1 /* 2 * QEMU curses/ncurses display driver 3 * 4 * Copyright (c) 2005 Andrzej Zaborowski <balrog@zabor.org> 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to deal 8 * in the Software without restriction, including without limitation the rights 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 * copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22 * THE SOFTWARE. 23 */ 24 #include <curses.h> 25 26 #ifndef _WIN32 27 #include <sys/ioctl.h> 28 #include <termios.h> 29 #endif 30 31 #include "qemu-common.h" 32 #include "ui/console.h" 33 #include "sysemu/sysemu.h" 34 35 #define FONT_HEIGHT 16 36 #define FONT_WIDTH 8 37 38 static DisplayChangeListener *dcl; 39 static console_ch_t screen[160 * 100]; 40 static WINDOW *screenpad = NULL; 41 static int width, height, gwidth, gheight, invalidate; 42 static int px, py, sminx, sminy, smaxx, smaxy; 43 44 static void curses_update(DisplayChangeListener *dcl, 45 int x, int y, int w, int h) 46 { 47 chtype *line; 48 49 line = ((chtype *) screen) + y * width; 50 for (h += y; y < h; y ++, line += width) 51 mvwaddchnstr(screenpad, y, 0, line, width); 52 53 pnoutrefresh(screenpad, py, px, sminy, sminx, smaxy - 1, smaxx - 1); 54 refresh(); 55 } 56 57 static void curses_calc_pad(void) 58 { 59 if (qemu_console_is_fixedsize(NULL)) { 60 width = gwidth; 61 height = gheight; 62 } else { 63 width = COLS; 64 height = LINES; 65 } 66 67 if (screenpad) 68 delwin(screenpad); 69 70 clear(); 71 refresh(); 72 73 screenpad = newpad(height, width); 74 75 if (width > COLS) { 76 px = (width - COLS) / 2; 77 sminx = 0; 78 smaxx = COLS; 79 } else { 80 px = 0; 81 sminx = (COLS - width) / 2; 82 smaxx = sminx + width; 83 } 84 85 if (height > LINES) { 86 py = (height - LINES) / 2; 87 sminy = 0; 88 smaxy = LINES; 89 } else { 90 py = 0; 91 sminy = (LINES - height) / 2; 92 smaxy = sminy + height; 93 } 94 } 95 96 static void curses_resize(DisplayChangeListener *dcl, 97 int width, int height) 98 { 99 if (width == gwidth && height == gheight) { 100 return; 101 } 102 103 gwidth = width; 104 gheight = height; 105 106 curses_calc_pad(); 107 } 108 109 #if !defined(_WIN32) && defined(SIGWINCH) && defined(KEY_RESIZE) 110 static volatile sig_atomic_t got_sigwinch; 111 static void curses_winch_check(void) 112 { 113 struct winsize { 114 unsigned short ws_row; 115 unsigned short ws_col; 116 unsigned short ws_xpixel; /* unused */ 117 unsigned short ws_ypixel; /* unused */ 118 } ws; 119 120 if (!got_sigwinch) { 121 return; 122 } 123 got_sigwinch = false; 124 125 if (ioctl(1, TIOCGWINSZ, &ws) == -1) { 126 return; 127 } 128 129 resize_term(ws.ws_row, ws.ws_col); 130 invalidate = 1; 131 } 132 133 static void curses_winch_handler(int signum) 134 { 135 got_sigwinch = true; 136 } 137 138 static void curses_winch_init(void) 139 { 140 struct sigaction old, winch = { 141 .sa_handler = curses_winch_handler, 142 }; 143 sigaction(SIGWINCH, &winch, &old); 144 } 145 #else 146 static void curses_winch_check(void) {} 147 static void curses_winch_init(void) {} 148 #endif 149 150 static void curses_cursor_position(DisplayChangeListener *dcl, 151 int x, int y) 152 { 153 if (x >= 0) { 154 x = sminx + x - px; 155 y = sminy + y - py; 156 157 if (x >= 0 && y >= 0 && x < COLS && y < LINES) { 158 move(y, x); 159 curs_set(1); 160 /* it seems that curs_set(1) must always be called before 161 * curs_set(2) for the latter to have effect */ 162 if (!qemu_console_is_graphic(NULL)) { 163 curs_set(2); 164 } 165 return; 166 } 167 } 168 169 curs_set(0); 170 } 171 172 /* generic keyboard conversion */ 173 174 #include "curses_keys.h" 175 176 static kbd_layout_t *kbd_layout = NULL; 177 178 static void curses_refresh(DisplayChangeListener *dcl) 179 { 180 int chr, nextchr, keysym, keycode, keycode_alt; 181 182 curses_winch_check(); 183 184 if (invalidate) { 185 clear(); 186 refresh(); 187 curses_calc_pad(); 188 graphic_hw_invalidate(NULL); 189 invalidate = 0; 190 } 191 192 graphic_hw_text_update(NULL, screen); 193 194 nextchr = ERR; 195 while (1) { 196 /* while there are any pending key strokes to process */ 197 if (nextchr == ERR) 198 chr = getch(); 199 else { 200 chr = nextchr; 201 nextchr = ERR; 202 } 203 204 if (chr == ERR) 205 