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qemu/curses.c

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/*
* QEMU curses/ncurses display driver
*
* Copyright (c) 2005 Andrzej Zaborowski <balrog@zabor.org>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <curses.h>
#ifndef _WIN32
#include <signal.h>
#include <sys/ioctl.h>
#include <termios.h>
#endif
#ifdef __OpenBSD__
#define resize_term resizeterm
#endif
#include "qemu-common.h"
#include "console.h"
#include "sysemu.h"
#define FONT_HEIGHT 16
#define FONT_WIDTH 8
static console_ch_t screen[160 * 100];
static WINDOW *screenpad = NULL;
static int width, height, gwidth, gheight, invalidate;
static int px, py, sminx, sminy, smaxx, smaxy;
static void curses_update(DisplayState *ds, int x, int y, int w, int h)
{
chtype *line;
line = ((chtype *) screen) + y * width;
for (h += y; y < h; y ++, line += width)
mvwaddchnstr(screenpad, y, 0, line, width);
pnoutrefresh(screenpad, py, px, sminy, sminx, smaxy - 1, smaxx - 1);
refresh();
}
static void curses_calc_pad(void)
{
if (is_fixedsize_console()) {
width = gwidth;
height = gheight;
} else {
width = COLS;
height = LINES;
}
if (screenpad)
delwin(screenpad);
clear();
refresh();
screenpad = newpad(height, width);
if (width > COLS) {
px = (width - COLS) / 2;
sminx = 0;
smaxx = COLS;
} else {
px = 0;
sminx = (COLS - width) / 2;
smaxx = sminx + width;
}
if (height > LINES) {
py = (height - LINES) / 2;
sminy = 0;
smaxy = LINES;
} else {
py = 0;
sminy = (LINES - height) / 2;
smaxy = sminy + height;
}
}
static void curses_resize(DisplayState *ds)
{
if (ds_get_width(ds) == gwidth && ds_get_height(ds) == gheight)
return;
gwidth = ds_get_width(ds);
gheight = ds_get_height(ds);
curses_calc_pad();
ds->surface->width = width * FONT_WIDTH;
ds->surface->height = height * FONT_HEIGHT;
}
#ifndef _WIN32
#if defined(SIGWINCH) && defined(KEY_RESIZE)
static void curses_winch_handler(int signum)
{
struct winsize {
unsigned short ws_row;
unsigned short ws_col;
unsigned short ws_xpixel; /* unused */
unsigned short ws_ypixel; /* unused */
} ws;
/* terminal size changed */
if (ioctl(1, TIOCGWINSZ, &ws) == -1)
return;
resize_term(ws.ws_row, ws.ws_col);
curses_calc_pad();
invalidate = 1;
/* some systems require this */
signal(SIGWINCH, curses_winch_handler);
}
#endif
#endif
static void curses_cursor_position(DisplayState *ds, int x, int y)
{
if (x >= 0) {
x = sminx + x - px;
y = sminy + y - py;
if (x >= 0 && y >= 0 && x < COLS && y < LINES) {
move(y, x);
curs_set(1);
/* it seems that curs_set(1) must always be called before
* curs_set(2) for the latter to have effect */
if (!is_graphic_console())
curs_set(2);
return;
}
}
curs_set(0);
}
/* generic keyboard conversion */
#include "curses_keys.h"
static kbd_layout_t *kbd_layout = NULL;
static int keycode2keysym[CURSES_KEYS];
static void curses_refresh(DisplayState *ds)
{
int chr, nextchr, keysym, keycode;
if (invalidate) {
clear();
refresh();
curses_calc_pad();
ds->surface->width = FONT_WIDTH * width;
ds->surface->height = FONT_HEIGHT * height;
vga_hw_invalidate();
invalidate = 0;
}
vga_hw_text_update(screen);
nextchr = ERR;
while (1) {
/* while there are any pending key strokes to process */
if (nextchr == ERR)
chr = getch();
else {
chr = nextchr;
nextchr = ERR;
}
if (chr == ERR)
break;
#ifdef KEY_RESIZE
/* this shouldn't occur when we use a custom SIGWINCH handler */
if (chr == KEY_RESIZE) {
clear();
refresh();
curses_calc_pad();
curses_update(ds, 0, 0, width, height);
ds->surface->width = FONT_WIDTH * width;
ds->surface->height = FONT_HEIGHT * height;
continue;
}
#endif
keycode = curses2keycode[chr];
