Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into staging
[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 #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 }