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/***************************************************************************
UndoAddMetaDataAction.cpp - Undo action for insertion of labels
-------------------
begin : Wed Aug 16 2006
copyright : (C) 2006 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 <algorithm>
#include <new>
#include <QVariant>
#include <KLocalizedString>
#include "libkwave/MetaData.h"
#include "libkwave/SignalManager.h"
#include "libkwave/undo/UndoAddMetaDataAction.h"
#include "libkwave/undo/UndoDeleteMetaDataAction.h"
//***************************************************************************
Kwave::UndoAddMetaDataAction::UndoAddMetaDataAction(
const Kwave::MetaDataList &meta_data)
:Kwave::UndoAction(),
m_description(),
m_offset(0),
m_length(SAMPLE_INDEX_MAX)
{
sample_index_t first = SAMPLE_INDEX_MAX;
sample_index_t last = 0;
// sanity check: list should not be empty
Q_ASSERT(!meta_data.isEmpty());
if (meta_data.isEmpty()) return;
/*
* loop over the list to find out the first/last sample offset
* and the list of affected tracks
*/
foreach (const Kwave::MetaData &m, meta_data)
{
// search over a list of known properties which contain range/position
QStringList properties = Kwave::MetaData::positionBoundPropertyNames();
foreach (const QString &tag, properties) {
// check for a "start" property
QVariant v = m[tag];
bool ok = false;
sample_index_t pos = static_cast<sample_index_t>(
v.toULongLong(&ok));
if (ok && (pos < first)) first = pos;
if (ok && (pos > last)) last = pos;
}
}
// fix first/last in case that nothing was found, select everything
if (first > last) {
m_offset = SAMPLE_INDEX_MAX;
m_length = 0;
} else {
m_offset = first;
m_length = (last - first) + 1;
}
/*
* determine the description of the action
*/
for (;;) {
QString name;
QList<Kwave::MetaData> values = meta_data.values();
Q_ASSERT(!values.isEmpty());
if (!values.isEmpty()) {
const Kwave::MetaData &m = values.first();
if (m.hasProperty(Kwave::MetaData::STDPROP_TYPE))
name = m[Kwave::MetaData::STDPROP_TYPE].toString();
}
// if the meta data list contains only one object: try to find
// out the object's name
if ((meta_data.count() == 1) && name.length()) {
m_description = i18nc(
"name of the undo action for inserting a meta data object",
"Insert %1",
name
);
break;
}
// check if the list contains only objects of the same type
bool all_same_type = true;
foreach (const Kwave::MetaData &m, meta_data) {
QString n = m[Kwave::MetaData::STDPROP_TYPE].toString();
if (!n.length() || (n != name)) {
all_same_type = false;
break;
}
}
if (all_same_type) {
m_description = i18nc(
"name of the undo action for inserting multiple "
"meta data objects of the same type: "
"%1=number of elements, %2=name of one element in singular",
"Insert %1 %2 objects", meta_data.count(), name
);
break;
}
m_description = i18n("Insert Meta Data");
break;
}
}
//***************************************************************************
Kwave::UndoAddMetaDataAction::~UndoAddMetaDataAction()
{
}
//***************************************************************************
QString Kwave::UndoAddMetaDataAction::description()
{
return m_description;
}
//***************************************************************************
qint64 Kwave::UndoAddMetaDataAction::undoSize()
{
return sizeof(*this);
}
//***************************************************************************
qint64 Kwave::UndoAddMetaDataAction::redoSize()
{
return sizeof(UndoDeleteMetaDataAction);
}
//***************************************************************************
bool Kwave::UndoAddMetaDataAction::store(Kwave::SignalManager &)
{
// nothing to do, all data has already
// been stored in the constructor
return true;
}
//***************************************************************************
Kwave::UndoAction *Kwave::UndoAddMetaDataAction::undo(
Kwave::SignalManager &manager, bool with_redo)
{
Kwave::UndoAction *redo = nullptr;
Kwave::MetaDataList meta_data =
manager.metaData().copy(m_offset, m_length);
// store data for redo
if (with_redo && !meta_data.isEmpty()) {
redo = new(std::nothrow) Kwave::UndoDeleteMetaDataAction(meta_data);
Q_ASSERT(redo);
if (redo) redo->store(manager);
}
// remove the meta data from the signal manager
manager.metaData().deleteRange(m_offset, m_length);
return redo;
}
//***************************************************************************
//***************************************************************************
|
