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 <curses.h>
  25
  26 #ifndef _WIN32
  27 #include <signal.h>
  28 #include <sys/ioctl.h>
  29 #include <termios.h>
  30 #endif
  31
  32 #ifdef __OpenBSD__
  33 #define resize_term resizeterm
  34 #endif
  35
  36 #include "qemu-common.h"
  37 #include "console.h"
  38 #include "sysemu.h"
  39
  40 #define FONT_HEIGHT 16
  41 #define FONT_WIDTH 8
  42
  43 static console_ch_t screen[160 * 100];
  44 static WINDOW *screenpad = NULL;
  45 static int width, height, gwidth, gheight, invalidate;
  46 static int px, py, sminx, sminy, smaxx, smaxy;
  47
  48 static void curses_update(DisplayState *ds, int x, int y, int w, int h)
  49 {
  50     chtype *line;
  51
  52     line = ((chtype *) screen) + y * width;
  53     for (h += y; y < h; y ++, line += width)
  54         mvwaddchnstr(screenpad, y, 0, line, width);
  55
  56     pnoutrefresh(screenpad, py, px, sminy, sminx, smaxy - 1, smaxx - 1);
  57     refresh();
  58 }
  59
  60 static void curses_calc_pad(void)
  61 {
  62     if (is_fixedsize_console()) {
  63         width = gwidth;
  64         height = gheight;
  65     } else {
  66         width = COLS;
  67         height = LINES;
  68     }
  69
  70     if (screenpad)
  71         delwin(screenpad);
  72
  73     clear();
  74     refresh();
  75
  76     screenpad = newpad(height, width);
  77
  78     if (width > COLS) {
  79         px = (width - COLS) / 2;
  80         sminx = 0;
  81         smaxx = COLS;
  82     } else {
  83         px = 0;
  84         sminx = (COLS - width) / 2;
  85         smaxx = sminx + width;
  86     }
  87
  88     if (height > LINES) {
  89         py = (height - LINES) / 2;
  90         sminy = 0;
  91         smaxy = LINES;
  92     } else {
  93         py = 0;
  94         sminy = (LINES - height) / 2;
  95         smaxy = sminy + height;
  96     }
  97 }
  98
  99 static void curses_resize(DisplayState *ds)
 100 {
 101     if (ds_get_width(ds) == gwidth && ds_get_height(ds) == gheight)
 102         return;
 103
 104     gwidth = ds_get_width(ds);
 105     gheight = ds_get_height(ds);
 106
 107     curses_calc_pad();
 108     ds->surface->width = width * FONT_WIDTH;
 109     ds->surface->height = height * FONT_HEIGHT;
 110 }
 111
 112 #ifndef _WIN32
 113 #if defined(SIGWINCH) && defined(KEY_RESIZE)
 114 static void curses_winch_handler(int signum)
 115 {
 116     struct winsize {
 117         unsigned short ws_row;
 118         unsigned short ws_col;
 119         unsigned short ws_xpixel;   /* unused */
 120         unsigned short ws_ypixel;   /* unused */
 121     } ws;
 122
 123     /* terminal size changed */
 124     if (ioctl(1, TIOCGWINSZ, &ws) == -1)
 125         return;
 126
 127     resize_term(ws.ws_row, ws.ws_col);
 128     curses_calc_pad();
 129     invalidate = 1;
 130
 131     /* some systems require this */
 132     signal(SIGWINCH, curses_winch_handler);
 133 }
 134 #endif
 135 #endif
 136
 137 static void curses_cursor_position(DisplayState *ds, int x, int y)
 138 {
 139     if (x >= 0) {
 140         x = sminx + x - px;
 141         y = sminy + y - py;
 142
 143         if (x >= 0 && y >= 0 && x < COLS && y < LINES) {
 144             move(y, x);
 145             curs_set(1);
 146             /* it seems that curs_set(1) must always be called before
 147              * curs_set(2) for the latter to have effect */
 148             if (!is_graphic_console())
 149                 curs_set(2);
 150             return;
 151         }
