// SPDX-License-Identifier: GPL-3.0-only
/*
* Prism Launcher - Minecraft Launcher
* Copyright (C) 2022 Sefa Eyeoglu <contact@scrumplex.net>
* Copyright (C) 2023 TheKodeToad <TheKodeToad@proton.me>
*
* 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, version 3.
*
* This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
*
* This file incorporates work covered by the following copyright and
* permission notice:
*
* Copyright 2013-2021 MultiMC Contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "FileIgnoreProxy.h"
#include <QDebug>
#include <QFileSystemModel>
#include <QSortFilterProxyModel>
#include <QStack>
#include "FileSystem.h"
#include "SeparatorPrefixTree.h"
#include "StringUtils.h"
FileIgnoreProxy::FileIgnoreProxy(QString root, QObject* parent) : QSortFilterProxyModel(parent), root(root) {}
// NOTE: Sadly, we have to do sorting ourselves.
bool FileIgnoreProxy::lessThan(const QModelIndex& left, const QModelIndex& right) const
{
QFileSystemModel* fsm = qobject_cast<QFileSystemModel*>(sourceModel());
if (!fsm) {
return QSortFilterProxyModel::lessThan(left, right);
}
bool asc = sortOrder() == Qt::AscendingOrder ? true : false;
QFileInfo leftFileInfo = fsm->fileInfo(left);
QFileInfo rightFileInfo = fsm->fileInfo(right);
if (!leftFileInfo.isDir() && rightFileInfo.isDir()) {
return !asc;
}
if (leftFileInfo.isDir() && !rightFileInfo.isDir()) {
return asc;
}
// sort and proxy model breaks the original model...
if (sortColumn() == 0) {
return StringUtils::naturalCompare(leftFileInfo.fileName(), rightFileInfo.fileName(), Qt::CaseInsensitive) < 0;
}
if (sortColumn() == 1) {
auto leftSize = leftFileInfo.size();
auto rightSize = rightFileInfo.size();
if ((leftSize == rightSize) || (leftFileInfo.isDir() && rightFileInfo.isDir())) {
return StringUtils::naturalCompare(leftFileInfo.fileName(), rightFileInfo.fileName(), Qt::CaseInsensitive) < 0 ? asc : !asc;
}
return leftSize < rightSize;
}
return QSortFilterProxyModel::lessThan(left, right);
}
Qt::ItemFlags FileIgnoreProxy::flags(const QModelIndex& index) const
{
if (!index.isValid())
return Qt::NoItemFlags;
auto sourceIndex = mapToSource(index);
Qt::ItemFlags flags = sourceIndex.flags();
if (index.column() == 0) {
flags |= Qt::ItemIsUserCheckable;
if (sourceIndex.model()->hasChildren(sourceIndex)) {
flags |= Qt::ItemIsAutoTristate;
}
}
return flags;
}
QVariant FileIgnoreProxy::data(const QModelIndex& index, int role) const
{
QModelIndex sourceIndex = mapToSource(index);
if (index.column() == 0 && role == Qt::CheckStateRole) {
QFileSystemModel* fsm = qobject_cast<QFileSystemModel*>(sourceModel());
auto blockedPath = relPath(fsm->filePath(sourceIndex));
auto cover = blocked.cover(blockedPath);
if (!cover.isNull()) {
return QVariant(Qt::Unchecked);
} else if (blocked.exists(blockedPath)) {
return QVariant(Qt::PartiallyChecked);
} else {
return QVariant(Qt::Checked);
}
}
return sourceIndex.data(role);
}
bool FileIgnoreProxy::setData(const QModelIndex& index, const QVariant& value, int role)
{
if (index.column() == 0 && role == Qt::CheckStateRole) {
Qt::CheckState state = static_cast<Qt::CheckState>(value.toInt());
return setFilterState(index, state);
}
QModelIndex sourceIndex = mapToSource(index);
return QSortFilterProxyModel::sourceModel()->setData(sourceIndex, value, role);
}
QString FileIgnoreProxy::relPath(const QString& path) const
{
QString prefix = QDir().absoluteFilePath(root);
prefix += '/';
if (!path.startsWith(prefix)) {
return QString();
}
return path.mid(prefix.size());
}
bool FileIgnoreProxy::setFilterState(QModelIndex index, Qt::CheckState state)
{
QFileSystemModel* fsm = qobject_cast<QFileSystemModel*>(sourceModel());
if (!fsm) {
return false;
}
QModelIndex sourceIndex = mapToSource(index);
auto blockedPath = relPath(fsm->filePath(sourceIndex));
bool changed = false;
if (state == Qt::Unchecked) {
// blocking a path
auto& node = blocked.insert(blockedPath);
// get rid of all blocked nodes below
node.clear();
changed = true;
} else if (state == Qt::Checked || state == Qt::PartiallyChecked) {
if (!blocked.remove(blockedPath)) {
auto cover = blocked.cover(blockedPath);
qDebug() << "Blocked by cover" << cover;
// uncover
blocked.remove(cover);
// block all contents, except for any cover
QModelIndex rootIndex = fsm->index(FS::PathCombine(root, cover));
QModelIndex doing = rootIndex;
int row = 0;
QStack<QModelIndex> todo;
while (1) {
auto node = fsm->index(row, 0, doing);
if (!node.isValid()) {
if (!todo.size()) {
break;
} else {
doing = todo.pop();
row = 0;
continue;
}
}
auto relpath = relPath(fsm->filePath(node));
if (blockedPath.startsWith(relpath)) // cover found?
{
// continue processing cover later
todo.push(node);
} else {
// or just block this one.
blocked.insert(relpath);
}
row++;
}
}
changed = true;
}
if (changed) {
// update the thing
emit dataChanged(index, index, { Qt::CheckStateRole });
// update everything above index
QModelIndex up = index.parent();
while (1) {
if (!up.isValid())
break;
emit dataChanged(up, up, { Qt::CheckStateRole });
up = up.parent();
}
// and everything below the index
QModelIndex doing = index;
int row = 0;
QStack<QModelIndex> todo;
while (1) {
auto node = this->index(row, 0, doing);
if (!node.isValid()) {
if (!todo.size()) {
break;
} else {
doing = todo.pop();
row = 0;
continue;
}
}
emit dataChanged(node, node, { Qt::CheckStateRole });
todo.push(node);
row++;
}
// siblings and unrelated nodes are ignored
}
return true;
}
bool FileIgnoreProxy::shouldExpand(QModelIndex index)
{
QModelIndex sourceIndex = mapToSource(index);
QFileSystemModel* fsm = qobject_cast<QFileSystemModel*>(sourceModel());
if (!fsm) {
return false;
}
auto blockedPath = relPath(fsm->filePath(sourceIndex));
auto found = blocked.find(blockedPath);
if (found) {
return !found->leaf();
}
return false;
}
void FileIgnoreProxy::setBlockedPaths(QStringList paths)
{
beginResetModel();
blocked.clear();
blocked.insert(paths);
endResetModel();
}
bool FileIgnoreProxy::filterAcceptsColumn(int source_column, const QModelIndex& source_parent) const
{
Q_UNUSED(source_parent)
// adjust the columns you want to filter out here
// return false for those that will be hidden
if (source_column == 2 || source_column == 3)
return false;
return true;
}