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/*
 * screen.c
 * vim: expandtab:ts=4:sts=4:sw=4
 *
 * Copyright (C) 2012 - 2019 James Booth <boothj5@gmail.com>
 *
 * This file is part of Profanity.
 *
 * Profanity 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 3 of the License, or
 * (at your option) any later version.
 *
 * Profanity 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 Profanity.  If not, see <https://www.gnu.org/licenses/>.
 *
 * In addition, as a special exception, the copyright holders give permission to
 * link the code of portions of this program with the OpenSSL library under
 * certain conditions as described in each individual source file, and
 * distribute linked combinations including the two.
 *
 * You must obey the GNU General Public License in all respects for all of the
 * code used other than OpenSSL. If you modify file(s) with this exception, you
 * may extend this exception to your version of the file(s), but you are not
 * obligated to do so. If you do not wish to do so, delete this exception
 * statement from your version. If you delete this exception statement from all
 * source files in the program, then also delete it here.
 *
 */

#include "config.h"

#ifdef HAVE_NCURSESW_NCURSES_H
#include <ncursesw/ncurses.h>
#elif HAVE_NCURSES_H
#include <ncurses.h>
#elif HAVE_CURSES_H
#include <curses.h>
#endif

#include "config/preferences.h"

int
_screen_line_row(int win_pos, int mainwin_pos)
{
    int wrows = getmaxy(stdscr);

    if (win_pos == 1) {
        return 0;
    }

    if (win_pos == 2) {
        int row = 1;
        if (mainwin_pos == 1) {
            row = wrows - 3;
        }

        return row;
    }

    if (win_pos == 3) {
        int row = 2;
        if (mainwin_pos == 1 || mainwin_pos == 2) {
            row = wrows - 2;
        }

        return row;
    }

    return wrows - 1;
}

int
screen_titlebar_row(void)
{
    ProfWinPlacement* placement = prefs_get_win_placement();
    int row = _screen_line_row(placement->titlebar_pos, placement->mainwin_pos);
    prefs_free_win_placement(placement);

    return row;
}

int
screen_statusbar_row(void)
{
    ProfWinPlacement* placement = prefs_get_win_placement();
    int row = _screen_line_row(placement->statusbar_pos, placement->mainwin_pos);
    prefs_free_win_placement(placement);

    return row;
}

int
screen_inputwin_row(void)
{
    ProfWinPlacement* placement = prefs_get_win_placement();
    int row = _screen_line_row(placement->inputwin_pos, placement->mainwin_pos);
    prefs_free_win_placement(placement);

    return row;
}

int
screen_mainwin_row_start(void)
{
    ProfWinPlacement* placement = prefs_get_win_placement();
    int row = placement->mainwin_pos - 1;
    prefs_free_win_placement(placement);

    return row;
}

int
screen_mainwin_row_end(void)
{
    ProfWinPlacement* placement = prefs_get_win_placement();
    int wrows = getmaxy(stdscr);
    int row = wrows - (5 - placement->mainwin_pos);
    prefs_free_win_placement(placement);

    return row;
}
ak-if-= # print print-int32-decimal 0/screen, n print-string 0/screen, "\n" # loop } enable-keyboard-type-mode return 0 } fn simplify -> _/eax: int, _/esi: grapheme { # prime the pump var look/esi: grapheme <- get-char # do it var result/eax: int <- copy 0 result, look <- expression look return result, look } fn expression _look: grapheme -> _/eax: int, _/esi: grapheme { var look/esi: grapheme <- copy _look # read arg var result/eax: int <- copy 0 result, look <- term look $expression:loop: { # while next non-space char in ['+', '-'] look <- skip-spaces look { var continue?/eax: boolean <- add-or-sub? look compare continue?, 0/false break-if-= $expression:loop } # read operator var op/ecx: grapheme <- copy 0 op, look <- operator look # read next arg var second/edx: int <- copy 0 look <- skip-spaces look { var tmp/eax: int <- copy 0 tmp, look <- term look second <- copy tmp } # reduce $expression:perform-op: { { compare op, 0x2b/+ break-if-!= result <- add second break $expression:perform-op } { compare op, 0x2d/minus break-if-!= result <- subtract second break $expression:perform-op } } loop } look <- skip-spaces look return result, look } fn term _look: grapheme -> _/eax: int, _/esi: grapheme { var look/esi: grapheme <- copy _look # read arg look <- skip-spaces look var result/eax: int <- copy 0 result, look <- factor look $term:loop: { # while next non-space char in ['*', '/'] look <- skip-spaces look { var continue?/eax: boolean <- mul-or-div? look compare continue?, 0/false break-if-= $term:loop } # read operator var op/ecx: grapheme <- copy 0 op, look <- operator look # read next arg var second/edx: int <- copy 0 look <- skip-spaces look { var tmp/eax: int <- copy 0 tmp, look <- factor look second <- copy tmp } # reduce $term:perform-op: { { compare op, 0x2a/* break-if-!= result <- multiply second break $term:perform-op } #? { #? compare op, 0x2f/slash #? break-if-!= #? result <- divide second # not in Mu yet #? break $term:perform-op #? } } loop } return result, look } fn factor _look: grapheme -> _/eax: int, _/esi: grapheme { var look/esi: grapheme <- copy _look # should be a no-op look <- skip-spaces look # if next char is not '(', parse a number compare look, 0x28/open-paren { break-if-= var result/eax: int <- copy 0 result, look <- num look return result, look } # otherwise recurse look <- get-char # '(' var result/eax: int <- copy 0 result, look <- expression look look <- skip-spaces look look <- get-char # ')' return result, look } fn mul-or-div? c: grapheme -> _/eax: boolean { compare c, 0x2a/* { break-if-!= return 1/true } compare c, 0x2f/slash { break-if-!= return 1/true } return 0/false } fn add-or-sub? c: grapheme -> _/eax: boolean { compare c, 0x2b/+ { break-if-!= return 1/true } compare c, 0x2d/minus { break-if-!= return 1/true } return 0/false } fn operator _look: grapheme -> _/ecx: grapheme, _/esi: grapheme { var op/ecx: grapheme <- copy _look var look/esi: grapheme <- get-char return op, look } fn num _look: grapheme -> _/eax: int, _/esi: grapheme { var look/esi: grapheme <- copy _look var result/edi: int <- copy 0 { var first-digit/eax: int <- to-decimal-digit look result <- copy first-digit } { look <- get-char # done? var digit?/eax: boolean <- decimal-digit? look compare digit?, 0/false break-if-= # result *= 10 { var ten/eax: int <- copy 0xa result <- multiply ten } # result += digit(look) var digit/eax: int <- to-decimal-digit look result <- add digit loop } return result, look } fn skip-spaces _look: grapheme -> _/esi: grapheme { var look/esi: grapheme <- copy _look # should be a no-op { compare look, 0x20 break-if-!= look <- get-char loop } return look } fn get-char -> _/esi: grapheme { var look/eax: grapheme <- read-key-from-real-keyboard print-grapheme-to-real-screen look compare look, 4 { break-if-!= print-string 0/screen, "^D\n" syscall_exit } return look }