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/*
screen.c : All virtual screen management, real screen management is in
con_???.c files.
Copyright (C) 1999 Timo Sirainen
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 of the License, 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
*/
#include "module.h"
#include "signals.h"
#include "settings.h"
#include "screen.h"
#include "gui-readline.h"
#include "gui-windows.h"
#ifdef HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
#endif
#include <signal.h>
#ifndef COLOR_PAIRS
#define COLOR_PAIRS 64
#endif
#define MIN_SCREEN_WIDTH 20
static gint scrx, scry;
gboolean use_colors;
static gint freeze_refresh;
#ifdef SIGWINCH
static void sig_winch(int p)
{
#ifdef TIOCGWINSZ
struct winsize ws;
gint ychange, xchange;
/* Get new window size */
if (ioctl(0, TIOCGWINSZ, &ws) < 0)
return;
if (ws.ws_row == LINES && ws.ws_col == COLS)
{
/* Same size, abort. */
return;
}
if (ws.ws_col < MIN_SCREEN_WIDTH)
ws.ws_col = MIN_SCREEN_WIDTH;
/* Resize curses terminal */
ychange = ws.ws_row-LINES;
xchange = ws.ws_col-COLS;
#ifdef HAVE_CURSES_RESIZETERM
resizeterm(ws.ws_row, ws.ws_col);
#else
deinit_screen();
init_screen();
#endif
last_text_line += ychange;
gui_windows_resize(ychange, xchange != 0);
#endif
}
#endif
/* SIGINT != ^C .. any better way to make this work? */
void sigint_handler(int p)
{
ungetch(3);
readline();
}
static void read_settings(void)
{
use_colors = settings_get_bool("colors");
irssi_redraw();
}
/* Initialize screen, detect screen length */
gint init_screen(void)
{
gchar ansi_tab[8] = { 0, 4, 2, 6, 1, 5, 3, 7 };
gint num;
if (!initscr()) return 0;
if (COLS < MIN_SCREEN_WIDTH)
COLS = MIN_SCREEN_WIDTH;
signal(SIGINT, sigint_handler);
cbreak(); noecho(); idlok(stdscr, 1);
#ifdef HAVE_CURSES_IDCOK
idcok(stdscr, 1);
#endif
intrflush(stdscr, FALSE); halfdelay(1); keypad(stdscr, 1);
settings_add_bool("lookandfeel", "colors", TRUE);
use_colors = settings_get_bool("colors") && has_colors();
if (has_colors()) start_color();
#ifdef HAVE_NCURSES_USE_DEFAULT_COLORS
/* this lets us to use the "default" background color for colors <= 7 so
background pixmaps etc. show up right */
use_default_colors();
for (num = 1; num < COLOR_PAIRS; num++)
init_pair(num, ansi_tab[num & 7], num <= 7 ? -1 : ansi_tab[num >> 3]);
init_pair(63, 0, -1); /* hm.. not THAT good idea, but probably more people
want dark grey than white on white.. */
#else
for (num = 1; num < COLOR_PAIRS; num++)
init_pair(num, ansi_tab[num & 7], ansi_tab[num >> 3]);
init_pair(63, 0, 0);
#endif
scrx = scry = 0;
if (last_text_line == 0)
{
first_text_line = 0;
last_text_line = LINES-1;
}
#ifdef SIGWINCH
signal(SIGWINCH, sig_winch);
#endif
freeze_refresh = 0;
clear();
signal_add("setup changed", (SIGNAL_FUNC) read_settings);
return 1;
}
/* Deinitialize screen */
void deinit_screen(void)
{
signal_remove("setup changed", (SIGNAL_FUNC) read_settings);
endwin();
}
void set_color(gint col)
{
gint attr;
if (!use_colors)
{
if ((col & 0x70) != 0)
attr = A_REVERSE;
else
attr = 0;
}
else
{
if (col & ATTR_COLOR8)
attr = A_DIM | COLOR_PAIR(63);
else
attr = COLOR_PAIR((col&7) + (col&0x70)/2);
}
if (col & 0x08) attr |= A_BOLD;
if (col & 0x80) attr |= A_BLINK;
if (col & ATTR_UNDERLINE) attr |= A_UNDERLINE;
if (col & ATTR_REVERSE) attr |= A_REVERSE;
attrset(attr);
}
void set_bg(gint col)
{
gint attr;
if (!use_colors)
{
if ((col & 0x70) != 0)
attr = A_REVERSE;
else
attr = 0;
}
else
{
if (col == 8)
attr = A_DIM | COLOR_PAIR(63);
else
attr = COLOR_PAIR((col&7) + (col&0x70)/2);
}
if (col & 0x08) attr |= A_BOLD;
if (col & 0x80) attr |= A_BLINK;
bkgdset(' ' | attr);
}
/* Scroll area up */
void scroll_up(gint y1, gint y2)
{
scrollok(stdscr, TRUE);
setscrreg(y1, y2); scrl(1);
scrollok(stdscr, FALSE);
}
/* Scroll area down */
void scroll_down(gint y1, gint y2)
{
scrollok(stdscr, TRUE);
setscrreg(y1, y2); scrl(-1);
scrollok(stdscr, FALSE);
}
void move_cursor(gint y, gint x)
{
scry = y;
scrx = x;
}
void screen_refresh_freeze(void)
{
freeze_refresh++;
}
void screen_refresh_thaw(void)
{
if (freeze_refresh > 0)
{
freeze_refresh--;
if (freeze_refresh == 0) screen_refresh();
}
}
void screen_refresh(void)
{
if (freeze_refresh == 0)
{
move(scry, scrx);
refresh();
}
}
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