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xemu/ui/curses.c
Gerd Hoffmann 19c1b9fd3d keymap: fix keyup mappings 
It is possible that the modifier state on keyup is different from the
modifier state on keydown.  In that case the keycode lookup can end up
with different keys in case multiple keysym -> keycode mappings exist,
because it picks the mapping depending on modifier state.

To fix that change the lookup logic for keyup events.  Instead of
looking at the modifier state check the key state and prefer a keycodes
where the key is in "down" state right now.

Fixes: abb4f2c965 keymap: consider modifier state when picking a mapping
Buglink: https://bugs.launchpad.net/bugs/1738283
Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=1658676
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-id: 20190122092814.14919-9-kraxel@redhat.com
2019-02-05 10:45:44 +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
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 void curses_refresh(DisplayChangeListener *dcl)
{
int chr, keysym, keycode, keycode_alt;
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 = getch();
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(dcl, 0, 0, width, height);
continue;
}
#endif
keycode = curses2keycode[chr];
keycode_alt = 0;
/* alt key */
if (keycode == 1) {
int nextchr = getch();
if (nextchr != ERR) {
chr = nextchr;
keycode_alt = ALT;
keycode = curses2keycode[chr];
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 = -1;
if (chr < CURSES_KEYS)
keysym = curses2keysym[chr];
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 = -1;
if (chr < CURSES_KEYS) {
keysym = curses2qemu[chr];
}
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);
/* 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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