ui/curses.c

   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 "qemu/osdep.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 "ui/input.h"
  34 #include "sysemu/sysemu.h"
  35
  36 /* KEY_EVENT is defined in wincon.h and in curses.h. Avoid redefinition. */
  37 #undef KEY_EVENT
  38 #include <curses.h>
  39 #undef KEY_EVENT
  40
  41 #define FONT_HEIGHT 16
  42 #define FONT_WIDTH 8
  43
  44 static DisplayChangeListener *dcl;
  45 static console_ch_t screen[160 * 100];
  46 static WINDOW *screenpad = NULL;
  47 static int width, height, gwidth, gheight, invalidate;
  48 static int px, py, sminx, sminy, smaxx, smaxy;
  49
  50 static chtype vga_to_curses[256];
  51
  52 static void curses_update(DisplayChangeListener *dcl,
  53                           int x, int y, int w, int h)
  54 {
  55     console_ch_t *line;
  56     chtype curses_line[width];
  57
  58     line = screen + y * width;
  59     for (h += y; y < h; y ++, line += width) {
  60         for (x = 0; x < width; x++) {
  61             chtype ch = line[x] & 0xff;
  62             chtype at = line[x] & ~0xff;
  63             if (vga_to_curses[ch]) {
  64                 ch = vga_to_curses[ch];
  65             }
  66             curses_line[x] = ch | at;
  67         }
  68         mvwaddchnstr(screenpad, y, 0, curses_line, width);
  69     }
  70
  71     pnoutrefresh(screenpad, py, px, sminy, sminx, smaxy - 1, smaxx - 1);
  72     refresh();
  73 }
  74
  75 static void curses_calc_pad(void)
  76 {
  77     if (qemu_console_is_fixedsize(NULL)) {
  78         width = gwidth;
  79         height = gheight;
  80     } else {
  81         width = COLS;
  82         height = LINES;
  83     }
  84
  85     if (screenpad)
  86         delwin(screenpad);
  87
  88     clear();
  89     refresh();
  90
  91     screenpad = newpad(height, width);
  92
  93     if (width > COLS) {
  94         px = (width - COLS) / 2;
  95         sminx = 0;
  96         smaxx = COLS;
  97     } else {
  98         px = 0;
  99         sminx = (COLS - width) / 2;
 100         smaxx = sminx + width;
 101     }
 102
 103     if (height > LINES) {
 104         py = (height - LINES) / 2;
 105         sminy = 0;
 106         smaxy = LINES;
 107     } else {
 108         py = 0;
 109         sminy = (LINES - height) / 2;
 110         smaxy = sminy + height;
 111     }
 112 }
 113
 114 static void curses_resize(DisplayChangeListener *dcl,
 115                           int width, int height)
 116 {
 117     if (width == gwidth && height == gheight) {
 118         return;
 119     }
 120
 121     gwidth = width;
 122     gheight = height;
 123
 124     curses_calc_pad();
 125 }
 126
 127 #if !defined(_WIN32) && defined(SIGWINCH) && defined(KEY_RESIZE)
 128 static volatile sig_atomic_t got_sigwinch;
 129 static void curses_winch_check(void)
 130 {
 131     struct winsize {
 132         unsigned short ws_row;
 133         unsigned short ws_col;
 134         unsigned short ws_xpixel;   /* unused */
 135         unsigned short ws_ypixel;   /* unused */
 136     } ws;
 137
 138     if (!got_sigwinch) {
 139         return;
 140     }
 141     got_sigwinch = false;
 142
 143     if (ioctl(1, TIOCGWINSZ, &ws) == -1) {
 144         return;
 145     }
 146
 147     resize_term(ws.ws_row, ws.ws_col);
 148     invalidate = 1;
 149 }
 150
 151 static void curses_winch_handler(int signum)
 152 {
 153     got_sigwinch = true;
 154 }
 155
 156 static void curses_winch_init(void)
 157 {
 158     struct sigaction old, winch = {
 159         .sa_handler  = curses_winch_handler,
 160     };
 161     sigaction(SIGWINCH, &winch, &old);
 162 }
 163 #else
 164 static void curses_winch_check(void) {}
