Terminal emulator with all the bells and whistles https://www.enlightenment.org
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#include "private.h"
#include <Elementary.h>
#include "termpty.h"
#include "termptyesc.h"
#include "termptyops.h"
#include "termptysave.h"
#include "termio.h"
#include <sys/types.h>
#include <signal.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <termios.h>
#if defined (__sun) || defined (__sun__)
# include <stropts.h>
#endif
#include <assert.h>
/* specific log domain to help debug only terminal code parser */
int _termpty_log_dom = -1;
#undef CRITICAL
#undef ERR
#undef WRN
#undef INF
#undef DBG
#define CRITICAL(...) EINA_LOG_DOM_CRIT(_termpty_log_dom, __VA_ARGS__)
#define ERR(...) EINA_LOG_DOM_ERR(_termpty_log_dom, __VA_ARGS__)
#define WRN(...) EINA_LOG_DOM_WARN(_termpty_log_dom, __VA_ARGS__)
#define INF(...) EINA_LOG_DOM_INFO(_termpty_log_dom, __VA_ARGS__)
#define DBG(...) EINA_LOG_DOM_DBG(_termpty_log_dom, __VA_ARGS__)
void
termpty_init(void)
{
if (_termpty_log_dom >= 0) return;
_termpty_log_dom = eina_log_domain_register("termpty", NULL);
if (_termpty_log_dom < 0)
EINA_LOG_CRIT("Could not create logging domain '%s'.", "termpty");
}
void
termpty_shutdown(void)
{
if (_termpty_log_dom < 0) return;
eina_log_domain_unregister(_termpty_log_dom);
_termpty_log_dom = -1;
}
void
termpty_handle_buf(Termpty *ty, const Eina_Unicode *codepoints, int len)
{
Eina_Unicode *c, *ce, *b;
int n, bytes;
c = (Eina_Unicode *)codepoints;
ce = &(c[len]);
if (ty->buf)
{
bytes = (ty->buflen + len + 1) * sizeof(int);
b = realloc(ty->buf, bytes);
if (!b)
{
ERR(_("memerr: %s"), strerror(errno));
return;
}
DBG("realloc add %i + %i", (int)(ty->buflen * sizeof(int)), (int)(len * sizeof(int)));
bytes = len * sizeof(Eina_Unicode);
memcpy(&(b[ty->buflen]), codepoints, bytes);
ty->buf = b;
ty->buflen += len;
ty->buf[ty->buflen] = 0;
c = ty->buf;
ce = c + ty->buflen;
while (c < ce)
{
n = termpty_handle_seq(ty, c, ce);
if (n == 0)
{
Eina_Unicode *tmp = ty->buf;
ty->buf = NULL;
ty->buflen = 0;
bytes = ((char *)ce - (char *)c) + sizeof(Eina_Unicode);
DBG("malloc till %i", (int)(bytes - sizeof(Eina_Unicode)));
ty->buf = malloc(bytes);
if (!ty->buf)
{
ERR(_("memerr: %s"), strerror(errno));
return;
}
bytes = (char *)ce - (char *)c;
memcpy(ty->buf, c, bytes);
ty->buflen = bytes / sizeof(Eina_Unicode);
ty->buf[ty->buflen] = 0;
free(tmp);
break;
}
c += n;
}
if (c == ce)
{
if (ty->buf)
{
free(ty->buf);
ty->buf = NULL;
}
ty->buflen = 0;
}
}
else
{
while (c < ce)
{
n = termpty_handle_seq(ty, c, ce);
if (n == 0)
{
bytes = ((char *)ce - (char *)c) + sizeof(Eina_Unicode);
ty->buf = malloc(bytes);
DBG("malloc %i", (int)(bytes - sizeof(Eina_Unicode)));
if (!ty->buf)
{
ERR(_("memerr: %s"), strerror(errno));
}
else
{
bytes = (char *)ce - (char *)c;
memcpy(ty->buf, c, bytes);
ty->buflen = bytes / sizeof(Eina_Unicode);
ty->buf[ty->buflen] = 0;
}
break;
}
c += n;
}
}
}
static void
_pty_size(Termpty *ty)
{
struct winsize sz;
sz.ws_col = ty->w;
sz.ws_row = ty->h;
sz.ws_xpixel = 0;
sz.ws_ypixel = 0;
if (ioctl(ty->fd, TIOCSWINSZ, &sz) < 0)
ERR(_("Size set ioctl failed: %s"), strerror(errno));
}
static Eina_Bool
_cb_exe_exit(void *data, int type EINA_UNUSED, void *event)
{
Ecore_Exe_Event_Del *ev = event;
Termpty *ty = data;
if (ev->pid != ty->pid) return ECORE_CALLBACK_PASS_ON;
ty->exit_code = ev->exit_code;
ty->pid = -1;
if (ty->hand_exe_exit) ecore_event_handler_del(ty->hand_exe_exit);
ty->hand_exe_exit = NULL;
if (ty->hand_fd) ecore_main_fd_handler_del(ty->hand_fd);
