+++ /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