 165 static void curses_winch_init(void) {}
 166 #endif
 167
 168 static void curses_cursor_position(DisplayChangeListener *dcl,
 169                                    int x, int y)
 170 {
 171     if (x >= 0) {
 172         x = sminx + x - px;
 173         y = sminy + y - py;
 174
 175         if (x >= 0 && y >= 0 && x < COLS && y < LINES) {
 176             move(y, x);
 177             curs_set(1);
 178             /* it seems that curs_set(1) must always be called before
 179              * curs_set(2) for the latter to have effect */
 180             if (!qemu_console_is_graphic(NULL)) {
 181                 curs_set(2);
 182             }
 183             return;
 184         }
 185     }
 186
 187     curs_set(0);
 188 }
 189
 190 /* generic keyboard conversion */
 191
 192 #include "curses_keys.h"
 193
 194 static kbd_layout_t *kbd_layout = NULL;
 195
 196 static void curses_refresh(DisplayChangeListener *dcl)
 197 {
 198     int chr, keysym, keycode, keycode_alt;
 199
 200     curses_winch_check();
 201
 202     if (invalidate) {
 203         clear();
 204         refresh();
 205         curses_calc_pad();
 206         graphic_hw_invalidate(NULL);
 207         invalidate = 0;
 208     }
 209
 210     graphic_hw_text_update(NULL, screen);
 211
 212     while (1) {
 213         /* while there are any pending key strokes to process */
 214         chr = getch();
 215
 216         if (chr == ERR)
 217             break;
 218
 219 #ifdef KEY_RESIZE
 220         /* this shouldn't occur when we use a custom SIGWINCH handler */
 221         if (chr == KEY_RESIZE) {
 222             clear();
 223             refresh();
 224             curses_calc_pad();
 225             curses_update(dcl, 0, 0, width, height);
 226             continue;
 227         }
 228 #endif
 229
 230         keycode = curses2keycode[chr];
 231         keycode_alt = 0;
 232
 233         /* alt key */
 234         if (keycode == 1) {
 235             int nextchr = getch();
 236
 237             if (nextchr != ERR) {
 238                 chr = nextchr;
 239                 keycode_alt = ALT;
 240                 keycode = curses2keycode[chr];
 241
 242                 if (keycode != -1) {
 243                     keycode |= ALT;
 244
 245                     /* process keys reserved for qemu */
 246                     if (keycode >= QEMU_KEY_CONSOLE0 &&
 247                             keycode < QEMU_KEY_CONSOLE0 + 9) {
 248                         erase();
 249                         wnoutrefresh(stdscr);
 250                         console_select(keycode - QEMU_KEY_CONSOLE0);
 251
 252                         invalidate = 1;
 253                         continue;
 254                     }
 255                 }
 256             }
 257         }
 258
 259         if (kbd_layout) {
 260             keysym = -1;
 261             if (chr < CURSES_KEYS)
 262                 keysym = curses2keysym[chr];
 263
 264             if (keysym == -1) {
 265                 if (chr < ' ') {
 266                     keysym = chr + '@';
 267                     if (keysym >= 'A' && keysym <= 'Z')
 268                         keysym += 'a' - 'A';
 269                     keysym |= KEYSYM_CNTRL;
 270                 } else
 271                     keysym = chr;
 272             }
 273
 274             keycode = keysym2scancode(kbd_layout, keysym & KEYSYM_MASK,
 275                                       false, false, false);
 276             if (keycode == 0)
 277                 continue;
 278
 279             keycode |= (keysym & ~KEYSYM_MASK) >> 16;
 280             keycode |= keycode_alt;
 281         }
 282
 283         if (keycode == -1)