ty->hand_fd = NULL;
if (ty->fd >= 0) close(ty->fd);
ty->fd = -1;
if (ty->slavefd >= 0) close(ty->slavefd);
ty->slavefd = -1;
if (ty->cb.exited.func) ty->cb.exited.func(ty->cb.exited.data);
return ECORE_CALLBACK_PASS_ON;
}
static Eina_Bool
_cb_fd_read(void *data, Ecore_Fd_Handler *fd_handler)
{
Termpty *ty = data;
char buf[4097];
Eina_Unicode codepoint[4097];
int len, i, j, k, reads;
if (ecore_main_fd_handler_active_get(fd_handler, ECORE_FD_ERROR))
{
ERR("error while reading from tty slave fd");
return ECORE_CALLBACK_CANCEL;
}
// read up to 64 * 4096 bytes
for (reads = 0; reads < 64; reads++)
{
char *rbuf = buf;
len = sizeof(buf) - 1;
for (i = 0; i < (int)sizeof(ty->oldbuf) && ty->oldbuf[i] & 0x80; i++)
{
*rbuf = ty->oldbuf[i];
rbuf++;
len--;
}
len = read(ty->fd, rbuf, len);
if (len < 0 && errno != EAGAIN)
{
ERR("error while reading from tty slave fd");
break;
}
if (len <= 0) break;
for (i = 0; i < (int)sizeof(ty->oldbuf); i++)
ty->oldbuf[i] = 0;
len += rbuf - buf;
/*
printf(" I: ");
int jj;
for (jj = 0; jj < len; jj++)
{
if ((buf[jj] < ' ') || (buf[jj] >= 0x7f))
printf("\033[33m%02x\033[0m", (unsigned char)buf[jj]);
else
printf("%c", buf[jj]);
}
printf("\n");
*/
buf[len] = 0;
// convert UTF8 to codepoint integers
j = 0;
for (i = 0; i < len;)
{
int g = 0, prev_i = i;
if (buf[i])
{
#if (EINA_VERSION_MAJOR > 1) || (EINA_VERSION_MINOR >= 8)
g = eina_unicode_utf8_next_get(buf, &i);
if ((0xdc80 <= g) && (g <= 0xdcff) &&
(len - prev_i) <= (int)sizeof(ty->oldbuf))
#else
i = evas_string_char_next_get(buf, i, &g);
if (i < 0 &&
(len - prev_i) <= (int)sizeof(ty->oldbuf))
#endif
{
for (k = 0;
(k < (int)sizeof(ty->oldbuf)) &&
(k < (len - prev_i));
k++)
{
ty->oldbuf[k] = buf[prev_i+k];
}
DBG("failure at %d/%d/%d", prev_i, i, len);
break;
}
}
else
{
g = 0;
i++;
}
codepoint[j] = g;
j++;
}
codepoint[j] = 0;
// DBG("---------------- handle buf %i", j);
termpty_handle_buf(ty, codepoint, j);
}
if (ty->cb.change.func) ty->cb.change.func(ty->cb.change.data);
#ifdef ENABLE_FUZZING
if (len <= 0)
{
ty->exit_code = 0;
ty->pid = -1;
if (ty->hand_exe_exit) ecore_event_handler_del(ty->hand_exe_exit);
ty->hand_exe_exit = NULL;
if (ty->hand_fd) ecore_main_fd_handler_del(ty->hand_fd);
ty->hand_fd = NULL;
ty->fd = -1;
ty->slavefd = -1;
if (ty->cb.exited.func)
ty->cb.exited.func(ty->cb.exited.data);
return ECORE_CALLBACK_CANCEL;
}
#endif
return EINA_TRUE;
}
static void
_limit_coord(Termpty *ty)
{
TERMPTY_RESTRICT_FIELD(ty->termstate.had_cr_x, 0, ty->w);
TERMPTY_RESTRICT_FIELD(ty->termstate.had_cr_y, 0, ty->h);
TERMPTY_RESTRICT_FIELD(ty->cursor_state.cx, 0, ty->w);
TERMPTY_RESTRICT_FIELD(ty->cursor_state.cy, 0, ty->h);
TERMPTY_RESTRICT_FIELD(ty->cursor_save.cx, 0, ty->w);
TERMPTY_RESTRICT_FIELD(ty->cursor_save.cy, 0, ty->h);
}
Termpty *
termpty_new(const char *cmd, Eina_Bool login_shell, const char *cd,
int w, int h, int backscroll, Eina_Bool xterm_256color,
Eina_Bool erase_is_del, const char *emotion_mod)
{
Termpty *ty;
const char *pty;
int mode;
struct termios t;
Eina_Bool needs_shell;
const char *shell = NULL;
const char *args[4] = {NULL, NULL, NULL, NULL};
const char *arg0;
ty = calloc(1, sizeof(Termpty));
if (!ty) return NULL;
ty->w = w;
ty->h = h;
ty->backsize = backscroll;
termpty_reset_state(ty);
ty->screen = calloc(1, sizeof(Termcell) * ty->w * ty->h);
if (!ty->screen)
{
ERR("Allocation of term %s %ix%i failed: %s",
"screen", ty->w, ty->h, strerror(errno));
goto err;
}
ty->screen2 = calloc(1, sizeof(Termcell) * ty->w * ty->h);
if (!ty->screen2)
{
