basemodel.h

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#ifndef BaseModel_H
#define BaseModel_H

#include <QAbstractItemModel>

#include <QIODevice>

class QAbstractItemDelegate;

#include "niftypes.h"
#include "nifitem.h"

#include "message.h"

//! \file basemodel.h BaseModel

//! Base class for nif and kfm models, which store files in memory.
/*!
 * This class serves as an abstract base class for NifModel and KfmModel
 * classes.
 */
class BaseModel : public QAbstractItemModel
{
Q_OBJECT
public:
	//! Constructor
	BaseModel( QObject * parent = 0 );
	//! Destructor
	~BaseModel();
	
	//! Clear model data.
	virtual void clear() = 0;
	
	//! Load from file.
	bool loadFromFile( const QString & filename );
	//! Save to file.
	bool saveToFile( const QString & filename ) const;
	
	//! Generic load from QIODevice.
	virtual bool load( QIODevice & device ) = 0;
	//! Generic save to QIODevice.
	virtual bool save( QIODevice & device ) const = 0;
	
	//! If the model was loaded from a file then getFolder returns the folder.
	/*!
	 * This function is used to resolve external resources.
	 * \return The folder of the last file that was loaded with loadFromFile.
	 */
	QString getFolder() const { return folder; }
	
	//! Return true if the index pointed to is an array.
	/*!
	 * \param array The index to check.
	 * \return true if the index is an array.
	 */
	bool isArray( const QModelIndex & iArray ) const;
	//! Update the size of an array (append or remove items).
	/*!
	 * \param array The index of the array whose size to update.
	 * \return true if the update succeeded, false otherwise.
	 */
	bool updateArray( const QModelIndex & iArray );
	//! Update the size of an array by name.
	bool updateArray( const QModelIndex & parent, const QString & name );
	//! Get an model index array as a QVector.
	/*!
	 * \param array The index of the array to get.
	 * \return The array as QVector.
	 */
	template <typename T> QVector<T> getArray( const QModelIndex & iArray ) const;
	//! Get an model index array as a QVector by name.
	template <typename T> QVector<T> getArray( const QModelIndex & iArray, const QString & name ) const;
	//! Write a QVector to a model index array.
	template <typename T> void setArray( const QModelIndex & iArray, const QVector<T> & array );
	//! Write a QVector to a model index array by name.
	template <typename T> void setArray( const QModelIndex & iArray, const QString & name, const QVector<T> & array );
	
	//! Get an item.
	template <typename T> T get( const QModelIndex & index ) const;
	//! Get an item by name.
	template <typename T> T get( const QModelIndex & parent, const QString & name ) const;
	//! Set an item.
	template <typename T> bool set( const QModelIndex & index, const T & d );
	//! Set an item by name.
	template <typename T> bool set( const QModelIndex & parent, const QString & name, const T & v );
	
	//! Get an item as a NifValue.
	NifValue getValue( const QModelIndex & index ) const;
	/* Not implemented? */
	// Get an item as a NifValue by name.
	//NifValue getValue( const QModelIndex & parent, const QString & name ) const;
	
	//! Set an item from a NifValue.
	bool setValue( const QModelIndex & index, const NifValue & v );
	//! Set an item from a NifValue by name.
	bool setValue( const QModelIndex & parent, const QString & name, const NifValue & v );
	
	// get item attributes
	//! Get the item name.
	QString  itemName( const QModelIndex & index ) const;
	//! Get the item type string.
	QString  itemType( const QModelIndex & index ) const;
	//! Get the item argument string.
	QString  itemArg( const QModelIndex & index ) const;
	//! Get the item arr1 string.
	QString  itemArr1( const QModelIndex & index ) const;
	//! Get the item arr2 string.
	QString  itemArr2( const QModelIndex & index ) const;
	//! Get the item condition string.
	QString  itemCond( const QModelIndex & index ) const;
	//! Get the item first version.
	quint32  itemVer1( const QModelIndex & index ) const;
	//! Get the item last version.
	quint32  itemVer2( const QModelIndex & index ) const;
	//! Get the item documentation.
	QString  itemText( const QModelIndex & index ) const;
	//! Get the item template string.
	QString  itemTmplt( const QModelIndex & index ) const;
	
