Clementine-audio-player-Mac.../src/playlist/queue.cpp

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/* This file is part of Clementine.
Copyright 2010, David Sansome <me@davidsansome.com>
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Clementine 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 3 of the License, or
(at your option) any later version.
Clementine 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 Clementine. If not, see <http://www.gnu.org/licenses/>.
*/
#include "queue.h"
#include <QBuffer>
#include <QMimeData>
#include <QtDebug>
const char* Queue::kRowsMimetype = "application/x-clementine-queue-rows";
Queue::Queue(QObject* parent) : QAbstractProxyModel(parent) {}
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QModelIndex Queue::mapFromSource(const QModelIndex& source_index) const {
if (!source_index.isValid()) return QModelIndex();
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const int source_row = source_index.row();
for (int i = 0; i < source_indexes_.count(); ++i) {
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if (source_indexes_[i].row() == source_row)
return index(i, source_index.column());
}
return QModelIndex();
}
bool Queue::ContainsSourceRow(int source_row) const {
for (int i = 0; i < source_indexes_.count(); ++i) {
if (source_indexes_[i].row() == source_row) return true;
}
return false;
}
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QModelIndex Queue::mapToSource(const QModelIndex& proxy_index) const {
if (!proxy_index.isValid()) return QModelIndex();
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return source_indexes_[proxy_index.row()];
}
void Queue::setSourceModel(QAbstractItemModel* source_model) {
if (sourceModel()) {
disconnect(sourceModel(), SIGNAL(dataChanged(QModelIndex, QModelIndex)),
this, SLOT(SourceDataChanged(QModelIndex, QModelIndex)));
disconnect(sourceModel(), SIGNAL(rowsRemoved(QModelIndex, int, int)), this,
SLOT(SourceLayoutChanged()));
disconnect(sourceModel(), SIGNAL(layoutChanged()), this,
SLOT(SourceLayoutChanged()));
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}
QAbstractProxyModel::setSourceModel(source_model);
connect(sourceModel(), SIGNAL(dataChanged(QModelIndex, QModelIndex)), this,
SLOT(SourceDataChanged(QModelIndex, QModelIndex)));
connect(sourceModel(), SIGNAL(rowsRemoved(QModelIndex, int, int)), this,
SLOT(SourceLayoutChanged()));
connect(sourceModel(), SIGNAL(layoutChanged()), this,
SLOT(SourceLayoutChanged()));
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}
void Queue::SourceDataChanged(const QModelIndex& top_left,
const QModelIndex& bottom_right) {
for (int row = top_left.row(); row <= bottom_right.row(); ++row) {
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QModelIndex proxy_index = mapFromSource(sourceModel()->index(row, 0));
if (!proxy_index.isValid()) continue;
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emit dataChanged(proxy_index, proxy_index);
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}
}
void Queue::SourceLayoutChanged() {
for (int i = 0; i < source_indexes_.count(); ++i) {
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if (!source_indexes_[i].isValid()) {
beginRemoveRows(QModelIndex(), i, i);
source_indexes_.removeAt(i);
endRemoveRows();
--i;
}
}
}
QModelIndex Queue::index(int row, int column, const QModelIndex& parent) const {
return createIndex(row, column);
}
QModelIndex Queue::parent(const QModelIndex& child) const {
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return QModelIndex();
}
int Queue::rowCount(const QModelIndex& parent) const {
if (parent.isValid()) return 0;
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return source_indexes_.count();
}
int Queue::columnCount(const QModelIndex&) const { return 1; }
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QVariant Queue::data(const QModelIndex& proxy_index, int role) const {
QModelIndex source_index = source_indexes_[proxy_index.row()];
switch (role) {
case Playlist::Role_QueuePosition:
return proxy_index.row();
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case Qt::DisplayRole: {
const QString artist =
source_index.sibling(source_index.row(), Playlist::Column_Artist)
.data()
.toString();
const QString title =
source_index.sibling(source_index.row(), Playlist::Column_Title)
.data()
.toString();
if (artist.isEmpty()) return title;
return QString(artist + " - " + title);
}
default:
return QVariant();
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}
}
void Queue::ToggleTracks(const QModelIndexList& source_indexes) {
for (const QModelIndex& source_index : source_indexes) {
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QModelIndex proxy_index = mapFromSource(source_index);
if (proxy_index.isValid()) {
// Dequeue the track
const int row = proxy_index.row();
beginRemoveRows(QModelIndex(), row, row);
source_indexes_.removeAt(row);
endRemoveRows();
} else {
// Enqueue the track
const int row = source_indexes_.count();
beginInsertRows(QModelIndex(), row, row);
source_indexes_ << QPersistentModelIndex(source_index);
endInsertRows();
