--- /dev/null
+/*
+ LICENSE INFORMATION:
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License (LGPL) as published by the Free Software Foundation.
+
+ Please refer to the COPYING file for more information.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+ Copyright © 2004 Bruno T. C. de Oliveira
+ Copyright © 2006 Pierre Habouzit
+ */
+
+#include <stdlib.h>
+#ifdef USE_PTY
+#include <pty.h>
+#endif
+#include <stdio.h>
+#include <string.h>
+
+#include "madtty.h"
+#include "roteprivate.h"
+
+#define ROTE_VT_UPDATE_ITERATIONS 5
+
+RoteTerm *rote_vt_create(int rows, int cols) {
+ RoteTerm *rt;
+ int i, j;
+
+ if (rows <= 0 || cols <= 0) return NULL;
+
+ if (! (rt = (RoteTerm*) malloc(sizeof(RoteTerm))) ) return NULL;
+ memset(rt, 0, sizeof(RoteTerm));
+
+ /* record dimensions */
+ rt->rows = rows;
+ rt->cols = cols;
+
+ /* default mode is replace */
+ rt->insert = false;
+
+ /* create the cell matrix */
+ rt->cells = (RoteCell**) malloc(sizeof(RoteCell*) * rt->rows);
+ for (i = 0; i < rt->rows; i++) {
+ /* create row */
+ rt->cells[i] = (RoteCell*) malloc(sizeof(RoteCell) * rt->cols);
+
+ /* fill row with spaces */
+ for (j = 0; j < rt->cols; j++) {
+ rt->cells[i][j].ch = 0x20; /* a space */
+ rt->cells[i][j].attr = 0x70; /* white text, black background */
+ }
+ }
+
+ /* allocate dirtiness array */
+ rt->line_dirty = (bool*) malloc(sizeof(bool) * rt->rows);
+
+ /* initialization of other public fields */
+ rt->crow = rt->ccol = 0;
+ rt->curattr = 0x70; /* white text over black background */
+
+ /* allocate private data */
+ rt->pd = (RoteTermPrivate*) malloc(sizeof(RoteTermPrivate));
+ memset(rt->pd, 0, sizeof(RoteTermPrivate));
+
+ rt->pd->pty = -1; /* no pty for now */
+
+ /* initial scrolling area is the whole window */
+ rt->pd->scrolltop = 0;
+ rt->pd->scrollbottom = rt->rows - 1;
+
+ #ifdef DEBUG
+ fprintf(stderr, "Created a %d x %d terminal.\n", rt->rows, rt->cols);
+ #endif
+
+ return rt;
+}
+
+void rote_vt_destroy(RoteTerm *rt) {
+ int i;
+ if (!rt) return;
+
+ free(rt->pd);
+ free(rt->line_dirty);
+ for (i = 0; i < rt->rows; i++) free(rt->cells[i]);
+ free(rt->cells);
+ free(rt);
+}
+
+#ifdef USE_NCURSES
+
+static void default_cur_set_attr(WINDOW *win, unsigned char attr) {
+ int cp = ROTE_ATTR_BG(attr) * 8 + 7 - ROTE_ATTR_FG(attr);
+ if (!cp) wattrset(win, A_NORMAL);
+ else wattrset(win, COLOR_PAIR(cp));
+
+ if (ROTE_ATTR_BOLD(attr)) wattron(win, A_BOLD);
+ if (ROTE_ATTR_BLINK(attr)) wattron(win, A_BLINK);
+}
+
+#endif
+
+static inline unsigned char ensure_printable(unsigned char ch)
+ { return ch >= 32 ? ch : 32; }
+
+#ifdef USE_NCURSES
+
+void rote_vt_draw(RoteTerm *rt, WINDOW *win, int srow, int scol,
+ void (*cur_set_attr)(WINDOW*,unsigned char)) {
+
+ int i, j;
+ rote_vt_update(rt);
+
+ if (!cur_set_attr) cur_set_attr = default_cur_set_attr;
+ for (i = 0; i < rt->rows; i++) {
+ wmove(win, srow + i, scol);
+ for (j = 0; j < rt->cols; j++) {
+ (*cur_set_attr)(win, rt->cells[i][j].attr);
+ waddch(win, ensure_printable(rt->cells[i][j].ch));
+ }
+ }
+
+ wmove(win, srow + rt->crow, scol + rt->ccol);
+}
+
+#endif
+
+#ifdef USE_PTY
+
+pid_t rote_vt_forkpty(RoteTerm *rt, const char *command) {
+ struct winsize ws;
+ pid_t childpid;
+
+ ws.ws_row = rt->rows;
+ ws.ws_col = rt->cols;
+ ws.ws_xpixel = ws.ws_ypixel = 0;
