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
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) return NULL;
41 if (! (rt = (RoteTerm*) malloc(sizeof(RoteTerm))) ) return NULL;
42 memset(rt, 0, sizeof(RoteTerm));
44 /* record dimensions */
48 /* default mode is replace */
51 /* create the cell matrix */
52 rt->cells = (RoteCell**) malloc(sizeof(RoteCell*) * rt->rows);
53 for (i = 0; i < rt->rows; i++) {
55 rt->cells[i] = (RoteCell*) malloc(sizeof(RoteCell) * rt->cols);
57 /* fill row with spaces */
58 for (j = 0; j < rt->cols; j++) {
59 rt->cells[i][j].ch = 0x20; /* a space */
60 rt->cells[i][j].attr = 0x70; /* white text, black background */
64 /* allocate dirtiness array */
65 rt->line_dirty = (bool*) malloc(sizeof(bool) * rt->rows);
67 /* initialization of other public fields */
68 rt->crow = rt->ccol = 0;
69 rt->curattr = 0x70; /* white text over black background */
71 /* allocate private data */
72 rt->pd = (RoteTermPrivate*) malloc(sizeof(RoteTermPrivate));
73 memset(rt->pd, 0, sizeof(RoteTermPrivate));
75 rt->pd->pty = -1; /* no pty for now */
77 /* initial scrolling area is the whole window */
78 rt->pd->scrolltop = 0;
79 rt->pd->scrollbottom = rt->rows - 1;
82 fprintf(stderr, "Created a %d x %d terminal.\n", rt->rows, rt->cols);
88 void rote_vt_destroy(RoteTerm *rt)
95 for (i = 0; i < rt->rows; i++) free(rt->cells[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);
114 static inline unsigned char ensure_printable(unsigned char ch)
115 { return ch >= 32 ? ch : 32; }
119 void rote_vt_draw(RoteTerm *rt, WINDOW *win, int srow, int scol,
120 void (*cur_set_attr)(WINDOW*,unsigned char)) {
125 if (!cur_set_attr) cur_set_attr = default_cur_set_attr;
126 for (i = 0; i < rt->rows; i++) {
127 wmove(win, srow + i, scol);
128 for (j = 0; j < rt->cols; j++) {
129 (*cur_set_attr)(win, rt->cells[i][j].attr);
130 waddch(win, ensure_printable(rt->cells[i][j].ch));
134 wmove(win, srow + rt->crow, scol + rt->ccol);
141 pid_t rote_vt_forkpty(RoteTerm *rt, const char *command)
146 ws.ws_row = rt->rows;
147 ws.ws_col = rt->cols;
148 ws.ws_xpixel = ws.ws_ypixel = 0;
150 childpid = forkpty(&rt->pd->pty, NULL, NULL, &ws);
151 if (childpid < 0) return -1;
154 /* we are the child, running under the slave side of the pty. */
156 /* Cajole application into using linux-console-compatible escape
157 * sequences (which is what we are prepared to interpret) */
158 setenv("TERM", "linux", 1);
160 /* Now we will exec /bin/sh -c command. */
161 execl("/bin/sh", "/bin/sh", "-c", command, NULL);
163 fprintf(stderr, "\nexecl() failed.\nCommand: '%s'\n", command);
164 exit(127); /* error exec'ing */
167 /* if we got here we are the parent process */
168 rt->childpid = childpid;
172 void rote_vt_forsake_child(RoteTerm *rt)
174 if (rt->pd->pty >= 0) close(rt->pd->pty);
181 void rote_vt_update(RoteTerm *rt)
184 struct timeval tvzero;
187 int n = ROTE_VT_UPDATE_ITERATIONS;
188 if (rt->pd->pty < 0) return; /* nothing to pump */
190 while (n--) { /* iterate at most ROVE_VT_UPDATE_ITERATIONS times.
