1 files changed, 462 insertions, 0 deletions
diff --git a/libraries/logic/AbstractCommonModel.h b/libraries/logic/AbstractCommonModel.h
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+/* Copyright 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 <QAbstractListModel>
+#include <type_traits>
+#include <functional>
+#include <memory>
+
+class BaseAbstractCommonModel : public QAbstractListModel
+{
+	Q_OBJECT
+public:
+	explicit BaseAbstractCommonModel(const Qt::Orientation orientation, QObject *parent = nullptr);
+
+	// begin QAbstractItemModel interface
+	int rowCount(const QModelIndex &parent = QModelIndex()) const override;
+	int columnCount(const QModelIndex &parent = QModelIndex()) const override;
+	QVariant data(const QModelIndex &index, int role) const override;
+	QVariant headerData(int section, Qt::Orientation orientation, int role) const override;
+	bool setData(const QModelIndex &index, const QVariant &value, int role) override;
+	Qt::ItemFlags flags(const QModelIndex &index) const override;
+	// end QAbstractItemModel interface
+
+	virtual int size() const = 0;
+	virtual int entryCount() const = 0;
+
+	virtual QVariant formatData(const int index, int role, const QVariant &data) const { return data; }
+	virtual QVariant sanetizeData(const int index, int role, const QVariant &data) const { return data; }
+
+protected:
+	virtual QVariant get(const int index, const int entry, const int role) const = 0;
+	virtual bool set(const int index, const int entry, const int role, const QVariant &value) = 0;
+	virtual bool canSet(const int entry) const = 0;
+	virtual QString entryTitle(const int entry) const = 0;
+
+	void notifyAboutToAddObject(const int at);
+	void notifyObjectAdded();
+	void notifyAboutToRemoveObject(const int at);
+	void notifyObjectRemoved();
+	void notifyBeginReset();
+	void notifyEndReset();
+
+	const Qt::Orientation m_orientation;
+};
+
+template<typename Object>
+class AbstractCommonModel : public BaseAbstractCommonModel
+{
+public:
+	explicit AbstractCommonModel(const Qt::Orientation orientation)
+		: BaseAbstractCommonModel(orientation) {}
+	virtual ~AbstractCommonModel() {}
+
+	int size() const override { return m_objects.size(); }
+	int entryCount() const override { return m_entries.size(); }
+
+	void append(const Object &object)
+	{
+		notifyAboutToAddObject(size());
+		m_objects.append(object);
+		notifyObjectAdded();
+	}
+	void prepend(const Object &object)
+	{
+		notifyAboutToAddObject(0);
+		m_objects.prepend(object);
+		notifyObjectAdded();
+	}
+	void insert(const Object &object, const int index)
+	{
+		if (index >= size())
+		{
+			prepend(object);
+		}
+		else if (index <= 0)
+		{
+			append(object);
+		}
+		else
+		{
+			notifyAboutToAddObject(index);
+			m_objects.insert(index, object);
+			notifyObjectAdded();
+		}
+	}
+	void remove(const int index)
+	{
+		notifyAboutToRemoveObject(index);
+		m_objects.removeAt(index);
+		notifyObjectRemoved();
+	}
+	Object get(const int index) const
+	{
+		return m_objects.at(index);
+	}
+
+private:
+	friend class CommonModel;
+	QVariant get(const int index, const int entry, const int role) const override
+	{
+		if (m_entries.size() < entry || !m_entries[entry].second.contains(role))
+		{
+			return QVariant();
+		}
+		return m_entries[entry].second.value(role)->get(m_objects.at(index));
+	}
+	bool set(const int index, const int entry, const int role, const QVariant &value) override
+	{
+		if (m_entries.size() < entry || !m_entries[entry].second.contains(role))
+		{
+			return false;
+		}
+		IEntry *e = m_entries[entry].second.value(role);
+		if (!e->canSet())
+		{
+			return false;
+		}
+		e->set(m_objects[index], value);
+		return true;
+	}
+	bool canSet(const int entry) const override
+	{
+		if (m_entries.size() < entry || !m_entries[entry].second.contains(Qt::EditRole))
+		{
+			return false;
+		}
+		IEntry *e = m_entries[entry].second.value(Qt::EditRole);
+		return e->canSet();
+	}
+
+	QString entryTitle(const int entry) const override
+	{
+		return m_entries.at(entry).first;
+	}
+
+private:
+	struct IEntry
+	{
+		virtual ~IEntry() {}
