File:  [Qemu by Fabrice Bellard] / qemu / curses.c
Revision 1.1.1.1 (vendor branch): download - view: text, annotated - select for diffs
Tue Apr 24 16:51:01 2018 UTC (3 years, 1 month ago) by root
Branches: qemu, MAIN
CVS tags: qemu0105, qemu0104, qemu0103, qemu0102, qemu0101, qemu0100, HEAD
qemu 0.10.0

    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: #ifdef __OpenBSD__
   38: #define resize_term resizeterm
   39: #endif
   40: 
   41: #define FONT_HEIGHT 16
   42: #define FONT_WIDTH 8
   43: 
   44: static console_ch_t screen[160 * 100];
   45: static WINDOW *screenpad = NULL;
   46: static int width, height, gwidth, gheight, invalidate;
   47: static int px, py, sminx, sminy, smaxx, smaxy;
   48: 
   49: static void curses_update(DisplayState *ds, int x, int y, int w, int h)
   50: {
   51:     chtype *line;
   52: 
   53:     line = ((chtype *) screen) + y * width;
   54:     for (h += y; y < h; y ++, line += width)
   55:         mvwaddchnstr(screenpad, y, 0, line, width);
   56: 
   57:     pnoutrefresh(screenpad, py, px, sminy, sminx, smaxy - 1, smaxx - 1);
   58:     refresh();
   59: }
   60: 
   61: static void curses_calc_pad(void)
   62: {
   63:     if (is_fixedsize_console()) {
   64:         width = gwidth;
   65:         height = gheight;
   66:     } else {
   67:         width = COLS;
   68:         height = LINES;
   69:     }
   70: 
   71:     if (screenpad)
   72:         delwin(screenpad);
   73: 
   74:     clear();
   75:     refresh();
   76: 
   77:     screenpad = newpad(height, width);
   78: 
   79:     if (width > COLS) {
   80:         px = (width - COLS) / 2;
   81:         sminx = 0;
   82:         smaxx = COLS;
   83:     } else {
   84:         px = 0;
   85:         sminx = (COLS - width) / 2;
   86:         smaxx = sminx + width;
   87:     }
   88: 
   89:     if (height > LINES) {
   90:         py = (height - LINES) / 2;
   91:         sminy = 0;
   92:         smaxy = LINES;
   93:     } else {
   94:         py = 0;
   95:         sminy = (LINES - height) / 2;
   96:         smaxy = sminy + height;
   97:     }
   98: }
   99: 
  100: static void curses_resize(DisplayState *ds)
  101: {
  102:     if (ds_get_width(ds) == gwidth && ds_get_height(ds) == gheight)
  103:         return;
  104: 
  105:     gwidth = ds_get_width(ds);
  106:     gheight = ds_get_height(ds);
  107: 
  108:     curses_calc_pad();
  109:     ds->surface->width = width * FONT_WIDTH;
  110:     ds->surface->height = height * FONT_HEIGHT;
  111: }
  112: 
  113: #ifndef _WIN32
  114: #if defined(SIGWINCH) && defined(KEY_RESIZE)
  115: static void curses_winch_handler(int signum)
  116: {
  117:     struct winsize {
  118:         unsigned short ws_row;
  119:         unsigned short ws_col;
  120:         unsigned short ws_xpixel;   /* unused */
  121:         unsigned short ws_ypixel;   /* unused */
  122:     } ws;
  123: 
  124:     /* terminal size changed */
  125:     if (ioctl(1, TIOCGWINSZ, &ws) == -1)
  126:         return;
  127: 
  128:     resize_term(ws.ws_row, ws.ws_col);
  129:     curses_calc_pad();
  130:     invalidate = 1;
  131: 
  132:     /* some systems require this */
  133:     signal(SIGWINCH, curses_winch_handler);
  134: }
  135: #endif
  136: #endif
  137: 
  138: static void curses_cursor_position(DisplayState *ds, int x, int y)
  139: {
  140:     if (x >= 0) {
  141:         x = sminx + x - px;
  142:         y = sminy + y - py;
  143: 
  144:         if (x >= 0 && y >= 0 && x < COLS && y < LINES) {
  145:             move(y, x);
  146:             curs_set(1);
  147:             /* it seems that curs_set(1) must always be called before
  148:              * curs_set(2) for the latter to have effect */
  149:             if (!is_graphic_console())
  150:                 curs_set(2);
  151:             return;
  152:         }
