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 <curses.h>
  25
  26 #ifndef _WIN32
  27 #include <sys/ioctl.h>
  28 #include <termios.h>
  29 #endif
  30
  31 #ifdef __OpenBSD__
  32 #define resize_term resizeterm
  33 #endif
  34
  35 #include "qemu-common.h"
  36 #include "console.h"
  37 #include "sysemu.h"
  38
  39 #define FONT_HEIGHT 16
  40 #define FONT_WIDTH 8
  41
  42 static console_ch_t screen[160 * 100];
  43 static WINDOW *screenpad = NULL;
  44 static int width, height, gwidth, gheight, invalidate;
  45 static int px, py, sminx, sminy, smaxx, smaxy;
  46
  47 static void curses_update(DisplayState *ds, int x, int y, int w, int h)
  48 {
  49     chtype *line;
  50
  51     line = ((chtype *) screen) + y * width;
  52     for (h += y; y < h; y ++, line += width)
  53         mvwaddchnstr(screenpad, y, 0, line, width);
  54
  55     pnoutrefresh(screenpad, py, px, sminy, sminx, smaxy - 1, smaxx - 1);
  56     refresh();
  57 }
  58
  59 static void curses_calc_pad(void)
  60 {
  61     if (is_fixedsize_console()) {
  62         width = gwidth;
  63         height = gheight;
  64     } else {
  65         width = COLS;
  66         height = LINES;
  67     }
  68
  69     if (screenpad)
  70         delwin(screenpad);
  71
  72     clear();
  73     refresh();
  74
  75     screenpad = newpad(height, width);
  76
  77     if (width > COLS) {
  78         px = (width - COLS) / 2;
  79         sminx = 0;
  80         smaxx = COLS;
  81     } else {
  82         px = 0;
  83         sminx = (COLS - width) / 2;
  84         smaxx = sminx + width;
  85     }
  86
  87     if (height > LINES) {
  88         py = (height - LINES) / 2;
  89         sminy = 0;
  90         smaxy = LINES;
  91     } else {
  92         py = 0;
  93         sminy = (LINES - height) / 2;
  94         smaxy = sminy + height;
  95     }
  96 }
  97
  98 static void curses_resize(DisplayState *ds)
  99 {
 100     if (ds_get_width(ds) == gwidth && ds_get_height(ds) == gheight)
 101         return;
 102
 103     gwidth = ds_get_width(ds);
 104     gheight = ds_get_height(ds);
 105
 106     curses_calc_pad();
 107     ds->surface->width = width * FONT_WIDTH;
 108     ds->surface->height = height * FONT_HEIGHT;
 109 }
 110
 111 #ifndef _WIN32
 112 #if defined(SIGWINCH) && defined(KEY_RESIZE)
 113 static void curses_winch_handler(int signum)
 114 {
 115     struct winsize {
 116         unsigned short ws_row;
 117         unsigned short ws_col;
 118         unsigned short ws_xpixel;   /* unused */
 119         unsigned short ws_ypixel;   /* unused */
 120     } ws;
 121
 122     /* terminal size changed */
 123     if (ioctl(1, TIOCGWINSZ, &ws) == -1)
 124         return;
 125
 126     resize_term(ws.ws_row, ws.ws_col);
 127     curses_calc_pad();
 128     invalidate = 1;
 129
 130     /* some systems require this */
 131     signal(SIGWINCH, curses_winch_handler);
 132 }
 133 #endif
 134 #endif
 135
 136 static void curses_cursor_position(DisplayState *ds, int x, int y)
 137 {
 138     if (x >= 0) {
 139         x = sminx + x - px;
 140         y = sminy + y - py;
 141
 142         if (x >= 0 && y >= 0 && x < COLS && y < LINES) {
 143             move(y, x);
 144             curs_set(1);
 145             /* it seems that curs_set(1) must always be called before
 146              * curs_set(2) for the latter to have effect */
 147             if (!is_graphic_console())
 148                 curs_set(2);
 149             return;
 150         }
 151     }
 152
 153     curs_set(0);
 154 }
 155