}
}
}
int Queue::PositionOf(const QModelIndex& source_index) const {
return mapFromSource(source_index).row();
}
bool Queue::is_empty() const { return source_indexes_.isEmpty(); }
void Queue::Clear() {
if (source_indexes_.isEmpty()) return;
beginRemoveRows(QModelIndex(), 0, source_indexes_.count() - 1);
source_indexes_.clear();
endRemoveRows();
}
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void Queue::Move(const QList<int>& proxy_rows, int pos) {
layoutAboutToBeChanged();
QList<QPersistentModelIndex> moved_items;
// Take the items out of the list first, keeping track of whether the
// insertion point changes
int offset = 0;
for (int row : proxy_rows) {
moved_items << source_indexes_.takeAt(row - offset);
if (pos != -1 && pos >= row) pos--;
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offset++;
}
// Put the items back in
const int start = pos == -1 ? source_indexes_.count() : pos;
for (int i = start; i < start + moved_items.count(); ++i) {
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source_indexes_.insert(i, moved_items[i - start]);
}
// Update persistent indexes
for (const QModelIndex& pidx : persistentIndexList()) {
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const int dest_offset = proxy_rows.indexOf(pidx.row());
if (dest_offset != -1) {
// This index was moved
changePersistentIndex(
pidx, index(start + dest_offset, pidx.column(), QModelIndex()));
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} else {
int d = 0;
for (int row : proxy_rows) {
if (pidx.row() > row) d--;
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}
if (pidx.row() + d >= start) d += proxy_rows.count();
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changePersistentIndex(
pidx, index(pidx.row() + d, pidx.column(), QModelIndex()));
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}
}
layoutChanged();
}
void Queue::MoveUp(int row) { Move(QList<int>() << row, row - 1); }
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void Queue::MoveDown(int row) { Move(QList<int>() << row, row + 2); }
QStringList Queue::mimeTypes() const {
return QStringList() << kRowsMimetype << Playlist::kRowsMimetype;
}
Qt::DropActions Queue::supportedDropActions() const {
return Qt::MoveAction | Qt::CopyAction | Qt::LinkAction;
}
QMimeData* Queue::mimeData(const QModelIndexList& indexes) const {
QMimeData* data = new QMimeData;
QList<int> rows;
for (const QModelIndex& index : indexes) {
if (index.column() != 0) continue;
rows << index.row();
}
QBuffer buf;
buf.open(QIODevice::WriteOnly);
QDataStream stream(&buf);
stream << rows;
buf.close();
data->setData(kRowsMimetype, buf.data());
return data;
}
bool Queue::dropMimeData(const QMimeData* data, Qt::DropAction action, int row,
int, const QModelIndex&) {
if (action == Qt::IgnoreAction) return false;
if (data->hasFormat(kRowsMimetype)) {
// Dragged from the queue
QList<int> proxy_rows;
QDataStream stream(data->data(kRowsMimetype));
stream >> proxy_rows;
qStableSort(proxy_rows); // Make sure we take them in order
Move(proxy_rows, row);
} else if (data->hasFormat(Playlist::kRowsMimetype)) {
// Dragged from the playlist
Playlist* playlist = nullptr;
QList<int> source_rows;
QDataStream stream(data->data(Playlist::kRowsMimetype));
stream.readRawData(reinterpret_cast<char*>(&playlist), sizeof(playlist));
stream >> source_rows;
QModelIndexList source_indexes;
for (int source_row : source_rows) {
const QModelIndex source_index = sourceModel()->index(source_row, 0);
const QModelIndex proxy_index = mapFromSource(source_index);
if (proxy_index.isValid()) {
// This row was already in the queue, so no need to add it again
continue;
}
source_indexes << source_index;
}
if (!source_indexes.isEmpty()) {
const int insert_point = row == -1 ? source_indexes_.count() : row;
beginInsertRows(QModelIndex(), insert_point,
insert_point + source_indexes.count() - 1);
for (int i = 0; i < source_indexes.count(); ++i) {
source_indexes_.insert(insert_point + i, source_indexes[i]);
}
endInsertRows();
}
}
return true;
}
Qt::ItemFlags Queue::flags(const QModelIndex& index) const {
Qt::ItemFlags flags = Qt::ItemIsEnabled | Qt::ItemIsSelectable;
if (index.isValid())
flags |= Qt::ItemIsDragEnabled;
else
flags |= Qt::ItemIsDropEnabled;
return flags;
}
int Queue::PeekNext() const {
if (source_indexes_.isEmpty()) return -1;
return source_indexes_.first().row();
}
int Queue::TakeNext() {
if (source_indexes_.isEmpty()) return -1;
beginRemoveRows(QModelIndex(), 0, 0);
int ret = source_indexes_.takeFirst().row();
endRemoveRows();
return ret;
}
QVariant Queue::headerData(int section, Qt::Orientation orientation,
int role) const {
return QVariant();
}
void Queue::Remove(QList<int>& proxy_rows) {
// order the rows
qStableSort(proxy_rows);
// reflects immediately changes in the playlist
layoutAboutToBeChanged();
int removed_rows = 0;
for (int row : proxy_rows) {
// after the first row, the row number needs to be updated
const int real_row = row - removed_rows;
beginRemoveRows(QModelIndex(), real_row, real_row);
source_indexes_.removeAt(real_row);
endRemoveRows();
removed_rows++;
}
layoutChanged();
}