191 * As Phil Endecott pointed out, if we don't restrict this,
192 * a program that floods the terminal with output
193 * could cause this loop to iterate forever, never
194 * being able to catch up. So we'll rely on the client
195 * calling rote_vt_update often, as the documentation
198 /* check if pty has something to say */
199 FD_ZERO(&ifs); FD_SET(rt->pd->pty, &ifs);
200 tvzero.tv_sec = 0; tvzero.tv_usec = 0;
202 if (select(rt->pd->pty + 1, &ifs, NULL, NULL, &tvzero) <= 0)
203 return; /* nothing to read, or select() failed */
205 /* read what we can. This is guaranteed not to block, since
206 * select() told us there was something to read. */
207 bytesread = read(rt->pd->pty, buf, 512);
208 if (bytesread <= 0) return;
210 /* inject the data into the terminal */
211 rote_vt_inject(rt, buf, bytesread);
215 void rote_vt_write(RoteTerm *rt, const char *data, int len)
217 if (rt->pd->pty < 0) {
218 /* no pty, so just inject the data plain and simple */
219 rote_vt_inject(rt, data, len);
223 /* write data to pty. Keep calling write() until we have written
226 int byteswritten = write(rt->pd->pty, data, len);
227 if (byteswritten < 0) {
228 /* very ugly way to inform the error. Improvements welcome! */
229 static char errormsg[] = "\n(ROTE: pty write() error)\n";
230 rote_vt_inject(rt, errormsg, strlen(errormsg));
234 data += byteswritten;
239 void rote_vt_install_handler(RoteTerm *rt, rote_es_handler_t handler)
241 rt->pd->handler = handler;
244 void *rote_vt_take_snapshot(RoteTerm *rt)
247 int bytes_per_row = sizeof(RoteCell) * rt->cols;
248 void *buf = malloc(bytes_per_row * rt->rows);
251 for (i = 0; i < rt->rows; i++, ptr += bytes_per_row)
252 memcpy(ptr, rt->cells[i], bytes_per_row);
257 void rote_vt_restore_snapshot(RoteTerm *rt, void *snapbuf)
260 int bytes_per_row = sizeof(RoteCell) * rt->cols;
262 for (i = 0; i < rt->rows; i++, snapbuf += bytes_per_row) {
263 rt->line_dirty[i] = true;
264 memcpy(rt->cells[i], snapbuf, bytes_per_row);
268 int rote_vt_get_pty_fd(RoteTerm *rt)
273 static const char *keytable[KEY_MAX+1];
274 static int initialized = 0;
276 static void keytable_init();
278 void rote_vt_keypress(RoteTerm *rt, int keycode)
280 char c = (char) keycode;
282 if (!initialized) keytable_init();
284 if (keycode >= 0 && keycode < KEY_MAX && keytable[keycode])
285 rote_vt_write(rt, keytable[keycode], strlen(keytable[keycode]));
287 rote_vt_write(rt, &c, 1); /* not special, just write it */
290 static void keytable_init()
293 memset(keytable, 0, KEY_MAX+1 * sizeof(const char*));
295 keytable['\n'] = "\r";
296 keytable[KEY_UP] = "\e[A";
297 keytable[KEY_DOWN] = "\e[B";
298 keytable[KEY_RIGHT] = "\e[C";
299 keytable[KEY_LEFT] = "\e[D";
300 keytable[KEY_BACKSPACE] = "\b";
301 keytable[KEY_HOME] = "\e[1~";
302 keytable[KEY_IC] = "\e[2~";
303 keytable[KEY_DC] = "\e[3~";
304 keytable[KEY_END] = "\e[4~";
305 keytable[KEY_PPAGE] = "\e[5~";
306 keytable[KEY_NPAGE] = "\e[6~";
307 keytable[KEY_SUSPEND] = "\x1A"; /* Ctrl+Z gets mapped to this */
308 keytable[KEY_F(1)] = "\e[[A";
309 keytable[KEY_F(2)] = "\e[[B";
310 keytable[KEY_F(3)] = "\e[[C";
311 keytable[KEY_F(4)] = "\e[[D";
312 keytable[KEY_F(5)] = "\e[[E";
313 keytable[KEY_F(6)] = "\e[17~";
314 keytable[KEY_F(7)] = "\e[18~";
315 keytable[KEY_F(8)] = "\e[19~";
316 keytable[KEY_F(9)] = "\e[20~";
317 keytable[KEY_F(10)] = "\e[21~";