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 #include "qemu-common.h"
  32 #include "ui/console.h"
  33 #include "ui/input.h"
  34 #include "sysemu/sysemu.h"
  35
  36 #define FONT_HEIGHT 16
  37 #define FONT_WIDTH 8
  38
  39 static DisplayChangeListener *dcl;
  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(DisplayChangeListener *dcl,
  46                           int x, int y, int w, int h)
  47 {
  48     chtype *line;
  49
  50     line = ((chtype *) screen) + y * width;
  51     for (h += y; y < h; y ++, line += width)
  52         mvwaddchnstr(screenpad, y, 0, line, width);
  53
  54     pnoutrefresh(screenpad, py, px, sminy, sminx, smaxy - 1, smaxx - 1);
  55     refresh();
  56 }
  57
  58 static void curses_calc_pad(void)
  59 {
  60     if (qemu_console_is_fixedsize(NULL)) {
  61         width = gwidth;
  62         height = gheight;
  63     } else {
  64         width = COLS;
  65         height = LINES;
  66     }
  67
  68     if (screenpad)
  69         delwin(screenpad);
  70
  71     clear();
  72     refresh();
  73
  74     screenpad = newpad(height, width);
  75
  76     if (width > COLS) {
  77         px = (width - COLS) / 2;
  78         sminx = 0;
  79         smaxx = COLS;
  80     } else {
  81         px = 0;
  82         sminx = (COLS - width) / 2;
  83         smaxx = sminx + width;
  84     }
  85
  86     if (height > LINES) {
  87         py = (height - LINES) / 2;
  88         sminy = 0;
  89         smaxy = LINES;
  90     } else {
  91         py = 0;
  92         sminy = (LINES - height) / 2;
  93         smaxy = sminy + height;
  94     }
  95 }
  96
  97 static void curses_resize(DisplayChangeListener *dcl,
  98                           int width, int height)
  99 {
 100     if (width == gwidth && height == gheight) {
 101         return;
 102     }
 103
 104     gwidth = width;
 105     gheight = height;
 106
 107     curses_calc_pad();
 108 }
 109
 110 #if !defined(_WIN32) && defined(SIGWINCH) && defined(KEY_RESIZE)
 111 static volatile sig_atomic_t got_sigwinch;
 112 static void curses_winch_check(void)
 113 {
 114     struct winsize {
 115         unsigned short ws_row;
 116         unsigned short ws_col;
 117         unsigned short ws_xpixel;   /* unused */
 118         unsigned short ws_ypixel;   /* unused */
 119     } ws;
 120
 121     if (!got_sigwinch) {
 122         return;
 123     }
 124     got_sigwinch = false;
 125
 126     if (ioctl(1, TIOCGWINSZ, &ws) == -1) {
 127         return;
 128     }
 129
 130     resize_term(ws.ws_row, ws.ws_col);
 131     invalidate = 1;
 132 }
 133
 134 static void curses_winch_handler(int signum)
 135 {
 136     got_sigwinch = true;
 137 }
 138
 139 static void curses_winch_init(void)
 140 {
 141     struct sigaction old, winch = {
 142         .sa_handler  = curses_winch_handler,
 143     };
 144     sigaction(SIGWINCH, &winch, &old);
 145 }
 146 #else
 147 static void curses_winch_check(void) {}
 148 static void curses_winch_init(void) {}
 149 #endif
 150
 151 static void curses_cursor_position(DisplayChangeListener *dcl,
 152                                    int x, int y)
 153 {
 154     if (x >= 0) {
 155         x = sminx + x - px;
 156         y = sminy + y - py;
 157
 158         if (x >= 0 && y >= 0 && x < COLS && y < LINES) {
 159             move(y, x);
 160             curs_set(1);
 161             /* it seems that curs_set(1) must always be called before
 162              * curs_set(2) for the latter to have effect */
 163             if (!qemu_console_is_graphic(NULL)) {
 164                 curs_set(2);
 165             }
 166             return;
 167         }
 168     }
 169
 170     curs_set(0);
 171 }
 172
 173 /* generic keyboard conversion */
 174
 175 #include "curses_keys.h"
 176
 177 static kbd_layout_t *kbd_layout = NULL;
 178
 179 static void curses_refresh(DisplayChangeListener *dcl)
 180 {
 181     int chr, nextchr, keysym, keycode, keycode_alt;
 182
 183     curses_winch_check();
 184
 185     if (invalidate) {
 186         clear();
 187         refresh();
 188         curses_calc_pad();
 189         graphic_hw_invalidate(NULL);
 190         invalidate = 0;
 191     }
 192
 193     graphic_hw_text_update(NULL, screen);
 194
 195     nextchr = ERR;
 196     while (1) {
 197         /* while there are any pending key strokes to process */
 198         if (nextchr == ERR)
 199             chr = getch();
 200         else {
 201             chr = nextchr;
 202             nextchr = ERR;
 203         }
 204
 205         if (chr == ERR)
 206             break;
 207
 208 #ifdef KEY_RESIZE
 209         /* this shouldn't occur when we use a custom SIGWINCH handler */
 210         if (chr == KEY_RESIZE) {
 211             clear();
 212             refresh();
 213             curses_calc_pad();
 214             curses_update(dcl, 0, 0, width, height);
 215             continue;
 216         }
 217 #endif
 218
 219         keycode = curses2keycode[chr];
 220         keycode_alt = 0;
 221
 222         /* alt key */
 223         if (keycode == 1) {
 224             nextchr = getch();
 225
 226             if (nextchr != ERR) {
 227                 chr = nextchr;
 228                 keycode_alt = ALT;