  153:     }
  154: 
  155:     curs_set(0);
  156: }
  157: 
  158: /* generic keyboard conversion */
  159: 
  160: #include "curses_keys.h"
  161: #include "keymaps.c"
  162: 
  163: static kbd_layout_t *kbd_layout = 0;
  164: static int keycode2keysym[CURSES_KEYS];
  165: 
  166: static void curses_refresh(DisplayState *ds)
  167: {
  168:     int chr, nextchr, keysym, keycode;
  169: 
  170:     if (invalidate) {
  171:         clear();
  172:         refresh();
  173:         curses_calc_pad();
  174:         ds->surface->width = FONT_WIDTH * width;
  175:         ds->surface->height = FONT_HEIGHT * height;
  176:         vga_hw_invalidate();
  177:         invalidate = 0;
  178:     }
  179: 
  180:     vga_hw_text_update(screen);
  181: 
  182:     nextchr = ERR;
  183:     while (1) {
  184:         /* while there are any pending key strokes to process */
  185:         if (nextchr == ERR)
  186:             chr = getch();
  187:         else {
  188:             chr = nextchr;
  189:             nextchr = ERR;
  190:         }
  191: 
  192:         if (chr == ERR)
  193:             break;
  194: 
  195: #ifdef KEY_RESIZE
  196:         /* this shouldn't occur when we use a custom SIGWINCH handler */
  197:         if (chr == KEY_RESIZE) {
  198:             clear();
  199:             refresh();
  200:             curses_calc_pad();
  201:             curses_update(ds, 0, 0, width, height);
  202:             ds->surface->width = FONT_WIDTH * width;
  203:             ds->surface->height = FONT_HEIGHT * height;
  204:             continue;
  205:         }
  206: #endif
  207: 
  208:         keycode = curses2keycode[chr];
  209:         if (keycode == -1)
  210:             continue;
  211: 
  212:         /* alt key */
  213:         if (keycode == 1) {
  214:             nextchr = getch();
  215: 
  216:             if (nextchr != ERR) {
  217:                 keycode = curses2keycode[nextchr];
  218:                 nextchr = ERR;
  219:                 if (keycode == -1)
  220:                     continue;
  221: 
  222:                 keycode |= ALT;
  223: 
  224:                 /* process keys reserved for qemu */
  225:                 if (keycode >= QEMU_KEY_CONSOLE0 &&
  226:                         keycode < QEMU_KEY_CONSOLE0 + 9) {
  227:                     erase();
  228:                     wnoutrefresh(stdscr);
  229:                     console_select(keycode - QEMU_KEY_CONSOLE0);
  230: 
  231:                     invalidate = 1;
  232:                     continue;
  233:                 }
  234:             }
  235:         }
  236: 
  237:         if (kbd_layout && !(keycode & GREY)) {
  238:             keysym = keycode2keysym[keycode & KEY_MASK];
  239:             if (keysym == -1)
  240:                 keysym = chr;
  241: 
  242:             keycode &= ~KEY_MASK;
  243:             keycode |= keysym2scancode(kbd_layout, keysym);
  244:         }
  245: 
  246:         if (is_graphic_console()) {
  247:             /* since terminals don't know about key press and release
  248:              * events, we need to emit both for each key received */
  249:             if (keycode & SHIFT)
  250:                 kbd_put_keycode(SHIFT_CODE);
  251:             if (keycode & CNTRL)
  252:                 kbd_put_keycode(CNTRL_CODE);
  253:             if (keycode & ALT)
  254:                 kbd_put_keycode(ALT_CODE);
  255:             if (keycode & GREY)
  256:                 kbd_put_keycode(GREY_CODE);
  257:             kbd_put_keycode(keycode & KEY_MASK);
  258:             if (keycode & GREY)
  259:                 kbd_put_keycode(GREY_CODE);
  260:             kbd_put_keycode((keycode & KEY_MASK) | KEY_RELEASE);
  261:             if (keycode & ALT)
  262:                 kbd_put_keycode(ALT_CODE | KEY_RELEASE);
