/****************************************************************************
- * Copyright (c) 2008-2013,2015 Free Software Foundation, Inc. *
+ * Copyright 2020,2021 Thomas E. Dickey *
+ * Copyright 2008-2016,2017 Free Software Foundation, Inc. *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the *
#define USE_LIBTINFO
#include <progs.priv.h>
+#include <tty_settings.h>
-MODULE_ID("$Id: tabs.c,v 1.36 2015/04/18 22:20:21 James.Clarke Exp $")
+MODULE_ID("$Id: tabs.c,v 1.50 2021/10/10 00:54:41 tom Exp $")
-static void usage(void) GCC_NORETURN;
+static GCC_NORETURN void usage(void);
-static char *prg_name;
+const char *_nc_progname;
static int max_cols;
static void
return putchar(c);
}
+static char *
+skip_csi(char *value)
+{
+ if (UChar(*value) == 0x9b)
+ ++value;
+ else if (!strncmp(value, "\033[", 2))
+ value += 2;
+ return value;
+}
+
+/*
+ * If the terminal uses ANSI clear_all_tabs, then it is not necessary to first
+ * move to the left margin before clearing tabs.
+ */
+static bool
+ansi_clear_tabs(void)
+{
+ bool result = FALSE;
+ if (VALID_STRING(clear_all_tabs)) {
+ char *param = skip_csi(clear_all_tabs);
+ if (!strcmp(param, "3g"))
+ result = TRUE;
+ }
+ return result;
+}
+
static void
do_tabs(int *tab_list)
{
int last = 1;
int stop;
+ bool first = TRUE;
- putchar('\r');
while ((stop = *tab_list++) > 0) {
+ if (first) {
+ first = FALSE;
+ putchar('\r');
+ }
if (last < stop) {
while (last++ < stop) {
if (last > max_cols)
}
}
if (stop <= max_cols) {
- tputs(tparm(set_tab, stop), 1, putch);
+ tputs(set_tab, 1, putch);
last = stop;
} else {
break;
putchar('\r');
}
+/*
+ * Decode a list of tab-stops from a string, returning an array of integers.
+ * If the margin is positive (because the terminal does not support margins),
+ * work around this by adding the margin to the decoded values.
+ */
static int *
-decode_tabs(const char *tab_list)
+decode_tabs(const char *tab_list, int margin)
{
int *result = typeCalloc(int, strlen(tab_list) + (unsigned) max_cols);
int n = 0;
if (result == 0)
failed("decode_tabs");
+ if (margin < 0)
+ margin = 0;
+
while ((ch = *tab_list++) != '\0') {
if (isdigit(UChar(ch))) {
value *= 10;
value += (ch - '0');
} else if (ch == ',') {
- result[n] = value + prior;
+ result[n] = value + prior + margin;
if (n > 0 && result[n] <= result[n - 1]) {
fprintf(stderr,
"%s: tab-stops are not in increasing order: %d %d\n",
- prg_name, value, result[n - 1]);
+ _nc_progname, value, result[n - 1]);
free(result);
result = 0;
break;
int step = value;
value = 1;
while (n < max_cols - 1) {
- result[n++] = value;
+ result[n++] = value + margin;
value += step;
}
}
/*
* Add the last value, if any.
*/
- result[n++] = value + prior;
+ result[n++] = value + prior + margin;
result[n] = 0;
}
}
static void
-print_ruler(int *tab_list)
+print_ruler(int *tab_list, const char *new_line)
{
int last = 0;
- int stop;
int n;
/* first print a readable ruler */
: (ch + 'A' - 10)));
printf("%.*s", ((max_cols - n) > 10) ? 10 : (max_cols - n), buffer);
}
- putchar('\n');
+ printf("%s", new_line);
/* now, print '*' for each stop */
for (n = 0, last = 0; (tab_list[n] > 0) && (last < max_cols); ++n) {
- stop = tab_list[n];
+ int stop = tab_list[n];
+
while (++last < stop) {
if (last <= max_cols) {
putchar('-');
}
while (++last <= max_cols)
putchar('-');
- putchar('\n');
+ printf("%s", new_line);
}
/*
* ruler.
