/***************************************************************************
 *   Copyright (C) 2005 by David Saxton                                    *
 *   david@bluehaze.org                                                    *
 *                                                                         *
 *   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 2 of the License, or     *
 *   (at your option) any later version.                                   *
 ***************************************************************************/

#ifndef FILEMETAINFO_H
#define FILEMETAINFO_H

#include "outputmethoddlg.h"


class TextDocument;
class TextView;
class KConfig;
typedef QValueList<int> IntList;

class MetaInfo
{
	public:
		MetaInfo();
		
		/**
		 * Returns true if all the data stored is default; and therefore does
		 * not need saving.
		 */
		bool hasDefaultData() const;
		/**
		 * Writes to the given config the data stored in here. Does not set the
		 * group.
		 */
		void save( KConfig * conf );
		/**
		 * Reads in the data from the config. Does not set the group.
		 */
		void load( KConfig * conf );
		
		IntList bookmarks() const { return m_bookmarks; }
		void setBookmarks( IntList bookmarks ) { m_bookmarks = bookmarks; }
		
		IntList breakpoints() const { return m_breakpoints; }
		void setBreakpoints( IntList breakpoints ) { m_breakpoints = breakpoints; }
		
		OutputMethodInfo & outputMethodInfo() { return m_outputMethodInfo; }
		void setOutputMethodInfo( OutputMethodInfo info ) { m_outputMethodInfo = info; }
		
		unsigned cursorLine() const { return m_cursorLine; }
		void setCursorLine( unsigned line ) { m_cursorLine = line; }
		
		unsigned cursorColumn() const { return m_cursorColumn; }
		void setCursorColumn( unsigned column ) { m_cursorColumn = column; }
		
	protected:
		/**
		 * Convert the id (e.g. "Direct") to a method, used when reading in the
		 * config file.
		 */
		OutputMethodInfo::Method::Type toMethod( const QString & id );
		/**
		 * Conver the method (e.g. OutputMethodInfo::Method::Direct) to an id
		 * that can be saved in the config file.
		 */
		QString toID( OutputMethodInfo::Method::Type method );
		
		IntList m_bookmarks;
		IntList m_breakpoints;
		OutputMethodInfo m_outputMethodInfo;
		unsigned m_cursorLine;
		unsigned m_cursorColumn;
};
typedef QMap<KURL,MetaInfo> MetaInfoMap;

/**
Looks after per-file metainfo; e.g. bookmarks, breakpoints, compiling options, etc

@author David Saxton
*/
class FileMetaInfo : public QObject
{
	Q_OBJECT
	public:
		~FileMetaInfo();
	
		/**
		 * Initialize the TextDocument with the appropriate stored metainfo - e.g.
		 * setting the appopriate bookmarks, etc
		 */
		void initializeFromMetaInfo( const KURL & url, TextDocument * textDocument );
		/**
		 * Initialize the TextView with the appropriate stored metainfo - e.g.
		 * setting the appopriate cursor position, etc.
		 */
		void initializeFromMetaInfo( const KURL & url, TextView * textView );
		/**
		 * Initialize the OutputMethodDlg with the options the user had selected
		 * for the last time it was used for the given url.
		 */
		void initializeFromMetaInfo( const KURL & url, OutputMethodDlg * outputMethodDlg );
		/**
		 * Get the bookmarks, etc from the given TextDocument, and save them
		 */
		void grabMetaInfo( const KURL & url, TextDocument * textDocument );
		/**
		 * Get the cursor position, etc from the given TextView, and save them.
		 */
		void grabMetaInfo( const KURL & url, TextView * textView );
		/**
		 * Get the output method et al from the given OutputMethodDlg, and save
		 * them.
		 */
		void grabMetaInfo( const KURL & url, OutputMethodDlg * outputMethodDlg );
		/**
		 * Save all metainfo to disk.
		 */
		void saveAllMetaInfo();

	protected:
		/**
		 * Load all metainfo from disk (combining that read in with those already
		 * loaded)
		 */
		void loadAllMetaInfo();
	
		KConfig *m_metaInfoConfig;
	
	private:
		FileMetaInfo();
		friend inline FileMetaInfo* fileMetaInfo();
	
		MetaInfoMap m_metaInfoMap;
};

inline FileMetaInfo* fileMetaInfo()
{
	static FileMetaInfo *fmi = new FileMetaInfo();
	return fmi;
}

#endif
