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/***************************************************************************
UndoDeleteAction.cpp - UndoAction for deletion of a range of samples
-------------------
begin : Jun 08 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/MultiTrackReader.h"
#include "libkwave/SignalManager.h"
#include "libkwave/undo/UndoAction.h"
#include "libkwave/undo/UndoDeleteAction.h"
#include "libkwave/undo/UndoDeleteMetaDataAction.h"
#include "libkwave/undo/UndoInsertAction.h"
//***************************************************************************
Kwave::UndoDeleteAction::UndoDeleteAction(
QWidget *parent_widget,
const QVector<unsigned int> &track_list,
sample_index_t offset,
sample_index_t length
)
:Kwave::UndoAction(),
m_parent_widget(parent_widget),
m_stripes(), m_meta_data(),
m_track_list(track_list),
m_offset(offset), m_length(length),
m_undo_size(sizeof(*this))
{
// undo size needed for samples
m_undo_size += m_length * sizeof(sample_t) * m_track_list.count();
}
//***************************************************************************
Kwave::UndoDeleteAction::~UndoDeleteAction()
{
m_stripes.clear();
}
//***************************************************************************
QString Kwave::UndoDeleteAction::description()
{
return i18n("Delete");
}
//***************************************************************************
qint64 Kwave::UndoDeleteAction::undoSize()
{
return m_undo_size;
}
//***************************************************************************
qint64 Kwave::UndoDeleteAction::redoSize()
{
return sizeof(Kwave::UndoInsertAction);
}
//***************************************************************************
bool Kwave::UndoDeleteAction::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
const sample_index_t left = m_offset;
const sample_index_t right = m_offset + m_length - 1;
m_stripes = manager.stripes(m_track_list, left, right);
if (m_stripes.isEmpty())
return false; // retrieving the stripes failed
// save the meta data
m_meta_data = manager.metaData().copy(m_offset, m_length);
return true;
}
//***************************************************************************
Kwave::UndoAction *Kwave::UndoDeleteAction::undo(Kwave::SignalManager &manager,
bool with_redo)
{
Kwave::UndoAction *redo_action = nullptr;
// store data for redo
if (with_redo) {
redo_action = new(std::nothrow) Kwave::UndoInsertAction(
m_parent_widget, m_track_list,
m_offset, m_length
);
Q_ASSERT(redo_action);
if (!redo_action) return nullptr;
redo_action->store(manager);
}
if (!m_length) return redo_action; // shortcut: this is an empty action
// insert space for the stripes
if (!manager.insertSpace(m_offset, m_length, m_track_list)) {
qWarning("UndoDeleteAction::undo() FAILED [insertSpace]");
delete redo_action;
return nullptr;
}
// merge the stripes back into the signal
if (!manager.mergeStripes(m_stripes, m_track_list)) {
qWarning("UndoDeleteAction::undo() FAILED [mergeStripes]");
delete redo_action;
return nullptr;
}
// restore the saved meta data
manager.metaData().add(m_meta_data);
return redo_action;
}
//***************************************************************************
void Kwave::UndoDeleteAction::dump(const QString &indent)
{
qDebug("%sundo delete from [%lu ... %lu] (%lu)", DBG(indent),
static_cast<unsigned long int>(m_offset),
static_cast<unsigned long int>(m_offset + ((m_length) ?
(m_length - 1) : m_length)),
static_cast<unsigned long int>(m_length));
}
//***************************************************************************
//***************************************************************************
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