tmux 2.8.

that they are correctly translated into xterm(1)-style keys. GitHub
issue 1437.

CHANGES

@@ -1,9 +1,45 @@
+CHANGES FROM 2.7 to 2.8
+
+* Make display-panes block the client until a pane is chosen or it
+  times out.
+
+* Clear history on RIS like most other terminals do.
+
+* Add an "Any" key to run a command if a key is pressed that is not
+  bound in the current key table.
+
+* Expand formats in load-buffer and save-buffer.
+
+* Add a rectangle_toggle format.
+
+* Add set-hook -R to run a hook immediately.
+
+* Add README.ja.
+
+* Add pane focus hooks.
+
+* Allow any punctuation as separator for s/x/y not only /.
+
+* Improve resizing with the mouse (fix resizing the wrong pane in some
+  layouts, and allow resizing multiple panes at the same time).
+
+* Allow , and } to be escaped in formats as #, and #}.
+
+* Add KRB5CCNAME to update-environment.
+
+* Change meaning of -c to display-message so the client is used if it
+  matches the session given to -t.
+
+* Fixes to : form of SGR.
+
+* Add x and X to choose-tree to kill sessions, windows or panes.
+
 CHANGES FROM 2.6 TO 2.7
 
 * Remove EVENT_* variables from environment on platforms where tmux uses them
   so they do not pass on to panes.
 
-* Fixed for hooks at server exit.
+* Fixes for hooks at server exit.
 
 * Remove SGR 10 (was equivalent to SGR 0 but no other terminal seems to do
   this).

Makefile.am

@@ -6,7 +6,7 @@ CLEANFILES = tmux.1.mdoc tmux.1.man
 
 # Distribution tarball options.
 EXTRA_DIST = \
-	CHANGES README COPYING example_tmux.conf compat/*.[ch] \
+	CHANGES README README.ja COPYING example_tmux.conf compat/*.[ch] \
 	osdep-*.c mdoc2man.awk tmux.1
 
 # Preprocessor flags.

README

@@ -1,8 +1,8 @@
 Welcome to tmux!
 
-tmux is a "terminal multiplexer", it enables a number of terminals (or windows)
-to be accessed and controlled from a single terminal. tmux is intended to be a
-simple, modern, BSD-licensed alternative to programs such as GNU screen.
+tmux is a terminal multiplexer: it enables a number of terminals to be created,
+accessed, and controlled from a single screen. tmux may be detached from a
+screen and continue running in the background, then later reattached.
 
 This release runs on OpenBSD, FreeBSD, NetBSD, Linux, OS X and Solaris.
 

README.ja

@@ -0,0 +1,62 @@
+tmuxへようこそ!
+
+tmuxはターミナルマルチプレクサーです。複数のターミナルを一つのスクリーン内に作成し、操作することができます。
+バックグラウンドで処理を実行中に一度スクリーンから離れて後から復帰することも可能です。
+
+OpenBSD、FreeBSD、NetBSD、Linux、OS X、Solarisで実行できます。
+
+tmuxはlibevent 2.x.に依存します。 下記からダウンロードしてください。
+
+	http://libevent.org
+
+また、ncursesも必要です。こちらからどうぞ。
+
+	http://invisible-island.net/ncurses/
+
+tarballでのtmuxのビルドとインストール方法。
+
+	$ ./configure && make
+	$ sudo make install
+
+tmuxはutmp(5)をアップデートするためにutempterを使うことができます。もしインストール済みであればオプション「--enable-utempter」をつけて実行してください。
+
+リポジトリから最新バージョンを手に入れるためには下記を実行。
+
+	$ git clone https://github.com/tmux/tmux.git
+	$ cd tmux
+	$ sh autogen.sh
+	$ ./configure && make
+
+(ビルドのためにはlibevent、ncurses libraries、headersに加えて、C compiler、make、autoconf、automake、pkg-configが必要です。)
+
+詳しい情報はhttp://git-scm.comをご覧ください。修正はメール<tmux-users@googlegroups.com>宛、もしくはhttps://github.com/tmux/tmux/issuesにて受け付けています。
+
+tmuxのドキュメントについてはtmux.1マニュアルをご覧ください。こちらのコマンドで参照可能です。
+
+	$ nroff -mdoc tmux.1|less
+
+サンプル設定は本リポジトリのexample_tmux.confに
+また、bash-completionファイルは下記にあります。
+
+	https://github.com/imomaliev/tmux-bash-completion
+
+「-v」や「-vv」を指定することでデバッグモードでの起動が可能です。カレントディレクトリにサーバーやクライアントのログファイルが生成されます。
+
+議論やバグレポート用のメーリングリストにはこちらから参加可能です。
+
+	https://groups.google.com/forum/#!forum/tmux-users
+
+gitコミットについての連絡先
+
+	https://groups.google.com/forum/#!forum/tmux-git
+
+購読は<tmux-users+subscribe@googlegroups.com>までメールをお願いします。
+
+バグレポートや機能追加(特にコードへの貢献)は大歓迎です。こちらにご連絡ください。
+
+	tmux-users@googlegroups.com
+
+本ファイル、CHANGES、 FAQ、SYNCINGそしてTODOはISC licenseで保護されています。
+その他のファイルのライセンスや著作権については、ファイルの上部に明記されています。
+
+-- Nicholas Marriott <nicholas.marriott@gmail.com>

client.c

@@ -17,11 +17,10 @@
  */
 
 #include <sys/types.h>
-#include <sys/file.h>
 #include <sys/socket.h>
-#include <sys/stat.h>
 #include <sys/un.h>
 #include <sys/wait.h>
+#include <sys/file.h>
 
 #include <errno.h>
 #include <event.h>

cmd-attach-session.c

@@ -100,6 +100,7 @@ cmd_attach_session(struct cmdq_item *item, const char *tflag, int dflag,
 		s->cwd = format_single(item, cflag, c, s, wl, wp);
 	}
 
+	c->last_session = c->session;
 	if (c->session != NULL) {
 		if (dflag) {
 			TAILQ_FOREACH(c_loop, &clients, entry) {

cmd-display-message.c

@@ -53,7 +53,7 @@ static enum cmd_retval
 cmd_display_message_exec(struct cmd *self, struct cmdq_item *item)
 {
 	struct args		*args = self->args;
-	struct client		*c;
+	struct client		*c, *target_c;
 	struct session		*s = item->target.s;
 	struct winlink		*wl = item->target.wl;
 	struct window_pane	*wp = item->target.wp;
@@ -65,7 +65,6 @@ cmd_display_message_exec(struct cmd *self, struct cmdq_item *item)
 		cmdq_error(item, "only one of -F or argument must be given");
 		return (CMD_RETURN_ERROR);
 	}
-	c = cmd_find_client(item, args_get(args, 'c'), 1);
 
 	template = args_get(args, 'F');
 	if (args->argc != 0)
@@ -73,8 +72,19 @@ cmd_display_message_exec(struct cmd *self, struct cmdq_item *item)
 	if (template == NULL)
 		template = DISPLAY_MESSAGE_TEMPLATE;
 
+	/*
+	 * -c is intended to be the client where the message should be
+	 * displayed if -p is not given. But it makes sense to use it for the
+	 * formats too, assuming it matches the session. If it doesn't, use the
+	 * best client for the session.
+	 */
+	c = cmd_find_client(item, args_get(args, 'c'), 1);
+	if (c != NULL && c->session == s)
+		target_c = c;
+	else
+		target_c = cmd_find_best_client(s);
 	ft = format_create(item->client, item, FORMAT_NONE, 0);
-	format_defaults(ft, c, s, wl, wp);
+	format_defaults(ft, target_c, s, wl, wp);
 
 	msg = format_expand_time(ft, template, time(NULL));
 	if (args_has(self->args, 'p'))

cmd-display-panes.c

@@ -55,6 +55,7 @@ cmd_display_panes_exec(struct cmd *self, struct cmdq_item *item)
 
 	if ((c = cmd_find_client(item, args_get(args, 't'), 0)) == NULL)
 		return (CMD_RETURN_ERROR);
+	s = c->session;
 
 	if (c->identify_callback != NULL)
 		return (CMD_RETURN_NORMAL);
@@ -64,7 +65,7 @@ cmd_display_panes_exec(struct cmd *self, struct cmdq_item *item)
 		c->identify_callback_data = xstrdup(args->argv[0]);
 	else
 		c->identify_callback_data = xstrdup("select-pane -t '%%'");
-	s = c->session;
+	c->identify_callback_item = item;
 
 	if (args_has(args, 'd')) {
 		delay = args_strtonum(args, 'd', 0, UINT_MAX, &cause);
@@ -77,7 +78,7 @@ cmd_display_panes_exec(struct cmd *self, struct cmdq_item *item)
 		delay = options_get_number(s->options, "display-panes-time");
 	server_client_set_identify(c, delay);
 
-	return (CMD_RETURN_NORMAL);
+	return (CMD_RETURN_WAIT);
 }
 
 static enum cmd_retval
@@ -96,34 +97,36 @@ cmd_display_panes_callback(struct client *c, struct window_pane *wp)
 {
 	struct cmd_list		*cmdlist;
 	struct cmdq_item	*new_item;
-	char			*template, *cmd, *expanded, *cause;
+	char			*cmd, *expanded, *cause;
 
-	template = c->identify_callback_data;
 	if (wp == NULL)
 		goto out;
+
 	xasprintf(&expanded, "%%%u", wp->id);
-	cmd = cmd_template_replace(template, expanded, 1);
+	cmd = cmd_template_replace(c->identify_callback_data, expanded, 1);
 
 	cmdlist = cmd_string_parse(cmd, NULL, 0, &cause);
-	if (cmdlist == NULL) {
-		if (cause != NULL) {
-			new_item = cmdq_get_callback(cmd_display_panes_error,
-			    cause);
-		} else
-			new_item = NULL;
-	} else {
+	if (cmdlist == NULL && cause != NULL)
+		new_item = cmdq_get_callback(cmd_display_panes_error, cause);
+	else if (cmdlist == NULL)
+		new_item = NULL;
+	else {
 		new_item = cmdq_get_command(cmdlist, NULL, NULL, 0);
 		cmd_list_free(cmdlist);
 	}
 
 	if (new_item != NULL)
-		cmdq_append(c, new_item);
+		cmdq_insert_after(c->identify_callback_item, new_item);
 
 	free(cmd);
 	free(expanded);
 
 out:
+	c->identify_callback_item->flags &= ~CMDQ_WAITING;
+	c->identify_callback_item = NULL;
+
 	free(c->identify_callback_data);
 	c->identify_callback_data = NULL;
+
 	c->identify_callback = NULL;
 }

cmd-find.c

@@ -34,6 +34,7 @@ static int	cmd_find_best_winlink_with_window(struct cmd_find_state *);
 
 static const char *cmd_find_map_table(const char *[][2], const char *);
 
+static void	cmd_find_log_state(const char *, struct cmd_find_state *);
 static int	cmd_find_get_session(struct cmd_find_state *, const char *);
 static int	cmd_find_get_window(struct cmd_find_state *, const char *, int);
 static int	cmd_find_get_window_with_session(struct cmd_find_state *,
@@ -82,6 +83,7 @@ cmd_find_try_TMUX(struct client *c)
 	char			 tmp[256];
 	long long		 pid;
 	u_int			 session;
+	struct session		*s;
 
 	envent = environ_find(c->environ, "TMUX");
 	if (envent == NULL)
@@ -91,8 +93,13 @@ cmd_find_try_TMUX(struct client *c)
 		return (NULL);
 	if (pid != getpid())
 		return (NULL);
-	log_debug("client %p TMUX %s (session @%u)", c, envent->value, session);
-	return (session_find_by_id(session));
+	log_debug("%s: client %p TMUX %s (session $%u)", __func__, c,
+	    envent->value, session);
+
+	s = session_find_by_id(session);
+	if (s != NULL)
+		log_debug("%s: session $%u still exists", __func__, s->id);
+	return (s);
 }
 
 /* Find pane containing client if any. */
@@ -105,9 +112,11 @@ cmd_find_inside_pane(struct client *c)
 		return (NULL);
 
 	RB_FOREACH(wp, window_pane_tree, &all_window_panes) {
-		if (strcmp(wp->tty, c->ttyname) == 0)
+		if (wp->fd != -1 && strcmp(wp->tty, c->ttyname) == 0)
 			break;
 	}
+	if (wp != NULL)
+		log_debug("%s: got pane %%%u (%s)", __func__, wp->id, wp->tty);
 	return (wp);
 }
 
@@ -121,7 +130,7 @@ cmd_find_client_better(struct client *c, struct client *than)
 }
 
 /* Find best client for session. */
-static struct client *
+struct client *
 cmd_find_best_client(struct session *s)
 {
 	struct client	*c_loop, *c;
@@ -166,6 +175,8 @@ cmd_find_best_session(struct session **slist, u_int ssize, int flags)
 	struct session	 *s_loop, *s;
 	u_int		  i;
 
+	log_debug("%s: %u sessions to try", __func__, ssize);
+
 	s = NULL;
 	if (slist != NULL) {
 		for (i = 0; i < ssize; i++) {
@@ -189,6 +200,8 @@ cmd_find_best_session_with_window(struct cmd_find_state *fs)
 	u_int		  ssize;
 	struct session	 *s;
 
+	log_debug("%s: window is @%u", __func__, fs->w->id);
+
 	ssize = 0;
 	RB_FOREACH(s, sessions, &sessions) {
 		if (!session_has(s, fs->w))
@@ -210,7 +223,7 @@ fail:
 }
 
 /*
- * Find the best winlink for a window (the current if it contains the pane,
+ * Find the best winlink for a window (the current if it contains the window,
  * otherwise the first).
  */
 static int
@@ -218,6 +231,8 @@ cmd_find_best_winlink_with_window(struct cmd_find_state *fs)
 {
 	struct winlink	 *wl, *wl_loop;
 
+	log_debug("%s: window is @%u", __func__, fs->w->id);
+
 	wl = NULL;
 	if (fs->s->curw != NULL && fs->s->curw->window == fs->w)
 		wl = fs->s->curw;
@@ -436,15 +451,15 @@ cmd_find_get_window_with_session(struct cmd_find_state *fs, const char *window)
 	if (window[0] != '+' && window[0] != '-') {
 		idx = strtonum(window, 0, INT_MAX, &errstr);
 		if (errstr == NULL) {
-			if (fs->flags & CMD_FIND_WINDOW_INDEX) {
-				fs->idx = idx;
-				return (0);
-			}
 			fs->wl = winlink_find_by_index(&fs->s->windows, idx);
 			if (fs->wl != NULL) {
 				fs->w = fs->wl->window;
 				return (0);
 			}
+			if (fs->flags & CMD_FIND_WINDOW_INDEX) {
+				fs->idx = idx;
+				return (0);
+			}
 		}
 	}
 
@@ -701,11 +716,11 @@ cmd_find_copy_state(struct cmd_find_state *dst, struct cmd_find_state *src)
 }
 
 /* Log the result. */
-void
+static void
 cmd_find_log_state(const char *prefix, struct cmd_find_state *fs)
 {
 	if (fs->s != NULL)
-		log_debug("%s: s=$%u", prefix, fs->s->id);
+		log_debug("%s: s=$%u %s", prefix, fs->s->id, fs->s->name);
 	else
 		log_debug("%s: s=none", prefix);
 	if (fs->wl != NULL) {
@@ -894,6 +909,9 @@ cmd_find_from_client(struct cmd_find_state *fs, struct client *c, int flags)
 				break;
 		}
 		if (wl != NULL) {
+			log_debug("%s: session $%u has pane %%%u", __func__,
+			    s->id, wp->id);
+
 			fs->s = s;
 			fs->wl = s->curw; /* use current session */
 			fs->w = fs->wl->window;
@@ -901,6 +919,9 @@ cmd_find_from_client(struct cmd_find_state *fs, struct client *c, int flags)
 
 			cmd_find_log_state(__func__, fs);
 			return (0);
+		} else {
+			log_debug("%s: session $%u does not have pane %%%u",
+			    __func__, s->id, wp->id);
 		}
 	}
 
@@ -1141,7 +1162,8 @@ cmd_find_target(struct cmd_find_state *fs, struct cmdq_item *item,
 			/* This will fill in winlink and window. */
 			if (cmd_find_get_window_with_session(fs, window) != 0)
 				goto no_window;
-			fs->wp = fs->wl->window->active;
+			if (fs->wl != NULL) /* can be NULL if index only */
+				fs->wp = fs->wl->window->active;
 			goto found;
 		}
 
@@ -1181,7 +1203,8 @@ cmd_find_target(struct cmd_find_state *fs, struct cmdq_item *item,
 		/* This will fill in session, winlink and window. */
 		if (cmd_find_get_window(fs, window, window_only) != 0)
 			goto no_window;
-		fs->wp = fs->wl->window->active;
+		if (fs->wl != NULL) /* can be NULL if index only */
+			fs->wp = fs->wl->window->active;
 		goto found;
 	}
 

cmd-if-shell.c

@@ -73,14 +73,6 @@ cmd_if_shell_exec(struct cmd *self, struct cmdq_item *item)
 	struct session			*s = item->target.s;
 	struct winlink			*wl = item->target.wl;
 	struct window_pane		*wp = item->target.wp;
-	const char			*cwd;
-
-	if (item->client != NULL && item->client->session == NULL)
-		cwd = item->client->cwd;
-	else if (s != NULL)
-		cwd = s->cwd;
-	else
-		cwd = NULL;
 
 	shellcmd = format_single(item, args->argv[0], c, s, wl, wp);
 	if (args_has(args, 'F')) {
@@ -128,8 +120,8 @@ cmd_if_shell_exec(struct cmd *self, struct cmdq_item *item)
 		cdata->item = NULL;
 	memcpy(&cdata->mouse, &shared->mouse, sizeof cdata->mouse);
 
-	job_run(shellcmd, s, cwd, NULL, cmd_if_shell_callback,
-	    cmd_if_shell_free, cdata, 0);
+	job_run(shellcmd, s, server_client_get_cwd(item->client, s), NULL,
+	    cmd_if_shell_callback, cmd_if_shell_free, cdata, 0);
 	free(shellcmd);
 
 	if (args_has(args, 'b'))

cmd-kill-pane.c

@@ -47,9 +47,8 @@ cmd_kill_pane_exec(struct cmd *self, struct cmdq_item *item)
 	struct winlink		*wl = item->target.wl;
 	struct window_pane	*loopwp, *tmpwp, *wp = item->target.wp;
 
-	server_unzoom_window(wl->window);
-
 	if (args_has(self->args, 'a')) {
+		server_unzoom_window(wl->window);
 		TAILQ_FOREACH_SAFE(loopwp, &wl->window->panes, entry, tmpwp) {
 			if (loopwp == wp)
 				continue;
@@ -60,13 +59,6 @@ cmd_kill_pane_exec(struct cmd *self, struct cmdq_item *item)
 		return (CMD_RETURN_NORMAL);
 	}
 
-	if (window_count_panes(wl->window) == 1) {
-		server_kill_window(wl->window);
-		recalculate_sizes();
-	} else {
-		layout_close_pane(wp);
-		window_remove_pane(wl->window, wp);
-		server_redraw_window(wl->window);
-	}
+	server_kill_pane(wp);
 	return (CMD_RETURN_NORMAL);
 }

cmd-list-keys.c

@@ -75,10 +75,14 @@ cmd_list_keys_exec(struct cmd *self, struct cmdq_item *item)
 
 	repeat = 0;
 	tablewidth = keywidth = 0;
-	RB_FOREACH(table, key_tables, &key_tables) {
-		if (tablename != NULL && strcmp(table->name, tablename) != 0)
+	table = key_bindings_first_table ();
+	while (table != NULL) {
+		if (tablename != NULL && strcmp(table->name, tablename) != 0) {
+			table = key_bindings_next_table(table);
 			continue;
-		RB_FOREACH(bd, key_bindings, &table->key_bindings) {
+		}
+		bd = key_bindings_first(table);
+		while (bd != NULL) {
 			key = key_string_lookup_key(bd->key);
 
 			if (bd->flags & KEY_BINDING_REPEAT)
@@ -90,13 +94,20 @@ cmd_list_keys_exec(struct cmd *self, struct cmdq_item *item)
 			width = utf8_cstrwidth(key);
 			if (width > keywidth)
 				keywidth = width;
+
+			bd = key_bindings_next(table, bd);
 		}
+		table = key_bindings_next_table(table);
 	}
 
-	RB_FOREACH(table, key_tables, &key_tables) {
-		if (tablename != NULL && strcmp(table->name, tablename) != 0)
+	table = key_bindings_first_table ();
+	while (table != NULL) {
+		if (tablename != NULL && strcmp(table->name, tablename) != 0) {
+			table = key_bindings_next_table(table);
 			continue;
-		RB_FOREACH(bd, key_bindings, &table->key_bindings) {
+		}
+		bd = key_bindings_first(table);
+		while (bd != NULL) {
 			key = key_string_lookup_key(bd->key);
 
 			if (!repeat)
@@ -122,7 +133,9 @@ cmd_list_keys_exec(struct cmd *self, struct cmdq_item *item)
 			free(cp);
 
 			cmdq_print(item, "bind-key %s", tmp);
+			bd = key_bindings_next(table, bd);
 		}
+		table = key_bindings_next_table(table);
 	}
 
 	return (CMD_RETURN_NORMAL);

cmd-load-buffer.c

@@ -56,11 +56,14 @@ cmd_load_buffer_exec(struct cmd *self, struct cmdq_item *item)
 {
 	struct args			*args = self->args;
 	struct cmd_load_buffer_data	*cdata;
-	struct client			*c = item->client;
+	struct client			*c = cmd_find_client(item, NULL, 1);
+	struct session			*s = item->target.s;
+	struct winlink			*wl = item->target.wl;
+	struct window_pane		*wp = item->target.wp;
 	FILE				*f;
-	const char			*path, *bufname;
+	const char			*bufname;
 	char				*pdata = NULL, *new_pdata, *cause;
-	char				*file;
+	char				*path, *file;
 	size_t				 psize;
 	int				 ch, error;
 
