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