lyx_mirror/src/insets/insetbase.h

// -*- C++ -*-
/**
 * \file insetbase.h
 * This file is part of LyX, the document processor.
 * Licence details can be found in the file COPYING.
 *
 * \author none
 *
 * Full author contact details are available in file CREDITS
 */

#ifndef INSETBASE_H
#define INSETBASE_H

#include <vector>

class BufferView;
class FuncRequest;
class MetricsInfo;
class PainterInfo;

/** Dispatch result codes
		DISPATCHED          = the inset catched the action
		DISPATCHED_NOUPDATE = the inset catched the action and no update
				is needed here to redraw the inset
		FINISHED            = the inset must be unlocked as a result
				of the action
		FINISHED_RIGHT      = FINISHED, but put the cursor to the RIGHT of
				the inset.
		FINISHED_UP         = FINISHED, but put the cursor UP of
				the inset.
		FINISHED_DOWN       = FINISHED, but put the cursor DOWN of
				the inset.
		UNDISPATCHED        = the action was not catched, it should be
				dispatched by lower level insets
*/
enum dispatch_result {
	UNDISPATCHED = 0,
	DISPATCHED,
	DISPATCHED_NOUPDATE,
	FINISHED,
	FINISHED_RIGHT,
	FINISHED_UP,
	FINISHED_DOWN,
	DISPATCHED_POP
};


/// Common base class to all insets
class InsetBase {
public:
	/// type for cell indices
	typedef size_t                   idx_type;
	/// type for cursor positions
	typedef size_t                   pos_type;
	/// type for row numbers
	typedef size_t                   row_type;
	/// type for column numbers
	typedef size_t                   col_type;

	// the real dispatcher
	virtual dispatch_result dispatch
		(FuncRequest const & cmd, idx_type & idx, pos_type & pos);

	/// small wrapper for the time being
	virtual dispatch_result localDispatch(FuncRequest const & cmd);
	///
	virtual void draw(PainterInfo & pi, int x, int y) const = 0;

	///
	virtual ~InsetBase() {}

	/// Methods to cache and retrieve a cached BufferView.
	virtual void cache(BufferView *) const {}
	///
	virtual BufferView * view() const { return 0; }
};

#endif