tmux/control.c

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/* $OpenBSD$ */
/*
* Copyright (c) 2012 Nicholas Marriott <nicholas.marriott@gmail.com>
* Copyright (c) 2012 George Nachman <tmux@georgester.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <event.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "tmux.h"
/* Control offsets. */
struct control_offset {
u_int pane;
struct window_pane_offset offset;
int flags;
#define CONTROL_OFFSET_OFF 0x1
RB_ENTRY(control_offset) entry;
};
RB_HEAD(control_offsets, control_offset);
/* Control state. */
struct control_state {
struct control_offsets offsets;
};
/* Compare client offsets. */
static int
control_offset_cmp(struct control_offset *co1, struct control_offset *co2)
{
if (co1->pane < co2->pane)
return (-1);
if (co1->pane > co2->pane)
return (1);
return (0);
}
RB_GENERATE_STATIC(control_offsets, control_offset, entry, control_offset_cmp);
/* Get pane offsets for this client. */
static struct control_offset *
control_get_offset(struct client *c, struct window_pane *wp)
{
struct control_state *cs = c->control_state;
struct control_offset co = { .pane = wp->id };
return (RB_FIND(control_offsets, &cs->offsets, &co));
}
/* Add pane offsets for this client. */
static struct control_offset *
control_add_offset(struct client *c, struct window_pane *wp)
{
struct control_state *cs = c->control_state;
struct control_offset *co;
co = control_get_offset(c, wp);
if (co != NULL)
return (co);
co = xcalloc(1, sizeof *co);
co->pane = wp->id;
RB_INSERT(control_offsets, &cs->offsets, co);
memcpy(&co->offset, &wp->offset, sizeof co->offset);
return (co);
}
/* Free control offsets. */
void
control_free_offsets(struct client *c)
{
struct control_state *cs = c->control_state;
struct control_offset *co, *co1;
RB_FOREACH_SAFE(co, control_offsets, &cs->offsets, co1) {
RB_REMOVE(control_offsets, &cs->offsets, co);
free(co);
}
}
/* Get offsets for client. */
struct window_pane_offset *
control_pane_offset(struct client *c, struct window_pane *wp, int *off)
{
struct control_offset *co;
if (c->flags & CLIENT_CONTROL_NOOUTPUT) {
*off = 0;
return (NULL);
}
co = control_get_offset(c, wp);
if (co == NULL) {
*off = 0;
return (NULL);
}
if (co->flags & CONTROL_OFFSET_OFF) {
*off = 1;
return (NULL);
}
return (&co->offset);
}
/* Set pane as on. */
void
control_set_pane_on(struct client *c, struct window_pane *wp)
{
struct control_offset *co;
co = control_get_offset(c, wp);
if (co != NULL) {
co->flags &= ~CONTROL_OFFSET_OFF;
memcpy(&co->offset, &wp->offset, sizeof co->offset);
}
}
/* Set pane as off. */
void
control_set_pane_off(struct client *c, struct window_pane *wp)
{
struct control_offset *co;
co = control_add_offset(c, wp);
co->flags |= CONTROL_OFFSET_OFF;
}
/* Write a line. */
void
control_write(struct client *c, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
file_vprint(c, fmt, ap);
file_print(c, "\n");
va_end(ap);
}
/* Write output from a pane. */
void
control_write_output(struct client *c, struct window_pane *wp)
{
struct control_offset *co;
struct evbuffer *message;
u_char *new_data;
size_t new_size, i;
if (c->flags & CLIENT_CONTROL_NOOUTPUT)
return;
/*
* Only write input if the window pane is linked to a window belonging
* to the client's session.
*/
if (winlink_find_by_window(&c->session->windows, wp->window) == NULL)
return;
co = control_add_offset(c, wp);
if (co->flags & CONTROL_OFFSET_OFF) {
window_pane_update_used_data(wp, &co->offset, SIZE_MAX, 1);
return;
}
new_data = window_pane_get_new_data(wp, &co->offset, &new_size);
if (new_size == 0)
return;
message = evbuffer_new();
if (message == NULL)
fatalx("out of memory");
evbuffer_add_printf(message, "%%output %%%u ", wp->id);
for (i = 0; i < new_size; i++) {
if (new_data[i] < ' ' || new_data[i] == '\\')
evbuffer_add_printf(message, "\\%03o", new_data[i]);
else
evbuffer_add_printf(message, "%c", new_data[i]);
}
evbuffer_add(message, "", 1);
control_write(c, "%s", EVBUFFER_DATA(message));
evbuffer_free(message);
window_pane_update_used_data(wp, &co->offset, new_size, 1);
}
/* Control error callback. */
static enum cmd_retval
control_error(struct cmdq_item *item, void *data)
{
struct client *c = cmdq_get_client(item);
char *error = data;
cmdq_guard(item, "begin", 1);
control_write(c, "parse error: %s", error);
cmdq_guard(item, "error", 1);
free(error);
return (CMD_RETURN_NORMAL);
}
/* Control input callback. Read lines and fire commands. */
static void
control_callback(__unused struct client *c, __unused const char *path,
int read_error, int closed, struct evbuffer *buffer, __unused void *data)
{
char *line, *error;
struct cmdq_state *state;
enum cmd_parse_status status;
if (closed || read_error != 0)
c->flags |= CLIENT_EXIT;
for (;;) {
line = evbuffer_readln(buffer, NULL, EVBUFFER_EOL_LF);
if (line == NULL)
break;
log_debug("%s: %s", __func__, line);
if (*line == '\0') { /* empty line exit */
free(line);
c->flags |= CLIENT_EXIT;
break;
}
state = cmdq_new_state(NULL, NULL, CMDQ_STATE_CONTROL);
status = cmd_parse_and_append(line, NULL, c, state, &error);
if (status == CMD_PARSE_ERROR)
cmdq_append(c, cmdq_get_callback(control_error, error));
cmdq_free_state(state);
free(line);
}
}
/* Initialize for control mode. */
void
control_start(struct client *c)
{
struct control_state *cs;
cs = c->control_state = xcalloc(1, sizeof *cs);
RB_INIT(&cs->offsets);
file_read(c, "-", control_callback, c);
if (c->flags & CLIENT_CONTROLCONTROL)
file_print(c, "\033P1000p");
}
/* Stop control mode. */
void
control_stop(struct client *c)
{
struct control_state *cs = c->control_state;
control_free_offsets(c);
free(cs);
}