keep the PID file locked for the lifetime of the process
[qemu.git] / 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 }