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
  25 #include "qemu-common.h"
  26 #include "console.h"
  27 #include "sysemu.h"
  28
  29 #include <curses.h>
  30
  31 #ifndef _WIN32
  32 #include <signal.h>
  33 #include <sys/ioctl.h>
  34 #include <termios.h>
  35 #endif
  36
  37 #define FONT_HEIGHT 16
  38 #define FONT_WIDTH 8
  39
  40 static console_ch_t screen[160 * 100];
  41 static WINDOW *screenpad = NULL;
  42 static int width, height, gwidth, gheight, invalidate;
  43 static int px, py, sminx, sminy, smaxx, smaxy;
  44
  45 static void curses_update(DisplayState *ds, 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 (is_graphic_console()) {
  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(DisplayState *ds, int w, int h)
  97 {
  98     if (w == gwidth && h == gheight)
  99         return;
 100
 101     gwidth = w;
 102     gheight = h;
 103
 104     curses_calc_pad();
 105 }
 106
 107 #ifndef _WIN32
 108 #if defined(SIGWINCH) && defined(KEY_RESIZE)
 109 static void curses_winch_handler(int signum)
 110 {
 111     struct winsize {
 112         unsigned short ws_row;
 113         unsigned short ws_col;
 114         unsigned short ws_xpixel;   /* unused */
 115         unsigned short ws_ypixel;   /* unused */
 116     } ws;
 117
 118     /* terminal size changed */
 119     if (ioctl(1, TIOCGWINSZ, &ws) == -1)
 120         return;
 121
 122     resize_term(ws.ws_row, ws.ws_col);
 123     curses_calc_pad();
 124     invalidate = 1;
 125
 126     /* some systems require this */
 127     signal(SIGWINCH, curses_winch_handler);
 128 }
 129 #endif
 130 #endif
 131
 132 static void curses_cursor_position(DisplayState *ds, int x, int y)
 133 {
 134     if (x >= 0) {
 135         x = sminx + x - px;
 136         y = sminy + y - py;
 137
 138         if (x >= 0 && y >= 0 && x < COLS && y < LINES) {
 139             move(y, x);
 140             curs_set(1);
 141             /* it seems that curs_set(1) must always be called before
 142              * curs_set(2) for the latter to have effect */
 143             if (!is_graphic_console())
 144                 curs_set(2);
 145             return;
 146         }
 147     }
 148
 149     curs_set(0);
 150 }
 151
 152 /* generic keyboard conversion */
 153
 154 #include "curses_keys.h"
 155 #include "keymaps.c"
 156
 157 static kbd_layout_t *kbd_layout = 0;
 158 static int keycode2keysym[CURSES_KEYS];
 159
 160 static void curses_refresh(DisplayState *ds)
 161 {
 162     int chr, nextchr, keysym, keycode;
 163
 164     if (invalidate) {
 165         clear();
 166         refresh();
 167         curses_calc_pad();
 168         ds->width = FONT_WIDTH * width;
 169         ds->height = FONT_HEIGHT * height;
 170         vga_hw_invalidate();
 171         invalidate = 0;
 172     }
 173
 174     vga_hw_text_update(screen);
 175
 176     nextchr = ERR;
 177     while (1) {
 178         /* while there are any pending key strokes to process */
 179         if (nextchr == ERR)
 180             chr = getch();
 181         else {
 182             chr = nextchr;
 183             nextchr = ERR;
 184         }
 185
 186         if (chr == ERR)
 187             break;
 188
 189 #ifdef KEY_RESIZE
 190         /* this shouldn't occur when we use a custom SIGWINCH handler */
 191         if (chr == KEY_RESIZE) {
 192             clear();
 193             refresh();
 194             curses_calc_pad();
 195             curses_update(ds, 0, 0, width, height);
 196             ds->width = FONT_WIDTH * width;
 197             ds->height = FONT_HEIGHT * height;
 198             continue;
 199         }
 200 #endif
 201
 202         keycode = curses2keycode[chr];
 203         if (keycode == -1)
 204             continue;
 205
 206         /* alt key */
 207         if (keycode == 1) {
 208             nextchr = getch();
 209
 210             if (nextchr != ERR) {
 211                 keycode = curses2keycode[nextchr];
 212                 nextchr = ERR;
 213                 if (keycode == -1)
 214                     continue;
 215
 216                 keycode |= ALT;
 217
 218                 /* process keys reserved for qemu */
 219                 if (keycode >= QEMU_KEY_CONSOLE0 &&
 220                         keycode < QEMU_KEY_CONSOLE0 + 9) {
 221                     erase();
 222                     wnoutrefresh(stdscr);
 223                     console_select(keycode - QEMU_KEY_CONSOLE0);
 224
 225                     invalidate = 1;
 226                     continue;
 227                 }
 228             }
 229         }
 230
