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/**
* Undo / redo / undo log commit listener
*
* Authors:
* David Yip <yipdw@rose-hulman.edu>
*
* Copyright (c) 2005 Authors
*
* Released under GNU GPL, read the file 'COPYING' for more information
*/
#include "document.h"
#include "document-private.h"
#include "xml/event.h"
#include "xml/event-fns.h"
#include "undo-stack-observer.h"
#include "util/list.h"
#include "util/reverse-list.h"
#include "jabber_whiteboard/defines.h"
#include "jabber_whiteboard/session-manager.h"
#include "jabber_whiteboard/node-tracker.h"
#include "jabber_whiteboard/serializer.h"
#include "jabber_whiteboard/message-utilities.h"
#include "jabber_whiteboard/message-aggregator.h"
#include "jabber_whiteboard/message-tags.h"
#include <glibmm.h>
namespace Inkscape {
namespace Whiteboard {
UndoStackObserver::UndoStackObserver(SessionManager* sm) : _sm(sm), _undoSendEventLocks(0), _redoSendEventLocks(0), _undoCommitSendEventLocks(0) {
}
UndoStackObserver::~UndoStackObserver() { }
void
UndoStackObserver::notifyUndoEvent(XML::Event* log)
{
if (this->_undoSendEventLocks == 0) {
bool chatroom = this->_sm->session_data->status.test(IN_CHATROOM);
Glib::ustring commit = MessageUtilities::makeTagWithContent(MESSAGE_UNDO, "");
this->_sm->sendChange(commit, CHANGE_COMMIT, "", chatroom);
}
// Retrieve and process added/deleted nodes in the undo log
// TODO: re-enable; right now it doesn't work because we can't recover the names
// of deleted nodes (although perhaps creating a subclass of XML::Event that stored
// names of serialized nodes along with all other Event information would fix this)
/*
KeyToNodeActionMap node_actions = this->_action_observer.getNodeActionMap();
this->_sm->node_tracker()->process(node_actions);
this->_action_observer.clearNodeBuffers();
*/
}
void
UndoStackObserver::notifyRedoEvent(XML::Event* log)
{
if (this->_redoSendEventLocks == 0) {
bool chatroom = this->_sm->session_data->status.test(IN_CHATROOM);
Glib::ustring commit = MessageUtilities::makeTagWithContent(MESSAGE_REDO, "");
this->_sm->sendChange(commit, CHANGE_COMMIT, "", chatroom);
}
// Retrieve and process added/deleted nodes in the redo log
/*
KeyToNodeActionMap node_actions = this->_action_observer.getNodeActionMap();
this->_sm->node_tracker()->process(node_actions);
this->_action_observer.clearNodeBuffers();
*/
}
void
UndoStackObserver::notifyUndoCommitEvent(XML::Event* log)
{
if (this->_undoCommitSendEventLocks == 0) {
this->_doAction(log);
}
}
void
UndoStackObserver::lockObserverFromSending(ObserverType type)
{
switch (type) {
case UNDO_EVENT:
++this->_undoSendEventLocks;
break;
case REDO_EVENT:
++this->_redoSendEventLocks;
break;
case UNDO_COMMIT_EVENT:
++this->_undoCommitSendEventLocks;
break;
default:
break;
}
}
void
UndoStackObserver::unlockObserverFromSending(ObserverType type)
{
switch(type) {
case UNDO_EVENT:
if (this->_undoSendEventLocks) {
--this->_undoSendEventLocks;
}
break;
case REDO_EVENT:
if (this->_redoSendEventLocks) {
--this->_redoSendEventLocks;
}
break;
case UNDO_COMMIT_EVENT:
if (this->_undoCommitSendEventLocks) {
--this->_undoCommitSendEventLocks;
}
break;
default:
break;
}
}
void
UndoStackObserver::_doAction(XML::Event* log)
{
if (this->_sm->serializer()) {
bool chatroom = this->_sm->session_data->status.test(IN_CHATROOM);
XML::replay_log_to_observer(log, *this->_sm->serializer());
this->_sm->serializer()->synthesizeChildNodeAddEvents();
SerializedEventList& events = this->_sm->serializer()->getEventList();
SerializedEventList::iterator i = events.begin();
MessageAggregator& agg = MessageAggregator::instance();
Glib::ustring msgbuf;
while(i != events.end()) {
while(agg.addOne(*i++, msgbuf)) {
if (i == events.end()) {
break;
}
}
if (i != events.end()) {
i--;
}
this->_sm->sendChange(msgbuf, CHANGE_REPEATABLE, "", chatroom);
msgbuf.clear();
}
KeyToNodeActionList& node_actions = this->_sm->serializer()->getNodeTrackerActions();
this->_sm->node_tracker()->process(node_actions);
this->_sm->serializer()->reset();
Glib::ustring commit = MessageUtilities::makeTagWithContent(MESSAGE_COMMIT, "");
this->_sm->sendChange(commit, CHANGE_COMMIT, "", chatroom);
}
}
}
}
/*
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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