ERR("Allocation of term %s %ix%i failed: %s",
"screen2", ty->w, ty->h, strerror(errno));
goto err;
}
ty->circular_offset = 0;
#ifdef ENABLE_FUZZING
ty->fd = STDIN_FILENO;
ty->hand_fd = ecore_main_fd_handler_add(ty->fd,
ECORE_FD_READ | ECORE_FD_ERROR,
_cb_fd_read, ty,
NULL, NULL);
_pty_size(ty);
termpty_save_register(ty);
return ty;
#endif
needs_shell = ((!cmd) ||
(strpbrk(cmd, " |&;<>()$`\\\"'*?#") != NULL));
DBG("cmd='%s' needs_shell=%u", cmd ? cmd : "", needs_shell);
if (needs_shell)
{
shell = getenv("SHELL");
if (!shell)
{
uid_t uid = getuid();
struct passwd *pw = getpwuid(uid);
if (pw) shell = pw->pw_shell;
}
if (!shell)
{
WRN(_("Could not find shell, falling back to %s"), "/bin/sh");
shell = "/bin/sh";
}
}
if (!needs_shell)
args[0] = cmd;
else
{
args[0] = shell;
if (cmd)
{
args[1] = "-c";
args[2] = cmd;
}
}
arg0 = strrchr(args[0], '/');
if (!arg0) arg0 = args[0];
else arg0++;
ty->prop.title = eina_stringshare_add(arg0);
ty->fd = posix_openpt(O_RDWR | O_NOCTTY);
if (ty->fd < 0)
{
ERR(_("Function %s failed: %s"), "posix_openpt()", strerror(errno));
goto err;
}
if (grantpt(ty->fd) != 0)
{
WRN(_("Function %s failed: %s"), "grantpt()", strerror(errno));
}
if (unlockpt(ty->fd) != 0)
{
ERR(_("Function %s failed: %s"), "unlockpt()", strerror(errno));
goto err;
}
pty = ptsname(ty->fd);
ty->slavefd = open(pty, O_RDWR | O_NOCTTY);
if (ty->slavefd < 0)
{
ERR(_("open() of pty '%s' failed: %s"), pty, strerror(errno));
goto err;
}
mode = fcntl(ty->fd, F_GETFL, 0);
if (mode < 0)
{
ERR(_("fcntl() on pty '%s' failed: %s"), pty, strerror(errno));
goto err;
}
if (!(mode & O_NDELAY))
if (fcntl(ty->fd, F_SETFL, mode | O_NDELAY))
{
ERR(_("fcntl() on pty '%s' failed: %s"), pty, strerror(errno));
goto err;
}
#if defined (__sun) || defined (__sun__)
if (ioctl(ty->slavefd, I_PUSH, "ptem") < 0
|| ioctl(ty->slavefd, I_PUSH, "ldterm") < 0
|| ioctl(ty->slavefd, I_PUSH, "ttcompat") < 0)
{
ERR(_("ioctl() on pty '%s' failed: %s"), pty, strerror(errno));
goto err;
}
# endif
if (tcgetattr(ty->slavefd, &t) < 0)
{
ERR("unable to tcgetattr: %s", strerror(errno));
goto err;
}
t.c_cc[VERASE] = (erase_is_del) ? 0x7f : 0x8;
#ifdef IUTF8
t.c_iflag |= IUTF8;
#endif
if (tcsetattr(ty->slavefd, TCSANOW, &t) < 0)
{
ERR("unable to tcsetattr: %s", strerror(errno));
goto err;
}
ty->hand_exe_exit = ecore_event_handler_add(ECORE_EXE_EVENT_DEL,
_cb_exe_exit, ty);
if (!ty->hand_exe_exit)
{
ERR("event handler add failed");
goto err;
}
ty->pid = fork();
if (ty->pid < 0)
{
ERR("unable to fork: %s", strerror(errno));
goto err;
}
if (!ty->pid)
{
int i;
char buf[256];
if (cd)
{
if (chdir(cd) != 0)
{
ERR(_("Could not change current directory to '%s': %s"),
cd, strerror(errno));
exit(127);
}
}
#define NC(x) (args[x] != NULL ? args[x] : "")
DBG("exec %s %s %s %s", NC(0), NC(1), NC(2), NC(3));
#undef NC
for (i = 0; i < 100; i++)
{
if (i != ty->slavefd) close(i);
}
setsid();
dup2(ty->slavefd, 0);
dup2(ty->slavefd, 1);
dup2(ty->slavefd, 2);
if (ioctl(ty->slavefd, TIOCSCTTY, NULL) < 0) exit(1);
close(ty->fd);
close(ty->slavefd);
/* TODO: should we reset signals here? */
/* pretend to be xterm */
if (xterm_256color)
{
putenv("TERM=xterm-256color");
}
else
{
putenv("TERM=xterm");
}
putenv("XTERM_256_COLORS=1");
if (emotion_mod)
{
snprintf(buf, sizeof(buf), "EMOTION_ENGINE=%s", emotion_mod);
putenv(buf);
}
if (!login_shell)
execvp(args[0], (char *const *)args);
else
{
char *cmdfile, *cmd0;
cmdfile = (char *)args[0];
cmd0 = alloca(strlen(cmdfile) + 2);
cmd0[0] = '-';
strcpy(cmd0 + 1, cmdfile);
args[0] = cmd0;