	//! Find a branch by name.
	QModelIndex getIndex( const QModelIndex & parent, const QString & name ) const;
	
	//! Evaluate condition and version.
	bool evalCondition( const QModelIndex & idx, bool chkParents = false ) const;
	//! Evaluate version.
	bool evalVersion( const QModelIndex & idx, bool chkParents = false ) const;
	
	//! Get version as a string
	virtual QString getVersion() const = 0;
	//! Get version as a number
	virtual quint32 getVersionNumber() const = 0;
	
	//! Column names
	enum {
		NameCol  = 0,
		TypeCol  = 1,
		ValueCol = 2,
		ArgCol   = 3,
		Arr1Col  = 4,
		Arr2Col  = 5,
		CondCol  = 6,
		Ver1Col  = 7,
		Ver2Col  = 8,
		VerCondCol  = 9,
		NumColumns = 10,
	};
	
	// QAbstractModel interface
	//! Creates a model index for the given row and column
	/*!
	 * \see QAbstractItemModel::createIndex()
	 */
	QModelIndex index( int row, int column, const QModelIndex & parent = QModelIndex() ) const;
	//! Finds the parent of the specified index
	QModelIndex parent( const QModelIndex & index ) const;
	
	//! Finds the number of rows
	int rowCount( const QModelIndex & parent = QModelIndex() ) const;
	//! Finds the number of columns
	int columnCount( const QModelIndex & parent = QModelIndex() ) const { Q_UNUSED(parent); return NumColumns; }
	
	//! Finds the data associated with an index
	/*!
	 * \param index The index to find data for
	 * \param role The Qt::ItemDataRole to get data for
	 */
	QVariant data( const QModelIndex & index, int role = Qt::DisplayRole ) const;
	//! Sets data associated with an index
	/*!
	 * \param index The index to set data for
	 * \param value The data to set
	 * \param role The Qt::ItemDataRole to use
	 */
	bool setData( const QModelIndex & index, const QVariant & value, int role = Qt::EditRole );
	
	//! Get the header data for a section
	QVariant headerData( int section, Qt::Orientation orientation, int role = Qt::DisplayRole ) const;
	
	//! Finds the flags for an index
	Qt::ItemFlags flags( const QModelIndex & index ) const;
	
	//! Message mode
	enum MsgMode
	{
		EmitMessages, CollectMessages
	};
	
	//! Set the Message mode
	void setMessageMode( MsgMode m ) { msgMode = m; }
	//! Get Messages collected
	QList<Message> getMessages() const { QList<Message> lst = messages; messages.clear(); return lst; }
	
signals:
	//! Messaging signal
	void sigMessage( const Message & msg ) const;
	//! Progress signal
	void sigProgress( int c, int m ) const;
	
protected:
	//! Update an array item
	virtual bool		updateArrayItem( NifItem * array, bool fast ) = 0;
	//! Get the size of an array
	int			getArraySize( NifItem * array ) const;
	//! Evaluate a string for an array
	int			evaluateString( NifItem * array, const QString & text ) const;
	
	//! Get an item
	virtual NifItem *	getItem( NifItem * parent, const QString & name ) const;
	//! Get an item by name
	NifItem *	getItemX( NifItem * item, const QString & name ) const; // find upwards
	
	//! Get an item by name
	template <typename T> T get( NifItem * parent, const QString & name ) const;
	//! Get an item
	template <typename T> T get( NifItem * item ) const;
	
	//! Set an item by name
	template <typename T> bool set( NifItem * parent, const QString & name, const T & d );
	//! Set an item
	template <typename T> bool set( NifItem * item, const T & d );
	//! Set an item value
	virtual bool setItemValue( NifItem * item, const NifValue & v ) = 0;
	//! Set an item value by name
	bool setItemValue( NifItem * parent, const QString & name, const NifValue & v );
	
	//! Evaluate version
	virtual bool		evalVersion( NifItem * item, bool chkParents = false ) const = 0;
	//! Evaluate conditions
	bool		evalCondition( NifItem * item, bool chkParents = false ) const;
	//! Evaluate conditions
	bool		evalConditionHelper( NifItem * item, const QString & cond ) const;
	