@@ -68,8 +71,11 @@ cmd_load_buffer_exec(struct cmd *self, struct cmdq_item *item)
 	if (args_has(args, 'b'))
 		bufname = args_get(args, 'b');
 
-	path = args->argv[0];
+	path = format_single(item, args->argv[0], c, s, wl, wp);
 	if (strcmp(path, "-") == 0) {
+		free(path);
+		c = item->client;
+
 		cdata = xcalloc(1, sizeof *cdata);
 		cdata->item = item;
 
@@ -79,7 +85,7 @@ cmd_load_buffer_exec(struct cmd *self, struct cmdq_item *item)
 		error = server_set_stdin_callback(c, cmd_load_buffer_callback,
 		    cdata, &cause);
 		if (error != 0) {
-			cmdq_error(item, "%s: %s", path, cause);
+			cmdq_error(item, "-: %s", cause);
 			free(cause);
 			return (CMD_RETURN_ERROR);
 		}
@@ -87,6 +93,8 @@ cmd_load_buffer_exec(struct cmd *self, struct cmdq_item *item)
 	}
 
 	file = server_client_get_path(c, path);
+	free(path);
+
 	f = fopen(file, "rb");
 	if (f == NULL) {
 		cmdq_error(item, "%s: %s", file, strerror(errno));

cmd-new-session.c

@@ -156,10 +156,8 @@ cmd_new_session_exec(struct cmd *self, struct cmdq_item *item)
 	/* Get the new session working directory. */
 	if ((tmp = args_get(args, 'c')) != NULL)
 		cwd = format_single(item, tmp, c, NULL, NULL, NULL);
-	else if (c != NULL && c->session == NULL && c->cwd != NULL)
-		cwd = xstrdup(c->cwd);
 	else
-		cwd = xstrdup(".");
+		cwd = xstrdup(server_client_get_cwd(c, NULL));
 
 	/*
 	 * If this is a new client, check for nesting and save the termios
@@ -204,17 +202,29 @@ cmd_new_session_exec(struct cmd *self, struct cmdq_item *item)
 		sy = 24;
 	}
 	if ((is_control || detached) && args_has(args, 'x')) {
-		sx = strtonum(args_get(args, 'x'), 1, USHRT_MAX, &errstr);
-		if (errstr != NULL) {
-			cmdq_error(item, "width %s", errstr);
-			goto error;
+		tmp = args_get(args, 'x');
+		if (strcmp(tmp, "-") == 0) {
+			if (c != NULL)
+				sx = c->tty.sx;
+		} else {
+			sx = strtonum(tmp, 1, USHRT_MAX, &errstr);
+			if (errstr != NULL) {
+				cmdq_error(item, "width %s", errstr);
+				goto error;
+			}
 		}
 	}
 	if ((is_control || detached) && args_has(args, 'y')) {
-		sy = strtonum(args_get(args, 'y'), 1, USHRT_MAX, &errstr);
-		if (errstr != NULL) {
-			cmdq_error(item, "height %s", errstr);
-			goto error;
+		tmp = args_get(args, 'y');
+		if (strcmp(tmp, "-") == 0) {
+			if (c != NULL)
+				sy = c->tty.sy;
+		} else {
+			sy = strtonum(tmp, 1, USHRT_MAX, &errstr);
+			if (errstr != NULL) {
+				cmdq_error(item, "height %s", errstr);
+				goto error;
+			}
 		}
 	}
 	if (sx == 0)

cmd-new-window.c

@@ -63,7 +63,7 @@ cmd_new_window_exec(struct cmd *self, struct cmdq_item *item)
 	struct environ_entry	*envent;
 	struct cmd_find_state	 fs;
 
-	if (args_has(args, 'a')) {
+	if (args_has(args, 'a') && wl != NULL) {
 		if ((idx = winlink_shuffle_up(s, wl)) == -1) {
 			cmdq_error(item, "no free window indexes");
 			return (CMD_RETURN_ERROR);
@@ -95,17 +95,14 @@ cmd_new_window_exec(struct cmd *self, struct cmdq_item *item)
 
 	if ((tmp = args_get(args, 'c')) != NULL)
 		cwd = format_single(item, tmp, c, s, NULL, NULL);
-	else if (item->client != NULL && item->client->session == NULL)
-		cwd = xstrdup(item->client->cwd);
 	else
-		cwd = xstrdup(s->cwd);
+		cwd = xstrdup(server_client_get_cwd(item->client, s));
 
 	if ((tmp = args_get(args, 'n')) != NULL)
 		name = format_single(item, tmp, c, s, NULL, NULL);
 	else
 		name = NULL;
 
-	wl = NULL;
 	if (idx != -1)
 		wl = winlink_find_by_index(&s->windows, idx);
 	if (wl != NULL && args_has(args, 'k')) {

cmd-rename-session.c

@@ -47,7 +47,7 @@ static enum cmd_retval
 cmd_rename_session_exec(struct cmd *self, struct cmdq_item *item)
 {
 	struct args		*args = self->args;
-	struct client		*c = cmd_find_client(item, NULL, 0);
+	struct client		*c = cmd_find_client(item, NULL, 1);
 	struct session		*s = item->target.s;
 	char			*newname;
 

cmd-resize-pane.c

@@ -129,14 +129,21 @@ static void
 cmd_resize_pane_mouse_update(struct client *c, struct mouse_event *m)
 {
 	struct winlink		*wl;
-	struct window_pane	*loop, *wp_x, *wp_y;
-	u_int			 y, ly, x, lx, sx, sy, ex, ey;
+	struct window		*w;
+	u_int			 y, ly, x, lx;
+	static const int         offsets[][2] = {
+	    { 0, 0 }, { 0, 1 }, { 1, 0 }, { 0, -1 }, { -1, 0 },
+	};
+	struct layout_cell	*cells[nitems(offsets)], *lc;
+	u_int			 ncells = 0, i, j, resizes = 0;
+	enum layout_type	 type;
 
 	wl = cmd_mouse_window(m, NULL);
 	if (wl == NULL) {
 		c->tty.mouse_drag_update = NULL;
 		return;
 	}
+	w = wl->window;
 
 	y = m->y; x = m->x;
 	if (m->statusat == 0 && y > 0)
@@ -149,37 +156,37 @@ cmd_resize_pane_mouse_update(struct client *c, struct mouse_event *m)
 	else if (m->statusat > 0 && ly >= (u_int)m->statusat)
 		ly = m->statusat - 1;
 
-	wp_x = wp_y = NULL;
-	TAILQ_FOREACH(loop, &wl->window->panes, entry) {
-		if (!window_pane_visible(loop))
+	for (i = 0; i < nitems(cells); i++) {
+		lc = layout_search_by_border(w->layout_root, lx + offsets[i][0],
+		    ly + offsets[i][1]);
+		if (lc == NULL)
 			continue;
 
-		sx = loop->xoff;
-		if (sx != 0)
-			sx--;
-		ex = loop->xoff + loop->sx;
+		for (j = 0; j < ncells; j++) {
+			if (cells[j] == lc) {
+				lc = NULL;
+				break;
+			}
+		}
+		if (lc == NULL)
+			continue;
 
-		sy = loop->yoff;
-		if (sy != 0)
-			sy--;
-		ey = loop->yoff + loop->sy;
-
-		if ((lx == sx || lx == ex) &&
-		    (ly >= sy && ly <= ey) &&
-		    (wp_x == NULL || loop->sy > wp_x->sy))
-			wp_x = loop;
-		if ((ly == sy || ly == ey) &&
-		    (lx >= sx && lx <= ex) &&
-		    (wp_y == NULL || loop->sx > wp_y->sx))
-			wp_y = loop;
+		cells[ncells] = lc;
+		ncells++;
 	}
-	if (wp_x == NULL && wp_y == NULL) {
-		c->tty.mouse_drag_update = NULL;
+	if (ncells == 0)
 		return;
+
+	for (i = 0; i < ncells; i++) {
+		type = cells[i]->parent->type;
+		if (y != ly && type == LAYOUT_TOPBOTTOM) {
+			layout_resize_layout(w, cells[i], type, y - ly, 0);
+			resizes++;
+		} else if (x != lx && type == LAYOUT_LEFTRIGHT) {
+			layout_resize_layout(w, cells[i], type, x - lx, 0);
+			resizes++;
+		}
 	}
-	if (wp_x != NULL)
-		layout_resize_pane(wp_x, LAYOUT_LEFTRIGHT, x - lx, 0);
-	if (wp_y != NULL)
-		layout_resize_pane(wp_y, LAYOUT_TOPBOTTOM, y - ly, 0);
-	server_redraw_window(wl->window);
+	if (resizes != 0)
+		server_redraw_window(w);
 }

cmd-run-shell.c

@@ -90,14 +90,6 @@ cmd_run_shell_exec(struct cmd *self, struct cmdq_item *item)
 	struct session			*s = item->target.s;
 	struct winlink			*wl = item->target.wl;
 	struct window_pane		*wp = item->target.wp;
-	const char			*cwd;
-
-	if (item->client != NULL && item->client->session == NULL)
-		cwd = item->client->cwd;
-	else if (s != NULL)
-		cwd = s->cwd;
-	else
-		cwd = NULL;
 
 	cdata = xcalloc(1, sizeof *cdata);
 	cdata->cmd = format_single(item, args->argv[0], c, s, wl, wp);
@@ -110,8 +102,8 @@ cmd_run_shell_exec(struct cmd *self, struct cmdq_item *item)
 	if (!args_has(args, 'b'))
 		cdata->item = item;
 
-	job_run(cdata->cmd, s, cwd, NULL, cmd_run_shell_callback,
-	    cmd_run_shell_free, cdata, 0);
+	job_run(cdata->cmd, s, server_client_get_cwd(item->client, s), NULL,
+	    cmd_run_shell_callback, cmd_run_shell_free, cdata, 0);
 
 	if (args_has(args, 'b'))
 		return (CMD_RETURN_NORMAL);

cmd-save-buffer.c

@@ -59,11 +59,13 @@ static enum cmd_retval
 cmd_save_buffer_exec(struct cmd *self, struct cmdq_item *item)
 {
 	struct args		*args = self->args;
-	struct client		*c = item->client;
+	struct client		*c = cmd_find_client(item, NULL, 1);
+	struct session		*s = item->target.s;
+	struct winlink		*wl = item->target.wl;
+	struct window_pane	*wp = item->target.wp;
 	struct paste_buffer	*pb;
-	const char		*path, *bufname, *bufdata, *start, *end;
-	const char		*flags;
-	char			*msg, *file;
+	const char		*bufname, *bufdata, *start, *end, *flags;
+	char			*msg, *path, *file;
 	size_t			 size, used, msglen, bufsize;
 	FILE			*f;
 
@@ -83,10 +85,12 @@ cmd_save_buffer_exec(struct cmd *self, struct cmdq_item *item)
 	bufdata = paste_buffer_data(pb, &bufsize);
 
 	if (self->entry == &cmd_show_buffer_entry)
-		path = "-";
+		path = xstrdup("-");
 	else
-		path = args->argv[0];
+		path = format_single(item, args->argv[0], c, s, wl, wp);
 	if (strcmp(path, "-") == 0) {
+		free(path);
+		c = item->client;
 		if (c == NULL) {
 			cmdq_error(item, "can't write to stdout");
 			return (CMD_RETURN_ERROR);
@@ -101,6 +105,8 @@ cmd_save_buffer_exec(struct cmd *self, struct cmdq_item *item)
 		flags = "ab";
 
 	file = server_client_get_path(c, path);
+	free(path);
+
 	f = fopen(file, flags);
 	if (f == NULL) {
 		cmdq_error(item, "%s: %s", file, strerror(errno));

cmd-select-layout.c

@@ -136,6 +136,7 @@ cmd_select_layout_exec(struct cmd *self, struct cmdq_item *item)
 changed:
 	free(oldlayout);
 	server_redraw_window(w);
+	notify_window("window-layout-changed", w);
 	return (CMD_RETURN_NORMAL);
 
 error:

cmd-select-pane.c

@@ -69,6 +69,11 @@ cmd_select_pane_exec(struct cmd *self, struct cmdq_item *item)
 
 	if (self->entry == &cmd_last_pane_entry || args_has(args, 'l')) {
 		lastwp = w->last;
+		if (lastwp == NULL && window_count_panes(w) == 2) {
+			lastwp = TAILQ_PREV(w->active, window_panes, entry);
+			if (lastwp == NULL)
+				lastwp = TAILQ_NEXT(w->active, entry);
+		}
 		if (lastwp == NULL) {
 			cmdq_error(item, "no last pane");
 			return (CMD_RETURN_ERROR);
@@ -157,6 +162,7 @@ cmd_select_pane_exec(struct cmd *self, struct cmdq_item *item)
 		screen_set_title(&wp->base, pane_title);
 		server_status_window(wp->window);
 		free(pane_title);
+		return (CMD_RETURN_NORMAL);
 	}
 
 	if (wp == w->active)

cmd-send-keys.c

@@ -61,7 +61,7 @@ cmd_send_keys_inject(struct client *c, struct cmdq_item *item, key_code key)
 	struct window_pane	*wp = item->target.wp;
 	struct session		*s = item->target.s;
 	struct key_table	*table;
-	struct key_binding	*bd, bd_find;
+	struct key_binding	*bd;
 
 	if (wp->mode == NULL || wp->mode->key_table == NULL) {
 		if (options_get_number(wp->window->options, "xterm-keys"))
@@ -71,8 +71,7 @@ cmd_send_keys_inject(struct client *c, struct cmdq_item *item, key_code key)
 	}
 	table = key_bindings_get_table(wp->mode->key_table(wp), 1);
 
-	bd_find.key = (key & ~KEYC_XTERM);
-	bd = RB_FIND(key_bindings, &table->key_bindings, &bd_find);
+	bd = key_bindings_get(table, key & ~KEYC_XTERM);
 	if (bd != NULL) {
 		table->references++;
 		key_bindings_dispatch(bd, item, c, NULL, &item->target);

cmd-set-hook.c

@@ -33,8 +33,8 @@ const struct cmd_entry cmd_set_hook_entry = {
 	.name = "set-hook",
 	.alias = NULL,
 
-	.args = { "gt:u", 1, 2 },
-	.usage = "[-gu] " CMD_TARGET_SESSION_USAGE " hook-name [command]",
+	.args = { "gRt:u", 1, 2 },
+	.usage = "[-gRu] " CMD_TARGET_SESSION_USAGE " hook-name [command]",
 
 	.target = { 't', CMD_FIND_SESSION, CMD_FIND_CANFAIL },
 
@@ -101,18 +101,21 @@ cmd_set_hook_exec(struct cmd *self, struct cmdq_item *item)
 	else
 		cmd = args->argv[1];
 
+	if (cmd != NULL && (args_has(args, 'R') || args_has(args, 'u'))) {
+		cmdq_error(item, "no command allowed");
+		return (CMD_RETURN_ERROR);
+	}
+	if (args_has(args, 'R')) {
+		notify_hook(item, name);
+		return (CMD_RETURN_NORMAL);
+	}
 	if (args_has(args, 'u')) {
-		if (cmd != NULL) {
-			cmdq_error(item, "command passed to unset hook: %s",
-			    name);
-			return (CMD_RETURN_ERROR);
-		}
 		hooks_remove(hooks, name);
 		return (CMD_RETURN_NORMAL);
 	}
 
 	if (cmd == NULL) {
-		cmdq_error(item, "no command to set hook: %s", name);
+		cmdq_error(item, "no command given");
 		return (CMD_RETURN_ERROR);
 	}
 	cmdlist = cmd_string_parse(cmd, NULL, 0, &cause);

cmd-source-file.c

@@ -60,7 +60,7 @@ cmd_source_file_exec(struct cmd *self, struct cmdq_item *item)
 	if (*path == '/')
 		pattern = xstrdup(path);
 	else {
-		utf8_stravis(&tmp, server_client_get_cwd(c), VIS_GLOB);
+		utf8_stravis(&tmp, server_client_get_cwd(c, NULL), VIS_GLOB);
 		xasprintf(&pattern, "%s/%s", tmp, path);
 		free(tmp);
 	}

cmd-split-window.c

@@ -87,10 +87,8 @@ cmd_split_window_exec(struct cmd *self, struct cmdq_item *item)
 
 	if ((tmp = args_get(args, 'c')) != NULL)
 		cwd = format_single(item, tmp, c, s, NULL, NULL);
-	else if (item->client != NULL && item->client->session == NULL)
-		cwd = xstrdup(item->client->cwd);
 	else
-		cwd = xstrdup(s->cwd);
+		cwd = xstrdup(server_client_get_cwd(item->client, s));
 
 	type = LAYOUT_TOPBOTTOM;
 	if (args_has(args, 'h'))

cmd.c

@@ -200,6 +200,15 @@ const struct cmd_entry *cmd_table[] = {
 	NULL
 };
 
+void
+cmd_log_argv(int argc, char **argv, const char *prefix)
+{
+	int	i;
+
+	for (i = 0; i < argc; i++)
+		log_debug("%s: argv[%d]=%s", prefix, i, argv[i]);
+}
+
 int
 cmd_pack_argv(int argc, char **argv, char *buf, size_t len)
 {
@@ -208,6 +217,7 @@ cmd_pack_argv(int argc, char **argv, char *buf, size_t len)
 
 	if (argc == 0)
 		return (0);
+	cmd_log_argv(argc, argv, __func__);
 
 	*buf = '\0';
 	for (i = 0; i < argc; i++) {
@@ -240,9 +250,11 @@ cmd_unpack_argv(char *buf, size_t len, int argc, char ***argv)
 
 		arglen = strlen(buf) + 1;
 		(*argv)[i] = xstrdup(buf);
+
 		buf += arglen;
 		len -= arglen;
 	}
+	cmd_log_argv(argc, *argv, __func__);
 
 	return (0);
 }
@@ -401,6 +413,7 @@ retry:
 		xasprintf(cause, "unknown command: %s", name);
 		return (NULL);
 	}
+	cmd_log_argv(argc, argv, entry->name);
 
 	args = args_parse(entry->args.template, argc, argv);
 	if (args == NULL)

compat/imsg-buffer.c

@@ -1,4 +1,4 @@
-/*	$OpenBSD: imsg-buffer.c,v 1.10 2017/04/11 09:57:19 reyk Exp $	*/
+/*	$OpenBSD: imsg-buffer.c,v 1.11 2017/12/14 09:27:44 kettenis Exp $	*/
 
 /*
  * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
@@ -29,9 +29,9 @@
 #include "compat.h"
 #include "imsg.h"
 
-int	ibuf_realloc(struct ibuf *, size_t);
-void	ibuf_enqueue(struct msgbuf *, struct ibuf *);
-void	ibuf_dequeue(struct msgbuf *, struct ibuf *);
+static int	ibuf_realloc(struct ibuf *, size_t);
+static void	ibuf_enqueue(struct msgbuf *, struct ibuf *);
+static void	ibuf_dequeue(struct msgbuf *, struct ibuf *);
 
 struct ibuf *
 ibuf_open(size_t len)
@@ -67,7 +67,7 @@ ibuf_dynamic(size_t len, size_t max)
 	return (buf);
 }
 
-int
+static int
 ibuf_realloc(struct ibuf *buf, size_t len)
 {
 	u_char	*b;
@@ -289,14 +289,14 @@ again:
 	return (1);
 }
 
-void
+static void
 ibuf_enqueue(struct msgbuf *msgbuf, struct ibuf *buf)
 {
 	TAILQ_INSERT_TAIL(&msgbuf->bufs, buf, entry);
 	msgbuf->queued++;
 }
 
-void
+static void
 ibuf_dequeue(struct msgbuf *msgbuf, struct ibuf *buf)
 {
 	TAILQ_REMOVE(&msgbuf->bufs, buf, entry);

compat/imsg.c

@@ -1,4 +1,4 @@
-/*	$OpenBSD: imsg.c,v 1.15 2017/04/11 09:57:19 reyk Exp $	*/
+/*	$OpenBSD: imsg.c,v 1.16 2017/12/14 09:27:44 kettenis Exp $	*/
 
 /*
  * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
@@ -30,7 +30,7 @@
 
 int	 imsg_fd_overhead = 0;
 
-int	 imsg_get_fd(struct imsgbuf *);
+static int	 imsg_get_fd(struct imsgbuf *);
 
 void
 imsg_init(struct imsgbuf *ibuf, int fd)
@@ -266,7 +266,7 @@ imsg_free(struct imsg *imsg)
 	freezero(imsg->data, imsg->hdr.len - IMSG_HEADER_SIZE);
 }
 
-int
+static int
 imsg_get_fd(struct imsgbuf *ibuf)
 {
 	int		 fd;

configure.ac

@@ -1,6 +1,6 @@
 # configure.ac
 
-AC_INIT(tmux, 2.7-rc)
+AC_INIT(tmux, 2.8)
 AC_PREREQ([2.60])
 