+		virtual void set(Object &object, const QVariant &value) = 0;
+		virtual QVariant get(const Object &object) const = 0;
+		virtual bool canSet() const = 0;
+	};
+	template<typename T>
+	struct VariableEntry : public IEntry
+	{
+		typedef T (Object::*Member);
+
+		explicit VariableEntry(Member member)
+			: m_member(member) {}
+
+		void set(Object &object, const QVariant &value) override
+		{
+			object.*m_member = value.value<T>();
+		}
+		QVariant get(const Object &object) const override
+		{
+			return QVariant::fromValue<T>(object.*m_member);
+		}
+		bool canSet() const override { return true; }
+
+	private:
+		Member m_member;
+	};
+	template<typename T>
+	struct FunctionEntry : public IEntry
+	{
+		typedef T (Object::*Getter)() const;
+		typedef void (Object::*Setter)(T);
+
+		explicit FunctionEntry(Getter getter, Setter setter)
+			: m_getter(m_getter), m_setter(m_setter) {}
+
+		void set(Object &object, const QVariant &value) override
+		{
+			object.*m_setter(value.value<T>());
+		}
+		QVariant get(const Object &object) const override
+		{
+			return QVariant::fromValue<T>(object.*m_getter());
+		}
+		bool canSet() const override { return !!m_setter; }
+
+	private:
+		Getter m_getter;
+		Setter m_setter;
+	};
+
+	QList<Object> m_objects;
+	QVector<QPair<QString, QMap<int, IEntry *>>> m_entries;
+
+	void addEntryInternal(IEntry *e, const int entry, const int role)
+	{
+		if (m_entries.size() <= entry)
+		{
+			m_entries.resize(entry + 1);
+		}
+		m_entries[entry].second.insert(role, e);
+	}
+
+protected:
+	template<typename Getter, typename Setter>
+	typename std::enable_if<std::is_member_function_pointer<Getter>::value && std::is_member_function_pointer<Getter>::value, void>::type
+	addEntry(Getter getter, Setter setter, const int entry, const int role)
+	{
+		addEntryInternal(new FunctionEntry<typename std::result_of<Getter>::type>(getter, setter), entry, role);
+	}
+	template<typename Getter>
+	typename std::enable_if<std::is_member_function_pointer<Getter>::value, void>::type
+	addEntry(Getter getter, const int entry, const int role)
+	{
+		addEntryInternal(new FunctionEntry<typename std::result_of<Getter>::type>(getter, nullptr), entry, role);
+	}
+	template<typename T>
+	typename std::enable_if<!std::is_member_function_pointer<T (Object::*)>::value, void>::type
+	addEntry(T (Object::*member), const int entry, const int role)
+	{
+		addEntryInternal(new VariableEntry<T>(member), entry, role);
+	}
+
+	void setEntryTitle(const int entry, const QString &title)
+	{
+		m_entries[entry].first = title;
+	}
+};
+template<typename Object>
+class AbstractCommonModel<Object *> : public BaseAbstractCommonModel
+{
+public:
+	explicit AbstractCommonModel(const Qt::Orientation orientation)
+		: BaseAbstractCommonModel(orientation) {}
+	virtual ~AbstractCommonModel()
+	{
+		qDeleteAll(m_objects);
+	}
+
+	int size() const override { return m_objects.size(); }
+	int entryCount() const override { return m_entries.size(); }
+
+	void append(Object *object)
+	{
+		notifyAboutToAddObject(size());
+		m_objects.append(object);
+		notifyObjectAdded();
+	}
+	void prepend(Object *object)
+	{
+		notifyAboutToAddObject(0);
+		m_objects.prepend(object);
+		notifyObjectAdded();
+	}
+	void insert(Object *object, const int index)
+	{
+		if (index >= size())
+		{
+			prepend(object);
+		}
+		else if (index <= 0)
+		{
+			append(object);
+		}
+		else
+		{
+			notifyAboutToAddObject(index);
+			m_objects.insert(index, object);
+			notifyObjectAdded();
+		}
+	}
+	void remove(const int index)
+	{
+		notifyAboutToRemoveObject(index);
+		m_objects.removeAt(index);
+		notifyObjectRemoved();
+	}
+	Object *get(const int index) const
+	{
+		return m_objects.at(index);
+	}
+	int find(Object * const obj) const
+	{
+		return m_objects.indexOf(obj);
+	}
+
+	QList<Object *> getAll() const
+	{
+		return m_objects;
+	}
+
+private:
+	friend class CommonModel;
+	QVariant get(const int index, const int entry, const int role) const override
+	{
+		if (m_entries.size() < entry || !m_entries[entry].second.contains(role))
+		{
+			return QVariant();
+		}
+		return m_entries[entry].second.value(role)->get(m_objects.at(index));