execvp(cmdfile, (char *const *)args);
}
exit(127); /* same as system() for failed commands */
}
ty->hand_fd = ecore_main_fd_handler_add(ty->fd, ECORE_FD_READ,
_cb_fd_read, ty,
NULL, NULL);
close(ty->slavefd);
ty->slavefd = -1;
_pty_size(ty);
termpty_save_register(ty);
return ty;
err:
free(ty->screen);
free(ty->screen2);
if (ty->fd >= 0) close(ty->fd);
if (ty->slavefd >= 0) close(ty->slavefd);
free(ty);
return NULL;
}
void
termpty_free(Termpty *ty)
{
Termexp *ex;
termpty_save_unregister(ty);
EINA_LIST_FREE(ty->block.expecting, ex) free(ex);
if (ty->block.blocks) eina_hash_free(ty->block.blocks);
if (ty->block.chid_map) eina_hash_free(ty->block.chid_map);
if (ty->block.active) eina_list_free(ty->block.active);
if (ty->fd >= 0) close(ty->fd);
if (ty->slavefd >= 0) close(ty->slavefd);
if (ty->pid >= 0)
{
int i;
// in case someone stopped the child - cont it
kill(ty->pid, SIGCONT);
// sighup the shell
kill(ty->pid, SIGHUP);
// try 400 time (sleeping for 1ms) to check for death of child
for (i = 0; i < 400; i++)
{
int status = 0;
// poll exit of child pid
if (waitpid(ty->pid, &status, WNOHANG) == ty->pid)
{
// if child exited - break loop and mark pid as done
ty->pid = -1;
break;
}
// after 100ms set sigint
if (i == 100) kill(ty->pid, SIGINT);
// after 200ms send term signal
else if (i == 200) kill(ty->pid, SIGTERM);
// after 300ms send quit signal
else if (i == 300) kill(ty->pid, SIGQUIT);
usleep(1000); // sleep 1ms
}
// so 400ms and child not gone - KILL!
if (ty->pid >= 0)
{
kill(ty->pid, SIGKILL);
ty->pid = -1;
}
}
if (ty->hand_exe_exit) ecore_event_handler_del(ty->hand_exe_exit);
if (ty->hand_fd) ecore_main_fd_handler_del(ty->hand_fd);
if (ty->prop.title) eina_stringshare_del(ty->prop.title);
if (ty->prop.user_title) eina_stringshare_del(ty->prop.user_title);
if (ty->prop.icon) eina_stringshare_del(ty->prop.icon);
if (ty->back)
{
size_t i;
for (i = 0; i < ty->backsize; i++)
termpty_save_free(&ty->back[i]);
free(ty->back);
}
free(ty->screen);
free(ty->screen2);
free(ty->buf);
free(ty);
}
static Eina_Bool
_termpty_cell_is_empty(const Termcell *cell)
{
if ((cell->codepoint != 0) &&
(!cell->att.invisible) &&
(cell->att.fg != COL_INVIS))
{
return EINA_FALSE;
}
return EINA_TRUE;
}
static Eina_Bool
_termpty_line_is_empty(const Termcell *cells, ssize_t nb_cells)
{
ssize_t len;
for (len = nb_cells - 1; len >= 0; len--)
{
const Termcell *cell = cells + len;
if (!_termpty_cell_is_empty(cell))
return EINA_FALSE;
}
return EINA_TRUE;
}
ssize_t
termpty_line_length(const Termcell *cells, ssize_t nb_cells)
{
ssize_t len = nb_cells;
if (!cells)
return 0;
for (len = nb_cells - 1; len >= 0; len--)
{
const Termcell *cell = cells + len;
if (!_termpty_cell_is_empty(cell))
return len + 1;
}
return 0;
}
#define BACKLOG_ROW_GET(Ty, Y) \
(&Ty->back[(Ty->backsize + ty->backpos - ((Y) - 1 )) % Ty->backsize])
#if 0
static void
verify_beacon(Termpty *ty)
{
Termsave *ts;
int nb_lines;
int backlog_y = ty->backlog_beacon.backlog_y;
int screen_y = ty->backlog_beacon.screen_y;
assert(ty->backlog_beacon.screen_y >= 0);
assert(ty->backlog_beacon.backlog_y >= 0);
assert(ty->backlog_beacon.screen_y >= ty->backlog_beacon.backlog_y);
//ERR("FROM screen_y:%d backlog_y:%d",
// screen_y, backlog_y);
while (backlog_y > 0)
{
ts = BACKLOG_ROW_GET(ty, backlog_y);
if (!ts->cells)
{
ERR("went too far: screen_y:%d backlog_y:%d",
screen_y, backlog_y);
return;
}
nb_lines = (ts->w == 0) ? 1 : (ts->w + ty->w - 1) / ty->w;
screen_y -= nb_lines;
backlog_y--;