 AC_CONFIG_AUX_DIR(etc)
@@ -610,7 +610,16 @@ case "$host_os" in
 	*solaris*)
 		AC_MSG_RESULT(sunos)
 		PLATFORM=sunos
-		MANFORMAT=man
+		case `/usr/bin/nroff --version 2>&1` in
+			*GNU*)
+				# Solaris 11.4 and later use GNU groff.
+				MANFORMAT=mdoc
+				;;
+			*)
+				# Solaris 2.0 to 11.3 use AT&T nroff.
+				MANFORMAT=man
+				;;
+		esac
 		;;
 	*hpux*)
 		AC_MSG_RESULT(hpux)

format.c

@@ -19,6 +19,7 @@
 #include <sys/types.h>
 #include <sys/wait.h>
 
+#include <ctype.h>
 #include <errno.h>
 #include <fnmatch.h>
 #include <libgen.h>
@@ -562,11 +563,11 @@ format_cb_history_bytes(struct format_tree *ft, struct format_entry *fe)
 
 	size = 0;
 	for (i = 0; i < gd->hsize; i++) {
-		gl = &gd->linedata[i];
+		gl = grid_get_line(gd, i);
 		size += gl->cellsize * sizeof *gl->celldata;
 		size += gl->extdsize * sizeof *gl->extddata;
 	}
-	size += gd->hsize * sizeof *gd->linedata;
+	size += gd->hsize * sizeof *gl;
 
 	xasprintf(&fe->value, "%llu", size);
 }
@@ -853,18 +854,22 @@ found:
 	return (copy);
 }
 
-/* Skip until comma. */
-static char *
-format_skip(char *s)
+/* Skip until end. */
+static const char *
+format_skip(const char *s, char end)
 {
 	int	brackets = 0;
 
 	for (; *s != '\0'; s++) {
-		if (*s == '{')
+		if (*s == '#' && s[1] == '{')
 			brackets++;
+		if (*s == '#' && strchr(",#{}", s[1]) != NULL) {
+			s++;
+			continue;
+		}
 		if (*s == '}')
 			brackets--;
-		if (*s == ',' && brackets == 0)
+		if (*s == end && brackets == 0)
 			break;
 	}
 	if (*s == '\0')
@@ -878,7 +883,7 @@ format_choose(char *s, char **left, char **right)
 {
 	char	*cp;
 
-	cp = format_skip(s);
+	cp = (char *)format_skip(s, ',');
 	if (cp == NULL)
 		return (-1);
 	*cp = '\0';
@@ -903,11 +908,12 @@ format_replace(struct format_tree *ft, const char *key, size_t keylen,
     char **buf, size_t *len, size_t *off)
 {
 	struct window_pane	*wp = ft->wp;
-	char			*copy, *copy0, *endptr, *ptr, *found, *new;
+	char			*copy, *copy0, *endptr, *ptr, *found, *new, sep;
 	char			*value, *from = NULL, *to = NULL, *left, *right;
 	size_t			 valuelen, newlen, fromlen, tolen, used;
 	long			 limit = 0;
 	int			 modifiers = 0, compare = 0, search = 0;
+	int			 literal = 0;
 
 	/* Make a copy of the key. */
 	copy0 = copy = xmalloc(keylen + 1);
@@ -916,6 +922,12 @@ format_replace(struct format_tree *ft, const char *key, size_t keylen,
 
 	/* Is there a length limit or whatnot? */
 	switch (copy[0]) {
+	case 'l':
+		if (copy[1] != ':')
+			break;
+		literal = 1;
+		copy += 2;
+		break;
 	case 'm':
 		if (copy[1] != ':')
 			break;
@@ -980,20 +992,21 @@ format_replace(struct format_tree *ft, const char *key, size_t keylen,
 		copy += 2;
 		break;
 	case 's':
-		if (copy[1] != '/')
+		sep = copy[1];
+		if (sep == ':' || !ispunct((u_char)sep))
 			break;
 		from = copy + 2;
-		for (copy = from; *copy != '\0' && *copy != '/'; copy++)
+		for (copy = from; *copy != '\0' && *copy != sep; copy++)
 			/* nothing */;
-		if (copy[0] != '/' || copy == from) {
+		if (copy[0] != sep || copy == from) {
 			copy = copy0;
 			break;
 		}
 		copy[0] = '\0';
 		to = copy + 1;
-		for (copy = to; *copy != '\0' && *copy != '/'; copy++)
+		for (copy = to; *copy != '\0' && *copy != sep; copy++)
 			/* nothing */;
-		if (copy[0] != '/' || copy[1] != ':') {
+		if (copy[0] != sep || copy[1] != ':') {
 			copy = copy0;
 			break;
 		}
@@ -1004,6 +1017,12 @@ format_replace(struct format_tree *ft, const char *key, size_t keylen,
 		break;
 	}
 
+	/* Is this a literal string? */
+	if (literal) {
+		value = xstrdup(copy);
+		goto done;
+	}
+
 	/* Is this a comparison or a conditional? */
 	if (search) {
 		/* Search in pane. */
@@ -1035,14 +1054,24 @@ format_replace(struct format_tree *ft, const char *key, size_t keylen,
 		free(left);
 	} else if (*copy == '?') {
 		/* Conditional: check first and choose second or third. */
-		ptr = format_skip(copy);
+		ptr = (char *)format_skip(copy, ',');
 		if (ptr == NULL)
 			goto fail;
 		*ptr = '\0';
 
 		found = format_find(ft, copy + 1, modifiers);
-		if (found == NULL)
+		if (found == NULL) {
+			/*
+			 * If the conditional not found, try to expand it. If
+			 * the expansion doesn't have any effect, then assume
+			 * false.
+			 */
 			found = format_expand(ft, copy + 1);
+			if (strcmp(found, copy + 1) == 0) {
+				free(found);
+				found = xstrdup("");
+			}
+		}
 		if (format_choose(ptr + 1, &left, &right) != 0)
 			goto fail;
 
@@ -1097,6 +1126,7 @@ format_replace(struct format_tree *ft, const char *key, size_t keylen,
 		value = new;
 	}
 
+done:
 	/* Expand the buffer and copy in the value. */
 	valuelen = strlen(value);
 	while (*len - *off < valuelen + 1) {
@@ -1195,14 +1225,8 @@ format_expand(struct format_tree *ft, const char *fmt)
 			fmt += n + 1;
 			continue;
 		case '{':
-			brackets = 1;
-			for (ptr = fmt; *ptr != '\0'; ptr++) {
-				if (*ptr == '{')
-					brackets++;
-				if (*ptr == '}' && --brackets == 0)
-					break;
-			}
-			if (*ptr != '}' || brackets != 0)
+			ptr = format_skip(fmt - 2, '}');
+			if (ptr == NULL)
 				break;
 			n = ptr - fmt;
 
@@ -1210,12 +1234,14 @@ format_expand(struct format_tree *ft, const char *fmt)
 				break;
 			fmt += n + 1;
 			continue;
+		case '}':
 		case '#':
+		case ',':
 			while (len - off < 2) {
 				buf = xreallocarray(buf, 2, len);
 				len *= 2;
 			}
-			buf[off++] = '#';
+			buf[off++] = ch;
 			continue;
 		default:
 			s = NULL;
@@ -1270,6 +1296,9 @@ void
 format_defaults(struct format_tree *ft, struct client *c, struct session *s,
     struct winlink *wl, struct window_pane *wp)
 {
+	if (c != NULL && s != NULL && c->session != s)
+		log_debug("%s: session does not match", __func__);
+
 	format_add(ft, "session_format", "%d", s != NULL);
 	format_add(ft, "window_format", "%d", wl != NULL);
 	format_add(ft, "pane_format", "%d", wp != NULL);

grid-view.c

@@ -64,7 +64,7 @@ grid_view_clear_history(struct grid *gd, u_int bg)
 	/* Find the last used line. */
 	last = 0;
 	for (yy = 0; yy < gd->sy; yy++) {
-		gl = &gd->linedata[grid_view_y(gd, yy)];
+		gl = grid_get_line(gd, grid_view_y(gd, yy));
 		if (gl->cellused != 0)
 			last = yy + 1;
 	}

grid.c

@@ -145,6 +145,20 @@ grid_extended_cell(struct grid_line *gl, struct grid_cell_entry *gce,
 	return (gcp);
 }
 
+/* Get line data. */
+struct grid_line *
+grid_get_line(struct grid *gd, u_int line)
+{
+	return (&gd->linedata[line]);
+}
+
+/* Adjust number of lines. */
+void
+grid_adjust_lines(struct grid *gd, u_int lines)
+{
+	gd->linedata = xreallocarray(gd->linedata, lines, sizeof *gd->linedata);
+}
+
 /* Copy default into a cell. */
 static void
 grid_clear_cell(struct grid *gd, u_int px, u_int py, u_int bg)
@@ -166,10 +180,10 @@ grid_clear_cell(struct grid *gd, u_int px, u_int py, u_int bg)
 
 /* Check grid y position. */
 static int
-grid_check_y(struct grid *gd, u_int py)
+grid_check_y(struct grid *gd, const char* from, u_int py)
 {
 	if (py >= gd->hsize + gd->sy) {
-		log_debug("y out of range: %u", py);
+		log_debug("%s: y out of range: %u", from, py);
 		return (-1);
 	}
 	return (0);
@@ -272,6 +286,15 @@ grid_compare(struct grid *ga, struct grid *gb)
 	return (0);
 }
 
+/* Trim lines from the history. */
+static void
+grid_trim_history(struct grid *gd, u_int ny)
+{
+	grid_free_lines(gd, 0, ny);
+	memmove(&gd->linedata[0], &gd->linedata[ny],
+	    (gd->hsize + gd->sy - ny) * (sizeof *gd->linedata));
+}
+
 /*
  * Collect lines from the history if at the limit. Free the top (oldest) 10%
  * and shift up.
@@ -294,9 +317,7 @@ grid_collect_history(struct grid *gd)
 	 * Free the lines from 0 to ny then move the remaining lines over
 	 * them.
 	 */
-	grid_free_lines(gd, 0, ny);
-	memmove(&gd->linedata[0], &gd->linedata[ny],
-	    (gd->hsize + gd->sy - ny) * (sizeof *gd->linedata));
+	grid_trim_history(gd, ny);
 
 	gd->hsize -= ny;
 	if (gd->hscrolled > gd->hsize)
@@ -326,9 +347,7 @@ grid_scroll_history(struct grid *gd, u_int bg)
 void
 grid_clear_history(struct grid *gd)
 {
-	grid_free_lines(gd, 0, gd->hsize);
-	memmove(&gd->linedata[0], &gd->linedata[gd->hsize],
-	    gd->sy * (sizeof *gd->linedata));
+	grid_trim_history(gd, gd->hsize);
 
 	gd->hscrolled = 0;
 	gd->hsize = 0;
@@ -407,7 +426,7 @@ grid_empty_line(struct grid *gd, u_int py, u_int bg)
 const struct grid_line *
 grid_peek_line(struct grid *gd, u_int py)
 {
-	if (grid_check_y(gd, py) != 0)
+	if (grid_check_y(gd, __func__, py) != 0)
 		return (NULL);
 	return (&gd->linedata[py]);
 }
@@ -441,7 +460,8 @@ grid_get_cell1(struct grid_line *gl, u_int px, struct grid_cell *gc)
 void
 grid_get_cell(struct grid *gd, u_int px, u_int py, struct grid_cell *gc)
 {
-	if (grid_check_y(gd, py) != 0 || px >= gd->linedata[py].cellsize) {
+	if (grid_check_y(gd, __func__, py) != 0 ||
+	    px >= gd->linedata[py].cellsize) {
 		memcpy(gc, &grid_default_cell, sizeof *gc);
 		return;
 	}
@@ -455,7 +475,7 @@ grid_set_cell(struct grid *gd, u_int px, u_int py, const struct grid_cell *gc)
 	struct grid_line	*gl;
 	struct grid_cell_entry	*gce;
 
-	if (grid_check_y(gd, py) != 0)
+	if (grid_check_y(gd, __func__, py) != 0)
 		return;
 
 	grid_expand_line(gd, py, px + 1, 8);
@@ -481,7 +501,7 @@ grid_set_cells(struct grid *gd, u_int px, u_int py, const struct grid_cell *gc,
 	struct grid_cell	*gcp;
 	u_int			 i;
 
-	if (grid_check_y(gd, py) != 0)
+	if (grid_check_y(gd, __func__, py) != 0)
 		return;
 
 	grid_expand_line(gd, py, px + slen, 8);
@@ -514,9 +534,9 @@ grid_clear(struct grid *gd, u_int px, u_int py, u_int nx, u_int ny, u_int bg)
 		return;
 	}
 
-	if (grid_check_y(gd, py) != 0)
+	if (grid_check_y(gd, __func__, py) != 0)
 		return;
-	if (grid_check_y(gd, py + ny - 1) != 0)
+	if (grid_check_y(gd, __func__, py + ny - 1) != 0)
 		return;
 
 	for (yy = py; yy < py + ny; yy++) {
@@ -543,9 +563,9 @@ grid_clear_lines(struct grid *gd, u_int py, u_int ny, u_int bg)
 	if (ny == 0)
 		return;
 
-	if (grid_check_y(gd, py) != 0)
+	if (grid_check_y(gd, __func__, py) != 0)
 		return;
-	if (grid_check_y(gd, py + ny - 1) != 0)
+	if (grid_check_y(gd, __func__, py + ny - 1) != 0)
 		return;
 
 	for (yy = py; yy < py + ny; yy++) {
@@ -563,13 +583,13 @@ grid_move_lines(struct grid *gd, u_int dy, u_int py, u_int ny, u_int bg)
 	if (ny == 0 || py == dy)
 		return;
 
-	if (grid_check_y(gd, py) != 0)
+	if (grid_check_y(gd, __func__, py) != 0)
 		return;
-	if (grid_check_y(gd, py + ny - 1) != 0)
+	if (grid_check_y(gd, __func__, py + ny - 1) != 0)
 		return;
-	if (grid_check_y(gd, dy) != 0)
+	if (grid_check_y(gd, __func__, dy) != 0)
 		return;
-	if (grid_check_y(gd, dy + ny - 1) != 0)
+	if (grid_check_y(gd, __func__, dy + ny - 1) != 0)
 		return;
 
 	/* Free any lines which are being replaced. */
@@ -603,7 +623,7 @@ grid_move_cells(struct grid *gd, u_int dx, u_int px, u_int py, u_int nx,
 	if (nx == 0 || px == dx)
 		return;
 
-	if (grid_check_y(gd, py) != 0)
+	if (grid_check_y(gd, __func__, py) != 0)
 		return;
 	gl = &gd->linedata[py];
 
@@ -983,9 +1003,9 @@ static void
 grid_reflow_join(struct grid *target, struct grid *gd, u_int sx, u_int yy,
     u_int width, u_int *cy, int already)
 {
-	struct grid_line	*gl, *from;
+	struct grid_line	*gl, *from = NULL;
 	struct grid_cell	 gc;
-	u_int			 lines, want, left, i, to, line;
+	u_int			 lines, left, i, to, line, want = 0;
 	u_int			 at;
 	int			 wrapped = 1;
 
@@ -1010,7 +1030,7 @@ grid_reflow_join(struct grid *target, struct grid *gd, u_int sx, u_int yy,
 		 * If this is now the last line, there is nothing more to be
 		 * done.
 		 */
-		if (yy + lines == gd->hsize + gd->sy)
+		if (yy + 1 + lines == gd->hsize + gd->sy)
 			break;
 		line = yy + 1 + lines;
 
@@ -1020,6 +1040,7 @@ grid_reflow_join(struct grid *target, struct grid *gd, u_int sx, u_int yy,
 		if (gd->linedata[line].cellused == 0) {
 			if (!wrapped)
 				break;
+			lines++;
 			continue;
 		}
 

input.c

@@ -30,7 +30,7 @@
 /*
  * Based on the description by Paul Williams at:
  *
- * http://vt100.net/emu/dec_ansi_parser
+ * https://vt100.net/emu/dec_ansi_parser
  *
  * With the following changes:
  *
@@ -1188,6 +1188,7 @@ input_esc_dispatch(struct input_ctx *ictx)
 		window_pane_reset_palette(ictx->wp);
 		input_reset_cell(ictx);
 		screen_write_reset(sctx);
+		screen_write_clearhistory(sctx);
 		break;
 	case INPUT_ESC_IND:
 		screen_write_linefeed(sctx, 0, ictx->cell.cell.bg);
@@ -1845,10 +1846,12 @@ input_csi_dispatch_sgr_colon(struct input_ctx *ictx, u_int i)
 
 	ptr = copy = xstrdup(s);
 	while ((out = strsep(&ptr, ":")) != NULL) {
-		p[n++] = strtonum(out, 0, INT_MAX, &errstr);
-		if (errstr != NULL || n == nitems(p)) {
-			free(copy);
-			return;
+		if (*out != '\0') {
+			p[n++] = strtonum(out, 0, INT_MAX, &errstr);
+			if (errstr != NULL || n == nitems(p)) {
+				free(copy);
+				return;
+			}
 		}
 		log_debug("%s: %u = %d", __func__, n - 1, p[n - 1]);
 	}
@@ -1856,16 +1859,21 @@ input_csi_dispatch_sgr_colon(struct input_ctx *ictx, u_int i)
 
 	if (n == 0 || (p[0] != 38 && p[0] != 48))
 		return;
-	switch (p[1]) {
+	if (p[1] == -1)
+		i = 2;
+	else
+		i = 1;
+	switch (p[i]) {
 	case 2:
-		if (n != 5)
+		if (n < i + 4)
 			break;
-		input_csi_dispatch_sgr_rgb_do(ictx, p[0], p[2], p[3], p[4]);
+		input_csi_dispatch_sgr_rgb_do(ictx, p[0], p[i + 1], p[i + 2],
+		    p[i + 3]);
 		break;
 	case 5:
-		if (n != 3)
+		if (n < i + 2)
 			break;
-		input_csi_dispatch_sgr_256_do(ictx, p[0], p[2]);
+		input_csi_dispatch_sgr_256_do(ictx, p[0], p[i + 1]);
 		break;
 	}
 }
@@ -2227,7 +2235,7 @@ bad:
 	free(copy);
 }
 
-/* Handle the OSC 10 sequence for setting background colour. */
+/* Handle the OSC 10 sequence for setting foreground colour. */
 static void
 input_osc_10(struct window_pane *wp, const char *p)
 {

key-bindings.c

@@ -24,17 +24,19 @@
 
 #include "tmux.h"
 
-RB_GENERATE(key_bindings, key_binding, entry, key_bindings_cmp);
-RB_GENERATE(key_tables, key_table, entry, key_table_cmp);
-struct key_tables key_tables = RB_INITIALIZER(&key_tables);
+static int key_bindings_cmp(struct key_binding *, struct key_binding *);
+RB_GENERATE_STATIC(key_bindings, key_binding, entry, key_bindings_cmp);
+static int key_table_cmp(struct key_table *, struct key_table *);
+RB_GENERATE_STATIC(key_tables, key_table, entry, key_table_cmp);
+static struct key_tables key_tables = RB_INITIALIZER(&key_tables);
 
-int
-key_table_cmp(struct key_table *e1, struct key_table *e2)
+static int
+key_table_cmp(struct key_table *table1, struct key_table *table2)
 {
-	return (strcmp(e1->name, e2->name));
+	return (strcmp(table1->name, table2->name));
 }
 
-int
+static int
 key_bindings_cmp(struct key_binding *bd1, struct key_binding *bd2)
 {
 	if (bd1->key < bd2->key)
@@ -64,6 +66,18 @@ key_bindings_get_table(const char *name, int create)
 	return (table);
 }
 
+struct key_table *
+key_bindings_first_table(void)
+{
+	return (RB_MIN(key_tables, &key_tables));
+}
+
+struct key_table *
+key_bindings_next_table(struct key_table *table)
+{
+	return (RB_NEXT(key_tables, &key_tables, table));
+}
+
 void
 key_bindings_unref_table(struct key_table *table)
 {
@@ -83,6 +97,27 @@ key_bindings_unref_table(struct key_table *table)
 	free(table);
 }
 
+struct key_binding *
+key_bindings_get(struct key_table *table, key_code key)
+{
+	struct key_binding	bd;
+
+	bd.key = key;
+	return (RB_FIND(key_bindings, &table->key_bindings, &bd));
+}
+
+struct key_binding *
+key_bindings_first(struct key_table *table)
+{
+	return (RB_MIN(key_bindings, &table->key_bindings));
+}
+
+struct key_binding *
+key_bindings_next(__unused struct key_table *table, struct key_binding *bd)
+{
+	return (RB_NEXT(key_bindings, &table->key_bindings, bd));
+}
+
 void
 key_bindings_add(const char *name, key_code key, int repeat,
     struct cmd_list *cmdlist)

key-string.c

@@ -166,9 +166,11 @@ key_string_lookup_string(const char *string)
 	enum utf8_state		 more;
 	wchar_t			 wc;
 
-	/* Is this no key? */
+	/* Is this no key or any key? */
 	if (strcasecmp(string, "None") == 0)
 		return (KEYC_NONE);
+	if (strcasecmp(string, "Any") == 0)
+		return (KEYC_ANY);
 
 	/* Is this a hexadecimal value? */
 	if (string[0] == '0' && string[1] == 'x') {
@@ -251,6 +253,8 @@ key_string_lookup_key(key_code key)
 	/* Handle special keys. */
 	if (key == KEYC_UNKNOWN)
 		return ("Unknown");
+	if (key == KEYC_ANY)
+		return ("Any");
 	if (key == KEYC_FOCUS_IN)
 		return ("FocusIn");
 	if (key == KEYC_FOCUS_OUT)

layout.c

@@ -127,6 +127,42 @@ layout_print_cell(struct layout_cell *lc, const char *hdr, u_int n)
 	}
 }
 
