Add 'meshmc/' from commit 'fad6a1066616b69d7f5fef01178efdf014c59537'

git-subtree-dir: meshmc
git-subtree-mainline: 934382c8a1ce738589dee9ee0f14e1cec812770e
git-subtree-split: fad6a1066616b69d7f5fef01178efdf014c59537

1 files changed, 169 insertions, 0 deletions

diff --git a/meshmc/launcher/minecraft/mod/ModFolderModel.h b/meshmc/launcher/minecraft/mod/ModFolderModel.h
new file mode 100644
index 0000000000..845c6d6e4a
--- /dev/null
+++ b/meshmc/launcher/minecraft/mod/ModFolderModel.h
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+/* SPDX-FileCopyrightText: 2026 Project Tick
+ * SPDX-FileContributor: Project Tick
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ *
+ *   MeshMC - A Custom Launcher for Minecraft
+ *   Copyright (C) 2026 Project Tick
+ *
+ *   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 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   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.
+ */
+
+#pragma once
+
+#include <QList>
+#include <QMap>
+#include <QSet>
+#include <QString>
+#include <QDir>
+#include <QAbstractListModel>
+
+#include "Mod.h"
+
+#include "ModFolderLoadTask.h"
+#include "LocalModParseTask.h"
+
+class LegacyInstance;
+class BaseInstance;
+class QFileSystemWatcher;
+
+/**
+ * A legacy mod list.
+ * Backed by a folder.
+ */
+class ModFolderModel : public QAbstractListModel
+{
+	Q_OBJECT
+  public:
+	enum Columns {
+		ActiveColumn = 0,
+		NameColumn,
+		VersionColumn,
+		DateColumn,
+		NUM_COLUMNS
+	};
+	enum ModStatusAction { Disable, Enable, Toggle };
+	ModFolderModel(const QString& dir);
+
+	virtual QVariant data(const QModelIndex& index,
+						  int role = Qt::DisplayRole) const override;
+	virtual bool setData(const QModelIndex& index, const QVariant& value,
+						 int role = Qt::EditRole) override;
+	Qt::DropActions supportedDropActions() const override;
+
+	/// flags, mostly to support drag&drop
+	virtual Qt::ItemFlags flags(const QModelIndex& index) const override;
+	QStringList mimeTypes() const override;
+	bool dropMimeData(const QMimeData* data, Qt::DropAction action, int row,
+					  int column, const QModelIndex& parent) override;
+
+	virtual int rowCount(const QModelIndex&) const override
+	{
+		return size();
+	}
+
+	virtual QVariant headerData(int section, Qt::Orientation orientation,
+								int role = Qt::DisplayRole) const override;
+	virtual int columnCount(const QModelIndex& parent) const override;
+
+	size_t size() const
+	{
+		return mods.size();
+	};
+	bool empty() const
+	{
+		return size() == 0;
+	}
+	Mod& operator[](size_t index)
+	{
+		return mods[index];
+	}
+	const Mod& at(size_t index) const
+	{
+		return mods.at(index);
+	}
+
+	/// Reloads the mod list and returns true if the list changed.
+	bool update();
+
+	/**
+	 * Adds the given mod to the list at the given index - if the list supports
+	 * custom ordering
+	 */
+	bool installMod(const QString& filename);
+
+	/// Deletes all the selected mods
+	bool deleteMods(const QModelIndexList& indexes);
+
+	/// Enable or disable listed mods
+	bool setModStatus(const QModelIndexList& indexes, ModStatusAction action);
+
+	void startWatching();
+	void stopWatching();
+
+	bool isValid();
+
+	QDir dir()
+	{
+		return m_dir;
+	}
+
+	const QList<Mod>& allMods()
+	{
+		return mods;
+	}
+
+  public slots:
+	void disableInteraction(bool disabled);
+
+  private slots:
+	void directoryChanged(QString path);
+	void finishUpdate();
+	void finishModParse(int token);
+
+  signals:
+	void updateFinished();
+
+  private:
+	void resolveMod(Mod& m);
+	bool setModStatus(int index, ModStatusAction action);
+
+  protected:
+	QFileSystemWatcher* m_watcher;
+	bool is_watching = false;
+	ModFolderLoadTask::ResultPtr m_update;
+	bool scheduled_update = false;
+	bool interaction_disabled = false;
+	QDir m_dir;
+	QMap<QString, int> modsIndex;
+	QMap<int, LocalModParseTask::ResultPtr> activeTickets;
+	int nextResolutionTicket = 0;
+	QList<Mod> mods;
+};