// -*- C++ -*-
/**
 * \file VSpace.h
 * This file is part of LyX, the document processor.
 * Licence details can be found in the file COPYING.
 *
 * \author Matthias Ettrich
 *
 * Full author contact details are available in file CREDITS.
 */

#ifndef VSPACE_H
#define VSPACE_H

#include "Length.h"


namespace lyx {


class BufferParams;
class BufferView;


/// A class representing latex vertical spacing
class VSpace {
public:
	/// The different kinds of spaces.
	enum VSpaceKind {
		DEFSKIP,
		SMALLSKIP,
		MEDSKIP,
		BIGSKIP,
		VFILL,
		LENGTH ///< user-defined length
	};

	///
	VSpace();
	///
	explicit VSpace(VSpaceKind k);
	///
	explicit VSpace(Length const & l);
	///
	explicit VSpace(GlueLength const & l);

	/// Constructor for reading from a .lyx file
	explicit VSpace(std::string const & data);

	/// return the type of vertical space
	VSpaceKind kind() const { return kind_; }
	/// return the length of this space
	GlueLength const & length() const { return len_; }

	// a flag that switches between \vspace and \vspace*
	bool keep() const { return keep_; }
	/// if set true, use \vspace* when type is not DEFSKIP
	void setKeep(bool keep) { keep_ = keep; }
	///
	bool operator==(VSpace const &) const;

	// conversion

	/// how it goes into the LyX file
	std::string const asLyXCommand() const;
	/// the latex representation
	std::string const asLatexCommand(BufferParams const & params) const;
	/// how it is seen in the LyX window
	docstring const asGUIName() const;
	/// the size of the space on-screen
	int inPixels(BufferView const & bv) const;

private:
	/// This VSpace kind
	VSpaceKind kind_;
	/// the specified length
	GlueLength len_;
	/// if true, use \vspace* type
	bool keep_;
};


} // namespace lyx

#endif // VSPACE_H