 231         if (kbd_layout && !(keycode & GREY)) {
 232             keysym = keycode2keysym[keycode & KEY_MASK];
 233             if (keysym == -1)
 234                 keysym = chr;
 235
 236             keycode &= ~KEY_MASK;
 237             keycode |= keysym2scancode(kbd_layout, keysym);
 238         }
 239
 240         if (is_graphic_console()) {
 241             /* since terminals don't know about key press and release
 242              * events, we need to emit both for each key received */
 243             if (keycode & SHIFT)
 244                 kbd_put_keycode(SHIFT_CODE);
 245             if (keycode & CNTRL)
 246                 kbd_put_keycode(CNTRL_CODE);
 247             if (keycode & ALT)
 248                 kbd_put_keycode(ALT_CODE);
 249             if (keycode & GREY)
 250                 kbd_put_keycode(GREY_CODE);
 251             kbd_put_keycode(keycode & KEY_MASK);
 252             if (keycode & GREY)
 253                 kbd_put_keycode(GREY_CODE);
 254             kbd_put_keycode((keycode & KEY_MASK) | KEY_RELEASE);
 255             if (keycode & ALT)
 256                 kbd_put_keycode(ALT_CODE | KEY_RELEASE);
 257             if (keycode & CNTRL)
 258                 kbd_put_keycode(CNTRL_CODE | KEY_RELEASE);
 259             if (keycode & SHIFT)
 260                 kbd_put_keycode(SHIFT_CODE | KEY_RELEASE);
 261         } else {
 262             keysym = curses2keysym[chr];
 263             if (keysym == -1)
 264                 keysym = chr;
 265
 266             kbd_put_keysym(keysym);
 267         }
 268     }
 269 }
 270
 271 static void curses_cleanup(void *opaque)
 272 {
 273     endwin();
 274 }
 275
 276 static void curses_atexit(void)
 277 {
 278     curses_cleanup(NULL);
 279 }
 280
 281 static void curses_setup(void)
 282 {
 283     int i, colour_default[8] = {
 284         COLOR_BLACK, COLOR_BLUE, COLOR_GREEN, COLOR_CYAN,
 285         COLOR_RED, COLOR_MAGENTA, COLOR_YELLOW, COLOR_WHITE,
 286     };
 287
 288     /* input as raw as possible, let everything be interpreted
 289      * by the guest system */
 290     initscr(); noecho(); intrflush(stdscr, FALSE);
 291     nodelay(stdscr, TRUE); nonl(); keypad(stdscr, TRUE);
 292     start_color(); raw(); scrollok(stdscr, FALSE);
 293
 294     for (i = 0; i < 64; i ++)
 295         init_pair(i, colour_default[i & 7], colour_default[i >> 3]);
 296 }
 297
 298 static void curses_keyboard_setup(void)
 299 {
 300     int i, keycode, keysym;
 301
 302 #if defined(__APPLE__)
 303     /* always use generic keymaps */
 304     if (!keyboard_layout)
 305         keyboard_layout = "en-us";
 306 #endif
 307     if(keyboard_layout) {
 308         kbd_layout = init_keyboard_layout(keyboard_layout);
 309         if (!kbd_layout)
 310             exit(1);
 311     }
 312
 313     for (i = 0; i < CURSES_KEYS; i ++)
 314         keycode2keysym[i] = -1;
 315
 316     for (i = 0; i < CURSES_KEYS; i ++) {
 317         if (curses2keycode[i] == -1)
 318             continue;
 319
 320         keycode = curses2keycode[i] & KEY_MASK;
 321         if (keycode2keysym[keycode] >= 0)
 322             continue;
 323
 324         for (keysym = 0; keysym < CURSES_KEYS; keysym ++)
 325             if (curses2keycode[keysym] == keycode) {
 326                 keycode2keysym[keycode] = keysym;
 327                 break;
 328             }
 329
 330         if (keysym >= CURSES_KEYS)
 331             keycode2keysym[keycode] = i;
 332     }
 333 }
 334
 335 void curses_display_init(DisplayState *ds, int full_screen)
 336 {
 337 #ifndef _WIN32
 338     if (!isatty(1)) {
 339         fprintf(stderr, "We need a terminal output\n");
 340         exit(1);
 341     }
 342 #endif
 343
 344     curses_setup();
 345     curses_keyboard_setup();
 346     atexit(curses_atexit);
 347
 348 #ifndef _WIN32
 349     signal(SIGINT, SIG_DFL);
 350     signal(SIGQUIT, SIG_DFL);
 351 #if defined(SIGWINCH) && defined(KEY_RESIZE)
 352     /* some curses implementations provide a handler, but we
 353      * want to be sure this is handled regardless of the library */
 354     signal(SIGWINCH, curses_winch_handler);
 355 #endif
 356 #endif
 357
 358     ds->data = (void *) screen;
 359     ds->linesize = 0;
 360     ds->depth = 0;
 361     ds->width = 640;
 362     ds->height = 400;
 363     ds->dpy_update = curses_update;
 364     ds->dpy_resize = curses_resize;
 365     ds->dpy_refresh = curses_refresh;
 366     ds->dpy_text_cursor = curses_cursor_position;
 367
 368     invalidate = 1;
 369
 370     /* Standard VGA initial text mode dimensions */
 371     curses_resize(ds, 80, 25);
 372 }