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/*
* Copyright (C) 2015 Dominik Haumann <dhaumann@kde.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "QuotaListModel.h"
#include <QDebug>
QuotaListModel::QuotaListModel(QObject *parent)
: QAbstractListModel(parent)
{
}
namespace {
/**
* QML data roles.
*/
enum {
DetailsRole = Qt::UserRole,
IconRole,
FreeStringRole,
UsedStringRole,
MountPointRole,
UsageRole
};
}
QHash<int, QByteArray> QuotaListModel::roleNames() const
{
QHash<int, QByteArray> roles;
roles[DetailsRole] = "details";
roles[IconRole] = "icon";
roles[FreeStringRole] = "free";
roles[UsedStringRole] = "used";
roles[MountPointRole] = "mountPoint";
roles[UsageRole] = "usage";
return roles;
}
QVariant QuotaListModel::data(const QModelIndex &index, int role) const
{
if (! index.isValid() || index.row() >= m_items.size()) {
return QVariant();
}
const auto item = m_items[index.row()];
switch (role) {
case DetailsRole: return item.mountString();
case IconRole: return item.iconName();
case FreeStringRole: return item.freeString();
case UsedStringRole: return item.usedString();
case MountPointRole: return item.mountPoint();
case UsageRole: return item.usage();
}
return QVariant();
}
int QuotaListModel::rowCount(const QModelIndex &index) const
{
if (! index.isValid()) {
return m_items.size();
}
return 0;
}
bool QuotaListModel::setData(const QModelIndex &index, const QVariant &variant, int role)
{
Q_UNUSED(role)
const int row = index.row();
if (index.isValid() && row < m_items.size()) {
const QuotaItem item = variant.value<QuotaItem>();
// This assert makes sure that changing items modify the correct item:
// therefore, the unique identifier 'mountPoint()' is used. If that
// is not the case, the newly inserted row must have an empty mountPoint().
Q_ASSERT(item.mountPoint() == m_items[row].mountPoint()
|| m_items[row].mountPoint().isEmpty());
if (m_items[row] != item) {
m_items[row] = item;
emit dataChanged(index, index);
return true;
}
}
return false;
}
bool QuotaListModel::insertRows(int row, int count, const QModelIndex &parent)
{
// only top-level items are supported
if (parent.isValid()) {
return false;
}
beginInsertRows(QModelIndex(), row, row + count - 1);
m_items.insert(row, count, QuotaItem());
endInsertRows();
return true;
}
bool QuotaListModel::removeRows(int row, int count, const QModelIndex &parent)
{
// only top-level items are valid
if (parent.isValid() || (row + count) >= m_items.size()) {
return false;
}
beginRemoveRows(QModelIndex(), row, row + count - 1);
m_items.remove(row, count);
endRemoveRows();
return true;
}
void QuotaListModel::clear()
{
beginResetModel();
m_items.clear();
endResetModel();
}
namespace {
QStringList mountPoints(const QVector<QuotaItem> &items)
{
QStringList list;
for (auto & item : items) {
list.append(item.mountPoint());
}
return list;
}
int indexOfMountPoint(const QString &mountPoint, const QVector<QuotaItem> &items)
{
for (int i = 0; i < items.size(); ++i) {
if (mountPoint == items[i].mountPoint()) {
return i;
}
}
return -1;
}
}
void QuotaListModel::updateItems(const QVector<QuotaItem> &items)
{
QStringList unusedMountPoints = mountPoints(m_items);
// merge existing and new mount points
for (auto & item : items) {
// remove still used item from unused list
unusedMountPoints.removeOne(item.mountPoint());
// insert or modify m_items
int row = indexOfMountPoint(item.mountPoint(), m_items);
if (row < 0) {
// new item: append on end
row = m_items.size();
insertRow(row);
}
setData(createIndex(row, 0), QVariant::fromValue(item));
}
// remove mount points, that do not exist anymore
for (const auto & mountPoint : unusedMountPoints) {
const int row = indexOfMountPoint(mountPoint, m_items);
Q_ASSERT(row >= 0);
removeRow(row);
}
}
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