if (keycode == -1)
continue;
/* alt key */
if (keycode == 1) {
nextchr = getch();
if (nextchr != ERR) {
keycode = curses2keycode[nextchr];
nextchr = ERR;
if (keycode == -1)
continue;
keycode |= ALT;
/* process keys reserved for qemu */
if (keycode >= QEMU_KEY_CONSOLE0 &&
keycode < QEMU_KEY_CONSOLE0 + 9) {
erase();
wnoutrefresh(stdscr);
console_select(keycode - QEMU_KEY_CONSOLE0);
invalidate = 1;
continue;
}
}
}
if (kbd_layout && !(keycode & GREY)) {
keysym = keycode2keysym[keycode & KEY_MASK];
if (keysym == -1)
keysym = chr;
keycode &= ~KEY_MASK;
keycode |= keysym2scancode(kbd_layout, keysym);
}
if (is_graphic_console()) {
/* since terminals don't know about key press and release
* events, we need to emit both for each key received */
if (keycode & SHIFT)
kbd_put_keycode(SHIFT_CODE);
if (keycode & CNTRL)
kbd_put_keycode(CNTRL_CODE);
if (keycode & ALT)
kbd_put_keycode(ALT_CODE);
if (keycode & GREY)
kbd_put_keycode(GREY_CODE);
kbd_put_keycode(keycode & KEY_MASK);
if (keycode & GREY)
kbd_put_keycode(GREY_CODE);
kbd_put_keycode((keycode & KEY_MASK) | KEY_RELEASE);
if (keycode & ALT)
kbd_put_keycode(ALT_CODE | KEY_RELEASE);
if (keycode & CNTRL)
kbd_put_keycode(CNTRL_CODE | KEY_RELEASE);
if (keycode & SHIFT)
kbd_put_keycode(SHIFT_CODE | KEY_RELEASE);
} else {
keysym = curses2keysym[chr];
if (keysym == -1)
keysym = chr;
kbd_put_keysym(keysym);
}
}
}
static void curses_cleanup(void *opaque)
{
endwin();
}
static void curses_atexit(void)
{
curses_cleanup(NULL);
}
static void curses_setup(void)
{
int i, colour_default[8] = {
COLOR_BLACK, COLOR_BLUE, COLOR_GREEN, COLOR_CYAN,
COLOR_RED, COLOR_MAGENTA, COLOR_YELLOW, COLOR_WHITE,
};
/* input as raw as possible, let everything be interpreted
* by the guest system */
initscr(); noecho(); intrflush(stdscr, FALSE);
nodelay(stdscr, TRUE); nonl(); keypad(stdscr, TRUE);
start_color(); raw(); scrollok(stdscr, FALSE);
for (i = 0; i < 64; i ++)
init_pair(i, colour_default[i & 7], colour_default[i >> 3]);
}
static void curses_keyboard_setup(void)
{
int i, keycode, keysym;
#if defined(__APPLE__)
/* always use generic keymaps */
if (!keyboard_layout)
keyboard_layout = "en-us";
#endif
if(keyboard_layout) {
kbd_layout = init_keyboard_layout(name2keysym, keyboard_layout);
if (!kbd_layout)
exit(1);
}
for (i = 0; i < CURSES_KEYS; i ++)
keycode2keysym[i] = -1;
for (i = 0; i < CURSES_KEYS; i ++) {
if (curses2keycode[i] == -1)
continue;
keycode = curses2keycode[i] & KEY_MASK;
if (keycode2keysym[keycode] >= 0)
continue;
for (keysym = 0; keysym < CURSES_KEYS; keysym ++)
if (curses2keycode[keysym] == keycode) {
keycode2keysym[keycode] = keysym;
break;
}
if (keysym >= CURSES_KEYS)
keycode2keysym[keycode] = i;
}
}
void curses_display_init(DisplayState *ds, int full_screen)
{
DisplayChangeListener *dcl;
#ifndef _WIN32
if (!isatty(1)) {
fprintf(stderr, "We need a terminal output\n");
exit(1);
}
#endif
curses_setup();
curses_keyboard_setup();
atexit(curses_atexit);
#ifndef _WIN32
#if defined(SIGWINCH) && defined(KEY_RESIZE)
/* some curses implementations provide a handler, but we
* want to be sure this is handled regardless of the library */
signal(SIGWINCH, curses_winch_handler);
#endif
#endif
dcl = (DisplayChangeListener *) qemu_mallocz(sizeof(DisplayChangeListener));
dcl->dpy_update = curses_update;
dcl->dpy_resize = curses_resize;
dcl->dpy_refresh = curses_refresh;
dcl->dpy_text_cursor = curses_cursor_position;
register_displaychangelistener(ds, dcl);
qemu_free_displaysurface(ds);
ds->surface = qemu_create_displaysurface_from(640, 400, 0, 0, (uint8_t*) screen);
invalidate = 1;
}
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