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      1 /*
      2  * QEMU curses/ncurses display driver
      3  *
      4  * Copyright (c) 2005 Andrzej Zaborowski  <balrog (at) 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 static int keycode2keysym[CURSES_KEYS];
    163 
    164 static void curses_refresh(DisplayState *ds)
    165 {
    166     int chr, nextchr, keysym, keycode;
    167 
    168     if (invalidate) {
    169         clear();
    170         refresh();
    171         curses_calc_pad();
    172         ds->surface->width = FONT_WIDTH * width;
    173         ds->surface->height = FONT_HEIGHT * height;
    174         vga_hw_invalidate();
    175         invalidate = 0;
    176     }
    177 
    178     vga_hw_text_update(screen);
    179 
    180     nextchr = ERR;
    181     while (1) {
    182         /* while there are any pending key strokes to process */
    183         if (nextchr == ERR)
    184             chr = getch();
    185         else {
    186             chr = nextchr;
    187             nextchr = ERR;
    188         }
    189 
    190         if (chr == ERR)
    191             break;
    192 
    193 #ifdef KEY_RESIZE
    194         /* this shouldn't occur when we use a custom SIGWINCH handler */
    195         if (chr == KEY_RESIZE) {
    196             clear();
    197             refresh();
    198             curses_calc_pad();
    199             curses_update(ds, 0, 0, width, height);
    200             ds->surface->width = FONT_WIDTH * width;
    201             ds->surface->height = FONT_HEIGHT * height;
    202             continue;
    203         }
    204 #endif
    205 
    206         keycode = curses2keycode[chr];
    207         if (keycode == -1)
    208             continue;
    209 
    210         /* alt key */
    211         if (keycode == 1) {
    212             nextchr = getch();
    213 
    214             if (nextchr != ERR) {
    215                 keycode = curses2keycode[nextchr];
    216                 nextchr = ERR;
    217                 if (keycode == -1)
    218                     continue;
    219 
    220                 keycode |= ALT;
    221 
    222                 /* process keys reserved for qemu */
    223                 if (keycode >= QEMU_KEY_CONSOLE0 &&
    224                         keycode < QEMU_KEY_CONSOLE0 + 9) {
    225                     erase();
    226                     wnoutrefresh(stdscr);
    227                     console_select(keycode - QEMU_KEY_CONSOLE0);
    228 
    229                     invalidate = 1;
    230                     continue;
    231                 }
    232             }
    233         }
    234 
    235         if (kbd_layout && !(keycode & GREY)) {
    236             keysym = keycode2keysym[keycode & KEY_MASK];
    237             if (keysym == -1)
    238                 keysym = chr;
    239 
    240             keycode &= ~KEY_MASK;
    241             keycode |= keysym2scancode(kbd_layout, keysym);
    242         }
    243 
    244         if (is_graphic_console()) {
    245             /* since terminals don't know about key press and release
    246              * events, we need to emit both for each key received */
    247             if (keycode & SHIFT)
    248                 kbd_put_keycode(SHIFT_CODE);
    249             if (keycode & CNTRL)
    250                 kbd_put_keycode(CNTRL_CODE);
    251             if (keycode & ALT)
    252                 kbd_put_keycode(ALT_CODE);
    253             if (keycode & GREY)
    254                 kbd_put_keycode(GREY_CODE);
    255             kbd_put_keycode(keycode & KEY_MASK);
    256             if (keycode & GREY)
    257                 kbd_put_keycode(GREY_CODE);
    258             kbd_put_keycode((keycode & KEY_MASK) | KEY_RELEASE);
    259             if (keycode & ALT)