+struct layout_cell *
+layout_search_by_border(struct layout_cell *lc, u_int x, u_int y)
+{
+	struct layout_cell	*lcchild, *last = NULL;
+
+	TAILQ_FOREACH(lcchild, &lc->cells, entry) {
+		if (x >= lcchild->xoff && x < lcchild->xoff + lcchild->sx &&
+		    y >= lcchild->yoff && y < lcchild->yoff + lcchild->sy) {
+			/* Inside the cell - recurse. */
+			return (layout_search_by_border(lcchild, x, y));
+		}
+
+		if (last == NULL) {
+			last = lcchild;
+			continue;
+		}
+
+		switch (lc->type) {
+		case LAYOUT_LEFTRIGHT:
+			if (x < lcchild->xoff && x >= last->xoff + last->sx)
+				return (last);
+			break;
+		case LAYOUT_TOPBOTTOM:
+			if (y < lcchild->yoff && y >= last->yoff + last->sy)
+				return (last);
+			break;
+		case LAYOUT_WINDOWPANE:
+			break;
+		}
+
+		last = lcchild;
+	}
+
+	return (NULL);
+}
+
 void
 layout_set_size(struct layout_cell *lc, u_int sx, u_int sy, u_int xoff,
     u_int yoff)
@@ -550,29 +586,11 @@ layout_resize_pane_to(struct window_pane *wp, enum layout_type type,
 	layout_resize_pane(wp, type, change, 1);
 }
 
-/* Resize a single pane within the layout. */
 void
-layout_resize_pane(struct window_pane *wp, enum layout_type type, int change,
-    int opposite)
+layout_resize_layout(struct window *w, struct layout_cell *lc,
+    enum layout_type type, int change, int opposite)
 {
-	struct window		*w = wp->window;
-	struct layout_cell	*lc, *lcparent;
-	int			 needed, size;
-
-	lc = wp->layout_cell;
-
-	/* Find next parent of the same type. */
-	lcparent = lc->parent;
-	while (lcparent != NULL && lcparent->type != type) {
-		lc = lcparent;
-		lcparent = lc->parent;
-	}
-	if (lcparent == NULL)
-		return;
-
-	/* If this is the last cell, move back one. */
-	if (lc == TAILQ_LAST(&lcparent->cells, layout_cells))
-		lc = TAILQ_PREV(lc, layout_cells, entry);
+	int	needed, size;
 
 	/* Grow or shrink the cell. */
 	needed = change;
@@ -591,9 +609,34 @@ layout_resize_pane(struct window_pane *wp, enum layout_type type, int change,
 	}
 
 	/* Fix cell offsets. */
-	layout_fix_offsets(wp->window->layout_root);
-	layout_fix_panes(wp->window, wp->window->sx, wp->window->sy);
-	notify_window("window-layout-changed", wp->window);
+	layout_fix_offsets(w->layout_root);
+	layout_fix_panes(w, w->sx, w->sy);
+	notify_window("window-layout-changed", w);
+}
+
+/* Resize a single pane within the layout. */
+void
+layout_resize_pane(struct window_pane *wp, enum layout_type type, int change,
+    int opposite)
+{
+	struct layout_cell	*lc, *lcparent;
+
+	lc = wp->layout_cell;
+
+	/* Find next parent of the same type. */
+	lcparent = lc->parent;
+	while (lcparent != NULL && lcparent->type != type) {
+		lc = lcparent;
+		lcparent = lc->parent;
+	}
+	if (lcparent == NULL)
+		return;
+
+	/* If this is the last cell, move back one. */
+	if (lc == TAILQ_LAST(&lcparent->cells, layout_cells))
+		lc = TAILQ_PREV(lc, layout_cells, entry);
+
+	layout_resize_layout(wp->window, lc, type, change, opposite);
 }
 
 /* Helper function to grow pane. */

mode-tree.c

@@ -192,7 +192,7 @@ mode_tree_clear_tagged(struct mode_tree_list *mtl)
 	}
 }
 
-void
+static void
 mode_tree_up(struct mode_tree_data *mtd, int wrap)
 {
 	if (mtd->current == 0) {

notify.c

@@ -35,7 +35,7 @@ struct notify_entry {
 };
 
 static void
-notify_hook(struct cmdq_item *item, struct notify_entry *ne)
+notify_hook1(struct cmdq_item *item, struct notify_entry *ne)
 {
 	struct cmd_find_state	 fs;
 	struct hook		*hook;
@@ -101,7 +101,7 @@ notify_callback(struct cmdq_item *item, void *data)
 	if (strcmp(ne->name, "session-window-changed") == 0)
 		control_notify_session_window_changed(ne->session);
 
-	notify_hook(item, ne);
+	notify_hook1(item, ne);
 
 	if (ne->client != NULL)
 		server_client_unref(ne->client);
@@ -153,6 +153,24 @@ notify_add(const char *name, struct cmd_find_state *fs, struct client *c,
 	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_hook1(item, &ne);
+}
+
 void
 notify_input(struct window_pane *wp, struct evbuffer *input)
 {

options-table.c

@@ -513,8 +513,8 @@ const struct options_table_entry options_table[] = {
 	{ .name = "update-environment",
 	  .type = OPTIONS_TABLE_ARRAY,
 	  .scope = OPTIONS_TABLE_SESSION,
-	  .default_str = "DISPLAY SSH_ASKPASS SSH_AUTH_SOCK SSH_AGENT_PID "
-			 "SSH_CONNECTION WINDOWID XAUTHORITY"
+	  .default_str = "DISPLAY KRB5CCNAME SSH_ASKPASS SSH_AUTH_SOCK "
+	  		 "SSH_AGENT_PID SSH_CONNECTION WINDOWID XAUTHORITY"
 	},
 
 	{ .name = "visual-activity",

regress/format-strings.sh

@@ -0,0 +1,183 @@
+#!/bin/sh
+
+# Tests of formats as described in tmux(1) FORMATS
+
+PATH=/bin:/usr/bin
+TERM=screen
+
+[ -z "$TEST_TMUX" ] && TEST_TMUX=$(readlink -f ../tmux)
+TMUX="$TEST_TMUX -Ltest"
+
+# test_format $format $expected_result
+test_format()
+{
+	fmt="$1"
+	exp="$2"
+
+	out=$($TMUX display-message -p "$fmt")
+
+	if [ "$out" != "$exp" ]; then
+		echo "Format test failed for '$fmt'."
+		echo "Expected: '$exp'"
+		echo "But got   '$out'"
+		exit 1
+	fi
+}
+
+# test_conditional_with_pane_in_mode $format $exp1 $exp2
+#
+# Tests the format string $format to yield $exp1 if #{pane_in_mode} is true and
+# $exp2 when #{pane_in_mode} is false.
+test_conditional_with_pane_in_mode()
+{
+	fmt="$1"
+	exp_true="$2"
+	exp_false="$3"
+
+	$TMUX copy-mode # enter copy mode
+	test_format "$fmt" "$exp_true"
+	$TMUX send-keys -X cancel # leave copy mode
+	test_format "$fmt" "$exp_false"
+}
+
+# test_conditional_with_session_name #format $exp_summer $exp_winter
+#
+# Tests the format string $format to yield $exp_summer if the session name is
+# 'Summer' and $exp_winter if the session name is 'Winter'.
+test_conditional_with_session_name()
+{
+	fmt="$1"
+	exp_summer="$2"
+	exp_winter="$3"
+
+	$TMUX rename-session "Summer"
+	test_format "$fmt" "$exp_summer"
+	$TMUX rename-session "Winter"
+	test_format "$fmt" "$exp_winter"
+	$TMUX rename-session "Summer" # restore default
+}
+
+
+$TMUX kill-server 2>/dev/null
+$TMUX -f/dev/null new-session -d || exit 1
+$TMUX rename-session "Summer" || exit 1 # used later in conditionals
+
+# Plain string without substitutions et al
+test_format "abc xyz" "abc xyz"
+
+# Test basic escapes for "#", "{", "#{" "}", "#}", ","
+test_format "##" "#"
+test_format "#," ","
+test_format "{" "{"
+test_format "##{" "#{"
+test_format "#}" "}"
+test_format "###}" "#}" # not a "basic" one but interesting nevertheless
+
+# Simple expansion
+test_format "#{pane_in_mode}" "0"
+
+# Simple conditionals
+test_conditional_with_pane_in_mode "#{?pane_in_mode,abc,xyz}" "abc" "xyz"
+
+# Expansion in conditionals
+test_conditional_with_pane_in_mode "#{?pane_in_mode,#{session_name},xyz}" "Summer" "xyz"
+
+# Basic escapes in conditionals
+# First argument
+test_conditional_with_pane_in_mode "#{?pane_in_mode,##,xyz}" "#" "xyz"
+test_conditional_with_pane_in_mode "#{?pane_in_mode,#,,xyz}" "," "xyz"
+test_conditional_with_pane_in_mode "#{?pane_in_mode,{,xyz}" "{" "xyz"
+test_conditional_with_pane_in_mode "#{?pane_in_mode,##{,xyz}" "#{" "xyz"
+test_conditional_with_pane_in_mode "#{?pane_in_mode,#},xyz}" "}" "xyz"
+# not a "basic" one but interesting nevertheless
+test_conditional_with_pane_in_mode "#{?pane_in_mode,###},xyz}" "#}" "xyz"
+# Second argument
+test_conditional_with_pane_in_mode "#{?pane_in_mode,abc,##}" "abc" "#"
+test_conditional_with_pane_in_mode "#{?pane_in_mode,abc,#,}" "abc" ","
+test_conditional_with_pane_in_mode "#{?pane_in_mode,abc,{}" "abc" "{"
+test_conditional_with_pane_in_mode "#{?pane_in_mode,abc,##{}" "abc" "#{"
+test_conditional_with_pane_in_mode "#{?pane_in_mode,abc,#}}" "abc" "}"
+# not a "basic" one but interesting nevertheless
+test_conditional_with_pane_in_mode "#{?pane_in_mode,abc,###}}" "abc" "#}"
+# mixed
+test_conditional_with_pane_in_mode "#{?pane_in_mode,{,#}}" "{" "}"
+test_conditional_with_pane_in_mode "#{?pane_in_mode,#},{}" "}" "{"
+test_conditional_with_pane_in_mode "#{?pane_in_mode,##{,###}}" "#{" "#}"
+test_conditional_with_pane_in_mode "#{?pane_in_mode,###},##{}" "#}" "#{"
+
+# Conditionals split on the second comma (this is not documented)
+test_conditional_with_pane_in_mode "#{?pane_in_mode,abc,xyz,bonus}" "abc" "xyz,bonus"
+
+# Curly brackets {...} do not capture a comma inside of conditionals as the
+# conditional ends on the first '}'
+test_conditional_with_pane_in_mode "#{?pane_in_mode,{abc,xyz},bonus}" "{abc,bonus}" "xyz,bonus}"
+
+# Substitutions '#{...}' capture the comma
+# invalid format: #{abc,xyz} is not a known variable name.
+#test_conditional_with_pane_in_mode "#{?pane_in_mode,#{abc,xyz},bonus}" "" "bonus"
+
+# Parenthesis (...) do not captura a comma
+test_conditional_with_pane_in_mode "#{?pane_in_mode,(abc,xyz),bonus}" "(abc" "xyz),bonus"
+test_conditional_with_pane_in_mode "#{?pane_in_mode,(abc#,xyz),bonus}" "(abc,xyz)" "bonus"
+
+# Brackets [...] do not captura a comma
+test_conditional_with_pane_in_mode "#{?pane_in_mode,[abc,xyz],bonus}" "[abc" "xyz],bonus"
+test_conditional_with_pane_in_mode "#{?pane_in_mode,[abc#,xyz],bonus}" "[abc,xyz]" "bonus"
+
+
+# Escape comma inside of #(...)
+# Note: #() commands are run asynchronous and are substituted with result of the
+# *previous* run or a placeholder (like "<'echo ,' not ready") if the command
+# has not been run before. The format is updated as soon as the command
+# finishes. As we are printing the message only once it never gets updated
+# and the displayed message is "<'echo ,' not ready>"
+test_format "#{?pane_in_mode,#(echo #,),xyz}" "xyz"
+test_conditional_with_pane_in_mode "#{?pane_in_mode,#(echo #,),xyz}" "<'echo ,' not ready>" "xyz"
+# This caching does not work :-(
+#$TMUX display-message -p "#(echo #,)" > /dev/null
+#test_conditional_with_pane_in_mode "#{?pane_in_mode,#(echo #,),xyz}" "," "xyz"
+#test_conditional_with_pane_in_mode "#{?pane_in_mode,#(echo #,),xyz}" "," "xyz"
+
+# invalid format: '#(' is not closed in the first argument of #{?,,}.
+#test_conditional_with_pane_in_mode "#{?pane_in_mode,#(echo ,),xyz}" "" "),xyz"
+
+# Escape comma inside of #[...]
+test_conditional_with_pane_in_mode "#{?pane_in_mode,#[fg=default#,bg=default]abc,xyz}" "#[fg=default,bg=default]abc" "xyz"
+# invalid format: '#[' is not closed in the first argument of #{?,,}
+#test_conditional_with_pane_in_mode "#{?pane_in_mode,#[fg=default,bg=default]abc,xyz}" "" "bg=default]abc,xyz"
+
+# Conditionals with comparison
+test_conditional_with_session_name "#{?#{==:#{session_name},Summer},abc,xyz}" "abc" "xyz"
+# Conditionals with comparison and escaped commas
+$TMUX rename-session ","
+test_format "#{?#{==:#,,#{session_name}},abc,xyz}" "abc"
+$TMUX rename-session "Summer" # reset to default
+
+# Conditional in conditional
+test_conditional_with_pane_in_mode "#{?pane_in_mode,#{?#{==:#{session_name},Summer},ABC,XYZ},xyz}" "ABC" "xyz"
+test_conditional_with_session_name "#{?pane_in_mode,#{?#{==:#{session_name},Summer},ABC,XYZ},xyz}" "xyz" "xyz"
+
+test_conditional_with_pane_in_mode "#{?pane_in_mode,abc,#{?#{==:#{session_name},Summer},ABC,XYZ}}" "abc" "ABC"
+test_conditional_with_session_name "#{?pane_in_mode,abc,#{?#{==:#{session_name},Summer},ABC,XYZ}}" "ABC" "XYZ"
+
+# Some fancy stackings
+test_conditional_with_pane_in_mode "#{?#{==:#{?pane_in_mode,#{session_name},#(echo Spring)},Summer},abc,xyz}" "abc" "xyz"
+
+
+
+# Format test for the literal option
+# Note: The behavior for #{l:...} with escapes is sometimes weird as #{l:...}
+# respects the escapes.
+test_format "#{l:#{}}" "#{}"
+test_format "#{l:#{pane_in_mode}}" "#{pane_in_mode}"
+test_format "#{l:#{?pane_in_mode,#{?#{==:#{session_name},Summer},ABC,XYZ},xyz}}" "#{?pane_in_mode,#{?#{==:#{session_name},Summer},ABC,XYZ},xyz}"
+
+# With escapes (which escape but are returned literally)
+test_format "#{l:##{}" "##{"
+test_format "#{l:#{#}}}" "#{#}}"
+
+# Invalid formats:
+#test_format "#{l:#{}" ""
+#test_format "#{l:#{#}}" ""
+
+exit 0

screen-redraw.c

@@ -23,6 +23,18 @@
 
 #include "tmux.h"
 
+struct screen_redraw_ctx {
+	struct client	*c;
+
+	u_int		 lines;
+	int		 top;
+
+	int		 pane_status;
+
+	u_int		 sx;
+	u_int		 sy;
+};
+
 static int	screen_redraw_cell_border1(struct window_pane *, u_int, u_int);
 static int	screen_redraw_cell_border(struct client *, u_int, u_int);
 static int	screen_redraw_check_cell(struct client *, u_int, u_int, int,
@@ -34,11 +46,11 @@ static int 	screen_redraw_make_pane_status(struct client *, struct window *,
 		    struct window_pane *);
 static void	screen_redraw_draw_pane_status(struct client *, int);
 
-static void	screen_redraw_draw_borders(struct client *, int, u_int, u_int);
-static void	screen_redraw_draw_panes(struct client *, u_int, u_int);
-static void	screen_redraw_draw_status(struct client *, u_int, u_int);
-static void	screen_redraw_draw_number(struct client *, struct window_pane *,
-		    u_int, u_int);
+static void	screen_redraw_draw_borders(struct screen_redraw_ctx *);
+static void	screen_redraw_draw_panes(struct screen_redraw_ctx *);
+static void	screen_redraw_draw_status(struct screen_redraw_ctx *);
+static void	screen_redraw_draw_number(struct screen_redraw_ctx *,
+		    struct window_pane *);
 
 #define CELL_INSIDE 0
 #define CELL_LEFTRIGHT 1
@@ -375,42 +387,44 @@ void
 screen_redraw_screen(struct client *c, int draw_panes, int draw_status,
     int draw_borders)
 {
-	struct options		*oo = c->session->options;
-	struct tty		*tty = &c->tty;
-	struct window		*w = c->session->curw->window;
-	struct options		*wo = w->options;
-	u_int			 top, lines;
-	int	 		 position, pane_status;
+	struct options			*oo = c->session->options;
+	struct tty			*tty = &c->tty;
+	struct window			*w = c->session->curw->window;
+	struct options			*wo = w->options;
+	struct screen_redraw_ctx	 ctx;
 
 	if (c->flags & CLIENT_SUSPENDED)
 		return;
 
+	memset(&ctx, 0, sizeof ctx);
+	ctx.c = c;
+
 	if (c->flags & CLIENT_STATUSOFF)
-		lines = 0;
+		ctx.lines = 0;
 	else
-		lines = status_line_size(c->session);
+		ctx.lines = status_line_size(c->session);
 	if (c->message_string != NULL || c->prompt_string != NULL)
-		lines = (lines == 0) ? 1 : lines;
+		ctx.lines = (ctx.lines == 0) ? 1 : ctx.lines;
 
-	position = options_get_number(oo, "status-position");
-	if (lines != 0 && position == 0)
-		top = 1;
-	else
-		top = 0;
+	if (ctx.lines != 0 && options_get_number(oo, "status-position") == 0)
+		ctx.top = 1;
+	ctx.pane_status = options_get_number(wo, "pane-border-status");
 
-	if (lines == 0)
+	ctx.sx = tty->sx;
+	ctx.sy = tty->sy - ctx.lines;
+
+	if (ctx.lines == 0)
 		draw_status = 0;
 
 	if (draw_borders) {
-		pane_status = options_get_number(wo, "pane-border-status");
-		screen_redraw_draw_borders(c, pane_status, lines, top);
-		if (pane_status != CELL_STATUS_OFF)
-			screen_redraw_draw_pane_status(c, pane_status);
+		if (ctx.pane_status != CELL_STATUS_OFF)
+			screen_redraw_draw_pane_status(c, ctx.pane_status);
+		screen_redraw_draw_borders(&ctx);
 	}
 	if (draw_panes)
-		screen_redraw_draw_panes(c, lines, top);
+		screen_redraw_draw_panes(&ctx);
 	if (draw_status)
-		screen_redraw_draw_status(c, lines, top);
+		screen_redraw_draw_status(&ctx);
 	tty_reset(tty);
 }
 
@@ -435,25 +449,65 @@ screen_redraw_pane(struct client *c, struct window_pane *wp)
 	tty_reset(&c->tty);
 }
 
+/* Draw a border cell. */
+static void
+screen_redraw_draw_borders_cell(struct screen_redraw_ctx *ctx, u_int x, u_int y,
+    int small, u_int msgx, u_int msgy, struct grid_cell *m_active_gc,
+    struct grid_cell *active_gc, struct grid_cell *m_other_gc,
+    struct grid_cell *other_gc)
+{
+	struct client           *c = ctx->c;
+	struct session          *s = c->session;
+	struct window           *w = s->curw->window;
+	struct tty              *tty = &c->tty;
+	struct window_pane      *wp;
+	struct window_pane      *active = w->active;
+	struct window_pane      *marked = marked_pane.wp;
+	u_int                    type;
+	int                      flag, pane_status = ctx->pane_status;
+
+	type = screen_redraw_check_cell(c, x, y, pane_status, &wp);
+	if (type == CELL_INSIDE)
+		return;
+	if (type == CELL_OUTSIDE && small && x > msgx && y == msgy)
+		return;
+	flag = screen_redraw_check_is(x, y, type, pane_status, w, active, wp);
+
+	if (server_is_marked(s, s->curw, marked_pane.wp) &&
+	    screen_redraw_check_is(x, y, type, pane_status, w, marked, wp)) {
+		if (flag)
+			tty_attributes(tty, m_active_gc, NULL);
+		else
+			tty_attributes(tty, m_other_gc, NULL);
+	} else if (flag)
+		tty_attributes(tty, active_gc, NULL);
+	else
+		tty_attributes(tty, other_gc, NULL);
+	if (ctx->top)
+		tty_cursor(tty, x, ctx->lines + y);
+	else
+		tty_cursor(tty, x, y);
+	tty_putc(tty, CELL_BORDERS[type]);
+}
+
 /* Draw the borders. */
 static void
-screen_redraw_draw_borders(struct client *c, int pane_status, u_int lines,
-    u_int top)
+screen_redraw_draw_borders(struct screen_redraw_ctx *ctx)
 {
+	struct client		*c = ctx->c;
 	struct session		*s = c->session;
 	struct window		*w = s->curw->window;
 	struct options		*oo = w->options;
 	struct tty		*tty = &c->tty;
-	struct window_pane	*wp;
 	struct grid_cell	 m_active_gc, active_gc, m_other_gc, other_gc;
 	struct grid_cell	 msg_gc;
-	u_int		 	 i, j, type, msgx = 0, msgy = 0;
-	int			 active, small, flags;
+	u_int		 	 i, j, msgx = 0, msgy = 0;
+	int			 small, flags;
 	char			 msg[256];
 	const char		*tmp;
 	size_t			 msglen = 0;
 
