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qemu-patch-raspberry4/ui/curses.c
Samuel Thibault 459a707ecc curses: support wide input 
This makes use of wide curses functions instead of 8bit functions. This
allows to type e.g. accented letters.

Unfortunately, key codes are then returned with values that could be
confused with wide characters by ncurses, so we need to add a maybe_keycode
variable to know whether the returned value is a key code or a character
(curses with wide support), or possibly both (curses without wide support).

The translation tables thus also need to be separated into key code
translation and character translation.  The curses2foo helper makes it easier
to use them.

Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Message-id: 20190304210532.7840-1-samuel.thibault@ens-lyon.org
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2019-03-11 08:39:02 +01:00

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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 "qemu/osdep.h"
#ifndef _WIN32
#include <sys/ioctl.h>
#include <termios.h>
#endif
#include "qapi/error.h"
#include "qemu-common.h"
#include "ui/console.h"
#include "ui/input.h"
#include "sysemu/sysemu.h"
/* KEY_EVENT is defined in wincon.h and in curses.h. Avoid redefinition. */
#undef KEY_EVENT
#include <curses.h>
#undef KEY_EVENT
#define FONT_HEIGHT 16
#define FONT_WIDTH 8
enum maybe_keycode {
CURSES_KEYCODE,
CURSES_CHAR,
CURSES_CHAR_OR_KEYCODE,
};
static DisplayChangeListener *dcl;
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 chtype vga_to_curses[256];
static void curses_update(DisplayChangeListener *dcl,
int x, int y, int w, int h)
{
console_ch_t *line;
chtype curses_line[width];
line = screen + y * width;
for (h += y; y < h; y ++, line += width) {
for (x = 0; x < width; x++) {
chtype ch = line[x] & 0xff;
chtype at = line[x] & ~0xff;
if (vga_to_curses[ch]) {
ch = vga_to_curses[ch];
}
curses_line[x] = ch | at;
}
mvwaddchnstr(screenpad, y, 0, curses_line, width);
}
pnoutrefresh(screenpad, py, px, sminy, sminx, smaxy - 1, smaxx - 1);
refresh();
}
static void curses_calc_pad(void)
{
if (qemu_console_is_fixedsize(NULL)) {
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(DisplayChangeListener *dcl,
int width, int height)
{
if (width == gwidth && height == gheight) {
return;
}
gwidth = width;
gheight = height;
curses_calc_pad();
}
#if !defined(_WIN32) && defined(SIGWINCH) && defined(KEY_RESIZE)
static volatile sig_atomic_t got_sigwinch;
static void curses_winch_check(void)
{
struct winsize {
unsigned short ws_row;
unsigned short ws_col;
unsigned short ws_xpixel; /* unused */
unsigned short ws_ypixel; /* unused */
} ws;
if (!got_sigwinch) {
return;
}
got_sigwinch = false;
if (ioctl(1, TIOCGWINSZ, &ws) == -1) {
return;
}
resize_term(ws.ws_row, ws.ws_col);
invalidate = 1;
}
static void curses_winch_handler(int signum)
{
got_sigwinch = true;
}
static void curses_winch_init(void)
{
struct sigaction old, winch = {
.sa_handler = curses_winch_handler,
};
sigaction(SIGWINCH, &winch, &old);
}
#else
static void curses_winch_check(void) {}
static void curses_winch_init(void) {}
#endif
static void curses_cursor_position(DisplayChangeListener *dcl,
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 (!qemu_console_is_graphic(NULL)) {
curs_set(2);
}
return;
}
}
curs_set(0);
}
/* generic keyboard conversion */
#include "curses_keys.h"
static kbd_layout_t *kbd_layout = NULL;
static wint_t console_getch(enum maybe_keycode *maybe_keycode)
{
wint_t ret;
switch (get_wch(&ret)) {
case KEY_CODE_YES:
*maybe_keycode = CURSES_KEYCODE;
break;
case OK:
*maybe_keycode = CURSES_CHAR;
break;
case ERR:
ret = -1;
break;
}
return ret;
}
static int curses2foo(const int _curses2foo[], const int _curseskey2foo[],
int chr, enum maybe_keycode maybe_keycode)
{
int ret = -1;
if (maybe_keycode == CURSES_CHAR) {
if (chr < CURSES_CHARS) {
ret = _curses2foo[chr];
}
} else {
if (chr < CURSES_KEYS) {
ret = _curseskey2foo[chr];
}
if (ret == -1 && maybe_keycode == CURSES_CHAR_OR_KEYCODE &&
chr < CURSES_CHARS) {
