tmux/cmd-queue.c

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/* $OpenBSD$ */
/*
* Copyright (c) 2013 Nicholas Marriott <nicholas.marriott@gmail.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 <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "tmux.h"
static enum cmd_retval cmdq_continue_one(struct cmd_q *);
static void cmdq_flush(struct cmd_q *);
/* Create new command queue. */
struct cmd_q *
cmdq_new(struct client *c)
{
struct cmd_q *cmdq;
cmdq = xcalloc(1, sizeof *cmdq);
cmdq->references = 1;
cmdq->flags = 0;
cmdq->client = c;
cmdq->client_exit = -1;
TAILQ_INIT(&cmdq->queue);
cmdq->item = NULL;
cmdq->cmd = NULL;
cmd_find_clear_state(&cmdq->current, NULL, 0);
cmdq->parent = NULL;
return (cmdq);
}
/* Free command queue */
int
cmdq_free(struct cmd_q *cmdq)
{
if (--cmdq->references != 0) {
if (cmdq->flags & CMD_Q_DEAD)
return (1);
return (0);
}
cmdq_flush(cmdq);
free(cmdq);
return (1);
}
/* Show message from command. */
void
cmdq_print(struct cmd_q *cmdq, const char *fmt, ...)
{
struct client *c = cmdq->client;
struct window *w;
va_list ap;
char *tmp, *msg;
va_start(ap, fmt);
if (c == NULL)
/* nothing */;
else if (c->session == NULL || (c->flags & CLIENT_CONTROL)) {
if (~c->flags & CLIENT_UTF8) {
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xvasprintf(&tmp, fmt, ap);
msg = utf8_sanitize(tmp);
free(tmp);
evbuffer_add(c->stdout_data, msg, strlen(msg));
free(msg);
} else
evbuffer_add_vprintf(c->stdout_data, fmt, ap);
evbuffer_add(c->stdout_data, "\n", 1);
server_client_push_stdout(c);
} else {
w = c->session->curw->window;
if (w->active->mode != &window_copy_mode) {
window_pane_reset_mode(w->active);
window_pane_set_mode(w->active, &window_copy_mode);
window_copy_init_for_output(w->active);
}
window_copy_vadd(w->active, fmt, ap);
}
va_end(ap);
}
/* Show error from command. */
void
cmdq_error(struct cmd_q *cmdq, const char *fmt, ...)
{
struct client *c = cmdq->client;
struct cmd *cmd = cmdq->cmd;
va_list ap;
char *msg;
size_t msglen;
char *tmp;
va_start(ap, fmt);
msglen = xvasprintf(&msg, fmt, ap);
va_end(ap);
if (c == NULL)
cfg_add_cause("%s:%u: %s", cmd->file, cmd->line, msg);
else if (c->session == NULL || (c->flags & CLIENT_CONTROL)) {
if (~c->flags & CLIENT_UTF8) {
tmp = msg;
msg = utf8_sanitize(tmp);
free(tmp);
msglen = strlen(msg);
}
evbuffer_add(c->stderr_data, msg, msglen);
evbuffer_add(c->stderr_data, "\n", 1);
server_client_push_stderr(c);
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c->retval = 1;
} else {
*msg = toupper((u_char) *msg);
status_message_set(c, "%s", msg);
}
free(msg);
}
/* Print a guard line. */
void
cmdq_guard(struct cmd_q *cmdq, const char *guard, int flags)
{
struct client *c = cmdq->client;
if (c == NULL || !(c->flags & CLIENT_CONTROL))
return;
evbuffer_add_printf(c->stdout_data, "%%%s %ld %u %d\n", guard,
(long) cmdq->time, cmdq->number, flags);
server_client_push_stdout(c);
}
/* Add command list to queue and begin processing if needed. */
void
cmdq_run(struct cmd_q *cmdq, struct cmd_list *cmdlist, struct mouse_event *m)
{
cmdq_append(cmdq, cmdlist, m);
if (cmdq->item == NULL) {
cmdq->cmd = NULL;
cmdq_continue(cmdq);
}
}
/* Add command list to queue. */
void
cmdq_append(struct cmd_q *cmdq, struct cmd_list *cmdlist, struct mouse_event *m)
{
struct cmd_q_item *item;
item = xcalloc(1, sizeof *item);
item->cmdlist = cmdlist;
TAILQ_INSERT_TAIL(&cmdq->queue, item, qentry);
cmdlist->references++;
if (m != NULL)
memcpy(&item->mouse, m, sizeof item->mouse);
else
item->mouse.valid = 0;