 229                 keycode = curses2keycode[nextchr];
 230                 nextchr = ERR;
 231
 232                 if (keycode != -1) {
 233                     keycode |= ALT;
 234
 235                     /* process keys reserved for qemu */
 236                     if (keycode >= QEMU_KEY_CONSOLE0 &&
 237                             keycode < QEMU_KEY_CONSOLE0 + 9) {
 238                         erase();
 239                         wnoutrefresh(stdscr);
 240                         console_select(keycode - QEMU_KEY_CONSOLE0);
 241
 242                         invalidate = 1;
 243                         continue;
 244                     }
 245                 }
 246             }
 247         }
 248
 249         if (kbd_layout) {
 250             keysym = -1;
 251             if (chr < CURSES_KEYS)
 252                 keysym = curses2keysym[chr];
 253
 254             if (keysym == -1) {
 255                 if (chr < ' ') {
 256                     keysym = chr + '@';
 257                     if (keysym >= 'A' && keysym <= 'Z')
 258                         keysym += 'a' - 'A';
 259                     keysym |= KEYSYM_CNTRL;
 260                 } else
 261                     keysym = chr;
 262             }
 263
 264             keycode = keysym2scancode(kbd_layout, keysym & KEYSYM_MASK);
 265             if (keycode == 0)
 266                 continue;
 267
 268             keycode |= (keysym & ~KEYSYM_MASK) >> 16;
 269             keycode |= keycode_alt;
 270         }
 271
 272         if (keycode == -1)
 273             continue;
 274
 275         if (qemu_console_is_graphic(NULL)) {
 276             /* since terminals don't know about key press and release
 277              * events, we need to emit both for each key received */
 278             if (keycode & SHIFT) {
 279                 qemu_input_event_send_key_number(NULL, SHIFT_CODE, true);
 280             }
 281             if (keycode & CNTRL) {
 282                 qemu_input_event_send_key_number(NULL, CNTRL_CODE, true);
 283             }
 284             if (keycode & ALT) {
 285                 qemu_input_event_send_key_number(NULL, ALT_CODE, true);
 286             }
 287             if (keycode & ALTGR) {
 288                 qemu_input_event_send_key_number(NULL, GREY | ALT_CODE, true);
 289             }
 290
 291             qemu_input_event_send_key_number(NULL, keycode, true);
 292             qemu_input_event_send_key_number(NULL, keycode, false);
 293
 294             if (keycode & ALTGR) {
 295                 qemu_input_event_send_key_number(NULL, GREY | ALT_CODE, false);
 296             }
 297             if (keycode & ALT) {
 298                 qemu_input_event_send_key_number(NULL, ALT_CODE, false);
 299             }
 300             if (keycode & CNTRL) {
 301                 qemu_input_event_send_key_number(NULL, CNTRL_CODE, false);
 302             }
 303             if (keycode & SHIFT) {
 304                 qemu_input_event_send_key_number(NULL, SHIFT_CODE, false);
 305             }
 306         } else {
 307             keysym = curses2qemu[chr];
 308             if (keysym == -1)
 309                 keysym = chr;
 310
 311             kbd_put_keysym(keysym);
 312         }
 313     }
 314 }
 315
 316 static void curses_atexit(void)
 317 {
 318     endwin();
 319 }
 320
 321 static void curses_setup(void)
 322 {
 323     int i, colour_default[8] = {
 324         COLOR_BLACK, COLOR_BLUE, COLOR_GREEN, COLOR_CYAN,
 325         COLOR_RED, COLOR_MAGENTA, COLOR_YELLOW, COLOR_WHITE,
 326     };
 327
 328     /* input as raw as possible, let everything be interpreted
 329      * by the guest system */
 330     initscr(); noecho(); intrflush(stdscr, FALSE);
 331     nodelay(stdscr, TRUE); nonl(); keypad(stdscr, TRUE);
 332     start_color(); raw(); scrollok(stdscr, FALSE);
 333
 334     for (i = 0; i < 64; i ++)
 335         init_pair(i, colour_default[i & 7], colour_default[i >> 3]);
 336 }
 337
 338 static void curses_keyboard_setup(void)
 339 {
 340 #if defined(__APPLE__)
 341     /* always use generic keymaps */
 342     if (!keyboard_layout)
 343         keyboard_layout = "en-us";
 344 #endif
 345     if(keyboard_layout) {
 346         kbd_layout = init_keyboard_layout(name2keysym, keyboard_layout);
 347         if (!kbd_layout)
 348             exit(1);
 349     }
 350 }
 351
 352 static const DisplayChangeListenerOps dcl_ops = {
 353     .dpy_name        = "curses",
 354     .dpy_text_update = curses_update,
 355     .dpy_text_resize = curses_resize,
 356     .dpy_refresh     = curses_refresh,
 357     .dpy_text_cursor = curses_cursor_position,
 358 };
 359
 360 void curses_display_init(DisplayState *ds, int full_screen)
 361 {
 362 #ifndef _WIN32
 363     if (!isatty(1)) {
 364         fprintf(stderr, "We need a terminal output\n");
 365         exit(1);
 366     }
 367 #endif
 368
 369     curses_setup();
 370     curses_keyboard_setup();
 371     atexit(curses_atexit);
 372
 373     curses_winch_init();
 374
 375     dcl = (DisplayChangeListener *) g_malloc0(sizeof(DisplayChangeListener));
 376     dcl->ops = &dcl_ops;
 377     register_displaychangelistener(dcl);
 378
 379     invalidate = 1;
 380 }