//ERR("nb_lines:%d screen_y:%d backlog_y:%d ts->w:%d ty->w:%d",
// nb_lines, screen_y, backlog_y, ts->w, ty->w);
assert(screen_y >= backlog_y);
}
//ERR("TO screen_y:%d backlog_y:%d",
// screen_y, backlog_y);
assert (backlog_y == 0);
assert (screen_y == 0);
}
#endif
static void
_backlog_remove_latest_nolock(Termpty *ty)
{
Termsave *ts;
if (ty->backsize <= 0)
return;
ts = BACKLOG_ROW_GET(ty, 1);
if (ty->backpos == 0)
ty->backpos = ty->backsize - 1;
else
ty->backpos--;
/* reset beacon */
ty->backlog_beacon.screen_y = 0;
ty->backlog_beacon.backlog_y = 0;
termpty_save_free(ts);
}
void
termpty_text_save_top(Termpty *ty, Termcell *cells, ssize_t w_max)
{
Termsave *ts;
ssize_t w;
if (ty->backsize <= 0)
return;
assert(ty->back);
termpty_backlog_lock();
w = termpty_line_length(cells, w_max);
if (ty->backsize >= 1)
{
ts = BACKLOG_ROW_GET(ty, 1);
if (!ts->cells)
goto add_new_ts;
/* TODO: RESIZE uncompress ? */
if (ts->w && ts->cells[ts->w - 1].att.autowrapped)
{
int old_len = ts->w;
termpty_save_expand(ts, cells, w);
ty->backlog_beacon.screen_y += (ts->w + ty->w - 1) / ty->w
- (old_len + ty->w - 1) / ty->w;
return;
}
}
add_new_ts:
ts = BACKLOG_ROW_GET(ty, 0);
ts = termpty_save_new(ts, w);
if (!ts)
return;
termpty_cell_copy(ty, cells, ts->cells, w);
ty->backpos++;
if (ty->backpos >= ty->backsize)
ty->backpos = 0;
termpty_backlog_unlock();
ty->backlog_beacon.screen_y++;
ty->backlog_beacon.backlog_y++;
if (ty->backlog_beacon.backlog_y >= (int)ty->backsize)
{
ty->backlog_beacon.screen_y = 0;
ty->backlog_beacon.backlog_y = 0;
}
}
ssize_t
termpty_row_length(Termpty *ty, int y)
{
ssize_t wret;
Termcell *cells = termpty_cellrow_get(ty, y, &wret);
if (!cells)
return 0;
if (y >= 0)
return termpty_line_length(cells, ty->w);
return wret;
}
ssize_t
termpty_backlog_length(Termpty *ty)
{
int backlog_y = ty->backlog_beacon.backlog_y;
int screen_y = ty->backlog_beacon.screen_y;
if (!ty->backsize)
return 0;
while (42)
{
int nb_lines;
Termsave *ts;
ts = BACKLOG_ROW_GET(ty, backlog_y);
if (!ts->cells || backlog_y >= (int)ty->backsize)
return ty->backlog_beacon.screen_y;
nb_lines = (ts->w == 0) ? 1 : (ts->w + ty->w - 1) / ty->w;
ty->backlog_beacon.screen_y = screen_y;
ty->backlog_beacon.backlog_y = backlog_y;
screen_y += nb_lines;
backlog_y++;
}
}
void
termpty_backscroll_adjust(Termpty *ty, int *scroll)
{
int backlog_y = ty->backlog_beacon.backlog_y;
int screen_y = ty->backlog_beacon.screen_y;
if (!ty->backsize || *scroll <= 0)
{
*scroll = 0;
return;
}
if (*scroll < screen_y)
return;
while (42)
{
int nb_lines;
Termsave *ts;
ts = BACKLOG_ROW_GET(ty, backlog_y);
if (*scroll <= screen_y)
{
return;
}
if (!ts->cells || backlog_y >= (int)ty->backsize)
{
*scroll = ty->backlog_beacon.screen_y;
return;
}
nb_lines = (ts->w == 0) ? 1 : (ts->w + ty->w - 1) / ty->w;
ty->backlog_beacon.screen_y = screen_y;
ty->backlog_beacon.backlog_y = backlog_y;
screen_y += nb_lines;
backlog_y++;
}
}
static Termcell*
_termpty_cellrow_from_beacon_get(Termpty *ty, int requested_y, ssize_t *wret)
{
int backlog_y = ty->backlog_beacon.backlog_y;
int screen_y = ty->backlog_beacon.screen_y;
Eina_Bool going_forward = EINA_TRUE;
requested_y = -requested_y;
/* check if going from 0,0 is faster than using the beacon */
if (screen_y - requested_y > requested_y)
{
backlog_y = 1;
screen_y = 1;
}
while (42) {
Termsave *ts;
int nb_lines;
ts = BACKLOG_ROW_GET(ty, backlog_y);
if (!ts->cells)
return NULL;
nb_lines = (ts->w == 0) ? 1 : (ts->w + ty->w - 1) / ty->w;
if (!going_forward) {
screen_y -= nb_lines;
}
