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/*
* LiberTI - TI-like calculator designed for LibreCalc
* Copyright (C) 2016 Delwink, LLC
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, version 3 only.
*
* 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef DELWINK_LIBERTI_STATE_H
#define DELWINK_LIBERTI_STATE_H
#include "tibexpr.h"
#include "tibtype.h"
#define MAX_HISTORY 35
enum action_state
{
STATE_NORMAL,
STATE_2ND,
STATE_ALPHA,
NUM_ACTION_STATES
};
struct history
{
struct tib_expr entry;
struct tib_expr answer_string;
TIB *answer;
};
struct state
{
struct history history[MAX_HISTORY];
struct tib_expr entry;
enum action_state action_state;
int entry_cursor;
unsigned int history_len;
bool blink_state;
bool insert_mode;
};
int
load_state (struct state *dest, const char *path);
int
save_state (const struct state *state, const char *path);
void
state_destroy (struct state *state);
void
entry_move_cursor (struct state *state, int distance);
int
entry_write (struct state *state, int c);
int
entry_recall (struct state *state);
void
change_action_state (struct state *state, enum action_state action_state);
int
state_calc_entry (struct state *state);
int
state_add_history (struct state *state, const struct tib_expr *in,
const TIB *answer);
void
state_clear_history (struct state *state);
#endif
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