-	small = (tty->sy - lines + top > w->sy) || (tty->sx > w->sx);
+	small = (ctx->sy + ctx->top > w->sy) || (ctx->sx > w->sx);
 	if (small) {
 		flags = w->flags & (WINDOW_FORCEWIDTH|WINDOW_FORCEHEIGHT);
 		if (flags == (WINDOW_FORCEWIDTH|WINDOW_FORCEHEIGHT))
@@ -470,12 +524,12 @@ screen_redraw_draw_borders(struct client *c, int pane_status, u_int lines,
 		    w->sx, w->sy, tmp);
 		msglen = strlen(msg);
 
-		if (tty->sy - 1 - lines + top > w->sy && tty->sx >= msglen) {
-			msgx = tty->sx - msglen;
-			msgy = tty->sy - 1 - lines + top;
-		} else if (tty->sx - w->sx > msglen) {
-			msgx = tty->sx - msglen;
-			msgy = tty->sy - 1 - lines + top;
+		if (ctx->sy - 1 + ctx->top > w->sy && ctx->sx >= msglen) {
+			msgx = ctx->sx - msglen;
+			msgy = ctx->sy - 1 + ctx->top;
+		} else if (ctx->sx - w->sx > msglen) {
+			msgx = ctx->sx - msglen;
+			msgy = ctx->sy - 1 + ctx->top;
 		} else
 			small = 0;
 	}
@@ -489,33 +543,11 @@ screen_redraw_draw_borders(struct client *c, int pane_status, u_int lines,
 	memcpy(&m_active_gc, &active_gc, sizeof m_active_gc);
 	m_active_gc.attr ^= GRID_ATTR_REVERSE;
 
-	for (j = 0; j < tty->sy - lines; j++) {
-		for (i = 0; i < tty->sx; i++) {
-			type = screen_redraw_check_cell(c, i, j, pane_status,
-			    &wp);
-			if (type == CELL_INSIDE)
-				continue;
-			if (type == CELL_OUTSIDE && small &&
-			    i > msgx && j == msgy)
-				continue;
-			active = screen_redraw_check_is(i, j, type, pane_status,
-			    w, w->active, wp);
-			if (server_is_marked(s, s->curw, marked_pane.wp) &&
-			    screen_redraw_check_is(i, j, type, pane_status, w,
-			    marked_pane.wp, wp)) {
-				if (active)
-					tty_attributes(tty, &m_active_gc, NULL);
-				else
-					tty_attributes(tty, &m_other_gc, NULL);
-			} else if (active)
-				tty_attributes(tty, &active_gc, NULL);
-			else
-				tty_attributes(tty, &other_gc, NULL);
-			if (top)
-				tty_cursor(tty, i, lines + j);
-			else
-				tty_cursor(tty, i, j);
-			tty_putc(tty, CELL_BORDERS[type]);
+	for (j = 0; j < ctx->sy; j++) {
+		for (i = 0; i < ctx->sx; i++) {
+			screen_redraw_draw_borders_cell(ctx, i, j, small,
+			    msgx, msgy, &m_active_gc, &active_gc, &m_other_gc,
+			    &other_gc);
 		}
 	}
 
@@ -529,48 +561,49 @@ screen_redraw_draw_borders(struct client *c, int pane_status, u_int lines,
 
 /* Draw the panes. */
 static void
-screen_redraw_draw_panes(struct client *c, u_int lines, u_int top)
+screen_redraw_draw_panes(struct screen_redraw_ctx *ctx)
 {
+	struct client		*c = ctx->c;
 	struct window		*w = c->session->curw->window;
 	struct tty		*tty = &c->tty;
 	struct window_pane	*wp;
 	u_int		 	 i, y;
 
-	if (top)
-		y = lines;
+	if (ctx->top)
+		y = ctx->lines;
 	else
 		y = 0;
-
 	TAILQ_FOREACH(wp, &w->panes, entry) {
 		if (!window_pane_visible(wp))
 			continue;
 		for (i = 0; i < wp->sy; i++)
 			tty_draw_pane(tty, wp, i, wp->xoff, y + wp->yoff);
 		if (c->flags & CLIENT_IDENTIFY)
-			screen_redraw_draw_number(c, wp, lines, top);
+			screen_redraw_draw_number(ctx, wp);
 	}
 }
 
 /* Draw the status line. */
 static void
-screen_redraw_draw_status(struct client *c, u_int lines, u_int top)
+screen_redraw_draw_status(struct screen_redraw_ctx *ctx)
 {
+	struct client	*c = ctx->c;
 	struct tty	*tty = &c->tty;
 	u_int		 i, y;
 
-	if (top)
+	if (ctx->top)
 		y = 0;
 	else
-		y = tty->sy - lines;
-	for (i = 0; i < lines; i++)
+		y = ctx->sy;
+	for (i = 0; i < ctx->lines; i++)
 		tty_draw_line(tty, NULL, &c->status.status, i, 0, y);
 }
 
 /* Draw number on a pane. */
 static void
-screen_redraw_draw_number(struct client *c, struct window_pane *wp,
-    u_int lines, u_int top)
+screen_redraw_draw_number(struct screen_redraw_ctx *ctx, struct window_pane *wp)
 {
+	struct client		*c = ctx->c;
 	struct tty		*tty = &c->tty;
 	struct session		*s = c->session;
 	struct options		*oo = s->options;
@@ -593,8 +626,8 @@ screen_redraw_draw_number(struct client *c, struct window_pane *wp,
 	px = wp->sx / 2; py = wp->sy / 2;
 	xoff = wp->xoff; yoff = wp->yoff;
 
-	if (top)
-		yoff += lines;
+	if (ctx->top)
+		yoff += ctx->lines;
 
 	if (wp->sx < len * 6 || wp->sy < 5) {
 		tty_cursor(tty, xoff + px - len / 2, yoff + py);

screen-write.c

@@ -408,7 +408,7 @@ screen_write_fast_copy(struct screen_write_ctx *ctx, struct screen *src,
 			break;
 		cx = s->cx;
 		for (xx = px; xx < px + nx; xx++) {
-			if (xx >= gd->linedata[yy].cellsize)
+			if (xx >= grid_get_line(gd, yy)->cellsize)
 				break;
 			grid_get_cell(gd, xx, yy, &gc);
 			if (xx + gc.data.width > px + nx)
@@ -694,7 +694,7 @@ screen_write_backspace(struct screen_write_ctx *ctx)
 	if (s->cx == 0) {
 		if (s->cy == 0)
 			return;
-		gl = &s->grid->linedata[s->grid->hsize + s->cy - 1];
+		gl = grid_get_line(s->grid, s->grid->hsize + s->cy - 1);
 		if (gl->flags & GRID_LINE_WRAPPED) {
 			s->cy--;
 			s->cx = screen_size_x(s) - 1;
@@ -917,7 +917,7 @@ screen_write_clearline(struct screen_write_ctx *ctx, u_int bg)
 	struct tty_ctx		 ttyctx;
 	u_int			 sx = screen_size_x(s);
 
-	gl = &s->grid->linedata[s->grid->hsize + s->cy];
+	gl = grid_get_line(s->grid, s->grid->hsize + s->cy);
 	if (gl->cellsize == 0 && bg == 8)
 		return;
 
@@ -940,7 +940,7 @@ screen_write_clearendofline(struct screen_write_ctx *ctx, u_int bg)
 	struct tty_ctx		 ttyctx;
 	u_int			 sx = screen_size_x(s);
 
-	gl = &s->grid->linedata[s->grid->hsize + s->cy];
+	gl = grid_get_line(s->grid, s->grid->hsize + s->cy);
 	if (s->cx > sx - 1 || (s->cx >= gl->cellsize && bg == 8))
 		return;
 
@@ -1043,7 +1043,7 @@ screen_write_linefeed(struct screen_write_ctx *ctx, int wrapped, u_int bg)
 	struct grid		*gd = s->grid;
 	struct grid_line	*gl;
 
-	gl = &gd->linedata[gd->hsize + s->cy];
+	gl = grid_get_line(gd, gd->hsize + s->cy);
 	if (wrapped)
 		gl->flags |= GRID_LINE_WRAPPED;
 	else
@@ -1343,7 +1343,7 @@ screen_write_collect_add(struct screen_write_ctx *ctx,
 		collect = 0;
 	else if (s->mode & MODE_INSERT)
 		collect = 0;
-	else if (s->sel.flag)
+	else if (s->sel != NULL)
 		collect = 0;
 	if (!collect) {
 		screen_write_collect_end(ctx);
@@ -1433,7 +1433,7 @@ screen_write_cell(struct screen_write_ctx *ctx, const struct grid_cell *gc)
 	screen_write_initctx(ctx, &ttyctx);
 
 	/* Handle overwriting of UTF-8 characters. */
-	gl = &s->grid->linedata[s->grid->hsize + s->cy];
+	gl = grid_get_line(s->grid, s->grid->hsize + s->cy);
 	if (gl->flags & GRID_LINE_EXTENDED) {
 		grid_view_get_cell(gd, s->cx, s->cy, &now_gc);
 		if (screen_write_overwrite(ctx, &now_gc, width))

screen.c

@@ -24,6 +24,22 @@
 
 #include "tmux.h"
 
+/* Selected area in screen. */
+struct screen_sel {
+	int		 hidden;
+	int		 rectangle;
+	int		 modekeys;
+
+	u_int		 sx;
+	u_int		 sy;
+
+	u_int		 ex;
+	u_int		 ey;
+
+	struct grid_cell cell;
+};
+
+/* Entry on title stack. */
 struct screen_title_entry {
 	char				*text;
 
@@ -66,6 +82,7 @@ screen_init(struct screen *s, u_int sx, u_int sy, u_int hlimit)
 	s->cstyle = 0;
 	s->ccolour = xstrdup("");
 	s->tabs = NULL;
+	s->sel = NULL;
 
 	screen_reinit(s);
 }
@@ -94,6 +111,7 @@ screen_reinit(struct screen *s)
 void
 screen_free(struct screen *s)
 {
+	free(s->sel);
 	free(s->tabs);
 	free(s->title);
 	free(s->ccolour);
@@ -280,9 +298,8 @@ screen_resize_y(struct screen *s, u_int sy)
 		s->cy -= needed;
 	}
 
-	/* Resize line arrays. */
-	gd->linedata = xreallocarray(gd->linedata, gd->hsize + sy,
-	    sizeof *gd->linedata);
+	/* Resize line array. */
+	grid_adjust_lines(gd, gd->hsize + sy);
 
 	/* Size increasing. */
 	if (sy > oldy) {
@@ -305,7 +322,7 @@ screen_resize_y(struct screen *s, u_int sy)
 
 		/* Then fill the rest in with blanks. */
 		for (i = gd->hsize + sy - needed; i < gd->hsize + sy; i++)
-			memset(&gd->linedata[i], 0, sizeof gd->linedata[i]);
+			memset(grid_get_line(gd, i), 0, sizeof(struct grid_line));
 	}
 
 	/* Set the new size, and reset the scroll region. */
@@ -317,51 +334,49 @@ screen_resize_y(struct screen *s, u_int sy)
 /* Set selection. */
 void
 screen_set_selection(struct screen *s, u_int sx, u_int sy,
-    u_int ex, u_int ey, u_int rectflag, struct grid_cell *gc)
+    u_int ex, u_int ey, u_int rectangle, int modekeys, struct grid_cell *gc)
 {
-	struct screen_sel	*sel = &s->sel;
+	if (s->sel == NULL)
+		s->sel = xcalloc(1, sizeof *s->sel);
 
-	memcpy(&sel->cell, gc, sizeof sel->cell);
-	sel->flag = 1;
-	sel->hidden = 0;
+	memcpy(&s->sel->cell, gc, sizeof s->sel->cell);
+	s->sel->hidden = 0;
+	s->sel->rectangle = rectangle;
+	s->sel->modekeys = modekeys;
 
-	sel->rectflag = rectflag;
-
-	sel->sx = sx; sel->sy = sy;
-	sel->ex = ex; sel->ey = ey;
+	s->sel->sx = sx;
+	s->sel->sy = sy;
+	s->sel->ex = ex;
+	s->sel->ey = ey;
 }
 
 /* Clear selection. */
 void
 screen_clear_selection(struct screen *s)
 {
-	struct screen_sel	*sel = &s->sel;
-
-	sel->flag = 0;
-	sel->hidden = 0;
-	sel->lineflag = LINE_SEL_NONE;
+	free(s->sel);
+	s->sel = NULL;
 }
 
 /* Hide selection. */
 void
 screen_hide_selection(struct screen *s)
 {
-	struct screen_sel	*sel = &s->sel;
-
-	sel->hidden = 1;
+	if (s->sel != NULL)
+		s->sel->hidden = 1;
 }
 
 /* Check if cell in selection. */
 int
 screen_check_selection(struct screen *s, u_int px, u_int py)
 {
-	struct screen_sel	*sel = &s->sel;
+	struct screen_sel	*sel = s->sel;
 	u_int			 xx;
 
-	if (!sel->flag || sel->hidden)
+	if (sel == NULL || sel->hidden)
 		return (0);
 
-	if (sel->rectflag) {
+	if (sel->rectangle) {
 		if (sel->sy < sel->ey) {
 			/* start line < end line -- downward selection. */
 			if (py < sel->sy || py > sel->ey)
@@ -454,10 +469,10 @@ void
 screen_select_cell(struct screen *s, struct grid_cell *dst,
     const struct grid_cell *src)
 {
-	if (!s->sel.flag || s->sel.hidden)
+	if (s->sel == NULL || s->sel->hidden)
 		return;
 
-	memcpy(dst, &s->sel.cell, sizeof *dst);
+	memcpy(dst, &s->sel->cell, sizeof *dst);
 
 	utf8_copy(&dst->data, &src->data);
 	dst->attr = dst->attr & ~GRID_ATTR_CHARSET;

server-client.c

@@ -41,6 +41,8 @@ static void	server_client_check_redraw(struct client *);
 static void	server_client_set_title(struct client *);
 static void	server_client_reset_state(struct client *);
 static int	server_client_assume_paste(struct session *);
+static void	server_client_clear_identify(struct client *,
+		    struct window_pane *);
 
 static void	server_client_dispatch(struct imsg *, void *);
 static void	server_client_dispatch_command(struct client *, struct imsg *);
@@ -91,7 +93,7 @@ server_client_set_identify(struct client *c, u_int delay)
 }
 
 /* Clear identify mode on client. */
-void
+static void
 server_client_clear_identify(struct client *c, struct window_pane *wp)
 {
 	if (~c->flags & CLIENT_IDENTIFY)
@@ -813,7 +815,7 @@ server_client_handle_key(struct client *c, key_code key)
 	struct window_pane	*wp;
 	struct timeval		 tv;
 	struct key_table	*table, *first;
-	struct key_binding	 bd_find, *bd;
+	struct key_binding	*bd;
 	int			 xtimeout, flags;
 	struct cmd_find_state	 fs;
 	key_code		 key0;
@@ -882,11 +884,11 @@ server_client_handle_key(struct client *c, key_code key)
 
 	/* Forward mouse keys if disabled. */
 	if (KEYC_IS_MOUSE(key) && !options_get_number(s->options, "mouse"))
-		goto forward;
+		goto forward_key;
 
 	/* Treat everything as a regular key when pasting is detected. */
 	if (!KEYC_IS_MOUSE(key) && server_client_assume_paste(s))
-		goto forward;
+		goto forward_key;
 
 	/*
 	 * Work out the current key table. If the pane is in a mode, use
@@ -901,11 +903,11 @@ server_client_handle_key(struct client *c, key_code key)
 		table = c->keytable;
 	first = table;
 
+table_changed:
 	/*
 	 * The prefix always takes precedence and forces a switch to the prefix
 	 * table, unless we are already there.
 	 */
-retry:
 	key0 = (key & ~KEYC_XTERM);
 	if ((key0 == (key_code)options_get_number(s->options, "prefix") ||
 	    key0 == (key_code)options_get_number(s->options, "prefix2")) &&
@@ -924,9 +926,9 @@ retry:
 	if (c->flags & CLIENT_REPEAT)
 		log_debug("currently repeating");
 
+try_again:
 	/* Try to see if there is a key binding in the current table. */
-	bd_find.key = key0;
-	bd = RB_FIND(key_bindings, &table->key_bindings, &bd_find);
+	bd = key_bindings_get(table, key0);
 	if (bd != NULL) {
 		/*
 		 * Key was matched in this table. If currently repeating but a
@@ -939,7 +941,7 @@ retry:
 			c->flags &= ~CLIENT_REPEAT;
 			server_status_client(c);
 			table = c->keytable;
-			goto retry;
+			goto table_changed;
 		}
 		log_debug("found in key table %s", table->name);
 
@@ -973,6 +975,14 @@ retry:
 		return;
 	}
 
+	/*
+	 * No match, try the ANY key.
+	 */
+	if (key0 != KEYC_ANY) {
+		key0 = KEYC_ANY;
+		goto try_again;
+	}
+
 	/*
 	 * No match in this table. If not in the root table or if repeating,
 	 * switch the client back to the root table and try again.
@@ -984,7 +994,7 @@ retry:
 		c->flags &= ~CLIENT_REPEAT;
 		server_status_client(c);
 		table = c->keytable;
-		goto retry;
+		goto table_changed;
 	}
 
 	/*
@@ -997,7 +1007,7 @@ retry:
 		return;
 	}
 
-forward:
+forward_key:
 	if (c->flags & CLIENT_READONLY)
 		return;
 	if (wp != NULL)
@@ -1158,10 +1168,6 @@ server_client_check_focus(struct window_pane *wp)
 	push = wp->flags & PANE_FOCUSPUSH;
 	wp->flags &= ~PANE_FOCUSPUSH;
 
-	/* If we don't care about focus, forget it. */
-	if (!(wp->base.mode & MODE_FOCUSON))
-		return;
-
 	/* If we're not the active pane in our window, we're not focused. */
 	if (wp->window->active != wp)
 		goto not_focused;
@@ -1185,14 +1191,20 @@ server_client_check_focus(struct window_pane *wp)
 	}
 
 not_focused:
-	if (push || (wp->flags & PANE_FOCUSED))
-		bufferevent_write(wp->event, "\033[O", 3);
+	if (push || (wp->flags & PANE_FOCUSED)) {
+		if (wp->base.mode & MODE_FOCUSON)
+			bufferevent_write(wp->event, "\033[O", 3);
+		notify_pane("pane-focus-out", wp);
+	}
 	wp->flags &= ~PANE_FOCUSED;
 	return;
 
 focused:
-	if (push || !(wp->flags & PANE_FOCUSED))
-		bufferevent_write(wp->event, "\033[I", 3);
+	if (push || !(wp->flags & PANE_FOCUSED)) {
+		if (wp->base.mode & MODE_FOCUSON)
+			bufferevent_write(wp->event, "\033[I", 3);
+		notify_pane("pane-focus-in", wp);
+	}
 	wp->flags |= PANE_FOCUSED;
 }
 
@@ -1861,15 +1873,19 @@ server_client_add_message(struct client *c, const char *fmt, ...)
 
