3 This program is free software; you can redistribute it and/or
4 modify it under the terms of the GNU Lesser General Public
5 License (LGPL) as published by the Free Software Foundation.
7 Please refer to the COPYING file for more information.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with this program; if not, write to the Free Software
16 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 Copyright © 2004 Bruno T. C. de Oliveira
19 Copyright © 2006 Pierre Habouzit
27 #include <sys/ioctl.h>
30 #include "roteprivate.h"
32 #define ROTE_VT_UPDATE_ITERATIONS 5
34 RoteTerm *rote_vt_create(int rows, int cols)
39 if (rows <= 0 || cols <= 0)
42 rt = (RoteTerm*)calloc(sizeof(RoteTerm), 1);
46 /* record dimensions */
50 /* default mode is replace */
53 /* create the cell matrix */
54 rt->cells = (RoteCell**) malloc(sizeof(RoteCell*) * rt->rows);
55 for (i = 0; i < rt->rows; i++) {
57 rt->cells[i] = (RoteCell*) malloc(sizeof(RoteCell) * rt->cols);
59 /* fill row with spaces */
60 for (j = 0; j < rt->cols; j++) {
61 rt->cells[i][j].ch = 0x20; /* a space */
62 rt->cells[i][j].attr = 0x70; /* white text, black background */
66 /* allocate dirtiness array */
67 rt->line_dirty = (bool*)calloc(sizeof(bool), rt->rows);
69 /* initialization of other public fields */
70 rt->crow = rt->ccol = 0;
71 rt->curattr = 0x70; /* white text over black background */
73 /* allocate private data */
74 rt->pd = (RoteTermPrivate*)calloc(sizeof(RoteTermPrivate), 1);
76 rt->pty = -1; /* no pty for now */
78 /* initial scrolling area is the whole window */
79 rt->pd->scrolltop = 0;
80 rt->pd->scrollbottom = rt->rows - 1;
85 void rote_vt_destroy(RoteTerm *rt)
93 for (i = 0; i < rt->rows; i++) {
102 static void default_cur_set_attr(WINDOW *win, unsigned char attr)
104 int cp = ROTE_ATTR_BG(attr) * 8 + 7 - ROTE_ATTR_FG(attr);
105 if (!cp) wattrset(win, A_NORMAL);
106 else wattrset(win, COLOR_PAIR(cp));
108 if (ROTE_ATTR_BOLD(attr)) wattron(win, A_BOLD);
109 if (ROTE_ATTR_BLINK(attr)) wattron(win, A_BLINK);
112 static inline unsigned char ensure_printable(unsigned char ch)
114 return ch >= 32 ? ch : 32;
117 void rote_vt_draw(RoteTerm *rt, WINDOW *win, int srow, int scol,
118 void (*cur_set_attr)(WINDOW*,unsigned char)) {
123 if (!cur_set_attr) cur_set_attr = default_cur_set_attr;
124 for (i = 0; i < rt->rows; i++) {
125 wmove(win, srow + i, scol);
126 for (j = 0; j < rt->cols; j++) {
127 (*cur_set_attr)(win, rt->cells[i][j].attr);
128 waddch(win, ensure_printable(rt->cells[i][j].ch));
132 wmove(win, srow + rt->crow, scol + rt->ccol);
137 /******************************************************/
139 #define PTYCHAR1 "pqrstuvwxyz"
140 #define PTYCHAR2 "0123456789abcdef"
142 /* allocate one pty/tty pair */
143 static int get_pty(char *tty_str)
146 char ptydev[] = "/dev/pty??";
147 char ttydev[] = "/dev/tty??";
148 int len = strlen(ttydev);
151 for (c1 = PTYCHAR1; *c1; c1++) {
152 ptydev[len-2] = ttydev[len-2] = *c1;
153 for (c2 = PTYCHAR2; *c2; c2++) {
154 ptydev[len-1] = ttydev[len-1] = *c2;
155 if ((fd = open(ptydev, O_RDWR)) >= 0) {
156 if (access(ttydev, R_OK|W_OK) == 0) {
157 strcpy(tty_str, ttydev);
168 run_process(const char *path, const char **argv, int *fd_ptr, int *pid_ptr)
170 int pty_fd, pid, i, nb_fds;
174 pty_fd = get_pty(tty_name);
178 fcntl(pty_fd, F_SETFL, O_NONBLOCK);
180 /* set dummy screen size */
183 ws.ws_xpixel = ws.ws_col;
184 ws.ws_ypixel = ws.ws_row;
185 ioctl(pty_fd, TIOCSWINSZ, &ws);
193 nb_fds = getdtablesize();
194 for (i = 0; i < nb_fds; i++)
196 /* open pseudo tty for standard i/o */
197 open(tty_name, O_RDWR);
203 setenv("TERM", "linux", 1);
204 execv(path, (char *const*)argv);
205 fprintf(stderr, "\nexecv() failed.\nCommand: '%s'\n", argv[0]);
208 /* return file info */
214 pid_t rote_vt_forkpty(RoteTerm *rt, const char *path, const char *argv[])
218 ws.ws_row = rt->rows;
219 ws.ws_col = rt->cols;
220 ws.ws_xpixel = ws.ws_ypixel = 0;
222 if (run_process(path, argv, &rt->pty, &rt->childpid)) {
226 ioctl(rt->pty, TIOCSWINSZ, &ws);
230 void rote_vt_forsake_child(RoteTerm *rt)
238 void rote_vt_update(RoteTerm *rt)
242 int n = ROTE_VT_UPDATE_ITERATIONS;
244 while (n--) { /* iterate at most ROVE_VT_UPDATE_ITERATIONS times.