	//! Convert a version number to a string
	virtual QString ver2str( quint32 ) const = 0;
	//! Convert a version string to a number
	virtual quint32 str2ver( QString ) const = 0;
	
	//! Set the header string
	virtual bool setHeaderString( const QString & ) = 0;
	
	//! The root item
	NifItem *	root;
	
	//! The filepath of the model
	QString folder;
	
	//! The messaging mode
	MsgMode msgMode;
	//! A list of messages
	mutable QList<Message> messages;
	
	//! Handle a message
	void msg( const Message & m ) const;
	
	friend class NifIStream;
	friend class NifOStream;
	friend class BaseModelEval;
}; // class BaseModel


template <typename T> inline T BaseModel::get( NifItem * parent, const QString & name ) const
{
	NifItem * item = getItem( parent, name );
	if ( item )
		return item->value().get<T>();
	else
		return T();
}

template <typename T> inline T BaseModel::get( const QModelIndex & parent, const QString & name ) const
{
	NifItem * parentItem = static_cast<NifItem*>( parent.internalPointer() );
	if ( ! ( parent.isValid() && parentItem && parent.model() == this ) )
		return T();
	
	NifItem * item = getItem( parentItem, name );
	if ( item )
		return item->value().get<T>();
	else
		return T();
}

template <typename T> inline bool BaseModel::set( NifItem * parent, const QString & name, const T & d )
{
	NifItem * item = getItem( parent, name );
	if ( item )
		return set( item, d );
	else
		return false;
}

template <typename T> inline bool BaseModel::set( const QModelIndex & parent, const QString & name, const T & d )
{
	NifItem * parentItem = static_cast<NifItem*>( parent.internalPointer() );
	if ( ! ( parent.isValid() && parentItem && parent.model() == this ) )
		return false;
	
	NifItem * item = getItem( parentItem, name );
	if ( item )
		return set( item, d );
	else
		return false;
}

template <typename T> inline T BaseModel::get( NifItem * item ) const
{
	return item->value().get<T>();
}

template <typename T> inline T BaseModel::get( const QModelIndex & index ) const
{
	NifItem * item = static_cast<NifItem*>( index.internalPointer() );
	if ( ! ( index.isValid() && item && index.model() == this ) )
		return T();
	
	return item->value().get<T>();
}

template <typename T> inline bool BaseModel::set( NifItem * item, const T & d )
{
	if ( item->value().set( d ) )
	{
		emit dataChanged( createIndex( item->row(), ValueCol, item ), createIndex( item->row(), ValueCol, item ) );
		return true;
	}
	else
		return false;
}

template <typename T> inline bool BaseModel::set( const QModelIndex & index, const T & d )
{
	NifItem * item = static_cast<NifItem*>( index.internalPointer() );
	if ( ! ( index.isValid() && item && index.model() == this ) )	return false;
	return set( item, d );
}

template <typename T> inline QVector<T> BaseModel::getArray( const QModelIndex & iArray ) const
{
	NifItem * item = static_cast<NifItem*>( iArray.internalPointer() );
	if ( isArray( iArray ) && item && iArray.model() == this )
		return item->getArray<T>();
	return QVector<T>();
}

template <typename T> inline QVector<T> BaseModel::getArray( const QModelIndex & iParent, const QString & name ) const
{
	return getArray<T>( getIndex( iParent, name ) );
}

template <typename T> inline void BaseModel::setArray( const QModelIndex & iArray, const QVector<T> & array )
{
	NifItem * item = static_cast<NifItem*>( iArray.internalPointer() );
	if ( isArray( iArray ) && item && iArray.model() == this )
	{
		item->setArray<T>( array );
		int x = item->childCount() - 1;
		if ( x >= 0 )
			emit dataChanged( createIndex( 0, ValueCol, item->child( 0 ) ), createIndex( x, ValueCol, item->child( x ) ) );
	}
}

template <typename T> inline void BaseModel::setArray( const QModelIndex & iParent, const QString & name, const QVector<T> & array )
{
	setArray<T>( getIndex( iParent, name ), array );
}

#endif