 152     }
 153
 154     curs_set(0);
 155 }
 156
 157 /* generic keyboard conversion */
 158
 159 #include "curses_keys.h"
 160
 161 static kbd_layout_t *kbd_layout = NULL;
 162
 163 static void curses_refresh(DisplayState *ds)
 164 {
 165     int chr, nextchr, keysym, keycode, keycode_alt;
 166
 167     if (invalidate) {
 168         clear();
 169         refresh();
 170         curses_calc_pad();
 171         ds->surface->width = FONT_WIDTH * width;
 172         ds->surface->height = FONT_HEIGHT * height;
 173         vga_hw_invalidate();
 174         invalidate = 0;
 175     }
 176
 177     vga_hw_text_update(screen);
 178
 179     nextchr = ERR;
 180     while (1) {
 181         /* while there are any pending key strokes to process */
 182         if (nextchr == ERR)
 183             chr = getch();
 184         else {
 185             chr = nextchr;
 186             nextchr = ERR;
 187         }
 188
 189         if (chr == ERR)
 190             break;
 191
 192 #ifdef KEY_RESIZE
 193         /* this shouldn't occur when we use a custom SIGWINCH handler */
 194         if (chr == KEY_RESIZE) {
 195             clear();
 196             refresh();
 197             curses_calc_pad();
 198             curses_update(ds, 0, 0, width, height);
 199             ds->surface->width = FONT_WIDTH * width;
 200             ds->surface->height = FONT_HEIGHT * height;
 201             continue;
 202         }
 203 #endif
 204
 205         keycode = curses2keycode[chr];
 206         keycode_alt = 0;
 207
 208         /* alt key */
 209         if (keycode == 1) {
 210             nextchr = getch();
 211
 212             if (nextchr != ERR) {
 213                 chr = nextchr;
 214                 keycode_alt = ALT;
 215                 keycode = curses2keycode[nextchr];
 216                 nextchr = ERR;
 217
 218                 if (keycode != -1) {
 219                     keycode |= ALT;
 220
 221                     /* process keys reserved for qemu */
 222                     if (keycode >= QEMU_KEY_CONSOLE0 &&
 223                             keycode < QEMU_KEY_CONSOLE0 + 9) {
 224                         erase();
 225                         wnoutrefresh(stdscr);
 226                         console_select(keycode - QEMU_KEY_CONSOLE0);
 227
 228                         invalidate = 1;
 229                         continue;
 230                     }
 231                 }
 232             }
 233         }
 234
 235         if (kbd_layout) {
 236             keysym = -1;
 237             if (chr < CURSES_KEYS)
 238                 keysym = curses2keysym[chr];
 239
 240             if (keysym == -1) {
 241                 if (chr < ' ')
 242                     keysym = (chr + '@' - 'A' + 'a') | KEYSYM_CNTRL;
 243                 else
 244                     keysym = chr;
 245             }
 246
 247             keycode = keysym2scancode(kbd_layout, keysym & KEYSYM_MASK);
 248             if (keycode == 0)
 249                 continue;
 250
 251             keycode |= (keysym & ~KEYSYM_MASK) >> 16;
 252             keycode |= keycode_alt;
 253         }
 254
 255         if (keycode == -1)
 256             continue;
 257
 258         if (is_graphic_console()) {
 259             /* since terminals don't know about key press and release
 260              * events, we need to emit both for each key received */
 261             if (keycode & SHIFT)
 262                 kbd_put_keycode(SHIFT_CODE);
 263             if (keycode & CNTRL)