245 * As Phil Endecott pointed out, if we don't restrict this,
246 * a program that floods the terminal with output
247 * could cause this loop to iterate forever, never
248 * being able to catch up. So we'll rely on the client
249 * calling rote_vt_update often, as the documentation
252 nbread = rote_vt_read(rt, buf, sizeof(buf));
256 /* inject the data into the terminal */
257 rote_vt_inject(rt, buf, nbread);
261 int rote_vt_read(RoteTerm *rt, char *buf, int buflen)
268 return read(rt->pty, buf, buflen);
271 void rote_vt_write(RoteTerm *rt, const char *data, int len)
274 /* no pty, so just inject the data plain and simple */
275 rote_vt_inject(rt, data, len);
279 /* write data to pty. Keep calling write() until we have written
282 int byteswritten = write(rt->pty, data, len);
283 if (byteswritten < 0) {
284 /* very ugly way to inform the error. Improvements welcome! */
285 static char errormsg[] = "\n(ROTE: pty write() error)\n";
286 rote_vt_inject(rt, errormsg, strlen(errormsg));
290 data += byteswritten;
295 void *rote_vt_take_snapshot(RoteTerm *rt)
297 const int bytes_per_row = sizeof(RoteCell) * rt->cols;
298 void *buf = malloc(bytes_per_row * rt->rows);
302 for (i = 0; i < rt->rows; i++, ptr += bytes_per_row)
303 memcpy(ptr, rt->cells[i], bytes_per_row);
308 void rote_vt_restore_snapshot(RoteTerm *rt, void *snapbuf)
310 const int bytes_per_row = sizeof(RoteCell) * rt->cols;
314 for (i = 0; i < rt->rows; i++, snapbuf += bytes_per_row) {
315 rt->line_dirty[i] = true;
316 memcpy(rt->cells[i], snapbuf, bytes_per_row);
320 static const char *keytable[KEY_MAX+1];
322 static void keytable_init()
324 memset(keytable, 0, KEY_MAX+1 * sizeof(const char*));
326 keytable['\n'] = "\r";
327 keytable[KEY_UP] = "\e[A";
328 keytable[KEY_DOWN] = "\e[B";
329 keytable[KEY_RIGHT] = "\e[C";
330 keytable[KEY_LEFT] = "\e[D";
331 keytable[KEY_BACKSPACE] = "\b";
332 keytable[KEY_HOME] = "\e[1~";
333 keytable[KEY_IC] = "\e[2~";
334 keytable[KEY_DC] = "\e[3~";
335 keytable[KEY_END] = "\e[4~";
336 keytable[KEY_PPAGE] = "\e[5~";
337 keytable[KEY_NPAGE] = "\e[6~";
338 keytable[KEY_SUSPEND] = "\x1A"; /* Ctrl+Z gets mapped to this */
339 keytable[KEY_F(1)] = "\e[[A";
340 keytable[KEY_F(2)] = "\e[[B";
341 keytable[KEY_F(3)] = "\e[[C";
342 keytable[KEY_F(4)] = "\e[[D";
343 keytable[KEY_F(5)] = "\e[[E";
344 keytable[KEY_F(6)] = "\e[17~";
345 keytable[KEY_F(7)] = "\e[18~";
346 keytable[KEY_F(8)] = "\e[19~";
347 keytable[KEY_F(9)] = "\e[20~";
348 keytable[KEY_F(10)] = "\e[21~";
351 void rote_vt_keypress(RoteTerm *rt, int keycode)
353 char c = (char) keycode;
355 if (keytable['\n'] == NULL)
358 if (keycode >= 0 && keycode < KEY_MAX && keytable[keycode]) {
359 rote_vt_write(rt, keytable[keycode], strlen(keytable[keycode]));
361 rote_vt_write(rt, &c, 1); /* not special, just write it */