// -*- C++ -*-
/**
 * \file lyxfind.h
 * This file is part of LyX, the document processor.
 * Licence details can be found in the file COPYING.
 *
 * \author Lars Gullik Bjønnes
 * \author John Levon
 * \author Jürgen Vigna
 * \author Alfredo Braunstein
 * \author Tommaso Cucinotta
 *
 * Full author contact details are available in file CREDITS.
 */

#ifndef LYXFIND_H
#define LYXFIND_H

#include "support/strfwd.h"

// FIXME
#include "support/docstring.h"

namespace lyx {



class Buffer;
class Cursor;
class BufferView;
class DocIterator;
class FuncRequest;
class Text;

/** Encode the parameters needed to find \c search as a string
 *  that can be dispatched to the LyX core in a FuncRequest wrapper.
 */
docstring const find2string(docstring const & search,
			      bool casesensitive,
			      bool matchword,
			      bool forward);

/** Encode the parameters needed to replace \c search with \c replace
 *  as a string that can be dispatched to the LyX core in a FuncRequest
 *  wrapper.
 */
docstring const replace2string(docstring const & replace,
				 docstring const & search,
				 bool casesensitive,
				 bool matchword,
				 bool all,
				 bool forward,
				 bool findnext = true);

/** Parse the string encoding of the find request that is found in
 *  \c ev.argument and act on it.
 * The string is encoded by \c find2string.
 * \return true if the string was found.
 */
bool lyxfind(BufferView * bv, FuncRequest const & ev);

/** Parse the string encoding of the replace request that is found in
 *  \c ev.argument and act on it.
 * The string is encoded by \c replace2string.
 * \return whether we did anything
 */
bool lyxreplace(BufferView * bv, 
		FuncRequest const &, bool has_deleted = false);

/// find the next change in the buffer
bool findNextChange(BufferView * bv);

/// find the previous change in the buffer
bool findPreviousChange(BufferView * bv);

/// select change under the cursor
bool selectChange(Cursor & cur, bool forward = true);


class FindAndReplaceOptions {
public:
	typedef enum {
		S_BUFFER,
		S_DOCUMENT,
		S_OPEN_BUFFERS,
		S_ALL_MANUALS
	} SearchScope;
	typedef enum {
		R_EVERYTHING,
		R_ONLY_MATHS
	} SearchRestriction;
	FindAndReplaceOptions(
		docstring const & find_buf_name,
		bool casesensitive,
		bool matchword,
		bool forward,
		bool expandmacros,
		bool ignoreformat,
		docstring const & repl_buf_name,
		bool keep_case,
		SearchScope scope = S_BUFFER,
		SearchRestriction restr = R_EVERYTHING
	);
	FindAndReplaceOptions() : casesensitive(false), matchword(false), forward(false),
	                          expandmacros(false), ignoreformat(false),
							  keep_case(false), scope(S_BUFFER), restr(R_EVERYTHING) {}
	docstring find_buf_name;
	bool casesensitive;
	bool matchword;
	bool forward;
	bool expandmacros;
	bool ignoreformat;
	/// This is docstring() if no replace was requested
	docstring repl_buf_name;
	bool keep_case;
	SearchScope scope;
	SearchRestriction restr;
};

/// Write a FindAdvOptions instance to a stringstream
std::ostringstream & operator<<(std::ostringstream & os, lyx::FindAndReplaceOptions const & opt);

/// Read a FindAdvOptions instance from a stringstream
std::istringstream & operator>>(std::istringstream & is, lyx::FindAndReplaceOptions & opt);

/// Perform a FindAdv operation.
bool findAdv(BufferView * bv, FindAndReplaceOptions const & opt);
	
/** Computes the simple-text or LaTeX export (depending on opt) of buf starting
 ** from cur and ending len positions after cur, if len is positive, or at the
 ** paragraph or innermost inset end if len is -1.
 **
 ** This is useful for computing opt.search from the SearchAdvDialog controller (ControlSearchAdv).
 ** Ideally, this should not be needed, and the opt.search field should become a Text const &.
 **/
docstring stringifyFromForSearch(
	FindAndReplaceOptions const & opt,
	DocIterator const & cur,
	int len = -1);

} // namespace lyx

#endif // LYXFIND_H