  263:             if (keycode & CNTRL)
  264:                 kbd_put_keycode(CNTRL_CODE | KEY_RELEASE);
  265:             if (keycode & SHIFT)
  266:                 kbd_put_keycode(SHIFT_CODE | KEY_RELEASE);
  267:         } else {
  268:             keysym = curses2keysym[chr];
  269:             if (keysym == -1)
  270:                 keysym = chr;
  271: 
  272:             kbd_put_keysym(keysym);
  273:         }
  274:     }
  275: }
  276: 
  277: static void curses_cleanup(void *opaque) 
  278: {
  279:     endwin();
  280: }
  281: 
  282: static void curses_atexit(void)
  283: {
  284:     curses_cleanup(NULL);
  285: }
  286: 
  287: static void curses_setup(void)
  288: {
  289:     int i, colour_default[8] = {
  290:         COLOR_BLACK, COLOR_BLUE, COLOR_GREEN, COLOR_CYAN,
  291:         COLOR_RED, COLOR_MAGENTA, COLOR_YELLOW, COLOR_WHITE,
  292:     };
  293: 
  294:     /* input as raw as possible, let everything be interpreted
  295:      * by the guest system */
  296:     initscr(); noecho(); intrflush(stdscr, FALSE);
  297:     nodelay(stdscr, TRUE); nonl(); keypad(stdscr, TRUE);
  298:     start_color(); raw(); scrollok(stdscr, FALSE);
  299: 
  300:     for (i = 0; i < 64; i ++)
  301:         init_pair(i, colour_default[i & 7], colour_default[i >> 3]);
  302: }
  303: 
  304: static void curses_keyboard_setup(void)
  305: {
  306:     int i, keycode, keysym;
  307: 
  308: #if defined(__APPLE__)
  309:     /* always use generic keymaps */
  310:     if (!keyboard_layout)
  311:         keyboard_layout = "en-us";
  312: #endif
  313:     if(keyboard_layout) {
  314:         kbd_layout = init_keyboard_layout(keyboard_layout);
  315:         if (!kbd_layout)
  316:             exit(1);
  317:     }
  318: 
  319:     for (i = 0; i < CURSES_KEYS; i ++)
  320:         keycode2keysym[i] = -1;
  321: 
  322:     for (i = 0; i < CURSES_KEYS; i ++) {
  323:         if (curses2keycode[i] == -1)
  324:             continue;
  325: 
  326:         keycode = curses2keycode[i] & KEY_MASK;
  327:         if (keycode2keysym[keycode] >= 0)
  328:             continue;
  329: 
  330:         for (keysym = 0; keysym < CURSES_KEYS; keysym ++)
  331:             if (curses2keycode[keysym] == keycode) {
  332:                 keycode2keysym[keycode] = keysym;
  333:                 break;
  334:             }
  335: 
  336:         if (keysym >= CURSES_KEYS)
  337:             keycode2keysym[keycode] = i;
  338:     }
  339: }
  340: 
  341: void curses_display_init(DisplayState *ds, int full_screen)
  342: {
  343:     DisplayChangeListener *dcl;
  344: #ifndef _WIN32
  345:     if (!isatty(1)) {
  346:         fprintf(stderr, "We need a terminal output\n");
  347:         exit(1);
  348:     }
  349: #endif
  350: 
  351:     curses_setup();
  352:     curses_keyboard_setup();
  353:     atexit(curses_atexit);
  354: 
  355: #ifndef _WIN32
  356: #if defined(SIGWINCH) && defined(KEY_RESIZE)
  357:     /* some curses implementations provide a handler, but we
  358:      * want to be sure this is handled regardless of the library */
  359:     signal(SIGWINCH, curses_winch_handler);
  360: #endif
  361: #endif
  362: 
  363:     dcl = (DisplayChangeListener *) qemu_mallocz(sizeof(DisplayChangeListener));
  364:     dcl->dpy_update = curses_update;
  365:     dcl->dpy_resize = curses_resize;
  366:     dcl->dpy_refresh = curses_refresh;
  367:     dcl->dpy_text_cursor = curses_cursor_position;
  368:     register_displaychangelistener(ds, dcl);
  369:     qemu_free_displaysurface(ds->surface);
  370:     ds->surface = qemu_create_displaysurface_from(640, 400, 0, 0, (uint8_t*) screen);
  371: 
  372:     invalidate = 1;
  373: 
  374:     /* Standard VGA initial text mode dimensions */
  375:     curses_resize(ds);
  376: }

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