 /* Get client working directory. */
 const char *
-server_client_get_cwd(struct client *c)
+server_client_get_cwd(struct client *c, struct session *s)
 {
-	struct session	*s;
+	const char	*home;
 
 	if (c != NULL && c->session == NULL && c->cwd != NULL)
 		return (c->cwd);
+	if (s != NULL && s->cwd != NULL)
+		return (s->cwd);
 	if (c != NULL && (s = c->session) != NULL && s->cwd != NULL)
 		return (s->cwd);
-	return (".");
+	if ((home = find_home()) != NULL)
+		return (home);
+	return ("/");
 }
 
 /* Resolve an absolute path or relative to client working directory. */
@@ -1881,7 +1897,7 @@ server_client_get_path(struct client *c, const char *file)
 	if (*file == '/')
 		path = xstrdup(file);
 	else
-		xasprintf(&path, "%s/%s", server_client_get_cwd(c), file);
+		xasprintf(&path, "%s/%s", server_client_get_cwd(c, NULL), file);
 	if (realpath(path, resolved) == NULL)
 		return (path);
 	free(path);

server-fn.c

@@ -175,6 +175,22 @@ server_lock_client(struct client *c)
 	proc_send(c->peer, MSG_LOCK, -1, cmd, strlen(cmd) + 1);
 }
 
+void
+server_kill_pane(struct window_pane *wp)
+{
+	struct window	*w = wp->window;
+
+	if (window_count_panes(w) == 1) {
+		server_kill_window(w);
+		recalculate_sizes();
+	} else {
+		server_unzoom_window(w);
+		layout_close_pane(wp);
+		window_remove_pane(w, wp);
+		server_redraw_window(w);
+	}
+}
+
 void
 server_kill_window(struct window *w)
 {

server.c

@@ -201,7 +201,6 @@ server_start(struct tmuxproc *client, struct event_base *base, int lockfd,
 	RB_INIT(&all_window_panes);
 	TAILQ_INIT(&clients);
 	RB_INIT(&sessions);
-	RB_INIT(&session_groups);
 	key_bindings_init();
 
 	gettimeofday(&start_time, NULL);

session.c

@@ -28,7 +28,7 @@
 
 struct sessions		sessions;
 static u_int		next_session_id;
-struct session_groups	session_groups;
+struct session_groups	session_groups = RB_INITIALIZER(&session_groups);
 
 static void	session_free(int, short, void *);
 
@@ -40,21 +40,19 @@ static struct winlink *session_previous_alert(struct winlink *);
 static void	session_group_remove(struct session *);
 static void	session_group_synchronize1(struct session *, struct session *);
 
-RB_GENERATE(sessions, session, entry, session_cmp);
-
 int
 session_cmp(struct session *s1, struct session *s2)
 {
 	return (strcmp(s1->name, s2->name));
 }
+RB_GENERATE(sessions, session, entry, session_cmp);
 
-RB_GENERATE(session_groups, session_group, entry, session_group_cmp);
-
-int
+static int
 session_group_cmp(struct session_group *s1, struct session_group *s2)
 {
 	return (strcmp(s1->name, s2->name));
 }
+RB_GENERATE_STATIC(session_groups, session_group, entry, session_group_cmp);
 
 /*
  * Find if session is still alive. This is true if it is still on the global
@@ -290,9 +288,10 @@ session_update_activity(struct session *s, struct timeval *from)
 	else
 		memcpy(&s->activity_time, from, sizeof s->activity_time);
 
-	log_debug("session %s activity %lld.%06d (last %lld.%06d)", s->name,
-	    (long long)s->activity_time.tv_sec, (int)s->activity_time.tv_usec,
-	    (long long)last->tv_sec, (int)last->tv_usec);
+	log_debug("session $%u %s activity %lld.%06d (last %lld.%06d)", s->id,
+	    s->name, (long long)s->activity_time.tv_sec,
+	    (int)s->activity_time.tv_usec, (long long)last->tv_sec,
+	    (int)last->tv_usec);
 
 	if (evtimer_initialized(&s->lock_timer))
 		evtimer_del(&s->lock_timer);

tmux.1

@@ -855,6 +855,8 @@ the initial size is 80 x 24;
 and
 .Fl y
 can be used to specify a different size.
+.Ql -
+uses the size of the current client if any.
 .Pp
 If run from a terminal, any
 .Xr termios 4
@@ -966,7 +968,7 @@ show debugging information about jobs and terminals.
 Execute commands from
 .Ar path
 (which may be a
-.Xr glob 3
+.Xr glob 7
 pattern).
 If
 .Fl q
@@ -1463,6 +1465,8 @@ The following keys may be used in tree mode:
 .It Li "Enter" Ta "Choose selected item"
 .It Li "Up" Ta "Select previous item"
 .It Li "Down" Ta "Select next item"
+.It Li "x" Ta "Kill selected item"
+.It Li "X" Ta "Kill tagged items"
 .It Li "<" Ta "Scroll list of previews left"
 .It Li ">" Ta "Scroll list of previews right"
 .It Li "C-s" Ta "Search by name"
@@ -2753,8 +2757,7 @@ to
 from the 256-colour set,
 .Ic default ,
 or a hexadecimal RGB string such as
-.Ql #ffffff ,
-which chooses the closest match from the default 256-colour set.
+.Ql #ffffff .
 .Pp
 The attributes is either
 .Ic none
@@ -3424,6 +3427,14 @@ Run when the program running in a pane exits, but
 is on so the pane has not closed.
 .It pane-exited
 Run when the program running in a pane exits.
+.It pane-focus-in
+Run when the focus enters a pane, if the
+.Ic focus-events
+option is on.
+.It pane-focus-out
+Run when the focus exits a pane, if the
+.Ic focus-events
+option is on.
 .It pane-set-clipboard
 Run when the terminal clipboard is set using the
 .Xr xterm 1
@@ -3445,12 +3456,14 @@ Run when a window is unlinked from a session.
 Hooks are managed with these commands:
 .Bl -tag -width Ds
 .It Xo Ic set-hook
-.Op Fl gu
+.Op Fl gRu
 .Op Fl t Ar target-session
 .Ar hook-name
 .Ar command
 .Xc
-Sets (or with
+Without
+.Fl R ,
+sets (or with
 .Fl u
 unsets) hook
 .Ar hook-name
@@ -3466,6 +3479,12 @@ hooks (for
 with
 .Fl t ) .
 Like options, session hooks inherit from the global ones.
+.Pp
+With
+.Fl R ,
+run
+.Ar hook-name
+immediately.
 .It Xo Ic show-hooks
 .Op Fl g
 .Op Fl t Ar target-session
@@ -3545,11 +3564,17 @@ The possible variables are listed in the table below, or the name of a
 .Nm
 option may be used for an option's value.
 Some variables have a shorter alias such as
-.Ql #S ,
-and
+.Ql #S ;
 .Ql ##
 is replaced by a single
-.Ql # .
+.Ql # ,
+.Ql #,
+by a
+.Ql \&,
+and
+.Ql #}
+by a
+.Ql } .
 .Pp
 Conditionals are available by prefixing with
 .Ql \&?
@@ -3571,6 +3596,22 @@ if
 is enabled, or
 .Ql no
 if not.
+Conditionals can be nested arbitrarily.
+Inside a conditional,
+.Ql \&,
+and
+.Ql }
+must be escaped as
+.Ql #,
+and
+.Ql #} ,
+unless they are part of a
+.Ql #{...}
+replacement.
+For example:
+.Bd -literal -offset indent
+#{?pane_in_mode,#[fg=white#,bg=red],#[fg=red#,bg=white]}#W .
+.Ed
 .Pp
 Comparisons may be expressed by prefixing two comma-separated
 alternatives by
@@ -3598,7 +3639,7 @@ and
 .Ql &&
 evaluate to true if either or both of two comma-separated alternatives are
 true, for example
-.Ql #{||,#{pane_in_mode},#{alternate_on}} .
+.Ql #{||:#{pane_in_mode},#{alternate_on}} .
 A
 .Ql C
 performs a search for an
@@ -3745,6 +3786,7 @@ The following variables are available, where appropriate:
 .It Li "pane_tty" Ta "" Ta "Pseudo terminal of pane"
 .It Li "pane_width" Ta "" Ta "Width of pane"
 .It Li "pid" Ta ""  Ta "Server PID"
+.It Li "rectangle_toggle" Ta "" Ta "1 if rectangle selection is activated"
 .It Li "scroll_region_lower" Ta "" Ta "Bottom of scroll region in pane"
 .It Li "scroll_region_upper" Ta "" Ta "Top of scroll region in pane"
 .It Li "scroll_position" Ta "" Ta "Scroll position in copy mode"
@@ -3826,7 +3868,9 @@ for
 or
 .Ic new-session ) .
 .It
-An escape sequence:
+An escape sequence (if the
+.Ic allow-rename
+option is turned on):
 .Bd -literal -offset indent
 $ printf '\e033kWINDOW_NAME\e033\e\e'
 .Ed

tmux.h

@@ -19,8 +19,6 @@
 #ifndef TMUX_H
 #define TMUX_H
 
-#define PROTOCOL_VERSION 8
-
 #include <sys/time.h>
 #include <sys/uio.h>
 
@@ -56,6 +54,9 @@ struct session;
 struct tmuxpeer;
 struct tmuxproc;
 
+/* Client-server protocol version. */
+#define PROTOCOL_VERSION 8
+
 /* Default global configuration file. */
 #ifndef TMUX_CONF
 #define TMUX_CONF "/etc/tmux.conf"
@@ -140,6 +141,9 @@ enum {
 	KEYC_FOCUS_IN = KEYC_BASE,
 	KEYC_FOCUS_OUT,
 
+	/* "Any" key, used if not found in key table. */
+	KEYC_ANY,
+
 	/* Paste brackets. */
 	KEYC_PASTE_START,
 	KEYC_PASTE_END,
@@ -511,10 +515,11 @@ struct msg_stderr_data {
 #define ALL_MOUSE_MODES (MODE_MOUSE_STANDARD|MODE_MOUSE_BUTTON|MODE_MOUSE_ALL)
 
 /*
- * A single UTF-8 character. UTF8_SIZE must be big enough to hold at least one
- * combining character as well.
+ * A single UTF-8 character. UTF8_SIZE must be big enough to hold
+ * combining characters as well, currently at most five (of three
+ * bytes) are supported.
 */
-#define UTF8_SIZE 9
+#define UTF8_SIZE 18
 struct utf8_data {
 	u_char	data[UTF8_SIZE];
 
@@ -645,30 +650,8 @@ struct job {
 };
 LIST_HEAD(joblist, job);
 
-/* Screen selection. */
-struct screen_sel {
-	int		 flag;
-	int		 hidden;
-
-	int		 rectflag;
-	enum {
-		LINE_SEL_NONE,
-		LINE_SEL_LEFT_RIGHT,
-		LINE_SEL_RIGHT_LEFT,
-	} lineflag;
-
-	int		 modekeys;
-
-	u_int		 sx;
-	u_int		 sy;
-
-	u_int		 ex;
-	u_int		 ey;
-
-	struct grid_cell cell;
-};
-
 /* Virtual screen. */
+struct screen_sel;
 struct screen_titles;
 struct screen {
 	char			*title;
@@ -689,7 +672,7 @@ struct screen {
 
 	bitstr_t		*tabs;
 
-	struct screen_sel	 sel;
+	struct screen_sel	*sel;
 };
 
 /* Screen write context. */
@@ -736,28 +719,6 @@ struct window_mode {
 };
 #define WINDOW_MODE_TIMEOUT 180
 
-/* Structures for choose mode. */
-struct window_choose_data {
-	struct client		*start_client;
-	struct session		*start_session;
-
-	u_int			 idx;
-	int			 type;
-#define TREE_OTHER 0x0
-#define TREE_WINDOW 0x1
-#define TREE_SESSION 0x2
-
-	struct session		*tree_session; /* session of items in tree */
-
-	struct winlink		*wl;
-	int			 pane_id;
-
-	char			*ft_template;
-	struct format_tree	*ft;
-
-	char			*command;
-};
-
 /* Child window structure. */
 struct window_pane {
 	u_int		 id;
@@ -866,12 +827,11 @@ struct window {
 	int		 flags;
 #define WINDOW_BELL 0x1
 #define WINDOW_ACTIVITY 0x2
-/* 0x4 unused */
-#define WINDOW_SILENCE 0x8
-#define WINDOW_ZOOMED 0x1000
-#define WINDOW_FORCEWIDTH 0x2000
-#define WINDOW_FORCEHEIGHT 0x4000
-#define WINDOW_STYLECHANGED 0x8000
+#define WINDOW_SILENCE 0x4
+#define WINDOW_ZOOMED 0x8
+#define WINDOW_FORCEWIDTH 0x10
+#define WINDOW_FORCEHEIGHT 0x20
+#define WINDOW_STYLECHANGED 0x40
 #define WINDOW_ALERTFLAGS (WINDOW_BELL|WINDOW_ACTIVITY|WINDOW_SILENCE)
 
 	int		 alerts_queued;
@@ -1402,6 +1362,7 @@ struct client {
 	void		(*identify_callback)(struct client *,
 			     struct window_pane *);
 	void		*identify_callback_data;
+	struct cmdq_item *identify_callback_item;
 
 	char		*message_string;
 	struct event	 message_timer;
@@ -1447,7 +1408,7 @@ struct key_binding {
 RB_HEAD(key_bindings, key_binding);
 
 struct key_table {
-	const char		 *name;
+	const char		*name;
 	struct key_bindings	 key_bindings;
 
 	u_int			 references;
@@ -1468,6 +1429,7 @@ enum options_table_type {
 	OPTIONS_TABLE_STYLE,
 	OPTIONS_TABLE_ARRAY,
 };
+
 enum options_table_scope {
 	OPTIONS_TABLE_NONE,
 	OPTIONS_TABLE_SERVER,
@@ -1598,6 +1560,7 @@ void printflike(4, 5) hooks_insert(struct hooks *, struct cmdq_item *,
 		    struct cmd_find_state *, const char *, ...);
 
 /* notify.c */
+void	notify_hook(struct cmdq_item *, const char *);
 void	notify_input(struct window_pane *, struct evbuffer *);
 void	notify_client(const char *, struct client *);
 void	notify_session(const char *, struct session *);
@@ -1776,13 +1739,13 @@ long long	 args_strtonum(struct args *, u_char, long long, long long,
 /* cmd-find.c */
 int		 cmd_find_target(struct cmd_find_state *, struct cmdq_item *,
 		     const char *, enum cmd_find_type, int);
+struct client	*cmd_find_best_client(struct session *);
 struct client	*cmd_find_client(struct cmdq_item *, const char *, int);
 void		 cmd_find_clear_state(struct cmd_find_state *, int);
 int		 cmd_find_empty_state(struct cmd_find_state *);
 int		 cmd_find_valid_state(struct cmd_find_state *);
 void		 cmd_find_copy_state(struct cmd_find_state *,
 		     struct cmd_find_state *);
-void		 cmd_find_log_state(const char *, struct cmd_find_state *);
 void		 cmd_find_from_session(struct cmd_find_state *,
 		     struct session *, int);
 void		 cmd_find_from_winlink(struct cmd_find_state *,
@@ -1802,6 +1765,7 @@ int		 cmd_find_from_mouse(struct cmd_find_state *,
 int		 cmd_find_from_nothing(struct cmd_find_state *, int);
 
 /* cmd.c */
+void		 cmd_log_argv(int, char **, const char *);
 int		 cmd_pack_argv(int, char **, char *, size_t);
 int		 cmd_unpack_argv(char *, size_t, int, char ***);
 char	       **cmd_copy_argv(int, char **);
@@ -1851,13 +1815,13 @@ void	cmd_wait_for_flush(void);
 int	client_main(struct event_base *, int, char **, int);
 
 /* key-bindings.c */
-RB_PROTOTYPE(key_bindings, key_binding, entry, key_bindings_cmp);
-RB_PROTOTYPE(key_tables, key_table, entry, key_table_cmp);
-extern struct key_tables key_tables;
-int	 key_table_cmp(struct key_table *, struct key_table *);
-int	 key_bindings_cmp(struct key_binding *, struct key_binding *);
 struct key_table *key_bindings_get_table(const char *, int);
+struct key_table *key_bindings_first_table(void);
+struct key_table *key_bindings_next_table(struct key_table *);
 void	 key_bindings_unref_table(struct key_table *);
+struct key_binding *key_bindings_get(struct key_table *, key_code);
+struct key_binding *key_bindings_first(struct key_table *);
+struct key_binding *key_bindings_next(struct key_table *, struct key_binding *);
 void	 key_bindings_add(const char *, key_code, int, struct cmd_list *);
 void	 key_bindings_remove(const char *, key_code);
 void	 key_bindings_remove_table(const char *);
@@ -1891,7 +1855,6 @@ void	 server_add_accept(int);
 /* server-client.c */
 u_int	 server_client_how_many(void);
 void	 server_client_set_identify(struct client *, u_int);
-void	 server_client_clear_identify(struct client *, struct window_pane *);
 void	 server_client_set_key_table(struct client *, const char *);
 const char *server_client_get_key_table(struct client *);
 int	 server_client_check_nested(struct client *);
@@ -1909,7 +1872,7 @@ void	 server_client_push_stderr(struct client *);
 void printflike(2, 3) server_client_add_message(struct client *, const char *,
 	     ...);
 char	*server_client_get_path(struct client *, const char *);
-const char *server_client_get_cwd(struct client *);
+const char *server_client_get_cwd(struct client *, struct session *);
 
 /* server-fn.c */
 void	 server_redraw_client(struct client *);
@@ -1924,6 +1887,7 @@ void	 server_status_window(struct window *);
 void	 server_lock(void);
 void	 server_lock_session(struct session *);
 void	 server_lock_client(struct client *);
+void	 server_kill_pane(struct window_pane *);
 void	 server_kill_window(struct window *);
 int	 server_link_window(struct session *,
 	     struct winlink *, struct session *, int, int, int, char **);
@@ -2008,6 +1972,8 @@ char	*grid_string_cells(struct grid *, u_int, u_int, u_int,
 void	 grid_duplicate_lines(struct grid *, u_int, struct grid *, u_int,
 	     u_int);
 void	 grid_reflow(struct grid *, u_int, u_int *);
+struct grid_line *grid_get_line(struct grid *, u_int);
+void	 grid_adjust_lines(struct grid *, u_int);
 
 /* grid-view.c */
 void	 grid_view_get_cell(struct grid *, u_int, u_int, struct grid_cell *);
@@ -2104,8 +2070,8 @@ void	 screen_set_title(struct screen *, const char *);
 void	 screen_push_title(struct screen *);
 void	 screen_pop_title(struct screen *);
 void	 screen_resize(struct screen *, u_int, u_int, int);
-void	 screen_set_selection(struct screen *,
-	     u_int, u_int, u_int, u_int, u_int, struct grid_cell *);
+void	 screen_set_selection(struct screen *, u_int, u_int, u_int, u_int,
+	     u_int, int, struct grid_cell *);
 void	 screen_clear_selection(struct screen *);
 void	 screen_hide_selection(struct screen *);
 int	 screen_check_selection(struct screen *, u_int, u_int);
@@ -2205,6 +2171,9 @@ void		 layout_free_cell(struct layout_cell *);
 void		 layout_print_cell(struct layout_cell *, const char *, u_int);
 void		 layout_destroy_cell(struct window *, struct layout_cell *,
 		     struct layout_cell **);
+void		 layout_resize_layout(struct window *, struct layout_cell *,
+		     enum layout_type, int, int);
+struct layout_cell *layout_search_by_border(struct layout_cell *, u_int, u_int);
 void		 layout_set_size(struct layout_cell *, u_int, u_int, u_int,
 		     u_int);
 void		 layout_make_leaf(struct layout_cell *, struct window_pane *);
@@ -2249,7 +2218,6 @@ void	 mode_tree_expand_current(struct mode_tree_data *);
 void	 mode_tree_set_current(struct mode_tree_data *, uint64_t);
 void	 mode_tree_each_tagged(struct mode_tree_data *, mode_tree_each_cb,
 	     struct client *, key_code, int);
-void	 mode_tree_up(struct mode_tree_data *, int);
 void	 mode_tree_down(struct mode_tree_data *, int);
 struct mode_tree_data *mode_tree_start(struct window_pane *, struct args *,
 	     mode_tree_build_cb, mode_tree_draw_cb, mode_tree_search_cb,
@@ -2319,11 +2287,8 @@ void	control_notify_session_window_changed(struct session *);
 
 /* session.c */
 extern struct sessions sessions;
-extern struct session_groups session_groups;
 int	session_cmp(struct session *, struct session *);
 RB_PROTOTYPE(sessions, session, entry, session_cmp);
-int	session_group_cmp(struct session_group *, struct session_group *);
-RB_PROTOTYPE(session_groups, session_group, entry, session_group_cmp);
 int		 session_alive(struct session *);
 struct session	*session_find(const char *);
 struct session	*session_find_by_id_str(const char *);

tty-keys.c

@@ -171,7 +171,12 @@ static const struct tty_default_key_raw tty_default_raw_keys[] = {
 	{ "\033[201~", KEYC_PASTE_END },
 };
 
-/* Default terminfo(5) keys. */
+/*
+ * Default terminfo(5) keys. Any keys that have builtin modifiers
+ * (that is, where the key itself contains the modifiers) has the
+ * KEYC_XTERM flag set so a leading escape is not treated as meta (and
+ * probably removed).
+ */
 struct tty_default_key_code {
 	enum tty_code_code	code;
 	key_code	 	key;
@@ -191,61 +196,61 @@ static const struct tty_default_key_code tty_default_code_keys[] = {
 	{ TTYC_KF11, KEYC_F11 },
 	{ TTYC_KF12, KEYC_F12 },
 
-	{ TTYC_KF13, KEYC_F1|KEYC_SHIFT },
-	{ TTYC_KF14, KEYC_F2|KEYC_SHIFT },
-	{ TTYC_KF15, KEYC_F3|KEYC_SHIFT },
-	{ TTYC_KF16, KEYC_F4|KEYC_SHIFT },
-	{ TTYC_KF17, KEYC_F5|KEYC_SHIFT },
-	{ TTYC_KF18, KEYC_F6|KEYC_SHIFT },
-	{ TTYC_KF19, KEYC_F7|KEYC_SHIFT },
-	{ TTYC_KF20, KEYC_F8|KEYC_SHIFT },
-	{ TTYC_KF21, KEYC_F9|KEYC_SHIFT },
-	{ TTYC_KF22, KEYC_F10|KEYC_SHIFT },
-	{ TTYC_KF23, KEYC_F11|KEYC_SHIFT },
-	{ TTYC_KF24, KEYC_F12|KEYC_SHIFT },
+	{ TTYC_KF13, KEYC_F1|KEYC_SHIFT|KEYC_XTERM },
+	{ TTYC_KF14, KEYC_F2|KEYC_SHIFT|KEYC_XTERM },
+	{ TTYC_KF15, KEYC_F3|KEYC_SHIFT|KEYC_XTERM },
+	{ TTYC_KF16, KEYC_F4|KEYC_SHIFT|KEYC_XTERM },
+	{ TTYC_KF17, KEYC_F5|KEYC_SHIFT|KEYC_XTERM },
+	{ TTYC_KF18, KEYC_F6|KEYC_SHIFT|KEYC_XTERM },
+	{ TTYC_KF19, KEYC_F7|KEYC_SHIFT|KEYC_XTERM },
+	{ TTYC_KF20, KEYC_F8|KEYC_SHIFT|KEYC_XTERM },
+	{ TTYC_KF21, KEYC_F9|KEYC_SHIFT|KEYC_XTERM },
+	{ TTYC_KF22, KEYC_F10|KEYC_SHIFT|KEYC_XTERM },
+	{ TTYC_KF23, KEYC_F11|KEYC_SHIFT|KEYC_XTERM },
+	{ TTYC_KF24, KEYC_F12|KEYC_SHIFT|KEYC_XTERM },
 