*/
static void
-write_tabs(int *tab_list)
+write_tabs(int *tab_list, const char *new_line)
{
int stop;
/* also show a tab _past_ the stops */
if (stop < max_cols)
fputs("\t+", stdout);
- putchar('\n');
+ fputs(new_line, stdout);
}
/*
trimmed_tab_list(const char *source)
{
char *result = strdup(source);
- int ch, j, k, last;
-
if (result != 0) {
+ int j, k, last;
+
for (j = k = last = 0; result[j] != 0; ++j) {
- ch = UChar(result[j]);
+ int ch = UChar(result[j]);
if (isspace(ch)) {
if (last == '\0') {
continue;
*append = result;
}
+ free(copied);
+ return result;
+}
+
+/*
+ * If the terminal supports it, (re)set the left margin and return true.
+ * Otherwise, return false.
+ */
+static bool
+do_set_margin(int margin, bool no_op)
+{
+ bool result = FALSE;
+
+ if (margin == 0) { /* 0 is special case for resetting */
+ if (VALID_STRING(clear_margins)) {
+ result = TRUE;
+ if (!no_op)
+ tputs(clear_margins, 1, putch);
+ }
+ } else if (margin-- < 0) { /* margin will be 0-based from here on */
+ result = TRUE;
+ } else if (VALID_STRING(set_left_margin)) {
+ result = TRUE;
+ if (!no_op) {
+ /*
+ * assuming we're on the first column of the line, move the cursor
+ * to the column at which we will set a margin.
+ */
+ if (VALID_STRING(column_address)) {
+ tputs(TIPARM_1(column_address, margin), 1, putch);
+ } else if (margin >= 1) {
+ if (VALID_STRING(parm_right_cursor)) {
+ tputs(TIPARM_1(parm_right_cursor, margin), 1, putch);
+ } else {
+ while (margin-- > 0)
+ putch(' ');
+ }
+ }
+ tputs(set_left_margin, 1, putch);
+ }
+ } else if (VALID_STRING(set_left_margin_parm)) {
+ result = TRUE;
+ if (!no_op) {
+ if (VALID_STRING(set_right_margin_parm)) {
+ tputs(TIPARM_1(set_left_margin_parm, margin), 1, putch);
+ } else {
+ tputs(TIPARM_2(set_left_margin_parm, margin, max_cols), 1, putch);
+ }
+ }
+ } else if (VALID_STRING(set_lr_margin)) {
+ result = TRUE;
+ if (!no_op) {
+ tputs(TIPARM_2(set_lr_margin, margin, max_cols), 1, putch);
+ }
+ }
return result;
}
if (tab_list != 0 && *tab_list != '\0') {
if (comma_is_needed(tab_list)) {
- int n, ch;
+ int n;
+
for (n = 0; tab_list[n] != '\0'; ++n) {
- ch = UChar(tab_list[n]);
+ int ch = UChar(tab_list[n]);
+
if (!(isdigit(ch) || ch == ',' || ch == '+')) {
fprintf(stderr,
"%s: unexpected character found '%c'\n",
- prg_name, ch);
+ _nc_progname, ch);
result = FALSE;
break;
}
}
} else {
- fprintf(stderr, "%s: trailing comma found '%s'\n", prg_name, tab_list);
+ fprintf(stderr, "%s: trailing comma found '%s'\n", _nc_progname, tab_list);
result = FALSE;
}
} else {
- fprintf(stderr, "%s: no tab-list given\n", prg_name);
- result = FALSE;
+ /* if no list given, default to "tabs -8" */
}
return result;
}
int rc = EXIT_FAILURE;
bool debug = FALSE;
bool no_op = FALSE;
+ bool change_tty = FALSE;
int n, ch;
NCURSES_CONST char *term_name = 0;
char *append = 0;
const char *tab_list = 0;
+ const char *new_line = "\n";
+ int margin = -1;
+ TTY tty_settings;
+ int fd;
- prg_name = _nc_rootname(argv[0]);
+ _nc_progname = _nc_rootname(argv[0]);
if ((term_name = getenv("TERM")) == 0)
term_name = "ansi+tabs";
if (*++option != '\0') {
term_name = option;
} else {
- term_name = argv[n++];
+ term_name = argv[n];
option--;
}
option += ((int) strlen(option)) - 1;
}
break;
case '+':
- while ((ch = *++option) != '\0') {
+ if ((ch = *++option) != '\0') {
+ int digits = 0;
+ int number = 0;
+
switch (ch) {
case 'm':
/*
* att510d implements smgl, which is needed to support
* this option.
*/
+ while ((ch = *++option) != '\0') {
+ if (isdigit(UChar(ch))) {
+ ++digits;
+ number = number * 10 + (ch - '0');
+ } else {
+ usage();
+ }
+ }
+ if (digits == 0)
+ number = 10;
+ margin = number;
break;
default:
/* special case of relative stops separated by spaces? */
}
}
- setupterm(term_name, STDOUT_FILENO, (int *) 0);
+ fd = save_tty_settings(&tty_settings, FALSE);
+
+ setupterm(term_name, fd, (int *) 0);
max_cols = (columns > 0) ? columns : 80;
+ if (margin > 0)
+ max_cols -= margin;
if (!VALID_STRING(clear_all_tabs)) {
fprintf(stderr,
"%s: terminal type '%s' cannot reset tabs\n",
- prg_name, term_name);
+ _nc_progname, term_name);
} else if (!VALID_STRING(set_tab)) {
fprintf(stderr,
"%s: terminal type '%s' cannot set tabs\n",
- prg_name, term_name);
+ _nc_progname, term_name);
} else if (legal_tab_list(tab_list)) {
- int *list = decode_tabs(tab_list);
+ int *list;
+
+ if (tab_list == NULL)
+ tab_list = add_to_tab_list(&append, "8");
+
+ if (!no_op) {
+#if defined(TERMIOS) && defined(OCRNL)
+ /* set tty modes to -ocrnl to allow \r */
+ if (isatty(STDOUT_FILENO)) {
+ TTY new_settings = tty_settings;
+ new_settings.c_oflag &= (unsigned)~OCRNL;
+ update_tty_settings(&tty_settings, &new_settings);
+ change_tty = TRUE;
+ new_line = "\r\n";
+ }
+#endif
- if (!no_op)
+ if (!ansi_clear_tabs())
+ putch('\r');
tputs(clear_all_tabs, 1, putch);
+ }
+
+ if (margin >= 0) {
+ putch('\r');
+ if (margin > 0) {
+ /* reset existing margin before setting margin, to reduce
+ * problems moving left of the current margin.
+ */
+ if (do_set_margin(0, no_op))
+ putch('\r');
+ }
+ if (do_set_margin(margin, no_op))
+ margin = -1;
+ }
+
+ list = decode_tabs(tab_list, margin);
if (list != 0) {
if (!no_op)
do_tabs(list);
if (debug) {
fflush(stderr);
- printf("tabs %s\n", tab_list);
- print_ruler(list);
- write_tabs(list);
+ printf("tabs %s%s", tab_list, new_line);
+ print_ruler(list, new_line);
+ write_tabs(list, new_line);
}
free(list);
} else if (debug) {
fflush(stderr);
- printf("tabs %s\n", tab_list);
+ printf("tabs %s%s", tab_list, new_line);
+ }
+ if (!no_op) {
+ if (change_tty) {
+ restore_tty_settings();
+ }
}
rc = EXIT_SUCCESS;
}
projects / ncurses.git / blobdiff