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More input compatibility love. Support C0 within escape sequences, and the C0

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control character VT (vertical tab, \013), which is treated as LF like
VT102. Makes another vttest happy.
This commit is contained in:
Nicholas Marriott 2009-06-04 14:15:50 +00:00
parent 0ba85cc326
commit 8dd2f0da3f
1 changed files with 38 additions and 7 deletions
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45
input.c
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@ -394,15 +394,28 @@ input_state_sequence_first(u_char ch, struct input_ctx *ictx)
ictx->private = '\0';
ARRAY_CLEAR(&ictx->args);
input_state(ictx, input_state_sequence_next);
if (INPUT_PARAMETER(ch)) {
input_new_argument(ictx);
if (ch >= 0x3c && ch <= 0x3f) {
/* Private control sequence. */
ictx->private = ch;
/* Most C0 control are accepted within CSI. */
if (INPUT_C0CONTROL(ch)) {
if (ch == 0x1b) { /* ESC */
/* Abort sequence and begin with new. */
input_state(ictx, input_state_escape);
} else if (ch != 0x18 && ch != 0x1a) { /* CAN and SUB */
/* Handle C0 immediately. */
input_handle_c0_control(ch, ictx);
}
/*
* Just come back to this state, in case the next character
* is the start of a private sequence.
*/
return;
}
input_state(ictx, input_state_sequence_next);
/* Private sequence: always the first character. */
if (ch >= 0x3c && ch <= 0x3f) {
ictx->private = ch;
return;
}
/* Pass character on directly. */
@ -423,6 +436,9 @@ input_state_sequence_next(u_char ch, struct input_ctx *ictx)
}
if (INPUT_PARAMETER(ch)) {
if (ARRAY_EMPTY(&ictx->args))
input_new_argument(ictx);
if (ch == ';') {
if (input_add_argument(ictx, '\0') != 0)
input_state(ictx, input_state_first);
@ -443,6 +459,18 @@ input_state_sequence_next(u_char ch, struct input_ctx *ictx)
return;
}
/* Most C0 control are accepted within CSI. */
if (INPUT_C0CONTROL(ch)) {
if (ch == 0x1b) { /* ESC */
/* Abort sequence and begin with new. */
input_state(ictx, input_state_escape);
} else if (ch != 0x18 && ch != 0x1a) { /* CAN and SUB */
/* Handle C0 immediately. */
input_handle_c0_control(ch, ictx);
}
return;
}
input_state(ictx, input_state_first);
}
@ -612,6 +640,9 @@ input_handle_c0_control(u_char ch, struct input_ctx *ictx)
}
screen_write_cursormove(&ictx->ctx, s->cx, s->cy);
break;
case '\013': /* VT */
screen_write_linefeed(&ictx->ctx);
break;
case '\016': /* SO */
ictx->cell.attr |= GRID_ATTR_CHARSET;
break;