-	{ TTYC_KF25, KEYC_F1|KEYC_CTRL },
-	{ TTYC_KF26, KEYC_F2|KEYC_CTRL },
-	{ TTYC_KF27, KEYC_F3|KEYC_CTRL },
-	{ TTYC_KF28, KEYC_F4|KEYC_CTRL },
-	{ TTYC_KF29, KEYC_F5|KEYC_CTRL },
-	{ TTYC_KF30, KEYC_F6|KEYC_CTRL },
-	{ TTYC_KF31, KEYC_F7|KEYC_CTRL },
-	{ TTYC_KF32, KEYC_F8|KEYC_CTRL },
-	{ TTYC_KF33, KEYC_F9|KEYC_CTRL },
-	{ TTYC_KF34, KEYC_F10|KEYC_CTRL },
-	{ TTYC_KF35, KEYC_F11|KEYC_CTRL },
-	{ TTYC_KF36, KEYC_F12|KEYC_CTRL },
+	{ TTYC_KF25, KEYC_F1|KEYC_CTRL|KEYC_XTERM },
+	{ TTYC_KF26, KEYC_F2|KEYC_CTRL|KEYC_XTERM },
+	{ TTYC_KF27, KEYC_F3|KEYC_CTRL|KEYC_XTERM },
+	{ TTYC_KF28, KEYC_F4|KEYC_CTRL|KEYC_XTERM },
+	{ TTYC_KF29, KEYC_F5|KEYC_CTRL|KEYC_XTERM },
+	{ TTYC_KF30, KEYC_F6|KEYC_CTRL|KEYC_XTERM },
+	{ TTYC_KF31, KEYC_F7|KEYC_CTRL|KEYC_XTERM },
+	{ TTYC_KF32, KEYC_F8|KEYC_CTRL|KEYC_XTERM },
+	{ TTYC_KF33, KEYC_F9|KEYC_CTRL|KEYC_XTERM },
+	{ TTYC_KF34, KEYC_F10|KEYC_CTRL|KEYC_XTERM },
+	{ TTYC_KF35, KEYC_F11|KEYC_CTRL|KEYC_XTERM },
+	{ TTYC_KF36, KEYC_F12|KEYC_CTRL|KEYC_XTERM },
 
-	{ TTYC_KF37, KEYC_F1|KEYC_SHIFT|KEYC_CTRL },
-	{ TTYC_KF38, KEYC_F2|KEYC_SHIFT|KEYC_CTRL },
-	{ TTYC_KF39, KEYC_F3|KEYC_SHIFT|KEYC_CTRL },
-	{ TTYC_KF40, KEYC_F4|KEYC_SHIFT|KEYC_CTRL },
-	{ TTYC_KF41, KEYC_F5|KEYC_SHIFT|KEYC_CTRL },
-	{ TTYC_KF42, KEYC_F6|KEYC_SHIFT|KEYC_CTRL },
-	{ TTYC_KF43, KEYC_F7|KEYC_SHIFT|KEYC_CTRL },
-	{ TTYC_KF44, KEYC_F8|KEYC_SHIFT|KEYC_CTRL },
-	{ TTYC_KF45, KEYC_F9|KEYC_SHIFT|KEYC_CTRL },
-	{ TTYC_KF46, KEYC_F10|KEYC_SHIFT|KEYC_CTRL },
-	{ TTYC_KF47, KEYC_F11|KEYC_SHIFT|KEYC_CTRL },
-	{ TTYC_KF48, KEYC_F12|KEYC_SHIFT|KEYC_CTRL },
+	{ TTYC_KF37, KEYC_F1|KEYC_SHIFT|KEYC_CTRL|KEYC_XTERM },
+	{ TTYC_KF38, KEYC_F2|KEYC_SHIFT|KEYC_CTRL|KEYC_XTERM },
+	{ TTYC_KF39, KEYC_F3|KEYC_SHIFT|KEYC_CTRL|KEYC_XTERM },
+	{ TTYC_KF40, KEYC_F4|KEYC_SHIFT|KEYC_CTRL|KEYC_XTERM },
+	{ TTYC_KF41, KEYC_F5|KEYC_SHIFT|KEYC_CTRL|KEYC_XTERM },
+	{ TTYC_KF42, KEYC_F6|KEYC_SHIFT|KEYC_CTRL|KEYC_XTERM },
+	{ TTYC_KF43, KEYC_F7|KEYC_SHIFT|KEYC_CTRL|KEYC_XTERM },
+	{ TTYC_KF44, KEYC_F8|KEYC_SHIFT|KEYC_CTRL|KEYC_XTERM },
+	{ TTYC_KF45, KEYC_F9|KEYC_SHIFT|KEYC_CTRL|KEYC_XTERM },
+	{ TTYC_KF46, KEYC_F10|KEYC_SHIFT|KEYC_CTRL|KEYC_XTERM },
+	{ TTYC_KF47, KEYC_F11|KEYC_SHIFT|KEYC_CTRL|KEYC_XTERM },
+	{ TTYC_KF48, KEYC_F12|KEYC_SHIFT|KEYC_CTRL|KEYC_XTERM },
 
-	{ TTYC_KF49, KEYC_F1|KEYC_ESCAPE },
-	{ TTYC_KF50, KEYC_F2|KEYC_ESCAPE },
-	{ TTYC_KF51, KEYC_F3|KEYC_ESCAPE },
-	{ TTYC_KF52, KEYC_F4|KEYC_ESCAPE },
-	{ TTYC_KF53, KEYC_F5|KEYC_ESCAPE },
-	{ TTYC_KF54, KEYC_F6|KEYC_ESCAPE },
-	{ TTYC_KF55, KEYC_F7|KEYC_ESCAPE },
-	{ TTYC_KF56, KEYC_F8|KEYC_ESCAPE },
-	{ TTYC_KF57, KEYC_F9|KEYC_ESCAPE },
-	{ TTYC_KF58, KEYC_F10|KEYC_ESCAPE },
-	{ TTYC_KF59, KEYC_F11|KEYC_ESCAPE },
-	{ TTYC_KF60, KEYC_F12|KEYC_ESCAPE },
+	{ TTYC_KF49, KEYC_F1|KEYC_ESCAPE|KEYC_XTERM },
+	{ TTYC_KF50, KEYC_F2|KEYC_ESCAPE|KEYC_XTERM },
+	{ TTYC_KF51, KEYC_F3|KEYC_ESCAPE|KEYC_XTERM },
+	{ TTYC_KF52, KEYC_F4|KEYC_ESCAPE|KEYC_XTERM },
+	{ TTYC_KF53, KEYC_F5|KEYC_ESCAPE|KEYC_XTERM },
+	{ TTYC_KF54, KEYC_F6|KEYC_ESCAPE|KEYC_XTERM },
+	{ TTYC_KF55, KEYC_F7|KEYC_ESCAPE|KEYC_XTERM },
+	{ TTYC_KF56, KEYC_F8|KEYC_ESCAPE|KEYC_XTERM },
+	{ TTYC_KF57, KEYC_F9|KEYC_ESCAPE|KEYC_XTERM },
+	{ TTYC_KF58, KEYC_F10|KEYC_ESCAPE|KEYC_XTERM },
+	{ TTYC_KF59, KEYC_F11|KEYC_ESCAPE|KEYC_XTERM },
+	{ TTYC_KF60, KEYC_F12|KEYC_ESCAPE|KEYC_XTERM },
 
-	{ TTYC_KF61, KEYC_F1|KEYC_ESCAPE|KEYC_SHIFT },
-	{ TTYC_KF62, KEYC_F2|KEYC_ESCAPE|KEYC_SHIFT },
-	{ TTYC_KF63, KEYC_F3|KEYC_ESCAPE|KEYC_SHIFT },
+	{ TTYC_KF61, KEYC_F1|KEYC_ESCAPE|KEYC_SHIFT|KEYC_XTERM },
+	{ TTYC_KF62, KEYC_F2|KEYC_ESCAPE|KEYC_SHIFT|KEYC_XTERM },
+	{ TTYC_KF63, KEYC_F3|KEYC_ESCAPE|KEYC_SHIFT|KEYC_XTERM },
 
 	{ TTYC_KICH1, KEYC_IC },
 	{ TTYC_KDCH1, KEYC_DC },
@@ -261,10 +266,7 @@ static const struct tty_default_key_code tty_default_code_keys[] = {
 	{ TTYC_KCUB1, KEYC_LEFT },
 	{ TTYC_KCUF1, KEYC_RIGHT },
 
-	/*
-	 * Key and modifier capabilities. We set the xterm flag to mark that
-	 * any leading escape means an escape key press and not the modifier.
-	 */
+	/* Key and modifier capabilities. */
 	{ TTYC_KDC2, KEYC_DC|KEYC_SHIFT|KEYC_XTERM },
 	{ TTYC_KDC3, KEYC_DC|KEYC_ESCAPE|KEYC_XTERM },
 	{ TTYC_KDC4, KEYC_DC|KEYC_SHIFT|KEYC_ESCAPE|KEYC_XTERM },

tty-term.c

@@ -494,8 +494,9 @@ tty_term_find(char *name, int fd, char **cause)
 		goto error;
 	}
 
-	/* Figure out if we have 256. */
-	if (tty_term_number(term, TTYC_COLORS) == 256)
+	/* Figure out if we have 256 colours (or more). */
+	if (tty_term_number(term, TTYC_COLORS) >= 256 ||
+	    tty_term_has(term, TTYC_RGB))
 		term->flags |= TERM_256COLOURS;
 
 	/*

tty.c

@@ -913,6 +913,7 @@ tty_draw_line(struct tty *tty, const struct window_pane *wp,
 	int			 flags, cleared = 0;
 	char			 buf[512];
 	size_t			 len, old_len;
+	u_int			 cellsize;
 
 	flags = (tty->flags & TTY_NOCURSOR);
 	tty->flags |= TTY_NOCURSOR;
@@ -926,15 +927,17 @@ tty_draw_line(struct tty *tty, const struct window_pane *wp,
 	 * there may be empty background cells after it (from BCE).
 	 */
 	sx = screen_size_x(s);
-	if (sx > gd->linedata[gd->hsize + py].cellsize)
-		sx = gd->linedata[gd->hsize + py].cellsize;
+
+	cellsize = grid_get_line(gd, gd->hsize + py)->cellsize;
+	if (sx > cellsize)
+		sx = cellsize;
 	if (sx > tty->sx)
 		sx = tty->sx;
 	ux = 0;
 
 	if (wp == NULL ||
 	    py == 0 ||
-	    (~gd->linedata[gd->hsize + py - 1].flags & GRID_LINE_WRAPPED) ||
+	    (~grid_get_line(gd, gd->hsize + py - 1)->flags & GRID_LINE_WRAPPED) ||
 	    ox != 0 ||
 	    tty->cx < tty->sx ||
 	    screen_size_x(s) < tty->sx) {
@@ -1244,13 +1247,18 @@ tty_cmd_linefeed(struct tty *tty, const struct tty_ctx *ctx)
 	tty_margin_pane(tty, ctx);
 
 	/*
-	 * If we want to wrap a pane, the cursor needs to be exactly on the
-	 * right of the region. But if the pane isn't on the right, it may be
-	 * off the edge - if so, move the cursor back to the right.
+	 * If we want to wrap a pane while using margins, the cursor needs to
+	 * be exactly on the right of the region. If the cursor is entirely off
+	 * the edge - move it back to the right. Some terminals are funny about
+	 * this and insert extra spaces, so only use the right if margins are
+	 * enabled.
 	 */
-	if (ctx->xoff + ctx->ocx > tty->rright)
-		tty_cursor(tty, tty->rright, ctx->yoff + ctx->ocy);
-	else
+	if (ctx->xoff + ctx->ocx > tty->rright) {
+		if (!tty_use_margin(tty))
+			tty_cursor(tty, 0, ctx->yoff + ctx->ocy);
+		else
+			tty_cursor(tty, tty->rright, ctx->yoff + ctx->ocy);
+	} else
 		tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy);
 
 	tty_putc(tty, '\n');
@@ -1275,11 +1283,16 @@ tty_cmd_scrollup(struct tty *tty, const struct tty_ctx *ctx)
 	tty_margin_pane(tty, ctx);
 
 	if (ctx->num == 1 || !tty_term_has(tty->term, TTYC_INDN)) {
-		tty_cursor(tty, tty->rright, tty->rlower);
+		if (!tty_use_margin(tty))
+			tty_cursor(tty, 0, tty->rlower);
+		else
+			tty_cursor(tty, tty->rright, tty->rlower);
 		for (i = 0; i < ctx->num; i++)
 			tty_putc(tty, '\n');
-	} else
+	} else {
+		tty_cursor(tty, 0, tty->cy);
 		tty_putcode1(tty, TTYC_INDN, ctx->num);
+	}
 }
 
 void
@@ -1990,8 +2003,7 @@ tty_colours_fg(struct tty *tty, const struct grid_cell *gc)
 	char			 s[32];
 
 	/* Is this a 24-bit or 256-colour colour? */
-	if (gc->fg & COLOUR_FLAG_RGB ||
-	    gc->fg & COLOUR_FLAG_256) {
+	if (gc->fg & COLOUR_FLAG_RGB || gc->fg & COLOUR_FLAG_256) {
 		if (tty_try_colour(tty, gc->fg, "38") == 0)
 			goto save_fg;
 		/* Should not get here, already converted in tty_check_fg. */
@@ -2020,8 +2032,7 @@ tty_colours_bg(struct tty *tty, const struct grid_cell *gc)
 	char			 s[32];
 
 	/* Is this a 24-bit or 256-colour colour? */
-	if (gc->bg & COLOUR_FLAG_RGB ||
-	    gc->bg & COLOUR_FLAG_256) {
+	if (gc->bg & COLOUR_FLAG_RGB || gc->bg & COLOUR_FLAG_256) {
 		if (tty_try_colour(tty, gc->bg, "48") == 0)
 			goto save_bg;
 		/* Should not get here, already converted in tty_check_bg. */

window-copy.c

@@ -65,8 +65,9 @@ static void	window_copy_update_cursor(struct window_pane *, u_int, u_int);
 static void	window_copy_start_selection(struct window_pane *);
 static int	window_copy_adjust_selection(struct window_pane *, u_int *,
 		    u_int *);
+static int	window_copy_set_selection(struct window_pane *, int);
 static int	window_copy_update_selection(struct window_pane *, int);
-static void	window_copy_synchronize_cursor(struct window_pane *wp);
+static void	window_copy_synchronize_cursor(struct window_pane *);
 static void    *window_copy_get_selection(struct window_pane *, size_t *);
 static void	window_copy_copy_buffer(struct window_pane *, const char *,
 		    void *, size_t);
@@ -151,12 +152,12 @@ struct window_copy_mode_data {
 	struct screen	*backing;
 	int		 backing_written; /* backing display started */
 
-	u_int		 oy; /* number of lines scrolled up */
+	u_int		 oy;		/* number of lines scrolled up */
 
-	u_int		 selx; /* beginning of selection */
+	u_int		 selx;		/* beginning of selection */
 	u_int		 sely;
 
-	u_int		 endselx; /* end of selection */
+	u_int		 endselx;	/* end of selection */
 	u_int		 endsely;
 
 	enum {
@@ -165,14 +166,20 @@ struct window_copy_mode_data {
 		CURSORDRAG_SEL,		/* start is synchronized with cursor */
 	} cursordrag;
 
+	int		 modekeys;
+	enum {
+		LINE_SEL_NONE,
+		LINE_SEL_LEFT_RIGHT,
+		LINE_SEL_RIGHT_LEFT,
+	} lineflag;			/* line selection mode */
 	int		 rectflag;	/* in rectangle copy mode? */
 	int		 scroll_exit;	/* exit on scroll to end? */
 
 	u_int		 cx;
 	u_int		 cy;
 
-	u_int		 lastcx; /* position in last line w/ content */
-	u_int		 lastsx; /* size of last line w/ content */
+	u_int		 lastcx; 	/* position in last line w/ content */
+	u_int		 lastsx;	/* size of last line w/ content */
 
 	int		 searchtype;
 	char		*searchstr;
@@ -194,21 +201,10 @@ window_copy_init(struct window_pane *wp, __unused struct cmd_find_state *fs,
 	struct window_copy_mode_data	*data;
 	struct screen			*s;
 
-	wp->modedata = data = xmalloc(sizeof *data);
-
-	data->oy = 0;
-	data->cx = 0;
-	data->cy = 0;
+	wp->modedata = data = xcalloc(1, sizeof *data);
 
 	data->cursordrag = CURSORDRAG_NONE;
-
-	data->lastcx = 0;
-	data->lastsx = 0;
-
-	data->backing_written = 0;
-
-	data->rectflag = 0;
-	data->scroll_exit = 0;
+	data->lineflag = LINE_SEL_NONE;
 
 	if (wp->searchstr != NULL) {
 		data->searchtype = WINDOW_COPY_SEARCHUP;
@@ -228,7 +224,7 @@ window_copy_init(struct window_pane *wp, __unused struct cmd_find_state *fs,
 
 	s = &data->screen;
 	screen_init(s, screen_size_x(&wp->base), screen_size_y(&wp->base), 0);
-	s->sel.modekeys = options_get_number(wp->window->options, "mode-keys");
+	data->modekeys = options_get_number(wp->window->options, "mode-keys");
 
 	data->backing = NULL;
 
@@ -357,7 +353,7 @@ window_copy_pageup(struct window_pane *wp, int half_page)
 	oy = screen_hsize(data->backing) + data->cy - data->oy;
 	ox = window_copy_find_length(wp, oy);
 
-	if (s->sel.lineflag == LINE_SEL_LEFT_RIGHT && oy == data->sely)
+	if (data->lineflag == LINE_SEL_LEFT_RIGHT && oy == data->sely)
 		window_copy_other_end(wp);
 
 	if (data->cx != ox) {
@@ -379,7 +375,7 @@ window_copy_pageup(struct window_pane *wp, int half_page)
 	else
 		data->oy += n;
 
-	if (!data->screen.sel.flag || !data->rectflag) {
+	if (data->screen.sel == NULL || !data->rectflag) {
 		py = screen_hsize(data->backing) + data->cy - data->oy;
 		px = window_copy_find_length(wp, py);
 		if ((data->cx >= data->lastsx && data->cx != px) ||
@@ -401,7 +397,7 @@ window_copy_pagedown(struct window_pane *wp, int half_page, int scroll_exit)
 	oy = screen_hsize(data->backing) + data->cy - data->oy;
 	ox = window_copy_find_length(wp, oy);
 
-	if (s->sel.lineflag == LINE_SEL_RIGHT_LEFT && oy == data->sely)
+	if (data->lineflag == LINE_SEL_RIGHT_LEFT && oy == data->sely)
 		window_copy_other_end(wp);
 
 	if (data->cx != ox) {
@@ -423,7 +419,7 @@ window_copy_pagedown(struct window_pane *wp, int half_page, int scroll_exit)
 	else
 		data->oy -= n;
 
-	if (!data->screen.sel.flag || !data->rectflag) {
+	if (data->screen.sel == NULL || !data->rectflag) {
 		py = screen_hsize(data->backing) + data->cy - data->oy;
 		px = window_copy_find_length(wp, py);
 		if ((data->cx >= data->lastsx && data->cx != px) ||
@@ -554,7 +550,7 @@ window_copy_command(struct window_pane *wp, struct client *c, struct session *s,
 			if (m != NULL)
 				window_copy_start_drag(c, m);
 			else {
-				sn->sel.lineflag = LINE_SEL_NONE;
+				data->lineflag = LINE_SEL_NONE;
 				window_copy_start_selection(wp);
 				redraw = 1;
 			}
@@ -763,7 +759,7 @@ window_copy_command(struct window_pane *wp, struct client *c, struct session *s,
 				window_copy_cursor_previous_word(wp, ws);
 		}
 		if (strcmp(command, "rectangle-toggle") == 0) {
-			sn->sel.lineflag = LINE_SEL_NONE;
+			data->lineflag = LINE_SEL_NONE;
 			window_copy_rectangle_toggle(wp);
 		}
 		if (strcmp(command, "scroll-down") == 0 ||
@@ -800,7 +796,7 @@ window_copy_command(struct window_pane *wp, struct client *c, struct session *s,
 			}
 		}
 		if (strcmp(command, "select-line") == 0) {
-			sn->sel.lineflag = LINE_SEL_LEFT_RIGHT;
+			data->lineflag = LINE_SEL_LEFT_RIGHT;
 			data->rectflag = 0;
 			window_copy_cursor_start_of_line(wp);
 			window_copy_start_selection(wp);
@@ -810,7 +806,7 @@ window_copy_command(struct window_pane *wp, struct client *c, struct session *s,
 			redraw = 1;
 		}
 		if (strcmp(command, "select-word") == 0) {
-			sn->sel.lineflag = LINE_SEL_LEFT_RIGHT;
+			data->lineflag = LINE_SEL_LEFT_RIGHT;
 			data->rectflag = 0;
 			ws = options_get_string(s->options, "word-separators");
 			window_copy_cursor_previous_word(wp, ws);
@@ -1434,7 +1430,6 @@ static void
 window_copy_start_selection(struct window_pane *wp)
 {
 	struct window_copy_mode_data	*data = wp->modedata;
-	struct screen			*s = &data->screen;
 
 	data->selx = data->cx;
 	data->sely = screen_hsize(data->backing) + data->cy - data->oy;
@@ -1444,8 +1439,7 @@ window_copy_start_selection(struct window_pane *wp)
 
 	data->cursordrag = CURSORDRAG_ENDSEL;
 