ret = _curses2foo[chr];
}
}
return ret;
}
#define curses2keycode(chr, maybe_keycode) \
curses2foo(_curses2keycode, _curseskey2keycode, chr, maybe_keycode)
#define curses2keysym(chr, maybe_keycode) \
curses2foo(_curses2keysym, _curseskey2keysym, chr, maybe_keycode)
#define curses2qemu(chr, maybe_keycode) \
curses2foo(_curses2qemu, _curseskey2qemu, chr, maybe_keycode)
static void curses_refresh(DisplayChangeListener *dcl)
{
int chr, keysym, keycode, keycode_alt;
enum maybe_keycode maybe_keycode;
curses_winch_check();
if (invalidate) {
clear();
refresh();
curses_calc_pad();
graphic_hw_invalidate(NULL);
invalidate = 0;
}
graphic_hw_text_update(NULL, screen);
while (1) {
/* while there are any pending key strokes to process */
chr = console_getch(&maybe_keycode);
if (chr == -1)
break;
#ifdef KEY_RESIZE
/* this shouldn't occur when we use a custom SIGWINCH handler */
if (maybe_keycode != CURSES_CHAR && chr == KEY_RESIZE) {
clear();
refresh();
curses_calc_pad();
curses_update(dcl, 0, 0, width, height);
continue;
}
#endif
keycode = curses2keycode(chr, maybe_keycode);
keycode_alt = 0;
/* alt or esc key */
if (keycode == 1) {
enum maybe_keycode next_maybe_keycode;
int nextchr = console_getch(&next_maybe_keycode);
if (nextchr != -1) {
chr = nextchr;
maybe_keycode = next_maybe_keycode;
keycode_alt = ALT;
keycode = curses2keycode(chr, maybe_keycode);
if (keycode != -1) {
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) {
keysym = curses2keysym(chr, maybe_keycode);
if (keysym == -1) {
if (chr < ' ') {
keysym = chr + '@';
if (keysym >= 'A' && keysym <= 'Z')
keysym += 'a' - 'A';
keysym |= KEYSYM_CNTRL;
} else
keysym = chr;
}
keycode = keysym2scancode(kbd_layout, keysym & KEYSYM_MASK,
NULL, false);
if (keycode == 0)
continue;
keycode |= (keysym & ~KEYSYM_MASK) >> 16;
keycode |= keycode_alt;
}
if (keycode == -1)
continue;
if (qemu_console_is_graphic(NULL)) {
/* since terminals don't know about key press and release
* events, we need to emit both for each key received */
if (keycode & SHIFT) {
qemu_input_event_send_key_number(NULL, SHIFT_CODE, true);
qemu_input_event_send_key_delay(0);
}
if (keycode & CNTRL) {
qemu_input_event_send_key_number(NULL, CNTRL_CODE, true);
qemu_input_event_send_key_delay(0);
}
if (keycode & ALT) {
qemu_input_event_send_key_number(NULL, ALT_CODE, true);
qemu_input_event_send_key_delay(0);
}
if (keycode & ALTGR) {
qemu_input_event_send_key_number(NULL, GREY | ALT_CODE, true);
qemu_input_event_send_key_delay(0);
}
qemu_input_event_send_key_number(NULL, keycode & KEY_MASK, true);
qemu_input_event_send_key_delay(0);
qemu_input_event_send_key_number(NULL, keycode & KEY_MASK, false);
qemu_input_event_send_key_delay(0);
if (keycode & ALTGR) {
qemu_input_event_send_key_number(NULL, GREY | ALT_CODE, false);
qemu_input_event_send_key_delay(0);
}
if (keycode & ALT) {
qemu_input_event_send_key_number(NULL, ALT_CODE, false);
qemu_input_event_send_key_delay(0);
}
if (keycode & CNTRL) {
qemu_input_event_send_key_number(NULL, CNTRL_CODE, false);
qemu_input_event_send_key_delay(0);
}
if (keycode & SHIFT) {
qemu_input_event_send_key_number(NULL, SHIFT_CODE, false);
qemu_input_event_send_key_delay(0);
}
} else {
keysym = curses2qemu(chr, maybe_keycode);
if (keysym == -1)
keysym = chr;
kbd_put_keysym(keysym);
}
}
}
static void curses_atexit(void)
{
endwin();
}
static void curses_setup(void)
{
int i, colour_default[8] = {
[QEMU_COLOR_BLACK] = COLOR_BLACK,
[QEMU_COLOR_BLUE] = COLOR_BLUE,
[QEMU_COLOR_GREEN] = COLOR_GREEN,
[QEMU_COLOR_CYAN] = COLOR_CYAN,
[QEMU_COLOR_RED] = COLOR_RED,
[QEMU_COLOR_MAGENTA] = COLOR_MAGENTA,
[QEMU_COLOR_YELLOW] = COLOR_YELLOW,
[QEMU_COLOR_WHITE] = 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);
set_escdelay(25);
/* Make color pair to match color format (3bits bg:3bits fg) */
for (i = 0; i < 64; i++) {
init_pair(i, colour_default[i & 7], colour_default[i >> 3]);
}
/* Set default color for more than 64 for safety. */
for (i = 64; i < COLOR_PAIRS; i++) {
init_pair(i, COLOR_WHITE, COLOR_BLACK);
}
/*
* Setup mapping for vga to curses line graphics.