break; 206 207 #ifdef KEY_RESIZE 208 /* this shouldn't occur when we use a custom SIGWINCH handler */ 209 if (chr == KEY_RESIZE) { 210 clear(); 211 refresh(); 212 curses_calc_pad(); 213 curses_update(dcl, 0, 0, width, height); 214 continue; 215 } 216 #endif 217 218 keycode = curses2keycode[chr]; 219 keycode_alt = 0; 220 221 /* alt key */ 222 if (keycode == 1) { 223 nextchr = getch(); 224 225 if (nextchr != ERR) { 226 chr = nextchr; 227 keycode_alt = ALT; 228 keycode = curses2keycode[nextchr]; 229 nextchr = ERR; 230 231 if (keycode != -1) { 232 keycode |= ALT; 233 234 /* process keys reserved for qemu */ 235 if (keycode >= QEMU_KEY_CONSOLE0 && 236 keycode < QEMU_KEY_CONSOLE0 + 9) { 237 erase(); 238 wnoutrefresh(stdscr); 239 console_select(keycode - QEMU_KEY_CONSOLE0); 240 241 invalidate = 1; 242 continue; 243 } 244 } 245 } 246 } 247 248 if (kbd_layout) { 249 keysym = -1; 250 if (chr < CURSES_KEYS) 251 keysym = curses2keysym[chr]; 252 253 if (keysym == -1) { 254 if (chr < ' ') { 255 keysym = chr + '@'; 256 if (keysym >= 'A' && keysym <= 'Z') 257 keysym += 'a' - 'A'; 258 keysym |= KEYSYM_CNTRL; 259 } else 260 keysym = chr; 261 } 262 263 keycode = keysym2scancode(kbd_layout, keysym & KEYSYM_MASK); 264 if (keycode == 0) 265 continue; 266 267 keycode |= (keysym & ~KEYSYM_MASK) >> 16; 268 keycode |= keycode_alt; 269 } 270 271 if (keycode == -1) 272 continue; 273 274 if (qemu_console_is_graphic(NULL)) { 275 /* since terminals don't know about key press and release 276 * events, we need to emit both for each key received */ 277 if (keycode & SHIFT) 278 kbd_put_keycode(SHIFT_CODE); 279 if (keycode & CNTRL) 280 kbd_put_keycode(CNTRL_CODE); 281 if (keycode & ALT) 282 kbd_put_keycode(ALT_CODE); 283 if (keycode & ALTGR) { 284 kbd_put_keycode(SCANCODE_EMUL0); 285 kbd_put_keycode(ALT_CODE); 286 } 287 if (keycode & GREY) 288 kbd_put_keycode(GREY_CODE); 289 kbd_put_keycode(keycode & KEY_MASK); 290 if (keycode & GREY) 291 kbd_put_keycode(GREY_CODE); 292 kbd_put_keycode((keycode & KEY_MASK) | KEY_RELEASE); 293 if (keycode & ALTGR) { 294 kbd_put_keycode(SCANCODE_EMUL0); 295 kbd_put_keycode(ALT_CODE | KEY_RELEASE); 296 } 297 if (keycode & ALT) 298 kbd_put_keycode(ALT_CODE | KEY_RELEASE); 299 if (keycode & CNTRL) 300 kbd_put_keycode(CNTRL_CODE | KEY_RELEASE); 301 if (keycode & SHIFT) 302 kbd_put_keycode(SHIFT_CODE | KEY_RELEASE); 303 } else { 304 keysym = curses2qemu[chr]; 305 if (keysym == -1) 306 keysym = chr; 307 308 kbd_put_keysym(keysym); 309 } 310 } 311 } 312 313 static void curses_atexit(void) 314 { 315 endwin(); 316 } 317 318 static void curses_setup(void) 319 { 320 int i, colour_default[8] = { 321 COLOR_BLACK, COLOR_BLUE, COLOR_GREEN, COLOR_CYAN, 322 COLOR_RED, COLOR_MAGENTA, COLOR_YELLOW, COLOR_WHITE, 323 }; 324 325 /* input as raw as possible, let everything be interpreted 326 * by the guest system */ 327 initscr(); noecho(); intrflush(stdscr, FALSE); 328 nodelay(stdscr, TRUE); nonl(); keypad(stdscr, TRUE); 329 start_color(); raw(); scrollok(stdscr, FALSE); 330 331 for (i = 0; i < 64; i ++) 332 init_pair(i, colour_default[i & 7], colour_default[i >> 3]); 333 } 334 335 static void curses_keyboard_setup(void) 336 { 337 #if defined(__APPLE__) 338 /* always use generic keymaps */ 339 if (!keyboard_layout) 340 keyboard_layout = "en-us"; 341 #endif 342 if(keyboard_layout) { 343 kbd_layout = init_keyboard_layout(name2keysym, keyboard_layout); 344 if (!kbd_layout) 345 exit(1); 346 } 347 } 348 349 static const DisplayChangeListenerOps dcl_ops = { 350 .dpy_name = "curses", 351 .dpy_text_update = curses_update, 352 .dpy_text_resize = curses_resize, 353 .dpy_refresh = curses_refresh, 354 .dpy_text_cursor = curses_cursor_position, 355 }; 356 357 void curses_display_init(DisplayState *ds, int full_screen) 358 { 359 #ifndef _WIN32 360 if (!isatty(1)) { 361 fprintf(stderr, "We need a terminal output\n"); 362 exit(1); 363 } 364 #endif 365 366 curses_setup(); 367 curses_keyboard_setup(); 368 atexit(curses_atexit); 369 370 curses_winch_init(); 371 372 dcl = (DisplayChangeListener *) g_malloc0(sizeof(DisplayChangeListener)); 373 dcl->ops = &dcl_ops; 374 register_displaychangelistener(dcl); 375 376 invalidate = 1; 377 } 378