}
/* Find hooks list. */
static struct hooks *
cmdq_get_hooks(struct cmd_q *cmdq)
{
struct session *s;
s = NULL;
if (cmdq->state.tflag.s != NULL)
s = cmdq->state.tflag.s;
else if (cmdq->state.sflag.s != NULL)
s = cmdq->state.sflag.s;
else if (cmdq->state.c != NULL)
s = cmdq->state.c->session;
if (s != NULL)
return (s->hooks);
return (global_hooks);
}
/* Process one command. */
static enum cmd_retval
cmdq_continue_one(struct cmd_q *cmdq)
{
struct cmd *cmd = cmdq->cmd;
const char *name = cmd->entry->name;
struct hooks *hooks;
enum cmd_retval retval;
char *tmp;
int flags = !!(cmd->flags & CMD_CONTROL);
tmp = cmd_print(cmd);
log_debug("cmdq %p: %s", cmdq, tmp);
free(tmp);
cmdq->time = time(NULL);
cmdq->number++;
if (~cmdq->flags & CMD_Q_REENTRY)
cmdq_guard(cmdq, "begin", flags);
if (cmd_prepare_state(cmd, cmdq, cmdq->parent) != 0)
goto error;
if (~cmdq->flags & CMD_Q_NOHOOKS) {
hooks = cmdq_get_hooks(cmdq);
if (~cmdq->flags & CMD_Q_REENTRY) {
cmdq->flags |= CMD_Q_REENTRY;
if (hooks_wait(hooks, cmdq, NULL,
"before-%s", name) == 0)
return (CMD_RETURN_WAIT);
if (cmd_prepare_state(cmd, cmdq, cmdq->parent) != 0)
goto error;
}
} else
hooks = NULL;
cmdq->flags &= ~CMD_Q_REENTRY;
retval = cmd->entry->exec(cmd, cmdq);
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if (retval == CMD_RETURN_ERROR)
goto error;
if (hooks != NULL) {
if (cmd_prepare_state(cmd, cmdq, cmdq->parent) != 0)
goto error;
hooks = cmdq_get_hooks(cmdq);
if (hooks_wait(hooks, cmdq, NULL, "after-%s", name) == 0)
retval = CMD_RETURN_WAIT;
}
cmdq_guard(cmdq, "end", flags);
return (retval);
error:
cmdq_guard(cmdq, "error", flags);
cmdq->flags &= ~CMD_Q_REENTRY;
return (CMD_RETURN_ERROR);
}
/* Continue processing command queue. Returns 1 if finishes empty. */
int
cmdq_continue(struct cmd_q *cmdq)
{
struct client *c = cmdq->client;
struct cmd_q_item *next;
enum cmd_retval retval;
int empty;
cmdq->references++;
notify_disable();
cmd_find_clear_state(&cmdq->current, NULL, 0);
log_debug("continuing cmdq %p: flags %#x, client %p", cmdq, cmdq->flags,
c);
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empty = TAILQ_EMPTY(&cmdq->queue);
if (empty)
goto empty;
/*
* If the command isn't in the middle of running hooks (due to
* CMD_RETURN_WAIT), move onto the next command; otherwise, leave the
* state of the queue as it is.
*/
if (~cmdq->flags & CMD_Q_REENTRY) {
if (cmdq->item == NULL) {
cmdq->item = TAILQ_FIRST(&cmdq->queue);
cmdq->cmd = TAILQ_FIRST(&cmdq->item->cmdlist->list);
} else
cmdq->cmd = TAILQ_NEXT(cmdq->cmd, qentry);
}
do {
while (cmdq->cmd != NULL) {
retval = cmdq_continue_one(cmdq);
if (retval == CMD_RETURN_ERROR)
break;
if (retval == CMD_RETURN_WAIT)
goto out;
if (retval == CMD_RETURN_STOP) {
cmdq_flush(cmdq);
goto empty;
}
cmdq->cmd = TAILQ_NEXT(cmdq->cmd, qentry);
}
next = TAILQ_NEXT(cmdq->item, qentry);
TAILQ_REMOVE(&cmdq->queue, cmdq->item, qentry);
cmd_list_free(cmdq->item->cmdlist);
free(cmdq->item);
cmdq->item = next;
if (cmdq->item != NULL)
cmdq->cmd = TAILQ_FIRST(&cmdq->item->cmdlist->list);
} while (cmdq->item != NULL);
empty:
if (cmdq->client_exit > 0)
cmdq->client->flags |= CLIENT_EXIT;
if (cmdq->emptyfn != NULL)
cmdq->emptyfn(cmdq);
empty = 1;
out:
notify_enable();
cmdq_free(cmdq);
return (empty);
}
/* Flush command queue. */
static void
cmdq_flush(struct cmd_q *cmdq)
{
struct cmd_q_item *item, *item1;
TAILQ_FOREACH_SAFE(item, &cmdq->queue, qentry, item1) {
TAILQ_REMOVE(&cmdq->queue, item, qentry);
cmd_list_free(item->cmdlist);
free(item);
}
cmdq->item = NULL;
}