 284             continue;
 285
 286         if (qemu_console_is_graphic(NULL)) {
 287             /* since terminals don't know about key press and release
 288              * events, we need to emit both for each key received */
 289             if (keycode & SHIFT) {
 290                 qemu_input_event_send_key_number(NULL, SHIFT_CODE, true);
 291                 qemu_input_event_send_key_delay(0);
 292             }
 293             if (keycode & CNTRL) {
 294                 qemu_input_event_send_key_number(NULL, CNTRL_CODE, true);
 295                 qemu_input_event_send_key_delay(0);
 296             }
 297             if (keycode & ALT) {
 298                 qemu_input_event_send_key_number(NULL, ALT_CODE, true);
 299                 qemu_input_event_send_key_delay(0);
 300             }
 301             if (keycode & ALTGR) {
 302                 qemu_input_event_send_key_number(NULL, GREY | ALT_CODE, true);
 303                 qemu_input_event_send_key_delay(0);
 304             }
 305
 306             qemu_input_event_send_key_number(NULL, keycode & KEY_MASK, true);
 307             qemu_input_event_send_key_delay(0);
 308             qemu_input_event_send_key_number(NULL, keycode & KEY_MASK, false);
 309             qemu_input_event_send_key_delay(0);
 310
 311             if (keycode & ALTGR) {
 312                 qemu_input_event_send_key_number(NULL, GREY | ALT_CODE, false);
 313                 qemu_input_event_send_key_delay(0);
 314             }
 315             if (keycode & ALT) {
 316                 qemu_input_event_send_key_number(NULL, ALT_CODE, false);
 317                 qemu_input_event_send_key_delay(0);
 318             }
 319             if (keycode & CNTRL) {
 320                 qemu_input_event_send_key_number(NULL, CNTRL_CODE, false);
 321                 qemu_input_event_send_key_delay(0);
 322             }
 323             if (keycode & SHIFT) {
 324                 qemu_input_event_send_key_number(NULL, SHIFT_CODE, false);
 325                 qemu_input_event_send_key_delay(0);
 326             }
 327         } else {
 328             keysym = -1;
 329             if (chr < CURSES_KEYS) {
 330                 keysym = curses2qemu[chr];
 331             }
 332             if (keysym == -1)
 333                 keysym = chr;
 334
 335             kbd_put_keysym(keysym);
 336         }
 337     }
 338 }
 339
 340 static void curses_atexit(void)
 341 {
 342     endwin();
 343 }
 344
 345 static void curses_setup(void)
 346 {
 347     int i, colour_default[8] = {
 348         [QEMU_COLOR_BLACK]   = COLOR_BLACK,
 349         [QEMU_COLOR_BLUE]    = COLOR_BLUE,
 350         [QEMU_COLOR_GREEN]   = COLOR_GREEN,
 351         [QEMU_COLOR_CYAN]    = COLOR_CYAN,
 352         [QEMU_COLOR_RED]     = COLOR_RED,
 353         [QEMU_COLOR_MAGENTA] = COLOR_MAGENTA,
 354         [QEMU_COLOR_YELLOW]  = COLOR_YELLOW,
 355         [QEMU_COLOR_WHITE]   = COLOR_WHITE,
 356     };
 357
 358     /* input as raw as possible, let everything be interpreted
 359      * by the guest system */
 360     initscr(); noecho(); intrflush(stdscr, FALSE);
 361     nodelay(stdscr, TRUE); nonl(); keypad(stdscr, TRUE);
 362     start_color(); raw(); scrollok(stdscr, FALSE);
 363
 364     /* Make color pair to match color format (3bits bg:3bits fg) */
 365     for (i = 0; i < 64; i++) {
 366         init_pair(i, colour_default[i & 7], colour_default[i >> 3]);
 367     }
 368     /* Set default color for more than 64 for safety. */
 369     for (i = 64; i < COLOR_PAIRS; i++) {
 370         init_pair(i, COLOR_WHITE, COLOR_BLACK);
 371     }
 372
 373     /*
 374      * Setup mapping for vga to curses line graphics.