 264                 kbd_put_keycode(CNTRL_CODE);
 265             if (keycode & ALT)
 266                 kbd_put_keycode(ALT_CODE);
 267             if (keycode & ALTGR) {
 268                 kbd_put_keycode(SCANCODE_EMUL0);
 269                 kbd_put_keycode(ALT_CODE);
 270             }
 271             if (keycode & GREY)
 272                 kbd_put_keycode(GREY_CODE);
 273             kbd_put_keycode(keycode & KEY_MASK);
 274             if (keycode & GREY)
 275                 kbd_put_keycode(GREY_CODE);
 276             kbd_put_keycode((keycode & KEY_MASK) | KEY_RELEASE);
 277             if (keycode & ALTGR) {
 278                 kbd_put_keycode(SCANCODE_EMUL0);
 279                 kbd_put_keycode(ALT_CODE | KEY_RELEASE);
 280             }
 281             if (keycode & ALT)
 282                 kbd_put_keycode(ALT_CODE | KEY_RELEASE);
 283             if (keycode & CNTRL)
 284                 kbd_put_keycode(CNTRL_CODE | KEY_RELEASE);
 285             if (keycode & SHIFT)
 286                 kbd_put_keycode(SHIFT_CODE | KEY_RELEASE);
 287         } else {
 288             keysym = curses2qemu[chr];
 289             if (keysym == -1)
 290                 keysym = chr;
 291
 292             kbd_put_keysym(keysym);
 293         }
 294     }
 295 }
 296
 297 static void curses_atexit(void)
 298 {
 299     endwin();
 300 }
 301
 302 static void curses_setup(void)
 303 {
 304     int i, colour_default[8] = {
 305         COLOR_BLACK, COLOR_BLUE, COLOR_GREEN, COLOR_CYAN,
 306         COLOR_RED, COLOR_MAGENTA, COLOR_YELLOW, COLOR_WHITE,
 307     };
 308
 309     /* input as raw as possible, let everything be interpreted
 310      * by the guest system */
 311     initscr(); noecho(); intrflush(stdscr, FALSE);
 312     nodelay(stdscr, TRUE); nonl(); keypad(stdscr, TRUE);
 313     start_color(); raw(); scrollok(stdscr, FALSE);
 314
 315     for (i = 0; i < 64; i ++)
 316         init_pair(i, colour_default[i & 7], colour_default[i >> 3]);
 317 }
 318
 319 static void curses_keyboard_setup(void)
 320 {
 321 #if defined(__APPLE__)
 322     /* always use generic keymaps */
 323     if (!keyboard_layout)
 324         keyboard_layout = "en-us";
 325 #endif
 326     if(keyboard_layout) {
 327         kbd_layout = init_keyboard_layout(name2keysym, keyboard_layout);
 328         if (!kbd_layout)
 329             exit(1);
 330     }
 331 }
 332
 333 void curses_display_init(DisplayState *ds, int full_screen)
 334 {
 335     DisplayChangeListener *dcl;
 336 #ifndef _WIN32
 337     if (!isatty(1)) {
 338         fprintf(stderr, "We need a terminal output\n");
 339         exit(1);
 340     }
 341 #endif
 342
 343     curses_setup();
 344     curses_keyboard_setup();
 345     atexit(curses_atexit);
 346
 347 #ifndef _WIN32
 348 #if defined(SIGWINCH) && defined(KEY_RESIZE)
 349     /* some curses implementations provide a handler, but we
 350      * want to be sure this is handled regardless of the library */
 351     signal(SIGWINCH, curses_winch_handler);
 352 #endif
 353 #endif
 354
 355     dcl = (DisplayChangeListener *) qemu_mallocz(sizeof(DisplayChangeListener));
 356     dcl->dpy_update = curses_update;
 357     dcl->dpy_resize = curses_resize;
 358     dcl->dpy_refresh = curses_refresh;
 359     dcl->dpy_text_cursor = curses_cursor_position;
 360     register_displaychangelistener(ds, dcl);
 361     qemu_free_displaysurface(ds);
 362     ds->surface = qemu_create_displaysurface_from(640, 400, 0, 0, (uint8_t*) screen);
 363
 364     invalidate = 1;
 365 }