Return to notify.c CVS log

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When adding a list with multiple commands to the queue, the next item to
insert after needs to be the last one added, not the first. Reported by
Jason Kim in GitHub issue 2023.

/* $OpenBSD: notify.c,v 1.29 2019/12/19 09:22:33 nicm Exp $ */

/*
 * 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 <sys/queue.h>

#include <stdlib.h>
#include <string.h>

#include "tmux.h"

struct notify_entry {
	const char		*name;

	struct client		*client;
	struct session		*session;
	struct window		*window;
	int			 pane;

	struct cmd_find_state	 fs;
};

static void
notify_hook_formats(struct cmdq_item *item, struct session *s, struct window *w,
    int pane)
{
	if (s != NULL) {
		cmdq_format(item, "hook_session", "$%u", s->id);
		cmdq_format(item, "hook_session_name", "%s", s->name);
	}
	if (w != NULL) {
		cmdq_format(item, "hook_window", "@%u", w->id);
		cmdq_format(item, "hook_window_name", "%s", w->name);
	}
	if (pane != -1)
		cmdq_format(item, "hook_pane", "%%%d", pane);
}

static void
notify_insert_hook(struct cmdq_item *item, struct notify_entry *ne)
{
	struct cmd_find_state		 fs;
	struct options			*oo;
	struct cmdq_item		*new_item;
	struct session			*s = ne->session;
	struct window			*w = ne->window;
	struct options_entry		*o;
	struct options_array_item	*a;
	struct cmd_list			*cmdlist;

	log_debug("%s: %s", __func__, ne->name);

	cmd_find_clear_state(&fs, 0);
	if (cmd_find_empty_state(&ne->fs) || !cmd_find_valid_state(&ne->fs))
		cmd_find_from_nothing(&fs, 0);
	else
		cmd_find_copy_state(&fs, &ne->fs);

	if (fs.s == NULL)
		oo = global_s_options;
	else
		oo = fs.s->options;
	o = options_get(oo, ne->name);
	if (o == NULL)
		return;

	a = options_array_first(o);
	while (a != NULL) {
		cmdlist = options_array_item_value(a)->cmdlist;
		if (cmdlist == NULL) {
			a = options_array_next(a);
			continue;
		}

		new_item = cmdq_get_command(cmdlist, &fs, NULL, CMDQ_NOHOOKS);
		cmdq_format(new_item, "hook", "%s", ne->name);
		notify_hook_formats(new_item, s, w, ne->pane);
		item = cmdq_insert_after(item, new_item);

		a = options_array_next(a);
	}
}

static enum cmd_retval
notify_callback(struct cmdq_item *item, void *data)
{
	struct notify_entry	*ne = data;

	log_debug("%s: %s", __func__, ne->name);

	if (strcmp(ne->name, "pane-mode-changed") == 0)
		control_notify_pane_mode_changed(ne->pane);
	if (strcmp(ne->name, "window-layout-changed") == 0)
		control_notify_window_layout_changed(ne->window);
	if (strcmp(ne->name, "window-pane-changed") == 0)
		control_notify_window_pane_changed(ne->window);
	if (strcmp(ne->name, "window-unlinked") == 0)
		control_notify_window_unlinked(ne->session, ne->window);
	if (strcmp(ne->name, "window-linked") == 0)
		control_notify_window_linked(ne->session, ne->window);
	if (strcmp(ne->name, "window-renamed") == 0)
		control_notify_window_renamed(ne->window);
	if (strcmp(ne->name, "client-session-changed") == 0)
		control_notify_client_session_changed(ne->client);
	if (strcmp(ne->name, "session-renamed") == 0)
		control_notify_session_renamed(ne->session);
	if (strcmp(ne->name, "session-created") == 0)
		control_notify_session_created(ne->session);
	if (strcmp(ne->name, "session-closed") == 0)
		control_notify_session_closed(ne->session);
	if (strcmp(ne->name, "session-window-changed") == 0)
		control_notify_session_window_changed(ne->session);

	notify_insert_hook(item, ne);

	if (ne->client != NULL)
		server_client_unref(ne->client);
	if (ne->session != NULL)
		session_remove_ref(ne->session, __func__);
	if (ne->window != NULL)
		window_remove_ref(ne->window, __func__);

	if (ne->fs.s != NULL)
		session_remove_ref(ne->fs.s, __func__);

	free((void *)ne->name);
	free(ne);

	return (CMD_RETURN_NORMAL);
}

static void
notify_add(const char *name, struct cmd_find_state *fs, struct client *c,
    struct session *s, struct window *w, struct window_pane *wp)
{
	struct notify_entry	*ne;
	struct cmdq_item	*new_item;

	ne = xcalloc(1, sizeof *ne);
	ne->name = xstrdup(name);

	ne->client = c;
	ne->session = s;
	ne->window = w;

	if (wp != NULL)
		ne->pane = wp->id;
	else
		ne->pane = -1;

	if (c != NULL)
		c->references++;
	if (s != NULL)
		session_add_ref(s, __func__);
	if (w != NULL)
		window_add_ref(w, __func__);

	cmd_find_copy_state(&ne->fs, fs);
	if (ne->fs.s != NULL) /* cmd_find_valid_state needs session */
		session_add_ref(ne->fs.s, __func__);

	new_item = cmdq_get_callback(notify_callback, ne);
	cmdq_append(NULL, new_item);
}

void
notify_hook(struct cmdq_item *item, const char *name)
{
	struct notify_entry	ne;

	memset(&ne, 0, sizeof ne);

	ne.name = name;
	cmd_find_copy_state(&ne.fs, &item->target);

	ne.client = item->client;
	ne.session = item->target.s;
	ne.window = item->target.w;
	ne.pane = item->target.wp->id;

	notify_insert_hook(item, &ne);
}

void
notify_input(struct window_pane *wp, const u_char *buf, size_t len)
{
	struct client	*c;

	TAILQ_FOREACH(c, &clients, entry) {
		if (c->flags & CLIENT_CONTROL)
			control_notify_input(c, wp, buf, len);
	}
}

void
notify_client(const char *name, struct client *c)
{
	struct cmd_find_state	fs;

	cmd_find_from_client(&fs, c, 0);
	notify_add(name, &fs, c, NULL, NULL, NULL);
}

void
notify_session(const char *name, struct session *s)
{
	struct cmd_find_state	fs;

	if (session_alive(s))
		cmd_find_from_session(&fs, s, 0);
	else
		cmd_find_from_nothing(&fs, 0);
	notify_add(name, &fs, NULL, s, NULL, NULL);
}

void
notify_winlink(const char *name, struct winlink *wl)
{
	struct cmd_find_state	fs;

	cmd_find_from_winlink(&fs, wl, 0);
	notify_add(name, &fs, NULL, wl->session, wl->window, NULL);
}

void
notify_session_window(const char *name, struct session *s, struct window *w)
{
	struct cmd_find_state	fs;

	cmd_find_from_session_window(&fs, s, w, 0);
	notify_add(name, &fs, NULL, s, w, NULL);
}

void
notify_window(const char *name, struct window *w)
{
	struct cmd_find_state	fs;

	cmd_find_from_window(&fs, w, 0);
	notify_add(name, &fs, NULL, NULL, w, NULL);
}

void
notify_pane(const char *name, struct window_pane *wp)
{
	struct cmd_find_state	fs;

	cmd_find_from_pane(&fs, wp, 0);
	notify_add(name, &fs, NULL, NULL, NULL, wp);
}