/*  Copyright (c) 1987-2008 Sun Microsystems, Inc. All Rights Reserved.
 *  Copyright (c) 2008-2009 Robert Ancell
 *
 *  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, or (at your option)
 *  any later version.
 *
 *  This program is distributed in the hope that it will be useful, but
 *  WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 *  General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 *  02111-1307, USA.
 */

#ifndef MATH_EQUATION_H
#define MATH_EQUATION_H

#include <glib-object.h>
#include <gtk/gtk.h>
#include "mp.h"
#include "math-variables.h"

G_BEGIN_DECLS

#define MATH_EQUATION(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), math_equation_get_type(), MathEquation))

typedef struct MathEquationPrivate MathEquationPrivate;

typedef struct
{
    GtkTextBuffer parent_instance;
    MathEquationPrivate *priv;
} MathEquation;

typedef struct
{
    GtkTextBufferClass parent_class;
} MathEquationClass;

/* Number display mode. */
typedef enum {
  FIX,
  SCI,
  ENG
} DisplayFormat;

typedef enum {
    NORMAL,
    SUPERSCRIPT,
    SUBSCRIPT
} NumberMode;

GType math_equation_get_type(void);
MathEquation *math_equation_new(void);

MathVariables *math_equation_get_variables(MathEquation *equation);

const gchar *math_equation_get_digit_text(MathEquation *equation, guint digit);
const gchar *math_equation_get_numeric_point_text(MathEquation *equation);
const gchar *math_equation_get_thousands_separator_text(MathEquation *equation);

void math_equation_set_status(MathEquation *equation, const gchar *status);
const gchar *math_equation_get_status(MathEquation *equation);

gboolean math_equation_is_empty(MathEquation *equation);
gboolean math_equation_is_result(MathEquation *equation);
gchar *math_equation_get_display(MathEquation *equation);
gchar *math_equation_get_equation(MathEquation *equation);
gboolean math_equation_get_number(MathEquation *equation, MPNumber *z);

void math_equation_set_number_mode(MathEquation *equation, NumberMode mode);
NumberMode math_equation_get_number_mode(MathEquation *equation);

void math_equation_set_accuracy(MathEquation *equation, gint accuracy);
gint math_equation_get_accuracy(MathEquation *equation);

void math_equation_set_show_thousands_separators(MathEquation *equation, gboolean visible);
gboolean math_equation_get_show_thousands_separators(MathEquation *equation);

void math_equation_set_show_trailing_zeroes(MathEquation *equation, gboolean visible);
gboolean math_equation_get_show_trailing_zeroes(MathEquation *equation);

void math_equation_set_number_format(MathEquation *equation, DisplayFormat format);
DisplayFormat math_equation_get_number_format(MathEquation *equation);

void math_equation_set_base(MathEquation *equation, gint base);
gint math_equation_get_base(MathEquation *equation);

void math_equation_set_word_size(MathEquation *equation, gint word_size);
gint math_equation_get_word_size(MathEquation *equation);

void math_equation_set_angle_units(MathEquation *equation, MPAngleUnit angle_unit);
MPAngleUnit math_equation_get_angle_units(MathEquation *equation);

void math_equation_set_source_currency(MathEquation *equation, const gchar *currency);
const gchar *math_equation_get_source_currency(MathEquation *equation);

void math_equation_set_target_currency(MathEquation *equation, const gchar *currency);
const gchar *math_equation_get_target_currency(MathEquation *equation);

const MPNumber *math_equation_get_answer(MathEquation *equation);

void math_equation_copy(MathEquation *equation);
void math_equation_paste(MathEquation *equation);
void math_equation_undo(MathEquation *equation);
void math_equation_redo(MathEquation *equation);
void math_equation_store(MathEquation *equation, const gchar *name);
void math_equation_recall(MathEquation *equation, const gchar *name);
void math_equation_set(MathEquation *equation, const gchar *text);
void math_equation_set_number(MathEquation *equation, const MPNumber *x);
void math_equation_insert(MathEquation *equation, const gchar *text);
void math_equation_insert_digit(MathEquation *equation, guint digit);
void math_equation_insert_numeric_point(MathEquation *equation);
void math_equation_insert_number(MathEquation *equation, const MPNumber *x);
void math_equation_insert_subtract(MathEquation *equation);
void math_equation_insert_exponent(MathEquation *equation);
void math_equation_solve(MathEquation *equation);
void math_equation_factorize(MathEquation *equation);
void math_equation_delete(MathEquation *equation);
void math_equation_backspace(MathEquation *equation);
void math_equation_clear(MathEquation *equation);
void math_equation_shift(MathEquation *equation, gint count);
void math_equation_toggle_bit(MathEquation *equation, guint bit);

//FIXME: Obsolete
void display_make_number(MathEquation *equation, char *target, int target_len, const MPNumber *x);

#endif /* MATH_EQUATION_H */