+	}
+	bool set(const int index, const int entry, const int role, const QVariant &value) override
+	{
+		if (m_entries.size() < entry || !m_entries[entry].second.contains(role))
+		{
+			return false;
+		}
+		IEntry *e = m_entries[entry].second.value(role);
+		if (!e->canSet())
+		{
+			return false;
+		}
+		e->set(m_objects[index], value);
+		return true;
+	}
+	bool canSet(const int entry) const override
+	{
+		if (m_entries.size() < entry || !m_entries[entry].second.contains(Qt::EditRole))
+		{
+			return false;
+		}
+		IEntry *e = m_entries[entry].second.value(Qt::EditRole);
+		return e->canSet();
+	}
+
+	QString entryTitle(const int entry) const override
+	{
+		return m_entries.at(entry).first;
+	}
+
+private:
+	struct IEntry
+	{
+		virtual ~IEntry() {}
+		virtual void set(Object *object, const QVariant &value) = 0;
+		virtual QVariant get(Object *object) const = 0;
+		virtual bool canSet() const = 0;
+	};
+	template<typename T>
+	struct VariableEntry : public IEntry
+	{
+		typedef T (Object::*Member);
+
+		explicit VariableEntry(Member member)
+			: m_member(member) {}
+
+		void set(Object *object, const QVariant &value) override
+		{
+			object->*m_member = value.value<T>();
+		}
+		QVariant get(Object *object) const override
+		{
+			return QVariant::fromValue<T>(object->*m_member);
+		}
+		bool canSet() const override { return true; }
+
+	private:
+		Member m_member;
+	};
+	template<typename T>
+	struct FunctionEntry : public IEntry
+	{
+		typedef T (Object::*Getter)() const;
+		typedef void (Object::*Setter)(T);
+
+		explicit FunctionEntry(Getter getter, Setter setter)
+			: m_getter(getter), m_setter(setter) {}
+
+		void set(Object *object, const QVariant &value) override
+		{
+			(object->*m_setter)(value.value<T>());
+		}
+		QVariant get(Object *object) const override
+		{
+			return QVariant::fromValue<T>((object->*m_getter)());
+		}
+		bool canSet() const override { return !!m_setter; }
+
+	private:
+		Getter m_getter;
+		Setter m_setter;
+	};
+	template<typename T>
+	struct LambdaEntry : public IEntry
+	{
+		using Getter = std::function<T(Object *)>;
+
+		explicit LambdaEntry(Getter getter)
+			: m_getter(getter) {}
+
+		void set(Object *object, const QVariant &value) override {}
+		QVariant get(Object *object) const override
+		{
+			return QVariant::fromValue<T>(m_getter(object));
+		}
+		bool canSet() const override { return false; }
+
+	private:
+		Getter m_getter;
+	};
+
+	QList<Object *> m_objects;
+	QVector<QPair<QString, QMap<int, IEntry *>>> m_entries;
+
+	void addEntryInternal(IEntry *e, const int entry, const int role)
+	{
+		if (m_entries.size() <= entry)
+		{
+			m_entries.resize(entry + 1);
+		}
+		m_entries[entry].second.insert(role, e);
+	}
+
+protected:
+	template<typename Getter, typename Setter>
+	typename std::enable_if<std::is_member_function_pointer<Getter>::value && std::is_member_function_pointer<Getter>::value, void>::type
+	addEntry(const int entry, const int role, Getter getter, Setter setter)
+	{
+		addEntryInternal(new FunctionEntry<typename std::result_of<Getter>::type>(getter, setter), entry, role);
+	}
+	template<typename T>
+	typename std::enable_if<std::is_member_function_pointer<typename FunctionEntry<T>::Getter>::value, void>::type
+	addEntry(const int entry, const int role, typename FunctionEntry<T>::Getter getter)
+	{
+		addEntryInternal(new FunctionEntry<T>(getter, nullptr), entry, role);
+	}
+	template<typename T>
+	typename std::enable_if<!std::is_member_function_pointer<T (Object::*)>::value, void>::type
+	addEntry(const int entry, const int role, T (Object::*member))
+	{
+		addEntryInternal(new VariableEntry<T>(member), entry, role);
+	}
+	template<typename T>
+	void addEntry(const int entry, const int role, typename LambdaEntry<T>::Getter lambda)
+	{
+		addEntryInternal(new LambdaEntry<T>(lambda), entry, role);
+	}
+
+	void setEntryTitle(const int entry, const QString &title)
+	{
+		m_entries[entry].first = title;
+	}
+
+	void setAll(const QList<Object *> objects)
+	{
+		notifyBeginReset();
+		qDeleteAll(m_objects);
+		m_objects = objects;
+		notifyEndReset();
+	}
+};