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https://github.com/tmux/tmux.git
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ddc4512d2e
but there is also now a global command queue. Instead of command queues being dispatched on demand from wherever the command happens to be added, they are now all dispatched from the top level server loop. Command queues may now also include callbacks as well as commands, and items may be inserted after the current command as well as at the end. This all makes command queues significantly more predictable and easier to use, and avoids the complex multiple nested command queues used by source-file, if-shell and friends. A mass rename of struct cmdq to a better name (cmdq_item probably) is coming.
102 lines
2.6 KiB
C
102 lines
2.6 KiB
C
/* $OpenBSD$ */
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/*
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* Copyright (c) 2012 Nicholas Marriott <nicholas.marriott@gmail.com>
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* Copyright (c) 2012 George Nachman <tmux@georgester.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
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* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
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* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/types.h>
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#include <event.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include "tmux.h"
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/* Write a line. */
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void
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control_write(struct client *c, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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evbuffer_add_vprintf(c->stdout_data, fmt, ap);
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va_end(ap);
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evbuffer_add(c->stdout_data, "\n", 1);
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server_client_push_stdout(c);
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}
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/* Write a buffer, adding a terminal newline. Empties buffer. */
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void
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control_write_buffer(struct client *c, struct evbuffer *buffer)
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{
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evbuffer_add_buffer(c->stdout_data, buffer);
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evbuffer_add(c->stdout_data, "\n", 1);
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server_client_push_stdout(c);
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}
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/* Control error callback. */
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static enum cmd_retval
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control_error(struct cmd_q *cmdq, void *data)
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{
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struct client *c = cmdq->client;
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char *error = data;
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cmdq_guard(cmdq, "begin", 1);
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control_write(c, "parse error: %s", error);
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cmdq_guard(cmdq, "error", 1);
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free(error);
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return (CMD_RETURN_NORMAL);
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}
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/* Control input callback. Read lines and fire commands. */
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void
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control_callback(struct client *c, int closed, __unused void *data)
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{
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char *line, *cause;
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struct cmd_list *cmdlist;
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struct cmd *cmd;
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struct cmd_q *cmdq;
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if (closed)
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c->flags |= CLIENT_EXIT;
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for (;;) {
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line = evbuffer_readln(c->stdin_data, NULL, EVBUFFER_EOL_LF);
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if (line == NULL)
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break;
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if (*line == '\0') { /* empty line exit */
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c->flags |= CLIENT_EXIT;
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break;
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}
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if (cmd_string_parse(line, &cmdlist, NULL, 0, &cause) != 0) {
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cmdq = cmdq_get_callback(control_error, cause);
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cmdq_append(c, cmdq);
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} else {
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TAILQ_FOREACH(cmd, &cmdlist->list, qentry)
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cmd->flags |= CMD_CONTROL;
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cmdq = cmdq_get_command(cmdlist, NULL, NULL, 0);
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cmdq_append(c, cmdq);
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cmd_list_free(cmdlist);
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}
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free(line);
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}
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}
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