 156 /* generic keyboard conversion */
 157
 158 #include "curses_keys.h"
 159
 160 static kbd_layout_t *kbd_layout = NULL;
 161
 162 static void curses_refresh(DisplayState *ds)
 163 {
 164     int chr, nextchr, keysym, keycode, keycode_alt;
 165
 166     if (invalidate) {
 167         clear();
 168         refresh();
 169         curses_calc_pad();
 170         ds->surface->width = FONT_WIDTH * width;
 171         ds->surface->height = FONT_HEIGHT * height;
 172         vga_hw_invalidate();
 173         invalidate = 0;
 174     }
 175
 176     vga_hw_text_update(screen);
 177
 178     nextchr = ERR;
 179     while (1) {
 180         /* while there are any pending key strokes to process */
 181         if (nextchr == ERR)
 182             chr = getch();
 183         else {
 184             chr = nextchr;
 185             nextchr = ERR;
 186         }
 187
 188         if (chr == ERR)
 189             break;
 190
 191 #ifdef KEY_RESIZE
 192         /* this shouldn't occur when we use a custom SIGWINCH handler */
 193         if (chr == KEY_RESIZE) {
 194             clear();
 195             refresh();
 196             curses_calc_pad();
 197             curses_update(ds, 0, 0, width, height);
 198             ds->surface->width = FONT_WIDTH * width;
 199             ds->surface->height = FONT_HEIGHT * height;
 200             continue;
 201         }
 202 #endif
 203
 204         keycode = curses2keycode[chr];
 205         keycode_alt = 0;
 206
 207         /* alt key */
 208         if (keycode == 1) {
 209             nextchr = getch();
 210
 211             if (nextchr != ERR) {
 212                 chr = nextchr;
 213                 keycode_alt = ALT;
 214                 keycode = curses2keycode[nextchr];
 215                 nextchr = ERR;
 216
 217                 if (keycode != -1) {
 218                     keycode |= ALT;
 219
 220                     /* process keys reserved for qemu */
 221                     if (keycode >= QEMU_KEY_CONSOLE0 &&
 222                             keycode < QEMU_KEY_CONSOLE0 + 9) {
 223                         erase();
 224                         wnoutrefresh(stdscr);
 225                         console_select(keycode - QEMU_KEY_CONSOLE0);
 226
 227                         invalidate = 1;
 228                         continue;
 229                     }
 230                 }
 231             }
 232         }
 233
 234         if (kbd_layout) {
 235             keysym = -1;
 236             if (chr < CURSES_KEYS)
 237                 keysym = curses2keysym[chr];
 238
 239             if (keysym == -1) {
 240                 if (chr < ' ') {
 241                     keysym = chr + '@';
 242                     if (keysym >= 'A' && keysym <= 'Z')
 243                         keysym += 'a' - 'A';
 244                     keysym |= KEYSYM_CNTRL;
 245                 } else
 246                     keysym = chr;
 247             }
 248
 249             keycode = keysym2scancode(kbd_layout, keysym & KEYSYM_MASK);
 250             if (keycode == 0)
 251                 continue;
 252
 253             keycode |= (keysym & ~KEYSYM_MASK) >> 16;
 254             keycode |= keycode_alt;
 255         }
 256
 257         if (keycode == -1)
 258             continue;
 259
 260         if (is_graphic_console()) {
 261             /* since terminals don't know about key press and release
 262              * events, we need to emit both for each key received */
 263             if (keycode & SHIFT)
 264                 kbd_put_keycode(SHIFT_CODE);
