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/**
* Convenience base class for XML::NodeObservers that need to extract data
* from an XMLNodeTracker and queue up added or removed nodes for later
* processing
*
* Authors:
* David Yip <yipdw@rose-hulman.edu>
*
* Copyright (c) 2005 Authors
*
* Released under GNU GPL, read the file 'COPYING' for more information
*/
#ifndef __WHITEBOARD_NODE_TRACKER_OBSERVER_H__
#define __WHITEBOARD_NODE_TRACKER_OBSERVER_H__
#include "xml/node-observer.h"
#include "jabber_whiteboard/node-tracker-event-tracker.h"
#include "jabber_whiteboard/node-tracker.h"
#include "jabber_whiteboard/typedefs.h"
namespace Inkscape {
namespace XML {
class Node;
}
namespace Whiteboard {
class NodeTrackerObserver : public XML::NodeObserver {
public:
NodeTrackerObserver(XMLNodeTracker* xnt) : _xnt(xnt) { }
virtual ~NodeTrackerObserver() { }
// just reinforce the fact that we don't implement any of the
// notification methods here
virtual void notifyChildAdded(XML::Node &node, XML::Node &child, XML::Node *prev)=0;
virtual void notifyChildRemoved(XML::Node &node, XML::Node &child, XML::Node *prev)=0;
virtual void notifyChildOrderChanged(XML::Node &node, XML::Node &child,
XML::Node *old_prev, XML::Node *new_prev)=0;
virtual void notifyContentChanged(XML::Node &node,
Util::shared_ptr<char> old_content,
Util::shared_ptr<char> new_content)=0;
virtual void notifyAttributeChanged(XML::Node &node, GQuark name,
Util::shared_ptr<char> old_value,
Util::shared_ptr<char> new_value)=0;
// ...but we do provide node tracking facilities
KeyToNodeActionList& getNodeTrackerActions()
{
return this->newnodes;
}
KeyToNodeActionList getNodeTrackerActionsCopy()
{
return this->newnodes;
}
void clearNodeBuffers()
{
this->newnodes.clear();
this->newkeys.clear();
this->actions.clear();
}
protected:
std::string _findOrGenerateNodeID(XML::Node& node)
{
NodeToKeyMap::iterator i = newkeys.find(&node);
if (i != newkeys.end()) {
// g_log(NULL, G_LOG_LEVEL_DEBUG, "Found key for %p (local): %s", &node, i->second.c_str());
return i->second;
} else {
std::string nodeid = this->_xnt->get(node);
if (nodeid.empty()) {
// g_log(NULL, G_LOG_LEVEL_DEBUG, "Generating key for %p", &node);
return this->_xnt->generateKey();
} else {
// g_log(NULL, G_LOG_LEVEL_DEBUG, "Found key for %p (tracker): %s", &node, nodeid.c_str());
return nodeid;
}
}
}
KeyToNodeActionList newnodes;
NodeTrackerEventTracker actions;
NodeToKeyMap newkeys;
XMLNodeTracker* _xnt;
private:
// noncopyable, nonassignable
NodeTrackerObserver(NodeTrackerObserver const& other);
NodeTrackerObserver& operator=(NodeTrackerObserver const& other);
};
}
}
#endif
/*
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:encoding=utf-8:textwidth=99 :
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