 375      * FIXME: for better font, have to use ncursesw and setlocale()
 376      */
 377 #if 0
 378     /* FIXME: map from where? */
 379     ACS_S1;
 380     ACS_S3;
 381     ACS_S7;
 382     ACS_S9;
 383 #endif
 384     /* ACS_* is not constant. So, we can't initialize statically. */
 385     vga_to_curses['\0'] = ' ';
 386     vga_to_curses[0x04] = ACS_DIAMOND;
 387     vga_to_curses[0x18] = ACS_UARROW;
 388     vga_to_curses[0x19] = ACS_DARROW;
 389     vga_to_curses[0x1a] = ACS_RARROW;
 390     vga_to_curses[0x1b] = ACS_LARROW;
 391     vga_to_curses[0x9c] = ACS_STERLING;
 392     vga_to_curses[0xb0] = ACS_BOARD;
 393     vga_to_curses[0xb1] = ACS_CKBOARD;
 394     vga_to_curses[0xb3] = ACS_VLINE;
 395     vga_to_curses[0xb4] = ACS_RTEE;
 396     vga_to_curses[0xbf] = ACS_URCORNER;
 397     vga_to_curses[0xc0] = ACS_LLCORNER;
 398     vga_to_curses[0xc1] = ACS_BTEE;
 399     vga_to_curses[0xc2] = ACS_TTEE;
 400     vga_to_curses[0xc3] = ACS_LTEE;
 401     vga_to_curses[0xc4] = ACS_HLINE;
 402     vga_to_curses[0xc5] = ACS_PLUS;
 403     vga_to_curses[0xce] = ACS_LANTERN;
 404     vga_to_curses[0xd8] = ACS_NEQUAL;
 405     vga_to_curses[0xd9] = ACS_LRCORNER;
 406     vga_to_curses[0xda] = ACS_ULCORNER;
 407     vga_to_curses[0xdb] = ACS_BLOCK;
 408     vga_to_curses[0xe3] = ACS_PI;
 409     vga_to_curses[0xf1] = ACS_PLMINUS;
 410     vga_to_curses[0xf2] = ACS_GEQUAL;
 411     vga_to_curses[0xf3] = ACS_LEQUAL;
 412     vga_to_curses[0xf8] = ACS_DEGREE;
 413     vga_to_curses[0xfe] = ACS_BULLET;
 414 }
 415
 416 static void curses_keyboard_setup(void)
 417 {
 418 #if defined(__APPLE__)
 419     /* always use generic keymaps */
 420     if (!keyboard_layout)
 421         keyboard_layout = "en-us";
 422 #endif
 423     if(keyboard_layout) {
 424         kbd_layout = init_keyboard_layout(name2keysym, keyboard_layout);
 425         if (!kbd_layout)
 426             exit(1);
 427     }
 428 }
 429
 430 static const DisplayChangeListenerOps dcl_ops = {
 431     .dpy_name        = "curses",
 432     .dpy_text_update = curses_update,
 433     .dpy_text_resize = curses_resize,
 434     .dpy_refresh     = curses_refresh,
 435     .dpy_text_cursor = curses_cursor_position,
 436 };
 437
 438 void curses_display_init(DisplayState *ds, DisplayOptions *opts)
 439 {
 440 #ifndef _WIN32
 441     if (!isatty(1)) {
 442         fprintf(stderr, "We need a terminal output\n");
 443         exit(1);
 444     }
 445 #endif
 446
 447     curses_setup();
 448     curses_keyboard_setup();
 449     atexit(curses_atexit);
 450
 451     curses_winch_init();
 452
 453     dcl = g_new0(DisplayChangeListener, 1);
 454     dcl->ops = &dcl_ops;
 455     register_displaychangelistener(dcl);
 456
 457     invalidate = 1;
 458 }