 265             if (keycode & CNTRL)
 266                 kbd_put_keycode(CNTRL_CODE);
 267             if (keycode & ALT)
 268                 kbd_put_keycode(ALT_CODE);
 269             if (keycode & ALTGR) {
 270                 kbd_put_keycode(SCANCODE_EMUL0);
 271                 kbd_put_keycode(ALT_CODE);
 272             }
 273             if (keycode & GREY)
 274                 kbd_put_keycode(GREY_CODE);
 275             kbd_put_keycode(keycode & KEY_MASK);
 276             if (keycode & GREY)
 277                 kbd_put_keycode(GREY_CODE);
 278             kbd_put_keycode((keycode & KEY_MASK) | KEY_RELEASE);
 279             if (keycode & ALTGR) {
 280                 kbd_put_keycode(SCANCODE_EMUL0);
 281                 kbd_put_keycode(ALT_CODE | KEY_RELEASE);
 282             }
 283             if (keycode & ALT)
 284                 kbd_put_keycode(ALT_CODE | KEY_RELEASE);
 285             if (keycode & CNTRL)
 286                 kbd_put_keycode(CNTRL_CODE | KEY_RELEASE);
 287             if (keycode & SHIFT)
 288                 kbd_put_keycode(SHIFT_CODE | KEY_RELEASE);
 289         } else {
 290             keysym = curses2qemu[chr];
 291             if (keysym == -1)
 292                 keysym = chr;
 293
 294             kbd_put_keysym(keysym);
 295         }
 296     }
 297 }
 298
 299 static void curses_atexit(void)
 300 {
 301     endwin();
 302 }
 303
 304 static void curses_setup(void)
 305 {
 306     int i, colour_default[8] = {
 307         COLOR_BLACK, COLOR_BLUE, COLOR_GREEN, COLOR_CYAN,
 308         COLOR_RED, COLOR_MAGENTA, COLOR_YELLOW, COLOR_WHITE,
 309     };
 310
 311     /* input as raw as possible, let everything be interpreted
 312      * by the guest system */
 313     initscr(); noecho(); intrflush(stdscr, FALSE);
 314     nodelay(stdscr, TRUE); nonl(); keypad(stdscr, TRUE);
 315     start_color(); raw(); scrollok(stdscr, FALSE);
 316
 317     for (i = 0; i < 64; i ++)
 318         init_pair(i, colour_default[i & 7], colour_default[i >> 3]);
 319 }
 320
 321 static void curses_keyboard_setup(void)
 322 {
 323 #if defined(__APPLE__)
 324     /* always use generic keymaps */
 325     if (!keyboard_layout)
 326         keyboard_layout = "en-us";
 327 #endif
 328     if(keyboard_layout) {
 329         kbd_layout = init_keyboard_layout(name2keysym, keyboard_layout);
 330         if (!kbd_layout)
 331             exit(1);
 332     }
 333 }
 334
 335 void curses_display_init(DisplayState *ds, int full_screen)
 336 {
 337     DisplayChangeListener *dcl;
 338 #ifndef _WIN32
 339     if (!isatty(1)) {
 340         fprintf(stderr, "We need a terminal output\n");
 341         exit(1);
 342     }
 343 #endif
 344
 345     curses_setup();
 346     curses_keyboard_setup();
 347     atexit(curses_atexit);
 348
 349 #ifndef _WIN32
 350 #if defined(SIGWINCH) && defined(KEY_RESIZE)
 351     /* some curses implementations provide a handler, but we
 352      * want to be sure this is handled regardless of the library */
 353     signal(SIGWINCH, curses_winch_handler);
 354 #endif
 355 #endif
 356
 357     dcl = (DisplayChangeListener *) g_malloc0(sizeof(DisplayChangeListener));
 358     dcl->dpy_update = curses_update;
 359     dcl->dpy_resize = curses_resize;
 360     dcl->dpy_refresh = curses_refresh;
 361     dcl->dpy_text_cursor = curses_cursor_position;
 362     register_displaychangelistener(ds, dcl);
 363     qemu_free_displaysurface(ds);
 364     ds->surface = qemu_create_displaysurface_from(640, 400, 0, 0, (uint8_t*) screen);
 365
 366     invalidate = 1;
 367 }