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/***************************************************************************
UndoDeleteTrack.cpp - Undo action for deletion of tracks
-------------------
begin : Mon Jun 25 2001
copyright : (C) 2001 by Thomas Eschenbacher
email : Thomas Eschenbacher <Thomas.Eschenbacher@gmx.de>
***************************************************************************/
/***************************************************************************
* *
* 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. *
* *
***************************************************************************/
#include "config.h"
#include <new>
#include <KLocalizedString>
#include "libkwave/SignalManager.h"
#include "libkwave/undo/UndoDeleteTrack.h"
#include "libkwave/undo/UndoInsertTrack.h"
//***************************************************************************
Kwave::UndoDeleteTrack::UndoDeleteTrack(Kwave::Signal &signal,
unsigned int track)
:UndoAction(), m_signal(signal), m_track(track),
m_length(signal.length()), m_stripes(), m_uuid(signal.uuidOfTrack(track))
{
}
//***************************************************************************
Kwave::UndoDeleteTrack::~UndoDeleteTrack()
{
}
//***************************************************************************
QString Kwave::UndoDeleteTrack::description()
{
return i18n("Delete Track");
}
//***************************************************************************
qint64 Kwave::UndoDeleteTrack::undoSize()
{
return sizeof(*this) + m_length * sizeof(sample_t);
}
//***************************************************************************
qint64 Kwave::UndoDeleteTrack::redoSize()
{
return sizeof(Kwave::UndoInsertTrack);
}
//***************************************************************************
bool Kwave::UndoDeleteTrack::store(Kwave::SignalManager &manager)
{
if (!m_length) return true; // shortcut: this is an empty action
// fork off a multi track stripe list for the selected range
QVector<unsigned int> track_list;
track_list.append(m_track);
m_stripes = manager.stripes(track_list, 0, m_length - 1);
if (m_stripes.isEmpty())
return false; // retrieving the stripes failed
return true;
}
//***************************************************************************
Kwave::UndoAction *Kwave::UndoDeleteTrack::undo(Kwave::SignalManager &manager,
bool with_redo)
{
Kwave::UndoAction *redo_action = nullptr;
// create a redo action
if (with_redo) {
redo_action =
new(std::nothrow) Kwave::UndoInsertTrack(m_signal, m_track);
Q_ASSERT(redo_action);
if (redo_action) redo_action->store(manager);
}
// insert an empty track into the signal
m_signal.insertTrack(m_track, m_length, &m_uuid);
// merge the stripes back into the signal
QVector<unsigned int> track_list;
track_list.append(m_track);
if (!manager.mergeStripes(m_stripes, track_list)) {
qWarning("UndoDeleteTrack::undo() FAILED [mergeStripes]");
delete redo_action;
return nullptr;
}
return redo_action;
}
//***************************************************************************
//***************************************************************************
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