if ((screen_y <= requested_y) && (requested_y < screen_y + nb_lines))
{
int delta = screen_y + nb_lines - 1 - requested_y;
*wret = ts->w - delta * ty->w;
if (*wret > ts->w)
*wret = ts->w;
ty->backlog_beacon.screen_y = screen_y;
ty->backlog_beacon.backlog_y = backlog_y;
return &ts->cells[delta * ty->w];
}
if (requested_y > screen_y)
{
screen_y += nb_lines;
backlog_y++;
}
else
{
backlog_y--;
going_forward = EINA_FALSE;
}
}
return NULL;
}
Termcell *
termpty_cellrow_get(Termpty *ty, int y_requested, ssize_t *wret)
{
if (y_requested >= 0)
{
if (y_requested >= ty->h)
return NULL;
*wret = ty->w;
return &(TERMPTY_SCREEN(ty, 0, y_requested));
}
if (!ty->back)
return NULL;
return _termpty_cellrow_from_beacon_get(ty, y_requested, wret);
}
void
termpty_write(Termpty *ty, const char *input, int len)
{
int fd = ty->fd;
#ifdef ENABLE_FUZZING
fd = ty->fd_dev_null;
#endif
if (fd < 0) return;
if (write(fd, input, len) < 0)
ERR(_("Could not write to file descriptor %d: %s"),
fd, strerror(errno));
}
struct screen_info
{
Termcell *screen;
int w;
int h;
int x;
int y;
int cy;
int cx;
int circular_offset;
};
#define SCREEN_INFO_GET_CELLS(Tsi, X, Y) \
Tsi->screen[X + (((Y + Tsi->circular_offset) % Tsi->h) * Tsi->w)]
static void
_check_screen_info(Termpty *ty, struct screen_info *si)
{
if (si->y >= si->h)
{
Termcell *cells = &SCREEN_INFO_GET_CELLS(si, 0, 0);
si->y--;
termpty_text_save_top(ty, cells, si->w);
termpty_cells_clear(ty, cells, si->w);
si->circular_offset++;
if (si->circular_offset >= si->h)
si->circular_offset = 0;
si->cy--;
}
}
static void
_termpty_line_rewrap(Termpty *ty, Termcell *src_cells, int len,
struct screen_info *si,
Eina_Bool set_cursor)
{
int autowrapped;
if (len == 0)
{
if (set_cursor)
{
si->cy = si->y;
si->cx = 0;
}
si->y++;
si->x = 0;
_check_screen_info(ty, si);
return;
}
autowrapped = src_cells[len-1].att.autowrapped;
src_cells[len-1].att.autowrapped = 0;
while (len > 0)
{
int copy_width = MIN(len, si->w - si->x);
Termcell *dst_cells = &SCREEN_INFO_GET_CELLS(si, si->x, si->y);
termpty_cell_copy(ty,
/*src*/ src_cells,
/*dst*/ dst_cells,
copy_width);
if (set_cursor)
{
if (ty->cursor_state.cx <= copy_width)
{
si->cx = ty->cursor_state.cx;
si->cy = si->y;
}
else
{
ty->cursor_state.cx -= copy_width;
}
}
len -= copy_width;
si->x += copy_width;
src_cells += copy_width;
if (si->x >= si->w)
{
if ((len > 0) || (len == 0 && autowrapped))
{
dst_cells = &SCREEN_INFO_GET_CELLS(si, 0, si->y);
dst_cells[si->w - 1].att.autowrapped = 1;
}
si->y++;
si->x = 0;
}
_check_screen_info(ty, si);
}
if (!autowrapped && si->x != 0)
{
si->y++;
si->x = 0;
_check_screen_info(ty, si);
}
}
void
termpty_resize(Termpty *ty, int new_w, int new_h)
{
Termcell *new_screen = NULL;
int old_y = 0,
old_w = ty->w,
old_h = ty->h,
effective_old_h;
int altbuf = 0;
struct screen_info new_si = {.screen = NULL};
if ((ty->w == new_w) && (ty->h == new_h)) return;
if ((new_w == new_h) && (new_w == 1)) return; // FIXME: something weird is
// going on at term init
termpty_backlog_lock();
if (ty->altbuf)
{
termpty_screen_swap(ty);
altbuf = 1;
}
new_screen = calloc(1, sizeof(Termcell) * new_w * new_h);
if (!new_screen)
goto bad;
free(ty->screen2);
ty->screen2 = calloc(1, sizeof(Termcell) * new_w * new_h);
if (!ty->screen2)
goto bad;
new_si.screen = new_screen;
new_si.w = new_w;
new_si.h = new_h;
/* compute the effective height on the old screen */
effective_old_h = 0;
for (old_y = old_h -1; old_y >= 0; old_y--)
{
Termcell *cells = &(TERMPTY_SCREEN(ty, 0, old_y));
if (!_termpty_line_is_empty(cells, old_w))
{
effective_old_h = old_y + 1;