+
+ childpid = forkpty(&rt->pd->pty, NULL, NULL, &ws);
+ if (childpid < 0) return -1;
+
+ if (childpid == 0) {
+ /* we are the child, running under the slave side of the pty. */
+
+ /* Cajole application into using linux-console-compatible escape
+ * sequences (which is what we are prepared to interpret) */
+ setenv("TERM", "linux", 1);
+
+ /* Now we will exec /bin/sh -c command. */
+ execl("/bin/sh", "/bin/sh", "-c", command, NULL);
+
+ fprintf(stderr, "\nexecl() failed.\nCommand: '%s'\n", command);
+ exit(127); /* error exec'ing */
+ }
+
+ /* if we got here we are the parent process */
+ rt->childpid = childpid;
+ return childpid;
+}
+
+void rote_vt_forsake_child(RoteTerm *rt) {
+ if (rt->pd->pty >= 0) close(rt->pd->pty);
+ rt->pd->pty = -1;
+ rt->childpid = 0;
+}
+
+#endif
+
+void rote_vt_update(RoteTerm *rt) {
+ fd_set ifs;
+ struct timeval tvzero;
+ char buf[512];
+ int bytesread;
+ int n = ROTE_VT_UPDATE_ITERATIONS;
+ if (rt->pd->pty < 0) return; /* nothing to pump */
+
+ while (n--) { /* iterate at most ROVE_VT_UPDATE_ITERATIONS times.
+ * As Phil Endecott pointed out, if we don't restrict this,
+ * a program that floods the terminal with output
+ * could cause this loop to iterate forever, never
+ * being able to catch up. So we'll rely on the client
+ * calling rote_vt_update often, as the documentation
+ * recommends :-) */
+
+ /* check if pty has something to say */
+ FD_ZERO(&ifs); FD_SET(rt->pd->pty, &ifs);
+ tvzero.tv_sec = 0; tvzero.tv_usec = 0;
+
+ if (select(rt->pd->pty + 1, &ifs, NULL, NULL, &tvzero) <= 0)
+ return; /* nothing to read, or select() failed */
+
+ /* read what we can. This is guaranteed not to block, since
+ * select() told us there was something to read. */
+ bytesread = read(rt->pd->pty, buf, 512);
+ if (bytesread <= 0) return;
+
+ /* inject the data into the terminal */
+ rote_vt_inject(rt, buf, bytesread);
+ }
+}
+
+void rote_vt_write(RoteTerm *rt, const char *data, int len) {
+ if (rt->pd->pty < 0) {
+ /* no pty, so just inject the data plain and simple */
+ rote_vt_inject(rt, data, len);
+ return;
+ }
+
+ /* write data to pty. Keep calling write() until we have written
+ * everything. */
+ while (len > 0) {
+ int byteswritten = write(rt->pd->pty, data, len);
+ if (byteswritten < 0) {
+ /* very ugly way to inform the error. Improvements welcome! */
+ static char errormsg[] = "\n(ROTE: pty write() error)\n";
+ rote_vt_inject(rt, errormsg, strlen(errormsg));
+ return;
+ }
+
+ data += byteswritten;
+ len -= byteswritten;
+ }
+}
+
+void rote_vt_install_handler(RoteTerm *rt, rote_es_handler_t handler) {
+ rt->pd->handler = handler;
+}
+
+void *rote_vt_take_snapshot(RoteTerm *rt) {
+ int i;
+ int bytes_per_row = sizeof(RoteCell) * rt->cols;
+ void *buf = malloc(bytes_per_row * rt->rows);
+ void *ptr = buf;
+
+ for (i = 0; i < rt->rows; i++, ptr += bytes_per_row)
+ memcpy(ptr, rt->cells[i], bytes_per_row);
+
+ return buf;
+}
+
+void rote_vt_restore_snapshot(RoteTerm *rt, void *snapbuf) {
+ int i;
+ int bytes_per_row = sizeof(RoteCell) * rt->cols;
+
+ for (i = 0; i < rt->rows; i++, snapbuf += bytes_per_row) {
+ rt->line_dirty[i] = true;
+ memcpy(rt->cells[i], snapbuf, bytes_per_row);
+ }
+}
+
+int rote_vt_get_pty_fd(RoteTerm *rt) {
+ return rt->pd->pty;
+}
+
projects / apps / madtty.git / blobdiff