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livetrax/libs/pbd3/undo.cc

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/*
Copyright (C) 2001 Brett Viren & Paul Davis
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
$Id$
*/
#include <iostream>
#include <pbd/undo.h>
using namespace std;
using namespace sigc;
UndoTransaction::UndoTransaction ()
{
}
UndoTransaction::UndoTransaction (const UndoTransaction& rhs)
{
_name = rhs._name;
clear ();
actions.insert(actions.end(),rhs.actions.begin(),rhs.actions.end());
}
UndoTransaction&
UndoTransaction::operator= (const UndoTransaction& rhs)
{
if (this == &rhs) return *this;
_name = rhs._name;
clear ();
actions.insert(actions.end(),rhs.actions.begin(),rhs.actions.end());
return *this;
}
void
UndoTransaction::add_command (const UndoAction& action)
{
actions.push_back (action);
}
void
UndoTransaction::clear ()
{
actions.clear ();
}
void
UndoTransaction::operator() ()
{
for (list<UndoAction>::iterator i = actions.begin(); i != actions.end(); ++i) {
(*i)();
}
}
void
UndoTransaction::undo ()
{
cerr << "Undo " << _name << endl;
for (list<UndoAction>::reverse_iterator i = actions.rbegin(); i != actions.rend(); ++i) {
i->undo();
}
}
void
UndoTransaction::redo ()
{
cerr << "Redo " << _name << endl;
(*this)();
}
void
UndoHistory::add (UndoTransaction ut)
{
UndoList.push_back (ut);
}
void
UndoHistory::undo (unsigned int n)
{
while (n--) {
if (UndoList.size() == 0) {
return;
}
UndoTransaction ut = UndoList.back ();
UndoList.pop_back ();
ut.undo ();
RedoList.push_back (ut);
}
}
void
UndoHistory::redo (unsigned int n)
{
while (n--) {
if (RedoList.size() == 0) {
return;
}
UndoTransaction ut = RedoList.back ();
RedoList.pop_back ();
ut.redo ();
UndoList.push_back (trans);
}
}
void
UndoHistory::clear_redo ()
{
RedoList.clear ();
}
void
UndoHistory::clear_undo ()
{
UndoList.clear ();
}
void
UndoHistory::clear ()
{
RedoList.clear ();
UndoList.clear ();
}