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[qemu.git] / curses.c
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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
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37#ifdef __OpenBSD__
38#define resize_term resizeterm
39#endif
40
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41#define FONT_HEIGHT 16
42#define FONT_WIDTH 8
43
44static console_ch_t screen[160 * 100];
45static WINDOW *screenpad = NULL;
46static int width, height, gwidth, gheight, invalidate;
47static int px, py, sminx, sminy, smaxx, smaxy;
48
49static 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
61static void curses_calc_pad(void)
62{
c21bbcfa 63 if (is_fixedsize_console()) {
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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
100static void curses_resize(DisplayState *ds, int w, int h)
101{
102 if (w == gwidth && h == gheight)
103 return;
104
105 gwidth = w;
106 gheight = h;
107
108 curses_calc_pad();
109}
110
111#ifndef _WIN32
b1314cf9 112#if defined(SIGWINCH) && defined(KEY_RESIZE)
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113static 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
136static 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#include "keymaps.c"
160
161static kbd_layout_t *kbd_layout = 0;
162static int keycode2keysym[CURSES_KEYS];
163
164static 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->width = FONT_WIDTH * width;
173 ds->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
b1314cf9 193#ifdef KEY_RESIZE
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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->width = FONT_WIDTH * width;
201 ds->height = FONT_HEIGHT * height;
202 continue;
203 }
b1314cf9 204#endif
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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
275static void curses_cleanup(void *opaque)
276{
277 endwin();
278}
279
280static void curses_atexit(void)
281{
282 curses_cleanup(NULL);
283}
284
285static 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
302static 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(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
339void curses_display_init(DisplayState *ds, int full_screen)
340{
341#ifndef _WIN32
342 if (!isatty(1)) {
343 fprintf(stderr, "We need a terminal output\n");
344 exit(1);
345 }
346#endif
347
348 curses_setup();
349 curses_keyboard_setup();
350 atexit(curses_atexit);
351
352#ifndef _WIN32
b1314cf9 353#if defined(SIGWINCH) && defined(KEY_RESIZE)
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354 /* some curses implementations provide a handler, but we
355 * want to be sure this is handled regardless of the library */
356 signal(SIGWINCH, curses_winch_handler);
357#endif
358#endif
359
360 ds->data = (void *) screen;
361 ds->linesize = 0;
362 ds->depth = 0;
363 ds->width = 640;
364 ds->height = 400;
365 ds->dpy_update = curses_update;
366 ds->dpy_resize = curses_resize;
367 ds->dpy_refresh = curses_refresh;
368 ds->dpy_text_cursor = curses_cursor_position;
369
370 invalidate = 1;
371
372 /* Standard VGA initial text mode dimensions */
373 curses_resize(ds, 80, 25);
374}