break;
}
}
if (effective_old_h <= ty->cursor_state.cy)
effective_old_h = ty->cursor_state.cy + 1;
old_y = 0;
/* Rewrap the first line from the history if needed */
if (ty->backsize >= 1)
{
Termsave *ts;
ts = BACKLOG_ROW_GET(ty, 1);
ts = termpty_save_extract(ts);
if (ts->cells && ts->w && ts->cells[ts->w - 1].att.autowrapped)
{
Termcell *cells = &(TERMPTY_SCREEN(ty, 0, old_y)),
*new_cells;
int len;
ts->cells[ts->w - 1].att.autowrapped = 0;
len = termpty_line_length(cells, old_w);
new_cells = malloc((ts->w + len) * sizeof(Termcell));
if (!new_cells)
goto bad;
memcpy(new_cells, ts->cells, ts->w * sizeof(Termcell));
memcpy(new_cells + ts->w, cells, len * sizeof(Termcell));
len+= ts->w;
_backlog_remove_latest_nolock(ty);
_termpty_line_rewrap(ty, new_cells, len, &new_si,
old_y == ty->cursor_state.cy);
free(new_cells);
old_y = 1;
}
}
/* For all the other lines, do not care about the history */
for (; old_y < effective_old_h; old_y++)
{
/* for each line in the old screen, append it to the new screen */
Termcell *cells = &(TERMPTY_SCREEN(ty, 0, old_y));
int len;
len = termpty_line_length(cells, old_w);
_termpty_line_rewrap(ty, cells, len, &new_si,
old_y == ty->cursor_state.cy);
}
free(ty->screen);
ty->screen = new_screen;
ty->cursor_state.cy = (new_si.cy >= 0) ? new_si.cy : 0;
ty->cursor_state.cx = (new_si.cx >= 0) ? new_si.cx : 0;
ty->circular_offset = new_si.circular_offset;
ty->w = new_w;
ty->h = new_h;
ty->termstate.had_cr = 0;
ty->termstate.wrapnext = 0;
if (altbuf)
termpty_screen_swap(ty);
_limit_coord(ty);
_pty_size(ty);
termpty_backlog_unlock();
ty->backlog_beacon.backlog_y = 1;
ty->backlog_beacon.screen_y = 1;
return;
bad:
termpty_backlog_unlock();
free(new_screen);
}
void
termpty_backlog_size_set(Termpty *ty, size_t size)
{
if (ty->backsize == size)
return;
/* TODO: RESIZE: handle that case better: changing backscroll size */
termpty_backlog_lock();
if (ty->back)
{
size_t i;
for (i = 0; i < ty->backsize; i++)
termpty_save_free(&ty->back[i]);
free(ty->back);
}
if (size > 0)
ty->back = calloc(1, sizeof(Termsave) * size);
else
ty->back = NULL;
ty->backpos = 0;
ty->backsize = size;
termpty_backlog_unlock();
}
pid_t
termpty_pid_get(const Termpty *ty)
{
return ty->pid;
}
void
termpty_block_free(Termblock *tb)
{
char *s;
if (tb->path) eina_stringshare_del(tb->path);
if (tb->link) eina_stringshare_del(tb->link);
if (tb->chid) eina_stringshare_del(tb->chid);
if (tb->obj) evas_object_del(tb->obj);
EINA_LIST_FREE(tb->cmds, s) free(s);
free(tb);
}
Termblock *
termpty_block_new(Termpty *ty, int w, int h, const char *path, const char *link)
{
Termblock *tb;
int id;
id = ty->block.curid;
if (!ty->block.blocks)
ty->block.blocks = eina_hash_int32_new((Eina_Free_Cb)termpty_block_free);
if (!ty->block.blocks) return NULL;
tb = eina_hash_find(ty->block.blocks, &id);
if (tb)
{
if (tb->active)
ty->block.active = eina_list_remove(ty->block.active, tb);
eina_hash_del(ty->block.blocks, &id, tb);
}
tb = calloc(1, sizeof(Termblock));
if (!tb) return NULL;
tb->pty = ty;
tb->id = id;
tb->w = w;
tb->h = h;
tb->path = eina_stringshare_add(path);
if (link) tb->link = eina_stringshare_add(link);
eina_hash_add(ty->block.blocks, &id, tb);
ty->block.curid++;
if (ty->block.curid >= 8192) ty->block.curid = 0;
return tb;
}
void
termpty_block_insert(Termpty *ty, int ch, Termblock *blk)
{
// bit 0-8 = y (9b 0->511)
// bit 9-17 = x (9b 0->511)
// bit 18-30 = id (13b 0->8191)
// bit 31 = 1
//
// fg/bg = 8+8bit unused. (use for extra id bits? so 16 + 13 == 29bit?)
