// Copyright (c) 2010, Thomas Goyne
// All rights reserved.
//
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// modification, are permitted provided that the following conditions are met:
//
//   * Redistributions of source code must retain the above copyright notice,
//     this list of conditions and the following disclaimer.
//   * Redistributions in binary form must reproduce the above copyright notice,
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// Aegisub Project http://www.aegisub.org/
//
// $Id$

/// @file text_file_reader.h
/// @see text_file_reader.cpp
/// @ingroup utility
///

#pragma once

#ifndef AGI_PRE
#include <fstream>
#include <memory>

#include <wx/dynarray.h>
#include <wx/string.h>
#endif

#include <libaegisub/line_iterator.h>

/// @class TextFileReader
/// @brief A line-based text file reader
class TextFileReader {
	std::auto_ptr<std::ifstream> file;
	bool trim;
	agi::line_iterator<wxString> iter;

	TextFileReader(const TextFileReader&);
	TextFileReader& operator=(const TextFileReader&);

public:
	/// @brief Constructor
	/// @param filename File to open
	/// @param enc      Encoding to use, or empty to autodetect
	/// @param trim     Whether to trim whitespace from lines read
	TextFileReader(wxString const& filename,wxString encoding="", bool trim=true);
	/// @brief Destructor
	~TextFileReader();

	/// @brief Read a line from the file
	/// @return The line, possibly trimmed
	wxString ReadLineFromFile();
	/// @brief Check if there are any more lines to read
	bool HasMoreLines() const { return iter != agi::line_iterator<wxString>(); }
};