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#include "helper-observer.h"
#include "object/sp-object.h"
namespace Inkscape {
namespace XML {
// Very simple observer that just emits a signal if anything happens to a node
SignalObserver::SignalObserver()
: _oldsel(NULL)
{}
SignalObserver::~SignalObserver()
{
set(NULL); // if _oldsel!=nullptr, remove observer and decrease refcount
}
// Add this observer to the SPObject and remove it from any previous object
void SignalObserver::set(SPObject* o)
{
// XML Tree being used direcly in this function in the following code
// while it shouldn't be
// Pointer to object is stored, so refcounting should be increased/decreased
if(_oldsel) {
if (_oldsel->getRepr()) {
_oldsel->getRepr()->removeObserver(*this);
}
sp_object_unref(_oldsel);
_oldsel = NULL;
}
if(o) {
if (o->getRepr()) {
o->getRepr()->addObserver(*this);
sp_object_ref(o);
_oldsel = o;
}
}
}
void SignalObserver::notifyChildAdded(XML::Node&, XML::Node&, XML::Node*)
{ signal_changed()(); }
void SignalObserver::notifyChildRemoved(XML::Node&, XML::Node&, XML::Node*)
{ signal_changed()(); }
void SignalObserver::notifyChildOrderChanged(XML::Node&, XML::Node&, XML::Node*, XML::Node*)
{ signal_changed()(); }
void SignalObserver::notifyContentChanged(XML::Node&, Util::ptr_shared, Util::ptr_shared)
{}
void SignalObserver::notifyAttributeChanged(XML::Node&, GQuark, Util::ptr_shared, Util::ptr_shared)
{ signal_changed()(); }
sigc::signal<void>& SignalObserver::signal_changed()
{
return _signal_changed;
}
} //namespace XML
} //namespace Inkscape
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