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Support passing through escape sequences to the underlying terminal by

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using DCS with a "tmux;" prefix. Escape characters in the sequences must
be doubled. For example:

$ printf '\033Ptmux;\033\033]12;red\007\033\\'

Will pass \033]12;red\007 to the terminal (and change the cursor colour
in xterm). From Kevin Goodsell.
This commit is contained in:
Nicholas Marriott
2011-03-07 23:46:27 +00:00
parent d5ed5fb08f
commit 79e30daeae
4 changed files with 73 additions and 24 deletions
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73
input.c
View File

@ -41,6 +41,9 @@
*
* - A state for the screen \033k...\033\\ sequence to rename a window. This is
* pretty stupid but not supporting it is more trouble than it is worth.
*
* - Special handling for ESC inside a DCS to allow arbitrary byte sequences to
* be passed to the underlying teminal(s).
*/
/* Helper functions. */
@ -50,8 +53,6 @@ void input_reply(struct input_ctx *, const char *, ...);
/* Transition entry/exit handlers. */
void input_clear(struct input_ctx *);
void input_enter_dcs(struct input_ctx *);
void input_exit_dcs(struct input_ctx *);
void input_enter_osc(struct input_ctx *);
void input_exit_osc(struct input_ctx *);
void input_enter_apc(struct input_ctx *);
@ -68,6 +69,7 @@ int input_c0_dispatch(struct input_ctx *);
int input_esc_dispatch(struct input_ctx *);
int input_csi_dispatch(struct input_ctx *);
void input_csi_dispatch_sgr(struct input_ctx *);
int input_dcs_dispatch(struct input_ctx *);
int input_utf8_open(struct input_ctx *);
int input_utf8_add(struct input_ctx *);
int input_utf8_close(struct input_ctx *);
@ -204,6 +206,7 @@ const struct input_transition input_state_dcs_enter_table[];
const struct input_transition input_state_dcs_parameter_table[];
const struct input_transition input_state_dcs_intermediate_table[];
const struct input_transition input_state_dcs_handler_table[];
const struct input_transition input_state_dcs_escape_table[];
const struct input_transition input_state_dcs_ignore_table[];
const struct input_transition input_state_osc_string_table[];
const struct input_transition input_state_apc_string_table[];
@ -286,10 +289,17 @@ const struct input_state input_state_dcs_intermediate = {
/* dcs_handler state definition. */
const struct input_state input_state_dcs_handler = {
"dcs_handler",
input_enter_dcs, input_exit_dcs,
NULL, NULL,
input_state_dcs_handler_table
};
/* dcs_escape state definition. */
const struct input_state input_state_dcs_escape = {
"dcs_escape",
NULL, NULL,
input_state_dcs_escape_table
};
/* dcs_ignore state definition. */
const struct input_state input_state_dcs_ignore = {
"dcs_ignore",
@ -482,7 +492,7 @@ const struct input_transition input_state_dcs_enter_table[] = {
{ 0x3a, 0x3a, NULL, &input_state_dcs_ignore },
{ 0x3b, 0x3b, input_parameter, &input_state_dcs_parameter },
{ 0x3c, 0x3f, input_intermediate, &input_state_dcs_parameter },
{ 0x40, 0x7e, NULL, &input_state_dcs_handler },
{ 0x40, 0x7e, input_input, &input_state_dcs_handler },
{ 0x7f, 0xff, NULL, NULL },
{ -1, -1, NULL, NULL }
@ -500,7 +510,7 @@ const struct input_transition input_state_dcs_parameter_table[] = {
{ 0x3a, 0x3a, NULL, &input_state_dcs_ignore },
{ 0x3b, 0x3b, input_parameter, NULL },
{ 0x3c, 0x3f, NULL, &input_state_dcs_ignore },
{ 0x40, 0x7e, NULL, &input_state_dcs_handler },
{ 0x40, 0x7e, input_input, &input_state_dcs_handler },
{ 0x7f, 0xff, NULL, NULL },
{ -1, -1, NULL, NULL }
@ -515,7 +525,7 @@ const struct input_transition input_state_dcs_intermediate_table[] = {
{ 0x1c, 0x1f, NULL, NULL },
{ 0x20, 0x2f, input_intermediate, NULL },
{ 0x30, 0x3f, NULL, &input_state_dcs_ignore },
{ 0x40, 0x7e, NULL, &input_state_dcs_handler },
{ 0x40, 0x7e, input_input, &input_state_dcs_handler },
{ 0x7f, 0xff, NULL, NULL },
{ -1, -1, NULL, NULL }
@ -523,13 +533,22 @@ const struct input_transition input_state_dcs_intermediate_table[] = {
/* dcs_handler state table. */
const struct input_transition input_state_dcs_handler_table[] = {
INPUT_STATE_ANYWHERE,
/* No INPUT_STATE_ANYWHERE */
{ 0x00, 0x17, NULL, NULL },
{ 0x19, 0x19, input_input, NULL },
{ 0x1c, 0x1f, input_input, NULL },
{ 0x20, 0x7e, input_input, NULL },
{ 0x7f, 0xff, NULL, NULL },
{ 0x00, 0x1a, input_input, NULL },
{ 0x1b, 0x1b, NULL, &input_state_dcs_escape },
{ 0x1c, 0xff, input_input, NULL },
{ -1, -1, NULL, NULL }
};
/* dcs_escape state table. */
const struct input_transition input_state_dcs_escape_table[] = {
/* No INPUT_STATE_ANYWHERE */
{ 0x00, 0x5b, input_input, &input_state_dcs_handler },
{ 0x5c, 0x5c, input_dcs_dispatch, &input_state_ground },
{ 0x5d, 0xff, input_input, &input_state_dcs_handler },
{ -1, -1, NULL, NULL }
};
@ -1391,20 +1410,26 @@ input_csi_dispatch_sgr(struct input_ctx *ictx)
}
}
/* DCS string started. */
void
input_enter_dcs(struct input_ctx *ictx)
{
log_debug("%s", __func__);
input_clear(ictx);
}
/* DCS terminator (ST) received. */
void
input_exit_dcs(unused struct input_ctx *ictx)
int
input_dcs_dispatch(struct input_ctx *ictx)
{
log_debug("%s", __func__);
const char prefix[] = "tmux;";
const u_int prefix_len = (sizeof prefix) - 1;
if (ictx->flags & INPUT_DISCARD)
return (0);
log_debug("%s: \"%s\"", __func__, ictx->input_buf);
/* Check for tmux prefix. */
if (ictx->input_len >= prefix_len &&
strncmp(ictx->input_buf, prefix, prefix_len) == 0) {
screen_write_rawstring(&ictx->ctx,
ictx->input_buf + prefix_len, ictx->input_len - prefix_len);
}
return (0);
}
/* OSC string started. */