//
// cp = (1 << 31) | ((id 0x1fff) << 18) | ((x & 0x1ff) << 9) | (y & 0x1ff);
Termexp *ex;
ex = calloc(1, sizeof(Termexp));
if (!ex) return;
ex->ch = ch;
ex->left = blk->w * blk->h;
ex->id = blk->id;
ex->w = blk->w;
ex->h = blk->h;
ty->block.expecting = eina_list_append(ty->block.expecting, ex);
}
int
termpty_block_id_get(Termcell *cell, int *x, int *y)
{
int id;
if (!(cell->codepoint & 0x80000000)) return -1;
id = (cell->codepoint >> 18) & 0x1fff;
*x = (cell->codepoint >> 9) & 0x1ff;
*y = cell->codepoint & 0x1ff;
return id;
}
Termblock *
termpty_block_get(Termpty *ty, int id)
{
if (!ty->block.blocks) return NULL;
return eina_hash_find(ty->block.blocks, &id);
}
void
termpty_block_chid_update(Termpty *ty, Termblock *blk)
{
if (!blk->chid) return;
if (!ty->block.chid_map)
ty->block.chid_map = eina_hash_string_superfast_new(NULL);
if (!ty->block.chid_map) return;
eina_hash_add(ty->block.chid_map, blk->chid, blk);
}
Termblock *
termpty_block_chid_get(Termpty *ty, const char *chid)
{
Termblock *tb;
tb = eina_hash_find(ty->block.chid_map, chid);
return tb;
}
static void
_handle_block_codepoint_overwrite_heavy(Termpty *ty, int oldc, int newc)
{
Termblock *tb;
int ido = 0, idn = 0;
if (oldc & 0x80000000) ido = (oldc >> 18) & 0x1fff;
if (newc & 0x80000000) idn = (newc >> 18) & 0x1fff;
if (((oldc & 0x80000000) && (newc & 0x80000000)) && (idn == ido)) return;
if (oldc & 0x80000000)
{
tb = termpty_block_get(ty, ido);
if (!tb) return;
tb->refs--;
if (tb->refs == 0)
{
if (tb->active)
ty->block.active = eina_list_remove(ty->block.active, tb);
eina_hash_del(ty->block.blocks, &ido, tb);
}
}
if (newc & 0x80000000)
{
tb = termpty_block_get(ty, idn);
if (!tb) return;
tb->refs++;
}
}
/* Try to trick the compiler into inlining the first test */
static inline void
_handle_block_codepoint_overwrite(Termpty *ty, Eina_Unicode oldc, Eina_Unicode newc)
{
if (!((oldc | newc) & 0x80000000)) return;
_handle_block_codepoint_overwrite_heavy(ty, oldc, newc);
}
void
termpty_cell_copy(Termpty *ty, Termcell *src, Termcell *dst, int n)
{
int i;
for (i = 0; i < n; i++)
{
_handle_block_codepoint_overwrite(ty, dst[i].codepoint, src[i].codepoint);
dst[i] = src[i];
}
}
void
termpty_screen_swap(Termpty *ty)
{
Termcell *tmp_screen;
int tmp_circular_offset;
tmp_screen = ty->screen;
ty->screen = ty->screen2;
ty->screen2 = tmp_screen;
tmp_circular_offset = ty->circular_offset;
ty->circular_offset = ty->circular_offset2;
ty->circular_offset2 = tmp_circular_offset;
ty->altbuf = !ty->altbuf;
if (ty->cb.cancel_sel.func)
ty->cb.cancel_sel.func(ty->cb.cancel_sel.data);
}
void
termpty_cell_fill(Termpty *ty, Termcell *src, Termcell *dst, int n)
{
int i;
if (src)
{
for (i = 0; i < n; i++)
{
_handle_block_codepoint_overwrite(ty, dst[i].codepoint, src[0].codepoint);
dst[i] = src[0];
}
}
else
{
for (i = 0; i < n; i++)
{
_handle_block_codepoint_overwrite(ty, dst[i].codepoint, 0);
memset(&(dst[i]), 0, sizeof(*dst));
}
}
}
void
termpty_cell_codepoint_att_fill(Termpty *ty, Eina_Unicode codepoint,
Termatt att, Termcell *dst, int n)
{
Termcell local = { .codepoint = codepoint, .att = att };
int i;
for (i = 0; i < n; i++)
{
_handle_block_codepoint_overwrite(ty, dst[i].codepoint, codepoint);
dst[i] = local;
}
}
Config *
termpty_config_get(const Termpty *ty)
{
return termio_config_get(ty->obj);
}