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diff --git a/logic/minecraft/ModList.h b/logic/minecraft/ModList.h
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+/* Copyright 2013-2015 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 <QString>
+#include <QDir>
+#include <QAbstractListModel>
+
+#include "logic/minecraft/Mod.h"
+
+class LegacyInstance;
+class BaseInstance;
+class QFileSystemWatcher;
+
+/**
+ * A legacy mod list.
+ * Backed by a folder.
+ */
+class ModList : public QAbstractListModel
+{
+ Q_OBJECT
+public:
+ enum Columns
+ {
+ ActiveColumn = 0,
+ NameColumn,
+ VersionColumn
+ };
+ ModList(const QString &dir, const QString &list_file = QString());
+
+ virtual QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const;
+ virtual bool setData(const QModelIndex &index, const QVariant &value,
+ int role = Qt::EditRole);
+
+ virtual int rowCount(const QModelIndex &parent = QModelIndex()) const
+ {
+ return size();
+ }
+ ;
+ virtual QVariant headerData(int section, Qt::Orientation orientation,
+ int role = Qt::DisplayRole) const;
+ virtual int columnCount(const QModelIndex &parent) const;
+
+ size_t size() const
+ {
+ return mods.size();
+ }
+ ;
+ bool empty() const
+ {
+ return size() == 0;
+ }
+ Mod &operator[](size_t index)
+ {
+ return mods[index];
+ }
+
+ /// Reloads the mod list and returns true if the list changed.
+ virtual bool update();
+
+ /**
+ * Adds the given mod to the list at the given index - if the list supports custom ordering
+ */
+ virtual bool installMod(const QFileInfo &filename, int index = 0);
+
+ /// Deletes the mod at the given index.
+ virtual bool deleteMod(int index);
+
+ /// Deletes all the selected mods
+ virtual bool deleteMods(int first, int last);
+
+ /**
+ * move the mod at index to the position N
+ * 0 is the beginning of the list, length() is the end of the list.
+ */
+ virtual bool moveModTo(int from, int to);
+
+ /**
+ * move the mod at index one position upwards
+ */
+ virtual bool moveModUp(int from);
+ virtual bool moveModsUp(int first, int last);
+
+ /**
+ * move the mod at index one position downwards
+ */
+ virtual bool moveModDown(int from);
+ virtual bool moveModsDown(int first, int last);
+
+ /// flags, mostly to support drag&drop
+ virtual Qt::ItemFlags flags(const QModelIndex &index) const;
+ /// get data for drag action
+ virtual QMimeData *mimeData(const QModelIndexList &indexes) const;
+ /// get the supported mime types
+ virtual QStringList mimeTypes() const;
+ /// process data from drop action
+ virtual bool dropMimeData(const QMimeData *data, Qt::DropAction action, int row, int column,
+ const QModelIndex &parent);
+ /// what drag actions do we support?
+ virtual Qt::DropActions supportedDragActions() const;
+
+ /// what drop actions do we support?
+ virtual Qt::DropActions supportedDropActions() const;
+
+ void startWatching();
+ void stopWatching();
+
+ virtual bool isValid();
+
+ QDir dir()
+ {
+ return m_dir;
+ }
+
+ const QList<Mod> & allMods()
+ {
+ return mods;
+ }
+
+private:
+ void internalSort(QList<Mod> & what);
+ struct OrderItem
+ {
+ QString id;
+ bool enabled = false;
+ };
+ typedef QList<OrderItem> OrderList;
+ OrderList readListFile();
+ bool saveListFile();
+private
+slots:
+ void directoryChanged(QString path);
+
+signals:
+ void changed();
+
+protected:
+ QFileSystemWatcher *m_watcher;
+ bool is_watching;
+ QDir m_dir;
+ QString m_list_file;
+ QString m_list_id;
+ QList<Mod> mods;
+};