    260                 kbd_put_keycode(ALT_CODE | KEY_RELEASE);
    261             if (keycode & CNTRL)
    262                 kbd_put_keycode(CNTRL_CODE | KEY_RELEASE);
    263             if (keycode & SHIFT)
    264                 kbd_put_keycode(SHIFT_CODE | KEY_RELEASE);
    265         } else {
    266             keysym = curses2keysym[chr];
    267             if (keysym == -1)
    268                 keysym = chr;
    269 
    270             kbd_put_keysym(keysym);
    271         }
    272     }
    273 }
    274 
    275 static void curses_cleanup(void *opaque)
    276 {
    277     endwin();
    278 }
    279 
    280 static void curses_atexit(void)
    281 {
    282     curses_cleanup(NULL);
    283 }
    284 
    285 static void curses_setup(void)
    286 {
    287     int i, colour_default[8] = {
    288         COLOR_BLACK, COLOR_BLUE, COLOR_GREEN, COLOR_CYAN,
    289         COLOR_RED, COLOR_MAGENTA, COLOR_YELLOW, COLOR_WHITE,
    290     };
    291 
    292     /* input as raw as possible, let everything be interpreted
    293      * by the guest system */
    294     initscr(); noecho(); intrflush(stdscr, FALSE);
    295     nodelay(stdscr, TRUE); nonl(); keypad(stdscr, TRUE);
    296     start_color(); raw(); scrollok(stdscr, FALSE);
    297 
    298     for (i = 0; i < 64; i ++)
    299         init_pair(i, colour_default[i & 7], colour_default[i >> 3]);
    300 }
    301 
    302 static void curses_keyboard_setup(void)
    303 {
    304     int i, keycode, keysym;
    305 
    306 #if defined(__APPLE__)
    307     /* always use generic keymaps */
    308     if (!keyboard_layout)
    309         keyboard_layout = "en-us";
    310 #endif
    311     if(keyboard_layout) {
    312         kbd_layout = init_keyboard_layout(name2keysym, keyboard_layout);
    313         if (!kbd_layout)
    314             exit(1);
    315     }
    316 
    317     for (i = 0; i < CURSES_KEYS; i ++)
    318         keycode2keysym[i] = -1;
    319 
    320     for (i = 0; i < CURSES_KEYS; i ++) {
    321         if (curses2keycode[i] == -1)
    322             continue;
    323 
    324         keycode = curses2keycode[i] & KEY_MASK;
    325         if (keycode2keysym[keycode] >= 0)
    326             continue;
    327 
    328         for (keysym = 0; keysym < CURSES_KEYS; keysym ++)
    329             if (curses2keycode[keysym] == keycode) {
    330                 keycode2keysym[keycode] = keysym;
    331                 break;
    332             }
    333 
    334         if (keysym >= CURSES_KEYS)
    335             keycode2keysym[keycode] = i;
    336     }
    337 }
    338 
    339 void curses_display_init(DisplayState *ds, int full_screen)
    340 {
    341     DisplayChangeListener *dcl;
    342 #ifndef _WIN32
    343     if (!isatty(1)) {
    344         fprintf(stderr, "We need a terminal output\n");
    345         exit(1);
    346     }
    347 #endif
    348 
    349     curses_setup();
    350     curses_keyboard_setup();
    351     atexit(curses_atexit);
    352 
    353 #ifndef _WIN32
    354 #if defined(SIGWINCH) && defined(KEY_RESIZE)
    355     /* some curses implementations provide a handler, but we
    356      * want to be sure this is handled regardless of the library */
    357     signal(SIGWINCH, curses_winch_handler);
    358 #endif
    359 #endif
    360 
    361     dcl = (DisplayChangeListener *) qemu_mallocz(sizeof(DisplayChangeListener));
    362     dcl->dpy_update = curses_update;
    363     dcl->dpy_resize = curses_resize;
    364     dcl->dpy_refresh = curses_refresh;
    365     dcl->dpy_text_cursor = curses_cursor_position;
    366     register_displaychangelistener(ds, dcl);
    367     qemu_free_displaysurface(ds);
    368     ds->surface = qemu_create_displaysurface_from(640, 400, 0, 0, (uint8_t*) screen);
    369 
    370     invalidate = 1;
    371 }
    372