/*
 * The reference corresponding to href of <tref> element.
 *
 * Copyright (C) 2007 Gail Banaszkiewicz
 * 
 * This file was created based on sp-use-reference.cpp
 *
 * Released under GNU GPL, read the file 'COPYING' for more information.
 */

//#include "enums.h"
#include "sp-tref-reference.h"

#include "sp-text.h"
#include "sp-tref.h"
#include "sp-tspan.h"



bool SPTRefReference::_acceptObject(SPObject * const obj) const
{
    SPObject *owner = getOwner();
    if (SP_IS_TREF(owner))
        return sp_tref_reference_allowed(SP_TREF(getOwner()), obj);
    else
        return false;
}


void SPTRefReference::updateObserver()
{
    SPObject *referred = getObject();
    
    if (referred) {
        if (subtreeObserved) {
            subtreeObserved->removeObserver(*this);
            delete subtreeObserved;   
        }
        
        subtreeObserved = new Inkscape::XML::Subtree(*SP_OBJECT_REPR(referred));
        subtreeObserved->addObserver(*this);
    }
}


void SPTRefReference::notifyChildAdded(Inkscape::XML::Node &node, Inkscape::XML::Node &child,
                                       Inkscape::XML::Node *prev)
{
    SPObject *owner = getOwner();
    
    if (owner && SP_IS_TREF(owner)) {
        sp_tref_update_text(SP_TREF(owner));
    }    
}


void SPTRefReference::notifyChildRemoved(Inkscape::XML::Node &node, Inkscape::XML::Node &child,
                                         Inkscape::XML::Node *prev)
{
    SPObject *owner = getOwner();
    
    if (owner && SP_IS_TREF(owner)) {
        sp_tref_update_text(SP_TREF(owner));
    }
}


void SPTRefReference::notifyChildOrderChanged(Inkscape::XML::Node &node, Inkscape::XML::Node &child,
                                              Inkscape::XML::Node *old_prev, Inkscape::XML::Node *new_prev)
{
    SPObject *owner = getOwner();
    
    if (owner && SP_IS_TREF(owner)) {
        sp_tref_update_text(SP_TREF(owner));
    }
}
 
                                        
void SPTRefReference::notifyContentChanged(Inkscape::XML::Node &node,
                                           Inkscape::Util::ptr_shared<char> old_content,
                                           Inkscape::Util::ptr_shared<char> new_content)
{
    SPObject *owner = getOwner();
    
    if (owner && SP_IS_TREF(owner)) {
        sp_tref_update_text(SP_TREF(owner));
    }
}


void SPTRefReference::notifyAttributeChanged(Inkscape::XML::Node &node, GQuark name,
                                             Inkscape::Util::ptr_shared<char> old_value,
                                             Inkscape::Util::ptr_shared<char> new_value)
{
    // Do nothing - tref only cares about textual content
}


/*
  Local Variables:
  mode:c++
  c-file-style:"stroustrup"
  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
  indent-tabs-mode:nil
  fill-column:99
  End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :