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s390/con3270: add key help to status area 

To let the user know about function key bindings, print
them next to the Running/History field at the lower right
of the screen. Also print the scrollback position.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
Sven Schnelle 2022-11-29 12:28:36 +01:00 committed by Heiko Carstens
parent 0573fff205
commit 525c919d5e
1 changed files with 33 additions and 7 deletions
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40
drivers/s390/char/con3270.c
View File

@ -36,6 +36,7 @@
#define TTY3270_OUTPUT_BUFFER_SIZE 4096
#define TTY3270_SCREEN_PAGES 8 /* has to be power-of-two */
#define TTY3270_RECALL_SIZE 16 /* has to be power-of-two */
#define TTY3270_STATUS_AREA_SIZE 40
static struct tty_driver *tty3270_driver;
static int tty3270_max_index;
@ -223,7 +224,8 @@ static int tty3270_add_prompt(struct tty3270 *tp)
if (*tp->prompt) {
cp = tty3270_add_sf(tp, cp, TF_INMDT);
count = min_t(int, strlen(tp->prompt), tp->view.cols * 2 - 11);
count = min_t(int, strlen(tp->prompt),
tp->view.cols * 2 - TTY3270_STATUS_AREA_SIZE - 2);
memcpy(cp, tp->prompt, count);
cp += count;
} else {
@ -232,25 +234,49 @@ static int tty3270_add_prompt(struct tty3270 *tp)
*cp++ = TO_IC;
/* Clear to end of input line. */
if (count < tp->view.cols * 2 - 11)
cp = tty3270_add_ra(tp, cp, -9, -1, 0);
cp = tty3270_add_ra(tp, cp, -TTY3270_STATUS_AREA_SIZE, -1, 0);
return cp - tp->converted_line;
}
static char *tty3270_ebcdic_convert(struct tty3270 *tp, char *d, char *s)
{
while (*s)
*d++ = tp->view.ascebc[(int)*s++];
return d;
}
/*
* The status line is the last line of the screen. It shows the string
* "Running"/"Holding" in the lower right corner of the screen.
* "Running"/"History X" in the lower right corner of the screen.
*/
static int tty3270_add_status(struct tty3270 *tp)
{
char *cp = tp->converted_line;
int len;
cp = tty3270_add_ba(tp, cp, TO_SBA, -9, -1);
cp = tty3270_add_ba(tp, cp, TO_SBA, -TTY3270_STATUS_AREA_SIZE, -1);
cp = tty3270_add_sf(tp, cp, TF_LOG);
cp = tty3270_add_sa(tp, cp, TAT_FGCOLOR, TAC_GREEN);
len = sprintf(cp, tp->nr_up ? "History" : "Running");
codepage_convert(tp->view.ascebc, cp, len);
cp += len;
cp = tty3270_ebcdic_convert(tp, cp, " 7");
cp = tty3270_add_sa(tp, cp, TAT_EXTHI, TAX_REVER);
cp = tty3270_ebcdic_convert(tp, cp, "PrevPg");
cp = tty3270_add_sa(tp, cp, TAT_EXTHI, TAX_RESET);
cp = tty3270_ebcdic_convert(tp, cp, " 8");
cp = tty3270_add_sa(tp, cp, TAT_EXTHI, TAX_REVER);
cp = tty3270_ebcdic_convert(tp, cp, "NextPg");
cp = tty3270_add_sa(tp, cp, TAT_EXTHI, TAX_RESET);
cp = tty3270_ebcdic_convert(tp, cp, " 12");
cp = tty3270_add_sa(tp, cp, TAT_EXTHI, TAX_REVER);
cp = tty3270_ebcdic_convert(tp, cp, "Recall");
cp = tty3270_add_sa(tp, cp, TAT_EXTHI, TAX_RESET);
cp = tty3270_ebcdic_convert(tp, cp, " ");
if (tp->nr_up) {
len = sprintf(cp, "History %d", -tp->nr_up);
codepage_convert(tp->view.ascebc, cp, len);
cp += len;
} else {
cp = tty3270_ebcdic_convert(tp, cp, "Running");
}
cp = tty3270_add_sf(tp, cp, TF_LOG);
cp = tty3270_add_sa(tp, cp, TAT_FGCOLOR, TAC_RESET);
return cp - (char *)tp->converted_line;