* FIXME: for better font, have to use ncursesw and setlocale()
*/
#if 0
/* FIXME: map from where? */
ACS_S1;
ACS_S3;
ACS_S7;
ACS_S9;
#endif
/* ACS_* is not constant. So, we can't initialize statically. */
vga_to_curses['\0'] = ' ';
vga_to_curses[0x04] = ACS_DIAMOND;
vga_to_curses[0x18] = ACS_UARROW;
vga_to_curses[0x19] = ACS_DARROW;
vga_to_curses[0x1a] = ACS_RARROW;
vga_to_curses[0x1b] = ACS_LARROW;
vga_to_curses[0x9c] = ACS_STERLING;
vga_to_curses[0xb0] = ACS_BOARD;
vga_to_curses[0xb1] = ACS_CKBOARD;
vga_to_curses[0xb3] = ACS_VLINE;
vga_to_curses[0xb4] = ACS_RTEE;
vga_to_curses[0xbf] = ACS_URCORNER;
vga_to_curses[0xc0] = ACS_LLCORNER;
vga_to_curses[0xc1] = ACS_BTEE;
vga_to_curses[0xc2] = ACS_TTEE;
vga_to_curses[0xc3] = ACS_LTEE;
vga_to_curses[0xc4] = ACS_HLINE;
vga_to_curses[0xc5] = ACS_PLUS;
vga_to_curses[0xce] = ACS_LANTERN;
vga_to_curses[0xd8] = ACS_NEQUAL;
vga_to_curses[0xd9] = ACS_LRCORNER;
vga_to_curses[0xda] = ACS_ULCORNER;
vga_to_curses[0xdb] = ACS_BLOCK;
vga_to_curses[0xe3] = ACS_PI;
vga_to_curses[0xf1] = ACS_PLMINUS;
vga_to_curses[0xf2] = ACS_GEQUAL;
vga_to_curses[0xf3] = ACS_LEQUAL;
vga_to_curses[0xf8] = ACS_DEGREE;
vga_to_curses[0xfe] = ACS_BULLET;
}
static void curses_keyboard_setup(void)
{
#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,
&error_fatal);
}
}
static const DisplayChangeListenerOps dcl_ops = {
.dpy_name = "curses",
.dpy_text_update = curses_update,
.dpy_text_resize = curses_resize,
.dpy_refresh = curses_refresh,
.dpy_text_cursor = curses_cursor_position,
};
static void curses_display_init(DisplayState *ds, DisplayOptions *opts)
{
#ifndef _WIN32
if (!isatty(1)) {
fprintf(stderr, "We need a terminal output\n");
exit(1);
}
#endif
curses_setup();
curses_keyboard_setup();
atexit(curses_atexit);
curses_winch_init();
dcl = g_new0(DisplayChangeListener, 1);
dcl->ops = &dcl_ops;
register_displaychangelistener(dcl);
invalidate = 1;
}
static QemuDisplay qemu_display_curses = {
.type = DISPLAY_TYPE_CURSES,
.init = curses_display_init,
};
static void register_curses(void)
{
qemu_display_register(&qemu_display_curses);
}
type_init(register_curses);
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