-	s->sel.flag = 1;
-	window_copy_update_selection(wp, 1);
+	window_copy_set_selection(wp, 1);
 }
 
 static int
@@ -1482,6 +1476,17 @@ window_copy_adjust_selection(struct window_pane *wp, u_int *selx, u_int *sely)
 
 static int
 window_copy_update_selection(struct window_pane *wp, int may_redraw)
+{
+	struct window_copy_mode_data	*data = wp->modedata;
+	struct screen			*s = &data->screen;
+
+	if (s->sel == NULL && data->lineflag == LINE_SEL_NONE)
+		return (0);
+	return (window_copy_set_selection(wp, may_redraw));
+}
+
+static int
+window_copy_set_selection(struct window_pane *wp, int may_redraw)
 {
 	struct window_copy_mode_data	*data = wp->modedata;
 	struct screen			*s = &data->screen;
@@ -1490,9 +1495,6 @@ window_copy_update_selection(struct window_pane *wp, int may_redraw)
 	u_int				 sx, sy, cy, endsx, endsy;
 	int				 startrelpos, endrelpos;
 
-	if (!s->sel.flag && s->sel.lineflag == LINE_SEL_NONE)
-		return (0);
-
 	window_copy_synchronize_cursor(wp);
 
 	/* Adjust the selection. */
@@ -1515,7 +1517,8 @@ window_copy_update_selection(struct window_pane *wp, int may_redraw)
 	/* Set colours and selection. */
 	style_apply(&gc, oo, "mode-style");
 	gc.flags |= GRID_FLAG_NOPALETTE;
-	screen_set_selection(s, sx, sy, endsx, endsy, data->rectflag, &gc);
+	screen_set_selection(s, sx, sy, endsx, endsy, data->rectflag,
+	    data->modekeys, &gc);
 
 	if (data->rectflag && may_redraw) {
 		/*
@@ -1548,10 +1551,10 @@ window_copy_get_selection(struct window_pane *wp, size_t *len)
 	char				*buf;
 	size_t				 off;
 	u_int				 i, xx, yy, sx, sy, ex, ey, ey_last;
-	u_int				 firstsx, lastex, restex, restsx;
+	u_int				 firstsx, lastex, restex, restsx, selx;
 	int				 keys;
 
-	if (!s->sel.flag && s->sel.lineflag == LINE_SEL_NONE)
+	if (data->screen.sel == NULL && data->lineflag == LINE_SEL_NONE)
 		return (NULL);
 
 	buf = xmalloc(1);
@@ -1599,7 +1602,11 @@ window_copy_get_selection(struct window_pane *wp, size_t *len)
 		 * Need to ignore the column with the cursor in it, which for
 		 * rectangular copy means knowing which side the cursor is on.
 		 */
-		if (data->selx < data->cx) {
+		if (data->cursordrag == CURSORDRAG_ENDSEL)
+			selx = data->selx;
+		else
+			selx = data->endselx;
+		if (selx < data->cx) {
 			/* Selection start is on the left. */
 			if (keys == MODEKEY_EMACS) {
 				lastex = data->cx;
@@ -1609,12 +1616,12 @@ window_copy_get_selection(struct window_pane *wp, size_t *len)
 				lastex = data->cx + 1;
 				restex = data->cx + 1;
 			}
-			firstsx = data->selx;
-			restsx = data->selx;
+			firstsx = selx;
+			restsx = selx;
 		} else {
 			/* Cursor is on the left. */
-			lastex = data->selx + 1;
-			restex = data->selx + 1;
+			lastex = selx + 1;
+			restex = selx + 1;
 			firstsx = data->cx;
 			restsx = data->cx;
 		}
@@ -1751,7 +1758,7 @@ window_copy_copy_line(struct window_pane *wp, char **buf, size_t *off, u_int sy,
 	 * Work out if the line was wrapped at the screen edge and all of it is
 	 * on screen.
 	 */
-	gl = &gd->linedata[sy];
+	gl = grid_get_line(gd, sy);
 	if (gl->flags & GRID_LINE_WRAPPED && gl->cellsize <= gd->sx)
 		wrapped = 1;
 
@@ -1839,7 +1846,7 @@ window_copy_find_length(struct window_pane *wp, u_int py)
 	 * width of the grid, and screen_write_copy treats them as spaces, so
 	 * ignore them here too.
 	 */
-	px = s->grid->linedata[py].cellsize;
+	px = grid_get_line(s->grid, py)->cellsize;
 	if (px > screen_size_x(s))
 		px = screen_size_x(s);
 	while (px > 0) {
@@ -1856,14 +1863,13 @@ window_copy_cursor_start_of_line(struct window_pane *wp)
 {
 	struct window_copy_mode_data	*data = wp->modedata;
 	struct screen			*back_s = data->backing;
-	struct screen			*s = &data->screen;
 	struct grid			*gd = back_s->grid;
 	u_int				 py;
 
-	if (data->cx == 0 && s->sel.lineflag == LINE_SEL_NONE) {
+	if (data->cx == 0 && data->lineflag == LINE_SEL_NONE) {
 		py = screen_hsize(back_s) + data->cy - data->oy;
 		while (py > 0 &&
-		    gd->linedata[py-1].flags & GRID_LINE_WRAPPED) {
+		    grid_get_line(gd, py - 1)->flags & GRID_LINE_WRAPPED) {
 			window_copy_cursor_up(wp, 0);
 			py = screen_hsize(back_s) + data->cy - data->oy;
 		}
@@ -1901,22 +1907,24 @@ window_copy_cursor_end_of_line(struct window_pane *wp)
 {
 	struct window_copy_mode_data	*data = wp->modedata;
 	struct screen			*back_s = data->backing;
-	struct screen			*s = &data->screen;
 	struct grid			*gd = back_s->grid;
+	struct grid_line		*gl;
 	u_int				 px, py;
 
 	py = screen_hsize(back_s) + data->cy - data->oy;
 	px = window_copy_find_length(wp, py);
 
-	if (data->cx == px && s->sel.lineflag == LINE_SEL_NONE) {
-		if (data->screen.sel.flag && data->rectflag)
+	if (data->cx == px && data->lineflag == LINE_SEL_NONE) {
+		if (data->screen.sel != NULL && data->rectflag)
 			px = screen_size_x(back_s);
-		if (gd->linedata[py].flags & GRID_LINE_WRAPPED) {
-			while (py < gd->sy + gd->hsize &&
-			    gd->linedata[py].flags & GRID_LINE_WRAPPED) {
+		gl = grid_get_line(gd, py);
+		if (gl->flags & GRID_LINE_WRAPPED) {
+			while (py < gd->sy + gd->hsize) {
+				gl = grid_get_line(gd, py);
+				if (~gl->flags & GRID_LINE_WRAPPED)
+					break;
 				window_copy_cursor_down(wp, 0);
-				py = screen_hsize(back_s)
-				     + data->cy - data->oy;
+				py = screen_hsize(back_s) + data->cy - data->oy;
 			}
 			px = window_copy_find_length(wp, py);
 		}
@@ -1934,13 +1942,13 @@ window_copy_other_end(struct window_pane *wp)
 	struct screen			*s = &data->screen;
 	u_int				 selx, sely, cy, yy, hsize;
 
-	if (!s->sel.flag && s->sel.lineflag == LINE_SEL_NONE)
+	if (s->sel == NULL && data->lineflag == LINE_SEL_NONE)
 		return;
 
-	if (s->sel.lineflag == LINE_SEL_LEFT_RIGHT)
-		s->sel.lineflag = LINE_SEL_RIGHT_LEFT;
-	else if (s->sel.lineflag == LINE_SEL_RIGHT_LEFT)
-		s->sel.lineflag = LINE_SEL_LEFT_RIGHT;
+	if (data->lineflag == LINE_SEL_LEFT_RIGHT)
+		data->lineflag = LINE_SEL_RIGHT_LEFT;
+	else if (data->lineflag == LINE_SEL_RIGHT_LEFT)
+		data->lineflag = LINE_SEL_LEFT_RIGHT;
 
 	switch (data->cursordrag) {
 		case CURSORDRAG_NONE:
@@ -2012,7 +2020,7 @@ window_copy_cursor_right(struct window_pane *wp)
 
 	py = screen_hsize(data->backing) + data->cy - data->oy;
 	yy = screen_hsize(data->backing) + screen_size_y(data->backing) - 1;
-	if (data->screen.sel.flag && data->rectflag)
+	if (data->screen.sel != NULL && data->rectflag)
 		px = screen_size_x(&data->screen);
 	else
 		px = window_copy_find_length(wp, py);
@@ -2049,7 +2057,7 @@ window_copy_cursor_up(struct window_pane *wp, int scroll_only)
 		data->lastsx = ox;
 	}
 
-	if (s->sel.lineflag == LINE_SEL_LEFT_RIGHT && oy == data->sely)
+	if (data->lineflag == LINE_SEL_LEFT_RIGHT && oy == data->sely)
 		window_copy_other_end(wp);
 
 	data->cx = data->lastcx;
@@ -2071,7 +2079,7 @@ window_copy_cursor_up(struct window_pane *wp, int scroll_only)
 		}
 	}
 
-	if (!data->screen.sel.flag || !data->rectflag) {
+	if (data->screen.sel != NULL || !data->rectflag) {
 		py = screen_hsize(data->backing) + data->cy - data->oy;
 		px = window_copy_find_length(wp, py);
 		if ((data->cx >= data->lastsx && data->cx != px) ||
@@ -2079,9 +2087,9 @@ window_copy_cursor_up(struct window_pane *wp, int scroll_only)
 			window_copy_cursor_end_of_line(wp);
 	}
 
-	if (s->sel.lineflag == LINE_SEL_LEFT_RIGHT)
+	if (data->lineflag == LINE_SEL_LEFT_RIGHT)
 		window_copy_cursor_end_of_line(wp);
-	else if (s->sel.lineflag == LINE_SEL_RIGHT_LEFT)
+	else if (data->lineflag == LINE_SEL_RIGHT_LEFT)
 		window_copy_cursor_start_of_line(wp);
 }
 
@@ -2099,7 +2107,7 @@ window_copy_cursor_down(struct window_pane *wp, int scroll_only)
 		data->lastsx = ox;
 	}
 
-	if (s->sel.lineflag == LINE_SEL_RIGHT_LEFT && oy == data->endsely)
+	if (data->lineflag == LINE_SEL_RIGHT_LEFT && oy == data->endsely)
 		window_copy_other_end(wp);
 
 	data->cx = data->lastcx;
@@ -2113,7 +2121,7 @@ window_copy_cursor_down(struct window_pane *wp, int scroll_only)
 			window_copy_redraw_lines(wp, data->cy - 1, 2);
 	}
 
-	if (!data->screen.sel.flag || !data->rectflag) {
+	if (data->screen.sel == NULL || !data->rectflag) {
 		py = screen_hsize(data->backing) + data->cy - data->oy;
 		px = window_copy_find_length(wp, py);
 		if ((data->cx >= data->lastsx && data->cx != px) ||
@@ -2121,9 +2129,9 @@ window_copy_cursor_down(struct window_pane *wp, int scroll_only)
 			window_copy_cursor_end_of_line(wp);
 	}
 
-	if (s->sel.lineflag == LINE_SEL_LEFT_RIGHT)
+	if (data->lineflag == LINE_SEL_LEFT_RIGHT)
 		window_copy_cursor_end_of_line(wp);
-	else if (s->sel.lineflag == LINE_SEL_RIGHT_LEFT)
+	else if (data->lineflag == LINE_SEL_RIGHT_LEFT)
 		window_copy_cursor_start_of_line(wp);
 }
 
@@ -2394,7 +2402,7 @@ window_copy_scroll_up(struct window_pane *wp, u_int ny)
 		window_copy_write_line(wp, &ctx, 1);
 	if (screen_size_y(s) > 3)
 		window_copy_write_line(wp, &ctx, screen_size_y(s) - 2);
-	if (s->sel.flag && screen_size_y(s) > ny)
+	if (s->sel != NULL && screen_size_y(s) > ny)
 		window_copy_write_line(wp, &ctx, screen_size_y(s) - ny - 1);
 	screen_write_cursormove(&ctx, data->cx, data->cy);
 	screen_write_stop(&ctx);
@@ -2422,7 +2430,7 @@ window_copy_scroll_down(struct window_pane *wp, u_int ny)
 	screen_write_cursormove(&ctx, 0, 0);
 	screen_write_insertline(&ctx, ny, 8);
 	window_copy_write_lines(wp, &ctx, 0, ny);
-	if (s->sel.flag && screen_size_y(s) > ny)
+	if (s->sel != NULL && screen_size_y(s) > ny)
 		window_copy_write_line(wp, &ctx, ny);
 	else if (ny == 1) /* nuke position */
 		window_copy_write_line(wp, &ctx, 1);
@@ -2434,13 +2442,13 @@ void
 window_copy_add_formats(struct window_pane *wp, struct format_tree *ft)
 {
 	struct window_copy_mode_data	*data = wp->modedata;
-	struct screen			*s = &data->screen;
 
 	if (wp->mode != &window_copy_mode)
 		return;
 
-	format_add(ft, "selection_present", "%d", s->sel.flag);
+	format_add(ft, "selection_present", "%d", data->screen.sel != NULL);
 	format_add(ft, "scroll_position", "%d", data->oy);
+	format_add(ft, "rectangle_toggle", "%d", data->rectflag);
 }
 
 static void

window-tree.c

@@ -18,6 +18,7 @@
 
 #include <sys/types.h>
 
+#include <ctype.h>
 #include <stdlib.h>
 #include <string.h>
 
@@ -860,8 +861,6 @@ window_tree_destroy(struct window_tree_modedata *data)
 	if (--data->references != 0)
 		return;
 
-	mode_tree_free(data->data);
-
 	for (i = 0; i < data->item_size; i++)
 		window_tree_free_item(data->item_list[i]);
 	free(data->item_list);
@@ -881,6 +880,7 @@ window_tree_free(struct window_pane *wp)
 		return;
 
 	data->dead = 1;
+	mode_tree_free(data->data);
 	window_tree_destroy(data);
 }
 
@@ -965,7 +965,7 @@ window_tree_command_callback(struct client *c, void *modedata, const char *s,
 {
 	struct window_tree_modedata	*data = modedata;
 
-	if (s == NULL || data->dead)
+	if (s == NULL || *s == '\0' || data->dead)
 		return (0);
 
 	data->entered = s;
@@ -987,6 +987,77 @@ window_tree_command_free(void *modedata)
 	window_tree_destroy(data);
 }
 
+static void
+window_tree_kill_each(__unused void* modedata, void* itemdata,
+    __unused struct client *c, __unused key_code key)
+{
+	struct window_tree_itemdata	*item = itemdata;
+	struct session			*s;
+	struct winlink			*wl;
+	struct window_pane		*wp;
+
+	window_tree_pull_item(item, &s, &wl, &wp);
+
+	switch (item->type) {
+	case WINDOW_TREE_NONE:
+		break;
+	case WINDOW_TREE_SESSION:
+		if (s != NULL) {
+			server_destroy_session(s);
+			session_destroy(s, __func__);
+		}
+		break;
+	case WINDOW_TREE_WINDOW:
+		if (wl != NULL)
+			server_kill_window(wl->window);
+		break;
+	case WINDOW_TREE_PANE:
+		if (wp != NULL)
+			server_kill_pane(wp);
+		break;
+	}
+}
+
+static int
+window_tree_kill_current_callback(struct client *c, void *modedata,
+    const char *s, __unused int done)
+{
+	struct window_tree_modedata	*data = modedata;
+	struct mode_tree_data		*mtd = data->data;
+
+	if (s == NULL || *s == '\0' || data->dead)
+		return (0);
+	if (tolower((u_char) s[0]) != 'y' || s[1] != '\0')
+		return (0);
+
+	window_tree_kill_each(data, mode_tree_get_current(mtd), c, KEYC_NONE);
+
+	data->references++;
+	cmdq_append(c, cmdq_get_callback(window_tree_command_done, data));
+
+	return (0);
+}
+
+static int
+window_tree_kill_tagged_callback(struct client *c, void *modedata,
+    const char *s, __unused int done)
+{
+	struct window_tree_modedata	*data = modedata;
+	struct mode_tree_data		*mtd = data->data;
+
+	if (s == NULL || *s == '\0' || data->dead)
+		return (0);
+	if (tolower((u_char) s[0]) != 'y' || s[1] != '\0')
+		return (0);
+
+	mode_tree_each_tagged(mtd, window_tree_kill_each, c, KEYC_NONE, 1);
+
+	data->references++;
+	cmdq_append(c, cmdq_get_callback(window_tree_command_done, data));
+
+	return (0);
+}
+
 static key_code
 window_tree_mouse(struct window_tree_modedata *data, key_code key, u_int x,
     struct window_tree_itemdata *item)
@@ -1054,10 +1125,13 @@ window_tree_key(struct window_pane *wp, struct client *c,
 {
 	struct window_tree_modedata	*data = wp->modedata;
 	struct window_tree_itemdata	*item, *new_item;
-	char				*name, *prompt;
+	char				*name, *prompt = NULL;
 	struct cmd_find_state		 fs;
 	int				 finished;
-	u_int				 tagged, x, y;
+	u_int				 tagged, x, y, idx;
+	struct session			*ns;
+	struct winlink			*nwl;
+	struct window_pane		*nwp;
 
 	item = mode_tree_get_current(data->data);
 	finished = mode_tree_key(data->data, c, &key, m, &x, &y);
@@ -1074,6 +1148,46 @@ window_tree_key(struct window_pane *wp, struct client *c,
 	case '>':
 		data->offset++;
 		break;
+	case 'x':
+		window_tree_pull_item(item, &ns, &nwl, &nwp);
+		switch (item->type) {
+		case WINDOW_TREE_NONE:
+			break;
+		case WINDOW_TREE_SESSION:
+			if (ns == NULL)
+				break;
+			xasprintf(&prompt, "Kill session %s? ", ns->name);
+			break;
+		case WINDOW_TREE_WINDOW:
+			if (nwl == NULL)
+				break;
+			xasprintf(&prompt, "Kill window %u? ", nwl->idx);
+			break;
+		case WINDOW_TREE_PANE:
+			if (nwp == NULL || window_pane_index(nwp, &idx) != 0)
+				break;
+			xasprintf(&prompt, "Kill pane %u? ", idx);
+			break;
+		}
+		if (prompt == NULL)
+			break;
+		data->references++;
+		status_prompt_set(c, prompt, "",
+		    window_tree_kill_current_callback, window_tree_command_free,
+		    data, PROMPT_SINGLE|PROMPT_NOFORMAT);
+		free(prompt);
+		break;
+	case 'X':
+		tagged = mode_tree_count_tagged(data->data);
+		if (tagged == 0)
+			break;
+		xasprintf(&prompt, "Kill %u tagged? ", tagged);
+		data->references++;
+		status_prompt_set(c, prompt, "",
+		    window_tree_kill_tagged_callback, window_tree_command_free,
+		    data, PROMPT_SINGLE|PROMPT_NOFORMAT);
+		free(prompt);
+		break;
 	case ':':
 		tagged = mode_tree_count_tagged(data->data);
 		if (tagged != 0)

window.c

@@ -921,10 +921,11 @@ window_pane_spawn(struct window_pane *wp, int argc, char **argv,
 	wp->flags &= ~(PANE_STATUSREADY|PANE_STATUSDRAWN);
 
 	cmd = cmd_stringify_argv(wp->argc, wp->argv);
-	log_debug("spawn: %s -- %s", wp->shell, cmd);
-	for (i = 0; i < wp->argc; i++)
-		log_debug("spawn: argv[%d] = %s", i, wp->argv[i]);
-	environ_log(env, "spawn: ");
+	log_debug("%s: shell=%s", __func__, wp->shell);
+	log_debug("%s: cmd=%s", __func__, cmd);
+	log_debug("%s: cwd=%s", __func__, cwd);
+	cmd_log_argv(wp->argc, wp->argv, __func__);
+	environ_log(env, "%s: environment ", __func__);
 
 	memset(&ws, 0, sizeof ws);
 	ws.ws_col = screen_size_x(&wp->base);
@@ -1005,6 +1006,8 @@ window_pane_spawn(struct window_pane *wp, int argc, char **argv,
 		execl(wp->shell, argv0, (char *)NULL);
 		fatal("execl failed");
 	}
+	log_debug("%s: master=%s", __func__, ttyname(wp->fd));
+	log_debug("%s: slave=%s", __func__, wp->tty);
 
 #ifdef HAVE_UTEMPTER
 	xsnprintf(s, sizeof s, "tmux(%lu).%%%u", (long) getpid(), wp->id);