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	Instead of every command resolving the target (-t or -s) itself, prepare
the state (client, session, winlink, pane) for it it before entering the command. Each command provides some flags that tell the prepare step what it is expecting. This is a requirement for having hooks on commands (for example, if you hook "select-window -t1:2", the hook command should to operate on window 1:2 not whatever it thinks is the current window), and should allow some other target improvements. The old cmd_find_* functions remain for the moment but that layer will be dropped later. Joint work with Thomas Adam.
This commit is contained in:
		@@ -41,7 +41,7 @@ const struct cmd_entry cmd_new_session_entry = {
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	"[-AdDEP] [-c start-directory] [-F format] [-n window-name] "
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	"[-s session-name] " CMD_TARGET_SESSION_USAGE " [-x width] "
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	"[-y height] [command]",
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	CMD_STARTSERVER,
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	CMD_STARTSERVER|CMD_CANFAIL|CMD_SESSION_T,
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	cmd_new_session_exec
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};
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@@ -49,7 +49,7 @@ const struct cmd_entry cmd_has_session_entry = {
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	"has-session", "has",
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	"t:", 0, 0,
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	CMD_TARGET_SESSION_USAGE,
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	0,
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	CMD_SESSION_T,
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	cmd_new_session_exec
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};
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@@ -57,8 +57,9 @@ enum cmd_retval
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cmd_new_session_exec(struct cmd *self, struct cmd_q *cmdq)
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{
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	struct args		*args = self->args;
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	struct client		*c = cmdq->client, *c0;
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	struct session		*s, *groupwith;
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	struct client		*c = cmdq->client;
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	struct session		*s, *attach_sess;
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	struct session		*groupwith = cmdq->state.tflag.s;
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	struct window		*w;
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	struct environ		*env;
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	struct termios		 tio, *tiop;
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@@ -71,8 +72,10 @@ cmd_new_session_exec(struct cmd *self, struct cmd_q *cmdq)
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	struct environ_entry	*envent;
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	if (self->entry == &cmd_has_session_entry) {
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		if (cmd_find_session(cmdq, args_get(args, 't'), 0) == NULL)
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			return (CMD_RETURN_ERROR);
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		/*
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		 * cmd_prepare() will fail if the session cannot be found,
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		 * hence always return success here.
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		 */
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		return (CMD_RETURN_NORMAL);
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	}
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@@ -87,9 +90,16 @@ cmd_new_session_exec(struct cmd *self, struct cmd_q *cmdq)
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			cmdq_error(cmdq, "bad session name: %s", newname);
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			return (CMD_RETURN_ERROR);
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		}
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		if (session_find(newname) != NULL) {
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		if ((attach_sess = session_find(newname)) != NULL) {
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			if (args_has(args, 'A')) {
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				return (cmd_attach_session(cmdq, newname,
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				/*
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				 * This cmdq is now destined for
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				 * attach-session.  Because attach-session
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				 * will have already been prepared, copy this
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				 * session into its tflag so it can be used.
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				 */
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				cmdq->state.tflag.s = attach_sess;
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				return (cmd_attach_session(cmdq,
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				    args_has(args, 'D'), 0, NULL,
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				    args_has(args, 'E')));
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			}
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@@ -98,12 +108,7 @@ cmd_new_session_exec(struct cmd *self, struct cmd_q *cmdq)
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		}
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	}
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	target = args_get(args, 't');
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	if (target != NULL) {
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		groupwith = cmd_find_session(cmdq, target, 0);
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		if (groupwith == NULL)
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			return (CMD_RETURN_ERROR);
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	} else
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	if ((target = args_get(args, 't')) == NULL)
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		groupwith = NULL;
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	/* Set -d if no client. */
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@@ -120,14 +125,11 @@ cmd_new_session_exec(struct cmd *self, struct cmd_q *cmdq)
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	to_free = NULL;
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	if (args_has(args, 'c')) {
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		ft = format_create(cmdq, 0);
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		format_defaults(ft, cmd_find_client(cmdq, NULL, 1), NULL, NULL,
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		    NULL);
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		format_defaults(ft, c, NULL, NULL, NULL);
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		to_free = cwd = format_expand(ft, args_get(args, 'c'));
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		format_free(ft);
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	} else if (c != NULL && c->session == NULL)
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		cwd = c->cwd;
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	else if ((c0 = cmd_find_client(cmdq, NULL, 1)) != NULL)
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		cwd = c0->session->cwd;
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	else
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		cwd = ".";
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@@ -193,7 +195,7 @@ cmd_new_session_exec(struct cmd *self, struct cmd_q *cmdq)
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	/* Figure out the command for the new window. */
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	argc = -1;
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	argv = NULL;
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	if (target == NULL && args->argc != 0) {
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	if (!args_has(args, 't') && args->argc != 0) {
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		argc = args->argc;
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		argv = args->argv;
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	} else if (target == NULL) {
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@@ -245,7 +247,7 @@ cmd_new_session_exec(struct cmd *self, struct cmd_q *cmdq)
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	 * If a target session is given, this is to be part of a session group,
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	 * so add it to the group and synchronize.
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	 */
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	if (groupwith != NULL) {
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	if (args_has(args, 't')) {
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		session_group_add(groupwith, s);
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		session_group_synchronize_to(s);
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		session_select(s, RB_MIN(winlinks, &s->windows)->idx);
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@@ -285,8 +287,7 @@ cmd_new_session_exec(struct cmd *self, struct cmd_q *cmdq)
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			template = NEW_SESSION_TEMPLATE;
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		ft = format_create(cmdq, 0);
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		format_defaults(ft, cmd_find_client(cmdq, NULL, 1), s, NULL,
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		    NULL);
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		format_defaults(ft, c, s, NULL, NULL);
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		cp = format_expand(ft, template);
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		cmdq_print(cmdq, "%s", cp);
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