_handler(gpointer data, GClosure* closure)
{
Glib::SignalProxyConnectionNode::destroy_notify_handler(data, closure);
}
} // extern "C"
} // anonymous namespace
namespace Glib
{
// SignalProxyBase implementation:
SignalProxyBase::SignalProxyBase(Glib::ObjectBase* obj) : obj_(obj)
{
}
// SignalProxyNormal implementation:
SignalProxyNormal::SignalProxyNormal(Glib::ObjectBase* obj, const SignalProxyInfo* info)
: SignalProxyBase(obj), info_(info)
{
}
SignalProxyNormal::~SignalProxyNormal() noexcept
{
}
sigc::slot_base&
SignalProxyNormal::connect_impl_(bool notify, const sigc::slot_base& slot, bool after)
{
GCallback c_handler = notify ? info_->notify_callback : info_->callback;
if (c_handler == (GCallback)&slot0_void_callback)
// Callback via a function with C linkage.
c_handler = (GCallback)&SignalProxyNormal_slot0_void_callback;
// create a proxy to hold our connection info
auto pConnectionNode = new SignalProxyConnectionNode(slot, obj_->gobj());
// connect it to glib
// pConnectionNode will be passed in the data argument to the callback.
pConnectionNode->connection_id_ = g_signal_connect_data(obj_->gobj(), info_->signal_name,
c_handler, pConnectionNode, &SignalProxyConnectionNode_destroy_notify_handler,
static_cast<GConnectFlags>(after ? G_CONNECT_AFTER : 0));
return pConnectionNode->slot_;
}
sigc::slot_base&
SignalProxyNormal::connect_impl_(bool notify, sigc::slot_base&& slot, bool after)
{
GCallback c_handler = notify ? info_->notify_callback : info_->callback;
if (c_handler == (GCallback)&slot0_void_callback)
// Callback via a function with C linkage.
c_handler = (GCallback)&SignalProxyNormal_slot0_void_callback;
// create a proxy to hold our connection info
auto pConnectionNode = new SignalProxyConnectionNode(std::move(slot), obj_->gobj());
// connect it to glib
// pConnectionNode will be passed in the data argument to the callback.
pConnectionNode->connection_id_ = g_signal_connect_data(obj_->gobj(), info_->signal_name,
c_handler, pConnectionNode, &SignalProxyConnectionNode_destroy_notify_handler,
static_cast<GConnectFlags>(after ? G_CONNECT_AFTER : 0));
return pConnectionNode->slot_;
}
void
SignalProxyNormal::emission_stop()
{
g_signal_stop_emission_by_name(obj_->gobj(), info_->signal_name);
}
// static
void
SignalProxyNormal::slot0_void_callback(GObject* self, void* data)
{
// Do not try to call a signal on a disassociated wrapper.
if (Glib::ObjectBase::_get_current_wrapper(self))
{
try
{
if (sigc::slot_base* const slot = data_to_slot(data))
(*static_cast<sigc::slot<void()>*>(slot))();
}
catch (...)
{
Glib::exception_handlers_invoke();
}
}
}
// SignalProxyDetailedBase implementation:
SignalProxyDetailedBase::SignalProxyDetailedBase(
Glib::ObjectBase* obj, const SignalProxyInfo* info, const Glib::ustring& detail_name)
: SignalProxyBase(obj),
info_(info),
detailed_name_(Glib::ustring(info->signal_name) +
(detail_name.empty() ? Glib::ustring() : ("::" + detail_name)))
{
}
SignalProxyDetailedBase::~SignalProxyDetailedBase() noexcept
{
}
sigc::slot_base&
SignalProxyDetailedBase::connect_impl_(bool notify, const sigc::slot_base& slot, bool after)
{
GCallback c_handler = notify ? info_->notify_callback : info_->callback;
if (c_handler == (GCallback)&SignalProxyNormal::slot0_void_callback)
// Callback via a function with C linkage.
c_handler = (GCallback)&SignalProxyNormal_slot0_void_callback;
// create a proxy to hold our connection info
auto pConnectionNode = new SignalProxyConnectionNode(slot, obj_->gobj());
// connect it to glib
// pConnectionNode will be passed in the data argument to the callback.
pConnectionNode->connection_id_ = g_signal_connect_data(obj_->gobj(), detailed_name_.c_str(),
c_handler, pConnectionNode, &SignalProxyConnectionNode_destroy_notify_handler,
static_cast<GConnectFlags>(after ? G_CONNECT_AFTER : 0));
return pConnectionNode->slot_;
}
sigc::slot_base&
SignalProxyDetailedBase::connect_impl_(bool notify, sigc::slot_base&& slot, bool after)
{
GCallback c_handler = notify ? info_->notify_callback : info_->callback;
if (c_handler == (GCallback)&SignalProxyNormal::slot0_void_callback)
// Callback via a function with C linkage.
c_handler = (GCallback)&SignalProxyNormal_slot0_void_callback;
// create a proxy to hold our connection info
auto pConnectionNode = new SignalProxyConnectionNode(std::move(slot), obj_->gobj());
// connect it to glib
// pConnectionNode will be passed in the data argument to the callback.
pConnectionNode->connection_id_ = g_signal_connect_data(obj_->gobj(), detailed_name_.c_str(),
c_handler, pConnectionNode, &SignalProxyConnectionNode_destroy_notify_handler,
static_cast<GConnectFlags>(after ? G_CONNECT_AFTER : 0));
return pConnectionNode->slot_;
}
void
SignalProxyDetailedBase::emission_stop()
{
g_signal_stop_emission_by_name(obj_->gobj(), detailed_name_.c_str());
}
} // namespace Glib
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